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 | Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
|
|
5 | This file is part of GVPE. |
|
|
6 | |
5 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify it |
6 | it under the terms of the GNU General Public License as published by |
8 | under the terms of the GNU General Public License as published by the |
7 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
8 | (at your option) any later version. |
10 | option) any later version. |
9 | |
11 | |
10 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, but |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
13 | GNU General Public License for more details. |
15 | Public License for more details. |
14 | |
16 | |
15 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License along |
16 | along with this program; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | |
|
|
20 | Additional permission under GNU GPL version 3 section 7 |
|
|
21 | |
|
|
22 | If you modify this Program, or any covered work, by linking or |
|
|
23 | combining it with the OpenSSL project's OpenSSL library (or a modified |
|
|
24 | version of that library), containing parts covered by the terms of the |
|
|
25 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
|
|
26 | additional permission to convey the resulting work. Corresponding |
|
|
27 | Source for a non-source form of such a combination shall include the |
|
|
28 | source code for the parts of OpenSSL used as well as that of the |
|
|
29 | covered work. |
18 | */ |
30 | */ |
19 | |
31 | |
20 | #include "config.h" |
32 | #include "config.h" |
21 | |
33 | |
22 | #include <list> |
34 | #include <list> |
… | |
… | |
44 | |
56 | |
45 | vpn network; // THE vpn (bad design...) |
57 | vpn network; // THE vpn (bad design...) |
46 | |
58 | |
47 | ///////////////////////////////////////////////////////////////////////////// |
59 | ///////////////////////////////////////////////////////////////////////////// |
48 | |
60 | |
49 | const char *vpn::script_if_up () |
61 | static void inline |
|
|
62 | set_tos (int fd, int &tos_prev, int tos) |
|
|
63 | { |
|
|
64 | #if defined(SOL_IP) && defined(IP_TOS) |
|
|
65 | if (tos_prev == tos) |
|
|
66 | return; |
|
|
67 | |
|
|
68 | tos_prev = tos; |
|
|
69 | setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
70 | #endif |
|
|
71 | } |
|
|
72 | |
|
|
73 | void |
|
|
74 | vpn::script_init_env () |
50 | { |
75 | { |
51 | // the tunnel device mtu should be the physical mtu - overhead |
76 | // the tunnel device mtu should be the physical mtu - overhead |
52 | // the tricky part is rounding to the cipher key blocksize |
77 | // the tricky part is rounding to the cipher key blocksize |
53 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
78 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
54 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
79 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
55 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
80 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
56 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
81 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
57 | |
82 | |
58 | char *env; |
83 | char *env; |
59 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
84 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
60 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env); |
|
|
61 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
|
|
62 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
85 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
63 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
86 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
64 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
87 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
65 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
88 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
66 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
89 | asprintf (&env, "NODES=%d", conns.size ()); putenv (env); |
67 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
90 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
68 | THISNODE->id & 0xff); |
|
|
69 | putenv (env); |
|
|
70 | |
91 | |
|
|
92 | conns [THISNODE->id - 1]->script_init_env (""); |
|
|
93 | |
|
|
94 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
|
|
95 | { |
|
|
96 | char ext[16]; |
|
|
97 | snprintf (ext, 16, "_%d", (*c)->conf->id); |
|
|
98 | (*c)->script_init_env (ext); |
|
|
99 | } |
|
|
100 | } |
|
|
101 | |
|
|
102 | inline const char * |
|
|
103 | vpn::script_if_init () |
|
|
104 | { |
|
|
105 | script_init_env (); |
|
|
106 | |
|
|
107 | return tap->if_up (); |
|
|
108 | } |
|
|
109 | |
|
|
