410c8acf |
1 | /* -*-c-*- |
2 | * |
3cdc3f3a |
3 | * $Id$ |
410c8acf |
4 | * |
5 | * Communication with the peer |
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 | /*----- Static variables --------------------------------------------------*/ |
34 | |
35 | static peer *peers = 0; |
36 | static sel_file sock; |
37 | |
42da2a58 |
38 | /*----- Tunnel table ------------------------------------------------------*/ |
39 | |
40 | const tunnel_ops *tunnels[] = { |
41 | #ifdef TUN_LINUX |
42 | &tun_linux, |
43 | #endif |
44 | #ifdef TUN_BSD |
45 | &tun_bsd, |
46 | #endif |
47 | #ifdef TUN_UNET |
48 | &tun_unet, |
49 | #endif |
50 | &tun_slip, |
51 | 0 |
52 | }, *tun_default; |
53 | |
410c8acf |
54 | /*----- Main code ---------------------------------------------------------*/ |
55 | |
060ca767 |
56 | static void checktimers(void) |
57 | { |
58 | sel_timer *t, **tt; |
59 | |
60 | tt = &sel.timers; |
61 | while (*tt) { |
62 | assert((*tt)->prev == tt); |
63 | tt = &(*tt)->next; |
64 | } |
65 | } |
66 | |
0ba8de86 |
67 | /* --- @p_pingtype@ --- * |
68 | * |
69 | * Arguments: @unsigned msg@ = message type |
70 | * |
71 | * Returns: String to describe the message. |
72 | */ |
73 | |
74 | static const char *p_pingtype(unsigned msg) |
75 | { |
76 | switch (msg & MSG_TYPEMASK) { |
77 | case MISC_PING: |
78 | case MISC_PONG: |
79 | return "transport-ping"; |
80 | case MISC_EPING: |
81 | case MISC_EPONG: |
82 | return "encrypted-ping"; |
83 | default: |
84 | abort(); |
85 | } |
86 | } |
87 | |
88 | /* --- @p_ponged@ --- * |
89 | * |
90 | * Arguments: @peer *p@ = peer packet arrived from |
91 | * @unsigned msg@ = message type |
92 | * @buf *b@ = buffer containing payload |
93 | * |
94 | * Returns: --- |
95 | * |
96 | * Use: Processes a ping response. |
97 | */ |
98 | |
99 | static void p_ponged(peer *p, unsigned msg, buf *b) |
100 | { |
101 | uint32 id; |
102 | const octet *magic; |
103 | ping *pg; |
104 | |
105 | IF_TRACING(T_PEER, { |
106 | trace(T_PEER, "peer: received %s reply from %s", |
107 | p_pingtype(msg), p->spec.name); |
108 | trace_block(T_PACKET, "peer: ping contents", BBASE(b), BSZ(b)); |
109 | }) |
110 | |
111 | if (buf_getu32(b, &id) || |
112 | (magic = buf_get(b, sizeof(pg->magic))) == 0 || |
113 | BLEFT(b)) { |
114 | a_warn("PEER %s malformed-%s", p->spec.name, p_pingtype(msg)); |
115 | return; |
116 | } |
117 | |
118 | for (pg = p->pings; pg; pg = pg->next) { |
119 | if (pg->id == id) |
120 | goto found; |
121 | } |
122 | a_warn("PEER %s unexpected-%s 0x%08lx", |
123 | p->spec.name, p_pingtype(msg), (unsigned long)id); |
124 | return; |
125 | |
126 | found: |
127 | if (memcmp(magic, pg->magic, sizeof(pg->magic)) != 0) { |
128 | a_warn("PEER %s corrupt-%s", p->spec.name, p_pingtype(msg)); |
129 | return; |
130 | } |
131 | p_pingdone(pg, PING_OK); |
132 | } |
