3 * Admin interface for configuration
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 const trace_opt tr_opts[] = {
36 { 't', T_TUNNEL, "tunnel events" },
37 { 'r', T_PEER, "peer events" },
38 { 'a', T_ADMIN, "admin interface" },
39 { 's', T_KEYSET, "symmetric keyset management" },
40 { 'x', T_KEYEXCH, "key exchange" },
41 { 'm', T_KEYMGMT, "key management" },
42 { 'l', T_CHAL, "challenge management" },
43 { 'p', T_PACKET, "packet contents" },
44 { 'c', T_CRYPTO, "crypto details" },
45 { 'A', T_ALL, "all of the above" },
49 unsigned tr_flags = 0;
52 static const trace_opt w_opts[] = {
53 { 't', AF_TRACE, "trace messages" },
54 { 'n', AF_NOTE, "asynchronous notifications" },
55 { 'w', AF_WARN, "warnings" },
56 { 'A', AF_ALLMSGS, "all of the above" },
60 /*----- Static variables --------------------------------------------------*/
65 static const char *sockname;
66 static sym_table a_svcs;
67 static unsigned flags = 0;
68 static admin *a_stdin = 0;
69 static sig s_term, s_int, s_hup;
73 #define F_FOREGROUND 4u
75 #define T_RESOLVE SEC(30)
78 static void a_destroy(admin */*a*/);
80 #define BOOL(x) ((x) ? "t" : "nil")
82 /*----- Output functions --------------------------------------------------*/
84 /* --- @trywrite@ --- *
86 * Arguments: @admin *a@ = pointer to an admin block
87 * @const char *p@ = pointer to buffer to write
88 * @size_t sz@ = size of data to write
90 * Returns: The number of bytes written, or less than zero on error.
92 * Use: Attempts to write data to a client.
95 static ssize_t trywrite(admin *a, const char *p, size_t sz)
102 n = write(a->w.fd, p, sz);
112 if (errno != EAGAIN && errno != EWOULDBLOCK) {
114 a_warn("ADMIN", "client-write-error", "?ERRNO", A_END);
121 /* --- @doqueue@ -- *
123 * Arguments: @oqueue *q@ = pointer to output queue
124 * @const char *p@ = pointer to buffer to write
125 * @size_t sz@ = size of buffer
127 * Returns: Nonzero if the queue was previously empty.
129 * Use: Queues data to be written later.
132 static int doqueue(oqueue *q, const char *p, size_t sz)
141 else if (o->p_in < o->buf + OBUFSZ)
145 o = xmalloc(sizeof(obuf));
147 o->p_in = o->p_out = o->buf;
155 n = o->buf + OBUFSZ - o->p_in;
158 memcpy(o->p_in, p, n);
167 /* --- @dosend@ --- *
169 * Arguemnts: @admin *a@ = pointer to an admin block
170 * @const char *p@ = pointer to buffer to write
171 * @size_t sz@ = size of data to write
175 * Use: Sends data to an admin client.
178 static void dosend(admin *a, const char *p, size_t sz)
185 if ((n = trywrite(a, p, sz)) < 0)
192 if (doqueue(&a->out, p, sz))
196 /* --- @a_flush@ --- *
198 * Arguments: @int fd@ = file descriptor
199 * @unsigned mode@ = what's happening
200 * @void *v@ = pointer to my admin block
204 * Use: Flushes buffers when a client is ready to read again.
207 static void a_flush(int fd, unsigned mode, void *v)
215 if ((n = trywrite(a, o->p_out, o->p_in - o->p_out)) < 0)
218 if (o->p_in < o->p_out)
231 /*----- Utility functions -------------------------------------------------*/
233 /* --- @a_vformat@ --- *
235 * Arguments: @dstr *d@ = where to leave the formatted message
236 * @const char *fmt@ = pointer to format string
237 * @va_list ap@ = arguments in list
241 * Use: Main message token formatting driver.
244 static void a_vformat(dstr *d, const char *fmt, va_list ap)
251 dstr_vputf(d, fmt + 1, &ap);
252 } else if (*fmt == '?') {
253 if (strcmp(fmt, "?ADDR") == 0) {
254 const addr *a = va_arg(ap, const addr *);
255 switch (a->sa.sa_family) {
257 u_quotify(d, "INET");
258 u_quotify(d, inet_ntoa(a->sin.sin_addr));
259 dstr_putf(d, " %u", (unsigned)ntohs(a->sin.sin_port));
264 } else if (strcmp(fmt, "?B64") == 0) {
265 const octet *p = va_arg(ap, const octet *);
266 size_t n = va_arg(ap, size_t);
272 base64_encode(&b64, p, n, d);
273 base64_encode(&b64, 0, 0, d);
274 while (d->len && d->buf[d->len - 1] == '=') d->len--;
275 } else if (strcmp(fmt, "?TOKENS") == 0) {
276 const char *const *av = va_arg(ap, const char *const *);
277 while (*av) u_quotify(d, *av++);
278 } else if (strcmp(fmt, "?PEER") == 0)
279 u_quotify(d, p_name(va_arg(ap, peer *)));
280 else if (strcmp(fmt, "?ERRNO") == 0) {
281 dstr_putf(d, " E%d", errno);
282 u_quotify(d, strerror(errno));
286 if (*fmt == '!') fmt++;
288 dstr_vputf(&dd, fmt, &ap);
289 u_quotify(d, dd.buf);
291 fmt = va_arg(ap, const char *);
297 /* --- @a_write@, @a_vwrite@ --- *
299 * Arguments: @admin *a@ = admin connection to write to
300 * @const char *status@ = status code to report
301 * @const char *tag@ = tag string, or null
302 * @const char *fmt@ = pointer to format string
303 * @va_list ap@ = arguments in list
304 * @...@ = other arguments
308 * Use: Sends a message to an admin connection.
311 static void a_vwrite(admin *a, const char *status, const char *tag,
312 const char *fmt, va_list ap)
316 if (tag) dstr_puts(&d, "BG");
317 dstr_puts(&d, status);
318 if (tag) u_quotify(&d, tag);
319 a_vformat(&d, fmt, ap);
321 dosend(a, d.buf, d.len);
325 static void a_write(admin *a, const char *status, const char *tag,
326 const char *fmt, ...)
331 a_vwrite(a, status, tag, fmt, ap);
335 /* --- @a_ok@, @a_info@, @a_fail@ --- *
337 * Arguments: @admin *a@ = connection
338 * @const char *fmt@ = format string
339 * @...@ = other arguments
343 * Use: Convenience functions for @a_write@.
346 static void a_ok(admin *a) { a_write(a, "OK", 0, A_END); }
348 static void a_info(admin *a, const char *fmt, ...)
353 a_vwrite(a, "INFO", 0, fmt, ap);
357 static void a_fail(admin *a, const char *fmt, ...)
