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) 2003-2008 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 it |
6 | it under the terms of the GNU General Public License as published by |
8 | under the terms of the GNU General Public License as published by the |
7 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
8 | (at your option) any later version. |
10 | option) any later version. |
9 | |
11 | |
10 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, but |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
13 | GNU General Public License for more details. |
15 | Public License for more details. |
14 | |
16 | |
15 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License along |
16 | along with this program; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | |
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20 | Additional permission under GNU GPL version 3 section 7 |
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21 | |
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22 | If you modify this Program, or any covered work, by linking or |
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23 | combining it with the OpenSSL project's OpenSSL library (or a modified |
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24 | version of that library), containing parts covered by the terms of the |
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25 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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26 | additional permission to convey the resulting work. Corresponding |
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27 | Source for a non-source form of such a combination shall include the |
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28 | source code for the parts of OpenSSL used as well as that of the |
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29 | covered work. |
18 | */ |
30 | */ |
19 | |
31 | |
20 | #include "config.h" |
32 | #include "config.h" |
21 | |
33 | |
22 | #include <list> |
34 | #include <list> |
… | |
… | |
44 | |
56 | |
45 | vpn network; // THE vpn (bad design...) |
57 | vpn network; // THE vpn (bad design...) |
46 | |
58 | |
47 | ///////////////////////////////////////////////////////////////////////////// |
59 | ///////////////////////////////////////////////////////////////////////////// |
48 | |
60 | |
49 | const char *vpn::script_if_up () |
61 | static void inline |
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62 | set_tos (int fd, int &tos_prev, int tos) |
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63 | { |
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64 | #if defined(SOL_IP) && defined(IP_TOS) |
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65 | if (tos_prev == tos) |
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66 | return; |
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67 | |
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68 | tos_prev = tos; |
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69 | setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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70 | #endif |
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71 | } |
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72 | |
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73 | void |
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74 | vpn::script_init_env () |
50 | { |
75 | { |
51 | // the tunnel device mtu should be the physical mtu - overhead |
76 | // the tunnel device mtu should be the physical mtu - overhead |
52 | // the tricky part is rounding to the cipher key blocksize |
77 | // the tricky part is rounding to the cipher key blocksize |
53 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
78 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
54 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
79 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
55 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
80 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
56 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
81 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
57 | |
82 | |
58 | char *env; |
83 | char *env; |
59 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
84 | 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); |
85 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
63 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
86 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
64 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
87 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
65 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
88 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
66 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
89 | asprintf (&env, "NODES=%d", conns.size ()); putenv (env); |
67 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
90 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
68 | THISNODE->id & 0xff); |
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69 | putenv (env); |
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70 | |
91 | |
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92 | conns [THISNODE->id - 1]->script_init_env (""); |
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93 | |
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94 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
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95 | { |