110 | inline const char * |
|
|
111 | vpn::script_if_up () |
|
|
112 | { |
|
|
113 | script_init_env (); |
|
|
114 | |
|
|
115 | char *filename; |
|
|
116 | asprintf (&filename, |
|
|
117 | "%s/%s", |
|
|
118 | confbase, |
71 | return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; |
119 | ::conf.script_if_up ? ::conf.script_if_up : "if-up"); |
|
|
120 | |
|
|
121 | return filename; |
|
|
122 | } |
|
|
123 | |
|
|
124 | int |
|
|
125 | vpn::setup_socket (u8 prot, int family, int type, int proto) |
|
|
126 | { |
|
|
127 | int fd = socket (family, type, proto); |
|
|
128 | |
|
|
129 | if (fd < 0) |
|
|
130 | { |
|
|
131 | slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno)); |
|
|
132 | return fd; |
|
|
133 | } |
|
|
134 | |
|
|
135 | fcntl (fd, F_SETFL, O_NONBLOCK); |
|
|
136 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
|
|
137 | |
|
|
138 | #ifdef SO_MARK |
|
|
139 | if (::conf.nfmark) |
|
|
140 | setsockopt (ipv4_fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark); |
|
|
141 | #endif |
|
|
142 | |
|
|
143 | return fd; |
72 | } |
144 | } |
73 | |
145 | |
74 | int |
146 | int |
75 | vpn::setup () |
147 | vpn::setup () |
76 | { |
148 | { |
|
|
149 | int success = 0; |
|
|
150 | |
|
|
151 | ipv4_tos = -1; |
77 | ipv4_fd = -1; |
152 | ipv4_fd = -1; |
78 | |
153 | |
79 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
154 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
80 | { |
155 | { |
81 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
156 | ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto); |
82 | |
157 | |
83 | if (ipv4_fd < 0) |
158 | if (ipv4_fd < 0) |
84 | return -1; |
159 | return -1; |
85 | |
|
|
86 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
|
|
87 | |
160 | |
88 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
161 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
89 | // this I really consider a linux bug. I am neither connected |
162 | // this I really consider a linux bug. I am neither connected |
90 | // nor do I fragment myself. Linux still sets DF and doesn't |
163 | // nor do I fragment myself. Linux still sets DF and doesn't |
91 | // fragment for me sometimes. |
164 | // fragment for me sometimes. |
… | |
… | |
97 | |
170 | |
98 | sockinfo si (THISNODE, PROT_IPv4); |
171 | sockinfo si (THISNODE, PROT_IPv4); |
99 | |
172 | |
100 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
173 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
101 | { |
174 | { |
102 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
175 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
103 | exit (EXIT_FAILURE); |
176 | return -1; |
104 | } |
177 | } |
105 | |
178 | |
106 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
179 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
|
|
180 | ++success; |
107 | } |
181 | } |
|
|
182 | else |
|
|
183 | THISNODE->protocols &= ~PROT_IPv4; |
108 | |
184 | |
|
|
185 | udpv4_tos = -1; |
109 | udpv4_fd = -1; |
186 | udpv4_fd = -1; |
110 | |
187 | |
111 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
188 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
112 | { |
189 | { |
113 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
190 | udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
114 | |
191 | |
115 | if (udpv4_fd < 0) |
192 | if (udpv4_fd < 0) |
116 | return -1; |
193 | return -1; |
117 | |
|
|
118 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
119 | |
194 | |
120 | // standard daemon practise... |
195 | // standard daemon practise... |
121 | { |
196 | { |
122 | int oval = 1; |
197 | int oval = 1; |
123 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
198 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
135 | |
210 | |
136 | sockinfo si (THISNODE, PROT_UDPv4); |
211 | sockinfo si (THISNODE, PROT_UDPv4); |
137 | |
212 | |
138 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
213 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
139 | { |
214 | { |
140 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
215 | slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
141 | exit (EXIT_FAILURE); |
216 | return -1; |
142 | } |
217 | } |
143 | |
218 | |
144 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
219 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
|
|
220 | ++success; |
145 | } |
221 | } |
|
|
222 | else |
|
|
223 | THISNODE->protocols &= ~PROT_UDPv4; |
146 | |
224 | |
|
|
225 | icmpv4_tos = -1; |
147 | icmpv4_fd = -1; |
226 | icmpv4_fd = -1; |
148 | |
227 | |
149 | #if ENABLE_ICMP |
228 | #if ENABLE_ICMP |
150 | if (THISNODE->protocols & PROT_ICMPv4) |
229 | if (THISNODE->protocols & PROT_ICMPv4) |
151 | { |
230 | { |
152 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
