1 |
pcg |
1.1 |
/* |
2 |
|
|
vpn.C -- handle the protocol, encryption, handshaking etc. |
3 |
root |
1.58 |
Copyright (C) 2003-2008,2010,2011 Marc Lehmann <gvpe@schmorp.de> |
4 |
pcg |
1.1 |
|
5 |
pcg |
1.28 |
This file is part of GVPE. |
6 |
|
|
|
7 |
pcg |
1.47 |
GVPE is free software; you can redistribute it and/or modify it |
8 |
|
|
under the terms of the GNU General Public License as published by the |
9 |
|
|
Free Software Foundation; either version 3 of the License, or (at your |
10 |
|
|
option) any later version. |
11 |
|
|
|
12 |
|
|
This program is distributed in the hope that it will be useful, but |
13 |
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
15 |
|
|
Public License for more details. |
16 |
|
|
|
17 |
|
|
You should have received a copy of the GNU General Public License along |
18 |
|
|
with this program; if not, see <http://www.gnu.org/licenses/>. |
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. |
30 |
pcg |
1.1 |
*/ |
31 |
|
|
|
32 |
|
|
#include "config.h" |
33 |
|
|
|
34 |
|
|
#include <list> |
35 |
|
|
|
36 |
pcg |
1.23 |
#include <cstdio> |
37 |
|
|
#include <cstring> |
38 |
pcg |
1.1 |
#include <cstdlib> |
39 |
|
|
|
40 |
|
|
#include <sys/types.h> |
41 |
|
|
#include <sys/socket.h> |
42 |
|
|
#include <sys/wait.h> |
43 |
|
|
#include <errno.h> |
44 |
|
|
#include <time.h> |
45 |
|
|
#include <unistd.h> |
46 |
pcg |
1.11 |
#include <fcntl.h> |
47 |
pcg |
1.14 |
#include <sys/socket.h> |
48 |
pcg |
1.15 |
|
49 |
|
|
#include "netcompat.h" |
50 |
pcg |
1.1 |
|
51 |
|
|
#include "pidfile.h" |
52 |
|
|
|
53 |
|
|
#include "connection.h" |
54 |
|
|
#include "util.h" |
55 |
|
|
#include "vpn.h" |
56 |
|
|
|
57 |
pcg |
1.20 |
vpn network; // THE vpn (bad design...) |
58 |
|
|
|
59 |
pcg |
1.1 |
///////////////////////////////////////////////////////////////////////////// |
60 |
|
|
|
61 |
pcg |
1.41 |
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 |
pcg |
1.33 |
void |
74 |
|
|
vpn::script_init_env () |
75 |
pcg |
1.1 |
{ |
76 |
|
|
// the tunnel device mtu should be the physical mtu - overhead |
77 |
|
|
// the tricky part is rounding to the cipher key blocksize |
78 |
|
|
int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
79 |
|
|
mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
80 |
|
|
mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
81 |
|
|
mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
82 |
|
|
|
83 |
|
|
char *env; |
84 |
pcg |
1.21 |
asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
85 |
|
|
asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
86 |
|
|
asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
87 |
|
|
asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
88 |
|
|
asprintf (&env, "MTU=%d", mtu); putenv (env); |
89 |
pcg |
1.34 |
asprintf (&env, "NODES=%d", conns.size ()); putenv (env); |
90 |
|
|
asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
91 |
|
|
|
92 |
|
|
conns [THISNODE->id - 1]->script_init_env (""); |
93 |
pcg |
1.33 |
|
94 |
pcg |
1.34 |
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 |
pcg |
1.33 |
} |
101 |
|
|
|
102 |
pcg |
1.45 |
inline const char * |
103 |
|
|
vpn::script_if_init () |
104 |
pcg |
1.33 |
{ |
105 |
|
|
script_init_env (); |
106 |
pcg |
1.1 |
|
107 |
pcg |
1.33 |
return tap->if_up (); |
108 |
|
|
} |
109 |
|
|
|
110 |
pcg |
1.45 |
inline const char * |
111 |
|
|
vpn::script_if_up () |
112 |
pcg |
1.33 |
{ |
113 |
|
|
script_init_env (); |
114 |
|
|
|
115 |
|
|
char *filename; |
116 |
|
|
asprintf (&filename, |
117 |
|
|
"%s/%s", |
118 |
|
|
confbase, |
119 |
|
|
::conf.script_if_up ? ::conf.script_if_up : "if-up"); |
120 |
|
|
|
121 |
|
|
return filename; |
122 |
pcg |
1.1 |
} |
123 |
|
|
|
124 |
|
|
int |
125 |
pcg |
1.54 |
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 |
pcg |
1.55 |
if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark)) |
141 |
|
|
slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno)); |
142 |
pcg |
1.54 |
#endif |
143 |
|
|
|
144 |
|
|
return fd; |
145 |
|
|
} |
146 |
|
|
|
147 |
|
|
int |
148 |
pcg |
1.1 |
vpn::setup () |
149 |
|
|
{ |
150 |
