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 | inline const char * |
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93 | vpn::script_if_init () |
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94 | { |
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95 | script_init_env (); |
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96 | |
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97 | return tap->if_up (); |
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98 | } |
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99 | |
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100 | inline const char * |
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101 | vpn::script_if_up () |
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102 | { |
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103 | script_init_env (); |
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104 | |
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105 | char *filename; |
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106 | asprintf (&filename, |
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107 | "%s/%s", |
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108 | confbase, |
71 | return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; |
109 | ::conf.script_if_up ? ::conf.script_if_up : "if-up"); |
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110 | |
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111 | return filename; |
72 | } |
112 | } |
73 | |
113 | |
74 | int |
114 | int |
75 | vpn::setup () |
115 | vpn::setup () |
76 | { |
116 | { |
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117 | ipv4_tos = -1; |
77 | ipv4_fd = -1; |
118 | ipv4_fd = -1; |
78 | |
119 | |
79 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
120 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
80 | { |
121 | { |
81 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
122 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
82 | |
123 | |
83 | if (ipv4_fd < 0) |
124 | if (ipv4_fd < 0) |
84 | return -1; |
125 | return -1; |
85 | |
126 | |
86 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
127 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
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128 | fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC); |
87 | |
129 | |
88 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
130 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
89 | // this I really consider a linux bug. I am neither connected |
131 | // this I really consider a linux bug. I am neither connected |
90 | // nor do I fragment myself. Linux still sets DF and doesn't |
132 | // nor do I fragment myself. Linux still sets DF and doesn't |
91 | // fragment for me sometimes. |
133 | // fragment for me sometimes. |
… | |
… | |
101 | { |
143 | { |
102 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
144 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
103 | exit (EXIT_FAILURE); |
145 | exit (EXIT_FAILURE); |
104 | } |
146 | } |
105 | |
147 | |
106 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
148 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
107 | } |
149 | } |
108 | |
150 | |
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151 | udpv4_tos = -1; |
109 | udpv4_fd = -1; |
152 | udpv4_fd = -1; |
110 | |
153 | |
111 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
154 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
112 | { |
155 | { |
113 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
156 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
114 | |
157 | |
115 | if (udpv4_fd < 0) |
158 | if (udpv4_fd < 0) |
116 | return -1; |
159 | return -1; |
117 | |
160 | |
118 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
161 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
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162 | fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC); |
119 | |
163 | |
120 | // standard daemon practise... |
164 | // standard daemon practise... |
121 | { |
165 | { |
122 | int oval = 1; |
166 | int oval = 1; |
123 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
167 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
139 | { |
183 | { |
140 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
184 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
141 | exit (EXIT_FAILURE); |
185 | exit (EXIT_FAILURE); |
142 | } |
186 | } |
143 | |
187 | |
144 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
188 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
145 | } |
189 | } |
146 | |
190 | |
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191 | icmpv4_tos = -1; |
147 | icmpv4_fd = -1; |
192 | icmpv4_fd = -1; |
148 | |
193 | |
149 | #if ENABLE_ICMP |
194 | #if ENABLE_ICMP |
150 | if (THISNODE->protocols & PROT_ICMPv4) |
195 | if (THISNODE->protocols & PROT_ICMPv4) |
151 | { |
196 | { |
152 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
197 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
153 | |
198 | |
154 | if (icmpv4_fd < 0) |
199 | if (icmpv4_fd < 0) |
155 | return -1; |
200 | return -1; |
156 | |
201 | |
157 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
202 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
