/*

  *  Copyright (C) 2002 - 2004 Tomasz Kojm <tkojm@clamav.net>

  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 

 #if HAVE_CONFIG_H
 #include "clamav-config.h"
 #endif
 

 #include <stdio.h>
 #include <sys/types.h>

 #include <sys/stat.h>
 #include <unistd.h>

 #include <sys/socket.h>
 #include <sys/un.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>

 #include <netdb.h>

 #include <string.h>

 
 #include "others.h"
 #include "defaults.h"
 #include "shared.h"

 #include "options.h"
 #include "cfgparser.h"
 #include "memory.h"
 #include "output.h"

 #include "str.h"

 #ifdef PF_INET
 # define SOCKET_INET	PF_INET
 #else
 # define SOCKET_INET	AF_INET
 #endif
 

 
 int dsfile(int sockd, const char *filename)
 {
 	int infected = 0, waserror = 0;
 	char buff[4096], *scancmd;
 	FILE *fd;
 
 
     scancmd = mcalloc(strlen(filename) + 20, sizeof(char));
     sprintf(scancmd, "CONTSCAN %s", filename);
 
     if(write(sockd, scancmd, strlen(scancmd)) <= 0) {
 	mprintf("@Can't write to the socket.\n");
 	free(scancmd);
 	return -1;
     }
 
     free(scancmd);
 
     if((fd = fdopen(dup(sockd), "r")) == NULL) {
 	mprintf("@Can't open descriptor for reading.\n");
 	return -1;
     }
 
     while(fgets(buff, sizeof(buff), fd)) {
 	if(strstr(buff, "FOUND\n")) {
 	    infected++;
 	    logg("%s", buff);
 	    mprintf("%s", buff);
 	}
 	if (strstr(buff, "ERROR\n")) {
 	    logg("%s", buff);
 	    mprintf("%s", buff);
 	    waserror = 1;
 	}
     }
 
     fclose(fd);
 
     if(!infected)
 	mprintf("%s: OK\n", filename);
 
     return infected ? infected : (waserror ? -1 : 0);
 }
 
 int dsstream(int sockd)
 {
 	int wsockd, loopw = 60, bread, port, infected = 0;
 	struct sockaddr_in server;

 	struct sockaddr_in peer;
 	int peer_size;

 	char buff[4096], *pt;
 
     if(write(sockd, "STREAM", 6) <= 0) {
 	mprintf("@Can't write to the socket.\n");
 	return 2;
     }
 
     memset(buff, 0, sizeof(buff));
     while(loopw) {
 	read(sockd, buff, sizeof(buff));
 	if((pt = strstr(buff, "PORT"))) {
 	    pt += 5;
 	    sscanf(pt, "%d", &port);
 	    break;
 	}
 	loopw--;
     }
 
     if(!loopw) {
 	mprintf("@Daemon not ready for stream scanning.\n");
 	return -1;
     }
 
     /* connect to clamd */
 
     if((wsockd = socket(SOCKET_INET, SOCK_STREAM, 0)) < 0) {
 	perror("socket()");
 	mprintf("@Can't create the socket.\n");
 	return -1;
     }
 
     server.sin_family = AF_INET;
     server.sin_port = htons(port);
 

     peer_size = sizeof(peer);
     if(getpeername(sockd, (struct sockaddr *) &peer, &peer_size) < 0) {
 	perror("getpeername()");
 	mprintf("@Can't get socket peer name.\n");
 	return -1;
     }
 

     switch (peer.sin_family) {
 	case AF_UNIX:
 	    server.sin_addr.s_addr = inet_addr("127.0.0.1");
 	    break;
 	case AF_INET:
 	    server.sin_addr.s_addr = peer.sin_addr.s_addr;
 	    break;
 	default:
 	    mprintf("@Unexpected socket type: %d.\n", peer.sin_family);
 	    return -1;
     }

     if(connect(wsockd, (struct sockaddr *) &server, sizeof(struct sockaddr_in)) < 0) {
 	close(wsockd);
 	perror("connect()");
 	mprintf("@Can't connect to clamd [port: %d].\n", port);
 	return -1;
     }
 
     while((bread = read(0, buff, sizeof(buff))) > 0) {
 	if(write(wsockd, buff, bread) <= 0) {
 	    mprintf("@Can't write to the socket.\n");
 	    close(wsockd);
 	    return -1;
 	}
     }
     close(wsockd);
 
     memset(buff, 0, sizeof(buff));
     while((bread = read(sockd, buff, sizeof(buff))) > 0) {
 	mprintf("%s", buff);
 	if(strstr(buff, "FOUND\n")) {
 	    infected++;
 	    logg("%s", buff);
 	}
 	if(strstr(buff, "ERROR\n")) {
 	    logg("%s", buff);
 	    return -1;
 	}
 	memset(buff, 0, sizeof(buff));
     }
 
     return infected;
 }
 
 char *abpath(const char *filename)
 {
 	struct stat foo;
 	char *fullpath, cwd[200];
 
     if(stat(filename, &foo) == -1) {
 	mprintf("@Can't access file %s\n", filename);
 	perror(filename);
 	return NULL;
     } else {
 	fullpath = mcalloc(200 + strlen(filename) + 10, sizeof(char));
 #ifdef C_CYGWIN
 	sprintf(fullpath, "%s", filename);
 #else
 	if(!getcwd(cwd, 200)) {
 	    mprintf("@Can't get absolute pathname of current working directory.\n");
 	    return NULL;
 	}
 	sprintf(fullpath, "%s/%s", cwd, filename);
 #endif
     }
 
     return fullpath;
 }
 
 int dconnect(const struct optstruct *opt)

