1 | /* |
1 | /* |
2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
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3 | Copyright (C) 2003 Marc Lehmann <pcg@goof.com> |
3 | |
4 | |
4 | This program is free software; you can redistribute it and/or modify |
5 | This program is free software; you can redistribute it and/or modify |
5 | it under the terms of the GNU General Public License as published by |
6 | 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 |
7 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
8 | (at your option) any later version. |
… | |
… | |
22 | # include "lzf/lzf.h" |
23 | # include "lzf/lzf.h" |
23 | } |
24 | } |
24 | |
25 | |
25 | #include <list> |
26 | #include <list> |
26 | |
27 | |
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28 | #include <openssl/rand.h> |
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29 | #include <openssl/evp.h> |
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30 | #include <openssl/rsa.h> |
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31 | #include <openssl/err.h> |
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32 | |
27 | #include "gettext.h" |
33 | #include "gettext.h" |
28 | |
34 | |
29 | #include "conf.h" |
35 | #include "conf.h" |
30 | #include "slog.h" |
36 | #include "slog.h" |
31 | #include "device.h" |
37 | #include "device.h" |
32 | #include "protocol.h" |
38 | #include "vpn.h" |
33 | #include "connection.h" |
39 | #include "connection.h" |
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40 | |
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41 | #include "netcompat.h" |
34 | |
42 | |
35 | #if !HAVE_RAND_PSEUDO_BYTES |
43 | #if !HAVE_RAND_PSEUDO_BYTES |
36 | # define RAND_pseudo_bytes RAND_bytes |
44 | # define RAND_pseudo_bytes RAND_bytes |
37 | #endif |
45 | #endif |
38 | |
46 | |
… | |
… | |
80 | rsachallenge chg; |
88 | rsachallenge chg; |
81 | }; |
89 | }; |
82 | |
90 | |
83 | struct rsa_cache : list<rsa_entry> |
91 | struct rsa_cache : list<rsa_entry> |
84 | { |
92 | { |
85 | void cleaner_cb (tstamp &ts); time_watcher cleaner; |
93 | void cleaner_cb (time_watcher &w); time_watcher cleaner; |
86 | |
94 | |
87 | bool find (const rsaid &id, rsachallenge &chg) |
95 | bool find (const rsaid &id, rsachallenge &chg) |
88 | { |
96 | { |
89 | for (iterator i = begin (); i != end (); ++i) |
97 | for (iterator i = begin (); i != end (); ++i) |
90 | { |
98 | { |
… | |
… | |
124 | : cleaner (this, &rsa_cache::cleaner_cb) |
132 | : cleaner (this, &rsa_cache::cleaner_cb) |
125 | { } |
133 | { } |
126 | |
134 | |
127 | } rsa_cache; |
135 | } rsa_cache; |
128 | |
136 | |
129 | void rsa_cache::cleaner_cb (tstamp &ts) |
137 | void rsa_cache::cleaner_cb (time_watcher &w) |
130 | { |
138 | { |
131 | if (empty ()) |
139 | if (empty ()) |
132 | ts = TSTAMP_CANCEL; |
140 | w.at = TSTAMP_CANCEL; |
133 | else |
141 | else |
134 | { |
142 | { |
135 | ts = NOW + RSA_TTL; |
143 | w.at = NOW + RSA_TTL; |
136 | |
144 | |
137 | for (iterator i = begin (); i != end (); ) |
145 | for (iterator i = begin (); i != end (); ) |
138 | if (i->expire <= NOW) |
146 | if (i->expire <= NOW) |
139 | i = erase (i); |
147 | i = erase (i); |
140 | else |
148 | else |
… | |
… | |
142 | } |
150 | } |
143 | } |
151 | } |
144 | |
152 | |
145 | ////////////////////////////////////////////////////////////////////////////// |
153 | ////////////////////////////////////////////////////////////////////////////// |
146 | |
154 | |
147 | void pkt_queue::put (tap_packet *p) |
155 | void pkt_queue::put (net_packet *p) |
148 | { |
156 | { |
149 | if (queue[i]) |
157 | if (queue[i]) |
150 | { |
158 | { |
151 | delete queue[i]; |
159 | delete queue[i]; |
152 | j = (j + 1) % QUEUEDEPTH; |
160 | j = (j + 1) % QUEUEDEPTH; |
… | |
… | |
155 | queue[i] = p; |
163 | queue[i] = p; |
156 | |
164 | |
157 | i = (i + 1) % QUEUEDEPTH; |
165 | i = (i + 1) % QUEUEDEPTH; |
158 | } |
166 | } |
159 | |
167 | |
160 | tap_packet *pkt_queue::get () |
168 | net_packet *pkt_queue::get () |
161 | { |
169 | { |
162 | tap_packet *p = queue[j]; |
170 | net_packet *p = queue[j]; |
163 | |
171 | |
164 | if (p) |
172 | if (p) |
165 | { |
173 | { |
166 | queue[j] = 0; |
174 | queue[j] = 0; |
167 | j = (j + 1) % QUEUEDEPTH; |
175 | j = (j + 1) % QUEUEDEPTH; |
… | |
… | |
192 | // 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. |
193 | // this implementation ("splay list" ;) is inefficient, |
201 | // this implementation ("splay list" ;) is inefficient, |
194 | // but low on resources. |
202 | // but low on resources. |
195 | struct net_rate_limiter : list<net_rateinfo> |
203 | struct net_rate_limiter : list<net_rateinfo> |
196 | { |
204 | { |
197 | static const double ALPHA = 1. - 1. / 90.; // allow bursts |
205 | static const double ALPHA = 1. - 1. / 600.; // allow bursts |
198 | static const double CUTOFF = 20.; // one event every CUTOFF seconds |
206 | static const double CUTOFF = 10.; // one event every CUTOFF seconds |
199 | static const double EXPIRE = CUTOFF * 30.; // expire entries after this time |
207 | static const double EXPIRE = CUTOFF * 30.; // expire entries after this time |
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208 | static const double MAXDIF = CUTOFF * (1. / (1. - ALPHA)); // maximum diff /count value |
200 | |
209 | |
201 | bool can (const sockinfo &si) { return can((u32)si.host); } |
