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410c8acf | 1 | /* -*-c-*- |
2 | * | |
2d752320 | 3 | * $Id$ |
410c8acf | 4 | * |
5 | * Admin interface for configuration | |
6 | * | |
7 | * (c) 2001 Straylight/Edgeware | |
8 | */ | |
9 | ||
10 | /*----- Licensing notice --------------------------------------------------* | |
11 | * | |
12 | * This file is part of Trivial IP Encryption (TrIPE). | |
13 | * | |
14 | * TrIPE is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * TrIPE is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with TrIPE; if not, write to the Free Software Foundation, | |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
27 | */ | |
28 | ||
410c8acf | 29 | /*----- Header files ------------------------------------------------------*/ |
30 | ||
31 | #include "tripe.h" | |
32 | ||
33 | /*----- Global variables --------------------------------------------------*/ | |
34 | ||
35 | #ifndef NTRACE | |
36 | ||
37 | const trace_opt tr_opts[] = { | |
38 | { 't', T_TUNNEL, "tunnel events" }, | |
39 | { 'r', T_PEER, "peer events" }, | |
40 | { 'a', T_ADMIN, "admin interface" }, | |
410c8acf | 41 | { 's', T_KEYSET, "symmetric keyset management" }, |
42 | { 'x', T_KEYEXCH, "key exchange" }, | |
43 | { 'm', T_KEYMGMT, "key management" }, | |
37941236 | 44 | { 'l', T_CHAL, "challenge management" }, |
45 | { 'p', T_PACKET, "packet contents" }, | |
46 | { 'c', T_CRYPTO, "crypto details" }, | |
410c8acf | 47 | { 'A', T_ALL, "all of the above" }, |
48 | { 0, 0, 0 } | |
49 | }; | |
50 | ||
51 | unsigned tr_flags = 0; | |
52 | #endif | |
53 | ||
3cdc3f3a | 54 | static const trace_opt w_opts[] = { |
55 | { 't', AF_TRACE, "trace messages" }, | |
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 | ||
64 | static admin *admins; | |
65 | static sel_file sock; | |
66 | static const char *sockname; | |
67 | static unsigned flags = 0; | |
68 | static admin *a_stdin = 0; | |
69 | static sig s_term, s_int, s_hup; | |
70 | ||
71 | #define F_DAEMON 1u | |
72 | #define F_INIT 2u | |
73 | ||
74 | #define T_RESOLVE SEC(30) | |
0ba8de86 | 75 | #define T_PING SEC(5) |
410c8acf | 76 | |
fd3cf232 | 77 | static void a_destroy(admin */*a*/); |
78 | static void a_lock(admin */*a*/); | |
79 | static void a_unlock(admin */*a*/); | |
80 | ||
060ca767 | 81 | #define BOOL(x) ((x) ? "t" : "nil") |
82 | ||
fd3cf232 | 83 | /*----- Output functions --------------------------------------------------*/ |
84 | ||
85 | /* --- @trywrite@ --- * | |
86 | * | |
87 | * Arguments: @admin *a@ = pointer to an admin block | |
88 | * @const char *p@ = pointer to buffer to write | |
89 | * @size_t sz@ = size of data to write | |
90 | * | |
91 | * Returns: The number of bytes written, or less than zero on error. | |
92 | * | |
93 | * Use: Attempts to write data to a client. | |
94 | */ | |
95 | ||
96 | static ssize_t trywrite(admin *a, const char *p, size_t sz) | |
97 | { | |
98 | ssize_t n, done = 0; | |
99 | ||
100 | again: | |
101 | if (!sz) | |
102 | return (done); | |
103 | n = write(a->w.fd, p, sz); | |
104 | if (n > 0) { | |
105 | done += n; | |
106 | p += n; | |
107 | sz -= n; | |
108 | goto again; | |
109 | } | |
110 | if (n < 0) { | |
111 | if (errno == EINTR) | |
112 | goto again; | |
113 | if (errno != EAGAIN && errno != EWOULDBLOCK) { | |
114 | a_destroy(a); | |
f43df819 | 115 | a_warn("ADMIN", "client-write-error", "?ERRNO", A_END); |
fd3cf232 | 116 | return (-1); |
117 | } | |
118 | } | |
119 | return (done); | |
120 | } | |
121 | ||
de014da6 | 122 | /* --- @doqueue@ -- * |
fd3cf232 | 123 | * |
de014da6 | 124 | * Arguments: @oqueue *q@ = pointer to output queue |
fd3cf232 | 125 | * @const char *p@ = pointer to buffer to write |
de014da6 | 126 | * @size_t sz@ = size of buffer |
fd3cf232 | 127 | * |
de014da6 | 128 | * Returns: Nonzero if the queue was previously empty. |
fd3cf232 | 129 | * |
de014da6 | 130 | * Use: Queues data to be written later. |
fd3cf232 | 131 | */ |
132 | ||
de014da6 | 133 | static int doqueue(oqueue *q, const char *p, size_t sz) |
fd3cf232 | 134 | { |
fd3cf232 | 135 | obuf *o; |
de014da6 | 136 | int rc = 0; |
137 | size_t n; | |
fd3cf232 | 138 | |
de014da6 | 139 | o = q->tl; |
fd3cf232 | 140 | if (!o) |
de014da6 | 141 | rc = 1; |
fd3cf232 | 142 | else if (o->p_in < o->buf + OBUFSZ) |
143 | goto noalloc; | |
144 | ||
145 | do { | |
146 | o = xmalloc(sizeof(obuf)); | |
147 | o->next = 0; | |
148 | o->p_in = o->p_out = o->buf; | |
de014da6 | 149 | if (q->tl) |
150 | q->tl->next = o; | |
fd3cf232 | 151 | else |
de014da6 | 152 | q->hd = o; |
153 | q->tl = o; | |
fd3cf232 | 154 | |
155 | noalloc: | |
156 | n = o->buf + OBUFSZ - o->p_in; | |
157 | if (n > sz) | |
158 | n = sz; | |
159 | memcpy(o->p_in, p, n); | |
160 | o->p_in += n; | |
161 | p += n; | |
162 | sz -= n; | |
163 | } while (sz); | |
de014da6 | 164 | |
165 | return (rc); | |
166 | } | |
167 | ||
168 | /* --- @dosend@ --- * | |
169 | * | |
170 | * Arguemnts: @admin *a@ = pointer to an admin block | |
171 | * @const char *p@ = pointer to buffer to write | |
172 | * @size_t sz@ = size of data to write | |
173 | * | |
174 | * Returns: --- | |
175 | * | |
176 | * Use: Sends data to an admin client. | |
177 | */ | |
178 | ||
179 | static void dosend(admin *a, const char *p, size_t sz) | |
180 | { | |
181 | ssize_t n; | |
182 | ||
183 | if (a->f & AF_DEAD) | |
184 | return; | |
185 | if (!a->out.hd) { | |
186 | if ((n = trywrite(a, p, sz)) < 0) | |
187 | return; | |
188 | p += n; | |
189 | sz -= n; | |
190 | if (!sz) | |
191 | return; | |
192 | } | |
193 | if (doqueue(&a->out, p, sz)) | |
194 | sel_addfile(&a->w); | |
fd3cf232 | 195 | } |
196 | ||
197 | /* --- @a_flush@ --- * | |
198 | * | |
199 | * Arguments: @int fd@ = file descriptor | |
200 | * @unsigned mode@ = what's happening | |
201 | * @void *v@ = pointer to my admin block | |
202 | * | |
203 | * Returns: --- | |
204 | * | |
205 | * Use: Flushes buffers when a client is ready to read again. | |
206 | */ | |
207 | ||
208 | static void a_flush(int fd, unsigned mode, void *v) | |
209 | { | |
210 | admin *a = v; | |
211 | obuf *o, *oo; | |
212 | ssize_t n; | |
213 | ||
de014da6 | 214 | o = a->out.hd; |
fd3cf232 | 215 | while (o) { |
216 | if ((n = trywrite(a, o->p_out, o->p_in - o->p_out)) < 0) | |
217 | return; | |
218 | o->p_out += n; | |
219 | if (o->p_in < o->p_out) | |
220 | break; | |
221 | oo = o; | |
222 | o = o->next; | |
223 | xfree(oo); | |
224 | } | |
de014da6 | 225 | a->out.hd = o; |
fd3cf232 | 226 | if (!o) { |
de014da6 | 227 | a->out.tl = 0; |
fd3cf232 | 228 | sel_rmfile(&a->w); |
229 | } | |
230 | } | |
231 | ||
410c8acf | 232 | /*----- Utility functions -------------------------------------------------*/ |
233 | ||
f43df819 MW |
234 | /* --- @quotify@ --- * |
235 | * | |
236 | * Arguments: @dstr *d@ = where to write the answer | |
237 | * @const char *p@ = string to quotify | |
238 | * | |
239 | * Returns: --- | |
240 | * | |
241 | * Use: Quotes the given string if necessary, according to our | |
242 | * quoting rules. | |
243 | */ | |
244 | ||
245 | static void quotify(dstr *d, const char *p) | |
246 | { | |
247 | if (d->len) | |
248 | dstr_putc(d, ' '); | |
249 | if (*p && !p[strcspn(p, "\"' \t\n\v")]) | |
250 | dstr_puts(d, p); | |
251 | else { | |
252 | dstr_putc(d, '\"'); | |
253 | while (*p) { | |
