1 | /* |
1 | /* |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
3 | Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> |
3 | Copyright (C) 2003-2007 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
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5 | This file is part of GVPE. |
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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> |
… | |
… | |
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 | static void inline |
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52 | set_tos (int fd, int &tos_prev, int tos) |
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53 | { |
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54 | #if defined(SOL_IP) && defined(IP_TOS) |
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55 | if (tos_prev == tos) |
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56 | return; |
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57 | |
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58 | tos_prev = tos; |
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59 | setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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60 | #endif |
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61 | } |
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62 | |
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63 | void |
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64 | vpn::script_init_env () |
50 | { |
65 | { |
51 | // the tunnel device mtu should be the physical mtu - overhead |
66 | // the tunnel device mtu should be the physical mtu - overhead |
52 | // the tricky part is rounding to the cipher key blocksize |
67 | // the tricky part is rounding to the cipher key blocksize |
53 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
68 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
54 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
69 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
55 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
70 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
56 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
71 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
57 | |
72 | |
58 | char *env; |
73 | char *env; |
59 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
74 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
60 | asprintf (&env, "NODENAME=%s", THISNODE->nodename); putenv (env); |
|
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61 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
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62 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
75 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
63 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
76 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
64 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
77 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
65 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
78 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
66 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
79 | asprintf (&env, "NODES=%d", conns.size ()); putenv (env); |
67 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
80 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
68 | THISNODE->id & 0xff); |
|
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69 | putenv (env); |
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70 | |
81 | |
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82 | conns [THISNODE->id - 1]->script_init_env (""); |
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83 | |
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84 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
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85 | { |
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86 | char ext[16]; |
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87 | snprintf (ext, 16, "_%d", (*c)->conf->id); |
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88 | (*c)->script_init_env (ext); |
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89 | } |
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90 | } |
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91 | |
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92 | const char *vpn::script_if_init () |
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93 | { |
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94 | script_init_env (); |
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95 | |
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96 | return tap->if_up (); |
|
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97 | } |
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98 | |
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99 | const char *vpn::script_if_up () |
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100 | { |
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101 | script_init_env (); |
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102 | |
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103 | char *filename; |
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104 | asprintf (&filename, |
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105 | "%s/%s", |
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106 | confbase, |
71 | return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; |
107 | ::conf.script_if_up ? ::conf.script_if_up : "if-up"); |
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108 | |
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109 | return filename; |
72 | } |
110 | } |
73 | |
111 | |
74 | int |
112 | int |
75 | vpn::setup () |
113 | vpn::setup () |