pcg |
1.51 |
int success = 0; |
151 |
|
|
|
152 |
root |
1.62 |
#if 1//D2 |
153 |
|
|
ipv42_tos = -1; |
154 |
|
|
ipv42_fd = -1; |
155 |
|
|
|
156 |
|
|
if (THISNODE->protocols & PROT_IPv42 && ::conf.ip_proto) |
157 |
|
|
{ |
158 |
|
|
ipv42_fd = setup_socket (PROT_IPv42, PF_INET, SOCK_RAW, ::conf.ip2_proto); |
159 |
|
|
|
160 |
|
|
if (ipv42_fd < 0) |
161 |
|
|
return -1; |
162 |
|
|
|
163 |
|
|
#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
164 |
|
|
// this I really consider a linux bug. I am neither connected |
165 |
|
|
// nor do I fragment myself. Linux still sets DF and doesn't |
166 |
|
|
// fragment for me sometimes. |
167 |
|
|
{ |
168 |
|
|
int oval = IP_PMTUDISC_DONT; |
169 |
|
|
setsockopt (ipv42_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
170 |
|
|
} |
171 |
|
|
#endif |
172 |
|
|
|
173 |
|
|
sockinfo si (THISNODE, PROT_IPv42); |
174 |
|
|
|
175 |
|
|
if (bind (ipv42_fd, si.sav4 (), si.salenv4 ())) |
176 |
|
|
{ |
177 |
|
|
slog (L_ERR, _("can't bind ipv42 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
178 |
|
|
return -1; |
179 |
|
|
} |
180 |
|
|
|
181 |
|
|
ipv42_ev_watcher.start (ipv42_fd, EV_READ); |
182 |
|
|
++success; |
183 |
|
|
} |
184 |
|
|
else |
185 |
|
|
THISNODE->protocols &= ~PROT_IPv42; |
186 |
|
|
#endif |
187 |
|
|
|
188 |
pcg |
1.41 |
ipv4_tos = -1; |
189 |
|
|
ipv4_fd = -1; |
190 |
pcg |
1.1 |
|
191 |
pcg |
1.8 |
if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
192 |
pcg |
1.1 |
{ |
193 |
pcg |
1.54 |
ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto); |
194 |
pcg |
1.1 |
|
195 |
pcg |
1.8 |
if (ipv4_fd < 0) |
196 |
pcg |
1.1 |
return -1; |
197 |
|
|
|
198 |
pcg |
1.14 |
#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
199 |
pcg |
1.1 |
// this I really consider a linux bug. I am neither connected |
200 |
|
|
// nor do I fragment myself. Linux still sets DF and doesn't |
201 |
|
|
// fragment for me sometimes. |
202 |
|
|
{ |
203 |
|
|
int oval = IP_PMTUDISC_DONT; |
204 |
pcg |
1.8 |
setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
205 |
pcg |
1.1 |
} |
206 |
|
|
#endif |
207 |
|
|
|
208 |
pcg |
1.9 |
sockinfo si (THISNODE, PROT_IPv4); |
209 |
|
|
|
210 |
|
|
if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
211 |
|
|
{ |
212 |
pcg |
1.49 |
slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
213 |
pcg |
1.54 |
return -1; |
214 |
pcg |
1.9 |
} |
215 |
|
|
|
216 |
pcg |
1.39 |
ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
217 |
pcg |
1.51 |
++success; |
218 |
pcg |
1.1 |
} |
219 |
pcg |
1.51 |
else |
220 |
|
|
THISNODE->protocols &= ~PROT_IPv4; |
221 |
pcg |
1.1 |
|
222 |
pcg |
1.41 |
udpv4_tos = -1; |
223 |
|
|
udpv4_fd = -1; |
224 |
pcg |
1.8 |
|
225 |
|
|
if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
226 |
pcg |
1.1 |
{ |
227 |
pcg |
1.54 |
udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
228 |
pcg |
1.1 |
|
229 |
pcg |
1.8 |
if (udpv4_fd < 0) |
230 |
pcg |
1.1 |
return -1; |
231 |
|
|
|
232 |
pcg |
1.8 |
// standard daemon practise... |
233 |
|
|
{ |
234 |
|
|
int oval = 1; |
235 |
|
|
setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
236 |
|
|
} |
237 |
|
|
|
238 |
pcg |
1.14 |
#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
239 |
pcg |
1.9 |
// this I really consider a linux bug. I am neither connected |
240 |
|
|
// nor do I fragment myself. Linux still sets DF and doesn't |
241 |
|
|
// fragment for me sometimes. |
242 |
|
|
{ |
243 |
|
|
int oval = IP_PMTUDISC_DONT; |
244 |
|
|
setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
245 |
|
|
} |
246 |
|
|
#endif |
247 |
|
|
|
248 |
pcg |
1.8 |
sockinfo si (THISNODE, PROT_UDPv4); |
249 |
pcg |
1.2 |
|
250 |
pcg |
1.8 |
if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
251 |
pcg |
1.1 |
{ |
252 |
pcg |
1.49 |
slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
253 |
pcg |
1.54 |
return -1; |
254 |
pcg |
1.1 |
} |
255 |
|
|
|
256 |
pcg |
1.39 |
udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
257 |
pcg |
1.51 |
++success; |
258 |
pcg |
1.9 |
} |
259 |
pcg |
1.51 |
else |
260 |
|
|
THISNODE->protocols &= ~PROT_UDPv4; |
261 |
