1 | /* |
1 | /* |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
3 | Copyright (C) 2003 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> |
23 | |
35 | |
|
|
36 | #include <cstdio> |
|
|
37 | #include <cstring> |
24 | #include <cstdlib> |
38 | #include <cstdlib> |
25 | #include <cstring> |
|
|
26 | #include <cstdio> |
|
|
27 | |
39 | |
28 | #include <sys/types.h> |
40 | #include <sys/types.h> |
29 | #include <sys/socket.h> |
41 | #include <sys/socket.h> |
30 | #include <sys/wait.h> |
42 | #include <sys/wait.h> |
31 | #include <errno.h> |
43 | #include <errno.h> |
… | |
… | |
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); |
84 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
60 | putenv (env); |
|
|
61 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); |
|
|
62 | putenv (env); |
|
|
63 | asprintf (&env, "NODEID=%d", THISNODE->id); |
|
|
64 | putenv (env); |
|
|
65 | asprintf (&env, "IFNAME=%s", tap->interface ()); |
85 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
66 | putenv (env); |
86 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
|
|
87 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
67 | asprintf (&env, "MTU=%d", mtu); |
88 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
68 | putenv (env); |
89 | asprintf (&env, "NODES=%d", conns.size ()); putenv (env); |
69 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
90 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
70 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
|
|
71 | THISNODE->id & 0xff); |
|
|
72 | putenv (env); |
|
|
73 | |
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, |
74 | 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; |
75 | } |
122 | } |
76 | |
123 | |
77 | int |
124 | int |
78 | vpn::setup () |
125 | vpn::setup () |
79 | { |
126 | { |
|
|
127 | ipv4_tos = -1; |
80 | ipv4_fd = -1; |
128 | ipv4_fd = -1; |
81 | |
129 | |
82 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
130 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
83 | { |
131 | { |
84 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
132 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
85 | |
133 | |
86 | if (ipv4_fd < 0) |
134 | if (ipv4_fd < 0) |
87 | return -1; |
135 | return -1; |
88 | |
136 | |
89 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
137 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
|
|
138 | fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC); |
90 | |
139 | |
91 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
140 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
92 | // this I really consider a linux bug. I am neither connected |
141 | // this I really consider a linux bug. I am neither connected |
93 | // nor do I fragment myself. Linux still sets DF and doesn't |
142 | // nor do I fragment myself. Linux still sets DF and doesn't |
94 | // fragment for me sometimes. |
143 | // fragment for me sometimes. |
… | |
… | |
100 | |
149 | |
101 | sockinfo si (THISNODE, PROT_IPv4); |
150 | sockinfo si (THISNODE, PROT_IPv4); |
102 | |
151 | |
103 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
152 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
104 | { |
153 | { |
105 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
154 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
106 | exit (1); |
155 | exit (EXIT_FAILURE); |
107 | } |
156 | } |
108 | |
157 | |
109 | ipv4_ev_watcher.start (ipv4_fd, POLLIN); |
158 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
110 | } |
159 | } |
111 | |
160 | |
|
|
161 | udpv4_tos = -1; |
112 | udpv4_fd = -1; |
162 | udpv4_fd = -1; |
113 | |
163 | |
114 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
164 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
115 | { |
165 | { |
116 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
166 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
117 | |
167 | |
118 | if (udpv4_fd < 0) |
168 | if (udpv4_fd < 0) |
119 | return -1; |
169 | return -1; |
120 | |
170 | |
121 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
171 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
172 | fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC); |
122 | |
173 | |
123 | // standard daemon practise... |
174 | // standard daemon practise... |
124 | { |