362 a_vwrite(a, "FAIL", 0, fmt, ap);
366 /* --- @a_alert@, @a_valert@, @a_rawalert@ --- *
368 * Arguments: @unsigned f_and, f_eq@ = filter for connections
369 * @const char *status@ = status string
370 * @const char *fmt@ = pointer to format string
371 * @const char *p@ = pointer to raw string
372 * @size_t sz@ = size of raw string
373 * @va_list ap@ = arguments in list
374 * @...@ = other arguments
378 * Use: Write a message to all admin connections matched by the given
382 static void a_rawalert(unsigned f_and, unsigned f_eq, const char *status,
383 const char *p, size_t sz)
388 if (!(flags & F_INIT))
390 dstr_puts(&d, status);
393 dstr_putm(&d, p, sz);
398 for (a = admins; a; a = aa) {
400 if ((a->f & f_and) == f_eq)
401 dosend(a, d.buf, d.len);
406 static void a_valert(unsigned f_and, unsigned f_eq, const char *status,
407 const char *fmt, va_list ap)
411 if (!(flags & F_INIT))
413 a_vformat(&d, fmt, ap);
414 a_rawalert(f_and, f_eq, status, fmt ? d.buf : 0, fmt ? d.len : 0);
418 static void a_alert(unsigned f_and, unsigned f_eq, const char *status,
419 const char *fmt, ...)
424 a_valert(f_and, f_eq, status, fmt, ap);
428 /* --- @a_warn@ --- *
430 * Arguments: @const char *fmt@ = pointer to format string
431 * @...@ = other arguments
435 * Use: Informs all admin connections of a warning.
438 void a_warn(const char *fmt, ...)
444 a_valert(0, 0, "WARN", fmt, ap);
447 fprintf(stderr, "%s: ", QUIS);
448 a_vformat(&d, fmt, ap);
450 dstr_write(&d, stderr);
456 /* --- @a_trace@ --- *
458 * Arguments: @const char *p@ = pointer to a buffer
459 * @size_t sz@ = size of the buffer
460 * @void *v@ = uninteresting pointer
464 * Use: Custom trace output handler. Sends trace messages to
465 * interested admin connections.
469 static void a_trace(const char *p, size_t sz, void *v)
470 { a_rawalert(AF_TRACE, AF_TRACE, "TRACE", p, sz); }
473 /* --- @a_notify@ --- *
475 * Arguments: @const char *fmt@ = pointer to format string
476 * @...@ = other arguments
480 * Use: Sends a notification to interested admin connections.
483 void a_notify(const char *fmt, ...)
488 a_valert(AF_NOTE, AF_NOTE, "NOTE", fmt, ap);
492 /* --- @a_quit@ --- *
498 * Use: Shuts things down nicely.
505 FOREACH_PEER(p, { p_destroy(p); });
509 /* --- @a_sigdie@ --- *
511 * Arguments: @int sig@ = signal number
512 * @void *v@ = an uninteresting argument
516 * Use Shuts down on receipt of a fatal signal.
519 static void a_sigdie(int sig, void *v)
525 case SIGTERM: p = "SIGTERM"; break;
526 case SIGINT: p = "SIGINT"; break;
528 sprintf(buf, "%i", sig);
532 a_warn("SERVER", "quit", "signal", "%s", p, A_END);
536 /* --- @a_sighup@ --- *
538 * Arguments: @int sig@ = signal number
539 * @void *v@ = an uninteresting argument
543 * Use Logs a message about SIGHUP not being useful.
546 static void a_sighup(int sig, void *v)
547 { a_warn("SERVER", "ignore", "signal", "SIGHUP", A_END); }
549 /* --- @a_parsetime@ --- *
551 * Arguments; @const char *p@ = time string to parse
553 * Returns: Time in seconds, or @< 0@ on error.
556 static long a_parsetime(const char *p)
559 long t = strtol(p, &q, 0);
565 case 's': if (q[1] != 0)
572 /* --- @a_findpeer@ --- *
574 * Arguments: @admin *a@ = admin connection
575 * @const char *pn@ = peer name
577 * Returns: The peer, or null if not there.
579 * Use: Finds a peer, reporting an error if it failed.
582 static peer *a_findpeer(admin *a, const char *pn)
586 if ((p = p_find(pn)) == 0)
587 a_fail(a, "unknown-peer", "%s", pn, A_END);
591 /*----- Backgrounded operations -------------------------------------------*/
594 (((admin_bgop *)(bg))->tag ? ((admin_bgop *)(bg))->tag : "<foreground>")
596 /* --- @a_bgfind@ --- *
598 * Arguments: @admin *a@ = a client block
599 * @const char *tag@ = the requested tag
601 * Returns: The requested background job, or null.
604 static admin_bgop *a_bgfind(admin *a, const char *tag)
608 for (bg = a->bg; bg; bg = bg->next) {
609 if (bg->tag && strcmp(tag, bg->tag) == 0)
615 /* --- @a_bgrelease@ --- *
617 * Arguments: @admin_bgop *bg@ = backgrounded operation
621 * Use: Removes a backgrounded operation from the queue, since
622 * (presumably) it's done.
625 static void a_bgrelease(admin_bgop *bg)
629 T( trace(T_ADMIN, "admin: release bgop %s", BGTAG(bg)); )
630 if (bg->tag) xfree(bg->tag);
631 else selbuf_enable(&a->b);
632 if (bg->next) bg->next->prev = bg->prev;
633 if (bg->prev) bg->prev->next = bg->next;
634 else a->bg = bg->next;
636 if (!a->bg && (a->f & AF_CLOSE)) a_destroy(a);
639 /* --- @a_bgok@, @a_bginfo@, @a_bgfail@ --- *
641 * Arguments: @admin_bgop *bg@ = backgrounded operation
642 * @const char *fmt@ = format string
643 * @...@ = other arguments
647 * Use: Convenience functions for @a_write@.
650 static void a_bgok(admin_bgop *bg)
651 { a_write(bg->a, "OK", bg->tag, A_END); }
653 static void a_bginfo(admin_bgop *bg, const char *fmt, ...)
657 a_vwrite(bg->a, "INFO", bg->tag, fmt, ap);
661 static void a_bgfail(admin_bgop *bg, const char *fmt, ...)
665 a_vwrite(bg->a, "FAIL", bg->tag, fmt, ap);
669 /* --- @a_bgadd@ --- *
671 * Arguments: @admin *a@ = administration connection
672 * @admin_bgop *bg@ = pointer to background operation
673 * @const char *tag@ = background tag, or null for foreground
674 * @void (*cancel)(admin_bgop *)@ = cancel function
676 * Returns: Zero for success, nonzero on failure.
678 * Use: Links a background job into the list.