254 | if (*p == '\\' || *p == '\"') | |
255 | dstr_putc(d, '\\'); | |
256 | dstr_putc(d, *p++); | |
257 | } | |
258 | dstr_putc(d, '\"'); | |
259 | } | |
260 | } | |
261 | ||
262 | /* --- @a_vformat@ --- * | |
263 | * | |
264 | * Arguments: @dstr *d@ = where to leave the formatted message | |
265 | * @const char *fmt@ = pointer to format string | |
266 | * @va_list ap@ = arguments in list | |
267 | * | |
268 | * Returns: --- | |
269 | * | |
270 | * Use: Main message token formatting driver. | |
271 | */ | |
272 | ||
273 | static void a_vformat(dstr *d, const char *fmt, va_list ap) | |
274 | { | |
275 | dstr dd = DSTR_INIT; | |
276 | ||
277 | while (fmt) { | |
278 | if (*fmt == '*') { | |
279 | dstr_putc(d, ' '); | |
280 | dstr_vputf(d, fmt + 1, &ap); | |
281 | } else if (*fmt == '?') { | |
282 | if (strcmp(fmt, "?ADDR") == 0) { | |
283 | const addr *a = va_arg(ap, const addr *); | |
284 | switch (a->sa.sa_family) { | |
285 | case AF_INET: | |
286 | quotify(d, "INET"); | |
287 | quotify(d, inet_ntoa(a->sin.sin_addr)); | |
288 | dstr_putf(d, " %u", (unsigned)ntohs(a->sin.sin_port)); | |
289 | break; | |
290 | default: | |
291 | abort(); | |
292 | } | |
293 | } else if (strcmp(fmt, "?B64") == 0) { | |
294 | const octet *p = va_arg(ap, const octet *); | |
295 | size_t n = va_arg(ap, size_t); | |
296 | base64_ctx b64; | |
297 | dstr_putc(d, ' '); | |
298 | base64_init(&b64); | |
299 | b64.indent = ""; | |
300 | b64.maxline = 0; | |
301 | base64_encode(&b64, p, n, d); | |
302 | base64_encode(&b64, 0, 0, d); | |
303 | while (d->len && d->buf[d->len - 1] == '=') d->len--; | |
304 | } else if (strcmp(fmt, "?PEER") == 0) | |
305 | quotify(d, p_name(va_arg(ap, peer *))); | |
306 | else if (strcmp(fmt, "?ERRNO") == 0) { | |
307 | dstr_putf(d, " E%d", errno); | |
308 | quotify(d, strerror(errno)); | |
309 | } else | |
310 | abort(); | |
311 | } else { | |
312 | if (*fmt == '!') fmt++; | |
313 | DRESET(&dd); | |
314 | dstr_vputf(&dd, fmt, &ap); | |
315 | quotify(d, dd.buf); | |
316 | } | |
317 | fmt = va_arg(ap, const char *); | |
318 | } | |
319 | ||
320 | dstr_destroy(&dd); | |
321 | } | |
322 | ||
3cdc3f3a | 323 | /* --- @a_write@, @a_vwrite@ --- * |
410c8acf | 324 | * |
325 | * Arguments: @admin *a@ = admin connection to write to | |
de014da6 | 326 | * @const char *status@ = status code to report |
327 | * @const char *tag@ = tag string, or null | |
410c8acf | 328 | * @const char *fmt@ = pointer to format string |
3cdc3f3a | 329 | * @va_list ap@ = arguments in list |
410c8acf | 330 | * @...@ = other arguments |
331 | * | |
332 | * Returns: --- | |
333 | * | |
334 | * Use: Sends a message to an admin connection. | |
335 | */ | |
336 | ||
de014da6 | 337 | static void a_vwrite(admin *a, const char *status, const char *tag, |
338 | const char *fmt, va_list ap) | |
410c8acf | 339 | { |
410c8acf | 340 | dstr d = DSTR_INIT; |
de014da6 | 341 | if (tag) dstr_puts(&d, "BG"); |
342 | dstr_puts(&d, status); | |
f43df819 MW |
343 | if (tag) quotify(&d, tag); |
344 | a_vformat(&d, fmt, ap); | |
3cdc3f3a | 345 | dstr_putc(&d, '\n'); |
346 | dosend(a, d.buf, d.len); | |
347 | dstr_destroy(&d); | |
348 | } | |
349 | ||
de014da6 | 350 | static void a_write(admin *a, const char *status, const char *tag, |
351 | const char *fmt, ...) | |
3cdc3f3a | 352 | { |
353 | va_list ap; | |
410c8acf | 354 | va_start(ap, fmt); |
de014da6 | 355 | a_vwrite(a, status, tag, fmt, ap); |
410c8acf | 356 | va_end(ap); |
3cdc3f3a | 357 | } |
358 | ||
359 | /* --- @a_ok@, @a_info@, @a_fail@ --- * | |
360 | * | |
361 | * Arguments: @admin *a@ = connection | |
362 | * @const char *fmt@ = format string | |
363 | * @...@ = other arguments | |
364 | * | |
365 | * Returns: --- | |
366 | * | |
367 | * Use: Convenience functions for @a_write@. | |
368 | */ | |
369 | ||
f43df819 | 370 | static void a_ok(admin *a) { a_write(a, "OK", 0, A_END); } |
3cdc3f3a | 371 | |
372 | static void a_info(admin *a, const char *fmt, ...) | |
373 | { | |
374 | va_list ap; | |
375 | va_start(ap, fmt); | |
de014da6 | 376 | a_vwrite(a, "INFO", 0, fmt, ap); |
3cdc3f3a | 377 | va_end(ap); |
378 | } | |
379 | ||
380 | static void a_fail(admin *a, const char *fmt, ...) | |
381 | { | |
382 | va_list ap; | |
383 | va_start(ap, fmt); | |
de014da6 | 384 | a_vwrite(a, "FAIL", 0, fmt, ap); |
3cdc3f3a | 385 | va_end(ap); |
386 | } | |
387 | ||
388 | /* --- @a_alert@, @a_valert@, @a_rawalert@ --- * | |
389 | * | |
390 | * Arguments: @unsigned f_and, f_eq@ = filter for connections | |
de014da6 | 391 | * @const char *status@ = status string |
3cdc3f3a | 392 | * @const char *fmt@ = pointer to format string |
de014da6 | 393 | * @const char *p@ = pointer to raw string |
3cdc3f3a | 394 | * @size_t sz@ = size of raw string |
395 | * @va_list ap@ = arguments in list | |
396 | * @...@ = other arguments | |
397 | * | |
398 | * Returns: --- | |
399 | * | |
400 | * Use: Write a message to all admin connections matched by the given | |
401 | * filter. | |
402 | */ | |
403 | ||
de014da6 | 404 | static void a_rawalert(unsigned f_and, unsigned f_eq, const char *status, |
3cdc3f3a | 405 | const char *p, size_t sz) |
406 | { | |
407 | admin *a, *aa; | |
408 | dstr d = DSTR_INIT; | |
409 | ||
410 | if (!(flags & F_INIT)) | |
411 | return; | |
de014da6 | 412 | dstr_puts(&d, status); |
413 | if (p) { | |
414 | dstr_putc(&d, ' '); | |
3cdc3f3a | 415 | dstr_putm(&d, p, sz); |
de014da6 | 416 | } |
3cdc3f3a | 417 | dstr_putc(&d, '\n'); |
418 | p = d.buf; | |
419 | sz = d.len; | |
420 | for (a = admins; a; a = aa) { | |
421 | aa = a->next; | |
422 | if ((a->f & f_and) == f_eq) | |
423 | dosend(a, d.buf, d.len); | |
424 | } | |
410c8acf | 425 | dstr_destroy(&d); |
426 | } | |
427 | ||
3cdc3f3a | 428 | static void a_valert(unsigned f_and, unsigned f_eq, const char *tag, |
429 | const char *fmt, va_list ap) | |
430 | { | |
431 | dstr d = DSTR_INIT; | |
432 | ||
433 | if (!(flags & F_INIT)) | |
434 | return; | |
f43df819 | 435 | a_vformat(&d, fmt, ap); |
3cdc3f3a | 436 | a_rawalert(f_and, f_eq, tag, fmt ? d.buf : 0, fmt ? d.len : 0); |
437 | dstr_destroy(&d); | |
438 | } | |
439 | ||
440 | #if 0 /*unused*/ | |
441 | static void a_alert(unsigned f_and, unsigned f_eq, const char *tag, | |
442 | const char *fmt, ...) | |
443 | { | |
444 | va_list ap; | |
445 | va_start(ap, fmt); | |
446 | a_valert(f_and, f_eq, tag, fmt, ap); | |
447 | va_end(ap); | |
448 | } | |
449 | #endif | |
450 | ||
410c8acf | 451 | /* --- @a_warn@ --- * |
452 | * | |
453 | * Arguments: @const char *fmt@ = pointer to format string | |
454 | * @...@ = other arguments | |
455 | * | |
456 | * Returns: --- | |
457 | * | |
458 | * Use: Informs all admin connections of a warning. | |
459 | */ | |
460 | ||
461 | void a_warn(const char *fmt, ...) | |
462 | { | |
463 | va_list ap; | |
410c8acf | 464 | |
410c8acf | 465 | va_start(ap, fmt); |
3cdc3f3a | 466 | if (flags & F_INIT) |
467 | a_valert(0, 0, "WARN", fmt, ap); | |
410c8acf | 468 | else { |
f43df819 | 469 | dstr d = DSTR_INIT; |
3cdc3f3a | 470 | fprintf(stderr, "%s: ", QUIS); |
f43df819 MW |
471 | a_vformat(&d, fmt, ap); |
472 | dstr_putc(&d, '\n'); | |
473 | dstr_write(&d, stderr); | |
474 | dstr_destroy(&d); | |
410c8acf | 475 | } |
3cdc3f3a | 476 | va_end(ap); |
410c8acf | 477 | } |
478 | ||
479 | /* --- @a_trace@ --- * | |
480 | * | |
