de6d9b64 |
/*
* UDP prototype streaming system |
406792e7 |
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
de6d9b64 |
* |
b78e7197 |
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
19720f15 |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
b78e7197 |
* version 2.1 of the License, or (at your option) any later version. |
de6d9b64 |
* |
b78e7197 |
* FFmpeg is distributed in the hope that it will be useful, |
de6d9b64 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
19720f15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details. |
de6d9b64 |
* |
19720f15 |
* You should have received a copy of the GNU Lesser General Public |
b78e7197 |
* License along with FFmpeg; if not, write to the Free Software |
5509bffa |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
de6d9b64 |
*/ |
3adfb377 |
/** |
ba87f080 |
* @file |
3adfb377 |
* UDP protocol
*/
|
a9e02947 |
#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */ |
046f081b |
|
8be1c656 |
#include "avformat.h" |
4ec153bb |
#include "avio_internal.h" |
ab0287fc |
#include "libavutil/parseutils.h" |
03f8f397 |
#include "libavutil/fifo.h" |
20f0bf8c |
#include "libavutil/intreadwrite.h" |
65ac5137 |
#include "libavutil/avstring.h" |
de6d9b64 |
#include <unistd.h> |
e4a9e3cc |
#include "internal.h" |
42572ef5 |
#include "network.h" |
087b3272 |
#include "os_support.h" |
5cec8971 |
#include "url.h" |
124a9edb |
|
281bde27 |
#if HAVE_PTHREAD_CANCEL |
42756021 |
#include <pthread.h> |
124a9edb |
#endif
|
c0a8f8d4 |
#include <sys/time.h> |
de6d9b64 |
|
9c633e9a |
#ifndef IPV6_ADD_MEMBERSHIP
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
#endif
|
20f0bf8c |
#define UDP_TX_BUF_SIZE 32768
#define UDP_MAX_PKT_SIZE 65536
|
de6d9b64 |
typedef struct { |
2d225591 |
int udp_fd;
int ttl; |
236bb1ab |
int buffer_size; |
2d225591 |
int is_multicast;
int local_port; |
34ecc397 |
int reuse_socket; |
3069e70f |
int overrun_nonfatal; |
7a91333f |
struct sockaddr_storage dest_addr; |
397db8ac |
int dest_addr_len; |
6766a354 |
int is_connected; |
42756021 |
/* Circular Buffer variables for use in UDP receive code */
int circular_buffer_size; |
03f8f397 |
AVFifoBuffer *fifo; |
42756021 |
int circular_buffer_error; |
281bde27 |
#if HAVE_PTHREAD_CANCEL |
42756021 |
pthread_t circular_buffer_thread; |
bc900501 |
pthread_mutex_t mutex;
pthread_cond_t cond; |
45c39e56 |
int thread_started; |
124a9edb |
#endif |
20f0bf8c |
uint8_t tmp[UDP_MAX_PKT_SIZE+4];
int remaining_in_dg; |
de6d9b64 |
} UDPContext;
|
64810754 |
static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
struct sockaddr *addr)
{ |
a8bde059 |
#ifdef IP_MULTICAST_TTL |
7a91333f |
if (addr->sa_family == AF_INET) {
if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) { |
086119b3 |
av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL): %s\n", strerror(errno)); |
7a91333f |
return -1;
}
} |
a8bde059 |
#endif |
b4d68544 |
#if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS) |
7a91333f |
if (addr->sa_family == AF_INET6) {
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) { |
086119b3 |
av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS): %s\n", strerror(errno)); |
7a91333f |
return -1;
}
} |
a8bde059 |
#endif |
7a91333f |
return 0;
}
|
88c76c7d |
static int udp_join_multicast_group(int sockfd, struct sockaddr *addr) |
64810754 |
{ |
a8bde059 |
#ifdef IP_ADD_MEMBERSHIP |
7a91333f |
if (addr->sa_family == AF_INET) { |
a8bde059 |
struct ip_mreq mreq;
|
7a91333f |
mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
mreq.imr_interface.s_addr= INADDR_ANY;
if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { |
086119b3 |
av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP): %s\n", strerror(errno)); |
7a91333f |
return -1;
}
} |
a8bde059 |
#endif |
63206a8f |
#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6) |
7a91333f |
if (addr->sa_family == AF_INET6) { |
a8bde059 |
struct ipv6_mreq mreq6;
|
7a91333f |
memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
mreq6.ipv6mr_interface= 0;
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) { |
