1 | /* |
1 | /* |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
|
|
3 | Copyright (C) 2003-2004 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. |
… | |
… | |
18 | |
19 | |
19 | #include "config.h" |
20 | #include "config.h" |
20 | |
21 | |
21 | #include <list> |
22 | #include <list> |
22 | |
23 | |
|
|
24 | #include <cstdio> |
|
|
25 | #include <cstring> |
23 | #include <cstdlib> |
26 | #include <cstdlib> |
24 | #include <cstring> |
|
|
25 | #include <cstdio> |
|
|
26 | |
27 | |
27 | #include <sys/types.h> |
28 | #include <sys/types.h> |
28 | #include <sys/socket.h> |
29 | #include <sys/socket.h> |
29 | #include <sys/poll.h> |
|
|
30 | #include <sys/wait.h> |
30 | #include <sys/wait.h> |
31 | #include <errno.h> |
31 | #include <errno.h> |
32 | #include <time.h> |
32 | #include <time.h> |
33 | #include <unistd.h> |
33 | #include <unistd.h> |
34 | #include <fcntl.h> |
34 | #include <fcntl.h> |
35 | #include <sys/socket.h> |
35 | #include <sys/socket.h> |
36 | #include <netinet/in.h> |
36 | |
37 | #include <arpa/inet.h> |
37 | #include "netcompat.h" |
38 | #include <net/if.h> |
|
|
39 | #ifdef HAVE_NETINET_IN_SYSTM_H |
|
|
40 | # include <netinet/in_systm.h> |
|
|
41 | #endif |
|
|
42 | #ifdef HAVE_NETINET_IP_H |
|
|
43 | # include <netinet/ip.h> |
|
|
44 | #endif |
|
|
45 | #ifdef HAVE_NETINET_TCP_H |
|
|
46 | # include <netinet/tcp.h> |
|
|
47 | #endif |
|
|
48 | #if ENABLE_ICMP |
|
|
49 | # include <netinet/ip_icmp.h> |
|
|
50 | #endif |
|
|
51 | |
38 | |
52 | #include "pidfile.h" |
39 | #include "pidfile.h" |
53 | |
40 | |
54 | #include "connection.h" |
41 | #include "connection.h" |
55 | #include "util.h" |
42 | #include "util.h" |
56 | #include "vpn.h" |
43 | #include "vpn.h" |
57 | |
44 | |
58 | #if !defined(SOL_IP) && defined(IPPROTO_IP) |
45 | vpn network; // THE vpn (bad design...) |
59 | # define SOL_IP IPPROTO_IP |
|
|
60 | #endif |
|
|
61 | |
46 | |
62 | ///////////////////////////////////////////////////////////////////////////// |
47 | ///////////////////////////////////////////////////////////////////////////// |
63 | |
48 | |
64 | const char *vpn::script_if_up () |
49 | const char *vpn::script_if_up () |
65 | { |
50 | { |
… | |
… | |
69 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
54 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
70 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
55 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
71 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
56 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
72 | |
57 | |
73 | char *env; |
58 | char *env; |
74 | asprintf (&env, "CONFBASE=%s", confbase); |
59 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
75 | putenv (env); |
|
|
76 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); |
60 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env); |
77 | putenv (env); |
|
|
78 | asprintf (&env, "NODEID=%d", THISNODE->id); |
61 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
79 | putenv (env); |
|
|
80 | asprintf (&env, "IFNAME=%s", tap->interface ()); |
62 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
81 | putenv (env); |
63 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
|
|
64 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
82 | asprintf (&env, "MTU=%d", mtu); |
65 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
83 | putenv (env); |
|
|
84 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
66 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
85 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
67 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
86 | THISNODE->id & 0xff); |
68 | THISNODE->id & 0xff); |
87 | putenv (env); |
69 | putenv (env); |
88 | |
70 | |
… | |
… | |
116 | sockinfo si (THISNODE, PROT_IPv4); |
98 | sockinfo si (THISNODE, PROT_IPv4); |
117 | |
99 | |
118 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
100 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
119 | { |
101 | { |
120 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
102 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
