/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>
* Copyright (C) 2008-2013 David Sommerseth <dazo@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* 2004-01-28: Added Socks5 proxy support
* (Christof Meerwald, http://cmeerw.org)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#elif defined(_MSC_VER)
#include "config-msvc.h"
#endif
#ifdef HAVE_CONFIG_VERSION_H
#include "config-version.h"
#endif
#include "syshead.h"
#include "buffer.h"
#include "error.h"
#include "common.h"
#include "run_command.h"
#include "shaper.h"
#include "crypto.h"
#include "ssl.h"
#include "options.h"
#include "misc.h"
#include "socket.h"
#include "packet_id.h"
#include "pkcs11.h"
#include "win32.h"
#include "push.h"
#include "pool.h"
#include "helper.h"
#include "manage.h"
#include "forward.h"
#include "ssl_verify.h"
#include "platform.h"
#include <ctype.h>
#include "memdbg.h"
const char title_string[] =
PACKAGE_STRING
#ifdef CONFIGURE_GIT_REVISION
" [git:" CONFIGURE_GIT_REVISION CONFIGURE_GIT_FLAGS "]"
#endif
" " TARGET_ALIAS
#if defined(ENABLE_CRYPTO_MBEDTLS)
" [SSL (mbed TLS)]"
#elif defined(ENABLE_CRYPTO_OPENSSL)
" [SSL (OpenSSL)]"
#else
" [SSL]"
#endif /* defined(ENABLE_CRYPTO_MBEDTLS) */
#ifdef USE_COMP
#ifdef ENABLE_LZO
" [LZO]"
#endif
#ifdef ENABLE_LZ4
" [LZ4]"
#endif
#ifdef ENABLE_COMP_STUB
" [COMP_STUB]"
#endif
#endif /* USE_COMP */
#if EPOLL
" [EPOLL]"
#endif
#ifdef PRODUCT_TAP_DEBUG
" [TAPDBG]"
#endif
#ifdef ENABLE_PKCS11
" [PKCS11]"
#endif
#if ENABLE_IP_PKTINFO
#if defined(HAVE_IN_PKTINFO) && defined(HAVE_IPI_SPEC_DST)
" [MH/PKTINFO]"
#elif defined(IP_RECVDSTADDR)
" [MH/RECVDA]"
#endif
#endif
#ifdef HAVE_AEAD_CIPHER_MODES
" [AEAD]"
#endif
" built on " __DATE__
;
#ifndef ENABLE_SMALL
static const char usage_message[] =
"%s\n"
"\n"
"General Options:\n"
"--config file : Read configuration options from file.\n"
"--help : Show options.\n"
"--version : Show copyright and version information.\n"
"\n"
"Tunnel Options:\n"
"--local host : Local host name or ip address. Implies --bind.\n"
"--remote host [port] : Remote host name or ip address.\n"
"--remote-random : If multiple --remote options specified, choose one randomly.\n"
"--remote-random-hostname : Add a random string to remote DNS name.\n"
"--mode m : Major mode, m = 'p2p' (default, point-to-point) or 'server'.\n"
"--proto p : Use protocol p for communicating with peer.\n"
" p = udp (default), tcp-server, or tcp-client\n"
"--proto-force p : only consider protocol p in list of connection profiles.\n"
" p = udp6, tcp6-server, or tcp6-client (ipv6)\n"
"--connect-retry n [m] : For client, number of seconds to wait between\n"
" connection retries (default=%d). On repeated retries\n"
" the wait time is exponentially increased to a maximum of m\n"
" (default=%d).\n"
"--connect-retry-max n : Maximum connection attempt retries, default infinite.\n"
"--http-proxy s p [up] [auth] : Connect to remote host\n"
" through an HTTP proxy at address s and port p.\n"
" If proxy authentication is required,\n"
" up is a file containing username/password on 2 lines, or\n"
" 'stdin' to prompt from console. Add auth='ntlm' if\n"
" the proxy requires NTLM authentication.\n"
"--http-proxy s p 'auto[-nct]' : Like the above directive, but automatically\n"
" determine auth method and query for username/password\n"
" if needed. auto-nct disables weak proxy auth methods.\n"
"--http-proxy-option type [parm] : Set extended HTTP proxy options.\n"
" Repeat to set multiple options.\n"
" VERSION version (default=1.0)\n"
" AGENT user-agent\n"
"--socks-proxy s [p] [up] : Connect to remote host through a Socks5 proxy at\n"
" address s and port p (default port = 1080).\n"
" If proxy authentication is required,\n"
" up is a file containing username/password on 2 lines, or\n"
" 'stdin' to prompt for console.\n"
"--socks-proxy-retry : Retry indefinitely on Socks proxy errors.\n"
"--resolv-retry n: If hostname resolve fails for --remote, retry\n"
" resolve for n seconds before failing (disabled by default).\n"
" Set n=\"infinite\" to retry indefinitely.\n"
"--float : Allow remote to change its IP address/port, such as through\n"
" DHCP (this is the default if --remote is not used).\n"
"--ipchange cmd : Run command cmd on remote ip address initial\n"
" setting or change -- execute as: cmd ip-address port#\n"
"--port port : TCP/UDP port # for both local and remote.\n"
"--lport port : TCP/UDP port # for local (default=%s). Implies --bind.\n"
"--rport port : TCP/UDP port # for remote (default=%s).\n"
"--bind : Bind to local address and port. (This is the default unless\n"
" --proto tcp-client"
" or --http-proxy"
" or --socks-proxy"
" is used).\n"
"--nobind : Do not bind to local address and port.\n"
"--dev tunX|tapX : tun/tap device (X can be omitted for dynamic device.\n"
"--dev-type dt : Which device type are we using? (dt = tun or tap) Use\n"
" this option only if the tun/tap device used with --dev\n"
" does not begin with \"tun\" or \"tap\".\n"
"--dev-node node : Explicitly set the device node rather than using\n"
" /dev/net/tun, /dev/tun, /dev/tap, etc.\n"
"--lladdr hw : Set the link layer address of the tap device.\n"
"--topology t : Set --dev tun topology: 'net30', 'p2p', or 'subnet'.\n"
#ifdef ENABLE_IPROUTE
"--iproute cmd : Use this command instead of default " IPROUTE_PATH ".\n"
#endif
"--ifconfig l rn : TUN: configure device to use IP address l as a local\n"
" endpoint and rn as a remote endpoint. l & rn should be\n"
" swapped on the other peer. l & rn must be private\n"
" addresses outside of the subnets used by either peer.\n"
" TAP: configure device to use IP address l as a local\n"
" endpoint and rn as a subnet mask.\n"
"--ifconfig-ipv6 l r : configure device to use IPv6 address l as local\n"
" endpoint (as a /64) and r as remote endpoint\n"
"--ifconfig-noexec : Don't actually execute ifconfig/netsh command, instead\n"
" pass --ifconfig parms by environment to scripts.\n"
"--ifconfig-nowarn : Don't warn if the --ifconfig option on this side of the\n"
" connection doesn't match the remote side.\n"
"--route network [netmask] [gateway] [metric] :\n"
" Add route to routing table after connection\n"
" is established. Multiple routes can be specified.\n"
" netmask default: 255.255.255.255\n"
" gateway default: taken from --route-gateway or --ifconfig\n"
" Specify default by leaving blank or setting to \"nil\".\n"
"--route-ipv6 network/bits [gateway] [metric] :\n"
" Add IPv6 route to routing table after connection\n"
" is established. Multiple routes can be specified.\n"
" gateway default: taken from 'remote' in --ifconfig-ipv6\n"
"--route-gateway gw|'dhcp' : Specify a default gateway for use with --route.\n"
"--route-metric m : Specify a default metric for use with --route.\n"
"--route-delay n [w] : Delay n seconds after connection initiation before\n"
" adding routes (may be 0). If not specified, routes will\n"
" be added immediately after tun/tap open. On Windows, wait\n"
" up to w seconds for TUN/TAP adapter to come up.\n"
"--route-up cmd : Run command cmd after routes are added.\n"
"--route-pre-down cmd : Run command cmd before routes are removed.\n"
"--route-noexec : Don't add routes automatically. Instead pass routes to\n"
" --route-up script using environmental variables.\n"
"--route-nopull : When used with --client or --pull, accept options pushed\n"
" by server EXCEPT for routes and dhcp options.\n"
"--allow-pull-fqdn : Allow client to pull DNS names from server for\n"
" --ifconfig, --route, and --route-gateway.\n"
"--redirect-gateway [flags]: Automatically execute routing\n"
" commands to redirect all outgoing IP traffic through the\n"
" VPN. Add 'local' flag if both " PACKAGE_NAME " servers are directly\n"
" connected via a common subnet, such as with WiFi.\n"
" Add 'def1' flag to set default route using using 0.0.0.0/1\n"
" and 128.0.0.0/1 rather than 0.0.0.0/0. Add 'bypass-dhcp'\n"
" flag to add a direct route to DHCP server, bypassing tunnel.\n"
" Add 'bypass-dns' flag to similarly bypass tunnel for DNS.\n"
"--redirect-private [flags]: Like --redirect-gateway, but omit actually changing\n"
" the default gateway. Useful when pushing private subnets.\n"
"--client-nat snat|dnat network netmask alias : on client add 1-to-1 NAT rule.\n"
"--push-peer-info : (client only) push client info to server.\n"
"--setenv name value : Set a custom environmental variable to pass to script.\n"
"--setenv FORWARD_COMPATIBLE 1 : Relax config file syntax checking to allow\n"
" directives for future OpenVPN versions to be ignored.\n"
"--ignore-unkown-option opt1 opt2 ...: Relax config file syntax. Allow\n"
" these options to be ignored when unknown\n"
"--script-security level: Where level can be:\n"
" 0 -- strictly no calling of external programs\n"
" 1 -- (default) only call built-ins such as ifconfig\n"
" 2 -- allow calling of built-ins and scripts\n"
" 3 -- allow password to be passed to scripts via env\n"
"--shaper n : Restrict output to peer to n bytes per second.\n"
"--keepalive n m : Helper option for setting timeouts in server mode. Send\n"
" ping once every n seconds, restart if ping not received\n"
" for m seconds.\n"
"--inactive n [bytes] : Exit after n seconds of activity on tun/tap device\n"
" produces a combined in/out byte count < bytes.\n"
"--ping-exit n : Exit if n seconds pass without reception of remote ping.\n"
"--ping-restart n: Restart if n seconds pass without reception of remote ping.\n"
"--ping-timer-rem: Run the --ping-exit/--ping-restart timer only if we have a\n"
" remote address.\n"
"--ping n : Ping remote once every n seconds over TCP/UDP port.\n"
#if ENABLE_IP_PKTINFO
"--multihome : Configure a multi-homed UDP server.\n"
#endif
"--fast-io : (experimental) Optimize TUN/TAP/UDP writes.\n"
"--remap-usr1 s : On SIGUSR1 signals, remap signal (s='SIGHUP' or 'SIGTERM').\n"
"--persist-tun : Keep tun/tap device open across SIGUSR1 or --ping-restart.\n"
"--persist-remote-ip : Keep remote IP address across SIGUSR1 or --ping-restart.\n"
"--persist-local-ip : Keep local IP address across SIGUSR1 or --ping-restart.\n"
"--persist-key : Don't re-read key files across SIGUSR1 or --ping-restart.\n"
#if PASSTOS_CAPABILITY
"--passtos : TOS passthrough (applies to IPv4 only).\n"
#endif
"--tun-mtu n : Take the tun/tap device MTU to be n and derive the\n"
" TCP/UDP MTU from it (default=%d).\n"
"--tun-mtu-extra n : Assume that tun/tap device might return as many\n"
" as n bytes more than the tun-mtu size on read\n"
" (default TUN=0 TAP=%d).\n"
"--link-mtu n : Take the TCP/UDP device MTU to be n and derive the tun MTU\n"
" from it.\n"
"--mtu-disc type : Should we do Path MTU discovery on TCP/UDP channel?\n"
" 'no' -- Never send DF (Don't Fragment) frames\n"
" 'maybe' -- Use per-route hints\n"
" 'yes' -- Always DF (Don't Fragment)\n"
#ifdef ENABLE_OCC
"--mtu-test : Empirically measure and report MTU.\n"
#endif
#ifdef ENABLE_FRAGMENT
"--fragment max : Enable internal datagram fragmentation so that no UDP\n"
" datagrams are sent which are larger than max bytes.\n"
" Adds 4 bytes of overhead per datagram.\n"
#endif
"--mssfix [n] : Set upper bound on TCP MSS, default = tun-mtu size\n"
" or --fragment max value, whichever is lower.\n"
"--sndbuf size : Set the TCP/UDP send buffer size.\n"
"--rcvbuf size : Set the TCP/UDP receive buffer size.\n"
#if defined(TARGET_LINUX) && HAVE_DECL_SO_MARK
"--mark value : Mark encrypted packets being sent with value. The mark value\n"
" can be matched in policy routing and packetfilter rules.\n"
#endif
"--txqueuelen n : Set the tun/tap TX queue length to n (Linux only).\n"
#ifdef ENABLE_MEMSTATS
"--memstats file : Write live usage stats to memory mapped binary file.\n"
#endif
"--mlock : Disable Paging -- ensures key material and tunnel\n"
" data will never be written to disk.\n"
"--up cmd : Run command cmd after successful tun device open.\n"
" Execute as: cmd tun/tap-dev tun-mtu link-mtu \\\n"
" ifconfig-local-ip ifconfig-remote-ip\n"
" (pre --user or --group UID/GID change)\n"
"--up-delay : Delay tun/tap open and possible --up script execution\n"
" until after TCP/UDP connection establishment with peer.\n"
"--down cmd : Run command cmd after tun device close.\n"
" (post --user/--group UID/GID change and/or --chroot)\n"
" (command parameters are same as --up option)\n"
"--down-pre : Run --down command before TUN/TAP close.\n"
"--up-restart : Run up/down commands for all restarts including those\n"
" caused by --ping-restart or SIGUSR1\n"
"--user user : Set UID to user after initialization.\n"
"--group group : Set GID to group after initialization.\n"
"--chroot dir : Chroot to this directory after initialization.\n"
#ifdef ENABLE_SELINUX
"--setcon context: Apply this SELinux context after initialization.\n"
#endif
"--cd dir : Change to this directory before initialization.\n"
"--daemon [name] : Become a daemon after initialization.\n"
" The optional 'name' parameter will be passed\n"
" as the program name to the system logger.\n"
"--syslog [name] : Output to syslog, but do not become a daemon.\n"
" See --daemon above for a description of the 'name' parm.\n"
"--inetd [name] ['wait'|'nowait'] : Run as an inetd or xinetd server.\n"
" See --daemon above for a description of the 'name' parm.\n"
"--log file : Output log to file which is created/truncated on open.\n"
"--log-append file : Append log to file, or create file if nonexistent.\n"
"--suppress-timestamps : Don't log timestamps to stdout/stderr.\n"
"--machine-readable-output : Always log timestamp, message flags to stdout/stderr.\n"
"--writepid file : Write main process ID to file.\n"
"--nice n : Change process priority (>0 = lower, <0 = higher).\n"
"--echo [parms ...] : Echo parameters to log output.\n"
"--verb n : Set output verbosity to n (default=%d):\n"
" (Level 3 is recommended if you want a good summary\n"
" of what's happening without being swamped by output).\n"
" : 0 -- no output except fatal errors\n"
" : 1 -- startup info + connection initiated messages +\n"
" non-fatal encryption & net errors\n"
" : 2,3 -- show TLS negotiations & route info\n"
" : 4 -- show parameters\n"
" : 5 -- show 'RrWw' chars on console for each packet sent\n"
" and received from TCP/UDP (caps) or tun/tap (lc)\n"
" : 6 to 11 -- debug messages of increasing verbosity\n"
"--mute n : Log at most n consecutive messages in the same category.\n"
"--status file n : Write operational status to file every n seconds.\n"
"--status-version [n] : Choose the status file format version number.\n"
" Currently, n can be 1, 2, or 3 (default=1).\n"
#ifdef ENABLE_OCC
"--disable-occ : Disable options consistency check between peers.\n"
#endif
#ifdef ENABLE_DEBUG
"--gremlin mask : Special stress testing mode (for debugging only).\n"
#endif
#if defined(USE_COMP)
"--compress alg : Use compression algorithm alg\n"
#if defined(ENABLE_LZO)
"--comp-lzo : Use LZO compression -- may add up to 1 byte per\n"
" packet for uncompressible data.\n"
"--comp-noadapt : Don't use adaptive compression when --comp-lzo\n"
" is specified.\n"
#endif
#endif
#ifdef ENABLE_MANAGEMENT
"--management ip port [pass] : Enable a TCP server on ip:port to handle\n"
" management functions. pass is a password file\n"
" or 'stdin' to prompt from console.\n"
#if UNIX_SOCK_SUPPORT
" To listen on a unix domain socket, specific the pathname\n"
" in place of ip and use 'unix' as the port number.\n"
#endif
"--management-client : Management interface will connect as a TCP client to\n"
" ip/port rather than listen as a TCP server.\n"
"--management-query-passwords : Query management channel for private key\n"
" and auth-user-pass passwords.\n"
"--management-query-proxy : Query management channel for proxy information.\n"
"--management-query-remote : Query management channel for --remote directive.\n"
"--management-hold : Start " PACKAGE_NAME " in a hibernating state, until a client\n"
" of the management interface explicitly starts it.\n"
"--management-signal : Issue SIGUSR1 when management disconnect event occurs.\n"
"--management-forget-disconnect : Forget passwords when management disconnect\n"
" event occurs.\n"
"--management-up-down : Report tunnel up/down events to management interface.\n"
"--management-log-cache n : Cache n lines of log file history for usage\n"
" by the management channel.\n"
#if UNIX_SOCK_SUPPORT
"--management-client-user u : When management interface is a unix socket, only\n"
" allow connections from user u.\n"
"--management-client-group g : When management interface is a unix socket, only\n"
" allow connections from group g.\n"
#endif
#ifdef MANAGEMENT_DEF_AUTH
"--management-client-auth : gives management interface client the responsibility\n"
" to authenticate clients after their client certificate\n"
" has been verified.\n"
#endif
#ifdef MANAGEMENT_PF
"--management-client-pf : management interface clients must specify a packet\n"
" filter file for each connecting client.\n"
#endif
#endif /* ifdef ENABLE_MANAGEMENT */
#ifdef ENABLE_PLUGIN
"--plugin m [str]: Load plug-in module m passing str as an argument\n"
" to its initialization function.\n"
#endif
#if P2MP
#if P2MP_SERVER
"\n"
"Multi-Client Server options (when --mode server is used):\n"
"--server network netmask : Helper option to easily configure server mode.\n"
"--server-ipv6 network/bits : Configure IPv6 server mode.\n"
"--server-bridge [IP netmask pool-start-IP pool-end-IP] : Helper option to\n"
" easily configure ethernet bridging server mode.\n"
"--push \"option\" : Push a config file option back to the peer for remote\n"
" execution. Peer must specify --pull in its config file.\n"
"--push-reset : Don't inherit global push list for specific\n"
" client instance.\n"
"--ifconfig-pool start-IP end-IP [netmask] : Set aside a pool of subnets\n"
" to be dynamically allocated to connecting clients.\n"
"--ifconfig-pool-linear : (DEPRECATED) Use individual addresses rather \n"
" than /30 subnets\n in tun mode. Not compatible with\n"
" Windows clients.\n"
"--ifconfig-pool-persist file [seconds] : Persist/unpersist ifconfig-pool\n"
" data to file, at seconds intervals (default=600).\n"
" If seconds=0, file will be treated as read-only.\n"
"--ifconfig-ipv6-pool base-IP/bits : set aside an IPv6 network block\n"
" to be dynamically allocated to connecting clients.\n"
"--ifconfig-push local remote-netmask : Push an ifconfig option to remote,\n"
" overrides --ifconfig-pool dynamic allocation.\n"
" Only valid in a client-specific config file.\n"
"--ifconfig-ipv6-push local/bits remote : Push an ifconfig-ipv6 option to\n"
" remote, overrides --ifconfig-ipv6-pool allocation.\n"
" Only valid in a client-specific config file.\n"
"--iroute network [netmask] : Route subnet to client.\n"
"--iroute-ipv6 network/bits : Route IPv6 subnet to client.\n"
" Sets up internal routes only.\n"
" Only valid in a client-specific config file.\n"
"--disable : Client is disabled.\n"
" Only valid in a client-specific config file.\n"
"--client-cert-not-required : (DEPRECATED) Don't require client certificate, client\n"
" will authenticate using username/password.\n"
"--verify-client-cert [none|optional|require] : perform no, optional or\n"
" mandatory client certificate verification.\n"
" Default is to require the client to supply a certificate.\n"
"--username-as-common-name : For auth-user-pass authentication, use\n"
" the authenticated username as the common name,\n"
" rather than the common name from the client cert.\n"
"--auth-user-pass-verify cmd method: Query client for username/password and\n"
" run command cmd to verify. If method='via-env', pass\n"
" user/pass via environment, if method='via-file', pass\n"
" user/pass via temporary file.\n"
"--auth-gen-token [lifetime] Generate a random authentication token which is pushed\n"
" to each client, replacing the password. Usefull when\n"
" OTP based two-factor auth mechanisms are in use and\n"
" --reneg-* options are enabled. Optionally a lifetime in seconds\n"
" for generated tokens can be set.\n"
"--opt-verify : Clients that connect with options that are incompatible\n"
" with those of the server will be disconnected.\n"
"--auth-user-pass-optional : Allow connections by clients that don't\n"
" specify a username/password.\n"
"--no-name-remapping : (DEPRECATED) Allow Common Name and X509 Subject to include\n"
" any printable character.\n"
"--client-to-client : Internally route client-to-client traffic.\n"
"--duplicate-cn : Allow multiple clients with the same common name to\n"
" concurrently connect.\n"
"--client-connect cmd : Run command cmd on client connection.\n"
"--client-disconnect cmd : Run command cmd on client disconnection.\n"
"--client-config-dir dir : Directory for custom client config files.\n"
"--ccd-exclusive : Refuse connection unless custom client config is found.\n"
"--tmp-dir dir : Temporary directory, used for --client-connect return file and plugin communication.\n"
"--hash-size r v : Set the size of the real address hash table to r and the\n"
" virtual address table to v.\n"
"--bcast-buffers n : Allocate n broadcast buffers.\n"
"--tcp-queue-limit n : Maximum number of queued TCP output packets.\n"
"--tcp-nodelay : Macro that sets TCP_NODELAY socket flag on the server\n"
" as well as pushes it to connecting clients.\n"
"--learn-address cmd : Run command cmd to validate client virtual addresses.\n"
"--connect-freq n s : Allow a maximum of n new connections per s seconds.\n"
"--max-clients n : Allow a maximum of n simultaneously connected clients.\n"
"--max-routes-per-client n : Allow a maximum of n internal routes per client.\n"
"--stale-routes-check n [t] : Remove routes with a last activity timestamp\n"
" older than n seconds. Run this check every t\n"
" seconds (defaults to n).\n"
"--explicit-exit-notify [n] : In UDP server mode send [RESTART] command on exit/restart to connected\n"
" clients. n = 1 - reconnect to same server,\n"
" 2 - advance to next server, default=1.\n"
#if PORT_SHARE
"--port-share host port [dir] : When run in TCP mode, proxy incoming HTTPS\n"
" sessions to a web server at host:port. dir specifies an\n"
" optional directory to write origin IP:port data.\n"
#endif
#endif /* if P2MP_SERVER */
"\n"
"Client options (when connecting to a multi-client server):\n"
"--client : Helper option to easily configure client mode.\n"
"--auth-user-pass [up] : Authenticate with server using username/password.\n"
" up is a file containing the username on the first line,\n"
" and a password on the second. If either the password or both\n"
" the username and the password are omitted OpenVPN will prompt\n"
" for them from console.\n"
"--pull : Accept certain config file options from the peer as if they\n"
" were part of the local config file. Must be specified\n"
" when connecting to a '--mode server' remote host.\n"
"--pull-filter accept|ignore|reject t : Filter each option received from the\n"
" server if it starts with the text t. The action flag accept,\n"
" ignore or reject causes the option to be allowed, removed or\n"
" rejected with error. May be specified multiple times, and\n"
" each filter is applied in the order of appearance.\n"
"--auth-retry t : How to handle auth failures. Set t to\n"
" none (default), interact, or nointeract.\n"
"--static-challenge t e : Enable static challenge/response protocol using\n"
" challenge text t, with e indicating echo flag (0|1)\n"
"--connect-timeout n : when polling possible remote servers to connect to\n"
" in a round-robin fashion, spend no more than n seconds\n"
" waiting for a response before trying the next server.\n"
"--allow-recursive-routing : When this option is set, OpenVPN will not drop\n"
" incoming tun packets with same destination as host.\n"
#endif /* if P2MP */
#ifdef ENABLE_OCC
"--explicit-exit-notify [n] : On exit/restart, send exit signal to\n"
" server/remote. n = # of retries, default=1.\n"
#endif
"\n"
"Data Channel Encryption Options (must be compatible between peers):\n"
"(These options are meaningful for both Static Key & TLS-mode)\n"
"--secret f [d] : Enable Static Key encryption mode (non-TLS).\n"
" Use shared secret file f, generate with --genkey.\n"
" The optional d parameter controls key directionality.\n"
" If d is specified, use separate keys for each\n"
" direction, set d=0 on one side of the connection,\n"
" and d=1 on the other side.\n"
"--auth alg : Authenticate packets with HMAC using message\n"
" digest algorithm alg (default=%s).\n"
" (usually adds 16 or 20 bytes per packet)\n"
" Set alg=none to disable authentication.\n"
"--cipher alg : Encrypt packets with cipher algorithm alg\n"
" (default=%s).\n"
" Set alg=none to disable encryption.\n"
"--ncp-ciphers list : List of ciphers that are allowed to be negotiated.\n"
"--ncp-disable : Disable cipher negotiation.\n"
"--prng alg [nsl] : For PRNG, use digest algorithm alg, and\n"
" nonce_secret_len=nsl. Set alg=none to disable PRNG.\n"
#ifdef HAVE_EVP_CIPHER_CTX_SET_KEY_LENGTH
"--keysize n : (DEPRECATED) Size of cipher key in bits (optional).\n"
" If unspecified, defaults to cipher-specific default.\n"
#endif
#ifndef ENABLE_CRYPTO_MBEDTLS
"--engine [name] : Enable OpenSSL hardware crypto engine functionality.\n"
#endif
"--no-replay : (DEPRECATED) Disable replay protection.\n"
"--mute-replay-warnings : Silence the output of replay warnings to log file.\n"
"--replay-window n [t] : Use a replay protection sliding window of size n\n"
" and a time window of t seconds.\n"
" Default n=%d t=%d\n"
"--replay-persist file : Persist replay-protection state across sessions\n"
" using file.\n"
"--test-crypto : Run a self-test of crypto features enabled.\n"
" For debugging only.\n"
#ifdef ENABLE_PREDICTION_RESISTANCE
"--use-prediction-resistance: Enable prediction resistance on the random\n"
" number generator.\n"
#endif
"\n"
"TLS Key Negotiation Options:\n"
"(These options are meaningful only for TLS-mode)\n"
"--tls-server : Enable TLS and assume server role during TLS handshake.\n"
"--tls-client : Enable TLS and assume client role during TLS handshake.\n"
"--key-method m : (DEPRECATED) Data channel key exchange method. m should be a method\n"
" number, such as 1 (default), 2, etc.\n"
"--ca file : Certificate authority file in .pem format containing\n"
" root certificate.\n"
#ifndef ENABLE_CRYPTO_MBEDTLS
"--capath dir : A directory of trusted certificates (CAs"
" and CRLs).\n"
#endif /* ENABLE_CRYPTO_MBEDTLS */
"--dh file : File containing Diffie Hellman parameters\n"
" in .pem format (for --tls-server only).\n"
" Use \"openssl dhparam -out dh1024.pem 1024\" to generate.\n"
"--cert file : Local certificate in .pem format -- must be signed\n"
" by a Certificate Authority in --ca file.\n"
"--extra-certs file : one or more PEM certs that complete the cert chain.\n"
"--key file : Local private key in .pem format.\n"
"--tls-version-min <version> ['or-highest'] : sets the minimum TLS version we\n"
" will accept from the peer. If version is unrecognized and 'or-highest'\n"
" is specified, require max TLS version supported by SSL implementation.\n"
"--tls-version-max <version> : sets the maximum TLS version we will use.\n"
#ifndef ENABLE_CRYPTO_MBEDTLS
"--pkcs12 file : PKCS#12 file containing local private key, local certificate\n"
" and optionally the root CA certificate.\n"
#endif
#ifdef ENABLE_X509ALTUSERNAME
"--x509-username-field : Field in x509 certificate containing the username.\n"
" Default is CN in the Subject field.\n"
#endif
"--verify-hash hash [algo] : Specify fingerprint for level-1 certificate.\n"
" Valid algo flags are SHA1 and SHA256. \n"
#ifdef _WIN32
"--cryptoapicert select-string : Load the certificate and private key from the\n"
" Windows Certificate System Store.\n"
#endif
"--tls-cipher l : A list l of allowable TLS ciphers separated by : (optional).\n"
" : Use --show-tls to see a list of supported TLS ciphers.\n"
"--tls-cert-profile p : Set the allowed certificate crypto algorithm profile\n"
" (default=legacy).\n"
"--tls-timeout n : Packet retransmit timeout on TLS control channel\n"
" if no ACK from remote within n seconds (default=%d).\n"
"--reneg-bytes n : Renegotiate data chan. key after n bytes sent and recvd.\n"
"--reneg-pkts n : Renegotiate data chan. key after n packets sent and recvd.\n"
"--reneg-sec max [min] : Renegotiate data chan. key after at most max (default=%d)\n"
" and at least min (defaults to 90%% of max on servers and equal\n"
" to max on clients).\n"
"--hand-window n : Data channel key exchange must finalize within n seconds\n"
" of handshake initiation by any peer (default=%d).\n"
"--tran-window n : Transition window -- old key can live this many seconds\n"
" after new key renegotiation begins (default=%d).\n"
"--single-session: Allow only one session (reset state on restart).\n"
"--tls-exit : Exit on TLS negotiation failure.\n"
"--tls-auth f [d]: Add an additional layer of authentication on top of the TLS\n"
" control channel to protect against attacks on the TLS stack\n"
" and DoS attacks.\n"
" f (required) is a shared-secret key file.\n"
" The optional d parameter controls key directionality,\n"
" see --secret option for more info.\n"
"--tls-crypt key : Add an additional layer of authenticated encryption on top\n"
" of the TLS control channel to hide the TLS certificate,\n"
" provide basic post-quantum security and protect against\n"
" attacks on the TLS stack and DoS attacks.\n"
" key (required) provides the pre-shared key file.\n"
" see --secret option for more info.\n"
"--askpass [file]: Get PEM password from controlling tty before we daemonize.\n"
"--auth-nocache : Don't cache --askpass or --auth-user-pass passwords.\n"
"--crl-verify crl ['dir']: Check peer certificate against a CRL.\n"
"--tls-verify cmd: Run command cmd to verify the X509 name of a\n"
" pending TLS connection that has otherwise passed all other\n"
" tests of certification. cmd should return 0 to allow\n"
" TLS handshake to proceed, or 1 to fail. (cmd is\n"
" executed as 'cmd certificate_depth subject')\n"
"--tls-export-cert [directory] : Get peer cert in PEM format and store it \n"
" in an openvpn temporary file in [directory]. Peer cert is \n"
" stored before tls-verify script execution and deleted after.\n"
"--verify-x509-name name: Accept connections only from a host with X509 subject\n"
" DN name. The remote host must also pass all other tests\n"
" of verification.\n"
"--ns-cert-type t: (DEPRECATED) Require that peer certificate was signed with \n"
" an explicit nsCertType designation t = 'client' | 'server'.\n"
"--x509-track x : Save peer X509 attribute x in environment for use by\n"
" plugins and management interface.\n"
#if defined(ENABLE_CRYPTO_OPENSSL) && OPENSSL_VERSION_NUMBER >= 0x10001000
"--keying-material-exporter label len : Save Exported Keying Material (RFC5705)\n"
" of len bytes (min. 16 bytes) using label in environment for use by plugins.\n"
#endif
"--remote-cert-ku v ... : Require that the peer certificate was signed with\n"
" explicit key usage, you can specify more than one value.\n"
" value should be given in hex format.\n"
"--remote-cert-eku oid : Require that the peer certificate was signed with\n"
" explicit extended key usage. Extended key usage can be encoded\n"
" as an object identifier or OpenSSL string representation.\n"
"--remote-cert-tls t: Require that peer certificate was signed with explicit\n"
" key usage and extended key usage based on RFC3280 TLS rules.\n"
" t = 'client' | 'server'.\n"
#ifdef ENABLE_PKCS11
"\n"
"PKCS#11 Options:\n"
"--pkcs11-providers provider ... : PKCS#11 provider to load.\n"
"--pkcs11-protected-authentication [0|1] ... : Use PKCS#11 protected authentication\n"
" path. Set for each provider.\n"
"--pkcs11-private-mode hex ... : PKCS#11 private key mode mask.\n"
" 0 : Try to determind automatically (default).\n"
" 1 : Use Sign.\n"
" 2 : Use SignRecover.\n"
" 4 : Use Decrypt.\n"
" 8 : Use Unwrap.\n"
"--pkcs11-cert-private [0|1] ... : Set if login should be performed before\n"
" certificate can be accessed. Set for each provider.\n"
"--pkcs11-pin-cache seconds : Number of seconds to cache PIN. The default is -1\n"
" cache until token is removed.\n"
"--pkcs11-id-management : Acquire identity from management interface.\n"
"--pkcs11-id serialized-id 'id' : Identity to use, get using standalone --show-pkcs11-ids\n"
#endif /* ENABLE_PKCS11 */
"\n"
"SSL Library information:\n"
"--show-ciphers : Show cipher algorithms to use with --cipher option.\n"
"--show-digests : Show message digest algorithms to use with --auth option.\n"
"--show-engines : Show hardware crypto accelerator engines (if available).\n"
"--show-tls : Show all TLS ciphers (TLS used only as a control channel).\n"
#ifdef _WIN32
"\n"
"Windows Specific:\n"
"--win-sys path : Pathname of Windows system directory. Default is the pathname\n"
" from SystemRoot environment variable.\n"
"--ip-win32 method : When using --ifconfig on Windows, set TAP-Windows adapter\n"
" IP address using method = manual, netsh, ipapi,\n"
" dynamic, or adaptive (default = adaptive).\n"
" Dynamic method allows two optional parameters:\n"
" offset: DHCP server address offset (> -256 and < 256).\n"
" If 0, use network address, if >0, take nth\n"
" address forward from network address, if <0,\n"
" take nth address backward from broadcast\n"
" address.\n"
" Default is 0.\n"
" lease-time: Lease time in seconds.\n"
" Default is one year.\n"
"--route-method : Which method to use for adding routes on Windows?\n"
" adaptive (default) -- Try ipapi then fall back to exe.\n"
" ipapi -- Use IP helper API.\n"
" exe -- Call the route.exe shell command.\n"
"--dhcp-option type [parm] : Set extended TAP-Windows properties, must\n"
" be used with --ip-win32 dynamic. For options\n"
" which allow multiple addresses,\n"
" --dhcp-option must be repeated.\n"
" DOMAIN name : Set DNS suffix\n"
" DNS addr : Set domain name server address(es) (IPv4 and IPv6)\n"
" NTP : Set NTP server address(es)\n"
" NBDD : Set NBDD server address(es)\n"
" WINS addr : Set WINS server address(es)\n"
" NBT type : Set NetBIOS over TCP/IP Node type\n"
" 1: B, 2: P, 4: M, 8: H\n"
" NBS id : Set NetBIOS scope ID\n"
" DISABLE-NBT : Disable Netbios-over-TCP/IP.\n"
"--dhcp-renew : Ask Windows to renew the TAP adapter lease on startup.\n"
"--dhcp-pre-release : Ask Windows to release the previous TAP adapter lease on\n"
" startup.\n"
"--register-dns : Run ipconfig /flushdns and ipconfig /registerdns\n"
" on connection initiation.\n"
"--tap-sleep n : Sleep for n seconds after TAP adapter open before\n"
" attempting to set adapter properties.\n"
"--pause-exit : When run from a console window, pause before exiting.\n"
"--service ex [0|1] : For use when " PACKAGE_NAME " is being instantiated by a\n"
" service, and should not be used directly by end-users.\n"
" ex is the name of an event object which, when\n"
" signaled, will cause " PACKAGE_NAME " to exit. A second\n"
" optional parameter controls the initial state of ex.\n"
"--show-net-up : Show " PACKAGE_NAME "'s view of routing table and net adapter list\n"
" after TAP adapter is up and routes have been added.\n"
#ifdef _WIN32
"--block-outside-dns : Block DNS on other network adapters to prevent DNS leaks\n"
#endif
"Windows Standalone Options:\n"
"\n"
"--show-adapters : Show all TAP-Windows adapters.\n"
"--show-net : Show " PACKAGE_NAME "'s view of routing table and net adapter list.\n"
"--show-valid-subnets : Show valid subnets for --dev tun emulation.\n"
"--allow-nonadmin [TAP-adapter] : Allow " PACKAGE_NAME " running without admin privileges\n"
" to access TAP adapter.\n"
#endif /* ifdef _WIN32 */
"\n"
"Generate a random key (only for non-TLS static key encryption mode):\n"
"--genkey : Generate a random key to be used as a shared secret,\n"
" for use with the --secret option.\n"
"--secret file : Write key to file.\n"
#ifdef ENABLE_FEATURE_TUN_PERSIST
"\n"
"Tun/tap config mode (available with linux 2.4+):\n"
"--mktun : Create a persistent tunnel.\n"
"--rmtun : Remove a persistent tunnel.\n"
"--dev tunX|tapX : tun/tap device\n"
"--dev-type dt : Device type. See tunnel options above for details.\n"
"--user user : User to set privilege to.\n"
"--group group : Group to set privilege to.\n"
#endif
#ifdef ENABLE_PKCS11
"\n"
"PKCS#11 standalone options:\n"
#ifdef DEFAULT_PKCS11_MODULE
"--show-pkcs11-ids [provider] [cert_private] : Show PKCS#11 available ids.\n"
#else
"--show-pkcs11-ids provider [cert_private] : Show PKCS#11 available ids.\n"
#endif
" --verb option can be added *BEFORE* this.\n"
#endif /* ENABLE_PKCS11 */
"\n"
"General Standalone Options:\n"
#ifdef ENABLE_DEBUG
"--show-gateway : Show info about default gateway.\n"
#endif
;
#endif /* !ENABLE_SMALL */
/*
* This is where the options defaults go.
