1 | /* |
1 | /* |
2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
3 | Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> |
3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
|
|
5 | This file is part of GVPE. |
|
|
6 | |
5 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
6 | 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 |
7 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
8 | (at your option) any later version. |
10 | (at your option) any later version. |
9 | |
11 | |
10 | 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, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
14 | |
16 | |
15 | 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 |
16 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
18 | */ |
20 | */ |
19 | |
21 | |
20 | #include "config.h" |
22 | #include "config.h" |
21 | |
|
|
22 | extern "C" { |
|
|
23 | # include "lzf/lzf.h" |
|
|
24 | } |
|
|
25 | |
|
|
26 | #include <cassert> |
|
|
27 | |
23 | |
28 | #include <list> |
24 | #include <list> |
29 | |
25 | |
30 | #include <openssl/rand.h> |
26 | #include <openssl/rand.h> |
31 | #include <openssl/evp.h> |
27 | #include <openssl/evp.h> |
32 | #include <openssl/rsa.h> |
28 | #include <openssl/rsa.h> |
33 | #include <openssl/err.h> |
29 | #include <openssl/err.h> |
34 | |
|
|
35 | #include "gettext.h" |
|
|
36 | |
30 | |
37 | #include "conf.h" |
31 | #include "conf.h" |
38 | #include "slog.h" |
32 | #include "slog.h" |
39 | #include "device.h" |
33 | #include "device.h" |
40 | #include "vpn.h" |
34 | #include "vpn.h" |
… | |
… | |
45 | #if !HAVE_RAND_PSEUDO_BYTES |
39 | #if !HAVE_RAND_PSEUDO_BYTES |
46 | # define RAND_pseudo_bytes RAND_bytes |
40 | # define RAND_pseudo_bytes RAND_bytes |
47 | #endif |
41 | #endif |
48 | |
42 | |
49 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
43 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
|
|
44 | |
|
|
45 | #define ULTRA_FAST 1 |
|
|
46 | #define HLOG 15 |
|
|
47 | #include "lzf/lzf.h" |
|
|
48 | #include "lzf/lzf_c.c" |
|
|
49 | #include "lzf/lzf_d.c" |
50 | |
50 | |
51 | struct crypto_ctx |
51 | struct crypto_ctx |
52 | { |
52 | { |
53 | EVP_CIPHER_CTX cctx; |
53 | EVP_CIPHER_CTX cctx; |
54 | HMAC_CTX hctx; |
54 | HMAC_CTX hctx; |
… | |
… | |
93 | struct rsa_cache : list<rsa_entry> |
93 | struct rsa_cache : list<rsa_entry> |
94 | { |
94 | { |
95 | void cleaner_cb (time_watcher &w); time_watcher cleaner; |
95 | void cleaner_cb (time_watcher &w); time_watcher cleaner; |
96 | |
96 | |
97 | bool find (const rsaid &id, rsachallenge &chg) |
97 | bool find (const rsaid &id, rsachallenge &chg) |
98 | { |
98 | { |
99 | for (iterator i = begin (); i != end (); ++i) |
99 | for (iterator i = begin (); i != end (); ++i) |
100 | { |
100 | { |
101 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW) |
101 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW) |
102 | { |
102 | { |
103 | memcpy (&chg, &i->chg, sizeof chg); |
103 | memcpy (&chg, &i->chg, sizeof chg); |
104 | |
104 | |
105 | erase (i); |
105 | erase (i); |
106 | return true; |
106 | return true; |
107 | } |
107 | } |
108 | } |
108 | } |
109 | |
109 | |
110 | if (cleaner.at < NOW) |
110 | if (cleaner.at < NOW) |
111 | cleaner.start (NOW + RSA_TTL); |
111 | cleaner.start (NOW + RSA_TTL); |
112 | |
112 | |
113 | return false; |
113 | return false; |
114 | } |
114 | } |
115 | |
115 | |
116 | void gen (rsaid &id, rsachallenge &chg) |
116 | void gen (rsaid &id, rsachallenge &chg) |
117 | { |
117 | { |