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203 | fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC); |
158 | |
204 | |
159 | #ifdef ICMP_FILTER |
205 | #ifdef ICMP_FILTER |
160 | { |
206 | { |
161 | icmp_filter oval; |
207 | icmp_filter oval; |
162 | oval.data = 0xffffffff; |
208 | oval.data = 0xffffffff; |
… | |
… | |
171 | // this I really consider a linux bug. I am neither connected |
217 | // this I really consider a linux bug. I am neither connected |
172 | // nor do I fragment myself. Linux still sets DF and doesn't |
218 | // nor do I fragment myself. Linux still sets DF and doesn't |
173 | // fragment for me sometimes. |
219 | // fragment for me sometimes. |
174 | { |
220 | { |
175 | int oval = IP_PMTUDISC_DONT; |
221 | int oval = IP_PMTUDISC_DONT; |
176 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
222 | setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
177 | } |
223 | } |
178 | #endif |
224 | #endif |
179 | |
225 | |
180 | sockinfo si (THISNODE, PROT_ICMPv4); |
226 | sockinfo si (THISNODE, PROT_ICMPv4); |
181 | |
227 | |
… | |
… | |
183 | { |
229 | { |
184 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
230 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
185 | exit (EXIT_FAILURE); |
231 | exit (EXIT_FAILURE); |
186 | } |
232 | } |
187 | |
233 | |
188 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
234 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
189 | } |
235 | } |
190 | #endif |
236 | #endif |
191 | |
237 | |
192 | tcpv4_fd = -1; |
238 | tcpv4_fd = -1; |
193 | |
239 | |
… | |
… | |
198 | |
244 | |
199 | if (tcpv4_fd < 0) |
245 | if (tcpv4_fd < 0) |
200 | return -1; |
246 | return -1; |
201 | |
247 | |
202 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
248 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
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249 | fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC); |
203 | |
250 | |
204 | // standard daemon practise... |
251 | // standard daemon practise... |
205 | { |
252 | { |
206 | int oval = 1; |
253 | int oval = 1; |
207 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
254 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
219 | { |
266 | { |
220 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
267 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
221 | exit (EXIT_FAILURE); |
268 | exit (EXIT_FAILURE); |
222 | } |
269 | } |
223 | |
270 | |
224 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
271 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
225 | } |
272 | } |
226 | #endif |
273 | #endif |
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274 | |
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275 | dnsv4_tos = -1; |
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276 | dnsv4_fd = -1; |
227 | |
277 | |
228 | #if ENABLE_DNS |
278 | #if ENABLE_DNS |
229 | if (THISNODE->protocols & PROT_DNSv4) |
279 | if (THISNODE->protocols & PROT_DNSv4) |
230 | { |
280 | { |
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281 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
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282 | |
231 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
283 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
232 | |
284 | |
233 | if (dnsv4_fd < 0) |
285 | if (dnsv4_fd < 0) |
234 | return -1; |
286 | return -1; |
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287 | |
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288 | fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK); |
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289 | fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC); |
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290 | |
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291 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
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292 | // this I really consider a linux bug. I am neither connected |
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293 | // nor do I fragment myself. Linux still sets DF and doesn't |
|
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294 | // fragment for me sometimes. |
|
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295 | { |
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296 | int oval = IP_PMTUDISC_DONT; |
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297 | setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
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298 | } |
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299 | # endif |
235 | |
300 | |
236 | // standard daemon practise... |
301 | // standard daemon practise... |
237 | { |
302 | { |
238 | int oval = 1; |
303 | int oval = 1; |
239 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
304 | setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
240 | } |
305 | } |
241 | |
306 | |
242 | sockinfo si (THISNODE, PROT_DNSv4); |
307 | sockinfo si (THISNODE->dns_hostname, |
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308 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
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309 | PROT_DNSv4); |
243 | |
310 | |
244 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
311 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
245 | { |
312 | { |
246 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
