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) 2003-2005 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 |
6 | it under the terms of the GNU General Public License as published by |
8 | it under the terms of the GNU General Public License as published by |
7 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
8 | (at your option) any later version. |
10 | (at your 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, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but 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 |
13 | GNU General Public License for more details. |
15 | GNU General 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 |
16 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
18 | */ |
20 | */ |
19 | |
21 | |
20 | #include "config.h" |
22 | #include "config.h" |
21 | |
23 | |
22 | #include <list> |
24 | #include <list> |
23 | |
25 | |
|
|
26 | #include <cstdio> |
|
|
27 | #include <cstring> |
24 | #include <cstdlib> |
28 | #include <cstdlib> |
25 | #include <cstring> |
|
|
26 | #include <cstdio> |
|
|
27 | |
29 | |
28 | #include <sys/types.h> |
30 | #include <sys/types.h> |
29 | #include <sys/socket.h> |
31 | #include <sys/socket.h> |
30 | #include <sys/wait.h> |
32 | #include <sys/wait.h> |
31 | #include <errno.h> |
33 | #include <errno.h> |
… | |
… | |
44 | |
46 | |
45 | vpn network; // THE vpn (bad design...) |
47 | vpn network; // THE vpn (bad design...) |
46 | |
48 | |
47 | ///////////////////////////////////////////////////////////////////////////// |
49 | ///////////////////////////////////////////////////////////////////////////// |
48 | |
50 | |
49 | const char *vpn::script_if_up () |
51 | void |
|
|
52 | vpn::script_init_env () |
50 | { |
53 | { |
51 | // the tunnel device mtu should be the physical mtu - overhead |
54 | // the tunnel device mtu should be the physical mtu - overhead |
52 | // the tricky part is rounding to the cipher key blocksize |
55 | // the tricky part is rounding to the cipher key blocksize |
53 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
56 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
54 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
57 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
55 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
58 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
56 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
59 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
57 | |
60 | |
58 | char *env; |
61 | char *env; |
59 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
62 | 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); |
63 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
63 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
64 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
64 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
65 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
65 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
66 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
66 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
67 | asprintf (&env, "NODES=%d", conns.size ()); putenv (env); |
67 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
68 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
68 | THISNODE->id & 0xff); |
|
|
69 | putenv (env); |
|
|
70 | |
69 | |
|
|
70 | conns [THISNODE->id - 1]->script_init_env (""); |
|
|
71 | |
|
|
72 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
|
|
73 | { |
|
|
74 | char ext[16]; |
|
|
75 | snprintf (ext, 16, "_%d", (*c)->conf->id); |
|
|
76 | (*c)->script_init_env (ext); |
|
|
77 | } |
|
|
78 | } |
|
|
79 | |
|
|
80 | const char *vpn::script_if_init () |
|
|
81 | { |
|
|
82 | script_init_env (); |
|
|
83 | |
|
|
84 | return tap->if_up (); |
|
|
85 | } |
|
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86 | |
|
|
87 | const char *vpn::script_if_up () |
|
|
88 | { |
|
|
89 | script_init_env (); |
|
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90 | |
|
|
91 | char *filename; |
|
|
92 | asprintf (&filename, |
|
|
93 | "%s/%s", |
|
|
94 | confbase, |
71 | return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; |
95 | ::conf.script_if_up ? ::conf.script_if_up : "if-up"); |
|
|
96 | |
|
|
97 | return filename; |
72 | } |
98 | } |
73 | |
99 | |
74 | int |
100 | int |
75 | vpn::setup () |
101 | vpn::setup () |
76 | { |
102 | { |
