Commit | Line | Data |
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410c8acf | 1 | /* -*-c-*- |
2 | * | |
410c8acf | 3 | * Communication with the peer |
4 | * | |
5 | * (c) 2001 Straylight/Edgeware | |
6 | */ | |
7 | ||
e04c2d50 | 8 | /*----- Licensing notice --------------------------------------------------* |
410c8acf | 9 | * |
10 | * This file is part of Trivial IP Encryption (TrIPE). | |
11 | * | |
11ad66c2 MW |
12 | * TrIPE is free software: you can redistribute it and/or modify it under |
13 | * the terms of the GNU General Public License as published by the Free | |
14 | * Software Foundation; either version 3 of the License, or (at your | |
15 | * option) any later version. | |
e04c2d50 | 16 | * |
11ad66c2 MW |
17 | * TrIPE is distributed in the hope that it will be useful, but WITHOUT |
18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
20 | * for more details. | |
e04c2d50 | 21 | * |
410c8acf | 22 | * You should have received a copy of the GNU General Public License |
11ad66c2 | 23 | * along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
410c8acf | 24 | */ |
25 | ||
410c8acf | 26 | /*----- Header files ------------------------------------------------------*/ |
27 | ||
28 | #include "tripe.h" | |
29 | ||
5d06f63e MW |
30 | /*----- Global state ------------------------------------------------------*/ |
31 | ||
063c9648 | 32 | udpsocket udpsock[NADDRFAM]; |
5d06f63e | 33 | |
410c8acf | 34 | /*----- Static variables --------------------------------------------------*/ |
35 | ||
c8e02c8a MW |
36 | static sym_table byname; |
37 | static addrmap byaddr; | |
6411163d | 38 | static unsigned nmobile; |
24898e7e MW |
39 | static struct tunnel_node { |
40 | struct tunnel_node *next; | |
41 | const tunnel_ops *tops; | |
42 | } *tunnels, **tunnels_tail = &tunnels; | |
43 | const tunnel_ops *dflttun; | |
42da2a58 | 44 | |
410c8acf | 45 | /*----- Main code ---------------------------------------------------------*/ |
46 | ||
0ba8de86 | 47 | /* --- @p_pingtype@ --- * |
48 | * | |
49 | * Arguments: @unsigned msg@ = message type | |
50 | * | |
51 | * Returns: String to describe the message. | |
52 | */ | |
53 | ||
54 | static const char *p_pingtype(unsigned msg) | |
55 | { | |
56 | switch (msg & MSG_TYPEMASK) { | |
57 | case MISC_PING: | |
58 | case MISC_PONG: | |
59 | return "transport-ping"; | |
60 | case MISC_EPING: | |
61 | case MISC_EPONG: | |
62 | return "encrypted-ping"; | |
63 | default: | |
64 | abort(); | |
65 | } | |
66 | } | |
67 | ||
68 | /* --- @p_ponged@ --- * | |
69 | * | |
70 | * Arguments: @peer *p@ = peer packet arrived from | |
71 | * @unsigned msg@ = message type | |
72 | * @buf *b@ = buffer containing payload | |
73 | * | |
74 | * Returns: --- | |
75 | * | |
76 | * Use: Processes a ping response. | |
77 | */ | |
78 | ||
79 | static void p_ponged(peer *p, unsigned msg, buf *b) | |
80 | { | |
81 | uint32 id; | |
82 | const octet *magic; | |
83 | ping *pg; | |
e04c2d50 | 84 | |
0ba8de86 | 85 | IF_TRACING(T_PEER, { |
86 | trace(T_PEER, "peer: received %s reply from %s", | |
87 | p_pingtype(msg), p->spec.name); | |
88 | trace_block(T_PACKET, "peer: ping contents", BBASE(b), BSZ(b)); | |
89 | }) | |
90 | ||
91 | if (buf_getu32(b, &id) || | |
92 | (magic = buf_get(b, sizeof(pg->magic))) == 0 || | |
93 | BLEFT(b)) { | |
f43df819 | 94 | a_warn("PEER", "?PEER", p, "malformed-%s", p_pingtype(msg), A_END); |
0ba8de86 | 95 | return; |
96 | } | |
97 | ||
98 | for (pg = p->pings; pg; pg = pg->next) { | |
99 | if (pg->id == id) | |
100 | goto found; | |
101 | } | |
f43df819 MW |
102 | a_warn("PEER", |
103 | "?PEER", p, | |
104 | "unexpected-%s", p_pingtype(msg), | |
105 | "0x%08lx", (unsigned long)id, | |
106 | A_END); | |
0ba8de86 | 107 | return; |
108 | ||
109 | found: | |
110 | if (memcmp(magic, pg->magic, sizeof(pg->magic)) != 0) { | |
f43df819 | 111 | a_warn("PEER", "?PEER", p, "corrupt-%s", p_pingtype(msg), A_END); |
0ba8de86 | 112 | return; |
113 | } | |
114 | p_pingdone(pg, PING_OK); | |
115 | } | |
116 | ||
6411163d MW |
117 | /* --- @p_rxupdstats@ --- * |
118 | * | |
119 | * Arguments: @peer *p@ = peer to update | |
120 | * @size_t n@ = size of incoming packet | |
121 | * | |
122 | * Returns: --- | |
123 | * | |
124 | * Use: Updates the peer's incoming packet statistics. | |
125 | */ | |
126 | ||
127 | static void p_rxupdstats(peer *p, size_t n) | |
128 | { | |
129 | p->st.t_last = time(0); | |
130 | p->st.n_in++; | |
131 | p->st.sz_in += n; | |
132 | } | |
133 | ||
a50f9a0e MW |
134 | /* --- @p_encrypt@ --- * |
135 | * | |
136 | * Arguments: @peer *p@ = peer to encrypt message to | |
137 | * @int ty@ message type to send | |
138 | * @buf *bin, *bout@ = input and output buffers | |
139 | * | |
140 | * Returns: --- | |
141 | * | |
142 | * Use: Convenience function for packet encryption. Forces | |
143 | * renegotiation when necessary. Check for the output buffer | |
144 | * being broken to find out whether the encryption was | |
145 | * successful. | |
146 | */ | |
147 | ||
148 | static int p_encrypt(peer *p, int ty, buf *bin, buf *bout) | |
149 | { | |
150 | int err = ksl_encrypt(&p->ks, ty, bin, bout); | |
151 | ||
152 | if (err == KSERR_REGEN) { | |
153 | kx_start(&p->kx, 1); | |
154 | err = 0; | |
155 | } | |
156 | if (!BOK(bout)) | |
157 | err = -1; | |
158 | return (err); | |
159 | } | |
160 | ||
23bbe601 MW |
161 | /* --- @p_updateaddr@ --- * |
162 | * | |
163 | * Arguments: @peer *p@ = pointer to peer block | |
164 | * @const addr *a@ = address to associate with this peer | |
165 | * | |
166 | * Returns: Zero if the address was changed; @+1@ if it was already | |
167 | * right. | |
168 | * | |
