Commit | Line | Data |
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410c8acf | 1 | /* -*-c-*- |
410c8acf | 2 | * |
3 | * Main program | |
4 | * | |
5 | * (c) 2001 Straylight/Edgeware | |
6 | */ | |
7 | ||
e04c2d50 | 8 | /*----- Licensing notice --------------------------------------------------* |
410c8acf | 9 | * |
10 | * This file is part of Trivial IP Encryption (TrIPE). | |
11 | * | |
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. | |
e04c2d50 | 16 | * |
410c8acf | 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. | |
e04c2d50 | 21 | * |
410c8acf | 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. | |
25 | */ | |
26 | ||
410c8acf | 27 | /*----- Header files ------------------------------------------------------*/ |
28 | ||
29 | #include "tripe.h" | |
30 | ||
31 | /*----- Global variables --------------------------------------------------*/ | |
32 | ||
33 | sel_state sel; | |
410c8acf | 34 | |
35 | /*----- Static variables --------------------------------------------------*/ | |
36 | ||
37 | static sel_timer it; | |
38 | #define T_INTERVAL MIN(1) | |
39 | ||
40 | /*----- Main code ---------------------------------------------------------*/ | |
41 | ||
42 | /* --- @interval@ --- * | |
43 | * | |
44 | * Arguments: @struct timeval *tv@ = time when called | |
45 | * @void *v@ = boring pointer | |
46 | * | |
47 | * Returns: --- | |
48 | * | |
49 | * Use: Called periodically to do housekeeping tasks. | |
50 | */ | |
51 | ||
42da2a58 | 52 | static void interval(struct timeval *tv, void *v) |
410c8acf | 53 | { |
54 | struct timeval tvv; | |
55 | T( trace(T_PEER, "peer: interval timer"); ) | |
b5c45da1 | 56 | rand_seed(RAND_GLOBAL, MAXHASHSZ); |
410c8acf | 57 | p_interval(); |
58 | tvv = *tv; | |
59 | tvv.tv_sec += T_INTERVAL; | |
60 | sel_addtimer(&sel, &it, &tvv, interval, v); | |
61 | } | |
62 | ||
63 | /* --- @main@ --- * | |
64 | * | |
65 | * Arguments: @int argc@ = number of command line arguments | |
66 | * @char *argv[]@ = vector of arguments | |
67 | * | |
68 | * Returns: Zero if OK, nonzero on error. | |
69 | * | |
70 | * Use: Main program. Provides a simple VPN. | |
71 | */ | |
72 | ||
73 | static void usage(FILE *fp) | |
74 | { | |
46dde080 | 75 | pquis(fp, "Usage: $ [-DF] [-d DIR] [-b ADDR] [-p PORT] [-n TUNNEL]\n\ |
2d752320 | 76 | [-U USER] [-G GROUP] [-a SOCKET] [-T TRACE-OPTS]\n\ |
77 | [-k PRIV-KEYRING] [-K PUB-KEYRING] [-t KEY-TAG]\n"); | |
410c8acf | 78 | } |
79 | ||
f98df549 | 80 | static void version(FILE *fp) { pquis(fp, "$, version " VERSION "\n"); } |
410c8acf | 81 | |
82 | static void help(FILE *fp) | |
83 | { | |
84 | version(fp); | |
85 | fputc('\n', fp); | |
86 | usage(fp); | |
87 | fputs("\n\ | |
88 | Options:\n\ | |
89 | \n\ | |
90 | -h, --help Display this help text.\n\ | |
91 | -v, --version Display version number.\n\ | |
92 | -u, --usage Display pointless usage message.\n\ | |
42da2a58 | 93 | --tunnels Display IP tunnel drivers and exit.\n\ |
410c8acf | 94 | \n\ |
95 | -D, --daemon Run in the background.\n\ | |
46dde080 | 96 | -F, --foreground Quit when stdin reports end-of-file.\n\ |
ef4a1ab7 | 97 | -d, --directory=DIR Switch to directory DIR [default " CONFIGDIR "].\n\ |
d13e5724 | 98 | -b, --bind-address=ADDR Bind UDP socket to this IP ADDR.\n\ |
165efde7 MW |
99 | -p, --port=PORT Select UDP port to listen to " |
100 | "[default " STR(TRIPE_PORT) "].\n\ | |
42da2a58 | 101 | -n, --tunnel=TUNNEL Seelect default tunnel driver.\n\ |
d13e5724 | 102 | -U, --setuid=USER Set uid to USER after initialization.\n\ |
