[tripe] / server / tripe.c

/* -*-c-*-
 *
 * Main program
 *
 * (c) 2001 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"

/*----- Global variables --------------------------------------------------*/

sel_state sel;

/*----- Static variables --------------------------------------------------*/

static sel_timer it;
#define T_INTERVAL MIN(1)

static unsigned iv_nreasons = 0;
static struct timeval iv_next = { 0, 0 };

/*----- The interval timer ------------------------------------------------*/

/* --- @interval@ --- *
 *
 * Arguments:	@struct timeval *tv@ = time when called
 *		@void *v@ = boring pointer
 *
 * Returns:	---
 *
 * Use:		Called periodically to do housekeeping tasks.
 */

static void interval(struct timeval *tv, void *v)
{
  T( trace(T_PEER, "peer: interval timer"); )
  iv_next = *tv;
  rand_seed(RAND_GLOBAL, MAXHASHSZ);
  p_interval();
  iv_next.tv_sec += T_INTERVAL;
  sel_addtimer(&sel, &it, &iv_next, interval, v);
}

/* --- @iv_addreason@ --- *
 *
 * Arguments:	---
 *
 * Returns:	---
 *
 * Use:		Adds an `interval timer reason'; if there are no others, the
 *		interval timer is engaged.
 */

void iv_addreason(void)
{
  struct timeval tv;

  if (!iv_nreasons) {
    gettimeofday(&tv, 0);
    if (TV_CMP(&tv, >=, &iv_next)) interval(&tv, 0);
    else sel_addtimer(&sel, &it, &iv_next, interval, 0);
  }
  iv_nreasons++;
}

/* --- @iv_rmreason@ --- *
 *
 * Arguments:	---
 *
 * Returns:	---
 *
 * Use:		Removes an interval timer reason; if there are none left, the
 *		interval timer is disengaged.
 */

void iv_rmreason(void)
{
  assert(iv_nreasons); iv_nreasons--;
  if (!iv_nreasons) sel_rmtimer(&it);
}

/*----- The main loop -----------------------------------------------------*/

/* --- @lp_init@ --- *
 *
 * Arguments:	---
 *
 * Returns:	---
 *
 * Use:		Initializes the main loop.  Most importantly, this sets up
 *		the select multiplexor that everything else hooks onto.
 */

void lp_init(void)
{
  rand_noisesrc(RAND_GLOBAL, &noise_source);
  rand_seed(RAND_GLOBAL, MAXHASHSZ);
  gettimeofday(&iv_next, 0); iv_next.tv_sec += T_INTERVAL;
  signal(SIGPIPE, SIG_IGN);
  sel_init(&sel);
  sig_init(&sel);
}

/* --- @lp_run@ --- *
 *
 * Arguments:	---
 *
 * Returns:	Zero on successful termination; @-1@ if things went wrong.
 *
 * Use:		Cranks the main loop until it should be cranked no more.
 */

int lp_run(void)
{
  int nerr = 0;

  for (;;) {
    a_preselect();
    if (!sel_select(&sel)) nerr = 0;
    else if (errno != EINTR && errno != EAGAIN) {
      a_warn("SERVER", "select-error", "?ERRNO", A_END);
      nerr++;
      if (nerr > 8) {
	a_warn("ABORT", "repeated-select-errors", A_END);
	abort();
      }
    }
  }
  return (0);
}

/*----- 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;
  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;
  tun_default = tunnels[0];
  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++) {
	  if (!tunnels[i])
	    die(EXIT_FAILURE, "unknown tunnel `%s'", optarg);
	  if (mystrieq(optarg, tunnels[i]->name))
	    break;
	}
	tun_default = tunnels[i];
      } 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; tunnels[i]; 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));
  }