169 | * Use: Updates our idea of @p@'s address. | |
170 | */ | |
171 | ||
172 | int p_updateaddr(peer *p, const addr *a) | |
173 | { | |
174 | peer *q; | |
175 | peer_byaddr *pa, *qa; | |
5d06f63e | 176 | int ix; |
23bbe601 MW |
177 | unsigned f; |
178 | ||
179 | /* --- Figure out how to proceed --- * | |
180 | * | |
181 | * If this address already belongs to a different peer, then swap the | |
182 | * addresses over. This doesn't leave the displaced peer in an especially | |
183 | * good state, but it ought to get sorted out soon enough. | |
184 | */ | |
185 | ||
186 | pa = am_find(&byaddr, a, sizeof(peer_byaddr), &f); | |
187 | if (f && pa->p == p) | |
188 | return (+1); | |
189 | else if (!f) { | |
190 | T( trace(T_PEER, "peer: updating address for `%s'", p_name(p)); ) | |
191 | am_remove(&byaddr, p->byaddr); | |
192 | p->byaddr = pa; p->spec.sa = *a; pa->p = p; | |
5d06f63e | 193 | p->afix = afix(p->spec.sa.sa.sa_family); assert(p->afix >= 0); |
23bbe601 MW |
194 | a_notify("NEWADDR", "?PEER", p, "?ADDR", a, A_END); |
195 | return (0); | |
196 | } else { | |
197 | q = pa->p; qa = p->byaddr; | |
198 | T( trace(T_PEER, "peer: swapping addresses for `%s' and `%s'", | |
199 | p_name(p), p_name(q)); ) | |
200 | q->byaddr = qa; qa->p = q; q->spec.sa = p->spec.sa; | |
201 | p->byaddr = pa; pa->p = p; p->spec.sa = *a; | |
5d06f63e | 202 | ix = p->afix; p->afix = q->afix; q->afix = ix; |
23bbe601 MW |
203 | a_notify("NEWADDR", "?PEER", p, "?ADDR", a, A_END); |
204 | a_notify("NEWADDR", "?PEER", q, "?ADDR", &q->spec.sa, A_END); | |
205 | return (0); | |
206 | } | |
207 | } | |
208 | ||
a50f9a0e MW |
209 | /* --- @p_decrypt@ --- * |
210 | * | |
6411163d MW |
211 | * Arguments: @peer **pp@ = pointer to peer to decrypt message from |
212 | * @addr *a@ = address the packet arrived on | |
213 | * @size_t n@ = size of original incoming packet | |
a50f9a0e MW |
214 | * @int ty@ = message type to expect |
215 | * @buf *bin, *bout@ = input and output buffers | |
216 | * | |
217 | * Returns: Zero on success; nonzero on error. | |
218 | * | |
219 | * Use: Convenience function for packet decryption. Reports errors | |
220 | * and updates statistics appropriately. | |
6411163d MW |
221 | * |
222 | * If @*pp@ is null on entry and there are mobile peers then we | |
223 | * see if any of them can decrypt the packet. If so, we record | |
224 | * @*a@ as the peer's new address and send a notification. | |
a50f9a0e MW |
225 | */ |
226 | ||
6411163d MW |
227 | static int p_decrypt(peer **pp, addr *a, size_t n, |
228 | int ty, buf *bin, buf *bout) | |
a50f9a0e | 229 | { |
c71be758 | 230 | peer *p, *q; |
6411163d | 231 | int err = KSERR_DECRYPT; |
6411163d | 232 | |
c71be758 MW |
233 | /* --- If we have a match on the source address then try that first --- */ |
234 | ||
235 | q = *pp; | |
236 | if (q) { | |
6411163d | 237 | T( trace(T_PEER, "peer: decrypting packet from known peer `%s'", |
c71be758 MW |
238 | p_name(q)); ) |
239 | if ((err = ksl_decrypt(&q->ks, ty, bin, bout)) != KSERR_DECRYPT || | |
240 | !(q->spec.f & PSF_MOBILE) || nmobile == 1) { | |
241 | p = q; | |
242 | goto match; | |
243 | } | |
73174919 | 244 | T( trace(T_PEER, "peer: failed to decrypt: try other mobile peers..."); ) |
c71be758 | 245 | } else if (nmobile) |
8ed35e02 | 246 | T( trace(T_PEER, "peer: unknown source: trying mobile peers...") ); |
c71be758 | 247 | else { |
6411163d | 248 | p = 0; |
c71be758 MW |
249 | goto searched; |
250 | } | |
251 | ||
252 | /* --- See whether any mobile peer is interested --- */ | |
253 | ||
01c21903 MW |
254 | p = 0; |
255 | FOREACH_PEER(qq, { | |
256 | if (qq == q || !(qq->spec.f & PSF_MOBILE)) continue; | |
257 | if ((err = ksl_decrypt(&qq->ks, ty, bin, bout)) == KSERR_DECRYPT) { | |
c71be758 | 258 | T( trace(T_PEER, "peer: peer `%s' failed to decrypt", |
01c21903 | 259 | p_name(qq)); ) |
c71be758 MW |
260 | continue; |
261 | } else { | |
01c21903 | 262 | p = qq; |
c71be758 MW |
263 | IF_TRACING(T_PEER, { |
264 | if (!err) | |
01c21903 | 265 | trace(T_PEER, "peer: peer `%s' reports success", p_name(qq)); |
c71be758 MW |
266 | else { |
267 | trace(T_PEER, "peer: peer `%s' reports decryption error %d", | |
01c21903 | 268 | p_name(qq), err); |
6411163d | 269 | } |
c71be758 MW |
270 | }) |
271 | break; | |
6411163d | 272 | } |
c71be758 MW |
273 | }); |
274 | ||
275 | /* --- We've searched the mobile peers --- */ | |
276 | ||
277 | searched: | |
278 | if (!p) { | |
01c21903 MW |
279 | if (!q) |
280 | a_warn("PEER", "-", "unexpected-source", "?ADDR", a, A_END); | |
281 | else { | |
282 | a_warn("PEER", "?PEER", p, "decrypt-failed", | |
283 | "error-code", "%d", err, A_END); | |
284 | p_rxupdstats(q, n); | |
285 | } | |
c71be758 MW |
286 | return (-1); |
287 | } | |
288 | ||
23bbe601 | 289 | /* --- We found one that accepted, so update the peer's address --- */ |
c71be758 MW |
290 | |
291 | if (!err) { | |
01c21903 | 292 | *pp = p; |
23bbe601 | 293 | p_updateaddr(p, a); |
6411163d | 294 | } |
c71be758 MW |
295 | |
296 | match: | |
88622d1d | 297 | p_rxupdstats(p, n); |
6411163d MW |
298 | if (err) { |
299 | if (p) p->st.n_reject++; | |
300 | a_warn("PEER", "?PEER", p, "decrypt-failed", | |
301 | "error-code", "%d", err, A_END); | |
a50f9a0e MW |
302 | return (-1); |
303 | } | |
304 | if (!BOK(bout)) | |
305 | return (-1); | |
306 | return (0); | |
307 | } | |
308 | ||
410c8acf | 309 | /* --- @p_read@ --- * |
310 | * | |
311 | * Arguments: @int fd@ = file descriptor to read from | |
312 | * @unsigned mode@ = what happened | |
313 | * @void *v@ = an uninteresting pointer | |
314 | * | |
315 | * Returns: --- | |
316 | * | |
317 | * Use: Reads a packet from somewhere. | |