* Any option not explicitly set here
* will be set to 0.
*/
void
init_options(struct options *o, const bool init_gc)
{
CLEAR(*o);
if (init_gc)
{
gc_init(&o->gc);
o->gc_owned = true;
}
o->mode = MODE_POINT_TO_POINT;
o->topology = TOP_NET30;
o->ce.proto = PROTO_UDP;
o->ce.af = AF_UNSPEC;
o->ce.bind_ipv6_only = false;
o->ce.connect_retry_seconds = 5;
o->ce.connect_retry_seconds_max = 300;
o->ce.connect_timeout = 120;
o->connect_retry_max = 0;
o->ce.local_port = o->ce.remote_port = OPENVPN_PORT;
o->verbosity = 1;
o->status_file_update_freq = 60;
o->status_file_version = 1;
o->ce.bind_local = true;
o->ce.tun_mtu = TUN_MTU_DEFAULT;
o->ce.link_mtu = LINK_MTU_DEFAULT;
o->ce.mtu_discover_type = -1;
o->ce.mssfix = MSSFIX_DEFAULT;
o->route_delay_window = 30;
o->resolve_retry_seconds = RESOLV_RETRY_INFINITE;
o->resolve_in_advance = false;
o->proto_force = -1;
#ifdef ENABLE_OCC
o->occ = true;
#endif
#ifdef ENABLE_MANAGEMENT
o->management_log_history_cache = 250;
o->management_echo_buffer_size = 100;
o->management_state_buffer_size = 100;
#endif
#ifdef ENABLE_FEATURE_TUN_PERSIST
o->persist_mode = 1;
#endif
#ifdef TARGET_LINUX
o->tuntap_options.txqueuelen = 100;
#endif
#ifdef _WIN32
#if 0
o->tuntap_options.ip_win32_type = IPW32_SET_ADAPTIVE;
#else
o->tuntap_options.ip_win32_type = IPW32_SET_DHCP_MASQ;
#endif
o->tuntap_options.dhcp_lease_time = 31536000; /* one year */
o->tuntap_options.dhcp_masq_offset = 0; /* use network address as internal DHCP server address */
o->route_method = ROUTE_METHOD_ADAPTIVE;
o->block_outside_dns = false;
#endif
#if P2MP_SERVER
o->real_hash_size = 256;
o->virtual_hash_size = 256;
o->n_bcast_buf = 256;
o->tcp_queue_limit = 64;
o->max_clients = 1024;
o->max_routes_per_client = 256;
o->stale_routes_check_interval = 0;
o->ifconfig_pool_persist_refresh_freq = 600;
#endif
#if P2MP
o->scheduled_exit_interval = 5;
#endif
o->ciphername = "BF-CBC";
#ifdef HAVE_AEAD_CIPHER_MODES /* IV_NCP=2 requires GCM support */
o->ncp_enabled = true;
#else
o->ncp_enabled = false;
#endif
o->ncp_ciphers = "AES-256-GCM:AES-128-GCM";
o->authname = "SHA1";
o->prng_hash = "SHA1";
o->prng_nonce_secret_len = 16;
o->replay = true;
o->replay_window = DEFAULT_SEQ_BACKTRACK;
o->replay_time = DEFAULT_TIME_BACKTRACK;
o->key_direction = KEY_DIRECTION_BIDIRECTIONAL;
#ifdef ENABLE_PREDICTION_RESISTANCE
o->use_prediction_resistance = false;
#endif
o->key_method = 2;
o->tls_timeout = 2;
o->renegotiate_bytes = -1;
o->renegotiate_seconds = 3600;
o->renegotiate_seconds_min = -1;
o->handshake_window = 60;
o->transition_window = 3600;
o->tls_cert_profile = NULL;
o->ecdh_curve = NULL;
#ifdef ENABLE_X509ALTUSERNAME
o->x509_username_field = X509_USERNAME_FIELD_DEFAULT;
#endif
#ifdef ENABLE_PKCS11
o->pkcs11_pin_cache_period = -1;
#endif /* ENABLE_PKCS11 */
/* P2MP server context features */
#if P2MP_SERVER
o->auth_token_generate = false;
/* Set default --tmp-dir */
#ifdef _WIN32
/* On Windows, find temp dir via enviroment variables */
o->tmp_dir = win_get_tempdir();
#else
/* Non-windows platforms use $TMPDIR, and if not set, default to '/tmp' */
o->tmp_dir = getenv("TMPDIR");
if (!o->tmp_dir)
{
o->tmp_dir = "/tmp";
}
#endif /* _WIN32 */
#endif /* P2MP_SERVER */
o->allow_recursive_routing = false;
}
void
uninit_options(struct options *o)
{
if (o->gc_owned)
{
gc_free(&o->gc);
}
}
struct pull_filter
{
#define PUF_TYPE_UNDEF 0 /** undefined filter type */
#define PUF_TYPE_ACCEPT 1 /** filter type to accept a matching option */
#define PUF_TYPE_IGNORE 2 /** filter type to ignore a matching option */
#define PUF_TYPE_REJECT 3 /** filter type to reject and trigger SIGUSR1 */
int type;
int size;
char *pattern;
struct pull_filter *next;
};
struct pull_filter_list
{
struct pull_filter *head;
struct pull_filter *tail;
};
static const char *
pull_filter_type_name(int type)
{
if (type == PUF_TYPE_ACCEPT)
{
return "accept";
}
if (type == PUF_TYPE_IGNORE)
{
return "ignore";
}
if (type == PUF_TYPE_REJECT)
{
return "reject";
}
else
{
return "???";
}
}
#ifndef ENABLE_SMALL
#define SHOW_PARM(name, value, format) msg(D_SHOW_PARMS, " " #name " = " format, (value))
#define SHOW_STR(var) SHOW_PARM(var, (o->var ? o->var : "[UNDEF]"), "'%s'")
#define SHOW_INT(var) SHOW_PARM(var, o->var, "%d")
#define SHOW_UINT(var) SHOW_PARM(var, o->var, "%u")
#define SHOW_UNSIGNED(var) SHOW_PARM(var, o->var, "0x%08x")
#define SHOW_BOOL(var) SHOW_PARM(var, (o->var ? "ENABLED" : "DISABLED"), "%s");
#endif
static void
setenv_connection_entry(struct env_set *es,
const struct connection_entry *e,
const int i)
{
setenv_str_i(es, "proto", proto2ascii(e->proto, e->af, false), i);
setenv_str_i(es, "local", e->local, i);
setenv_str_i(es, "local_port", e->local_port, i);
setenv_str_i(es, "remote", e->remote, i);
setenv_str_i(es, "remote_port", e->remote_port, i);
if (e->http_proxy_options)
{
setenv_str_i(es, "http_proxy_server", e->http_proxy_options->server, i);
setenv_str_i(es, "http_proxy_port", e->http_proxy_options->port, i);
}
if (e->socks_proxy_server)
{
setenv_str_i(es, "socks_proxy_server", e->socks_proxy_server, i);
setenv_str_i(es, "socks_proxy_port", e->socks_proxy_port, i);
}
}
void
setenv_settings(struct env_set *es, const struct options *o)
{
setenv_str(es, "config", o->config);
setenv_int(es, "verb", o->verbosity);
setenv_int(es, "daemon", o->daemon);
setenv_int(es, "daemon_log_redirect", o->log);
setenv_long_long(es, "daemon_start_time", time(NULL));
setenv_int(es, "daemon_pid", platform_getpid());
if (o->connection_list)
{
int i;
for (i = 0; i < o->connection_list->len; ++i)
{
setenv_connection_entry(es, o->connection_list->array[i], i+1);
}
}
else
{
setenv_connection_entry(es, &o->ce, 1);
}
}
static in_addr_t
get_ip_addr(const char *ip_string, int msglevel, bool *error)
{
unsigned int flags = GETADDR_HOST_ORDER;
bool succeeded = false;
in_addr_t ret;
if (msglevel & M_FATAL)
{
flags |= GETADDR_FATAL;
}
ret = getaddr(flags, ip_string, 0, &succeeded, NULL);
if (!succeeded && error)
{
*error = true;
}
return ret;
}
/* helper: parse a text string containing an IPv6 address + netbits
* in "standard format" (2001:dba::/32)
* "/nn" is optional, default to /64 if missing
*
* return true if parsing succeeded, modify *network and *netbits
*/
bool
get_ipv6_addr( const char *prefix_str, struct in6_addr *network,
unsigned int *netbits, int msglevel)
{
char *sep, *endp;
int bits;
struct in6_addr t_network;
sep = strchr( prefix_str, '/' );
if (sep == NULL)
{
bits = 64;
}
else
{
bits = strtol( sep+1, &endp, 10 );
if (*endp != '\0' || bits < 0 || bits > 128)
{
msg(msglevel, "IPv6 prefix '%s': invalid '/bits' spec", prefix_str);
return false;
}
}
/* temporary replace '/' in caller-provided string with '\0', otherwise
* inet_pton() will refuse prefix string
* (alternative would be to strncpy() the prefix to temporary buffer)
*/
if (sep != NULL)
{
*sep = '\0';
}
if (inet_pton( AF_INET6, prefix_str, &t_network ) != 1)
{
msg(msglevel, "IPv6 prefix '%s': invalid IPv6 address", prefix_str);
return false;
}
if (sep != NULL)
{
*sep = '/';
}
if (netbits != NULL)
{
*netbits = bits;
}
if (network != NULL)
{
*network = t_network;
}
return true; /* parsing OK, values set */
}
/**
* Returns newly allocated string containing address part without "/nn".
*
* If gc != NULL, the allocated memory is registered in the supplied gc.
*/
static char *
get_ipv6_addr_no_netbits(const char *addr, struct gc_arena *gc)
{
const char *end = strchr(addr, '/');
char *ret = NULL;
if (NULL == end)
{
ret = string_alloc(addr, gc);
}
else
{
size_t len = end - addr;
ret = gc_malloc(len + 1, true, gc);
memcpy(ret, addr, len);
}
return ret;
}
static bool
ipv6_addr_safe_hexplusbits( const char *ipv6_prefix_spec )
{
struct in6_addr t_addr;
unsigned int t_bits;
return get_ipv6_addr( ipv6_prefix_spec, &t_addr, &t_bits, M_WARN );
}
static char *
string_substitute(const char *src, int from, int to, struct gc_arena *gc)
{
char *ret = (char *) gc_malloc(strlen(src) + 1, true, gc);
char *dest = ret;
char c;
do
{
c = *src++;
if (c == from)
{
c = to;
}
*dest++ = c;
}
while (c);
return ret;
}
static uint8_t *
parse_hash_fingerprint(const char *str, int nbytes, int msglevel, struct gc_arena *gc)
{
int i;
const char *cp = str;
uint8_t *ret = (uint8_t *) gc_malloc(nbytes, true, gc);
char term = 1;
int byte;
char bs[3];
for (i = 0; i < nbytes; ++i)
{
if (strlen(cp) < 2)
{
msg(msglevel, "format error in hash fingerprint: %s", str);
}
bs[0] = *cp++;
bs[1] = *cp++;
bs[2] = 0;
byte = 0;
if (sscanf(bs, "%x", &byte) != 1)
{
msg(msglevel, "format error in hash fingerprint hex byte: %s", str);
}
ret[i] = (uint8_t)byte;
term = *cp++;
if (term != ':' && term != 0)
{
msg(msglevel, "format error in hash fingerprint delimiter: %s", str);
}
if (term == 0)
{
break;
}
}
if (term != 0 || i != nbytes-1)
{
msg(msglevel, "hash fingerprint is different length than expected (%d bytes): %s", nbytes, str);
}
return ret;
}
#ifdef _WIN32
#ifndef ENABLE_SMALL
static void
show_dhcp_option_addrs(const char *name, const in_addr_t *array, int len)
{
struct gc_arena gc = gc_new();
int i;
for (i = 0; i < len; ++i)
{
msg(D_SHOW_PARMS, " %s[%d] = %s",
name,
i,
print_in_addr_t(array[i], 0, &gc));
}
gc_free(&gc);
}
static void
show_tuntap_options(const struct tuntap_options *o)
{
SHOW_BOOL(ip_win32_defined);
SHOW_INT(ip_win32_type);
SHOW_INT(dhcp_masq_offset);
SHOW_INT(dhcp_lease_time);
SHOW_INT(tap_sleep);
SHOW_BOOL(dhcp_options);
SHOW_BOOL(dhcp_renew);
SHOW_BOOL(dhcp_pre_release);
SHOW_STR(domain);
SHOW_STR(netbios_scope);
SHOW_INT(netbios_node_type);
SHOW_BOOL(disable_nbt);
show_dhcp_option_addrs("DNS", o->dns, o->dns_len);
show_dhcp_option_addrs("WINS", o->wins, o->wins_len);
show_dhcp_option_addrs("NTP", o->ntp, o->ntp_len);
show_dhcp_option_addrs("NBDD", o->nbdd, o->nbdd_len);
}
#endif /* ifndef ENABLE_SMALL */
#endif /* ifdef _WIN32 */
#if defined(_WIN32) || defined(TARGET_ANDROID)
static void
dhcp_option_dns6_parse(const char *parm, struct in6_addr *dns6_list, int *len, int msglevel)
{
struct in6_addr addr;
if (*len >= N_DHCP_ADDR)
{
msg(msglevel, "--dhcp-option DNS: maximum of %d IPv6 dns servers can be specified",
N_DHCP_ADDR);
}
else if (get_ipv6_addr(parm, &addr, NULL, msglevel))
{
dns6_list[(*len)++] = addr;
}
}
static void
dhcp_option_address_parse(const char *name, const char *parm, in_addr_t *array, int *len, int msglevel)
{
if (*len >= N_DHCP_ADDR)
{
msg(msglevel, "--dhcp-option %s: maximum of %d %s servers can be specified",
name,
N_DHCP_ADDR,
name);
}
else
{
if (ip_addr_dotted_quad_safe(parm)) /* FQDN -- IP address only */
{
bool error = false;
const in_addr_t addr = get_ip_addr(parm, msglevel, &error);
if (!error)
{
array[(*len)++] = addr;
}
}
else
{
msg(msglevel, "dhcp-option parameter %s '%s' must be an IP address", name, parm);
}
}
}
#endif /* if defined(_WIN32) || defined(TARGET_ANDROID) */
#if P2MP
#ifndef ENABLE_SMALL
static void
show_p2mp_parms(const struct options *o)
{
struct gc_arena gc = gc_new();
#if P2MP_SERVER
msg(D_SHOW_PARMS, " server_network = %s", print_in_addr_t(o->server_network, 0, &gc));
msg(D_SHOW_PARMS, " server_netmask = %s", print_in_addr_t(o->server_netmask, 0, &gc));
msg(D_SHOW_PARMS, " server_network_ipv6 = %s", print_in6_addr(o->server_network_ipv6, 0, &gc) );
SHOW_INT(server_netbits_ipv6);
msg(D_SHOW_PARMS, " server_bridge_ip = %s", print_in_addr_t(o->server_bridge_ip, 0, &gc));
msg(D_SHOW_PARMS, " server_bridge_netmask = %s", print_in_addr_t(o->server_bridge_netmask, 0, &gc));
msg(D_SHOW_PARMS, " server_bridge_pool_start = %s", print_in_addr_t(o->server_bridge_pool_start, 0, &gc));
msg(D_SHOW_PARMS, " server_bridge_pool_end = %s", print_in_addr_t(o->server_bridge_pool_end, 0, &gc));
if (o->push_list.head)
{
const struct push_entry *e = o->push_list.head;
while (e)
{
if (e->enable)
{
msg(D_SHOW_PARMS, " push_entry = '%s'", e->option);
}
e = e->next;
}
}
SHOW_BOOL(ifconfig_pool_defined);
msg(D_SHOW_PARMS, " ifconfig_pool_start = %s", print_in_addr_t(o->ifconfig_pool_start, 0, &gc));
msg(D_SHOW_PARMS, " ifconfig_pool_end = %s", print_in_addr_t(o->ifconfig_pool_end, 0, &gc));
msg(D_SHOW_PARMS, " ifconfig_pool_netmask = %s", print_in_addr_t(o->ifconfig_pool_netmask, 0, &gc));
SHOW_STR(ifconfig_pool_persist_filename);
SHOW_INT(ifconfig_pool_persist_refresh_freq);
SHOW_BOOL(ifconfig_ipv6_pool_defined);
msg(D_SHOW_PARMS, " ifconfig_ipv6_pool_base = %s", print_in6_addr(o->ifconfig_ipv6_pool_base, 0, &gc));
SHOW_INT(ifconfig_ipv6_pool_netbits);
SHOW_INT(n_bcast_buf);
SHOW_INT(tcp_queue_limit);
SHOW_INT(real_hash_size);
SHOW_INT(virtual_hash_size);
SHOW_STR(client_connect_script);
SHOW_STR(learn_address_script);
SHOW_STR(client_disconnect_script);
SHOW_STR(client_config_dir);
SHOW_BOOL(ccd_exclusive);
SHOW_STR(tmp_dir);
SHOW_BOOL(push_ifconfig_defined);
msg(D_SHOW_PARMS, " push_ifconfig_local = %s", print_in_addr_t(o->push_ifconfig_local, 0, &gc));
msg(D_SHOW_PARMS, " push_ifconfig_remote_netmask = %s", print_in_addr_t(o->push_ifconfig_remote_netmask, 0, &gc));
SHOW_BOOL(push_ifconfig_ipv6_defined);
msg(D_SHOW_PARMS, " push_ifconfig_ipv6_local = %s/%d", print_in6_addr(o->push_ifconfig_ipv6_local, 0, &gc), o->push_ifconfig_ipv6_netbits );
msg(D_SHOW_PARMS, " push_ifconfig_ipv6_remote = %s", print_in6_addr(o->push_ifconfig_ipv6_remote, 0, &gc));
SHOW_BOOL(enable_c2c);
SHOW_BOOL(duplicate_cn);
SHOW_INT(cf_max);
SHOW_INT(cf_per);
SHOW_INT(max_clients);
SHOW_INT(max_routes_per_client);
SHOW_STR(auth_user_pass_verify_script);
SHOW_BOOL(auth_user_pass_verify_script_via_file);
SHOW_BOOL(auth_token_generate);
SHOW_INT(auth_token_lifetime);
#if PORT_SHARE
SHOW_STR(port_share_host);
SHOW_STR(port_share_port);
#endif
#endif /* P2MP_SERVER */
SHOW_BOOL(client);
SHOW_BOOL(pull);
SHOW_STR(auth_user_pass_file);
gc_free(&gc);
}
#endif /* ! ENABLE_SMALL */
#if P2MP_SERVER
static void
option_iroute(struct options *o,
const char *network_str,
const char *netmask_str,
int msglevel)
{
struct iroute *ir;
ALLOC_OBJ_GC(ir, struct iroute, &o->gc);
ir->network = getaddr(GETADDR_HOST_ORDER, network_str, 0, NULL, NULL);
ir->netbits = -1;
if (netmask_str)
{
const in_addr_t netmask = getaddr(GETADDR_HOST_ORDER, netmask_str, 0, NULL, NULL);
if (!netmask_to_netbits(ir->network, netmask, &ir->netbits))
{
msg(msglevel, "in --iroute %s %s : Bad network/subnet specification",
network_str,
netmask_str);
return;
}
}
ir->next = o->iroutes;
o->iroutes = ir;
}
static void
option_iroute_ipv6(struct options *o,
const char *prefix_str,
int msglevel)
{
struct iroute_ipv6 *ir;
ALLOC_OBJ_GC(ir, struct iroute_ipv6, &o->gc);
if (!get_ipv6_addr(prefix_str, &ir->network, &ir->netbits, msglevel ))
{
msg(msglevel, "in --iroute-ipv6 %s: Bad IPv6 prefix specification",
prefix_str);
return;
}
ir->next = o->iroutes_ipv6;
o->iroutes_ipv6 = ir;
}
#endif /* P2MP_SERVER */
#endif /* P2MP */
#ifndef ENABLE_SMALL
static void
show_http_proxy_options(const struct http_proxy_options *o)
{
int i;
msg(D_SHOW_PARMS, "BEGIN http_proxy");
SHOW_STR(server);
SHOW_STR(port);
SHOW_STR(auth_method_string);
SHOW_STR(auth_file);
SHOW_STR(http_version);
SHOW_STR(user_agent);
for (i = 0; i < MAX_CUSTOM_HTTP_HEADER && o->custom_headers[i].name; i++)
{
if (o->custom_headers[i].content)
{
msg(D_SHOW_PARMS, " custom_header[%d] = %s: %s", i,
o->custom_headers[i].name, o->custom_headers[i].content);
}
else
{
msg(D_SHOW_PARMS, " custom_header[%d] = %s", i,
o->custom_headers[i].name);
}
}
msg(D_SHOW_PARMS, "END http_proxy");
}
#endif /* ifndef ENABLE_SMALL */
void
options_detach(struct options *o)
{
gc_detach(&o->gc);
o->routes = NULL;
o->client_nat = NULL;
#if P2MP_SERVER
clone_push_list(o);
#endif
}
void
rol_check_alloc(struct options *options)
{
if (!options->routes)
{
options->routes = new_route_option_list(&options->gc);
}
}
static void
rol6_check_alloc(struct options *options)
{
if (!options->routes_ipv6)
{
options->routes_ipv6 = new_route_ipv6_option_list(&options->gc);
}
}
static void
cnol_check_alloc(struct options *options)
{
if (!options->client_nat)
{
options->client_nat = new_client_nat_list(&options->gc);
}
}
#ifndef ENABLE_SMALL
static void
show_connection_entry(const struct connection_entry *o)
{
msg(D_SHOW_PARMS, " proto = %s", proto2ascii(o->proto, o->af, false));
SHOW_STR(local);
SHOW_STR(local_port);
SHOW_STR(remote);
SHOW_STR(remote_port);
SHOW_BOOL(remote_float);
SHOW_BOOL(bind_defined);
SHOW_BOOL(bind_local);
SHOW_BOOL(bind_ipv6_only);
SHOW_INT(connect_retry_seconds);
SHOW_INT(connect_timeout);
if (o->http_proxy_options)
{
show_http_proxy_options(o->http_proxy_options);
}
SHOW_STR(socks_proxy_server);
SHOW_STR(socks_proxy_port);
SHOW_INT(tun_mtu);
SHOW_BOOL(tun_mtu_defined);
SHOW_INT(link_mtu);
SHOW_BOOL(link_mtu_defined);
SHOW_INT(tun_mtu_extra);
SHOW_BOOL(tun_mtu_extra_defined);
SHOW_INT(mtu_discover_type);
#ifdef ENABLE_FRAGMENT
SHOW_INT(fragment);
#endif
SHOW_INT(mssfix);
#ifdef ENABLE_OCC
SHOW_INT(explicit_exit_notification);
#endif
}
static void
show_connection_entries(const struct options *o)
{
if (o->connection_list)
{
const struct connection_list *l = o->connection_list;
int i;
for (i = 0; i < l->len; ++i)
{
msg(D_SHOW_PARMS, "Connection profiles [%d]:", i);
show_connection_entry(l->array[i]);
}
}
else
{
msg(D_SHOW_PARMS, "Connection profiles [default]:");
show_connection_entry(&o->ce);
}
msg(D_SHOW_PARMS, "Connection profiles END");
}
static void
show_pull_filter_list(const struct pull_filter_list *l)
{
struct pull_filter *f;
if (!l)
{
return;
}
msg(D_SHOW_PARMS, " Pull filters:");
for (f = l->head; f; f = f->next)
{
msg(D_SHOW_PARMS, " %s \"%s\"", pull_filter_type_name(f->type), f->pattern);
}
}
#endif /* ifndef ENABLE_SMALL */
void
show_settings(const struct options *o)
{
#ifndef ENABLE_SMALL
msg(D_SHOW_PARMS, "Current Parameter Settings:");
SHOW_STR(config);
SHOW_INT(mode);
#ifdef ENABLE_FEATURE_TUN_PERSIST
SHOW_BOOL(persist_config);
SHOW_INT(persist_mode);
#endif
SHOW_BOOL(show_ciphers);
SHOW_BOOL(show_digests);
SHOW_BOOL(show_engines);
SHOW_BOOL(genkey);
SHOW_STR(key_pass_file);
SHOW_BOOL(show_tls_ciphers);
SHOW_INT(connect_retry_max);
show_connection_entries(o);
SHOW_BOOL(remote_random);
SHOW_STR(ipchange);
SHOW_STR(dev);
SHOW_STR(dev_type);
SHOW_STR(dev_node);
SHOW_STR(lladdr);
SHOW_INT(topology);
SHOW_STR(ifconfig_local);
SHOW_STR(ifconfig_remote_netmask);
SHOW_BOOL(ifconfig_noexec);
SHOW_BOOL(ifconfig_nowarn);
SHOW_STR(ifconfig_ipv6_local);
SHOW_INT(ifconfig_ipv6_netbits);
SHOW_STR(ifconfig_ipv6_remote);
#ifdef ENABLE_FEATURE_SHAPER
SHOW_INT(shaper);
#endif
#ifdef ENABLE_OCC
SHOW_INT(mtu_test);
#endif
SHOW_BOOL(mlock);
SHOW_INT(keepalive_ping);
SHOW_INT(keepalive_timeout);
SHOW_INT(inactivity_timeout);
SHOW_INT(ping_send_timeout);
SHOW_INT(ping_rec_timeout);
SHOW_INT(ping_rec_timeout_action);
SHOW_BOOL(ping_timer_remote);
SHOW_INT(remap_sigusr1);
SHOW_BOOL(persist_tun);
SHOW_BOOL(persist_local_ip);
SHOW_BOOL(persist_remote_ip);
SHOW_BOOL(persist_key);
#if PASSTOS_CAPABILITY
SHOW_BOOL(passtos);
#endif
SHOW_INT(resolve_retry_seconds);
SHOW_BOOL(resolve_in_advance);
SHOW_STR(username);
SHOW_STR(groupname);
SHOW_STR(chroot_dir);
SHOW_STR(cd_dir);
#ifdef ENABLE_SELINUX
SHOW_STR(selinux_context);
#endif
SHOW_STR(writepid);
SHOW_STR(up_script);
SHOW_STR(down_script);
SHOW_BOOL(down_pre);
SHOW_BOOL(up_restart);
SHOW_BOOL(up_delay);
SHOW_BOOL(daemon);
SHOW_INT(inetd);
SHOW_BOOL(log);
SHOW_BOOL(suppress_timestamps);
SHOW_BOOL(machine_readable_output);
SHOW_INT(nice);
SHOW_INT(verbosity);
SHOW_INT(mute);
#ifdef ENABLE_DEBUG
SHOW_INT(gremlin);
#endif
SHOW_STR(status_file);
SHOW_INT(status_file_version);
SHOW_INT(status_file_update_freq);
#ifdef ENABLE_OCC
SHOW_BOOL(occ);
#endif
SHOW_INT(rcvbuf);
SHOW_INT(sndbuf);
#if defined(TARGET_LINUX) && HAVE_DECL_SO_MARK
SHOW_INT(mark);
#endif
SHOW_INT(sockflags);
SHOW_BOOL(fast_io);
#ifdef USE_COMP
SHOW_INT(comp.alg);
SHOW_INT(comp.flags);
#endif
SHOW_STR(route_script);
SHOW_STR(route_default_gateway);
SHOW_INT(route_default_metric);
SHOW_BOOL(route_noexec);
SHOW_INT(route_delay);
SHOW_INT(route_delay_window);
SHOW_BOOL(route_delay_defined);
SHOW_BOOL(route_nopull);
SHOW_BOOL(route_gateway_via_dhcp);
SHOW_BOOL(allow_pull_fqdn);
show_pull_filter_list(o->pull_filter_list);
if (o->routes)
{
print_route_options(o->routes, D_SHOW_PARMS);
}
if (o->client_nat)
{
print_client_nat_list(o->client_nat, D_SHOW_PARMS);
}
#ifdef ENABLE_MANAGEMENT