  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; tunnels[i]; i++)
    tunnels[i]->init();
  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();
  }

  iv_addreason();

  lp_run();
  return (0);
}

/*----- That's all, folks -------------------------------------------------*/
Commit	Line	Data
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	*
11ad66c2 MW	12	* TrIPE is free software: you can redistribute it and/or modify it under
	13	* the terms of the GNU General Public License as published by the Free
	14	* Software Foundation; either version 3 of the License, or (at your
	15	* option) any later version.
e04c2d50	16	*
11ad66c2 MW	17	* TrIPE is distributed in the hope that it will be useful, but WITHOUT
	18	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	19	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	20	* for more details.
e04c2d50	21	*
410c8acf	22	* You should have received a copy of the GNU General Public License
11ad66c2	23	* along with TrIPE. If not, see <https://www.gnu.org/licenses/>.
410c8acf	24	*/
410c8acf	25
410c8acf	26	/----- Header files ------------------------------------------------------/
	27
	28	#include "tripe.h"
	29
	30	/----- Global variables --------------------------------------------------/
	31
	32	sel_state sel;
410c8acf	33
	34	/----- Static variables --------------------------------------------------/
	35
	36	static sel_timer it;
	37	#define T_INTERVAL MIN(1)
	38
a7abb429 MW	39	static unsigned iv_nreasons = 0;
	40	static struct timeval iv_next = { 0, 0 };
	41
	42	/----- The interval timer ------------------------------------------------/
410c8acf	43
	44	/* --- @interval@ --- *
	45	*
	46	* Arguments: @struct timeval *tv@ = time when called
	47	* @void *v@ = boring pointer
	48	*
	49	* Returns: ---
	50	*
	51	* Use: Called periodically to do housekeeping tasks.
	52	*/
	53
42da2a58	54	static void interval(struct timeval tv, void v)
410c8acf	55	{
410c8acf	56	T( trace(T_PEER, "peer: interval timer"); )
a7abb429	57	iv_next = *tv;
b5c45da1	58	rand_seed(RAND_GLOBAL, MAXHASHSZ);
410c8acf	59	p_interval();
a7abb429 MW	60	iv_next.tv_sec += T_INTERVAL;
	61	sel_addtimer(&sel, &it, &iv_next, interval, v);
	62	}
	63
	64	/* --- @iv_addreason@ --- *
	65	*
	66	* Arguments: ---
	67	*
	68	* Returns: ---
	69	*
	70	* Use: Adds an `interval timer reason'; if there are no others, the
	71	* interval timer is engaged.
	72	*/
	73
	74	void iv_addreason(void)
	75	{
	76	struct timeval tv;
	77
	78	if (!iv_nreasons) {
	79	gettimeofday(&tv, 0);
	80	if (TV_CMP(&tv, >=, &iv_next)) interval(&tv, 0);
	81	else sel_addtimer(&sel, &it, &iv_next, interval, 0);
	82	}
	83	iv_nreasons++;
410c8acf	84	}
410c8acf	85
a7abb429 MW	86	/* --- @iv_rmreason@ --- *
	87	*
	88	* Arguments: ---
	89	*
	90	* Returns: ---
	91	*
	92	* Use: Removes an interval timer reason; if there are none left, the
	93	* interval timer is disengaged.
	94	*/
	95
	96	void iv_rmreason(void)
	97	{
	98	assert(iv_nreasons); iv_nreasons--;
	99	if (!iv_nreasons) sel_rmtimer(&it);
	100	}
	101
c9aded9f MW	102	/----- The main loop -----------------------------------------------------/
	103