318 | */ | |
319 | ||
320 | static void p_read(int fd, unsigned mode, void *v) | |
321 | { | |
37941236 | 322 | peer *p = 0; |
410c8acf | 323 | addr a; |
cb160b86 | 324 | socklen_t sz; |
410c8acf | 325 | ssize_t n; |
326 | int ch; | |
327 | buf b, bb; | |
89640f3f MW |
328 | #ifndef NTRACE |
329 | int ix = -1; | |
330 | char name[NI_MAXHOST], svc[NI_MAXSERV]; | |
331 | #endif | |
410c8acf | 332 | |
333 | /* --- Read the data --- */ | |
334 | ||
f4c9c08f | 335 | QUICKRAND; |
410c8acf | 336 | sz = sizeof(addr); |
337 | n = recvfrom(fd, buf_i, sizeof(buf_i), 0, &a.sa, &sz); | |
338 | if (n < 0) { | |
f43df819 | 339 | a_warn("PEER", "-", "socket-read-error", "?ERRNO", A_END); |
410c8acf | 340 | return; |
341 | } | |
89640f3f MW |
342 | IF_TRACING(T_PEER, { |
343 | ix = afix(a.sa.sa_family); | |
344 | getnameinfo(&a.sa, sz, name, sizeof(name), svc, sizeof(svc), | |
345 | NI_NUMERICHOST | NI_NUMERICSERV); | |
346 | }) | |
410c8acf | 347 | |
37941236 | 348 | /* --- If the packet is a greeting, don't check peers --- */ |
349 | ||
350 | if (n && buf_i[0] == (MSG_MISC | MISC_GREET)) { | |
351 | IF_TRACING(T_PEER, { | |
89640f3f MW |
352 | trace(T_PEER, "peer: greeting received from %s %s %s", |
353 | aftab[ix].name, name, svc); | |
37941236 | 354 | trace_block(T_PACKET, "peer: greeting contents", buf_i, n); |
355 | }) | |
356 | buf_init(&b, buf_i, n); | |
357 | buf_getbyte(&b); | |
3deadf73 | 358 | if (c_check(0, 0, &b) || BLEFT(&b)) { |
f43df819 | 359 | a_warn("PEER", "-", "invalid-greeting", A_END); |
37941236 | 360 | return; |
361 | } | |
f43df819 MW |
362 | a_notify("GREET", |
363 | "?B64", buf_i + 1, (size_t)(n - 1), | |
364 | "?ADDR", &a, | |
365 | A_END); | |
37941236 | 366 | return; |
367 | } | |
368 | ||
6411163d MW |
369 | /* --- Find the appropriate peer --- * |
370 | * | |
371 | * At this stage, don't worry too much about whether we actually found it. | |
372 | */ | |
410c8acf | 373 | |
6411163d | 374 | p = p_findbyaddr(&a); |
410c8acf | 375 | |
b9066fbb | 376 | IF_TRACING(T_PEER, { |
6411163d MW |
377 | if (p) { |
378 | trace(T_PEER, | |
89640f3f MW |
379 | "peer: packet received from `%s' from address %s %s %s", |
380 | p_name(p), aftab[ix].name, name, svc); | |
6411163d | 381 | } else { |
89640f3f MW |
382 | trace(T_PEER, "peer: packet received from unknown address %s %s %s", |
383 | aftab[ix].name, name, svc); | |
6411163d | 384 | } |
b9066fbb | 385 | trace_block(T_PACKET, "peer: packet contents", buf_i, n); |
386 | }) | |
410c8acf | 387 | |
388 | /* --- Pick the packet apart --- */ | |
389 | ||
390 | buf_init(&b, buf_i, n); | |
391 | if ((ch = buf_getbyte(&b)) < 0) { | |
f43df819 | 392 | a_warn("PEER", "?PEER", p, "bad-packet", "no-type", A_END); |
410c8acf | 393 | return; |
394 | } | |
5bb41301 | 395 | switch (ch & MSG_CATMASK) { |
410c8acf | 396 | case MSG_PACKET: |
5bb41301 | 397 | if (ch & MSG_TYPEMASK) { |
f43df819 MW |
398 | a_warn("PEER", |
399 | "?PEER", p, | |
400 | "bad-packet", | |
401 | "unknown-type", "0x%02x", ch, | |
402 | A_END); | |
6411163d | 403 | if (p) p->st.n_reject++; |
5bb41301 | 404 | return; |
405 | } | |
410c8acf | 406 | buf_init(&bb, buf_o, sizeof(buf_o)); |
6411163d | 407 | if (p_decrypt(&p, &a, n, MSG_PACKET, &b, &bb)) |
410c8acf | 408 | return; |
5bb41301 | 409 | if (BOK(&bb)) { |
410 | p->st.n_ipin++; | |
411 | p->st.sz_ipin += BSZ(&b); | |
42da2a58 | 412 | p->t->ops->inject(p->t, &bb); |
5bb41301 | 413 | } else { |
414 | p->st.n_reject++; | |
f43df819 | 415 | a_warn("PEER", "?PEER", p, "packet-build-failed", A_END); |
5bb41301 | 416 | } |
410c8acf | 417 | break; |
5bb41301 | 418 | case MSG_KEYEXCH: |
f6994bd0 MW |
419 | if (p) p_rxupdstats(p, n); |
420 | if (kx_message(p ? &p->kx : 0, &a, ch & MSG_TYPEMASK, &b)) goto unexp; | |
410c8acf | 421 | break; |
0ba8de86 | 422 | case MSG_MISC: |
423 | switch (ch & MSG_TYPEMASK) { | |
424 | case MISC_NOP: | |
6411163d | 425 | if (!p) goto unexp; |
88622d1d | 426 | p_rxupdstats(p, n); |
0ba8de86 | 427 | T( trace(T_PEER, "peer: received NOP packet"); ) |
428 | break; | |
429 | case MISC_PING: | |
6411163d | 430 | if (!p) goto unexp; |
88622d1d | 431 | p_rxupdstats(p, n); |
0ba8de86 | 432 | buf_put(p_txstart(p, MSG_MISC | MISC_PONG), BCUR(&b), BLEFT(&b)); |
aa1a0211 | 433 | p_txend(p, 0); |
e04c2d50 | 434 | break; |
0ba8de86 | 435 | case MISC_PONG: |
6411163d | 436 | if (!p) goto unexp; |
88622d1d | 437 | p_rxupdstats(p, n); |
0ba8de86 | 438 | p_ponged(p, MISC_PONG, &b); |
439 | break; | |
440 | case MISC_EPING: | |
441 | buf_init(&bb, buf_t, sizeof(buf_t)); | |
6411163d | 442 | if (p_decrypt(&p, &a, n, ch, &b, &bb)) |
0ba8de86 | 443 | return; |
0ba8de86 | 444 | if (BOK(&bb)) { |
445 | buf_flip(&bb); | |
a50f9a0e MW |
446 | p_encrypt(p, MSG_MISC | MISC_EPONG, &bb, |
447 | p_txstart(p, MSG_MISC | MISC_EPONG)); | |
aa1a0211 | 448 | p_txend(p, 0); |
0ba8de86 | 449 | } |
450 | break; | |
451 | case MISC_EPONG: | |
452 | buf_init(&bb, buf_t, sizeof(buf_t)); | |
6411163d | 453 | if (p_decrypt(&p, &a, n, ch, &b, &bb)) |
0ba8de86 | 454 | return; |
0ba8de86 | 455 | if (BOK(&bb)) { |
456 | buf_flip(&bb); | |
457 | p_ponged(p, MISC_EPONG, &bb); | |
458 | } | |
459 | break; | |
067aa5f0 MW |
460 | case MISC_BYE: |
461 | buf_init(&bb, buf_t, sizeof(buf_t)); | |
462 | if (p_decrypt(&p, &a, n, ch, &b, &bb)) return; | |
463 | if (!(p->spec.f&PSF_EPHEM)) return; | |
464 | if (BOK(&bb)) { | |
465 | buf_flip(&bb); | |
466 | if (BSZ(&bb)) return; | |
467 | p_destroy(p, 0); | |
468 | } | |
469 | break; | |
0ba8de86 | 470 | } |
471 | break; | |
410c8acf | 472 | default: |
6411163d | 473 | if (p) p->st.n_reject++; |
f43df819 MW |
474 | a_warn("PEER", |
475 | "?PEER", p, | |