SHOW_STR(management_addr);
SHOW_STR(management_port);
SHOW_STR(management_user_pass);
SHOW_INT(management_log_history_cache);
SHOW_INT(management_echo_buffer_size);
SHOW_STR(management_write_peer_info_file);
SHOW_STR(management_client_user);
SHOW_STR(management_client_group);
SHOW_INT(management_flags);
#endif
#ifdef ENABLE_PLUGIN
if (o->plugin_list)
{
plugin_option_list_print(o->plugin_list, D_SHOW_PARMS);
}
#endif
SHOW_STR(shared_secret_file);
SHOW_PARM(key_direction, keydirection2ascii(o->key_direction, false, true), "%s");
SHOW_STR(ciphername);
SHOW_BOOL(ncp_enabled);
SHOW_STR(ncp_ciphers);
SHOW_STR(authname);
SHOW_STR(prng_hash);
SHOW_INT(prng_nonce_secret_len);
SHOW_INT(keysize);
#ifndef ENABLE_CRYPTO_MBEDTLS
SHOW_BOOL(engine);
#endif /* ENABLE_CRYPTO_MBEDTLS */
SHOW_BOOL(replay);
SHOW_BOOL(mute_replay_warnings);
SHOW_INT(replay_window);
SHOW_INT(replay_time);
SHOW_STR(packet_id_file);
SHOW_BOOL(test_crypto);
#ifdef ENABLE_PREDICTION_RESISTANCE
SHOW_BOOL(use_prediction_resistance);
#endif
SHOW_BOOL(tls_server);
SHOW_BOOL(tls_client);
SHOW_INT(key_method);
SHOW_STR(ca_file);
SHOW_STR(ca_path);
SHOW_STR(dh_file);
#ifdef MANAGMENT_EXTERNAL_KEY
if ((o->management_flags & MF_EXTERNAL_CERT))
{
SHOW_PARM("cert_file","EXTERNAL_CERT","%s");
}
else
#endif
SHOW_STR(cert_file);
SHOW_STR(extra_certs_file);
#ifdef MANAGMENT_EXTERNAL_KEY
if ((o->management_flags & MF_EXTERNAL_KEY))
{
SHOW_PARM("priv_key_file","EXTERNAL_PRIVATE_KEY","%s");
}
else
#endif
SHOW_STR(priv_key_file);
#ifndef ENABLE_CRYPTO_MBEDTLS
SHOW_STR(pkcs12_file);
#endif
#ifdef ENABLE_CRYPTOAPI
SHOW_STR(cryptoapi_cert);
#endif
SHOW_STR(cipher_list);
SHOW_STR(tls_cert_profile);
SHOW_STR(tls_verify);
SHOW_STR(tls_export_cert);
SHOW_INT(verify_x509_type);
SHOW_STR(verify_x509_name);
SHOW_STR(crl_file);
SHOW_INT(ns_cert_type);
{
int i;
for (i = 0; i<MAX_PARMS; i++)
{
SHOW_INT(remote_cert_ku[i]);
}
}
SHOW_STR(remote_cert_eku);
SHOW_INT(ssl_flags);
SHOW_INT(tls_timeout);
SHOW_INT(renegotiate_bytes);
SHOW_INT(renegotiate_packets);
SHOW_INT(renegotiate_seconds);
SHOW_INT(handshake_window);
SHOW_INT(transition_window);
SHOW_BOOL(single_session);
SHOW_BOOL(push_peer_info);
SHOW_BOOL(tls_exit);
SHOW_STR(tls_auth_file);
SHOW_STR(tls_crypt_file);
#ifdef ENABLE_PKCS11
{
int i;
for (i = 0; i<MAX_PARMS && o->pkcs11_providers[i] != NULL; i++)
{
SHOW_PARM(pkcs11_providers, o->pkcs11_providers[i], "%s");
}
}
{
int i;
for (i = 0; i<MAX_PARMS; i++)
{
SHOW_PARM(pkcs11_protected_authentication, o->pkcs11_protected_authentication[i] ? "ENABLED" : "DISABLED", "%s");
}
}
{
int i;
for (i = 0; i<MAX_PARMS; i++)
{
SHOW_PARM(pkcs11_private_mode, o->pkcs11_private_mode[i], "%08x");
}
}
{
int i;
for (i = 0; i<MAX_PARMS; i++)
{
SHOW_PARM(pkcs11_cert_private, o->pkcs11_cert_private[i] ? "ENABLED" : "DISABLED", "%s");
}
}
SHOW_INT(pkcs11_pin_cache_period);
SHOW_STR(pkcs11_id);
SHOW_BOOL(pkcs11_id_management);
#endif /* ENABLE_PKCS11 */
#if P2MP
show_p2mp_parms(o);
#endif
#ifdef _WIN32
SHOW_BOOL(show_net_up);
SHOW_INT(route_method);
SHOW_BOOL(block_outside_dns);
show_tuntap_options(&o->tuntap_options);
#endif
#endif /* ifndef ENABLE_SMALL */
}
#undef SHOW_PARM
#undef SHOW_STR
#undef SHOW_INT
#undef SHOW_BOOL
#ifdef ENABLE_MANAGEMENT
static struct http_proxy_options *
parse_http_proxy_override(const char *server,
const char *port,
const char *flags,
const int msglevel,
struct gc_arena *gc)
{
if (server && port)
{
struct http_proxy_options *ho;
ALLOC_OBJ_CLEAR_GC(ho, struct http_proxy_options, gc);
ho->server = string_alloc(server, gc);
ho->port = port;
if (flags && !strcmp(flags, "nct"))
{
ho->auth_retry = PAR_NCT;
}
else
{
ho->auth_retry = PAR_ALL;
}
ho->http_version = "1.0";
ho->user_agent = "OpenVPN-Autoproxy/1.0";
return ho;
}
else
{
return NULL;
}
}
static void
options_postprocess_http_proxy_override(struct options *o)
{
const struct connection_list *l = o->connection_list;
int i;
bool succeed = false;
for (i = 0; i < l->len; ++i)
{
struct connection_entry *ce = l->array[i];
if (ce->proto == PROTO_TCP_CLIENT || ce->proto == PROTO_TCP)
{
ce->http_proxy_options = o->http_proxy_override;
succeed = true;
}
}
if (succeed)
{
for (i = 0; i < l->len; ++i)
{
struct connection_entry *ce = l->array[i];
if (ce->proto == PROTO_UDP)
{
ce->flags |= CE_DISABLED;
}
}
}
else
{
msg(M_WARN, "Note: option http-proxy-override ignored because no TCP-based connection profiles are defined");
}
}
#endif /* ifdef ENABLE_MANAGEMENT */
static struct connection_list *
alloc_connection_list_if_undef(struct options *options)
{
if (!options->connection_list)
{
ALLOC_OBJ_CLEAR_GC(options->connection_list, struct connection_list, &options->gc);
}
return options->connection_list;
}
static struct connection_entry *
alloc_connection_entry(struct options *options, const int msglevel)
{
struct connection_list *l = alloc_connection_list_if_undef(options);
struct connection_entry *e;
if (l->len >= CONNECTION_LIST_SIZE)
{
msg(msglevel, "Maximum number of 'connection' options (%d) exceeded", CONNECTION_LIST_SIZE);
return NULL;
}
ALLOC_OBJ_GC(e, struct connection_entry, &options->gc);
l->array[l->len++] = e;
return e;
}
static struct remote_list *
alloc_remote_list_if_undef(struct options *options)
{
if (!options->remote_list)
{
ALLOC_OBJ_CLEAR_GC(options->remote_list, struct remote_list, &options->gc);
}
return options->remote_list;
}
static struct remote_entry *
alloc_remote_entry(struct options *options, const int msglevel)
{
struct remote_list *l = alloc_remote_list_if_undef(options);
struct remote_entry *e;
if (l->len >= CONNECTION_LIST_SIZE)
{
msg(msglevel, "Maximum number of 'remote' options (%d) exceeded", CONNECTION_LIST_SIZE);
return NULL;
}
ALLOC_OBJ_GC(e, struct remote_entry, &options->gc);
l->array[l->len++] = e;
return e;
}
static struct pull_filter_list *
alloc_pull_filter_list(struct options *o)
{
if (!o->pull_filter_list)
{
ALLOC_OBJ_CLEAR_GC(o->pull_filter_list, struct pull_filter_list, &o->gc);
}
return o->pull_filter_list;
}
static struct pull_filter *
alloc_pull_filter(struct options *o, const int msglevel)
{
struct pull_filter_list *l = alloc_pull_filter_list(o);
struct pull_filter *f;
ALLOC_OBJ_CLEAR_GC(f, struct pull_filter, &o->gc);
if (l->head)
{
ASSERT(l->tail);
l->tail->next = f;
}
else
{
ASSERT(!l->tail);
l->head = f;
}
l->tail = f;
return f;
}
static void
connection_entry_load_re(struct connection_entry *ce, const struct remote_entry *re)
{
if (re->remote)
{
ce->remote = re->remote;
}
if (re->remote_port)
{
ce->remote_port = re->remote_port;
}
if (re->proto >= 0)
{
ce->proto = re->proto;
}
if (re->af > 0)
{
ce->af = re->af;
}
}
static void
options_postprocess_verify_ce(const struct options *options, const struct connection_entry *ce)
{
struct options defaults;
int dev = DEV_TYPE_UNDEF;
bool pull = false;
init_options(&defaults, true);
if (options->test_crypto)
{
notnull(options->shared_secret_file, "key file (--secret)");
}
else
{
notnull(options->dev, "TUN/TAP device (--dev)");
}
/*
* Get tun/tap/null device type
*/
dev = dev_type_enum(options->dev, options->dev_type);
/*
* If "proto tcp" is specified, make sure we know whether it is
* tcp-client or tcp-server.
*/
if (ce->proto == PROTO_TCP)
{
msg(M_USAGE, "--proto tcp is ambiguous in this context. Please specify --proto tcp-server or --proto tcp-client");
}
/*
* Sanity check on daemon/inetd modes
*/
if (options->daemon && options->inetd)
{
msg(M_USAGE, "only one of --daemon or --inetd may be specified");
}
if (options->inetd && (ce->local || ce->remote))
{
msg(M_USAGE, "--local or --remote cannot be used with --inetd");
}
if (options->inetd && ce->proto == PROTO_TCP_CLIENT)
{
msg(M_USAGE, "--proto tcp-client cannot be used with --inetd");
}
if (options->inetd == INETD_NOWAIT && ce->proto != PROTO_TCP_SERVER)
{
msg(M_USAGE, "--inetd nowait can only be used with --proto tcp-server");
}
if (options->inetd == INETD_NOWAIT
&& !(options->tls_server || options->tls_client))
{
msg(M_USAGE, "--inetd nowait can only be used in TLS mode");
}
if (options->inetd == INETD_NOWAIT && dev != DEV_TYPE_TAP)
{
msg(M_USAGE, "--inetd nowait only makes sense in --dev tap mode");
}
if (options->lladdr && dev != DEV_TYPE_TAP)
{
msg(M_USAGE, "--lladdr can only be used in --dev tap mode");
}
/*
* Sanity check on MTU parameters
*/
if (options->ce.tun_mtu_defined && options->ce.link_mtu_defined)
{
msg(M_USAGE, "only one of --tun-mtu or --link-mtu may be defined (note that --ifconfig implies --link-mtu %d)", LINK_MTU_DEFAULT);
}
#ifdef ENABLE_OCC
if (!proto_is_udp(ce->proto) && options->mtu_test)
{
msg(M_USAGE, "--mtu-test only makes sense with --proto udp");
}
#endif
/* will we be pulling options from server? */
#if P2MP
pull = options->pull;
#endif
/*
* Sanity check on --local, --remote, and --ifconfig
*/
if (proto_is_net(ce->proto)
&& string_defined_equal(ce->local, ce->remote)
&& string_defined_equal(ce->local_port, ce->remote_port))
{
msg(M_USAGE, "--remote and --local addresses are the same");
}
if (string_defined_equal(ce->remote, options->ifconfig_local)
|| string_defined_equal(ce->remote, options->ifconfig_remote_netmask))
{
msg(M_USAGE, "--local and --remote addresses must be distinct from --ifconfig addresses");
}
if (string_defined_equal(ce->local, options->ifconfig_local)
|| string_defined_equal(ce->local, options->ifconfig_remote_netmask))
{
msg(M_USAGE, "--local addresses must be distinct from --ifconfig addresses");
}
if (string_defined_equal(options->ifconfig_local, options->ifconfig_remote_netmask))
{
msg(M_USAGE, "local and remote/netmask --ifconfig addresses must be different");
}
if (ce->bind_defined && !ce->bind_local)
{
msg(M_USAGE, "--bind and --nobind can't be used together");
}
if (ce->local && !ce->bind_local)
{
msg(M_USAGE, "--local and --nobind don't make sense when used together");
}
if (ce->local_port_defined && !ce->bind_local)
{
msg(M_USAGE, "--lport and --nobind don't make sense when used together");
}
if (!ce->remote && !ce->bind_local)
{
msg(M_USAGE, "--nobind doesn't make sense unless used with --remote");
}
/*
* Check for consistency of management options
*/
#ifdef ENABLE_MANAGEMENT
if (!options->management_addr
&& (options->management_flags
|| options->management_write_peer_info_file
|| options->management_log_history_cache != defaults.management_log_history_cache))
{
msg(M_USAGE, "--management is not specified, however one or more options which modify the behavior of --management were specified");
}
if ((options->management_client_user || options->management_client_group)
&& !(options->management_flags & MF_UNIX_SOCK))
{
msg(M_USAGE, "--management-client-(user|group) can only be used on unix domain sockets");
}
if (options->management_addr
&& !(options->management_flags & MF_UNIX_SOCK)
&& (!options->management_user_pass))
{
msg(M_WARN, "WARNING: Using --management on a TCP port WITHOUT "
"passwords is STRONGLY discouraged and considered insecure");
}
#endif
/*
* Windows-specific options.
*/
#ifdef _WIN32
if (dev == DEV_TYPE_TUN && !(pull || (options->ifconfig_local && options->ifconfig_remote_netmask)))
{
msg(M_USAGE, "On Windows, --ifconfig is required when --dev tun is used");
}
if ((options->tuntap_options.ip_win32_defined)
&& !(pull || (options->ifconfig_local && options->ifconfig_remote_netmask)))
{
msg(M_USAGE, "On Windows, --ip-win32 doesn't make sense unless --ifconfig is also used");
}
if (options->tuntap_options.dhcp_options
&& options->tuntap_options.ip_win32_type != IPW32_SET_DHCP_MASQ
&& options->tuntap_options.ip_win32_type != IPW32_SET_ADAPTIVE)
{
msg(M_USAGE, "--dhcp-options requires --ip-win32 dynamic or adaptive");
}
#endif
/*
* Check that protocol options make sense.
*/
#ifdef ENABLE_FRAGMENT
if (!proto_is_udp(ce->proto) && ce->fragment)
{
msg(M_USAGE, "--fragment can only be used with --proto udp");
}
#endif
#ifdef ENABLE_OCC
if (!proto_is_udp(ce->proto) && ce->explicit_exit_notification)
{
msg(M_USAGE, "--explicit-exit-notify can only be used with --proto udp");
}
#endif
if (!ce->remote && ce->proto == PROTO_TCP_CLIENT)
{
msg(M_USAGE, "--remote MUST be used in TCP Client mode");
}
if ((ce->http_proxy_options) && ce->proto != PROTO_TCP_CLIENT)
{
msg(M_USAGE, "--http-proxy MUST be used in TCP Client mode (i.e. --proto tcp-client)");
}
if ((ce->http_proxy_options) && !ce->http_proxy_options->server)
{
msg(M_USAGE, "--http-proxy not specified but other http proxy options present");
}
if (ce->http_proxy_options && ce->socks_proxy_server)
{
msg(M_USAGE, "--http-proxy can not be used together with --socks-proxy");
}
if (ce->socks_proxy_server && ce->proto == PROTO_TCP_SERVER)
{
msg(M_USAGE, "--socks-proxy can not be used in TCP Server mode");
}
if (ce->proto == PROTO_TCP_SERVER && (options->connection_list->len > 1))
{
msg(M_USAGE, "TCP server mode allows at most one --remote address");
}
#if P2MP_SERVER
/*
* Check consistency of --mode server options.
*/
if (options->mode == MODE_SERVER)
{
if (!(dev == DEV_TYPE_TUN || dev == DEV_TYPE_TAP))
{
msg(M_USAGE, "--mode server only works with --dev tun or --dev tap");
}
if (options->pull)
{
msg(M_USAGE, "--pull cannot be used with --mode server");
}
if (options->pull_filter_list)
{
msg(M_USAGE, "--pull-filter cannot be used with --mode server");
}
if (!(proto_is_udp(ce->proto) || ce->proto == PROTO_TCP_SERVER))
{
msg(M_USAGE, "--mode server currently only supports "
"--proto udp or --proto tcp-server or proto tcp6-server");
}
#if PORT_SHARE
if ((options->port_share_host || options->port_share_port)
&& (ce->proto != PROTO_TCP_SERVER))
{
msg(M_USAGE, "--port-share only works in TCP server mode "
"(--proto tcp-server or tcp6-server)");
}
#endif
if (!options->tls_server)
{
msg(M_USAGE, "--mode server requires --tls-server");
}
if (ce->remote)
{
msg(M_USAGE, "--remote cannot be used with --mode server");
}
if (!ce->bind_local)
{
msg(M_USAGE, "--nobind cannot be used with --mode server");
}
if (ce->http_proxy_options)
{
msg(M_USAGE, "--http-proxy cannot be used with --mode server");
}
if (ce->socks_proxy_server)
{
msg(M_USAGE, "--socks-proxy cannot be used with --mode server");
}
/* <connection> blocks force to have a remote embedded, so we check for the
* --remote and bail out if it is present */
if (options->connection_list->len >1
|| options->connection_list->array[0]->remote)
{
msg(M_USAGE, "<connection> cannot be used with --mode server");
}
if (options->shaper)
{
msg(M_USAGE, "--shaper cannot be used with --mode server");
}
if (options->inetd)
{
msg(M_USAGE, "--inetd cannot be used with --mode server");
}
if (options->ipchange)
{
msg(M_USAGE, "--ipchange cannot be used with --mode server (use --client-connect instead)");
}
if (!(proto_is_dgram(ce->proto) || ce->proto == PROTO_TCP_SERVER))
{
msg(M_USAGE, "--mode server currently only supports "
"--proto udp or --proto tcp-server or --proto tcp6-server");
}
if (!proto_is_udp(ce->proto) && (options->cf_max || options->cf_per))
{
msg(M_USAGE, "--connect-freq only works with --mode server --proto udp. Try --max-clients instead.");
}
if (!(dev == DEV_TYPE_TAP || (dev == DEV_TYPE_TUN && options->topology == TOP_SUBNET)) && options->ifconfig_pool_netmask)
{
msg(M_USAGE, "The third parameter to --ifconfig-pool (netmask) is only valid in --dev tap mode");
}
if (options->routes && (options->routes->flags & RG_ENABLE))
{
msg(M_USAGE, "--redirect-gateway cannot be used with --mode server (however --push \"redirect-gateway\" is fine)");
}
if (options->route_delay_defined)
{
msg(M_USAGE, "--route-delay cannot be used with --mode server");
}
if (options->up_delay)
{
msg(M_USAGE, "--up-delay cannot be used with --mode server");
}
if (!options->ifconfig_pool_defined && options->ifconfig_pool_persist_filename)
{
msg(M_USAGE, "--ifconfig-pool-persist must be used with --ifconfig-pool");
}
if (options->ifconfig_ipv6_pool_defined && !options->ifconfig_ipv6_local)
{
msg(M_USAGE, "--ifconfig-ipv6-pool needs --ifconfig-ipv6");
}
if (options->allow_recursive_routing)
{
msg(M_USAGE, "--allow-recursive-routing cannot be used with --mode server");
}
if (options->auth_user_pass_file)
{
msg(M_USAGE, "--auth-user-pass cannot be used with --mode server (it should be used on the client side only)");
}
if (options->ccd_exclusive && !options->client_config_dir)
{
msg(M_USAGE, "--ccd-exclusive must be used with --client-config-dir");
}
if (options->key_method != 2)
{
msg(M_USAGE, "--mode server requires --key-method 2");
}
{
const bool ccnr = (options->auth_user_pass_verify_script
|| PLUGIN_OPTION_LIST(options)
|| MAN_CLIENT_AUTH_ENABLED(options));
const char *postfix = "must be used with --management-client-auth, an --auth-user-pass-verify script, or plugin";
if ((options->ssl_flags & (SSLF_CLIENT_CERT_NOT_REQUIRED|SSLF_CLIENT_CERT_OPTIONAL)) && !ccnr)
{
msg(M_USAGE, "--verify-client-cert none|optional %s", postfix);
}
if ((options->ssl_flags & SSLF_USERNAME_AS_COMMON_NAME) && !ccnr)
{
msg(M_USAGE, "--username-as-common-name %s", postfix);
}
if ((options->ssl_flags & SSLF_AUTH_USER_PASS_OPTIONAL) && !ccnr)
{
msg(M_USAGE, "--auth-user-pass-optional %s", postfix);
}
}
}
else
{
/*
* When not in server mode, err if parameters are
* specified which require --mode server.
*/
if (options->ifconfig_pool_defined || options->ifconfig_pool_persist_filename)
{
msg(M_USAGE, "--ifconfig-pool/--ifconfig-pool-persist requires --mode server");
}
if (options->ifconfig_ipv6_pool_defined)
{
msg(M_USAGE, "--ifconfig-ipv6-pool requires --mode server");
}
if (options->real_hash_size != defaults.real_hash_size
|| options->virtual_hash_size != defaults.virtual_hash_size)
{
msg(M_USAGE, "--hash-size requires --mode server");
}
if (options->learn_address_script)
{
msg(M_USAGE, "--learn-address requires --mode server");
}
if (options->client_connect_script)
{
msg(M_USAGE, "--client-connect requires --mode server");
}
if (options->client_disconnect_script)
{
msg(M_USAGE, "--client-disconnect requires --mode server");
}
if (options->client_config_dir || options->ccd_exclusive)
{
msg(M_USAGE, "--client-config-dir/--ccd-exclusive requires --mode server");
}
if (options->enable_c2c)
{
msg(M_USAGE, "--client-to-client requires --mode server");
}
if (options->duplicate_cn)
{
msg(M_USAGE, "--duplicate-cn requires --mode server");
}
if (options->cf_max || options->cf_per)
{
msg(M_USAGE, "--connect-freq requires --mode server");
}
if (options->ssl_flags & (SSLF_CLIENT_CERT_NOT_REQUIRED|SSLF_CLIENT_CERT_OPTIONAL))
{
msg(M_USAGE, "--client-cert-not-required and --verify-client-cert require --mode server");
}
if (options->ssl_flags & SSLF_USERNAME_AS_COMMON_NAME)
{
msg(M_USAGE, "--username-as-common-name requires --mode server");
}
if (options->ssl_flags & SSLF_AUTH_USER_PASS_OPTIONAL)
{
msg(M_USAGE, "--auth-user-pass-optional requires --mode server");
}
if (options->ssl_flags & SSLF_OPT_VERIFY)
{
msg(M_USAGE, "--opt-verify requires --mode server");
}
if (options->server_flags & SF_TCP_NODELAY_HELPER)
{
msg(M_WARN, "WARNING: setting tcp-nodelay on the client side will not "
"affect the server. To have TCP_NODELAY in both direction use "
"tcp-nodelay in the server configuration instead.");
}
if (options->auth_user_pass_verify_script)
{
msg(M_USAGE, "--auth-user-pass-verify requires --mode server");
}
if (options->auth_token_generate)
{
msg(M_USAGE, "--auth-gen-token requires --mode server");
}
#if PORT_SHARE
if (options->port_share_host || options->port_share_port)
{
msg(M_USAGE, "--port-share requires TCP server mode (--mode server --proto tcp-server)");
}
#endif
if (options->stale_routes_check_interval)
{
msg(M_USAGE, "--stale-routes-check requires --mode server");
}
if (compat_flag(COMPAT_FLAG_QUERY | COMPAT_NO_NAME_REMAPPING))
{
msg(M_USAGE, "--compat-x509-names no-remapping requires --mode server");
}
}
#endif /* P2MP_SERVER */
if (options->ncp_enabled && !tls_check_ncp_cipher_list(options->ncp_ciphers))
{
msg(M_USAGE, "NCP cipher list contains unsupported ciphers.");
}
if (options->keysize)
{
msg(M_WARN, "WARNING: --keysize is DEPRECATED and will be removed in OpenVPN 2.6");
}
/*
* Check consistency of replay options
*/
if (!options->replay
&& (options->replay_window != defaults.replay_window
|| options->replay_time != defaults.replay_time))
{
msg(M_USAGE, "--replay-window doesn't make sense when replay protection is disabled with --no-replay");
}
/*
* SSL/TLS mode sanity checks.
