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https://github.com/yarrick/iodine.git
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Set server ip and mtu
This commit is contained in:
parent
c83d6d6983
commit
d15c72c29c
31
iodined.c
31
iodined.c
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@ -108,18 +108,21 @@ extern char *__progname;
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static void
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usage() {
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printf("Usage: %s [-v] [-h] [-f] [-u user] [-t chrootdir] topdomain\n", __progname);
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printf("Usage: %s [-v] [-h] [-f] [-u user] [-t chrootdir] [-m mtu] "
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"tunnel_ip topdomain\n", __progname);
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exit(2);
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}
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static void
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help() {
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printf("iodine IP over DNS tunneling server\n");
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printf("Usage: %s [-v] [-h] [-f] [-u user] [-t chrootdir] "
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"topdomain\n", __progname);
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printf("Usage: %s [-v] [-h] [-f] [-u user] [-t chrootdir] [-m mtu] "
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"tunnel_ip topdomain\n", __progname);
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printf(" -f to keep running in foreground\n");
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printf(" -u name to drop privileges and run as user 'name'\n");
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printf(" -t dir to chroot to directory dir\n");
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printf("tunnel_ip is the IP number of the local tunnel interface.\n");
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printf("topdomain is the FQDN that is delegated to this server.\n");
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exit(0);
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}
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@ -140,12 +143,15 @@ main(int argc, char **argv)
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char *newroot;
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char *username;
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int foreground;
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int mtu;
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struct passwd *pw;
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username = NULL;
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newroot = NULL;
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foreground = 0;
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mtu = 1024;
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while ((choice = getopt(argc, argv, "vfhu:t:")) != -1) {
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while ((choice = getopt(argc, argv, "vfhu:t:m:")) != -1) {
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switch(choice) {
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case 'v':
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version();
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@ -162,6 +168,9 @@ main(int argc, char **argv)
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case 't':
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newroot = optarg;
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break;
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case 'm':
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mtu = atoi(optarg);
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break;
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default:
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usage();
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break;
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@ -176,7 +185,7 @@ main(int argc, char **argv)
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usage();
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}
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if (argc != 1)
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if (argc != 2)
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usage();
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if (username) {
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@ -187,9 +196,16 @@ main(int argc, char **argv)
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}
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}
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if ((tun_fd = open_tun()) == -1)
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if (mtu == 0) {
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printf("Bad MTU given.\n");
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usage();
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}
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if ((tun_fd = open_tun()) == -1)
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goto cleanup0;
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if (tun_setip(argv[0]) != 0 || tun_setmtu(mtu) != 0)
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goto cleanup1;
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if ((dnsd_fd = open_dnsd(argv[0])) == -1)
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if ((dnsd_fd = open_dnsd(argv[1])) == -1)
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goto cleanup2;
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@ -220,6 +236,7 @@ cleanup2:
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close_dnsd(dnsd_fd);
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cleanup1:
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close_tun(tun_fd);
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cleanup0:
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return 0;
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}
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12
tun.c
12
tun.c
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@ -31,7 +31,7 @@
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#define TUN_MAX_TRY 50
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char *tun_device = NULL;
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char *if_device = NULL;
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char *if_name = NULL;
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#ifdef LINUX
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@ -63,7 +63,7 @@ open_tun()
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if (ioctl(tun_fd, TUNSETIFF, (void *) &ifreq) != -1) {
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printf("Opened %s\n", ifreq.ifr_name);
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if_device = strdup(ifreq.ifr_name);
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if_name = strdup(ifreq.ifr_name);
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return tun_fd;
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}
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@ -98,7 +98,7 @@ open_tun()
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if ((tun_fd = open(tun_name, O_RDWR)) >= 0) {
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printf("Opened %s\n", tun_name);
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if_device = strdup(tun_name);
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if_name = strdup(tun_name);
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return tun_fd;
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}
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@ -158,7 +158,7 @@ tun_setip(const char *ip)
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if (inet_addr(ip) != 0) {
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snprintf(cmdline, sizeof(cmdline),
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"/sbin/ifconfig %s %s netmask 255.255.255.0",
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tun_device,
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if_name,
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ip);
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#ifndef LINUX
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int r;
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@ -173,6 +173,7 @@ tun_setip(const char *ip)
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}
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#endif
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printf("Setting IP of %s to %s\n", if_name, ip);
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return system(cmdline);
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}
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@ -187,9 +188,10 @@ tun_setmtu(const int mtu)
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if (mtu > 200 && mtu < 1500) {
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snprintf(cmdline, sizeof(cmdline),
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"/sbin/ifconfig %s mtu %d",
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tun_device,
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if_name,
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mtu);
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printf("Setting MTU of %s to %d\n", if_name, mtu);
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return system(cmdline);
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}
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