681 static int a_bgadd(admin *a, admin_bgop *bg, const char *tag,
682 void (*cancel)(admin_bgop *))
685 if (a_bgfind(a, tag)) {
686 a_fail(a, "tag-exists", "%s", tag, A_END);
689 bg->tag = xstrdup(tag);
693 selbuf_disable(&a->b);
699 if (a->bg) a->bg->prev = bg;
701 T( trace(T_ADMIN, "admin: add bgop %s", BGTAG(bg)); )
702 if (tag) a_write(a, "DETACH", tag, A_END);
706 /*----- Job table manipulation --------------------------------------------*/
709 #define JOB_INDEXMASK ((1ul << JOB_SHIFT) - 1)
710 #define JOB_SEQMASK ((1ul << (32 - JOB_SHIFT)) - 1)
712 #define JOB_END 0xfffffffful
714 static unsigned long a_joboffset;
716 /* --- @a_jobidencode@ --- *
718 * Arguments: @admin_svcop *svc@ = pointer to a service operation
720 * Returns: A jobid for this job, in an internal static buffer.
722 * Use: Constructs a jobid. In order to dissuade people from
723 * predicting jobids, we obfuscate them.
725 * A `raw' jobid consists of two 16-bit fields. The low 16 bits
726 * are an index into a big array. The high 16 bits are a
727 * sequence number recording how many times that slot has been
730 * This `raw' jobid is then obfuscated by adding a randomly-
731 * generated offset, and multiplying (mod %$2^{32}$%) by a fixed
735 static const char *a_jobidencode(admin_svcop *svc)
737 admin_jobtable *j = &svc->prov->j;
742 assert(svc->index <= JOB_INDEXMASK);
743 seq = j->v[svc->index].seq;
744 assert(seq <= JOB_SEQMASK);
745 pre = (unsigned long)svc->index | ((unsigned long)seq << JOB_SHIFT);
746 sprintf(buf, "J%08lx", ((pre + a_joboffset) * 0x0f87a7a3ul) & 0xffffffff);
750 /* --- @a_jobiddecode@ --- *
752 * Arguments: @admin_jobtable *j@ = pointer to a job table
753 * @const char *jid@ = pointer to a jobid string
755 * Returns: A pointer to the job's @svcop@ structure.
758 static admin_svcop *a_jobiddecode(admin_jobtable *j, const char *jid)
765 for (i = 1; i < 9; i++) {
766 if (!isxdigit((unsigned char)jid[i]))
771 pre = strtoul(jid + 1, 0, 16);
772 pre = ((pre * 0xbd11c40bul) - a_joboffset) & 0xffffffff;
773 i = pre & JOB_INDEXMASK;
774 if (i >= j->n || j->v[i].seq != (pre >> JOB_SHIFT))
776 return (j->v[i].u.op);
779 /* --- @a_jobcreate@ --- *
781 * Arguments: @admin *a@ = pointer to administration client
783 * Returns: A pointer to a freshly-allocated @svcop@, or null.
785 * Use: Allocates a fresh @svcop@ and links it into a job table.
788 static admin_svcop *a_jobcreate(admin *a)
793 admin_jobtable *j = &a->j;
795 if (j->free != JOB_END) {
797 j->free = j->v[i].u.next;
800 if (j->sz > JOB_INDEXMASK)
805 j->v = xmalloc(j->sz * sizeof(*j->v));
808 j->v = xrealloc(j->v, j->sz * sizeof(*j->v), sz * sizeof(*j->v));
814 svc = xmalloc(sizeof(*svc));
817 svc->next = j->active;
819 if (j->active) j->active->prev = svc;
822 IF_TRACING(T_ADMIN, {
823 trace(T_ADMIN, "admin: created job %s (%u)", a_jobidencode(svc), i);
828 /* --- @a_jobdestroy@ --- *
830 * Arguments: @admin_svcop *svc@ = pointer to job block
834 * Use: Frees up a completed (or cancelled) job.
837 static void a_jobdestroy(admin_svcop *svc)
839 admin *a = svc->prov;
840 admin_jobtable *j = &a->j;
841 unsigned i = svc->index;
843 IF_TRACING(T_ADMIN, {
844 trace(T_ADMIN, "admin: destroying job %s (%u)", a_jobidencode(svc), i);
846 assert(j->v[i].u.op = svc);
847 j->v[i].u.next = j->free;
850 if (svc->next) svc->next->prev = svc->prev;
851 if (svc->prev) svc->prev->next = svc->next;
852 else j->active = svc->next;
855 /* --- @a_jobtableinit@ --- *
857 * Arguments: @admin_jobtable *j@ = pointer to job table
861 * Use: Initializes a job table.
864 static void a_jobtableinit(admin_jobtable *j)
867 a_joboffset = GR_RANGE(&rand_global, 0xffffffff) + 1;
874 /* --- @a_jobtablefinal@ --- *
876 * Arguments: @admin_jobtable *j@ = pointer to job table
880 * Use: Closes down a job table.
883 static void a_jobtablefinal(admin_jobtable *j)
885 admin_svcop *svc, *ssvc;
887 for (svc = j->active; svc; svc = ssvc) {
889 a_bgfail(&svc->bg, "provider-failed", A_END);
890 a_bgrelease(&svc->bg);
892 if (j->v) xfree(j->v);
895 /*----- Services infrastructure -------------------------------------------*/
897 /* --- @a_svcfind@ --- *
899 * Arguments: @admin *a@ = the requesting client
900 * @const char *name@ = service name wanted
902 * Returns: The service requested, or null.
904 * Use: Finds a service; reports an error if the service couldn't be
908 static admin_service *a_svcfind(admin *a, const char *name)
912 if ((svc = sym_find(&a_svcs, name, -1, 0, 0)) == 0) {
913 a_fail(a, "unknown-service", "%s", name, A_END);
919 /* --- @a_svcunlink@ --- *
921 * Arguments: @admin_service *svc@ = pointer to service structure
925 * Use: Unlinks the service from its provider, without issuing a
926 * message or freeing the structure. The version string is
930 static void a_svcunlink(admin_service *svc)
933 svc->next->prev = svc->prev;
935 svc->prev->next = svc->next;
937 svc->prov->svcs = svc->next;
941 /* --- @a_svcrelease@ --- *
943 * Arguments: @admin_service *svc@ = pointer to service structure
947 * Use: Releases a service and frees its structure.
950 static void a_svcrelease(admin_service *svc)
952 a_notify("SVCRELEASE", "%s", SYM_NAME(svc), A_END);
954 sym_remove(&a_svcs, svc);
957 /*----- Name resolution operations ----------------------------------------*/
959 /* --- @a_resolved@ --- *
961 * Arguments: @struct hostent *h@ = pointer to resolved hostname
962 * @void *v@ = pointer to resolver operation
966 * Use: Handles a completed name resolution.