*/
if (options->tls_server + options->tls_client
+(options->shared_secret_file != NULL) > 1)
{
msg(M_USAGE, "specify only one of --tls-server, --tls-client, or --secret");
}
if (options->ssl_flags & (SSLF_CLIENT_CERT_NOT_REQUIRED|SSLF_CLIENT_CERT_OPTIONAL))
{
msg(M_WARN, "WARNING: POTENTIALLY DANGEROUS OPTION "
"--verify-client-cert none|optional (or --client-cert-not-required) "
"may accept clients which do not present a certificate");
}
if (options->key_method == 1)
{
msg(M_WARN, "WARNING: --key-method 1 is deprecated and will be removed "
"in OpenVPN 2.5. By default --key-method 2 will be used if not set "
"in the configuration file, which is the recommended approach.");
}
const int tls_version_max =
(options->ssl_flags >> SSLF_TLS_VERSION_MAX_SHIFT)
& SSLF_TLS_VERSION_MAX_MASK;
const int tls_version_min =
(options->ssl_flags >> SSLF_TLS_VERSION_MIN_SHIFT)
& SSLF_TLS_VERSION_MIN_MASK;
if (tls_version_max > 0 && tls_version_max < tls_version_min)
{
msg(M_USAGE, "--tls-version-min bigger than --tls-version-max");
}
if (options->tls_server || options->tls_client)
{
#ifdef ENABLE_PKCS11
if (options->pkcs11_providers[0])
{
notnull(options->ca_file, "CA file (--ca)");
if (options->pkcs11_id_management && options->pkcs11_id != NULL)
{
msg(M_USAGE, "Parameter --pkcs11-id cannot be used when --pkcs11-id-management is also specified.");
}
if (!options->pkcs11_id_management && options->pkcs11_id == NULL)
{
msg(M_USAGE, "Parameter --pkcs11-id or --pkcs11-id-management should be specified.");
}
if (options->cert_file)
{
msg(M_USAGE, "Parameter --cert cannot be used when --pkcs11-provider is also specified.");
}
if (options->priv_key_file)
{
msg(M_USAGE, "Parameter --key cannot be used when --pkcs11-provider is also specified.");
}
#ifdef MANAGMENT_EXTERNAL_KEY
if (options->management_flags & MF_EXTERNAL_KEY)
{
msg(M_USAGE, "Parameter --management-external-key cannot be used when --pkcs11-provider is also specified.");
}
if (options->management_flags & MF_EXTERNAL_CERT)
{
msg(M_USAGE, "Parameter --management-external-cert cannot be used when --pkcs11-provider is also specified.");
}
#endif
if (options->pkcs12_file)
{
msg(M_USAGE, "Parameter --pkcs12 cannot be used when --pkcs11-provider is also specified.");
}
#ifdef ENABLE_CRYPTOAPI
if (options->cryptoapi_cert)
{
msg(M_USAGE, "Parameter --cryptoapicert cannot be used when --pkcs11-provider is also specified.");
}
#endif
}
else
#endif /* ifdef ENABLE_PKCS11 */
#ifdef MANAGMENT_EXTERNAL_KEY
if ((options->management_flags & MF_EXTERNAL_KEY) && options->priv_key_file)
{
msg(M_USAGE, "--key and --management-external-key are mutually exclusive");
}
else if ((options->management_flags & MF_EXTERNAL_CERT))
{
if (options->cert_file)
{
msg(M_USAGE, "--cert and --management-external-cert are mutually exclusive");
}
else if (!(options->management_flags & MF_EXTERNAL_KEY))
{
msg(M_USAGE, "--management-external-cert must be used with --management-external-key");
}
}
else
#endif
#ifdef ENABLE_CRYPTOAPI
if (options->cryptoapi_cert)
{
if ((!(options->ca_file)) && (!(options->ca_path)))
{
msg(M_USAGE, "You must define CA file (--ca) or CA path (--capath)");
}
if (options->cert_file)
{
msg(M_USAGE, "Parameter --cert cannot be used when --cryptoapicert is also specified.");
}
if (options->priv_key_file)
{
msg(M_USAGE, "Parameter --key cannot be used when --cryptoapicert is also specified.");
}
if (options->pkcs12_file)
{
msg(M_USAGE, "Parameter --pkcs12 cannot be used when --cryptoapicert is also specified.");
}
#ifdef MANAGMENT_EXTERNAL_KEY
if (options->management_flags & MF_EXTERNAL_KEY)
{
msg(M_USAGE, "Parameter --management-external-key cannot be used when --cryptoapicert is also specified.");
}
if (options->management_flags & MF_EXTERNAL_CERT)
{
msg(M_USAGE, "Parameter --management-external-cert cannot be used when --cryptoapicert is also specified.");
}
#endif
}
else
#endif /* ifdef ENABLE_CRYPTOAPI */
if (options->pkcs12_file)
{
#ifdef ENABLE_CRYPTO_MBEDTLS
msg(M_USAGE, "Parameter --pkcs12 cannot be used with the mbed TLS version version of OpenVPN.");
#else
if (options->ca_path)
{
msg(M_USAGE, "Parameter --capath cannot be used when --pkcs12 is also specified.");
}
if (options->cert_file)
{
msg(M_USAGE, "Parameter --cert cannot be used when --pkcs12 is also specified.");
}
if (options->priv_key_file)
{
msg(M_USAGE, "Parameter --key cannot be used when --pkcs12 is also specified.");
}
#ifdef MANAGMENT_EXTERNAL_KEY
if (options->management_flags & MF_EXTERNAL_KEY)
{
msg(M_USAGE, "Parameter --management-external-key cannot be used when --pkcs12 is also specified.");
}
if (options->management_flags & MF_EXTERNAL_CERT)
{
msg(M_USAGE, "Parameter --management-external-cert cannot be used when --pkcs12 is also specified.");
}
#endif
#endif /* ifdef ENABLE_CRYPTO_MBEDTLS */
}
else
{
#ifdef ENABLE_CRYPTO_MBEDTLS
if (!(options->ca_file))
{
msg(M_USAGE, "You must define CA file (--ca)");
}
if (options->ca_path)
{
msg(M_USAGE, "Parameter --capath cannot be used with the mbed TLS version version of OpenVPN.");
}
#else /* ifdef ENABLE_CRYPTO_MBEDTLS */
if ((!(options->ca_file)) && (!(options->ca_path)))
{
msg(M_USAGE, "You must define CA file (--ca) or CA path (--capath)");
}
#endif
if (pull)
{
const int sum =
#ifdef MANAGMENT_EXTERNAL_KEY
((options->cert_file != NULL) || (options->management_flags & MF_EXTERNAL_CERT))
+((options->priv_key_file != NULL) || (options->management_flags & MF_EXTERNAL_KEY));
#else
(options->cert_file != NULL) + (options->priv_key_file != NULL);
#endif
if (sum == 0)
{
#if P2MP
if (!options->auth_user_pass_file)
#endif
msg(M_USAGE, "No client-side authentication method is specified. You must use either --cert/--key, --pkcs12, or --auth-user-pass");
}
else if (sum == 2)
{
}
else
{
msg(M_USAGE, "If you use one of --cert or --key, you must use them both");
}
}
else
{
#ifdef MANAGMENT_EXTERNAL_KEY
if (!(options->management_flags & MF_EXTERNAL_CERT))
#endif
notnull(options->cert_file, "certificate file (--cert) or PKCS#12 file (--pkcs12)");
#ifdef MANAGMENT_EXTERNAL_KEY
if (!(options->management_flags & MF_EXTERNAL_KEY))
#endif
notnull(options->priv_key_file, "private key file (--key) or PKCS#12 file (--pkcs12)");
}
}
if (options->tls_auth_file && options->tls_crypt_file)
{
msg(M_USAGE, "--tls-auth and --tls-crypt are mutually exclusive");
}
}
else
{
/*
* Make sure user doesn't specify any TLS options
* when in non-TLS mode.
*/
#define MUST_BE_UNDEF(parm) if (options->parm != defaults.parm) {msg(M_USAGE, err, #parm); \
}
const char err[] = "Parameter %s can only be specified in TLS-mode, i.e. where --tls-server or --tls-client is also specified.";
MUST_BE_UNDEF(ca_file);
MUST_BE_UNDEF(ca_path);
MUST_BE_UNDEF(dh_file);
MUST_BE_UNDEF(cert_file);
MUST_BE_UNDEF(priv_key_file);
#ifndef ENABLE_CRYPTO_MBEDTLS
MUST_BE_UNDEF(pkcs12_file);
#endif
MUST_BE_UNDEF(cipher_list);
MUST_BE_UNDEF(tls_cert_profile);
MUST_BE_UNDEF(tls_verify);
MUST_BE_UNDEF(tls_export_cert);
MUST_BE_UNDEF(verify_x509_name);
MUST_BE_UNDEF(tls_timeout);
MUST_BE_UNDEF(renegotiate_bytes);
MUST_BE_UNDEF(renegotiate_packets);
MUST_BE_UNDEF(renegotiate_seconds);
MUST_BE_UNDEF(handshake_window);
MUST_BE_UNDEF(transition_window);
MUST_BE_UNDEF(tls_auth_file);
MUST_BE_UNDEF(tls_crypt_file);
MUST_BE_UNDEF(single_session);
MUST_BE_UNDEF(push_peer_info);
MUST_BE_UNDEF(tls_exit);
MUST_BE_UNDEF(crl_file);
MUST_BE_UNDEF(key_method);
MUST_BE_UNDEF(ns_cert_type);
MUST_BE_UNDEF(remote_cert_ku[0]);
MUST_BE_UNDEF(remote_cert_eku);
#ifdef ENABLE_PKCS11
MUST_BE_UNDEF(pkcs11_providers[0]);
MUST_BE_UNDEF(pkcs11_private_mode[0]);
MUST_BE_UNDEF(pkcs11_id);
MUST_BE_UNDEF(pkcs11_id_management);
#endif
if (pull)
{
msg(M_USAGE, err, "--pull");
}
}
#undef MUST_BE_UNDEF
#if P2MP
if (options->auth_user_pass_file && !options->pull)
{
msg(M_USAGE, "--auth-user-pass requires --pull");
}
#endif
uninit_options(&defaults);
}
static void
options_postprocess_mutate_ce(struct options *o, struct connection_entry *ce)
{
const int dev = dev_type_enum(o->dev, o->dev_type);
#if P2MP_SERVER
if (o->server_defined || o->server_bridge_defined || o->server_bridge_proxy_dhcp)
{
if (ce->proto == PROTO_TCP)
{
ce->proto = PROTO_TCP_SERVER;
}
}
#endif
#if P2MP
if (o->client)
{
if (ce->proto == PROTO_TCP)
{
ce->proto = PROTO_TCP_CLIENT;
}
}
#endif
if (ce->proto == PROTO_TCP_CLIENT && !ce->local && !ce->local_port_defined && !ce->bind_defined)
{
ce->bind_local = false;
}
if (ce->proto == PROTO_UDP && ce->socks_proxy_server && !ce->local && !ce->local_port_defined && !ce->bind_defined)
{
ce->bind_local = false;
}
if (!ce->bind_local)
{
ce->local_port = NULL;
}
/* if protocol forcing is enabled, disable all protocols except for the forced one */
if (o->proto_force >= 0 && o->proto_force != ce->proto)
{
ce->flags |= CE_DISABLED;
}
/*
* If --mssfix is supplied without a parameter, default
* it to --fragment value, if --fragment is specified.
*/
if (o->ce.mssfix_default)
{
#ifdef ENABLE_FRAGMENT
if (ce->fragment)
{
ce->mssfix = ce->fragment;
}
#else
msg(M_USAGE, "--mssfix must specify a parameter");
#endif
}
/*
* Set MTU defaults
*/
{
if (!ce->tun_mtu_defined && !ce->link_mtu_defined)
{
ce->tun_mtu_defined = true;
}
if ((dev == DEV_TYPE_TAP) && !ce->tun_mtu_extra_defined)
{
ce->tun_mtu_extra_defined = true;
ce->tun_mtu_extra = TAP_MTU_EXTRA_DEFAULT;
}
}
}
#ifdef _WIN32
/* If iservice is in use, we need def1 method for redirect-gateway */
static void
remap_redirect_gateway_flags(struct options *opt)
{
if (opt->routes
&& opt->route_method == ROUTE_METHOD_SERVICE
&& opt->routes->flags & RG_REROUTE_GW
&& !(opt->routes->flags & RG_DEF1))
{
msg(M_INFO, "Flag 'def1' added to --redirect-gateway (iservice is in use)");
opt->routes->flags |= RG_DEF1;
}
}
#endif
static void
options_postprocess_mutate_invariant(struct options *options)
{
#ifdef _WIN32
const int dev = dev_type_enum(options->dev, options->dev_type);
#endif
/*
* In forking TCP server mode, you don't need to ifconfig
* the tap device (the assumption is that it will be bridged).
*/
if (options->inetd == INETD_NOWAIT)
{
options->ifconfig_noexec = true;
}
#ifdef _WIN32
if ((dev == DEV_TYPE_TUN || dev == DEV_TYPE_TAP) && !options->route_delay_defined)
{
if (options->mode == MODE_POINT_TO_POINT)
{
options->route_delay_defined = true;
options->route_delay = 5; /* Vista sometimes has a race without this */
}
}
if (options->ifconfig_noexec)
{
options->tuntap_options.ip_win32_type = IPW32_SET_MANUAL;
options->ifconfig_noexec = false;
}
remap_redirect_gateway_flags(options);
#endif
#if P2MP_SERVER
/*
* Check consistency of --mode server options.
*/
if (options->mode == MODE_SERVER)
{
#ifdef _WIN32
/*
* We need to explicitly set --tap-sleep because
* we do not schedule event timers in the top-level context.
*/
options->tuntap_options.tap_sleep = 10;
if (options->route_delay_defined && options->route_delay)
{
options->tuntap_options.tap_sleep = options->route_delay;
}
options->route_delay_defined = false;
#endif
}
#endif
#ifdef DEFAULT_PKCS11_MODULE
/* If p11-kit is present on the system then load its p11-kit-proxy.so
* by default if the user asks for PKCS#11 without otherwise specifying
* the module to use. */
if (!options->pkcs11_providers[0]
&& (options->pkcs11_id || options->pkcs11_id_management))
{
options->pkcs11_providers[0] = DEFAULT_PKCS11_MODULE;
}
#endif
}
static void
options_postprocess_verify(const struct options *o)
{
if (o->connection_list)
{
int i;
for (i = 0; i < o->connection_list->len; ++i)
{
options_postprocess_verify_ce(o, o->connection_list->array[i]);
}
}
else
{
options_postprocess_verify_ce(o, &o->ce);
}
}
static void
options_postprocess_mutate(struct options *o)
{
int i;
/*
* Process helper-type options which map to other, more complex
* sequences of options.
*/
helper_client_server(o);
helper_keepalive(o);
helper_tcp_nodelay(o);
options_postprocess_mutate_invariant(o);
if (o->remote_list && !o->connection_list)
{
/*
* Convert remotes into connection list
*/
const struct remote_list *rl = o->remote_list;
for (i = 0; i < rl->len; ++i)
{
const struct remote_entry *re = rl->array[i];
struct connection_entry ce = o->ce;
struct connection_entry *ace;
ASSERT(re->remote);
connection_entry_load_re(&ce, re);
ace = alloc_connection_entry(o, M_USAGE);
ASSERT(ace);
*ace = ce;
}
}
else if (!o->remote_list && !o->connection_list)
{
struct connection_entry *ace;
ace = alloc_connection_entry(o, M_USAGE);
ASSERT(ace);
*ace = o->ce;
}
ASSERT(o->connection_list);
for (i = 0; i < o->connection_list->len; ++i)
{
options_postprocess_mutate_ce(o, o->connection_list->array[i]);
}
if (o->tls_server)
{
/* Check that DH file is specified, or explicitly disabled */
notnull(o->dh_file, "DH file (--dh)");
if (streq(o->dh_file, "none"))
{
o->dh_file = NULL;
}
}
else if (o->dh_file)
{
/* DH file is only meaningful in a tls-server context. */
msg(M_WARN, "WARNING: Ignoring option 'dh' in tls-client mode, please only "
"include this in your server configuration");
o->dh_file = NULL;
}
/* cipher negotiation (NCP) currently assumes --pull or --mode server */
if (o->ncp_enabled
&& !(o->pull || o->mode == MODE_SERVER) )
{
msg( M_WARN, "disabling NCP mode (--ncp-disable) because not "
"in P2MP client or server mode" );
o->ncp_enabled = false;
}
#if ENABLE_MANAGEMENT
if (o->http_proxy_override)
{
options_postprocess_http_proxy_override(o);
}
#endif
#if P2MP
/*
* Save certain parms before modifying options via --pull
*/
pre_pull_save(o);
#endif
}
/*
* Check file/directory sanity
*
*/
#ifndef ENABLE_SMALL /** Expect people using the stripped down version to know what they do */
#define CHKACC_FILE (1<<0) /** Check for a file/directory precense */
#define CHKACC_DIRPATH (1<<1) /** Check for directory precense where a file should reside */
#define CHKACC_FILEXSTWR (1<<2) /** If file exists, is it writable? */
#define CHKACC_INLINE (1<<3) /** File is present if it's an inline file */
#define CHKACC_ACPTSTDIN (1<<4) /** If filename is stdin, it's allowed and "exists" */
#define CHKACC_PRIVATE (1<<5) /** Warn if this (private) file is group/others accessible */
static bool
check_file_access(const int type, const char *file, const int mode, const char *opt)
{
int errcode = 0;
/* If no file configured, no errors to look for */
if (!file)
{
return false;
}
/* If this may be an inline file, and the proper inline "filename" is set - no issues */
if ((type & CHKACC_INLINE) && streq(file, INLINE_FILE_TAG) )
{
return false;
}
/* If stdin is allowed and the file name is 'stdin', then do no
* further checks as stdin is always available
*/
if ( (type & CHKACC_ACPTSTDIN) && streq(file, "stdin") )
{
return false;
}
/* Is the directory path leading to the given file accessible? */
if (type & CHKACC_DIRPATH)
{
char *fullpath = string_alloc(file, NULL); /* POSIX dirname() implementaion may modify its arguments */
char *dirpath = dirname(fullpath);
if (platform_access(dirpath, mode|X_OK) != 0)
{
errcode = errno;
}
free(fullpath);
}
/* Is the file itself accessible? */
if (!errcode && (type & CHKACC_FILE) && (platform_access(file, mode) != 0) )
{
errcode = errno;
}
/* If the file exists and is accessible, is it writable? */
if (!errcode && (type & CHKACC_FILEXSTWR) && (platform_access(file, F_OK) == 0) )
{
if (platform_access(file, W_OK) != 0)
{
errcode = errno;
}
}
/* Warn if a given private file is group/others accessible. */
if (type & CHKACC_PRIVATE)
{
platform_stat_t st;
if (platform_stat(file, &st))
{
msg(M_WARN | M_ERRNO, "WARNING: cannot stat file '%s'", file);
}
#ifndef _WIN32
else
{
if (st.st_mode & (S_IRWXG|S_IRWXO))
{
msg(M_WARN, "WARNING: file '%s' is group or others accessible", file);
}
}
#endif
}
/* Scream if an error is found */
if (errcode > 0)
{
msg(M_NOPREFIX | M_OPTERR | M_ERRNO, "%s fails with '%s'", opt, file);
}
/* Return true if an error occured */
return (errcode != 0 ? true : false);
}
/* A wrapper for check_file_access() which also takes a chroot directory.
* If chroot is NULL, behaviour is exactly the same as calling check_file_access() directly,
* otherwise it will look for the file inside the given chroot directory instead.
*/
static bool
check_file_access_chroot(const char *chroot, const int type, const char *file, const int mode, const char *opt)
{
bool ret = false;
/* If no file configured, no errors to look for */
if (!file)
{
return false;
}
/* If chroot is set, look for the file/directory inside the chroot */
if (chroot)
{
struct gc_arena gc = gc_new();
struct buffer chroot_file;
int len = 0;
/* Build up a new full path including chroot directory */
len = strlen(chroot) + strlen(PATH_SEPARATOR_STR) + strlen(file) + 1;
chroot_file = alloc_buf_gc(len, &gc);
buf_printf(&chroot_file, "%s%s%s", chroot, PATH_SEPARATOR_STR, file);
ASSERT(chroot_file.len > 0);
ret = check_file_access(type, BSTR(&chroot_file), mode, opt);
gc_free(&gc);
}
else
{
/* No chroot in play, just call core file check function */
ret = check_file_access(type, file, mode, opt);
}
return ret;
}
/*
* Verifies that the path in the "command" that comes after certain script options (e.g., --up) is a
* valid file with appropriate permissions.
*
* "command" consists of a path, optionally followed by a space, which may be
* followed by arbitrary arguments. It is NOT a full shell command line -- shell expansion is not
* performed.
*
* The path and arguments in "command" may be single- or double-quoted or escaped.
*
* The path is extracted from "command", then check_file_access() is called to check it. The
* arguments, if any, are ignored.
*
* Note that the type, mode, and opt arguments to this routine are the same as the corresponding
* check_file_access() arguments.
*/
static bool
check_cmd_access(const char *command, const char *opt, const char *chroot)
{
struct argv argv;
bool return_code;
/* If no command was set, there are no errors to look for */
if (!command)
{
return false;
}
/* Extract executable path and arguments */
argv = argv_new();
argv_parse_cmd(&argv, command);
/* if an executable is specified then check it; otherwise, complain */
if (argv.argv[0])
{
/* Scripts requires R_OK as well, but that might fail on binaries which
* only requires X_OK to function on Unix - a scenario not unlikely to
* be seen on suid binaries.
*/
return_code = check_file_access_chroot(chroot, CHKACC_FILE, argv.argv[0], X_OK, opt);
}
else
{
msg(M_NOPREFIX|M_OPTERR, "%s fails with '%s': No path to executable.",
opt, command);
return_code = true;
}
argv_reset(&argv);
return return_code;
}
/*
* Sanity check of all file/dir options. Checks that file/dir
* is accessible by OpenVPN
*/
static void
options_postprocess_filechecks(struct options *options)
{
bool errs = false;
/* ** SSL/TLS/crypto related files ** */
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE, options->dh_file, R_OK, "--dh");
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE, options->ca_file, R_OK, "--ca");
errs |= check_file_access_chroot(options->chroot_dir, CHKACC_FILE, options->ca_path, R_OK, "--capath");
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE, options->cert_file, R_OK, "--cert");
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE, options->extra_certs_file, R_OK,
"--extra-certs");
#ifdef MANAGMENT_EXTERNAL_KEY
if (!(options->management_flags & MF_EXTERNAL_KEY))
#endif
{
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE|CHKACC_PRIVATE,
options->priv_key_file, R_OK, "--key");
}
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE|CHKACC_PRIVATE,
options->pkcs12_file, R_OK, "--pkcs12");
if (options->ssl_flags & SSLF_CRL_VERIFY_DIR)
{
errs |= check_file_access_chroot(options->chroot_dir, CHKACC_FILE, options->crl_file, R_OK|X_OK,
"--crl-verify directory");
}
else
{
errs |= check_file_access_chroot(options->chroot_dir, CHKACC_FILE|CHKACC_INLINE,
options->crl_file, R_OK, "--crl-verify");
}
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE|CHKACC_PRIVATE,
options->tls_auth_file, R_OK, "--tls-auth");
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE|CHKACC_PRIVATE,
options->tls_crypt_file, R_OK, "--tls-crypt");
errs |= check_file_access(CHKACC_FILE|CHKACC_INLINE|CHKACC_PRIVATE,
options->shared_secret_file, R_OK, "--secret");
errs |= check_file_access(CHKACC_DIRPATH|CHKACC_FILEXSTWR,
options->packet_id_file, R_OK|W_OK, "--replay-persist");
/* ** Password files ** */
errs |= check_file_access(CHKACC_FILE|CHKACC_ACPTSTDIN|CHKACC_PRIVATE,
options->key_pass_file, R_OK, "--askpass");
#ifdef ENABLE_MANAGEMENT
errs |= check_file_access(CHKACC_FILE|CHKACC_ACPTSTDIN|CHKACC_PRIVATE,
options->management_user_pass, R_OK,
"--management user/password file");
#endif /* ENABLE_MANAGEMENT */
#if P2MP
errs |= check_file_access(CHKACC_FILE|CHKACC_ACPTSTDIN|CHKACC_PRIVATE,
options->auth_user_pass_file, R_OK,
"--auth-user-pass");
#endif /* P2MP */
/* ** System related ** */
errs |= check_file_access(CHKACC_FILE, options->chroot_dir,
R_OK|X_OK, "--chroot directory");
errs |= check_file_access(CHKACC_DIRPATH|CHKACC_FILEXSTWR, options->writepid,
R_OK|W_OK, "--writepid");
/* ** Log related ** */
errs |= check_file_access(CHKACC_DIRPATH|CHKACC_FILEXSTWR, options->status_file,
R_OK|W_OK, "--status");
/* ** Config related ** */
errs |= check_file_access_chroot(options->chroot_dir, CHKACC_FILE, options->tls_export_cert,
R_OK|W_OK|X_OK, "--tls-export-cert");
#if P2MP_SERVER
errs |= check_file_access_chroot(options->chroot_dir, CHKACC_FILE, options->client_config_dir,
R_OK|X_OK, "--client-config-dir");
errs |= check_file_access_chroot(options->chroot_dir, CHKACC_FILE, options->tmp_dir,
R_OK|W_OK|X_OK, "Temporary directory (--tmp-dir)");
#endif /* P2MP_SERVER */
if (errs)
{
msg(M_USAGE, "Please correct these errors.");
}
}
#endif /* !ENABLE_SMALL */
/*
* Sanity check on options.
* Also set some options based on other
* options.
*/
void
options_postprocess(struct options *options)
{
options_postprocess_mutate(options);
options_postprocess_verify(options);
#ifndef ENABLE_SMALL
options_postprocess_filechecks(options);
#endif /* !ENABLE_SMALL */
}
#if P2MP
/*
* Save/Restore certain option defaults before --pull is applied.
*/
void
pre_pull_save(struct options *o)
{
if (o->pull)
{
ALLOC_OBJ_CLEAR_GC(o->pre_pull, struct options_pre_pull, &o->gc);
o->pre_pull->tuntap_options = o->tuntap_options;
o->pre_pull->tuntap_options_defined = true;
o->pre_pull->foreign_option_index = o->foreign_option_index;
if (o->routes)
{
o->pre_pull->routes = clone_route_option_list(o->routes, &o->gc);
o->pre_pull->routes_defined = true;
}
if (o->routes_ipv6)
{
o->pre_pull->routes_ipv6 = clone_route_ipv6_option_list(o->routes_ipv6, &o->gc);
o->pre_pull->routes_ipv6_defined = true;
}
if (o->client_nat)
{
o->pre_pull->client_nat = clone_client_nat_option_list(o->client_nat, &o->gc);
o->pre_pull->client_nat_defined = true;
}
}
}
void
pre_pull_restore(struct options *o, struct gc_arena *gc)
{
const struct options_pre_pull *pp = o->pre_pull;
if (pp)
{
CLEAR(o->tuntap_options);
if (pp->tuntap_options_defined)
{
o->tuntap_options = pp->tuntap_options;
}
if (pp->routes_defined)
{
rol_check_alloc(o);
copy_route_option_list(o->routes, pp->routes, gc);
}
else
{
o->routes = NULL;
}
if (pp->routes_ipv6_defined)
{
rol6_check_alloc(o);
copy_route_ipv6_option_list(o->routes_ipv6, pp->routes_ipv6, gc);
}
else
{
o->routes_ipv6 = NULL;
}
if (pp->client_nat_defined)
{
cnol_check_alloc(o);
copy_client_nat_option_list(o->client_nat, pp->client_nat);
}
else
{
o->client_nat = NULL;
}
o->foreign_option_index = pp->foreign_option_index;
}
o->push_continuation = 0;
o->push_option_types_found = 0;
}
#endif /* if P2MP */
#ifdef ENABLE_OCC
/**
* Calculate the link-mtu to advertise to our peer. The actual value is not
* relevant, because we will possibly perform data channel cipher negotiation
* after this, but older clients will log warnings if we do not supply them the
* value they expect. This assumes that the traditional cipher/auth directives
* in the config match the config of the peer.