76 | { |
114 | { |
|
|
115 | ipv4_tos = -1; |
77 | ipv4_fd = -1; |
116 | ipv4_fd = -1; |
78 | |
117 | |
79 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
118 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
80 | { |
119 | { |
81 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
120 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
82 | |
121 | |
83 | if (ipv4_fd < 0) |
122 | if (ipv4_fd < 0) |
84 | return -1; |
123 | return -1; |
85 | |
124 | |
86 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
125 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
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126 | fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC); |
87 | |
127 | |
88 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
128 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
89 | // this I really consider a linux bug. I am neither connected |
129 | // this I really consider a linux bug. I am neither connected |
90 | // nor do I fragment myself. Linux still sets DF and doesn't |
130 | // nor do I fragment myself. Linux still sets DF and doesn't |
91 | // fragment for me sometimes. |
131 | // fragment for me sometimes. |
… | |
… | |
101 | { |
141 | { |
102 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
142 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
103 | exit (EXIT_FAILURE); |
143 | exit (EXIT_FAILURE); |
104 | } |
144 | } |
105 | |
145 | |
106 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
146 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
107 | } |
147 | } |
108 | |
148 | |
|
|
149 | udpv4_tos = -1; |
109 | udpv4_fd = -1; |
150 | udpv4_fd = -1; |
110 | |
151 | |
111 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
152 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
112 | { |
153 | { |
113 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
154 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
114 | |
155 | |
115 | if (udpv4_fd < 0) |
156 | if (udpv4_fd < 0) |
116 | return -1; |
157 | return -1; |
117 | |
158 | |
118 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
159 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
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160 | fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC); |
119 | |
161 | |
120 | // standard daemon practise... |
162 | // standard daemon practise... |
121 | { |
163 | { |
122 | int oval = 1; |
164 | int oval = 1; |
123 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
165 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
139 | { |
181 | { |
140 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
182 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
141 | exit (EXIT_FAILURE); |
183 | exit (EXIT_FAILURE); |
142 | } |
184 | } |
143 | |
185 | |
144 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
186 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
145 | } |
187 | } |
146 | |
188 | |
|
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189 | icmpv4_tos = -1; |
147 | icmpv4_fd = -1; |
190 | icmpv4_fd = -1; |
148 | |
191 | |
149 | #if ENABLE_ICMP |
192 | #if ENABLE_ICMP |
150 | if (THISNODE->protocols & PROT_ICMPv4) |
193 | if (THISNODE->protocols & PROT_ICMPv4) |
151 | { |
194 | { |
152 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
195 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
153 | |
196 | |
154 | if (icmpv4_fd < 0) |
197 | if (icmpv4_fd < 0) |
155 | return -1; |
198 | return -1; |
156 | |
199 | |
157 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
200 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
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201 | fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC); |
158 | |
202 | |
159 | #ifdef ICMP_FILTER |
203 | #ifdef ICMP_FILTER |
160 | { |
204 | { |
161 | icmp_filter oval; |
205 | icmp_filter oval; |
162 | oval.data = 0xffffffff; |
206 | oval.data = 0xffffffff; |
… | |
… | |
171 | // this I really consider a linux bug. I am neither connected |
215 | // this I really consider a linux bug. I am neither connected |
172 | // nor do I fragment myself. Linux still sets DF and doesn't |
216 | // nor do I fragment myself. Linux still sets DF and doesn't |
173 | // fragment for me sometimes. |
217 | // fragment for me sometimes. |
174 | { |
218 | { |
175 | int oval = IP_PMTUDISC_DONT; |
219 | int oval = IP_PMTUDISC_DONT; |
176 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
220 | setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
177 | } |
221 | } |
178 | #endif |
222 | #endif |
179 | |
223 | |
180 | sockinfo si (THISNODE, PROT_ICMPv4); |
224 | sockinfo si (THISNODE, PROT_ICMPv4); |
181 | |
225 | |
… | |
… | |
183 | { |
227 | { |
184 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
228 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
185 | exit (EXIT_FAILURE); |
229 | exit (EXIT_FAILURE); |
186 | } |
230 | } |
187 | |
231 | |
188 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
232 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
189 | } |
233 | } |
190 | #endif |
234 | #endif |
191 | |
235 | |
192 | tcpv4_fd = -1; |
236 | tcpv4_fd = -1; |
193 | |
237 | |
… | |
… | |
198 | |
242 | |
199 | if (tcpv4_fd < 0) |
243 | if (tcpv4_fd < 0) |
200 | return -1; |
244 | return -1; |
201 | |
245 | |
202 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
246 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
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247 | fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC); |
203 | |
248 | |
204 | // standard daemon practise... |
249 | // standard daemon practise... |
205 | { |
250 | { |
206 | int oval = 1; |
251 | int oval = 1; |
207 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
