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/*
* (C) 2006-2007 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* 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.
*
* Description: UNIX sockets library
*/
#include "local.h"
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/un.h>
int local_server_create(struct local_server *server, struct local_conf *conf)
{
int fd;
socklen_t len;
struct sockaddr_un local;
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
return -1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &conf->reuseaddr,
sizeof(conf->reuseaddr)) == -1) {
close(fd);
unlink(conf->path);
return -1;
}
local.sun_family = AF_UNIX;
strcpy(local.sun_path, conf->path);
len = strlen(local.sun_path) + sizeof(local.sun_family);
unlink(conf->path);
if (bind(fd, (struct sockaddr *) &local, len) == -1) {
close(fd);
unlink(conf->path);
return -1;
}
if (listen(fd, conf->backlog) == -1) {
close(fd);
unlink(conf->path);
return -1;
}
server->fd = fd;
strcpy(server->path, conf->path);
return 0;
}
void local_server_destroy(struct local_server *server)
{
unlink(server->path);
close(server->fd);
}
int do_local_server_step(struct local_server *server, void *data,
void (*process)(int fd, void *data))
{
int rfd;
struct sockaddr_un local;
socklen_t sin_size = sizeof(struct sockaddr_un);
rfd = accept(server->fd, (struct sockaddr *) &local, &sin_size);
if (rfd == -1)
return -1;
process(rfd, data);
close(rfd);
return 0;
}
int local_client_create(struct local_conf *conf)
{
socklen_t len;
struct sockaddr_un local;
int fd;
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
return -1;
local.sun_family = AF_UNIX;
strcpy(local.sun_path, conf->path);
len = strlen(local.sun_path) + sizeof(local.sun_family);
if (connect(fd, (struct sockaddr *) &local, len) == -1) {
close(fd);
return -1;
}
return fd;
}
void local_client_destroy(int fd)
{
close(fd);
}
int do_local_client_step(int fd, void (*process)(char *buf))
{
int numbytes;
char buf[1024];
memset(buf, 0, sizeof(buf));
while ((numbytes = recv(fd, buf, sizeof(buf)-1, 0)) > 0) {
buf[sizeof(buf)-1] = '\0';
if (process)
process(buf);
memset(buf, 0, sizeof(buf));
}
return 0;
}
void local_step(char *buf)
{
printf("%s", buf);
}
int do_local_request(int request,
struct local_conf *conf,
void (*step)(char *buf))
{
int fd, ret;
fd = local_client_create(conf);
if (fd == -1)
return -1;
ret = send(fd, &request, sizeof(int), 0);
if (ret == -1)
return -1;
do_local_client_step(fd, step);
local_client_destroy(fd);
return 0;
}
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