133 | |
410c8acf |
134 | /* --- @p_read@ --- * |
135 | * |
136 | * Arguments: @int fd@ = file descriptor to read from |
137 | * @unsigned mode@ = what happened |
138 | * @void *v@ = an uninteresting pointer |
139 | * |
140 | * Returns: --- |
141 | * |
142 | * Use: Reads a packet from somewhere. |
143 | */ |
144 | |
145 | static void p_read(int fd, unsigned mode, void *v) |
146 | { |
147 | peer *p; |
148 | addr a; |
149 | size_t sz; |
150 | ssize_t n; |
151 | int ch; |
152 | buf b, bb; |
153 | |
154 | /* --- Read the data --- */ |
155 | |
8d0c7a83 |
156 | TIMER; |
410c8acf |
157 | sz = sizeof(addr); |
158 | n = recvfrom(fd, buf_i, sizeof(buf_i), 0, &a.sa, &sz); |
159 | if (n < 0) { |
3cdc3f3a |
160 | a_warn("PEER - socket-read-error -- %s", strerror(errno)); |
410c8acf |
161 | return; |
162 | } |
163 | |
164 | /* --- Find the appropriate peer --- */ |
165 | |
166 | assert(a.sa.sa_family == AF_INET); |
410c8acf |
167 | for (p = peers; p; p = p->next) { |
0ba8de86 |
168 | if (p->spec.sa.sin.sin_addr.s_addr == a.sin.sin_addr.s_addr && |
169 | p->spec.sa.sin.sin_port == a.sin.sin_port) |
410c8acf |
170 | goto found; |
171 | } |
3cdc3f3a |
172 | a_warn("PEER - unexpected-source INET %s %u", |
173 | inet_ntoa(a.sin.sin_addr), (unsigned)ntohs(a.sin.sin_port)); |
410c8acf |
174 | return; |
175 | |
176 | found: |
b9066fbb |
177 | IF_TRACING(T_PEER, { |
0ba8de86 |
178 | trace(T_PEER, "peer: packet received from `%s'", p->spec.name); |
b9066fbb |
179 | trace_block(T_PACKET, "peer: packet contents", buf_i, n); |
180 | }) |
410c8acf |
181 | |
182 | /* --- Pick the packet apart --- */ |
183 | |
5bb41301 |
184 | p->st.t_last = time(0); |
185 | p->st.n_in++; |
186 | p->st.sz_in += n; |
410c8acf |
187 | buf_init(&b, buf_i, n); |
188 | if ((ch = buf_getbyte(&b)) < 0) { |
0ba8de86 |
189 | a_warn("PEER %s bad-packet no-type", p->spec.name); |
410c8acf |
190 | return; |
191 | } |
5bb41301 |
192 | switch (ch & MSG_CATMASK) { |
410c8acf |
193 | case MSG_PACKET: |
5bb41301 |
194 | if (ch & MSG_TYPEMASK) { |
0ba8de86 |
195 | a_warn("PEER %s bad-packet unknown-type 0x%02x", p->spec.name, ch); |
5bb41301 |
196 | p->st.n_reject++; |
197 | return; |
198 | } |
410c8acf |
199 | buf_init(&bb, buf_o, sizeof(buf_o)); |
7ed14135 |
200 | if (ksl_decrypt(&p->ks, MSG_PACKET, &b, &bb)) { |
5bb41301 |
201 | p->st.n_reject++; |
0ba8de86 |
202 | a_warn("PEER %s decrypt-failed", p->spec.name); |
410c8acf |
203 | return; |
204 | } |
5bb41301 |
205 | if (BOK(&bb)) { |
206 | p->st.n_ipin++; |
207 | p->st.sz_ipin += BSZ(&b); |
42da2a58 |
208 | p->t->ops->inject(p->t, &bb); |
5bb41301 |
209 | } else { |
210 | p->st.n_reject++; |
0ba8de86 |
211 | a_warn("PEER %s packet-build-failed", p->spec.name); |
5bb41301 |
212 | } |
410c8acf |
213 | break; |
5bb41301 |
214 | case MSG_KEYEXCH: |
215 | kx_message(&p->kx, ch & MSG_TYPEMASK, &b); |
