| 1 | /* |
1 | /* |
| 2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
|
|
3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
| 3 | |
4 | |
|
|
5 | This file is part of GVPE. |
|
|
6 | |
| 4 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
8 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
10 | (at your option) any later version. |
| 8 | |
11 | |
| 9 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
| 13 | |
16 | |
| 14 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
| 16 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
20 | */ |
| 18 | |
21 | |
| 19 | #include "config.h" |
22 | #include "config.h" |
| 20 | |
23 | |
| 21 | extern "C" { |
24 | #include <cassert> |
| 22 | # include "lzf/lzf.h" |
|
|
| 23 | } |
|
|
| 24 | |
25 | |
| 25 | #include <list> |
26 | #include <list> |
| 26 | |
27 | |
| 27 | #include <openssl/rand.h> |
28 | #include <openssl/rand.h> |
| 28 | #include <openssl/evp.h> |
29 | #include <openssl/evp.h> |
| … | |
… | |
| 35 | #include "slog.h" |
36 | #include "slog.h" |
| 36 | #include "device.h" |
37 | #include "device.h" |
| 37 | #include "vpn.h" |
38 | #include "vpn.h" |
| 38 | #include "connection.h" |
39 | #include "connection.h" |
| 39 | |
40 | |
|
|
41 | #include "netcompat.h" |
|
|
42 | |
| 40 | #if !HAVE_RAND_PSEUDO_BYTES |
43 | #if !HAVE_RAND_PSEUDO_BYTES |
| 41 | # define RAND_pseudo_bytes RAND_bytes |
44 | # define RAND_pseudo_bytes RAND_bytes |
| 42 | #endif |
45 | #endif |
| 43 | |
46 | |
| 44 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
47 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
|
|
48 | |
|
|
49 | #define ULTRA_FAST 1 |
|
|
50 | #define HLOG 15 |
|
|
51 | #include "lzf/lzf.h" |
|
|
52 | #include "lzf/lzf_c.c" |
|
|
53 | #include "lzf/lzf_d.c" |
| 45 | |
54 | |
| 46 | struct crypto_ctx |
55 | struct crypto_ctx |
| 47 | { |
56 | { |
| 48 | EVP_CIPHER_CTX cctx; |
57 | EVP_CIPHER_CTX cctx; |
| 49 | HMAC_CTX hctx; |
58 | HMAC_CTX hctx; |
| … | |
… | |
| 53 | }; |
62 | }; |
| 54 | |
63 | |
| 55 | crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc) |
64 | crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc) |
| 56 | { |
65 | { |
| 57 | EVP_CIPHER_CTX_init (&cctx); |
66 | EVP_CIPHER_CTX_init (&cctx); |
| 58 | EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc); |
67 | require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc)); |
| 59 | HMAC_CTX_init (&hctx); |
68 | HMAC_CTX_init (&hctx); |
| 60 | HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0); |
69 | HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0); |
| 61 | } |
70 | } |
| 62 | |
71 | |
| 63 | crypto_ctx::~crypto_ctx () |
72 | crypto_ctx::~crypto_ctx () |
| 64 | { |
73 | { |
| 65 | EVP_CIPHER_CTX_cleanup (&cctx); |
74 | require (EVP_CIPHER_CTX_cleanup (&cctx)); |
| 66 | HMAC_CTX_cleanup (&hctx); |
75 | HMAC_CTX_cleanup (&hctx); |
| 67 | } |
76 | } |
| 68 | |
77 | |
| 69 | static void |
78 | static void |
| 70 | rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h) |
79 | rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h) |
| 71 | { |
80 | { |
| 72 | EVP_MD_CTX ctx; |
81 | EVP_MD_CTX ctx; |
| 73 | |
82 | |
| 74 | EVP_MD_CTX_init (&ctx); |
83 | EVP_MD_CTX_init (&ctx); |
| 75 | EVP_DigestInit (&ctx, RSA_HASH); |
84 | require (EVP_DigestInit (&ctx, RSA_HASH)); |
| 76 | EVP_DigestUpdate(&ctx, &chg, sizeof chg); |
85 | require (EVP_DigestUpdate(&ctx, &chg, sizeof chg)); |
| 77 | EVP_DigestUpdate(&ctx, &id, sizeof id); |
86 | require (EVP_DigestUpdate(&ctx, &id, sizeof id)); |
| 78 | EVP_DigestFinal (&ctx, (unsigned char *)&h, 0); |
87 | require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); |
| 79 | EVP_MD_CTX_cleanup (&ctx); |
88 | EVP_MD_CTX_cleanup (&ctx); |
| 80 | } |
89 | } |
| 81 | |
90 | |
| 82 | struct rsa_entry { |
91 | struct rsa_entry { |
| 83 | tstamp expire; |
92 | tstamp expire; |
| … | |
… | |
| 131 | |
140 | |
| 132 | } rsa_cache; |
141 | } rsa_cache; |
| 133 | |
142 | |
| 134 | void rsa_cache::cleaner_cb (time_watcher &w) |
143 | void rsa_cache::cleaner_cb (time_watcher &w) |
| 135 | { |
144 | { |
| 136 | if (empty ()) |
145 | if (!empty ()) |
| 137 | w.at = TSTAMP_CANCEL; |
|
|
| 138 | else |
|
|
| 139 | { |
146 | { |
| 140 | w.at = NOW + RSA_TTL; |
147 | w.start (NOW + RSA_TTL); |
| 141 | |
148 | |
| 142 | for (iterator i = begin (); i != end (); ) |
149 | for (iterator i = begin (); i != end (); ) |
| 143 | if (i->expire <= NOW) |
150 | if (i->expire <= NOW) |
| 144 | i = erase (i); |
151 | i = erase (i); |
| 145 | else |
152 | else |
| … | |
… | |
| 197 | // only do action once every x seconds per host whole allowing bursts. |
204 | // only do action once every x seconds per host whole allowing bursts. |
| 198 | // this implementation ("splay list" ;) is inefficient, |