175 | { |
125 | int oval = 1; |
176 | int oval = 1; |
126 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
177 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
138 | |
189 | |
139 | sockinfo si (THISNODE, PROT_UDPv4); |
190 | sockinfo si (THISNODE, PROT_UDPv4); |
140 | |
191 | |
141 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
192 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
142 | { |
193 | { |
143 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
194 | slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
144 | exit (1); |
195 | exit (EXIT_FAILURE); |
145 | } |
196 | } |
146 | |
197 | |
147 | udpv4_ev_watcher.start (udpv4_fd, POLLIN); |
198 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
148 | } |
199 | } |
149 | |
200 | |
|
|
201 | icmpv4_tos = -1; |
150 | icmpv4_fd = -1; |
202 | icmpv4_fd = -1; |
151 | |
203 | |
152 | #if ENABLE_ICMP |
204 | #if ENABLE_ICMP |
153 | if (THISNODE->protocols & PROT_ICMPv4) |
205 | if (THISNODE->protocols & PROT_ICMPv4) |
154 | { |
206 | { |
155 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
207 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
156 | |
208 | |
157 | if (icmpv4_fd < 0) |
209 | if (icmpv4_fd < 0) |
158 | return -1; |
210 | return -1; |
159 | |
211 | |
160 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
212 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
213 | fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC); |
161 | |
214 | |
162 | #ifdef ICMP_FILTER |
215 | #ifdef ICMP_FILTER |
163 | { |
216 | { |
164 | icmp_filter oval; |
217 | icmp_filter oval; |
165 | oval.data = 0xffffffff; |
218 | oval.data = 0xffffffff; |
… | |
… | |
174 | // this I really consider a linux bug. I am neither connected |
227 | // this I really consider a linux bug. I am neither connected |
175 | // nor do I fragment myself. Linux still sets DF and doesn't |
228 | // nor do I fragment myself. Linux still sets DF and doesn't |
176 | // fragment for me sometimes. |
229 | // fragment for me sometimes. |
177 | { |
230 | { |
178 | int oval = IP_PMTUDISC_DONT; |
231 | int oval = IP_PMTUDISC_DONT; |
179 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
232 | setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
180 | } |
233 | } |
181 | #endif |
234 | #endif |
182 | |
235 | |
183 | sockinfo si (THISNODE, PROT_ICMPv4); |
236 | sockinfo si (THISNODE, PROT_ICMPv4); |
184 | |
237 | |
185 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
238 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
186 | { |
239 | { |
187 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
240 | slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
188 | exit (1); |
241 | exit (EXIT_FAILURE); |
189 | } |
242 | } |
190 | |
243 | |
191 | icmpv4_ev_watcher.start (icmpv4_fd, POLLIN); |
244 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
192 | } |
245 | } |
193 | #endif |
246 | #endif |
194 | |
247 | |
195 | tcpv4_fd = -1; |
248 | tcpv4_fd = -1; |
196 | |
249 | |
… | |
… | |
201 | |
254 | |
202 | if (tcpv4_fd < 0) |
255 | if (tcpv4_fd < 0) |
203 | return -1; |
256 | return -1; |
204 | |
257 | |
205 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
258 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
259 | fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC); |
206 | |
260 | |
207 | // standard daemon practise... |
261 | // standard daemon practise... |
208 | { |
262 | { |
209 | int oval = 1; |
263 | int oval = 1; |
210 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
264 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
212 | |
266 | |
213 | sockinfo si (THISNODE, PROT_TCPv4); |
267 | sockinfo si (THISNODE, PROT_TCPv4); |
214 | |
268 | |
215 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
269 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
216 | { |
270 | { |
217 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
271 | slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
218 | exit (1); |
272 | exit (EXIT_FAILURE); |
219 | } |
273 | } |
220 | |
274 | |
221 | if (listen (tcpv4_fd, 5)) |
275 | if (listen (tcpv4_fd, 5)) |
222 | { |
276 | { |
223 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
277 | slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
224 | exit (1); |
278 | exit (EXIT_FAILURE); |
