5 * Admin interface for configuration
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Trivial IP Encryption (TrIPE).
14 * TrIPE is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * TrIPE is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with TrIPE; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Header files ------------------------------------------------------*/
33 /*----- Global variables --------------------------------------------------*/
37 const trace_opt tr_opts[] = {
38 { 't', T_TUNNEL, "tunnel events" },
39 { 'r', T_PEER, "peer events" },
40 { 'a', T_ADMIN, "admin interface" },
41 { 'p', T_PACKET, "packet contents" },
42 { 'c', T_CRYPTO, "crypto details" },
43 { 's', T_KEYSET, "symmetric keyset management" },
44 { 'x', T_KEYEXCH, "key exchange" },
45 { 'm', T_KEYMGMT, "key management" },
46 { 'A', T_ALL, "all of the above" },
50 unsigned tr_flags = 0;
53 static const trace_opt w_opts[] = {
54 { 't', AF_TRACE, "trace messages" },
55 { 'n', AF_NOTE, "asynchronous notifications" },
56 { 'w', AF_WARN, "warnings" },
57 { 'A', AF_ALLMSGS, "all of the above" },
61 /*----- Static variables --------------------------------------------------*/
65 static const char *sockname;
66 static unsigned flags = 0;
67 static admin *a_stdin = 0;
68 static sig s_term, s_int, s_hup;
73 #define T_RESOLVE SEC(30)
76 static void a_destroy(admin */*a*/);
77 static void a_lock(admin */*a*/);
78 static void a_unlock(admin */*a*/);
80 /*----- Output functions --------------------------------------------------*/
82 /* --- @trywrite@ --- *
84 * Arguments: @admin *a@ = pointer to an admin block
85 * @const char *p@ = pointer to buffer to write
86 * @size_t sz@ = size of data to write
88 * Returns: The number of bytes written, or less than zero on error.
90 * Use: Attempts to write data to a client.
93 static ssize_t trywrite(admin *a, const char *p, size_t sz)
100 n = write(a->w.fd, p, sz);
110 if (errno != EAGAIN && errno != EWOULDBLOCK) {
112 a_warn("ADMIN client-read-error -- %s", strerror(errno));
119 /* --- @dosend@ --- *
121 * Arguemnts: @admin *a@ = pointer to an admin block
122 * @const char *p@ = pointer to buffer to write
123 * @size_t sz@ = size of data to write
127 * Use: Sends data to an admin client.
130 static void dosend(admin *a, const char *p, size_t sz)
138 /* --- Try to send the data immediately --- */
141 if ((n = trywrite(a, p, sz)) < 0)
149 /* --- Fill buffers with the data until it's all gone --- */
154 else if (o->p_in < o->buf + OBUFSZ)
158 o = xmalloc(sizeof(obuf));
160 o->p_in = o->p_out = o->buf;
168 n = o->buf + OBUFSZ - o->p_in;
171 memcpy(o->p_in, p, n);
178 /* --- @a_flush@ --- *
180 * Arguments: @int fd@ = file descriptor
181 * @unsigned mode@ = what's happening
182 * @void *v@ = pointer to my admin block
186 * Use: Flushes buffers when a client is ready to read again.
189 static void a_flush(int fd, unsigned mode, void *v)
197 if ((n = trywrite(a, o->p_out, o->p_in - o->p_out)) < 0)
200 if (o->p_in < o->p_out)
213 /*----- Utility functions -------------------------------------------------*/
215 /* --- @a_write@, @a_vwrite@ --- *
217 * Arguments: @admin *a@ = admin connection to write to
218 * @const char *tag@ = tag prefix string, or null
219 * @const char *fmt@ = pointer to format string
220 * @va_list ap@ = arguments in list
221 * @...@ = other arguments
225 * Use: Sends a message to an admin connection.
228 static void a_vwrite(admin *a, const char *tag, const char *fmt, va_list ap)
237 dstr_vputf(&d, fmt, &ap);
239 dosend(a, d.buf, d.len);
243 static void a_write(admin *a, const char *tag, const char *fmt, ...)
247 a_vwrite(a, tag, fmt, ap);
251 /* --- @a_ok@, @a_info@, @a_fail@ --- *
253 * Arguments: @admin *a@ = connection
254 * @const char *fmt@ = format string
255 * @...@ = other arguments
259 * Use: Convenience functions for @a_write@.