231 | icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP); |
153 | |
232 | |
154 | if (icmpv4_fd < 0) |
233 | if (icmpv4_fd < 0) |
155 | return -1; |
234 | return -1; |
156 | |
|
|
157 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
158 | |
235 | |
159 | #ifdef ICMP_FILTER |
236 | #ifdef ICMP_FILTER |
160 | { |
237 | { |
161 | icmp_filter oval; |
238 | icmp_filter oval; |
162 | oval.data = 0xffffffff; |
239 | oval.data = 0xffffffff; |
… | |
… | |
171 | // this I really consider a linux bug. I am neither connected |
248 | // this I really consider a linux bug. I am neither connected |
172 | // nor do I fragment myself. Linux still sets DF and doesn't |
249 | // nor do I fragment myself. Linux still sets DF and doesn't |
173 | // fragment for me sometimes. |
250 | // fragment for me sometimes. |
174 | { |
251 | { |
175 | int oval = IP_PMTUDISC_DONT; |
252 | int oval = IP_PMTUDISC_DONT; |
176 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
253 | setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
177 | } |
254 | } |
178 | #endif |
255 | #endif |
179 | |
256 | |
180 | sockinfo si (THISNODE, PROT_ICMPv4); |
257 | sockinfo si (THISNODE, PROT_ICMPv4); |
181 | |
258 | |
182 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
259 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
183 | { |
260 | { |
184 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
261 | slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
185 | exit (EXIT_FAILURE); |
262 | return -1; |
186 | } |
263 | } |
187 | |
264 | |
188 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
265 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
|
|
266 | ++success; |
189 | } |
267 | } |
190 | #endif |
268 | #endif |
191 | |
269 | |
192 | tcpv4_fd = -1; |
270 | tcpv4_fd = -1; |
193 | |
271 | |
194 | #if ENABLE_TCP |
272 | #if ENABLE_TCP |
195 | if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port) |
273 | if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port) |
196 | { |
274 | { |
197 | tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); |
275 | tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP); |
198 | |
276 | |
199 | if (tcpv4_fd < 0) |
277 | if (tcpv4_fd < 0) |
200 | return -1; |
278 | return -1; |
201 | |
279 | |
202 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
203 | |
|
|
204 | // standard daemon practise... |
280 | // standard daemon practise... |
205 | { |
281 | { |
206 | int oval = 1; |
282 | int oval = 1; |
207 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
283 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
208 | } |
284 | } |
209 | |
285 | |
210 | sockinfo si (THISNODE, PROT_TCPv4); |
286 | sockinfo si (THISNODE, PROT_TCPv4); |
211 | |
287 | |
212 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
288 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
213 | { |
289 | { |
214 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
290 | slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
215 | exit (EXIT_FAILURE); |
291 | return -1; |
216 | } |
292 | } |
217 | |
293 | |
218 | if (listen (tcpv4_fd, 5)) |
294 | if (listen (tcpv4_fd, 5)) |
219 | { |
295 | { |
220 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
296 | slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
221 | exit (EXIT_FAILURE); |
297 | return -1; |
222 | } |
298 | } |
223 | |
299 | |
224 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
300 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
|
|
301 | ++success; |
225 | } |
302 | } |
|
|
303 | else |
|
|
304 | THISNODE->protocols &= ~PROT_TCPv4; |
226 | #endif |
305 | #endif |
|
|
306 | |
|
|
307 | dnsv4_tos = -1; |
|
|
308 | dnsv4_fd = -1; |
227 | |
309 | |
228 | #if ENABLE_DNS |
310 | #if ENABLE_DNS |
229 | if (THISNODE->protocols & PROT_DNSv4) |
311 | if (THISNODE->protocols & PROT_DNSv4) |
230 | { |
312 | { |
|
|
313 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
|
|
314 | |
231 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
315 | dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
232 | |
316 | |
233 | if (dnsv4_fd < 0) |
317 | if (dnsv4_fd < 0) |
234 | return -1; |
318 | return -1; |
235 | |
319 | |
|
|
320 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
|
|
321 | // this I really consider a linux bug. I am neither connected |
|
|
322 | // nor do I fragment myself. Linux still sets DF and doesn't |
|
|
323 | // fragment for me sometimes. |
|
|
324 | { |
|
|
325 | int oval = IP_PMTUDISC_DONT; |
|
|
326 | setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
|
|
327 | } |
|
|
328 | # endif |
|
|
329 | |
236 | // standard daemon practise... |
330 | // standard daemon practise... |
237 | { |
331 | { |
238 | int oval = 1; |