*/
static size_t
calc_options_string_link_mtu(const struct options *o, const struct frame *frame)
{
size_t link_mtu = EXPANDED_SIZE(frame);
if (o->pull || o->mode == MODE_SERVER)
{
struct frame fake_frame = *frame;
struct key_type fake_kt;
init_key_type(&fake_kt, o->ciphername, o->authname, o->keysize, true,
false);
frame_add_to_extra_frame(&fake_frame, -(crypto_max_overhead()));
crypto_adjust_frame_parameters(&fake_frame, &fake_kt, o->replay,
cipher_kt_mode_ofb_cfb(fake_kt.cipher));
frame_finalize(&fake_frame, o->ce.link_mtu_defined, o->ce.link_mtu,
o->ce.tun_mtu_defined, o->ce.tun_mtu);
msg(D_MTU_DEBUG, "%s: link-mtu %u -> %d", __func__, (unsigned int) link_mtu,
EXPANDED_SIZE(&fake_frame));
link_mtu = EXPANDED_SIZE(&fake_frame);
}
return link_mtu;
}
/*
* Build an options string to represent data channel encryption options.
* This string must match exactly between peers. The keysize is checked
* separately by read_key().
*
* The following options must match on both peers:
*
* Tunnel options:
*
* --dev tun|tap [unit number need not match]
* --dev-type tun|tap
* --link-mtu
* --udp-mtu
* --tun-mtu
* --proto udp
* --proto tcp-client [matched with --proto tcp-server
* on the other end of the connection]
* --proto tcp-server [matched with --proto tcp-client on
* the other end of the connection]
* --tun-ipv6
* --ifconfig x y [matched with --ifconfig y x on
* the other end of the connection]
*
* --comp-lzo
* --compress alg
* --fragment
*
* Crypto Options:
*
* --cipher
* --auth
* --keysize
* --secret
* --no-replay
*
* SSL Options:
*
* --tls-auth
* --tls-client [matched with --tls-server on
* the other end of the connection]
* --tls-server [matched with --tls-client on
* the other end of the connection]
*/
char *
options_string(const struct options *o,
const struct frame *frame,
struct tuntap *tt,
bool remote,
struct gc_arena *gc)
{
struct buffer out = alloc_buf(OPTION_LINE_SIZE);
bool tt_local = false;
buf_printf(&out, "V4");
/*
* Tunnel Options
*/
buf_printf(&out, ",dev-type %s", dev_type_string(o->dev, o->dev_type));
buf_printf(&out, ",link-mtu %u", (unsigned int) calc_options_string_link_mtu(o, frame));
buf_printf(&out, ",tun-mtu %d", PAYLOAD_SIZE(frame));
buf_printf(&out, ",proto %s", proto_remote(o->ce.proto, remote));
/* send tun_ipv6 only in peer2peer mode - in client/server mode, it
* is usually pushed by the server, triggering a non-helpful warning
*/
if (o->ifconfig_ipv6_local && o->mode == MODE_POINT_TO_POINT && !PULL_DEFINED(o))
{
buf_printf(&out, ",tun-ipv6");
}
/*
* Try to get ifconfig parameters into the options string.
* If tt is undefined, make a temporary instantiation.
*/
if (!tt)
{
tt = init_tun(o->dev,
o->dev_type,
o->topology,
o->ifconfig_local,
o->ifconfig_remote_netmask,
o->ifconfig_ipv6_local,
o->ifconfig_ipv6_netbits,
o->ifconfig_ipv6_remote,
NULL,
NULL,
false,
NULL);
if (tt)
{
tt_local = true;
}
}
if (tt && o->mode == MODE_POINT_TO_POINT && !PULL_DEFINED(o))
{
const char *ios = ifconfig_options_string(tt, remote, o->ifconfig_nowarn, gc);
if (ios && strlen(ios))
{
buf_printf(&out, ",ifconfig %s", ios);
}
}
if (tt_local)
{
free(tt);
tt = NULL;
}
#ifdef USE_COMP
if (o->comp.alg != COMP_ALG_UNDEF)
{
buf_printf(&out, ",comp-lzo"); /* for compatibility, this simply indicates that compression context is active, not necessarily LZO per-se */
}
#endif
#ifdef ENABLE_FRAGMENT
if (o->ce.fragment)
{
buf_printf(&out, ",mtu-dynamic");
}
#endif
#define TLS_CLIENT (o->tls_client)
#define TLS_SERVER (o->tls_server)
/*
* Key direction
*/
{
const char *kd = keydirection2ascii(o->key_direction, remote, false);
if (kd)
{
buf_printf(&out, ",keydir %s", kd);
}
}
/*
* Crypto Options
*/
if (o->shared_secret_file || TLS_CLIENT || TLS_SERVER)
{
struct key_type kt;
ASSERT((o->shared_secret_file != NULL)
+ (TLS_CLIENT == true)
+ (TLS_SERVER == true)
<= 1);
init_key_type(&kt, o->ciphername, o->authname, o->keysize, true,
false);
buf_printf(&out, ",cipher %s",
translate_cipher_name_to_openvpn(cipher_kt_name(kt.cipher)));
buf_printf(&out, ",auth %s", md_kt_name(kt.digest));
buf_printf(&out, ",keysize %d", kt.cipher_length * 8);
if (o->shared_secret_file)
{
buf_printf(&out, ",secret");
}
if (!o->replay)
{
buf_printf(&out, ",no-replay");
}
#ifdef ENABLE_PREDICTION_RESISTANCE
if (o->use_prediction_resistance)
{
buf_printf(&out, ",use-prediction-resistance");
}
#endif
}
/*
* SSL Options
*/
{
if (TLS_CLIENT || TLS_SERVER)
{
if (o->tls_auth_file)
{
buf_printf(&out, ",tls-auth");
}
/* Not adding tls-crypt here, because we won't reach this code if
* tls-auth/tls-crypt does not match. Removing tls-auth here would
* break stuff, so leaving that in place. */
if (o->key_method > 1)
{
buf_printf(&out, ",key-method %d", o->key_method);
}
}
if (remote)
{
if (TLS_CLIENT)
{
buf_printf(&out, ",tls-server");
}
else if (TLS_SERVER)
{
buf_printf(&out, ",tls-client");
}
}
else
{
if (TLS_CLIENT)
{
buf_printf(&out, ",tls-client");
}
else if (TLS_SERVER)
{
buf_printf(&out, ",tls-server");
}
}
}
#undef TLS_CLIENT
#undef TLS_SERVER
return BSTR(&out);
}
/*
* Compare option strings for equality.
* If the first two chars of the strings differ, it means that
* we are looking at different versions of the options string,
* therefore don't compare them and return true.
*/
bool
options_cmp_equal(char *actual, const char *expected)
{
return options_cmp_equal_safe(actual, expected, strlen(actual) + 1);
}
void
options_warning(char *actual, const char *expected)
{
options_warning_safe(actual, expected, strlen(actual) + 1);
}
static const char *
options_warning_extract_parm1(const char *option_string,
struct gc_arena *gc_ret)
{
struct gc_arena gc = gc_new();
struct buffer b = string_alloc_buf(option_string, &gc);
char *p = gc_malloc(OPTION_PARM_SIZE, false, &gc);
const char *ret;
buf_parse(&b, ' ', p, OPTION_PARM_SIZE);
ret = string_alloc(p, gc_ret);
gc_free(&gc);
return ret;
}
static void
options_warning_safe_scan2(const int msglevel,
const int delim,
const bool report_inconsistent,
const char *p1,
const struct buffer *b2_src,
const char *b1_name,
const char *b2_name)
{
/* we will stop sending 'proto xxx' in OCC in a future version
* (because it's not useful), and to reduce questions when
* interoperating, we start not-printing a warning about it today
*/
if (strncmp(p1, "proto ", 6) == 0)
{
return;
}
if (strlen(p1) > 0)
{
struct gc_arena gc = gc_new();
struct buffer b2 = *b2_src;
const char *p1_prefix = options_warning_extract_parm1(p1, &gc);
char *p2 = gc_malloc(OPTION_PARM_SIZE, false, &gc);
while (buf_parse(&b2, delim, p2, OPTION_PARM_SIZE))
{
if (strlen(p2))
{
const char *p2_prefix = options_warning_extract_parm1(p2, &gc);
if (!strcmp(p1, p2))
{
goto done;
}
if (!strcmp(p1_prefix, p2_prefix))
{
if (report_inconsistent)
{
msg(msglevel, "WARNING: '%s' is used inconsistently, %s='%s', %s='%s'",
safe_print(p1_prefix, &gc),
b1_name,
safe_print(p1, &gc),
b2_name,
safe_print(p2, &gc));
}
goto done;
}
}
}
msg(msglevel, "WARNING: '%s' is present in %s config but missing in %s config, %s='%s'",
safe_print(p1_prefix, &gc),
b1_name,
b2_name,
b1_name,
safe_print(p1, &gc));
done:
gc_free(&gc);
}
}
static void
options_warning_safe_scan1(const int msglevel,
const int delim,
const bool report_inconsistent,
const struct buffer *b1_src,
const struct buffer *b2_src,
const char *b1_name,
const char *b2_name)
{
struct gc_arena gc = gc_new();
struct buffer b = *b1_src;
char *p = gc_malloc(OPTION_PARM_SIZE, true, &gc);
while (buf_parse(&b, delim, p, OPTION_PARM_SIZE))
{
options_warning_safe_scan2(msglevel, delim, report_inconsistent, p, b2_src, b1_name, b2_name);
}
gc_free(&gc);
}
static void
options_warning_safe_ml(const int msglevel, char *actual, const char *expected, size_t actual_n)
{
struct gc_arena gc = gc_new();
if (actual_n > 0)
{
struct buffer local = alloc_buf_gc(OPTION_PARM_SIZE + 16, &gc);
struct buffer remote = alloc_buf_gc(OPTION_PARM_SIZE + 16, &gc);
actual[actual_n - 1] = 0;
buf_printf(&local, "version %s", expected);
buf_printf(&remote, "version %s", actual);
options_warning_safe_scan1(msglevel, ',', true,
&local, &remote,
"local", "remote");
options_warning_safe_scan1(msglevel, ',', false,
&remote, &local,
"remote", "local");
}
gc_free(&gc);
}
bool
options_cmp_equal_safe(char *actual, const char *expected, size_t actual_n)
{
struct gc_arena gc = gc_new();
bool ret = true;
if (actual_n > 0)
{
actual[actual_n - 1] = 0;
#ifndef ENABLE_STRICT_OPTIONS_CHECK
if (strncmp(actual, expected, 2))
{
msg(D_SHOW_OCC, "NOTE: Options consistency check may be skewed by version differences");
options_warning_safe_ml(D_SHOW_OCC, actual, expected, actual_n);
}
else
#endif
ret = !strcmp(actual, expected);
}
gc_free(&gc);
return ret;
}
void
options_warning_safe(char *actual, const char *expected, size_t actual_n)
{
options_warning_safe_ml(M_WARN, actual, expected, actual_n);
}
const char *
options_string_version(const char *s, struct gc_arena *gc)
{
struct buffer out = alloc_buf_gc(4, gc);
strncpynt((char *) BPTR(&out), s, 3);
return BSTR(&out);
}
#endif /* ENABLE_OCC */
char *
options_string_extract_option(const char *options_string,const char *opt_name,
struct gc_arena *gc)
{
char *ret = NULL;
const size_t opt_name_len = strlen(opt_name);
const char *p = options_string;
while (p)
{
if (0 == strncmp(p, opt_name, opt_name_len)
&& strlen(p) > (opt_name_len+1) && p[opt_name_len] == ' ')
{
/* option found, extract value */
const char *start = &p[opt_name_len+1];
const char *end = strchr(p, ',');
size_t val_len = end ? end - start : strlen(start);
ret = gc_malloc(val_len+1, true, gc);
memcpy(ret, start, val_len);
break;
}
p = strchr(p, ',');
if (p)
{
p++; /* skip delimiter */
}
}
return ret;
}
static void
foreign_option(struct options *o, char *argv[], int len, struct env_set *es)
{
if (len > 0)
{
struct gc_arena gc = gc_new();
struct buffer name = alloc_buf_gc(OPTION_PARM_SIZE, &gc);
struct buffer value = alloc_buf_gc(OPTION_PARM_SIZE, &gc);
int i;
bool first = true;
bool good = true;
good &= buf_printf(&name, "foreign_option_%d", o->foreign_option_index + 1);
++o->foreign_option_index;
for (i = 0; i < len; ++i)
{
if (argv[i])
{
if (!first)
{
good &= buf_printf(&value, " ");
}
good &= buf_printf(&value, "%s", argv[i]);
first = false;
}
}
if (good)
{
setenv_str(es, BSTR(&name), BSTR(&value));
}
else
{
msg(M_WARN, "foreign_option: name/value overflow");
}
gc_free(&gc);
}
}
/*
* parse/print topology coding
*/
int
parse_topology(const char *str, const int msglevel)
{
if (streq(str, "net30"))
{
return TOP_NET30;
}
else if (streq(str, "p2p"))
{
return TOP_P2P;
}
else if (streq(str, "subnet"))
{
return TOP_SUBNET;
}
else
{
msg(msglevel, "--topology must be net30, p2p, or subnet");
return TOP_UNDEF;
}
}
const char *
print_topology(const int topology)
{
switch (topology)
{
case TOP_UNDEF:
return "undef";
case TOP_NET30:
return "net30";
case TOP_P2P:
return "p2p";
case TOP_SUBNET:
return "subnet";
default:
return "unknown";
}
}
#if P2MP
/*
* Manage auth-retry variable
*/
static int global_auth_retry; /* GLOBAL */
int
auth_retry_get(void)
{
return global_auth_retry;
}
bool
auth_retry_set(const int msglevel, const char *option)
{
if (streq(option, "interact"))
{
global_auth_retry = AR_INTERACT;
}
else if (streq(option, "nointeract"))
{
global_auth_retry = AR_NOINTERACT;
}
else if (streq(option, "none"))
{
global_auth_retry = AR_NONE;
}
else
{
msg(msglevel, "--auth-retry method must be 'interact', 'nointeract', or 'none'");
return false;
}
return true;
}
const char *
auth_retry_print(void)
{
switch (global_auth_retry)
{
case AR_NONE:
return "none";
case AR_NOINTERACT:
return "nointeract";
case AR_INTERACT:
return "interact";
default:
return "???";
}
}
#endif /* if P2MP */
/*
* Print the help message.
*/
static void
usage(void)
{
FILE *fp = msg_fp(0);
#ifdef ENABLE_SMALL
fprintf(fp, "Usage message not available\n");
#else
struct options o;
init_options(&o, true);
fprintf(fp, usage_message,
title_string,
o.ce.connect_retry_seconds,
o.ce.connect_retry_seconds_max,
o.ce.local_port, o.ce.remote_port,
TUN_MTU_DEFAULT, TAP_MTU_EXTRA_DEFAULT,
o.verbosity,
o.authname, o.ciphername,
o.replay_window, o.replay_time,
o.tls_timeout, o.renegotiate_seconds,
o.handshake_window, o.transition_window);
fflush(fp);
#endif /* ENABLE_SMALL */
openvpn_exit(OPENVPN_EXIT_STATUS_USAGE); /* exit point */
}
void
usage_small(void)
{
msg(M_WARN|M_NOPREFIX, "Use --help for more information.");
openvpn_exit(OPENVPN_EXIT_STATUS_USAGE); /* exit point */
}
#ifdef _WIN32
void
show_windows_version(const unsigned int flags)
{
struct gc_arena gc = gc_new();
msg(flags, "Windows version %s", win32_version_string(&gc, true));
gc_free(&gc);
}
#endif
void
show_library_versions(const unsigned int flags)
{
#ifdef ENABLE_LZO
#define LZO_LIB_VER_STR ", LZO ", lzo_version_string()
#else
#define LZO_LIB_VER_STR "", ""
#endif
msg(flags, "library versions: %s%s%s", get_ssl_library_version(),
LZO_LIB_VER_STR);
#undef LZO_LIB_VER_STR
}
static void
usage_version(void)
{
msg(M_INFO|M_NOPREFIX, "%s", title_string);
show_library_versions( M_INFO|M_NOPREFIX );
#ifdef _WIN32
show_windows_version( M_INFO|M_NOPREFIX );
#endif
msg(M_INFO|M_NOPREFIX, "Originally developed by James Yonan");
msg(M_INFO|M_NOPREFIX, "Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>");
#ifndef ENABLE_SMALL
#ifdef CONFIGURE_DEFINES
msg(M_INFO|M_NOPREFIX, "Compile time defines: %s", CONFIGURE_DEFINES);
#endif
#ifdef CONFIGURE_SPECIAL_BUILD
msg(M_INFO|M_NOPREFIX, "special build: %s", CONFIGURE_SPECIAL_BUILD);
#endif
#endif
openvpn_exit(OPENVPN_EXIT_STATUS_USAGE); /* exit point */
}
void
notnull(const char *arg, const char *description)
{
if (!arg)
{
msg(M_USAGE, "You must define %s", description);
}
}
bool
string_defined_equal(const char *s1, const char *s2)
{
if (s1 && s2)
{
return !strcmp(s1, s2);
}
else
{
return false;
}
}
#if 0
static void
ping_rec_err(int msglevel)
{
msg(msglevel, "only one of --ping-exit or --ping-restart options may be specified");
}
#endif
static int
positive_atoi(const char *str)
{
const int i = atoi(str);
return i < 0 ? 0 : i;
}
#ifdef _WIN32 /* This function is only used when compiling on Windows */
static unsigned int
atou(const char *str)
{
unsigned int val = 0;
sscanf(str, "%u", &val);
return val;
}
#endif
static inline bool
space(unsigned char c)
{
return c == '\0' || isspace(c);
}
int
parse_line(const char *line,
char *p[],
const int n,
const char *file,
const int line_num,
int msglevel,
struct gc_arena *gc)
{
const int STATE_INITIAL = 0;
const int STATE_READING_QUOTED_PARM = 1;
const int STATE_READING_UNQUOTED_PARM = 2;
const int STATE_DONE = 3;
const int STATE_READING_SQUOTED_PARM = 4;
const char *error_prefix = "";
int ret = 0;
const char *c = line;
int state = STATE_INITIAL;
bool backslash = false;
char in, out;
char parm[OPTION_PARM_SIZE];
unsigned int parm_len = 0;
msglevel &= ~M_OPTERR;
if (msglevel & M_MSG_VIRT_OUT)
{
error_prefix = "ERROR: ";
}
do
{
in = *c;
out = 0;
if (!backslash && in == '\\' && state != STATE_READING_SQUOTED_PARM)
{
backslash = true;
}
else
{
if (state == STATE_INITIAL)
{
if (!space(in))
{
if (in == ';' || in == '#') /* comment */
{
break;
}
if (!backslash && in == '\"')
{
state = STATE_READING_QUOTED_PARM;
}
else if (!backslash && in == '\'')
{
state = STATE_READING_SQUOTED_PARM;
}
else
{
out = in;
state = STATE_READING_UNQUOTED_PARM;
}
}
}
else if (state == STATE_READING_UNQUOTED_PARM)
{
if (!backslash && space(in))
{
state = STATE_DONE;
}
else
{
out = in;
}
}
else if (state == STATE_READING_QUOTED_PARM)
{
if (!backslash && in == '\"')
{
state = STATE_DONE;
}
else
{
out = in;
}
}
else if (state == STATE_READING_SQUOTED_PARM)
{
if (in == '\'')
{
state = STATE_DONE;
}
else
{
out = in;
}
}
if (state == STATE_DONE)
{
/* ASSERT (parm_len > 0); */
p[ret] = gc_malloc(parm_len + 1, true, gc);
memcpy(p[ret], parm, parm_len);
p[ret][parm_len] = '\0';
state = STATE_INITIAL;
parm_len = 0;
++ret;
}
if (backslash && out)
{
if (!(out == '\\' || out == '\"' || space(out)))
{
#ifdef ENABLE_SMALL
msg(msglevel, "%sOptions warning: Bad backslash ('\\') usage in %s:%d", error_prefix, file, line_num);
#else
msg(msglevel, "%sOptions warning: Bad backslash ('\\') usage in %s:%d: remember that backslashes are treated as shell-escapes and if you need to pass backslash characters as part of a Windows filename, you should use double backslashes such as \"c:\\\\" PACKAGE "\\\\static.key\"", error_prefix, file, line_num);
#endif
return 0;
}
}
backslash = false;
}
/* store parameter character */
if (out)
{
if (parm_len >= SIZE(parm))
{
parm[SIZE(parm) - 1] = 0;
msg(msglevel, "%sOptions error: Parameter at %s:%d is too long (%d chars max): %s",
error_prefix, file, line_num, (int) SIZE(parm), parm);
return 0;
}
parm[parm_len++] = out;
}
/* avoid overflow if too many parms in one config file line */
if (ret >= n)
{
break;
}
} while (*c++ != '\0');
if (state == STATE_READING_QUOTED_PARM)
{
msg(msglevel, "%sOptions error: No closing quotation (\") in %s:%d", error_prefix, file, line_num);
return 0;
}
if (state == STATE_READING_SQUOTED_PARM)
{
msg(msglevel, "%sOptions error: No closing single quotation (\') in %s:%d", error_prefix, file, line_num);
return 0;
}
if (state != STATE_INITIAL)
{
msg(msglevel, "%sOptions error: Residual parse state (%d) in %s:%d", error_prefix, state, file, line_num);
return 0;
}
#if 0
{
int i;
for (i = 0; i < ret; ++i)
{
msg(M_INFO|M_NOPREFIX, "%s:%d ARG[%d] '%s'", file, line_num, i, p[i]);
}
}
#endif
return ret;
}
static void
bypass_doubledash(char **p)
{
if (strlen(*p) >= 3 && !strncmp(*p, "--", 2))
{
*p += 2;
}
}
struct in_src {
#define IS_TYPE_FP 1
#define IS_TYPE_BUF 2
int type;
union {
FILE *fp;
struct buffer *multiline;
} u;
};
static bool
in_src_get(const struct in_src *is, char *line, const int size)
{
if (is->type == IS_TYPE_FP)
{
return BOOL_CAST(fgets(line, size, is->u.fp));
}
else if (is->type == IS_TYPE_BUF)
{
bool status = buf_parse(is->u.multiline, '\n', line, size);
if ((int) strlen(line) + 1 < size)
{
strcat(line, "\n");
}
return status;
}
else
{
ASSERT(0);
return false;
}
}
static char *
read_inline_file(struct in_src *is, const char *close_tag, struct gc_arena *gc)
{
char line[OPTION_LINE_SIZE];
struct buffer buf = alloc_buf(8*OPTION_LINE_SIZE);
char *ret;
bool endtagfound = false;
while (in_src_get(is, line, sizeof(line)))
{
char *line_ptr = line;
/* Remove leading spaces */
while (isspace(*line_ptr))
{
line_ptr++;
}
if (!strncmp(line_ptr, close_tag, strlen(close_tag)))
{
endtagfound = true;
break;
}
if (!buf_safe(&buf, strlen(line)+1))
{
/* Increase buffer size */
struct buffer buf2 = alloc_buf(buf.capacity * 2);
ASSERT(buf_copy(&buf2, &buf));
buf_clear(&buf);
free_buf(&buf);
buf = buf2;
}
buf_printf(&buf, "%s", line);
}
if (!endtagfound)
{
msg(M_FATAL, "ERROR: Endtag %s missing", close_tag);
}
ret = string_alloc(BSTR(&buf), gc);
buf_clear(&buf);
free_buf(&buf);
secure_memzero(line, sizeof(line));
return ret;
}
static bool
check_inline_file(struct in_src *is, char *p[], struct gc_arena *gc)
{
bool ret = false;
if (p[0] && !p[1])
{
char *arg = p[0];
if (arg[0] == '<' && arg[strlen(arg)-1] == '>')
{
struct buffer close_tag;
arg[strlen(arg)-1] = '\0';
p[0] = string_alloc(arg+1, gc);
p[1] = string_alloc(INLINE_FILE_TAG, gc);
close_tag = alloc_buf(strlen(p[0]) + 4);
buf_printf(&close_tag, "</%s>", p[0]);
p[2] = read_inline_file(is, BSTR(&close_tag), gc);
p[3] = NULL;
free_buf(&close_tag);
ret = true;
}
}
return ret;
}
static bool
check_inline_file_via_fp(FILE *fp, char *p[], struct gc_arena *gc)
{
struct in_src is;
is.type = IS_TYPE_FP;
is.u.fp = fp;
return check_inline_file(&is, p, gc);
}
static bool
check_inline_file_via_buf(struct buffer *multiline, char *p[], struct gc_arena *gc)
{
struct in_src is;
is.type = IS_TYPE_BUF;
is.u.multiline = multiline;
return check_inline_file(&is, p, gc);
}
static void
add_option(struct options *options,
char *p[],
const char *file,
int line,
const int level,
const int msglevel,
const unsigned int permission_mask,
unsigned int *option_types_found,
struct env_set *es);
static void
read_config_file(struct options *options,
const char *file,
int level,
const char *top_file,
const int top_line,
const int msglevel,
const unsigned int permission_mask,
unsigned int *option_types_found,
struct env_set *es)
{
const int max_recursive_levels = 10;
FILE *fp;
int line_num;
char line[OPTION_LINE_SIZE+1];
char *p[MAX_PARMS+1];
++level;
if (level <= max_recursive_levels)
{
if (streq(file, "stdin"))
{
fp = stdin;
}
else
{
fp = platform_fopen(file, "r");
}
if (fp)
{
line_num = 0;
while (fgets(line, sizeof(line), fp))
{
int offset = 0;
CLEAR(p);
++line_num;
if (strlen(line) == OPTION_LINE_SIZE)
{
msg(msglevel, "In %s:%d: Maximum option line length (%d) exceeded, line starts with %s",
file, line_num, OPTION_LINE_SIZE, line);
}
/* Ignore UTF-8 BOM at start of stream */
if (line_num == 1 && strncmp(line, "\xEF\xBB\xBF", 3) == 0)
{
offset = 3;
}
if (parse_line(line + offset, p, SIZE(p)-1, file, line_num, msglevel, &options->gc))
{
bypass_doubledash(&p[0]);
check_inline_file_via_fp(fp, p, &options->gc);
add_option(options, p, file, line_num, level, msglevel, permission_mask, option_types_found, es);
}
}
if (fp != stdin)
{
fclose(fp);
}
}
else
{
msg(msglevel, "In %s:%d: Error opening configuration file: %s", top_file, top_line, file);
}
}
else
{
msg(msglevel, "In %s:%d: Maximum recursive include levels exceeded in include attempt of file %s -- probably you have a configuration file that tries to include itself.", top_file, top_line, file);
}
secure_memzero(line, sizeof(line));
CLEAR(p);
}
static void
read_config_string(const char *prefix,
struct options *options,
const char *config,
const int msglevel,
const unsigned int permission_mask,
unsigned int *option_types_found,
struct env_set *es)
{
char line[OPTION_LINE_SIZE];
struct buffer multiline;
int line_num = 0;
buf_set_read(&multiline, (uint8_t *)config, strlen(config));
while (buf_parse(&multiline, '\n', line, sizeof(line)))
{
char *p[MAX_PARMS+1];
CLEAR(p);
++line_num;
if (parse_line(line, p, SIZE(p)-1, prefix, line_num, msglevel, &options->gc))
{
bypass_doubledash(&p[0]);
check_inline_file_via_buf(&multiline, p, &options->gc);
add_option(options, p, prefix, line_num, 0, msglevel, permission_mask, option_types_found, es);
}
CLEAR(p);
}
secure_memzero(line, sizeof(line));
}
void
parse_argv(struct options *options,
const int argc,
char *argv[],
const int msglevel,
const unsigned int permission_mask,
unsigned int *option_types_found,
struct env_set *es)
{
int i, j;
/* usage message */
if (argc <= 1)
{
usage();
}
/* config filename specified only? */
if (argc == 2 && strncmp(argv[1], "--", 2))
{
char *p[MAX_PARMS];
CLEAR(p);
p[0] = "config";
p[1] = argv[1];
add_option(options, p, NULL, 0, 0, msglevel, permission_mask, option_types_found, es);
}
else
{
/* parse command line */
for (i = 1; i < argc; ++i)
{
char *p[MAX_PARMS];
CLEAR(p);
p[0] = argv[i];
if (strncmp(p[0], "--", 2))
{
msg(msglevel, "I'm trying to parse \"%s\" as an --option parameter but I don't see a leading '--'", p[0]);
}
else
{
p[0] += 2;
}
for (j = 1; j < MAX_PARMS; ++j)
{
if (i + j < argc)
{
char *arg = argv[i + j];
if (strncmp(arg, "--", 2))
{
p[j] = arg;
}
else
{
break;
}
}
}
add_option(options, p, NULL, 0, 0, msglevel, permission_mask, option_types_found, es);
i += j - 1;
}
}
}
/**
* Filter an option line by all pull filters.
*
* If a match is found, the line is modified depending on
* the filter type, and returns true. If the filter type is
* reject, SIGUSR1 is triggered and the return value is false.
* In that case the caller must end the push processing.