481 | * Arguments: @const char *p@ = pointer to a buffer | |
482 | * @size_t sz@ = size of the buffer | |
483 | * @void *v@ = uninteresting pointer | |
484 | * | |
485 | * Returns: --- | |
486 | * | |
3cdc3f3a | 487 | * Use: Custom trace output handler. Sends trace messages to |
488 | * interested admin connections. | |
410c8acf | 489 | */ |
490 | ||
491 | #ifndef NTRACE | |
492 | static void a_trace(const char *p, size_t sz, void *v) | |
de014da6 | 493 | { a_rawalert(AF_TRACE, AF_TRACE, "TRACE", p, sz); } |
410c8acf | 494 | #endif |
495 | ||
3cdc3f3a | 496 | /* --- @a_notify@ --- * |
497 | * | |
498 | * Arguments: @const char *fmt@ = pointer to format string | |
499 | * @...@ = other arguments | |
500 | * | |
501 | * Returns: --- | |
502 | * | |
503 | * Use: Sends a notification to interested admin connections. | |
504 | */ | |
505 | ||
506 | void a_notify(const char *fmt, ...) | |
507 | { | |
508 | va_list ap; | |
509 | ||
510 | va_start(ap, fmt); | |
511 | a_valert(AF_NOTE, AF_NOTE, "NOTE", fmt, ap); | |
512 | va_end(ap); | |
513 | } | |
514 | ||
410c8acf | 515 | /* --- @a_quit@ --- * |
516 | * | |
517 | * Arguments: --- | |
518 | * | |
519 | * Returns: --- | |
520 | * | |
521 | * Use: Shuts things down nicely. | |
522 | */ | |
523 | ||
524 | void a_quit(void) | |
525 | { | |
42da2a58 | 526 | peer *p; |
527 | ||
410c8acf | 528 | close(sock.fd); |
529 | unlink(sockname); | |
de014da6 | 530 | while ((p = p_first()) != 0) |
531 | p_destroy(p); | |
410c8acf | 532 | exit(0); |
533 | } | |
534 | ||
535 | /* --- @a_sigdie@ --- * | |
536 | * | |
537 | * Arguments: @int sig@ = signal number | |
538 | * @void *v@ = an uninteresting argument | |
539 | * | |
540 | * Returns: --- | |
541 | * | |
542 | * Use Shuts down on receipt of a fatal signal. | |
543 | */ | |
544 | ||
545 | static void a_sigdie(int sig, void *v) | |
546 | { | |
547 | char *p; | |
548 | char buf[20]; | |
549 | ||
550 | switch (sig) { | |
551 | case SIGTERM: p = "SIGTERM"; break; | |
552 | case SIGINT: p = "SIGINT"; break; | |
553 | default: | |
3cdc3f3a | 554 | sprintf(buf, "%i", sig); |
410c8acf | 555 | p = buf; |
556 | break; | |
557 | } | |
f43df819 | 558 | a_warn("SERVER", "quit", "signal", "%s", p, A_END); |
410c8acf | 559 | a_quit(); |
560 | } | |
561 | ||
562 | /* --- @a_sighup@ --- * | |
563 | * | |
564 | * Arguments: @int sig@ = signal number | |
565 | * @void *v@ = an uninteresting argument | |
566 | * | |
567 | * Returns: --- | |
568 | * | |
569 | * Use Logs a message about SIGHUP not being useful. | |
570 | */ | |
571 | ||
572 | static void a_sighup(int sig, void *v) | |
573 | { | |
f43df819 | 574 | a_warn("SERVER", "ignore", "signal", "SIGHUP", A_END); |
410c8acf | 575 | } |
576 | ||
0ba8de86 | 577 | /* --- @a_parsetime@ --- * |
578 | * | |
579 | * Arguments; @const char *p@ = time string to parse | |
580 | * | |
581 | * Returns: Time in seconds, or @< 0@ on error. | |
582 | */ | |
583 | ||
584 | static long a_parsetime(const char *p) | |
585 | { | |
586 | char *q; | |
587 | long t = strtol(p, &q, 0); | |
588 | ||
589 | switch (*q) { | |
590 | case 'd': t *= 24; | |
591 | case 'h': t *= 60; | |
592 | case 'm': t *= 60; | |
593 | case 's': if (q[1] != 0) | |
594 | default: t = -1; | |
595 | case 0: break; | |
596 | } | |
597 | return (t); | |
598 | } | |
599 | ||
37941236 | 600 | /* --- @a_findpeer@ --- * |
601 | * | |
602 | * Arguments: @admin *a@ = admin connection | |
603 | * @const char *pn@ = peer name | |
604 | * | |
605 | * Returns: The peer, or null if not there. | |
606 | * | |
607 | * Use: Finds a peer, reporting an error if it failed. | |
608 | */ | |
609 | ||
610 | static peer *a_findpeer(admin *a, const char *pn) | |
611 | { | |
612 | peer *p; | |
613 | ||
614 | if ((p = p_find(pn)) == 0) | |
f43df819 | 615 | a_fail(a, "unknown-peer", "%s", pn, A_END); |
37941236 | 616 | return (p); |
617 | } | |
618 | ||
de014da6 | 619 | /*----- Backgrounded operations -------------------------------------------*/ |
620 | ||
060ca767 | 621 | #define BGTAG(bg) \ |
622 | (((admin_bgop *)(bg))->tag ? ((admin_bgop *)(bg))->tag : "<foreground>") | |
623 | ||
de014da6 | 624 | /* --- @a_bgrelease@ --- * |
625 | * | |
626 | * Arguments: @admin_bgop *bg@ = backgrounded operation | |
627 | * | |
628 | * Returns: --- | |
629 | * | |
630 | * Use: Removes a backgrounded operation from the queue, since | |
631 | * (presumably) it's done. | |
632 | */ | |
633 | ||
634 | static void a_bgrelease(admin_bgop *bg) | |
635 | { | |
636 | admin *a = bg->a; | |
637 | ||
060ca767 | 638 | T( trace(T_ADMIN, "admin: release bgop %s", BGTAG(bg)); ) |
639 | if (bg->tag) xfree(bg->tag); | |
640 | else selbuf_enable(&a->b); | |
641 | if (bg->next) bg->next->prev = bg->prev; | |
642 | if (bg->prev) bg->prev->next = bg->next; | |
643 | else a->bg = bg->next; | |
de014da6 | 644 | xfree(bg); |
060ca767 | 645 | if (a->f & AF_CLOSE) a_destroy(a); |
646 | a_unlock(a); | |
de014da6 | 647 | } |
648 | ||
649 | /* --- @a_bgok@, @a_bginfo@, @a_bgfail@ --- * | |
650 | * | |
651 | * Arguments: @admin_bgop *bg@ = backgrounded operation | |
652 | * @const char *fmt@ = format string | |
653 | * @...@ = other arguments | |
654 | * | |
655 | * Returns: --- | |
656 | * | |
657 | * Use: Convenience functions for @a_write@. | |
658 | */ | |
659 | ||
660 | static void a_bgok(admin_bgop *bg) | |
f43df819 | 661 | { a_write(bg->a, "OK", bg->tag, A_END); } |
de014da6 | 662 | |
663 | static void a_bginfo(admin_bgop *bg, const char *fmt, ...) | |
664 | { | |
665 | va_list ap; | |
666 | va_start(ap, fmt); | |
667 | a_vwrite(bg->a, "INFO", bg->tag, fmt, ap); | |
668 | va_end(ap); | |
669 | } | |
670 | ||
671 | static void a_bgfail(admin_bgop *bg, const char *fmt, ...) | |
672 | { | |
673 | va_list ap; | |
674 | va_start(ap, fmt); | |
675 | a_vwrite(bg->a, "FAIL", bg->tag, fmt, ap); | |
676 | va_end(ap); | |
677 | } | |
678 | ||
679 | /* --- @a_bgadd@ --- * | |
680 | * | |
681 | * Arguments: @admin *a@ = administration connection | |
682 | * @admin_bgop *bg@ = pointer to background operation | |
683 | * @const char *tag@ = background tag, or null for foreground | |
684 | * @void (*cancel)(admin_bgop *)@ = cancel function | |
685 | * | |
686 | * Returns: --- | |
687 | * | |
688 | * Use: Links a background job into the list. | |
689 | */ | |
690 | ||
691 | static void a_bgadd(admin *a, admin_bgop *bg, const char *tag, | |
692 | void (*cancel)(admin_bgop *)) | |
693 | { | |
694 | if (tag) | |
695 | bg->tag = xstrdup(tag); | |
696 | else { | |
697 | bg->tag = 0; | |
698 | selbuf_disable(&a->b); | |
699 | } | |
700 | bg->a = a; | |
701 | bg->cancel = cancel; | |
702 | bg->next = a->bg; | |
703 | bg->prev = 0; | |
060ca767 | 704 | if (a->bg) a->bg->prev = bg; |
de014da6 | 705 | a->bg = bg; |
060ca767 | 706 | a_lock(a); |
707 | T( trace(T_ADMIN, "admin: add bgop %s", BGTAG(bg)); ) | |
f43df819 | 708 | if (tag) a_write(a, "DETACH", tag, A_END); |
de014da6 | 709 | } |
710 | ||
37941236 | 711 | /*----- Name resolution operations ----------------------------------------*/ |
de014da6 | 712 | |
37941236 | 713 | /* --- @a_resolved@ --- * |
de014da6 | 714 | * |
37941236 | 715 | * Arguments: @struct hostent *h@ = pointer to resolved hostname |
716 | * @void *v@ = pointer to resolver operation | |
de014da6 | 717 | * |
718 | * Returns: --- | |
719 | * | |