210 | bool can (const sockinfo &si) { return can((u32)si.host); } |
202 | bool can (u32 host); |
211 | bool can (u32 host); |
203 | }; |
212 | }; |
204 | |
213 | |
205 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
214 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
206 | |
215 | |
… | |
… | |
220 | { |
229 | { |
221 | net_rateinfo ri; |
230 | net_rateinfo ri; |
222 | |
231 | |
223 | ri.host = host; |
232 | ri.host = host; |
224 | ri.pcnt = 1.; |
233 | ri.pcnt = 1.; |
225 | ri.diff = CUTOFF * (1. / (1. - ALPHA)); |
234 | ri.diff = MAXDIF; |
226 | ri.last = NOW; |
235 | ri.last = NOW; |
227 | |
236 | |
228 | push_front (ri); |
237 | push_front (ri); |
229 | |
238 | |
230 | return true; |
239 | return true; |
… | |
… | |
237 | ri.pcnt = ri.pcnt * ALPHA; |
246 | ri.pcnt = ri.pcnt * ALPHA; |
238 | ri.diff = ri.diff * ALPHA + (NOW - ri.last); |
247 | ri.diff = ri.diff * ALPHA + (NOW - ri.last); |
239 | |
248 | |
240 | ri.last = NOW; |
249 | ri.last = NOW; |
241 | |
250 | |
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251 | double dif = ri.diff / ri.pcnt; |
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252 | |
242 | bool send = ri.diff / ri.pcnt > CUTOFF; |
253 | bool send = dif > CUTOFF; |
243 | |
254 | |
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255 | if (dif > MAXDIF) |
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256 | { |
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257 | ri.pcnt = 1.; |
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258 | ri.diff = MAXDIF; |
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259 | } |
244 | if (send) |
260 | else if (send) |
245 | ri.pcnt++; |
261 | ri.pcnt++; |
246 | |
262 | |
247 | push_front (ri); |
263 | push_front (ri); |
248 | |
264 | |
249 | return send; |
265 | return send; |
… | |
… | |
280 | hmac_gen (ctx); |
296 | hmac_gen (ctx); |
281 | |
297 | |
282 | return !memcmp (hmac, hmac_digest, HMACLENGTH); |
298 | return !memcmp (hmac, hmac_digest, HMACLENGTH); |
283 | } |
299 | } |
284 | |
300 | |
285 | void vpn_packet::set_hdr (ptype type, unsigned int dst) |
301 | void vpn_packet::set_hdr (ptype type_, unsigned int dst) |
286 | { |
302 | { |
287 | this->type = type; |
303 | type = type_; |
288 | |
304 | |
289 | int src = THISNODE->id; |
305 | int src = THISNODE->id; |
290 | |
306 | |
291 | src1 = src; |
307 | src1 = src; |
292 | srcdst = ((src >> 8) << 4) | (dst >> 8); |
308 | srcdst = ((src >> 8) << 4) | (dst >> 8); |
… | |
… | |
462 | set_hdr (type, dst); |
478 | set_hdr (type, dst); |
463 | } |
479 | } |
464 | |
480 | |
465 | bool config_packet::chk_config () const |
481 | bool config_packet::chk_config () const |
466 | { |
482 | { |
467 | return prot_major == PROTOCOL_MAJOR |
483 | if (prot_major != PROTOCOL_MAJOR) |
468 | && randsize == RAND_SIZE |
484 | slog (L_WARN, _("major version mismatch (%d <=> %d)"), prot_major, PROTOCOL_MAJOR); |
469 | && hmaclen == HMACLENGTH |
485 | else if (randsize != RAND_SIZE) |
470 | && flags == curflags () |
486 | slog (L_WARN, _("rand size mismatch (%d <=> %d)"), randsize, RAND_SIZE); |
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487 | else if (hmaclen != HMACLENGTH) |
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488 | slog (L_WARN, _("hmac length mismatch (%d <=> %d)"), hmaclen, HMACLENGTH); |
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489 | else if (flags != curflags ()) |
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490 | slog (L_WARN, _("flag mismatch (%x <=> %x)"), flags, curflags ()); |
471 | && challengelen == sizeof (rsachallenge) |
491 | else if (challengelen != sizeof (rsachallenge)) |
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492 | slog (L_WARN, _("challenge length mismatch (%d <=> %d)"), challengelen, sizeof (rsachallenge)); |
472 | && cipher_nid == htonl (EVP_CIPHER_nid (CIPHER)) |
493 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
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494 | slog (L_WARN, _("cipher mismatch (%x <=> %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
473 | && digest_nid == htonl (EVP_MD_type (RSA_HASH)) |
495 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
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496 | slog (L_WARN, _("digest mismatch (%x <=> %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH)); |
474 | && hmac_nid == htonl (EVP_MD_type (DIGEST)); |
497 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
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498 | slog (L_WARN, _("hmac mismatch (%x <=> %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
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499 | else |
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500 | return true; |
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501 | |
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502 | return false; |
475 | } |
503 | } |
476 | |
504 | |
477 | struct auth_req_packet : config_packet |
505 | struct auth_req_packet : config_packet |
478 | { |
506 | { |
479 | char magic[8]; |
507 | char magic[8]; |
… | |
… | |
541 | }; |
569 | }; |
542 | |
570 | |
543 | ///////////////////////////////////////////////////////////////////////////// |
571 | ///////////////////////////////////////////////////////////////////////////// |
544 | |
572 | |
545 | void |
573 | void |