262 static void a_ok(admin *a) { a_write(a, "OK", 0); }
264 static void a_info(admin *a, const char *fmt, ...)
268 a_vwrite(a, "INFO", fmt, ap);
272 static void a_fail(admin *a, const char *fmt, ...)
276 a_vwrite(a, "FAIL", fmt, ap);
280 /* --- @a_alert@, @a_valert@, @a_rawalert@ --- *
282 * Arguments: @unsigned f_and, f_eq@ = filter for connections
283 * @const char *tag@ = tag prefix string
284 * @const char *fmt@ = pointer to format string
285 @ @const char *p@ = pointer to raw string
286 * @size_t sz@ = size of raw string
287 * @va_list ap@ = arguments in list
288 * @...@ = other arguments
292 * Use: Write a message to all admin connections matched by the given
296 static void a_rawalert(unsigned f_and, unsigned f_eq, const char *tag,
297 const char *p, size_t sz)
302 if (!(flags & F_INIT))
310 dstr_putm(&d, p, sz);
314 for (a = admins; a; a = aa) {
316 if ((a->f & f_and) == f_eq)
317 dosend(a, d.buf, d.len);
322 static void a_valert(unsigned f_and, unsigned f_eq, const char *tag,
323 const char *fmt, va_list ap)
327 if (!(flags & F_INIT))
330 dstr_vputf(&d, fmt, &ap);
331 a_rawalert(f_and, f_eq, tag, fmt ? d.buf : 0, fmt ? d.len : 0);
336 static void a_alert(unsigned f_and, unsigned f_eq, const char *tag,
337 const char *fmt, ...)
341 a_valert(f_and, f_eq, tag, fmt, ap);
346 /* --- @a_warn@ --- *
348 * Arguments: @const char *fmt@ = pointer to format string
349 * @...@ = other arguments
353 * Use: Informs all admin connections of a warning.
356 void a_warn(const char *fmt, ...)
362 a_valert(0, 0, "WARN", fmt, ap);
364 fprintf(stderr, "%s: ", QUIS);
365 vfprintf(stderr, fmt, ap);
371 /* --- @a_trace@ --- *
373 * Arguments: @const char *p@ = pointer to a buffer
374 * @size_t sz@ = size of the buffer
375 * @void *v@ = uninteresting pointer
379 * Use: Custom trace output handler. Sends trace messages to
380 * interested admin connections.
384 static void a_trace(const char *p, size_t sz, void *v)
386 a_rawalert(AF_TRACE, AF_TRACE, "TRACE", p, sz);
390 /* --- @a_notify@ --- *
392 * Arguments: @const char *fmt@ = pointer to format string
393 * @...@ = other arguments
397 * Use: Sends a notification to interested admin connections.
400 void a_notify(const char *fmt, ...)
405 a_valert(AF_NOTE, AF_NOTE, "NOTE", fmt, ap);
409 /* --- @a_quit@ --- *
415 * Use: Shuts things down nicely.
422 while ((p = p_first()) != 0)
429 /* --- @a_sigdie@ --- *
431 * Arguments: @int sig@ = signal number
432 * @void *v@ = an uninteresting argument
436 * Use Shuts down on receipt of a fatal signal.
439 static void a_sigdie(int sig, void *v)
445 case SIGTERM: p = "SIGTERM"; break;
446 case SIGINT: p = "SIGINT"; break;
448 sprintf(buf, "%i", sig);
452 a_warn("SERVER quit signal %s", p);
456 /* --- @a_sighup@ --- *
458 * Arguments: @int sig@ = signal number
459 * @void *v@ = an uninteresting argument
463 * Use Logs a message about SIGHUP not being useful.
466 static void a_sighup(int sig, void *v)
468 a_warn("SERVER ignore signal SIGHUP");
471 /* --- @a_parsetime@ --- *
473 * Arguments; @const char *p@ = time string to parse
475 * Returns: Time in seconds, or @< 0@ on error.
