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) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | |
4 | |
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5 | This file is part of GVPE. |
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6 | |
4 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
5 | it under the terms of the GNU General Public License as published by |
8 | it under the terms of the GNU General Public License as published by |
6 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
10 | (at your option) any later version. |
8 | |
11 | |
9 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
13 | |
16 | |
14 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License |
15 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
16 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | */ |
20 | */ |
18 | |
21 | |
19 | #include "config.h" |
22 | #include "config.h" |
20 | |
23 | |
21 | #include <list> |
24 | #include <list> |
22 | |
25 | |
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26 | #include <cstdio> |
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27 | #include <cstring> |
23 | #include <cstdlib> |
28 | #include <cstdlib> |
24 | #include <cstring> |
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25 | #include <cstdio> |
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26 | |
29 | |
27 | #include <sys/types.h> |
30 | #include <sys/types.h> |
28 | #include <sys/socket.h> |
31 | #include <sys/socket.h> |
29 | #include <sys/poll.h> |
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30 | #include <sys/wait.h> |
32 | #include <sys/wait.h> |
31 | #include <errno.h> |
33 | #include <errno.h> |
32 | #include <time.h> |
34 | #include <time.h> |
33 | #include <unistd.h> |
35 | #include <unistd.h> |
34 | #include <fcntl.h> |
36 | #include <fcntl.h> |
… | |
… | |
40 | |
42 | |
41 | #include "connection.h" |
43 | #include "connection.h" |
42 | #include "util.h" |
44 | #include "util.h" |
43 | #include "vpn.h" |
45 | #include "vpn.h" |
44 | |
46 | |
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47 | vpn network; // THE vpn (bad design...) |
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48 | |
45 | ///////////////////////////////////////////////////////////////////////////// |
49 | ///////////////////////////////////////////////////////////////////////////// |
46 | |
50 | |
47 | const char *vpn::script_if_up () |
51 | const char *vpn::script_if_up () |
48 | { |
52 | { |
49 | // the tunnel device mtu should be the physical mtu - overhead |
53 | // the tunnel device mtu should be the physical mtu - overhead |
… | |
… | |
52 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
56 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
53 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
57 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
54 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
58 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
55 | |
59 | |
56 | char *env; |
60 | char *env; |
57 | asprintf (&env, "CONFBASE=%s", confbase); |
61 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
58 | putenv (env); |
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59 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); |
62 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env); |
60 | putenv (env); |
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61 | asprintf (&env, "NODEID=%d", THISNODE->id); |
63 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
62 | putenv (env); |
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|
63 | asprintf (&env, "IFNAME=%s", tap->interface ()); |
64 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
64 | putenv (env); |
65 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
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66 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
65 | asprintf (&env, "MTU=%d", mtu); |
67 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
66 | putenv (env); |
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67 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
68 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
68 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
69 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
69 | THISNODE->id & 0xff); |
70 | THISNODE->id & 0xff); |
70 | putenv (env); |
71 | putenv (env); |
71 | |
72 | |
… | |
… | |
99 | sockinfo si (THISNODE, PROT_IPv4); |
100 | sockinfo si (THISNODE, PROT_IPv4); |
100 | |
101 | |
101 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
102 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
102 | { |
103 | { |
103 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
104 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
104 | exit (1); |
105 | exit (EXIT_FAILURE); |
105 | } |
106 | } |
106 | |
107 | |
107 | ipv4_ev_watcher.start (ipv4_fd, POLLIN); |
108 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
108 | } |
109 | } |
109 | |
110 | |
110 | udpv4_fd = -1; |
111 | udpv4_fd = -1; |
111 | |
112 | |
112 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
113 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
… | |
… | |
137 | sockinfo si (THISNODE, PROT_UDPv4); |
138 | sockinfo si (THISNODE, PROT_UDPv4); |
138 | |
139 | |
139 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
140 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
140 | { |
141 | { |
141 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
142 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