969 static void a_resolved(struct hostent *h, void *v)
973 T( trace(T_ADMIN, "admin: resop %s resolved", BGTAG(r)); )
976 a_bgfail(&r->bg, "resolve-error", "%s", r->addr, A_END);
977 r->func(r, ARES_FAIL);
979 memcpy(&r->sa.sin.sin_addr, h->h_addr, sizeof(struct in_addr));
987 /* --- @a_restimer@ --- *
989 * Arguments: @struct timeval *tv@ = timer
990 * @void *v@ = pointer to resolver operation
994 * Use: Times out a resolver.
997 static void a_restimer(struct timeval *tv, void *v)
1001 T( trace(T_ADMIN, "admin: resop %s timeout", BGTAG(r)); )
1002 a_bgfail(&r->bg, "resolver-timeout", "%s", r->addr, A_END);
1003 r->func(r, ARES_FAIL);
1006 a_bgrelease(&r->bg);
1009 /* --- @a_rescancel@ --- *
1011 * Arguments: @admin_bgop *bg@ = background operation
1015 * Use: Cancels an add operation.
1018 static void a_rescancel(admin_bgop *bg)
1020 admin_resop *r = (admin_resop *)bg;
1022 T( trace(T_ADMIN, "admin: cancel resop %s", BGTAG(r)); )
1023 r->func(r, ARES_FAIL);
1029 /* --- @a_resolve@ --- *
1031 * Arguments: @admin *a@ = administration connection
1032 * @admin_resop *r@ = resolver operation to run
1033 * @const char *tag@ = background operation tag
1034 * @void (*func)(struct admin_resop *, int@ = handler function
1035 * @unsigned ac@ = number of remaining arguments
1036 * @char *av[]@ = pointer to remaining arguments
1040 * Use: Cranks up a resolver job.
1043 static void a_resolve(admin *a, admin_resop *r, const char *tag,
1044 void (*func)(struct admin_resop *, int),
1045 unsigned ac, char *av[])
1052 /* --- Fill in the easy bits of address --- */
1054 r->bg.tag = "<starting>";
1057 if (mystrieq(av[i], "inet")) i++;
1058 if (ac - i != 1 && ac - i != 2) {
1059 a_fail(a, "bad-addr-syntax", "[inet] ADDRESS [PORT]", A_END);
1062 r->sa.sin.sin_family = AF_INET;
1063 r->sasz = sizeof(r->sa.sin);
1064 r->addr = xstrdup(av[i]);
1068 pt = strtoul(av[i + 1], &p, 0);
1070 struct servent *s = getservbyname(av[i + 1], "udp");
1072 a_fail(a, "unknown-service", "%s", av[i + 1], A_END);
1075 pt = ntohs(s->s_port);
1078 if (pt == 0 || pt >= 65536) {
1079 a_fail(a, "invalid-port", "%lu", pt, A_END);
1082 r->sa.sin.sin_port = htons(pt);
1084 /* --- Report backgrounding --- *
1086 * Do this for consistency of interface, even if we're going to get the
1087 * answer straight away.
1090 if (a_bgadd(a, &r->bg, tag, a_rescancel))
1092 T( trace(T_ADMIN, "admin: %u, resop %s, hostname `%s'",
1093 a->seq, BGTAG(r), r->addr); )
1095 /* --- If the name is numeric, do it the easy way --- */
1097 if (inet_aton(av[i], &r->sa.sin.sin_addr)) {
1098 T( trace(T_ADMIN, "admin: resop %s done the easy way", BGTAG(r)); )
1101 a_bgrelease(&r->bg);
1105 /* --- Store everything for later and crank up the resolver --- */
1107 gettimeofday(&tv, 0);
1108 tv.tv_sec += T_RESOLVE;
1109 sel_addtimer(&sel, &r->t, &tv, a_restimer, r);
1110 bres_byname(&r->r, r->addr, a_resolved, r);
1115 if (r->addr) xfree(r->addr);
1119 /*----- Option parsing ----------------------------------------------------*/
1121 #define OPTIONS(argc, argv, guts) do { \
1122 char **o_av = argv; \
1126 if (mystrieq(*o_av, "--")) { \
1131 if (**o_av == '-') \
1135 argc -= o_av - argv; \
1139 #define OPT(name, guts) if (mystrieq(*o_av, name)) { guts continue; }
1141 #define OPTARG(name, arg, guts) OPT(name, { \
1144 if (!arg) goto bad_syntax; \
1148 #define OPTTIME(name, arg, guts) OPTARG(name, o_arg, { \
1150 if ((arg = a_parsetime(o_arg)) < 0) { \
1151 a_fail(a, "bad-time-spec", "%s", o_arg, A_END); \
1157 /*----- Adding peers ------------------------------------------------------*/
1159 /* --- @a_doadd@ --- *
1161 * Arguments: @admin_resop *r@ = resolver operation
1162 * @int rc@ = how it worked
1166 * Use: Handles a completed resolution.
1169 static void a_doadd(admin_resop *r, int rc)
1171 admin_addop *add = (admin_addop *)r;
1173 T( trace(T_ADMIN, "admin: done add op %s", BGTAG(add)); )
1175 if (rc == ARES_OK) {
1176 add->peer.sasz = add->r.sasz;
1177 add->peer.sa = add->r.sa;
1178 if (p_findbyaddr(&add->r.sa))
1179 a_bgfail(&add->r.bg, "peer-addr-exists", "?ADDR", &add->r.sa, A_END);
1180 else if (p_find(add->peer.name))
1181 a_bgfail(&add->r.bg, "peer-exists", "%s", add->peer.name, A_END);
1182 else if (!p_create(&add->peer))
1183 a_bgfail(&add->r.bg, "peer-create-fail", "%s", add->peer.name, A_END);
1188 xfree(add->peer.name);
1191 /* --- @acmd_add@ --- *
1193 * Arguments: @admin *a@ = connection which requested the addition
1194 * @unsigned ac@ = argument count
1195 * @char *av[]@ = pointer to the argument list
1199 * Use: Adds a new peer.
