mirror of
https://github.com/yarrick/iodine.git
synced 2024-11-15 04:49:18 +02:00
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/* Copyright (c) 2006-2007 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <arpa/inet.h>
|
|
#include <arpa/nameser.h>
|
|
#include <netinet/in.h>
|
|
#ifdef DARWIN
|
|
#include <arpa/nameser8_compat.h>
|
|
#endif
|
|
#include <time.h>
|
|
#include <err.h>
|
|
#include <sys/stat.h>
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
#include "common.h"
|
|
|
|
int
|
|
open_dns(int localport, in_addr_t listen_ip)
|
|
{
|
|
struct sockaddr_in addr;
|
|
int flag;
|
|
int fd;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = htons(localport);
|
|
/* listen_ip already in network byte order from inet_addr, or 0 */
|
|
addr.sin_addr.s_addr = listen_ip;
|
|
|
|
if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
|
err(1, "socket");
|
|
|
|
flag = 1;
|
|
#ifdef SO_REUSEPORT
|
|
setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &flag, sizeof(flag));
|
|
#endif
|
|
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof(flag));
|
|
|
|
if(bind(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0)
|
|
err(1, "bind");
|
|
|
|
printf("Opened UDP socket\n");
|
|
|
|
return fd;
|
|
}
|
|
|
|
void
|
|
close_dns(int fd)
|
|
{
|
|
close(fd);
|
|
}
|
|
|
|
void
|
|
do_chroot(char *newroot)
|
|
{
|
|
if (chroot(newroot) != 0 || chdir("/") != 0)
|
|
err(1, "%s", newroot);
|
|
|
|
seteuid(geteuid());
|
|
setuid(getuid());
|
|
}
|
|
|
|
void
|
|
do_detach()
|
|
{
|
|
printf("Detaching from terminal...\n");
|
|
daemon(0, 0);
|
|
umask(0);
|
|
alarm(0);
|
|
}
|