server/: Issue `WARN' messages for (most) initialization errors.
[tripe] / server / admin.c
CommitLineData
410c8acf 1/* -*-c-*-
2 *
410c8acf 3 * Admin interface for configuration
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 *
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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 *
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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 */
25
410c8acf 26/*----- Header files ------------------------------------------------------*/
27
28#include "tripe.h"
29
30/*----- Global variables --------------------------------------------------*/
31
32#ifndef NTRACE
33
34const trace_opt tr_opts[] = {
35 { 't', T_TUNNEL, "tunnel events" },
36 { 'r', T_PEER, "peer events" },
37 { 'a', T_ADMIN, "admin interface" },
410c8acf 38 { 's', T_KEYSET, "symmetric keyset management" },
39 { 'x', T_KEYEXCH, "key exchange" },
40 { 'm', T_KEYMGMT, "key management" },
37941236 41 { 'l', T_CHAL, "challenge management" },
388e0319 42 { 'v', T_PRIVSEP, "privilege separation" },
37941236 43 { 'p', T_PACKET, "packet contents" },
44 { 'c', T_CRYPTO, "crypto details" },
410c8acf 45 { 'A', T_ALL, "all of the above" },
46 { 0, 0, 0 }
47};
48
49unsigned tr_flags = 0;
50#endif
51
3cdc3f3a 52static const trace_opt w_opts[] = {
8ed35e02 53#ifndef NTRACE
3cdc3f3a 54 { 't', AF_TRACE, "trace messages" },
8ed35e02 55#endif
3cdc3f3a 56 { 'n', AF_NOTE, "asynchronous notifications" },
57 { 'w', AF_WARN, "warnings" },
58 { 'A', AF_ALLMSGS, "all of the above" },
59 { 0, 0, 0 }
60};
61
410c8acf 62/*----- Static variables --------------------------------------------------*/
63
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64#ifdef HAVE_LIBADNS
65 static adns_state ads;
66 sel_hook hook;
67#endif
410c8acf 68static admin *admins;
c511e1f9 69static admin *a_dead;
410c8acf 70static sel_file sock;
7737eb87 71static const char *sockname = 0;
be6a1b7a 72static sym_table a_svcs;
410c8acf 73static unsigned flags = 0;
74static admin *a_stdin = 0;
75static sig s_term, s_int, s_hup;
76
77#define F_DAEMON 1u
78#define F_INIT 2u
46dde080 79#define F_FOREGROUND 4u
410c8acf 80
81#define T_RESOLVE SEC(30)
0ba8de86 82#define T_PING SEC(5)
410c8acf 83
fd3cf232 84static void a_destroy(admin */*a*/);
fd3cf232 85
060ca767 86#define BOOL(x) ((x) ? "t" : "nil")
87
fd3cf232 88/*----- Output functions --------------------------------------------------*/
89
90/* --- @trywrite@ --- *
91 *
92 * Arguments: @admin *a@ = pointer to an admin block
93 * @const char *p@ = pointer to buffer to write
94 * @size_t sz@ = size of data to write
95 *
96 * Returns: The number of bytes written, or less than zero on error.
97 *
98 * Use: Attempts to write data to a client.
99 */
100
101static ssize_t trywrite(admin *a, const char *p, size_t sz)
102{
103 ssize_t n, done = 0;
104
105again:
106 if (!sz)
107 return (done);
108 n = write(a->w.fd, p, sz);
109 if (n > 0) {
110 done += n;
111 p += n;
112 sz -= n;
113 goto again;
114 }
115 if (n < 0) {
116 if (errno == EINTR)
117 goto again;
118 if (errno != EAGAIN && errno != EWOULDBLOCK) {
119 a_destroy(a);
f43df819 120 a_warn("ADMIN", "client-write-error", "?ERRNO", A_END);
fd3cf232 121 return (-1);
122 }
123 }
124 return (done);
125}
126
de014da6 127/* --- @doqueue@ -- *
fd3cf232 128 *
de014da6 129 * Arguments: @oqueue *q@ = pointer to output queue
fd3cf232 130 * @const char *p@ = pointer to buffer to write
de014da6 131 * @size_t sz@ = size of buffer
fd3cf232 132 *
de014da6 133 * Returns: Nonzero if the queue was previously empty.
fd3cf232 134 *
de014da6 135 * Use: Queues data to be written later.
fd3cf232 136 */
137
de014da6 138static int doqueue(oqueue *q, const char *p, size_t sz)
fd3cf232 139{
fd3cf232 140 obuf *o;
de014da6 141 int rc = 0;
142 size_t n;
fd3cf232 143
de014da6 144 o = q->tl;
fd3cf232 145 if (!o)
de014da6 146 rc = 1;
fd3cf232 147 else if (o->p_in < o->buf + OBUFSZ)
148 goto noalloc;
149
150 do {
151 o = xmalloc(sizeof(obuf));
152 o->next = 0;
153 o->p_in = o->p_out = o->buf;
de014da6 154 if (q->tl)
155 q->tl->next = o;
fd3cf232 156 else
de014da6 157 q->hd = o;
158 q->tl = o;
fd3cf232 159
160 noalloc:
161 n = o->buf + OBUFSZ - o->p_in;
162 if (n > sz)
163 n = sz;
164 memcpy(o->p_in, p, n);
165 o->p_in += n;
166 p += n;
167 sz -= n;
168 } while (sz);
de014da6 169
170 return (rc);
171}
172
173/* --- @dosend@ --- *
174 *
175 * Arguemnts: @admin *a@ = pointer to an admin block
176 * @const char *p@ = pointer to buffer to write
177 * @size_t sz@ = size of data to write
178 *
179 * Returns: ---
180 *
181 * Use: Sends data to an admin client.
182 */
183
184static void dosend(admin *a, const char *p, size_t sz)
185{
186 ssize_t n;
187
188 if (a->f & AF_DEAD)
189 return;
190 if (!a->out.hd) {
191 if ((n = trywrite(a, p, sz)) < 0)
192 return;
193 p += n;
194 sz -= n;
195 if (!sz)
196 return;
197 }
198 if (doqueue(&a->out, p, sz))
199 sel_addfile(&a->w);
fd3cf232 200}
201
202/* --- @a_flush@ --- *
203 *
204 * Arguments: @int fd@ = file descriptor
205 * @unsigned mode@ = what's happening
206 * @void *v@ = pointer to my admin block
207 *
208 * Returns: ---
209 *
210 * Use: Flushes buffers when a client is ready to read again.
211 */
212
213static void a_flush(int fd, unsigned mode, void *v)
214{
215 admin *a = v;
216 obuf *o, *oo;
217 ssize_t n;
218
de014da6 219 o = a->out.hd;
fd3cf232 220 while (o) {
221 if ((n = trywrite(a, o->p_out, o->p_in - o->p_out)) < 0)
222 return;
223 o->p_out += n;
224 if (o->p_in < o->p_out)
225 break;
226 oo = o;
227 o = o->next;
228 xfree(oo);
229 }
de014da6 230 a->out.hd = o;
fd3cf232 231 if (!o) {
de014da6 232 a->out.tl = 0;
fd3cf232 233 sel_rmfile(&a->w);
234 }
235}
236
410c8acf 237/*----- Utility functions -------------------------------------------------*/
238
f43df819
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239/* --- @a_vformat@ --- *
240 *
241 * Arguments: @dstr *d@ = where to leave the formatted message
242 * @const char *fmt@ = pointer to format string
b730d38c 243 * @va_list *ap@ = arguments in list
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244 *
245 * Returns: ---
246 *
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247 * Use: Main message token formatting driver. The arguments are
248 * interleaved formatting tokens and their parameters, finally
249 * terminated by an entry @A_END@.
250 *
251 * Tokens recognized:
252 *
253 * * "*..." ... -- pretokenized @dstr_putf@-like string
254 *
255 * * "?ADDR" SOCKADDR -- a socket address, to be converted
256 *
257 * * "?B64" BUFFER SIZE -- binary data to be base64-encoded
258 *
259 * * "?TOKENS" VECTOR -- null-terminated vector of tokens
260 *
261 * * "?PEER" PEER -- peer's name
262 *
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263 * * "?ERR" CODE -- system error code
264 *
265 * * "?ERRNO" -- system error code from @errno@
7f73baaf
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266 *
267 * * "[!]..." ... -- @dstr_putf@-like string as single token
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268 */
269
b730d38c 270void a_vformat(dstr *d, const char *fmt, va_list *ap)
f43df819
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271{
272 dstr dd = DSTR_INIT;
273
274 while (fmt) {
275 if (*fmt == '*') {
6ebbf072 276 if (d->len) dstr_putc(d, ' ');
b730d38c 277 dstr_vputf(d, fmt + 1, ap);
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278 } else if (*fmt == '?') {
279 if (strcmp(fmt, "?ADDR") == 0) {
844abf94 280 const addr *a = va_arg(*ap, const addr *);
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281 char name[NI_MAXHOST], serv[NI_MAXSERV];
282 int ix, err;
283 if ((err = getnameinfo(&a->sa, addrsz(a),
284 name, sizeof(name), serv, sizeof(serv),
285 (NI_NUMERICHOST | NI_NUMERICSERV |
286 NI_DGRAM)))) {
287 dstr_putf(d, " E%d", err);
288 u_quotify(d, gai_strerror(err));
289 } else {
290 ix = afix(a->sa.sa_family); assert(ix >= 0);
291 u_quotify(d, aftab[ix].name);
292 u_quotify(d, name);
293 u_quotify(d, serv);
f43df819
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294 }
295 } else if (strcmp(fmt, "?B64") == 0) {
844abf94
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296 const octet *p = va_arg(*ap, const octet *);
297 size_t n = va_arg(*ap, size_t);
37d4c59e 298 codec *b64 = base64_class.encoder(CDCF_NOEQPAD, "", 0);
f43df819 299 dstr_putc(d, ' ');
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MW
300 b64->ops->code(b64, p, n, d);
301 b64->ops->code(b64, 0, 0, d);
302 b64->ops->destroy(b64);
3331936b 303 } else if (strcmp(fmt, "?TOKENS") == 0) {
844abf94 304 const char *const *av = va_arg(*ap, const char *const *);
0ed0735f 305 while (*av) u_quotify(d, *av++);
f43df819 306 } else if (strcmp(fmt, "?PEER") == 0)
844abf94 307 u_quotify(d, p_name(va_arg(*ap, peer *)));
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308 else if (strcmp(fmt, "?ERR") == 0) {
309 int e = va_arg(*ap, int);
310 dstr_putf(d, " E%d", e);
311 u_quotify(d, strerror(e));
312 } else if (strcmp(fmt, "?ERRNO") == 0) {
f43df819 313 dstr_putf(d, " E%d", errno);
0ed0735f 314 u_quotify(d, strerror(errno));
f43df819
MW
315 } else
316 abort();
317 } else {
318 if (*fmt == '!') fmt++;
319 DRESET(&dd);
b730d38c 320 dstr_vputf(&dd, fmt, ap);
0ed0735f 321 u_quotify(d, dd.buf);
f43df819 322 }
844abf94 323 fmt = va_arg(*ap, const char *);
f43df819 324 }
918a33b7 325 dstr_putz(d);
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326
327 dstr_destroy(&dd);
328}
329
f241e36c
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330/* --- @a_format@ --- *
331 *
332 * Arguments: @dstr *d@ = where to leave the formatted message
333 * @const char *fmt@ = pointer to format string
334 *
335 * Returns: ---
336 *
337 * Use: Writes a tokenized message into a string, for later
338 * presentation.
339 */
340
341void a_format(dstr *d, const char *fmt, ...)
342{
343 va_list ap;
344
345 va_start(ap, fmt);
b730d38c 346 a_vformat(d, fmt, &ap);
f241e36c
MW
347 va_end(ap);
348}
349
3cdc3f3a 350/* --- @a_write@, @a_vwrite@ --- *
410c8acf 351 *
352 * Arguments: @admin *a@ = admin connection to write to
de014da6 353 * @const char *status@ = status code to report
354 * @const char *tag@ = tag string, or null
410c8acf 355 * @const char *fmt@ = pointer to format string
844abf94 356 * @va_list *ap@ = arguments in list
410c8acf 357 * @...@ = other arguments
358 *
359 * Returns: ---
360 *
361 * Use: Sends a message to an admin connection.
362 */
363
de014da6 364static void a_vwrite(admin *a, const char *status, const char *tag,
b730d38c 365 const char *fmt, va_list *ap)
410c8acf 366{
410c8acf 367 dstr d = DSTR_INIT;
f98df549 368
de014da6 369 if (tag) dstr_puts(&d, "BG");
370 dstr_puts(&d, status);
0ed0735f 371 if (tag) u_quotify(&d, tag);
f43df819 372 a_vformat(&d, fmt, ap);
3cdc3f3a 373 dstr_putc(&d, '\n');
374 dosend(a, d.buf, d.len);
375 dstr_destroy(&d);
376}
377
de014da6 378static void a_write(admin *a, const char *status, const char *tag,
379 const char *fmt, ...)