	104	/* --- @lp_init@ --- *
	105	*
	106	* Arguments: ---
	107	*
	108	* Returns: ---
	109	*
	110	* Use: Initializes the main loop. Most importantly, this sets up
	111	* the select multiplexor that everything else hooks onto.
	112	*/
	113
	114	void lp_init(void)
	115	{
	116	rand_noisesrc(RAND_GLOBAL, &noise_source);
	117	rand_seed(RAND_GLOBAL, MAXHASHSZ);
	118	gettimeofday(&iv_next, 0); iv_next.tv_sec += T_INTERVAL;
	119	signal(SIGPIPE, SIG_IGN);
	120	sel_init(&sel);
	121	sig_init(&sel);
	122	}
	123
	124	/* --- @lp_run@ --- *
	125	*
	126	* Arguments: ---
	127	*
	128	* Returns: Zero on successful termination; @-1@ if things went wrong.
	129	*
	130	* Use: Cranks the main loop until it should be cranked no more.
	131	*/
	132
	133	int lp_run(void)
	134	{
	135	int nerr = 0;
	136
	137	for (;;) {
	138	a_preselect();
	139	if (!sel_select(&sel)) nerr = 0;
	140	else if (errno != EINTR && errno != EAGAIN) {
	141	a_warn("SERVER", "select-error", "?ERRNO", A_END);
	142	nerr++;
	143	if (nerr > 8) {
	144	a_warn("ABORT", "repeated-select-errors", A_END);
	145	abort();
	146	}
	147	}
	148	}
	149	return (0);
	150	}
	151
a7abb429 MW	152	/----- Main code ---------------------------------------------------------/
a7abb429 MW	153
410c8acf	154	/* --- @main@ --- *
	155	*
	156	* Arguments: @int argc@ = number of command line arguments
	157	* @char *argv[]@ = vector of arguments
	158	*
	159	* Returns: Zero if OK, nonzero on error.
	160	*
	161	* Use: Main program. Provides a simple VPN.
	162	*/
	163
	164	static void usage(FILE *fp)
	165	{
46dde080	166	pquis(fp, "Usage: $ [-DF] [-d DIR] [-b ADDR] [-p PORT] [-n TUNNEL]\n\
a9279e37	167	[-U USER] [-G GROUP] [-a SOCKET] [-m MODE] [-T TRACE-OPTS]\n\
2d752320	168	[-k PRIV-KEYRING] [-K PUB-KEYRING] [-t KEY-TAG]\n");
410c8acf	169	}
410c8acf	170
f98df549	171	static void version(FILE *fp) { pquis(fp, "$, version " VERSION "\n"); }
410c8acf	172
	173	static void help(FILE *fp)
	174	{
	175	version(fp);
	176	fputc('\n', fp);
	177	usage(fp);
	178	fputs("\n\
	179	Options:\n\
	180	\n\
	181	-h, --help Display this help text.\n\
	182	-v, --version Display version number.\n\
	183	-u, --usage Display pointless usage message.\n\
42da2a58	184	--tunnels Display IP tunnel drivers and exit.\n\
410c8acf	185	\n\
47828bd9 MW	186	-4, --ipv4 Transport over IPv4 only.\n\
47828bd9 MW	187	-6, --ipv6 Transport over IPv6 only.\n\
410c8acf	188	-D, --daemon Run in the background.\n\
46dde080	189	-F, --foreground Quit when stdin reports end-of-file.\n\
ef4a1ab7	190	-d, --directory=DIR Switch to directory DIR [default " CONFIGDIR "].\n\
d13e5724	191	-b, --bind-address=ADDR Bind UDP socket to this IP ADDR.\n\
165efde7 MW	192	-p, --port=PORT Select UDP port to listen to "
165efde7 MW	193	"[default " STR(TRIPE_PORT) "].\n\
42da2a58	194	-n, --tunnel=TUNNEL Seelect default tunnel driver.\n\
d13e5724	195	-U, --setuid=USER Set uid to USER after initialization.\n\
d13e5724	196	-G, --setgid=GROUP Set gid to GROUP after initialization.\n\
410c8acf	197	-k, --priv-keyring=FILE Get private key from FILE.\n\
	198	-K, --pub-keyring=FILE Get public keys from FILE.\n\
	199	-t, --tag=KEYTAG Use private key labelled TAG.\n\