332 | int oval = 1; |
239 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
333 | setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
240 | } |
334 | } |
241 | |
335 | |
242 | sockinfo si (THISNODE, PROT_DNSv4); |
336 | sockinfo si (THISNODE->dns_hostname, |
|
|
337 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
|
|
338 | PROT_DNSv4); |
243 | |
339 | |
244 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
340 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
245 | { |
341 | { |
246 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
342 | slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
247 | exit (EXIT_FAILURE); |
343 | return -1; |
248 | } |
344 | } |
249 | |
345 | |
250 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
346 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
|
|
347 | ++success; |
|
|
348 | } |
|
|
349 | #endif |
|
|
350 | |
|
|
351 | ///////////////////////////////////////////////////////////////////////////// |
|
|
352 | |
|
|
353 | if (!success) |
251 | } |
354 | { |
252 | #endif |
355 | slog (L_ERR, _("no protocols enabled.")); |
|
|
356 | return -1; |
|
|
357 | } |
|
|
358 | |
|
|
359 | reconnect_all (); |
|
|
360 | |
|
|
361 | ///////////////////////////////////////////////////////////////////////////// |
253 | |
362 | |
254 | tap = new tap_device (); |
363 | tap = new tap_device (); |
255 | if (!tap) //D this, of course, never catches |
364 | if (!tap) //D this, of course, never catches |
256 | { |
365 | { |
257 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
366 | slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname); |
258 | exit (EXIT_FAILURE); |
367 | return -1; |
259 | } |
368 | } |
260 | |
369 | |
261 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
370 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
262 | |
371 | |
|
|
372 | run_script_cb cb; |
|
|
373 | cb.set<vpn, &vpn::script_if_init> (this); |
|
|
374 | |
|
|
375 | if (tap->if_up () && |
|
|
376 | !run_script (cb, true)) |
|
|
377 | { |
|
|
378 | slog (L_ERR, _("interface initialization command '%s' failed."), |
|
|
379 | tap->if_up ()); |
|
|
380 | return -1; |
|
|
381 | } |
|
|
382 | |
|
|
383 | cb.set<vpn, &vpn::script_if_up> (this); |
|
|
384 | if (!run_script (cb, true)) |
|
|
385 | { |
|
|
386 | slog (L_ERR, _("if-up command execution failed.")); |
|
|
387 | return -1; |
|
|
388 | } |
|
|
389 | |
263 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
390 | tap_ev_watcher.start (tap->fd, EV_READ); |
264 | |
|
|
265 | reconnect_all (); |
|
|
266 | |
391 | |
267 | return 0; |
392 | return 0; |
268 | } |
|
|
269 | |
|
|
270 | // send a vpn packet out to other hosts |
|
|
271 | bool |
|
|
272 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
273 | { |
|
|
274 | switch (si.prot) |
|
|
275 | { |
|
|
276 | case PROT_IPv4: |
|
|
277 | return send_ipv4_packet (pkt, si, tos); |
|
|
278 | |
|
|
279 | case PROT_UDPv4: |
|
|
280 | return send_udpv4_packet (pkt, si, tos); |
|
|
281 | |
|
|
282 | #if ENABLE_TCP |
|
|
283 | case PROT_TCPv4: |
|
|
284 | return send_tcpv4_packet (pkt, si, tos); |
|
|
285 | #endif |
|
|
286 | |
|
|
287 | #if ENABLE_ICMP |
|
|
288 | case PROT_ICMPv4: |
|
|
289 | return send_icmpv4_packet (pkt, si, tos); |
|
|
290 | #endif |
|
|
291 | |
|
|
292 | #if ENABLE_DNS |
|
|
293 | case PROT_DNSv4: |
|
|
294 | return send_dnsv4_packet (pkt, si, tos); |
|
|
295 | #endif |
|
|
296 | |
|
|
297 | default: |
|
|
298 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
299 | return false; |
|
|
300 | } |
|
|
301 | } |
393 | } |
302 | |
394 | |
303 | bool |
395 | bool |
304 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
396 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
305 | { |
397 | { |
306 | #if defined(SOL_IP) && defined(IP_TOS) |
398 | set_tos (ipv4_fd, ipv4_tos, tos); |
307 | setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
308 | #endif |
|
|
309 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
399 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
310 | |
400 | |
311 | return true; |
401 | return true; |
312 | } |
402 | } |
313 | |
403 | |
… | |
… | |
336 | |
426 | |
337 | #if ENABLE_ICMP |
427 | #if ENABLE_ICMP |
338 | bool |
428 | bool |
339 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
429 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
340 | { |
430 | { |
341 | #if defined(SOL_IP) && defined(IP_TOS) |
|
|
342 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
343 | #endif |
|
|
344 | |
|
|
345 | pkt->unshift_hdr (4); |
431 | pkt->unshift_hdr (4); |
346 | |
432 | |
347 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
433 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
348 | hdr->type = ::conf.icmp_type; |