3cdc3f3a 380{
381 va_list ap;
f98df549 382
410c8acf 383 va_start(ap, fmt);
b730d38c 384 a_vwrite(a, status, tag, fmt, &ap);
410c8acf 385 va_end(ap);
3cdc3f3a 386}
387
fe182f61 388/* --- @a_ok@, @a_fail@ --- *
3cdc3f3a 389 *
390 * Arguments: @admin *a@ = connection
391 * @const char *fmt@ = format string
392 * @...@ = other arguments
393 *
394 * Returns: ---
395 *
396 * Use: Convenience functions for @a_write@.
397 */
398
f43df819 399static void a_ok(admin *a) { a_write(a, "OK", 0, A_END); }
3cdc3f3a 400
fe182f61 401static void a_fail(admin *a, const char *fmt, ...)
3cdc3f3a 402{
403 va_list ap;
f98df549 404
3cdc3f3a 405 va_start(ap, fmt);
fe182f61 406 a_vwrite(a, "FAIL", 0, fmt, &ap);
3cdc3f3a 407 va_end(ap);
408}
409
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410/* --- @a_info@ --- *
411 *
412 * Arguments: @admin *a@ = connection
413 * @const char *fmt@ = format string
414 * @...@ = other arguments
415 *
416 * Returns: ---
417 *
418 * Use: Report information to an admin client.
419 */
420
421void a_info(admin *a, const char *fmt, ...)
3cdc3f3a 422{
423 va_list ap;
f98df549 424
3cdc3f3a 425 va_start(ap, fmt);
fe182f61 426 a_vwrite(a, "INFO", 0, fmt, &ap);
3cdc3f3a 427 va_end(ap);
428}
429
430/* --- @a_alert@, @a_valert@, @a_rawalert@ --- *
431 *
432 * Arguments: @unsigned f_and, f_eq@ = filter for connections
de014da6 433 * @const char *status@ = status string
3cdc3f3a 434 * @const char *fmt@ = pointer to format string
de014da6 435 * @const char *p@ = pointer to raw string
3cdc3f3a 436 * @size_t sz@ = size of raw string
844abf94 437 * @va_list *ap@ = arguments in list
3cdc3f3a 438 * @...@ = other arguments
439 *
440 * Returns: ---
441 *
442 * Use: Write a message to all admin connections matched by the given
443 * filter.
444 */
445
de014da6 446static void a_rawalert(unsigned f_and, unsigned f_eq, const char *status,
3cdc3f3a 447 const char *p, size_t sz)
448{
449 admin *a, *aa;
450 dstr d = DSTR_INIT;
e04c2d50 451
3cdc3f3a 452 if (!(flags & F_INIT))
453 return;
de014da6 454 dstr_puts(&d, status);
455 if (p) {
456 dstr_putc(&d, ' ');
3cdc3f3a 457 dstr_putm(&d, p, sz);
de014da6 458 }
3cdc3f3a 459 dstr_putc(&d, '\n');
460 p = d.buf;
461 sz = d.len;
462 for (a = admins; a; a = aa) {
463 aa = a->next;
464 if ((a->f & f_and) == f_eq)
465 dosend(a, d.buf, d.len);
466 }
410c8acf 467 dstr_destroy(&d);
468}
469
b9adb829 470static void a_valert(unsigned f_and, unsigned f_eq, const char *status,
b730d38c 471 const char *fmt, va_list *ap)
3cdc3f3a 472{
473 dstr d = DSTR_INIT;
474
475 if (!(flags & F_INIT))
476 return;
f43df819 477 a_vformat(&d, fmt, ap);
b9adb829 478 a_rawalert(f_and, f_eq, status, fmt ? d.buf : 0, fmt ? d.len : 0);
3cdc3f3a 479 dstr_destroy(&d);
480}
481
b9adb829 482static void a_alert(unsigned f_and, unsigned f_eq, const char *status,
3cdc3f3a 483 const char *fmt, ...)
484{
485 va_list ap;
f98df549 486
3cdc3f3a 487 va_start(ap, fmt);
b730d38c 488 a_valert(f_and, f_eq, status, fmt, &ap);
3cdc3f3a 489 va_end(ap);
490}
3cdc3f3a 491
410c8acf 492/* --- @a_warn@ --- *
493 *
494 * Arguments: @const char *fmt@ = pointer to format string
495 * @...@ = other arguments
496 *
497 * Returns: ---
498 *
499 * Use: Informs all admin connections of a warning.
500 */
501
502void a_warn(const char *fmt, ...)
503{
504 va_list ap;
410c8acf 505
410c8acf 506 va_start(ap, fmt);
3cdc3f3a 507 if (flags & F_INIT)
b730d38c 508 a_valert(0, 0, "WARN", fmt, &ap);
410c8acf 509 else {
f43df819 510 dstr d = DSTR_INIT;
3cdc3f3a 511 fprintf(stderr, "%s: ", QUIS);
b730d38c 512 a_vformat(&d, fmt, &ap);
f43df819
MW
513 dstr_putc(&d, '\n');
514 dstr_write(&d, stderr);
515 dstr_destroy(&d);
410c8acf 516 }
3cdc3f3a 517 va_end(ap);
410c8acf 518}
519
520/* --- @a_trace@ --- *
521 *
522 * Arguments: @const char *p@ = pointer to a buffer
523 * @size_t sz@ = size of the buffer
524 * @void *v@ = uninteresting pointer
525 *
526 * Returns: ---
527 *
3cdc3f3a 528 * Use: Custom trace output handler. Sends trace messages to
529 * interested admin connections.
410c8acf 530 */
531
532#ifndef NTRACE
533static void a_trace(const char *p, size_t sz, void *v)
de014da6 534 { a_rawalert(AF_TRACE, AF_TRACE, "TRACE", p, sz); }
410c8acf 535#endif
536
3cdc3f3a 537/* --- @a_notify@ --- *
538 *
539 * Arguments: @const char *fmt@ = pointer to format string
540 * @...@ = other arguments
541 *
542 * Returns: ---
543 *
544 * Use: Sends a notification to interested admin connections.
545 */
546
547void a_notify(const char *fmt, ...)
548{
549 va_list ap;
550
551 va_start(ap, fmt);
b730d38c 552 a_valert(AF_NOTE, AF_NOTE, "NOTE", fmt, &ap);
3cdc3f3a 553 va_end(ap);
554}
555
410c8acf 556/* --- @a_quit@ --- *
557 *
558 * Arguments: ---
559 *
560 * Returns: ---
561 *
562 * Use: Shuts things down nicely.
563 */
564
565void a_quit(void)
566{
567 close(sock.fd);
7737eb87 568 if (sockname) unlink(sockname);
067aa5f0 569 FOREACH_PEER(p, { p_destroy(p, 1); });
388e0319 570 ps_quit();
410c8acf 571 exit(0);
572}
573
574/* --- @a_sigdie@ --- *
575 *
576 * Arguments: @int sig@ = signal number
577 * @void *v@ = an uninteresting argument
578 *
579 * Returns: ---
580 *
581 * Use Shuts down on receipt of a fatal signal.
582 */
583
584static void a_sigdie(int sig, void *v)
585{
586 char *p;
587 char buf[20];
588
589 switch (sig) {
590 case SIGTERM: p = "SIGTERM"; break;
591 case SIGINT: p = "SIGINT"; break;
592 default:
3cdc3f3a 593 sprintf(buf, "%i", sig);
410c8acf 594 p = buf;
595 break;
596 }
f43df819 597 a_warn("SERVER", "quit", "signal", "%s", p, A_END);
410c8acf 598 a_quit();
599}
600
601/* --- @a_sighup@ --- *
602 *
603 * Arguments: @int sig@ = signal number
604 * @void *v@ = an uninteresting argument
605 *
606 * Returns: ---
607 *
608 * Use Logs a message about SIGHUP not being useful.
609 */
610
611static void a_sighup(int sig, void *v)
f98df549 612 { a_warn("SERVER", "ignore", "signal", "SIGHUP", A_END); }
410c8acf 613
0ba8de86 614/* --- @a_parsetime@ --- *
615 *
616 * Arguments; @const char *p@ = time string to parse
617 *
618 * Returns: Time in seconds, or @< 0@ on error.
619 */
620
621static long a_parsetime(const char *p)
622{
623 char *q;
624 long t = strtol(p, &q, 0);
625
626 switch (*q) {
627 case 'd': t *= 24;
628 case 'h': t *= 60;
629 case 'm': t *= 60;
630 case 's': if (q[1] != 0)
e04c2d50 631 default: t = -1;
0ba8de86 632 case 0: break;
633 }
e04c2d50 634 return (t);
0ba8de86 635}
636
37941236 637/* --- @a_findpeer@ --- *
638 *
639 * Arguments: @admin *a@ = admin connection
640 * @const char *pn@ = peer name
641 *
642 * Returns: The peer, or null if not there.
643 *
644 * Use: Finds a peer, reporting an error if it failed.
645 */
646
647static peer *a_findpeer(admin *a, const char *pn)
648{
649 peer *p;
650
651 if ((p = p_find(pn)) == 0)
f43df819 652 a_fail(a, "unknown-peer", "%s", pn, A_END);
37941236 653 return (p);
654}
655
de014da6 656/*----- Backgrounded operations -------------------------------------------*/
657
060ca767 658#define BGTAG(bg) \
659 (((admin_bgop *)(bg))->tag ? ((admin_bgop *)(bg))->tag : "<foreground>")
660
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661/* --- @a_bgfind@ --- *
662 *
663 * Arguments: @admin *a@ = a client block
664 * @const char *tag@ = the requested tag
665 *
666 * Returns: The requested background job, or null.
667 */
668
669static admin_bgop *a_bgfind(admin *a, const char *tag)
670{
671 admin_bgop *bg;
672
673 for (bg = a->bg; bg; bg = bg->next) {
674 if (bg->tag && strcmp(tag, bg->tag) == 0)
675 return (bg);
676 }
677 return (0);
678}
679
de014da6 680/* --- @a_bgrelease@ --- *
681 *
682 * Arguments: @admin_bgop *bg@ = backgrounded operation
683 *
684 * Returns: ---
685 *
686 * Use: Removes a backgrounded operation from the queue, since
687 * (presumably) it's done.
688 */
689
690static void a_bgrelease(admin_bgop *bg)
691{
692 admin *a = bg->a;
693
060ca767 694 T( trace(T_ADMIN, "admin: release bgop %s", BGTAG(bg)); )
695 if (bg->tag) xfree(bg->tag);
696 else selbuf_enable(&a->b);
697 if (bg->next) bg->next->prev = bg->prev;
698 if (bg->prev) bg->prev->next = bg->next;
699 else a->bg = bg->next;
de014da6 700 xfree(bg);
547a9c13 701 if (!a->bg && (a->f & AF_CLOSE)) a_destroy(a);
de014da6 702}
703
704/* --- @a_bgok@, @a_bginfo@, @a_bgfail@ --- *
705 *
706 * Arguments: @admin_bgop *bg@ = backgrounded operation
707 * @const char *fmt@ = format string
708 * @...@ = other arguments
709 *
710 * Returns: ---
711 *
712 * Use: Convenience functions for @a_write@.
713 */
714
715static void a_bgok(admin_bgop *bg)
f43df819 716 { a_write(bg->a, "OK", bg->tag, A_END); }
de014da6 717
718static void a_bginfo(admin_bgop *bg, const char *fmt, ...)
719{
720 va_list ap;
721 va_start(ap, fmt);
b730d38c 722 a_vwrite(bg->a, "INFO", bg->tag, fmt, &ap);
de014da6 723 va_end(ap);
724}
725
726static void a_bgfail(admin_bgop *bg, const char *fmt, ...)
727{
728 va_list ap;
729 va_start(ap, fmt);
b730d38c 730 a_vwrite(bg->a, "FAIL", bg->tag, fmt, &ap);
de014da6 731 va_end(ap);
732}
733
734/* --- @a_bgadd@ --- *
735 *
736 * Arguments: @admin *a@ = administration connection
737 * @admin_bgop *bg@ = pointer to background operation
738 * @const char *tag@ = background tag, or null for foreground
739 * @void (*cancel)(admin_bgop *)@ = cancel function
740 *
ff92ffd3 741 * Returns: Zero for success, nonzero on failure.
de014da6 742 *
743 * Use: Links a background job into the list.
744 */
745
ff92ffd3
MW
746static int a_bgadd(admin *a, admin_bgop *bg, const char *tag,
747 void (*cancel)(admin_bgop *))
de014da6 748{
ff92ffd3
MW
749 if (tag) {
750 if (a_bgfind(a, tag)) {
751 a_fail(a, "tag-exists", "%s", tag, A_END);
752 return (-1);
753 }
de014da6 754 bg->tag = xstrdup(tag);
ff92ffd3 755 }
de014da6 756 else {
757 bg->tag = 0;
758 selbuf_disable(&a->b);
759 }
760 bg->a = a;
761 bg->cancel = cancel;
762 bg->next = a->bg;
763 bg->prev = 0;
060ca767 764 if (a->bg) a->bg->prev = bg;
de014da6 765 a->bg = bg;
060ca767 766 T( trace(T_ADMIN, "admin: add bgop %s", BGTAG(bg)); )
f43df819 767 if (tag) a_write(a, "DETACH", tag, A_END);
ff92ffd3 768 return (0);
de014da6 769}
770
5d46c0f8
MW
771/*----- Job table manipulation --------------------------------------------*/
772
773#define JOB_SHIFT 16
774#define JOB_INDEXMASK ((1ul << JOB_SHIFT) - 1)
775#define JOB_SEQMASK ((1ul << (32 - JOB_SHIFT)) - 1)
776
777#define JOB_END 0xfffffffful
778
779static unsigned long a_joboffset;
780
781/* --- @a_jobidencode@ --- *
782 *
783 * Arguments: @admin_svcop *svc@ = pointer to a service operation
784 *
785 * Returns: A jobid for this job, in an internal static buffer.