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96 | char ext[16]; |
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97 | snprintf (ext, 16, "_%d", (*c)->conf->id); |
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98 | (*c)->script_init_env (ext); |
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99 | } |
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100 | } |
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101 | |
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102 | inline const char * |
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103 | vpn::script_if_init () |
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104 | { |
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105 | script_init_env (); |
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106 | |
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107 | return tap->if_up (); |
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108 | } |
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109 | |
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110 | inline const char * |
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111 | vpn::script_if_up () |
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112 | { |
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113 | script_init_env (); |
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114 | |
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115 | char *filename; |
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116 | asprintf (&filename, |
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117 | "%s/%s", |
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118 | confbase, |
71 | return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; |
119 | ::conf.script_if_up ? ::conf.script_if_up : "if-up"); |
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120 | |
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121 | return filename; |
72 | } |
122 | } |
73 | |
123 | |
74 | int |
124 | int |
75 | vpn::setup () |
125 | vpn::setup () |
76 | { |
126 | { |
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127 | ipv4_tos = -1; |
77 | ipv4_fd = -1; |
128 | ipv4_fd = -1; |
78 | |
129 | |
79 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
130 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
80 | { |
131 | { |
81 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
132 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
82 | |
133 | |
83 | if (ipv4_fd < 0) |
134 | if (ipv4_fd < 0) |
84 | return -1; |
135 | return -1; |
85 | |
136 | |
86 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
137 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
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138 | fcntl (ipv4_fd, F_SETFD, FD_CLOEXEC); |
87 | |
139 | |
88 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
140 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
89 | // this I really consider a linux bug. I am neither connected |
141 | // this I really consider a linux bug. I am neither connected |
90 | // nor do I fragment myself. Linux still sets DF and doesn't |
142 | // nor do I fragment myself. Linux still sets DF and doesn't |
91 | // fragment for me sometimes. |
143 | // fragment for me sometimes. |
… | |
… | |
101 | { |
153 | { |
102 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
154 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
103 | exit (EXIT_FAILURE); |
155 | exit (EXIT_FAILURE); |
104 | } |
156 | } |
105 | |
157 | |
106 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
158 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
107 | } |
159 | } |
108 | |
160 | |
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161 | udpv4_tos = -1; |
109 | udpv4_fd = -1; |
162 | udpv4_fd = -1; |
110 | |
163 | |
111 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
164 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
112 | { |
165 | { |
113 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
166 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
114 | |
167 | |
115 | if (udpv4_fd < 0) |
168 | if (udpv4_fd < 0) |
116 | return -1; |
169 | return -1; |
117 | |
170 | |
118 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
171 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
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172 | fcntl (udpv4_fd, F_SETFD, FD_CLOEXEC); |
119 | |
173 | |
120 | // standard daemon practise... |
174 | // standard daemon practise... |
121 | { |
175 | { |
122 | int oval = 1; |
176 | int oval = 1; |
123 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
177 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
139 | { |
193 | { |
140 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
194 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
141 | exit (EXIT_FAILURE); |
195 | exit (EXIT_FAILURE); |
142 | } |
196 | } |
143 | |
197 | |
144 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
198 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
145 | } |
199 | } |
146 | |
200 | |
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201 | icmpv4_tos = -1; |
147 | icmpv4_fd = -1; |
202 | icmpv4_fd = -1; |
148 | |
203 | |
149 | #if ENABLE_ICMP |
204 | #if ENABLE_ICMP |
150 | if (THISNODE->protocols & PROT_ICMPv4) |
205 | if (THISNODE->protocols & PROT_ICMPv4) |
151 | { |
206 | { |
152 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
207 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
153 | |
208 | |
154 | if (icmpv4_fd < 0) |
209 | if (icmpv4_fd < 0) |
155 | return -1; |
210 | return -1; |
156 | |