*/
static bool
apply_pull_filter(const struct options *o, char *line)
{
struct pull_filter *f;
if (!o->pull_filter_list)
{
return true;
}
for (f = o->pull_filter_list->head; f; f = f->next)
{
if (f->type == PUF_TYPE_ACCEPT && strncmp(line, f->pattern, f->size) == 0)
{
msg(D_LOW, "Pushed option accepted by filter: '%s'", line);
return true;
}
else if (f->type == PUF_TYPE_IGNORE && strncmp(line, f->pattern, f->size) == 0)
{
msg(D_PUSH, "Pushed option removed by filter: '%s'", line);
*line = '\0';
return true;
}
else if (f->type == PUF_TYPE_REJECT && strncmp(line, f->pattern, f->size) == 0)
{
msg(M_WARN, "Pushed option rejected by filter: '%s'. Restarting.", line);
*line = '\0';
throw_signal_soft(SIGUSR1, "Offending option received from server");
return false;
}
}
return true;
}
bool
apply_push_options(struct options *options,
struct buffer *buf,
unsigned int permission_mask,
unsigned int *option_types_found,
struct env_set *es)
{
char line[OPTION_PARM_SIZE];
int line_num = 0;
const char *file = "[PUSH-OPTIONS]";
const int msglevel = D_PUSH_ERRORS|M_OPTERR;
while (buf_parse(buf, ',', line, sizeof(line)))
{
char *p[MAX_PARMS+1];
CLEAR(p);
++line_num;
if (!apply_pull_filter(options, line))
{
return false; /* Cause push/pull error and stop push processing */
}
if (parse_line(line, p, SIZE(p)-1, file, line_num, msglevel, &options->gc))
{
add_option(options, p, file, line_num, 0, msglevel, permission_mask, option_types_found, es);
}
}
return true;
}
void
options_server_import(struct options *o,
const char *filename,
int msglevel,
unsigned int permission_mask,
unsigned int *option_types_found,
struct env_set *es)
{
msg(D_PUSH, "OPTIONS IMPORT: reading client specific options from: %s", filename);
read_config_file(o,
filename,
0,
filename,
0,
msglevel,
permission_mask,
option_types_found,
es);
}
void
options_string_import(struct options *options,
const char *config,
const int msglevel,
const unsigned int permission_mask,
unsigned int *option_types_found,
struct env_set *es)
{
read_config_string("[CONFIG-STRING]", options, config, msglevel, permission_mask, option_types_found, es);
}
#if P2MP
#define VERIFY_PERMISSION(mask) { if (!verify_permission(p[0], file, line, (mask), permission_mask, option_types_found, msglevel, options)) {goto err;}}
static bool
verify_permission(const char *name,
const char *file,
int line,
const unsigned int type,
const unsigned int allowed,
unsigned int *found,
const int msglevel,
struct options *options)
{
if (!(type & allowed))
{
msg(msglevel, "option '%s' cannot be used in this context (%s)", name, file);
return false;
}
if (found)
{
*found |= type;
}
#ifndef ENABLE_SMALL
/* Check if this options is allowed in connection block,
* but we are currently not in a connection block
* unless this is a pushed option.
* Parsing a connection block uses a temporary options struct without
* connection_list
*/
if ((type & OPT_P_CONNECTION) && options->connection_list
&& !(allowed & OPT_P_PULL_MODE))
{
if (file)
{
msg(M_WARN, "Option '%s' in %s:%d is ignored by previous <connection> blocks ", name, file, line);
}
else
{
msg(M_WARN, "Option '%s' is ignored by previous <connection> blocks", name);
}
}
#endif
return true;
}
#else /* if P2MP */
#define VERIFY_PERMISSION(mask)
#endif /* if P2MP */
/*
* Check that an option doesn't have too
* many parameters.
*/
#define NM_QUOTE_HINT (1<<0)
static bool
no_more_than_n_args(const int msglevel,
char *p[],
const int max,
const unsigned int flags)
{
const int len = string_array_len((const char **)p);
if (!len)
{
return false;
}
if (len > max)
{
msg(msglevel, "the --%s directive should have at most %d parameter%s.%s",
p[0],
max - 1,
max >= 3 ? "s" : "",
(flags & NM_QUOTE_HINT) ? " To pass a list of arguments as one of the parameters, try enclosing them in double quotes (\"\")." : "");
return false;
}
else
{
return true;
}
}
static inline int
msglevel_forward_compatible(struct options *options, const int msglevel)
{
return options->forward_compatible ? M_WARN : msglevel;
}
static void
set_user_script(struct options *options,
const char **script,
const char *new_script,
const char *type,
bool in_chroot)
{
if (*script)
{
msg(M_WARN, "Multiple --%s scripts defined. "
"The previously configured script is overridden.", type);
}
*script = new_script;
options->user_script_used = true;
#ifndef ENABLE_SMALL
{
char script_name[100];
openvpn_snprintf(script_name, sizeof(script_name),
"--%s script", type);
if (check_cmd_access(*script, script_name, (in_chroot ? options->chroot_dir : NULL)))
{
msg(M_USAGE, "Please correct this error.");
}
}
#endif
}
static void
add_option(struct options *options,
char *p[],
const char *file,
int line,
const int level,
const int msglevel,
const unsigned int permission_mask,
unsigned int *option_types_found,
struct env_set *es)
{
struct gc_arena gc = gc_new();
const bool pull_mode = BOOL_CAST(permission_mask & OPT_P_PULL_MODE);
int msglevel_fc = msglevel_forward_compatible(options, msglevel);
ASSERT(MAX_PARMS >= 7);
/*
* If directive begins with "setenv opt" prefix, don't raise an error if
* directive is unrecognized.
*/
if (streq(p[0], "setenv") && p[1] && streq(p[1], "opt") && !(permission_mask & OPT_P_PULL_MODE))
{
if (!p[2])
{
p[2] = "setenv opt"; /* will trigger an error that includes setenv opt */
}
p += 2;
msglevel_fc = M_WARN;
}
if (!file)
{
file = "[CMD-LINE]";
line = 1;
}
if (streq(p[0], "help"))
{
VERIFY_PERMISSION(OPT_P_GENERAL);
usage();
if (p[1])
{
msg(msglevel, "--help does not accept any parameters");
goto err;
}
}
if (streq(p[0], "version") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
usage_version();
}
else if (streq(p[0], "config") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_CONFIG);
/* save first config file only in options */
if (!options->config)
{
options->config = p[1];
}
read_config_file(options, p[1], level, file, line, msglevel, permission_mask, option_types_found, es);
}
#if defined(ENABLE_DEBUG) && !defined(ENABLE_SMALL)
else if (streq(p[0], "show-gateway") && !p[2])
{
struct route_gateway_info rgi;
struct route_ipv6_gateway_info rgi6;
struct in6_addr remote = IN6ADDR_ANY_INIT;
VERIFY_PERMISSION(OPT_P_GENERAL);
if (p[1])
{
get_ipv6_addr(p[1], &remote, NULL, M_WARN);
}
get_default_gateway(&rgi);
get_default_gateway_ipv6(&rgi6, &remote);
print_default_gateway(M_INFO, &rgi, &rgi6);
openvpn_exit(OPENVPN_EXIT_STATUS_GOOD); /* exit point */
}
#endif
#if 0
else if (streq(p[0], "foreign-option") && p[1])
{
VERIFY_PERMISSION(OPT_P_IPWIN32);
foreign_option(options, p, 3, es);
}
#endif
else if (streq(p[0], "echo") || streq(p[0], "parameter"))
{
struct buffer string = alloc_buf_gc(OPTION_PARM_SIZE, &gc);
int j;
bool good = true;
VERIFY_PERMISSION(OPT_P_ECHO);
for (j = 1; j < MAX_PARMS; ++j)
{
if (!p[j])
{
break;
}
if (j > 1)
{
good &= buf_printf(&string, " ");
}
good &= buf_printf(&string, "%s", p[j]);
}
if (good)
{
#if 0
/* removed for now since ECHO can potentially include
* security-sensitive strings */
msg(M_INFO, "%s:%s",
pull_mode ? "ECHO-PULL" : "ECHO",
BSTR(&string));
#endif
#ifdef ENABLE_MANAGEMENT
if (management)
{
management_echo(management, BSTR(&string), pull_mode);
}
#endif
}
else
{
msg(M_WARN, "echo/parameter option overflow");
}
}
#ifdef ENABLE_MANAGEMENT
else if (streq(p[0], "management") && p[1] && p[2] && !p[4])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[2], "unix"))
{
#if UNIX_SOCK_SUPPORT
options->management_flags |= MF_UNIX_SOCK;
#else
msg(msglevel, "MANAGEMENT: this platform does not support unix domain sockets");
goto err;
#endif
}
options->management_addr = p[1];
options->management_port = p[2];
if (p[3])
{
options->management_user_pass = p[3];
}
}
else if (streq(p[0], "management-client-user") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_client_user = p[1];
}
else if (streq(p[0], "management-client-group") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_client_group = p[1];
}
else if (streq(p[0], "management-query-passwords") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_QUERY_PASSWORDS;
}
else if (streq(p[0], "management-query-remote") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_QUERY_REMOTE;
}
else if (streq(p[0], "management-query-proxy") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_QUERY_PROXY;
}
else if (streq(p[0], "management-hold") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_HOLD;
}
else if (streq(p[0], "management-signal") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_SIGNAL;
}
else if (streq(p[0], "management-forget-disconnect") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_FORGET_DISCONNECT;
}
else if (streq(p[0], "management-up-down") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_UP_DOWN;
}
else if (streq(p[0], "management-client") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_CONNECT_AS_CLIENT;
options->management_write_peer_info_file = p[1];
}
#ifdef MANAGMENT_EXTERNAL_KEY
else if (streq(p[0], "management-external-key") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_EXTERNAL_KEY;
}
else if (streq(p[0], "management-external-cert") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_EXTERNAL_CERT;
options->management_certificate = p[1];
}
#endif
#ifdef MANAGEMENT_DEF_AUTH
else if (streq(p[0], "management-client-auth") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= MF_CLIENT_AUTH;
}
#endif
#ifdef MANAGEMENT_PF
else if (streq(p[0], "management-client-pf") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->management_flags |= (MF_CLIENT_PF | MF_CLIENT_AUTH);
}
#endif
else if (streq(p[0], "management-log-cache") && p[1] && !p[2])
{
int cache;
VERIFY_PERMISSION(OPT_P_GENERAL);
cache = atoi(p[1]);
if (cache < 1)
{
msg(msglevel, "--management-log-cache parameter is out of range");
goto err;
}
options->management_log_history_cache = cache;
}
#endif /* ifdef ENABLE_MANAGEMENT */
#ifdef ENABLE_PLUGIN
else if (streq(p[0], "plugin") && p[1])
{
VERIFY_PERMISSION(OPT_P_PLUGIN);
if (!options->plugin_list)
{
options->plugin_list = plugin_option_list_new(&options->gc);
}
if (!plugin_option_list_add(options->plugin_list, &p[1], &options->gc))
{
msg(msglevel, "plugin add failed: %s", p[1]);
goto err;
}
}
#endif
else if (streq(p[0], "mode") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], "p2p"))
{
options->mode = MODE_POINT_TO_POINT;
}
#if P2MP_SERVER
else if (streq(p[1], "server"))
{
options->mode = MODE_SERVER;
}
#endif
else
{
msg(msglevel, "Bad --mode parameter: %s", p[1]);
goto err;
}
}
else if (streq(p[0], "dev") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->dev = p[1];
}
else if (streq(p[0], "dev-type") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->dev_type = p[1];
}
else if (streq(p[0], "dev-node") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->dev_node = p[1];
}
else if (streq(p[0], "lladdr") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_UP);
if (mac_addr_safe(p[1])) /* MAC address only */
{
options->lladdr = p[1];
}
else
{
msg(msglevel, "lladdr parm '%s' must be a MAC address", p[1]);
goto err;
}
}
else if (streq(p[0], "topology") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_UP);
options->topology = parse_topology(p[1], msglevel);
}
else if (streq(p[0], "tun-ipv6") && !p[1])
{
if (!pull_mode)
{
msg(M_WARN, "Note: option tun-ipv6 is ignored because modern operating systems do not need special IPv6 tun handling anymore.");
}
}
#ifdef ENABLE_IPROUTE
else if (streq(p[0], "iproute") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
iproute_path = p[1];
}
#endif
else if (streq(p[0], "ifconfig") && p[1] && p[2] && !p[3])
{
VERIFY_PERMISSION(OPT_P_UP);
if (ip_or_dns_addr_safe(p[1], options->allow_pull_fqdn) && ip_or_dns_addr_safe(p[2], options->allow_pull_fqdn)) /* FQDN -- may be DNS name */
{
options->ifconfig_local = p[1];
options->ifconfig_remote_netmask = p[2];
}
else
{
msg(msglevel, "ifconfig parms '%s' and '%s' must be valid addresses", p[1], p[2]);
goto err;
}
}
else if (streq(p[0], "ifconfig-ipv6") && p[1] && p[2] && !p[3])
{
unsigned int netbits;
VERIFY_PERMISSION(OPT_P_UP);
if (get_ipv6_addr( p[1], NULL, &netbits, msglevel )
&& ipv6_addr_safe( p[2] ) )
{
if (netbits < 64 || netbits > 124)
{
msg( msglevel, "ifconfig-ipv6: /netbits must be between 64 and 124, not '/%d'", netbits );
goto err;
}
options->ifconfig_ipv6_local = get_ipv6_addr_no_netbits(p[1], &options->gc);
options->ifconfig_ipv6_netbits = netbits;
options->ifconfig_ipv6_remote = p[2];
}
else
{
msg(msglevel, "ifconfig-ipv6 parms '%s' and '%s' must be valid addresses", p[1], p[2]);
goto err;
}
}
else if (streq(p[0], "ifconfig-noexec") && !p[1])
{
VERIFY_PERMISSION(OPT_P_UP);
options->ifconfig_noexec = true;
}
else if (streq(p[0], "ifconfig-nowarn") && !p[1])
{
VERIFY_PERMISSION(OPT_P_UP);
options->ifconfig_nowarn = true;
}
else if (streq(p[0], "local") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.local = p[1];
}
else if (streq(p[0], "remote-random") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->remote_random = true;
}
else if (streq(p[0], "connection") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
struct options sub;
struct connection_entry *e;
init_options(&sub, true);
sub.ce = options->ce;
read_config_string("[CONNECTION-OPTIONS]", &sub, p[2], msglevel, OPT_P_CONNECTION, option_types_found, es);
if (!sub.ce.remote)
{
msg(msglevel, "Each 'connection' block must contain exactly one 'remote' directive");
uninit_options(&sub);
goto err;
}
e = alloc_connection_entry(options, msglevel);
if (!e)
{
uninit_options(&sub);
goto err;
}
*e = sub.ce;
gc_transfer(&options->gc, &sub.gc);
uninit_options(&sub);
}
}
else if (streq(p[0], "ignore-unknown-option") && p[1])
{
int i;
int j;
int numignored = 0;
const char **ignore;
VERIFY_PERMISSION(OPT_P_GENERAL);
/* Find out how many options to be ignored */
for (i = 1; p[i]; i++)
{
numignored++;
}
/* add number of options already ignored */
for (i = 0; options->ignore_unknown_option
&& options->ignore_unknown_option[i]; i++)
{
numignored++;
}
/* Allocate array */
ALLOC_ARRAY_GC(ignore, const char *, numignored+1, &options->gc);
for (i = 0; options->ignore_unknown_option
&& options->ignore_unknown_option[i]; i++)
{
ignore[i] = options->ignore_unknown_option[i];
}
options->ignore_unknown_option = ignore;
for (j = 1; p[j]; j++)
{
/* Allow the user to specify ignore-unknown-option --opt too */
if (p[j][0]=='-' && p[j][1]=='-')
{
options->ignore_unknown_option[i] = (p[j]+2);
}
else
{
options->ignore_unknown_option[i] = p[j];
}
i++;
}
options->ignore_unknown_option[i] = NULL;
}
#if ENABLE_MANAGEMENT
else if (streq(p[0], "http-proxy-override") && p[1] && p[2] && !p[4])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->http_proxy_override = parse_http_proxy_override(p[1], p[2], p[3], msglevel, &options->gc);
if (!options->http_proxy_override)
{
goto err;
}
}
#endif
else if (streq(p[0], "remote") && p[1] && !p[4])
{
struct remote_entry re;
re.remote = re.remote_port = NULL;
re.proto = -1;
re.af = 0;
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
re.remote = p[1];
if (p[2])
{
re.remote_port = p[2];
if (p[3])
{
const int proto = ascii2proto(p[3]);
const sa_family_t af = ascii2af(p[3]);
if (proto < 0)
{
msg(msglevel, "remote: bad protocol associated with host %s: '%s'", p[1], p[3]);
goto err;
}
re.proto = proto;
re.af = af;
}
}
if (permission_mask & OPT_P_GENERAL)
{
struct remote_entry *e = alloc_remote_entry(options, msglevel);
if (!e)
{
goto err;
}
*e = re;
}
else if (permission_mask & OPT_P_CONNECTION)
{
connection_entry_load_re(&options->ce, &re);
}
}
else if (streq(p[0], "resolv-retry") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], "infinite"))
{
options->resolve_retry_seconds = RESOLV_RETRY_INFINITE;
}
else
{
options->resolve_retry_seconds = positive_atoi(p[1]);
}
}
else if ((streq(p[0], "preresolve") || streq(p[0], "ip-remote-hint")) && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->resolve_in_advance = true;
/* Note the ip-remote-hint and the argument p[1] are for
* backward compatibility */
if (p[1])
{
options->ip_remote_hint = p[1];
}
}
else if (streq(p[0], "connect-retry") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.connect_retry_seconds = positive_atoi(p[1]);
/*
* Limit the base value of retry wait interval to 16 bits to avoid
* overflow when scaled up for exponential backoff
*/
if (options->ce.connect_retry_seconds > 0xFFFF)
{
options->ce.connect_retry_seconds = 0xFFFF;
msg(M_WARN, "connect retry wait interval truncated to %d",
options->ce.connect_retry_seconds);
}
if (p[2])
{
options->ce.connect_retry_seconds_max =
max_int(positive_atoi(p[2]), options->ce.connect_retry_seconds);
}
}
else if ((streq(p[0], "connect-timeout") || streq(p[0], "server-poll-timeout"))
&& p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.connect_timeout = positive_atoi(p[1]);
}
else if (streq(p[0], "connect-retry-max") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->connect_retry_max = positive_atoi(p[1]);
}
else if (streq(p[0], "ipchange") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options,
&options->ipchange,
string_substitute(p[1], ',', ' ', &options->gc),
"ipchange", true);
}
else if (streq(p[0], "float") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.remote_float = true;
}
#ifdef ENABLE_DEBUG
else if (streq(p[0], "gremlin") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->gremlin = positive_atoi(p[1]);
}
#endif
else if (streq(p[0], "chroot") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->chroot_dir = p[1];
}
else if (streq(p[0], "cd") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (platform_chdir(p[1]))
{
msg(M_ERR, "cd to '%s' failed", p[1]);
goto err;
}
options->cd_dir = p[1];
}
#ifdef ENABLE_SELINUX
else if (streq(p[0], "setcon") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->selinux_context = p[1];
}
#endif
else if (streq(p[0], "writepid") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->writepid = p[1];
}
else if (streq(p[0], "up") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options, &options->up_script, p[1], "up", false);
}
else if (streq(p[0], "down") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options, &options->down_script, p[1], "down", true);
}
else if (streq(p[0], "down-pre") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->down_pre = true;
}
else if (streq(p[0], "up-delay") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->up_delay = true;
}
else if (streq(p[0], "up-restart") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->up_restart = true;
}
else if (streq(p[0], "syslog") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
open_syslog(p[1], false);
}
else if (streq(p[0], "daemon") && !p[2])
{
bool didit = false;
VERIFY_PERMISSION(OPT_P_GENERAL);
if (!options->daemon)
{
options->daemon = didit = true;
open_syslog(p[1], false);
}
if (p[1])
{
if (!didit)
{
msg(M_WARN, "WARNING: Multiple --daemon directives specified, ignoring --daemon %s. (Note that initscripts sometimes add their own --daemon directive.)", p[1]);
goto err;
}
}
}
else if (streq(p[0], "inetd") && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (!options->inetd)
{
int z;
const char *name = NULL;
const char *opterr = "when --inetd is used with two parameters, one of them must be 'wait' or 'nowait' and the other must be a daemon name to use for system logging";
options->inetd = -1;
for (z = 1; z <= 2; ++z)
{
if (p[z])
{
if (streq(p[z], "wait"))
{
if (options->inetd != -1)
{
msg(msglevel, "%s", opterr);
goto err;
}
else
{
options->inetd = INETD_WAIT;
}
}
else if (streq(p[z], "nowait"))
{
if (options->inetd != -1)
{
msg(msglevel, "%s", opterr);
goto err;
}
else
{
options->inetd = INETD_NOWAIT;
}
}
else
{
if (name != NULL)
{
msg(msglevel, "%s", opterr);
goto err;
}
name = p[z];
}
}
}
/* default */
if (options->inetd == -1)
{
options->inetd = INETD_WAIT;
}
save_inetd_socket_descriptor();
open_syslog(name, true);
}
}
else if (streq(p[0], "log") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->log = true;
redirect_stdout_stderr(p[1], false);
}
else if (streq(p[0], "suppress-timestamps") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->suppress_timestamps = true;
set_suppress_timestamps(true);
}
else if (streq(p[0], "machine-readable-output") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->machine_readable_output = true;
set_machine_readable_output(true);
}
else if (streq(p[0], "log-append") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->log = true;
redirect_stdout_stderr(p[1], true);
}
#ifdef ENABLE_MEMSTATS
else if (streq(p[0], "memstats") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->memstats_fn = p[1];
}
#endif
else if (streq(p[0], "mlock") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->mlock = true;
}
#if ENABLE_IP_PKTINFO
else if (streq(p[0], "multihome") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->sockflags |= SF_USE_IP_PKTINFO;
}
#endif
else if (streq(p[0], "verb") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_MESSAGES);
options->verbosity = positive_atoi(p[1]);
#if !defined(ENABLE_DEBUG) && !defined(ENABLE_SMALL)
/* Warn when a debug verbosity is supplied when built without debug support */
if (options->verbosity >= 7)
{
msg(M_WARN, "NOTE: debug verbosity (--verb %d) is enabled but this build lacks debug support.",
options->verbosity);
}
#endif
}
else if (streq(p[0], "mute") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_MESSAGES);
options->mute = positive_atoi(p[1]);
}
else if (streq(p[0], "errors-to-stderr") && !p[1])
{
VERIFY_PERMISSION(OPT_P_MESSAGES);
errors_to_stderr();
}
else if (streq(p[0], "status") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->status_file = p[1];
if (p[2])
{
options->status_file_update_freq = positive_atoi(p[2]);
}
}
else if (streq(p[0], "status-version") && p[1] && !p[2])
{
int version;
VERIFY_PERMISSION(OPT_P_GENERAL);
version = atoi(p[1]);
if (version < 1 || version > 3)
{
msg(msglevel, "--status-version must be 1 to 3");
goto err;
}
options->status_file_version = version;
}
else if (streq(p[0], "remap-usr1") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], "SIGHUP"))
{
options->remap_sigusr1 = SIGHUP;
}
else if (streq(p[1], "SIGTERM"))
{
options->remap_sigusr1 = SIGTERM;
}
else
{
msg(msglevel, "--remap-usr1 parm must be 'SIGHUP' or 'SIGTERM'");
goto err;
}
}
else if ((streq(p[0], "link-mtu") || streq(p[0], "udp-mtu")) && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_MTU|OPT_P_CONNECTION);
options->ce.link_mtu = positive_atoi(p[1]);
options->ce.link_mtu_defined = true;
}
else if (streq(p[0], "tun-mtu") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_MTU|OPT_P_CONNECTION);
options->ce.tun_mtu = positive_atoi(p[1]);
options->ce.tun_mtu_defined = true;
}
else if (streq(p[0], "tun-mtu-extra") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_MTU|OPT_P_CONNECTION);
options->ce.tun_mtu_extra = positive_atoi(p[1]);
options->ce.tun_mtu_extra_defined = true;
}
#ifdef ENABLE_FRAGMENT
else if (streq(p[0], "mtu-dynamic"))
{
VERIFY_PERMISSION(OPT_P_MTU|OPT_P_CONNECTION);
msg(msglevel, "--mtu-dynamic has been replaced by --fragment");
goto err;
}
else if (streq(p[0], "fragment") && p[1] && !p[2])
{
/* VERIFY_PERMISSION (OPT_P_MTU); */
VERIFY_PERMISSION(OPT_P_MTU|OPT_P_CONNECTION);
options->ce.fragment = positive_atoi(p[1]);
}
#endif
else if (streq(p[0], "mtu-disc") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_MTU|OPT_P_CONNECTION);
options->ce.mtu_discover_type = translate_mtu_discover_type_name(p[1]);
}
#ifdef ENABLE_OCC
else if (streq(p[0], "mtu-test") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->mtu_test = true;
}
#endif
else if (streq(p[0], "nice") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_NICE);
options->nice = atoi(p[1]);
}
else if (streq(p[0], "rcvbuf") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_SOCKBUF);
options->rcvbuf = positive_atoi(p[1]);
}
else if (streq(p[0], "sndbuf") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_SOCKBUF);
options->sndbuf = positive_atoi(p[1]);
}
else if (streq(p[0], "mark") && p[1] && !p[2])
{
#if defined(TARGET_LINUX) && HAVE_DECL_SO_MARK
VERIFY_PERMISSION(OPT_P_GENERAL);
options->mark = atoi(p[1]);
#endif
}
else if (streq(p[0], "socket-flags"))
{
int j;
VERIFY_PERMISSION(OPT_P_SOCKFLAGS);
for (j = 1; j < MAX_PARMS && p[j]; ++j)
{
if (streq(p[j], "TCP_NODELAY"))
{
options->sockflags |= SF_TCP_NODELAY;
}
else
{
msg(msglevel, "unknown socket flag: %s", p[j]);
}
}
}
else if (streq(p[0], "txqueuelen") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
#ifdef TARGET_LINUX
options->tuntap_options.txqueuelen = positive_atoi(p[1]);
#else
msg(msglevel, "--txqueuelen not supported on this OS");
goto err;
#endif
}
else if (streq(p[0], "shaper") && p[1] && !p[2])
{
#ifdef ENABLE_FEATURE_SHAPER
int shaper;
VERIFY_PERMISSION(OPT_P_SHAPER);
shaper = atoi(p[1]);
if (shaper < SHAPER_MIN || shaper > SHAPER_MAX)
{
msg(msglevel, "Bad shaper value, must be between %d and %d",
SHAPER_MIN, SHAPER_MAX);
goto err;
}
options->shaper = shaper;
#else /* ENABLE_FEATURE_SHAPER */
VERIFY_PERMISSION(OPT_P_GENERAL);
msg(msglevel, "--shaper requires the gettimeofday() function which is missing");
goto err;
#endif /* ENABLE_FEATURE_SHAPER */
}
else if (streq(p[0], "port") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.local_port = options->ce.remote_port = p[1];
}
else if (streq(p[0], "lport") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.local_port_defined = true;
options->ce.local_port = p[1];
}
else if (streq(p[0], "rport") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.remote_port = p[1];
}
else if (streq(p[0], "bind") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.bind_defined = true;
if (p[1] && streq(p[1], "ipv6only"))
{
options->ce.bind_ipv6_only = true;
}
}
else if (streq(p[0], "nobind") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
options->ce.bind_local = false;
}
else if (streq(p[0], "fast-io") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->fast_io = true;
}
else if (streq(p[0], "inactive") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_TIMER);
options->inactivity_timeout = positive_atoi(p[1]);
if (p[2])
{
options->inactivity_minimum_bytes = positive_atoi(p[2]);
}
}
else if (streq(p[0], "proto") && p[1] && !p[2])
{
int proto;
sa_family_t af;
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
proto = ascii2proto(p[1]);
af = ascii2af(p[1]);
if (proto < 0)
{
msg(msglevel, "Bad protocol: '%s'. Allowed protocols with --proto option: %s",
p[1],
proto2ascii_all(&gc));
goto err;
}
options->ce.proto = proto;
options->ce.af = af;
}
else if (streq(p[0], "proto-force") && p[1] && !p[2])
{
int proto_force;
VERIFY_PERMISSION(OPT_P_GENERAL);
proto_force = ascii2proto(p[1]);
if (proto_force < 0)
{
msg(msglevel, "Bad --proto-force protocol: '%s'", p[1]);
goto err;
}
options->proto_force = proto_force;
}
else if (streq(p[0], "http-proxy") && p[1] && !p[5])
{
struct http_proxy_options *ho;
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
{
if (!p[2])
{
msg(msglevel, "http-proxy port number not defined");
goto err;
}
ho = init_http_proxy_options_once(&options->ce.http_proxy_options, &options->gc);
ho->server = p[1];
ho->port = p[2];
}
if (p[3])
{
/* auto -- try to figure out proxy addr, port, and type automatically */
/* semiauto -- given proxy addr:port, try to figure out type automatically */
/* (auto|semiauto)-nct -- disable proxy auth cleartext protocols (i.e. basic auth) */
if (streq(p[3], "auto"))
{
ho->auth_retry = PAR_ALL;
}
else if (streq(p[3], "auto-nct"))
{
ho->auth_retry = PAR_NCT;
}
else
{
ho->auth_method_string = "basic";
ho->auth_file = p[3];
if (p[4])
{
ho->auth_method_string = p[4];
}
}
}
else
{
ho->auth_method_string = "none";
}
}
else if (streq(p[0], "http-proxy-user-pass") && p[1])
{
struct http_proxy_options *ho;
VERIFY_PERMISSION(OPT_P_GENERAL);
ho = init_http_proxy_options_once(&options->ce.http_proxy_options, &options->gc);
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
ho->auth_file = p[2];
ho->inline_creds = true;
}
else
{
ho->auth_file = p[1];
}
}
else if (streq(p[0], "http-proxy-retry") || streq(p[0], "socks-proxy-retry"))
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
msg(M_WARN, "DEPRECATED OPTION: http-proxy-retry and socks-proxy-retry: "
"In OpenVPN 2.4 proxy connection retries are handled like regular connections. "
"Use connect-retry-max 1 to get a similar behavior as before.");
}
else if (streq(p[0], "http-proxy-timeout") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
msg(M_WARN, "DEPRECATED OPTION: http-proxy-timeout: In OpenVPN 2.4 the timeout until a connection to a "
"server is established is managed with a single timeout set by connect-timeout");
}
else if (streq(p[0], "http-proxy-option") && p[1] && !p[4])
{
struct http_proxy_options *ho;
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
ho = init_http_proxy_options_once(&options->ce.http_proxy_options, &options->gc);
if (streq(p[1], "VERSION") && p[2] && !p[3])
{
ho->http_version = p[2];
}
else if (streq(p[1], "AGENT") && p[2] && !p[3])
{
ho->user_agent = p[2];
}
else if ((streq(p[1], "EXT1") || streq(p[1], "EXT2") || streq(p[1], "CUSTOM-HEADER"))
&& p[2])
{
/* In the wild patched versions use both EXT1/2 and CUSTOM-HEADER
* with either two argument or one */
struct http_custom_header *custom_header = NULL;
int i;
/* Find the first free header */
for (i = 0; i < MAX_CUSTOM_HTTP_HEADER; i++)
{
if (!ho->custom_headers[i].name)
{
custom_header = &ho->custom_headers[i];
break;
}
}
if (!custom_header)
{
msg(msglevel, "Cannot use more than %d http-proxy-option CUSTOM-HEADER : '%s'", MAX_CUSTOM_HTTP_HEADER, p[1]);
}
else
{
/* We will save p[2] and p[3], the proxy code will detect if
* p[3] is NULL */
custom_header->name = p[2];
custom_header->content = p[3];
}
}
else
{
msg(msglevel, "Bad http-proxy-option or missing or extra parameter: '%s'", p[1]);
}
}
else if (streq(p[0], "socks-proxy") && p[1] && !p[4])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
if (p[2])
{
options->ce.socks_proxy_port = p[2];
}
else
{
options->ce.socks_proxy_port = "1080";
}
options->ce.socks_proxy_server = p[1];
options->ce.socks_proxy_authfile = p[3]; /* might be NULL */
}
else if (streq(p[0], "keepalive") && p[1] && p[2] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->keepalive_ping = atoi(p[1]);
options->keepalive_timeout = atoi(p[2]);
}
else if (streq(p[0], "ping") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_TIMER);
options->ping_send_timeout = positive_atoi(p[1]);
}
else if (streq(p[0], "ping-exit") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_TIMER);
options->ping_rec_timeout = positive_atoi(p[1]);
options->ping_rec_timeout_action = PING_EXIT;
}
else if (streq(p[0], "ping-restart") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_TIMER);
options->ping_rec_timeout = positive_atoi(p[1]);
options->ping_rec_timeout_action = PING_RESTART;
}
else if (streq(p[0], "ping-timer-rem") && !p[1])
{
VERIFY_PERMISSION(OPT_P_TIMER);
options->ping_timer_remote = true;
}
#ifdef ENABLE_OCC
else if (streq(p[0], "explicit-exit-notify") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION|OPT_P_EXPLICIT_NOTIFY);
if (p[1])
{
options->ce.explicit_exit_notification = positive_atoi(p[1]);
}
else
{
options->ce.explicit_exit_notification = 1;
}
}
#endif
else if (streq(p[0], "persist-tun") && !p[1])
{
VERIFY_PERMISSION(OPT_P_PERSIST);
options->persist_tun = true;
}
else if (streq(p[0], "persist-key") && !p[1])
{
VERIFY_PERMISSION(OPT_P_PERSIST);
options->persist_key = true;
}
else if (streq(p[0], "persist-local-ip") && !p[1])
{
VERIFY_PERMISSION(OPT_P_PERSIST_IP);
options->persist_local_ip = true;
}
else if (streq(p[0], "persist-remote-ip") && !p[1])
{
VERIFY_PERMISSION(OPT_P_PERSIST_IP);
options->persist_remote_ip = true;
}
else if (streq(p[0], "client-nat") && p[1] && p[2] && p[3] && p[4] && !p[5])
{
VERIFY_PERMISSION(OPT_P_ROUTE);
cnol_check_alloc(options);
add_client_nat_to_option_list(options->client_nat, p[1], p[2], p[3], p[4], msglevel);
}
else if (streq(p[0], "route") && p[1] && !p[5])
{
VERIFY_PERMISSION(OPT_P_ROUTE);
rol_check_alloc(options);
if (pull_mode)
{
if (!ip_or_dns_addr_safe(p[1], options->allow_pull_fqdn) && !is_special_addr(p[1])) /* FQDN -- may be DNS name */
{
msg(msglevel, "route parameter network/IP '%s' must be a valid address", p[1]);
goto err;
}
if (p[2] && !ip_addr_dotted_quad_safe(p[2])) /* FQDN -- must be IP address */
{
msg(msglevel, "route parameter netmask '%s' must be an IP address", p[2]);
goto err;
}
if (p[3] && !ip_or_dns_addr_safe(p[3], options->allow_pull_fqdn) && !is_special_addr(p[3])) /* FQDN -- may be DNS name */
{
msg(msglevel, "route parameter gateway '%s' must be a valid address", p[3]);
goto err;
}
}
add_route_to_option_list(options->routes, p[1], p[2], p[3], p[4]);
}
else if (streq(p[0], "route-ipv6") && p[1] && !p[4])
{
VERIFY_PERMISSION(OPT_P_ROUTE);
rol6_check_alloc(options);
if (pull_mode)
{
if (!ipv6_addr_safe_hexplusbits(p[1]))
{
msg(msglevel, "route-ipv6 parameter network/IP '%s' must be a valid address", p[1]);
goto err;
}
if (p[2] && !ipv6_addr_safe(p[2]))
{
msg(msglevel, "route-ipv6 parameter gateway '%s' must be a valid address", p[2]);
goto err;
}
/* p[3] is metric, if present */
}
add_route_ipv6_to_option_list(options->routes_ipv6, p[1], p[2], p[3]);
}
else if (streq(p[0], "max-routes") && !p[2])
{
msg(M_WARN, "DEPRECATED OPTION: --max-routes option ignored."