786 *
787 * Use: Constructs a jobid. In order to dissuade people from
788 * predicting jobids, we obfuscate them.
789 *
790 * A `raw' jobid consists of two 16-bit fields. The low 16 bits
791 * are an index into a big array. The high 16 bits are a
792 * sequence number recording how many times that slot has been
793 * reused.
794 *
795 * This `raw' jobid is then obfuscated by adding a randomly-
796 * generated offset, and multiplying (mod %$2^{32}$%) by a fixed
797 * odd constant.
798 */
799
800static const char *a_jobidencode(admin_svcop *svc)
801{
802 admin_jobtable *j = &svc->prov->j;
803 static char buf[10];
804 unsigned long pre;
805 unsigned seq;
806
807 assert(svc->index <= JOB_INDEXMASK);
808 seq = j->v[svc->index].seq;
809 assert(seq <= JOB_SEQMASK);
810 pre = (unsigned long)svc->index | ((unsigned long)seq << JOB_SHIFT);
811 sprintf(buf, "J%08lx", ((pre + a_joboffset) * 0x0f87a7a3ul) & 0xffffffff);
812 return (buf);
813}
814
815/* --- @a_jobiddecode@ --- *
816 *
817 * Arguments: @admin_jobtable *j@ = pointer to a job table
818 * @const char *jid@ = pointer to a jobid string
819 *
820 * Returns: A pointer to the job's @svcop@ structure.
821 */
822
823static admin_svcop *a_jobiddecode(admin_jobtable *j, const char *jid)
824{
825 unsigned i;
826 unsigned long pre;
827
828 if (jid[0] != 'J')
829 return (0);
830 for (i = 1; i < 9; i++) {
831 if (!isxdigit((unsigned char)jid[i]))
832 return (0);
833 }
834 if (jid[9] != 0)
835 return (0);
836 pre = strtoul(jid + 1, 0, 16);
837 pre = ((pre * 0xbd11c40bul) - a_joboffset) & 0xffffffff;
838 i = pre & JOB_INDEXMASK;
839 if (i >= j->n || j->v[i].seq != (pre >> JOB_SHIFT))
840 return (0);
841 return (j->v[i].u.op);
842}
843
844/* --- @a_jobcreate@ --- *
845 *
846 * Arguments: @admin *a@ = pointer to administration client
847 *
848 * Returns: A pointer to a freshly-allocated @svcop@, or null.
849 *
850 * Use: Allocates a fresh @svcop@ and links it into a job table.
851 */
852
853static admin_svcop *a_jobcreate(admin *a)
854{
855 admin_svcop *svc;
856 unsigned i;
857 unsigned sz;
858 admin_jobtable *j = &a->j;
859
860 if (j->free != JOB_END) {
861 i = j->free;
862 j->free = j->v[i].u.next;
863 } else {
864 if (j->n == j->sz) {
865 if (j->sz > JOB_INDEXMASK)
866 return (0);
867 sz = j->sz;
868 if (!sz) {
869 j->sz = 16;
870 j->v = xmalloc(j->sz * sizeof(*j->v));
871 } else {
872 j->sz = sz << 1;
873 j->v = xrealloc(j->v, j->sz * sizeof(*j->v), sz * sizeof(*j->v));
874 }
875 }
876 i = j->n++;
877 j->v[i].seq = 0;
878 }
879 svc = xmalloc(sizeof(*svc));
880 svc->index = i;
881 svc->prov = a;
882 svc->next = j->active;
883 svc->prev = 0;
884 if (j->active) j->active->prev = svc;
885 j->active = svc;
886 j->v[i].u.op = svc;
887 IF_TRACING(T_ADMIN, {
888 trace(T_ADMIN, "admin: created job %s (%u)", a_jobidencode(svc), i);
889 })
890 return (svc);
891}
892
893/* --- @a_jobdestroy@ --- *
894 *
895 * Arguments: @admin_svcop *svc@ = pointer to job block
896 *
897 * Returns: ---
898 *
899 * Use: Frees up a completed (or cancelled) job.
900 */
901
902static void a_jobdestroy(admin_svcop *svc)
903{
904 admin *a = svc->prov;
905 admin_jobtable *j = &a->j;
906 unsigned i = svc->index;
907
908 IF_TRACING(T_ADMIN, {
909 trace(T_ADMIN, "admin: destroying job %s (%u)", a_jobidencode(svc), i);
910 })
911 assert(j->v[i].u.op = svc);
912 j->v[i].u.next = j->free;
913 j->v[i].seq++;
914 j->free = i;
915 if (svc->next) svc->next->prev = svc->prev;
916 if (svc->prev) svc->prev->next = svc->next;
917 else j->active = svc->next;
918}
919
920/* --- @a_jobtableinit@ --- *
921 *
922 * Arguments: @admin_jobtable *j@ = pointer to job table
923 *
924 * Returns: ---
925 *
926 * Use: Initializes a job table.
927 */
928
929static void a_jobtableinit(admin_jobtable *j)
930{
931 if (!a_joboffset)
932 a_joboffset = GR_RANGE(&rand_global, 0xffffffff) + 1;
933 j->n = j->sz = 0;
934 j->active = 0;
935 j->free = JOB_END;
936 j->v = 0;
937}
938
939/* --- @a_jobtablefinal@ --- *
940 *
941 * Arguments: @admin_jobtable *j@ = pointer to job table
942 *
943 * Returns: ---
944 *
945 * Use: Closes down a job table.
946 */
947
948static void a_jobtablefinal(admin_jobtable *j)
949{
950 admin_svcop *svc, *ssvc;
951
952 for (svc = j->active; svc; svc = ssvc) {
953 ssvc = svc->next;
954 a_bgfail(&svc->bg, "provider-failed", A_END);
955 a_bgrelease(&svc->bg);
956 }
957 if (j->v) xfree(j->v);
958}
959
be6a1b7a
MW
960/*----- Services infrastructure -------------------------------------------*/
961
962/* --- @a_svcfind@ --- *
963 *
964 * Arguments: @admin *a@ = the requesting client
965 * @const char *name@ = service name wanted
966 *
967 * Returns: The service requested, or null.
968 *
969 * Use: Finds a service; reports an error if the service couldn't be
970 * found.
971 */
972
973static admin_service *a_svcfind(admin *a, const char *name)
974{
975 admin_service *svc;
976
977 if ((svc = sym_find(&a_svcs, name, -1, 0, 0)) == 0) {
978 a_fail(a, "unknown-service", "%s", name, A_END);
979 return (0);
980 }
981 return (svc);
982}
983
984/* --- @a_svcunlink@ --- *
985 *
986 * Arguments: @admin_service *svc@ = pointer to service structure
987 *
988 * Returns: ---
989 *
990 * Use: Unlinks the service from its provider, without issuing a
991 * message or freeing the structure. The version string is
992 * freed, however.
993 */
994
995static void a_svcunlink(admin_service *svc)
996{
997 if (svc->next)
998 svc->next->prev = svc->prev;
999 if (svc->prev)
1000 svc->prev->next = svc->next;
1001 else
1002 svc->prov->svcs = svc->next;
1003 xfree(svc->version);
1004}
1005
1006/* --- @a_svcrelease@ --- *
1007 *
1008 * Arguments: @admin_service *svc@ = pointer to service structure
1009 *
1010 * Returns: ---
1011 *
1012 * Use: Releases a service and frees its structure.
1013 */
1014
1015static void a_svcrelease(admin_service *svc)
1016{
1017 a_notify("SVCRELEASE", "%s", SYM_NAME(svc), A_END);
1018 a_svcunlink(svc);
1019 sym_remove(&a_svcs, svc);
de014da6 1020}
1021
37941236 1022/*----- Name resolution operations ----------------------------------------*/
de014da6 1023
971e5689
MW
1024#ifdef HAVE_LIBADNS
1025
1026/* --- @before_select@ --- *
1027 *
1028 * Arguments: @sel_state *s@ = the @sel@ multiplexor (unused)
1029 * @sel_args *a@ = input to @select@, to be updated
1030 * @void *p@ = a context pointer (unused)
1031 *
1032 * Returns: ---
1033 *
1034 * Use: An I/O multiplexor hook, called just before waiting for I/O
1035 * events.
1036 *
1037 * Currently its main purpose is to wire ADNS into the event
1038 * loop.
1039 */
1040
1041static void before_select(sel_state *s, sel_args *a, void *p)
1042{
1043 struct timeval now;
1044 adns_query q;
1045 adns_answer *n;
1046 admin_resop *r;
1047 int any = 0;
1048
1049 /* --- Check for name-resolution progress --- *
1050 *
1051 * If there is any, then clobber the timeout: one of the resolver
1052 * callbacks might have renewed its interest in a file descriptor, but too
1053 * late to affect this @select@ call.
1054 *
1055 * I think, strictly, this is an mLib bug, but it's cheap enough to hack
1056 * around here. Fixing it will wait for mLib 3.
1057 */
1058
1059 for (;;) {
1060 q = 0;
1061 if (adns_check(ads, &q, &n, &p)) break;
1062 r = p;
1063 any = 1;
1064 if (n->status != adns_s_ok) {
1065 T( trace(T_ADMIN, "admin: resop %s failed: %s",
1066 BGTAG(r), adns_strerror(n->status)); )
1067 a_bgfail(&r->bg, "resolve-error", "%s", r->addr, A_END);
1068 r->func(r, ARES_FAIL);
1069 } else {
1070 T( trace(T_ADMIN, "admin: resop %s ok", BGTAG(r)); )
1071 assert(n->type == adns_r_addr);
1072 assert(n->nrrs > 0);
1073 assert(n->rrs.addr[0].len <= sizeof(r->sa));
1074 memcpy(&r->sa, &n->rrs.addr[0].addr, n->rrs.addr[0].len);
1075 setport(&r->sa, r->port);
1076 r->func(r, ARES_OK);
1077 }
1078 free(n);
1079 sel_rmtimer(&r->t);
1080 xfree(r->addr);
1081 a_bgrelease(&r->bg);
1082 }
1083
1084 if (any) { a->tvp = &a->tv; a->tv.tv_sec = 0; a->tv.tv_usec = 0; }
1085
1086 gettimeofday(&now, 0);
1087 adns_beforeselect(ads, &a->maxfd,
1088 &a->fd[SEL_READ], &a->fd[SEL_WRITE], &a->fd[SEL_EXC],
1089 &a->tvp, &a->tv, &now);
1090}
1091
1092/* --- @after_select@ --- *
1093 *
1094 * Arguments: @sel_state *s@ = the @sel@ multiplexor (unused)
1095 * @sel_args *a@ = input to @select@, to be updated
1096 * @void *p@ = a context pointer (unused)
1097 *
1098 * Returns: ---
1099 *
1100 * Use: An I/O multiplexor hook, called just after waiting for I/O
1101 * events.
1102 *
1103 * Currently its main purpose is to wire ADNS into the event
1104 * loop.