211 | |
157 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
212 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
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213 | fcntl (icmpv4_fd, F_SETFD, FD_CLOEXEC); |
158 | |
214 | |
159 | #ifdef ICMP_FILTER |
215 | #ifdef ICMP_FILTER |
160 | { |
216 | { |
161 | icmp_filter oval; |
217 | icmp_filter oval; |
162 | oval.data = 0xffffffff; |
218 | oval.data = 0xffffffff; |
… | |
… | |
171 | // this I really consider a linux bug. I am neither connected |
227 | // this I really consider a linux bug. I am neither connected |
172 | // nor do I fragment myself. Linux still sets DF and doesn't |
228 | // nor do I fragment myself. Linux still sets DF and doesn't |
173 | // fragment for me sometimes. |
229 | // fragment for me sometimes. |
174 | { |
230 | { |
175 | int oval = IP_PMTUDISC_DONT; |
231 | int oval = IP_PMTUDISC_DONT; |
176 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
232 | setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
177 | } |
233 | } |
178 | #endif |
234 | #endif |
179 | |
235 | |
180 | sockinfo si (THISNODE, PROT_ICMPv4); |
236 | sockinfo si (THISNODE, PROT_ICMPv4); |
181 | |
237 | |
… | |
… | |
183 | { |
239 | { |
184 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
240 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
185 | exit (EXIT_FAILURE); |
241 | exit (EXIT_FAILURE); |
186 | } |
242 | } |
187 | |
243 | |
188 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
244 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
189 | } |
245 | } |
190 | #endif |
246 | #endif |
191 | |
247 | |
192 | tcpv4_fd = -1; |
248 | tcpv4_fd = -1; |
193 | |
249 | |
… | |
… | |
198 | |
254 | |
199 | if (tcpv4_fd < 0) |
255 | if (tcpv4_fd < 0) |
200 | return -1; |
256 | return -1; |
201 | |
257 | |
202 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
258 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
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259 | fcntl (tcpv4_fd, F_SETFD, FD_CLOEXEC); |
203 | |
260 | |
204 | // standard daemon practise... |
261 | // standard daemon practise... |
205 | { |
262 | { |
206 | int oval = 1; |
263 | int oval = 1; |
207 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
264 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
219 | { |
276 | { |
220 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
277 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
221 | exit (EXIT_FAILURE); |
278 | exit (EXIT_FAILURE); |
222 | } |
279 | } |
223 | |
280 | |
224 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
281 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
225 | } |
282 | } |
226 | #endif |
283 | #endif |
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284 | |
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285 | dnsv4_tos = -1; |
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286 | dnsv4_fd = -1; |
227 | |
287 | |
228 | #if ENABLE_DNS |
288 | #if ENABLE_DNS |
229 | if (THISNODE->protocols & PROT_DNSv4) |
289 | if (THISNODE->protocols & PROT_DNSv4) |
230 | { |
290 | { |
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291 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
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292 | |
231 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
293 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
232 | |
294 | |
233 | if (dnsv4_fd < 0) |
295 | if (dnsv4_fd < 0) |
234 | return -1; |
296 | return -1; |
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297 | |
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298 | fcntl (dnsv4_fd, F_SETFL, O_NONBLOCK); |
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299 | fcntl (dnsv4_fd, F_SETFD, FD_CLOEXEC); |
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300 | |
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301 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
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302 | // this I really consider a linux bug. I am neither connected |
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303 | // nor do I fragment myself. Linux still sets DF and doesn't |
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304 | // fragment for me sometimes. |
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305 | { |
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306 | int oval = IP_PMTUDISC_DONT; |
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307 | setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
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308 | } |
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309 | # endif |
235 | |
310 | |
236 | // standard daemon practise... |
311 | // standard daemon practise... |
237 | { |
312 | { |
238 | int oval = 1; |
313 | int oval = 1; |
239 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
314 | setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
240 | } |
315 | } |
241 | |
316 | |
242 | sockinfo si (THISNODE, PROT_DNSv4); |
317 | sockinfo si (THISNODE->dns_hostname, |
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318 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
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319 | PROT_DNSv4); |
243 | |
320 | |
244 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
321 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
245 | { |
322 | { |
246 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
323 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
247 | exit (EXIT_FAILURE); |
324 | exit (EXIT_FAILURE); |