pcg |
1.9 |
|
262 |
pcg |
1.41 |
icmpv4_tos = -1; |
263 |
|
|
icmpv4_fd = -1; |
264 |
pcg |
1.9 |
|
265 |
|
|
#if ENABLE_ICMP |
266 |
|
|
if (THISNODE->protocols & PROT_ICMPv4) |
267 |
|
|
{ |
268 |
pcg |
1.54 |
icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP); |
269 |
pcg |
1.9 |
|
270 |
|
|
if (icmpv4_fd < 0) |
271 |
|
|
return -1; |
272 |
|
|
|
273 |
|
|
#ifdef ICMP_FILTER |
274 |
|
|
{ |
275 |
|
|
icmp_filter oval; |
276 |
|
|
oval.data = 0xffffffff; |
277 |
|
|
if (::conf.icmp_type < 32) |
278 |
|
|
oval.data &= ~(1 << ::conf.icmp_type); |
279 |
|
|
|
280 |
|
|
setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval); |
281 |
|
|
} |
282 |
|
|
#endif |
283 |
|
|
|
284 |
pcg |
1.14 |
#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
285 |
pcg |
1.1 |
// this I really consider a linux bug. I am neither connected |
286 |
|
|
// nor do I fragment myself. Linux still sets DF and doesn't |
287 |
|
|
// fragment for me sometimes. |
288 |
|
|
{ |
289 |
|
|
int oval = IP_PMTUDISC_DONT; |
290 |
pcg |
1.36 |
setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
291 |
pcg |
1.1 |
} |
292 |
|
|
#endif |
293 |
|
|
|
294 |
pcg |
1.9 |
sockinfo si (THISNODE, PROT_ICMPv4); |
295 |
|
|
|
296 |
|
|
if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
297 |
|
|
{ |
298 |
pcg |
1.49 |
slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
299 |
pcg |
1.54 |
return -1; |
300 |
pcg |
1.9 |
} |
301 |
|
|
|
302 |
pcg |
1.39 |
icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
303 |
pcg |
1.51 |
++success; |
304 |
pcg |
1.1 |
} |
305 |
pcg |
1.9 |
#endif |
306 |
pcg |
1.1 |
|
307 |
pcg |
1.8 |
tcpv4_fd = -1; |
308 |
|
|
|
309 |
pcg |
1.2 |
#if ENABLE_TCP |
310 |
pcg |
1.8 |
if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port) |
311 |
pcg |
1.2 |
{ |
312 |
pcg |
1.54 |
tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP); |
313 |
pcg |
1.2 |
|
314 |
|
|
if (tcpv4_fd < 0) |
315 |
|
|
return -1; |
316 |
|
|
|
317 |
pcg |
1.3 |
// standard daemon practise... |
318 |
|
|
{ |
319 |
|
|
int oval = 1; |
320 |
|
|
setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
321 |
|
|
} |
322 |
|
|
|
323 |
pcg |
1.2 |
sockinfo si (THISNODE, PROT_TCPv4); |
324 |
|
|
|
325 |
|
|
if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
326 |
|
|
{ |
327 |
pcg |
1.49 |
slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
328 |
pcg |
1.54 |
return -1; |
329 |
pcg |
1.2 |
} |
330 |
|
|
|
331 |
|
|
if (listen (tcpv4_fd, 5)) |
332 |
|
|
{ |
333 |
pcg |
1.49 |
slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
334 |
pcg |
1.54 |
return -1; |
335 |
pcg |
1.2 |
} |
336 |
|
|
|
337 |
pcg |
1.39 |
tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
338 |
pcg |
1.51 |
++success; |
339 |
pcg |
1.2 |
} |
340 |
pcg |
1.51 |
else |
341 |
|
|
THISNODE->protocols &= ~PROT_TCPv4; |
342 |
pcg |
1.2 |
#endif |
343 |
|
|
|
344 |
pcg |
1.41 |
dnsv4_tos = -1; |
345 |
|
|
dnsv4_fd = -1; |
346 |
|
|
|
347 |
pcg |
1.24 |
#if ENABLE_DNS |
348 |
|
|
if (THISNODE->protocols & PROT_DNSv4) |
349 |
|
|
{ |
350 |
pcg |
1.29 |
dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
351 |
|
|
|
352 |
pcg |
1.54 |
dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
353 |
pcg |
1.24 |
|
354 |
|
|
if (dnsv4_fd < 0) |
355 |
|
|
return -1; |
356 |
|
|
|
357 |
pcg |
1.35 |
# if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
358 |
pcg |
1.32 |
// this I really consider a linux bug. I am neither connected |
359 |
|
|
// nor do I fragment myself. Linux still sets DF and doesn't |
360 |
|
|
// fragment for me sometimes. |
361 |
|
|
{ |
362 |
|
|
int oval = IP_PMTUDISC_DONT; |
363 |
pcg |
1.35 |
setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
364 |
pcg |
1.32 |
} |
365 |
pcg |
1.35 |
# endif |
366 |
pcg |
1.32 |
|
367 |
pcg |
1.24 |
// standard daemon practise... |
368 |
|
|
{ |
369 |
|
|
int oval = 1; |
370 |
pcg |
1.31 |
setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
371 |
pcg |
1.24 |
} |
372 |
|
|
|
373 |
pcg |
1.31 |
sockinfo si (THISNODE->dns_hostname, |
374 |
|
|
THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
375 |
|
|