1105 */
1106
1107static void after_select(sel_state *s, sel_args *a, void *p)
1108{
1109 struct timeval now;
1110
1111 gettimeofday(&now, 0);
1112 adns_afterselect(ads, a->maxfd,
1113 &a->fd[SEL_READ], &a->fd[SEL_WRITE], &a->fd[SEL_EXC],
1114 &now);
1115}
1116
1117#else
1118
37941236 1119/* --- @a_resolved@ --- *
de014da6 1120 *
37941236 1121 * Arguments: @struct hostent *h@ = pointer to resolved hostname
1122 * @void *v@ = pointer to resolver operation
de014da6 1123 *
1124 * Returns: ---
1125 *
37941236 1126 * Use: Handles a completed name resolution.
de014da6 1127 */
1128
37941236 1129static void a_resolved(struct hostent *h, void *v)
de014da6 1130{
37941236 1131 admin_resop *r = v;
1132
f4c9c08f 1133 QUICKRAND;
37941236 1134 if (!h) {
813d2de9
MW
1135 T( trace(T_ADMIN, "admin: resop %s failed: %s",
1136 BGTAG(r), hstrerror(h_errno)); )
f43df819 1137 a_bgfail(&r->bg, "resolve-error", "%s", r->addr, A_END);
37941236 1138 r->func(r, ARES_FAIL);
1139 } else {
813d2de9 1140 T( trace(T_ADMIN, "admin: resop %s ok", BGTAG(r)); )
8d513103 1141 r->sa.sin.sin_family = AF_INET;
37941236 1142 memcpy(&r->sa.sin.sin_addr, h->h_addr, sizeof(struct in_addr));
d98625f4 1143 setport(&r->sa, r->port);
37941236 1144 r->func(r, ARES_OK);
1145 }
1146 sel_rmtimer(&r->t);
1147 xfree(r->addr);
1148 a_bgrelease(&r->bg);
e04c2d50 1149}
de014da6 1150
971e5689
MW
1151#endif
1152
37941236 1153/* --- @a_restimer@ --- *
de014da6 1154 *
37941236 1155 * Arguments: @struct timeval *tv@ = timer
1156 * @void *v@ = pointer to resolver operation
de014da6 1157 *
1158 * Returns: ---
1159 *
37941236 1160 * Use: Times out a resolver.
de014da6 1161 */
1162
37941236 1163static void a_restimer(struct timeval *tv, void *v)
de014da6 1164{
37941236 1165 admin_resop *r = v;
1166
1167 T( trace(T_ADMIN, "admin: resop %s timeout", BGTAG(r)); )
f43df819 1168 a_bgfail(&r->bg, "resolver-timeout", "%s", r->addr, A_END);
37941236 1169 r->func(r, ARES_FAIL);
971e5689
MW
1170#ifdef HAVE_LIBADNS
1171 adns_cancel(r->q);
1172#else
37941236 1173 bres_abort(&r->r);
971e5689 1174#endif
37941236 1175 xfree(r->addr);
1176 a_bgrelease(&r->bg);
de014da6 1177}
1178
37941236 1179/* --- @a_rescancel@ --- *
de014da6 1180 *
37941236 1181 * Arguments: @admin_bgop *bg@ = background operation
de014da6 1182 *
1183 * Returns: ---
1184 *
37941236 1185 * Use: Cancels an add operation.
de014da6 1186 */
1187
37941236 1188static void a_rescancel(admin_bgop *bg)
de014da6 1189{
37941236 1190 admin_resop *r = (admin_resop *)bg;
1191
1192 T( trace(T_ADMIN, "admin: cancel resop %s", BGTAG(r)); )
1193 r->func(r, ARES_FAIL);
1194 sel_rmtimer(&r->t);
1195 xfree(r->addr);
971e5689
MW
1196#ifdef HAVE_LIBADNS
1197 adns_cancel(r->q);
1198#else
37941236 1199 bres_abort(&r->r);
971e5689 1200#endif
de014da6 1201}
37941236 1202
1203/* --- @a_resolve@ --- *
410c8acf 1204 *
37941236 1205 * Arguments: @admin *a@ = administration connection
1206 * @admin_resop *r@ = resolver operation to run
1207 * @const char *tag@ = background operation tag
1208 * @void (*func)(struct admin_resop *, int@ = handler function
1209 * @unsigned ac@ = number of remaining arguments
1210 * @char *av[]@ = pointer to remaining arguments
410c8acf 1211 *
1212 * Returns: ---
1213 *
37941236 1214 * Use: Cranks up a resolver job.
410c8acf 1215 */
1216
37941236 1217static void a_resolve(admin *a, admin_resop *r, const char *tag,
1218 void (*func)(struct admin_resop *, int),
1219 unsigned ac, char *av[])
410c8acf 1220{
37941236 1221 struct timeval tv;
1222 unsigned long pt;
870ff51a
MW
1223 int af = AF_UNSPEC;
1224 const char *fam = "ANY";
37941236 1225 char *p;
870ff51a 1226 int i = 0, j;
89640f3f 1227 struct addrinfo *ai, *ailist, aihint = { 0 };
971e5689
MW
1228#ifdef HAVE_LIBADNS
1229 int err;
1230 adns_queryflags qf;
1231#endif
fd3cf232 1232
37941236 1233 /* --- Fill in the easy bits of address --- */
1234
452bf3f6 1235 r->bg.tag = "<starting>";
37941236 1236 r->addr = 0;
1237 r->func = func;
870ff51a
MW
1238 if (mystrieq(av[i], "any"))
1239 { fam = "ANY"; af = AF_UNSPEC; i++; }
1240 else for (j = 0; j < NADDRFAM; j++) {
1241 if (mystrieq(av[i], aftab[j].name)) {
063c9648 1242 if (udpsock[j].sf.fd < 0) {
a8211197
MW
1243 a_fail(a, "disabled-address-family", "%s", aftab[j].name, A_END);
1244 goto fail;
1245 }
870ff51a
MW
1246 fam = aftab[j].name;
1247 af = aftab[j].af;
1248 i++;
1249 break;
1250 }
1251 }
165efde7 1252 if (ac - i != 1 && ac - i != 2) {
870ff51a 1253 a_fail(a, "bad-addr-syntax", "[FAMILY] ADDRESS [PORT]", A_END);
37941236 1254 goto fail;
1255 }
37941236 1256 r->addr = xstrdup(av[i]);
6f88042a 1257 if (!av[i + 1])
165efde7
MW
1258 pt = TRIPE_PORT;
1259 else {
1260 pt = strtoul(av[i + 1], &p, 0);
1261 if (*p) {
1262 struct servent *s = getservbyname(av[i + 1], "udp");
1263 if (!s) {
1264 a_fail(a, "unknown-service", "%s", av[i + 1], A_END);
1265 goto fail;
1266 }
1267 pt = ntohs(s->s_port);
37941236 1268 }
410c8acf 1269 }
37941236 1270 if (pt == 0 || pt >= 65536) {
f43df819 1271 a_fail(a, "invalid-port", "%lu", pt, A_END);
37941236 1272 goto fail;
1273 }
8d513103 1274 r->port = pt;
37941236 1275
1276 /* --- Report backgrounding --- *
1277 *
1278 * Do this for consistency of interface, even if we're going to get the
1279 * answer straight away.
1280 */
1281
ff92ffd3
MW
1282 if (a_bgadd(a, &r->bg, tag, a_rescancel))
1283 goto fail;
870ff51a
MW
1284 T( trace(T_ADMIN, "admin: %u, resop %s, hostname `%s', family `%s'",
1285 a->seq, BGTAG(r), r->addr, fam); )
37941236 1286
1287 /* --- If the name is numeric, do it the easy way --- */
e04c2d50 1288
a8211197 1289 aihint.ai_family = af;
89640f3f
MW
1290 aihint.ai_socktype = SOCK_DGRAM;
1291 aihint.ai_protocol = IPPROTO_UDP;
1292 aihint.ai_flags = AI_NUMERICHOST;
1293 if (!getaddrinfo(av[i], 0, &aihint, &ailist)) {
1294 for (ai = ailist; ai; ai = ai->ai_next) {
063c9648 1295 if ((j = afix(ai->ai_family)) >= 0 && udpsock[j].sf.fd >= 0)
89640f3f
MW
1296 break;
1297 }
1298 if (!ai) {
1299 T( trace(T_ADMIN, "admin: resop %s failed: "
1300 "no suitable addresses returned", BGTAG(r)); )
1301 a_bgfail(&r->bg, "resolve-error", "%s" , r->addr, A_END);
1302 func(r, ARES_FAIL);
1303 } else {
1304 T( trace(T_ADMIN, "admin: resop %s done the easy way", BGTAG(r)); )
1305 assert(ai->ai_addrlen <= sizeof(r->sa));
1306 memcpy(&r->sa, ai->ai_addr, ai->ai_addrlen);
1307 setport(&r->sa, r->port);
1308 func(r, ARES_OK);
1309 }
1310 freeaddrinfo(ailist);
37941236 1311 xfree(r->addr);
1312 a_bgrelease(&r->bg);
1313 return;
1314 }
1315
1316 /* --- Store everything for later and crank up the resolver --- */
1317
1318 gettimeofday(&tv, 0);
1319 tv.tv_sec += T_RESOLVE;
1320 sel_addtimer(&sel, &r->t, &tv, a_restimer, r);
971e5689 1321#ifdef HAVE_LIBADNS
a8211197
MW
1322 qf = adns_qf_search;
1323 for (j = 0; j < NADDRFAM; j++) {
063c9648 1324 if ((af == AF_UNSPEC || af == aftab[i].af) && udpsock[j].sf.fd >= 0)
a8211197
MW
1325 qf |= aftab[j].qf;
1326 }
971e5689
MW
1327 if ((err = adns_submit(ads, r->addr, adns_r_addr, qf, r, &r->q)) != 0) {
1328 T( trace(T_ADMIN, "admin: resop %s adns_submit failed: %s",
1329 BGTAG(r), strerror(err)); )
1330 a_bgfail(&r->bg, "resolve-error", "%s", r->addr, A_END);
1331 goto fail_release;
1332 }
1333#else
a8211197
MW
1334 if (af != AF_UNSPEC && af != AF_INET) {
1335 T( trace(T_ADMIN, "admin: resop %s failed: unsupported address family",
1336 BGTAG(r)); )
1337 a_bgfail(&r->bg, "resolve-error", "%s", r->addr, A_END);
1338 goto fail_release;
1339 }
063c9648 1340 if (udpsock[AFIX_INET].sf.fd < 0) {
a8211197
MW
1341 a_bgfail(&r->bg, "disabled-address-family", "INET", A_END);
1342 goto fail_release;
1343 }
37941236 1344 bres_byname(&r->r, r->addr, a_resolved, r);
971e5689 1345#endif
37941236 1346 return;
1347
1348fail:
1349 func(r, ARES_FAIL);
1350 if (r->addr) xfree(r->addr);
1351 xfree(r);
870ff51a
MW
1352 return;
1353
1354fail_release:
1355 func(r, ARES_FAIL);
1356 xfree(r->addr);
1357 a_bgrelease(&r->bg);
410c8acf 1358}
1359
e7a4d919
MW
1360/*----- Option parsing ----------------------------------------------------*/
1361
1362#define OPTIONS(argc, argv, guts) do { \
1363 char **o_av = argv; \
1364 for (;; o_av++) { \
1365 if (!*o_av) \
1366 break; \
1367 if (mystrieq(*o_av, "--")) { \
1368 o_av++; \
1369 break; \
1370 } \
1371 guts \
1372 if (**o_av == '-') \
1373 goto bad_syntax; \
1374 break; \
1375 } \
1376 argc -= o_av - argv; \
1377 argv = o_av; \
1378} while (0)
1379
1380#define OPT(name, guts) if (mystrieq(*o_av, name)) { guts continue; }
1381
1382#define OPTARG(name, arg, guts) OPT(name, { \
1383 const char *arg; \
1384 arg = *++o_av; \
1385 if (!arg) goto bad_syntax; \
1386 guts \
1387})
1388
1389#define OPTTIME(name, arg, guts) OPTARG(name, o_arg, { \
1390 long arg; \
1391 if ((arg = a_parsetime(o_arg)) < 0) { \
1392 a_fail(a, "bad-time-spec", "%s", o_arg, A_END); \
1393 goto fail; \
1394 } \
1395 guts \
1396})
1397
37941236 1398/*----- Adding peers ------------------------------------------------------*/
1399
1400/* --- @a_doadd@ --- *
410c8acf 1401 *
37941236 1402 * Arguments: @admin_resop *r@ = resolver operation
1403 * @int rc@ = how it worked
410c8acf 1404 *
1405 * Returns: ---
1406 *
37941236 1407 * Use: Handles a completed resolution.
410c8acf 1408 */
1409
37941236 1410static void a_doadd(admin_resop *r, int rc)
410c8acf 1411{
37941236 1412 admin_addop *add = (admin_addop *)r;
1413
1414 T( trace(T_ADMIN, "admin: done add op %s", BGTAG(add)); )
1415
1416 if (rc == ARES_OK) {
37941236 1417 add->peer.sa = add->r.sa;
c8e02c8a
MW
1418 if (p_findbyaddr(&add->r.sa))
1419 a_bgfail(&add->r.bg, "peer-addr-exists", "?ADDR", &add->r.sa, A_END);
1420 else if (p_find(add->peer.name))
f43df819 1421 a_bgfail(&add->r.bg, "peer-exists", "%s", add->peer.name, A_END);
37941236 1422 else if (!p_create(&add->peer))
f43df819 1423 a_bgfail(&add->r.bg, "peer-create-fail", "%s", add->peer.name, A_END);
37941236 1424 else
1425 a_bgok(&add->r.bg);
1426 }
de014da6 1427
48b84569 1428 if (add->peer.tag) xfree(add->peer.tag);
71862c07 1429 if (add->peer.privtag) xfree(add->peer.privtag);
8362ac1c 1430 if (add->peer.knock) xfree(add->peer.knock);
37941236 1431 xfree(add->peer.name);
410c8acf 1432}
1433
1434/* --- @acmd_add@ --- *
1435 *
1436 * Arguments: @admin *a@ = connection which requested the addition
1437 * @unsigned ac@ = argument count
1438 * @char *av[]@ = pointer to the argument list
1439 *
1440 * Returns: ---
1441 *
1442 * Use: Adds a new peer.