103 | -G, --setgid=GROUP Set gid to GROUP after initialization.\n\ | |
410c8acf | 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\ | |
c5a2ea9b | 108 | " T( "\ |
410c8acf | 109 | -T, --trace=OPTIONS Turn on tracing options.\n\ |
c5a2ea9b | 110 | " ) "\ |
410c8acf | 111 | ", fp); |
112 | } | |
113 | ||
114 | int main(int argc, char *argv[]) | |
115 | { | |
116 | const char *kr_priv = "keyring", *kr_pub = "keyring.pub"; | |
fc5f4823 | 117 | const char *tag_priv = 0; |
ef4a1ab7 | 118 | const char *csock = SOCKETDIR "/tripesock"; |
119 | const char *dir = CONFIGDIR; | |
410c8acf | 120 | const char *p; |
165efde7 | 121 | unsigned port = TRIPE_PORT; |
767b36e2 | 122 | struct in_addr baddr = { INADDR_ANY }; |
410c8acf | 123 | unsigned f = 0; |
42da2a58 | 124 | int i; |
125 | int selerr = 0; | |
46dde080 | 126 | unsigned af; |
42da2a58 | 127 | struct timeval tv; |
410c8acf | 128 | uid_t u = -1; |
129 | gid_t g = -1; | |
130 | ||
131 | #define f_bogus 1u | |
132 | #define f_daemon 2u | |
46dde080 | 133 | #define f_foreground 4u |
410c8acf | 134 | |
135 | ego(argv[0]); | |
d360f042 | 136 | T( trace_on(stderr, 0); ) |
410c8acf | 137 | |
138 | if ((p = getenv("TRIPEDIR")) != 0) | |
139 | dir = p; | |
797cf76b MW |
140 | if ((p = getenv("TRIPESOCK")) != 0) |
141 | csock = p; | |
42da2a58 | 142 | tun_default = tunnels[0]; |
410c8acf | 143 | |
144 | for (;;) { | |
145 | static const struct option opts[] = { | |
146 | { "help", 0, 0, 'h' }, | |
147 | { "version", 0, 0, 'v' }, | |
148 | { "usage", 0, 0, 'u' }, | |
42da2a58 | 149 | { "tunnels", 0, 0, '0' }, |
410c8acf | 150 | |
151 | { "daemon", 0, 0, 'D' }, | |
46dde080 | 152 | { "foreground", 0, 0, 'F' }, |
410c8acf | 153 | { "uid", OPTF_ARGREQ, 0, 'U' }, |
154 | { "setuid", OPTF_ARGREQ, 0, 'U' }, | |
155 | { "gid", OPTF_ARGREQ, 0, 'G' }, | |
156 | { "setgid", OPTF_ARGREQ, 0, 'G' }, | |
767b36e2 | 157 | { "bind-address", OPTF_ARGREQ, 0, 'b' }, |
42da2a58 | 158 | { "tunnel", OPTF_ARGREQ, 0, 'n' }, |
410c8acf | 159 | { "port", OPTF_ARGREQ, 0, 'p' }, |
160 | { "directory", OPTF_ARGREQ, 0, 'd' }, | |
161 | { "priv-keyring", OPTF_ARGREQ, 0, 'k' }, | |
162 | { "pub-keyring", OPTF_ARGREQ, 0, 'K' }, | |
163 | { "tag", OPTF_ARGREQ, 0, 't' }, | |
164 | { "admin-socket", OPTF_ARGREQ, 0, 'a' }, | |
165 | #ifndef NTRACE | |
166 | { "trace", OPTF_ARGREQ, 0, 'T' }, | |
167 | #endif | |
168 | ||
169 | { 0, 0, 0, 0 } | |
170 | }; | |
171 | ||
46dde080 | 172 | i = mdwopt(argc, argv, "hvuDFU:G:b:n:p:d:k:K:t:a:" T("T:"), |
42da2a58 | 173 | opts, 0, 0, 0); |
410c8acf | 174 | if (i < 0) |
175 | break; | |
176 | switch (i) { | |
177 | case 'h': | |
178 | help(stdout); | |
179 | exit(0); | |
180 | case 'v': | |
181 | version(stdout); | |
182 | exit(0); | |
183 | case 'u': | |
184 | usage(stdout); | |
185 | exit(0); | |
186 | ||
187 | case 'D': | |
188 | f |= f_daemon; | |
189 | break; | |
52b86648 MW |
190 | case 'U': |
191 | u = u_getuser(optarg, &g); | |
192 | break; | |
193 | case 'G': | |
194 | g = u_getgroup(optarg); | |
195 | break; | |
46dde080 MW |
196 | case 'F': |
197 | f |= f_foreground; | |
198 | break; | |
767b36e2 | 199 | |
200 | case 'b': { | |
201 | struct hostent *h = gethostbyname(optarg); | |
202 | if (!h) | |
203 | die(EXIT_FAILURE, "unknown host name `%s'", optarg); | |
204 | memcpy(&baddr, h->h_addr, sizeof(struct in_addr)); | |
205 | } break; | |
410c8acf | 206 | case 'p': { |
207 | char *p; | |
208 | unsigned long i = strtoul(optarg, &p, 0); | |
209 | if (*p) { | |
210 | struct servent *s = getservbyname(optarg, "udp"); | |
