1 | /* |
1 | /* |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
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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 | |
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24 | #include <cstdio> |
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25 | #include <cstring> |
23 | #include <cstdlib> |
26 | #include <cstdlib> |
24 | #include <cstring> |
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25 | #include <cstdio> |
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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> |
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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 <arpa/inet.h> |
35 | #include <sys/socket.h> |
36 | #include <netinet/in.h> |
36 | |
37 | #include <netinet/ip_icmp.h> |
37 | #include "netcompat.h" |
38 | |
38 | |
39 | #include "pidfile.h" |
39 | #include "pidfile.h" |
40 | |
40 | |
41 | #include "connection.h" |
41 | #include "connection.h" |
42 | #include "util.h" |
42 | #include "util.h" |
43 | #include "vpn.h" |
43 | #include "vpn.h" |
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44 | |
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45 | vpn network; // THE vpn (bad design...) |
44 | |
46 | |
45 | ///////////////////////////////////////////////////////////////////////////// |
47 | ///////////////////////////////////////////////////////////////////////////// |
46 | |
48 | |
47 | const char *vpn::script_if_up () |
49 | const char *vpn::script_if_up () |
48 | { |
50 | { |
… | |
… | |
52 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
54 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
53 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
55 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
54 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
56 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
55 | |
57 | |
56 | char *env; |
58 | char *env; |
57 | asprintf (&env, "CONFBASE=%s", confbase); |
59 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
58 | putenv (env); |
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59 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); |
60 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env); |
60 | putenv (env); |
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61 | asprintf (&env, "NODEID=%d", THISNODE->id); |
61 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
62 | putenv (env); |
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63 | asprintf (&env, "IFNAME=%s", tap->interface ()); |
62 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
64 | putenv (env); |
63 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
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64 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
65 | asprintf (&env, "MTU=%d", mtu); |
65 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
66 | putenv (env); |
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67 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
66 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
68 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
67 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
69 | THISNODE->id & 0xff); |
68 | THISNODE->id & 0xff); |
70 | putenv (env); |
69 | putenv (env); |
71 | |
70 | |
… | |
… | |
84 | if (ipv4_fd < 0) |
83 | if (ipv4_fd < 0) |
85 | return -1; |
84 | return -1; |
86 | |
85 | |
87 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
86 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
88 | |
87 | |
89 | #ifdef IP_MTU_DISCOVER |
88 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
90 | // this I really consider a linux bug. I am neither connected |
89 | // this I really consider a linux bug. I am neither connected |
91 | // nor do I fragment myself. Linux still sets DF and doesn't |
90 | // nor do I fragment myself. Linux still sets DF and doesn't |
92 | // fragment for me sometimes. |
91 | // fragment for me sometimes. |
93 | { |
92 | { |
94 | int oval = IP_PMTUDISC_DONT; |
93 | int oval = IP_PMTUDISC_DONT; |
… | |
… | |
99 | sockinfo si (THISNODE, PROT_IPv4); |
98 | sockinfo si (THISNODE, PROT_IPv4); |
100 | |
99 | |
101 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
100 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
102 | { |
101 | { |
103 | 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)); |
104 | exit (1); |
103 | exit (EXIT_FAILURE); |
105 | } |
104 | } |