"The number of routes is unlimited as of OpenVPN 2.4. "
"This option will be removed in a future version, "
"please remove it from your configuration.");
}
else if (streq(p[0], "route-gateway") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_ROUTE_EXTRAS);
if (streq(p[1], "dhcp"))
{
options->route_gateway_via_dhcp = true;
}
else
{
if (ip_or_dns_addr_safe(p[1], options->allow_pull_fqdn) || is_special_addr(p[1])) /* FQDN -- may be DNS name */
{
options->route_default_gateway = p[1];
}
else
{
msg(msglevel, "route-gateway parm '%s' must be a valid address", p[1]);
goto err;
}
}
}
else if (streq(p[0], "route-metric") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_ROUTE);
options->route_default_metric = positive_atoi(p[1]);
}
else if (streq(p[0], "route-delay") && !p[3])
{
VERIFY_PERMISSION(OPT_P_ROUTE_EXTRAS);
options->route_delay_defined = true;
if (p[1])
{
options->route_delay = positive_atoi(p[1]);
if (p[2])
{
options->route_delay_window = positive_atoi(p[2]);
}
}
else
{
options->route_delay = 0;
}
}
else if (streq(p[0], "route-up") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options, &options->route_script, p[1], "route-up", false);
}
else if (streq(p[0], "route-pre-down") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options,
&options->route_predown_script,
p[1],
"route-pre-down", true);
}
else if (streq(p[0], "route-noexec") && !p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
options->route_noexec = true;
}
else if (streq(p[0], "route-nopull") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->route_nopull = true;
}
else if (streq(p[0], "pull-filter") && p[1] && p[2] && !p[3])
{
struct pull_filter *f;
VERIFY_PERMISSION(OPT_P_GENERAL)
f = alloc_pull_filter(options, msglevel);
if (strcmp("accept", p[1]) == 0)
{
f->type = PUF_TYPE_ACCEPT;
}
else if (strcmp("ignore", p[1]) == 0)
{
f->type = PUF_TYPE_IGNORE;
}
else if (strcmp("reject", p[1]) == 0)
{
f->type = PUF_TYPE_REJECT;
}
else
{
msg(msglevel, "Unknown --pull-filter type: %s", p[1]);
goto err;
}
f->pattern = p[2];
f->size = strlen(p[2]);
}
else if (streq(p[0], "allow-pull-fqdn") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->allow_pull_fqdn = true;
}
else if (streq(p[0], "redirect-gateway") || streq(p[0], "redirect-private"))
{
int j;
VERIFY_PERMISSION(OPT_P_ROUTE);
rol_check_alloc(options);
if (streq(p[0], "redirect-gateway"))
{
options->routes->flags |= RG_REROUTE_GW;
}
for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j)
{
if (streq(p[j], "local"))
{
options->routes->flags |= RG_LOCAL;
}
else if (streq(p[j], "autolocal"))
{
options->routes->flags |= RG_AUTO_LOCAL;
}
else if (streq(p[j], "def1"))
{
options->routes->flags |= RG_DEF1;
}
else if (streq(p[j], "bypass-dhcp"))
{
options->routes->flags |= RG_BYPASS_DHCP;
}
else if (streq(p[j], "bypass-dns"))
{
options->routes->flags |= RG_BYPASS_DNS;
}
else if (streq(p[j], "block-local"))
{
options->routes->flags |= RG_BLOCK_LOCAL;
}
else if (streq(p[j], "ipv6"))
{
rol6_check_alloc(options);
options->routes_ipv6->flags |= RG_REROUTE_GW;
}
else if (streq(p[j], "!ipv4"))
{
options->routes->flags &= ~RG_REROUTE_GW;
}
else
{
msg(msglevel, "unknown --%s flag: %s", p[0], p[j]);
goto err;
}
}
#ifdef _WIN32
/* we need this here to handle pushed --redirect-gateway */
remap_redirect_gateway_flags(options);
#endif
options->routes->flags |= RG_ENABLE;
}
else if (streq(p[0], "remote-random-hostname") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->sockflags |= SF_HOST_RANDOMIZE;
}
else if (streq(p[0], "setenv") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], "REMOTE_RANDOM_HOSTNAME") && !p[2])
{
options->sockflags |= SF_HOST_RANDOMIZE;
}
else if (streq(p[1], "GENERIC_CONFIG"))
{
msg(msglevel, "this is a generic configuration and cannot directly be used");
goto err;
}
else if (streq(p[1], "PUSH_PEER_INFO") && !p[2])
{
options->push_peer_info = true;
}
else if (streq(p[1], "SERVER_POLL_TIMEOUT") && p[2])
{
options->ce.connect_timeout = positive_atoi(p[2]);
}
else
{
if (streq(p[1], "FORWARD_COMPATIBLE") && p[2] && streq(p[2], "1"))
{
options->forward_compatible = true;
msglevel_fc = msglevel_forward_compatible(options, msglevel);
}
setenv_str(es, p[1], p[2] ? p[2] : "");
}
}
else if (streq(p[0], "setenv-safe") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_SETENV);
setenv_str_safe(es, p[1], p[2] ? p[2] : "");
}
else if (streq(p[0], "script-security") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
script_security_set(atoi(p[1]));
}
else if (streq(p[0], "mssfix") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_CONNECTION);
if (p[1])
{
options->ce.mssfix = positive_atoi(p[1]);
}
else
{
options->ce.mssfix_default = true;
}
}
#ifdef ENABLE_OCC
else if (streq(p[0], "disable-occ") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->occ = false;
}
#endif
#if P2MP
#if P2MP_SERVER
else if (streq(p[0], "server") && p[1] && p[2] && !p[4])
{
const int lev = M_WARN;
bool error = false;
in_addr_t network, netmask;
VERIFY_PERMISSION(OPT_P_GENERAL);
network = get_ip_addr(p[1], lev, &error);
netmask = get_ip_addr(p[2], lev, &error);
if (error || !network || !netmask)
{
msg(msglevel, "error parsing --server parameters");
goto err;
}
options->server_defined = true;
options->server_network = network;
options->server_netmask = netmask;
if (p[3])
{
if (streq(p[3], "nopool"))
{
options->server_flags |= SF_NOPOOL;
}
else
{
msg(msglevel, "error parsing --server: %s is not a recognized flag", p[3]);
goto err;
}
}
}
else if (streq(p[0], "server-ipv6") && p[1] && !p[3])
{
const int lev = M_WARN;
struct in6_addr network;
unsigned int netbits = 0;
VERIFY_PERMISSION(OPT_P_GENERAL);
if (!get_ipv6_addr(p[1], &network, &netbits, lev) )
{
msg(msglevel, "error parsing --server-ipv6 parameter");
goto err;
}
if (netbits < 64 || netbits > 112)
{
msg( msglevel, "--server-ipv6 settings: only /64../112 supported right now (not /%d)", netbits );
goto err;
}
options->server_ipv6_defined = true;
options->server_network_ipv6 = network;
options->server_netbits_ipv6 = netbits;
if (p[2]) /* no "nopool" options or similar for IPv6 */
{
msg(msglevel, "error parsing --server-ipv6: %s is not a recognized flag", p[3]);
goto err;
}
}
else if (streq(p[0], "server-bridge") && p[1] && p[2] && p[3] && p[4] && !p[5])
{
const int lev = M_WARN;
bool error = false;
in_addr_t ip, netmask, pool_start, pool_end;
VERIFY_PERMISSION(OPT_P_GENERAL);
ip = get_ip_addr(p[1], lev, &error);
netmask = get_ip_addr(p[2], lev, &error);
pool_start = get_ip_addr(p[3], lev, &error);
pool_end = get_ip_addr(p[4], lev, &error);
if (error || !ip || !netmask || !pool_start || !pool_end)
{
msg(msglevel, "error parsing --server-bridge parameters");
goto err;
}
options->server_bridge_defined = true;
options->server_bridge_ip = ip;
options->server_bridge_netmask = netmask;
options->server_bridge_pool_start = pool_start;
options->server_bridge_pool_end = pool_end;
}
else if (streq(p[0], "server-bridge") && p[1] && streq(p[1], "nogw") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->server_bridge_proxy_dhcp = true;
options->server_flags |= SF_NO_PUSH_ROUTE_GATEWAY;
}
else if (streq(p[0], "server-bridge") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->server_bridge_proxy_dhcp = true;
}
else if (streq(p[0], "push") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_PUSH);
push_options(options, &p[1], msglevel, &options->gc);
}
else if (streq(p[0], "push-reset") && !p[1])
{
VERIFY_PERMISSION(OPT_P_INSTANCE);
push_reset(options);
}
else if (streq(p[0], "push-remove") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_INSTANCE);
msg(D_PUSH, "PUSH_REMOVE '%s'", p[1]);
push_remove_option(options,p[1]);
}
else if (streq(p[0], "ifconfig-pool") && p[1] && p[2] && !p[4])
{
const int lev = M_WARN;
bool error = false;
in_addr_t start, end, netmask = 0;
VERIFY_PERMISSION(OPT_P_GENERAL);
start = get_ip_addr(p[1], lev, &error);
end = get_ip_addr(p[2], lev, &error);
if (p[3])
{
netmask = get_ip_addr(p[3], lev, &error);
}
if (error)
{
msg(msglevel, "error parsing --ifconfig-pool parameters");
goto err;
}
if (!ifconfig_pool_verify_range(msglevel, start, end))
{
goto err;
}
options->ifconfig_pool_defined = true;
options->ifconfig_pool_start = start;
options->ifconfig_pool_end = end;
if (netmask)
{
options->ifconfig_pool_netmask = netmask;
}
}
else if (streq(p[0], "ifconfig-pool-persist") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ifconfig_pool_persist_filename = p[1];
if (p[2])
{
options->ifconfig_pool_persist_refresh_freq = positive_atoi(p[2]);
}
}
else if (streq(p[0], "ifconfig-pool-linear") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->topology = TOP_P2P;
msg(M_WARN, "DEPRECATED OPTION: --ifconfig-pool-linear, use --topology p2p instead");
}
else if (streq(p[0], "ifconfig-ipv6-pool") && p[1] && !p[2])
{
const int lev = M_WARN;
struct in6_addr network;
unsigned int netbits = 0;
VERIFY_PERMISSION(OPT_P_GENERAL);
if (!get_ipv6_addr(p[1], &network, &netbits, lev ) )
{
msg(msglevel, "error parsing --ifconfig-ipv6-pool parameters");
goto err;
}
if (netbits < 64 || netbits > 112)
{
msg( msglevel, "--ifconfig-ipv6-pool settings: only /64../112 supported right now (not /%d)", netbits );
goto err;
}
options->ifconfig_ipv6_pool_defined = true;
options->ifconfig_ipv6_pool_base = network;
options->ifconfig_ipv6_pool_netbits = netbits;
}
else if (streq(p[0], "hash-size") && p[1] && p[2] && !p[3])
{
int real, virtual;
VERIFY_PERMISSION(OPT_P_GENERAL);
real = atoi(p[1]);
virtual = atoi(p[2]);
if (real < 1 || virtual < 1)
{
msg(msglevel, "--hash-size sizes must be >= 1 (preferably a power of 2)");
goto err;
}
options->real_hash_size = real;
options->virtual_hash_size = real;
}
else if (streq(p[0], "connect-freq") && p[1] && p[2] && !p[3])
{
int cf_max, cf_per;
VERIFY_PERMISSION(OPT_P_GENERAL);
cf_max = atoi(p[1]);
cf_per = atoi(p[2]);
if (cf_max < 0 || cf_per < 0)
{
msg(msglevel, "--connect-freq parms must be > 0");
goto err;
}
options->cf_max = cf_max;
options->cf_per = cf_per;
}
else if (streq(p[0], "max-clients") && p[1] && !p[2])
{
int max_clients;
VERIFY_PERMISSION(OPT_P_GENERAL);
max_clients = atoi(p[1]);
if (max_clients < 0)
{
msg(msglevel, "--max-clients must be at least 1");
goto err;
}
if (max_clients >= MAX_PEER_ID) /* max peer-id value */
{
msg(msglevel, "--max-clients must be less than %d", MAX_PEER_ID);
goto err;
}
options->max_clients = max_clients;
}
else if (streq(p[0], "max-routes-per-client") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_INHERIT);
options->max_routes_per_client = max_int(atoi(p[1]), 1);
}
else if (streq(p[0], "client-cert-not-required") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ssl_flags |= SSLF_CLIENT_CERT_NOT_REQUIRED;
msg(M_WARN, "DEPRECATED OPTION: --client-cert-not-required, use --verify-client-cert instead");
}
else if (streq(p[0], "verify-client-cert") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
/* Reset any existing flags */
options->ssl_flags &= ~SSLF_CLIENT_CERT_OPTIONAL;
options->ssl_flags &= ~SSLF_CLIENT_CERT_NOT_REQUIRED;
if (p[1])
{
if (streq(p[1], "none"))
{
options->ssl_flags |= SSLF_CLIENT_CERT_NOT_REQUIRED;
}
else if (streq(p[1], "optional"))
{
options->ssl_flags |= SSLF_CLIENT_CERT_OPTIONAL;
}
else if (!streq(p[1], "require"))
{
msg(msglevel, "parameter to --verify-client-cert must be 'none', 'optional' or 'require'");
goto err;
}
}
}
else if (streq(p[0], "username-as-common-name") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ssl_flags |= SSLF_USERNAME_AS_COMMON_NAME;
}
else if (streq(p[0], "auth-user-pass-optional") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ssl_flags |= SSLF_AUTH_USER_PASS_OPTIONAL;
}
else if (streq(p[0], "opt-verify") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ssl_flags |= SSLF_OPT_VERIFY;
}
else if (streq(p[0], "auth-user-pass-verify") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 3, NM_QUOTE_HINT))
{
goto err;
}
if (p[2])
{
if (streq(p[2], "via-env"))
{
options->auth_user_pass_verify_script_via_file = false;
}
else if (streq(p[2], "via-file"))
{
options->auth_user_pass_verify_script_via_file = true;
}
else
{
msg(msglevel, "second parm to --auth-user-pass-verify must be 'via-env' or 'via-file'");
goto err;
}
}
else
{
msg(msglevel, "--auth-user-pass-verify requires a second parameter ('via-env' or 'via-file')");
goto err;
}
set_user_script(options,
&options->auth_user_pass_verify_script,
p[1], "auth-user-pass-verify", true);
}
else if (streq(p[0], "auth-gen-token"))
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->auth_token_generate = true;
options->auth_token_lifetime = p[1] ? positive_atoi(p[1]) : 0;
}
else if (streq(p[0], "client-connect") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options, &options->client_connect_script,
p[1], "client-connect", true);
}
else if (streq(p[0], "client-disconnect") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options, &options->client_disconnect_script,
p[1], "client-disconnect", true);
}
else if (streq(p[0], "learn-address") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options, &options->learn_address_script,
p[1], "learn-address", true);
}
else if (streq(p[0], "tmp-dir") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->tmp_dir = p[1];
}
else if (streq(p[0], "client-config-dir") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->client_config_dir = p[1];
}
else if (streq(p[0], "ccd-exclusive") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ccd_exclusive = true;
}
else if (streq(p[0], "bcast-buffers") && p[1] && !p[2])
{
int n_bcast_buf;
VERIFY_PERMISSION(OPT_P_GENERAL);
n_bcast_buf = atoi(p[1]);
if (n_bcast_buf < 1)
{
msg(msglevel, "--bcast-buffers parameter must be > 0");
}
options->n_bcast_buf = n_bcast_buf;
}
else if (streq(p[0], "tcp-queue-limit") && p[1] && !p[2])
{
int tcp_queue_limit;
VERIFY_PERMISSION(OPT_P_GENERAL);
tcp_queue_limit = atoi(p[1]);
if (tcp_queue_limit < 1)
{
msg(msglevel, "--tcp-queue-limit parameter must be > 0");
}
options->tcp_queue_limit = tcp_queue_limit;
}
#if PORT_SHARE
else if (streq(p[0], "port-share") && p[1] && p[2] && !p[4])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->port_share_host = p[1];
options->port_share_port = p[2];
options->port_share_journal_dir = p[3];
}
#endif
else if (streq(p[0], "client-to-client") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->enable_c2c = true;
}
else if (streq(p[0], "duplicate-cn") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->duplicate_cn = true;
}
else if (streq(p[0], "iroute") && p[1] && !p[3])
{
const char *netmask = NULL;
VERIFY_PERMISSION(OPT_P_INSTANCE);
if (p[2])
{
netmask = p[2];
}
option_iroute(options, p[1], netmask, msglevel);
}
else if (streq(p[0], "iroute-ipv6") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_INSTANCE);
option_iroute_ipv6(options, p[1], msglevel);
}
else if (streq(p[0], "ifconfig-push") && p[1] && p[2] && !p[4])
{
in_addr_t local, remote_netmask;
VERIFY_PERMISSION(OPT_P_INSTANCE);
local = getaddr(GETADDR_HOST_ORDER|GETADDR_RESOLVE, p[1], 0, NULL, NULL);
remote_netmask = getaddr(GETADDR_HOST_ORDER|GETADDR_RESOLVE, p[2], 0, NULL, NULL);
if (local && remote_netmask)
{
options->push_ifconfig_defined = true;
options->push_ifconfig_local = local;
options->push_ifconfig_remote_netmask = remote_netmask;
if (p[3])
{
options->push_ifconfig_local_alias = getaddr(GETADDR_HOST_ORDER|GETADDR_RESOLVE, p[3], 0, NULL, NULL);
}
}
else
{
msg(msglevel, "cannot parse --ifconfig-push addresses");
goto err;
}
}
else if (streq(p[0], "ifconfig-push-constraint") && p[1] && p[2] && !p[3])
{
in_addr_t network, netmask;
VERIFY_PERMISSION(OPT_P_GENERAL);
network = getaddr(GETADDR_HOST_ORDER|GETADDR_RESOLVE, p[1], 0, NULL, NULL);
netmask = getaddr(GETADDR_HOST_ORDER, p[2], 0, NULL, NULL);
if (network && netmask)
{
options->push_ifconfig_constraint_defined = true;
options->push_ifconfig_constraint_network = network;
options->push_ifconfig_constraint_netmask = netmask;
}
else
{
msg(msglevel, "cannot parse --ifconfig-push-constraint addresses");
goto err;
}
}
else if (streq(p[0], "ifconfig-ipv6-push") && p[1] && !p[3])
{
struct in6_addr local, remote;
unsigned int netbits;
VERIFY_PERMISSION(OPT_P_INSTANCE);
if (!get_ipv6_addr( p[1], &local, &netbits, msglevel ) )
{
msg(msglevel, "cannot parse --ifconfig-ipv6-push addresses");
goto err;
}
if (p[2])
{
if (!get_ipv6_addr( p[2], &remote, NULL, msglevel ) )
{
msg( msglevel, "cannot parse --ifconfig-ipv6-push addresses");
goto err;
}
}
else
{
if (!options->ifconfig_ipv6_local
|| !get_ipv6_addr( options->ifconfig_ipv6_local, &remote,
NULL, msglevel ) )
{
msg( msglevel, "second argument to --ifconfig-ipv6-push missing and no global --ifconfig-ipv6 address set");
goto err;
}
}
options->push_ifconfig_ipv6_defined = true;
options->push_ifconfig_ipv6_local = local;
options->push_ifconfig_ipv6_netbits = netbits;
options->push_ifconfig_ipv6_remote = remote;
options->push_ifconfig_ipv6_blocked = false;
}
else if (streq(p[0], "disable") && !p[1])
{
VERIFY_PERMISSION(OPT_P_INSTANCE);
options->disable = true;
}
else if (streq(p[0], "tcp-nodelay") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->server_flags |= SF_TCP_NODELAY_HELPER;
}
else if (streq(p[0], "stale-routes-check") && p[1] && !p[3])
{
int ageing_time, check_interval;
VERIFY_PERMISSION(OPT_P_GENERAL);
ageing_time = atoi(p[1]);
if (p[2])
{
check_interval = atoi(p[2]);
}
else
{
check_interval = ageing_time;
}
if (ageing_time < 1 || check_interval < 1)
{
msg(msglevel, "--stale-routes-check aging time and check interval must be >= 1");
goto err;
}
options->stale_routes_ageing_time = ageing_time;
options->stale_routes_check_interval = check_interval;
}
#endif /* P2MP_SERVER */
else if (streq(p[0], "client") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->client = true;
}
else if (streq(p[0], "pull") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->pull = true;
}
else if (streq(p[0], "push-continuation") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_PULL_MODE);
options->push_continuation = atoi(p[1]);
}
else if (streq(p[0], "auth-user-pass") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (p[1])
{
options->auth_user_pass_file = p[1];
}
else
{
options->auth_user_pass_file = "stdin";
}
}
else if (streq(p[0], "auth-retry") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
auth_retry_set(msglevel, p[1]);
}
#ifdef ENABLE_CLIENT_CR
else if (streq(p[0], "static-challenge") && p[1] && p[2] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->sc_info.challenge_text = p[1];
if (atoi(p[2]))
{
options->sc_info.flags |= SC_ECHO;
}
}
#endif
#endif /* if P2MP */
else if (streq(p[0], "msg-channel") && p[1])
{
#ifdef _WIN32
VERIFY_PERMISSION(OPT_P_GENERAL);
HANDLE process = GetCurrentProcess();
HANDLE handle = (HANDLE) atoi(p[1]);
if (!DuplicateHandle(process, handle, process, &options->msg_channel, 0,
FALSE, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS))
{
msg(msglevel, "could not duplicate service pipe handle");
goto err;
}
options->route_method = ROUTE_METHOD_SERVICE;
#else /* ifdef _WIN32 */
msg(msglevel, "--msg-channel is only supported on Windows");
goto err;
#endif
}
#ifdef _WIN32
else if (streq(p[0], "win-sys") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], "env"))
{
msg(M_INFO, "NOTE: --win-sys env is default from OpenVPN 2.3. "
"This entry will now be ignored. "
"Please remove this entry from your configuration file.");
}
else
{
set_win_sys_path(p[1], es);
}
}
else if (streq(p[0], "route-method") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_ROUTE_EXTRAS);
if (streq(p[1], "adaptive"))
{
options->route_method = ROUTE_METHOD_ADAPTIVE;
}
else if (streq(p[1], "ipapi"))
{
options->route_method = ROUTE_METHOD_IPAPI;
}
else if (streq(p[1], "exe"))
{
options->route_method = ROUTE_METHOD_EXE;
}
else
{
msg(msglevel, "--route method must be 'adaptive', 'ipapi', or 'exe'");
goto err;
}
}
else if (streq(p[0], "ip-win32") && p[1] && !p[4])
{
const int index = ascii2ipset(p[1]);
struct tuntap_options *to = &options->tuntap_options;
VERIFY_PERMISSION(OPT_P_IPWIN32);
if (index < 0)
{
msg(msglevel,
"Bad --ip-win32 method: '%s'. Allowed methods: %s",
p[1],
ipset2ascii_all(&gc));
goto err;
}
if (index == IPW32_SET_ADAPTIVE)
{
options->route_delay_window = IPW32_SET_ADAPTIVE_DELAY_WINDOW;
}
if (index == IPW32_SET_DHCP_MASQ)
{
if (p[2])
{
if (!streq(p[2], "default"))
{
int offset = atoi(p[2]);
if (!(offset > -256 && offset < 256))
{
msg(msglevel, "--ip-win32 dynamic [offset] [lease-time]: offset (%d) must be > -256 and < 256", offset);
goto err;
}
to->dhcp_masq_custom_offset = true;
to->dhcp_masq_offset = offset;
}
if (p[3])
{
const int min_lease = 30;
int lease_time;
lease_time = atoi(p[3]);
if (lease_time < min_lease)
{
msg(msglevel, "--ip-win32 dynamic [offset] [lease-time]: lease time parameter (%d) must be at least %d seconds", lease_time, min_lease);
goto err;
}
to->dhcp_lease_time = lease_time;
}
}
}
to->ip_win32_type = index;
to->ip_win32_defined = true;
}
#endif /* ifdef _WIN32 */
#if defined(_WIN32) || defined(TARGET_ANDROID)
else if (streq(p[0], "dhcp-option") && p[1] && !p[3])
{
struct tuntap_options *o = &options->tuntap_options;
VERIFY_PERMISSION(OPT_P_IPWIN32);
bool ipv6dns = false;
if (streq(p[1], "DOMAIN") && p[2])
{
o->domain = p[2];
}
else if (streq(p[1], "NBS") && p[2])
{
o->netbios_scope = p[2];
}
else if (streq(p[1], "NBT") && p[2])
{
int t;
t = atoi(p[2]);
if (!(t == 1 || t == 2 || t == 4 || t == 8))
{
msg(msglevel, "--dhcp-option NBT: parameter (%d) must be 1, 2, 4, or 8", t);
goto err;
}
o->netbios_node_type = t;
}
else if ((streq(p[1], "DNS") || streq(p[1], "DNS6")) && p[2] && (!strstr(p[2], ":") || ipv6_addr_safe(p[2])))
{
if (strstr(p[2], ":"))
{
ipv6dns=true;
foreign_option(options, p, 3, es);
dhcp_option_dns6_parse(p[2], o->dns6, &o->dns6_len, msglevel);
}
else
{
dhcp_option_address_parse("DNS", p[2], o->dns, &o->dns_len, msglevel);
}
}
else if (streq(p[1], "WINS") && p[2])
{
dhcp_option_address_parse("WINS", p[2], o->wins, &o->wins_len, msglevel);
}
else if (streq(p[1], "NTP") && p[2])
{
dhcp_option_address_parse("NTP", p[2], o->ntp, &o->ntp_len, msglevel);
}
else if (streq(p[1], "NBDD") && p[2])
{
dhcp_option_address_parse("NBDD", p[2], o->nbdd, &o->nbdd_len, msglevel);
}
else if (streq(p[1], "DISABLE-NBT") && !p[2])
{
o->disable_nbt = 1;
}
else
{
msg(msglevel, "--dhcp-option: unknown option type '%s' or missing or unknown parameter", p[1]);
goto err;
}
/* flag that we have options to give to the TAP driver's DHCPv4 server
* - skipped for "DNS6", as that's not a DHCPv4 option
*/
if (!ipv6dns)
{
o->dhcp_options = true;
}
}
#endif /* if defined(_WIN32) || defined(TARGET_ANDROID) */
#ifdef _WIN32
else if (streq(p[0], "show-adapters") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
show_tap_win_adapters(M_INFO|M_NOPREFIX, M_WARN|M_NOPREFIX);
openvpn_exit(OPENVPN_EXIT_STATUS_GOOD); /* exit point */
}
else if (streq(p[0], "show-net") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
show_routes(M_INFO|M_NOPREFIX);
show_adapters(M_INFO|M_NOPREFIX);
openvpn_exit(OPENVPN_EXIT_STATUS_GOOD); /* exit point */
}
else if (streq(p[0], "show-net-up") && !p[1])
{
VERIFY_PERMISSION(OPT_P_UP);
options->show_net_up = true;
}
else if (streq(p[0], "tap-sleep") && p[1] && !p[2])
{
int s;
VERIFY_PERMISSION(OPT_P_IPWIN32);
s = atoi(p[1]);
if (s < 0 || s >= 256)
{
msg(msglevel, "--tap-sleep parameter must be between 0 and 255");
goto err;
}
options->tuntap_options.tap_sleep = s;
}
else if (streq(p[0], "dhcp-renew") && !p[1])
{
VERIFY_PERMISSION(OPT_P_IPWIN32);
options->tuntap_options.dhcp_renew = true;
}
else if (streq(p[0], "dhcp-pre-release") && !p[1])
{
VERIFY_PERMISSION(OPT_P_IPWIN32);
options->tuntap_options.dhcp_pre_release = true;
options->tuntap_options.dhcp_renew = true;
}
else if (streq(p[0], "dhcp-release") && !p[1])
{
msg(M_WARN, "Obsolete option --dhcp-release detected. This is now on by default");
}
else if (streq(p[0], "dhcp-internal") && p[1] && !p[2]) /* standalone method for internal use */
{
unsigned int adapter_index;
VERIFY_PERMISSION(OPT_P_GENERAL);
set_debug_level(options->verbosity, SDL_CONSTRAIN);
adapter_index = atou(p[1]);
sleep(options->tuntap_options.tap_sleep);
if (options->tuntap_options.dhcp_pre_release)