118 | rsa_entry e; |
118 | rsa_entry e; |
119 | |
119 | |
120 | RAND_bytes ((unsigned char *)&id, sizeof id); |
120 | RAND_bytes ((unsigned char *)&id, sizeof id); |
121 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
121 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
122 | |
122 | |
123 | e.expire = NOW + RSA_TTL; |
123 | e.expire = NOW + RSA_TTL; |
124 | e.id = id; |
124 | e.id = id; |
125 | memcpy (&e.chg, &chg, sizeof chg); |
125 | memcpy (&e.chg, &chg, sizeof chg); |
126 | |
126 | |
127 | push_back (e); |
127 | push_back (e); |
128 | |
128 | |
129 | if (cleaner.at < NOW) |
129 | if (cleaner.at < NOW) |
130 | cleaner.start (NOW + RSA_TTL); |
130 | cleaner.start (NOW + RSA_TTL); |
131 | } |
131 | } |
132 | |
132 | |
133 | rsa_cache () |
133 | rsa_cache () |
134 | : cleaner (this, &rsa_cache::cleaner_cb) |
134 | : cleaner (this, &rsa_cache::cleaner_cb) |
135 | { } |
135 | { } |
136 | |
136 | |
137 | } rsa_cache; |
137 | } rsa_cache; |
138 | |
138 | |
139 | void rsa_cache::cleaner_cb (time_watcher &w) |
139 | void rsa_cache::cleaner_cb (time_watcher &w) |
140 | { |
140 | { |
… | |
… | |
200 | // only do action once every x seconds per host whole allowing bursts. |
200 | // only do action once every x seconds per host whole allowing bursts. |
201 | // this implementation ("splay list" ;) is inefficient, |
201 | // this implementation ("splay list" ;) is inefficient, |
202 | // but low on resources. |
202 | // but low on resources. |
203 | struct net_rate_limiter : list<net_rateinfo> |
203 | struct net_rate_limiter : list<net_rateinfo> |
204 | { |
204 | { |
205 | static const double ALPHA = 1. - 1. / 600.; // allow bursts |
205 | # define NRL_ALPHA (1. - 1. / 600.) // allow bursts |
206 | static const double CUTOFF = 10.; // one event every CUTOFF seconds |
206 | # define NRL_CUTOFF 10. // one event every CUTOFF seconds |
207 | static const double EXPIRE = CUTOFF * 30.; // expire entries after this time |
207 | # define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time |
208 | static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value |
208 | # define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value |
209 | |
209 | |
210 | bool can (const sockinfo &si) { return can((u32)si.host); } |
210 | bool can (const sockinfo &si) { return can((u32)si.host); } |
211 | bool can (u32 host); |
211 | bool can (u32 host); |
212 | }; |
212 | }; |
213 | |
213 | |
… | |
… | |
218 | iterator i; |
218 | iterator i; |
219 | |
219 | |
220 | for (i = begin (); i != end (); ) |
220 | for (i = begin (); i != end (); ) |
221 | if (i->host == host) |
221 | if (i->host == host) |
222 | break; |
222 | break; |
223 | else if (i->last < NOW - EXPIRE) |
223 | else if (i->last < NOW - NRL_EXPIRE) |
224 | i = erase (i); |
224 | i = erase (i); |
225 | else |
225 | else |
226 | i++; |
226 | i++; |
227 | |
227 | |
228 | if (i == end ()) |
228 | if (i == end ()) |
229 | { |
229 | { |
230 | net_rateinfo ri; |
230 | net_rateinfo ri; |
231 | |
231 | |
232 | ri.host = host; |
232 | ri.host = host; |
233 | ri.pcnt = 1.; |
233 | ri.pcnt = 1.; |
234 | ri.diff = MAXDIF; |
234 | ri.diff = NRL_MAXDIF; |
235 | ri.last = NOW; |
235 | ri.last = NOW; |
236 | |
236 | |
237 | push_front (ri); |
237 | push_front (ri); |
238 | |
238 | |
239 | return true; |
239 | return true; |
… | |
… | |
241 | else |
241 | else |
242 | { |
242 | { |
243 | net_rateinfo ri (*i); |
243 | net_rateinfo ri (*i); |
244 | erase (i); |
244 | erase (i); |
245 | |
245 | |