252 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
219 | { |
264 | { |
220 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
265 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
221 | exit (EXIT_FAILURE); |
266 | exit (EXIT_FAILURE); |
222 | } |
267 | } |
223 | |
268 | |
224 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
269 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
225 | } |
270 | } |
226 | #endif |
271 | #endif |
|
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272 | |
|
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273 | dnsv4_tos = -1; |
|
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274 | dnsv4_fd = -1; |
227 | |
275 | |
228 | #if ENABLE_DNS |
276 | #if ENABLE_DNS |
229 | if (THISNODE->protocols & PROT_DNSv4) |
277 | if (THISNODE->protocols & PROT_DNSv4) |
230 | { |
278 | { |
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279 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
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280 | |
231 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
281 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
232 | |
282 | |
233 | if (dnsv4_fd < 0) |
283 | if (dnsv4_fd < 0) |
234 | return -1; |
284 | return -1; |
|
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285 | |
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286 | fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK); |
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287 | fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC); |
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288 | |
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289 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
|
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290 | // this I really consider a linux bug. I am neither connected |
|
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291 | // nor do I fragment myself. Linux still sets DF and doesn't |
|
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292 | // fragment for me sometimes. |
|
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293 | { |
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294 | int oval = IP_PMTUDISC_DONT; |
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295 | setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
|
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296 | } |
|
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297 | # endif |
235 | |
298 | |
236 | // standard daemon practise... |
299 | // standard daemon practise... |
237 | { |
300 | { |
238 | int oval = 1; |
301 | int oval = 1; |
239 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
302 | setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
240 | } |
303 | } |
241 | |
304 | |
242 | sockinfo si (THISNODE, PROT_DNSv4); |
305 | sockinfo si (THISNODE->dns_hostname, |
|
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306 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
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307 | PROT_DNSv4); |
243 | |
308 | |
244 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
309 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
245 | { |
310 | { |
246 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
311 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
247 | exit (EXIT_FAILURE); |
312 | exit (EXIT_FAILURE); |
248 | } |
313 | } |
249 | |
314 | |
250 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
315 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
251 | } |
316 | } |
252 | #endif |
317 | #endif |
|
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318 | |
|
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319 | ///////////////////////////////////////////////////////////////////////////// |
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320 | |
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321 | reconnect_all (); |
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322 | |
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323 | ///////////////////////////////////////////////////////////////////////////// |
253 | |
324 | |
254 | tap = new tap_device (); |
325 | tap = new tap_device (); |
255 | if (!tap) //D this, of course, never catches |
326 | if (!tap) //D this, of course, never catches |
256 | { |
327 | { |
257 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
328 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
258 | exit (EXIT_FAILURE); |
329 | exit (EXIT_FAILURE); |
259 | } |
330 | } |
260 | |
331 | |
261 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
332 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
262 | |
333 | |
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334 | run_script_cb cb; |
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335 | |
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336 | callback_set (cb, this, vpn, script_if_init); |
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337 | if (tap->if_up () && |
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338 | !run_script (cb, true)) |
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339 | { |
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340 | slog (L_ERR, _("interface initialization command '%s' failed, exiting."), |
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341 | tap->if_up ()); |
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342 | exit (EXIT_FAILURE); |
|
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343 | } |
|
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344 | |
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345 | callback_set (cb, this, vpn, script_if_up); |
|
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346 | if (!run_script (cb, true)) |
|