PROT_DNSv4); |
376 |
pcg |
1.24 |
|
377 |
|
|
if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
378 |
|
|
{ |
379 |
pcg |
1.49 |
slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
380 |
pcg |
1.54 |
return -1; |
381 |
pcg |
1.24 |
} |
382 |
|
|
|
383 |
pcg |
1.39 |
dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
384 |
pcg |
1.51 |
++success; |
385 |
pcg |
1.24 |
} |
386 |
|
|
#endif |
387 |
|
|
|
388 |
pcg |
1.34 |
///////////////////////////////////////////////////////////////////////////// |
389 |
|
|
|
390 |
pcg |
1.51 |
if (!success) |
391 |
|
|
{ |
392 |
pcg |
1.54 |
slog (L_ERR, _("no protocols enabled.")); |
393 |
|
|
return -1; |
394 |
pcg |
1.51 |
} |
395 |
|
|
|
396 |
pcg |
1.34 |
reconnect_all (); |
397 |
|
|
|
398 |
|
|
///////////////////////////////////////////////////////////////////////////// |
399 |
|
|
|
400 |
pcg |
1.1 |
tap = new tap_device (); |
401 |
|
|
if (!tap) //D this, of course, never catches |
402 |
|
|
{ |
403 |
pcg |
1.54 |
slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname); |
404 |
|
|
return -1; |
405 |
pcg |
1.1 |
} |
406 |
|
|
|
407 |
pcg |
1.37 |
fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
408 |
|
|
|
409 |
pcg |
1.43 |
run_script_cb cb; |
410 |
pcg |
1.44 |
cb.set<vpn, &vpn::script_if_init> (this); |
411 |
pcg |
1.43 |
|
412 |
pcg |
1.33 |
if (tap->if_up () && |
413 |
pcg |
1.43 |
!run_script (cb, true)) |
414 |
pcg |
1.33 |
{ |
415 |
pcg |
1.54 |
slog (L_ERR, _("interface initialization command '%s' failed."), |
416 |
pcg |
1.33 |
tap->if_up ()); |
417 |
pcg |
1.54 |
return -1; |
418 |
pcg |
1.33 |
} |
419 |
|
|
|
420 |
pcg |
1.44 |
cb.set<vpn, &vpn::script_if_up> (this); |
421 |
pcg |
1.43 |
if (!run_script (cb, true)) |
422 |
pcg |
1.33 |
{ |
423 |
pcg |
1.54 |
slog (L_ERR, _("if-up command execution failed.")); |
424 |
|
|
return -1; |
425 |
pcg |
1.33 |
} |
426 |
pcg |
1.1 |
|
427 |
pcg |
1.39 |
tap_ev_watcher.start (tap->fd, EV_READ); |
428 |
pcg |
1.1 |
|
429 |
|
|
return 0; |
430 |
|
|
} |
431 |
|
|
|
432 |
pcg |
1.7 |
bool |
433 |
pcg |
1.1 |
vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
434 |
|
|
{ |
435 |
pcg |
1.41 |
set_tos (ipv4_fd, ipv4_tos, tos); |
436 |
pcg |
1.1 |
sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
437 |
pcg |
1.7 |
|
438 |
|
|
return true; |
439 |
pcg |
1.1 |
} |
440 |
|
|
|
441 |
root |
1.62 |
#if 1 //D |
442 |
|
|
bool |
443 |
|
|
vpn::send_ipv42_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
444 |
|
|
{ |
445 |
|
|
set_tos (ipv42_fd, ipv42_tos, tos); |
446 |
|
|
sendto (ipv42_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
447 |
|
|
|
448 |
|
|
return true; |
449 |
|
|
} |
450 |
|
|
#endif |
451 |
|
|
|
452 |
pcg |
1.9 |
static u16 |
453 |
|
|
ipv4_checksum (u16 *data, unsigned int len) |
454 |
|
|
{ |
455 |
|
|
// use 32 bit accumulator and fold back carry bits at the end |
456 |
|
|
u32 sum = 0; |
457 |
|
|
|
458 |
|
|
while (len > 1) |
459 |
|
|
{ |
460 |
|
|
sum += *data++; |
461 |
|
|
len -= 2; |
462 |
|
|
} |
463 |
|
|
|
464 |
|
|
// odd byte left? |
465 |
|
|
if (len) |
466 |
|
|
sum += *(u8 *)data; |
467 |
|
|
|
468 |
|
|
// add back carry bits |
469 |
|
|
sum = (sum >> 16) + (sum & 0xffff); // lo += hi |
470 |
|
|
sum += (sum >> 16); // carry |
471 |
|
|
|
472 |
|
|
return ~sum; |
473 |
|
|
} |
474 |
|
|
|
475 |
pcg |
1.13 |
#if ENABLE_ICMP |
476 |
pcg |
1.9 |
bool |
477 |
|
|
vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
478 |
|
|
{ |
479 |
|
|
pkt->unshift_hdr (4); |
480 |
|
|
|
481 |
pcg |
1.14 |
icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
482 |
pcg |
1.9 |
hdr->type = ::conf.icmp_type; |
483 |
|
|
hdr->code = 255; |
484 |
|
|
hdr->checksum = 0; |
485 |
|
|
hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
486 |
|
|
|
487 |
pcg |
1.41 |
set_tos (icmpv4_fd, icmpv4_tos, tos); |
488 |
pcg |
1.9 |
sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
489 |
|
|
|
490 |
|
|
return true; |
491 |
|
|
} |
492 |
pcg |
1.13 |
#endif |
493 |
pcg |
1.9 |
|
494 |
pcg |
1.7 |
bool |
495 |
pcg |
1.1 |
vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
496 |
|
|
{ |