313 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
247 | exit (EXIT_FAILURE); |
314 | exit (EXIT_FAILURE); |
248 | } |
315 | } |
249 | |
316 | |
250 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
317 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
251 | } |
318 | } |
252 | #endif |
319 | #endif |
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320 | |
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321 | ///////////////////////////////////////////////////////////////////////////// |
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322 | |
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323 | reconnect_all (); |
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324 | |
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325 | ///////////////////////////////////////////////////////////////////////////// |
253 | |
326 | |
254 | tap = new tap_device (); |
327 | tap = new tap_device (); |
255 | if (!tap) //D this, of course, never catches |
328 | if (!tap) //D this, of course, never catches |
256 | { |
329 | { |
257 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
330 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
258 | exit (EXIT_FAILURE); |
331 | exit (EXIT_FAILURE); |
259 | } |
332 | } |
260 | |
333 | |
261 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
334 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
262 | |
335 | |
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336 | run_script_cb cb; |
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337 | cb.set<vpn, &vpn::script_if_init> (this); |
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338 | |
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339 | if (tap->if_up () && |
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340 | !run_script (cb, true)) |
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341 | { |
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342 | slog (L_ERR, _("interface initialization command '%s' failed, exiting."), |
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343 | tap->if_up ()); |
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344 | exit (EXIT_FAILURE); |
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345 | } |
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346 | |
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347 | cb.set<vpn, &vpn::script_if_up> (this); |
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348 | if (!run_script (cb, true)) |
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349 | { |
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350 | slog (L_ERR, _("if-up command execution failed, exiting.")); |
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351 | exit (EXIT_FAILURE); |
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352 | } |
|
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353 | |
263 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
354 | tap_ev_watcher.start (tap->fd, EV_READ); |
264 | |
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265 | reconnect_all (); |
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266 | |
355 | |
267 | return 0; |
356 | return 0; |
268 | } |
|
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269 | |
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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 | |
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279 | case PROT_UDPv4: |
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280 | return send_udpv4_packet (pkt, si, tos); |
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281 | |
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282 | #if ENABLE_TCP |
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283 | case PROT_TCPv4: |
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284 | return send_tcpv4_packet (pkt, si, tos); |
|
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285 | #endif |
|
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286 | |
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287 | #if ENABLE_ICMP |
|
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288 | case PROT_ICMPv4: |
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289 | return send_icmpv4_packet (pkt, si, tos); |
|
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290 | #endif |
|
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291 | |
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292 | #if ENABLE_DNS |
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293 | case PROT_DNSv4: |
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294 | return send_dnsv4_packet (pkt, si, tos); |
|
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295 | #endif |
|
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296 | |
|
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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; |
|
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300 | } |
|
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301 | } |
357 | } |
302 | |
358 | |
303 | bool |
359 | bool |
304 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
360 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
305 | { |
361 | { |
306 | #if defined(SOL_IP) && defined(IP_TOS) |
362 | set_tos (ipv4_fd, ipv4_tos, tos); |
307 | setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