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574 | connection::connection_established () |
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575 | { |
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576 | if (ictx && octx) |
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577 | { |
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578 | connectmode = conf->connectmode; |
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579 | |
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580 | rekey.start (NOW + ::conf.rekey); |
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581 | keepalive.start (NOW + ::conf.keepalive); |
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582 | |
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583 | // send queued packets |
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584 | if (ictx && octx) |
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585 | { |
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586 | while (tap_packet *p = (tap_packet *)data_queue.get ()) |
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587 | { |
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588 | send_data_packet (p); |
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589 | delete p; |
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590 | } |
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591 | |
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592 | while (vpn_packet *p = (vpn_packet *)vpn_queue.get ()) |
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593 | { |
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594 | send_vpn_packet (p, si, IPTOS_RELIABILITY); |
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595 | delete p; |
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596 | } |
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597 | } |
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598 | } |
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599 | else |
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600 | { |
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601 | retry_cnt = 0; |
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602 | establish_connection.start (NOW + 5); |
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603 | keepalive.reset (); |
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604 | rekey.reset (); |
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605 | } |
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606 | } |
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607 | |
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608 | void |
546 | connection::reset_dstaddr () |
609 | connection::reset_si () |
547 | { |
610 | { |
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611 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
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612 | |
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613 | // mask out protocols we cannot establish |
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614 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
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615 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
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616 | |
548 | si.set (conf); |
617 | si.set (conf, protocol); |
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618 | } |
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619 | |
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620 | // ensure sockinfo is valid, forward if necessary |
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621 | const sockinfo & |
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622 | connection::forward_si (const sockinfo &si) const |
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623 | { |
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624 | if (!si.valid ()) |
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625 | { |
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626 | connection *r = vpn->find_router (); |
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627 | |
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628 | if (r) |
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629 | { |
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630 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"), |
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631 | conf->nodename, r->conf->nodename); |
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632 | return r->si; |
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633 | } |
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634 | else |
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635 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
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636 | conf->nodename); |
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637 | } |
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638 | |
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639 | return si; |
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640 | } |
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641 | |
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642 | void |
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643 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