497 |
pcg |
1.41 |
set_tos (udpv4_fd, udpv4_tos, tos); |
498 |
pcg |
1.1 |
sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
499 |
pcg |
1.7 |
|
500 |
|
|
return true; |
501 |
pcg |
1.1 |
} |
502 |
|
|
|
503 |
|
|
void |
504 |
pcg |
1.18 |
vpn::inject_data_packet (tap_packet *pkt, int dst) |
505 |
|
|
{ |
506 |
|
|
if (dst) |
507 |
|
|
{ |
508 |
|
|
// unicast |
509 |
|
|
if (dst != THISNODE->id) |
510 |
|
|
conns[dst - 1]->inject_data_packet (pkt); |
511 |
|
|
} |
512 |
|
|
else |
513 |
|
|
{ |
514 |
|
|
// broadcast, this is ugly, but due to the security policy |
515 |
|
|
// we have to connect to all hosts... |
516 |
|
|
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
517 |
|
|
if ((*c)->conf != THISNODE) |
518 |
pcg |
1.46 |
(*c)->inject_data_packet (pkt); |
519 |
pcg |
1.18 |
} |
520 |
|
|
} |
521 |
|
|
|
522 |
|
|
void |
523 |
pcg |
1.1 |
vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
524 |
|
|
{ |
525 |
|
|
unsigned int src = pkt->src (); |
526 |
|
|
unsigned int dst = pkt->dst (); |
527 |
|
|
|
528 |
pcg |
1.49 |
slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."), |
529 |
pcg |
1.1 |
(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
530 |
|
|
|
531 |
|
|
if (src == 0 || src > conns.size () |
532 |
|
|
|| dst > conns.size () |
533 |
|
|
|| pkt->typ () >= vpn_packet::PT_MAX) |
534 |
pcg |
1.49 |
slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
535 |
pcg |
1.1 |
(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
536 |
|
|
else |
537 |
|
|
{ |
538 |
|
|
connection *c = conns[src - 1]; |
539 |
|
|
|
540 |
pcg |
1.13 |
if (dst == 0) |
541 |
pcg |
1.49 |
slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."), |
542 |
pcg |
1.1 |
c->conf->nodename, (const char *)rsi); |
543 |
pcg |
1.18 |
else if (dst != THISNODE->id) |
544 |
pcg |
1.6 |
{ |
545 |
|
|
if (THISNODE->routerprio) |
546 |
|
|
// the tos setting gets lost here. who cares. |
547 |
|
|
conns[dst - 1]->inject_vpn_packet (pkt); |
548 |
|
|
else |
549 |
|
|
slog (L_WARN, |
550 |
pcg |
1.49 |
_("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."), |
551 |
pcg |
1.6 |
c->conf->nodename, (const char *)rsi, |
552 |
|
|
conns[dst - 1]->conf->nodename); |
553 |
|
|
} |
554 |
pcg |
1.1 |
else |
555 |
|
|
c->recv_vpn_packet (pkt, rsi); |
556 |
|
|
} |
557 |
|
|
} |
558 |
|
|
|
559 |
pcg |
1.31 |
bool |
560 |
|
|
vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
561 |
|
|
{ |
562 |
|
|
switch (si.prot) |
563 |
|
|
{ |
564 |
root |
1.62 |
#if 1//D2 |
565 |
|
|
case PROT_IPv42: |
566 |
|
|
return send_ipv42_packet (pkt, si, tos); |
567 |
|
|
#endif |
568 |
|
|
|
569 |
pcg |
1.31 |
case PROT_IPv4: |
570 |
|
|
return send_ipv4_packet (pkt, si, tos); |
571 |
pcg |
1.41 |
|
572 |
pcg |
1.31 |
case PROT_UDPv4: |
573 |
|
|
return send_udpv4_packet (pkt, si, tos); |
574 |
pcg |
1.41 |
|
575 |
root |
1.57 |
#if ENABLE_TCP |
576 |
pcg |
1.31 |
case PROT_TCPv4: |
577 |
|
|
return send_tcpv4_packet (pkt, si, tos); |
578 |
|
|
#endif |
579 |
|
|
#if ENABLE_ICMP |
580 |
|
|
case PROT_ICMPv4: |
581 |
|
|
return send_icmpv4_packet (pkt, si, tos); |
582 |
|
|
#endif |
583 |
|
|
#if ENABLE_DNS |
584 |
|
|
case PROT_DNSv4: |
585 |
|
|
return send_dnsv4_packet (pkt, si, tos); |
586 |
|
|
#endif |
587 |
|
|
default: |
588 |
pcg |
1.49 |
slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
589 |
pcg |
1.31 |
} |
590 |
|
|
|
591 |
|
|
return false; |
592 |
|
|
} |
593 |
|
|
|
594 |
root |
1.62 |
#if 1//D2 |
595 |
|
|
inline void |
596 |
|
|
vpn::ipv42_ev (ev::io &w, int revents) |
597 |
|
|
{ |
598 |
|
|
if (revents & EV_READ) |
599 |
|
|
{ |
600 |
|
|
vpn_packet *pkt = new vpn_packet; |
601 |
|
|
struct sockaddr_in sa; |
602 |
|
|
socklen_t sa_len = sizeof (sa); |
603 |
|
|
int len; |
604 |
|
|
|
605 |
|
|
len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); |
606 |
|
|
|
607 |
|
|
sockinfo si(sa, PROT_IPv42); |
608 |
|
|
|
609 |
|
|
if (len > 0) |
610 |
|
|
{ |
611 |
|
|
pkt->len = len; |
612 |
|
|
|
613 |
|
|
// raw sockets deliver the ipv4 header, but don't expect it on sends |
614 |
|
|
pkt->skip_hdr (pkt->ipv4_hdr_len ()); |
615 |
|
|
|