211 | if (!s) | |
212 | die(EXIT_FAILURE, "unknown service name `%s'", optarg); | |
213 | i = ntohs(s->s_port); | |
214 | } | |
165efde7 | 215 | if (i >= 65536) |
410c8acf | 216 | die(EXIT_FAILURE, "bad port number %lu", i); |
217 | port = i; | |
218 | } break; | |
42da2a58 | 219 | case 'n': { |
220 | int i; | |
221 | for (i = 0;; i++) { | |
222 | if (!tunnels[i]) | |
223 | die(EXIT_FAILURE, "unknown tunnel `%s'", optarg); | |
224 | if (mystrieq(optarg, tunnels[i]->name)) | |
225 | break; | |
226 | } | |
227 | tun_default = tunnels[i]; | |
228 | } break; | |
410c8acf | 229 | case 'd': |
230 | dir = optarg; | |
231 | break; | |
232 | case 'k': | |
233 | kr_priv = optarg; | |
234 | break; | |
235 | case 'K': | |
236 | kr_pub = optarg; | |
237 | break; | |
238 | case 'a': | |
239 | csock = optarg; | |
240 | break; | |
241 | case 't': | |
242 | tag_priv = optarg; | |
243 | break; | |
244 | #ifndef NTRACE | |
245 | case 'T': | |
246 | tr_flags = traceopt(tr_opts, optarg, tr_flags, 0); | |
247 | trace_level(tr_flags); | |
248 | break; | |
249 | #endif | |
ef4a1ab7 | 250 | case '0': { |
42da2a58 | 251 | int i; |
252 | for (i = 0; tunnels[i]; i++) | |
253 | puts(tunnels[i]->name); | |
ef4a1ab7 | 254 | exit(0); |
255 | } break; | |
410c8acf | 256 | default: |
257 | f |= f_bogus; | |
258 | break; | |
259 | } | |
260 | } | |
261 | ||
262 | if (optind < argc || (f & f_bogus)) { | |
263 | usage(stderr); | |
264 | exit(EXIT_FAILURE); | |
265 | } | |
46dde080 MW |
266 | if (!(~f & (f_daemon | f_foreground))) |
267 | die(EXIT_FAILURE, "foreground operation for a daemon is silly"); | |
410c8acf | 268 | |
269 | if (chdir(dir)) { | |
270 | die(EXIT_FAILURE, "can't set current directory to `%s': %s", | |
271 | dir, strerror(errno)); | |
272 | } | |
273 | ||
274 | sel_init(&sel); | |
275 | sig_init(&sel); | |
276 | rand_noisesrc(RAND_GLOBAL, &noise_source); | |
b5c45da1 | 277 | rand_seed(RAND_GLOBAL, MAXHASHSZ); |
410c8acf | 278 | signal(SIGPIPE, SIG_IGN); |
42da2a58 | 279 | for (i = 0; tunnels[i]; i++) |
280 | tunnels[i]->init(); | |
767b36e2 | 281 | p_init(baddr, port); |
3cdc3f3a | 282 | if (!(f & f_daemon)) { |
46dde080 | 283 | af = AF_WARN; |
3cdc3f3a | 284 | #ifndef NTRACE |
46dde080 | 285 | af |= AF_TRACE; |
3cdc3f3a | 286 | #endif |
46dde080 MW |
287 | if (f & f_foreground) |
288 | af |= AF_FOREGROUND; | |
289 | a_create(STDIN_FILENO, STDOUT_FILENO, af); | |
3cdc3f3a | 290 | } |
388e0319 | 291 | ps_split(f & f_daemon); |
aa2405e8 | 292 | a_init(csock, u, g); |
52b86648 | 293 | u_setugid(u, g); |
410c8acf | 294 | km_init(kr_priv, kr_pub, tag_priv); |
410c8acf | 295 | if (f & f_daemon) { |
19dd2531 | 296 | if (daemonize()) |
410c8acf | 297 | die(EXIT_FAILURE, "couldn't become a daemon: %s", strerror(errno)); |
298 | a_daemon(); | |
299 | } | |
300 | ||
42da2a58 | 301 | tv.tv_sec = time(0) + T_INTERVAL; |
302 | tv.tv_usec = 0; | |
303 | sel_addtimer(&sel, &it, &tv, interval, 0); | |
410c8acf | 304 | |
42da2a58 | 305 | for (;;) { |
c511e1f9 | 306 | a_preselect(); |
42da2a58 | 307 | if (!sel_select(&sel)) |
308 | selerr = 0; | |
309 | else if (errno != EINTR && errno != EAGAIN) { | |
f43df819 | 310 | a_warn("SERVER", "select-error", "?ERRNO", A_END); |
42da2a58 | 311 | selerr++; |
312 | if (selerr > 8) { | |
f43df819 | 313 | a_warn("ABORT", "repeated-select-errors", A_END); |
42da2a58 | 314 | abort(); |
410c8acf | 315 | } |
316 | } | |
317 | } | |
318 | ||
319 | return (0); | |
320 | } | |
321 | ||
322 | /*----- That's all, folks -------------------------------------------------*/ |