478 static long a_parsetime(const char *p)
481 long t = strtol(p, &q, 0);
487 case 's': if (q[1] != 0)
494 /*----- Adding peers ------------------------------------------------------*/
496 /* --- @a_resolve@ --- *
498 * Arguments: @struct hostent *h@ = pointer to resolved hostname
499 * @void *v@ = pointer to admin block
503 * Use: Handles a completed name resolution.
506 static void a_resolve(struct hostent *h, void *v)
511 T( trace(T_ADMIN, "admin: %u resolved", a->seq); )
515 a_fail(a, "resolve-error %s", a->paddr);
516 else if (p_find(a->peer.name))
517 a_fail(a, "peer-exists %s", a->peer.name);
519 memcpy(&a->peer.sa.sin.sin_addr, h->h_addr, sizeof(struct in_addr));
520 if (!p_create(&a->peer))
521 a_fail(a, "peer-create-fail %s", a->peer.name);
528 selbuf_enable(&a->b);
532 /* --- @a_timer@ --- *
534 * Arguments: @struct timeval *tv@ = timer
535 * @void *v@ = pointer to admin block
539 * Use: Times out a resolver.
542 static void a_timer(struct timeval *tv, void *v)
547 T( trace(T_ADMIN, "admin: %u resolver timeout", a->seq); )
549 a_fail(a, "resolver-timeout %s\n", a->paddr);
553 selbuf_enable(&a->b);
557 /* --- @acmd_add@ --- *
559 * Arguments: @admin *a@ = connection which requested the addition
560 * @unsigned ac@ = argument count
561 * @char *av[]@ = pointer to the argument list
565 * Use: Adds a new peer.
568 static void acmd_add(admin *a, unsigned ac, char *av[])
575 /* --- Make sure someone's not got there already --- */
578 a_fail(a, "peer-exists %s", av[0]);
582 /* --- Set stuff up --- */
584 a->peer.name = av[0];
586 a->peer.tops = tun_default;
588 /* --- Parse options --- */
594 if (mystrieq(av[i], "-tunnel")) {
595 if (!av[++i]) goto bad_syntax;
598 a_fail(a, "unknown-tunnel %s", av[i]);
601 if (mystrieq(av[i], tunnels[j]->name)) {
602 a->peer.tops = tunnels[j];
606 } else if (mystrieq(av[i], "-keepalive")) {
608 if (!av[++i]) goto bad_syntax;
609 if ((t = a_parsetime(av[i])) < 0) {
610 a_fail(a, "bad-time-spec %s", av[i]);
614 } else if (mystrieq(av[i], "--")) {
622 /* --- Fill in the easy bits of address --- */
624 if (mystrieq(av[i], "inet")) i++;
626 a_fail(a, "bad-syntax -- add PEER [OPTIONS] [inet] ADDRESS PORT");
629 a->peer.sa.sin.sin_family = AF_INET;
630 a->peer.sasz = sizeof(a->peer.sa.sin);
631 pt = strtoul(av[i + 1], &p, 0);
633 struct servent *s = getservbyname(av[i + 1], "udp");
635 a_fail(a, "unknown-service %s", av[i + 1]);
638 pt = ntohs(s->s_port);
640 if (pt == 0 || pt >= 65536) {
641 a_fail(a, "invalid-port %lu", pt);
644 a->peer.sa.sin.sin_port = htons(pt);
646 /* --- If the name is numeric, do it the easy way --- */
648 if (inet_aton(av[i], &a->peer.sa.sin.sin_addr)) {
649 if (!p_create(&a->peer))
650 a_fail(a, "peer-create-fail %s", av[0]);
657 /* --- Store everything for later and crank up the resolver --- *
659 * We disable the line buffer until the resolver completes (or times out).
660 * This prevents other commands on the same connection (though the rest of
661 * the system continues regardless), but makes life simpler for the client.
664 a->peer.name = xstrdup(av[0]);
665 a->paddr = xstrdup(av[i]);
666 selbuf_disable(&a->b);
667 gettimeofday(&tv, 0);
668 tv.tv_sec += T_RESOLVE;
669 sel_addtimer(&sel, &a->t, &tv, a_timer, a);
670 bres_byname(&a->r, a->paddr, a_resolve, a);
671 T( trace(T_ADMIN, "admin: %u resolving hostname `%s'",
676 a_fail(a, "bad-syntax -- add PEER [OPTIONS] ADDR ...");
680 /*----- Ping --------------------------------------------------------------*/
682 /* --- @a_pong@ --- *
684 * Arguments: @int rc@ = return code
685 * @void *av@ = admin connection which requested the ping
689 * Use: Collects what happened to a ping message.