142 | exit (1); |
143 | exit (EXIT_FAILURE); |
143 | } |
144 | } |
144 | |
145 | |
145 | udpv4_ev_watcher.start (udpv4_fd, POLLIN); |
146 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
146 | } |
147 | } |
147 | |
148 | |
148 | icmpv4_fd = -1; |
149 | icmpv4_fd = -1; |
149 | |
150 | |
150 | #if ENABLE_ICMP |
151 | #if ENABLE_ICMP |
… | |
… | |
181 | sockinfo si (THISNODE, PROT_ICMPv4); |
182 | sockinfo si (THISNODE, PROT_ICMPv4); |
182 | |
183 | |
183 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
184 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
184 | { |
185 | { |
185 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
186 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
186 | exit (1); |
187 | exit (EXIT_FAILURE); |
187 | } |
188 | } |
188 | |
189 | |
189 | icmpv4_ev_watcher.start (icmpv4_fd, POLLIN); |
190 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
190 | } |
191 | } |
191 | #endif |
192 | #endif |
192 | |
193 | |
193 | tcpv4_fd = -1; |
194 | tcpv4_fd = -1; |
194 | |
195 | |
… | |
… | |
211 | sockinfo si (THISNODE, PROT_TCPv4); |
212 | sockinfo si (THISNODE, PROT_TCPv4); |
212 | |
213 | |
213 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
214 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
214 | { |
215 | { |
215 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
216 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
216 | exit (1); |
217 | exit (EXIT_FAILURE); |
217 | } |
218 | } |
218 | |
219 | |
219 | if (listen (tcpv4_fd, 5)) |
220 | if (listen (tcpv4_fd, 5)) |
220 | { |
221 | { |
221 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
222 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
222 | exit (1); |
223 | exit (EXIT_FAILURE); |
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224 | } |
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225 | |
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226 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
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227 | } |
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228 | #endif |
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229 | |
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230 | #if ENABLE_DNS |
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231 | if (THISNODE->protocols & PROT_DNSv4) |
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232 | { |
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233 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
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234 | |
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235 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
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236 | |
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237 | if (dnsv4_fd < 0) |
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238 | return -1; |
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239 | |
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240 | // standard daemon practise... |
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241 | { |
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242 | int oval = 1; |
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243 | setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
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244 | } |
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245 | |
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246 | sockinfo si (THISNODE->dns_hostname, |
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247 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
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248 | PROT_DNSv4); |
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249 | |
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250 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
223 | } |
251 | { |
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252 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
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253 | exit (EXIT_FAILURE); |
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254 | } |
224 | |
255 | |
225 | tcpv4_ev_watcher.start (tcpv4_fd, POLLIN); |
256 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
226 | } |
257 | } |
227 | #endif |
258 | #endif |
228 | |
259 | |
229 | tap = new tap_device (); |
260 | tap = new tap_device (); |
230 | if (!tap) //D this, of course, never catches |
261 | if (!tap) //D this, of course, never catches |
231 | { |
262 | { |
232 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
263 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
233 | exit (1); |
264 | exit (EXIT_FAILURE); |
234 | } |
265 | } |
235 | |
266 | |
236 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
267 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
237 | |
268 | |
238 | tap_ev_watcher.start (tap->fd, POLLIN); |
269 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
239 | |
270 | |
240 | reconnect_all (); |
271 | reconnect_all (); |
241 | |
272 | |
242 | return 0; |
273 | return 0; |
243 | } |
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244 | |
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245 | // send a vpn packet out to other hosts |
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246 | bool |
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247 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
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248 | { |