121 | exit (1); |
103 | exit (EXIT_FAILURE); |
122 | } |
104 | } |
123 | |
105 | |
124 | ipv4_ev_watcher.start (ipv4_fd, POLLIN); |
106 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
125 | } |
107 | } |
126 | |
108 | |
127 | udpv4_fd = -1; |
109 | udpv4_fd = -1; |
128 | |
110 | |
129 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
111 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
… | |
… | |
154 | sockinfo si (THISNODE, PROT_UDPv4); |
136 | sockinfo si (THISNODE, PROT_UDPv4); |
155 | |
137 | |
156 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
138 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
157 | { |
139 | { |
158 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
140 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
159 | exit (1); |
141 | exit (EXIT_FAILURE); |
160 | } |
142 | } |
161 | |
143 | |
162 | udpv4_ev_watcher.start (udpv4_fd, POLLIN); |
144 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
163 | } |
145 | } |
164 | |
146 | |
165 | icmpv4_fd = -1; |
147 | icmpv4_fd = -1; |
166 | |
148 | |
167 | #if ENABLE_ICMP |
149 | #if ENABLE_ICMP |
… | |
… | |
198 | sockinfo si (THISNODE, PROT_ICMPv4); |
180 | sockinfo si (THISNODE, PROT_ICMPv4); |
199 | |
181 | |
200 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
182 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
201 | { |
183 | { |
202 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
184 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
203 | exit (1); |
185 | exit (EXIT_FAILURE); |
204 | } |
186 | } |
205 | |
187 | |
206 | icmpv4_ev_watcher.start (icmpv4_fd, POLLIN); |
188 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
207 | } |
189 | } |
208 | #endif |
190 | #endif |
209 | |
191 | |
210 | tcpv4_fd = -1; |
192 | tcpv4_fd = -1; |
211 | |
193 | |
… | |
… | |
228 | sockinfo si (THISNODE, PROT_TCPv4); |
210 | sockinfo si (THISNODE, PROT_TCPv4); |
229 | |
211 | |
230 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
212 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
231 | { |
213 | { |
232 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
214 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
233 | exit (1); |
215 | exit (EXIT_FAILURE); |
234 | } |
216 | } |
235 | |
217 | |
236 | if (listen (tcpv4_fd, 5)) |
218 | if (listen (tcpv4_fd, 5)) |
237 | { |
219 | { |
238 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
220 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
239 | exit (1); |
221 | exit (EXIT_FAILURE); |
|
|
222 | } |
|
|
223 | |
|
|
224 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
|
|
225 | } |
|
|
226 | #endif |
|
|
227 | |
|
|
228 | #if ENABLE_DNS |
|
|
229 | if (THISNODE->protocols & PROT_DNSv4) |
|
|
230 | { |
|
|
231 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
|
|
232 | |
|
|
233 | if (dnsv4_fd < 0) |
|
|
234 | return -1; |
|
|
235 | |
|
|
236 | // standard daemon practise... |
|
|
237 | { |
|
|
238 | int oval = 1; |
|
|
239 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
|
|
240 | } |
|
|
241 | |
|
|
242 | sockinfo si (THISNODE, PROT_DNSv4); |
|
|
243 | |
|
|
244 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
240 | } |
245 | { |
|
|
246 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
|
|
247 | exit (EXIT_FAILURE); |
|
|
248 | } |
241 | |
249 | |
242 | tcpv4_ev_watcher.start (tcpv4_fd, POLLIN); |
250 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
243 | } |
251 | } |
244 | #endif |
252 | #endif |
245 | |
253 | |
246 | tap = new tap_device (); |
254 | tap = new tap_device (); |
247 | if (!tap) //D this, of course, never catches |
255 | if (!tap) //D this, of course, never catches |
248 | { |
256 | { |
249 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
257 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
250 | exit (1); |
258 | exit (EXIT_FAILURE); |
251 | } |
259 | } |
252 | |
260 | |
253 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
261 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
254 | |
262 | |
255 | tap_ev_watcher.start (tap->fd, POLLIN); |