616 |
|
|
recv_vpn_packet (pkt, si); |
617 |
|
|
} |
618 |
|
|
else |
619 |
|
|
{ |
620 |
|
|
// probably ECONNRESET or somesuch |
621 |
|
|
slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
622 |
|
|
} |
623 |
|
|
|
624 |
|
|
delete pkt; |
625 |
|
|
} |
626 |
|
|
else |
627 |
|
|
{ |
628 |
|
|
slog (L_ERR, |
629 |
|
|
_("FATAL: unknown revents %08x in socket, exiting.\n"), |
630 |
|
|
revents); |
631 |
|
|
exit (EXIT_FAILURE); |
632 |
|
|
} |
633 |
|
|
} |
634 |
|
|
#endif |
635 |
|
|
|
636 |
pcg |
1.45 |
inline void |
637 |
pcg |
1.39 |
vpn::ipv4_ev (ev::io &w, int revents) |
638 |
pcg |
1.1 |
{ |
639 |
pcg |
1.39 |
if (revents & EV_READ) |
640 |
pcg |
1.1 |
{ |
641 |
|
|
vpn_packet *pkt = new vpn_packet; |
642 |
|
|
struct sockaddr_in sa; |
643 |
|
|
socklen_t sa_len = sizeof (sa); |
644 |
|
|
int len; |
645 |
|
|
|
646 |
pcg |
1.5 |
len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); |
647 |
pcg |
1.1 |
|
648 |
pcg |
1.9 |
sockinfo si(sa, PROT_IPv4); |
649 |
pcg |
1.1 |
|
650 |
|
|
if (len > 0) |
651 |
|
|
{ |
652 |
|
|
pkt->len = len; |
653 |
|
|
|
654 |
pcg |
1.30 |
// raw sockets deliver the ipv4 header, but don't expect it on sends |
655 |
root |
1.60 |
pkt->skip_hdr (pkt->ipv4_hdr_len ()); |
656 |
pcg |
1.9 |
|
657 |
pcg |
1.1 |
recv_vpn_packet (pkt, si); |
658 |
|
|
} |
659 |
|
|
else |
660 |
|
|
{ |
661 |
|
|
// probably ECONNRESET or somesuch |
662 |
pcg |
1.49 |
slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
663 |
pcg |
1.1 |
} |
664 |
|
|
|
665 |
|
|
delete pkt; |
666 |
|
|
} |
667 |
|
|
else |
668 |
|
|
{ |
669 |
|
|
slog (L_ERR, |
670 |
pcg |
1.49 |
_("FATAL: unknown revents %08x in socket, exiting.\n"), |
671 |
pcg |
1.30 |
revents); |
672 |
pcg |
1.23 |
exit (EXIT_FAILURE); |
673 |
pcg |
1.1 |
} |
674 |
|
|
} |
675 |
|
|
|
676 |
pcg |
1.13 |
#if ENABLE_ICMP |
677 |
pcg |
1.45 |
inline void |
678 |
pcg |
1.39 |
vpn::icmpv4_ev (ev::io &w, int revents) |
679 |
pcg |
1.1 |
{ |
680 |
pcg |
1.39 |
if (revents & EV_READ) |
681 |
pcg |
1.1 |
{ |
682 |
|
|
vpn_packet *pkt = new vpn_packet; |
683 |
|
|
struct sockaddr_in sa; |
684 |
|
|
socklen_t sa_len = sizeof (sa); |
685 |
|
|
int len; |
686 |
|
|
|
687 |
pcg |
1.5 |
len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); |
688 |
pcg |
1.1 |
|
689 |
pcg |
1.9 |
sockinfo si(sa, PROT_ICMPv4); |
690 |
pcg |
1.1 |
|
691 |
|
|
if (len > 0) |
692 |
|
|
{ |
693 |
|
|
pkt->len = len; |
694 |
|
|
|
695 |
pcg |
1.14 |
icmp_header *hdr = (icmp_header *)&((*pkt)[IP_OVERHEAD]); |
696 |
pcg |
1.9 |
|
697 |
|
|
if (hdr->type == ::conf.icmp_type |
698 |
|
|
&& hdr->code == 255) |
699 |
|
|
{ |
700 |
|
|
// raw sockets deliver the ipv4, but don't expect it on sends |
701 |
|
|
// this is slow, but... |
702 |
root |
1.60 |
pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD)); |
703 |
pcg |
1.9 |
|
704 |
|
|
recv_vpn_packet (pkt, si); |
705 |
|
|
} |
706 |
|
|
} |
707 |
|
|
else |
708 |
|
|
{ |
709 |
|
|
// probably ECONNRESET or somesuch |
710 |
pcg |
1.49 |
slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
711 |
pcg |
1.9 |
} |
712 |
|
|
|
713 |
|
|
delete pkt; |
714 |
|
|
} |
715 |
|
|
else |
716 |
|
|
{ |
717 |
|
|
slog (L_ERR, |
718 |
pcg |
1.49 |
_("FATAL: unknown revents %08x in socket, exiting.\n"), |
719 |
pcg |
1.9 |
revents); |
720 |
pcg |
1.23 |
exit (EXIT_FAILURE); |
721 |
pcg |
1.9 |
} |
722 |
|
|
} |
723 |
pcg |
1.13 |
#endif |
724 |
pcg |
1.9 |
|
725 |
pcg |
1.45 |
inline void |
726 |
pcg |
1.39 |
vpn::udpv4_ev (ev::io &w, int revents) |
727 |
pcg |
1.9 |
{ |
728 |
pcg |
1.39 |
if (revents & EV_READ) |
729 |
pcg |
1.9 |
{ |
730 |
|
|
vpn_packet *pkt = new vpn_packet; |
731 |
|
|
struct sockaddr_in sa; |
732 |
|
|
socklen_t sa_len = sizeof (sa); |
733 |
|
|
int len; |
734 |
|
|
|
735 |
|
|
len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); |
736 |
|
|
|
737 |
|
|
sockinfo si(sa, PROT_UDPv4); |
738 |
|
|
|
739 |
|
|
if (len > 0) |
740 |
|
|
{ |
741 |
|
|
pkt->len = len; |
742 |
pcg |
1.1 |
|
743 |
|
|
recv_vpn_packet (pkt, si); |
744 |
|
|
} |
745 |
|
|
else |
746 |
|
|
{ |
747 |
|
|
// probably ECONNRESET or somesuch |
748 |
pcg |