… | |
… | |
82 | |
108 | |
83 | if (ipv4_fd < 0) |
109 | if (ipv4_fd < 0) |
84 | return -1; |
110 | return -1; |
85 | |
111 | |
86 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
112 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
|
|
113 | fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC); |
87 | |
114 | |
88 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
115 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
89 | // this I really consider a linux bug. I am neither connected |
116 | // this I really consider a linux bug. I am neither connected |
90 | // nor do I fragment myself. Linux still sets DF and doesn't |
117 | // nor do I fragment myself. Linux still sets DF and doesn't |
91 | // fragment for me sometimes. |
118 | // fragment for me sometimes. |
… | |
… | |
98 | sockinfo si (THISNODE, PROT_IPv4); |
125 | sockinfo si (THISNODE, PROT_IPv4); |
99 | |
126 | |
100 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
127 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
101 | { |
128 | { |
102 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
129 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
103 | exit (1); |
130 | exit (EXIT_FAILURE); |
104 | } |
131 | } |
105 | |
132 | |
106 | ipv4_ev_watcher.start (ipv4_fd, POLLIN); |
133 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
107 | } |
134 | } |
108 | |
135 | |
109 | udpv4_fd = -1; |
136 | udpv4_fd = -1; |
110 | |
137 | |
111 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
138 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
… | |
… | |
114 | |
141 | |
115 | if (udpv4_fd < 0) |
142 | if (udpv4_fd < 0) |
116 | return -1; |
143 | return -1; |
117 | |
144 | |
118 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
145 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
146 | fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC); |
119 | |
147 | |
120 | // standard daemon practise... |
148 | // standard daemon practise... |
121 | { |
149 | { |
122 | int oval = 1; |
150 | int oval = 1; |
123 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
151 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
136 | sockinfo si (THISNODE, PROT_UDPv4); |
164 | sockinfo si (THISNODE, PROT_UDPv4); |
137 | |
165 | |
138 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
166 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
139 | { |
167 | { |
140 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
168 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
141 | exit (1); |
169 | exit (EXIT_FAILURE); |
142 | } |
170 | } |
143 | |
171 | |
144 | udpv4_ev_watcher.start (udpv4_fd, POLLIN); |
172 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
145 | } |
173 | } |
146 | |
174 | |
147 | icmpv4_fd = -1; |
175 | icmpv4_fd = -1; |
148 | |
176 | |
149 | #if ENABLE_ICMP |
177 | #if ENABLE_ICMP |
… | |
… | |
153 | |
181 | |
154 | if (icmpv4_fd < 0) |
182 | if (icmpv4_fd < 0) |
155 | return -1; |
183 | return -1; |
156 | |
184 | |
157 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
185 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
186 | fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC); |
158 | |
187 | |
159 | #ifdef ICMP_FILTER |
188 | #ifdef ICMP_FILTER |
160 | { |
189 | { |
161 | icmp_filter oval; |
190 | icmp_filter oval; |
162 | oval.data = 0xffffffff; |
191 | oval.data = 0xffffffff; |
… | |
… | |
171 | // this I really consider a linux bug. I am neither connected |
200 | // this I really consider a linux bug. I am neither connected |
172 | // nor do I fragment myself. Linux still sets DF and doesn't |
201 | // nor do I fragment myself. Linux still sets DF and doesn't |
173 | // fragment for me sometimes. |
202 | // fragment for me sometimes. |
174 | { |
203 | { |
175 | int oval = IP_PMTUDISC_DONT; |
204 | int oval = IP_PMTUDISC_DONT; |
176 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
205 | setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
177 | } |
206 | } |
178 | #endif |
207 | #endif |
179 | |
208 | |
180 | sockinfo si (THISNODE, PROT_ICMPv4); |
209 | sockinfo si (THISNODE, PROT_ICMPv4); |
181 | |
210 | |
182 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
211 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
183 | { |
212 | { |
184 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
213 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