1202 static void acmd_add(admin *a, unsigned ac, char *av[])
1204 const char *tag = 0;
1207 /* --- Set stuff up --- */
1209 add = xmalloc(sizeof(*add));
1212 add->peer.tops = tun_default;
1215 /* --- Parse options --- */
1218 OPTARG("-background", arg, { tag = arg; })
1219 OPTARG("-tunnel", arg, {
1223 a_fail(a, "unknown-tunnel", "%s", arg, A_END);
1226 if (mystrieq(arg, tunnels[i]->name)) {
1227 add->peer.tops = tunnels[i];
1232 OPTTIME("-keepalive", t, { add->peer.t_ka = t; })
1233 OPT("-cork", { add->peer.kxf |= KXF_CORK; })
1236 /* --- Make sure someone's not got there already --- */
1238 if (!av[0] || !av[1])
1241 a_fail(a, "peer-exists", "%s", *av, A_END);
1244 add->peer.name = xstrdup(*av++);
1247 /* --- Crank up the resolver --- */
1249 a_resolve(a, &add->r, tag, a_doadd, ac, av);
1252 /* --- Clearing up --- */
1255 a_fail(a, "bad-syntax", "add", "[OPTIONS] PEER ADDR ...", A_END);
1257 if (add->peer.name) xfree(add->peer.name);
1262 /*----- Ping --------------------------------------------------------------*/
1264 /* --- @a_pingcancel@ --- *
1266 * Arguments: @admin_bgop *bg@ = background operation block
1270 * Use: Cancels a running ping.
1273 static void a_pingcancel(admin_bgop *bg)
1275 admin_pingop *pg = (admin_pingop *)bg;
1276 T( trace(T_ADMIN, "admin: cancel ping op %s", BGTAG(pg)); )
1277 p_pingdone(&pg->ping, PING_NONOTIFY);
1280 /* --- @a_pong@ --- *
1282 * Arguments: @int rc@ = return code
1283 * @void *v@ = ping operation block
1287 * Use: Collects what happened to a ping message.
1290 static void a_pong(int rc, void *v)
1292 admin_pingop *pg = v;
1298 gettimeofday(&tv, 0);
1299 tv_sub(&tv, &tv, &pg->pingtime);
1300 millis = (double)tv.tv_sec * 1000 + (double)tv.tv_usec/1000;
1301 a_bginfo(&pg->bg, "ping-ok", "%.1f", millis, A_END);
1305 a_bginfo(&pg->bg, "ping-timeout", A_END);
1309 a_bginfo(&pg->bg, "ping-peer-died", A_END);
1315 T( trace(T_ADMIN, "admin: ponged ping op %s", BGTAG(pg)); )
1316 a_bgrelease(&pg->bg);
1319 /* --- @acmd_ping@, @acmd_eping@ --- *
1321 * Arguments: @admin *a@ = connection which requested the ping
1322 * @unsigned ac@ = argument count
1323 * @char *av[]@ = pointer to the argument list
1327 * Use: Pings a peer.
1330 static void a_ping(admin *a, unsigned ac, char *av[],
1331 const char *cmd, unsigned msg)
1335 admin_pingop *pg = 0;
1336 const char *tag = 0;
1339 OPTARG("-background", arg, { tag = arg; })
1340 OPTTIME("-timeout", arg, { t = arg; })
1342 if (!*av || av[1]) goto bad_syntax;
1343 if ((p = a_findpeer(a, *av)) == 0)
1345 pg = xmalloc(sizeof(*pg));
1346 gettimeofday(&pg->pingtime, 0);
1347 if (a_bgadd(a, &pg->bg, tag, a_pingcancel))
1349 T( trace(T_ADMIN, "admin: ping op %s: %s to %s",
1350 BGTAG(pg), cmd, p_name(p)); )
1351 if (p_pingsend(p, &pg->ping, msg, t, a_pong, pg)) {
1352 a_bgfail(&pg->bg, "ping-send-failed", A_END);
1353 a_bgrelease(&pg->bg);
1358 a_fail(a, "bad-syntax", "%s", cmd, "[OPTIONS] PEER", cmd, A_END);
1364 static void acmd_ping(admin *a, unsigned ac, char *av[])
1365 { a_ping(a, ac, av, "ping", MISC_PING); }
1366 static void acmd_eping(admin *a, unsigned ac, char *av[])
1367 { a_ping(a, ac, av, "eping", MISC_EPING); }
1369 /*----- Service commands --------------------------------------------------*/
1371 static void acmd_svcclaim(admin *a, unsigned ac, char *av[])
1376 svc = sym_find(&a_svcs, av[0], -1, sizeof(*svc), &f);
1378 if (versioncmp(av[1], svc->version) <= 0) {
1381 "%s", SYM_NAME(svc),
1386 a_write(svc->prov, "SVCCLAIM", 0, "%s", av[0], "%s", av[1], A_END);
1390 svc->version = xstrdup(av[1]);
1391 svc->next = a->svcs;
1393 if (a->svcs) a->svcs->prev = svc;
1395 a_notify("SVCCLAIM", "%s", SYM_NAME(svc), "%s", svc->version, A_END);
1399 static void acmd_svcrelease(admin *a, unsigned ac, char *av[])
1403 if ((svc = a_svcfind(a, av[0])) == 0)
1405 if (svc->prov != a) {
1406 a_fail(a, "not-service-provider", "%s", SYM_NAME(svc), A_END);
1413 static void acmd_svcensure(admin *a, unsigned ac, char *av[])
1417 if ((svc = a_svcfind(a, av[0])) == 0)
1419 if (av[1] && versioncmp(svc->version, av[1]) < 0) {
1420 a_fail(a, "service-too-old",
1421 "%s", SYM_NAME(svc),
1429 static void acmd_svcquery(admin *a, unsigned ac, char *av[])
1433 if ((svc = a_svcfind(a, av[0])) != 0) {
1434 a_info(a, "name=%s", SYM_NAME(svc), "version=%s", svc->version, A_END);
1439 static void acmd_svclist(admin *a, unsigned ac, char *av[])
1444 for (sym_mkiter(&i, &a_svcs); (svc = sym_next(&i)) != 0; )
1445 a_info(a, "%s", SYM_NAME(svc), "%s", svc->version, A_END);
1449 static void a_canceljob(admin_bgop *bg)
1451 admin_svcop *svc = (admin_svcop *)bg;
1453 a_write(svc->prov, "SVCCANCEL", 0, "%s", a_jobidencode(svc), A_END);
1457 static void acmd_svcsubmit(admin *a, unsigned ac, char *av[])
1459 const char *tag = 0;
1462 const char *ver = 0;
1466 OPTARG("-background", arg, { tag = arg; })
1467 OPTARG("-version", arg, { ver = arg; })
1469 if (!*av) goto bad_syntax;
1470 if ((svc = a_svcfind(a, *av)) == 0) goto fail;
1471 if (ver && versioncmp(svc->version, ver) < 0) {
1472 a_fail(a, "service-too-old",
1473 "%s", SYM_NAME(svc),
1478 if ((svcop = a_jobcreate(svc->prov)) == 0) {
1479 a_fail(a, "provider-overloaded", A_END);
1482 if (a_bgadd(a, &svcop->bg, tag, a_canceljob)) {
1483 a_jobdestroy(svcop);
1486 a_write(svc->prov, "SVCJOB", 0,
1487 "%s", a_jobidencode(svcop),
1493 a_fail(a, "bad-syntax", "svcsubmit", "[OPTIONS] SERVICE ARGS...", A_END);
1500 static void a_replycmd(admin *a, const char *status, int donep, char *av[])
1504 if ((svc = a_jobiddecode(&a->j, av[0])) == 0) {
1505 a_fail(a, "unknown-jobid", av[0], A_END);
1508 a_write(svc->bg.a, status, svc->bg.tag, "?TOKENS", av + 1, A_END);
1511 a_bgrelease(&svc->bg);
1516 static void acmd_svcok(admin *a, unsigned ac, char *av[])
1517 { a_replycmd(a, "OK", 1, av); }
1518 static void acmd_svcinfo(admin *a, unsigned ac, char *av[])
1519 { a_replycmd(a, "INFO", 0, av); }
1520 static void acmd_svcfail(admin *a, unsigned ac, char *av[])
1521 { a_replycmd(a, "FAIL", 1, av); }
1523 /*----- Administration commands -------------------------------------------*/
1525 /* --- Miscellaneous commands --- */
1527 /* --- @traceish@ --- *
1529 * Arguments: @admin *a@ = connection to complain on
1530 * @unsigned ac@ = number of arguments
1531 * @char *av[]@ = vector of arguments
1532 * @const char *what@ = what we're messing with
1533 * @const trace_opt *tt@ = options table
1534 * @unsigned *ff@ = where the flags are
1536 * Returns: Nonzero if anything changed.