205 | // this implementation ("splay list" ;) is inefficient, |
| 199 | // but low on resources. |
206 | // but low on resources. |
| 200 | struct net_rate_limiter : list<net_rateinfo> |
207 | struct net_rate_limiter : list<net_rateinfo> |
| 201 | { |
208 | { |
| 202 | static const double ALPHA = 1. - 1. / 180.; // allow bursts |
209 | # define NRL_ALPHA (1. - 1. / 600.) // allow bursts |
| 203 | static const double CUTOFF = 10.; // one event every CUTOFF seconds |
210 | # define NRL_CUTOFF 10. // one event every CUTOFF seconds |
| 204 | static const double EXPIRE = CUTOFF * 30.; // expire entries after this time |
211 | # define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time |
| 205 | static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value |
212 | # define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value |
| 206 | |
213 | |
| 207 | bool can (const sockinfo &si) { return can((u32)si.host); } |
214 | bool can (const sockinfo &si) { return can((u32)si.host); } |
| 208 | bool can (u32 host); |
215 | bool can (u32 host); |
| 209 | }; |
216 | }; |
| 210 | |
217 | |
| 211 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
218 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
| 212 | |
219 | |
| … | |
… | |
| 215 | iterator i; |
222 | iterator i; |
| 216 | |
223 | |
| 217 | for (i = begin (); i != end (); ) |
224 | for (i = begin (); i != end (); ) |
| 218 | if (i->host == host) |
225 | if (i->host == host) |
| 219 | break; |
226 | break; |
| 220 | else if (i->last < NOW - EXPIRE) |
227 | else if (i->last < NOW - NRL_EXPIRE) |
| 221 | i = erase (i); |
228 | i = erase (i); |
| 222 | else |
229 | else |
| 223 | i++; |
230 | i++; |
| 224 | |
231 | |
| 225 | if (i == end ()) |
232 | if (i == end ()) |
| 226 | { |
233 | { |
| 227 | net_rateinfo ri; |
234 | net_rateinfo ri; |
| 228 | |
235 | |
| 229 | ri.host = host; |
236 | ri.host = host; |
| 230 | ri.pcnt = 1.; |
237 | ri.pcnt = 1.; |
| 231 | ri.diff = MAXDIF; |
238 | ri.diff = NRL_MAXDIF; |
| 232 | ri.last = NOW; |
239 | ri.last = NOW; |
| 233 | |
240 | |
| 234 | push_front (ri); |
241 | push_front (ri); |
| 235 | |
242 | |
| 236 | return true; |
243 | return true; |
| … | |
… | |
| 238 | else |
245 | else |
| 239 | { |
246 | { |
| 240 | net_rateinfo ri (*i); |
247 | net_rateinfo ri (*i); |
| 241 | erase (i); |
248 | erase (i); |
| 242 | |
249 | |
| 243 | ri.pcnt = ri.pcnt * ALPHA; |
250 | ri.pcnt = ri.pcnt * NRL_ALPHA; |
| 244 | ri.diff = ri.diff * ALPHA + (NOW - ri.last); |
251 | ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last); |
| 245 | |
252 | |
| 246 | ri.last = NOW; |
253 | ri.last = NOW; |
| 247 | |
254 | |
| 248 | double dif = ri.diff / ri.pcnt; |
255 | double dif = ri.diff / ri.pcnt; |
| 249 | |
256 | |
| 250 | bool send = dif > CUTOFF; |
257 | bool send = dif > NRL_CUTOFF; |
| 251 | |
258 | |
| 252 | if (dif > MAXDIF) |
259 | if (dif > NRL_MAXDIF) |
| 253 | { |
260 | { |
| 254 | ri.pcnt = 1.; |
261 | ri.pcnt = 1.; |
| 255 | ri.diff = MAXDIF; |
262 | ri.diff = NRL_MAXDIF; |
| 256 | } |
263 | } |
| 257 | else if (send) |
264 | else if (send) |
| 258 | ri.pcnt++; |
265 | ri.pcnt++; |
| 259 | |
266 | |
| 260 | push_front (ri); |
267 | push_front (ri); |
| … | |
… | |
| 307 | } |
314 | } |
| 308 | |
315 | |
| 309 | #define MAXVPNDATA (MAX_MTU - 6 - 6) |
316 | #define MAXVPNDATA (MAX_MTU - 6 - 6) |
| 310 | #define DATAHDR (sizeof (u32) + RAND_SIZE) |
317 | #define DATAHDR (sizeof (u32) + RAND_SIZE) |
| 311 | |
318 | |
| 312 | struct vpndata_packet:vpn_packet |
319 | struct vpndata_packet : vpn_packet |
| 313 | { |
320 | { |
| 314 | u8 data[MAXVPNDATA + DATAHDR]; // seqno |
321 | u8 data[MAXVPNDATA + DATAHDR]; // seqno |
| 315 | |
322 | |
| 316 | void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
323 | void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
| 317 | tap_packet *unpack (connection *conn, u32 &seqno); |
324 | tap_packet *unpack (connection *conn, u32 &seqno); |
| … | |
… | |
| 330 | int outl = 0, outl2; |
337 | int outl = 0, outl2; |
| 331 | ptype type = PT_DATA_UNCOMPRESSED; |
338 | ptype type = PT_DATA_UNCOMPRESSED; |
| 332 | |
339 | |
| 333 | #if ENABLE_COMPRESSION |
340 | #if ENABLE_COMPRESSION |
| 334 | u8 cdata[MAX_MTU]; |
341 | u8 cdata[MAX_MTU]; |
| 335 | u32 cl; |
|
|
| 336 | |
342 | |
|
|
343 | if (conn->features & ENABLE_COMPRESSION) |
|
|
344 | { |
| 337 | cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
345 | u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
|
|
346 | |
| 338 | if (cl) |
347 | if (cl) |
| 339 | { |
348 | { |
| 340 | type = PT_DATA_COMPRESSED; |
349 | type = PT_DATA_COMPRESSED; |
| 341 | d = cdata; |
350 | d = cdata; |
| 342 | l = cl + 2; |
351 | l = cl + 2; |
| 343 | |