185 | exit (1); |
214 | exit (EXIT_FAILURE); |
186 | } |
215 | } |
187 | |
216 | |
188 | icmpv4_ev_watcher.start (icmpv4_fd, POLLIN); |
217 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
189 | } |
218 | } |
190 | #endif |
219 | #endif |
191 | |
220 | |
192 | tcpv4_fd = -1; |
221 | tcpv4_fd = -1; |
193 | |
222 | |
… | |
… | |
198 | |
227 | |
199 | if (tcpv4_fd < 0) |
228 | if (tcpv4_fd < 0) |
200 | return -1; |
229 | return -1; |
201 | |
230 | |
202 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
231 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
|
|
232 | fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC); |
203 | |
233 | |
204 | // standard daemon practise... |
234 | // standard daemon practise... |
205 | { |
235 | { |
206 | int oval = 1; |
236 | int oval = 1; |
207 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
237 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
210 | sockinfo si (THISNODE, PROT_TCPv4); |
240 | sockinfo si (THISNODE, PROT_TCPv4); |
211 | |
241 | |
212 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
242 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
213 | { |
243 | { |
214 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
244 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
215 | exit (1); |
245 | exit (EXIT_FAILURE); |
216 | } |
246 | } |
217 | |
247 | |
218 | if (listen (tcpv4_fd, 5)) |
248 | if (listen (tcpv4_fd, 5)) |
219 | { |
249 | { |
220 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
250 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
221 | exit (1); |
251 | exit (EXIT_FAILURE); |
|
|
252 | } |
|
|
253 | |
|
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254 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
|
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255 | } |
|
|
256 | #endif |
|
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257 | |
|
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258 | #if ENABLE_DNS |
|
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259 | if (THISNODE->protocols & PROT_DNSv4) |
|
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260 | { |
|
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261 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
|
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262 | |
|
|
263 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
|
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264 | |
|
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265 | if (dnsv4_fd < 0) |
|
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266 | return -1; |
|
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267 | |
|
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268 | fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK); |
|
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269 | fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC); |
|
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270 | |
|
|
271 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
|
|
272 | // this I really consider a linux bug. I am neither connected |
|
|
273 | // nor do I fragment myself. Linux still sets DF and doesn't |
|
|
274 | // fragment for me sometimes. |
|
|
275 | { |
|
|
276 | int oval = IP_PMTUDISC_DONT; |
|
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277 | setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
222 | } |
278 | } |
223 | |
|
|
224 | tcpv4_ev_watcher.start (tcpv4_fd, POLLIN); |
|
|
225 | } |
|
|
226 | #endif |
279 | # endif |
|
|
280 | |
|
|
281 | // standard daemon practise... |
|
|
282 | { |
|
|
283 | int oval = 1; |
|
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284 | setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
|
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285 | } |
|
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286 | |
|
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287 | sockinfo si (THISNODE->dns_hostname, |
|
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288 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
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289 | PROT_DNSv4); |
|
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290 | |
|
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291 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
|
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292 | { |
|