263 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
256 | |
264 | |
257 | reconnect_all (); |
265 | reconnect_all (); |
258 | |
266 | |
259 | return 0; |
267 | return 0; |
260 | } |
268 | } |
… | |
… | |
279 | #if ENABLE_ICMP |
287 | #if ENABLE_ICMP |
280 | case PROT_ICMPv4: |
288 | case PROT_ICMPv4: |
281 | return send_icmpv4_packet (pkt, si, tos); |
289 | return send_icmpv4_packet (pkt, si, tos); |
282 | #endif |
290 | #endif |
283 | |
291 | |
|
|
292 | #if ENABLE_DNS |
|
|
293 | case PROT_DNSv4: |
|
|
294 | return send_dnsv4_packet (pkt, si, tos); |
|
|
295 | #endif |
|
|
296 | |
284 | default: |
297 | default: |
285 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
298 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
286 | return false; |
299 | return false; |
287 | } |
300 | } |
288 | } |
301 | } |
… | |
… | |
320 | |
333 | |
321 | return ~sum; |
334 | return ~sum; |
322 | } |
335 | } |
323 | |
336 | |
324 | #if ENABLE_ICMP |
337 | #if ENABLE_ICMP |
325 | struct icmp_header { |
|
|
326 | u8 type; |
|
|
327 | u8 code; |
|
|
328 | u16 checksum; |
|
|
329 | union { |
|
|
330 | struct { |
|
|
331 | u16 id; |
|
|
332 | u16 sequence; |
|
|
333 | } echo; |
|
|
334 | u32 gateway; |
|
|
335 | struct { |
|
|
336 | u16 unused; |
|
|
337 | u16 mtu; |
|
|
338 | } frag; |
|
|
339 | } un; |
|
|
340 | }; |
|
|
341 | |
|
|
342 | bool |
338 | bool |
343 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
339 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
344 | { |
340 | { |
345 | #if defined(SOL_IP) && defined(IP_TOS) |
341 | #if defined(SOL_IP) && defined(IP_TOS) |
346 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
342 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
… | |
… | |
367 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
363 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
368 | #endif |
364 | #endif |
369 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
365 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
370 | |
366 | |
371 | return true; |
367 | return true; |
|
|
368 | } |
|
|
369 | |
|
|
370 | void |
|
|
371 | vpn::inject_data_packet (tap_packet *pkt, int dst) |
|
|
372 | { |
|
|
373 | if (dst) |
|
|
374 | { |
|
|
375 | // unicast |
|
|
376 | if (dst != THISNODE->id) |
|
|
377 | conns[dst - 1]->inject_data_packet (pkt); |
|
|
378 | } |
|
|
379 | else |
|
|
380 | { |
|
|
381 | // broadcast, this is ugly, but due to the security policy |
|
|
382 | // we have to connect to all hosts... |
|
|
383 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
|
|
384 | if ((*c)->conf != THISNODE) |
|
|
385 | (*c)->inject_data_packet (pkt, true); |
|
|
386 | } |
372 | } |
387 | } |
373 | |
388 | |
374 | void |
389 | void |
375 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
390 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
376 | { |
391 | { |
… | |
… | |
393 | connection *c = conns[src - 1]; |
408 | connection *c = conns[src - 1]; |
394 | |
409 | |
395 | if (dst == 0) |
410 | if (dst == 0) |
396 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
411 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
397 | c->conf->nodename, (const char *)rsi); |
412 | c->conf->nodename, (const char *)rsi); |
398 | else if (dst != 0 && dst != THISNODE->id) |
413 | else if (dst != THISNODE->id) |
399 | { |
414 | { |
400 | if (THISNODE->routerprio) |
415 | if (THISNODE->routerprio) |
401 | // the tos setting gets lost here. who cares. |
416 | // the tos setting gets lost here. who cares. |
402 | conns[dst - 1]->inject_vpn_packet (pkt); |
417 | conns[dst - 1]->inject_vpn_packet (pkt); |
403 | else |
418 | else |
… | |
… | |
412 | } |
427 | } |
413 | |
428 | |
414 | void |
429 | void |
415 | vpn::ipv4_ev (io_watcher &w, short revents) |
430 | vpn::ipv4_ev (io_watcher &w, short revents) |
416 | { |
431 | { |
417 | if (revents & (POLLIN | POLLERR)) |
432 | if (revents & EVENT_READ) |
418 | { |
433 | { |
419 | vpn_packet *pkt = new vpn_packet; |
434 | vpn_packet *pkt = new vpn_packet; |
420 | struct sockaddr_in sa; |
435 | struct sockaddr_in sa; |
421 | socklen_t sa_len = sizeof (sa); |