246 | ri.pcnt = ri.pcnt * ALPHA; |
246 | ri.pcnt = ri.pcnt * NRL_ALPHA; |
247 | ri.diff = ri.diff * ALPHA + (NOW - ri.last); |
247 | ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last); |
248 | |
248 | |
249 | ri.last = NOW; |
249 | ri.last = NOW; |
250 | |
250 | |
251 | double dif = ri.diff / ri.pcnt; |
251 | double dif = ri.diff / ri.pcnt; |
252 | |
252 | |
253 | bool send = dif > CUTOFF; |
253 | bool send = dif > NRL_CUTOFF; |
254 | |
254 | |
255 | if (dif > MAXDIF) |
255 | if (dif > NRL_MAXDIF) |
256 | { |
256 | { |
257 | ri.pcnt = 1.; |
257 | ri.pcnt = 1.; |
258 | ri.diff = MAXDIF; |
258 | ri.diff = NRL_MAXDIF; |
259 | } |
259 | } |
260 | else if (send) |
260 | else if (send) |
261 | ri.pcnt++; |
261 | ri.pcnt++; |
262 | |
262 | |
263 | push_front (ri); |
263 | push_front (ri); |
… | |
… | |
333 | int outl = 0, outl2; |
333 | int outl = 0, outl2; |
334 | ptype type = PT_DATA_UNCOMPRESSED; |
334 | ptype type = PT_DATA_UNCOMPRESSED; |
335 | |
335 | |
336 | #if ENABLE_COMPRESSION |
336 | #if ENABLE_COMPRESSION |
337 | u8 cdata[MAX_MTU]; |
337 | u8 cdata[MAX_MTU]; |
338 | u32 cl; |
|
|
339 | |
338 | |
|
|
339 | if (conn->features & ENABLE_COMPRESSION) |
|
|
340 | { |
340 | cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
341 | u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
|
|
342 | |
341 | if (cl) |
343 | if (cl) |
342 | { |
344 | { |
343 | type = PT_DATA_COMPRESSED; |
345 | type = PT_DATA_COMPRESSED; |
344 | d = cdata; |
346 | d = cdata; |
345 | l = cl + 2; |
347 | l = cl + 2; |
346 | |
348 | |
347 | d[0] = cl >> 8; |
349 | d[0] = cl >> 8; |
348 | d[1] = cl; |
350 | d[1] = cl; |
|
|
351 | } |
349 | } |
352 | } |
350 | #endif |
353 | #endif |
351 | |
354 | |
352 | require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0)); |
355 | require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0)); |
353 | |
356 | |
… | |
… | |
446 | { |
449 | { |
447 | // actually, hmaclen cannot be checked because the hmac |
450 | // actually, hmaclen cannot be checked because the hmac |
448 | // field comes before this data, so peers with other |
451 | // field comes before this data, so peers with other |
449 | // hmacs simply will not work. |
452 | // hmacs simply will not work. |
450 | u8 prot_major, prot_minor, randsize, hmaclen; |
453 | u8 prot_major, prot_minor, randsize, hmaclen; |
451 | u8 flags, challengelen, pad2, pad3; |
454 | u8 flags, challengelen, features, pad3; |
452 | u32 cipher_nid, digest_nid, hmac_nid; |
455 | u32 cipher_nid, digest_nid, hmac_nid; |
453 | |
|
|
454 | const u8 curflags () const |
|
|
455 | { |
|
|
456 | return 0x80 |
|
|
457 | | (ENABLE_COMPRESSION ? 0x01 : 0x00); |
|
|
458 | } |
|
|
459 | |
456 | |
460 | void setup (ptype type, int dst); |
457 | void setup (ptype type, int dst); |
461 | bool chk_config () const; |
458 | bool chk_config () const; |
|
|
459 | |
|
|
460 | static u8 get_features () |
|
|
461 | { |
|
|
462 | u8 f = 0; |
|
|
463 | #if ENABLE_COMPRESSION |
|
|
464 | f |= FEATURE_COMPRESSION; |
|
|
465 | #endif |
|
|
466 | #if ENABLE_ROHC |
|
|
467 | f |= FEATURE_ROHC; |
|
|
468 | #endif |
|
|
469 | return f; |
|
|
470 | } |
462 | }; |
471 | }; |
463 | |
472 | |
464 | void config_packet::setup (ptype type, int dst) |
473 | void config_packet::setup (ptype type, int dst) |
465 | { |
474 | { |
466 | prot_major = PROTOCOL_MAJOR; |
475 | prot_major = PROTOCOL_MAJOR; |
467 | prot_minor = PROTOCOL_MINOR; |
476 | prot_minor = PROTOCOL_MINOR; |
468 | randsize = RAND_SIZE; |