1538 * Use: Guts of trace-ish commands like `trace' and `watch'.
1541 static int traceish(admin *a, unsigned ac, char *av[],
1542 const char *what, const trace_opt *tt, unsigned *ff)
1546 if (!ac || strcmp(av[0], "?") == 0) {
1548 for (t = tt; t->ch; t++) {
1549 a_info(a, "*%c%c %s",
1550 t->ch, (*ff & t->f) == t->f ? '+' : ' ', t->help, A_END);
1560 case '+': sense = 1; break;
1561 case '-': sense = 0; break;
1563 for (t = tt; t->ch; t++) {
1565 if (sense) f |= t->f;
1570 a_fail(a, "bad-%s-option", what, "%c", *p, A_END);
1586 static void acmd_trace(admin *a, unsigned ac, char *av[])
1588 if (traceish(a, ac, av, "trace", tr_opts, &tr_flags))
1589 trace_level(tr_flags);
1594 static void acmd_watch(admin *a, unsigned ac, char *av[])
1595 { traceish(a, ac, av, "watch", w_opts, &a->f); }
1597 static void alertcmd(admin *a, unsigned f_and, unsigned f_eq,
1598 const char *status, char *av[])
1599 { a_alert(f_and, f_eq, status, "USER", "?TOKENS", av, A_END); a_ok(a); }
1600 static void acmd_notify(admin *a, unsigned ac, char *av[])
1601 { alertcmd(a, AF_NOTE, AF_NOTE, "NOTE", av); }
1602 static void acmd_warn(admin *a, unsigned ac, char *av[])
1603 { alertcmd(a, AF_WARN, AF_WARN, "WARN", av); }
1605 static void acmd_port(admin *a, unsigned ac, char *av[])
1606 { a_info(a, "%u", p_port(), A_END); a_ok(a); }
1608 static void acmd_daemon(admin *a, unsigned ac, char *av[])
1610 if (flags & F_DAEMON)
1611 a_fail(a, "already-daemon", A_END);
1613 a_notify("DAEMON", A_END);
1617 a_fail(a, "daemon-error", "?ERRNO", A_END);
1625 static void acmd_jobs(admin *a, unsigned ac, char *av[])
1629 for (bg = a->bg; bg; bg = bg->next) {
1631 a_info(a, "%s", bg->tag, A_END);
1636 static void acmd_bgcancel(admin *a, unsigned ac, char *av[])
1640 if ((bg = a_bgfind(a, av[0])) == 0)
1641 a_fail(a, "unknown-tag", "%s", av[0], A_END);
1649 static void acmd_list(admin *a, unsigned ac, char *av[])
1651 FOREACH_PEER(p, { a_info(a, "%s", p_name(p), A_END); });
1655 static void acmd_ifname(admin *a, unsigned ac, char *av[])
1659 if ((p = a_findpeer(a, av[0])) != 0) {
1660 a_info(a, "%s", p_ifname(p), A_END);
1665 static void acmd_setifname(admin *a, unsigned ac, char *av[])
1669 if ((p = a_findpeer(a, av[0])) != 0) {
1670 a_notify("NEWIFNAME", "?PEER", p, "%s", p_ifname(p), "%s", av[1], A_END);
1671 p_setifname(p, av[1]);
1676 static void acmd_getchal(admin *a, unsigned ac, char *av[])
1680 buf_init(&b, buf_i, PKBUFSZ);
1682 a_info(a, "?B64", BBASE(&b), (size_t)BLEN(&b), A_END);
1686 static void acmd_checkchal(admin *a, unsigned ac, char *av[])
1693 base64_decode(&b64, av[0], strlen(av[0]), &d);
1694 base64_decode(&b64, 0, 0, &d);
1695 buf_init(&b, d.buf, d.len);
1696 if (c_check(&b) || BBAD(&b) || BLEFT(&b))
1697 a_fail(a, "invalid-challenge", A_END);
1703 static void acmd_greet(admin *a, unsigned ac, char *av[])
1709 if ((p = a_findpeer(a, av[0])) != 0) {
1711 base64_decode(&b64, av[1], strlen(av[1]), &d);
1712 base64_decode(&b64, 0, 0, &d);
1713 p_greet(p, d.buf, d.len);
1719 static void acmd_addr(admin *a, unsigned ac, char *av[])
1724 if ((p = a_findpeer(a, av[0])) != 0) {
1726 assert(ad->sa.sa_family == AF_INET);
1727 a_info(a, "?ADDR", ad, A_END);
1732 static void acmd_peerinfo(admin *a, unsigned ac, char *av[])
1737 if ((p = a_findpeer(a, av[0])) != 0) {
1739 a_info(a, "tunnel=%s", ps->tops->name, A_END);
1740 a_info(a, "keepalive=%lu", ps->t_ka, A_END);
1745 static void acmd_servinfo(admin *a, unsigned ac, char *av[])
1747 a_info(a, "implementation=edgeware-tripe", A_END);
1748 a_info(a, "version=%s", VERSION, A_END);
1749 a_info(a, "daemon=%s", BOOL(flags & F_DAEMON), A_END);
1753 static void acmd_stats(admin *a, unsigned ac, char *av[])
1758 if ((p = a_findpeer(a, av[0])) == 0)
1762 a_info(a, "start-time=%s", timestr(st->t_start), A_END);
1763 a_info(a, "last-packet-time=%s", timestr(st->t_last), A_END);
1764 a_info(a, "last-keyexch-time=%s", timestr(st->t_kx), A_END);
1765 a_info(a, "packets-in=%lu", st->n_in, "bytes-in=%lu", st->sz_in, A_END);
1767 "packets-out=%lu", st->n_out,
1768 "bytes-out=%lu", st->sz_out,
1771 "keyexch-packets-in=%lu", st->n_kxin,
1772 "keyexch-bytes-in=%lu", st->sz_kxin,
1775 "keyexch-packets-out=%lu", st->n_kxout,
1776 "keyexch-bytes-out=%lu", st->sz_kxout,
1779 "ip-packets-in=%lu", st->n_ipin,
1780 "ip-bytes-in=%lu", st->sz_ipin,
1783 "ip-packets-out=%lu", st->n_ipout,
1784 "ip-bytes-out=%lu", st->sz_ipout,
1786 a_info(a, "rejected-packets=%lu", st->n_reject, A_END);
1790 static void acmd_kill(admin *a, unsigned ac, char *av[])
1794 if ((p = a_findpeer(a, av[0])) != 0) {
1800 static void acmd_forcekx(admin *a, unsigned ac, char *av[])
1804 if ((p = a_findpeer(a, av[0])) != 0) {
1805 kx_start(&p->kx, 1);
1810 static void acmd_reload(admin *a, unsigned ac, char *av[])
1811 { p_keyreload(); a_ok(a); }