086119b3 |
av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP): %s\n", strerror(errno)); |
7a91333f |
return -1;
}
} |
a8bde059 |
#endif |
7a91333f |
return 0;
}
|
64810754 |
static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr)
{ |
a8bde059 |
#ifdef IP_DROP_MEMBERSHIP |
7a91333f |
if (addr->sa_family == AF_INET) { |
a8bde059 |
struct ip_mreq mreq;
|
7a91333f |
mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
mreq.imr_interface.s_addr= INADDR_ANY;
if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { |
086119b3 |
av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP): %s\n", strerror(errno)); |
7a91333f |
return -1;
}
} |
a8bde059 |
#endif |
63206a8f |
#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6) |
7a91333f |
if (addr->sa_family == AF_INET6) { |
a8bde059 |
struct ipv6_mreq mreq6;
|
7a91333f |
memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
mreq6.ipv6mr_interface= 0;
if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) { |
086119b3 |
av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP): %s\n", strerror(errno)); |
7a91333f |
return -1;
}
} |
a8bde059 |
#endif |
7a91333f |
return 0;
}
|
64810754 |
static struct addrinfo* udp_resolve_host(const char *hostname, int port,
int type, int family, int flags)
{ |
a92be9b8 |
struct addrinfo hints = { 0 }, *res = 0; |
7a91333f |
int error;
char sport[16]; |
d607861c |
const char *node = 0, *service = "0"; |
7a91333f |
if (port > 0) { |
2fc8ea24 |
snprintf(sport, sizeof(sport), "%d", port); |
7a91333f |
service = sport;
}
if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
node = hostname;
} |
7d8576c2 |
hints.ai_socktype = type;
hints.ai_family = family;
hints.ai_flags = flags;
if ((error = getaddrinfo(node, service, &hints, &res))) { |
11a74f36 |
res = NULL; |
7c823d8b |
av_log(NULL, AV_LOG_ERROR, "udp_resolve_host: %s\n", gai_strerror(error)); |
7d8576c2 |
}
|
7a91333f |
return res;
}
|
64810754 |
static int udp_set_url(struct sockaddr_storage *addr,
const char *hostname, int port)
{ |
7a91333f |
struct addrinfo *res0; |
d05cb726 |
int addr_len;
|
7c823d8b |
res0 = udp_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0); |
6f3e0b21 |
if (res0 == 0) return AVERROR(EIO); |
d05cb726 |
memcpy(addr, res0->ai_addr, res0->ai_addrlen);
addr_len = res0->ai_addrlen; |
7a91333f |
freeaddrinfo(res0); |
d05cb726 |
return addr_len; |
7a91333f |
}
|
65ac5137 |
static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr,
int *addr_len, const char *localaddr) |
aa519c47 |
{ |
7a91333f |
int udp_fd = -1; |
276358c1 |
struct addrinfo *res0 = NULL, *res = NULL; |
51844e6c |
int family = AF_UNSPEC; |
115329f1 |
|
51844e6c |
if (((struct sockaddr *) &s->dest_addr)->sa_family)
family = ((struct sockaddr *) &s->dest_addr)->sa_family; |
65ac5137 |
res0 = udp_resolve_host(localaddr[0] ? localaddr : NULL, s->local_port,
SOCK_DGRAM, family, AI_PASSIVE); |
7d8576c2 |
if (res0 == 0)
goto fail;
for (res = res0; res; res=res->ai_next) {
udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
if (udp_fd > 0) break; |
086119b3 |
av_log(NULL, AV_LOG_ERROR, "socket: %s\n", strerror(errno)); |
7d8576c2 |
} |
276358c1 |
if (udp_fd < 0) |
7a91333f |
goto fail; |
115329f1 |
|
aa519c47 |
memcpy(addr, res->ai_addr, res->ai_addrlen);
*addr_len = res->ai_addrlen; |
7a91333f |
|
aa519c47 |
freeaddrinfo(res0); |
115329f1 |
|
7a91333f |
return udp_fd; |
115329f1 |
|
7a91333f |
fail:
if (udp_fd >= 0)
closesocket(udp_fd); |
88730be6 |
if(res0)
freeaddrinfo(res0); |
7a91333f |
return -1;
}
|
aa519c47 |
static int udp_port(struct sockaddr_storage *addr, int addr_len)
{ |
03c09e43 |
char sbuf[sizeof(int)*3+1]; |
aa519c47 |
|
03c09e43 |
if (getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV) != 0) { |
086119b3 |
av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", strerror(errno)); |
aa519c47 |
return -1;
}
return strtol(sbuf, NULL, 10);
}
|
7a91333f |
|
2d225591 |
/**
* If no filename is given to av_open_input_file because you want to
* get the local port first, then you must call this function to set
* the remote server address.
