/*

  *  Copyright (C) 2002 - 2005 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.

  */
 

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

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

 #ifndef	C_WINDOWS

 #include <sys/socket.h>

 #endif

 #include <sys/stat.h>

 #ifndef	C_WINDOWS

 #include <sys/un.h>

 #endif

 #include <errno.h>

 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif

 #include "libclamav/clamav.h"
 
 #include "shared/options.h"
 #include "shared/cfgparser.h"
 

 #include "others.h"
 #include "server.h"

 #include "output.h"

 #include "localserver.h"

 #ifdef C_WINDOWS

 int localserver(const struct cfgstruct *copt)

 {
     logg("!Localserver is not supported on this platform");
     return -1;
 }
 
 #else
 

 int localserver(const struct cfgstruct *copt)

 {
 	struct sockaddr_un server;
 	int sockfd, backlog;
 	struct stat foo;
 	char *estr;
 
     memset((char *) &server, 0, sizeof(server));
     server.sun_family = AF_UNIX;

     strncpy(server.sun_path, cfgopt(copt, "LocalSocket")->strarg, sizeof(server.sun_path));

 
     if((sockfd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
 	estr = strerror(errno);

 	logg("!Socket allocation error: %s\n", estr);

 	return -1;

     }
 
     if(bind(sockfd, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) == -1) {

 	if(errno == EADDRINUSE) {
 	    if(connect(sockfd, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) >= 0) {
 		logg("!Socket file %s is in use by another process.\n", server.sun_path);

 		close(sockfd);
 		return -1;

 	    }

 	    if(cfgopt(copt, "FixStaleSocket")->enabled) {

 		logg("^Socket file %s exists. Unclean shutdown? Removing...\n", server.sun_path);
 		if(unlink(server.sun_path) == -1) {
 		    estr = strerror(errno);
 		    logg("!Socket file %s could not be removed: %s\n", server.sun_path, estr);

 		    close(sockfd);
 		    return -1;

 		}
 		if(bind(sockfd, (struct sockaddr *) &server, sizeof(struct sockaddr_un)) == -1) {
 		    estr = strerror(errno);
 		    logg("!Socket file %s could not be bound: %s (unlink tried)\n", server.sun_path, estr);

 		    close(sockfd);
 		    return -1;

 		}
 	    } else if(stat(server.sun_path, &foo) != -1) {
 		logg("!Socket file %s exists. Either remove it, or configure a different one.\n", server.sun_path);

 		close(sockfd);
 		return -1;

 	    }
 	} else {
 	    estr = strerror(errno);
 	    logg("!Socket file %s could not be bound: %s\n", server.sun_path, estr);

 	    close(sockfd);
 	    return -1;

 	}

     }

     logg("Unix socket file %s\n", server.sun_path);

     backlog = cfgopt(copt, "MaxConnectionQueueLength")->numarg;

     logg("Setting connection queue length to %d\n", backlog);
 
     if(listen(sockfd, backlog) == -1) {
 	estr = strerror(errno);
 	logg("!listen() error: %s\n", estr);

 	close(sockfd);
 	return -1;

     }
 

     return sockfd;

 }

 #endif /* C_WINDOWS */