1813 static void acmd_quit(admin *a, unsigned ac, char *av[])
1815 a_warn("SERVER", "quit", "admin-request", A_END);
1820 static void acmd_version(admin *a, unsigned ac, char *av[])
1822 a_info(a, "%s", PACKAGE, "%s", VERSION, A_END);
1826 static void acmd_tunnels(admin *a, unsigned ac, char *av[])
1830 for (i = 0; tunnels[i]; i++)
1831 a_info(a, "%s", tunnels[i]->name, A_END);
1835 /* --- The command table and help --- */
1837 typedef struct acmd {
1840 unsigned argmin, argmax;
1841 void (*func)(admin */*a*/, unsigned /*ac*/, char */*av*/[]);
1844 static void acmd_help(admin */*a*/, unsigned /*ac*/, char */*av*/[]);
1846 static const acmd acmdtab[] = {
1847 { "add", "[OPTIONS] PEER ADDR ...", 2, 0xffff, acmd_add },
1848 { "addr", "PEER", 1, 1, acmd_addr },
1849 { "bgcancel", "TAG", 1, 1, acmd_bgcancel },
1850 { "checkchal", "CHAL", 1, 1, acmd_checkchal },
1851 { "daemon", 0, 0, 0, acmd_daemon },
1852 { "eping", "[OPTIONS] PEER", 1, 0xffff, acmd_eping },
1853 { "forcekx", "PEER", 1, 1, acmd_forcekx },
1854 { "getchal", 0, 0, 0, acmd_getchal },
1855 { "greet", "PEER CHAL", 2, 2, acmd_greet },
1856 { "help", 0, 0, 0, acmd_help },
1857 { "ifname", "PEER", 1, 1, acmd_ifname },
1858 { "jobs", 0, 0, 0, acmd_jobs },
1859 { "kill", "PEER", 1, 1, acmd_kill },
1860 { "list", 0, 0, 0, acmd_list },
1861 { "notify", "MESSAGE ...", 1, 0xffff, acmd_notify },
1862 { "peerinfo", "PEER", 1, 1, acmd_peerinfo },
1863 { "ping", "[OPTIONS] PEER", 1, 0xffff, acmd_ping },
1864 { "port", 0, 0, 0, acmd_port },
1865 { "quit", 0, 0, 0, acmd_quit },
1866 { "reload", 0, 0, 0, acmd_reload },
1867 { "servinfo", 0, 0, 0, acmd_servinfo },
1868 { "setifname", "PEER NEW-NAME", 2, 2, acmd_setifname },
1869 { "svcclaim", "SERVICE VERSION", 2, 2, acmd_svcclaim },
1870 { "svcensure", "SERVICE [VERSION]", 1, 2, acmd_svcensure },
1871 { "svcfail", "JOBID TOKENS...", 1, 0xffff, acmd_svcfail },
1872 { "svcinfo", "JOBID TOKENS...", 1, 0xffff, acmd_svcinfo },
1873 { "svclist", 0, 0, 0, acmd_svclist },
1874 { "svcok", "JOBID", 1, 1, acmd_svcok },
1875 { "svcquery", "SERVICE", 1, 1, acmd_svcquery },
1876 { "svcrelease", "SERVICE", 1, 1, acmd_svcrelease },
1877 { "svcsubmit", "[OPTIONS] SERVICE TOKENS...",
1878 2, 0xffff, acmd_svcsubmit },
1879 { "stats", "PEER", 1, 1, acmd_stats },
1881 { "trace", "[OPTIONS]", 0, 1, acmd_trace },
1883 { "tunnels", 0, 0, 0, acmd_tunnels },
1884 { "version", 0, 0, 0, acmd_version },
1885 { "warn", "MESSAGE ...", 1, 0xffff, acmd_warn },
1886 { "watch", "[OPTIONS]", 0, 1, acmd_watch },
1890 static void acmd_help(admin *a, unsigned ac, char *av[])
1894 for (c = acmdtab; c->name; c++) {
1896 a_info(a, "%s", c->name, "*%s", c->help, A_END);
1898 a_info(a, "%s", c->name, A_END);
1903 /*----- Connection handling -----------------------------------------------*/
1905 /* --- @a_destroypending@ --- *
1911 * Use: Destroys pending admin connections at a safe time.
1914 static void a_destroypending(void)
1916 admin *a, *aa, *head;
1917 admin_bgop *bg, *bbg;
1918 admin_service *svc, *ssvc;
1920 /* --- Destroy connections marked as pending --- *
1922 * Slightly messy. Killing clients may cause others to finally die. Make
1923 * sure that they can be put on the list without clobbering anything or
1930 for (a = head; a; a = aa) {
1932 assert(a->f & AF_DEAD);
1934 /* --- Report what we're doing --- */
1936 T( trace(T_ADMIN, "admin: completing destruction of connection %u",
1939 /* --- If this is the foreground client then shut down --- */
1941 if (a->f & AF_FOREGROUND) {
1942 T( trace(T_ADMIN, "admin: foreground client quit: shutting down"); )
1943 a_warn("SERVER", "quit", "foreground-eof", A_END);
1947 /* --- Abort any background jobs in progress --- */
1949 for (bg = a->bg; bg; bg = bbg) {
1952 if (bg->tag) xfree(bg->tag);
1956 /* --- Release services I hold, and abort pending jobs --- */
1958 for (svc = a->svcs; svc; svc = ssvc) {
1962 a_jobtablefinal(&a->j);
1964 /* --- Close file descriptors and selectory --- */
1966 selbuf_destroy(&a->b);
1967 if (a->b.reader.fd != a->w.fd) close(a->b.reader.fd);
1969 if (a_stdin == a) a_stdin = 0;
1978 /* --- @a_destroy@ --- *
1980 * Arguments: @admin *a@ = pointer to an admin block
1984 * Use: Destroys an admin block. This requires a certain amount of
1988 static void freequeue(oqueue *q)
1992 for (o = q->hd; o; o = oo) {
1999 static void a_destroy(admin *a)
2004 if (a->next) a->next->prev = a->prev;
2005 if (a->prev) a->prev->next = a->next;
2006 else admins = a->next;
2008 if (a->out.hd) sel_rmfile(&a->w);
2015 T( trace(T_ADMIN, "admin: killing connection %u", a->seq); )
2018 /* --- @a_line@ --- *
2020 * Arguments: @char *p@ = pointer to the line read
2021 * @size_t len@ = length of the line
2022 * @void *vp@ = pointer to my admin block
2026 * Use: Handles a line of input.