37941236 | 720 | * Use: Handles a completed name resolution. |
de014da6 | 721 | */ |
722 | ||
37941236 | 723 | static void a_resolved(struct hostent *h, void *v) |
de014da6 | 724 | { |
37941236 | 725 | admin_resop *r = v; |
726 | ||
727 | T( trace(T_ADMIN, "admin: resop %s resolved", BGTAG(r)); ) | |
728 | TIMER; | |
729 | if (!h) { | |
f43df819 | 730 | a_bgfail(&r->bg, "resolve-error", "%s", r->addr, A_END); |
37941236 | 731 | r->func(r, ARES_FAIL); |
732 | } else { | |
733 | memcpy(&r->sa.sin.sin_addr, h->h_addr, sizeof(struct in_addr)); | |
734 | r->func(r, ARES_OK); | |
735 | } | |
736 | sel_rmtimer(&r->t); | |
737 | xfree(r->addr); | |
738 | a_bgrelease(&r->bg); | |
739 | } | |
de014da6 | 740 | |
37941236 | 741 | /* --- @a_restimer@ --- * |
de014da6 | 742 | * |
37941236 | 743 | * Arguments: @struct timeval *tv@ = timer |
744 | * @void *v@ = pointer to resolver operation | |
de014da6 | 745 | * |
746 | * Returns: --- | |
747 | * | |
37941236 | 748 | * Use: Times out a resolver. |
de014da6 | 749 | */ |
750 | ||
37941236 | 751 | static void a_restimer(struct timeval *tv, void *v) |
de014da6 | 752 | { |
37941236 | 753 | admin_resop *r = v; |
754 | ||
755 | T( trace(T_ADMIN, "admin: resop %s timeout", BGTAG(r)); ) | |
f43df819 | 756 | a_bgfail(&r->bg, "resolver-timeout", "%s", r->addr, A_END); |
37941236 | 757 | r->func(r, ARES_FAIL); |
758 | bres_abort(&r->r); | |
759 | xfree(r->addr); | |
760 | a_bgrelease(&r->bg); | |
de014da6 | 761 | } |
762 | ||
37941236 | 763 | /* --- @a_rescancel@ --- * |
de014da6 | 764 | * |
37941236 | 765 | * Arguments: @admin_bgop *bg@ = background operation |
de014da6 | 766 | * |
767 | * Returns: --- | |
768 | * | |
37941236 | 769 | * Use: Cancels an add operation. |
de014da6 | 770 | */ |
771 | ||
37941236 | 772 | static void a_rescancel(admin_bgop *bg) |
de014da6 | 773 | { |
37941236 | 774 | admin_resop *r = (admin_resop *)bg; |
775 | ||
776 | T( trace(T_ADMIN, "admin: cancel resop %s", BGTAG(r)); ) | |
777 | r->func(r, ARES_FAIL); | |
778 | sel_rmtimer(&r->t); | |
779 | xfree(r->addr); | |
780 | bres_abort(&r->r); | |
de014da6 | 781 | } |
37941236 | 782 | |
783 | /* --- @a_resolve@ --- * | |
410c8acf | 784 | * |
37941236 | 785 | * Arguments: @admin *a@ = administration connection |
786 | * @admin_resop *r@ = resolver operation to run | |
787 | * @const char *tag@ = background operation tag | |
788 | * @void (*func)(struct admin_resop *, int@ = handler function | |
789 | * @unsigned ac@ = number of remaining arguments | |
790 | * @char *av[]@ = pointer to remaining arguments | |
410c8acf | 791 | * |
792 | * Returns: --- | |
793 | * | |
37941236 | 794 | * Use: Cranks up a resolver job. |
410c8acf | 795 | */ |
796 | ||
37941236 | 797 | static void a_resolve(admin *a, admin_resop *r, const char *tag, |
798 | void (*func)(struct admin_resop *, int), | |
799 | unsigned ac, char *av[]) | |
410c8acf | 800 | { |
37941236 | 801 | struct timeval tv; |
802 | unsigned long pt; | |
803 | char *p; | |
804 | int i = 0; | |
fd3cf232 | 805 | |
37941236 | 806 | /* --- Fill in the easy bits of address --- */ |
807 | ||
452bf3f6 | 808 | r->bg.tag = "<starting>"; |
37941236 | 809 | r->addr = 0; |
810 | r->func = func; | |
811 | if (mystrieq(av[i], "inet")) i++; | |
812 | if (ac - i != 2) { | |
f43df819 | 813 | a_fail(a, "bad-addr-syntax", "[inet] ADDRESS PORT", A_END); |
37941236 | 814 | goto fail; |
815 | } | |
816 | r->sa.sin.sin_family = AF_INET; | |
817 | r->sasz = sizeof(r->sa.sin); | |
818 | r->addr = xstrdup(av[i]); | |
819 | pt = strtoul(av[i + 1], &p, 0); | |
820 | if (*p) { | |
821 | struct servent *s = getservbyname(av[i + 1], "udp"); | |
822 | if (!s) { | |
f43df819 | 823 | a_fail(a, "unknown-service", "%s", av[i + 1], A_END); |
37941236 | 824 | goto fail; |
825 | } | |
826 | pt = ntohs(s->s_port); | |
410c8acf | 827 | } |
37941236 | 828 | if (pt == 0 || pt >= 65536) { |
f43df819 | 829 | a_fail(a, "invalid-port", "%lu", pt, A_END); |
37941236 | 830 | goto fail; |
831 | } | |
832 | r->sa.sin.sin_port = htons(pt); | |
833 | ||
834 | /* --- Report backgrounding --- * | |
835 | * | |
836 | * Do this for consistency of interface, even if we're going to get the | |
837 | * answer straight away. | |
838 | */ | |
839 | ||
840 | a_bgadd(a, &r->bg, tag, a_rescancel); | |
841 | T( trace(T_ADMIN, "admin: %u, resop %s, hostname `%s'", | |
842 | a->seq, BGTAG(r), r->addr); ) | |
843 | ||
844 | /* --- If the name is numeric, do it the easy way --- */ | |
845 | ||
846 | if (inet_aton(av[i], &r->sa.sin.sin_addr)) { | |
847 | T( trace(T_ADMIN, "admin: resop %s done the easy way", BGTAG(r)); ) | |
848 | func(r, ARES_OK); | |
849 | xfree(r->addr); | |
850 | a_bgrelease(&r->bg); | |
851 | return; | |
852 | } | |
853 | ||
854 | /* --- Store everything for later and crank up the resolver --- */ | |
855 | ||
856 | gettimeofday(&tv, 0); | |
857 | tv.tv_sec += T_RESOLVE; | |
858 | sel_addtimer(&sel, &r->t, &tv, a_restimer, r); | |
859 | bres_byname(&r->r, r->addr, a_resolved, r); | |
860 | return; | |
861 | ||
862 | fail: | |
863 | func(r, ARES_FAIL); | |
864 | if (r->addr) xfree(r->addr); | |
865 | xfree(r); | |
410c8acf | 866 | } |
867 | ||
37941236 | 868 | /*----- Adding peers ------------------------------------------------------*/ |
869 | ||
870 | /* --- @a_doadd@ --- * | |
410c8acf | 871 | * |
37941236 | 872 | * Arguments: @admin_resop *r@ = resolver operation |
873 | * @int rc@ = how it worked | |
410c8acf | 874 | * |
875 | * Returns: --- | |
876 | * | |
37941236 | 877 | * Use: Handles a completed resolution. |
410c8acf | 878 | */ |
879 | ||
37941236 | 880 | static void a_doadd(admin_resop *r, int rc) |
410c8acf | 881 | { |
37941236 | 882 | admin_addop *add = (admin_addop *)r; |
883 | ||
884 | T( trace(T_ADMIN, "admin: done add op %s", BGTAG(add)); ) | |
885 | ||
886 | if (rc == ARES_OK) { | |
887 | add->peer.sasz = add->r.sasz; | |
888 | add->peer.sa = add->r.sa; | |
889 | if (p_find(add->peer.name)) | |
f43df819 | 890 | a_bgfail(&add->r.bg, "peer-exists", "%s", add->peer.name, A_END); |
37941236 | 891 | else if (!p_create(&add->peer)) |
f43df819 | 892 | a_bgfail(&add->r.bg, "peer-create-fail", "%s", add->peer.name, A_END); |
37941236 | 893 | else |
894 | a_bgok(&add->r.bg); | |
895 | } | |
de014da6 | 896 | |
37941236 | 897 | xfree(add->peer.name); |
410c8acf | 898 | } |
899 | ||
900 | /* --- @acmd_add@ --- * | |
901 | * | |
902 | * Arguments: @admin *a@ = connection which requested the addition | |
903 | * @unsigned ac@ = argument count | |
904 | * @char *av[]@ = pointer to the argument list | |
905 | * | |
906 | * Returns: --- | |
907 | * | |
908 | * Use: Adds a new peer. | |
909 | */ | |
910 | ||
911 | static void acmd_add(admin *a, unsigned ac, char *av[]) | |
912 | { | |
42da2a58 | 913 | unsigned i, j; |
de014da6 | 914 | const char *tag = 0; |
915 | admin_addop *add = 0; | |
410c8acf | 916 | |
0ba8de86 | 917 | /* --- Set stuff up --- */ |
918 | ||
de014da6 | 919 | add = xmalloc(sizeof(*add)); |
920 | add->peer.name = xstrdup(av[0]); | |
921 | add->peer.t_ka = 0; | |
922 | add->peer.tops = tun_default; | |
37941236 | 923 | |
924 | /* --- Make sure someone's not got there already --- */ | |
925 | ||
926 | if (p_find(av[0])) { | |
f43df819 | 927 | a_fail(a, "peer-exists", "%s", av[0], A_END); |
37941236 | 928 | goto fail; |
929 | } | |
0ba8de86 | 930 | |