692 static void a_pong(int rc, void *av)
701 gettimeofday(&tv, 0);
702 tv_sub(&tv, &tv, &a->pingtime);
703 millis = (double)tv.tv_sec * 1000 + (double)tv.tv_usec/1000;
704 a_info(a, "ping-ok %.1f", millis);
708 a_info(a, "ping-timeout");
712 a_info(a, "ping-peer-died");
721 /* --- @acmd_ping@, @acmd_eping@ --- *
723 * Arguments: @admin *a@ = connection which requested the ping
724 * @unsigned ac@ = argument count
725 * @char *av[]@ = pointer to the argument list
732 static void a_ping(admin *a, unsigned ac, char *av[],
733 const char *cmd, unsigned msg)
743 if (mystrieq(av[i], "-timeout")) {
744 if (!av[++i]) goto bad_syntax;
745 if ((t = a_parsetime(av[i])) < 0) {
746 a_fail(a, "bad-time-spec %s", av[i]);
749 } else if (mystrieq(av[i], "--")) {
757 if (!av[i]) goto bad_syntax;
758 if ((p = p_find(av[i])) == 0) {
759 a_fail(a, "unknown-peer %s", av[i]);
762 gettimeofday(&a->pingtime, 0);
763 if (p_pingsend(p, &a->ping, msg, t, a_pong, a))
764 a_fail(a, "ping-send-failed");
768 a_fail(a, "bad-syntax -- %s [OPTIONS] PEER", cmd);
772 static void acmd_ping(admin *a, unsigned ac, char *av[])
773 { a_ping(a, ac, av, "ping", MISC_PING); }
774 static void acmd_eping(admin *a, unsigned ac, char *av[])
775 { a_ping(a, ac, av, "eping", MISC_EPING); }
778 /*----- Administration commands -------------------------------------------*/
780 /* --- Miscellaneous commands --- */
782 /* --- @traceish@ --- *
784 * Arguments: @admin *a@ = connection to complain on
785 * @unsigned ac@ = number of arguments
786 * @char *av[]@ = vector of arguments
787 * @const char *what@ = what we're messing with
788 * @const trace_opt *tt@ = options table
789 * @unsigned *ff@ = where the flags are
791 * Returns: Nonzero if anything changed.
793 * Use: Guts of trace-ish commands like `trace' and `watch'.
796 static int traceish(admin *a, unsigned ac, char *av[],
797 const char *what, const trace_opt *tt, unsigned *ff)
801 if (!ac || strcmp(av[0], "?") == 0) {
803 a_info(a, "Current %s status:", what);
804 for (t = tt; t->ch; t++) {
805 a_info(a, "%c %c %s",
806 t->ch, (*ff & t->f) == t->f ? '*' : ' ', t->help);
816 case '+': sense = 1; break;
817 case '-': sense = 0; break;
819 for (t = tt; t->ch; t++) {
821 if (sense) f |= t->f;
826 a_fail(a, "bad-%s-option %c", what, *p);
842 static void acmd_trace(admin *a, unsigned ac, char *av[])
844 if (traceish(a, ac, av, "trace", tr_opts, &tr_flags))
845 trace_level(tr_flags);
850 static void acmd_watch(admin *a, unsigned ac, char *av[])
852 traceish(a, ac, av, "watch", w_opts, &a->f);
855 static void quotify(dstr *d, const char *p)
859 if (*p && !p[strcspn(p, "\"' \t\n\v")])
864 if (*p == '\\' || *p == '\"')
872 static void alertcmd(admin *a, unsigned f_and, unsigned f_eq,
873 const char *tag, unsigned ac, char *av[])
878 dstr_puts(&d, "USER");
879 for (i = 0; i < ac; i++)
882 a_rawalert(f_and, f_eq, tag, d.buf, d.len);
887 static void acmd_notify(admin *a, unsigned ac, char *av[])
888 { alertcmd(a, AF_NOTE, AF_NOTE, "NOTE", ac, av); }
889 static void acmd_warn(admin *a, unsigned ac, char *av[])