352 | |
| 344 | d[0] = cl >> 8; |
353 | d[0] = cl >> 8; |
| 345 | d[1] = cl; |
354 | d[1] = cl; |
|
|
355 | } |
| 346 | } |
356 | } |
| 347 | #endif |
357 | #endif |
| 348 | |
358 | |
| 349 | EVP_EncryptInit_ex (cctx, 0, 0, 0, 0); |
359 | require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0)); |
| 350 | |
360 | |
| 351 | struct { |
361 | struct { |
| 352 | #if RAND_SIZE |
362 | #if RAND_SIZE |
| 353 | u8 rnd[RAND_SIZE]; |
363 | u8 rnd[RAND_SIZE]; |
| 354 | #endif |
364 | #endif |
| … | |
… | |
| 358 | datahdr.seqno = ntohl (seqno); |
368 | datahdr.seqno = ntohl (seqno); |
| 359 | #if RAND_SIZE |
369 | #if RAND_SIZE |
| 360 | RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE); |
370 | RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE); |
| 361 | #endif |
371 | #endif |
| 362 | |
372 | |
| 363 | EVP_EncryptUpdate (cctx, |
373 | require (EVP_EncryptUpdate (cctx, |
| 364 | (unsigned char *) data + outl, &outl2, |
374 | (unsigned char *) data + outl, &outl2, |
| 365 | (unsigned char *) &datahdr, DATAHDR); |
375 | (unsigned char *) &datahdr, DATAHDR)); |
| 366 | outl += outl2; |
376 | outl += outl2; |
| 367 | |
377 | |
| 368 | EVP_EncryptUpdate (cctx, |
378 | require (EVP_EncryptUpdate (cctx, |
| 369 | (unsigned char *) data + outl, &outl2, |
379 | (unsigned char *) data + outl, &outl2, |
| 370 | (unsigned char *) d, l); |
380 | (unsigned char *) d, l)); |
| 371 | outl += outl2; |
381 | outl += outl2; |
| 372 | |
382 | |
| 373 | EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2); |
383 | require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2)); |
| 374 | outl += outl2; |
384 | outl += outl2; |
| 375 | |
385 | |
| 376 | len = outl + data_hdr_size (); |
386 | len = outl + data_hdr_size (); |
| 377 | |
387 | |
| 378 | set_hdr (type, dst); |
388 | set_hdr (type, dst); |
| … | |
… | |
| 387 | int outl = 0, outl2; |
397 | int outl = 0, outl2; |
| 388 | tap_packet *p = new tap_packet; |
398 | tap_packet *p = new tap_packet; |
| 389 | u8 *d; |
399 | u8 *d; |
| 390 | u32 l = len - data_hdr_size (); |
400 | u32 l = len - data_hdr_size (); |
| 391 | |
401 | |
| 392 | EVP_DecryptInit_ex (cctx, 0, 0, 0, 0); |
402 | require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0)); |
| 393 | |
403 | |
| 394 | #if ENABLE_COMPRESSION |
404 | #if ENABLE_COMPRESSION |
| 395 | u8 cdata[MAX_MTU]; |
405 | u8 cdata[MAX_MTU]; |
| 396 | |
406 | |
| 397 | if (type == PT_DATA_COMPRESSED) |
407 | if (type == PT_DATA_COMPRESSED) |
| … | |
… | |
| 399 | else |
409 | else |
| 400 | #endif |
410 | #endif |
| 401 | d = &(*p)[6 + 6 - DATAHDR]; |
411 | d = &(*p)[6 + 6 - DATAHDR]; |
| 402 | |
412 | |
| 403 | /* this overwrites part of the src mac, but we fix that later */ |
413 | /* this overwrites part of the src mac, but we fix that later */ |
| 404 | EVP_DecryptUpdate (cctx, |
414 | require (EVP_DecryptUpdate (cctx, |
| 405 | d, &outl2, |
415 | d, &outl2, |
| 406 | (unsigned char *)&data, len - data_hdr_size ()); |
416 | (unsigned char *)&data, len - data_hdr_size ())); |
| 407 | outl += outl2; |
417 | outl += outl2; |
| 408 | |
418 | |
| 409 | EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2); |
419 | require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2)); |
| 410 | outl += outl2; |
420 | outl += outl2; |
| 411 | |
421 | |
| 412 | seqno = ntohl (*(u32 *)(d + RAND_SIZE)); |
422 | seqno = ntohl (*(u32 *)(d + RAND_SIZE)); |
| 413 | |
423 | |
| 414 | id2mac (dst () ? dst() : THISNODE->id, p->dst); |
424 | id2mac (dst () ? dst() : THISNODE->id, p->dst); |
| … | |
… | |
| 443 | { |
453 | { |
| 444 | // actually, hmaclen cannot be checked because the hmac |
454 | // actually, hmaclen cannot be checked because the hmac |
| 445 | // field comes before this data, so peers with other |
455 | // field comes before this data, so peers with other |
| 446 | // hmacs simply will not work. |
456 | // hmacs simply will not work. |
| 447 | u8 prot_major, prot_minor, randsize, hmaclen; |
457 | u8 prot_major, prot_minor, randsize, hmaclen; |
| 448 | u8 flags, challengelen, pad2, pad3; |
458 | u8 flags, challengelen, features, pad3; |
| 449 | u32 cipher_nid, digest_nid, hmac_nid; |
459 | u32 cipher_nid, digest_nid, hmac_nid; |
| 450 | |
|
|
| 451 | const u8 curflags () const |
|
|
| 452 | { |
|
|
| 453 | return 0x80 |
|
|
| 454 | | (ENABLE_COMPRESSION ? 0x01 : 0x00); |
|
|
| 455 | } |
|
|
| 456 | |
460 | |
| 457 | void setup (ptype type, int dst); |
461 | void setup (ptype type, int dst); |
| 458 | bool chk_config () const; |
462 | bool chk_config () const; |
|
|
463 | |
|
|
464 | static u8 get_features () |
|
|
465 | { |
|
|
466 | u8 f = 0; |
|
|
467 | #if ENABLE_COMPRESSION |
|
|
468 | f |= FEATURE_COMPRESSION; |
|
|
469 | #endif |
|
|
470 | #if ENABLE_ROHC |