|
|
279 | } |
|
|
280 | |
|
|
281 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
|
|
282 | } |
|
|
283 | #endif |
|
|
284 | |
|
|
285 | dnsv4_tos = -1; |
|
|
286 | dnsv4_fd = -1; |
|
|
287 | |
|
|
288 | #if ENABLE_DNS |
|
|
289 | if (THISNODE->protocols & PROT_DNSv4) |
|
|
290 | { |
|
|
291 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
|
|
292 | |
|
|
293 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
|
|
294 | |
|
|
295 | if (dnsv4_fd < 0) |
|
|
296 | return -1; |
|
|
297 | |
|
|
298 | fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK); |
|
|
299 | fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC); |
|
|
300 | |
|
|
301 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
|
|
302 | // this I really consider a linux bug. I am neither connected |
|
|
303 | // nor do I fragment myself. Linux still sets DF and doesn't |
|
|
304 | // fragment for me sometimes. |
|
|
305 | { |
|
|
306 | int oval = IP_PMTUDISC_DONT; |
|
|
307 | setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
225 | } |
308 | } |
226 | |
|
|
227 | tcpv4_ev_watcher.start (tcpv4_fd, POLLIN); |
|
|
228 | } |
|
|
229 | #endif |
309 | # endif |
|
|
310 | |
|
|
311 | // standard daemon practise... |
|
|
312 | { |
|
|
313 | int oval = 1; |
|
|
314 | setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
|
|
315 | } |
|
|
316 | |
|
|
317 | sockinfo si (THISNODE->dns_hostname, |
|
|
318 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
|
|
319 | PROT_DNSv4); |
|
|
320 | |
|
|
321 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
|
|
322 | { |
|
|
323 | slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
|
|
324 | exit (EXIT_FAILURE); |
|
|
325 | } |
|
|
326 | |
|
|
327 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
|
|
328 | } |
|
|
329 | #endif |
|
|
330 | |
|
|
331 | ///////////////////////////////////////////////////////////////////////////// |
|
|
332 | |
|
|
333 | reconnect_all (); |
|
|
334 | |
|
|
335 | ///////////////////////////////////////////////////////////////////////////// |
230 | |
336 | |
231 | tap = new tap_device (); |
337 | tap = new tap_device (); |
232 | if (!tap) //D this, of course, never catches |
338 | if (!tap) //D this, of course, never catches |
233 | { |
339 | { |
234 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
340 | slog (L_ERR, _("cannot create network interface '%s', exiting."), conf.ifname); |
235 | exit (1); |
341 | exit (EXIT_FAILURE); |
236 | } |
342 | } |
237 | |
343 | |
238 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
344 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
239 | |
345 | |
|
|
346 | run_script_cb cb; |
|
|
347 | cb.set<vpn, &vpn::script_if_init> (this); |
|
|
348 | |
|
|
349 | if (tap->if_up () && |
|
|
350 | !run_script (cb, true)) |
|
|
351 | { |
|
|
352 | slog (L_ERR, _("interface initialization command '%s' failed, exiting."), |
|
|
353 | tap->if_up ()); |
|
|
354 | exit (EXIT_FAILURE); |
|
|
355 | } |
|
|
356 | |
|
|
357 | cb.set<vpn, &vpn::script_if_up> (this); |
|
|
358 | if (!run_script (cb, true)) |
|
|
359 | { |
|
|
360 | slog (L_ERR, _("if-up command execution failed, exiting.")); |
|
|
361 | exit (EXIT_FAILURE); |
|
|
362 | } |
|
|
363 | |
240 | tap_ev_watcher.start (tap->fd, POLLIN); |
364 | tap_ev_watcher.start (tap->fd, EV_READ); |
241 | |
|
|
242 | reconnect_all (); |
|
|
243 | |
365 | |
244 | return 0; |
366 | return 0; |
245 | } |
|
|
246 | |
|
|
247 | // send a vpn packet out to other hosts |
|
|
248 | bool |
|
|
249 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
250 | { |
|
|
251 | switch (si.prot) |
|
|
252 | { |
|
|
253 | case PROT_IPv4: |
|
|
254 | return send_ipv4_packet (pkt, si, tos); |
|
|
255 | |
|
|
256 | case PROT_UDPv4: |
|
|
257 | return send_udpv4_packet (pkt, si, tos); |
|
|
258 | |
|
|
259 | #if ENABLE_TCP |
|
|
260 | case PROT_TCPv4: |
|
|
261 | return send_tcpv4_packet (pkt, si, tos); |
|
|
262 | #endif |
|
|
263 | |
|
|
264 | #if ENABLE_ICMP |
|
|
265 | case PROT_ICMPv4: |
|
|
266 | return send_icmpv4_packet (pkt, si, tos); |
|
|
267 | #endif |
|
|
268 | |
|
|
269 | default: |
|
|
270 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
271 | return false; |
|
|
272 | } |
|
|
273 | } |
367 | } |
274 | |
368 | |
275 | bool |
369 | bool |
276 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