42da2a58 | 931 | /* --- Parse options --- */ |
932 | ||
933 | i = 1; | |
934 | for (;;) { | |
935 | if (!av[i]) | |
936 | goto bad_syntax; | |
de014da6 | 937 | if (mystrieq(av[i], "-background")) { |
938 | if (!av[++i]) goto bad_syntax; | |
939 | tag = av[i]; | |
940 | } else if (mystrieq(av[i], "-tunnel")) { | |
0ba8de86 | 941 | if (!av[++i]) goto bad_syntax; |
42da2a58 | 942 | for (j = 0;; j++) { |
943 | if (!tunnels[j]) { | |
f43df819 | 944 | a_fail(a, "unknown-tunnel", "%s", av[i], A_END); |
37941236 | 945 | goto fail; |
42da2a58 | 946 | } |
947 | if (mystrieq(av[i], tunnels[j]->name)) { | |
de014da6 | 948 | add->peer.tops = tunnels[j]; |
42da2a58 | 949 | break; |
950 | } | |
951 | } | |
0ba8de86 | 952 | } else if (mystrieq(av[i], "-keepalive")) { |
953 | long t; | |
954 | if (!av[++i]) goto bad_syntax; | |
955 | if ((t = a_parsetime(av[i])) < 0) { | |
f43df819 | 956 | a_fail(a, "bad-time-spec", "%s", av[i], A_END); |
37941236 | 957 | goto fail; |
0ba8de86 | 958 | } |
de014da6 | 959 | add->peer.t_ka = t; |
42da2a58 | 960 | } else if (mystrieq(av[i], "--")) { |
961 | i++; | |
962 | break; | |
963 | } else | |
964 | break; | |
0ba8de86 | 965 | i++; |
42da2a58 | 966 | } |
967 | ||
37941236 | 968 | /* --- Crank up the resolver --- */ |
de014da6 | 969 | |
37941236 | 970 | a_resolve(a, &add->r, tag, a_doadd, ac - i, av + i); |
42da2a58 | 971 | return; |
972 | ||
37941236 | 973 | /* --- Clearing up --- */ |
974 | ||
42da2a58 | 975 | bad_syntax: |
f43df819 | 976 | a_fail(a, "bad-syntax", "add", "PEER [OPTIONS] ADDR ...", A_END); |
de014da6 | 977 | fail: |
37941236 | 978 | xfree(add->peer.name); |
979 | xfree(add); | |
0ba8de86 | 980 | return; |
981 | } | |
982 | ||
983 | /*----- Ping --------------------------------------------------------------*/ | |
984 | ||
de014da6 | 985 | /* --- @a_pingcancel@ --- * |
986 | * | |
987 | * Arguments: @admin_bgop *bg@ = background operation block | |
988 | * | |
989 | * Returns: --- | |
990 | * | |
991 | * Use: Cancels a running ping. | |
992 | */ | |
993 | ||
994 | static void a_pingcancel(admin_bgop *bg) | |
995 | { | |
996 | admin_pingop *pg = (admin_pingop *)bg; | |
060ca767 | 997 | T( trace(T_ADMIN, "admin: cancel ping op %s", BGTAG(pg)); ) |
de014da6 | 998 | p_pingdone(&pg->ping, PING_NONOTIFY); |
999 | } | |
1000 | ||
0ba8de86 | 1001 | /* --- @a_pong@ --- * |
1002 | * | |
1003 | * Arguments: @int rc@ = return code | |
de014da6 | 1004 | * @void *v@ = ping operation block |
0ba8de86 | 1005 | * |
1006 | * Returns: --- | |
1007 | * | |
1008 | * Use: Collects what happened to a ping message. | |
1009 | */ | |
1010 | ||
de014da6 | 1011 | static void a_pong(int rc, void *v) |
0ba8de86 | 1012 | { |
de014da6 | 1013 | admin_pingop *pg = v; |
0ba8de86 | 1014 | struct timeval tv; |
1015 | double millis; | |
1016 | ||
0ba8de86 | 1017 | switch (rc) { |
1018 | case PING_OK: | |
1019 | gettimeofday(&tv, 0); | |
de014da6 | 1020 | tv_sub(&tv, &tv, &pg->pingtime); |
0ba8de86 | 1021 | millis = (double)tv.tv_sec * 1000 + (double)tv.tv_usec/1000; |
f43df819 | 1022 | a_bginfo(&pg->bg, "ping-ok", "%.1f", millis, A_END); |
de014da6 | 1023 | a_bgok(&pg->bg); |
0ba8de86 | 1024 | break; |
1025 | case PING_TIMEOUT: | |
f43df819 | 1026 | a_bginfo(&pg->bg, "ping-timeout", A_END); |
de014da6 | 1027 | a_bgok(&pg->bg); |
0ba8de86 | 1028 | break; |
1029 | case PING_PEERDIED: | |
f43df819 | 1030 | a_bginfo(&pg->bg, "ping-peer-died", A_END); |
de014da6 | 1031 | a_bgok(&pg->bg); |
0ba8de86 | 1032 | break; |
1033 | default: | |
1034 | abort(); | |
1035 | } | |
060ca767 | 1036 | T( trace(T_ADMIN, "admin: ponged ping op %s", BGTAG(pg)); ) |
de014da6 | 1037 | a_bgrelease(&pg->bg); |
0ba8de86 | 1038 | } |
1039 | ||
1040 | /* --- @acmd_ping@, @acmd_eping@ --- * | |
1041 | * | |
1042 | * Arguments: @admin *a@ = connection which requested the ping | |
1043 | * @unsigned ac@ = argument count | |
1044 | * @char *av[]@ = pointer to the argument list | |
1045 | * | |
1046 | * Returns: --- | |
1047 | * | |
1048 | * Use: Pings a peer. | |
1049 | */ | |
1050 | ||
1051 | static void a_ping(admin *a, unsigned ac, char *av[], | |
1052 | const char *cmd, unsigned msg) | |
1053 | { | |
1054 | long t = T_PING; | |
1055 | int i; | |
1056 | peer *p; | |
de014da6 | 1057 | admin_pingop *pg = 0; |
1058 | const char *tag = 0; | |
0ba8de86 | 1059 | |
1060 | i = 0; | |
1061 | for (;;) { | |
1062 | if (!av[i]) | |
1063 | goto bad_syntax; | |
de014da6 | 1064 | if (mystrieq(av[i], "-background")) { |
1065 | if (!av[++i]) goto bad_syntax; | |
1066 | tag = av[i]; | |
1067 | } else if (mystrieq(av[i], "-timeout")) { | |
0ba8de86 | 1068 | if (!av[++i]) goto bad_syntax; |
1069 | if ((t = a_parsetime(av[i])) < 0) { | |
f43df819 | 1070 | a_fail(a, "bad-time-spec", "%s", av[i], A_END); |
0ba8de86 | 1071 | return; |
1072 | } | |
1073 | } else if (mystrieq(av[i], "--")) { | |
1074 | i++; | |
1075 | break; | |
1076 | } else | |
1077 | break; | |
1078 | i++; | |
1079 | } | |
1080 | ||
1081 | if (!av[i]) goto bad_syntax; | |
37941236 | 1082 | if ((p = a_findpeer(a, av[i])) == 0) |
0ba8de86 | 1083 | return; |
de014da6 | 1084 | pg = xmalloc(sizeof(*pg)); |
1085 | gettimeofday(&pg->pingtime, 0); | |
1086 | a_bgadd(a, &pg->bg, tag, a_pingcancel); | |
060ca767 | 1087 | T( trace(T_ADMIN, "admin: ping op %s: %s to %s", |
1088 | BGTAG(pg), cmd, p_name(p)); ) | |
de014da6 | 1089 | if (p_pingsend(p, &pg->ping, msg, t, a_pong, pg)) { |
f43df819 | 1090 | a_bgfail(&pg->bg, "ping-send-failed", A_END); |
de014da6 | 1091 | a_bgrelease(&pg->bg); |
1092 | } | |
0ba8de86 | 1093 | return; |
1094 | ||
1095 | bad_syntax: | |
f43df819 | 1096 | a_fail(a, "bad-syntax", "%s", cmd, "[OPTIONS] PEER", cmd, A_END); |
42da2a58 | 1097 | return; |
410c8acf | 1098 | } |
1099 | ||
0ba8de86 | 1100 | static void acmd_ping(admin *a, unsigned ac, char *av[]) |
1101 | { a_ping(a, ac, av, "ping", MISC_PING); } | |
1102 | static void acmd_eping(admin *a, unsigned ac, char *av[]) | |
1103 | { a_ping(a, ac, av, "eping", MISC_EPING); } | |
0ba8de86 | 1104 | |
410c8acf | 1105 | /*----- Administration commands -------------------------------------------*/ |
1106 | ||
1107 | /* --- Miscellaneous commands --- */ | |
1108 | ||
3cdc3f3a | 1109 | /* --- @traceish@ --- * |
1110 | * | |
1111 | * Arguments: @admin *a@ = connection to complain on | |
1112 | * @unsigned ac@ = number of arguments | |
1113 | * @char *av[]@ = vector of arguments | |
1114 | * @const char *what@ = what we're messing with | |
1115 | * @const trace_opt *tt@ = options table | |
1116 | * @unsigned *ff@ = where the flags are | |
1117 | * | |
1118 | * Returns: Nonzero if anything changed. | |
1119 | * | |
1120 | * Use: Guts of trace-ish commands like `trace' and `watch'. | |
1121 | */ | |
410c8acf | 1122 | |
3cdc3f3a | 1123 | static int traceish(admin *a, unsigned ac, char *av[], |
1124 | const char *what, const trace_opt *tt, unsigned *ff) | |
410c8acf | 1125 | { |
3cdc3f3a | 1126 | int ch = 0; |
1127 | ||
410c8acf | 1128 | if (!ac || strcmp(av[0], "?") == 0) { |
1129 | const trace_opt *t; | |
3cdc3f3a | 1130 | for (t = tt; t->ch; t++) { |
f43df819 MW |
1131 | a_info(a, "*%c%c %s", |
1132 | t->ch, (*ff & t->f) == t->f ? '+' : ' ', t->help, A_END); | |
410c8acf | 1133 | } |
1134 | } else { | |
1135 | unsigned sense = 1; | |
3cdc3f3a | 1136 | unsigned f = *ff; |