2029 static void a_line(char *p, size_t len, void *vp)
2044 selbuf_disable(&a->b);
2048 ac = str_qsplit(p, av, N(av) - 1, 0, STRF_QUOTE);
2052 for (c = acmdtab; c->name; c++) {
2053 if (mystrieq(av[0], c->name)) {
2055 if (c->argmin > ac || ac > c->argmax) {
2057 a_fail(a, "bad-syntax", "%s", c->name, "", A_END);
2059 a_fail(a, "bad-syntax", "%s", c->name, "%s", c->help, A_END);
2061 c->func(a, ac, av + 1);
2065 a_fail(a, "unknown-command", "%s", av[0], A_END);
2068 /* --- @a_create@ --- *
2070 * Arguments: @int fd_in, fd_out@ = file descriptors to use
2071 * @unsigned f@ = initial flags to set
2075 * Use: Creates a new admin connection.
2078 void a_create(int fd_in, int fd_out, unsigned f)
2080 admin *a = CREATE(admin);
2082 T( static unsigned seq = 0;
2084 T( trace(T_ADMIN, "admin: accepted connection %u", a->seq); )
2088 a_jobtableinit(&a->j);
2090 if (fd_in == STDIN_FILENO) a_stdin = a;
2091 fdflags(fd_in, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
2092 if (fd_out != fd_in)
2093 fdflags(fd_out, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
2094 selbuf_init(&a->b, &sel, fd_in, a_line, a);
2095 sel_initfile(&sel, &a->w, fd_out, SEL_WRITE, a_flush, a);
2096 a->out.hd = a->out.tl = 0;
2099 if (admins) admins->prev = a;
2103 /* --- @a_accept@ --- *
2105 * Arguments: @int fd@ = file descriptor to accept
2106 * @unsigned mode@ = what to do
2107 * @void *v@ = uninteresting pointer
2111 * Use: Accepts a new admin connection.
2114 static void a_accept(int fd, unsigned mode, void *v)
2117 struct sockaddr_un sun;
2118 size_t sz = sizeof(sun);
2120 if ((nfd = accept(fd, (struct sockaddr *)&sun, &sz)) < 0) {
2121 if (errno != EINTR && errno != EAGAIN && errno != EWOULDBLOCK &&
2122 errno != ECONNABORTED && errno != EPROTO)
2123 a_warn("ADMIN", "accept-error", "?ERRNO", A_END);
2126 a_create(nfd, nfd, 0);
2129 /* --- @a_preselect@ --- *
2135 * Use: Informs the admin module that we're about to select again,
2136 * and that it should do cleanup things it has delayed until a
2140 void a_preselect(void) { if (a_dead) a_destroypending(); }
2142 /* --- @a_daemon@ --- *
2148 * Use: Informs the admin module that it's a daemon.
2151 void a_daemon(void) { flags |= F_DAEMON; }
2153 /* --- @a_init@ --- *
2155 * Arguments: @const char *name@ = socket name to create
2159 * Use: Creates the admin listening socket.
2162 void a_init(const char *name)
2166 struct sockaddr_un sun;
2167 struct sigaction sa;
2170 /* --- Create services table --- */
2172 sym_create(&a_svcs);
2174 /* --- Set up the socket address --- */
2176 sz = strlen(name) + 1;
2177 if (sz > sizeof(sun.sun_path))
2178 die(EXIT_FAILURE, "socket name `%s' too long", name);
2180 sun.sun_family = AF_UNIX;
2181 memcpy(sun.sun_path, name, sz);
2182 sz += offsetof(struct sockaddr_un, sun_path);
2184 /* --- Attempt to bind to the socket --- */
2188 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
2189 die(EXIT_FAILURE, "couldn't create socket: %s", strerror(errno));
2190 if (bind(fd, (struct sockaddr *)&sun, sz) < 0) {
2193 if (errno != EADDRINUSE) {
2194 die(EXIT_FAILURE, "couldn't bind to address `%s': %s",
2195 sun.sun_path, strerror(e));
2198 die(EXIT_FAILURE, "too many retries; giving up");
2200 if (!connect(fd, (struct sockaddr *)&sun, sz)) {
2201 die(EXIT_FAILURE, "server already listening on admin socket `%s'",
2204 if (errno != ECONNREFUSED)
2205 die(EXIT_FAILURE, "couldn't bind to address: %s", strerror(e));
2206 if (stat(sun.sun_path, &st)) {
2207 die(EXIT_FAILURE, "couldn't stat `%s': %s",
2208 sun.sun_path, strerror(errno));
2210 if (!S_ISSOCK(st.st_mode))
2211 die(EXIT_FAILURE, "object `%s' isn't a socket", sun.sun_path);
2212 T( trace(T_ADMIN, "admin: stale socket found; removing it"); )
2213 unlink(sun.sun_path);
2217 chmod(sun.sun_path, 0600);
2218 fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
2220 die(EXIT_FAILURE, "couldn't listen on socket: %s", strerror(errno));
2222 /* --- Listen to the socket --- */
2224 sel_initfile(&sel, &sock, fd, SEL_READ, a_accept, 0);
2228 T( trace_custom(a_trace, 0);
2229 trace(T_ADMIN, "admin: enabled custom tracing"); )
2232 /* --- Set up signal handlers --- */
2234 sig_add(&s_term, SIGTERM, a_sigdie, 0);
2235 sig_add(&s_hup, SIGHUP, a_sighup, 0);
2236 signal(SIGPIPE, SIG_IGN);
2237 sigaction(SIGINT, 0, &sa);
2238 if (sa.sa_handler != SIG_IGN)
2239 sig_add(&s_int, SIGINT, a_sigdie, 0);
2242 /*----- That's all, folks -------------------------------------------------*/