370 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
277 | { |
371 | { |
278 | #if defined(SOL_IP) && defined(IP_TOS) |
372 | set_tos (ipv4_fd, ipv4_tos, tos); |
279 | setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
280 | #endif |
|
|
281 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
373 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
282 | |
374 | |
283 | return true; |
375 | return true; |
284 | } |
376 | } |
285 | |
377 | |
… | |
… | |
308 | |
400 | |
309 | #if ENABLE_ICMP |
401 | #if ENABLE_ICMP |
310 | bool |
402 | bool |
311 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
403 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
312 | { |
404 | { |
313 | #if defined(SOL_IP) && defined(IP_TOS) |
|
|
314 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
315 | #endif |
|
|
316 | |
|
|
317 | pkt->unshift_hdr (4); |
405 | pkt->unshift_hdr (4); |
318 | |
406 | |
319 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
407 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
320 | hdr->type = ::conf.icmp_type; |
408 | hdr->type = ::conf.icmp_type; |
321 | hdr->code = 255; |
409 | hdr->code = 255; |
322 | hdr->checksum = 0; |
410 | hdr->checksum = 0; |
323 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
411 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
324 | |
412 | |
|
|
413 | set_tos (icmpv4_fd, icmpv4_tos, tos); |
325 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
414 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
326 | |
415 | |
327 | return true; |
416 | return true; |
328 | } |
417 | } |
329 | #endif |
418 | #endif |
330 | |
419 | |
331 | bool |
420 | bool |
332 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
421 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
333 | { |
422 | { |
334 | #if defined(SOL_IP) && defined(IP_TOS) |
423 | set_tos (udpv4_fd, udpv4_tos, tos); |
335 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
336 | #endif |
|
|
337 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
424 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
338 | |
425 | |
339 | return true; |
426 | return true; |
340 | } |
427 | } |
341 | |
428 | |
… | |
… | |
352 | { |
439 | { |
353 | // broadcast, this is ugly, but due to the security policy |
440 | // broadcast, this is ugly, but due to the security policy |
354 | // we have to connect to all hosts... |
441 | // we have to connect to all hosts... |
355 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
442 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
356 | if ((*c)->conf != THISNODE) |
443 | if ((*c)->conf != THISNODE) |
357 | (*c)->inject_data_packet (pkt, true); |
444 | (*c)->inject_data_packet (pkt); |
358 | } |
445 | } |
359 | } |
446 | } |
360 | |
447 | |
361 | void |
448 | void |
362 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
449 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
363 | { |
450 | { |
364 | unsigned int src = pkt->src (); |
451 | unsigned int src = pkt->src (); |
365 | unsigned int dst = pkt->dst (); |
452 | unsigned int dst = pkt->dst (); |
366 | |
453 | |
367 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"), |
454 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."), |
368 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
455 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
369 | |
456 | |
370 | if (src == 0 || src > conns.size () |
457 | if (src == 0 || src > conns.size () |
371 | || dst > conns.size () |
458 | || dst > conns.size () |
372 | || pkt->typ () >= vpn_packet::PT_MAX) |
459 | || pkt->typ () >= vpn_packet::PT_MAX) |
373 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
460 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
374 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
461 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
375 | else if (dst > conns.size ()) |
462 | else if (dst > conns.size ()) |
376 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
463 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
377 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
464 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
378 | else |
465 | else |
379 | { |
466 | { |
380 | connection *c = conns[src - 1]; |
467 | connection *c = conns[src - 1]; |
381 | |