434 | hdr->type = ::conf.icmp_type; |
349 | hdr->code = 255; |
435 | hdr->code = 255; |
350 | hdr->checksum = 0; |
436 | hdr->checksum = 0; |
351 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
437 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
352 | |
438 | |
|
|
439 | set_tos (icmpv4_fd, icmpv4_tos, tos); |
353 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
440 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
354 | |
441 | |
355 | return true; |
442 | return true; |
356 | } |
443 | } |
357 | #endif |
444 | #endif |
358 | |
445 | |
359 | bool |
446 | bool |
360 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
447 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
361 | { |
448 | { |
362 | #if defined(SOL_IP) && defined(IP_TOS) |
449 | set_tos (udpv4_fd, udpv4_tos, tos); |
363 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
364 | #endif |
|
|
365 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
450 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
366 | |
451 | |
367 | return true; |
452 | return true; |
368 | } |
453 | } |
369 | |
454 | |
… | |
… | |
380 | { |
465 | { |
381 | // broadcast, this is ugly, but due to the security policy |
466 | // broadcast, this is ugly, but due to the security policy |
382 | // we have to connect to all hosts... |
467 | // we have to connect to all hosts... |
383 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
468 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
384 | if ((*c)->conf != THISNODE) |
469 | if ((*c)->conf != THISNODE) |
385 | (*c)->inject_data_packet (pkt, true); |
470 | (*c)->inject_data_packet (pkt); |
386 | } |
471 | } |
387 | } |
472 | } |
388 | |
473 | |
389 | void |
474 | void |
390 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
475 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
391 | { |
476 | { |
392 | unsigned int src = pkt->src (); |
477 | unsigned int src = pkt->src (); |
393 | unsigned int dst = pkt->dst (); |
478 | unsigned int dst = pkt->dst (); |
394 | |
479 | |
395 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"), |
480 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."), |
396 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
481 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
397 | |
482 | |
398 | if (src == 0 || src > conns.size () |
483 | if (src == 0 || src > conns.size () |
399 | || dst > conns.size () |
484 | || dst > conns.size () |
400 | || pkt->typ () >= vpn_packet::PT_MAX) |
485 | || pkt->typ () >= vpn_packet::PT_MAX) |
401 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
486 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
402 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
487 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
403 | else if (dst > conns.size ()) |
488 | else if (dst > conns.size ()) |
404 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
489 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
405 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
490 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
406 | else |
491 | else |
407 | { |
492 | { |
408 | connection *c = conns[src - 1]; |
493 | connection *c = conns[src - 1]; |
409 | |
494 | |
410 | if (dst == 0) |
495 | if (dst == 0) |
411 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
496 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."), |
412 | c->conf->nodename, (const char *)rsi); |
497 | c->conf->nodename, (const char *)rsi); |
413 | else if (dst != THISNODE->id) |
498 | else if (dst != THISNODE->id) |
414 | { |
499 | { |
415 | if (THISNODE->routerprio) |
500 | if (THISNODE->routerprio) |
416 | // the tos setting gets lost here. who cares. |
501 | // the tos setting gets lost here. who cares. |
417 | conns[dst - 1]->inject_vpn_packet (pkt); |
502 | conns[dst - 1]->inject_vpn_packet (pkt); |
418 | else |
503 | else |
419 | slog (L_WARN, |
504 | slog (L_WARN, |
420 | _("%s(%s): forwarding request (=> %s), but we are no router"), |
505 | _("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."), |
421 | c->conf->nodename, (const char *)rsi, |
506 | c->conf->nodename, (const char *)rsi, |
422 | conns[dst - 1]->conf->nodename); |
507 | conns[dst - 1]->conf->nodename); |
423 | } |
508 | } |
424 | else |
509 | else |
425 | c->recv_vpn_packet (pkt, rsi); |
510 | c->recv_vpn_packet (pkt, rsi); |
426 | } |
511 | } |
427 | } |
512 | } |
428 | |
513 | |
429 | void |
514 | bool |
|
|
515 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
516 | { |
|
|
517 | switch (si.prot) |
|
|
518 | { |
|
|
519 | case PROT_IPv4: |
|
|
520 | return send_ipv4_packet (pkt, si, tos); |
|
|
521 | |
|
|
522 | case PROT_UDPv4: |
|
|
523 | return send_udpv4_packet (pkt, si, tos); |
|
|
524 | |
|
|