106 | |
105 | |
107 | ipv4_ev_watcher.start (ipv4_fd, POLLIN); |
106 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
108 | } |
107 | } |
109 | |
108 | |
110 | udpv4_fd = -1; |
109 | udpv4_fd = -1; |
111 | |
110 | |
112 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
111 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
… | |
… | |
122 | { |
121 | { |
123 | int oval = 1; |
122 | int oval = 1; |
124 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
123 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
125 | } |
124 | } |
126 | |
125 | |
127 | #ifdef IP_MTU_DISCOVER |
126 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
128 | // this I really consider a linux bug. I am neither connected |
127 | // this I really consider a linux bug. I am neither connected |
129 | // nor do I fragment myself. Linux still sets DF and doesn't |
128 | // nor do I fragment myself. Linux still sets DF and doesn't |
130 | // fragment for me sometimes. |
129 | // fragment for me sometimes. |
131 | { |
130 | { |
132 | int oval = IP_PMTUDISC_DONT; |
131 | int oval = IP_PMTUDISC_DONT; |
… | |
… | |
137 | sockinfo si (THISNODE, PROT_UDPv4); |
136 | sockinfo si (THISNODE, PROT_UDPv4); |
138 | |
137 | |
139 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
138 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
140 | { |
139 | { |
141 | 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)); |
142 | exit (1); |
141 | exit (EXIT_FAILURE); |
143 | } |
142 | } |
144 | |
143 | |
145 | udpv4_ev_watcher.start (udpv4_fd, POLLIN); |
144 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
146 | } |
145 | } |
147 | |
146 | |
148 | icmpv4_fd = -1; |
147 | icmpv4_fd = -1; |
149 | |
148 | |
150 | #if ENABLE_ICMP |
149 | #if ENABLE_ICMP |
… | |
… | |
166 | |
165 | |
167 | setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval); |
166 | setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval); |
168 | } |
167 | } |
169 | #endif |
168 | #endif |
170 | |
169 | |
171 | #ifdef IP_MTU_DISCOVER |
170 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
172 | // this I really consider a linux bug. I am neither connected |
171 | // this I really consider a linux bug. I am neither connected |
173 | // nor do I fragment myself. Linux still sets DF and doesn't |
172 | // nor do I fragment myself. Linux still sets DF and doesn't |
174 | // fragment for me sometimes. |
173 | // fragment for me sometimes. |
175 | { |
174 | { |
176 | int oval = IP_PMTUDISC_DONT; |
175 | int oval = IP_PMTUDISC_DONT; |
… | |
… | |
181 | sockinfo si (THISNODE, PROT_ICMPv4); |
180 | sockinfo si (THISNODE, PROT_ICMPv4); |
182 | |
181 | |
183 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
182 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
184 | { |
183 | { |
185 | 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)); |
186 | exit (1); |
185 | exit (EXIT_FAILURE); |
187 | } |
186 | } |
188 | |
187 | |
189 | icmpv4_ev_watcher.start (icmpv4_fd, POLLIN); |
188 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
190 | } |
189 | } |
191 | #endif |
190 | #endif |
192 | |
191 | |
193 | tcpv4_fd = -1; |
192 | tcpv4_fd = -1; |
194 | |
193 | |
… | |
… | |
211 | sockinfo si (THISNODE, PROT_TCPv4); |
210 | sockinfo si (THISNODE, PROT_TCPv4); |
212 | |
211 | |
213 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
212 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
214 | { |
213 | { |
215 | 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)); |
216 | exit (1); |
215 | exit (EXIT_FAILURE); |
217 | } |
216 | } |
218 | |
217 | |
219 | if (listen (tcpv4_fd, 5)) |
218 | if (listen (tcpv4_fd, 5)) |
220 | { |
219 | { |
221 | 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)); |
222 | exit (1); |
221 | exit (EXIT_FAILURE); |
223 | } |
222 | } |
224 | |
223 | |
225 | tcpv4_ev_watcher.start (tcpv4_fd, POLLIN); |
224 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
226 | } |
225 | } |
227 | #endif |
226 | #endif |
228 | |
227 | |
229 | tap = new tap_device (); |
228 | tap = new tap_device (); |
230 | if (!tap) //D this, of course, never catches |
229 | if (!tap) //D this, of course, never catches |
231 | { |
230 | { |
232 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
231 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
233 | exit (1); |
232 | exit (EXIT_FAILURE); |
234 | } |
233 | } |
235 | |
234 | |
236 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
235 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
