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
);
63 /* --- @mystrieq@ --- *
65 * Arguments: @const char *x, *y@ = two strings
67 * Returns: True if @x@ and @y are equal, up to case.
70 int mystrieq(const char *x
, const char *y
)
73 if (!*x
&& !*y
) return (1);
74 if (tolower((unsigned char)*x
) != tolower((unsigned char)*y
))
82 * Arguments: @int argc@ = number of command line arguments
83 * @char *argv[]@ = vector of arguments
85 * Returns: Zero if OK, nonzero on error.
87 * Use: Main program. Provides a simple VPN.
90 static void usage(FILE *fp
)
92 pquis(fp
, "Usage: $ [-D] [-d DIR] [-b ADDR] [-p PORT] [-n TUNNEL]\n\
93 [-U USER] [-G GROUP] [-a SOCKET] [-T TRACE-OPTS]\n\
94 [-k PRIV-KEYRING] [-K PUB-KEYRING] [-t KEY-TAG]\n");
97 static void version(FILE *fp
) { pquis(fp
, "$, version " VERSION
"\n"); }
99 static void help(FILE *fp
)
107 -h, --help Display this help text.\n\
108 -v, --version Display version number.\n\
109 -u, --usage Display pointless usage message.\n\
110 --tunnels Display IP tunnel drivers and exit.\n\
112 -D, --daemon Run in the background.\n\
113 -d, --directory=DIR Switch to directory DIR [default " CONFIGDIR
"].\n\
114 -b, --bind-address=ADDR Bind UDP socket to this IP ADDR.\n\
115 -p, --port=PORT Select UDP port to listen to "
116 "[default " STR(TRIPE_PORT
) "].\n\
117 -n, --tunnel=TUNNEL Seelect default tunnel driver.\n\
118 -U, --setuid=USER Set uid to USER after initialization.\n\
119 -G, --setgid=GROUP Set gid to GROUP after initialization.\n\
120 -k, --priv-keyring=FILE Get private key from FILE.\n\
121 -K, --pub-keyring=FILE Get public keys from FILE.\n\
122 -t, --tag=KEYTAG Use private key labelled TAG.\n\
123 -a, --admin-socket=FILE Use FILE as the adminstration socket.\n\
125 -T, --trace=OPTIONS Turn on tracing options.\n\
130 int main(int argc
, char *argv
[])
132 const char *kr_priv
= "keyring", *kr_pub
= "keyring.pub";
133 const char *tag_priv
= "tripe-dh";
134 const char *csock
= SOCKETDIR
"/tripesock";
135 const char *dir
= CONFIGDIR
;
137 unsigned port
= TRIPE_PORT
;
138 struct in_addr baddr
= { INADDR_ANY
};
150 T( trace_on(stderr
, 0); )
152 if ((p
= getenv("TRIPEDIR")) != 0)
154 if ((p
= getenv("TRIPESOCK")) != 0)
156 tun_default
= tunnels
[0];
159 static const struct option opts
[] = {
160 { "help", 0, 0, 'h' },
161 { "version", 0, 0, 'v' },
162 { "usage", 0, 0, 'u' },
163 { "tunnels", 0, 0, '0' },
165 { "daemon", 0, 0, 'D' },
166 { "uid", OPTF_ARGREQ
, 0, 'U' },
167 { "setuid", OPTF_ARGREQ
, 0, 'U' },
168 { "gid", OPTF_ARGREQ
, 0, 'G' },
169 { "setgid", OPTF_ARGREQ
, 0, 'G' },
170 { "bind-address", OPTF_ARGREQ
, 0, 'b' },
171 { "tunnel", OPTF_ARGREQ
, 0, 'n' },
172 { "port", OPTF_ARGREQ
, 0, 'p' },
173 { "directory", OPTF_ARGREQ
, 0, 'd' },
174 { "priv-keyring", OPTF_ARGREQ
, 0, 'k' },
175 { "pub-keyring", OPTF_ARGREQ
, 0, 'K' },
176 { "tag", OPTF_ARGREQ
, 0, 't' },
177 { "admin-socket", OPTF_ARGREQ
, 0, 'a' },
179 { "trace", OPTF_ARGREQ
, 0, 'T' },
185 i
= mdwopt(argc
, argv
, "hvuDU:G:b:p:d:k:K:t:a:" T("T:"),
206 unsigned long i
= strtoul(optarg
, &p
, 0);
210 pw
= getpwnam(optarg
);
212 die(EXIT_FAILURE
, "user `%s' not found", optarg
);
220 unsigned long i
= strtoul(optarg
, &p
, 0);
224 gr
= getgrnam(optarg
);
226 die(EXIT_FAILURE
, "group `%s' not found", optarg
);
231 struct hostent
*h
= gethostbyname(optarg
);
233 die(EXIT_FAILURE
, "unknown host name `%s'", optarg
);
234 memcpy(&baddr
, h
->h_addr
, sizeof(struct in_addr
));
238 unsigned long i
= strtoul(optarg
, &p
, 0);
240 struct servent
*s
= getservbyname(optarg
, "udp");
242 die(EXIT_FAILURE
, "unknown service name `%s'", optarg
);
243 i
= ntohs(s
->s_port
);
246 die(EXIT_FAILURE
, "bad port number %lu", i
);
253 die(EXIT_FAILURE
, "unknown tunnel `%s'", optarg
);
254 if (mystrieq(optarg
, tunnels
[i
]->name
))
257 tun_default
= tunnels
[i
];
276 tr_flags
= traceopt(tr_opts
, optarg
, tr_flags
, 0);
277 trace_level(tr_flags
);
282 for (i
= 0; tunnels
[i
]; i
++)
283 puts(tunnels
[i
]->name
);
292 if (optind
< argc
|| (f
& f_bogus
)) {
298 die(EXIT_FAILURE
, "can't set current directory to `%s': %s",
299 dir
, strerror(errno
));
304 rand_noisesrc(RAND_GLOBAL
, &noise_source
);
305 rand_seed(RAND_GLOBAL
, MAXHASHSZ
);
306 signal(SIGPIPE
, SIG_IGN
);
307 for (i
= 0; tunnels
[i
]; i
++)
310 if (!(f
& f_daemon
)) {
312 a_create(STDIN_FILENO
, STDOUT_FILENO
, AF_TRACE
| AF_WARN
);
314 a_create(STDIN_FILENO
, STDOUT_FILENO
, AF_WARN
);
317 if (g
!= (gid_t
)-1) {
318 if (setgid(g
) || (getuid() == 0 && setgroups(1, &g
))) {
319 die(EXIT_FAILURE
, "couldn't setgid to %u: %s",
320 (unsigned)g
, strerror(errno
));
323 if (u
!= (uid_t
)-1) {
325 die(EXIT_FAILURE
, "couldn't setuid to %u: %s",
326 (unsigned)u
, strerror(errno
));
329 km_init(kr_priv
, kr_pub
, tag_priv
);
333 die(EXIT_FAILURE
, "couldn't become a daemon: %s", strerror(errno
));
337 tv
.tv_sec
= time(0) + T_INTERVAL
;
339 sel_addtimer(&sel
, &it
, &tv
, interval
, 0);
343 if (!sel_select(&sel
))
345 else if (errno
!= EINTR
&& errno
!= EAGAIN
) {
346 a_warn("SERVER", "select-error", "?ERRNO", A_END
);
349 a_warn("ABORT", "repeated-select-errors", A_END
);
358 /*----- That's all, folks -------------------------------------------------*/