|
|
471 | f |= FEATURE_ROHC; |
|
|
472 | #endif |
|
|
473 | return f; |
|
|
474 | } |
| 459 | }; |
475 | }; |
| 460 | |
476 | |
| 461 | void config_packet::setup (ptype type, int dst) |
477 | void config_packet::setup (ptype type, int dst) |
| 462 | { |
478 | { |
| 463 | prot_major = PROTOCOL_MAJOR; |
479 | prot_major = PROTOCOL_MAJOR; |
| 464 | prot_minor = PROTOCOL_MINOR; |
480 | prot_minor = PROTOCOL_MINOR; |
| 465 | randsize = RAND_SIZE; |
481 | randsize = RAND_SIZE; |
| 466 | hmaclen = HMACLENGTH; |
482 | hmaclen = HMACLENGTH; |
| 467 | flags = curflags (); |
483 | flags = ENABLE_COMPRESSION ? 0x81 : 0x80; |
| 468 | challengelen = sizeof (rsachallenge); |
484 | challengelen = sizeof (rsachallenge); |
|
|
485 | features = get_features (); |
| 469 | |
486 | |
| 470 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
487 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
| 471 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
488 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
| 472 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
489 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
| 473 | |
490 | |
| … | |
… | |
| 476 | } |
493 | } |
| 477 | |
494 | |
| 478 | bool config_packet::chk_config () const |
495 | bool config_packet::chk_config () const |
| 479 | { |
496 | { |
| 480 | if (prot_major != PROTOCOL_MAJOR) |
497 | if (prot_major != PROTOCOL_MAJOR) |
| 481 | slog (L_WARN, _("major version mismatch (%d <=> %d)"), prot_major, PROTOCOL_MAJOR); |
498 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
| 482 | else if (randsize != RAND_SIZE) |
499 | else if (randsize != RAND_SIZE) |
| 483 | slog (L_WARN, _("rand size mismatch (%d <=> %d)"), randsize, RAND_SIZE); |
500 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
| 484 | else if (hmaclen != HMACLENGTH) |
501 | else if (hmaclen != HMACLENGTH) |
| 485 | slog (L_WARN, _("hmac length mismatch (%d <=> %d)"), hmaclen, HMACLENGTH); |
502 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
|
|
503 | #if 0 // this implementation should handle all flag settings |
| 486 | else if (flags != curflags ()) |
504 | else if (flags != curflags ()) |
| 487 | slog (L_WARN, _("flag mismatch (%x <=> %x)"), flags, curflags ()); |
505 | slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ()); |
|
|
506 | #endif |
| 488 | else if (challengelen != sizeof (rsachallenge)) |
507 | else if (challengelen != sizeof (rsachallenge)) |
| 489 | slog (L_WARN, _("challenge length mismatch (%d <=> %d)"), challengelen, sizeof (rsachallenge)); |
508 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
| 490 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
509 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
| 491 | slog (L_WARN, _("cipher mismatch (%x <=> %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
510 | slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
| 492 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
511 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
| 493 | slog (L_WARN, _("digest mismatch (%x <=> %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH)); |
512 | slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH)); |
| 494 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
513 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
| 495 | slog (L_WARN, _("hmac mismatch (%x <=> %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
514 | slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
| 496 | else |
515 | else |
| 497 | return true; |
516 | return true; |
| 498 | |
517 | |
| 499 | return false; |
518 | return false; |
| 500 | } |
519 | } |
| 501 | |
520 | |
| 502 | struct auth_req_packet : config_packet |
521 | struct auth_req_packet : config_packet |
| 503 | { |
522 | { |
| 504 | char magic[8]; |
523 | char magic[8]; |
| 505 | u8 initiate; // false if this is just an automatic reply |
524 | u8 initiate; // false if this is just an automatic reply |
| 506 | u8 protocols; // supported protocols (will get patches on forward) |
525 | u8 protocols; // supported protocols (will be patched on forward) |
| 507 | u8 pad2, pad3; |
526 | u8 pad2, pad3; |
| 508 | rsaid id; |
527 | rsaid id; |
| 509 | rsaencrdata encr; |
528 | rsaencrdata encr; |
| 510 | |
529 | |
| 511 | auth_req_packet (int dst, bool initiate_, u8 protocols_) |
530 | auth_req_packet (int dst, bool initiate_, u8 protocols_) |
| … | |
… | |
| 572 | { |
591 | { |
| 573 | if (ictx && octx) |
592 | if (ictx && octx) |
| 574 | { |
593 | { |
| 575 | connectmode = conf->connectmode; |
594 | connectmode = conf->connectmode; |
| 576 | |
595 | |
|
|
596 | // make sure rekeying timeouts are slightly asymmetric |
| 577 | rekey.start (NOW + ::conf.rekey); |
597 | rekey.start (NOW + ::conf.rekey |