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644 | { |
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645 | if (!vpn->send_vpn_packet (pkt, si, tos)) |
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646 | reset_connection (); |
549 | } |
647 | } |
550 | |
648 | |
551 | void |
649 | void |
552 | connection::send_ping (const sockinfo &si, u8 pong) |
650 | connection::send_ping (const sockinfo &si, u8 pong) |
553 | { |
651 | { |
… | |
… | |
575 | |
673 | |
576 | void |
674 | void |
577 | connection::send_auth_request (const sockinfo &si, bool initiate) |
675 | connection::send_auth_request (const sockinfo &si, bool initiate) |
578 | { |
676 | { |
579 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
677 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
580 | |
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581 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
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582 | |
678 | |
583 | rsachallenge chg; |
679 | rsachallenge chg; |
584 | |
680 | |
585 | rsa_cache.gen (pkt->id, chg); |
681 | rsa_cache.gen (pkt->id, chg); |
586 | |
682 | |
… | |
… | |
589 | conf->rsa_key, RSA_PKCS1_OAEP_PADDING)) |
685 | conf->rsa_key, RSA_PKCS1_OAEP_PADDING)) |
590 | fatal ("RSA_public_encrypt error"); |
686 | fatal ("RSA_public_encrypt error"); |
591 | |
687 | |
592 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
688 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
593 | |
689 | |
594 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly |
690 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
595 | |
691 | |
596 | delete pkt; |
692 | delete pkt; |
597 | } |
693 | } |
598 | |
694 | |
599 | void |
695 | void |
… | |
… | |
627 | |
723 | |
628 | delete r; |
724 | delete r; |
629 | } |
725 | } |
630 | |
726 | |
631 | void |
727 | void |
632 | connection::establish_connection_cb (tstamp &ts) |
728 | connection::establish_connection_cb (time_watcher &w) |
633 | { |
729 | { |
634 | if (ictx || conf == THISNODE |
730 | if (ictx || conf == THISNODE |
635 | || connectmode == conf_node::C_NEVER |
731 | || connectmode == conf_node::C_NEVER |
636 | || connectmode == conf_node::C_DISABLED) |
732 | || connectmode == conf_node::C_DISABLED) |
637 | ts = TSTAMP_CANCEL; |
733 | w.at = TSTAMP_CANCEL; |
638 | else if (ts <= NOW) |
734 | else if (w.at <= NOW) |
639 | { |
735 | { |
640 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
736 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
641 | |
737 | |
642 | if (retry_int < 3600 * 8) |
738 | if (retry_int < 3600 * 8) |
643 | retry_cnt++; |
739 | retry_cnt++; |
644 | |
740 | |
645 | ts = NOW + retry_int; |
741 | w.at = NOW + retry_int; |
646 | |
742 | |
647 | if (conf->hostname) |
743 | reset_si (); |
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744 | |
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745 | if (si.prot && !si.host) |
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746 | vpn->send_connect_request (conf->id); |
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747 | else |
648 | { |
748 | { |
649 | reset_dstaddr (); |
749 | const sockinfo &dsi = forward_si (si); |
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750 | |
650 | if (si.host && auth_rate_limiter.can (si)) |
751 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
651 | { |
752 | { |
652 | if (retry_cnt < 4) |
753 | if (retry_cnt < 4) |
653 | send_auth_request (si, true); |
754 | send_auth_request (dsi, true); |
654 | else |
755 | else |
655 | send_ping (si, 0); |
756 | send_ping (dsi, 0); |
656 | } |
757 | } |
657 | } |
758 | } |
658 | else |
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659 | vpn->connect_request (conf->id); |
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660 | } |
759 | } |
661 | } |
760 | } |
662 | |
761 | |
663 | void |
762 | void |
664 | connection::reset_connection () |
763 | connection::reset_connection () |
… | |
… | |
693 | |
792 | |
694 | reset_connection (); |
793 | reset_connection (); |
695 | } |
794 | } |
696 | |
795 | |
697 | void |
796 | void |
698 | connection::rekey_cb (tstamp &ts) |
797 | connection::rekey_cb (time_watcher &w) |
699 | { |
798 | { |
700 | ts = TSTAMP_CANCEL; |
799 | w.at = TSTAMP_CANCEL; |
701 | |
800 | |
702 | reset_connection (); |
801 | reset_connection (); |
703 | establish_connection (); |
802 | establish_connection (); |
704 | } |
803 | } |
705 | |
804 | |
706 | void |
805 | void |
707 | connection::send_data_packet (tap_packet *pkt, bool broadcast) |
806 | connection::send_data_packet (tap_packet *pkt) |
708 | { |
807 | { |
709 | vpndata_packet *p = new vpndata_packet; |
808 | vpndata_packet *p = new vpndata_packet; |
710 | int tos = 0; |
809 | int tos = 0; |
711 | |
810 | |
712 | if (conf->inherit_tos |
811 | // I am not hilarious about peeking into packets, but so be it. |
713 | && (*pkt)[12] == 0x08 && (*pkt)[13] == 0x00 // IP |
812 | if (conf->inherit_tos && pkt->is_ipv4 ()) |
714 | && ((*pkt)[14] & 0xf0) == 0x40) // IPv4 |
|
|
715 | tos = (*pkt)[15] & IPTOS_TOS_MASK; |
813 | tos = (*pkt)[15] & IPTOS_TOS_MASK; |
716 | |
814 | |
717 | p->setup (this, broadcast ? 0 : conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs |
815 | p->setup (this, conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs |
718 | send_vpn_packet (p, si, tos); |
816 | send_vpn_packet (p, si, tos); |
719 | |
817 | |
720 | delete p; |
818 | delete p; |
721 | |
819 | |
722 | if (oseqno > MAX_SEQNO) |
820 | if (oseqno > MAX_SEQNO) |
723 | rekey (); |
821 | rekey (); |
724 | } |
822 | } |
725 | |
823 | |
726 | void |
824 | void |
727 | connection::inject_data_packet (tap_packet *pkt, bool broadcast) |
825 | connection::inject_data_packet (tap_packet *pkt, bool broadcast/*TODO DDD*/) |
728 | { |
826 | { |
729 | if (ictx && octx) |
827 | if (ictx && octx) |
730 | send_data_packet (pkt, broadcast); |
828 | send_data_packet (pkt); |
731 | else |
829 | else |
732 | { |
830 | { |
733 | if (!broadcast)//DDDD |
831 | if (!broadcast)//DDDD |
734 | queue.put (new tap_packet (*pkt)); |
832 | data_queue.put (new tap_packet (*pkt)); |
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833 | |
|
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834 | establish_connection (); |
|
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835 | } |
|
|
836 | } |
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837 | |
|
|
838 | void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
|
|
839 | { |
|
|
840 | if (ictx && octx) |
|
|
841 | send_vpn_packet (pkt, si, tos); |
|
|
842 | else |
|
|
843 | { |
|
|
844 | vpn_queue.put (new vpn_packet (*pkt)); |
735 | |
845 | |
736 | establish_connection (); |
846 | establish_connection (); |
737 | } |
847 | } |
738 | } |
848 | } |
739 | |
849 | |
… | |
… | |
745 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
855 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
746 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
856 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
747 | |
857 | |
748 | switch (pkt->typ ()) |
858 | switch (pkt->typ ()) |
749 | { |
859 | { |
750 | case vpn_packet::PT_PING: |
860 | case vpn_packet::PT_PING: |
751 | // we send pings instead of auth packets after some retries, |
861 | // we send pings instead of auth packets after some retries, |
752 | // so reset the retry counter and establish a connection |
862 | // so reset the retry counter and establish a connection |
753 | // when we receive a ping. |
863 | // when we receive a ping. |
754 | if (!ictx) |
864 | if (!ictx) |
|
|
865 | { |
|
|
866 | if (auth_rate_limiter.can (rsi)) |
|
|
867 | send_auth_request (rsi, true); |
|
|
868 | } |
|
|
869 | else |
|
|
870 | send_ping (rsi, 1); // pong |
|
|
871 | |
|
|
872 | break; |
|
|
873 | |
|
|
874 | case vpn_packet::PT_PONG: |
|
|
875 | break; |
|
|
876 | |
|
|
877 | case vpn_packet::PT_RESET: |
755 | { |
878 | { |
756 | if (auth_rate_limiter.can (rsi)) |
879 | reset_connection (); |
757 | send_auth_request (rsi, true); |
880 | |
|
|
881 | config_packet *p = (config_packet *) pkt; |
|
|
882 | |
|
|
883 | if (!p->chk_config ()) |
|
|
884 | { |
|
|
885 | slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"), |
|
|
886 | conf->nodename, (const char *)rsi); |
|
|
887 | connectmode = conf_node::C_DISABLED; |
|
|
888 | } |
|
|
889 | else if (connectmode == conf_node::C_ALWAYS) |
|
|
890 | establish_connection (); |
758 | } |
891 | } |
759 | else |
|
|
760 | send_ping (rsi, 1); // pong |
|
|
761 | |
|
|
762 | break; |
892 | break; |
763 | |
893 | |
764 | case vpn_packet::PT_PONG: |
|
|
765 | break; |
|
|
766 | |
|
|
767 | case vpn_packet::PT_RESET: |
894 | case vpn_packet::PT_AUTH_REQ: |
768 | { |
895 | if (auth_rate_limiter.can (rsi)) |
769 | reset_connection (); |
|
|
770 | |
|
|
771 | config_packet *p = (config_packet *) pkt; |
|
|
772 | |
|
|
773 | if (!p->chk_config ()) |
|
|
774 | { |
896 | { |
|
|
897 | auth_req_packet *p = (auth_req_packet *) pkt; |
|
|
898 | |
|
|
899 | slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate); |
|
|
900 | |
|
|
901 | if (p->chk_config () && !strncmp (p->magic, MAGIC, 8)) |
|
|
902 | { |
|
|
903 | if (p->prot_minor != PROTOCOL_MINOR) |
|
|
904 | slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
|
|
905 | conf->nodename, (const char *)rsi, |
|
|
906 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
|
|
907 | |
|
|
908 | if (p->initiate) |
|
|
909 | send_auth_request (rsi, false); |
|
|
910 | |
|
|
911 | rsachallenge k; |
|
|
912 | |
|
|
913 | if (0 > RSA_private_decrypt (sizeof (p->encr), |
|
|
914 | (unsigned char *)&p->encr, (unsigned char *)&k, |
|
|
915 | ::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
|
|
916 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
|
|
917 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
|
|
918 | else |
|
|
919 | { |
|
|
920 | delete octx; |
|
|
921 | |
|
|
922 | octx = new crypto_ctx (k, 1); |
|
|
923 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
|
|
924 | |
|
|
925 | conf->protocols = p->protocols; |
|
|
926 | |
|
|
927 | send_auth_response (rsi, p->id, k); |
|
|
928 | |
|
|
929 | connection_established (); |
|
|
930 | |
|
|
931 | break; |
|
|
932 | } |
|
|
933 | } |
|
|
934 | else |
775 | slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"), |
935 | slog (L_WARN, _("%s(%s): protocol mismatch"), |
776 | conf->nodename, (const char *)rsi); |
936 | conf->nodename, (const char *)rsi); |
777 | connectmode = conf_node::C_DISABLED; |
937 | |
|
|
938 | send_reset (rsi); |
778 | } |
939 | } |
779 | else if (connectmode == conf_node::C_ALWAYS) |
940 | |
780 | establish_connection (); |
|
|
781 | } |
|
|
782 | break; |