248 | } |
325 | } |
249 | |
326 | |
250 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
327 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
251 | } |
328 | } |
252 | #endif |
329 | #endif |
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330 | |
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331 | ///////////////////////////////////////////////////////////////////////////// |
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332 | |
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333 | reconnect_all (); |
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334 | |
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335 | ///////////////////////////////////////////////////////////////////////////// |
253 | |
336 | |
254 | tap = new tap_device (); |
337 | tap = new tap_device (); |
255 | if (!tap) //D this, of course, never catches |
338 | if (!tap) //D this, of course, never catches |
256 | { |
339 | { |
257 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
340 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
258 | exit (EXIT_FAILURE); |
341 | exit (EXIT_FAILURE); |
259 | } |
342 | } |
260 | |
343 | |
261 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
344 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
262 | |
345 | |
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346 | run_script_cb cb; |
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347 | cb.set<vpn, &vpn::script_if_init> (this); |
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348 | |
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349 | if (tap->if_up () && |
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350 | !run_script (cb, true)) |
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351 | { |
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352 | slog (L_ERR, _("interface initialization command '%s' failed, exiting."), |
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353 | tap->if_up ()); |
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354 | exit (EXIT_FAILURE); |
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355 | } |
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356 | |
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357 | cb.set<vpn, &vpn::script_if_up> (this); |
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358 | if (!run_script (cb, true)) |
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359 | { |
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360 | slog (L_ERR, _("if-up command execution failed, exiting.")); |
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361 | exit (EXIT_FAILURE); |
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362 | } |
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363 | |
263 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
364 | tap_ev_watcher.start (tap->fd, EV_READ); |
264 | |
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265 | reconnect_all (); |
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266 | |
365 | |
267 | return 0; |
366 | 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 | } |
367 | } |
302 | |
368 | |
303 | bool |
369 | bool |
304 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
370 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
305 | { |
371 | { |
306 | #if defined(SOL_IP) && defined(IP_TOS) |
372 | 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 ()); |
373 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
310 | |
374 | |
311 | return true; |
375 | return true; |
312 | } |
376 | } |
313 | |
377 | |
… | |
… | |
336 | |
400 | |
337 | #if ENABLE_ICMP |
401 | #if ENABLE_ICMP |
338 | bool |
402 | bool |
339 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
403 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
340 | { |
404 | { |
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); |
405 | pkt->unshift_hdr (4); |
346 | |
406 | |
347 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
407 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
348 | hdr->type = ::conf.icmp_type; |
408 | hdr->type = ::conf.icmp_type; |
349 | hdr->code = 255; |
409 | hdr->code = 255; |
350 | hdr->checksum = 0; |
410 | hdr->checksum = 0; |
351 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
411 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
352 | |
412 | |
|
|
413 | set_tos (icmpv4_fd, icmpv4_tos, tos); |
353 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
414 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
354 | |
415 | |
355 | return true; |
416 | return true; |
356 | } |
417 | } |
357 | #endif |
418 | #endif |
358 | |
419 | |
359 | bool |
420 | bool |
360 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
421 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
361 | { |
422 | { |
362 | #if defined(SOL_IP) && defined(IP_TOS) |
423 | 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 ()); |
424 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
366 | |
425 | |
367 | return true; |
426 | return true; |
368 | } |
427 | } |
369 | |
428 | |
… | |
… | |
380 | { |
439 | { |
381 | // broadcast, this is ugly, but due to the security policy |
440 | // broadcast, this is ugly, but due to the security policy |
382 | // we have to connect to all hosts... |
441 | // we have to connect to all hosts... |
383 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
442 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
384 | if ((*c)->conf != THISNODE) |
443 | if ((*c)->conf != THISNODE) |
385 | (*c)->inject_data_packet (pkt, true); |