|
|
598 | + (conf->id > THISNODE->id ? 10 : 0)); |
| 578 | keepalive.start (NOW + ::conf.keepalive); |
599 | keepalive.start (NOW + ::conf.keepalive); |
| 579 | |
600 | |
| 580 | // send queued packets |
601 | // send queued packets |
| 581 | if (ictx && octx) |
602 | if (ictx && octx) |
| 582 | { |
603 | { |
| … | |
… | |
| 595 | } |
616 | } |
| 596 | else |
617 | else |
| 597 | { |
618 | { |
| 598 | retry_cnt = 0; |
619 | retry_cnt = 0; |
| 599 | establish_connection.start (NOW + 5); |
620 | establish_connection.start (NOW + 5); |
| 600 | keepalive.reset (); |
621 | keepalive.stop (); |
| 601 | rekey.reset (); |
622 | rekey.stop (); |
| 602 | } |
623 | } |
| 603 | } |
624 | } |
| 604 | |
625 | |
| 605 | void |
626 | void |
| 606 | connection::reset_si () |
627 | connection::reset_si () |
| … | |
… | |
| 608 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
629 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
| 609 | |
630 | |
| 610 | // mask out protocols we cannot establish |
631 | // mask out protocols we cannot establish |
| 611 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
632 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
| 612 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
633 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
|
|
634 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
| 613 | |
635 | |
| 614 | si.set (conf, protocol); |
636 | si.set (conf, protocol); |
| 615 | } |
637 | } |
| 616 | |
638 | |
| 617 | // ensure sockinfo is valid, forward if necessary |
639 | // ensure sockinfo is valid, forward if necessary |
| … | |
… | |
| 637 | } |
659 | } |
| 638 | |
660 | |
| 639 | void |
661 | void |
| 640 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
662 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
| 641 | { |
663 | { |
| 642 | if (!vpn->send_vpn_packet (pkt, si, tos)) |
664 | bool ok; |
|
|
665 | |
|
|
666 | switch (si.prot) |
|
|
667 | { |
|
|
668 | case PROT_IPv4: |
|
|
669 | ok = vpn->send_ipv4_packet (pkt, si, tos); break; |
|
|
670 | case PROT_UDPv4: |
|
|
671 | ok = vpn->send_udpv4_packet (pkt, si, tos); break; |
|
|
672 | #if ENABLE_TCP |
|
|
673 | case PROT_TCPv4: |
|
|
674 | ok = vpn->send_tcpv4_packet (pkt, si, tos); break; |
|
|
675 | #endif |
|
|
676 | #if ENABLE_ICMP |
|
|
677 | case PROT_ICMPv4: |
|
|
678 | ok = vpn->send_icmpv4_packet (pkt, si, tos); break; |
|
|
679 | #endif |
|
|
680 | #if ENABLE_DNS |
|
|
681 | case PROT_DNSv4: |
|
|
682 | ok = send_dnsv4_packet (pkt, si, tos); break; |
|
|
683 | #endif |
|
|
684 | |
|
|
685 | default: |
|
|
686 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
687 | ok = false; |
|
|
688 | } |
|
|
689 | |
|
|
690 | if (!ok) |
| 643 | reset_connection (); |
691 | reset_connection (); |
| 644 | } |
692 | } |
| 645 | |
693 | |
| 646 | void |
694 | void |
| 647 | connection::send_ping (const sockinfo &si, u8 pong) |
695 | connection::send_ping (const sockinfo &si, u8 pong) |
| … | |
… | |
| 672 | connection::send_auth_request (const sockinfo &si, bool initiate) |
720 | connection::send_auth_request (const sockinfo &si, bool initiate) |
| 673 | { |
721 | { |
| 674 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
722 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
| 675 | |
723 | |
| 676 | rsachallenge chg; |
724 | rsachallenge chg; |
| 677 | |
|
|
| 678 | rsa_cache.gen (pkt->id, chg); |
725 | rsa_cache.gen (pkt->id, chg); |
| 679 | |
726 | rsa_encrypt (conf->rsa_key, chg, pkt->encr); |
| 680 | if (0 > RSA_public_encrypt (sizeof chg, |
|
|
| 681 | (unsigned char *)&chg, (unsigned char *)&pkt->encr, |
|
|
| 682 | conf->rsa_key, RSA_PKCS1_OAEP_PADDING)) |
|
|
| 683 | fatal ("RSA_public_encrypt error"); |
|
|
| 684 | |
727 | |
| 685 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
728 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
| 686 | |
729 | |
| 687 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
730 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
| 688 | |
731 | |
| … | |
… | |
| 722 | } |
765 | } |
| 723 | |
766 | |
| 724 | void |
767 | void |
| 725 | connection::establish_connection_cb (time_watcher &w) |
768 | connection::establish_connection_cb (time_watcher &w) |
| 726 | { |
769 | { |
| 727 | if (ictx || conf == THISNODE |
770 | if (!ictx |
|
|
771 | && conf != THISNODE |
| 728 | || connectmode == conf_node::C_NEVER |
772 | && connectmode != conf_node::C_NEVER |
| 729 | || connectmode == conf_node::C_DISABLED) |
773 | && connectmode != conf_node::C_DISABLED |
| 730 | w.at = TSTAMP_CANCEL; |
774 | && NOW > w.at) |
| 731 | else if (w.at <= NOW) |
|
|
| 732 | { |
775 | { |
| 733 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
776 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