1.49 |
slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno)); |
749 |
pcg |
1.1 |
} |
750 |
|
|
|
751 |
|
|
delete pkt; |
752 |
|
|
} |
753 |
|
|
else |
754 |
|
|
{ |
755 |
|
|
slog (L_ERR, |
756 |
pcg |
1.49 |
_("FATAL: unknown revents %08x in socket, exiting.\n"), |
757 |
pcg |
1.1 |
revents); |
758 |
pcg |
1.23 |
exit (EXIT_FAILURE); |
759 |
pcg |
1.1 |
} |
760 |
|
|
} |
761 |
pcg |
1.2 |
|
762 |
pcg |
1.45 |
inline void |
763 |
pcg |
1.39 |
vpn::tap_ev (ev::io &w, int revents) |
764 |
pcg |
1.1 |
{ |
765 |
pcg |
1.39 |
if (revents & EV_READ) |
766 |
pcg |
1.1 |
{ |
767 |
|
|
/* process data */ |
768 |
|
|
tap_packet *pkt; |
769 |
|
|
|
770 |
|
|
pkt = tap->recv (); |
771 |
|
|
|
772 |
pcg |
1.17 |
if (!pkt) |
773 |
|
|
return; |
774 |
pcg |
1.1 |
|
775 |
pcg |
1.17 |
if (pkt->len > 14) |
776 |
pcg |
1.1 |
{ |
777 |
pcg |
1.17 |
int dst = mac2id (pkt->dst); |
778 |
|
|
int src = mac2id (pkt->src); |
779 |
pcg |
1.1 |
|
780 |
pcg |
1.17 |
if (src != THISNODE->id) |
781 |
|
|
{ |
782 |
pcg |
1.30 |
slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
783 |
pcg |
1.23 |
exit (EXIT_FAILURE); |
784 |
pcg |
1.17 |
} |
785 |
pcg |
1.1 |
|
786 |
pcg |
1.17 |
if (dst == THISNODE->id) |
787 |
pcg |
1.1 |
{ |
788 |
pcg |
1.17 |
slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
789 |
pcg |
1.23 |
exit (EXIT_FAILURE); |
790 |
pcg |
1.1 |
} |
791 |
pcg |
1.17 |
|
792 |
|
|
if (dst > conns.size ()) |
793 |
|
|
slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
794 |
pcg |
1.1 |
else |
795 |
pcg |
1.18 |
inject_data_packet (pkt, dst); |
796 |
pcg |
1.1 |
} |
797 |
|
|
|
798 |
|
|
delete pkt; |
799 |
|
|
} |
800 |
|
|
else |
801 |
|
|
abort (); |
802 |
|
|
} |
803 |
|
|
|
804 |
pcg |
1.45 |
inline void |
805 |
pcg |
1.39 |
vpn::event_cb (ev::timer &w, int) |
806 |
pcg |
1.1 |
{ |
807 |
|
|
if (events) |
808 |
|
|
{ |
809 |
|
|
if (events & EVENT_SHUTDOWN) |
810 |
|
|
{ |
811 |
|
|
slog (L_INFO, _("preparing shutdown...")); |
812 |
|
|
|
813 |
|
|
shutdown_all (); |
814 |
pcg |
1.24 |
remove_pid (conf.pidfilename); |
815 |
pcg |
1.49 |
slog (L_INFO, _("exiting.")); |
816 |
pcg |
1.23 |
exit (EXIT_SUCCESS); |
817 |
pcg |
1.1 |
} |
818 |
|
|
|
819 |
|
|
if (events & EVENT_RECONNECT) |
820 |
|
|
{ |
821 |
pcg |
1.49 |
slog (L_INFO, _("forced reconnect.")); |
822 |
pcg |
1.1 |
|
823 |
|
|
reconnect_all (); |
824 |
|
|
} |
825 |
|
|
|
826 |
|
|
events = 0; |
827 |
|
|
} |
828 |
|
|
} |
829 |
|
|
|
830 |
|
|
void |
831 |
|
|
vpn::shutdown_all () |
832 |
|
|
{ |
833 |
|
|
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
834 |
|
|
(*c)->shutdown (); |
835 |
|
|
} |
836 |
|
|
|
837 |
|
|
void |
838 |
|
|
vpn::reconnect_all () |
839 |
|
|
{ |
840 |
|
|
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
841 |
|
|
delete *c; |
842 |
|
|
|
843 |
|
|
conns.clear (); |
844 |
|
|
|
845 |
|
|
connection_init (); |
846 |
|
|
|
847 |
pcg |
1.50 |
for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i) |
848 |
|
|
conns.push_back (new connection (this, *i)); |
849 |
|
|
|
850 |
|
|
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
851 |
|
|
(*c)->establish_connection (); |
852 |
pcg |
1.1 |
} |
853 |
|
|
|
854 |
root |
1.56 |
bool |
855 |
|
|
vpn::can_direct (conf_node *src, conf_node *dst) const |
856 |
pcg |
1.49 |
{ |
857 |
|
|
return src != dst |
858 |
|
|
&& src->may_direct (dst) |
859 |
|
|
&& dst->may_direct (src) |
860 |
|
|
&& (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS) |
861 |
|
|
|| (src->protocols & dst->connectable_protocols ())); |
862 |
|
|
} |
863 |
|
|
|
864 |
|
|
// only works for indirect and routed connections: find a router |
865 |
|
|
// from THISNODE to dst |
866 |
root |
1.56 |
connection * |
867 |
|
|
vpn::find_router_for (const connection *dst) |
868 |
pcg |
1.1 |
{ |
869 |
|
|
connection *router = 0; |
870 |
|
|
|
871 |
pcg |
1.52 |
// first try to find a router with a direct connection, route there |
872 |
|
|
// regardless of any other considerations. |
873 |
pcg |
1.49 |
{ |
874 |
|
|
u32 prio = 1; |
875 |
|
|
|
876 |
|
|
for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
877 |
|