890 { alertcmd(a, AF_WARN, AF_WARN, "WARN", ac, av); }
892 static void acmd_port(admin *a, unsigned ac, char *av[])
894 a_info(a, "%u", p_port());
898 static void acmd_daemon(admin *a, unsigned ac, char *av[])
900 if (flags & F_DAEMON)
901 a_fail(a, "already-daemon");
907 a_fail(a, "daemon-error -- %s", strerror(errno));
915 static void acmd_list(admin *a, unsigned ac, char *av[])
918 for (p = p_first(); p; p = p_next(p))
919 a_info(a, "%s", p_name(p));
923 static void acmd_ifname(admin *a, unsigned ac, char *av[])
927 if ((p = p_find(av[0])) == 0)
928 a_fail(a, "unknown-peer %s", av[0]);
930 a_info(a, "%s", p_ifname(p));
935 static void acmd_addr(admin *a, unsigned ac, char *av[])
940 if ((p = p_find(av[0])) == 0)
941 a_fail(a, "unknown-peer %s", av[0]);
944 assert(ad->sa.sa_family == AF_INET);
945 a_info(a, "INET %s %u",
946 inet_ntoa(ad->sin.sin_addr),
947 (unsigned)ntohs(ad->sin.sin_port));
952 static void acmd_stats(admin *a, unsigned ac, char *av[])
957 if ((p = p_find(av[0])) == 0)
958 a_fail(a, "unknown-peer %s", av[0]);
961 a_info(a, "start-time=%s", timestr(st->t_start));
962 a_info(a, "last-packet-time=%s", timestr(st->t_last));
963 a_info(a, "last-keyexch-time=%s", timestr(st->t_kx));
964 a_info(a, "packets-in=%lu bytes-in=%lu", st->n_in, st->sz_in);
965 a_info(a, "packets-out=%lu bytes-out=%lu",
966 st->n_out, st->sz_out);
967 a_info(a, "keyexch-packets-in=%lu keyexch-bytes-in=%lu",
968 st->n_kxin, st->sz_kxin);
969 a_info(a, "keyexch-packets-out=%lu keyexch-bytes-out=%lu",
970 st->n_kxout, st->sz_kxout);
971 a_info(a, "ip-packets-in=%lu ip-bytes-in=%lu",
972 st->n_ipin, st->sz_ipin);
973 a_info(a, "ip-packets-out=%lu ip-bytes-out=%lu",
974 st->n_ipout, st->sz_ipout);
975 a_info(a, "rejected-packets=%lu", st->n_reject);
980 static void acmd_kill(admin *a, unsigned ac, char *av[])
983 if ((p = p_find(av[0])) == 0)
984 a_fail(a, "unknown-peer %s", av[0]);
991 static void acmd_forcekx(admin *a, unsigned ac, char *av[])
994 if ((p = p_find(av[0])) == 0)
995 a_fail(a, "unknown-peer %s", av[0]);
1002 static void acmd_quit(admin *a, unsigned ac, char *av[])
1004 a_warn("SERVER quit admin-request");
1009 static void acmd_version(admin *a, unsigned ac, char *av[])
1011 a_info(a, "%s %s", PACKAGE, VERSION);
1015 static void acmd_tunnels(admin *a, unsigned ac, char *av[])
1018 for (i = 0; tunnels[i]; i++)
1019 a_info(a, "%s", tunnels[i]->name);
1023 /* --- The command table and help --- */
1025 typedef struct acmd {
1028 unsigned argmin, argmax;
1029 void (*func)(admin */*a*/, unsigned /*ac*/, char */*av*/[]);
1032 static void acmd_help(admin */*a*/, unsigned /*ac*/, char */*av*/[]);
1034 static const acmd acmdtab[] = {
1035 { "help", "help", 0, 0, acmd_help },
1036 { "version", "version", 0, 0, acmd_version },
1038 { "trace", "trace [OPTIONS]", 0, 1, acmd_trace },
1040 { "watch", "watch [OPTIONS]", 0, 1, acmd_watch },
1041 { "notify", "notify MESSAGE ...", 1, 0xffff, acmd_notify },
1042 { "warn", "warn MESSAGE ...", 1, 0xffff, acmd_warn },