1443 */
1444
1445static void acmd_add(admin *a, unsigned ac, char *av[])
1446{
de014da6 1447 const char *tag = 0;
9986f0b5 1448 admin_addop *add;
410c8acf 1449
0ba8de86 1450 /* --- Set stuff up --- */
1451
de014da6 1452 add = xmalloc(sizeof(*add));
9986f0b5 1453 add->peer.name = 0;
48b84569 1454 add->peer.tag = 0;
fe2a5dcf 1455 add->peer.privtag = 0;
8362ac1c 1456 add->peer.knock = 0;
de014da6 1457 add->peer.t_ka = 0;
1458 add->peer.tops = tun_default;
8743c776 1459 add->peer.f = 0;
37941236 1460
42da2a58 1461 /* --- Parse options --- */
1462
e7a4d919
MW
1463 OPTIONS(ac, av, {
1464 OPTARG("-background", arg, { tag = arg; })
1465 OPTARG("-tunnel", arg, {
1466 unsigned i;
1467 for (i = 0;; i++) {
1468 if (!tunnels[i]) {
1469 a_fail(a, "unknown-tunnel", "%s", arg, A_END);
37941236 1470 goto fail;
42da2a58 1471 }
e7a4d919
MW
1472 if (mystrieq(arg, tunnels[i]->name)) {
1473 add->peer.tops = tunnels[i];
42da2a58 1474 break;
1475 }
1476 }
e7a4d919
MW
1477 })
1478 OPTTIME("-keepalive", t, { add->peer.t_ka = t; })
8743c776 1479 OPT("-cork", { add->peer.f |= KXF_CORK; })
067aa5f0 1480 OPT("-ephemeral", { add->peer.f |= PSF_EPHEM; })
48b84569 1481 OPTARG("-key", arg, {
97b8d61c 1482 if (add->peer.tag) xfree(add->peer.tag);
48b84569
MW
1483 add->peer.tag = xstrdup(arg);
1484 })
067aa5f0 1485 OPT("-mobile", { add->peer.f |= PSF_MOBILE | PSF_EPHEM; })
fe2a5dcf 1486 OPTARG("-priv", arg, {
97b8d61c 1487 if (add->peer.privtag) xfree(add->peer.privtag);
fe2a5dcf
MW
1488 add->peer.privtag = xstrdup(arg);
1489 })
8362ac1c
MW
1490 OPTARG("-knock", arg, {
1491 if (add->peer.knock) xfree(add->peer.knock);
1492 add->peer.knock = xstrdup(arg);
067aa5f0 1493 add->peer.f |= PSF_EPHEM;
8362ac1c 1494 })
e7a4d919 1495 });
42da2a58 1496
9986f0b5
MW
1497 /* --- Make sure someone's not got there already --- */
1498
bcf3764a 1499 if (!av[0] || !av[1])
9986f0b5 1500 goto bad_syntax;
e7a4d919
MW
1501 if (p_find(*av)) {
1502 a_fail(a, "peer-exists", "%s", *av, A_END);
9986f0b5 1503 goto fail;
42da2a58 1504 }
e7a4d919
MW
1505 add->peer.name = xstrdup(*av++);
1506 ac--;
42da2a58 1507
37941236 1508 /* --- Crank up the resolver --- */
de014da6 1509
e7a4d919 1510 a_resolve(a, &add->r, tag, a_doadd, ac, av);
42da2a58 1511 return;
1512
37941236 1513 /* --- Clearing up --- */
1514
42da2a58 1515bad_syntax:
9986f0b5 1516 a_fail(a, "bad-syntax", "add", "[OPTIONS] PEER ADDR ...", A_END);
de014da6 1517fail:
9986f0b5 1518 if (add->peer.name) xfree(add->peer.name);
48b84569 1519 if (add->peer.tag) xfree(add->peer.tag);
fe2a5dcf 1520 if (add->peer.privtag) xfree(add->peer.privtag);
8362ac1c 1521 if (add->peer.knock) xfree(add->peer.knock);
37941236 1522 xfree(add);
0ba8de86 1523 return;
1524}
1525
1526/*----- Ping --------------------------------------------------------------*/
1527
de014da6 1528/* --- @a_pingcancel@ --- *
1529 *
1530 * Arguments: @admin_bgop *bg@ = background operation block
1531 *
1532 * Returns: ---
1533 *
1534 * Use: Cancels a running ping.
1535 */
1536
1537static void a_pingcancel(admin_bgop *bg)
1538{
1539 admin_pingop *pg = (admin_pingop *)bg;
060ca767 1540 T( trace(T_ADMIN, "admin: cancel ping op %s", BGTAG(pg)); )
de014da6 1541 p_pingdone(&pg->ping, PING_NONOTIFY);
1542}
1543
0ba8de86 1544/* --- @a_pong@ --- *
1545 *
1546 * Arguments: @int rc@ = return code
de014da6 1547 * @void *v@ = ping operation block
0ba8de86 1548 *
1549 * Returns: ---
1550 *
1551 * Use: Collects what happened to a ping message.
1552 */
1553
de014da6 1554static void a_pong(int rc, void *v)
0ba8de86 1555{
de014da6 1556 admin_pingop *pg = v;
0ba8de86 1557 struct timeval tv;
1558 double millis;
1559
0ba8de86 1560 switch (rc) {
1561 case PING_OK:
1562 gettimeofday(&tv, 0);
de014da6 1563 tv_sub(&tv, &tv, &pg->pingtime);
0ba8de86 1564 millis = (double)tv.tv_sec * 1000 + (double)tv.tv_usec/1000;
f43df819 1565 a_bginfo(&pg->bg, "ping-ok", "%.1f", millis, A_END);
de014da6 1566 a_bgok(&pg->bg);
0ba8de86 1567 break;
1568 case PING_TIMEOUT:
f43df819 1569 a_bginfo(&pg->bg, "ping-timeout", A_END);
de014da6 1570 a_bgok(&pg->bg);
0ba8de86 1571 break;
1572 case PING_PEERDIED:
f43df819 1573 a_bginfo(&pg->bg, "ping-peer-died", A_END);
de014da6 1574 a_bgok(&pg->bg);
0ba8de86 1575 break;
1576 default:
1577 abort();
1578 }
060ca767 1579 T( trace(T_ADMIN, "admin: ponged ping op %s", BGTAG(pg)); )
de014da6 1580 a_bgrelease(&pg->bg);
0ba8de86 1581}
1582
1583/* --- @acmd_ping@, @acmd_eping@ --- *
1584 *
1585 * Arguments: @admin *a@ = connection which requested the ping
1586 * @unsigned ac@ = argument count
1587 * @char *av[]@ = pointer to the argument list
1588 *
1589 * Returns: ---
1590 *
1591 * Use: Pings a peer.
1592 */
1593
1594static void a_ping(admin *a, unsigned ac, char *av[],
1595 const char *cmd, unsigned msg)
1596{
1597 long t = T_PING;
0ba8de86 1598 peer *p;
de014da6 1599 admin_pingop *pg = 0;
1600 const char *tag = 0;
0ba8de86 1601
e7a4d919
MW
1602 OPTIONS(ac, av, {
1603 OPTARG("-background", arg, { tag = arg; })
1604 OPTTIME("-timeout", arg, { t = arg; })
1605 });
1606 if (!*av || av[1]) goto bad_syntax;
1607 if ((p = a_findpeer(a, *av)) == 0)
0ba8de86 1608 return;
de014da6 1609 pg = xmalloc(sizeof(*pg));
1610 gettimeofday(&pg->pingtime, 0);
ff92ffd3
MW
1611 if (a_bgadd(a, &pg->bg, tag, a_pingcancel))
1612 goto fail;
060ca767 1613 T( trace(T_ADMIN, "admin: ping op %s: %s to %s",
1614 BGTAG(pg), cmd, p_name(p)); )
de014da6 1615 if (p_pingsend(p, &pg->ping, msg, t, a_pong, pg)) {
f43df819 1616 a_bgfail(&pg->bg, "ping-send-failed", A_END);
de014da6 1617 a_bgrelease(&pg->bg);
1618 }
0ba8de86 1619 return;
e04c2d50 1620
0ba8de86 1621bad_syntax:
f43df819 1622 a_fail(a, "bad-syntax", "%s", cmd, "[OPTIONS] PEER", cmd, A_END);
e7a4d919 1623fail:
ff92ffd3 1624 if (pg) xfree(pg);
42da2a58 1625 return;
410c8acf 1626}
1627
0ba8de86 1628static void acmd_ping(admin *a, unsigned ac, char *av[])
1629 { a_ping(a, ac, av, "ping", MISC_PING); }
1630static void acmd_eping(admin *a, unsigned ac, char *av[])
1631 { a_ping(a, ac, av, "eping", MISC_EPING); }
0ba8de86 1632
be6a1b7a
MW
1633/*----- Service commands --------------------------------------------------*/
1634
1635static void acmd_svcclaim(admin *a, unsigned ac, char *av[])
1636{
1637 admin_service *svc;
1638 unsigned f;
1639
1640 svc = sym_find(&a_svcs, av[0], -1, sizeof(*svc), &f);
1641 if (f) {
1642 if (versioncmp(av[1], svc->version) <= 0) {
1643 a_fail(a,
1644 "service-exists",
1645 "%s", SYM_NAME(svc),
1646 "%s", svc->version,
1647 A_END);
1648 return;
1649 }
1650 a_write(svc->prov, "SVCCLAIM", 0, "%s", av[0], "%s", av[1], A_END);
1651 a_svcunlink(svc);
1652 }
1653 svc->prov = a;
1654 svc->version = xstrdup(av[1]);
1655 svc->next = a->svcs;
1656 svc->prev = 0;
1657 if (a->svcs) a->svcs->prev = svc;
1658 a->svcs = svc;
1659 a_notify("SVCCLAIM", "%s", SYM_NAME(svc), "%s", svc->version, A_END);
1660 a_ok(a);
1661}
1662
1663static void acmd_svcrelease(admin *a, unsigned ac, char *av[])
1664{
1665 admin_service *svc;
1666
1667 if ((svc = a_svcfind(a, av[0])) == 0)
1668 return;
1669 if (svc->prov != a) {
1670 a_fail(a, "not-service-provider", "%s", SYM_NAME(svc), A_END);
1671 return;
1672 }
1673 a_svcrelease(svc);
1674 a_ok(a);
1675}
1676
1677static void acmd_svcensure(admin *a, unsigned ac, char *av[])
1678{
1679 admin_service *svc;
1680
1681 if ((svc = a_svcfind(a, av[0])) == 0)
1682 return;
1683 if (av[1] && versioncmp(svc->version, av[1]) < 0) {
1684 a_fail(a, "service-too-old",
1685 "%s", SYM_NAME(svc),
1686 "%s", svc->version,
1687 A_END);
1688 return;
1689 }
1690 a_ok(a);
1691}
1692
1693static void acmd_svcquery(admin *a, unsigned ac, char *av[])
1694{
1695 admin_service *svc;
1696
1697 if ((svc = a_svcfind(a, av[0])) != 0) {
1698 a_info(a, "name=%s", SYM_NAME(svc), "version=%s", svc->version, A_END);
1699 a_ok(a);
1700 }
1701}
1702
1703static void acmd_svclist(admin *a, unsigned ac, char *av[])
1704{
1705 admin_service *svc;
1706 sym_iter i;
1707
1708 for (sym_mkiter(&i, &a_svcs); (svc = sym_next(&i)) != 0; )
1709 a_info(a, "%s", SYM_NAME(svc), "%s", svc->version, A_END);
1710 a_ok(a);
1711}
1712
ef2f29c9
MW
1713static void a_canceljob(admin_bgop *bg)
1714{
1715 admin_svcop *svc = (admin_svcop *)bg;
1716
1717 a_write(svc->prov, "SVCCANCEL", 0, "%s", a_jobidencode(svc), A_END);
1718 a_jobdestroy(svc);
1719}
1720
1721static void acmd_svcsubmit(admin *a, unsigned ac, char *av[])
1722{
1723 const char *tag = 0;
1724 admin_service *svc;
1725 admin_svcop *svcop;
1726 const char *ver = 0;
1727 dstr d = DSTR_INIT;
1728
1729 OPTIONS(ac, av, {
1730 OPTARG("-background", arg, { tag = arg; })
1731 OPTARG("-version", arg, { ver = arg; })
1732 });
1733 if (!*av) goto bad_syntax;
1734 if ((svc = a_svcfind(a, *av)) == 0) goto fail;
1735 if (ver && versioncmp(svc->version, ver) < 0) {
1736 a_fail(a, "service-too-old",
1737 "%s", SYM_NAME(svc),
1738 "%s", svc->version,
1739 A_END);
1740 goto fail;
1741 }
1742 if ((svcop = a_jobcreate(svc->prov)) == 0) {
1743 a_fail(a, "provider-overloaded", A_END);
1744 goto fail;
1745 }
1746 if (a_bgadd(a, &svcop->bg, tag, a_canceljob)) {
1747 a_jobdestroy(svcop);
1748 goto fail;
1749 }
1750 a_write(svc->prov, "SVCJOB", 0,
1751 "%s", a_jobidencode(svcop),
1752 "?TOKENS", av,
1753 A_END);
1754 goto done;
1755
1756bad_syntax:
1757 a_fail(a, "bad-syntax", "svcsubmit", "[OPTIONS] SERVICE ARGS...", A_END);
1758fail:
1759done:
1760 dstr_destroy(&d);
1761 return;
1762}
1763
1764static void a_replycmd(admin *a, const char *status, int donep, char *av[])
1765{
1766 admin_svcop *svc;
1767
1768 if ((svc = a_jobiddecode(&a->j, av[0])) == 0) {
1769 a_fail(a, "unknown-jobid", av[0], A_END);
1770 return;
1771 }
1772 a_write(svc->bg.a, status, svc->bg.tag, "?TOKENS", av + 1, A_END);
1773 if (donep) {
1774 a_jobdestroy(svc);
1775 a_bgrelease(&svc->bg);
1776 }
1777 a_ok(a);
1778}
1779
1780static void acmd_svcok(admin *a, unsigned ac, char *av[])
1781 { a_replycmd(a, "OK", 1, av); }
1782static void acmd_svcinfo(admin *a, unsigned ac, char *av[])
1783 { a_replycmd(a, "INFO", 0, av); }
1784static void acmd_svcfail(admin *a, unsigned ac, char *av[])
1785 { a_replycmd(a, "FAIL", 1, av); }
1786
410c8acf 1787/*----- Administration commands -------------------------------------------*/
1788
1789/* --- Miscellaneous commands --- */
1790
3cdc3f3a 1791/* --- @traceish@ --- *
1792 *
1793 * Arguments: @admin *a@ = connection to complain on
1794 * @unsigned ac@ = number of arguments
1795 * @char *av[]@ = vector of arguments
1796 * @const char *what@ = what we're messing with
1797 * @const trace_opt *tt@ = options table
1798 * @unsigned *ff@ = where the flags are
1799 *
1800 * Returns: Nonzero if anything changed.