|
{ |
878 |
|
|
connection *c = *i; |
879 |
|
|
|
880 |
|
|
if (c->conf->routerprio > prio |
881 |
|
|
&& c->conf != THISNODE |
882 |
pcg |
1.52 |
&& can_direct (c->conf, dst->conf) |
883 |
|
|
&& c->ictx && c->octx) |
884 |
pcg |
1.49 |
{ |
885 |
pcg |
1.52 |
prio = c->conf->routerprio; |
886 |
|
|
router = c; |
887 |
pcg |
1.49 |
} |
888 |
|
|
} |
889 |
|
|
} |
890 |
|
|
|
891 |
|
|
if (router) |
892 |
|
|
return router; |
893 |
|
|
|
894 |
pcg |
1.52 |
// second try find the router with the highest priority, higher than ours |
895 |
pcg |
1.49 |
{ |
896 |
pcg |
1.52 |
u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1; |
897 |
pcg |
1.49 |
|
898 |
|
|
for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
899 |
|
|
{ |
900 |
|
|
connection *c = *i; |
901 |
|
|
|
902 |
|
|
if (c->conf->routerprio > prio |
903 |
|
|
&& c != dst |
904 |
pcg |
1.52 |
&& c->conf != THISNODE |
905 |
|
|
&& c->ictx && c->octx) |
906 |
pcg |
1.49 |
{ |
907 |
pcg |
1.52 |
prio = c->conf->routerprio; |
908 |
|
|
router = c; |
909 |
pcg |
1.49 |
} |
910 |
|
|
} |
911 |
|
|
} |
912 |
pcg |
1.52 |
|
913 |
pcg |
1.49 |
return router; |
914 |
|
|
} |
915 |
|
|
|
916 |
root |
1.56 |
void |
917 |
|
|
vpn::connection_established (connection *c) |
918 |
pcg |
1.49 |
{ |
919 |
pcg |
1.1 |
for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
920 |
|
|
{ |
921 |
pcg |
1.49 |
connection *o = *i; |
922 |
pcg |
1.1 |
|
923 |
pcg |
1.49 |
if (!o->is_direct |
924 |
|
|
&& o->si.valid () |
925 |
|
|
&& c->si != o->si |
926 |
|
|
&& c == find_router_for (o)) |
927 |
|
|
{ |
928 |
|
|
slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."), |
929 |
|
|
o->conf->nodename, c->conf->nodename); |
930 |
|
|
o->rekey (); |
931 |
pcg |
1.1 |
} |
932 |
|
|
} |
933 |
|
|
} |
934 |
|
|
|
935 |
root |
1.56 |
void |
936 |
|
|
vpn::send_connect_request (connection *c) |
937 |
pcg |
1.1 |
{ |
938 |
pcg |
1.50 |
connection *r = find_router_for (c); |
939 |
pcg |
1.1 |
|
940 |
pcg |
1.50 |
if (r) |
941 |
pcg |
1.49 |
{ |
942 |
pcg |
1.53 |
slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."), |
943 |
pcg |
1.50 |
c->conf->nodename, r->conf->nodename); |
944 |
|
|
r->send_connect_request (c->conf->id); |
945 |
pcg |
1.49 |
} |
946 |
pcg |
1.7 |
else |
947 |
pcg |
1.53 |
slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."), |
948 |
pcg |
1.50 |
c->conf->nodename); |
949 |
pcg |
1.1 |
} |
950 |
|
|
|
951 |
|
|
void |
952 |
|
|
connection::dump_status () |
953 |
|
|
{ |
954 |
|
|
slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
955 |
|
|
slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
956 |
|
|
connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
957 |
|
|
slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
958 |
|
|
(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
959 |
|
|
} |
960 |
|
|
|
961 |
|
|
void |
962 |
|
|
vpn::dump_status () |
963 |
|
|
{ |
964 |
pcg |
1.40 |
slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ()); |
965 |
pcg |
1.1 |
|
966 |
|
|
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
967 |
|
|
(*c)->dump_status (); |
968 |
|
|
|
969 |
|
|
slog (L_NOTICE, _("END status dump")); |
970 |
|
|
} |
971 |
|
|
|
972 |
|
|
vpn::vpn (void) |
973 |
pcg |
1.44 |
{ |
974 |
|
|
event .set<vpn, &vpn::event_cb > (this); |
975 |
|
|
udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
976 |
|
|
ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
977 |
root |
1.62 |
#if 1//D2 |
978 |
|
|
ipv42_ev_watcher .set<vpn, &vpn::ipv42_ev > (this); |
979 |
|
|
#endif |
980 |
pcg |
1.2 |
#if ENABLE_TCP |
981 |
pcg |
1.44 |
tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
982 |
pcg |
1.9 |
#endif |
983 |
|
|
#if ENABLE_ICMP |
984 |
pcg |
1.44 |
icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |
985 |
pcg |
1.24 |
#endif |
986 |
|
|
#if ENABLE_DNS |
987 |
pcg |
1.44 |
dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this); |
988 |
pcg |
1.2 |
#endif |
989 |
pcg |
1.44 |
tap_ev_watcher .set<vpn, &vpn::tap_ev > (this); |
990 |
pcg |
1.1 |
} |
991 |
|
|
|
992 |
|
|
vpn::~vpn () |
993 |
|
|
{ |
994 |
|
|
} |
995 |
|
|
|