*
* url syntax: udp://host:port[?option=val...] |
35b74c3d |
* option: 'ttl=n' : set the ttl value (for multicast only) |
2d225591 |
* 'localport=n' : set the local port |
9899efb4 |
* 'pkt_size=n' : set max packet size |
34ecc397 |
* 'reuse=1' : enable reusing the socket |
3069e70f |
* 'overrun_nonfatal=1': survive in case of circular buffer overrun |
2d225591 |
* |
9a58234f |
* @param h media file context |
2d225591 |
* @param uri of the remote server
* @return zero if no error.
*/ |
4ec153bb |
int ff_udp_set_remote_url(URLContext *h, const char *uri) |
2d225591 |
{
UDPContext *s = h->priv_data; |
21a569f3 |
char hostname[256], buf[10]; |
2d225591 |
int port; |
21a569f3 |
const char *p; |
115329f1 |
|
f3bfe388 |
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); |
de6d9b64 |
|
2d225591 |
/* set the destination address */ |
d05cb726 |
s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port);
if (s->dest_addr_len < 0) { |
6f3e0b21 |
return AVERROR(EIO); |
d05cb726 |
} |
55b6bd1c |
s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr); |
21a569f3 |
p = strchr(uri, '?');
if (p) { |
ab0287fc |
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { |
21a569f3 |
int was_connected = s->is_connected;
s->is_connected = strtol(buf, NULL, 10);
if (s->is_connected && !was_connected) {
if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
s->dest_addr_len)) {
s->is_connected = 0; |
c60112f2 |
av_log(h, AV_LOG_ERROR, "connect: %s\n", strerror(errno)); |
21a569f3 |
return AVERROR(EIO);
}
}
}
} |
d05cb726 |
|
2d225591 |
return 0;
}
/** |
48e77473 |
* Return the local port used by the UDP connection |
9a58234f |
* @param h media file context |
2d225591 |
* @return the local port number
*/ |
4ec153bb |
int ff_udp_get_local_port(URLContext *h) |
2d225591 |
{
UDPContext *s = h->priv_data;
return s->local_port;
}
/**
* Return the udp file handle for select() usage to wait for several RTP
* streams at the same time.
* @param h media file context
*/ |
c4efa7c2 |
static int udp_get_file_handle(URLContext *h) |
2d225591 |
{
UDPContext *s = h->priv_data;
return s->udp_fd;
}
|
281bde27 |
#if HAVE_PTHREAD_CANCEL |
42756021 |
static void *circular_buffer_task( void *_URLContext)
{
URLContext *h = _URLContext;
UDPContext *s = h->priv_data; |
aa129788 |
int old_cancelstate; |
42756021 |
|
aa129788 |
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); |
63afc4f6 |
ff_socket_nonblock(s->udp_fd, 0); |
afbf9ed0 |
pthread_mutex_lock(&s->mutex); |
aa129788 |
while(1) { |
42756021 |
int len;
|
afbf9ed0 |
pthread_mutex_unlock(&s->mutex); |
aa129788 |
/* Blocking operations are always cancellation points;
see "General Information" / "Thread Cancelation Overview"
in Single Unix. */
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate); |
20f0bf8c |
len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0); |
aa129788 |
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); |
afbf9ed0 |
pthread_mutex_lock(&s->mutex); |
42756021 |
if (len < 0) {
if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) { |
e1838835 |
s->circular_buffer_error = ff_neterrno(); |
bc900501 |
goto end; |
42756021 |
} |
7c4e4c6a |
continue; |
42756021 |
} |
20f0bf8c |
AV_WL32(s->tmp, len); |
5deb5ccb |
if(av_fifo_space(s->fifo) < len + 4) { |
3069e70f |
/* No Space left */
if (s->overrun_nonfatal) {
av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
"Surviving due to overrun_nonfatal option\n");
continue;
} else {
av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