| 734 | |
777 | |
| 735 | if (retry_int < 3600 * 8) |
778 | if (retry_int < conf->max_retry) |
| 736 | retry_cnt++; |
779 | retry_cnt++; |
|
|
780 | else |
|
|
781 | retry_int = conf->max_retry; |
| 737 | |
782 | |
| 738 | w.at = NOW + retry_int; |
783 | w.start (NOW + retry_int); |
| 739 | |
784 | |
| 740 | reset_si (); |
785 | reset_si (); |
| 741 | |
786 | |
| 742 | if (si.prot && !si.host) |
787 | if (si.prot && !si.host) |
| 743 | vpn->send_connect_request (conf->id); |
788 | vpn->send_connect_request (conf->id); |
| … | |
… | |
| 768 | run_script (run_script_cb (this, &connection::script_node_down), false); |
813 | run_script (run_script_cb (this, &connection::script_node_down), false); |
| 769 | } |
814 | } |
| 770 | |
815 | |
| 771 | delete ictx; ictx = 0; |
816 | delete ictx; ictx = 0; |
| 772 | delete octx; octx = 0; |
817 | delete octx; octx = 0; |
|
|
818 | #if ENABLE_DNS |
|
|
819 | dnsv4_reset_connection (); |
|
|
820 | #endif |
| 773 | |
821 | |
| 774 | si.host= 0; |
822 | si.host = 0; |
| 775 | |
823 | |
| 776 | last_activity = 0; |
824 | last_activity = 0; |
| 777 | retry_cnt = 0; |
825 | retry_cnt = 0; |
| 778 | |
826 | |
| 779 | rekey.reset (); |
827 | rekey.stop (); |
| 780 | keepalive.reset (); |
828 | keepalive.stop (); |
| 781 | establish_connection.reset (); |
829 | establish_connection.stop (); |
| 782 | } |
830 | } |
| 783 | |
831 | |
| 784 | void |
832 | void |
| 785 | connection::shutdown () |
833 | connection::shutdown () |
| 786 | { |
834 | { |
| … | |
… | |
| 791 | } |
839 | } |
| 792 | |
840 | |
| 793 | void |
841 | void |
| 794 | connection::rekey_cb (time_watcher &w) |
842 | connection::rekey_cb (time_watcher &w) |
| 795 | { |
843 | { |
| 796 | w.at = TSTAMP_CANCEL; |
|
|
| 797 | |
|
|
| 798 | reset_connection (); |
844 | reset_connection (); |
| 799 | establish_connection (); |
845 | establish_connection (); |
| 800 | } |
846 | } |
| 801 | |
847 | |
| 802 | void |
848 | void |
| 803 | connection::send_data_packet (tap_packet *pkt, bool broadcast) |
849 | connection::send_data_packet (tap_packet *pkt) |
| 804 | { |
850 | { |
| 805 | vpndata_packet *p = new vpndata_packet; |
851 | vpndata_packet *p = new vpndata_packet; |
| 806 | int tos = 0; |
852 | int tos = 0; |
| 807 | |
853 | |
| 808 | // I am not hilarious about peeking into packets, but so be it. |
854 | // I am not hilarious about peeking into packets, but so be it. |
| 809 | if (conf->inherit_tos |
855 | if (conf->inherit_tos && pkt->is_ipv4 ()) |
| 810 | && (*pkt)[12] == 0x08 && (*pkt)[13] == 0x00 // IP |
|
|
| 811 | && ((*pkt)[14] & 0xf0) == 0x40) // IPv4 |
|
|
| 812 | tos = (*pkt)[15] & IPTOS_TOS_MASK; |
856 | tos = (*pkt)[15] & IPTOS_TOS_MASK; |
| 813 | |
857 | |
| 814 | p->setup (this, broadcast ? 0 : conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs |
858 | p->setup (this, conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs |
| 815 | send_vpn_packet (p, si, tos); |
859 | send_vpn_packet (p, si, tos); |
| 816 | |
860 | |
| 817 | delete p; |
861 | delete p; |
| 818 | |
862 | |
| 819 | if (oseqno > MAX_SEQNO) |
863 | if (oseqno > MAX_SEQNO) |
| 820 | rekey (); |
864 | rekey (); |
| 821 | } |
865 | } |
| 822 | |
866 | |
| 823 | void |
867 | void |
| 824 | connection::inject_data_packet (tap_packet *pkt, bool broadcast) |
868 | connection::inject_data_packet (tap_packet *pkt, bool broadcast/*TODO DDD*/) |
| 825 | { |
869 | { |
| 826 | if (ictx && octx) |
870 | if (ictx && octx) |
| 827 | send_data_packet (pkt, broadcast); |
871 | send_data_packet (pkt); |
| 828 | else |
872 | else |
| 829 | { |
873 | { |
| 830 | if (!broadcast)//DDDD |
874 | if (!broadcast)//DDDD |
| 831 | data_queue.put (new tap_packet (*pkt)); |
875 | data_queue.put (new tap_packet (*pkt)); |
| 832 | |
876 | |
| … | |
… | |
| 838 | { |
882 | { |
| 839 | if (ictx && octx) |
883 | if (ictx && octx) |
| 840 | send_vpn_packet (pkt, si, tos); |
884 | send_vpn_packet (pkt, si, tos); |
| 841 | else |
885 | else |
| 842 | { |
886 | { |
| 843 | vpn_queue.put (new vpn_packet (*pkt)); |
887 | vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); |
| 844 | |
888 | |
| 845 | establish_connection (); |
889 | establish_connection (); |
| 846 | } |
890 | } |
| 847 | } |
891 | } |
| 848 | |
892 | |
| … | |
… | |
| 907 | if (p->initiate) |
951 | if (p->initiate) |
| 908 | send_auth_request (rsi, false); |
952 | send_auth_request (rsi, false); |
| 909 | |
953 | |
| 910 | rsachallenge k; |
954 | rsachallenge k; |
| 911 | |
955 | |
| 912 | if (0 > RSA_private_decrypt (sizeof (p->encr), |
956 | if (!rsa_decrypt (::conf.rsa_key, p->encr, k)) |
| 913 | (unsigned char *)&p->encr, (unsigned char *)&k, |
957 | { |
| 914 | ::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
|
|