477 | randsize = RAND_SIZE; |
469 | hmaclen = HMACLENGTH; |
478 | hmaclen = HMACLENGTH; |
470 | flags = curflags (); |
479 | flags = 0; |
471 | challengelen = sizeof (rsachallenge); |
480 | challengelen = sizeof (rsachallenge); |
|
|
481 | features = get_features (); |
472 | |
482 | |
473 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
483 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
474 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
484 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
475 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
485 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
476 | |
486 | |
… | |
… | |
484 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
494 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
485 | else if (randsize != RAND_SIZE) |
495 | else if (randsize != RAND_SIZE) |
486 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
496 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
487 | else if (hmaclen != HMACLENGTH) |
497 | else if (hmaclen != HMACLENGTH) |
488 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
498 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
489 | else if (flags != curflags ()) |
|
|
490 | slog (L_WARN, _("flag mismatch (remote %x <=> local %x)"), flags, curflags ()); |
|
|
491 | else if (challengelen != sizeof (rsachallenge)) |
499 | else if (challengelen != sizeof (rsachallenge)) |
492 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
500 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
493 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
501 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
494 | slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
502 | slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
495 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
503 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
… | |
… | |
575 | { |
583 | { |
576 | if (ictx && octx) |
584 | if (ictx && octx) |
577 | { |
585 | { |
578 | connectmode = conf->connectmode; |
586 | connectmode = conf->connectmode; |
579 | |
587 | |
|
|
588 | // make sure rekeying timeouts are slightly asymmetric |
580 | rekey.start (NOW + ::conf.rekey); |
589 | rekey.start (NOW + ::conf.rekey |
|
|
590 | + (conf->id > THISNODE->id ? 10 : 0)); |
581 | keepalive.start (NOW + ::conf.keepalive); |
591 | keepalive.start (NOW + ::conf.keepalive); |
582 | |
592 | |
583 | // send queued packets |
593 | // send queued packets |
584 | if (ictx && octx) |
594 | if (ictx && octx) |
585 | { |
595 | { |
… | |
… | |
611 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
621 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
612 | |
622 | |
613 | // mask out protocols we cannot establish |
623 | // mask out protocols we cannot establish |
614 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
624 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
615 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
625 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
|
|
626 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
616 | |
627 | |
617 | si.set (conf, protocol); |
628 | si.set (conf, protocol); |
618 | } |
629 | } |
619 | |
630 | |
620 | // ensure sockinfo is valid, forward if necessary |
631 | // ensure sockinfo is valid, forward if necessary |
… | |
… | |
625 | { |
636 | { |
626 | connection *r = vpn->find_router (); |
637 | connection *r = vpn->find_router (); |
627 | |
638 | |
628 | if (r) |