410c8acf |
216 | break; |
0ba8de86 |
217 | case MSG_MISC: |
218 | switch (ch & MSG_TYPEMASK) { |
219 | case MISC_NOP: |
220 | T( trace(T_PEER, "peer: received NOP packet"); ) |
221 | break; |
222 | case MISC_PING: |
223 | buf_put(p_txstart(p, MSG_MISC | MISC_PONG), BCUR(&b), BLEFT(&b)); |
224 | p_txend(p); |
225 | break; |
226 | case MISC_PONG: |
227 | p_ponged(p, MISC_PONG, &b); |
228 | break; |
229 | case MISC_EPING: |
230 | buf_init(&bb, buf_t, sizeof(buf_t)); |
231 | if (ksl_decrypt(&p->ks, ch, &b, &bb)) { |
232 | p->st.n_reject++; |
233 | a_warn("PEER %s decrypt-failed", p->spec.name); |
234 | return; |
235 | } |
236 | if (BOK(&bb)) { |
237 | buf_flip(&bb); |
238 | if (ksl_encrypt(&p->ks, MSG_MISC | MISC_EPONG, &bb, |
239 | p_txstart(p, MSG_MISC | MISC_EPONG))) |
de014da6 |
240 | kx_start(&p->kx, 0); |
0ba8de86 |
241 | p_txend(p); |
242 | } |
243 | break; |
244 | case MISC_EPONG: |
245 | buf_init(&bb, buf_t, sizeof(buf_t)); |
246 | if (ksl_decrypt(&p->ks, ch, &b, &bb)) { |
247 | p->st.n_reject++; |
248 | a_warn("PEER %s decrypt-failed", p->spec.name); |
249 | return; |
250 | } |
251 | if (BOK(&bb)) { |
252 | buf_flip(&bb); |
253 | p_ponged(p, MISC_EPONG, &bb); |
254 | } |
255 | break; |
256 | } |
257 | break; |
410c8acf |
258 | default: |
5bb41301 |
259 | p->st.n_reject++; |
0ba8de86 |
260 | a_warn("PEER %s bad-packet unknown-category 0x%02x", p->spec.name, ch); |
410c8acf |
261 | break; |
262 | } |
263 | } |
264 | |
265 | /* --- @p_txstart@ --- * |
266 | * |
267 | * Arguments: @peer *p@ = pointer to peer block |
268 | * @unsigned msg@ = message type code |
269 | * |
270 | * Returns: A pointer to a buffer to write to. |
271 | * |
272 | * Use: Starts sending to a peer. Only one send can happen at a |
273 | * time. |
274 | */ |
275 | |
276 | buf *p_txstart(peer *p, unsigned msg) |
277 | { |
278 | buf_init(&p->b, buf_o, sizeof(buf_o)); |
279 | buf_putbyte(&p->b, msg); |
280 | return (&p->b); |
281 | } |
282 | |
283 | /* --- @p_txend@ --- * |
284 | * |
285 | * Arguments: @peer *p@ = pointer to peer block |
286 | * |
287 | * Returns: --- |
288 | * |
289 | * Use: Sends a packet to the peer. |
290 | */ |
291 | |
0ba8de86 |
292 | static void p_setkatimer(peer *); |
293 | |
294 | static int p_dotxend(peer *p) |
410c8acf |
295 | { |
296 | if (!BOK(&p->b)) { |
0ba8de86 |
297 | a_warn("PEER %s packet-build-failed", p->spec.name); |
298 | return (0); |
410c8acf |
299 | } |
300 | IF_TRACING(T_PEER, trace_block(T_PACKET, "peer: sending packet", |
301 | BBASE(&p->b), BLEN(&p->b)); ) |
302 | if (sendto(sock.fd, BBASE(&p->b), BLEN(&p->b), |
0ba8de86 |
303 | 0, &p->spec.sa.sa, p->spec.sasz) < 0) { |
304 | a_warn("PEER %s socket-write-error -- %s", |
305 | p->spec.name, strerror(errno)); |
306 | return (0); |
307 | } else { |
5bb41301 |
308 | p->st.n_out++; |