476 | "bad-packet", | |
a68280fc | 477 | "unknown-category", "0x%02x", ch, |
f43df819 | 478 | A_END); |
410c8acf | 479 | break; |
6411163d MW |
480 | unexp: |
481 | a_warn("PEER", "-", "unexpected-source", "?ADDR", &a, A_END); | |
482 | break; | |
410c8acf | 483 | } |
484 | } | |
485 | ||
486 | /* --- @p_txstart@ --- * | |
487 | * | |
488 | * Arguments: @peer *p@ = pointer to peer block | |
489 | * @unsigned msg@ = message type code | |
490 | * | |
491 | * Returns: A pointer to a buffer to write to. | |
492 | * | |
493 | * Use: Starts sending to a peer. Only one send can happen at a | |
494 | * time. | |
495 | */ | |
496 | ||
497 | buf *p_txstart(peer *p, unsigned msg) | |
498 | { | |
499 | buf_init(&p->b, buf_o, sizeof(buf_o)); | |
500 | buf_putbyte(&p->b, msg); | |
501 | return (&p->b); | |
502 | } | |
503 | ||
8362ac1c MW |
504 | /* --- @p_txaddr@ --- * |
505 | * | |
506 | * Arguments: @const addr *a@ = recipient address | |
507 | * @const void *p@ = pointer to packet to send | |
508 | * @size_t sz@ = length of packet | |
509 | * | |
510 | * Returns: Zero if successful, nonzero on error. | |
511 | * | |
512 | * Use: Sends a packet to an address which (possibly) isn't a current | |
513 | * peer. | |
514 | */ | |
515 | ||
516 | int p_txaddr(const addr *a, const void *p, size_t sz) | |
517 | { | |
518 | socklen_t sasz = addrsz(a); | |
56c76774 | 519 | int i; |
8362ac1c | 520 | |
56c76774 MW |
521 | if ((i = afix(a->sa.sa_family)) < 0) { |
522 | a_warn("PEER", "?ADDR", a, "disabled-address-family", A_END); | |
523 | return (-1); | |
524 | } | |
8362ac1c | 525 | IF_TRACING(T_PEER, trace_block(T_PACKET, "peer: sending packet", p, sz); ) |
063c9648 | 526 | if (sendto(udpsock[i].sf.fd, p, sz, 0, &a->sa, sasz) < 0) { |
8362ac1c MW |
527 | a_warn("PEER", "?ADDR", a, "socket-write-error", "?ERRNO", A_END); |
528 | return (-1); | |
529 | } | |
530 | return (0); | |
531 | } | |
532 | ||
410c8acf | 533 | /* --- @p_txend@ --- * |
534 | * | |
535 | * Arguments: @peer *p@ = pointer to peer block | |
aa1a0211 | 536 | * @unsigned f@ = flags |
410c8acf | 537 | * |
538 | * Returns: --- | |
539 | * | |
540 | * Use: Sends a packet to the peer. | |
541 | */ | |
542 | ||
0ba8de86 | 543 | static void p_setkatimer(peer *); |
544 | ||
545 | static int p_dotxend(peer *p) | |
410c8acf | 546 | { |
cb2c2bfc MW |
547 | socklen_t sasz = addrsz(&p->spec.sa); |
548 | ||
410c8acf | 549 | if (!BOK(&p->b)) { |
f43df819 | 550 | a_warn("PEER", "?PEER", p, "packet-build-failed", A_END); |
0ba8de86 | 551 | return (0); |
410c8acf | 552 | } |
553 | IF_TRACING(T_PEER, trace_block(T_PACKET, "peer: sending packet", | |
554 | BBASE(&p->b), BLEN(&p->b)); ) | |
063c9648 | 555 | if (sendto(udpsock[p->afix].sf.fd, BBASE(&p->b), BLEN(&p->b), |
cb2c2bfc | 556 | 0, &p->spec.sa.sa, sasz) < 0) { |
f43df819 | 557 | a_warn("PEER", "?PEER", p, "socket-write-error", "?ERRNO", A_END); |
0ba8de86 | 558 | return (0); |
559 | } else { | |
5bb41301 | 560 | p->st.n_out++; |
561 | p->st.sz_out += BLEN(&p->b); | |
0ba8de86 | 562 | return (1); |
5bb41301 | 563 | } |
410c8acf | 564 | } |
565 | ||
aa1a0211 | 566 | void p_txend(peer *p, unsigned f) |
0ba8de86 | 567 | { |
568 | if (p_dotxend(p) && p->spec.t_ka) { | |
569 | sel_rmtimer(&p->tka); | |
570 | p_setkatimer(p); | |
571 | } | |
572 | } | |
573 | ||
574 | /* --- @p_pingwrite@ --- * | |
575 | * | |
576 | * Arguments: @ping *p@ = ping structure | |
577 | * @buf *b@ = buffer to write in | |
578 | * | |
579 | * Returns: --- | |
580 | * | |
581 | * Use: Fills in a ping structure and writes the packet payload. | |
582 | */ | |
583 | ||
584 | static void p_pingwrite(ping *p, buf *b) | |
585 | { | |
586 | static uint32 seq = 0; | |
587 | ||
588 | p->id = U32(seq++); | |
589 | GR_FILL(&rand_global, p->magic, sizeof(p->magic)); | |
590 | buf_putu32(b, p->id); | |
591 | buf_put(b, p->magic, sizeof(p->magic)); | |
592 | } | |
593 | ||
594 | /* --- @p_pingdone@ --- * | |
595 | * | |
596 | * Arguments: @ping *p@ = ping structure | |
597 | * @int rc@ = return code to pass on | |
598 | * | |
599 | * Returns: --- | |
600 | * | |
601 | * Use: Disposes of a ping structure, maybe sending a notification. | |
602 | */ | |
603 | ||
604 | void p_pingdone(ping *p, int rc) | |
605 | { | |
0ba8de86 | 606 | if (p->prev) p->prev->next = p->next; |
607 | else p->p->pings = p->next; | |
608 | if (p->next) p->next->prev = p->prev; | |
609 | if (rc != PING_TIMEOUT) sel_rmtimer(&p->t); | |
060ca767 | 610 | T( trace(T_PEER, "peer: ping 0x%08lx done (rc = %d)", |
611 | (unsigned long)p->id, rc); ) | |
0ba8de86 | 612 | if (rc >= 0) p->func(rc, p->arg); |
613 | } | |
614 | ||
615 | /* --- @p_pingtimeout@ --- * | |
616 | * | |
617 | * Arguments: @struct timeval *now@ = the time now | |
618 | * @void *pv@ = pointer to ping block | |
619 | * | |
620 | * Returns: --- | |
621 | * | |
622 | * Use: Called when a ping times out. | |
623 | */ | |
624 | ||
625 | static void p_pingtimeout(struct timeval *now, void *pv) | |
626 | { | |
627 | ping *p = pv; | |
628 | ||
629 | T( trace(T_PEER, "peer: ping 0x%08lx timed out", (unsigned long)p->id); ) | |
630 | p_pingdone(p, PING_TIMEOUT); | |
631 | } | |
632 | ||
633 | /* --- @p_pingsend@ --- * | |
634 | * | |
635 | * Arguments: @peer *p@ = destination peer | |
636 | * @ping *pg@ = structure to fill in | |
637 | * @unsigned type@ = message type | |
638 | * @unsigned long timeout@ = how long to wait before giving up | |
639 | * @void (*func)(int, void *)@ = callback function | |
640 | * @void *arg@ = argument for callback | |
641 | * | |
642 | * Returns: Zero if successful, nonzero if it failed. | |
643 | * | |