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249 | switch (si.prot) |
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250 | { |
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251 | case PROT_IPv4: |
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252 | return send_ipv4_packet (pkt, si, tos); |
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253 | |
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254 | case PROT_UDPv4: |
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255 | return send_udpv4_packet (pkt, si, tos); |
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256 | |
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257 | #if ENABLE_TCP |
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258 | case PROT_TCPv4: |
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259 | return send_tcpv4_packet (pkt, si, tos); |
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260 | #endif |
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261 | |
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262 | #if ENABLE_ICMP |
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263 | case PROT_ICMPv4: |
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264 | return send_icmpv4_packet (pkt, si, tos); |
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265 | #endif |
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266 | |
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267 | default: |
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268 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
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269 | return false; |
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270 | } |
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271 | } |
274 | } |
272 | |
275 | |
273 | bool |
276 | bool |
274 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
277 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
275 | { |
278 | { |
… | |
… | |
333 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
336 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
334 | #endif |
337 | #endif |
335 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
338 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
336 | |
339 | |
337 | return true; |
340 | return true; |
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341 | } |
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342 | |
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343 | void |
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344 | vpn::inject_data_packet (tap_packet *pkt, int dst) |
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345 | { |
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346 | if (dst) |
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347 | { |
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348 | // unicast |
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349 | if (dst != THISNODE->id) |
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350 | conns[dst - 1]->inject_data_packet (pkt); |
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351 | } |
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352 | else |
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353 | { |
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354 | // broadcast, this is ugly, but due to the security policy |
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355 | // we have to connect to all hosts... |
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356 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
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357 | if ((*c)->conf != THISNODE) |
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358 | (*c)->inject_data_packet (pkt, true); |
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359 | } |
338 | } |
360 | } |
339 | |
361 | |
340 | void |
362 | void |
341 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
363 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
342 | { |
364 | { |
… | |
… | |
359 | connection *c = conns[src - 1]; |
381 | connection *c = conns[src - 1]; |
360 | |
382 | |
361 | if (dst == 0) |
383 | if (dst == 0) |
362 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
384 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
363 | c->conf->nodename, (const char *)rsi); |
385 | c->conf->nodename, (const char *)rsi); |
364 | else if (dst != 0 && dst != THISNODE->id) |
386 | else if (dst != THISNODE->id) |
365 | { |
387 | { |
366 | if (THISNODE->routerprio) |
388 | if (THISNODE->routerprio) |
367 | // the tos setting gets lost here. who cares. |
389 | // the tos setting gets lost here. who cares. |
368 | conns[dst - 1]->inject_vpn_packet (pkt); |
390 | conns[dst - 1]->inject_vpn_packet (pkt); |
369 | else |
391 | else |
… | |
… | |
375 | else |
397 | else |
376 | c->recv_vpn_packet (pkt, rsi); |
398 | c->recv_vpn_packet (pkt, rsi); |
377 | } |
399 | } |
378 | } |
400 | } |
379 | |
401 | |
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402 | bool |
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403 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
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404 | { |
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405 | switch (si.prot) |
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406 | { |
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407 | case PROT_IPv4: |
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408 | return send_ipv4_packet (pkt, si, tos); |
|
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409 | case PROT_UDPv4: |