639 | if (r) |
629 | { |
640 | { |
630 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"), |
641 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"), |
631 | conf->nodename, r->conf->nodename); |
642 | conf->nodename, r->conf->nodename, (const char *)r->si); |
632 | return r->si; |
643 | return r->si; |
633 | } |
644 | } |
634 | else |
645 | else |
635 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
646 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
636 | conf->nodename); |
647 | conf->nodename); |
… | |
… | |
726 | && conf != THISNODE |
737 | && conf != THISNODE |
727 | && connectmode != conf_node::C_NEVER |
738 | && connectmode != conf_node::C_NEVER |
728 | && connectmode != conf_node::C_DISABLED |
739 | && connectmode != conf_node::C_DISABLED |
729 | && NOW > w.at) |
740 | && NOW > w.at) |
730 | { |
741 | { |
731 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
742 | w.at = TSTAMP_MAX; // first disable this watcher in case of recursion |
732 | |
743 | |
733 | if (retry_int < 3600 * 8) |
744 | double retry_int = double (retry_cnt & 3 |
734 | retry_cnt++; |
745 | ? (retry_cnt & 3) + 1 |
735 | |
746 | : 1 << (retry_cnt >> 2)); |
736 | w.start (NOW + retry_int); |
|
|
737 | |
747 | |
738 | reset_si (); |
748 | reset_si (); |
|
|
749 | |
|
|
750 | bool slow = si.prot & PROT_SLOW; |
739 | |
751 | |
740 | if (si.prot && !si.host) |
752 | if (si.prot && !si.host) |
741 | vpn->send_connect_request (conf->id); |
753 | vpn->send_connect_request (conf->id); |
742 | else |
754 | else |
743 | { |
755 | { |
744 | const sockinfo &dsi = forward_si (si); |
756 | const sockinfo &dsi = forward_si (si); |
|
|
757 | |
|
|
758 | slow = slow || (dsi.prot & PROT_SLOW); |
745 | |
759 | |
746 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
760 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
747 | { |
761 | { |
748 | if (retry_cnt < 4) |
762 | if (retry_cnt < 4) |
749 | send_auth_request (dsi, true); |
763 | send_auth_request (dsi, true); |
750 | else |
764 | else |
751 | send_ping (dsi, 0); |
765 | send_ping (dsi, 0); |
752 | } |
766 | } |
753 | } |
767 | } |
|
|
768 | |
|
|
769 | retry_int *= slow ? 8. : 0.7; |
|
|
770 | |
|
|
771 | if (retry_int < conf->max_retry) |
|
|
772 | retry_cnt++; |
|
|
773 | else |
|
|
774 | retry_int = conf->max_retry; |
|
|
775 | |
|
|
776 | w.start (NOW + retry_int); |
754 | } |
777 | } |
755 | } |
778 | } |
756 | |
779 | |
757 | void |
780 | void |
758 | connection::reset_connection () |
781 | connection::reset_connection () |
… | |
… | |
761 | { |
784 | { |
762 | slog (L_INFO, _("%s(%s): connection lost"), |
785 | slog (L_INFO, _("%s(%s): connection lost"), |
763 | conf->nodename, (const char *)si); |
786 | conf->nodename, (const char *)si); |
764 | |
787 | |
765 | if (::conf.script_node_down) |
788 | if (::conf.script_node_down) |
766 | run_script (run_script_cb (this, &connection::script_node_down), false); |
789 | if (!run_script (run_script_cb (this, &connection::script_node_down), false)) |
|
|
790 | slog (L_WARN, _("node-down command execution failed, continuing.")); |
767 | } |
791 | } |
768 | |
792 | |
769 | delete ictx; ictx = 0; |
793 | delete ictx; ictx = 0; |
770 | delete octx; octx = 0; |
794 | delete octx; octx = 0; |
|
|
795 | #if ENABLE_DNS |
|
|
796 | dnsv4_reset_connection (); |
|
|
797 | #endif |
771 | |
798 | |
772 | si.host= 0; |
799 | si.host = 0; |
773 | |
800 | |
774 | last_activity = 0; |
801 | last_activity = 0; |
775 | retry_cnt = 0; |