	200	-a, --admin-socket=FILE Use FILE as the adminstration socket.\n\
a9279e37	201	-m, --admin-perms=MODE Permissions to set on admin socket [default 600].\n\
c5a2ea9b	202	" T( "\
410c8acf	203	-T, --trace=OPTIONS Turn on tracing options.\n\
c5a2ea9b	204	" ) "\
410c8acf	205	", fp);
	206	}
	207
	208	int main(int argc, char *argv[])
	209	{
	210	const char kr_priv = "keyring", kr_pub = "keyring.pub";
fc5f4823	211	const char *tag_priv = 0;
ef4a1ab7	212	const char *csock = SOCKETDIR "/tripesock";
a9279e37	213	int csockmode = 0600;
ef4a1ab7	214	const char *dir = CONFIGDIR;
410c8acf	215	const char *p;
89640f3f MW	216	const char bindhost = 0, bindsvc = STR(TRIPE_PORT);
89640f3f MW	217	struct addrinfo aihint = { 0 }, *ailist;
410c8acf	218	unsigned f = 0;
42da2a58	219	int i;
c9aded9f	220	int err;
46dde080	221	unsigned af;
410c8acf	222	uid_t u = -1;
	223	gid_t g = -1;
	224
	225	#define f_bogus 1u
	226	#define f_daemon 2u
46dde080	227	#define f_foreground 4u
410c8acf	228
410c8acf	229	ego(argv[0]);
d360f042	230	T( trace_on(stderr, 0); )
410c8acf	231
	232	if ((p = getenv("TRIPEDIR")) != 0)
	233	dir = p;
797cf76b MW	234	if ((p = getenv("TRIPESOCK")) != 0)
797cf76b MW	235	csock = p;
42da2a58	236	tun_default = tunnels[0];
47828bd9	237	aihint.ai_family = AF_UNSPEC;
410c8acf	238
	239	for (;;) {
	240	static const struct option opts[] = {
	241	{ "help", 0, 0, 'h' },
	242	{ "version", 0, 0, 'v' },
	243	{ "usage", 0, 0, 'u' },
42da2a58	244	{ "tunnels", 0, 0, '0' },
410c8acf	245
47828bd9 MW	246	{ "ipv4", 0, 0, '4' },
47828bd9 MW	247	{ "ipv6", 0, 0, '6' },
410c8acf	248	{ "daemon", 0, 0, 'D' },
46dde080	249	{ "foreground", 0, 0, 'F' },
410c8acf	250	{ "uid", OPTF_ARGREQ, 0, 'U' },
	251	{ "setuid", OPTF_ARGREQ, 0, 'U' },
	252	{ "gid", OPTF_ARGREQ, 0, 'G' },
	253	{ "setgid", OPTF_ARGREQ, 0, 'G' },
767b36e2	254	{ "bind-address", OPTF_ARGREQ, 0, 'b' },
42da2a58	255	{ "tunnel", OPTF_ARGREQ, 0, 'n' },
410c8acf	256	{ "port", OPTF_ARGREQ, 0, 'p' },
	257	{ "directory", OPTF_ARGREQ, 0, 'd' },
	258	{ "priv-keyring", OPTF_ARGREQ, 0, 'k' },
	259	{ "pub-keyring", OPTF_ARGREQ, 0, 'K' },
	260	{ "tag", OPTF_ARGREQ, 0, 't' },
	261	{ "admin-socket", OPTF_ARGREQ, 0, 'a' },
a9279e37	262	{ "admin-perms", OPTF_ARGREQ, 0, 'm' },
410c8acf	263	#ifndef NTRACE
	264	{ "trace", OPTF_ARGREQ, 0, 'T' },
	265	#endif
	266
	267	{ 0, 0, 0, 0 }
	268	};
	269
47828bd9	270	i = mdwopt(argc, argv, "hvu46DFU:G:b:n:p:d:k:K:t:a:m:" T("T:"),
42da2a58	271	opts, 0, 0, 0);
410c8acf	272	if (i < 0)
	273	break;
	274	switch (i) {
	275	case 'h':
	276	help(stdout);
	277	exit(0);
	278	case 'v':
	279	version(stdout);
	280	exit(0);
	281	case 'u':
	282	usage(stdout);
	283	exit(0);
	284
47828bd9 MW	285	case '4':
	286	aihint.ai_family = AF_INET;
	287	break;
	288	case '6':
	289	aihint.ai_family = AF_INET6;
	290	break;
410c8acf	291	case 'D':
	292	f \|= f_daemon;
	293	break;
52b86648 MW	294	case 'U':
	295	u = u_getuser(optarg, &g);
	296	break;
	297	case 'G':
	298	g = u_getgroup(optarg);
	299	break;
46dde080 MW	300	case 'F':
	301	f \|= f_foreground;
	302	break;
767b36e2	303
89640f3f MW	304	case 'b':
	305	bindhost = optarg;
	306	break;
	307	case 'p':