"To avoid, increase fifo_size URL option. "
"To survive in such case, use overrun_nonfatal option\n");
s->circular_buffer_error = AVERROR(EIO);
goto end;
}
} |
20f0bf8c |
av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL); |
bc900501 |
pthread_cond_signal(&s->cond); |
42756021 |
}
|
bc900501 |
end:
pthread_cond_signal(&s->cond);
pthread_mutex_unlock(&s->mutex); |
42756021 |
return NULL;
} |
bc900501 |
#endif |
42756021 |
|
2d225591 |
/* put it in UDP context */ |
de6d9b64 |
/* return non zero if error */
static int udp_open(URLContext *h, const char *uri, int flags)
{ |
65ac5137 |
char hostname[1024], localaddr[1024] = ""; |
36b53281 |
int port, udp_fd = -1, tmp, bind_ret = -1; |
7e580505 |
UDPContext *s = h->priv_data; |
88730be6 |
int is_output; |
2d225591 |
const char *p;
char buf[256]; |
aa519c47 |
struct sockaddr_storage my_addr;
int len; |
00952be4 |
int reuse_specified = 0; |
de6d9b64 |
h->is_streamed = 1; |
9899efb4 |
h->max_packet_size = 1472; |
de6d9b64 |
|
a7ea5e3d |
is_output = !(flags & AVIO_FLAG_READ); |
115329f1 |
|
2d225591 |
s->ttl = 16; |
236bb1ab |
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
|
42756021 |
s->circular_buffer_size = 7*188*4096;
|
2d225591 |
p = strchr(uri, '?');
if (p) { |
ab0287fc |
if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) { |
5d62d0b1 |
char *endptr = NULL; |
00952be4 |
s->reuse_socket = strtol(buf, &endptr, 10);
/* assume if no digits were found it is a request to enable it */
if (buf == endptr)
s->reuse_socket = 1;
reuse_specified = 1;
} |
3069e70f |
if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
char *endptr = NULL;
s->overrun_nonfatal = strtol(buf, &endptr, 10);
/* assume if no digits were found it is a request to enable it */
if (buf == endptr)
s->overrun_nonfatal = 1;
} |
ab0287fc |
if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) { |
2d225591 |
s->ttl = strtol(buf, NULL, 10);
} |
ab0287fc |
if (av_find_info_tag(buf, sizeof(buf), "localport", p)) { |
2d225591 |
s->local_port = strtol(buf, NULL, 10);
} |
ab0287fc |
if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) { |
9899efb4 |
h->max_packet_size = strtol(buf, NULL, 10);
} |
ab0287fc |
if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) { |
236bb1ab |
s->buffer_size = strtol(buf, NULL, 10);
} |
ab0287fc |
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { |
6766a354 |
s->is_connected = strtol(buf, NULL, 10);
} |
bd652ff6 |
if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) { |
42756021 |
s->circular_buffer_size = strtol(buf, NULL, 10)*188;
} |
65ac5137 |
if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
av_strlcpy(localaddr, buf, sizeof(localaddr));
} |
de6d9b64 |
} |
2d225591 |
/* fill the dest addr */ |
f3bfe388 |
av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); |
115329f1 |
|
f3bfe388 |
/* XXX: fix av_url_split */ |
2d225591 |
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */ |
a7ea5e3d |
if (!(flags & AVIO_FLAG_READ)) |
2d225591 |
goto fail;
} else { |
4ec153bb |
if (ff_udp_set_remote_url(h, uri) < 0) |
82505611 |
goto fail; |
2d225591 |
} |
de6d9b64 |
|
fc66e231 |
if ((s->is_multicast || !s->local_port) && (h->flags & AVIO_FLAG_READ)) |
882d00f2 |
s->local_port = port; |
65ac5137 |
udp_fd = udp_socket_create(s, &my_addr, &len, localaddr); |
2d225591 |
if (udp_fd < 0)
goto fail;
|
00952be4 |
/* Follow the requested reuse option, unless it's multicast in which |
da9cea77 |
* case enable reuse unless explicitly disabled. |
00952be4 |
*/