468 | |
382 | if (dst == 0) |
469 | if (dst == 0) |
383 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
470 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."), |
384 | c->conf->nodename, (const char *)rsi); |
471 | c->conf->nodename, (const char *)rsi); |
385 | else if (dst != THISNODE->id) |
472 | else if (dst != THISNODE->id) |
386 | { |
473 | { |
387 | if (THISNODE->routerprio) |
474 | if (THISNODE->routerprio) |
388 | // the tos setting gets lost here. who cares. |
475 | // the tos setting gets lost here. who cares. |
389 | conns[dst - 1]->inject_vpn_packet (pkt); |
476 | conns[dst - 1]->inject_vpn_packet (pkt); |
390 | else |
477 | else |
391 | slog (L_WARN, |
478 | slog (L_WARN, |
392 | _("%s(%s): forwarding request (=> %s), but we are no router"), |
479 | _("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."), |
393 | c->conf->nodename, (const char *)rsi, |
480 | c->conf->nodename, (const char *)rsi, |
394 | conns[dst - 1]->conf->nodename); |
481 | conns[dst - 1]->conf->nodename); |
395 | } |
482 | } |
396 | else |
483 | else |
397 | c->recv_vpn_packet (pkt, rsi); |
484 | c->recv_vpn_packet (pkt, rsi); |
398 | } |
485 | } |
399 | } |
486 | } |
400 | |
487 | |
401 | void |
488 | bool |
|
|
489 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
490 | { |
|
|
491 | switch (si.prot) |
|
|
492 | { |
|
|
493 | case PROT_IPv4: |
|
|
494 | return send_ipv4_packet (pkt, si, tos); |
|
|
495 | |
|
|
496 | case PROT_UDPv4: |
|
|
497 | return send_udpv4_packet (pkt, si, tos); |
|
|
498 | |
|
|
499 | #if ENABLE_TCP |
|
|
500 | case PROT_TCPv4: |
|
|
501 | return send_tcpv4_packet (pkt, si, tos); |
|
|
502 | #endif |
|
|
503 | #if ENABLE_ICMP |
|
|
504 | case PROT_ICMPv4: |
|
|
505 | return send_icmpv4_packet (pkt, si, tos); |
|
|
506 | #endif |
|
|
507 | #if ENABLE_DNS |
|
|
508 | case PROT_DNSv4: |
|
|
509 | return send_dnsv4_packet (pkt, si, tos); |
|
|
510 | #endif |
|
|
511 | default: |
|
|
512 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
|
|
513 | } |
|
|
514 | |
|
|
515 | return false; |
|
|
516 | } |
|
|
517 | |
|
|
518 | inline void |
402 | vpn::ipv4_ev (io_watcher &w, short revents) |
519 | vpn::ipv4_ev (ev::io &w, int revents) |
403 | { |
520 | { |
404 | if (revents & (POLLIN | POLLERR)) |
521 | if (revents & EV_READ) |
405 | { |
522 | { |
406 | vpn_packet *pkt = new vpn_packet; |
523 | vpn_packet *pkt = new vpn_packet; |
407 | struct sockaddr_in sa; |
524 | struct sockaddr_in sa; |
408 | socklen_t sa_len = sizeof (sa); |
525 | socklen_t sa_len = sizeof (sa); |
409 | int len; |
526 | int len; |
… | |
… | |
414 | |
531 | |
415 | if (len > 0) |
532 | if (len > 0) |
416 | { |
533 | { |
417 | pkt->len = len; |
534 | pkt->len = len; |
418 | |
535 | |
419 | // raw sockets deliver the ipv4, but don't expect it on sends |
536 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
420 | // this is slow, but... |
|
|
421 | pkt->skip_hdr (IP_OVERHEAD); |
537 | pkt->skip_hdr (IP_OVERHEAD); |
422 | |
538 | |
423 | recv_vpn_packet (pkt, si); |
539 | recv_vpn_packet (pkt, si); |
424 | } |
540 | } |
425 | else |
541 | else |
426 | { |
542 | { |
427 | // probably ECONNRESET or somesuch |
543 | // probably ECONNRESET or somesuch |
428 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
544 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
429 | } |
545 | } |
430 | |
546 | |
431 | delete pkt; |
547 | delete pkt; |
432 | } |
548 | } |
433 | else if (revents & POLLHUP) |
|
|
434 | { |
|
|
435 | // this cannot ;) happen on udp sockets |
|
|
436 | slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating.")); |
|
|
437 | exit (1); |
|
|
438 | } |
|
|
439 | else |
549 | else |
440 | { |
550 | { |
441 | slog (L_ERR, |
551 | slog (L_ERR, |
442 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
552 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
443 | revents); |
553 | revents); |
444 | exit (1); |
554 | exit (EXIT_FAILURE); |
445 | } |
555 | } |
446 | } |
556 | } |
447 | |
557 | |
448 | #if ENABLE_ICMP |
558 | #if ENABLE_ICMP |
449 | void |
559 | inline void |
450 | vpn::icmpv4_ev (io_watcher &w, short revents) |
560 | vpn::icmpv4_ev (ev::io &w, int revents) |
451 | { |
561 | { |
452 | if (revents & (POLLIN | POLLERR)) |
562 | if (revents & EV_READ) |
453 | { |
563 | { |
