/*

  *  Copyright (C) 2002 - 2007 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 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.

  */
 

 #ifdef	_MSC_VER
 #include <winsock.h>
 #endif
 

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

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 #ifdef	HAVE_UNISTD_H

 #include <unistd.h>

 #endif

 #include <sys/types.h>

 #ifndef	C_WINDOWS

 #include <dirent.h>

 #include <sys/socket.h>

 #include <sys/time.h>

 #endif

 #include <pthread.h>
 #include <time.h>

 #include <errno.h>

 #include <stddef.h>

 #include "libclamav/clamav.h"
 #include "libclamav/str.h"
 
 #include "shared/cfgparser.h"
 #include "shared/output.h"

 #include "shared/misc.h"

 #include "others.h"
 #include "scanner.h"
 #include "server.h"
 #include "session.h"
 

 static pthread_mutex_t ctime_mutex = PTHREAD_MUTEX_INITIALIZER;

 int command(int desc, const struct cl_engine *engine, const struct cl_limits *limits, unsigned int options, const struct cfgstruct *copt, int timeout)

 {
 	char buff[1025];

 	int bread, opt;

     bread = readsock(desc, buff, sizeof(buff)-1, '\n', timeout, 0, 1);
     if(bread == -2) /* timeout */

 	return -2;

     if(bread == 0) /* Connection closed */

 	return -1;

     if(bread < 0) {

 	mdprintf(desc, "ERROR\n");
 	logg("!Command: readsock() failed.\n");

 	return -1;
     }
 
     buff[bread] = 0;

     cli_chomp(buff);

 
     if(!strncmp(buff, CMD1, strlen(CMD1))) { /* SCAN */

 	if(scan(buff + strlen(CMD1) + 1, NULL, engine, limits, options, copt, desc, TYPE_SCAN) == -2)

 	    if(cfgopt(copt, "ExitOnOOM")->enabled)

 		return COMMAND_SHUTDOWN;

 
     } else if(!strncmp(buff, CMD2, strlen(CMD2))) { /* RAWSCAN */

 	opt = options & ~CL_SCAN_ARCHIVE;

 	if(scan(buff + strlen(CMD2) + 1, NULL, engine, NULL, opt, copt, desc, TYPE_SCAN) == -2)

 	    if(cfgopt(copt, "ExitOnOOM")->enabled)

 		return COMMAND_SHUTDOWN;

 
     } else if(!strncmp(buff, CMD3, strlen(CMD3))) { /* QUIT */

 	return COMMAND_SHUTDOWN;

 
     } else if(!strncmp(buff, CMD4, strlen(CMD4))) { /* RELOAD */
 	mdprintf(desc, "RELOADING\n");
 	return COMMAND_RELOAD;
 
     } else if(!strncmp(buff, CMD5, strlen(CMD5))) { /* PING */
 	mdprintf(desc, "PONG\n");
 
     } else if(!strncmp(buff, CMD6, strlen(CMD6))) { /* CONTSCAN */

 	if(scan(buff + strlen(CMD6) + 1, NULL, engine, limits, options, copt, desc, TYPE_CONTSCAN) == -2)

 	    if(cfgopt(copt, "ExitOnOOM")->enabled)

 		return COMMAND_SHUTDOWN;

 
     } else if(!strncmp(buff, CMD7, strlen(CMD7))) { /* VERSION */

 	    const char *dbdir = cfgopt(copt, "DatabaseDirectory")->strarg;

 	    char *path;
 	    struct cl_cvd *daily;

 	    struct stat foo;

 	if(!(path = malloc(strlen(dbdir) + 30))) {

 	    mdprintf(desc, "Memory allocation error - SHUTDOWN forced\n");
 	    return COMMAND_SHUTDOWN;
 	}
 
 	sprintf(path, "%s/daily.cvd", dbdir);

 	if(stat(path, &foo) == -1)
 	    sprintf(path, "%s/daily.inc/daily.info", dbdir);

 
 	if((daily = cl_cvdhead(path))) {
 		time_t t = (time_t) daily->stime;
 
 	    pthread_mutex_lock(&ctime_mutex);
 	    mdprintf(desc, "ClamAV "VERSION"/%d/%s", daily->version, ctime(&t));
 	    pthread_mutex_unlock(&ctime_mutex);
 	    cl_cvdfree(daily);
 	} else {
 	    mdprintf(desc, "ClamAV "VERSION"\n");
 	}
 
 	free(path);

 
     } else if(!strncmp(buff, CMD8, strlen(CMD8))) { /* STREAM */

 	if(scanstream(desc, NULL, engine, limits, options, copt) == CL_EMEM)

 	    if(cfgopt(copt, "ExitOnOOM")->enabled)

 		return COMMAND_SHUTDOWN;

 
     } else if(!strncmp(buff, CMD9, strlen(CMD9))) { /* SESSION */

 	return COMMAND_SESSION;

 
     } else if(!strncmp(buff, CMD10, strlen(CMD10))) { /* END */
 	return COMMAND_END;
 
     } else if(!strncmp(buff, CMD11, strlen(CMD11))) { /* SHUTDOWN */

 	return COMMAND_SHUTDOWN;

     } else if(!strncmp(buff, CMD12, strlen(CMD12))) { /* FD */
 	    int fd = atoi(buff + strlen(CMD12) + 1);
 

 	scanfd(fd, NULL, engine, limits, options, copt, desc);

 	close(fd); /* FIXME: should we close it here? */
 

     } else if(!strncmp(buff, CMD13, strlen(CMD13))) { /* MULTISCAN */

 	if(scan(buff + strlen(CMD13) + 1, NULL, engine, limits, options, copt, desc, TYPE_MULTISCAN) == -2)
 	    if(cfgopt(copt, "ExitOnOOM")->enabled)
 		return COMMAND_SHUTDOWN;

     } else {
 	mdprintf(desc, "UNKNOWN COMMAND\n");
     }
 
     return 0; /* no error and no 'special' command executed */
 }