| 915 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted"), |
958 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
| 916 | conf->nodename, (const char *)rsi); |
959 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
|
|
960 | break; |
|
|
961 | } |
| 917 | else |
962 | else |
| 918 | { |
963 | { |
| 919 | delete octx; |
964 | delete octx; |
| 920 | |
965 | |
| 921 | octx = new crypto_ctx (k, 1); |
966 | octx = new crypto_ctx (k, 1); |
| 922 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
967 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
| 923 | |
968 | |
|
|
969 | // compatibility code, remove when no longer required |
|
|
970 | if (p->flags & 1) p->features |= FEATURE_COMPRESSION; |
|
|
971 | |
| 924 | conf->protocols = p->protocols; |
972 | conf->protocols = p->protocols; |
|
|
973 | features = p->features & config_packet::get_features (); |
| 925 | |
974 | |
| 926 | send_auth_response (rsi, p->id, k); |
975 | send_auth_response (rsi, p->id, k); |
| 927 | |
976 | |
| 928 | connection_established (); |
977 | connection_established (); |
| 929 | |
978 | |
| … | |
… | |
| 954 | |
1003 | |
| 955 | rsachallenge chg; |
1004 | rsachallenge chg; |
| 956 | |
1005 | |
| 957 | if (!rsa_cache.find (p->id, chg)) |
1006 | if (!rsa_cache.find (p->id, chg)) |
| 958 | { |
1007 | { |
| 959 | slog (L_ERR, _("%s(%s): unrequested auth response"), |
1008 | slog (L_ERR, _("%s(%s): unrequested auth response ignored"), |
| 960 | conf->nodename, (const char *)rsi); |
1009 | conf->nodename, (const char *)rsi); |
| 961 | break; |
1010 | break; |
| 962 | } |
1011 | } |
| 963 | else |
1012 | else |
| 964 | { |
1013 | { |
| 965 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
1014 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
| 966 | |
1015 | |
| 967 | if (!p->hmac_chk (cctx)) |
1016 | if (!p->hmac_chk (cctx)) |
|
|
1017 | { |
| 968 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
1018 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
| 969 | "could be an attack, or just corruption or an synchronization error"), |
1019 | "could be an attack, or just corruption or a synchronization error"), |
| 970 | conf->nodename, (const char *)rsi); |
1020 | conf->nodename, (const char *)rsi); |
|
|
1021 | break; |
|
|
1022 | } |
| 971 | else |
1023 | else |
| 972 | { |
1024 | { |
| 973 | rsaresponse h; |
1025 | rsaresponse h; |
| 974 | |
1026 | |
| 975 | rsa_hash (p->id, chg, h); |
1027 | rsa_hash (p->id, chg, h); |
| … | |
… | |
| 1021 | { |
1073 | { |
| 1022 | vpndata_packet *p = (vpndata_packet *)pkt; |
1074 | vpndata_packet *p = (vpndata_packet *)pkt; |
| 1023 | |
1075 | |
| 1024 | if (!p->hmac_chk (ictx)) |
1076 | if (!p->hmac_chk (ictx)) |
| 1025 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
1077 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
| 1026 | "could be an attack, or just corruption or an synchronization error"), |
1078 | "could be an attack, or just corruption or a synchronization error"), |
| 1027 | conf->nodename, (const char *)rsi); |
1079 | conf->nodename, (const char *)rsi); |
| 1028 | else |
1080 | else |
| 1029 | { |
1081 | { |
| 1030 | u32 seqno; |
1082 | u32 seqno; |
| 1031 | tap_packet *d = p->unpack (this, seqno); |
1083 | tap_packet *d = p->unpack (this, seqno); |
| 1032 | |
1084 | |
| 1033 | if (iseqno.recv_ok (seqno)) |
1085 | if (iseqno.recv_ok (seqno)) |
| 1034 | { |
1086 | { |
| 1035 | vpn->tap->send (d); |
1087 | vpn->tap->send (d); |
| 1036 | |
1088 | |
| 1037 | if (p->dst () == 0) // re-broadcast |
|
|
| 1038 | for (vpn::conns_vector::iterator i = vpn->conns.begin (); i != vpn->conns.end (); ++i) |
|
|
| 1039 | { |
|
|
| 1040 | connection *c = *i; |
|
|
| 1041 | |
|
|
| 1042 | if (c->conf != THISNODE && c->conf != conf) |
|
|
| 1043 | c->inject_data_packet (d); |
|
|
| 1044 | } |
|
|
| 1045 | |
|
|
| 1046 | if (si != rsi) |
1089 | if (si != rsi) |
| 1047 | { |
1090 | { |
| 1048 | // fast re-sync on connection changes, useful especially for tcp/ip |
1091 | // fast re-sync on connection changes, useful especially for tcp/ip |
| 1049 | si = rsi; |
1092 | si = rsi; |
| 1050 | |
1093 | |
| 1051 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
1094 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
| 1052 | conf->nodename, (const char *)si, (const char *)rsi); |
1095 | conf->nodename, (const char *)si, (const char *)rsi); |
| 1053 | } |
1096 | } |
| 1054 | |
|
|
| 1055 | delete d; |
|
|
| 1056 | |
|
|
| 1057 | break; |
|
|
| 1058 | } |
1097 | } |
|
|
1098 | |
|
|
1099 | delete d; |
|
|
1100 | break; |
| 1059 | } |
1101 | } |
| 1060 | } |
1102 | } |
| 1061 | |
1103 | |
| 1062 | send_reset (rsi); |
1104 | send_reset (rsi); |
| 1063 | break; |
1105 | break; |
| … | |
… | |
| 1088 | break; |