309 | p->st.sz_out += BLEN(&p->b); |
0ba8de86 |
310 | return (1); |
5bb41301 |
311 | } |
410c8acf |
312 | } |
313 | |
0ba8de86 |
314 | void p_txend(peer *p) |
315 | { |
316 | if (p_dotxend(p) && p->spec.t_ka) { |
317 | sel_rmtimer(&p->tka); |
318 | p_setkatimer(p); |
319 | } |
320 | } |
321 | |
322 | /* --- @p_pingwrite@ --- * |
323 | * |
324 | * Arguments: @ping *p@ = ping structure |
325 | * @buf *b@ = buffer to write in |
326 | * |
327 | * Returns: --- |
328 | * |
329 | * Use: Fills in a ping structure and writes the packet payload. |
330 | */ |
331 | |
332 | static void p_pingwrite(ping *p, buf *b) |
333 | { |
334 | static uint32 seq = 0; |
335 | |
336 | p->id = U32(seq++); |
337 | GR_FILL(&rand_global, p->magic, sizeof(p->magic)); |
338 | buf_putu32(b, p->id); |
339 | buf_put(b, p->magic, sizeof(p->magic)); |
340 | } |
341 | |
342 | /* --- @p_pingdone@ --- * |
343 | * |
344 | * Arguments: @ping *p@ = ping structure |
345 | * @int rc@ = return code to pass on |
346 | * |
347 | * Returns: --- |
348 | * |
349 | * Use: Disposes of a ping structure, maybe sending a notification. |
350 | */ |
351 | |
352 | void p_pingdone(ping *p, int rc) |
353 | { |
0ba8de86 |
354 | if (p->prev) p->prev->next = p->next; |
355 | else p->p->pings = p->next; |
356 | if (p->next) p->next->prev = p->prev; |
357 | if (rc != PING_TIMEOUT) sel_rmtimer(&p->t); |
060ca767 |
358 | T( trace(T_PEER, "peer: ping 0x%08lx done (rc = %d)", |
359 | (unsigned long)p->id, rc); ) |
360 | checktimers(); |
0ba8de86 |
361 | if (rc >= 0) p->func(rc, p->arg); |
362 | } |
363 | |
364 | /* --- @p_pingtimeout@ --- * |
365 | * |
366 | * Arguments: @struct timeval *now@ = the time now |
367 | * @void *pv@ = pointer to ping block |
368 | * |
369 | * Returns: --- |
370 | * |
371 | * Use: Called when a ping times out. |
372 | */ |
373 | |
374 | static void p_pingtimeout(struct timeval *now, void *pv) |
375 | { |
376 | ping *p = pv; |
377 | |
378 | T( trace(T_PEER, "peer: ping 0x%08lx timed out", (unsigned long)p->id); ) |
379 | p_pingdone(p, PING_TIMEOUT); |
380 | } |
381 | |
382 | /* --- @p_pingsend@ --- * |
383 | * |
384 | * Arguments: @peer *p@ = destination peer |
385 | * @ping *pg@ = structure to fill in |
386 | * @unsigned type@ = message type |
387 | * @unsigned long timeout@ = how long to wait before giving up |
388 | * @void (*func)(int, void *)@ = callback function |
389 | * @void *arg@ = argument for callback |
390 | * |
391 | * Returns: Zero if successful, nonzero if it failed. |
392 | * |
393 | * Use: Sends a ping to a peer. Call @func@ with a nonzero argument |
394 | * if we get an answer within the timeout, or zero if no answer. |
395 | */ |
396 | |
397 | int p_pingsend(peer *p, ping *pg, unsigned type, |
398 | unsigned long timeout, |
399 | void (*func)(int, void *), void *arg) |
400 | { |