237 | |
236 | |
238 | tap_ev_watcher.start (tap->fd, POLLIN); |
237 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
239 | |
238 | |
240 | reconnect_all (); |
239 | reconnect_all (); |
241 | |
240 | |
242 | return 0; |
241 | return 0; |
243 | } |
242 | } |
… | |
… | |
271 | } |
270 | } |
272 | |
271 | |
273 | bool |
272 | bool |
274 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
273 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
275 | { |
274 | { |
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275 | #if defined(SOL_IP) && defined(IP_TOS) |
276 | setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
276 | setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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277 | #endif |
277 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
278 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
278 | |
279 | |
279 | return true; |
280 | return true; |
280 | } |
281 | } |
281 | |
282 | |
… | |
… | |
304 | |
305 | |
305 | #if ENABLE_ICMP |
306 | #if ENABLE_ICMP |
306 | bool |
307 | bool |
307 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
308 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
308 | { |
309 | { |
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310 | #if defined(SOL_IP) && defined(IP_TOS) |
309 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
311 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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312 | #endif |
310 | |
313 | |
311 | pkt->unshift_hdr (4); |
314 | pkt->unshift_hdr (4); |
312 | |
315 | |
313 | icmphdr *hdr = (icmphdr *)&((*pkt)[0]); |
316 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
314 | hdr->type = ::conf.icmp_type; |
317 | hdr->type = ::conf.icmp_type; |
315 | hdr->code = 255; |
318 | hdr->code = 255; |
316 | hdr->checksum = 0; |
319 | hdr->checksum = 0; |
317 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
320 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
318 | |
321 | |
… | |
… | |
323 | #endif |
326 | #endif |
324 | |
327 | |
325 | bool |
328 | bool |
326 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
329 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
327 | { |
330 | { |
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331 | #if defined(SOL_IP) && defined(IP_TOS) |
328 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
332 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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333 | #endif |
329 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
334 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
330 | |
335 | |
331 | return true; |
336 | return true; |
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337 | } |
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338 | |
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339 | void |
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340 | vpn::inject_data_packet (tap_packet *pkt, int dst) |
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341 | { |
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342 | if (dst) |
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343 | { |
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344 | // unicast |
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345 | if (dst != THISNODE->id) |
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346 | conns[dst - 1]->inject_data_packet (pkt); |
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347 | } |
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348 | else |
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349 | { |
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350 | // broadcast, this is ugly, but due to the security policy |
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351 | // we have to connect to all hosts... |
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352 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
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353 | if ((*c)->conf != THISNODE) |
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354 | (*c)->inject_data_packet (pkt, true); |
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355 | } |
332 | } |
356 | } |
333 | |
357 | |
334 | void |
358 | void |
335 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
359 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
336 | { |
360 | { |
… | |
… | |
353 | connection *c = conns[src - 1]; |