802 | retry_cnt = 0; |
776 | |
803 | |
777 | rekey.stop (); |
804 | rekey.stop (); |
… | |
… | |
819 | { |
846 | { |
820 | if (ictx && octx) |
847 | if (ictx && octx) |
821 | send_data_packet (pkt); |
848 | send_data_packet (pkt); |
822 | else |
849 | else |
823 | { |
850 | { |
824 | if (!broadcast)//DDDD |
851 | if (!broadcast) |
825 | data_queue.put (new tap_packet (*pkt)); |
852 | data_queue.put (new tap_packet (*pkt)); |
826 | |
853 | |
827 | establish_connection (); |
854 | establish_connection (); |
828 | } |
855 | } |
829 | } |
856 | } |
… | |
… | |
915 | |
942 | |
916 | octx = new crypto_ctx (k, 1); |
943 | octx = new crypto_ctx (k, 1); |
917 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
944 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
918 | |
945 | |
919 | conf->protocols = p->protocols; |
946 | conf->protocols = p->protocols; |
|
|
947 | features = p->features & config_packet::get_features (); |
920 | |
948 | |
921 | send_auth_response (rsi, p->id, k); |
949 | send_auth_response (rsi, p->id, k); |
922 | |
950 | |
923 | connection_established (); |
951 | connection_established (); |
924 | |
952 | |
… | |
… | |
988 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
1016 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
989 | conf->nodename, (const char *)rsi, |
1017 | conf->nodename, (const char *)rsi, |
990 | p->prot_major, p->prot_minor); |
1018 | p->prot_major, p->prot_minor); |
991 | |
1019 | |
992 | if (::conf.script_node_up) |
1020 | if (::conf.script_node_up) |
993 | run_script (run_script_cb (this, &connection::script_node_up), false); |
1021 | if (!run_script (run_script_cb (this, &connection::script_node_up), false)) |
|
|
1022 | slog (L_WARN, _("node-up command execution failed, continuing.")); |
994 | |
1023 | |
995 | break; |
1024 | break; |
996 | } |
1025 | } |
997 | else |
1026 | else |
998 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
1027 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
… | |
… | |
1032 | { |
1061 | { |
1033 | vpn->tap->send (d); |
1062 | vpn->tap->send (d); |
1034 | |
1063 | |
1035 | if (si != rsi) |
1064 | if (si != rsi) |
1036 | { |
1065 | { |
1037 | // fast re-sync on connection changes, useful especially for tcp/ip |
1066 | // fast re-sync on source address changes, useful especially for tcp/ip |
1038 | si = rsi; |
1067 | si = rsi; |
1039 | |
1068 | |
1040 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
1069 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
1041 | conf->nodename, (const char *)si, (const char *)rsi); |
1070 | conf->nodename, (const char *)si, (const char *)rsi); |
1042 | } |
1071 | } |
1043 | |
|
|
1044 | delete d; |
|
|
1045 | |
|
|
1046 | break; |
|
|
1047 | } |
1072 | } |
|
|
1073 | |
|
|
1074 | delete d; |
|
|
1075 | break; |
1048 | } |
1076 | } |
1049 | } |
1077 | } |
1050 | |
1078 | |
1051 | send_reset (rsi); |
1079 | send_reset (rsi); |
1052 | break; |
1080 | break; |
… | |
… | |
1054 | case vpn_packet::PT_CONNECT_REQ: |
1082 | case vpn_packet::PT_CONNECT_REQ: |
1055 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1083 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1056 | { |
1084 | { |
1057 | connect_req_packet *p = (connect_req_packet *) pkt; |
1085 | connect_req_packet *p = (connect_req_packet *) pkt; |
1058 | |
1086 | |
1059 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1087 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1060 | connection *c = vpn->conns[p->id - 1]; |
|
|