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293 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
|
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294 | exit (EXIT_FAILURE); |
|
|
295 | } |
|
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296 | |
|
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297 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
|
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298 | } |
|
|
299 | #endif |
|
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300 | |
|
|
301 | ///////////////////////////////////////////////////////////////////////////// |
|
|
302 | |
|
|
303 | reconnect_all (); |
|
|
304 | |
|
|
305 | ///////////////////////////////////////////////////////////////////////////// |
227 | |
306 | |
228 | tap = new tap_device (); |
307 | tap = new tap_device (); |
229 | if (!tap) //D this, of course, never catches |
308 | if (!tap) //D this, of course, never catches |
230 | { |
309 | { |
231 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
310 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
232 | exit (1); |
311 | exit (EXIT_FAILURE); |
233 | } |
312 | } |
234 | |
313 | |
|
|
314 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
|
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315 | |
|
|
316 | if (tap->if_up () && |
|
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317 | !run_script (run_script_cb (this, &vpn::script_if_init), true)) |
|
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318 | { |
|
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319 | slog (L_ERR, _("interface initialization command '%s' failed, exiting."), |
|
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320 | tap->if_up ()); |
|
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321 | exit (EXIT_FAILURE); |
|
|
322 | } |
|
|
323 | |
235 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
324 | if (!run_script (run_script_cb (this, &vpn::script_if_up), true)) |
|
|
325 | { |
|
|
326 | slog (L_ERR, _("if-up command execution failed, exiting.")); |
|
|
327 | exit (EXIT_FAILURE); |
|
|
328 | } |
236 | |
329 | |
237 | tap_ev_watcher.start (tap->fd, POLLIN); |
330 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
238 | |
|
|
239 | reconnect_all (); |
|
|
240 | |
331 | |
241 | return 0; |
332 | return 0; |
242 | } |
|
|
243 | |
|
|
244 | // send a vpn packet out to other hosts |
|
|
245 | bool |
|
|
246 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
247 | { |
|
|
248 | switch (si.prot) |
|
|
249 | { |
|
|
250 | case PROT_IPv4: |
|
|
251 | return send_ipv4_packet (pkt, si, tos); |
|
|
252 | |
|
|
253 | case PROT_UDPv4: |
|
|
254 | return send_udpv4_packet (pkt, si, tos); |
|
|
255 | |
|
|
256 | #if ENABLE_TCP |
|
|
257 | case PROT_TCPv4: |
|
|
258 | return send_tcpv4_packet (pkt, si, tos); |
|
|
259 | #endif |
|
|
260 | |
|
|
261 | #if ENABLE_ICMP |
|
|
262 | case PROT_ICMPv4: |
|
|
263 | return send_icmpv4_packet (pkt, si, tos); |
|
|
264 | #endif |
|
|
265 | |
|
|
266 | default: |
|
|
267 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
268 | return false; |
|
|
269 | } |
|
|
270 | } |
333 | } |
271 | |
334 | |
272 | bool |
335 | bool |
273 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
336 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
274 | { |
337 | { |
… | |
… | |
393 | else |
456 | else |
394 | c->recv_vpn_packet (pkt, rsi); |
457 | c->recv_vpn_packet (pkt, rsi); |
395 | } |
458 | } |
396 | } |
459 | } |
397 | |
460 | |
|
|
461 | bool |
|
|
462 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
463 | { |
|
|
464 | switch (si.prot) |
|
|
465 | { |
|
|
466 | case PROT_IPv4: |
|
|
467 | return send_ipv4_packet (pkt, si, tos); |
|
|
468 | case PROT_UDPv4: |
|
|
469 | return send_udpv4_packet (pkt, si, tos); |
|
|
470 | #if ENABLE_TCP |
|
|
471 | case PROT_TCPv4: |
|
|
472 | return send_tcpv4_packet (pkt, si, tos); |
|
|
473 | #endif |
|
|
474 | #if ENABLE_ICMP |
|
|
475 | case PROT_ICMPv4: |
|
|
476 | return send_icmpv4_packet (pkt, si, tos); |
|
|
477 | #endif |
|
|
478 | #if ENABLE_DNS |
|
|
479 | case PROT_DNSv4: |
|
|
480 | return send_dnsv4_packet (pkt, si, tos); |
|
|
481 | #endif |
|
|
482 | |
|
|
483 | default: |
|
|
484 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
485 | } |
|
|
486 | |
|
|
487 | return false; |
|
|
488 | } |
|
|
489 | |
398 | void |
490 | void |