{
dhcp_release_by_adapter_index(adapter_index);
}
if (options->tuntap_options.dhcp_renew)
{
dhcp_renew_by_adapter_index(adapter_index);
}
openvpn_exit(OPENVPN_EXIT_STATUS_GOOD); /* exit point */
}
else if (streq(p[0], "register-dns") && !p[1])
{
VERIFY_PERMISSION(OPT_P_IPWIN32);
options->tuntap_options.register_dns = true;
}
else if (streq(p[0], "block-outside-dns") && !p[1])
{
VERIFY_PERMISSION(OPT_P_IPWIN32);
options->block_outside_dns = true;
}
else if (streq(p[0], "rdns-internal") && !p[1])
/* standalone method for internal use
*
* (if --register-dns is set, openvpn needs to call itself in a
* sub-process to execute the required functions in a non-blocking
* way, and uses --rdns-internal to signal that to itself)
*/
{
VERIFY_PERMISSION(OPT_P_GENERAL);
set_debug_level(options->verbosity, SDL_CONSTRAIN);
if (options->tuntap_options.register_dns)
{
ipconfig_register_dns(NULL);
}
openvpn_exit(OPENVPN_EXIT_STATUS_GOOD); /* exit point */
}
else if (streq(p[0], "show-valid-subnets") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
show_valid_win32_tun_subnets();
openvpn_exit(OPENVPN_EXIT_STATUS_GOOD); /* exit point */
}
else if (streq(p[0], "pause-exit") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
set_pause_exit_win32();
}
else if (streq(p[0], "service") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->exit_event_name = p[1];
if (p[2])
{
options->exit_event_initial_state = (atoi(p[2]) != 0);
}
}
else if (streq(p[0], "allow-nonadmin") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
tap_allow_nonadmin_access(p[1]);
openvpn_exit(OPENVPN_EXIT_STATUS_GOOD); /* exit point */
}
else if (streq(p[0], "user") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
msg(M_WARN, "NOTE: --user option is not implemented on Windows");
}
else if (streq(p[0], "group") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
msg(M_WARN, "NOTE: --group option is not implemented on Windows");
}
#else /* ifdef _WIN32 */
else if (streq(p[0], "user") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->username = p[1];
}
else if (streq(p[0], "group") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->groupname = p[1];
}
else if (streq(p[0], "dhcp-option") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_IPWIN32);
foreign_option(options, p, 3, es);
}
else if (streq(p[0], "route-method") && p[1] && !p[2]) /* ignore when pushed to non-Windows OS */
{
VERIFY_PERMISSION(OPT_P_ROUTE_EXTRAS);
}
#endif /* ifdef _WIN32 */
#if PASSTOS_CAPABILITY
else if (streq(p[0], "passtos") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->passtos = true;
}
#endif
#if defined(USE_COMP)
else if (streq(p[0], "comp-lzo") && !p[2])
{
VERIFY_PERMISSION(OPT_P_COMP);
#if defined(ENABLE_LZO)
if (p[1] && streq(p[1], "no"))
#endif
{
options->comp.alg = COMP_ALG_STUB;
options->comp.flags = 0;
}
#if defined(ENABLE_LZO)
else if (p[1])
{
if (streq(p[1], "yes"))
{
options->comp.alg = COMP_ALG_LZO;
options->comp.flags = 0;
}
else if (streq(p[1], "adaptive"))
{
options->comp.alg = COMP_ALG_LZO;
options->comp.flags = COMP_F_ADAPTIVE;
}
else
{
msg(msglevel, "bad comp-lzo option: %s -- must be 'yes', 'no', or 'adaptive'", p[1]);
goto err;
}
}
else
{
options->comp.alg = COMP_ALG_LZO;
options->comp.flags = COMP_F_ADAPTIVE;
}
#endif /* if defined(ENABLE_LZO) */
}
else if (streq(p[0], "comp-noadapt") && !p[1])
{
VERIFY_PERMISSION(OPT_P_COMP);
options->comp.flags &= ~COMP_F_ADAPTIVE;
}
else if (streq(p[0], "compress") && !p[2])
{
VERIFY_PERMISSION(OPT_P_COMP);
if (p[1])
{
if (streq(p[1], "stub"))
{
options->comp.alg = COMP_ALG_STUB;
options->comp.flags = (COMP_F_SWAP|COMP_F_ADVERTISE_STUBS_ONLY);
}
else if (streq(p[1], "stub-v2"))
{
options->comp.alg = COMP_ALGV2_UNCOMPRESSED;
options->comp.flags = COMP_F_ADVERTISE_STUBS_ONLY;
}
#if defined(ENABLE_LZO)
else if (streq(p[1], "lzo"))
{
options->comp.alg = COMP_ALG_LZO;
options->comp.flags = 0;
}
#endif
#if defined(ENABLE_LZ4)
else if (streq(p[1], "lz4"))
{
options->comp.alg = COMP_ALG_LZ4;
options->comp.flags = COMP_F_SWAP;
}
else if (streq(p[1], "lz4-v2"))
{
options->comp.alg = COMP_ALGV2_LZ4;
options->comp.flags = 0;
}
#endif
else
{
msg(msglevel, "bad comp option: %s", p[1]);
goto err;
}
}
else
{
options->comp.alg = COMP_ALG_STUB;
options->comp.flags = COMP_F_SWAP;
}
}
#endif /* USE_COMP */
else if (streq(p[0], "show-ciphers") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->show_ciphers = true;
}
else if (streq(p[0], "show-digests") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->show_digests = true;
}
else if (streq(p[0], "show-engines") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->show_engines = true;
}
else if (streq(p[0], "key-direction") && p[1] && !p[2])
{
int key_direction;
key_direction = ascii2keydirection(msglevel, p[1]);
if (key_direction >= 0)
{
options->key_direction = key_direction;
}
else
{
goto err;
}
}
else if (streq(p[0], "secret") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->shared_secret_file_inline = p[2];
}
else if (p[2])
{
int key_direction;
key_direction = ascii2keydirection(msglevel, p[2]);
if (key_direction >= 0)
{
options->key_direction = key_direction;
}
else
{
goto err;
}
}
options->shared_secret_file = p[1];
}
else if (streq(p[0], "genkey") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->genkey = true;
}
else if (streq(p[0], "auth") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->authname = p[1];
}
else if (streq(p[0], "cipher") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_NCP);
options->ciphername = p[1];
}
else if (streq(p[0], "ncp-ciphers") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_INSTANCE);
options->ncp_ciphers = p[1];
}
else if (streq(p[0], "ncp-disable") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL|OPT_P_INSTANCE);
options->ncp_enabled = false;
}
else if (streq(p[0], "prng") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], "none"))
{
options->prng_hash = NULL;
}
else
{
options->prng_hash = p[1];
}
if (p[2])
{
const int sl = atoi(p[2]);
if (sl >= NONCE_SECRET_LEN_MIN && sl <= NONCE_SECRET_LEN_MAX)
{
options->prng_nonce_secret_len = sl;
}
else
{
msg(msglevel, "prng parameter nonce_secret_len must be between %d and %d",
NONCE_SECRET_LEN_MIN, NONCE_SECRET_LEN_MAX);
goto err;
}
}
}
else if (streq(p[0], "no-replay") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->replay = false;
}
else if (streq(p[0], "replay-window") && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (p[1])
{
int replay_window;
replay_window = atoi(p[1]);
if (!(MIN_SEQ_BACKTRACK <= replay_window && replay_window <= MAX_SEQ_BACKTRACK))
{
msg(msglevel, "replay-window window size parameter (%d) must be between %d and %d",
replay_window,
MIN_SEQ_BACKTRACK,
MAX_SEQ_BACKTRACK);
goto err;
}
options->replay_window = replay_window;
if (p[2])
{
int replay_time;
replay_time = atoi(p[2]);
if (!(MIN_TIME_BACKTRACK <= replay_time && replay_time <= MAX_TIME_BACKTRACK))
{
msg(msglevel, "replay-window time window parameter (%d) must be between %d and %d",
replay_time,
MIN_TIME_BACKTRACK,
MAX_TIME_BACKTRACK);
goto err;
}
options->replay_time = replay_time;
}
}
else
{
msg(msglevel, "replay-window option is missing window size parameter");
goto err;
}
}
else if (streq(p[0], "mute-replay-warnings") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->mute_replay_warnings = true;
}
else if (streq(p[0], "no-iv") && !p[1])
{
msg(msglevel,
"--no-iv is no longer supported. Remove it from client and server configs.");
}
else if (streq(p[0], "replay-persist") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->packet_id_file = p[1];
}
else if (streq(p[0], "test-crypto") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->test_crypto = true;
}
#ifndef ENABLE_CRYPTO_MBEDTLS
else if (streq(p[0], "engine") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (p[1])
{
options->engine = p[1];
}
else
{
options->engine = "auto";
}
}
#endif /* ENABLE_CRYPTO_MBEDTLS */
#ifdef HAVE_EVP_CIPHER_CTX_SET_KEY_LENGTH
else if (streq(p[0], "keysize") && p[1] && !p[2])
{
int keysize;
VERIFY_PERMISSION(OPT_P_NCP);
keysize = atoi(p[1]) / 8;
if (keysize < 0 || keysize > MAX_CIPHER_KEY_LENGTH)
{
msg(msglevel, "Bad keysize: %s", p[1]);
goto err;
}
options->keysize = keysize;
}
#endif
#ifdef ENABLE_PREDICTION_RESISTANCE
else if (streq(p[0], "use-prediction-resistance") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->use_prediction_resistance = true;
}
#endif
else if (streq(p[0], "show-tls") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->show_tls_ciphers = true;
}
else if (streq(p[0], "show-curves") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->show_curves = true;
}
else if (streq(p[0], "ecdh-curve") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ecdh_curve = p[1];
}
else if (streq(p[0], "tls-server") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->tls_server = true;
}
else if (streq(p[0], "tls-client") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->tls_client = true;
}
else if (streq(p[0], "ca") && p[1] && ((streq(p[1], INLINE_FILE_TAG) && p[2]) || !p[2]) && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ca_file = p[1];
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->ca_file_inline = p[2];
}
}
#ifndef ENABLE_CRYPTO_MBEDTLS
else if (streq(p[0], "capath") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->ca_path = p[1];
}
#endif /* ENABLE_CRYPTO_MBEDTLS */
else if (streq(p[0], "dh") && p[1] && ((streq(p[1], INLINE_FILE_TAG) && p[2]) || !p[2]) && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->dh_file = p[1];
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->dh_file_inline = p[2];
}
}
else if (streq(p[0], "cert") && p[1] && ((streq(p[1], INLINE_FILE_TAG) && p[2]) || !p[2]) && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->cert_file = p[1];
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->cert_file_inline = p[2];
}
}
else if (streq(p[0], "extra-certs") && p[1] && ((streq(p[1], INLINE_FILE_TAG) && p[2]) || !p[2]) && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->extra_certs_file = p[1];
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->extra_certs_file_inline = p[2];
}
}
else if (streq(p[0], "verify-hash") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (!p[2] || (p[2] && streq(p[2], "SHA1")))
{
options->verify_hash = parse_hash_fingerprint(p[1], SHA_DIGEST_LENGTH, msglevel, &options->gc);
options->verify_hash_algo = MD_SHA1;
}
else if (p[2] && streq(p[2], "SHA256"))
{
options->verify_hash = parse_hash_fingerprint(p[1], SHA256_DIGEST_LENGTH, msglevel, &options->gc);
options->verify_hash_algo = MD_SHA256;
}
else
{
msg(msglevel, "invalid or unsupported hashing algorithm: %s (only SHA1 and SHA256 are valid)", p[2]);
goto err;
}
}
#ifdef ENABLE_CRYPTOAPI
else if (streq(p[0], "cryptoapicert") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->cryptoapi_cert = p[1];
}
#endif
else if (streq(p[0], "key") && p[1] && ((streq(p[1], INLINE_FILE_TAG) && p[2]) || !p[2]) && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->priv_key_file = p[1];
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->priv_key_file_inline = p[2];
}
}
else if (streq(p[0], "tls-version-min") && p[1] && !p[3])
{
int ver;
VERIFY_PERMISSION(OPT_P_GENERAL);
ver = tls_version_parse(p[1], p[2]);
if (ver == TLS_VER_BAD)
{
msg(msglevel, "unknown tls-version-min parameter: %s", p[1]);
goto err;
}
options->ssl_flags &=
~(SSLF_TLS_VERSION_MIN_MASK << SSLF_TLS_VERSION_MIN_SHIFT);
options->ssl_flags |= (ver << SSLF_TLS_VERSION_MIN_SHIFT);
}
else if (streq(p[0], "tls-version-max") && p[1] && !p[2])
{
int ver;
VERIFY_PERMISSION(OPT_P_GENERAL);
ver = tls_version_parse(p[1], NULL);
if (ver == TLS_VER_BAD)
{
msg(msglevel, "unknown tls-version-max parameter: %s", p[1]);
goto err;
}
options->ssl_flags &=
~(SSLF_TLS_VERSION_MAX_MASK << SSLF_TLS_VERSION_MAX_SHIFT);
options->ssl_flags |= (ver << SSLF_TLS_VERSION_MAX_SHIFT);
}
#ifndef ENABLE_CRYPTO_MBEDTLS
else if (streq(p[0], "pkcs12") && p[1] && ((streq(p[1], INLINE_FILE_TAG) && p[2]) || !p[2]) && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->pkcs12_file = p[1];
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->pkcs12_file_inline = p[2];
}
}
#endif /* ENABLE_CRYPTO_MBEDTLS */
else if (streq(p[0], "askpass") && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (p[1])
{
options->key_pass_file = p[1];
}
else
{
options->key_pass_file = "stdin";
}
}
else if (streq(p[0], "auth-nocache") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
ssl_set_auth_nocache();
}
else if (streq(p[0], "auth-token") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_ECHO);
ssl_set_auth_token(p[1]);
#ifdef ENABLE_MANAGEMENT
if (management)
{
management_auth_token(management, p[1]);
}
#endif
}
else if (streq(p[0], "single-session") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->single_session = true;
}
else if (streq(p[0], "push-peer-info") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->push_peer_info = true;
}
else if (streq(p[0], "tls-exit") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->tls_exit = true;
}
else if (streq(p[0], "tls-cipher") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->cipher_list = p[1];
}
else if (streq(p[0], "tls-cert-profile") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->tls_cert_profile = p[1];
}
else if (streq(p[0], "crl-verify") && p[1] && ((p[2] && streq(p[2], "dir"))
|| (p[2] && streq(p[1], INLINE_FILE_TAG) ) || !p[2]) && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (p[2] && streq(p[2], "dir"))
{
options->ssl_flags |= SSLF_CRL_VERIFY_DIR;
}
options->crl_file = p[1];
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->crl_file_inline = p[2];
}
}
else if (streq(p[0], "tls-verify") && p[1])
{
VERIFY_PERMISSION(OPT_P_SCRIPT);
if (!no_more_than_n_args(msglevel, p, 2, NM_QUOTE_HINT))
{
goto err;
}
set_user_script(options, &options->tls_verify,
string_substitute(p[1], ',', ' ', &options->gc),
"tls-verify", true);
}
#ifndef ENABLE_CRYPTO_MBEDTLS
else if (streq(p[0], "tls-export-cert") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->tls_export_cert = p[1];
}
#endif
#if P2MP_SERVER
else if (streq(p[0], "compat-names") && ((p[1] && streq(p[1], "no-remapping")) || !p[1]) && !p[2])
#else
else if (streq(p[0], "compat-names") && !p[1])
#endif
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (options->verify_x509_type != VERIFY_X509_NONE)
{
msg(msglevel, "you cannot use --compat-names with --verify-x509-name");
goto err;
}
msg(M_WARN, "DEPRECATED OPTION: --compat-names, please update your configuration. This will be removed in OpenVPN 2.5.");
compat_flag(COMPAT_FLAG_SET | COMPAT_NAMES);
#if P2MP_SERVER
if (p[1] && streq(p[1], "no-remapping"))
{
compat_flag(COMPAT_FLAG_SET | COMPAT_NO_NAME_REMAPPING);
}
}
else if (streq(p[0], "no-name-remapping") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (options->verify_x509_type != VERIFY_X509_NONE)
{
msg(msglevel, "you cannot use --no-name-remapping with --verify-x509-name");
goto err;
}
msg(M_WARN, "DEPRECATED OPTION: --no-name-remapping, please update your configuration. This will be removed in OpenVPN 2.5.");
compat_flag(COMPAT_FLAG_SET | COMPAT_NAMES);
compat_flag(COMPAT_FLAG_SET | COMPAT_NO_NAME_REMAPPING);
#endif
}
else if (streq(p[0], "verify-x509-name") && p[1] && strlen(p[1]) && !p[3])
{
int type = VERIFY_X509_SUBJECT_DN;
VERIFY_PERMISSION(OPT_P_GENERAL);
if (compat_flag(COMPAT_FLAG_QUERY | COMPAT_NAMES))
{
msg(msglevel, "you cannot use --verify-x509-name with "
"--compat-names or --no-name-remapping");
goto err;
}
if (p[2])
{
if (streq(p[2], "subject"))
{
type = VERIFY_X509_SUBJECT_DN;
}
else if (streq(p[2], "name"))
{
type = VERIFY_X509_SUBJECT_RDN;
}
else if (streq(p[2], "name-prefix"))
{
type = VERIFY_X509_SUBJECT_RDN_PREFIX;
}
else
{
msg(msglevel, "unknown X.509 name type: %s", p[2]);
goto err;
}
}
options->verify_x509_type = type;
options->verify_x509_name = p[1];
}
else if (streq(p[0], "ns-cert-type") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], "server"))
{
options->ns_cert_type = NS_CERT_CHECK_SERVER;
}
else if (streq(p[1], "client"))
{
options->ns_cert_type = NS_CERT_CHECK_CLIENT;
}
else
{
msg(msglevel, "--ns-cert-type must be 'client' or 'server'");
goto err;
}
}
else if (streq(p[0], "remote-cert-ku"))
{
VERIFY_PERMISSION(OPT_P_GENERAL);
size_t j;
for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j)
{
sscanf(p[j], "%x", &(options->remote_cert_ku[j-1]));
}
if (j == 1)
{
/* No specific KU required, but require KU to be present */
options->remote_cert_ku[0] = OPENVPN_KU_REQUIRED;
}
}
else if (streq(p[0], "remote-cert-eku") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->remote_cert_eku = p[1];
}
else if (streq(p[0], "remote-cert-tls") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], "server"))
{
options->remote_cert_ku[0] = OPENVPN_KU_REQUIRED;
options->remote_cert_eku = "TLS Web Server Authentication";
}
else if (streq(p[1], "client"))
{
options->remote_cert_ku[0] = OPENVPN_KU_REQUIRED;
options->remote_cert_eku = "TLS Web Client Authentication";
}
else
{
msg(msglevel, "--remote-cert-tls must be 'client' or 'server'");
goto err;
}
}
else if (streq(p[0], "tls-timeout") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_TLS_PARMS);
options->tls_timeout = positive_atoi(p[1]);
}
else if (streq(p[0], "reneg-bytes") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_TLS_PARMS);
options->renegotiate_bytes = positive_atoi(p[1]);
}
else if (streq(p[0], "reneg-pkts") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_TLS_PARMS);
options->renegotiate_packets = positive_atoi(p[1]);
}
else if (streq(p[0], "reneg-sec") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_TLS_PARMS);
options->renegotiate_seconds = positive_atoi(p[1]);
if (p[2])
{
options->renegotiate_seconds_min = positive_atoi(p[2]);
}
}
else if (streq(p[0], "hand-window") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_TLS_PARMS);
options->handshake_window = positive_atoi(p[1]);
}
else if (streq(p[0], "tran-window") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_TLS_PARMS);
options->transition_window = positive_atoi(p[1]);
}
else if (streq(p[0], "tls-auth") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->tls_auth_file_inline = p[2];
}
else if (p[2])
{
int key_direction;
key_direction = ascii2keydirection(msglevel, p[2]);
if (key_direction >= 0)
{
options->key_direction = key_direction;
}
else
{
goto err;
}
}
options->tls_auth_file = p[1];
}
else if (streq(p[0], "tls-crypt") && p[1] && !p[3])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
if (streq(p[1], INLINE_FILE_TAG) && p[2])
{
options->tls_crypt_inline = p[2];
}
options->tls_crypt_file = p[1];
}
else if (streq(p[0], "key-method") && p[1] && !p[2])
{
int key_method;
VERIFY_PERMISSION(OPT_P_GENERAL);
key_method = atoi(p[1]);
if (key_method < KEY_METHOD_MIN || key_method > KEY_METHOD_MAX)
{
msg(msglevel, "key_method parameter (%d) must be >= %d and <= %d",
key_method,
KEY_METHOD_MIN,
KEY_METHOD_MAX);
goto err;
}
options->key_method = key_method;
}
else if (streq(p[0], "x509-track") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
x509_track_add(&options->x509_track, p[1], msglevel, &options->gc);
}
#ifdef ENABLE_X509ALTUSERNAME
else if (streq(p[0], "x509-username-field") && p[1] && !p[2])
{
/* This option used to automatically upcase the fieldname passed as the
* option argument, e.g., "ou" became "OU". Now, this "helpfulness" is
* fine-tuned by only upcasing Subject field attribute names which consist
* of all lower-case characters. Mixed-case attributes such as
* "emailAddress" are left as-is. An option parameter having the "ext:"
* prefix for matching X.509v3 extended fields will also remain unchanged.
*/
char *s = p[1];
VERIFY_PERMISSION(OPT_P_GENERAL);
if (strncmp("ext:", s, 4) != 0)
{
size_t i = 0;
while (s[i] && !isupper(s[i]))
{
i++;
}
if (strlen(s) == i)
{
while ((*s = toupper(*s)) != '\0')
{
s++;
}
msg(M_WARN, "DEPRECATED FEATURE: automatically upcased the "
"--x509-username-field parameter to '%s'; please update your"
"configuration", p[1]);
}
}
else if (!x509_username_field_ext_supported(s+4))
{
msg(msglevel, "Unsupported x509-username-field extension: %s", s);
}
options->x509_username_field = p[1];
}
#endif /* ENABLE_X509ALTUSERNAME */
#ifdef ENABLE_PKCS11
else if (streq(p[0], "show-pkcs11-ids") && !p[3])
{
char *provider = p[1];
bool cert_private = (p[2] == NULL ? false : ( atoi(p[2]) != 0 ));
#ifdef DEFAULT_PKCS11_MODULE
if (!provider)
{
provider = DEFAULT_PKCS11_MODULE;
}
else if (!p[2])
{
char *endp = NULL;
int i = strtol(provider, &endp, 10);
if (*endp == 0)
{
/* There was one argument, and it was purely numeric.
* Interpret it as the cert_private argument */
provider = DEFAULT_PKCS11_MODULE;
cert_private = i;
}
}
#else /* ifdef DEFAULT_PKCS11_MODULE */
if (!provider)
{
msg(msglevel, "--show-pkcs11-ids requires a provider parameter");
goto err;
}
#endif /* ifdef DEFAULT_PKCS11_MODULE */
VERIFY_PERMISSION(OPT_P_GENERAL);
set_debug_level(options->verbosity, SDL_CONSTRAIN);
show_pkcs11_ids(provider, cert_private);
openvpn_exit(OPENVPN_EXIT_STATUS_GOOD); /* exit point */
}
else if (streq(p[0], "pkcs11-providers") && p[1])
{
int j;
VERIFY_PERMISSION(OPT_P_GENERAL);
for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j)
{
options->pkcs11_providers[j-1] = p[j];
}
}
else if (streq(p[0], "pkcs11-protected-authentication"))
{
int j;
VERIFY_PERMISSION(OPT_P_GENERAL);
for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j)
{
options->pkcs11_protected_authentication[j-1] = atoi(p[j]) != 0 ? 1 : 0;
}
}
else if (streq(p[0], "pkcs11-private-mode") && p[1])
{
int j;
VERIFY_PERMISSION(OPT_P_GENERAL);
for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j)
{
sscanf(p[j], "%x", &(options->pkcs11_private_mode[j-1]));
}
}
else if (streq(p[0], "pkcs11-cert-private"))
{
int j;
VERIFY_PERMISSION(OPT_P_GENERAL);
for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j)
{
options->pkcs11_cert_private[j-1] = atoi(p[j]) != 0 ? 1 : 0;
}
}
else if (streq(p[0], "pkcs11-pin-cache") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->pkcs11_pin_cache_period = atoi(p[1]);
}
else if (streq(p[0], "pkcs11-id") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->pkcs11_id = p[1];
}
else if (streq(p[0], "pkcs11-id-management") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->pkcs11_id_management = true;
}
#endif /* ifdef ENABLE_PKCS11 */
else if (streq(p[0], "rmtun") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->persist_config = true;
options->persist_mode = 0;
}
else if (streq(p[0], "mktun") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->persist_config = true;
options->persist_mode = 1;
}
else if (streq(p[0], "peer-id") && p[1] && !p[2])
{
VERIFY_PERMISSION(OPT_P_PEER_ID);
options->use_peer_id = true;
options->peer_id = atoi(p[1]);
}
#if defined(ENABLE_CRYPTO_OPENSSL) && OPENSSL_VERSION_NUMBER >= 0x10001000
else if (streq(p[0], "keying-material-exporter") && p[1] && p[2])
{
int ekm_length = positive_atoi(p[2]);
VERIFY_PERMISSION(OPT_P_GENERAL);
if (strncmp(p[1], "EXPORTER", 8))
{
msg(msglevel, "Keying material exporter label must begin with "
"\"EXPORTER\"");
goto err;
}
if (ekm_length < 16 || ekm_length > 4095)
{
msg(msglevel, "Invalid keying material exporter length");
goto err;
}
options->keying_material_exporter_label = p[1];
options->keying_material_exporter_length = ekm_length;
}
#endif /* if defined(ENABLE_CRYPTO_OPENSSL) && OPENSSL_VERSION_NUMBER >= 0x10001000 */
else if (streq(p[0], "allow-recursive-routing") && !p[1])
{
VERIFY_PERMISSION(OPT_P_GENERAL);
options->allow_recursive_routing = true;
}
else
{
int i;
int msglevel = msglevel_fc;
/* Check if an option is in --ignore-unknown-option and
* set warning level to non fatal */
for (i = 0; options->ignore_unknown_option && options->ignore_unknown_option[i]; i++)
{
if (streq(p[0], options->ignore_unknown_option[i]))
{
msglevel = M_WARN;
break;
}
}
if (file)
{
msg(msglevel, "Unrecognized option or missing or extra parameter(s) in %s:%d: %s (%s)", file, line, p[0], PACKAGE_VERSION);
}
else
{
msg(msglevel, "Unrecognized option or missing or extra parameter(s): --%s (%s)", p[0], PACKAGE_VERSION);
}
}
err:
gc_free(&gc);
}