454 | vpn_packet *pkt = new vpn_packet; |
564 | vpn_packet *pkt = new vpn_packet; |
455 | struct sockaddr_in sa; |
565 | struct sockaddr_in sa; |
456 | socklen_t sa_len = sizeof (sa); |
566 | socklen_t sa_len = sizeof (sa); |
457 | int len; |
567 | int len; |
… | |
… | |
477 | } |
587 | } |
478 | } |
588 | } |
479 | else |
589 | else |
480 | { |
590 | { |
481 | // probably ECONNRESET or somesuch |
591 | // probably ECONNRESET or somesuch |
482 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
592 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
483 | } |
593 | } |
484 | |
594 | |
485 | delete pkt; |
595 | delete pkt; |
486 | } |
596 | } |
487 | else if (revents & POLLHUP) |
|
|
488 | { |
|
|
489 | // this cannot ;) happen on udp sockets |
|
|
490 | slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating.")); |
|
|
491 | exit (1); |
|
|
492 | } |
|
|
493 | else |
597 | else |
494 | { |
598 | { |
495 | slog (L_ERR, |
599 | slog (L_ERR, |
496 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
600 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
497 | revents); |
601 | revents); |
498 | exit (1); |
602 | exit (EXIT_FAILURE); |
499 | } |
603 | } |
500 | } |
604 | } |
501 | #endif |
605 | #endif |
502 | |
606 | |
503 | void |
607 | inline void |
504 | vpn::udpv4_ev (io_watcher &w, short revents) |
608 | vpn::udpv4_ev (ev::io &w, int revents) |
505 | { |
609 | { |
506 | if (revents & (POLLIN | POLLERR)) |
610 | if (revents & EV_READ) |
507 | { |
611 | { |
508 | vpn_packet *pkt = new vpn_packet; |
612 | vpn_packet *pkt = new vpn_packet; |
509 | struct sockaddr_in sa; |
613 | struct sockaddr_in sa; |
510 | socklen_t sa_len = sizeof (sa); |
614 | socklen_t sa_len = sizeof (sa); |
511 | int len; |
615 | int len; |
… | |
… | |
521 | recv_vpn_packet (pkt, si); |
625 | recv_vpn_packet (pkt, si); |
522 | } |
626 | } |
523 | else |
627 | else |
524 | { |
628 | { |
525 | // probably ECONNRESET or somesuch |
629 | // probably ECONNRESET or somesuch |
526 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
630 | slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno)); |
527 | } |
631 | } |
528 | |
632 | |
529 | delete pkt; |
633 | delete pkt; |
530 | } |
634 | } |
531 | else if (revents & POLLHUP) |
|
|
532 | { |
|
|
533 | // this cannot ;) happen on udp sockets |
|
|
534 | slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating.")); |
|
|
535 | exit (1); |
|
|
536 | } |
|
|
537 | else |
635 | else |
538 | { |
636 | { |
539 | slog (L_ERR, |
637 | slog (L_ERR, |
540 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
638 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
541 | revents); |
639 | revents); |
542 | exit (1); |
640 | exit (EXIT_FAILURE); |
543 | } |
641 | } |
544 | } |
642 | } |
545 | |
643 | |
546 | void |
644 | inline void |
547 | vpn::tap_ev (io_watcher &w, short revents) |
645 | vpn::tap_ev (ev::io &w, int revents) |
548 | { |
646 | { |
549 | if (revents & POLLIN) |
647 | if (revents & EV_READ) |
550 | { |
648 | { |
551 | /* process data */ |
649 | /* process data */ |
552 | tap_packet *pkt; |
650 | tap_packet *pkt; |
553 | |
651 | |
554 | pkt = tap->recv (); |
652 | pkt = tap->recv (); |
… | |
… | |
561 | int dst = mac2id (pkt->dst); |
659 | int dst = mac2id (pkt->dst); |
562 | int src = mac2id (pkt->src); |
660 | int src = mac2id (pkt->src); |
563 | |
661 | |
564 | if (src != THISNODE->id) |
662 | if (src != THISNODE->id) |
565 | { |
663 | { |
566 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
664 | slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
567 | exit (1); |
665 | exit (EXIT_FAILURE); |
568 | } |
666 | } |
569 | |
667 | |
570 | if (dst == THISNODE->id) |
668 | if (dst == THISNODE->id) |
571 | { |
669 | { |
572 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
670 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
573 | exit (1); |
671 | exit (EXIT_FAILURE); |
574 | } |
672 | } |
575 | |
673 | |
576 | if (dst > conns.size ()) |
674 | if (dst > conns.size ()) |
577 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
675 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
578 | else |
676 | else |
579 | inject_data_packet (pkt, dst); |
677 | inject_data_packet (pkt, dst); |
580 | } |
678 | } |
581 | |
679 | |
582 | delete pkt; |
680 | delete pkt; |
583 | } |