1137 | const trace_opt *t; | |
410c8acf | 1138 | char *p = av[0]; |
1139 | ||
1140 | while (*p) { | |
1141 | switch (*p) { | |
1142 | case '+': sense = 1; break; | |
1143 | case '-': sense = 0; break; | |
1144 | default: | |
3cdc3f3a | 1145 | for (t = tt; t->ch; t++) { |
1146 | if (t->ch == *p) { | |
1147 | if (sense) f |= t->f; | |
1148 | else f &= ~t->f; | |
410c8acf | 1149 | goto tropt_ok; |
1150 | } | |
1151 | } | |
f43df819 | 1152 | a_fail(a, "bad-%s-option", what, "%c", *p, A_END); |
3cdc3f3a | 1153 | return (0); |
410c8acf | 1154 | tropt_ok:; |
1155 | break; | |
1156 | } | |
1157 | p++; | |
1158 | } | |
3cdc3f3a | 1159 | *ff = f; |
1160 | ch = 1; | |
410c8acf | 1161 | } |
3cdc3f3a | 1162 | a_ok(a); |
1163 | return (ch); | |
1164 | } | |
1165 | ||
1166 | #ifndef NTRACE | |
1167 | ||
1168 | static void acmd_trace(admin *a, unsigned ac, char *av[]) | |
1169 | { | |
1170 | if (traceish(a, ac, av, "trace", tr_opts, &tr_flags)) | |
1171 | trace_level(tr_flags); | |
410c8acf | 1172 | } |
1173 | ||
1174 | #endif | |
1175 | ||
3cdc3f3a | 1176 | static void acmd_watch(admin *a, unsigned ac, char *av[]) |
1177 | { | |
1178 | traceish(a, ac, av, "watch", w_opts, &a->f); | |
1179 | } | |
1180 | ||
3cdc3f3a | 1181 | static void alertcmd(admin *a, unsigned f_and, unsigned f_eq, |
1182 | const char *tag, unsigned ac, char *av[]) | |
1183 | { | |
1184 | dstr d = DSTR_INIT; | |
1185 | unsigned i; | |
1186 | ||
1187 | dstr_puts(&d, "USER"); | |
1188 | for (i = 0; i < ac; i++) | |
1189 | quotify(&d, av[i]); | |
1190 | dstr_putz(&d); | |
1191 | a_rawalert(f_and, f_eq, tag, d.buf, d.len); | |
1192 | dstr_destroy(&d); | |
1193 | a_ok(a); | |
1194 | } | |
1195 | ||
1196 | static void acmd_notify(admin *a, unsigned ac, char *av[]) | |
1197 | { alertcmd(a, AF_NOTE, AF_NOTE, "NOTE", ac, av); } | |
1198 | static void acmd_warn(admin *a, unsigned ac, char *av[]) | |
1199 | { alertcmd(a, AF_WARN, AF_WARN, "WARN", ac, av); } | |
1200 | ||
410c8acf | 1201 | static void acmd_port(admin *a, unsigned ac, char *av[]) |
1202 | { | |
f43df819 | 1203 | a_info(a, "%u", p_port(), A_END); |
3cdc3f3a | 1204 | a_ok(a); |
410c8acf | 1205 | } |
1206 | ||
410c8acf | 1207 | static void acmd_daemon(admin *a, unsigned ac, char *av[]) |
1208 | { | |
1209 | if (flags & F_DAEMON) | |
f43df819 | 1210 | a_fail(a, "already-daemon", A_END); |
410c8acf | 1211 | else { |
f43df819 | 1212 | a_notify("DAEMON", A_END); |
93bee2c4 | 1213 | if (a_stdin) |
410c8acf | 1214 | a_destroy(a_stdin); |
410c8acf | 1215 | if (u_daemon()) |
f43df819 | 1216 | a_fail(a, "daemon-error", "?ERRNO", A_END); |
93bee2c4 | 1217 | else { |
410c8acf | 1218 | flags |= F_DAEMON; |
3cdc3f3a | 1219 | a_ok(a); |
93bee2c4 | 1220 | } |
410c8acf | 1221 | } |
1222 | } | |
1223 | ||
1224 | static void acmd_list(admin *a, unsigned ac, char *av[]) | |
1225 | { | |
1226 | peer *p; | |
1227 | for (p = p_first(); p; p = p_next(p)) | |
f43df819 | 1228 | a_info(a, "%s", p_name(p), A_END); |
3cdc3f3a | 1229 | a_ok(a); |
410c8acf | 1230 | } |
1231 | ||
1232 | static void acmd_ifname(admin *a, unsigned ac, char *av[]) | |
1233 | { | |
1234 | peer *p; | |
1235 | ||
37941236 | 1236 | if ((p = a_findpeer(a, av[0])) != 0) { |
f43df819 | 1237 | a_info(a, "%s", p_ifname(p), A_END); |
3cdc3f3a | 1238 | a_ok(a); |
1239 | } | |
410c8acf | 1240 | } |
1241 | ||
37941236 | 1242 | static void acmd_getchal(admin *a, unsigned ac, char *av[]) |
1243 | { | |
1244 | buf b; | |
1245 | ||
1246 | buf_init(&b, buf_i, PKBUFSZ); | |
1247 | c_new(&b); | |
f43df819 | 1248 | a_info(a, "?B64", BBASE(&b), (size_t)BLEN(&b), A_END); |
37941236 | 1249 | a_ok(a); |
1250 | } | |
1251 | ||
1252 | static void acmd_checkchal(admin *a, unsigned ac, char *av[]) | |
1253 | { | |
1254 | base64_ctx b64; | |
1255 | buf b; | |
1256 | dstr d = DSTR_INIT; | |
1257 | ||
1258 | base64_init(&b64); | |
1259 | base64_decode(&b64, av[0], strlen(av[0]), &d); | |
1260 | base64_decode(&b64, 0, 0, &d); | |
1261 | buf_init(&b, d.buf, d.len); | |
1262 | if (c_check(&b) || BBAD(&b) || BLEFT(&b)) | |
f43df819 | 1263 | a_fail(a, "invalid-challenge", A_END); |
37941236 | 1264 | else |
1265 | a_ok(a); | |
1266 | dstr_destroy(&d); | |
1267 | } | |
1268 | ||
1269 | static void acmd_greet(admin *a, unsigned ac, char *av[]) | |
1270 | { | |
1271 | peer *p; | |
1272 | base64_ctx b64; | |
1273 | dstr d = DSTR_INIT; | |
1274 | ||
1275 | if ((p = a_findpeer(a, av[0])) != 0) { | |
1276 | base64_init(&b64); | |
1277 | base64_decode(&b64, av[1], strlen(av[1]), &d); | |
1278 | base64_decode(&b64, 0, 0, &d); | |
1279 | p_greet(p, d.buf, d.len); | |
1280 | dstr_destroy(&d); | |
1281 | a_ok(a); | |
1282 | } | |
1283 | } | |
1284 | ||
410c8acf | 1285 | static void acmd_addr(admin *a, unsigned ac, char *av[]) |
1286 | { | |
1287 | peer *p; | |
1288 | const addr *ad; | |
1289 | ||
37941236 | 1290 | if ((p = a_findpeer(a, av[0])) != 0) { |
410c8acf | 1291 | ad = p_addr(p); |
1292 | assert(ad->sa.sa_family == AF_INET); | |
f43df819 | 1293 | a_info(a, "?ADDR", ad, A_END); |
3cdc3f3a | 1294 | a_ok(a); |
410c8acf | 1295 | } |
1296 | } | |
1297 | ||
060ca767 | 1298 | static void acmd_peerinfo(admin *a, unsigned ac, char *av[]) |
1299 | { | |
1300 | peer *p; | |
1301 | const peerspec *ps; | |
1302 | ||
37941236 | 1303 | if ((p = a_findpeer(a, av[0])) != 0) { |
1304 | ps = p_spec(p); | |
f43df819 MW |
1305 | a_info(a, "tunnel=%s", ps->tops->name, A_END); |
1306 | a_info(a, "keepalive=%lu", ps->t_ka, A_END); | |
37941236 | 1307 | a_ok(a); |
060ca767 | 1308 | } |
060ca767 | 1309 | } |
1310 | ||
1311 | static void acmd_servinfo(admin *a, unsigned ac, char *av[]) | |
1312 | { | |
f43df819 MW |
1313 | a_info(a, "implementation=edgeware-tripe", A_END); |
1314 | a_info(a, "version=%s", VERSION, A_END); | |
1315 | a_info(a, "daemon=%s", BOOL(flags & F_DAEMON), A_END); | |
060ca767 | 1316 | a_ok(a); |
1317 | } | |
1318 | ||
c7053da9 | 1319 | static void acmd_stats(admin *a, unsigned ac, char *av[]) |
1320 | { | |
1321 | peer *p; | |
1322 | stats *st; | |
1323 | ||
37941236 | 1324 | if ((p = a_findpeer(a, av[0])) == 0) |
060ca767 | 1325 | return; |
060ca767 | 1326 | |
1327 | st = p_stats(p); | |
f43df819 MW |
1328 | a_info(a, "start-time=%s", timestr(st->t_start), A_END); |
1329 | a_info(a, "last-packet-time=%s", timestr(st->t_last), A_END); | |
1330 | a_info(a, "last-keyexch-time=%s", timestr(st->t_kx), A_END); | |
1331 | a_info(a, "packets-in=%lu bytes-in=%lu", st->n_in, st->sz_in, A_END); | |
060ca767 | 1332 | a_info(a, "packets-out=%lu bytes-out=%lu", |
f43df819 | 1333 | st->n_out, st->sz_out, A_END); |
060ca767 | 1334 | a_info(a, "keyexch-packets-in=%lu keyexch-bytes-in=%lu", |
f43df819 | 1335 | st->n_kxin, st->sz_kxin, A_END); |
060ca767 | 1336 | a_info(a, "keyexch-packets-out=%lu keyexch-bytes-out=%lu", |
f43df819 | 1337 | st->n_kxout, st->sz_kxout, A_END); |
060ca767 | 1338 | a_info(a, "ip-packets-in=%lu ip-bytes-in=%lu", |
f43df819 | 1339 | st->n_ipin, st->sz_ipin, A_END); |
060ca767 | 1340 | a_info(a, "ip-packets-out=%lu ip-bytes-out=%lu", |
f43df819 MW |
1341 | st->n_ipout, st->sz_ipout, A_END); |
1342 | a_info(a, "rejected-packets=%lu", st->n_reject, A_END); | |
060ca767 | 1343 | a_ok(a); |
c7053da9 | 1344 | } |
1345 | ||
410c8acf | 1346 | static void acmd_kill(admin *a, unsigned ac, char *av[]) |
1347 | { | |
1348 | peer *p; | |