436 | socklen_t sa_len = sizeof (sa); |
422 | int len; |
437 | int len; |
… | |
… | |
441 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
456 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
442 | } |
457 | } |
443 | |
458 | |
444 | delete pkt; |
459 | delete pkt; |
445 | } |
460 | } |
446 | else if (revents & POLLHUP) |
|
|
447 | { |
|
|
448 | // this cannot ;) happen on udp sockets |
|
|
449 | slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating.")); |
|
|
450 | exit (1); |
|
|
451 | } |
|
|
452 | else |
461 | else |
453 | { |
462 | { |
454 | slog (L_ERR, |
463 | slog (L_ERR, |
455 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
464 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
456 | revents); |
465 | revents); |
457 | exit (1); |
466 | exit (EXIT_FAILURE); |
458 | } |
467 | } |
459 | } |
468 | } |
460 | |
469 | |
461 | #if ENABLE_ICMP |
470 | #if ENABLE_ICMP |
462 | void |
471 | void |
463 | vpn::icmpv4_ev (io_watcher &w, short revents) |
472 | vpn::icmpv4_ev (io_watcher &w, short revents) |
464 | { |
473 | { |
465 | if (revents & (POLLIN | POLLERR)) |
474 | if (revents & EVENT_READ) |
466 | { |
475 | { |
467 | vpn_packet *pkt = new vpn_packet; |
476 | vpn_packet *pkt = new vpn_packet; |
468 | struct sockaddr_in sa; |
477 | struct sockaddr_in sa; |
469 | socklen_t sa_len = sizeof (sa); |
478 | socklen_t sa_len = sizeof (sa); |
470 | int len; |
479 | int len; |
… | |
… | |
495 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
504 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
496 | } |
505 | } |
497 | |
506 | |
498 | delete pkt; |
507 | delete pkt; |
499 | } |
508 | } |
500 | else if (revents & POLLHUP) |
|
|
501 | { |
|
|
502 | // this cannot ;) happen on udp sockets |
|
|
503 | slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating.")); |
|
|
504 | exit (1); |
|
|
505 | } |
|
|
506 | else |
509 | else |
507 | { |
510 | { |
508 | slog (L_ERR, |
511 | slog (L_ERR, |
509 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
512 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
510 | revents); |
513 | revents); |
511 | exit (1); |
514 | exit (EXIT_FAILURE); |
512 | } |
515 | } |
513 | } |
516 | } |
514 | #endif |
517 | #endif |
515 | |
518 | |
516 | void |
519 | void |
517 | vpn::udpv4_ev (io_watcher &w, short revents) |
520 | vpn::udpv4_ev (io_watcher &w, short revents) |
518 | { |
521 | { |
519 | if (revents & (POLLIN | POLLERR)) |
522 | if (revents & EVENT_READ) |
520 | { |
523 | { |
521 | vpn_packet *pkt = new vpn_packet; |
524 | vpn_packet *pkt = new vpn_packet; |
522 | struct sockaddr_in sa; |
525 | struct sockaddr_in sa; |
523 | socklen_t sa_len = sizeof (sa); |
526 | socklen_t sa_len = sizeof (sa); |
524 | int len; |
527 | int len; |
… | |
… | |
539 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
542 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
540 | } |
543 | } |
541 | |
544 | |
542 | delete pkt; |
545 | delete pkt; |
543 | } |
546 | } |
544 | else if (revents & POLLHUP) |
|
|
545 | { |
|
|
546 | // this cannot ;) happen on udp sockets |
|
|
547 | slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating.")); |
|
|
548 | exit (1); |
|
|
549 | } |
|
|
550 | else |
547 | else |
551 | { |
548 | { |
552 | slog (L_ERR, |
549 | slog (L_ERR, |
553 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
550 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
554 | revents); |
551 | revents); |
555 | exit (1); |
552 | exit (EXIT_FAILURE); |
556 | } |
553 | } |
557 | } |
554 | } |
558 | |
555 | |
559 | void |
556 | void |
560 | vpn::tap_ev (io_watcher &w, short revents) |
557 | vpn::tap_ev (io_watcher &w, short revents) |
561 | { |
558 | { |
562 | if (revents & POLLIN) |
559 | if (revents & EVENT_READ) |
563 | { |
560 | { |
564 | /* process data */ |
561 | /* process data */ |
565 | tap_packet *pkt; |
562 | tap_packet *pkt; |
566 | |
563 | |
567 | pkt = tap->recv (); |
564 | pkt = tap->recv (); |
568 | |
565 | |
|
|
566 | if (!pkt) |
|
|
567 | return; |
|
|
568 | |
|
|
569 | if (pkt->len > 14) |
|
|
570 | { |
569 | int dst = mac2id (pkt->dst); |