1043 { "port", "port", 0, 0, acmd_port },
1044 { "daemon", "daemon", 0, 0, acmd_daemon },
1045 { "list", "list", 0, 0, acmd_list },
1046 { "ifname", "ifname PEER", 1, 1, acmd_ifname },
1047 { "addr", "addr PEER", 1, 1, acmd_addr },
1048 { "stats", "stats PEER", 1, 1, acmd_stats },
1049 { "ping", "ping [OPTIONS] PEER", 1, 0xffff, acmd_ping },
1050 { "eping", "eping [OPTIONS] PEER", 1, 0xffff, acmd_eping },
1051 { "kill", "kill PEER", 1, 1, acmd_kill },
1052 { "forcekx", "forcekx PEER", 1, 1, acmd_forcekx },
1053 { "add", "add PEER [OPTIONS] ADDR ...",
1054 2, 0xffff, acmd_add },
1055 { "tunnels", "tunnels", 0, 0, acmd_tunnels },
1056 { "quit", "quit", 0, 0, acmd_quit },
1060 static void acmd_help(admin *a, unsigned ac, char *av[])
1063 for (c = acmdtab; c->name; c++)
1064 a_info(a, "%s", c->help);
1068 /*----- Connection handling -----------------------------------------------*/
1070 /* --- @a_lock@ --- *
1072 * Arguments: @admin *a@ = pointer to an admin block
1076 * Use: Locks an admin block so that it won't be destroyed
1080 static void a_lock(admin *a) { assert(!(a->f & AF_LOCK)); a->f |= AF_LOCK; }
1082 /* --- @a_unlock@ --- *
1084 * Arguments: @admin *a@ = pointer to an admin block
1088 * Use: Unlocks an admin block, allowing its destruction. This is
1089 * also the second half of @a_destroy@.
1092 static void a_unlock(admin *a)
1094 assert(a->f & AF_LOCK);
1095 if (!(a->f & AF_DEAD)) {
1100 T( trace(T_ADMIN, "admin: completing destruction of connection %u",
1103 selbuf_destroy(&a->b);
1105 xfree(a->peer.name);
1111 p_pingdone(&a->ping, PING_NONOTIFY);
1112 if (a->b.reader.fd != a->w.fd)
1113 close(a->b.reader.fd);
1119 a->next->prev = a->prev;
1121 a->prev->next = a->next;
1127 /* --- @a_destroy@ --- *
1129 * Arguments: @admin *a@ = pointer to an admin block
1133 * Use: Destroys an admin block. This requires a certain amount of
1137 static void a_destroy(admin *a)
1139 /* --- Don't multiply destroy admin blocks --- */
1144 /* --- Make sure nobody expects it to work --- */
1147 T( trace(T_ADMIN, "admin: destroying connection %u", a->seq); )
1149 /* --- Free the output buffers --- */
1154 for (o = a->o_head; o; o = oo) {
1161 /* --- If the block is locked, that's all we can manage --- */
1163 if (a->f & AF_LOCK) {
1164 T( trace(T_ADMIN, "admin: deferring destruction..."); )
1171 /* --- @a_line@ --- *
1173 * Arguments: @char *p@ = pointer to the line read
1174 * @size_t len@ = length of the line
1175 * @void *vp@ = pointer to my admin block
1179 * Use: Handles a line of input.
1182 static void a_line(char *p, size_t len, void *vp)
1196 ac = str_qsplit(p, av, 16, 0, STRF_QUOTE);
1199 for (c = acmdtab; c->name; c++) {
1200 if (mystrieq(av[0], c->name)) {
1202 if (c->argmin > ac || ac > c->argmax)
1203 a_fail(a, "bad-syntax -- %s", c->help);
1206 c->func(a, ac, av + 1);
1212 a_fail(a, "unknown-command %s", av[0]);
1215 /* --- @a_create@ --- *
1217 * Arguments: @int fd_in, fd_out@ = file descriptors to use
1218 * @unsigned f@ = initial flags to set
1222 * Use: Creates a new admin connection.