399 | vpn::ipv4_ev (io_watcher &w, short revents) |
491 | vpn::ipv4_ev (io_watcher &w, short revents) |
400 | { |
492 | { |
401 | if (revents & (POLLIN | POLLERR)) |
493 | if (revents & EVENT_READ) |
402 | { |
494 | { |
403 | vpn_packet *pkt = new vpn_packet; |
495 | vpn_packet *pkt = new vpn_packet; |
404 | struct sockaddr_in sa; |
496 | struct sockaddr_in sa; |
405 | socklen_t sa_len = sizeof (sa); |
497 | socklen_t sa_len = sizeof (sa); |
406 | int len; |
498 | int len; |
… | |
… | |
411 | |
503 | |
412 | if (len > 0) |
504 | if (len > 0) |
413 | { |
505 | { |
414 | pkt->len = len; |
506 | pkt->len = len; |
415 | |
507 | |
416 | // raw sockets deliver the ipv4, but don't expect it on sends |
508 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
417 | // this is slow, but... |
|
|
418 | pkt->skip_hdr (IP_OVERHEAD); |
509 | pkt->skip_hdr (IP_OVERHEAD); |
419 | |
510 | |
420 | recv_vpn_packet (pkt, si); |
511 | recv_vpn_packet (pkt, si); |
421 | } |
512 | } |
422 | else |
513 | else |
… | |
… | |
425 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
516 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
426 | } |
517 | } |
427 | |
518 | |
428 | delete pkt; |
519 | delete pkt; |
429 | } |
520 | } |
430 | else if (revents & POLLHUP) |
|
|
431 | { |
|
|
432 | // this cannot ;) happen on udp sockets |
|
|
433 | slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating.")); |
|
|
434 | exit (1); |
|
|
435 | } |
|
|
436 | else |
521 | else |
437 | { |
522 | { |
438 | slog (L_ERR, |
523 | slog (L_ERR, |
439 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
524 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
440 | revents); |
525 | revents); |
441 | exit (1); |
526 | exit (EXIT_FAILURE); |
442 | } |
527 | } |
443 | } |
528 | } |
444 | |
529 | |
445 | #if ENABLE_ICMP |
530 | #if ENABLE_ICMP |
446 | void |
531 | void |
447 | vpn::icmpv4_ev (io_watcher &w, short revents) |
532 | vpn::icmpv4_ev (io_watcher &w, short revents) |
448 | { |
533 | { |
449 | if (revents & (POLLIN | POLLERR)) |
534 | if (revents & EVENT_READ) |
450 | { |
535 | { |
451 | vpn_packet *pkt = new vpn_packet; |
536 | vpn_packet *pkt = new vpn_packet; |
452 | struct sockaddr_in sa; |
537 | struct sockaddr_in sa; |
453 | socklen_t sa_len = sizeof (sa); |
538 | socklen_t sa_len = sizeof (sa); |
454 | int len; |
539 | int len; |
… | |
… | |
479 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
564 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
480 | } |
565 | } |
481 | |
566 | |
482 | delete pkt; |
567 | delete pkt; |
483 | } |
568 | } |
484 | else if (revents & POLLHUP) |
|
|
485 | { |
|
|
486 | // this cannot ;) happen on udp sockets |
|
|
487 | slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating.")); |
|
|
488 | exit (1); |
|
|
489 | } |
|
|
490 | else |
569 | else |
491 | { |
570 | { |
492 | slog (L_ERR, |
571 | slog (L_ERR, |
493 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
572 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
494 | revents); |
573 | revents); |
495 | exit (1); |
574 | exit (EXIT_FAILURE); |
496 | } |
575 | } |
497 | } |
576 | } |
498 | #endif |
577 | #endif |
499 | |
578 | |
500 | void |
579 | void |
501 | vpn::udpv4_ev (io_watcher &w, short revents) |
580 | vpn::udpv4_ev (io_watcher &w, short revents) |
502 | { |
581 | { |
503 | if (revents & (POLLIN | POLLERR)) |
582 | if (revents & EVENT_READ) |
504 | { |
583 | { |
505 | vpn_packet *pkt = new vpn_packet; |
584 | vpn_packet *pkt = new vpn_packet; |
506 | struct sockaddr_in sa; |
585 | struct sockaddr_in sa; |
507 | socklen_t sa_len = sizeof (sa); |
586 | socklen_t sa_len = sizeof (sa); |
508 | int len; |
587 | int len; |
… | |
… | |
523 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
602 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
524 | } |
603 | } |
525 | |
604 | |
526 | delete pkt; |
605 | delete pkt; |
527 | } |
606 | } |
528 | else if (revents & POLLHUP) |
|
|
529 | { |
|
|
530 | // this cannot ;) happen on udp sockets |
|
|
531 | slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating.")); |
|
|
532 | exit (1); |
|
|
533 | } |
|
|
534 | else |
607 | else |
535 | { |
608 | { |
536 | slog (L_ERR, |
609 | slog (L_ERR, |
537 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
610 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
538 | revents); |
611 | revents); |
539 | exit (1); |
612 | exit (EXIT_FAILURE); |