525 | #if ENABLE_TCP |
|
|
526 | case PROT_TCPv4: |
|
|
527 | return send_tcpv4_packet (pkt, si, tos); |
|
|
528 | #endif |
|
|
529 | #if ENABLE_ICMP |
|
|
530 | case PROT_ICMPv4: |
|
|
531 | return send_icmpv4_packet (pkt, si, tos); |
|
|
532 | #endif |
|
|
533 | #if ENABLE_DNS |
|
|
534 | case PROT_DNSv4: |
|
|
535 | return send_dnsv4_packet (pkt, si, tos); |
|
|
536 | #endif |
|
|
537 | default: |
|
|
538 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
|
|
539 | } |
|
|
540 | |
|
|
541 | return false; |
|
|
542 | } |
|
|
543 | |
|
|
544 | inline void |
430 | vpn::ipv4_ev (io_watcher &w, short revents) |
545 | vpn::ipv4_ev (ev::io &w, int revents) |
431 | { |
546 | { |
432 | if (revents & EVENT_READ) |
547 | if (revents & EV_READ) |
433 | { |
548 | { |
434 | vpn_packet *pkt = new vpn_packet; |
549 | vpn_packet *pkt = new vpn_packet; |
435 | struct sockaddr_in sa; |
550 | struct sockaddr_in sa; |
436 | socklen_t sa_len = sizeof (sa); |
551 | socklen_t sa_len = sizeof (sa); |
437 | int len; |
552 | int len; |
… | |
… | |
442 | |
557 | |
443 | if (len > 0) |
558 | if (len > 0) |
444 | { |
559 | { |
445 | pkt->len = len; |
560 | pkt->len = len; |
446 | |
561 | |
447 | // raw sockets deliver the ipv4, but don't expect it on sends |
562 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
448 | // this is slow, but... |
|
|
449 | pkt->skip_hdr (IP_OVERHEAD); |
563 | pkt->skip_hdr (IP_OVERHEAD); |
450 | |
564 | |
451 | recv_vpn_packet (pkt, si); |
565 | recv_vpn_packet (pkt, si); |
452 | } |
566 | } |
453 | else |
567 | else |
454 | { |
568 | { |
455 | // probably ECONNRESET or somesuch |
569 | // probably ECONNRESET or somesuch |
456 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
570 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
457 | } |
571 | } |
458 | |
572 | |
459 | delete pkt; |
573 | delete pkt; |
460 | } |
574 | } |
461 | else |
575 | else |
462 | { |
576 | { |
463 | slog (L_ERR, |
577 | slog (L_ERR, |
464 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
578 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
465 | revents); |
579 | revents); |
466 | exit (EXIT_FAILURE); |
580 | exit (EXIT_FAILURE); |
467 | } |
581 | } |
468 | } |
582 | } |
469 | |
583 | |
470 | #if ENABLE_ICMP |
584 | #if ENABLE_ICMP |
471 | void |
585 | inline void |
472 | vpn::icmpv4_ev (io_watcher &w, short revents) |
586 | vpn::icmpv4_ev (ev::io &w, int revents) |
473 | { |
587 | { |
474 | if (revents & EVENT_READ) |
588 | if (revents & EV_READ) |
475 | { |
589 | { |
476 | vpn_packet *pkt = new vpn_packet; |
590 | vpn_packet *pkt = new vpn_packet; |
477 | struct sockaddr_in sa; |
591 | struct sockaddr_in sa; |
478 | socklen_t sa_len = sizeof (sa); |
592 | socklen_t sa_len = sizeof (sa); |
479 | int len; |
593 | int len; |
… | |
… | |
499 | } |
613 | } |
500 | } |
614 | } |
501 | else |
615 | else |
502 | { |
616 | { |
503 | // probably ECONNRESET or somesuch |
617 | // probably ECONNRESET or somesuch |
504 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
618 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
505 | } |
619 | } |
506 | |
620 | |
507 | delete pkt; |
621 | delete pkt; |
508 | } |
622 | } |
509 | else |
623 | else |
510 | { |
624 | { |
511 | slog (L_ERR, |
625 | slog (L_ERR, |
512 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
626 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
513 | revents); |
627 | revents); |
514 | exit (EXIT_FAILURE); |
628 | exit (EXIT_FAILURE); |
515 | } |
629 | } |
516 | } |
630 | } |
517 | #endif |
631 | #endif |
518 | |
632 | |
519 | void |
633 | inline void |
520 | vpn::udpv4_ev (io_watcher &w, short revents) |
634 | vpn::udpv4_ev (ev::io &w, int revents) |
521 | { |
635 | { |
522 | if (revents & EVENT_READ) |
636 | if (revents & EV_READ) |
523 | { |
637 | { |
524 | vpn_packet *pkt = new vpn_packet; |
638 | vpn_packet *pkt = new vpn_packet; |
525 | struct sockaddr_in sa; |
639 | struct sockaddr_in sa; |
526 | socklen_t sa_len = sizeof (sa); |
640 | socklen_t sa_len = sizeof (sa); |
527 | int len; |
641 | int len; |
… | |
… | |
537 | recv_vpn_packet (pkt, si); |
651 | recv_vpn_packet (pkt, si); |
538 | } |
652 | } |
539 | else |
653 | else |
540 | { |
654 | { |
541 | // probably ECONNRESET or somesuch |
655 | // probably ECONNRESET or somesuch |
542 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
656 | slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno)); |
543 | } |
657 | } |
544 | |
658 | |
545 | delete pkt; |
659 | delete pkt; |
546 | } |
660 | } |
547 | else |
661 | else |
548 | { |
662 | { |
549 | slog (L_ERR, |
663 | slog (L_ERR, |
550 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
664 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
551 | revents); |