if (s->reuse_socket || (s->is_multicast && !reuse_specified)) {
s->reuse_socket = 1; |
34ecc397 |
if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
goto fail; |
00952be4 |
} |
34ecc397 |
|
1b89bcdd |
/* If multicast, try binding the multicast address first, to avoid
* receiving UDP packets from other sources aimed at the same UDP |
c700fdb0 |
* port. This fails on windows. This makes sending to the same address
* using sendto() fail, so only do it if we're opened in read-only mode. */
if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) { |
36b53281 |
bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
}
/* bind to the local address if not multicast or if the multicast
* bind failed */ |
113d3e10 |
/* the bind is needed to give a port to the socket now */ |
a887c87c |
if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
av_log(h, AV_LOG_ERROR, "bind failed: %s\n", strerror(errno)); |
de6d9b64 |
goto fail; |
a887c87c |
} |
de6d9b64 |
|
d4936869 |
len = sizeof(my_addr);
getsockname(udp_fd, (struct sockaddr *)&my_addr, &len); |
aa519c47 |
s->local_port = udp_port(&my_addr, len);
|
7a91333f |
if (s->is_multicast) { |
2bfd92b3 |
if (h->flags & AVIO_FLAG_WRITE) { |
a8bde059 |
/* output */ |
9cdcb04f |
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0) |
7a91333f |
goto fail; |
2bfd92b3 |
}
if (h->flags & AVIO_FLAG_READ) { |
a8bde059 |
/* input */ |
88c76c7d |
if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0) |
7a91333f |
goto fail;
}
} |
de6d9b64 |
|
2d225591 |
if (is_output) {
/* limit the tx buf size to limit latency */ |
236bb1ab |
tmp = s->buffer_size; |
2d225591 |
if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) { |
c60112f2 |
av_log(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno)); |
2d225591 |
goto fail;
} |
f18cae4d |
} else {
/* set udp recv buffer size to the largest possible udp packet size to
* avoid losing data on OSes that set this too low by default. */ |
236bb1ab |
tmp = s->buffer_size;
if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) { |
c60112f2 |
av_log(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno)); |
236bb1ab |
} |
ce09d560 |
/* make the socket non-blocking */
ff_socket_nonblock(udp_fd, 1); |
2d225591 |
} |
6766a354 |
if (s->is_connected) {
if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) { |
c60112f2 |
av_log(h, AV_LOG_ERROR, "connect: %s\n", strerror(errno)); |
6766a354 |
goto fail;
}
} |
2d225591 |
s->udp_fd = udp_fd; |
42756021 |
|
281bde27 |
#if HAVE_PTHREAD_CANCEL |
42756021 |
if (!is_output && s->circular_buffer_size) { |
45c39e56 |
int ret;
|
42756021 |
/* start the task going */ |
03f8f397 |
s->fifo = av_fifo_alloc(s->circular_buffer_size); |
45c39e56 |
ret = pthread_mutex_init(&s->mutex, NULL);
if (ret != 0) {
av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret)); |
42756021 |
goto fail;
} |
45c39e56 |
ret = pthread_cond_init(&s->cond, NULL);
if (ret != 0) {
av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
goto cond_fail;
}
ret = pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h);
if (ret != 0) {
av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
goto thread_fail;
}
s->thread_started = 1; |
42756021 |
} |
124a9edb |
#endif |
42756021 |
|
de6d9b64 |
return 0; |
281bde27 |
#if HAVE_PTHREAD_CANCEL |
45c39e56 |
thread_fail:
pthread_cond_destroy(&s->cond);
cond_fail:
pthread_mutex_destroy(&s->mutex);
#endif |
de6d9b64 |
fail: |
2d225591 |
if (udp_fd >= 0) |
9ddd71fc |
closesocket(udp_fd); |
f35761bc |