941 | break; |
783 | |
942 | |
784 | case vpn_packet::PT_AUTH_REQ: |
943 | case vpn_packet::PT_AUTH_RES: |
785 | if (auth_rate_limiter.can (rsi)) |
|
|
786 | { |
944 | { |
787 | auth_req_packet *p = (auth_req_packet *) pkt; |
945 | auth_res_packet *p = (auth_res_packet *) pkt; |
788 | |
946 | |
789 | slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate); |
947 | slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id); |
790 | |
948 | |
791 | if (p->chk_config () && !strncmp (p->magic, MAGIC, 8)) |
949 | if (p->chk_config ()) |
792 | { |
950 | { |
793 | if (p->prot_minor != PROTOCOL_MINOR) |
951 | if (p->prot_minor != PROTOCOL_MINOR) |
794 | slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
952 | slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
795 | conf->nodename, (const char *)rsi, |
953 | conf->nodename, (const char *)rsi, |
796 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
954 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
797 | |
955 | |
798 | if (p->initiate) |
|
|
799 | send_auth_request (rsi, false); |
|
|
800 | |
|
|
801 | rsachallenge k; |
956 | rsachallenge chg; |
802 | |
957 | |
803 | if (0 > RSA_private_decrypt (sizeof (p->encr), |
958 | if (!rsa_cache.find (p->id, chg)) |
804 | (unsigned char *)&p->encr, (unsigned char *)&k, |
959 | { |
805 | ::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
960 | slog (L_ERR, _("%s(%s): unrequested auth response ignored"), |
806 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted"), |
|
|
807 | conf->nodename, (const char *)rsi); |
961 | conf->nodename, (const char *)rsi); |
|
|
962 | break; |
|
|
963 | } |
808 | else |
964 | else |
809 | { |
965 | { |
810 | retry_cnt = 0; |
966 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
811 | establish_connection.set (NOW + 8); //? ;) |
967 | |
812 | keepalive.reset (); |
968 | if (!p->hmac_chk (cctx)) |
|
|
969 | { |
|
|
970 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
|
|
971 | "could be an attack, or just corruption or an synchronization error"), |
|
|
972 | conf->nodename, (const char *)rsi); |
|
|
973 | break; |
|
|
974 | } |
813 | rekey.reset (); |
975 | else |
|
|
976 | { |
|
|
977 | rsaresponse h; |
814 | |
978 | |
|
|
979 | rsa_hash (p->id, chg, h); |
|
|
980 | |
|
|
981 | if (!memcmp ((u8 *)&h, (u8 *)p->response, sizeof h)) |
|
|
982 | { |
|
|
983 | prot_minor = p->prot_minor; |
|
|
984 | |
|
|
985 | delete ictx; ictx = cctx; |
|
|
986 | |
|
|
987 | iseqno.reset (ntohl (*(u32 *)&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid |
|
|
988 | |
|
|
989 | si = rsi; |
|
|
990 | protocol = rsi.prot; |
|
|
991 | |
|
|
992 | connection_established (); |
|
|
993 | |
|
|
994 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
|
|
995 | conf->nodename, (const char *)rsi, |
|
|
996 | p->prot_major, p->prot_minor); |
|
|
997 | |
|
|
998 | if (::conf.script_node_up) |
|
|
999 | run_script (run_script_cb (this, &connection::script_node_up), false); |
|
|
1000 | |
|
|
1001 | break; |
|
|
1002 | } |
|
|
1003 | else |
|
|
1004 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
|
|
1005 | conf->nodename, (const char *)rsi); |
|
|
1006 | } |
|
|
1007 | |
815 | delete ictx; |
1008 | delete cctx; |
816 | ictx = 0; |
|
|
817 | |
|
|
818 | delete octx; |
|
|
819 | |
|
|
820 | octx = new crypto_ctx (k, 1); |
|
|
821 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
|
|
822 | |
|
|
823 | conf->protocols = p->protocols; |
|
|
824 | send_auth_response (rsi, p->id, k); |
|
|
825 | |
|
|
826 | break; |
|
|
827 | } |
1009 | } |
828 | } |
1010 | } |
829 | |
|
|
830 | send_reset (rsi); |
|
|
831 | } |
1011 | } |
832 | |
1012 | |
|
|
1013 | send_reset (rsi); |
833 | break; |
1014 | break; |
834 | |
1015 | |
835 | case vpn_packet::PT_AUTH_RES: |
1016 | case vpn_packet::PT_DATA_COMPRESSED: |
836 | { |
1017 | #if !ENABLE_COMPRESSION |
837 | auth_res_packet *p = (auth_res_packet *) pkt; |
1018 | send_reset (rsi); |
|
|
1019 | break; |
|
|
1020 | #endif |
838 | |
1021 | |
839 | slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id); |
1022 | case vpn_packet::PT_DATA_UNCOMPRESSED: |
840 | |
1023 | |
841 | if (p->chk_config ()) |
1024 | if (ictx && octx) |
842 | { |
1025 | { |
843 | if (p->prot_minor != PROTOCOL_MINOR) |
1026 | vpndata_packet *p = (vpndata_packet *)pkt; |
844 | slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
|
|
845 | conf->nodename, (const char *)rsi, |
|
|
846 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
|
|
847 | |
1027 | |
848 | rsachallenge chg; |
1028 | if (!p->hmac_chk (ictx)) |
849 | |
1029 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
850 | if (!rsa_cache.find (p->id, chg)) |
1030 | "could be an attack, or just corruption or an synchronization error"), |
851 | slog (L_ERR, _("%s(%s): unrequested auth response"), |
|
|
852 | conf->nodename, (const char *)rsi); |
1031 | conf->nodename, (const char *)rsi); |
853 | else |
1032 | else |
854 | { |
1033 | { |
855 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
|
|
856 | |
|
|
857 | if (!p->hmac_chk (cctx)) |
|
|
858 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
|
|
859 | "could be an attack, or just corruption or an synchronization error"), |
|
|
860 | conf->nodename, (const char *)rsi); |
|
|
861 | else |
1034 | u32 seqno; |
|
|
1035 | tap_packet *d = p->unpack (this, seqno); |
|
|
1036 | |
|
|