1130 | break; |
| 1089 | |
1131 | |
| 1090 | case vpn_packet::PT_CONNECT_INFO: |
1132 | case vpn_packet::PT_CONNECT_INFO: |
| 1091 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1133 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
| 1092 | { |
1134 | { |
| 1093 | connect_info_packet *p = (connect_info_packet *) pkt; |
1135 | connect_info_packet *p = (connect_info_packet *)pkt; |
| 1094 | |
1136 | |
| 1095 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1137 | if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything |
| 1096 | |
1138 | { |
| 1097 | connection *c = vpn->conns[p->id - 1]; |
1139 | connection *c = vpn->conns[p->id - 1]; |
| 1098 | |
1140 | |
| 1099 | c->conf->protocols = p->protocols; |
1141 | c->conf->protocols = p->protocols; |
| 1100 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1142 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
| 1101 | p->si.upgrade_protocol (protocol, c->conf); |
1143 | p->si.upgrade_protocol (protocol, c->conf); |
| 1102 | |
1144 | |
| 1103 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1145 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
| 1104 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1146 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
| 1105 | |
1147 | |
| 1106 | const sockinfo &dsi = forward_si (p->si); |
1148 | const sockinfo &dsi = forward_si (p->si); |
| 1107 | |
1149 | |
| 1108 | if (dsi.valid ()) |
1150 | if (dsi.valid ()) |
| 1109 | c->send_auth_request (dsi, true); |
1151 | c->send_auth_request (dsi, true); |
|
|
1152 | } |
| 1110 | } |
1153 | } |
| 1111 | |
1154 | |
| 1112 | break; |
1155 | break; |
| 1113 | |
1156 | |
| 1114 | default: |
1157 | default: |
| … | |
… | |
| 1123 | { |
1166 | { |
| 1124 | reset_connection (); |
1167 | reset_connection (); |
| 1125 | establish_connection (); |
1168 | establish_connection (); |
| 1126 | } |
1169 | } |
| 1127 | else if (NOW < last_activity + ::conf.keepalive) |
1170 | else if (NOW < last_activity + ::conf.keepalive) |
| 1128 | w.at = last_activity + ::conf.keepalive; |
1171 | w.start (last_activity + ::conf.keepalive); |
| 1129 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1172 | else if (conf->connectmode != conf_node::C_ONDEMAND |
| 1130 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1173 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
| 1131 | { |
1174 | { |
| 1132 | send_ping (si); |
1175 | send_ping (si); |
| 1133 | w.at = NOW + 5; |
1176 | w.start (NOW + 5); |
| 1134 | } |
1177 | } |
| 1135 | else if (NOW < last_activity + ::conf.keepalive + 10) |
1178 | else if (NOW < last_activity + ::conf.keepalive + 10) |
| 1136 | // hold ondemand connections implicitly a few seconds longer |
1179 | // hold ondemand connections implicitly a few seconds longer |
| 1137 | // should delete octx, though, or something like that ;) |
1180 | // should delete octx, though, or something like that ;) |
| 1138 | w.at = last_activity + ::conf.keepalive + 10; |
1181 | w.start (last_activity + ::conf.keepalive + 10); |
| 1139 | else |
1182 | else |
| 1140 | reset_connection (); |
1183 | reset_connection (); |
| 1141 | } |
1184 | } |
| 1142 | |
1185 | |
| 1143 | void connection::send_connect_request (int id) |
1186 | void connection::send_connect_request (int id) |
| … | |
… | |
| 1178 | putenv ("STATE=down"); |
1221 | putenv ("STATE=down"); |
| 1179 | |
1222 | |
| 1180 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1223 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
| 1181 | } |
1224 | } |
| 1182 | |
1225 | |
| 1183 | connection::connection(struct vpn *vpn_) |
1226 | connection::connection (struct vpn *vpn, conf_node *conf) |
| 1184 | : vpn(vpn_) |
1227 | : vpn(vpn), conf(conf) |
| 1185 | , rekey (this, &connection::rekey_cb) |
1228 | , rekey (this, &connection::rekey_cb) |
| 1186 | , keepalive (this, &connection::keepalive_cb) |
1229 | , keepalive (this, &connection::keepalive_cb) |
| 1187 | , establish_connection (this, &connection::establish_connection_cb) |
1230 | , establish_connection (this, &connection::establish_connection_cb) |
|
|
1231 | #if ENABLE_DNS |
|
|
1232 | , dns (0) |
|
|
1233 | #endif |
| 1188 | { |
1234 | { |
| 1189 | octx = ictx = 0; |
1235 | octx = ictx = 0; |
| 1190 | retry_cnt = 0; |
1236 | retry_cnt = 0; |
| 1191 | |
1237 | |
|
|
1238 | if (!conf->protocols) // make sure some protocol is enabled |
|
|
1239 | conf->protocols = PROT_UDPv4; |
|
|
1240 | |
| 1192 | connectmode = conf_node::C_ALWAYS; // initial setting |
1241 | connectmode = conf_node::C_ALWAYS; // initial setting |
| 1193 | reset_connection (); |
1242 | reset_connection (); |
| 1194 | } |
1243 | } |
| 1195 | |
1244 | |
| 1196 | connection::~connection () |
1245 | connection::~connection () |