1061 | conf->protocols = p->protocols; |
|
|
1062 | |
|
|
1063 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n", |
|
|
1064 | conf->id, p->id, c->ictx && c->octx); |
|
|
1065 | |
|
|
1066 | if (c->ictx && c->octx) |
|
|
1067 | { |
1088 | { |
|
|
1089 | connection *c = vpn->conns[p->id - 1]; |
|
|
1090 | conf->protocols = p->protocols; |
|
|
1091 | |
|
|
1092 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n", |
|
|
1093 | conf->id, p->id, c->ictx && c->octx); |
|
|
1094 | |
|
|
1095 | if (c->ictx && c->octx) |
|
|
1096 | { |
1068 | // send connect_info packets to both sides, in case one is |
1097 | // send connect_info packets to both sides, in case one is |
1069 | // behind a nat firewall (or both ;) |
1098 | // behind a nat firewall (or both ;) |
1070 | c->send_connect_info (conf->id, si, conf->protocols); |
1099 | c->send_connect_info (conf->id, si, conf->protocols); |
1071 | send_connect_info (c->conf->id, c->si, c->conf->protocols); |
1100 | send_connect_info (c->conf->id, c->si, c->conf->protocols); |
|
|
1101 | } |
|
|
1102 | else |
|
|
1103 | c->establish_connection (); |
1072 | } |
1104 | } |
1073 | else |
1105 | else |
1074 | c->establish_connection (); |
1106 | slog (L_WARN, |
|
|
1107 | _("received authenticated connection request from unknown node #%d, config file mismatch?"), |
|
|
1108 | p->id); |
1075 | } |
1109 | } |
1076 | |
1110 | |
1077 | break; |
1111 | break; |
1078 | |
1112 | |
1079 | case vpn_packet::PT_CONNECT_INFO: |
1113 | case vpn_packet::PT_CONNECT_INFO: |
1080 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1114 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1081 | { |
1115 | { |
1082 | connect_info_packet *p = (connect_info_packet *) pkt; |
1116 | connect_info_packet *p = (connect_info_packet *)pkt; |
1083 | |
1117 | |
1084 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1118 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1085 | |
1119 | { |
1086 | connection *c = vpn->conns[p->id - 1]; |
1120 | connection *c = vpn->conns[p->id - 1]; |
1087 | |
1121 | |
1088 | c->conf->protocols = p->protocols; |
1122 | c->conf->protocols = p->protocols; |
1089 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1123 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1090 | p->si.upgrade_protocol (protocol, c->conf); |
1124 | p->si.upgrade_protocol (protocol, c->conf); |
1091 | |
1125 | |
1092 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1126 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1093 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1127 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1094 | |
1128 | |
1095 | const sockinfo &dsi = forward_si (p->si); |
1129 | const sockinfo &dsi = forward_si (p->si); |
1096 | |
1130 | |
1097 | if (dsi.valid ()) |
1131 | if (dsi.valid ()) |
1098 | c->send_auth_request (dsi, true); |
1132 | c->send_auth_request (dsi, true); |
|
|
1133 | } |
|
|
1134 | else |
|
|
1135 | slog (L_WARN, |
|
|
1136 | _("received authenticated connection request from unknown node #%d, config file mismatch?"), |
|
|
1137 | p->id); |
1099 | } |
1138 | } |
1100 | |
1139 | |
1101 | break; |
1140 | break; |
1102 | |
1141 | |
1103 | default: |
1142 | default: |
… | |
… | |
1138 | send_vpn_packet (p, si); |
1177 | send_vpn_packet (p, si); |
1139 | |
1178 | |
1140 | delete p; |
1179 | delete p; |
1141 | } |
1180 | } |
1142 | |
1181 | |
|
|
1182 | void connection::script_init_env (const char *ext) |
|
|
1183 | { |
|
|
1184 | char *env; |
|
|