1801 *
1802 * Use: Guts of trace-ish commands like `trace' and `watch'.
1803 */
410c8acf 1804
3cdc3f3a 1805static int traceish(admin *a, unsigned ac, char *av[],
1806 const char *what, const trace_opt *tt, unsigned *ff)
410c8acf 1807{
3cdc3f3a 1808 int ch = 0;
1809
410c8acf 1810 if (!ac || strcmp(av[0], "?") == 0) {
1811 const trace_opt *t;
3cdc3f3a 1812 for (t = tt; t->ch; t++) {
f43df819
MW
1813 a_info(a, "*%c%c %s",
1814 t->ch, (*ff & t->f) == t->f ? '+' : ' ', t->help, A_END);
410c8acf 1815 }
1816 } else {
1817 unsigned sense = 1;
3cdc3f3a 1818 unsigned f = *ff;
1819 const trace_opt *t;
410c8acf 1820 char *p = av[0];
1821
1822 while (*p) {
1823 switch (*p) {
1824 case '+': sense = 1; break;
1825 case '-': sense = 0; break;
1826 default:
3cdc3f3a 1827 for (t = tt; t->ch; t++) {
1828 if (t->ch == *p) {
1829 if (sense) f |= t->f;
1830 else f &= ~t->f;
410c8acf 1831 goto tropt_ok;
1832 }
1833 }
f43df819 1834 a_fail(a, "bad-%s-option", what, "%c", *p, A_END);
3cdc3f3a 1835 return (0);
e04c2d50 1836 tropt_ok:;
410c8acf 1837 break;
1838 }
1839 p++;
1840 }
3cdc3f3a 1841 *ff = f;
1842 ch = 1;
410c8acf 1843 }
3cdc3f3a 1844 a_ok(a);
1845 return (ch);
1846}
1847
1848#ifndef NTRACE
1849
1850static void acmd_trace(admin *a, unsigned ac, char *av[])
1851{
1852 if (traceish(a, ac, av, "trace", tr_opts, &tr_flags))
1853 trace_level(tr_flags);
410c8acf 1854}
1855
1856#endif
1857
3cdc3f3a 1858static void acmd_watch(admin *a, unsigned ac, char *av[])
f98df549 1859 { traceish(a, ac, av, "watch", w_opts, &a->f); }
3cdc3f3a 1860
3cdc3f3a 1861static void alertcmd(admin *a, unsigned f_and, unsigned f_eq,
3331936b
MW
1862 const char *status, char *av[])
1863 { a_alert(f_and, f_eq, status, "USER", "?TOKENS", av, A_END); a_ok(a); }
3cdc3f3a 1864static void acmd_notify(admin *a, unsigned ac, char *av[])
3331936b 1865 { alertcmd(a, AF_NOTE, AF_NOTE, "NOTE", av); }
3cdc3f3a 1866static void acmd_warn(admin *a, unsigned ac, char *av[])
3331936b 1867 { alertcmd(a, AF_WARN, AF_WARN, "WARN", av); }
3cdc3f3a 1868
410c8acf 1869static void acmd_port(admin *a, unsigned ac, char *av[])
5d06f63e
MW
1870{
1871 int i;
1872
1873 if (ac) {
1874 for (i = 0; i < NADDRFAM; i++)
1875 if (mystrieq(av[0], aftab[i].name)) goto found;
1876 a_fail(a, "unknown-address-family", "%s", av[0], A_END);
1877 return;
1878 found:
063c9648 1879 if (udpsock[i].sf.fd < 0) {
971e5689
MW
1880 a_fail(a, "disabled-address-family", "%s", aftab[i].name, A_END);
1881 return;
1882 }
5d06f63e
MW
1883 } else {
1884 for (i = 0; i < NADDRFAM; i++)
063c9648 1885 if (udpsock[i].sf.fd >= 0) goto found;
5d06f63e
MW
1886 abort();
1887 }
8d4c29d2 1888 a_info(a, "%u", udpsock[i].port, A_END);
5d06f63e
MW
1889 a_ok(a);
1890}
410c8acf 1891
410c8acf 1892static void acmd_daemon(admin *a, unsigned ac, char *av[])
1893{
1894 if (flags & F_DAEMON)
f43df819 1895 a_fail(a, "already-daemon", A_END);
410c8acf 1896 else {
f43df819 1897 a_notify("DAEMON", A_END);
93bee2c4 1898 if (a_stdin)
410c8acf 1899 a_destroy(a_stdin);
19dd2531 1900 if (daemonize())
f43df819 1901 a_fail(a, "daemon-error", "?ERRNO", A_END);
93bee2c4 1902 else {
410c8acf 1903 flags |= F_DAEMON;
3cdc3f3a 1904 a_ok(a);
93bee2c4 1905 }
410c8acf 1906 }
1907}
1908
ff92ffd3
MW
1909static void acmd_jobs(admin *a, unsigned ac, char *av[])
1910{
1911 admin_bgop *bg;
1912
1913 for (bg = a->bg; bg; bg = bg->next) {
1914 assert(bg->tag);
1915 a_info(a, "%s", bg->tag, A_END);
1916 }
1917 a_ok(a);
1918}
1919
1920static void acmd_bgcancel(admin *a, unsigned ac, char *av[])
1921{
1922 admin_bgop *bg;
1923
1924 if ((bg = a_bgfind(a, av[0])) == 0)
1925 a_fail(a, "unknown-tag", "%s", av[0], A_END);
1926 else {
1927 bg->cancel(bg);
1928 a_bgrelease(bg);
1929 a_ok(a);
1930 }
1931}
1932
449991a3
MW
1933static void acmd_algs(admin *a, unsigned ac, char *av[])
1934{
35c8b547
MW
1935 peer *p;
1936 const kdata *kd;
5b9f3d37 1937 const dhgrp *g;
35c8b547
MW
1938 const algswitch *algs;
1939
1940 if (!ac)
1941 kd = master;
1942 else {
1943 if ((p = a_findpeer(a, av[0])) == 0) return;
1944 kd = p->kx.kpriv;
1945 }
5b9f3d37 1946 g = kd->grp;
35c8b547
MW
1947 algs = &kd->algs;
1948
5b9f3d37 1949 g->ops->grpinfo(g, a);
449991a3 1950 a_info(a,
35c8b547
MW
1951 "hash=%s", algs->h->name,
1952 "mgf=%s", algs->mgf->name,
1953 "hash-sz=%lu", (unsigned long)algs->h->hashsz,
449991a3
MW
1954 A_END);
1955 a_info(a,
c70a7c5c
MW
1956 "bulk-transform=%s", algs->bulk->ops->name,
1957 "bulk-overhead=%lu",
1958 (unsigned long)algs->bulk->ops->overhead(algs->bulk),
449991a3 1959 A_END);
c70a7c5c 1960 algs->bulk->ops->alginfo(algs->bulk, a);
449991a3 1961 a_info(a,
c70a7c5c
MW
1962 "cipher-data-limit=%lu",
1963 (unsigned long)algs->bulk->ops->expsz(algs->bulk),
449991a3 1964 A_END);
449991a3
MW
1965 a_ok(a);
1966}
1967
410c8acf 1968static void acmd_list(admin *a, unsigned ac, char *av[])
1969{
c8e02c8a 1970 FOREACH_PEER(p, { a_info(a, "%s", p_name(p), A_END); });
3cdc3f3a 1971 a_ok(a);
410c8acf 1972}
1973
1974static void acmd_ifname(admin *a, unsigned ac, char *av[])
1975{
1976 peer *p;
1977
37941236 1978 if ((p = a_findpeer(a, av[0])) != 0) {
f43df819 1979 a_info(a, "%s", p_ifname(p), A_END);
3cdc3f3a 1980 a_ok(a);
1981 }
410c8acf 1982}
1983
64cf2223
MW
1984static void acmd_setifname(admin *a, unsigned ac, char *av[])
1985{
1986 peer *p;
1987
1988 if ((p = a_findpeer(a, av[0])) != 0) {
1989 a_notify("NEWIFNAME", "?PEER", p, "%s", p_ifname(p), "%s", av[1], A_END);
1990 p_setifname(p, av[1]);
1991 a_ok(a);
e04c2d50 1992 }
64cf2223
MW
1993}
1994
37941236 1995static void acmd_getchal(admin *a, unsigned ac, char *av[])
1996{
1997 buf b;
1998
1999 buf_init(&b, buf_i, PKBUFSZ);
3deadf73 2000 c_new(0, 0, &b);
f43df819 2001 a_info(a, "?B64", BBASE(&b), (size_t)BLEN(&b), A_END);
37941236 2002 a_ok(a);
2003}
2004
2005static void acmd_checkchal(admin *a, unsigned ac, char *av[])
2006{
37d4c59e
MW
2007 codec *b64 = base64_class.decoder(CDCF_NOEQPAD);
2008 int err;
37941236 2009 buf b;
2010 dstr d = DSTR_INIT;
2011
37d4c59e
MW
2012 if ((err = b64->ops->code(b64, av[0], strlen(av[0]), &d)) != 0 ||
2013 (err = b64->ops->code(b64, 0, 0, &d)) != 0)
2014 a_fail(a, "bad-base64", "%s", codec_strerror(err), A_END);
2015 else {
2016 buf_init(&b, d.buf, d.len);
3deadf73 2017 if (c_check(0, 0, &b) || BBAD(&b) || BLEFT(&b))
37d4c59e
MW
2018 a_fail(a, "invalid-challenge", A_END);
2019 else
2020 a_ok(a);
2021 }
2022 b64->ops->destroy(b64);
37941236 2023 dstr_destroy(&d);
2024}
2025
2026static void acmd_greet(admin *a, unsigned ac, char *av[])
2027{
2028 peer *p;
37d4c59e
MW
2029 int err;
2030 codec *b64;
37941236 2031 dstr d = DSTR_INIT;
2032
37d4c59e
MW
2033 if ((p = a_findpeer(a, av[0])) == 0) return;
2034 b64 = base64_class.decoder(CDCF_NOEQPAD);
2035 if ((err = b64->ops->code(b64, av[1], strlen(av[1]), &d)) != 0 ||
2036 (err = b64->ops->code(b64, 0, 0, &d)) != 0)
2037 a_fail(a, "bad-base64", "%s", codec_strerror(err), A_END);
2038 else {
37941236 2039 p_greet(p, d.buf, d.len);
37941236 2040 a_ok(a);
2041 }
37d4c59e
MW
2042 b64->ops->destroy(b64);
2043 dstr_destroy(&d);
37941236 2044}
2045
410c8acf 2046static void acmd_addr(admin *a, unsigned ac, char *av[])
2047{
2048 peer *p;
2049 const addr *ad;
2050
37941236 2051 if ((p = a_findpeer(a, av[0])) != 0) {
410c8acf 2052 ad = p_addr(p);
f43df819 2053 a_info(a, "?ADDR", ad, A_END);
3cdc3f3a 2054 a_ok(a);
410c8acf 2055 }
2056}
2057
060ca767 2058static void acmd_peerinfo(admin *a, unsigned ac, char *av[])
2059{
2060 peer *p;
2061 const peerspec *ps;
f3c6d21c 2062 const char *ptag;
060ca767 2063
37941236 2064 if ((p = a_findpeer(a, av[0])) != 0) {
2065 ps = p_spec(p);
f43df819 2066 a_info(a, "tunnel=%s", ps->tops->name, A_END);
8362ac1c 2067 if (ps->knock) a_info(a, "knock=%s", ps->knock, A_END);
fe2a5dcf
MW
2068 a_info(a, "key=%s", p_tag(p),
2069 "current-key=%s", p->kx.kpub->tag, A_END);
f3c6d21c
MW
2070 if ((ptag = p_privtag(p)) == 0) ptag = "(default)";
2071 a_info(a, "private-key=%s", ptag,
fe2a5dcf 2072 "current-private-key=%s", p->kx.kpriv->tag, A_END);
f43df819 2073 a_info(a, "keepalive=%lu", ps->t_ka, A_END);
bd322830
MW
2074 a_info(a, "corked=%s", BOOL(p->kx.f&KXF_CORK),
2075 "mobile=%s", BOOL(ps->f&PSF_MOBILE),
067aa5f0 2076 "ephemeral=%s", BOOL(ps->f&PSF_EPHEM),