665 | revents); |
552 | exit (EXIT_FAILURE); |
666 | exit (EXIT_FAILURE); |
553 | } |
667 | } |
554 | } |
668 | } |
555 | |
669 | |
556 | void |
670 | inline void |
557 | vpn::tap_ev (io_watcher &w, short revents) |
671 | vpn::tap_ev (ev::io &w, int revents) |
558 | { |
672 | { |
559 | if (revents & EVENT_READ) |
673 | if (revents & EV_READ) |
560 | { |
674 | { |
561 | /* process data */ |
675 | /* process data */ |
562 | tap_packet *pkt; |
676 | tap_packet *pkt; |
563 | |
677 | |
564 | pkt = tap->recv (); |
678 | pkt = tap->recv (); |
… | |
… | |
571 | int dst = mac2id (pkt->dst); |
685 | int dst = mac2id (pkt->dst); |
572 | int src = mac2id (pkt->src); |
686 | int src = mac2id (pkt->src); |
573 | |
687 | |
574 | if (src != THISNODE->id) |
688 | if (src != THISNODE->id) |
575 | { |
689 | { |
576 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
690 | slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
577 | exit (EXIT_FAILURE); |
691 | exit (EXIT_FAILURE); |
578 | } |
692 | } |
579 | |
693 | |
580 | if (dst == THISNODE->id) |
694 | if (dst == THISNODE->id) |
581 | { |
695 | { |
… | |
… | |
593 | } |
707 | } |
594 | else |
708 | else |
595 | abort (); |
709 | abort (); |
596 | } |
710 | } |
597 | |
711 | |
598 | void |
712 | inline void |
599 | vpn::event_cb (time_watcher &w) |
713 | vpn::event_cb (ev::timer &w, int) |
600 | { |
714 | { |
601 | if (events) |
715 | if (events) |
602 | { |
716 | { |
603 | if (events & EVENT_SHUTDOWN) |
717 | if (events & EVENT_SHUTDOWN) |
604 | { |
718 | { |
605 | slog (L_INFO, _("preparing shutdown...")); |
719 | slog (L_INFO, _("preparing shutdown...")); |
606 | |
720 | |
607 | shutdown_all (); |
721 | shutdown_all (); |
608 | remove_pid (conf.pidfilename); |
722 | remove_pid (conf.pidfilename); |
609 | slog (L_INFO, _("terminating")); |
723 | slog (L_INFO, _("exiting.")); |
610 | exit (EXIT_SUCCESS); |
724 | exit (EXIT_SUCCESS); |
611 | } |
725 | } |
612 | |
726 | |
613 | if (events & EVENT_RECONNECT) |
727 | if (events & EVENT_RECONNECT) |
614 | { |
728 | { |
615 | slog (L_INFO, _("forced reconnect")); |
729 | slog (L_INFO, _("forced reconnect.")); |
616 | |
730 | |
617 | reconnect_all (); |
731 | reconnect_all (); |
618 | } |
732 | } |
619 | |
733 | |
620 | events = 0; |
734 | events = 0; |
… | |
… | |
636 | |
750 | |
637 | conns.clear (); |
751 | conns.clear (); |
638 | |
752 | |
639 | connection_init (); |
753 | connection_init (); |
640 | |
754 | |
641 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
755 | for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i) |
642 | i != conf.nodes.end (); ++i) |
756 | conns.push_back (new connection (this, *i)); |
643 | { |
|
|
644 | connection *conn = new connection (this); |
|
|
645 | |
757 | |
646 | conn->conf = *i; |
758 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
647 | conns.push_back (conn); |
|
|
648 | |
|
|
649 | conn->establish_connection (); |
759 | (*c)->establish_connection (); |
650 | } |
|
|
651 | } |
760 | } |
652 | |
761 | |
653 | connection *vpn::find_router () |
762 | bool vpn::can_direct (conf_node *src, conf_node *dst) const |
654 | { |
763 | { |
655 | u32 prio = 1; |
764 | return src != dst |
|
|
765 | && src->may_direct (dst) |
|
|
766 | && dst->may_direct (src) |
|
|
767 | && (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS) |
|
|
768 | || (src->protocols & dst->connectable_protocols ())); |
|
|
769 | } |
|
|
770 | |
|
|
771 | // only works for indirect and routed connections: find a router |
|
|
772 | // from THISNODE to dst |
|
|
773 | connection *vpn::find_router_for (const connection *dst) |
|
|
774 | { |
656 | connection *router = 0; |
775 | connection *router = 0; |
657 | |
776 | |
|
|
777 | // first try to find a router with a direct connection, route there |
|
|
778 | // regardless of any other considerations. |
|
|
779 | { |
|
|
780 | u32 prio = 1; |
|
|
781 | |
|
|
782 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
783 | { |
|
|
784 | connection *c = *i; |
|
|
785 | |
|
|
786 | if (c->conf->routerprio > prio |
|
|
787 | && c->conf != THISNODE |
|
|
788 | && can_direct (c->conf, dst->conf) |
|
|
789 | && c->ictx && c->octx) |
|
|
790 | { |
|
|
791 | prio = c->conf->routerprio; |
|
|
792 | router = c; |
|
|
793 | } |
|
|
794 | } |
|
|
795 | } |
|
|
796 | |
|
|
797 | if (router) |
|
|
798 | return router; |
|
|
799 | |
|
|
800 | // second try find the router with the highest priority, higher than ours |
|
|
801 | { |
|
|
802 | u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1; |
|
|
803 | |
|
|
804 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
805 | { |
|
|
806 | connection *c = *i; |
|
|
807 | |
|
|
808 | if (c->conf->routerprio > prio |
|
|
809 | && c != dst |
|
|