571 | int dst = mac2id (pkt->dst); |
570 | int src = mac2id (pkt->src); |
572 | int src = mac2id (pkt->src); |
571 | |
573 | |
572 | if (src != THISNODE->id) |
574 | if (src != THISNODE->id) |
573 | { |
|
|
574 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
|
|
575 | exit (1); |
|
|
576 | } |
|
|
577 | |
|
|
578 | if (dst == THISNODE->id) |
|
|
579 | { |
|
|
580 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
|
|
581 | exit (1); |
|
|
582 | } |
|
|
583 | |
|
|
584 | if (dst > conns.size ()) |
|
|
585 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
|
|
586 | else |
|
|
587 | { |
|
|
588 | if (dst) |
|
|
589 | { |
575 | { |
590 | // unicast |
576 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
591 | if (dst != THISNODE->id) |
577 | exit (EXIT_FAILURE); |
592 | conns[dst - 1]->inject_data_packet (pkt); |
|
|
593 | } |
578 | } |
|
|
579 | |
|
|
580 | if (dst == THISNODE->id) |
|
|
581 | { |
|
|
582 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
|
|
583 | exit (EXIT_FAILURE); |
|
|
584 | } |
|
|
585 | |
|
|
586 | if (dst > conns.size ()) |
|
|
587 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
594 | else |
588 | else |
595 | { |
|
|
596 | // broadcast, this is ugly, but due to the security policy |
|
|
597 | // we have to connect to all hosts... |
|
|
598 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
|
|
599 | if ((*c)->conf != THISNODE) |
|
|
600 | (*c)->inject_data_packet (pkt); |
589 | inject_data_packet (pkt, dst); |
601 | } |
|
|
602 | } |
590 | } |
603 | |
591 | |
604 | delete pkt; |
592 | delete pkt; |
605 | } |
|
|
606 | else if (revents & (POLLHUP | POLLERR)) |
|
|
607 | { |
|
|
608 | slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating.")); |
|
|
609 | exit (1); |
|
|
610 | } |
593 | } |
611 | else |
594 | else |
612 | abort (); |
595 | abort (); |
613 | } |
596 | } |
614 | |
597 | |
… | |
… | |
620 | if (events & EVENT_SHUTDOWN) |
603 | if (events & EVENT_SHUTDOWN) |
621 | { |
604 | { |
622 | slog (L_INFO, _("preparing shutdown...")); |
605 | slog (L_INFO, _("preparing shutdown...")); |
623 | |
606 | |
624 | shutdown_all (); |
607 | shutdown_all (); |
625 | |
|
|
626 | remove_pid (pidfilename); |
608 | remove_pid (conf.pidfilename); |
627 | |
|
|
628 | slog (L_INFO, _("terminating")); |
609 | slog (L_INFO, _("terminating")); |
629 | |
610 | exit (EXIT_SUCCESS); |
630 | exit (0); |
|
|
631 | } |
611 | } |
632 | |
612 | |
633 | if (events & EVENT_RECONNECT) |
613 | if (events & EVENT_RECONNECT) |
634 | { |
614 | { |
635 | slog (L_INFO, _("forced reconnect")); |
615 | slog (L_INFO, _("forced reconnect")); |
… | |
… | |
637 | reconnect_all (); |
617 | reconnect_all (); |
638 | } |
618 | } |
639 | |
619 | |
640 | events = 0; |
620 | events = 0; |
641 | } |
621 | } |
642 | |
|
|
643 | w.at = TSTAMP_CANCEL; |
|
|
644 | } |
622 | } |
645 | |
623 | |
646 | void |
624 | void |
647 | vpn::shutdown_all () |
625 | vpn::shutdown_all () |
648 | { |
626 | { |
… | |
… | |
672 | } |
650 | } |
673 | } |
651 | } |
674 | |
652 | |
675 | connection *vpn::find_router () |
653 | connection *vpn::find_router () |
676 | { |
654 | { |
677 | u32 prio = 1; |
655 | u32 prio = 0; |
678 | connection *router = 0; |
656 | connection *router = 0; |
679 | |
657 | |
680 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
658 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
681 | { |
659 | { |
682 | connection *c = *i; |
660 | connection *c = *i; |
… | |
… | |
738 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
716 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
739 | #endif |
717 | #endif |
740 | #if ENABLE_ICMP |
718 | #if ENABLE_ICMP |
741 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
719 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
742 | #endif |
720 | #endif |
|
|
721 | #if ENABLE_DNS |
|
|
722 | , dnsv4_ev_watcher (this, &vpn::dnsv4_ev) |
|
|
723 | #endif |
743 | , tap_ev_watcher (this, &vpn::tap_ev) |
724 | , tap_ev_watcher (this, &vpn::tap_ev) |
744 | { |
725 | { |
745 | } |
726 | } |
746 | |
727 | |
747 | vpn::~vpn () |
728 | vpn::~vpn () |