377 | connection *c = conns[src - 1]; |
354 | |
378 | |
355 | if (dst == 0) |
379 | if (dst == 0) |
356 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
380 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
357 | c->conf->nodename, (const char *)rsi); |
381 | c->conf->nodename, (const char *)rsi); |
358 | else if (dst != 0 && dst != THISNODE->id) |
382 | else if (dst != THISNODE->id) |
359 | { |
383 | { |
360 | if (THISNODE->routerprio) |
384 | if (THISNODE->routerprio) |
361 | // the tos setting gets lost here. who cares. |
385 | // the tos setting gets lost here. who cares. |
362 | conns[dst - 1]->inject_vpn_packet (pkt); |
386 | conns[dst - 1]->inject_vpn_packet (pkt); |
363 | else |
387 | else |
… | |
… | |
372 | } |
396 | } |
373 | |
397 | |
374 | void |
398 | void |
375 | vpn::ipv4_ev (io_watcher &w, short revents) |
399 | vpn::ipv4_ev (io_watcher &w, short revents) |
376 | { |
400 | { |
377 | if (revents & (POLLIN | POLLERR)) |
401 | if (revents & EVENT_READ) |
378 | { |
402 | { |
379 | vpn_packet *pkt = new vpn_packet; |
403 | vpn_packet *pkt = new vpn_packet; |
380 | struct sockaddr_in sa; |
404 | struct sockaddr_in sa; |
381 | socklen_t sa_len = sizeof (sa); |
405 | socklen_t sa_len = sizeof (sa); |
382 | int len; |
406 | int len; |
… | |
… | |
401 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
425 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
402 | } |
426 | } |
403 | |
427 | |
404 | delete pkt; |
428 | delete pkt; |
405 | } |
429 | } |
406 | else if (revents & POLLHUP) |
|
|
407 | { |
|
|
408 | // this cannot ;) happen on udp sockets |
|
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409 | slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating.")); |
|
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410 | exit (1); |
|
|
411 | } |
|
|
412 | else |
430 | else |
413 | { |
431 | { |
414 | slog (L_ERR, |
432 | slog (L_ERR, |
415 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
433 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
416 | revents); |
434 | revents); |
417 | exit (1); |
435 | exit (EXIT_FAILURE); |
418 | } |
436 | } |
419 | } |
437 | } |
420 | |
438 | |
421 | #if ENABLE_ICMP |
439 | #if ENABLE_ICMP |
422 | void |
440 | void |
423 | vpn::icmpv4_ev (io_watcher &w, short revents) |
441 | vpn::icmpv4_ev (io_watcher &w, short revents) |
424 | { |
442 | { |
425 | if (revents & (POLLIN | POLLERR)) |
443 | if (revents & EVENT_READ) |
426 | { |
444 | { |
427 | vpn_packet *pkt = new vpn_packet; |
445 | vpn_packet *pkt = new vpn_packet; |
428 | struct sockaddr_in sa; |
446 | struct sockaddr_in sa; |
429 | socklen_t sa_len = sizeof (sa); |
447 | socklen_t sa_len = sizeof (sa); |
430 | int len; |
448 | int len; |
… | |
… | |
435 | |
453 | |
436 | if (len > 0) |
454 | if (len > 0) |
437 | { |
455 | { |
438 | pkt->len = len; |
456 | pkt->len = len; |
439 | |
457 | |
440 | icmphdr *hdr = (icmphdr *)&((*pkt)[IP_OVERHEAD]); |
458 | icmp_header *hdr = (icmp_header *)&((*pkt)[IP_OVERHEAD]); |
441 | |
459 | |
442 | if (hdr->type == ::conf.icmp_type |
460 | if (hdr->type == ::conf.icmp_type |
443 | && hdr->code == 255) |
461 | && hdr->code == 255) |
444 | { |
462 | { |
445 | // raw sockets deliver the ipv4, but don't expect it on sends |
463 | // raw sockets deliver the ipv4, but don't expect it on sends |
… | |
… | |
455 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
473 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
456 | } |
474 | } |
457 | |
475 | |
458 | delete pkt; |
476 | delete pkt; |
459 | } |
477 | } |
460 | else if (revents & POLLHUP) |
|
|
461 | { |
|
|
462 | // this cannot ;) happen on udp sockets |
|
|
463 | slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating.")); |
|
|
464 | exit (1); |
|
|
465 | } |
|
|
466 | else |
478 | else |
467 | { |
479 | { |
468 | slog (L_ERR, |
480 | slog (L_ERR, |
469 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
481 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
470 | revents); |
482 | revents); |
471 | exit (1); |
483 | exit (EXIT_FAILURE); |
472 | } |
484 | } |
473 | } |
485 | } |
474 | #endif |
486 | #endif |
475 | |
487 | |
476 | void |
488 | void |
477 | vpn::udpv4_ev (io_watcher &w, short revents) |
489 | vpn::udpv4_ev (io_watcher &w, short revents) |
478 | { |
490 | { |
479 | if (revents & (POLLIN | POLLERR)) |
491 | if (revents & EVENT_READ) |
480 | { |
492 | { |
481 | vpn_packet *pkt = new vpn_packet; |
493 | vpn_packet *pkt = new vpn_packet; |
482 | struct sockaddr_in sa; |