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347 | { |
|
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348 | slog (L_ERR, _("if-up command execution failed, exiting.")); |
|
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349 | exit (EXIT_FAILURE); |
|
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350 | } |
|
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351 | |
263 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
352 | tap_ev_watcher.start (tap->fd, EV_READ); |
264 | |
|
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265 | reconnect_all (); |
|
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266 | |
353 | |
267 | return 0; |
354 | return 0; |
268 | } |
|
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269 | |
|
|
270 | // send a vpn packet out to other hosts |
|
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271 | bool |
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272 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
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273 | { |
|
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274 | switch (si.prot) |
|
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275 | { |
|
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276 | case PROT_IPv4: |
|
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277 | return send_ipv4_packet (pkt, si, tos); |
|
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278 | |
|
|
279 | case PROT_UDPv4: |
|
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280 | return send_udpv4_packet (pkt, si, tos); |
|
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281 | |
|
|
282 | #if ENABLE_TCP |
|
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283 | case PROT_TCPv4: |
|
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284 | return send_tcpv4_packet (pkt, si, tos); |
|
|
285 | #endif |
|
|
286 | |
|
|
287 | #if ENABLE_ICMP |
|
|
288 | case PROT_ICMPv4: |
|
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289 | return send_icmpv4_packet (pkt, si, tos); |
|
|
290 | #endif |
|
|
291 | |
|
|
292 | #if ENABLE_DNS |
|
|
293 | case PROT_DNSv4: |
|
|
294 | return send_dnsv4_packet (pkt, si, tos); |
|
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295 | #endif |
|
|
296 | |
|
|
297 | default: |
|
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298 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
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299 | return false; |
|
|
300 | } |
|
|
301 | } |
355 | } |
302 | |
356 | |
303 | bool |
357 | bool |
304 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
358 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
305 | { |
359 | { |
306 | #if defined(SOL_IP) && defined(IP_TOS) |
360 | set_tos (ipv4_fd, ipv4_tos, tos); |
307 | setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
308 | #endif |
|
|
309 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
361 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
310 | |
362 | |
311 | return true; |
363 | return true; |
312 | } |
364 | } |
313 | |
365 | |
… | |
… | |
336 | |
388 | |
337 | #if ENABLE_ICMP |
389 | #if ENABLE_ICMP |
338 | bool |
390 | bool |
339 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
391 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
340 | { |
392 | { |
341 | #if defined(SOL_IP) && defined(IP_TOS) |
|
|
342 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
343 | #endif |
|
|
344 | |
|
|
345 | pkt->unshift_hdr (4); |
393 | pkt->unshift_hdr (4); |
346 | |
394 | |
347 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
395 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
348 | hdr->type = ::conf.icmp_type; |
396 | hdr->type = ::conf.icmp_type; |
349 | hdr->code = 255; |
397 | hdr->code = 255; |
350 | hdr->checksum = 0; |
398 | hdr->checksum = 0; |
351 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
399 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
352 | |
400 | |
|
|
401 | set_tos (icmpv4_fd, icmpv4_tos, tos); |
353 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
402 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
354 | |
403 | |
355 | return true; |
404 | return true; |
356 | } |
405 | } |
357 | #endif |
406 | #endif |
358 | |
407 | |
359 | bool |
408 | bool |
360 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
409 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
361 | { |
410 | { |
362 | #if defined(SOL_IP) && defined(IP_TOS) |
411 | set_tos (udpv4_fd, udpv4_tos, tos); |
363 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
364 | #endif |
|
|
365 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
412 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
366 | |
413 | |
367 | return true; |
414 | return true; |
368 | } |
415 | } |
369 | |
416 | |
… | |
… | |
424 | else |
471 | else |
425 | c->recv_vpn_packet (pkt, rsi); |
472 | c->recv_vpn_packet (pkt, rsi); |
426 | } |
473 | } |
427 | } |
474 | } |
428 | |
475 | |
|
|
476 | bool |
|
|
477 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
478 | { |
|
|
479 | switch (si.prot) |
|
|
480 | { |
|
|
481 | case PROT_IPv4: |
|
|
482 | return send_ipv4_packet (pkt, si, tos); |
|
|
483 | |
|
|
484 | case PROT_UDPv4: |
|
|
485 | return send_udpv4_packet (pkt, si, tos); |
|
|
486 | |
|
|
487 | #if ENABLE_TCP |
|
|
488 | case PROT_TCPv4: |
|
|
489 | return send_tcpv4_packet (pkt, si, tos); |
|
|
490 | #endif |
|
|
491 | #if ENABLE_ICMP |
|
|
492 | case PROT_ICMPv4: |
|
|
493 | return send_icmpv4_packet (pkt, si, tos); |
|
|
494 | #endif |
|
|
495 | #if ENABLE_DNS |
|
|
496 | case PROT_DNSv4: |
|
|
497 | return send_dnsv4_packet (pkt, si, tos); |
|
|
498 | #endif |
|
|
499 | default: |
|
|
500 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
501 | } |