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308 | #endif |
|
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309 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
363 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
310 | |
364 | |
311 | return true; |
365 | return true; |
312 | } |
366 | } |
313 | |
367 | |
… | |
… | |
336 | |
390 | |
337 | #if ENABLE_ICMP |
391 | #if ENABLE_ICMP |
338 | bool |
392 | bool |
339 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
393 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
340 | { |
394 | { |
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); |
395 | pkt->unshift_hdr (4); |
346 | |
396 | |
347 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
397 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
348 | hdr->type = ::conf.icmp_type; |
398 | hdr->type = ::conf.icmp_type; |
349 | hdr->code = 255; |
399 | hdr->code = 255; |
350 | hdr->checksum = 0; |
400 | hdr->checksum = 0; |
351 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
401 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
352 | |
402 | |
|
|
403 | set_tos (icmpv4_fd, icmpv4_tos, tos); |
353 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
404 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
354 | |
405 | |
355 | return true; |
406 | return true; |
356 | } |
407 | } |
357 | #endif |
408 | #endif |
358 | |
409 | |
359 | bool |
410 | bool |
360 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
411 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
361 | { |
412 | { |
362 | #if defined(SOL_IP) && defined(IP_TOS) |
413 | 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 ()); |
414 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
366 | |
415 | |
367 | return true; |
416 | return true; |
368 | } |
417 | } |
369 | |
418 | |
… | |
… | |
380 | { |
429 | { |
381 | // broadcast, this is ugly, but due to the security policy |
430 | // broadcast, this is ugly, but due to the security policy |
382 | // we have to connect to all hosts... |
431 | // we have to connect to all hosts... |
383 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
432 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
384 | if ((*c)->conf != THISNODE) |
433 | if ((*c)->conf != THISNODE) |
385 | (*c)->inject_data_packet (pkt, true); |
434 | (*c)->inject_data_packet (pkt); |
386 | } |
435 | } |
387 | } |
436 | } |
388 | |
437 | |
389 | void |
438 | void |
390 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
439 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
… | |
… | |
424 | else |
473 | else |
425 | c->recv_vpn_packet (pkt, rsi); |
474 | c->recv_vpn_packet (pkt, rsi); |
426 | } |
475 | } |
427 | } |
476 | } |
428 | |
477 | |
429 | void |
478 | bool |
|
|
479 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
480 | { |
|
|
481 | switch (si.prot) |
|
|
482 | { |
|
|
483 | case PROT_IPv4: |
|
|
484 | return send_ipv4_packet (pkt, si, tos); |
|
|
485 | |
|
|
486 | case PROT_UDPv4: |
|
|
487 | return send_udpv4_packet (pkt, si, tos); |
|
|
488 | |
|
|
489 | #if ENABLE_TCP |
|
|
490 | case PROT_TCPv4: |
|
|
491 | return send_tcpv4_packet (pkt, si, tos); |
|
|
492 | #endif |
|
|
493 | #if ENABLE_ICMP |
|
|
494 | case PROT_ICMPv4: |
|
|
495 | return send_icmpv4_packet (pkt, si, tos); |
|
|
496 | #endif |
|
|
497 | #if ENABLE_DNS |
|
|
498 | case PROT_DNSv4: |
|
|
499 | return send_dnsv4_packet (pkt, si, tos); |
|
|
500 | #endif |
|
|
501 | default: |
|
|
502 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
503 | } |
|
|
504 | |
|
|
505 | return false; |
|
|
506 | } |
|
|
507 | |
|
|
508 | inline void |
430 | vpn::ipv4_ev (io_watcher &w, short revents) |
509 | vpn::ipv4_ev (ev::io &w, int revents) |
431 | { |
510 | { |
432 | if (revents & EVENT_READ) |
511 | if (revents & EV_READ) |
433 | { |
512 | { |
434 | vpn_packet *pkt = new vpn_packet; |
513 | vpn_packet *pkt = new vpn_packet; |
435 | struct sockaddr_in sa; |
514 | struct sockaddr_in sa; |
436 | socklen_t sa_len = sizeof (sa); |
515 | socklen_t sa_len = sizeof (sa); |
437 | int len; |
516 | int len; |
… | |
… | |
442 | |
521 | |
443 | if (len > 0) |
522 | if (len > 0) |
444 | { |
523 | { |
445 | pkt->len = len; |
524 | pkt->len = len; |
446 | |
525 | |
447 | // raw sockets deliver the ipv4, but don't expect it on sends |
526 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
448 | // this is slow, but... |
|
|
449 | pkt->skip_hdr (IP_OVERHEAD); |
527 | pkt->skip_hdr (IP_OVERHEAD); |
450 | |
528 | |
451 | recv_vpn_packet (pkt, si); |
529 | recv_vpn_packet (pkt, si); |
452 | } |
530 | } |
453 | else |
531 | else |
… | |
… | |
459 | delete pkt; |
537 | delete pkt; |
460 | } |
538 | } |
461 | else |
539 | else |
462 | { |
540 | { |
463 | slog (L_ERR, |
541 | slog (L_ERR, |
464 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
542 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
465 | revents); |
543 | revents); |
466 | exit (EXIT_FAILURE); |
544 | exit (EXIT_FAILURE); |
467 | } |
545 | } |
468 | } |
546 | } |
469 | |
547 | |
470 | #if ENABLE_ICMP |
548 | #if ENABLE_ICMP |
471 | void |
549 | inline void |
472 | vpn::icmpv4_ev (io_watcher &w, short revents) |
550 | vpn::icmpv4_ev (ev::io &w, int revents) |
473 | { |
551 | { |
474 | if (revents & EVENT_READ) |
552 | if (revents & EV_READ) |
475 | { |
553 | { |
