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