644 | * Use: Sends a ping to a peer. Call @func@ with a nonzero argument | |
645 | * if we get an answer within the timeout, or zero if no answer. | |
646 | */ | |
647 | ||
648 | int p_pingsend(peer *p, ping *pg, unsigned type, | |
649 | unsigned long timeout, | |
650 | void (*func)(int, void *), void *arg) | |
651 | { | |
652 | buf *b, bb; | |
653 | struct timeval tv; | |
654 | ||
0ba8de86 | 655 | switch (type) { |
656 | case MISC_PING: | |
657 | pg->msg = MISC_PONG; | |
658 | b = p_txstart(p, MSG_MISC | MISC_PING); | |
659 | p_pingwrite(pg, b); | |
aa1a0211 | 660 | p_txend(p, 0); |
0ba8de86 | 661 | break; |
662 | case MISC_EPING: | |
663 | pg->msg = MISC_EPONG; | |
664 | b = p_txstart(p, MSG_MISC | MISC_EPING); | |
665 | buf_init(&bb, buf_t, sizeof(buf_t)); | |
666 | p_pingwrite(pg, &bb); | |
667 | buf_flip(&bb); | |
a50f9a0e | 668 | p_encrypt(p, MSG_MISC | MISC_EPING, &bb, b); |
0ba8de86 | 669 | if (!BOK(b)) |
670 | return (-1); | |
aa1a0211 | 671 | p_txend(p, 0); |
0ba8de86 | 672 | break; |
673 | default: | |
674 | abort(); | |
675 | break; | |
676 | } | |
677 | ||
678 | pg->next = p->pings; | |
679 | pg->prev = 0; | |
680 | pg->p = p; | |
681 | pg->func = func; | |
682 | pg->arg = arg; | |
060ca767 | 683 | if (p->pings) p->pings->prev = pg; |
0ba8de86 | 684 | p->pings = pg; |
685 | gettimeofday(&tv, 0); | |
686 | tv.tv_sec += timeout; | |
687 | sel_addtimer(&sel, &pg->t, &tv, p_pingtimeout, pg); | |
688 | T( trace(T_PEER, "peer: send %s 0x%08lx to %s", | |
689 | p_pingtype(type), (unsigned long)pg->id, p->spec.name); ) | |
690 | return (0); | |
691 | } | |
692 | ||
37941236 | 693 | /* --- @p_greet@ --- * |
694 | * | |
695 | * Arguments: @peer *p@ = peer to send to | |
696 | * @const void *c@ = pointer to challenge | |
697 | * @size_t sz@ = size of challenge | |
698 | * | |
699 | * Returns: --- | |
700 | * | |
701 | * Use: Sends a greeting packet. | |
702 | */ | |
703 | ||
704 | void p_greet(peer *p, const void *c, size_t sz) | |
705 | { | |
706 | buf *b = p_txstart(p, MSG_MISC | MISC_GREET); | |
707 | buf_put(b, c, sz); | |
aa1a0211 | 708 | p_txend(p, 0); |
37941236 | 709 | } |
710 | ||
410c8acf | 711 | /* --- @p_tun@ --- * |
712 | * | |
713 | * Arguments: @peer *p@ = pointer to peer block | |
714 | * @buf *b@ = buffer containing incoming packet | |
715 | * | |
716 | * Returns: --- | |
717 | * | |
718 | * Use: Handles a packet which needs to be sent to a peer. | |
719 | */ | |
720 | ||
721 | void p_tun(peer *p, buf *b) | |
722 | { | |
723 | buf *bb = p_txstart(p, MSG_PACKET); | |
7b052fe6 | 724 | |
f4c9c08f | 725 | QUICKRAND; |
a50f9a0e | 726 | p_encrypt(p, MSG_PACKET, b, bb); |
5bb41301 | 727 | if (BOK(bb) && BLEN(bb)) { |
728 | p->st.n_ipout++; | |
729 | p->st.sz_ipout += BLEN(bb); | |
aa1a0211 | 730 | p_txend(p, 0); |
5bb41301 | 731 | } |
410c8acf | 732 | } |
733 | ||
de014da6 | 734 | /* --- @p_keyreload@ --- * |
735 | * | |
736 | * Arguments: --- | |
737 | * | |
738 | * Returns: --- | |
739 | * | |
740 | * Use: Forces a check of the daemon's keyring files. | |
741 | */ | |
742 | ||
743 | void p_keyreload(void) | |
744 | { | |
c8e02c8a MW |
745 | if (km_reload()) |
746 | FOREACH_PEER(p, { kx_newkeys(&p->kx); }); | |
de014da6 | 747 | } |
748 | ||
410c8acf | 749 | /* --- @p_interval@ --- * |
750 | * | |
751 | * Arguments: --- | |
752 | * | |
753 | * Returns: --- | |
754 | * | |
755 | * Use: Called periodically to do tidying. | |
756 | */ | |
757 | ||
758 | void p_interval(void) | |
759 | { | |
de014da6 | 760 | p_keyreload(); |
c8e02c8a | 761 | FOREACH_PEER(p, { ksl_prune(&p->ks); }); |
410c8acf | 762 | } |
763 | ||
5bb41301 | 764 | /* --- @p_stats@ --- * |
765 | * | |
766 | * Arguments: @peer *p@ = pointer to a peer block | |
767 | * | |
768 | * Returns: A pointer to the peer's statistics. | |
769 | */ | |
770 | ||
771 | stats *p_stats(peer *p) { return (&p->st); } | |
772 | ||
410c8acf | 773 | /* --- @p_ifname@ --- * |
774 | * | |
775 | * Arguments: @peer *p@ = pointer to a peer block | |
776 | * | |
777 | * Returns: A pointer to the peer's interface name. | |
778 | */ | |
779 | ||
64cf2223 MW |
780 | const char *p_ifname(peer *p) { return (p->ifname); } |
781 | ||
782 | /* --- @p_setifname@ --- * | |
783 | * | |
784 | * Arguments: @peer *p@ = pointer to a peer block | |
785 | * @const char *name@ = pointer to the new name | |
786 | * | |
787 | * Returns: --- | |
788 | * | |
789 | * Use: Changes the name held for a peer's interface. | |
790 | */ | |
791 | ||
792 | void p_setifname(peer *p, const char *name) | |
72917fe7 MW |
793 | { |
794 | xfree(p->ifname); | |
795 | p->ifname = xstrdup(name); | |
796 | if (p->spec.tops->setifname) | |
797 | p->spec.tops->setifname(p->t, name); | |
798 | } | |
410c8acf | 799 | |
800 | /* --- @p_addr@ --- * | |
801 | * | |
802 | * Arguments: @peer *p@ = pointer to a peer block | |
803 | * | |
804 | * Returns: A pointer to the peer's address. | |
805 | */ | |
806 | ||
0ba8de86 | 807 | const addr *p_addr(peer *p) { return (&p->spec.sa); } |
410c8acf | 808 | |
7737eb87 | 809 | /* --- @p_bind@ --- * |
410c8acf | 810 | * |
89640f3f | 811 | * Arguments: @struct addrinfo *ailist@ = addresses to bind to |
410c8acf | 812 | * |
9d966eb7 | 813 | * Returns: Zero on success, @-1@ on failure. |
410c8acf | 814 | * |
9d966eb7 | 815 | * Use: Binds to the main UDP sockets. |
410c8acf | 816 | */ |
817 | ||
9d966eb7 | 818 | int p_bind(struct addrinfo *ailist) |
410c8acf | 819 | { |
9d966eb7 | 820 | int fd = -1; |
df9dfccf | 821 | int len = PKBUFSZ; |
47828bd9 | 822 | int yes = 1; |
89640f3f MW |
823 | int i; |
824 | struct addrinfo *ai; | |
825 | unsigned port, lastport = 0; | |
826 | addr a; | |
827 | socklen_t sz; | |
0a9920e2 | 828 | |