476 | vpn_packet *pkt = new vpn_packet; |
554 | vpn_packet *pkt = new vpn_packet; |
477 | struct sockaddr_in sa; |
555 | struct sockaddr_in sa; |
478 | socklen_t sa_len = sizeof (sa); |
556 | socklen_t sa_len = sizeof (sa); |
479 | int len; |
557 | int len; |
… | |
… | |
514 | exit (EXIT_FAILURE); |
592 | exit (EXIT_FAILURE); |
515 | } |
593 | } |
516 | } |
594 | } |
517 | #endif |
595 | #endif |
518 | |
596 | |
519 | void |
597 | inline void |
520 | vpn::udpv4_ev (io_watcher &w, short revents) |
598 | vpn::udpv4_ev (ev::io &w, int revents) |
521 | { |
599 | { |
522 | if (revents & EVENT_READ) |
600 | if (revents & EV_READ) |
523 | { |
601 | { |
524 | vpn_packet *pkt = new vpn_packet; |
602 | vpn_packet *pkt = new vpn_packet; |
525 | struct sockaddr_in sa; |
603 | struct sockaddr_in sa; |
526 | socklen_t sa_len = sizeof (sa); |
604 | socklen_t sa_len = sizeof (sa); |
527 | int len; |
605 | int len; |
… | |
… | |
551 | revents); |
629 | revents); |
552 | exit (EXIT_FAILURE); |
630 | exit (EXIT_FAILURE); |
553 | } |
631 | } |
554 | } |
632 | } |
555 | |
633 | |
556 | void |
634 | inline void |
557 | vpn::tap_ev (io_watcher &w, short revents) |
635 | vpn::tap_ev (ev::io &w, int revents) |
558 | { |
636 | { |
559 | if (revents & EVENT_READ) |
637 | if (revents & EV_READ) |
560 | { |
638 | { |
561 | /* process data */ |
639 | /* process data */ |
562 | tap_packet *pkt; |
640 | tap_packet *pkt; |
563 | |
641 | |
564 | pkt = tap->recv (); |
642 | pkt = tap->recv (); |
… | |
… | |
571 | int dst = mac2id (pkt->dst); |
649 | int dst = mac2id (pkt->dst); |
572 | int src = mac2id (pkt->src); |
650 | int src = mac2id (pkt->src); |
573 | |
651 | |
574 | if (src != THISNODE->id) |
652 | if (src != THISNODE->id) |
575 | { |
653 | { |
576 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
654 | slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
577 | exit (EXIT_FAILURE); |
655 | exit (EXIT_FAILURE); |
578 | } |
656 | } |
579 | |
657 | |
580 | if (dst == THISNODE->id) |
658 | if (dst == THISNODE->id) |
581 | { |
659 | { |
… | |
… | |
593 | } |
671 | } |
594 | else |
672 | else |
595 | abort (); |
673 | abort (); |
596 | } |
674 | } |
597 | |
675 | |
598 | void |
676 | inline void |
599 | vpn::event_cb (time_watcher &w) |
677 | vpn::event_cb (ev::timer &w, int) |
600 | { |
678 | { |
601 | if (events) |
679 | if (events) |
602 | { |
680 | { |
603 | if (events & EVENT_SHUTDOWN) |
681 | if (events & EVENT_SHUTDOWN) |
604 | { |
682 | { |
… | |
… | |
639 | connection_init (); |
717 | connection_init (); |
640 | |
718 | |
641 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
719 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
642 | i != conf.nodes.end (); ++i) |
720 | i != conf.nodes.end (); ++i) |
643 | { |
721 | { |
644 | connection *conn = new connection (this); |
722 | connection *conn = new connection (this, *i); |
645 | |
|
|
646 | conn->conf = *i; |
|
|
647 | conns.push_back (conn); |
723 | conns.push_back (conn); |
648 | |
|
|
649 | conn->establish_connection (); |
724 | conn->establish_connection (); |
650 | } |
725 | } |
651 | } |
726 | } |
652 | |
727 | |
653 | connection *vpn::find_router () |
728 | connection *vpn::find_router () |
654 | { |
729 | { |
655 | u32 prio = 0; |
730 | u32 prio = 1; |
656 | connection *router = 0; |
731 | connection *router = 0; |
657 | |
732 | |
658 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
733 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
659 | { |
734 | { |
660 | connection *c = *i; |
735 | connection *c = *i; |
… | |
… | |
698 | } |
773 | } |
699 | |
774 | |
700 | void |
775 | void |
701 | vpn::dump_status () |
776 | vpn::dump_status () |
702 | { |
777 | { |
703 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW); |
778 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ()); |
704 | |
779 | |
705 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
780 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
706 | (*c)->dump_status (); |
781 | (*c)->dump_status (); |
707 | |
782 | |
708 | slog (L_NOTICE, _("END status dump")); |
783 | slog (L_NOTICE, _("END status dump")); |
709 | } |
784 | } |
710 | |
785 | |
711 | vpn::vpn (void) |
786 | vpn::vpn (void) |
|
|
787 | { |
712 | : event (this, &vpn::event_cb) |
788 | event .set<vpn, &vpn::event_cb > (this); |
713 | , udpv4_ev_watcher (this, &vpn::udpv4_ev) |
789 | udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
714 | , ipv4_ev_watcher (this, &vpn::ipv4_ev) |
790 | ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
715 | #if ENABLE_TCP |
791 | #if ENABLE_TCP |
716 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
792 | tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
717 | #endif |
793 | #endif |
718 | #if ENABLE_ICMP |
794 | #if ENABLE_ICMP |
719 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
795 | icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |
720 | #endif |
796 | #endif |
721 | #if ENABLE_DNS |
797 | #if ENABLE_DNS |
722 | , dnsv4_ev_watcher (this, &vpn::dnsv4_ev) |
798 | dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this); |
723 | #endif |
799 | #endif |
724 | , tap_ev_watcher (this, &vpn::tap_ev) |
800 | tap_ev_watcher .set<vpn, &vpn::tap_ev > (this); |
725 | { |
|
|
726 | } |
801 | } |
727 | |
802 | |
728 | vpn::~vpn () |
803 | vpn::~vpn () |
729 | { |
804 | { |
730 | } |
805 | } |