681 | } |
584 | else if (revents & (POLLHUP | POLLERR)) |
|
|
585 | { |
|
|
586 | slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating.")); |
|
|
587 | exit (1); |
|
|
588 | } |
|
|
589 | else |
682 | else |
590 | abort (); |
683 | abort (); |
591 | } |
684 | } |
592 | |
685 | |
593 | void |
686 | inline void |
594 | vpn::event_cb (time_watcher &w) |
687 | vpn::event_cb (ev::timer &w, int) |
595 | { |
688 | { |
596 | if (events) |
689 | if (events) |
597 | { |
690 | { |
598 | if (events & EVENT_SHUTDOWN) |
691 | if (events & EVENT_SHUTDOWN) |
599 | { |
692 | { |
600 | slog (L_INFO, _("preparing shutdown...")); |
693 | slog (L_INFO, _("preparing shutdown...")); |
601 | |
694 | |
602 | shutdown_all (); |
695 | shutdown_all (); |
603 | |
|
|
604 | remove_pid (pidfilename); |
696 | remove_pid (conf.pidfilename); |
605 | |
|
|
606 | slog (L_INFO, _("terminating")); |
697 | slog (L_INFO, _("exiting.")); |
607 | |
698 | exit (EXIT_SUCCESS); |
608 | exit (0); |
|
|
609 | } |
699 | } |
610 | |
700 | |
611 | if (events & EVENT_RECONNECT) |
701 | if (events & EVENT_RECONNECT) |
612 | { |
702 | { |
613 | slog (L_INFO, _("forced reconnect")); |
703 | slog (L_INFO, _("forced reconnect.")); |
614 | |
704 | |
615 | reconnect_all (); |
705 | reconnect_all (); |
616 | } |
706 | } |
617 | |
707 | |
618 | events = 0; |
708 | events = 0; |
619 | } |
709 | } |
620 | |
|
|
621 | w.at = TSTAMP_CANCEL; |
|
|
622 | } |
710 | } |
623 | |
711 | |
624 | void |
712 | void |
625 | vpn::shutdown_all () |
713 | vpn::shutdown_all () |
626 | { |
714 | { |
… | |
… | |
639 | connection_init (); |
727 | connection_init (); |
640 | |
728 | |
641 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
729 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
642 | i != conf.nodes.end (); ++i) |
730 | i != conf.nodes.end (); ++i) |
643 | { |
731 | { |
644 | connection *conn = new connection (this); |
732 | connection *conn = new connection (this, *i); |
645 | |
|
|
646 | conn->conf = *i; |
|
|
647 | conns.push_back (conn); |
733 | conns.push_back (conn); |
648 | |
|
|
649 | conn->establish_connection (); |
734 | conn->establish_connection (); |
650 | } |
735 | } |
651 | } |
736 | } |
652 | |
737 | |
653 | connection *vpn::find_router () |
738 | bool vpn::can_direct (conf_node *src, conf_node *dst) const |
654 | { |
739 | { |
655 | u32 prio = 1; |
740 | return src != dst |
|
|
741 | && src->may_direct (dst) |
|
|
742 | && dst->may_direct (src) |
|
|
743 | && (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS) |
|
|
744 | || (src->protocols & dst->connectable_protocols ())); |
|
|
745 | } |
|
|
746 | |
|
|
747 | // only works for indirect and routed connections: find a router |
|
|
748 | // from THISNODE to dst |
|
|
749 | connection *vpn::find_router_for (const connection *dst) |
|
|
750 | { |
656 | connection *router = 0; |
751 | connection *router = 0; |
657 | |
752 | |
|
|
753 | // first try to find a router with a direct connection |
|
|
754 | { |
|
|
755 | u32 prio = 1; |
|
|
756 | |
|
|
757 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
758 | { |
|
|
759 | connection *c = *i; |
|
|
760 | |
|
|
761 | if (c->conf->routerprio > prio |
|
|
762 | && c->conf != THISNODE |
|
|
763 | && c != dst |
|
|
764 | && can_direct (c->conf, dst->conf)) |
|
|
765 | { |
|
|
766 | if (c->ictx && c->octx) |
|
|
767 | { |
|
|
768 | prio = c->conf->routerprio; |
|
|
769 | router = c; |
|
|
770 | } |
|
|
771 | else |
|
|
772 | c->establish_connection (); |
|
|
773 | } |
|
|
774 | } |
|
|
775 | } |
|
|
776 | |
|
|
777 | if (router) |
|
|
778 | return router; |
|
|
779 | |
|
|
780 | // second try find the router with the highest priority higher than ours |
|
|
781 | { |
|
|
782 | u32 prio = 1; |
|
|
783 | |
|
|
784 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
785 | { |
|
|
786 | connection *c = *i; |
|
|
787 | |
|
|
788 | if (c->conf->routerprio > prio |
|
|
789 | && c->conf->routerprio > THISNODE->routerprio |
|
|
790 | && c != dst |
|
|
791 | && c->conf != THISNODE) |
|
|
792 | { |
|
|
793 | if (c->ictx && c->octx) |
|
|
794 | { |
|
|
795 | prio = c->conf->routerprio; |
|
|
796 | router = c; |
|
|
797 | } |
|
|
798 | else |
|
|
799 | c->establish_connection (); |
|
|
800 | } |
|
|
801 | } |
|
|
802 | } |
|
|
803 | return router; |
|
|
804 | } |