1037 | if (iseqno.recv_ok (seqno)) |
862 | { |
1038 | { |
863 | rsaresponse h; |
1039 | vpn->tap->send (d); |
864 | |
1040 | |
865 | rsa_hash (p->id, chg, h); |
1041 | if (si != rsi) |
866 | |
|
|
867 | if (!memcmp ((u8 *)&h, (u8 *)p->response, sizeof h)) |
|
|
868 | { |
1042 | { |
869 | prot_minor = p->prot_minor; |
1043 | // fast re-sync on connection changes, useful especially for tcp/ip |
870 | |
|
|
871 | delete ictx; ictx = cctx; |
|
|
872 | |
|
|
873 | iseqno.reset (ntohl (*(u32 *)&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid |
|
|
874 | |
|
|
875 | si = rsi; |
1044 | si = rsi; |
876 | |
1045 | |
877 | rekey.set (NOW + ::conf.rekey); |
1046 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
878 | keepalive.set (NOW + ::conf.keepalive); |
|
|
879 | |
|
|
880 | // send queued packets |
|
|
881 | while (tap_packet *p = queue.get ()) |
|
|
882 | { |
|
|
883 | send_data_packet (p); |
|
|
884 | delete p; |
|
|
885 | } |
|
|
886 | |
|
|
887 | connectmode = conf->connectmode; |
|
|
888 | |
|
|
889 | slog (L_INFO, _("%s(%s): %s connection established, protocol version %d.%d"), |
|
|
890 | conf->nodename, (const char *)rsi, |
1047 | conf->nodename, (const char *)si, (const char *)rsi); |
891 | strprotocol (protocol), |
|
|
892 | p->prot_major, p->prot_minor); |
|
|
893 | |
|
|
894 | if (::conf.script_node_up) |
|
|
895 | run_script (run_script_cb (this, &connection::script_node_up), false); |
|
|
896 | |
|
|
897 | break; |
|
|
898 | } |
1048 | } |
|
|
1049 | |
899 | else |
1050 | delete d; |
900 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
1051 | |
901 | conf->nodename, (const char *)rsi); |
1052 | break; |
902 | } |
1053 | } |
903 | |
|
|
904 | delete cctx; |
|
|
905 | } |
1054 | } |
906 | } |
1055 | } |
907 | } |
|
|
908 | |
1056 | |
909 | send_reset (rsi); |
1057 | send_reset (rsi); |
910 | break; |
1058 | break; |
911 | |
1059 | |
912 | case vpn_packet::PT_DATA_COMPRESSED: |
|
|
913 | #if !ENABLE_COMPRESSION |
|
|
914 | send_reset (rsi); |
|
|
915 | break; |
|
|
916 | #endif |
|
|
917 | |
|
|
918 | case vpn_packet::PT_DATA_UNCOMPRESSED: |
|
|
919 | |
|
|
920 | if (ictx && octx) |
|
|
921 | { |
|
|
922 | vpndata_packet *p = (vpndata_packet *)pkt; |
|
|
923 | |
|
|
924 | if (rsi == si) |
|
|
925 | { |
|
|
926 | if (!p->hmac_chk (ictx)) |
|
|
927 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
|
|
928 | "could be an attack, or just corruption or an synchronization error"), |
|
|
929 | conf->nodename, (const char *)rsi); |
|
|
930 | else |
|
|
931 | { |
|
|
932 | u32 seqno; |
|
|
933 | tap_packet *d = p->unpack (this, seqno); |
|
|
934 | |
|
|
935 | if (iseqno.recv_ok (seqno)) |
|
|
936 | { |
|
|
937 | vpn->tap->send (d); |
|
|
938 | |
|
|
939 | if (p->dst () == 0) // re-broadcast |
|
|
940 | for (vpn::conns_vector::iterator i = vpn->conns.begin (); i != vpn->conns.end (); ++i) |
|
|
941 | { |
|
|
942 | connection *c = *i; |
|
|
943 | |
|
|
944 | if (c->conf != THISNODE && c->conf != conf) |
|
|
945 | c->inject_data_packet (d); |
|
|
946 | } |
|
|
947 | |
|
|
948 | delete d; |
|
|
949 | |
|
|
950 | break; |
|
|
951 | } |
|
|
952 | } |
|
|
953 | } |
|
|
954 | else |
|
|
955 | slog (L_ERR, _("received data packet from unknown source %s"), (const char *)rsi); |
|
|
956 | } |
|
|
957 | |
|
|
958 | send_reset (rsi); |
|
|
959 | break; |
|
|
960 | |
|
|
961 | case vpn_packet::PT_CONNECT_REQ: |
1060 | case vpn_packet::PT_CONNECT_REQ: |
962 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1061 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
963 | { |
1062 | { |
964 | connect_req_packet *p = (connect_req_packet *) pkt; |
1063 | connect_req_packet *p = (connect_req_packet *) pkt; |
965 | |
1064 | |
966 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1065 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
967 | conf->protocols = p->protocols; |
|
|
968 | connection *c = vpn->conns[p->id - 1]; |
1066 | connection *c = vpn->conns[p->id - 1]; |
|
|
1067 | conf->protocols = p->protocols; |
969 | |
1068 | |
970 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n", |
1069 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n", |
971 | conf->id, p->id, c->ictx && c->octx); |
1070 | conf->id, p->id, c->ictx && c->octx); |
972 | |
1071 | |
973 | if (c->ictx && c->octx) |
1072 | if (c->ictx && c->octx) |
974 | { |
1073 | { |
975 | // send connect_info packets to both sides, in case one is |
1074 | // send connect_info packets to both sides, in case one is |
976 | // behind a nat firewall (or both ;) |
1075 | // behind a nat firewall (or both ;) |
977 | c->send_connect_info (conf->id, si, conf->protocols); |
1076 | c->send_connect_info (conf->id, si, conf->protocols); |
978 | send_connect_info (c->conf->id, c->si, c->conf->protocols); |
1077 | send_connect_info (c->conf->id, c->si, c->conf->protocols); |
979 | } |
1078 | } |
|
|
1079 | else |
|
|
1080 | c->establish_connection (); |
980 | } |
1081 | } |
981 | |
1082 | |
982 | break; |
1083 | break; |
983 | |
1084 | |
984 | case vpn_packet::PT_CONNECT_INFO: |
1085 | case vpn_packet::PT_CONNECT_INFO: |
985 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1086 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
986 | { |
1087 | { |
987 | connect_info_packet *p = (connect_info_packet *) pkt; |
1088 | connect_info_packet *p = (connect_info_packet *) pkt; |
988 | |
1089 | |