540 | } |
613 | } |
541 | } |
614 | } |
542 | |
615 | |
543 | void |
616 | void |
544 | vpn::tap_ev (io_watcher &w, short revents) |
617 | vpn::tap_ev (io_watcher &w, short revents) |
545 | { |
618 | { |
546 | if (revents & POLLIN) |
619 | if (revents & EVENT_READ) |
547 | { |
620 | { |
548 | /* process data */ |
621 | /* process data */ |
549 | tap_packet *pkt; |
622 | tap_packet *pkt; |
550 | |
623 | |
551 | pkt = tap->recv (); |
624 | pkt = tap->recv (); |
… | |
… | |
558 | int dst = mac2id (pkt->dst); |
631 | int dst = mac2id (pkt->dst); |
559 | int src = mac2id (pkt->src); |
632 | int src = mac2id (pkt->src); |
560 | |
633 | |
561 | if (src != THISNODE->id) |
634 | if (src != THISNODE->id) |
562 | { |
635 | { |
563 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
636 | slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
564 | exit (1); |
637 | exit (EXIT_FAILURE); |
565 | } |
638 | } |
566 | |
639 | |
567 | if (dst == THISNODE->id) |
640 | if (dst == THISNODE->id) |
568 | { |
641 | { |
569 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
642 | slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting.")); |
570 | exit (1); |
643 | exit (EXIT_FAILURE); |
571 | } |
644 | } |
572 | |
645 | |
573 | if (dst > conns.size ()) |
646 | if (dst > conns.size ()) |
574 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
647 | slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
575 | else |
648 | else |
576 | inject_data_packet (pkt, dst); |
649 | inject_data_packet (pkt, dst); |
577 | } |
650 | } |
578 | |
651 | |
579 | delete pkt; |
652 | delete pkt; |
580 | } |
653 | } |
581 | else if (revents & (POLLHUP | POLLERR)) |
|
|
582 | { |
|
|
583 | slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating.")); |
|
|
584 | exit (1); |
|
|
585 | } |
|
|
586 | else |
654 | else |
587 | abort (); |
655 | abort (); |
588 | } |
656 | } |
589 | |
657 | |
590 | void |
658 | void |
… | |
… | |
595 | if (events & EVENT_SHUTDOWN) |
663 | if (events & EVENT_SHUTDOWN) |
596 | { |
664 | { |
597 | slog (L_INFO, _("preparing shutdown...")); |
665 | slog (L_INFO, _("preparing shutdown...")); |
598 | |
666 | |
599 | shutdown_all (); |
667 | shutdown_all (); |
600 | |
|
|
601 | remove_pid (pidfilename); |
668 | remove_pid (conf.pidfilename); |
602 | |
|
|
603 | slog (L_INFO, _("terminating")); |
669 | slog (L_INFO, _("terminating")); |
604 | |
670 | exit (EXIT_SUCCESS); |
605 | exit (0); |
|
|
606 | } |
671 | } |
607 | |
672 | |
608 | if (events & EVENT_RECONNECT) |
673 | if (events & EVENT_RECONNECT) |
609 | { |
674 | { |
610 | slog (L_INFO, _("forced reconnect")); |
675 | slog (L_INFO, _("forced reconnect")); |
… | |
… | |
612 | reconnect_all (); |
677 | reconnect_all (); |
613 | } |
678 | } |
614 | |
679 | |
615 | events = 0; |
680 | events = 0; |
616 | } |
681 | } |
617 | |
|
|
618 | w.at = TSTAMP_CANCEL; |
|
|
619 | } |
682 | } |
620 | |
683 | |
621 | void |
684 | void |
622 | vpn::shutdown_all () |
685 | vpn::shutdown_all () |
623 | { |
686 | { |
… | |
… | |
636 | connection_init (); |
699 | connection_init (); |
637 | |
700 | |
638 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
701 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
639 | i != conf.nodes.end (); ++i) |
702 | i != conf.nodes.end (); ++i) |
640 | { |
703 | { |
641 | connection *conn = new connection (this); |
704 | connection *conn = new connection (this, *i); |
642 | |
|
|
643 | conn->conf = *i; |
|
|
644 | conns.push_back (conn); |
705 | conns.push_back (conn); |
645 | |
|
|
646 | conn->establish_connection (); |
706 | conn->establish_connection (); |
647 | } |
707 | } |
648 | } |
708 | } |
649 | |
709 | |
650 | connection *vpn::find_router () |
710 | connection *vpn::find_router () |
… | |
… | |
713 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
773 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
714 | #endif |
774 | #endif |
715 | #if ENABLE_ICMP |
775 | #if ENABLE_ICMP |
716 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
776 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
717 | #endif |
777 | #endif |
|
|
778 | #if ENABLE_DNS |
|
|
779 | , dnsv4_ev_watcher (this, &vpn::dnsv4_ev) |
|
|
780 | #endif |
718 | , tap_ev_watcher (this, &vpn::tap_ev) |
781 | , tap_ev_watcher (this, &vpn::tap_ev) |
719 | { |
782 | { |
720 | } |
783 | } |
721 | |
784 | |
722 | vpn::~vpn () |
785 | vpn::~vpn () |