401 | buf *b, bb; |
402 | struct timeval tv; |
403 | |
0ba8de86 |
404 | switch (type) { |
405 | case MISC_PING: |
406 | pg->msg = MISC_PONG; |
407 | b = p_txstart(p, MSG_MISC | MISC_PING); |
408 | p_pingwrite(pg, b); |
409 | p_txend(p); |
410 | break; |
411 | case MISC_EPING: |
412 | pg->msg = MISC_EPONG; |
413 | b = p_txstart(p, MSG_MISC | MISC_EPING); |
414 | buf_init(&bb, buf_t, sizeof(buf_t)); |
415 | p_pingwrite(pg, &bb); |
416 | buf_flip(&bb); |
417 | if (ksl_encrypt(&p->ks, MSG_MISC | MISC_EPING, &bb, b)) |
de014da6 |
418 | kx_start(&p->kx, 0); |
0ba8de86 |
419 | if (!BOK(b)) |
420 | return (-1); |
421 | p_txend(p); |
422 | break; |
423 | default: |
424 | abort(); |
425 | break; |
426 | } |
427 | |
428 | pg->next = p->pings; |
429 | pg->prev = 0; |
430 | pg->p = p; |
431 | pg->func = func; |
432 | pg->arg = arg; |
060ca767 |
433 | if (p->pings) p->pings->prev = pg; |
0ba8de86 |
434 | p->pings = pg; |
435 | gettimeofday(&tv, 0); |
436 | tv.tv_sec += timeout; |
437 | sel_addtimer(&sel, &pg->t, &tv, p_pingtimeout, pg); |
060ca767 |
438 | checktimers(); |
0ba8de86 |
439 | T( trace(T_PEER, "peer: send %s 0x%08lx to %s", |
440 | p_pingtype(type), (unsigned long)pg->id, p->spec.name); ) |
441 | return (0); |
442 | } |
443 | |
410c8acf |
444 | /* --- @p_tun@ --- * |
445 | * |
446 | * Arguments: @peer *p@ = pointer to peer block |
447 | * @buf *b@ = buffer containing incoming packet |
448 | * |
449 | * Returns: --- |
450 | * |
451 | * Use: Handles a packet which needs to be sent to a peer. |
452 | */ |
453 | |
454 | void p_tun(peer *p, buf *b) |
455 | { |
456 | buf *bb = p_txstart(p, MSG_PACKET); |
7b052fe6 |
457 | |
8d0c7a83 |
458 | TIMER; |
7ed14135 |
459 | if (ksl_encrypt(&p->ks, MSG_PACKET, b, bb)) |
de014da6 |
460 | kx_start(&p->kx, 0); |
5bb41301 |
461 | if (BOK(bb) && BLEN(bb)) { |
462 | p->st.n_ipout++; |
463 | p->st.sz_ipout += BLEN(bb); |
410c8acf |
464 | p_txend(p); |
5bb41301 |
465 | } |
410c8acf |
466 | } |
467 | |
de014da6 |
468 | /* --- @p_keyreload@ --- * |
469 | * |
470 | * Arguments: --- |
471 | * |
472 | * Returns: --- |
473 | * |
474 | * Use: Forces a check of the daemon's keyring files. |
475 | */ |
476 | |
477 | void p_keyreload(void) |
478 | { |
479 | peer *p; |
480 | |
481 | if (km_reload()) { |
482 | for (p = peers; p; p = p->next) |
483 | kx_newkeys(&p->kx); |
484 | } |
485 | } |
486 | |
410c8acf |
487 | /* --- @p_interval@ --- * |
488 | * |
489 | * Arguments: --- |
490 | * |
491 | * Returns: --- |
492 | * |
493 | * Use: Called periodically to do tidying. |
494 | */ |
495 | |
496 | void p_interval(void) |
497 | { |
de014da6 |
498 | peer *p; |
410c8acf |
499 | |
de014da6 |
500 | p_keyreload(); |
501 | for (p = peers; p; p = p->next) |
5bb41301 |
502 | ksl_prune(&p->ks); |
410c8acf |
503 | } |
504 | |
5bb41301 |
505 | /* --- @p_stats@ --- * |