 {
 	struct sockaddr_un server;

 	struct sockaddr_in server2;

 	struct hostent *he;

 	struct cfgstruct *copt, *cpt;
 	const char *clamav_conf = getargl(opt, "config-file");

 	int sockd;
 

 
     if(!clamav_conf)
 	clamav_conf = DEFAULT_CFG;
 

     if((copt = parsecfg(clamav_conf, 1)) == NULL) {
 	mprintf("@Can't parse the configuration file.\n");

 	return -1;

     }
 

     /* Set default address to connect to */

     server2.sin_addr.s_addr = inet_addr("127.0.0.1");    

 
     if(cfgopt(copt, "TCPSocket") && cfgopt(copt, "LocalSocket")) {
 	mprintf("@Clamd is not configured properly.\n");

 	return -1;

     } else if((cpt = cfgopt(copt, "LocalSocket"))) {
 
 	server.sun_family = AF_UNIX;

 	strncpy(server.sun_path, cpt->strarg, sizeof(server.sun_path));

 
 	if((sockd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
 	    perror("socket()");
 	    mprintf("@Can't create the socket.\n");

 	    return -1;

 	}
 
 	if(connect(sockd, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) < 0) {
 	    close(sockd);
 	    perror("connect()");
 	    mprintf("@Can't connect to clamd.\n");

 	    return -1;

 	}
 
     } else if((cpt = cfgopt(copt, "TCPSocket"))) {
 

 	if((sockd = socket(SOCKET_INET, SOCK_STREAM, 0)) < 0) {

 	    perror("socket()");
 	    mprintf("@Can't create the socket.\n");

 	    return -1;

 	}
 
 	server2.sin_family = AF_INET;
 	server2.sin_port = htons(cpt->numarg);
 

 	if((cpt = cfgopt(copt, "TCPAddr"))) {
 	    if ((he = gethostbyname(cpt->strarg)) == 0) {
 		close(sockd);
 		perror("gethostbyname()");
 		mprintf("@Can't lookup clamd hostname.\n");

 		return -1;

 	    }
 	    server2.sin_addr = *(struct in_addr *) he->h_addr_list[0];

 	}

 	if(connect(sockd, (struct sockaddr *) &server2, sizeof(struct sockaddr_in)) < 0) {
 	    close(sockd);
 	    perror("connect()");
 	    mprintf("@Can't connect to clamd.\n");

 	    return -1;

 	}
 
     } else {
 	mprintf("@Clamd is not configured properly.\n");

 	return -1;

     }
 

     return sockd;
 }

 int client(const struct optstruct *opt, int *infected)
 {
 	char cwd[200], *fullpath;
 	int sockd, ret, errors = 0;
 	struct stat sb;

     *infected = 0;

     /* parse argument list */

     if(opt->filename == NULL || strlen(opt->filename) == 0) {
 	/* scan current directory */
 	if(!getcwd(cwd, 200)) {
 	    mprintf("@Can't get absolute pathname of current working directory.\n");

 	    return 2;
 	}
 

 	if((sockd = dconnect(opt)) < 0)

 	    return 2;
 

 	if((ret = dsfile(sockd, cwd)) >= 0)
 	    *infected += ret;
 	else
 	    errors++;

 	close(sockd);

     } else if(!strcmp(opt->filename, "-")) { /* scan data from stdin */
 	if((sockd = dconnect(opt)) < 0)

 	    return 2;
 

 	if((ret = dsstream(sockd)) >= 0)
 	    *infected += ret;
 	else
 	    errors++;

 
 	close(sockd);
 

     } else {
 	int x;
 	char *thefilename;
 	for (x = 0; (thefilename = cli_strtok(opt->filename, x, "\t")) != NULL; x++) {
 	    fullpath = thefilename;
 
 	    if(stat(fullpath, &sb) == -1) {
 		mprintf("@Can't access file %s\n", fullpath);
 		perror(fullpath);
 		errors++;
 	    } else {
 		if(fullpath[0] != '/') {
 		    fullpath = abpath(thefilename);
 		    free(thefilename);
 
 		    if(!fullpath) {
 			mprintf("@Can't determine absolute path.\n");
 			return 2;
 		    }
 		}
 
 		switch(sb.st_mode & S_IFMT) {
 		    case S_IFREG:
 		    case S_IFDIR:
 			if((sockd = dconnect(opt)) < 0)
 			    return 2;
 
 			if((ret = dsfile(sockd, fullpath)) >= 0)
 			    *infected += ret;
 			else
 			    errors++;
 
 			close(sockd);
 			break;
 
 		    default:
 			mprintf("@Not supported file type (%s)\n", fullpath);
 			errors++;
 		}
 	    }

 	    free(fullpath);

 	}
     }
 

     return *infected ? 1 : (errors ? 2 : 0);

 }