1185 | asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env); |
|
|
1186 | asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env); |
|
|
1187 | asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext, |
|
|
1188 | 0xfe, 0xfd, 0x80, 0x00, conf->id >> 8, |
|
|
1189 | conf->id & 0xff); putenv (env); |
|
|
1190 | } |
|
|
1191 | |
1143 | void connection::script_node () |
1192 | void connection::script_init_connect_env () |
1144 | { |
1193 | { |
1145 | vpn->script_if_up (); |
1194 | vpn->script_init_env (); |
1146 | |
1195 | |
1147 | char *env; |
1196 | char *env; |
1148 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1197 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1149 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1198 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1150 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1199 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1151 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1200 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1152 | } |
1201 | } |
1153 | |
1202 | |
1154 | const char *connection::script_node_up () |
1203 | const char *connection::script_node_up () |
1155 | { |
1204 | { |
1156 | script_node (); |
1205 | script_init_connect_env (); |
1157 | |
1206 | |
1158 | putenv ("STATE=up"); |
1207 | putenv ("STATE=up"); |
1159 | |
1208 | |
|
|
1209 | char *filename; |
|
|
1210 | asprintf (&filename, |
|
|
1211 | "%s/%s", |
|
|
1212 | confbase, |
1160 | return ::conf.script_node_up ? ::conf.script_node_up : "node-up"; |
1213 | ::conf.script_node_up ? ::conf.script_node_up : "node-up"); |
|
|
1214 | |
|
|
1215 | return filename; |
1161 | } |
1216 | } |
1162 | |
1217 | |
1163 | const char *connection::script_node_down () |
1218 | const char *connection::script_node_down () |
1164 | { |
1219 | { |
1165 | script_node (); |
1220 | script_init_connect_env (); |
1166 | |
1221 | |
1167 | putenv ("STATE=down"); |
1222 | putenv ("STATE=down"); |
1168 | |
1223 | |
1169 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1224 | char *filename; |
1170 | } |
1225 | asprintf (&filename, |
|
|
1226 | "%s/%s", |
|
|
1227 | confbase, |
|
|
1228 | ::conf.script_node_down ? ::conf.script_node_down : "node-down"); |
1171 | |
1229 | |
|
|
1230 | return filename; |
|
|
1231 | } |
|
|
1232 | |
1172 | connection::connection(struct vpn *vpn_) |
1233 | connection::connection (struct vpn *vpn, conf_node *conf) |
1173 | : vpn(vpn_) |
1234 | : vpn(vpn), conf(conf) |
1174 | , rekey (this, &connection::rekey_cb) |
1235 | , rekey (this, &connection::rekey_cb) |
1175 | , keepalive (this, &connection::keepalive_cb) |
1236 | , keepalive (this, &connection::keepalive_cb) |
1176 | , establish_connection (this, &connection::establish_connection_cb) |
1237 | , establish_connection (this, &connection::establish_connection_cb) |
|
|
1238 | #if ENABLE_DNS |
|
|
1239 | , dns (0) |
|
|
1240 | #endif |
1177 | { |
1241 | { |
1178 | octx = ictx = 0; |
1242 | octx = ictx = 0; |
1179 | retry_cnt = 0; |
1243 | retry_cnt = 0; |
1180 | |
1244 | |
|
|
1245 | if (!conf->protocols) // make sure some protocol is enabled |
|
|
1246 | conf->protocols = PROT_UDPv4; |
|
|
1247 | |
1181 | connectmode = conf_node::C_ALWAYS; // initial setting |
1248 | connectmode = conf_node::C_ALWAYS; // initial setting |
1182 | reset_connection (); |
1249 | reset_connection (); |
1183 | } |
1250 | } |
1184 | |
1251 | |
1185 | connection::~connection () |
1252 | connection::~connection () |