989 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1090 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
990 | conf->protocols = p->protocols; |
1091 | |
991 | connection *c = vpn->conns[p->id - 1]; |
1092 | connection *c = vpn->conns[p->id - 1]; |
992 | |
1093 | |
|
|
1094 | c->conf->protocols = p->protocols; |
|
|
1095 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
|
|
1096 | p->si.upgrade_protocol (protocol, c->conf); |
|
|
1097 | |
993 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1098 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
994 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1099 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
995 | |
1100 | |
|
|
1101 | const sockinfo &dsi = forward_si (p->si); |
|
|
1102 | |
|
|
1103 | if (dsi.valid ()) |
996 | c->send_auth_request (p->si, true); |
1104 | c->send_auth_request (dsi, true); |
997 | } |
1105 | } |
998 | |
1106 | |
999 | break; |
1107 | break; |
1000 | |
1108 | |
1001 | default: |
1109 | default: |
1002 | send_reset (rsi); |
1110 | send_reset (rsi); |
1003 | break; |
1111 | break; |
1004 | |
|
|
1005 | } |
1112 | } |
1006 | } |
1113 | } |
1007 | |
1114 | |
1008 | void connection::keepalive_cb (tstamp &ts) |
1115 | void connection::keepalive_cb (time_watcher &w) |
1009 | { |
1116 | { |
1010 | if (NOW >= last_activity + ::conf.keepalive + 30) |
1117 | if (NOW >= last_activity + ::conf.keepalive + 30) |
1011 | { |
1118 | { |
1012 | reset_connection (); |
1119 | reset_connection (); |
1013 | establish_connection (); |
1120 | establish_connection (); |
1014 | } |
1121 | } |
1015 | else if (NOW < last_activity + ::conf.keepalive) |
1122 | else if (NOW < last_activity + ::conf.keepalive) |
1016 | ts = last_activity + ::conf.keepalive; |
1123 | w.at = last_activity + ::conf.keepalive; |
1017 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1124 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1018 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1125 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1019 | { |
1126 | { |
1020 | send_ping (si); |
1127 | send_ping (si); |
1021 | ts = NOW + 5; |
1128 | w.at = NOW + 5; |
1022 | } |
1129 | } |
|
|
1130 | else if (NOW < last_activity + ::conf.keepalive + 10) |
|
|
1131 | // hold ondemand connections implicitly a few seconds longer |
|
|
1132 | // should delete octx, though, or something like that ;) |
|
|
1133 | w.at = last_activity + ::conf.keepalive + 10; |
1023 | else |
1134 | else |
1024 | reset_connection (); |
1135 | reset_connection (); |
1025 | } |
1136 | } |
1026 | |
1137 | |
1027 | void connection::connect_request (int id) |
1138 | void connection::send_connect_request (int id) |
1028 | { |
1139 | { |
1029 | connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols); |
1140 | connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols); |
1030 | |
1141 | |
1031 | slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id); |
1142 | slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id); |
1032 | p->hmac_set (octx); |
1143 | p->hmac_set (octx); |
… | |
… | |
1035 | delete p; |
1146 | delete p; |
1036 | } |
1147 | } |
1037 | |
1148 | |
1038 | void connection::script_node () |
1149 | void connection::script_node () |
1039 | { |
1150 | { |
1040 | vpn->script_if_up (0); |
1151 | vpn->script_if_up (); |
1041 | |
1152 | |
1042 | char *env; |
1153 | char *env; |
1043 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1154 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1044 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1155 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1045 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1156 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1046 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1157 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1047 | } |
1158 | } |
1048 | |
1159 | |
1049 | const char *connection::script_node_up (int) |
1160 | const char *connection::script_node_up () |
1050 | { |
1161 | { |
1051 | script_node (); |
1162 | script_node (); |
1052 | |
1163 | |
1053 | putenv ("STATE=up"); |
1164 | putenv ("STATE=up"); |
1054 | |
1165 | |
1055 | return ::conf.script_node_up ? ::conf.script_node_up : "node-up"; |
1166 | return ::conf.script_node_up ? ::conf.script_node_up : "node-up"; |
1056 | } |
1167 | } |
1057 | |
1168 | |
1058 | const char *connection::script_node_down (int) |
1169 | const char *connection::script_node_down () |
1059 | { |
1170 | { |
1060 | script_node (); |
1171 | script_node (); |
1061 | |
1172 | |
1062 | putenv ("STATE=down"); |
1173 | putenv ("STATE=down"); |
1063 | |
1174 | |
1064 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1175 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1065 | } |
|
|
1066 | |
|
|
1067 | // send a vpn packet out to other hosts |
|
|
1068 | void |
|
|
1069 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
1070 | { |
|
|
1071 | if (protocol & PROT_IPv4) |
|
|
1072 | vpn->send_ipv4_packet (pkt, si, tos); |
|
|
1073 | else |
|
|
1074 | vpn->send_udpv4_packet (pkt, si, tos); |
|
|
1075 | } |
1176 | } |
1076 | |
1177 | |
1077 | connection::connection(struct vpn *vpn_) |
1178 | connection::connection(struct vpn *vpn_) |
1078 | : vpn(vpn_) |
1179 | : vpn(vpn_) |
1079 | , rekey (this, &connection::rekey_cb) |
1180 | , rekey (this, &connection::rekey_cb) |