506 | * |
507 | * Arguments: @peer *p@ = pointer to a peer block |
508 | * |
509 | * Returns: A pointer to the peer's statistics. |
510 | */ |
511 | |
512 | stats *p_stats(peer *p) { return (&p->st); } |
513 | |
410c8acf |
514 | /* --- @p_ifname@ --- * |
515 | * |
516 | * Arguments: @peer *p@ = pointer to a peer block |
517 | * |
518 | * Returns: A pointer to the peer's interface name. |
519 | */ |
520 | |
42da2a58 |
521 | const char *p_ifname(peer *p) { return (p->t->ops->ifname(p->t)); } |
410c8acf |
522 | |
523 | /* --- @p_addr@ --- * |
524 | * |
525 | * Arguments: @peer *p@ = pointer to a peer block |
526 | * |
527 | * Returns: A pointer to the peer's address. |
528 | */ |
529 | |
0ba8de86 |
530 | const addr *p_addr(peer *p) { return (&p->spec.sa); } |
410c8acf |
531 | |
532 | /* --- @p_init@ --- * |
533 | * |
767b36e2 |
534 | * Arguments: @struct in_addr addr@ = address to bind to |
535 | * @unsigned port@ = port number to listen to |
410c8acf |
536 | * |
537 | * Returns: --- |
538 | * |
539 | * Use: Initializes the peer system; creates the socket. |
540 | */ |
541 | |
767b36e2 |
542 | void p_init(struct in_addr addr, unsigned port) |
410c8acf |
543 | { |
544 | int fd; |
545 | struct sockaddr_in sin; |
df9dfccf |
546 | int len = PKBUFSZ; |
0a9920e2 |
547 | |
548 | /* --- Note on socket buffer sizes --- * |
549 | * |
550 | * For some bizarre reason, Linux 2.2 (at least) doubles the socket buffer |
551 | * sizes I pass to @setsockopt@. I'm not putting special-case code here |
552 | * for Linux: BSD (at least TCPv2) does what I tell it rather than second- |
553 | * guessing me. |
554 | */ |
410c8acf |
555 | |
556 | if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) |
557 | die(EXIT_FAILURE, "socket creation failed: %s", strerror(errno)); |
558 | BURN(sin); |
559 | sin.sin_family = AF_INET; |
767b36e2 |
560 | sin.sin_addr = addr; |
410c8acf |
561 | sin.sin_port = htons(port); |
562 | if (bind(fd, (struct sockaddr *)&sin, sizeof(sin))) |
563 | die(EXIT_FAILURE, "bind failed: %s", strerror(errno)); |
0a9920e2 |
564 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)) || |
565 | setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &len, sizeof(len))) { |
566 | die(EXIT_FAILURE, "failed to set socket buffer sizes: %s", |
567 | strerror(errno)); |
568 | } |
650a6624 |
569 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
410c8acf |
570 | sel_initfile(&sel, &sock, fd, SEL_READ, p_read, 0); |
571 | sel_addfile(&sock); |
572 | T( trace(T_PEER, "peer: created socket"); ) |
573 | } |
574 | |
575 | /* --- @p_port@ --- * |
576 | * |
577 | * Arguments: --- |
578 | * |
579 | * Returns: Port number used for socket. |
580 | */ |
581 | |
582 | unsigned p_port(void) |
583 | { |
584 | addr a; |
585 | size_t sz = sizeof(addr); |
586 | |
587 | if (getsockname(sock.fd, &a.sa, &sz)) |