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410 | return send_udpv4_packet (pkt, si, tos); |
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411 | #if ENABLE_TCP |
|
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412 | case PROT_TCPv4: |
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413 | return send_tcpv4_packet (pkt, si, tos); |
|
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414 | #endif |
|
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415 | #if ENABLE_ICMP |
|
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416 | case PROT_ICMPv4: |
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417 | return send_icmpv4_packet (pkt, si, tos); |
|
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418 | #endif |
|
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419 | #if ENABLE_DNS |
|
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420 | case PROT_DNSv4: |
|
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421 | return send_dnsv4_packet (pkt, si, tos); |
|
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422 | #endif |
|
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423 | |
|
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424 | default: |
|
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425 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
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426 | } |
|
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427 | |
|
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428 | return false; |
|
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429 | } |
|
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430 | |
380 | void |
431 | void |
381 | vpn::ipv4_ev (io_watcher &w, short revents) |
432 | vpn::ipv4_ev (io_watcher &w, short revents) |
382 | { |
433 | { |
383 | if (revents & (POLLIN | POLLERR)) |
434 | if (revents & EVENT_READ) |
384 | { |
435 | { |
385 | vpn_packet *pkt = new vpn_packet; |
436 | vpn_packet *pkt = new vpn_packet; |
386 | struct sockaddr_in sa; |
437 | struct sockaddr_in sa; |
387 | socklen_t sa_len = sizeof (sa); |
438 | socklen_t sa_len = sizeof (sa); |
388 | int len; |
439 | int len; |
… | |
… | |
393 | |
444 | |
394 | if (len > 0) |
445 | if (len > 0) |
395 | { |
446 | { |
396 | pkt->len = len; |
447 | pkt->len = len; |
397 | |
448 | |
398 | // raw sockets deliver the ipv4, but don't expect it on sends |
449 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
399 | // this is slow, but... |
|
|
400 | pkt->skip_hdr (IP_OVERHEAD); |
450 | pkt->skip_hdr (IP_OVERHEAD); |
401 | |
451 | |
402 | recv_vpn_packet (pkt, si); |
452 | recv_vpn_packet (pkt, si); |
403 | } |
453 | } |
404 | else |
454 | else |
… | |
… | |
407 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
457 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
408 | } |
458 | } |
409 | |
459 | |
410 | delete pkt; |
460 | delete pkt; |
411 | } |
461 | } |
412 | else if (revents & POLLHUP) |
|
|
413 | { |
|
|
414 | // this cannot ;) happen on udp sockets |
|
|
415 | slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating.")); |
|
|
416 | exit (1); |
|
|
417 | } |
|
|
418 | else |
462 | else |
419 | { |
463 | { |
420 | slog (L_ERR, |
464 | slog (L_ERR, |
421 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
465 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
422 | revents); |
466 | revents); |
423 | exit (1); |
467 | exit (EXIT_FAILURE); |
424 | } |
468 | } |
425 | } |
469 | } |
426 | |
470 | |
427 | #if ENABLE_ICMP |
471 | #if ENABLE_ICMP |
428 | void |
472 | void |
429 | vpn::icmpv4_ev (io_watcher &w, short revents) |
473 | vpn::icmpv4_ev (io_watcher &w, short revents) |
430 | { |
474 | { |
431 | if (revents & (POLLIN | POLLERR)) |
475 | if (revents & EVENT_READ) |
432 | { |
476 | { |
433 | vpn_packet *pkt = new vpn_packet; |
477 | vpn_packet *pkt = new vpn_packet; |
434 | struct sockaddr_in sa; |
478 | struct sockaddr_in sa; |
435 | socklen_t sa_len = sizeof (sa); |
479 | socklen_t sa_len = sizeof (sa); |
436 | int len; |
480 | int len; |
… | |
… | |
461 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
505 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
462 | } |
506 | } |
463 | |
507 | |
464 | delete pkt; |
508 | delete pkt; |
465 | } |
509 | } |
466 | else if (revents & POLLHUP) |
|
|
467 | { |
|
|
468 | // this cannot ;) happen on udp sockets |
|
|
469 | slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating.")); |
|
|
470 | exit (1); |
|
|
471 | } |
|
|
472 | else |
510 | else |
473 | { |
511 | { |
474 | slog (L_ERR, |
512 | slog (L_ERR, |
475 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
513 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
476 | revents); |
514 | revents); |
477 | exit (1); |
515 | exit (EXIT_FAILURE); |
478 | } |
516 | } |
479 | } |
517 | } |
480 | #endif |
518 | #endif |
481 | |
519 | |
482 | void |
520 | void |
483 | vpn::udpv4_ev (io_watcher &w, short revents) |
521 | vpn::udpv4_ev (io_watcher &w, short revents) |
484 | { |
522 | { |
485 | if (revents & (POLLIN | POLLERR)) |
523 | if (revents & EVENT_READ) |
486 | { |
524 | { |
487 | vpn_packet *pkt = new vpn_packet; |
525 | vpn_packet *pkt = new vpn_packet; |
488 | struct sockaddr_in sa; |
526 | struct sockaddr_in sa; |
489 | socklen_t sa_len = sizeof (sa); |
527 | socklen_t sa_len = sizeof (sa); |
490 | int len; |
528 | int len; |
… | |
… | |
505 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
543 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
506 | } |
