--- /dev/null
+/* -*-c-*-
+ *
+ * Initialization for the standalone server
+ *
+ * (c) 2018 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Trivial IP Encryption (TrIPE).
+ *
+ * TrIPE is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * TrIPE is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with TrIPE. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include "tripe.h"
+
+/*----- Tunnel table ------------------------------------------------------*/
+
+static const tunnel_ops *tunnels[] = {
+#ifdef TUN_LINUX
+ &tun_linux,
+#endif
+#ifdef TUN_BSD
+ &tun_bsd,
+#endif
+#ifdef TUN_UNET
+ &tun_unet,
+#endif
+ &tun_slip,
+};
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @main@ --- *
+ *
+ * Arguments: @int argc@ = number of command line arguments
+ * @char *argv[]@ = vector of arguments
+ *
+ * Returns: Zero if OK, nonzero on error.
+ *
+ * Use: Main program. Provides a simple VPN.
+ */
+
+static void usage(FILE *fp)
+{
+ pquis(fp, "Usage: $ [-DF] [-d DIR] [-b ADDR] [-p PORT] [-n TUNNEL]\n\
+ [-U USER] [-G GROUP] [-a SOCKET] [-m MODE] [-T TRACE-OPTS]\n\
+ [-k PRIV-KEYRING] [-K PUB-KEYRING] [-t KEY-TAG]\n");
+}
+
+static void version(FILE *fp) { pquis(fp, "$, version " VERSION "\n"); }
+
+static void help(FILE *fp)
+{
+ version(fp);
+ fputc('\n', fp);
+ usage(fp);
+ fputs("\n\
+Options:\n\
+\n\
+-h, --help Display this help text.\n\
+-v, --version Display version number.\n\
+-u, --usage Display pointless usage message.\n\
+ --tunnels Display IP tunnel drivers and exit.\n\
+\n\
+-4, --ipv4 Transport over IPv4 only.\n\
+-6, --ipv6 Transport over IPv6 only.\n\
+-D, --daemon Run in the background.\n\
+-F, --foreground Quit when stdin reports end-of-file.\n\
+-d, --directory=DIR Switch to directory DIR [default " CONFIGDIR "].\n\
+-b, --bind-address=ADDR Bind UDP socket to this IP ADDR.\n\
+-p, --port=PORT Select UDP port to listen to "
+ "[default " STR(TRIPE_PORT) "].\n\
+-n, --tunnel=TUNNEL Seelect default tunnel driver.\n\
+-U, --setuid=USER Set uid to USER after initialization.\n\
+-G, --setgid=GROUP Set gid to GROUP after initialization.\n\
+-k, --priv-keyring=FILE Get private key from FILE.\n\
+-K, --pub-keyring=FILE Get public keys from FILE.\n\
+-t, --tag=KEYTAG Use private key labelled TAG.\n\
+-a, --admin-socket=FILE Use FILE as the adminstration socket.\n\
+-m, --admin-perms=MODE Permissions to set on admin socket [default 600].\n\
+" T( "\
+-T, --trace=OPTIONS Turn on tracing options.\n\
+" ) "\
+", fp);
+}
+
+int main(int argc, char *argv[])
+{
+ const char *kr_priv = "keyring", *kr_pub = "keyring.pub";
+ const char *tag_priv = 0;
+ const char *csock = SOCKETDIR "/tripesock";
+ int csockmode = 0600;
+ const char *dir = CONFIGDIR;
+ const char *p;
+ const char *bindhost = 0, *bindsvc = STR(TRIPE_PORT);
+ struct addrinfo aihint = { 0 }, *ailist;
+ const tunnel_ops *dflt = 0;
+ unsigned f = 0;
+ int i;
+ int err;
+ unsigned af;
+ uid_t u = -1;
+ gid_t g = -1;
+
+#define f_bogus 1u
+#define f_daemon 2u
+#define f_foreground 4u
+
+ ego(argv[0]);
+ T( trace_on(stderr, 0); )
+
+ if ((p = getenv("TRIPEDIR")) != 0)
+ dir = p;
+ if ((p = getenv("TRIPESOCK")) != 0)
+ csock = p;
+ aihint.ai_family = AF_UNSPEC;
+
+ for (;;) {
+ static const struct option opts[] = {
+ { "help", 0, 0, 'h' },
+ { "version", 0, 0, 'v' },
+ { "usage", 0, 0, 'u' },
+ { "tunnels", 0, 0, '0' },
+
+ { "ipv4", 0, 0, '4' },
+ { "ipv6", 0, 0, '6' },
+ { "daemon", 0, 0, 'D' },
+ { "foreground", 0, 0, 'F' },
+ { "uid", OPTF_ARGREQ, 0, 'U' },
+ { "setuid", OPTF_ARGREQ, 0, 'U' },
+ { "gid", OPTF_ARGREQ, 0, 'G' },
+ { "setgid", OPTF_ARGREQ, 0, 'G' },
+ { "bind-address", OPTF_ARGREQ, 0, 'b' },