37941236 | 1349 | if ((p = a_findpeer(a, av[0])) != 0) { |
410c8acf | 1350 | p_destroy(p); |
3cdc3f3a | 1351 | a_ok(a); |
410c8acf | 1352 | } |
1353 | } | |
1354 | ||
0ba8de86 | 1355 | static void acmd_forcekx(admin *a, unsigned ac, char *av[]) |
1356 | { | |
1357 | peer *p; | |
37941236 | 1358 | if ((p = a_findpeer(a, av[0])) != 0) { |
de014da6 | 1359 | kx_start(&p->kx, 1); |
0ba8de86 | 1360 | a_ok(a); |
1361 | } | |
1362 | } | |
1363 | ||
de014da6 | 1364 | static void acmd_reload(admin *a, unsigned ac, char *av[]) |
1365 | { p_keyreload(); a_ok(a); } | |
1366 | ||
410c8acf | 1367 | static void acmd_quit(admin *a, unsigned ac, char *av[]) |
1368 | { | |
f43df819 | 1369 | a_warn("SERVER", "quit", "admin-request", A_END); |
3cdc3f3a | 1370 | a_ok(a); |
de014da6 | 1371 | a_unlock(a); |
410c8acf | 1372 | a_quit(); |
1373 | } | |
1374 | ||
3cdc3f3a | 1375 | static void acmd_version(admin *a, unsigned ac, char *av[]) |
1376 | { | |
f43df819 | 1377 | a_info(a, "%s", PACKAGE, "%s", VERSION, A_END); |
3cdc3f3a | 1378 | a_ok(a); |
1379 | } | |
1380 | ||
42da2a58 | 1381 | static void acmd_tunnels(admin *a, unsigned ac, char *av[]) |
1382 | { | |
1383 | int i; | |
1384 | for (i = 0; tunnels[i]; i++) | |
f43df819 | 1385 | a_info(a, "%s", tunnels[i]->name, A_END); |
42da2a58 | 1386 | a_ok(a); |
1387 | } | |
1388 | ||
410c8acf | 1389 | /* --- The command table and help --- */ |
1390 | ||
1391 | typedef struct acmd { | |
1392 | const char *name; | |
1393 | const char *help; | |
1394 | unsigned argmin, argmax; | |
1395 | void (*func)(admin */*a*/, unsigned /*ac*/, char */*av*/[]); | |
1396 | } acmd; | |
1397 | ||
1398 | static void acmd_help(admin */*a*/, unsigned /*ac*/, char */*av*/[]); | |
1399 | ||
1400 | static const acmd acmdtab[] = { | |
f43df819 MW |
1401 | { "add", "PEER [OPTIONS] ADDR ...", 2, 0xffff, acmd_add }, |
1402 | { "addr", "PEER", 1, 1, acmd_addr }, | |
1403 | { "checkchal", "CHAL", 1, 1, acmd_checkchal }, | |
1404 | { "daemon", 0, 0, 0, acmd_daemon }, | |
1405 | { "eping", "[OPTIONS] PEER", 1, 0xffff, acmd_eping }, | |
1406 | { "forcekx", "PEER", 1, 1, acmd_forcekx }, | |
1407 | { "getchal", 0, 0, 0, acmd_getchal }, | |
1408 | { "greet", "PEER CHAL", 2, 2, acmd_greet }, | |
1409 | { "help", 0, 0, 0, acmd_help }, | |
1410 | { "ifname", "PEER", 1, 1, acmd_ifname }, | |
1411 | { "kill", "PEER", 1, 1, acmd_kill }, | |
1412 | { "list", 0, 0, 0, acmd_list }, | |
1413 | { "notify", "MESSAGE ...", 1, 0xffff, acmd_notify }, | |
1414 | { "peerinfo", "PEER", 1, 1, acmd_peerinfo }, | |
1415 | { "ping", "[OPTIONS] PEER", 1, 0xffff, acmd_ping }, | |
1416 | { "port", 0, 0, 0, acmd_port }, | |
1417 | { "quit", 0, 0, 0, acmd_quit }, | |
1418 | { "reload", 0, 0, 0, acmd_reload }, | |
1419 | { "servinfo", 0, 0, 0, acmd_servinfo }, | |
1420 | { "stats", "PEER", 1, 1, acmd_stats }, | |
de014da6 | 1421 | #ifndef NTRACE |
f43df819 | 1422 | { "trace", "[OPTIONS]", 0, 1, acmd_trace }, |
de014da6 | 1423 | #endif |
f43df819 MW |
1424 | { "tunnels", 0, 0, 0, acmd_tunnels }, |
1425 | { "version", 0, 0, 0, acmd_version }, | |
1426 | { "warn", "MESSAGE ...", 1, 0xffff, acmd_warn }, | |
1427 | { "watch", "[OPTIONS]", 0, 1, acmd_watch }, | |
410c8acf | 1428 | { 0, 0, 0, 0, 0 } |
1429 | }; | |
1430 | ||
1431 | static void acmd_help(admin *a, unsigned ac, char *av[]) | |
1432 | { | |
1433 | const acmd *c; | |
f43df819 MW |
1434 | for (c = acmdtab; c->name; c++) { |
1435 | if (c->help) | |
1436 | a_info(a, "%s", c->name, "*%s", c->help, A_END); | |
1437 | else | |
1438 | a_info(a, "%s", c->name, A_END); | |
1439 | } | |
3cdc3f3a | 1440 | a_ok(a); |
410c8acf | 1441 | } |
1442 | ||
1443 | /*----- Connection handling -----------------------------------------------*/ | |
1444 | ||
fd3cf232 | 1445 | /* --- @a_lock@ --- * |
410c8acf | 1446 | * |
1447 | * Arguments: @admin *a@ = pointer to an admin block | |
1448 | * | |
1449 | * Returns: --- | |
1450 | * | |
fd3cf232 | 1451 | * Use: Locks an admin block so that it won't be destroyed |
1452 | * immediately. | |
410c8acf | 1453 | */ |
1454 | ||
060ca767 | 1455 | static void a_lock(admin *a) { a->ref++; } |
fd3cf232 | 1456 | |
060ca767 | 1457 | /* --- @a_dodestroy@ --- * |
fd3cf232 | 1458 | * |
1459 | * Arguments: @admin *a@ = pointer to an admin block | |
1460 | * | |
1461 | * Returns: --- | |
1462 | * | |
060ca767 | 1463 | * Use: Actually does the legwork of destroying an admin block. |
fd3cf232 | 1464 | */ |
1465 | ||
060ca767 | 1466 | static void a_dodestroy(admin *a) |
410c8acf | 1467 | { |
de014da6 | 1468 | admin_bgop *bg, *bbg; |
de014da6 | 1469 | |
fd3cf232 | 1470 | T( trace(T_ADMIN, "admin: completing destruction of connection %u", |
1471 | a->seq); ) | |
1472 | ||
410c8acf | 1473 | selbuf_destroy(&a->b); |
de014da6 | 1474 | for (bg = a->bg; bg; bg = bbg) { |
1475 | bbg = bg->next; | |
1476 | bg->cancel(bg); | |
1477 | if (bg->tag) xfree(bg->tag); | |
1478 | xfree(bg); | |
410c8acf | 1479 | } |
de014da6 | 1480 | if (a->b.reader.fd != a->w.fd) close(a->b.reader.fd); |
fd3cf232 | 1481 | close(a->w.fd); |
1482 | ||
1483 | if (a_stdin == a) | |
1484 | a_stdin = 0; | |
410c8acf | 1485 | if (a->next) |
1486 | a->next->prev = a->prev; | |
1487 | if (a->prev) | |
1488 | a->prev->next = a->next; | |
1489 | else | |
1490 | admins = a->next; | |
410c8acf | 1491 | DESTROY(a); |
1492 | } | |
1493 | ||
060ca767 | 1494 | /* --- @a_unlock@ --- * |
1495 | * | |
1496 | * Arguments: @admin *a@ = pointer to an admin block | |
1497 | * | |
1498 | * Returns: --- | |
1499 | * | |
1500 | * Use: Unlocks an admin block, allowing its destruction. This is | |
1501 | * also the second half of @a_destroy@. | |
1502 | */ | |
1503 | ||
1504 | static void a_unlock(admin *a) | |
1505 | { | |
1506 | assert(a->ref); | |
1507 | if (!--a->ref && (a->f & AF_DEAD)) | |
1508 | a_dodestroy(a); | |
1509 | } | |
1510 | ||
fd3cf232 | 1511 | /* --- @a_destroy@ --- * |
1512 | * | |
1513 | * Arguments: @admin *a@ = pointer to an admin block | |
1514 | * | |
1515 | * Returns: --- | |
1516 | * | |
1517 | * Use: Destroys an admin block. This requires a certain amount of | |
1518 | * care. | |
1519 | */ | |
1520 | ||
de014da6 | 1521 | static void freequeue(oqueue *q) |
1522 | { | |
1523 | obuf *o, *oo; | |
1524 | ||
1525 | for (o = q->hd; o; o = oo) { | |
1526 | oo = o->next; | |
1527 | xfree(o); | |
1528 | } | |
1529 | q->hd = q->tl = 0; | |
1530 | } | |
1531 | ||
fd3cf232 | 1532 | static void a_destroy(admin *a) |
1533 | { | |
1534 | /* --- Don't multiply destroy admin blocks --- */ | |
1535 | ||
1536 | if (a->f & AF_DEAD) | |
1537 | return; | |
1538 | ||
1539 | /* --- Make sure nobody expects it to work --- */ | |
1540 | ||
1541 | a->f |= AF_DEAD; | |
1542 | T( trace(T_ADMIN, "admin: destroying connection %u", a->seq); ) | |
1543 | ||
1544 | /* --- Free the output buffers --- */ | |
1545 | ||
de014da6 | 1546 | if (a->out.hd) |
fd3cf232 | 1547 | sel_rmfile(&a->w); |
de014da6 | 1548 | freequeue(&a->out); |
fd3cf232 | 1549 | |
1550 | /* --- If the block is locked, that's all we can manage --- */ | |
1551 | ||
060ca767 | 1552 | if (!a->ref) |
1553 | a_dodestroy(a); | |
1554 | T( else | |
1555 | trace(T_ADMIN, "admin: deferring destruction..."); ) | |
fd3cf232 | 1556 | } |
1557 | ||
410c8acf | 1558 | /* --- @a_line@ --- * |
1559 | * | |
1560 | * Arguments: @char *p@ = pointer to the line read | |