bd322830 2077 A_END);
37941236 2078 a_ok(a);
060ca767 2079 }
060ca767 2080}
2081
2082static void acmd_servinfo(admin *a, unsigned ac, char *av[])
2083{
f43df819
MW
2084 a_info(a, "implementation=edgeware-tripe", A_END);
2085 a_info(a, "version=%s", VERSION, A_END);
2086 a_info(a, "daemon=%s", BOOL(flags & F_DAEMON), A_END);
060ca767 2087 a_ok(a);
2088}
2089
c7053da9 2090static void acmd_stats(admin *a, unsigned ac, char *av[])
2091{
2092 peer *p;
2093 stats *st;
2094
37941236 2095 if ((p = a_findpeer(a, av[0])) == 0)
060ca767 2096 return;
060ca767 2097
2098 st = p_stats(p);
f43df819
MW
2099 a_info(a, "start-time=%s", timestr(st->t_start), A_END);
2100 a_info(a, "last-packet-time=%s", timestr(st->t_last), A_END);
2101 a_info(a, "last-keyexch-time=%s", timestr(st->t_kx), A_END);
18ad8913
MW
2102 a_info(a, "packets-in=%lu", st->n_in, "bytes-in=%lu", st->sz_in, A_END);
2103 a_info(a,
2104 "packets-out=%lu", st->n_out,
2105 "bytes-out=%lu", st->sz_out,
2106 A_END);
2107 a_info(a,
2108 "keyexch-packets-in=%lu", st->n_kxin,
2109 "keyexch-bytes-in=%lu", st->sz_kxin,
2110 A_END);
2111 a_info(a,
2112 "keyexch-packets-out=%lu", st->n_kxout,
2113 "keyexch-bytes-out=%lu", st->sz_kxout,
2114 A_END);
2115 a_info(a,
2116 "ip-packets-in=%lu", st->n_ipin,
2117 "ip-bytes-in=%lu", st->sz_ipin,
2118 A_END);
2119 a_info(a,
e04c2d50 2120 "ip-packets-out=%lu", st->n_ipout,
18ad8913
MW
2121 "ip-bytes-out=%lu", st->sz_ipout,
2122 A_END);
f43df819 2123 a_info(a, "rejected-packets=%lu", st->n_reject, A_END);
060ca767 2124 a_ok(a);
c7053da9 2125}
2126
410c8acf 2127static void acmd_kill(admin *a, unsigned ac, char *av[])
2128{
2129 peer *p;
f98df549 2130
37941236 2131 if ((p = a_findpeer(a, av[0])) != 0) {
067aa5f0 2132 p_destroy(p, 1);
3cdc3f3a 2133 a_ok(a);
410c8acf 2134 }
2135}
2136
0ba8de86 2137static void acmd_forcekx(admin *a, unsigned ac, char *av[])
2138{
2139 peer *p;
f98df549 2140
37941236 2141 if ((p = a_findpeer(a, av[0])) != 0) {
de014da6 2142 kx_start(&p->kx, 1);
0ba8de86 2143 a_ok(a);
2144 }
2145}
2146
de014da6 2147static void acmd_reload(admin *a, unsigned ac, char *av[])
2148 { p_keyreload(); a_ok(a); }
2149
410c8acf 2150static void acmd_quit(admin *a, unsigned ac, char *av[])
2151{
f43df819 2152 a_warn("SERVER", "quit", "admin-request", A_END);
3cdc3f3a 2153 a_ok(a);
410c8acf 2154 a_quit();
2155}
2156
3cdc3f3a 2157static void acmd_version(admin *a, unsigned ac, char *av[])
2158{
f43df819 2159 a_info(a, "%s", PACKAGE, "%s", VERSION, A_END);
3cdc3f3a 2160 a_ok(a);
2161}
2162
42da2a58 2163static void acmd_tunnels(admin *a, unsigned ac, char *av[])
2164{
2165 int i;
f98df549 2166
42da2a58 2167 for (i = 0; tunnels[i]; i++)
f43df819 2168 a_info(a, "%s", tunnels[i]->name, A_END);
42da2a58 2169 a_ok(a);
2170}
2171
410c8acf 2172/* --- The command table and help --- */
2173
2174typedef struct acmd {
2175 const char *name;
2176 const char *help;
2177 unsigned argmin, argmax;
2178 void (*func)(admin */*a*/, unsigned /*ac*/, char */*av*/[]);
2179} acmd;
2180
2181static void acmd_help(admin */*a*/, unsigned /*ac*/, char */*av*/[]);
2182
2183static const acmd acmdtab[] = {
9986f0b5 2184 { "add", "[OPTIONS] PEER ADDR ...", 2, 0xffff, acmd_add },
f43df819 2185 { "addr", "PEER", 1, 1, acmd_addr },
35c8b547 2186 { "algs", "[PEER]", 0, 1, acmd_algs },
ff92ffd3 2187 { "bgcancel", "TAG", 1, 1, acmd_bgcancel },
f43df819
MW
2188 { "checkchal", "CHAL", 1, 1, acmd_checkchal },
2189 { "daemon", 0, 0, 0, acmd_daemon },
2190 { "eping", "[OPTIONS] PEER", 1, 0xffff, acmd_eping },
2191 { "forcekx", "PEER", 1, 1, acmd_forcekx },
2192 { "getchal", 0, 0, 0, acmd_getchal },
2193 { "greet", "PEER CHAL", 2, 2, acmd_greet },
2194 { "help", 0, 0, 0, acmd_help },
2195 { "ifname", "PEER", 1, 1, acmd_ifname },
ff92ffd3 2196 { "jobs", 0, 0, 0, acmd_jobs },
f43df819
MW
2197 { "kill", "PEER", 1, 1, acmd_kill },
2198 { "list", 0, 0, 0, acmd_list },
2199 { "notify", "MESSAGE ...", 1, 0xffff, acmd_notify },
2200 { "peerinfo", "PEER", 1, 1, acmd_peerinfo },
2201 { "ping", "[OPTIONS] PEER", 1, 0xffff, acmd_ping },
5d06f63e 2202 { "port", "[FAMILY]", 0, 1, acmd_port },
f43df819
MW
2203 { "quit", 0, 0, 0, acmd_quit },
2204 { "reload", 0, 0, 0, acmd_reload },
2205 { "servinfo", 0, 0, 0, acmd_servinfo },
64cf2223 2206 { "setifname", "PEER NEW-NAME", 2, 2, acmd_setifname },
405fc4da 2207 { "stats", "PEER", 1, 1, acmd_stats },
be6a1b7a
MW
2208 { "svcclaim", "SERVICE VERSION", 2, 2, acmd_svcclaim },
2209 { "svcensure", "SERVICE [VERSION]", 1, 2, acmd_svcensure },
ef2f29c9
MW
2210 { "svcfail", "JOBID TOKENS...", 1, 0xffff, acmd_svcfail },
2211 { "svcinfo", "JOBID TOKENS...", 1, 0xffff, acmd_svcinfo },
be6a1b7a 2212 { "svclist", 0, 0, 0, acmd_svclist },
ef2f29c9 2213 { "svcok", "JOBID", 1, 1, acmd_svcok },
be6a1b7a
MW
2214 { "svcquery", "SERVICE", 1, 1, acmd_svcquery },
2215 { "svcrelease", "SERVICE", 1, 1, acmd_svcrelease },
ef2f29c9
MW
2216 { "svcsubmit", "[OPTIONS] SERVICE TOKENS...",
2217 2, 0xffff, acmd_svcsubmit },
de014da6 2218#ifndef NTRACE
f43df819 2219 { "trace", "[OPTIONS]", 0, 1, acmd_trace },
de014da6 2220#endif
f43df819
MW
2221 { "tunnels", 0, 0, 0, acmd_tunnels },
2222 { "version", 0, 0, 0, acmd_version },
2223 { "warn", "MESSAGE ...", 1, 0xffff, acmd_warn },
e04c2d50 2224 { "watch", "[OPTIONS]", 0, 1, acmd_watch },
410c8acf 2225 { 0, 0, 0, 0, 0 }
2226};
2227
2228static void acmd_help(admin *a, unsigned ac, char *av[])
2229{
2230 const acmd *c;
f98df549 2231
f43df819
MW
2232 for (c = acmdtab; c->name; c++) {
2233 if (c->help)
2234 a_info(a, "%s", c->name, "*%s", c->help, A_END);
e04c2d50 2235 else
f43df819
MW
2236 a_info(a, "%s", c->name, A_END);
2237 }
3cdc3f3a 2238 a_ok(a);
410c8acf 2239}
2240
2241/*----- Connection handling -----------------------------------------------*/
2242
c511e1f9 2243/* --- @a_destroypending@ --- *
410c8acf 2244 *
c511e1f9 2245 * Arguments: ---
fd3cf232 2246 *
2247 * Returns: ---
2248 *
c511e1f9 2249 * Use: Destroys pending admin connections at a safe time.
fd3cf232 2250 */
2251
c511e1f9 2252static void a_destroypending(void)
410c8acf 2253{
94593d1b 2254 admin *a, *aa, *head;
de014da6 2255 admin_bgop *bg, *bbg;
be6a1b7a 2256 admin_service *svc, *ssvc;
de014da6 2257
94593d1b
MW
2258 /* --- Destroy connections marked as pending --- *
2259 *
2260 * Slightly messy. Killing clients may cause others to finally die. Make
2261 * sure that they can be put on the list without clobbering anything or
2262 * getting lost.
2263 */
fd3cf232 2264
94593d1b
MW
2265 while (a_dead) {
2266 head = a_dead;
2267 a_dead = 0;
2268 for (a = head; a; a = aa) {
2269 aa = a->next;
2270 assert(a->f & AF_DEAD);
c511e1f9 2271
94593d1b 2272 /* --- Report what we're doing --- */
c511e1f9 2273
94593d1b
MW
2274 T( trace(T_ADMIN, "admin: completing destruction of connection %u",
2275 a->seq); )
c511e1f9 2276
94593d1b 2277 /* --- If this is the foreground client then shut down --- */
46dde080 2278
94593d1b
MW
2279 if (a->f & AF_FOREGROUND) {
2280 T( trace(T_ADMIN, "admin: foreground client quit: shutting down"); )
2281 a_warn("SERVER", "quit", "foreground-eof", A_END);
2282 a_quit();
2283 }
46dde080 2284
94593d1b 2285 /* --- Abort any background jobs in progress --- */
c511e1f9 2286
94593d1b
MW
2287 for (bg = a->bg; bg; bg = bbg) {
2288 bbg = bg->next;
2289 bg->cancel(bg);
2290 if (bg->tag) xfree(bg->tag);
2291 xfree(bg);
2292 }
c511e1f9 2293
94593d1b 2294 /* --- Release services I hold, and abort pending jobs --- */
be6a1b7a 2295
94593d1b
MW
2296 for (svc = a->svcs; svc; svc = ssvc) {
2297 ssvc = svc->next;
2298 a_svcrelease(svc);
2299 }
2300 a_jobtablefinal(&a->j);
be6a1b7a 2301
94593d1b 2302 /* --- Close file descriptors and selectory --- */
c511e1f9 2303
94593d1b
MW
2304 selbuf_destroy(&a->b);
2305 if (a->b.reader.fd != a->w.fd) close(a->b.reader.fd);
2306 close(a->w.fd);
2307 if (a_stdin == a) a_stdin = 0;
c511e1f9 2308
94593d1b 2309 /* --- Done --- */
c511e1f9 2310
94593d1b
MW
2311 DESTROY(a);
2312 }
410c8acf 2313 }
060ca767 2314}
2315
fd3cf232 2316/* --- @a_destroy@ --- *
2317 *
2318 * Arguments: @admin *a@ = pointer to an admin block
2319 *
2320 * Returns: ---
2321 *
2322 * Use: Destroys an admin block. This requires a certain amount of
2323 * care.