063c9648 | 829 | for (i = 0; i < NADDRFAM; i++) udpsock[i].sf.fd = -1; |
89640f3f MW |
830 | |
831 | for (ai = ailist; ai; ai = ai->ai_next) { | |
832 | if ((i = afix(ai->ai_family)) < 0) continue; | |
063c9648 | 833 | if (udpsock[i].sf.fd != -1) continue; |
89640f3f MW |
834 | |
835 | /* --- Note on socket buffer sizes --- * | |
836 | * | |
837 | * For some bizarre reason, Linux 2.2 (at least) doubles the socket | |
838 | * buffer sizes I pass to @setsockopt@. I'm not putting special-case | |
839 | * code here for Linux: BSD (at least TCPv2) does what I tell it rather | |
840 | * than second-guessing me. | |
841 | */ | |
842 | ||
5ae728a6 MW |
843 | if ((fd = socket(ai->ai_family, SOCK_DGRAM, 0)) < 0) { |
844 | a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name, | |
845 | "create-failed", "?ERRNO", A_END); | |
9d966eb7 | 846 | goto fail; |
5ae728a6 | 847 | } |
47828bd9 MW |
848 | if (i == AFIX_INET6 && |
849 | setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &yes, sizeof(yes))) { | |
5ae728a6 MW |
850 | a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name, |
851 | "set-v6only-failed", "?ERRNO", A_END); | |
9d966eb7 | 852 | goto fail; |
47828bd9 | 853 | } |
89640f3f MW |
854 | assert(ai->ai_addrlen <= sizeof(a)); |
855 | memcpy(&a, ai->ai_addr, ai->ai_addrlen); | |
856 | if ((port = getport(&a)) == 0 && lastport) setport(&a, lastport); | |
5ae728a6 MW |
857 | if (bind(fd, &a.sa, addrsz(&a))) { |
858 | a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name, | |
859 | "bind-failed", "?ERRNO", A_END); | |
9d966eb7 | 860 | goto fail; |
5ae728a6 | 861 | } |
89640f3f MW |
862 | if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)) || |
863 | setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &len, sizeof(len))) { | |
5ae728a6 MW |
864 | a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name, |
865 | "set-buffers-failed", "?ERRNO", A_END); | |
9d966eb7 | 866 | goto fail; |
89640f3f MW |
867 | } |
868 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); | |
8d4c29d2 MW |
869 | if (port) |
870 | udpsock[i].port = port; | |
871 | else { | |
89640f3f MW |
872 | sz = sizeof(a); |
873 | if (getsockname(fd, &a.sa, &sz)) { | |
5ae728a6 MW |
874 | a_warn("PEER", "-", "udp-socket", "%s", aftab[i].name, |
875 | "read-local-address-failed", "?ERRNO", A_END); | |
9d966eb7 | 876 | goto fail; |
89640f3f | 877 | } |
8d4c29d2 | 878 | udpsock[i].port = lastport = getport(&a); |
89640f3f | 879 | } |
c6fb2bee MW |
880 | T( trace(T_PEER, "peer: created %s socket", aftab[i].name); ) |
881 | sel_initfile(&sel, &udpsock[i].sf, fd, SEL_READ, p_read, 0); | |
882 | sel_addfile(&udpsock[i].sf); | |
9d966eb7 | 883 | fd = -1; |
0a9920e2 | 884 | } |
c8e02c8a | 885 | |
9d966eb7 MW |
886 | return (0); |
887 | ||
888 | fail: | |
889 | if (fd != -1) close(fd); | |
890 | p_unbind(); | |
891 | return (-1); | |
7737eb87 MW |
892 | } |
893 | ||
bf302d90 MW |
894 | /* --- @p_unbind@ --- * |
895 | * | |
896 | * Arguments: --- | |
897 | * | |
898 | * Returns: --- | |
899 | * | |
900 | * Use: Unbinds the UDP sockets. There must not be any active peers, | |
901 | * and none can be created until the sockets are rebound. | |
902 | */ | |
903 | ||
904 | void p_unbind(void) | |
905 | { | |
906 | int i; | |
907 | ||
908 | #ifndef NDEBUG | |
909 | { peer_iter it; p_mkiter(&it); assert(!p_next(&it)); } | |
910 | #endif | |
911 | ||
912 | for (i = 0; i < NADDRFAM; i++) { | |
913 | if (udpsock[i].sf.fd == -1) continue; | |
914 | sel_rmfile(&udpsock[i].sf); | |
915 | close(udpsock[i].sf.fd); | |
916 | udpsock[i].sf.fd = -1; | |
917 | } | |
918 | } | |
919 | ||
7737eb87 MW |
920 | /* --- @p_init@ --- * |
921 | * | |
922 | * Arguments: --- | |
923 | * | |
924 | * Returns: --- | |
925 | * | |
926 | * Use: Initializes the peer system. | |
927 | */ | |
928 | ||
929 | void p_init(void) | |
930 | { | |
c8e02c8a MW |
931 | sym_create(&byname); |
932 | am_create(&byaddr); | |
410c8acf | 933 | } |
934 | ||
24898e7e MW |
935 | /* --- @p_addtun@ --- * |
936 | * | |
937 | * Arguments: @const tunnel_ops *tops@ = tunnel ops to add | |
938 | * | |
9d966eb7 | 939 | * Returns: Zero on success, @-1@ on failure. |
24898e7e | 940 | * |
9d966eb7 MW |
941 | * Use: Adds a tunnel class to the list of known classes, if it |
942 | * initializes properly. If there is no current default tunnel, | |
943 | * then this one is made the default. | |
24898e7e MW |
944 | * |
945 | * Does nothing if the tunnel class is already known. So adding | |
946 | * a bunch of tunnels takes quadratic time, but there will be | |
947 | * too few to care about. | |
948 | */ | |
949 | ||
9d966eb7 | 950 | int p_addtun(const tunnel_ops *tops) |
24898e7e MW |
951 | { |
952 | struct tunnel_node *tn; | |
953 | ||
954 | for (tn = tunnels; tn; tn = tn->next) | |
9d966eb7 MW |
955 | if (tn->tops == tops) return (0); |
956 | if (tops->init()) return (-1); | |
24898e7e MW |
957 | tn = CREATE(struct tunnel_node); |
958 | tn->next = 0; tn->tops = tops; | |
959 | *tunnels_tail = tn; tunnels_tail = &tn->next; | |
960 | if (!dflttun) dflttun = tops; | |
9d966eb7 | 961 | return (0); |
24898e7e MW |
962 | } |
963 | ||
964 | /* --- @p_setdflttun@ --- * | |
965 | * | |
966 | * Arguments: @const tunnel_ops *tops@ = tunnel ops to set | |
967 | * | |
968 | * Returns: --- | |
969 | * | |
970 | * Use: Sets the default tunnel. It must already be registered. The | |
971 | * old default is forgotten. | |
972 | */ | |
973 | ||
974 | void p_setdflttun(const tunnel_ops *tops) | |
975 | { dflttun = tops; } | |
976 | ||
977 | /* --- @p_dflttun@ --- * | |
978 | * | |
979 | * Arguments: --- | |
980 | * | |