3008eabf | 1561 | * @size_t len@ = length of the line |
410c8acf | 1562 | * @void *vp@ = pointer to my admin block |
1563 | * | |
1564 | * Returns: --- | |
1565 | * | |
1566 | * Use: Handles a line of input. | |
1567 | */ | |
1568 | ||
3008eabf | 1569 | static void a_line(char *p, size_t len, void *vp) |
410c8acf | 1570 | { |
1571 | admin *a = vp; | |
1572 | const acmd *c; | |
3cdc3f3a | 1573 | char *av[16]; |
410c8acf | 1574 | size_t ac; |
1575 | ||
8d0c7a83 | 1576 | TIMER; |
fd3cf232 | 1577 | if (a->f & AF_DEAD) |
1578 | return; | |
410c8acf | 1579 | if (!p) { |
de014da6 | 1580 | if (!a->bg) |
1581 | a_destroy(a); | |
1582 | else { | |
1583 | a->f |= AF_CLOSE; | |
1584 | selbuf_disable(&a->b); | |
1585 | } | |
410c8acf | 1586 | return; |
1587 | } | |
3cdc3f3a | 1588 | ac = str_qsplit(p, av, 16, 0, STRF_QUOTE); |
410c8acf | 1589 | if (!ac) |
1590 | return; | |
410c8acf | 1591 | for (c = acmdtab; c->name; c++) { |
3cdc3f3a | 1592 | if (mystrieq(av[0], c->name)) { |
410c8acf | 1593 | ac--; |
f43df819 MW |
1594 | if (c->argmin > ac || ac > c->argmax) { |
1595 | if (!c->help) | |
1596 | a_fail(a, "bad-syntax", "%s", c->name, "", A_END); | |
1597 | else | |
1598 | a_fail(a, "bad-syntax", "%s", c->name, "%s", c->help, A_END); | |
1599 | } else { | |
fd3cf232 | 1600 | a_lock(a); |
410c8acf | 1601 | c->func(a, ac, av + 1); |
fd3cf232 | 1602 | a_unlock(a); |
1603 | } | |
410c8acf | 1604 | return; |
1605 | } | |
1606 | } | |
f43df819 | 1607 | a_fail(a, "unknown-command", "%s", av[0], A_END); |
410c8acf | 1608 | } |
1609 | ||
1610 | /* --- @a_create@ --- * | |
1611 | * | |
1612 | * Arguments: @int fd_in, fd_out@ = file descriptors to use | |
3cdc3f3a | 1613 | * @unsigned f@ = initial flags to set |
410c8acf | 1614 | * |
1615 | * Returns: --- | |
1616 | * | |
1617 | * Use: Creates a new admin connection. | |
1618 | */ | |
1619 | ||
3cdc3f3a | 1620 | void a_create(int fd_in, int fd_out, unsigned f) |
410c8acf | 1621 | { |
1622 | admin *a = CREATE(admin); | |
3cdc3f3a | 1623 | |
93bee2c4 | 1624 | T( static unsigned seq = 0; |
1625 | a->seq = seq++; ) | |
410c8acf | 1626 | T( trace(T_ADMIN, "admin: accepted connection %u", a->seq); ) |
de014da6 | 1627 | a->bg = 0; |
042d5c20 | 1628 | a->ref = 0; |
3cdc3f3a | 1629 | a->f = f; |
de014da6 | 1630 | if (fd_in == STDIN_FILENO) a_stdin = a; |
fd3cf232 | 1631 | fdflags(fd_in, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
410c8acf | 1632 | if (fd_out != fd_in) |
fd3cf232 | 1633 | fdflags(fd_out, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
410c8acf | 1634 | selbuf_init(&a->b, &sel, fd_in, a_line, a); |
fd3cf232 | 1635 | sel_initfile(&sel, &a->w, fd_out, SEL_WRITE, a_flush, a); |
de014da6 | 1636 | a->out.hd = a->out.tl = 0; |
410c8acf | 1637 | a->next = admins; |
1638 | a->prev = 0; | |
de014da6 | 1639 | if (admins) admins->prev = a; |
410c8acf | 1640 | admins = a; |
1641 | } | |
1642 | ||
1643 | /* --- @a_accept@ --- * | |
1644 | * | |
1645 | * Arguments: @int fd@ = file descriptor to accept | |
1646 | * @unsigned mode@ = what to do | |
1647 | * @void *v@ = uninteresting pointer | |
1648 | * | |
1649 | * Returns: --- | |
1650 | * | |
1651 | * Use: Accepts a new admin connection. | |
1652 | */ | |
1653 | ||
1654 | static void a_accept(int fd, unsigned mode, void *v) | |
1655 | { | |
1656 | int nfd; | |
1657 | struct sockaddr_un sun; | |
1658 | size_t sz = sizeof(sun); | |
1659 | ||
1660 | if ((nfd = accept(fd, (struct sockaddr *)&sun, &sz)) < 0) { | |
1ecee057 | 1661 | if (errno != EINTR && errno != EAGAIN && errno != EWOULDBLOCK && |
1662 | errno != ECONNABORTED && errno != EPROTO) | |
f43df819 | 1663 | a_warn("ADMIN", "accept-error", "?ERRNO", A_END); |
410c8acf | 1664 | return; |
1665 | } | |
3cdc3f3a | 1666 | a_create(nfd, nfd, 0); |
410c8acf | 1667 | } |
1668 | ||
1669 | /* --- @a_daemon@ --- * | |
1670 | * | |
1671 | * Arguments: --- | |
1672 | * | |
1673 | * Returns: --- | |
1674 | * | |
1675 | * Use: Informs the admin module that it's a daemon. | |
1676 | */ | |
1677 | ||
1678 | void a_daemon(void) | |
1679 | { | |
1680 | flags |= F_DAEMON; | |
1681 | } | |
1682 | ||
1683 | /* --- @a_init@ --- * | |
1684 | * | |
1685 | * Arguments: @const char *name@ = socket name to create | |
1686 | * | |
1687 | * Returns: --- | |
1688 | * | |
1689 | * Use: Creates the admin listening socket. | |
1690 | */ | |
1691 | ||
1692 | void a_init(const char *name) | |
1693 | { | |
1694 | int fd; | |
1695 | int n = 5; | |
1696 | struct sockaddr_un sun; | |
1697 | struct sigaction sa; | |
1698 | size_t sz; | |
1699 | ||
1700 | /* --- Set up the socket address --- */ | |
1701 | ||
1702 | sz = strlen(name) + 1; | |
1703 | if (sz > sizeof(sun.sun_path)) | |
1704 | die(EXIT_FAILURE, "socket name `%s' too long", name); | |
1705 | BURN(sun); | |
1706 | sun.sun_family = AF_UNIX; | |
1707 | memcpy(sun.sun_path, name, sz); | |
1708 | sz += offsetof(struct sockaddr_un, sun_path); | |
1709 | ||
1710 | /* --- Attempt to bind to the socket --- */ | |
1711 | ||
1712 | umask(0077); | |
1713 | again: | |
1714 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) | |
1715 | die(EXIT_FAILURE, "couldn't create socket: %s", strerror(errno)); | |
1716 | if (bind(fd, (struct sockaddr *)&sun, sz) < 0) { | |
1717 | struct stat st; | |
1718 | int e = errno; | |
1719 | if (errno != EADDRINUSE) { | |
1720 | die(EXIT_FAILURE, "couldn't bind to address `%s': %s", | |
1721 | sun.sun_path, strerror(e)); | |
1722 | } | |
1723 | if (!n) | |
1724 | die(EXIT_FAILURE, "too many retries; giving up"); | |
1725 | n--; | |
1726 | if (!connect(fd, (struct sockaddr *)&sun, sz)) { | |
1727 | die(EXIT_FAILURE, "server already listening on admin socket `%s'", | |
1728 | sun.sun_path); | |
1729 | } | |
1730 | if (errno != ECONNREFUSED) | |
1731 | die(EXIT_FAILURE, "couldn't bind to address: %s", strerror(e)); | |
1732 | if (stat(sun.sun_path, &st)) { | |
1733 | die(EXIT_FAILURE, "couldn't stat `%s': %s", | |
1734 | sun.sun_path, strerror(errno)); | |
1735 | } | |
1736 | if (!S_ISSOCK(st.st_mode)) | |
1737 | die(EXIT_FAILURE, "object `%s' isn't a socket", sun.sun_path); | |
c7053da9 | 1738 | T( trace(T_ADMIN, "admin: stale socket found; removing it"); ) |
410c8acf | 1739 | unlink(sun.sun_path); |
1740 | close(fd); | |
1741 | goto again; | |
1742 | } | |
1743 | chmod(sun.sun_path, 0600); | |
1744 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); | |
1745 | if (listen(fd, 5)) | |
1746 | die(EXIT_FAILURE, "couldn't listen on socket: %s", strerror(errno)); | |
1747 | ||
1748 | /* --- Listen to the socket --- */ | |
1749 | ||
1750 | sel_initfile(&sel, &sock, fd, SEL_READ, a_accept, 0); | |
1751 | sel_addfile(&sock); | |
1752 | sockname = name; | |
1753 | bres_init(&sel); | |
1754 | T( trace_custom(a_trace, 0); | |
1755 | trace(T_ADMIN, "admin: enabled custom tracing"); ) | |
1756 | flags |= F_INIT; | |
1757 | ||
1758 | /* --- Set up signal handlers --- */ | |
1759 | ||
1760 | sig_add(&s_term, SIGTERM, a_sigdie, 0); | |
1761 | sig_add(&s_hup, SIGHUP, a_sighup, 0); | |
3cdc3f3a | 1762 | signal(SIGPIPE, SIG_IGN); |
410c8acf | 1763 | sigaction(SIGINT, 0, &sa); |
1764 | if (sa.sa_handler != SIG_IGN) | |
1765 | sig_add(&s_int, SIGINT, a_sigdie, 0); | |
1766 | } | |
1767 | ||
1768 | /*----- That's all, folks -------------------------------------------------*/ |