494 | struct sockaddr_in sa; |
483 | socklen_t sa_len = sizeof (sa); |
495 | socklen_t sa_len = sizeof (sa); |
484 | int len; |
496 | int len; |
… | |
… | |
499 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
511 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
500 | } |
512 | } |
501 | |
513 | |
502 | delete pkt; |
514 | delete pkt; |
503 | } |
515 | } |
504 | else if (revents & POLLHUP) |
|
|
505 | { |
|
|
506 | // this cannot ;) happen on udp sockets |
|
|
507 | slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating.")); |
|
|
508 | exit (1); |
|
|
509 | } |
|
|
510 | else |
516 | else |
511 | { |
517 | { |
512 | slog (L_ERR, |
518 | slog (L_ERR, |
513 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
519 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
514 | revents); |
520 | revents); |
515 | exit (1); |
521 | exit (EXIT_FAILURE); |
516 | } |
522 | } |
517 | } |
523 | } |
518 | |
524 | |
519 | void |
525 | void |
520 | vpn::tap_ev (io_watcher &w, short revents) |
526 | vpn::tap_ev (io_watcher &w, short revents) |
521 | { |
527 | { |
522 | if (revents & POLLIN) |
528 | if (revents & EVENT_READ) |
523 | { |
529 | { |
524 | /* process data */ |
530 | /* process data */ |
525 | tap_packet *pkt; |
531 | tap_packet *pkt; |
526 | |
532 | |
527 | pkt = tap->recv (); |
533 | pkt = tap->recv (); |
528 | |
534 | |
|
|
535 | if (!pkt) |
|
|
536 | return; |
|
|
537 | |
|
|
538 | if (pkt->len > 14) |
|
|
539 | { |
529 | int dst = mac2id (pkt->dst); |
540 | int dst = mac2id (pkt->dst); |
530 | int src = mac2id (pkt->src); |
541 | int src = mac2id (pkt->src); |
531 | |
542 | |
532 | if (src != THISNODE->id) |
543 | if (src != THISNODE->id) |
533 | { |
|
|
534 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating.")); |
|
|
535 | exit (1); |
|
|
536 | } |
|
|
537 | |
|
|
538 | if (dst == THISNODE->id) |
|
|
539 | { |
|
|
540 | slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating.")); |
|
|
541 | exit (1); |
|
|
542 | } |
|
|
543 | |
|
|
544 | if (dst > conns.size ()) |
|
|
545 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
|
|
546 | else |
|
|
547 | { |
|
|
548 | if (dst) |
|
|
549 | { |
544 | { |
550 | // unicast |
545 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
551 | if (dst != THISNODE->id) |
546 | exit (EXIT_FAILURE); |
552 | conns[dst - 1]->inject_data_packet (pkt); |
|
|
553 | } |
547 | } |
|
|
548 | |
|
|
549 | if (dst == THISNODE->id) |
|
|
550 | { |
|
|
551 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
|
|
552 | exit (EXIT_FAILURE); |
|
|
553 | } |
|
|
554 | |
|
|
555 | if (dst > conns.size ()) |
|
|
556 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
554 | else |
557 | else |
555 | { |
|
|
556 | // broadcast, this is ugly, but due to the security policy |
|
|
557 | // we have to connect to all hosts... |
|
|
558 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
|
|
559 | if ((*c)->conf != THISNODE) |
|
|
560 | (*c)->inject_data_packet (pkt); |
558 | inject_data_packet (pkt, dst); |
561 | } |
|
|
562 | } |
559 | } |
563 | |
560 | |
564 | delete pkt; |
561 | delete pkt; |
565 | } |
|
|
566 | else if (revents & (POLLHUP | POLLERR)) |
|
|
567 | { |
|
|
568 | slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating.")); |
|
|
569 | exit (1); |
|
|
570 | } |
562 | } |
571 | else |
563 | else |
572 | abort (); |
564 | abort (); |
573 | } |
565 | } |
574 | |
566 | |
… | |
… | |
580 | if (events & EVENT_SHUTDOWN) |
572 | if (events & EVENT_SHUTDOWN) |
581 | { |
573 | { |
582 | slog (L_INFO, _("preparing shutdown...")); |
574 | slog (L_INFO, _("preparing shutdown...")); |
583 | |
575 | |
584 | shutdown_all (); |
576 | shutdown_all (); |
585 | |
|
|
586 | remove_pid (pidfilename); |
577 | remove_pid (pidfilename); |
587 | |
|
|
588 | slog (L_INFO, _("terminating")); |
578 | slog (L_INFO, _("terminating")); |
589 | |
579 | exit (EXIT_SUCCESS); |
590 | exit (0); |
|
|
591 | } |
580 | } |
592 | |
581 | |
593 | if (events & EVENT_RECONNECT) |
582 | if (events & EVENT_RECONNECT) |
594 | { |
583 | { |
595 | slog (L_INFO, _("forced reconnect")); |
584 | slog (L_INFO, _("forced reconnect")); |
… | |
… | |
597 | reconnect_all (); |
586 | reconnect_all (); |
598 | } |
587 | } |
599 | |
588 | |
600 | events = 0; |
589 | events = 0; |
601 | } |
590 | } |
602 | |
|
|
603 | w.at = TSTAMP_CANCEL; |
|
|
604 | } |
591 | } |
605 | |
592 | |
606 | void |
593 | void |
607 | vpn::shutdown_all () |
594 | vpn::shutdown_all () |
608 | { |
595 | { |