981 | * Returns: A pointer to the current default tunnel operations, or null | |
982 | * if no tunnels are defined. | |
983 | */ | |
984 | ||
985 | const tunnel_ops *p_dflttun(void) { return (dflttun); } | |
986 | ||
987 | /* --- @p_findtun@ --- * | |
988 | * | |
989 | * Arguments: @const char *name@ = tunnel name | |
990 | * | |
991 | * Returns: Pointer to the tunnel operations, or null. | |
992 | * | |
993 | * Use: Finds the operations for a named tunnel class. | |
994 | */ | |
995 | ||
996 | const tunnel_ops *p_findtun(const char *name) | |
997 | { | |
998 | const struct tunnel_node *tn; | |
999 | ||
1000 | for (tn = tunnels; tn; tn = tn->next) | |
1001 | if (mystrieq(tn->tops->name, name) == 0) return (tn->tops); | |
1002 | return (0); | |
1003 | } | |
1004 | ||
1005 | /* --- @p_mktuniter@ --- * | |
1006 | * | |
1007 | * Arguments: @tuniter *i@ = pointer to iterator to initialize | |
1008 | * | |
1009 | * Returns: --- | |
1010 | * | |
1011 | * Use: Initializes a tunnel iterator. | |
1012 | */ | |
1013 | ||
1014 | void p_mktuniter(tun_iter *i) { i->next = tunnels; } | |
1015 | ||
1016 | /* --- @p_nexttun@ --- * | |
1017 | * | |
1018 | * Arguments: @tuniter *i@ = pointer to iterator | |
1019 | * | |
1020 | * Returns: Pointer to the next tunnel's operations, or null. | |
1021 | */ | |
1022 | ||
1023 | const tunnel_ops *p_nexttun(tun_iter *i) | |
1024 | { | |
1025 | const struct tunnel_node *tn = i->next; | |
1026 | ||
1027 | if (!tn) return (0); | |
1028 | else { i->next = tn->next; return (tn->tops); } | |
1029 | } | |
1030 | ||
0ba8de86 | 1031 | /* --- @p_keepalive@ --- * |
1032 | * | |
1033 | * Arguments: @struct timeval *now@ = the current time | |
1034 | * @void *pv@ = peer to wake up | |
1035 | * | |
1036 | * Returns: --- | |
1037 | * | |
1038 | * Use: Sends a keepalive ping message to its peer. | |
1039 | */ | |
1040 | ||
1041 | static void p_keepalive(struct timeval *now, void *pv) | |
1042 | { | |
1043 | peer *p = pv; | |
fe2a5dcf | 1044 | |
0ba8de86 | 1045 | p_txstart(p, MSG_MISC | MISC_NOP); p_dotxend(p); |
1046 | T( trace(T_PEER, "peer: sent keepalive to %s", p->spec.name); ) | |
1047 | p_setkatimer(p); | |
1048 | } | |
1049 | ||
1050 | /* --- @p_setkatimer@ --- * | |
1051 | * | |
1052 | * Arguments: @peer *p@ = peer to set | |
1053 | * | |
1054 | * Returns: --- | |
1055 | * | |
1056 | * Use: Resets the keepalive timer thing. | |
1057 | */ | |
1058 | ||
1059 | static void p_setkatimer(peer *p) | |
1060 | { | |
1061 | struct timeval tv; | |
1062 | ||
1063 | if (!p->spec.t_ka) | |
1064 | return; | |
1065 | gettimeofday(&tv, 0); | |
1066 | tv.tv_sec += p->spec.t_ka; | |
1067 | sel_addtimer(&sel, &p->tka, &tv, p_keepalive, p); | |
1068 | } | |
1069 | ||
410c8acf | 1070 | /* --- @p_create@ --- * |
1071 | * | |
0ba8de86 | 1072 | * Arguments: @peerspec *spec@ = information about this peer |
410c8acf | 1073 | * |
1074 | * Returns: Pointer to the peer block, or null if it failed. | |
1075 | * | |
1076 | * Use: Creates a new named peer block. No peer is actually attached | |
1077 | * by this point. | |
1078 | */ | |
1079 | ||
0ba8de86 | 1080 | peer *p_create(peerspec *spec) |
410c8acf | 1081 | { |
1082 | peer *p = CREATE(peer); | |
eb5f3fea MW |
1083 | const tunnel_ops *tops = spec->tops; |
1084 | int fd; | |
c8e02c8a MW |
1085 | unsigned f; |
1086 | ||
1087 | p->byname = sym_find(&byname, spec->name, -1, sizeof(peer_byname), &f); | |
1088 | if (f) goto tidy_0; | |
1089 | p->byaddr = am_find(&byaddr, &spec->sa, sizeof(peer_byaddr), &f); | |
1090 | if (f) goto tidy_1; | |
1091 | p->byname->p = p->byaddr->p = p; | |
42da2a58 | 1092 | |
0ba8de86 | 1093 | T( trace(T_PEER, "peer: creating new peer `%s'", spec->name); ) |
1094 | p->spec = *spec; | |
c8e02c8a | 1095 | p->spec.name = (/*unconst*/ char *)SYM_NAME(p->byname); |
fe2a5dcf MW |
1096 | if (spec->tag) p->spec.tag = xstrdup(spec->tag); |
1097 | if (spec->privtag) p->spec.privtag = xstrdup(spec->privtag); | |
8362ac1c | 1098 | if (spec->knock) p->spec.knock = xstrdup(spec->knock); |
410c8acf | 1099 | p->ks = 0; |
629842d8 | 1100 | p->pings = 0; |
64cf2223 | 1101 | p->ifname = 0; |
5d06f63e | 1102 | p->afix = afix(p->spec.sa.sa.sa_family); assert(p->afix >= 0); |
5bb41301 | 1103 | memset(&p->st, 0, sizeof(stats)); |
1104 | p->st.t_start = time(0); | |
388e0319 | 1105 | if (!(tops->flags & TUNF_PRIVOPEN)) |
eb5f3fea | 1106 | fd = -1; |
388e0319 | 1107 | else if ((fd = ps_tunfd(tops, &p->ifname)) < 0) |
c8e02c8a | 1108 | goto tidy_2; |
eb5f3fea MW |
1109 | if ((p->t = tops->create(p, fd, &p->ifname)) == 0) |
1110 | goto tidy_3; | |
1111 | T( trace(T_TUNNEL, "peer: attached interface %s to peer `%s'", | |
1112 | p->ifname, p_name(p)); ) | |
0ba8de86 | 1113 | p_setkatimer(p); |
024d189a | 1114 | iv_addreason(); |
0510f262 | 1115 | if (kx_setup(&p->kx, p, &p->ks, p->spec.f & PSF_KXMASK)) |
eb5f3fea | 1116 | goto tidy_4; |
f43df819 | 1117 | a_notify("ADD", |
6047fbac MW |
1118 | "?PEER", p, |
1119 | "%s", p->ifname, | |
1120 | "?ADDR", &p->spec.sa, | |
1121 | A_END); | |
8743c776 | 1122 | if (!(p->spec.f & KXF_CORK)) { |
010e6f63 | 1123 | a_notify("KXSTART", "?PEER", p, A_END); |
f43df819 | 1124 | /* Couldn't tell anyone before */ |
010e6f63 | 1125 | } |
6411163d | 1126 | if (p->spec.f & PSF_MOBILE) nmobile++; |
410c8acf | 1127 | return (p); |
1128 | ||
eb5f3fea | 1129 | tidy_4: |
fe2a5dcf | 1130 | if (spec->t_ka) sel_rmtimer(&p->tka); |
72917fe7 | 1131 | xfree(p->ifname); |
0ba8de86 | 1132 | p->t->ops->destroy(p->t); |
024d189a | 1133 | iv_rmreason(); |
eb5f3fea MW |
1134 | tidy_3: |
1135 | if (fd >= 0) close(fd); | |
c8e02c8a MW |
1136 | tidy_2: |
1137 | am_remove(&byaddr, p->byaddr); | |
48b84569 | 1138 | if (p->spec.tag) xfree(p->spec.tag); |