810 | && c->conf != THISNODE |
|
|
811 | && c->ictx && c->octx) |
|
|
812 | { |
|
|
813 | prio = c->conf->routerprio; |
|
|
814 | router = c; |
|
|
815 | } |
|
|
816 | } |
|
|
817 | } |
|
|
818 | |
|
|
819 | return router; |
|
|
820 | } |
|
|
821 | |
|
|
822 | void vpn::connection_established (connection *c) |
|
|
823 | { |
658 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
824 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
659 | { |
825 | { |
660 | connection *c = *i; |
826 | connection *o = *i; |
661 | |
827 | |
662 | if (c->conf->routerprio > prio |
828 | if (!o->is_direct |
663 | && c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use |
829 | && o->si.valid () |
664 | && c->ictx && c->octx |
830 | && c->si != o->si |
665 | && c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode |
831 | && c == find_router_for (o)) |
666 | { |
|
|
667 | prio = c->conf->routerprio; |
|
|
668 | router = c; |
|
|
669 | } |
832 | { |
|
|
833 | slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."), |
|
|
834 | o->conf->nodename, c->conf->nodename); |
|
|
835 | o->rekey (); |
|
|
836 | } |
670 | } |
837 | } |
671 | |
|
|
672 | return router; |
|
|
673 | } |
838 | } |
674 | |
839 | |
675 | void vpn::send_connect_request (int id) |
840 | void vpn::send_connect_request (connection *c) |
676 | { |
841 | { |
677 | connection *c = find_router (); |
842 | connection *r = find_router_for (c); |
678 | |
843 | |
679 | if (c) |
844 | if (r) |
|
|
845 | { |
|
|
846 | slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."), |
|
|
847 | c->conf->nodename, r->conf->nodename); |
680 | c->send_connect_request (id); |
848 | r->send_connect_request (c->conf->id); |
|
|
849 | } |
681 | else |
850 | else |
682 | // no router found, aggressively connect to all routers |
851 | slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."), |
683 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
852 | c->conf->nodename); |
684 | if ((*i)->conf->routerprio && (*i)->conf != THISNODE) |
|
|
685 | (*i)->establish_connection (); |
|
|
686 | } |
853 | } |
687 | |
854 | |
688 | void |
855 | void |
689 | connection::dump_status () |
856 | connection::dump_status () |
690 | { |
857 | { |
691 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
858 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
692 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
859 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
693 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
860 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
694 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
861 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
695 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
862 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
696 | slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"), |
|
|
697 | (long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at)); |
|
|
698 | } |
863 | } |
699 | |
864 | |
700 | void |
865 | void |
701 | vpn::dump_status () |
866 | vpn::dump_status () |
702 | { |
867 | { |
703 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW); |
868 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ()); |
704 | |
869 | |
705 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
870 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
706 | (*c)->dump_status (); |
871 | (*c)->dump_status (); |
707 | |
872 | |
708 | slog (L_NOTICE, _("END status dump")); |
873 | slog (L_NOTICE, _("END status dump")); |
709 | } |
874 | } |
710 | |
875 | |
711 | vpn::vpn (void) |
876 | vpn::vpn (void) |
|
|
877 | { |
712 | : event (this, &vpn::event_cb) |
878 | event .set<vpn, &vpn::event_cb > (this); |
713 | , udpv4_ev_watcher (this, &vpn::udpv4_ev) |
879 | udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
714 | , ipv4_ev_watcher (this, &vpn::ipv4_ev) |
880 | ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
715 | #if ENABLE_TCP |
881 | #if ENABLE_TCP |
716 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
882 | tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
717 | #endif |
883 | #endif |
718 | #if ENABLE_ICMP |
884 | #if ENABLE_ICMP |
719 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
885 | icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |
720 | #endif |
886 | #endif |
721 | #if ENABLE_DNS |
887 | #if ENABLE_DNS |
722 | , dnsv4_ev_watcher (this, &vpn::dnsv4_ev) |
888 | dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this); |
723 | #endif |
889 | #endif |
724 | , tap_ev_watcher (this, &vpn::tap_ev) |
890 | tap_ev_watcher .set<vpn, &vpn::tap_ev > (this); |
725 | { |
|
|
726 | } |
891 | } |
727 | |
892 | |
728 | vpn::~vpn () |
893 | vpn::~vpn () |
729 | { |
894 | { |
730 | } |
895 | } |