1225 void a_create(int fd_in, int fd_out, unsigned f)
1227 admin *a = CREATE(admin);
1229 T( static unsigned seq = 0;
1231 T( trace(T_ADMIN, "admin: accepted connection %u", a->seq); )
1235 if (fd_in == STDIN_FILENO)
1237 fdflags(fd_in, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
1238 if (fd_out != fd_in)
1239 fdflags(fd_out, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
1240 selbuf_init(&a->b, &sel, fd_in, a_line, a);
1241 sel_initfile(&sel, &a->w, fd_out, SEL_WRITE, a_flush, a);
1251 /* --- @a_accept@ --- *
1253 * Arguments: @int fd@ = file descriptor to accept
1254 * @unsigned mode@ = what to do
1255 * @void *v@ = uninteresting pointer
1259 * Use: Accepts a new admin connection.
1262 static void a_accept(int fd, unsigned mode, void *v)
1265 struct sockaddr_un sun;
1266 size_t sz = sizeof(sun);
1268 if ((nfd = accept(fd, (struct sockaddr *)&sun, &sz)) < 0) {
1269 if (errno != EINTR && errno != EAGAIN && errno != EWOULDBLOCK &&
1270 errno != ECONNABORTED && errno != EPROTO)
1271 a_warn("ADMIN accept-error -- %s", strerror(errno));
1274 a_create(nfd, nfd, 0);
1277 /* --- @a_daemon@ --- *
1283 * Use: Informs the admin module that it's a daemon.
1291 /* --- @a_init@ --- *
1293 * Arguments: @const char *name@ = socket name to create
1297 * Use: Creates the admin listening socket.
1300 void a_init(const char *name)
1304 struct sockaddr_un sun;
1305 struct sigaction sa;
1308 /* --- Set up the socket address --- */
1310 sz = strlen(name) + 1;
1311 if (sz > sizeof(sun.sun_path))
1312 die(EXIT_FAILURE, "socket name `%s' too long", name);
1314 sun.sun_family = AF_UNIX;
1315 memcpy(sun.sun_path, name, sz);
1316 sz += offsetof(struct sockaddr_un, sun_path);
1318 /* --- Attempt to bind to the socket --- */
1322 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
1323 die(EXIT_FAILURE, "couldn't create socket: %s", strerror(errno));
1324 if (bind(fd, (struct sockaddr *)&sun, sz) < 0) {
1327 if (errno != EADDRINUSE) {
1328 die(EXIT_FAILURE, "couldn't bind to address `%s': %s",
1329 sun.sun_path, strerror(e));
1332 die(EXIT_FAILURE, "too many retries; giving up");
1334 if (!connect(fd, (struct sockaddr *)&sun, sz)) {
1335 die(EXIT_FAILURE, "server already listening on admin socket `%s'",
1338 if (errno != ECONNREFUSED)
1339 die(EXIT_FAILURE, "couldn't bind to address: %s", strerror(e));
1340 if (stat(sun.sun_path, &st)) {
1341 die(EXIT_FAILURE, "couldn't stat `%s': %s",
1342 sun.sun_path, strerror(errno));
1344 if (!S_ISSOCK(st.st_mode))
1345 die(EXIT_FAILURE, "object `%s' isn't a socket", sun.sun_path);
1346 T( trace(T_ADMIN, "admin: stale socket found; removing it"); )
1347 unlink(sun.sun_path);
1351 chmod(sun.sun_path, 0600);
1352 fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
1354 die(EXIT_FAILURE, "couldn't listen on socket: %s", strerror(errno));
1356 /* --- Listen to the socket --- */
1358 sel_initfile(&sel, &sock, fd, SEL_READ, a_accept, 0);
1362 T( trace_custom(a_trace, 0);
1363 trace(T_ADMIN, "admin: enabled custom tracing"); )
1366 /* --- Set up signal handlers --- */
1368 sig_add(&s_term, SIGTERM, a_sigdie, 0);
1369 sig_add(&s_hup, SIGHUP, a_sighup, 0);
1370 signal(SIGPIPE, SIG_IGN);
1371 sigaction(SIGINT, 0, &sa);
1372 if (sa.sa_handler != SIG_IGN)
1373 sig_add(&s_int, SIGINT, a_sigdie, 0);
1376 /*----- That's all, folks -------------------------------------------------*/