	308	bindsvc = optarg;
	309	break;
42da2a58	310	case 'n': {
	311	int i;
	312	for (i = 0;; i++) {
	313	if (!tunnels[i])
	314	die(EXIT_FAILURE, "unknown tunnel `%s'", optarg);
	315	if (mystrieq(optarg, tunnels[i]->name))
	316	break;
	317	}
	318	tun_default = tunnels[i];
	319	} break;
410c8acf	320	case 'd':
	321	dir = optarg;
	322	break;
	323	case 'k':
	324	kr_priv = optarg;
	325	break;
	326	case 'K':
	327	kr_pub = optarg;
	328	break;
	329	case 'a':
	330	csock = optarg;
	331	break;
a9279e37 MW	332	case 'm': {
	333	char *p;
	334	csockmode = strtol(optarg, &p, 8);
	335	if (*p) die(EXIT_FAILURE, "bad permissions: `%s'", optarg);
	336	} break;
410c8acf	337	case 't':
	338	tag_priv = optarg;
	339	break;
	340	#ifndef NTRACE
	341	case 'T':
	342	tr_flags = traceopt(tr_opts, optarg, tr_flags, 0);
	343	trace_level(tr_flags);
	344	break;
	345	#endif
ef4a1ab7	346	case '0': {
42da2a58	347	int i;
	348	for (i = 0; tunnels[i]; i++)
	349	puts(tunnels[i]->name);
ef4a1ab7	350	exit(0);
ef4a1ab7	351	} break;
410c8acf	352	default:
	353	f \|= f_bogus;
	354	break;
	355	}
	356	}
	357
	358	if (optind < argc \|\| (f & f_bogus)) {
	359	usage(stderr);
	360	exit(EXIT_FAILURE);
	361	}
46dde080 MW	362	if (!(~f & (f_daemon \| f_foreground)))
46dde080 MW	363	die(EXIT_FAILURE, "foreground operation for a daemon is silly");
410c8acf	364
89640f3f MW	365	aihint.ai_protocol = IPPROTO_UDP;
	366	aihint.ai_socktype = SOCK_DGRAM;
	367	aihint.ai_flags = AI_PASSIVE \| AI_ADDRCONFIG;
	368	if ((err = getaddrinfo(bindhost, bindsvc, &aihint, &ailist)) != 0) {
	369	die(EXIT_FAILURE, "couldn't resolve hostname %c%s%c, port `%s': %s",
	370	bindhost ? '`' : '<',
	371	bindhost ? bindhost : "nil",
	372	bindhost ? '\'' : '>',
	373	bindsvc, gai_strerror(err));
	374	}
	375
410c8acf	376	if (chdir(dir)) {
	377	die(EXIT_FAILURE, "can't set current directory to `%s': %s",
	378	dir, strerror(errno));
	379	}
	380
c9aded9f	381	lp_init();
acd781a8	382
3cdc3f3a	383	if (!(f & f_daemon)) {
46dde080	384	af = AF_WARN;
3cdc3f3a	385	#ifndef NTRACE
46dde080	386	af \|= AF_TRACE;
3cdc3f3a	387	#endif
46dde080 MW	388	if (f & f_foreground)
	389	af \|= AF_FOREGROUND;
	390	a_create(STDIN_FILENO, STDOUT_FILENO, af);
a47e5f92	391	a_switcherr();
3cdc3f3a	392	}
97d410cd	393
acd781a8 MW	394	p_init();
	395	for (i = 0; tunnels[i]; i++)
	396	tunnels[i]->init();
	397	p_bind(ailist); freeaddrinfo(ailist);
	398
97d410cd MW	399	for (i = 0; tunnels[i]; i++) {
	400	if (tunnels[i]->flags&TUNF_PRIVOPEN) {
	401	ps_split(f & f_daemon);
	402	break;
	403	}
	404	}
	405
7737eb87 MW	406	a_init();
	407	a_signals();
	408	a_listen(csock, u, g, csockmode);
52b86648	409	u_setugid(u, g);
410c8acf	410	km_init(kr_priv, kr_pub, tag_priv);
8362ac1c	411	kx_init();
410c8acf	412	if (f & f_daemon) {
5ae728a6 MW	413	if (daemonize()) {
	414	a_warn("SERVER", "daemon-error", "?ERRNO", A_END);
	415	exit(EXIT_FAILURE);
	416	}
410c8acf	417	a_daemon();
a47e5f92	418	a_switcherr();
410c8acf	419	}
410c8acf	420
a7abb429	421	iv_addreason();
410c8acf	422
c9aded9f	423	lp_run();
410c8acf	424	return (0);
	425	}
	426
	427	/----- That's all, folks -------------------------------------------------/