2324 */
2325
de014da6 2326static void freequeue(oqueue *q)
2327{
2328 obuf *o, *oo;
2329
2330 for (o = q->hd; o; o = oo) {
2331 oo = o->next;
2332 xfree(o);
2333 }
2334 q->hd = q->tl = 0;
2335}
2336
fd3cf232 2337static void a_destroy(admin *a)
2338{
fd3cf232 2339 if (a->f & AF_DEAD)
2340 return;
2341
c511e1f9
MW
2342 if (a->next) a->next->prev = a->prev;
2343 if (a->prev) a->prev->next = a->next;
2344 else admins = a->next;
fd3cf232 2345
c511e1f9 2346 if (a->out.hd) sel_rmfile(&a->w);
de014da6 2347 freequeue(&a->out);
fd3cf232 2348
c511e1f9
MW
2349 a->f |= AF_DEAD;
2350 a->next = a_dead;
2351 a_dead = a;
fd3cf232 2352
c511e1f9 2353 T( trace(T_ADMIN, "admin: killing connection %u", a->seq); )
fd3cf232 2354}
2355
410c8acf 2356/* --- @a_line@ --- *
2357 *
2358 * Arguments: @char *p@ = pointer to the line read
3008eabf 2359 * @size_t len@ = length of the line
410c8acf 2360 * @void *vp@ = pointer to my admin block
2361 *
2362 * Returns: ---
2363 *
2364 * Use: Handles a line of input.
2365 */
2366
3008eabf 2367static void a_line(char *p, size_t len, void *vp)
410c8acf 2368{
2369 admin *a = vp;
2370 const acmd *c;
6f88042a 2371 char *av[16 + 1];
410c8acf 2372 size_t ac;
2373
f4c9c08f 2374 QUICKRAND;
fd3cf232 2375 if (a->f & AF_DEAD)
2376 return;
410c8acf 2377 if (!p) {
de014da6 2378 if (!a->bg)
2379 a_destroy(a);
2380 else {
2381 a->f |= AF_CLOSE;
2382 selbuf_disable(&a->b);
2383 }
410c8acf 2384 return;
2385 }
6f88042a 2386 ac = str_qsplit(p, av, N(av) - 1, 0, STRF_QUOTE);
410c8acf 2387 if (!ac)
2388 return;
6f88042a 2389 av[ac] = 0;
410c8acf 2390 for (c = acmdtab; c->name; c++) {
3cdc3f3a 2391 if (mystrieq(av[0], c->name)) {
410c8acf 2392 ac--;
f43df819
MW
2393 if (c->argmin > ac || ac > c->argmax) {
2394 if (!c->help)
2395 a_fail(a, "bad-syntax", "%s", c->name, "", A_END);
e04c2d50 2396 else
f43df819 2397 a_fail(a, "bad-syntax", "%s", c->name, "%s", c->help, A_END);
c511e1f9 2398 } else
410c8acf 2399 c->func(a, ac, av + 1);
2400 return;
2401 }
2402 }
f43df819 2403 a_fail(a, "unknown-command", "%s", av[0], A_END);
410c8acf 2404}
2405
2406/* --- @a_create@ --- *
2407 *
2408 * Arguments: @int fd_in, fd_out@ = file descriptors to use
3cdc3f3a 2409 * @unsigned f@ = initial flags to set
410c8acf 2410 *
2411 * Returns: ---
2412 *
f88b41d6 2413 * Use: Creates a new admin connection. It's safe to call this
7737eb87
MW
2414 * before @a_init@ -- and, indeed, this makes sense if you also
2415 * call @a_switcherr@ to report initialization errors through
2416 * the administration machinery.
410c8acf 2417 */
2418
3cdc3f3a 2419void a_create(int fd_in, int fd_out, unsigned f)
410c8acf 2420{
2421 admin *a = CREATE(admin);
3cdc3f3a 2422
93bee2c4 2423 T( static unsigned seq = 0;
2424 a->seq = seq++; )
410c8acf 2425 T( trace(T_ADMIN, "admin: accepted connection %u", a->seq); )
de014da6 2426 a->bg = 0;
042d5c20 2427 a->ref = 0;
be6a1b7a 2428 a->svcs = 0;
5d46c0f8 2429 a_jobtableinit(&a->j);
3cdc3f3a 2430 a->f = f;
de014da6 2431 if (fd_in == STDIN_FILENO) a_stdin = a;
fd3cf232 2432 fdflags(fd_in, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
410c8acf 2433 if (fd_out != fd_in)
fd3cf232 2434 fdflags(fd_out, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
410c8acf 2435 selbuf_init(&a->b, &sel, fd_in, a_line, a);
fd3cf232 2436 sel_initfile(&sel, &a->w, fd_out, SEL_WRITE, a_flush, a);
de014da6 2437 a->out.hd = a->out.tl = 0;
410c8acf 2438 a->next = admins;
2439 a->prev = 0;
de014da6 2440 if (admins) admins->prev = a;
410c8acf 2441 admins = a;
2442}
2443
2444/* --- @a_accept@ --- *
2445 *
2446 * Arguments: @int fd@ = file descriptor to accept
2447 * @unsigned mode@ = what to do
2448 * @void *v@ = uninteresting pointer
2449 *
2450 * Returns: ---
2451 *
2452 * Use: Accepts a new admin connection.
2453 */
2454
2455static void a_accept(int fd, unsigned mode, void *v)
2456{
2457 int nfd;
2458 struct sockaddr_un sun;
cb160b86 2459 socklen_t sz = sizeof(sun);
410c8acf 2460
2461 if ((nfd = accept(fd, (struct sockaddr *)&sun, &sz)) < 0) {
1ecee057 2462 if (errno != EINTR && errno != EAGAIN && errno != EWOULDBLOCK &&
2463 errno != ECONNABORTED && errno != EPROTO)
f43df819 2464 a_warn("ADMIN", "accept-error", "?ERRNO", A_END);
410c8acf 2465 return;
2466 }
3cdc3f3a 2467 a_create(nfd, nfd, 0);
410c8acf 2468}
2469
c511e1f9
MW
2470/* --- @a_preselect@ --- *
2471 *
2472 * Arguments: ---
2473 *
2474 * Returns: ---
2475 *
2476 * Use: Informs the admin module that we're about to select again,
2477 * and that it should do cleanup things it has delayed until a
2478 * `safe' time.
2479 */
2480
2481void a_preselect(void) { if (a_dead) a_destroypending(); }
2482
410c8acf 2483/* --- @a_daemon@ --- *
2484 *
2485 * Arguments: ---
2486 *
2487 * Returns: ---
2488 *
2489 * Use: Informs the admin module that it's a daemon.
2490 */
2491
f98df549 2492void a_daemon(void) { flags |= F_DAEMON; }
410c8acf 2493
7737eb87 2494/* --- @a_listen@ --- *
410c8acf 2495 *
2496 * Arguments: @const char *name@ = socket name to create
aa2405e8
MW
2497 * @uid_t u@ = user to own the socket
2498 * @gid_t g@ = group to own the socket
a9279e37 2499 * @mode_t m@ = permissions to set on the socket
410c8acf 2500 *
2501 * Returns: ---
2502 *
2503 * Use: Creates the admin listening socket.
2504 */
2505
7737eb87 2506void a_listen(const char *name, uid_t u, gid_t g, mode_t m)
410c8acf 2507{
2508 int fd;
2509 int n = 5;
2510 struct sockaddr_un sun;
410c8acf 2511 size_t sz;
879483d7 2512 mode_t omask;
be6a1b7a 2513
410c8acf 2514 /* --- Set up the socket address --- */
2515
2516 sz = strlen(name) + 1;
5ae728a6
MW
2517 if (sz > sizeof(sun.sun_path)) {
2518 a_warn("ADMIN", "admin-socket", "%s", name, "name-too-long", A_END);
2519 exit(EXIT_FAILURE);
2520 }
410c8acf 2521 BURN(sun);
2522 sun.sun_family = AF_UNIX;
2523 memcpy(sun.sun_path, name, sz);
2524 sz += offsetof(struct sockaddr_un, sun_path);
2525
2526 /* --- Attempt to bind to the socket --- */
2527
879483d7 2528 omask = umask(0077);
410c8acf 2529again:
5ae728a6
MW
2530 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
2531 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2532 "create-failed", "?ERRNO", A_END);
2533 exit(EXIT_FAILURE);
2534 }
410c8acf 2535 if (bind(fd, (struct sockaddr *)&sun, sz) < 0) {
2536 struct stat st;
2537 int e = errno;
2538 if (errno != EADDRINUSE) {
5ae728a6
MW
2539 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2540 "bind-failed", "?ERRNO", A_END);
2541 exit(EXIT_FAILURE);
2542 }
2543 if (!n) {
2544 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2545 "too-many-retries", A_END);
2546 exit(EXIT_FAILURE);
410c8acf 2547 }
410c8acf 2548 n--;
2549 if (!connect(fd, (struct sockaddr *)&sun, sz)) {
5ae728a6
MW
2550 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2551 "already-in-use", A_END);
2552 exit(EXIT_FAILURE);
2553 }
2554 if (errno != ECONNREFUSED) {
2555 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2556 "bind-failed", "?ERR", e, A_END);
2557 exit(EXIT_FAILURE);
410c8acf 2558 }
410c8acf 2559 if (stat(sun.sun_path, &st)) {
7487f347 2560 if (errno == ENOENT) { close(fd); goto again; }
5ae728a6
MW
2561 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2562 "stat-failed", "?ERRNO", A_END);
2563 exit(EXIT_FAILURE);
2564 }
2565 if (!S_ISSOCK(st.st_mode)) {
2566 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2567 "not-a-socket", A_END);
2568 exit(EXIT_FAILURE);
410c8acf 2569 }
c7053da9 2570 T( trace(T_ADMIN, "admin: stale socket found; removing it"); )
410c8acf 2571 unlink(sun.sun_path);
2572 close(fd);
2573 goto again;
2574 }
aa2405e8 2575 if (chown(sun.sun_path, u, g)) {
5ae728a6
MW
2576 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2577 "chown-failed", "?ERRNO", A_END);
2578 exit(EXIT_FAILURE);
aa2405e8 2579 }
a9279e37 2580 if (chmod(sun.sun_path, m)) {
5ae728a6
MW
2581 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2582 "chmod-failed", "?ERRNO", A_END);
2583 exit(EXIT_FAILURE);
a9279e37 2584 }
879483d7 2585 umask(omask);
410c8acf 2586 fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
5ae728a6
MW
2587 if (listen(fd, 5)) {
2588 a_warn("ADMIN", "admin-socket", "%s", sun.sun_path,
2589 "listen-failed", "?ERRNO", A_END);
2590 exit(EXIT_FAILURE);
2591 }
410c8acf 2592
2593 /* --- Listen to the socket --- */
2594
2595 sel_initfile(&sel, &sock, fd, SEL_READ, a_accept, 0);
2596 sel_addfile(&sock);
2597 sockname = name;
7737eb87
MW
2598}
2599
2600/* --- @a_switcherr@ --- *
2601 *
2602 * Arguments: ---
2603 *
2604 * Returns: ---
2605 *
2606 * Use: Arrange to report warnings, trace messages, etc. to
2607 * administration clients rather than the standard-error stream.
2608 *
2609 * Obviously this makes no sense unless there is at least one
2610 * client established. Calling @a_listen@ won't help with this,
2611 * because the earliest a new client can connect is during the
2612 * first select-loop iteration, which is too late: some initial
2613 * client must have been added manually using @a_create@.
2614 */
2615
2616void a_switcherr(void)
2617{
2618 T( trace_custom(a_trace, 0);
2619 trace(T_ADMIN, "admin: enabled custom tracing"); )
2620 flags |= F_INIT;
2621}
2622
2623/* --- @a_signals@ --- *
2624 *
2625 * Arguments: ---
2626 *
2627 * Returns: ---
2628 *
2629 * Use: Establishes handlers for the obvious signals.
2630 */
2631
2632void a_signals(void)
2633{
2634 struct sigaction sa;
2635
2636 sig_add(&s_term, SIGTERM, a_sigdie, 0);
2637 sig_add(&s_hup, SIGHUP, a_sighup, 0);
2638 sigaction(SIGINT, 0, &sa);
2639 if (sa.sa_handler != SIG_IGN)
2640 sig_add(&s_int, SIGINT, a_sigdie, 0);
2641}
2642
2643/* --- @a_init@ --- *
2644 *
2645 * Arguments: ---
2646 *
2647 * Returns: ---
2648 *
2649 * Use: Creates the admin listening socket.
2650 */
2651
2652void a_init(void)
2653{
2654#ifdef HAVE_LIBADNS
2655 int err;
2656#endif
2657
2658 /* --- Create services table --- */
2659
2660 sym_create(&a_svcs);
2661
2662 /* --- Prepare the background name resolver --- */
2663
971e5689
MW
2664#ifdef HAVE_LIBADNS
2665 if ((err = adns_init(&ads,
2666 (adns_if_permit_ipv4 | adns_if_permit_ipv6 |
2667 adns_if_noserverwarn | adns_if_nosigpipe |
2668 adns_if_noautosys),
5ae728a6
MW
2669 0)) != 0) {
2670 a_warn("ADMIN", "adns-init-failed", "?ERRNO", A_END);
2671 exit(EXIT_FAILURE);
2672 }
971e5689
MW
2673 sel_addhook(&sel, &hook, before_select, after_select, 0);
2674#else
410c8acf 2675 bres_init(&sel);
971e5689 2676#endif
410c8acf 2677}
2678
2679/*----- That's all, folks -------------------------------------------------*/