5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Trivial IP Encryption (TrIPE).
12 * TrIPE is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * TrIPE is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with TrIPE; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
31 /*----- Global variables --------------------------------------------------*/
35 /*----- Static variables --------------------------------------------------*/
38 #define T_INTERVAL MIN(1)
40 /*----- Main code ---------------------------------------------------------*/
42 /* --- @interval@ --- *
44 * Arguments: @struct timeval *tv@ = time when called
45 * @void *v@ = boring pointer
49 * Use: Called periodically to do housekeeping tasks.
52 static void interval(struct timeval *tv, void *v)
55 T( trace(T_PEER, "peer: interval timer"); )
56 rand_seed(RAND_GLOBAL, MAXHASHSZ);
59 tvv.tv_sec += T_INTERVAL;
60 sel_addtimer(&sel, &it, &tvv, interval, v);
65 * Arguments: @int argc@ = number of command line arguments
66 * @char *argv[]@ = vector of arguments
68 * Returns: Zero if OK, nonzero on error.
70 * Use: Main program. Provides a simple VPN.
73 static void usage(FILE *fp)
75 pquis(fp, "Usage: $ [-DF] [-d DIR] [-b ADDR] [-p PORT] [-n TUNNEL]\n\
76 [-U USER] [-G GROUP] [-a SOCKET] [-m MODE] [-T TRACE-OPTS]\n\
77 [-k PRIV-KEYRING] [-K PUB-KEYRING] [-t KEY-TAG]\n");
80 static void version(FILE *fp) { pquis(fp, "$, version " VERSION "\n"); }
82 static void help(FILE *fp)
90 -h, --help Display this help text.\n\
91 -v, --version Display version number.\n\
92 -u, --usage Display pointless usage message.\n\
93 --tunnels Display IP tunnel drivers and exit.\n\
95 -D, --daemon Run in the background.\n\
96 -F, --foreground Quit when stdin reports end-of-file.\n\
97 -d, --directory=DIR Switch to directory DIR [default " CONFIGDIR "].\n\
98 -b, --bind-address=ADDR Bind UDP socket to this IP ADDR.\n\
99 -p, --port=PORT Select UDP port to listen to "
100 "[default " STR(TRIPE_PORT) "].\n\
101 -n, --tunnel=TUNNEL Seelect default tunnel driver.\n\
102 -U, --setuid=USER Set uid to USER after initialization.\n\
103 -G, --setgid=GROUP Set gid to GROUP after initialization.\n\
104 -k, --priv-keyring=FILE Get private key from FILE.\n\
105 -K, --pub-keyring=FILE Get public keys from FILE.\n\
106 -t, --tag=KEYTAG Use private key labelled TAG.\n\
107 -a, --admin-socket=FILE Use FILE as the adminstration socket.\n\
108 -m, --admin-perms=MODE Permissions to set on admin socket [default 600].\n\
110 -T, --trace=OPTIONS Turn on tracing options.\n\
115 int main(int argc, char *argv[])
117 const char *kr_priv = "keyring", *kr_pub = "keyring.pub";
118 const char *tag_priv = 0;
119 const char *csock = SOCKETDIR "/tripesock";
120 int csockmode = 0600;
121 const char *dir = CONFIGDIR;
123 unsigned port = TRIPE_PORT;
124 struct in_addr baddr = { INADDR_ANY };
135 #define f_foreground 4u
138 T( trace_on(stderr, 0); )
140 if ((p = getenv("TRIPEDIR")) != 0)
142 if ((p = getenv("TRIPESOCK")) != 0)
144 tun_default = tunnels[0];
147 static const struct option opts[] = {
148 { "help", 0, 0, 'h' },
149 { "version", 0, 0, 'v' },
150 { "usage", 0, 0, 'u' },
151 { "tunnels", 0, 0, '0' },
153 { "daemon", 0, 0, 'D' },
154 { "foreground", 0, 0, 'F' },
155 { "uid", OPTF_ARGREQ, 0, 'U' },
156 { "setuid", OPTF_ARGREQ, 0, 'U' },
157 { "gid", OPTF_ARGREQ, 0, 'G' },
158 { "setgid", OPTF_ARGREQ, 0, 'G' },
159 { "bind-address", OPTF_ARGREQ, 0, 'b' },
160 { "tunnel", OPTF_ARGREQ, 0, 'n' },
161 { "port", OPTF_ARGREQ, 0, 'p' },
162 { "directory", OPTF_ARGREQ, 0, 'd' },
163 { "priv-keyring", OPTF_ARGREQ, 0, 'k' },
164 { "pub-keyring", OPTF_ARGREQ, 0, 'K' },
165 { "tag", OPTF_ARGREQ, 0, 't' },
166 { "admin-socket", OPTF_ARGREQ, 0, 'a' },
167 { "admin-perms", OPTF_ARGREQ, 0, 'm' },
169 { "trace", OPTF_ARGREQ, 0, 'T' },
175 i = mdwopt(argc, argv, "hvuDFU:G:b:n:p:d:k:K:t:a:m:" T("T:"),
194 u = u_getuser(optarg, &g);
197 g = u_getgroup(optarg);
204 struct hostent *h = gethostbyname(optarg);
206 die(EXIT_FAILURE, "unknown host name `%s'", optarg);
207 memcpy(&baddr, h->h_addr, sizeof(struct in_addr));
211 unsigned long i = strtoul(optarg, &p, 0);
213 struct servent *s = getservbyname(optarg, "udp");
215 die(EXIT_FAILURE, "unknown service name `%s'", optarg);
216 i = ntohs(s->s_port);
219 die(EXIT_FAILURE, "bad port number %lu", i);
226 die(EXIT_FAILURE, "unknown tunnel `%s'", optarg);
227 if (mystrieq(optarg, tunnels[i]->name))
230 tun_default = tunnels[i];
246 csockmode = strtol(optarg, &p, 8);
247 if (*p) die(EXIT_FAILURE, "bad permissions: `%s'", optarg);
254 tr_flags = traceopt(tr_opts, optarg, tr_flags, 0);
255 trace_level(tr_flags);
260 for (i = 0; tunnels[i]; i++)
261 puts(tunnels[i]->name);
270 if (optind < argc || (f & f_bogus)) {
274 if (!(~f & (f_daemon | f_foreground)))
275 die(EXIT_FAILURE, "foreground operation for a daemon is silly");
278 die(EXIT_FAILURE, "can't set current directory to `%s': %s",
279 dir, strerror(errno));
284 rand_noisesrc(RAND_GLOBAL, &noise_source);
285 rand_seed(RAND_GLOBAL, MAXHASHSZ);
286 signal(SIGPIPE, SIG_IGN);
287 for (i = 0; tunnels[i]; i++)
290 if (!(f & f_daemon)) {
295 if (f & f_foreground)
297 a_create(STDIN_FILENO, STDOUT_FILENO, af);
299 ps_split(f & f_daemon);
300 a_init(csock, u, g, csockmode);
302 km_init(kr_priv, kr_pub, tag_priv);
305 die(EXIT_FAILURE, "couldn't become a daemon: %s", strerror(errno));
309 tv.tv_sec = time(0) + T_INTERVAL;
311 sel_addtimer(&sel, &it, &tv, interval, 0);
315 if (!sel_select(&sel))
317 else if (errno != EINTR && errno != EAGAIN) {
318 a_warn("SERVER", "select-error", "?ERRNO", A_END);
321 a_warn("ABORT", "repeated-select-errors", A_END);
330 /*----- That's all, folks -------------------------------------------------*/