588 | die(EXIT_FAILURE, "couldn't read port number: %s", strerror(errno)); |
589 | assert(a.sa.sa_family == AF_INET); |
590 | return (ntohs(a.sin.sin_port)); |
591 | } |
592 | |
0ba8de86 |
593 | /* --- @p_keepalive@ --- * |
594 | * |
595 | * Arguments: @struct timeval *now@ = the current time |
596 | * @void *pv@ = peer to wake up |
597 | * |
598 | * Returns: --- |
599 | * |
600 | * Use: Sends a keepalive ping message to its peer. |
601 | */ |
602 | |
603 | static void p_keepalive(struct timeval *now, void *pv) |
604 | { |
605 | peer *p = pv; |
606 | p_txstart(p, MSG_MISC | MISC_NOP); p_dotxend(p); |
607 | T( trace(T_PEER, "peer: sent keepalive to %s", p->spec.name); ) |
608 | p_setkatimer(p); |
609 | } |
610 | |
611 | /* --- @p_setkatimer@ --- * |
612 | * |
613 | * Arguments: @peer *p@ = peer to set |
614 | * |
615 | * Returns: --- |
616 | * |
617 | * Use: Resets the keepalive timer thing. |
618 | */ |
619 | |
620 | static void p_setkatimer(peer *p) |
621 | { |
622 | struct timeval tv; |
623 | |
624 | if (!p->spec.t_ka) |
625 | return; |
626 | gettimeofday(&tv, 0); |
627 | tv.tv_sec += p->spec.t_ka; |
628 | sel_addtimer(&sel, &p->tka, &tv, p_keepalive, p); |
629 | } |
630 | |
410c8acf |
631 | /* --- @p_create@ --- * |
632 | * |
0ba8de86 |
633 | * Arguments: @peerspec *spec@ = information about this peer |
410c8acf |
634 | * |
635 | * Returns: Pointer to the peer block, or null if it failed. |
636 | * |
637 | * Use: Creates a new named peer block. No peer is actually attached |
638 | * by this point. |
639 | */ |
640 | |
0ba8de86 |
641 | peer *p_create(peerspec *spec) |
410c8acf |
642 | { |
643 | peer *p = CREATE(peer); |
42da2a58 |
644 | |
0ba8de86 |
645 | T( trace(T_PEER, "peer: creating new peer `%s'", spec->name); ) |
646 | p->spec = *spec; |
647 | p->spec.name = xstrdup(spec->name); |
410c8acf |
648 | p->ks = 0; |
649 | p->prev = 0; |
629842d8 |
650 | p->pings = 0; |
5bb41301 |
651 | memset(&p->st, 0, sizeof(stats)); |
652 | p->st.t_start = time(0); |
0ba8de86 |
653 | if ((p->t = spec->tops->create(p)) == 0) |
410c8acf |
654 | goto tidy_0; |
0ba8de86 |
655 | p_setkatimer(p); |
656 | if (kx_init(&p->kx, p, &p->ks)) |
410c8acf |
657 | goto tidy_1; |
658 | p->next = peers; |
659 | if (peers) |
660 | peers->prev = p; |
661 | peers = p; |
0ba8de86 |
662 | switch (p->spec.sa.sa.sa_family) { |
3cdc3f3a |
663 | case AF_INET: |
42da2a58 |
664 | a_notify("ADD %s %s INET %s %u", |
0ba8de86 |
665 | spec->name, |
42da2a58 |
666 | p->t->ops->ifname(p->t), |
0ba8de86 |
667 | inet_ntoa(p->spec.sa.sin.sin_addr), |
668 | (unsigned)ntohs(p->spec.sa.sin.sin_port)); |
3cdc3f3a |
669 | break; |
670 | default: |
0ba8de86 |
671 | a_notify("ADD %s %s UNKNOWN", spec->name, p->t->ops->ifname(p->t)); |
3cdc3f3a |
672 | break; |
673 | } |
0ba8de86 |