544 | } |
507 | |
545 | |
508 | delete pkt; |
546 | delete pkt; |
509 | } |
547 | } |
510 | else if (revents & POLLHUP) |
|
|
511 | { |
|
|
512 | // this cannot ;) happen on udp sockets |
|
|
513 | slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating.")); |
|
|
514 | exit (1); |
|
|
515 | } |
|
|
516 | else |
548 | else |
517 | { |
549 | { |
518 | slog (L_ERR, |
550 | slog (L_ERR, |
519 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
551 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
520 | revents); |
552 | revents); |
521 | exit (1); |
553 | exit (EXIT_FAILURE); |
522 | } |
554 | } |
523 | } |
555 | } |
524 | |
556 | |
525 | void |
557 | void |
526 | vpn::tap_ev (io_watcher &w, short revents) |
558 | vpn::tap_ev (io_watcher &w, short revents) |
527 | { |
559 | { |
528 | if (revents & POLLIN) |
560 | if (revents & EVENT_READ) |
529 | { |
561 | { |
530 | /* process data */ |
562 | /* process data */ |
531 | tap_packet *pkt; |
563 | tap_packet *pkt; |
532 | |
564 | |
533 | pkt = tap->recv (); |
565 | pkt = tap->recv (); |
534 | |
566 | |
|
|
567 | if (!pkt) |
|
|
568 | return; |
|
|
569 | |
|
|
570 | if (pkt->len > 14) |
|
|
571 | { |
535 | int dst = mac2id (pkt->dst); |
572 | int dst = mac2id (pkt->dst); |
536 | int src = mac2id (pkt->src); |
573 | int src = mac2id (pkt->src); |
537 | |
574 | |
538 | if (src != THISNODE->id) |
575 | if (src != THISNODE->id) |
539 | { |
|
|
540 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
|
|
541 | exit (1); |
|
|
542 | } |
|
|
543 | |
|
|
544 | if (dst == THISNODE->id) |
|
|
545 | { |
|
|
546 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
|
|
547 | exit (1); |
|
|
548 | } |
|
|
549 | |
|
|
550 | if (dst > conns.size ()) |
|
|
551 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
|
|
552 | else |
|
|
553 | { |
|
|
554 | if (dst) |
|
|
555 | { |
576 | { |
556 | // unicast |
577 | slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
557 | if (dst != THISNODE->id) |
578 | exit (EXIT_FAILURE); |
558 | conns[dst - 1]->inject_data_packet (pkt); |
|
|
559 | } |
579 | } |
|
|
580 | |
|
|
581 | if (dst == THISNODE->id) |
|
|
582 | { |
|
|
583 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
|
|
584 | exit (EXIT_FAILURE); |
|
|
585 | } |
|
|
586 | |
|
|
587 | if (dst > conns.size ()) |
|
|
588 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
560 | else |
589 | else |
561 | { |
|
|
562 | // broadcast, this is ugly, but due to the security policy |
|
|
563 | // we have to connect to all hosts... |
|
|
564 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
|
|
565 | if ((*c)->conf != THISNODE) |
|
|
566 | (*c)->inject_data_packet (pkt); |
590 | inject_data_packet (pkt, dst); |
567 | } |
|
|
568 | } |
591 | } |
569 | |
592 | |
570 | delete pkt; |
593 | delete pkt; |
571 | } |
|
|
572 | else if (revents & (POLLHUP | POLLERR)) |
|
|
573 | { |
|
|
574 | slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating.")); |
|
|
575 | exit (1); |
|
|
576 | } |
594 | } |
577 | else |
595 | else |
578 | abort (); |
596 | abort (); |
579 | } |
597 | } |
580 | |
598 | |
… | |
… | |
586 | if (events & EVENT_SHUTDOWN) |
604 | if (events & EVENT_SHUTDOWN) |
587 | { |
605 | { |
588 | slog (L_INFO, _("preparing shutdown...")); |
606 | slog (L_INFO, _("preparing shutdown...")); |
589 | |
607 | |
590 | shutdown_all (); |
608 | shutdown_all (); |
591 | |
|
|
592 | remove_pid (pidfilename); |
609 | remove_pid (conf.pidfilename); |
593 | |
|
|
594 | slog (L_INFO, _("terminating")); |
610 | slog (L_INFO, _("terminating")); |
595 | |
611 | exit (EXIT_SUCCESS); |
596 | exit (0); |
|
|
597 | } |
612 | } |
598 | |
613 | |
599 | if (events & EVENT_RECONNECT) |
614 | if (events & EVENT_RECONNECT) |
600 | { |
615 | { |
601 | slog (L_INFO, _("forced reconnect")); |
616 | slog (L_INFO, _("forced reconnect")); |
… | |
… | |
603 | reconnect_all (); |
618 | reconnect_all (); |
604 | } |
619 | } |
605 | |
620 | |
606 | events = 0; |
621 | events = 0; |
607 | } |
622 | } |
608 | |
|
|
609 | w.at = TSTAMP_CANCEL; |
|
|
610 | } |
623 | } |
611 | |
624 | |
612 | void |
625 | void |
613 | vpn::shutdown_all () |
626 | vpn::shutdown_all () |
614 | { |
627 | { |
… | |
… | |
627 | connection_init (); |
640 | connection_init (); |
628 | |
641 | |
629 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
642 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
630 | i != conf.nodes.end (); ++i) |
643 | i != conf.nodes.end (); ++i) |
631 | { |
644 | { |
632 | connection *conn = new connection (this); |
645 | connection *conn = new connection (this, *i); |
633 | |
|
|
634 | conn->conf = *i; |
|
|
635 | conns.push_back (conn); |
646 | conns.push_back (conn); |
636 | |
|
|
637 | conn->establish_connection (); |
647 | conn->establish_connection (); |
638 | } |
648 | } |
639 | } |
649 | } |
640 | |
650 | |
641 | connection *vpn::find_router () |
651 | connection *vpn::find_router () |
… | |
… | |
704 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
714 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
705 | #endif |
715 | #endif |
706 | #if ENABLE_ICMP |
716 | #if ENABLE_ICMP |
707 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
717 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
708 | #endif |
718 | #endif |
|
|
719 | #if ENABLE_DNS |
|
|
720 | , dnsv4_ev_watcher (this, &vpn::dnsv4_ev) |
|
|
721 | #endif |
709 | , tap_ev_watcher (this, &vpn::tap_ev) |
722 | , tap_ev_watcher (this, &vpn::tap_ev) |
710 | { |
723 | { |
711 | } |
724 | } |
712 | |
725 | |
713 | vpn::~vpn () |
726 | vpn::~vpn () |