fe2a5dcf | 1139 | if (p->spec.privtag) xfree(p->spec.privtag); |
c8e02c8a MW |
1140 | tidy_1: |
1141 | sym_remove(&byname, p->byname); | |
410c8acf | 1142 | tidy_0: |
410c8acf | 1143 | DESTROY(p); |
1144 | return (0); | |
1145 | } | |
1146 | ||
1147 | /* --- @p_name@ --- * | |
1148 | * | |
1149 | * Arguments: @peer *p@ = pointer to a peer block | |
1150 | * | |
1151 | * Returns: A pointer to the peer's name. | |
1152 | */ | |
1153 | ||
6411163d MW |
1154 | const char *p_name(peer *p) |
1155 | { if (p) return (p->spec.name); else return ("-"); } | |
410c8acf | 1156 | |
48b84569 MW |
1157 | /* --- @p_tag@ --- * |
1158 | * | |
1159 | * Arguments: @peer *p@ = pointer to a peer block | |
1160 | * | |
1161 | * Returns: A pointer to the peer's public key tag. | |
1162 | */ | |
1163 | ||
1164 | const char *p_tag(peer *p) | |
1165 | { return (p->spec.tag ? p->spec.tag : p->spec.name); } | |
1166 | ||
fe2a5dcf MW |
1167 | /* --- @p_privtag@ --- * |
1168 | * | |
1169 | * Arguments: @peer *p@ = pointer to a peer block | |
1170 | * | |
1171 | * Returns: A pointer to the peer's private key tag. | |
1172 | */ | |
1173 | ||
1174 | const char *p_privtag(peer *p) | |
1175 | { return (p->spec.privtag ? p->spec.privtag : tag_priv); } | |
1176 | ||
060ca767 | 1177 | /* --- @p_spec@ --- * |
1178 | * | |
1179 | * Arguments: @peer *p@ = pointer to a peer block | |
1180 | * | |
1181 | * Returns: Pointer to the peer's specification | |
1182 | */ | |
1183 | ||
1184 | const peerspec *p_spec(peer *p) { return (&p->spec); } | |
1185 | ||
c8e02c8a MW |
1186 | /* --- @p_findbyaddr@ --- * |
1187 | * | |
1188 | * Arguments: @const addr *a@ = address to look up | |
1189 | * | |
1190 | * Returns: Pointer to the peer block, or null if not found. | |
1191 | * | |
1192 | * Use: Finds a peer by address. | |
1193 | */ | |
1194 | ||
1195 | peer *p_findbyaddr(const addr *a) | |
1196 | { | |
1197 | peer_byaddr *pa; | |
1198 | ||
6411163d MW |
1199 | if ((pa = am_find(&byaddr, a, 0, 0)) != 0) { |
1200 | assert(pa->p); | |
c8e02c8a | 1201 | return (pa->p); |
6411163d | 1202 | } |
c8e02c8a MW |
1203 | return (0); |
1204 | } | |
1205 | ||
410c8acf | 1206 | /* --- @p_find@ --- * |
1207 | * | |
1208 | * Arguments: @const char *name@ = name to look up | |
1209 | * | |
1210 | * Returns: Pointer to the peer block, or null if not found. | |
1211 | * | |
1212 | * Use: Finds a peer by name. | |
1213 | */ | |
1214 | ||
1215 | peer *p_find(const char *name) | |
1216 | { | |
c8e02c8a MW |
1217 | peer_byname *pn; |
1218 | ||
1219 | if ((pn = sym_find(&byname, name, -1, 0, 0)) != 0) | |
1220 | return (pn->p); | |
e04c2d50 | 1221 | return (0); |
410c8acf | 1222 | } |
1223 | ||
1224 | /* --- @p_destroy@ --- * | |
1225 | * | |
1226 | * Arguments: @peer *p@ = pointer to a peer | |
067aa5f0 | 1227 | * @int bye@ = say goodbye to the peer? |
410c8acf | 1228 | * |
1229 | * Returns: --- | |
1230 | * | |
1231 | * Use: Destroys a peer. | |
1232 | */ | |
1233 | ||
067aa5f0 | 1234 | void p_destroy(peer *p, int bye) |
410c8acf | 1235 | { |
0ba8de86 | 1236 | ping *pg, *ppg; |
067aa5f0 | 1237 | buf *b, bb; |
0ba8de86 | 1238 | |
1239 | T( trace(T_PEER, "peer: destroying peer `%s'", p->spec.name); ) | |
067aa5f0 | 1240 | |
136f3f44 | 1241 | if (bye) { |
067aa5f0 MW |
1242 | b = p_txstart(p, MSG_MISC | MISC_BYE); |
1243 | buf_init(&bb, buf_t, sizeof(buf_t)); | |
1244 | assert(BOK(&bb)); buf_flip(&bb); | |
1245 | p_encrypt(p, MSG_MISC | MISC_BYE, &bb, b); | |
aa1a0211 | 1246 | p_txend(p, 0); |
067aa5f0 MW |
1247 | } |
1248 | ||
f43df819 | 1249 | a_notify("KILL", "%s", p->spec.name, A_END); |
5bb41301 | 1250 | ksl_free(&p->ks); |
410c8acf | 1251 | kx_free(&p->kx); |
fe2a5dcf MW |
1252 | if (p->spec.f & PSF_MOBILE) nmobile--; |
1253 | if (p->ifname) xfree(p->ifname); | |
1254 | if (p->spec.tag) xfree(p->spec.tag); | |
1255 | if (p->spec.privtag) xfree(p->spec.privtag); | |
8362ac1c | 1256 | if (p->spec.knock) xfree(p->spec.knock); |
42da2a58 | 1257 | p->t->ops->destroy(p->t); |
fe2a5dcf | 1258 | if (p->spec.t_ka) sel_rmtimer(&p->tka); |
0ba8de86 | 1259 | for (pg = p->pings; pg; pg = ppg) { |
1260 | ppg = pg->next; | |
1261 | p_pingdone(pg, PING_PEERDIED); | |
1262 | } | |
c8e02c8a MW |
1263 | sym_remove(&byname, p->byname); |
1264 | am_remove(&byaddr, p->byaddr); | |
024d189a | 1265 | iv_rmreason(); |
410c8acf | 1266 | DESTROY(p); |
1267 | } | |
1268 | ||
78e45b53 MW |
1269 | /* --- @p_destroyall@ --- * |
1270 | * | |
1271 | * Arguments: --- | |
1272 | * | |
1273 | * Returns: --- | |
1274 | * | |
1275 | * Use: Destroys all of the peers, saying goodbye. | |
1276 | */ | |
1277 | ||
1278 | void p_destroyall(void) { FOREACH_PEER(p, { p_destroy(p, 1); }); } | |
1279 | ||
c8e02c8a MW |
1280 | /* --- @p_mkiter@ --- * |
1281 | * | |
1282 | * Arguments: @peer_iter *i@ = pointer to an iterator | |
1283 | * | |
1284 | * Returns: --- | |
1285 | * | |
1286 | * Use: Initializes the iterator. | |
1287 | */ | |
1288 | ||
1289 | void p_mkiter(peer_iter *i) { sym_mkiter(&i->i, &byname); } | |
1290 | ||
1291 | /* --- @p_next@ --- * | |
1292 | * | |
1293 | * Arguments: @peer_iter *i@ = pointer to an iterator | |
410c8acf | 1294 | * |
c8e02c8a | 1295 | * Returns: Next peer, or null if at the end. |
410c8acf | 1296 | * |
c8e02c8a | 1297 | * Use: Returns the next peer. |
410c8acf | 1298 | */ |
1299 | ||
c8e02c8a MW |
1300 | peer *p_next(peer_iter *i) |
1301 | { | |
1302 | peer_byname *pn; | |
1303 | ||
1304 | if ((pn = sym_next(&i->i)) == 0) | |
1305 | return (0); | |
1306 | return (pn->p); | |
1307 | } | |
410c8acf | 1308 | |
1309 | /*----- That's all, folks -------------------------------------------------*/ |