|
|
805 | |
|
|
806 | void vpn::connection_established (connection *c) |
|
|
807 | { |
658 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
808 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
659 | { |
809 | { |
660 | connection *c = *i; |
810 | connection *o = *i; |
661 | |
811 | |
662 | if (c->conf->routerprio > prio |
812 | if (!o->is_direct |
663 | && c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use |
813 | && o->si.valid () |
664 | && c->ictx && c->octx |
814 | && c->si != o->si |
665 | && c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode |
815 | && c == find_router_for (o)) |
666 | { |
|
|
667 | prio = c->conf->routerprio; |
|
|
668 | router = c; |
|
|
669 | } |
816 | { |
|
|
817 | slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."), |
|
|
818 | o->conf->nodename, c->conf->nodename); |
|
|
819 | o->rekey (); |
|
|
820 | } |
670 | } |
821 | } |
671 | |
|
|
672 | return router; |
|
|
673 | } |
822 | } |
674 | |
823 | |
675 | void vpn::send_connect_request (int id) |
824 | void vpn::send_connect_request (int id) |
676 | { |
825 | { |
677 | connection *c = find_router (); |
826 | connection *c = find_router_for (conns[id]); |
678 | |
827 | |
679 | if (c) |
828 | if (c) |
|
|
829 | { |
|
|
830 | slog (L_TRACE, _("%s: no way to connect, sending mediated connection request via %s."), |
|
|
831 | conns[id]->conf->nodename, c->conf->nodename); |
680 | c->send_connect_request (id); |
832 | c->send_connect_request (id); |
|
|
833 | } |
681 | else |
834 | else |
682 | // no router found, aggressively connect to all routers |
835 | slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect."), conns[id]->conf->nodename); |
683 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
684 | if ((*i)->conf->routerprio && (*i)->conf != THISNODE) |
|
|
685 | (*i)->establish_connection (); |
|
|
686 | } |
836 | } |
687 | |
837 | |
688 | void |
838 | void |
689 | connection::dump_status () |
839 | connection::dump_status () |
690 | { |
840 | { |
691 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
841 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
692 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
842 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
693 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
843 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
694 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
844 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
695 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
845 | (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 | } |
846 | } |
699 | |
847 | |
700 | void |
848 | void |
701 | vpn::dump_status () |
849 | vpn::dump_status () |
702 | { |
850 | { |
703 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW); |
851 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ()); |
704 | |
852 | |
705 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
853 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
706 | (*c)->dump_status (); |
854 | (*c)->dump_status (); |
707 | |
855 | |
708 | slog (L_NOTICE, _("END status dump")); |
856 | slog (L_NOTICE, _("END status dump")); |
709 | } |
857 | } |
710 | |
858 | |
711 | vpn::vpn (void) |
859 | vpn::vpn (void) |
|
|
860 | { |
712 | : event (this, &vpn::event_cb) |
861 | event .set<vpn, &vpn::event_cb > (this); |
713 | , udpv4_ev_watcher (this, &vpn::udpv4_ev) |
862 | udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
714 | , ipv4_ev_watcher (this, &vpn::ipv4_ev) |
863 | ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
715 | #if ENABLE_TCP |
864 | #if ENABLE_TCP |
716 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
865 | tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
717 | #endif |
866 | #endif |
718 | #if ENABLE_ICMP |
867 | #if ENABLE_ICMP |
719 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
868 | icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |
720 | #endif |
869 | #endif |
721 | , tap_ev_watcher (this, &vpn::tap_ev) |
870 | #if ENABLE_DNS |
722 | { |
871 | dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this); |
|
|
872 | #endif |
|
|
873 | tap_ev_watcher .set<vpn, &vpn::tap_ev > (this); |
723 | } |
874 | } |
724 | |
875 | |
725 | vpn::~vpn () |
876 | vpn::~vpn () |
726 | { |
877 | { |
727 | } |
878 | } |