+ { "tunnel", OPTF_ARGREQ, 0, 'n' },
+ { "port", OPTF_ARGREQ, 0, 'p' },
+ { "directory", OPTF_ARGREQ, 0, 'd' },
+ { "priv-keyring", OPTF_ARGREQ, 0, 'k' },
+ { "pub-keyring", OPTF_ARGREQ, 0, 'K' },
+ { "tag", OPTF_ARGREQ, 0, 't' },
+ { "admin-socket", OPTF_ARGREQ, 0, 'a' },
+ { "admin-perms", OPTF_ARGREQ, 0, 'm' },
+#ifndef NTRACE
+ { "trace", OPTF_ARGREQ, 0, 'T' },
+#endif
+
+ { 0, 0, 0, 0 }
+ };
+
+ i = mdwopt(argc, argv, "hvu46DFU:G:b:n:p:d:k:K:t:a:m:" T("T:"),
+ opts, 0, 0, 0);
+ if (i < 0)
+ break;
+ switch (i) {
+ case 'h':
+ help(stdout);
+ exit(0);
+ case 'v':
+ version(stdout);
+ exit(0);
+ case 'u':
+ usage(stdout);
+ exit(0);
+
+ case '4':
+ aihint.ai_family = AF_INET;
+ break;
+ case '6':
+ aihint.ai_family = AF_INET6;
+ break;
+ case 'D':
+ f |= f_daemon;
+ break;
+ case 'U':
+ u = u_getuser(optarg, &g);
+ break;
+ case 'G':
+ g = u_getgroup(optarg);
+ break;
+ case 'F':
+ f |= f_foreground;
+ break;
+
+ case 'b':
+ bindhost = optarg;
+ break;
+ case 'p':
+ bindsvc = optarg;
+ break;
+ case 'n': {
+ int i;
+ for (i = 0; i < N(tunnels); i++)
+ if (mystrieq(optarg, tunnels[i]->name))
+ { dflt = tunnels[i]; goto found_tun; }
+ die(EXIT_FAILURE, "unknown tunnel `%s'", optarg);
+ found_tun:;
+ } break;
+ case 'd':
+ dir = optarg;
+ break;
+ case 'k':
+ kr_priv = optarg;
+ break;
+ case 'K':
+ kr_pub = optarg;
+ break;
+ case 'a':
+ csock = optarg;
+ break;
+ case 'm': {
+ char *p;
+ csockmode = strtol(optarg, &p, 8);
+ if (*p) die(EXIT_FAILURE, "bad permissions: `%s'", optarg);
+ } break;
+ case 't':
+ tag_priv = optarg;
+ break;
+#ifndef NTRACE
+ case 'T':
+ tr_flags = traceopt(tr_opts, optarg, tr_flags, 0);
+ trace_level(tr_flags);
+ break;
+#endif
+ case '0': {
+ int i;
+ for (i = 0; i < N(tunnels); i++)
+ puts(tunnels[i]->name);
+ exit(0);
+ } break;
+ default:
+ f |= f_bogus;
+ break;
+ }
+ }
+
+ if (optind < argc || (f & f_bogus)) {
+ usage(stderr);
+ exit(EXIT_FAILURE);
+ }
+ if (!(~f & (f_daemon | f_foreground)))
+ die(EXIT_FAILURE, "foreground operation for a daemon is silly");
+
+ aihint.ai_protocol = IPPROTO_UDP;
+ aihint.ai_socktype = SOCK_DGRAM;
+ aihint.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
+ if ((err = getaddrinfo(bindhost, bindsvc, &aihint, &ailist)) != 0) {
+ die(EXIT_FAILURE, "couldn't resolve hostname %c%s%c, port `%s': %s",
+ bindhost ? '`' : '<',
+ bindhost ? bindhost : "nil",
+ bindhost ? '\'' : '>',
+ bindsvc, gai_strerror(err));
+ }
+
+ if (chdir(dir)) {
+ die(EXIT_FAILURE, "can't set current directory to `%s': %s",
+ dir, strerror(errno));
+ }
+
+ rand_noisesrc(RAND_GLOBAL, &noise_source);
+ rand_seed(RAND_GLOBAL, MAXHASHSZ);
+
+ lp_init();
+
+ if (!(f & f_daemon)) {
+ af = AF_WARN;
+#ifndef NTRACE
+ af |= AF_TRACE;
+#endif
+ if (f & f_foreground)
+ af |= AF_FOREGROUND;
+ a_create(STDIN_FILENO, STDOUT_FILENO, af);
+ a_switcherr();
+ }
+
+ p_init();
+ for (i = 0; i < N(tunnels); i++)
+ p_addtun(tunnels[i]);
+ if (dflt) p_setdflttun(dflt);
+ p_bind(ailist); freeaddrinfo(ailist);
+
+ for (i = 0; tunnels[i]; i++) {
+ if (tunnels[i]->flags&TUNF_PRIVOPEN) {
+ ps_split(f & f_daemon);
+ break;
+ }
+ }
+
+ a_init();
+ a_signals();
+ a_listen(csock, u, g, csockmode);
+ u_setugid(u, g);
+ km_init(kr_priv, kr_pub, tag_priv);
+ kx_init();
+ if (f & f_daemon) {
+ if (daemonize()) {
+ a_warn("SERVER", "daemon-error", "?ERRNO", A_END);
+ exit(EXIT_FAILURE);
+ }
+ a_daemon();
+ a_switcherr();
+ }
+
+ lp_run();
+
+ p_destroyall();
+ p_unbind();
+ a_unlisten();
+ km_clear();
+ ps_quit();
+ return (0);
+}
+
+/*----- That's all, folks -------------------------------------------------*/
~mdw / tripe / blobdiff