av_fifo_free(s->fifo); |
6f3e0b21 |
return AVERROR(EIO); |
de6d9b64 |
}
|
0c1a9eda |
static int udp_read(URLContext *h, uint8_t *buf, int size) |
de6d9b64 |
{
UDPContext *s = h->priv_data; |
7d084299 |
int ret; |
463705bd |
int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK; |
42756021 |
|
281bde27 |
#if HAVE_PTHREAD_CANCEL |
e60e54ce |
if (s->fifo) { |
bc900501 |
pthread_mutex_lock(&s->mutex); |
42756021 |
do { |
03f8f397 |
avail = av_fifo_size(s->fifo); |
42756021 |
if (avail) { // >=size) { |
20f0bf8c |
uint8_t tmp[4];
av_fifo_generic_read(s->fifo, tmp, 4, NULL);
avail= AV_RL32(tmp);
if(avail > size){
av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
avail= size;
} |
42756021 |
|
20f0bf8c |
av_fifo_generic_read(s->fifo, buf, avail, NULL); |
b2bdca1b |
av_fifo_drain(s->fifo, AV_RL32(tmp) - avail); |
afbf9ed0 |
pthread_mutex_unlock(&s->mutex); |
20f0bf8c |
return avail; |
3dcbafc7 |
} else if(s->circular_buffer_error){ |
afbf9ed0 |
int err = s->circular_buffer_error; |
bc900501 |
pthread_mutex_unlock(&s->mutex); |
afbf9ed0 |
return err; |
463705bd |
} else if(nonblock) { |
9f50dafe |
pthread_mutex_unlock(&s->mutex);
return AVERROR(EAGAIN); |
42756021 |
}
else { |
463705bd |
/* FIXME: using the monotonic clock would be better,
but it does not exist on all supported platforms. */
int64_t t = av_gettime() + 100000;
struct timespec tv = { .tv_sec = t / 1000000,
.tv_nsec = (t % 1000000) * 1000 };
if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0)
return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno);
nonblock = 1; |
42756021 |
}
} while( 1);
} |
bc900501 |
#endif |
2d225591 |
|
f87b1b37 |
if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
ebba2b3e |
ret = ff_network_wait_fd(s->udp_fd, 0);
if (ret < 0)
return ret; |
2d225591 |
} |
ebba2b3e |
ret = recv(s->udp_fd, buf, size, 0); |
42756021 |
|
ebba2b3e |
return ret < 0 ? ff_neterrno() : ret; |
de6d9b64 |
}
|
27241cbf |
static int udp_write(URLContext *h, const uint8_t *buf, int size) |
de6d9b64 |
{
UDPContext *s = h->priv_data; |
2d225591 |
int ret;
|
f87b1b37 |
if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
ebba2b3e |
ret = ff_network_wait_fd(s->udp_fd, 1);
if (ret < 0)
return ret; |
de6d9b64 |
} |
ebba2b3e |
if (!s->is_connected) {
ret = sendto (s->udp_fd, buf, size, 0,
(struct sockaddr *) &s->dest_addr,
s->dest_addr_len);
} else
ret = send(s->udp_fd, buf, size, 0);
return ret < 0 ? ff_neterrno() : ret; |
2d225591 |
}
static int udp_close(URLContext *h)
{
UDPContext *s = h->priv_data; |
45c39e56 |
int ret; |
2d225591 |
|
a7ea5e3d |
if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) |
9cdcb04f |
udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr); |
9ddd71fc |
closesocket(s->udp_fd); |
03f8f397 |
av_fifo_free(s->fifo); |
281bde27 |
#if HAVE_PTHREAD_CANCEL |
45c39e56 |
if (s->thread_started) { |
aa129788 |
pthread_cancel(s->circular_buffer_thread); |
45c39e56 |
ret = pthread_join(s->circular_buffer_thread, NULL);
if (ret != 0)
av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
}
|
bc900501 |
pthread_mutex_destroy(&s->mutex);
pthread_cond_destroy(&s->cond);
#endif |
2d225591 |
return 0; |
de6d9b64 |
}
|
c6610a21 |
URLProtocol ff_udp_protocol = { |
f35ff97f |
.name = "udp",
.url_open = udp_open,
.url_read = udp_read,
.url_write = udp_write,
.url_close = udp_close, |
f0a80394 |
.url_get_file_handle = udp_get_file_handle, |
7e580505 |
.priv_data_size = sizeof(UDPContext), |
32b83aee |
.flags = URL_PROTOCOL_FLAG_NETWORK, |
de6d9b64 |
}; |