674 | a_notify("KXSTART %s", spec->name); /* Couldn't tell anyone before */ |
410c8acf |
675 | return (p); |
676 | |
677 | tidy_1: |
0ba8de86 |
678 | if (spec->t_ka) |
679 | sel_rmtimer(&p->tka); |
680 | p->t->ops->destroy(p->t); |
410c8acf |
681 | tidy_0: |
0ba8de86 |
682 | xfree(p->spec.name); |
410c8acf |
683 | DESTROY(p); |
684 | return (0); |
685 | } |
686 | |
687 | /* --- @p_name@ --- * |
688 | * |
689 | * Arguments: @peer *p@ = pointer to a peer block |
690 | * |
691 | * Returns: A pointer to the peer's name. |
692 | */ |
693 | |
0ba8de86 |
694 | const char *p_name(peer *p) { return (p->spec.name); } |
410c8acf |
695 | |
060ca767 |
696 | /* --- @p_spec@ --- * |
697 | * |
698 | * Arguments: @peer *p@ = pointer to a peer block |
699 | * |
700 | * Returns: Pointer to the peer's specification |
701 | */ |
702 | |
703 | const peerspec *p_spec(peer *p) { return (&p->spec); } |
704 | |
410c8acf |
705 | /* --- @p_find@ --- * |
706 | * |
707 | * Arguments: @const char *name@ = name to look up |
708 | * |
709 | * Returns: Pointer to the peer block, or null if not found. |
710 | * |
711 | * Use: Finds a peer by name. |
712 | */ |
713 | |
714 | peer *p_find(const char *name) |
715 | { |
716 | peer *p; |
717 | for (p = peers; p; p = p->next) { |
0ba8de86 |
718 | if (strcmp(name, p->spec.name) == 0) |
410c8acf |
719 | return (p); |
720 | } |
721 | return (0); |
722 | } |
723 | |
724 | /* --- @p_destroy@ --- * |
725 | * |
726 | * Arguments: @peer *p@ = pointer to a peer |
727 | * |
728 | * Returns: --- |
729 | * |
730 | * Use: Destroys a peer. |
731 | */ |
732 | |
733 | void p_destroy(peer *p) |
734 | { |
0ba8de86 |
735 | ping *pg, *ppg; |
736 | |
737 | T( trace(T_PEER, "peer: destroying peer `%s'", p->spec.name); ) |
738 | a_notify("KILL %s", p->spec.name); |
5bb41301 |
739 | ksl_free(&p->ks); |
410c8acf |
740 | kx_free(&p->kx); |
42da2a58 |
741 | p->t->ops->destroy(p->t); |
0ba8de86 |
742 | if (p->spec.t_ka) |
743 | sel_rmtimer(&p->tka); |
744 | xfree(p->spec.name); |
745 | for (pg = p->pings; pg; pg = ppg) { |
746 | ppg = pg->next; |
747 | p_pingdone(pg, PING_PEERDIED); |
748 | } |
410c8acf |
749 | if (p->next) |
750 | p->next->prev = p->prev; |
751 | if (p->prev) |
752 | p->prev->next = p->next; |
753 | else |
754 | peers = p->next; |
755 | DESTROY(p); |
756 | } |
757 | |
758 | /* --- @p_first@, @p_next@ --- * |
759 | * |
760 | * Arguments: @peer *p@ = a peer block |
761 | * |
762 | * Returns: @peer_first@ returns the first peer in some ordering; |
763 | * @peer_next@ returns the peer following a given one in the |
764 | * same ordering. Null is returned for the end of the list. |
765 | */ |
766 | |
767 | peer *p_first(void) { return (peers); } |
768 | peer *p_next(peer *p) { return (p->next); } |
769 | |
770 | /*----- That's all, folks -------------------------------------------------*/ |