|
|
502 | |
|
|
503 | return false; |
|
|
504 | } |
|
|
505 | |
429 | void |
506 | void |
430 | vpn::ipv4_ev (io_watcher &w, short revents) |
507 | vpn::ipv4_ev (ev::io &w, int revents) |
431 | { |
508 | { |
432 | if (revents & EVENT_READ) |
509 | if (revents & EV_READ) |
433 | { |
510 | { |
434 | vpn_packet *pkt = new vpn_packet; |
511 | vpn_packet *pkt = new vpn_packet; |
435 | struct sockaddr_in sa; |
512 | struct sockaddr_in sa; |
436 | socklen_t sa_len = sizeof (sa); |
513 | socklen_t sa_len = sizeof (sa); |
437 | int len; |
514 | int len; |
… | |
… | |
442 | |
519 | |
443 | if (len > 0) |
520 | if (len > 0) |
444 | { |
521 | { |
445 | pkt->len = len; |
522 | pkt->len = len; |
446 | |
523 | |
447 | // raw sockets deliver the ipv4, but don't expect it on sends |
524 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
448 | // this is slow, but... |
|
|
449 | pkt->skip_hdr (IP_OVERHEAD); |
525 | pkt->skip_hdr (IP_OVERHEAD); |
450 | |
526 | |
451 | recv_vpn_packet (pkt, si); |
527 | recv_vpn_packet (pkt, si); |
452 | } |
528 | } |
453 | else |
529 | else |
… | |
… | |
459 | delete pkt; |
535 | delete pkt; |
460 | } |
536 | } |
461 | else |
537 | else |
462 | { |
538 | { |
463 | slog (L_ERR, |
539 | slog (L_ERR, |
464 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
540 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
465 | revents); |
541 | revents); |
466 | exit (EXIT_FAILURE); |
542 | exit (EXIT_FAILURE); |
467 | } |
543 | } |
468 | } |
544 | } |
469 | |
545 | |
470 | #if ENABLE_ICMP |
546 | #if ENABLE_ICMP |
471 | void |
547 | void |
472 | vpn::icmpv4_ev (io_watcher &w, short revents) |
548 | vpn::icmpv4_ev (ev::io &w, int revents) |
473 | { |
549 | { |
474 | if (revents & EVENT_READ) |
550 | if (revents & EV_READ) |
475 | { |
551 | { |
476 | vpn_packet *pkt = new vpn_packet; |
552 | vpn_packet *pkt = new vpn_packet; |
477 | struct sockaddr_in sa; |
553 | struct sockaddr_in sa; |
478 | socklen_t sa_len = sizeof (sa); |
554 | socklen_t sa_len = sizeof (sa); |
479 | int len; |
555 | int len; |
… | |
… | |
515 | } |
591 | } |
516 | } |
592 | } |
517 | #endif |
593 | #endif |
518 | |
594 | |
519 | void |
595 | void |
520 | vpn::udpv4_ev (io_watcher &w, short revents) |
596 | vpn::udpv4_ev (ev::io &w, int revents) |
521 | { |
597 | { |
522 | if (revents & EVENT_READ) |
598 | if (revents & EV_READ) |
523 | { |
599 | { |
524 | vpn_packet *pkt = new vpn_packet; |
600 | vpn_packet *pkt = new vpn_packet; |
525 | struct sockaddr_in sa; |
601 | struct sockaddr_in sa; |
526 | socklen_t sa_len = sizeof (sa); |
602 | socklen_t sa_len = sizeof (sa); |
527 | int len; |
603 | int len; |
… | |
… | |
552 | exit (EXIT_FAILURE); |
628 | exit (EXIT_FAILURE); |
553 | } |
629 | } |
554 | } |
630 | } |
555 | |
631 | |
556 | void |
632 | void |
557 | vpn::tap_ev (io_watcher &w, short revents) |
633 | vpn::tap_ev (ev::io &w, int revents) |
558 | { |
634 | { |
559 | if (revents & EVENT_READ) |
635 | if (revents & EV_READ) |
560 | { |
636 | { |
561 | /* process data */ |
637 | /* process data */ |
562 | tap_packet *pkt; |
638 | tap_packet *pkt; |
563 | |
639 | |
564 | pkt = tap->recv (); |
640 | pkt = tap->recv (); |
… | |
… | |
571 | int dst = mac2id (pkt->dst); |
647 | int dst = mac2id (pkt->dst); |
572 | int src = mac2id (pkt->src); |
648 | int src = mac2id (pkt->src); |
573 | |
649 | |
574 | if (src != THISNODE->id) |
650 | if (src != THISNODE->id) |
575 | { |
651 | { |
576 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
652 | slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
577 | exit (EXIT_FAILURE); |
653 | exit (EXIT_FAILURE); |
578 | } |
654 | } |
579 | |
655 | |
580 | if (dst == THISNODE->id) |
656 | if (dst == THISNODE->id) |
581 | { |
657 | { |
… | |
… | |
594 | else |
670 | else |
595 | abort (); |
671 | abort (); |
596 | } |
672 | } |
597 | |
673 | |
598 | void |
674 | void |
599 | vpn::event_cb (time_watcher &w) |
675 | vpn::event_cb (ev::timer &w, int) |
600 | { |
676 | { |
601 | if (events) |
677 | if (events) |
602 | { |
678 | { |
603 | if (events & EVENT_SHUTDOWN) |
679 | if (events & EVENT_SHUTDOWN) |
604 | { |
680 | { |
… | |
… | |
639 | connection_init (); |
715 | connection_init (); |
640 | |
716 | |
641 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
717 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
642 | i != conf.nodes.end (); ++i) |
718 | i != conf.nodes.end (); ++i) |
643 | { |
719 | { |
644 | connection *conn = new connection (this); |
720 | connection *conn = new connection (this, *i); |
645 | |
|
|
646 | conn->conf = *i; |
|
|
647 | conns.push_back (conn); |
721 | conns.push_back (conn); |
648 | |
|
|
649 | conn->establish_connection (); |
722 | conn->establish_connection (); |
650 | } |
723 | } |
651 | } |
724 | } |
652 | |
725 | |
653 | connection *vpn::find_router () |
726 | connection *vpn::find_router () |
654 | { |
727 | { |
655 | u32 prio = 0; |
728 | u32 prio = 1; |
656 | connection *router = 0; |
729 | connection *router = 0; |
657 | |
730 | |
658 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
731 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
659 | { |
732 | { |
660 | connection *c = *i; |
733 | connection *c = *i; |
… | |
… | |
698 | } |
771 | } |
699 | |
772 | |
700 | void |
773 | void |
701 | vpn::dump_status () |
774 | vpn::dump_status () |
702 | { |
775 | { |
703 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW); |
776 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ()); |
704 | |
777 | |
705 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
778 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
706 | (*c)->dump_status (); |
779 | (*c)->dump_status (); |
707 | |
780 | |
708 | slog (L_NOTICE, _("END status dump")); |
781 | slog (L_NOTICE, _("END status dump")); |