444 | (*c)->inject_data_packet (pkt); |
386 | } |
445 | } |
387 | } |
446 | } |
388 | |
447 | |
389 | void |
448 | void |
390 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
449 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
… | |
… | |
424 | else |
483 | else |
425 | c->recv_vpn_packet (pkt, rsi); |
484 | c->recv_vpn_packet (pkt, rsi); |
426 | } |
485 | } |
427 | } |
486 | } |
428 | |
487 | |
429 | void |
488 | bool |
|
|
489 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
490 | { |
|
|
491 | switch (si.prot) |
|
|
492 | { |
|
|
493 | case PROT_IPv4: |
|
|
494 | return send_ipv4_packet (pkt, si, tos); |
|
|
495 | |
|
|
496 | case PROT_UDPv4: |
|
|
497 | return send_udpv4_packet (pkt, si, tos); |
|
|
498 | |
|
|
499 | #if ENABLE_TCP |
|
|
500 | case PROT_TCPv4: |
|
|
501 | return send_tcpv4_packet (pkt, si, tos); |
|
|
502 | #endif |
|
|
503 | #if ENABLE_ICMP |
|
|
504 | case PROT_ICMPv4: |
|
|
505 | return send_icmpv4_packet (pkt, si, tos); |
|
|
506 | #endif |
|
|
507 | #if ENABLE_DNS |
|
|
508 | case PROT_DNSv4: |
|
|
509 | return send_dnsv4_packet (pkt, si, tos); |
|
|
510 | #endif |
|
|
511 | default: |
|
|
512 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
513 | } |
|
|
514 | |
|
|
515 | return false; |
|
|
516 | } |
|
|
517 | |
|
|
518 | inline void |
430 | vpn::ipv4_ev (io_watcher &w, short revents) |
519 | vpn::ipv4_ev (ev::io &w, int revents) |
431 | { |
520 | { |
432 | if (revents & EVENT_READ) |
521 | if (revents & EV_READ) |
433 | { |
522 | { |
434 | vpn_packet *pkt = new vpn_packet; |
523 | vpn_packet *pkt = new vpn_packet; |
435 | struct sockaddr_in sa; |
524 | struct sockaddr_in sa; |
436 | socklen_t sa_len = sizeof (sa); |
525 | socklen_t sa_len = sizeof (sa); |
437 | int len; |
526 | int len; |
… | |
… | |
442 | |
531 | |
443 | if (len > 0) |
532 | if (len > 0) |
444 | { |
533 | { |
445 | pkt->len = len; |
534 | pkt->len = len; |
446 | |
535 | |
447 | // raw sockets deliver the ipv4, but don't expect it on sends |
536 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
448 | // this is slow, but... |
|
|
449 | pkt->skip_hdr (IP_OVERHEAD); |
537 | pkt->skip_hdr (IP_OVERHEAD); |
450 | |
538 | |
451 | recv_vpn_packet (pkt, si); |
539 | recv_vpn_packet (pkt, si); |
452 | } |
540 | } |
453 | else |
541 | else |
… | |
… | |
459 | delete pkt; |
547 | delete pkt; |
460 | } |
548 | } |
461 | else |
549 | else |
462 | { |
550 | { |
463 | slog (L_ERR, |
551 | slog (L_ERR, |
464 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
552 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
465 | revents); |
553 | revents); |
466 | exit (EXIT_FAILURE); |
554 | exit (EXIT_FAILURE); |
467 | } |
555 | } |
468 | } |
556 | } |
469 | |
557 | |
470 | #if ENABLE_ICMP |
558 | #if ENABLE_ICMP |
471 | void |
559 | inline void |
472 | vpn::icmpv4_ev (io_watcher &w, short revents) |
560 | vpn::icmpv4_ev (ev::io &w, int revents) |
473 | { |
561 | { |
474 | if (revents & EVENT_READ) |
562 | if (revents & EV_READ) |
475 | { |
563 | { |
476 | vpn_packet *pkt = new vpn_packet; |
564 | vpn_packet *pkt = new vpn_packet; |
477 | struct sockaddr_in sa; |
565 | struct sockaddr_in sa; |
478 | socklen_t sa_len = sizeof (sa); |
566 | socklen_t sa_len = sizeof (sa); |
479 | int len; |
567 | int len; |
… | |
… | |
514 | exit (EXIT_FAILURE); |
602 | exit (EXIT_FAILURE); |
515 | } |
603 | } |
516 | } |
604 | } |
517 | #endif |
605 | #endif |
518 | |
606 | |
519 | void |
607 | inline void |
520 | vpn::udpv4_ev (io_watcher &w, short revents) |
608 | vpn::udpv4_ev (ev::io &w, int revents) |
521 | { |
609 | { |
522 | if (revents & EVENT_READ) |
610 | if (revents & EV_READ) |
523 | { |
611 | { |
524 | vpn_packet *pkt = new vpn_packet; |
612 | vpn_packet *pkt = new vpn_packet; |
525 | struct sockaddr_in sa; |
613 | struct sockaddr_in sa; |
526 | socklen_t sa_len = sizeof (sa); |
614 | socklen_t sa_len = sizeof (sa); |
527 | int len; |
615 | int len; |
… | |
… | |
551 | revents); |
639 | revents); |
552 | exit (EXIT_FAILURE); |
640 | exit (EXIT_FAILURE); |
553 | } |
641 | } |
554 | } |
642 | } |
555 | |
643 | |
556 | void |
644 | inline void |
557 | vpn::tap_ev (io_watcher &w, short revents) |
645 | vpn::tap_ev (ev::io &w, int revents) |
558 | { |
646 | { |
559 | if (revents & EVENT_READ) |
647 | if (revents & EV_READ) |
560 | { |
648 | { |
561 | /* process data */ |
649 | /* process data */ |
562 | tap_packet *pkt; |
650 | tap_packet *pkt; |
563 | |
651 | |
564 | pkt = tap->recv (); |
652 | pkt = tap->recv (); |
… | |
… | |
571 | int dst = mac2id (pkt->dst); |
659 | int dst = mac2id (pkt->dst); |
572 | int src = mac2id (pkt->src); |
660 | int src = mac2id (pkt->src); |
573 | |
661 | |
574 | if (src != THISNODE->id) |
662 | if (src != THISNODE->id) |
575 | { |
663 | { |
576 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
664 | slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
577 | exit (EXIT_FAILURE); |
665 | exit (EXIT_FAILURE); |
578 | } |
666 | } |
579 | |
667 | |
580 | if (dst == THISNODE->id) |
668 | if (dst == THISNODE->id) |
581 | { |
669 | { |
… | |
… | |
593 | } |
681 | } |
594 | else |
682 | else |
595 | abort (); |
683 | abort (); |
596 | } |
684 | } |
597 | |
685 | |
598 | void |
686 | inline void |
599 | vpn::event_cb (time_watcher &w) |
687 | vpn::event_cb (ev::timer &w, int) |
600 | { |
688 | { |
601 | if (events) |
689 | if (events) |
602 | { |
690 | { |
603 | if (events & EVENT_SHUTDOWN) |
691 | if (events & EVENT_SHUTDOWN) |
604 | { |
692 | { |
… | |
… | |
639 | connection_init (); |
727 | connection_init (); |
640 | |
728 | |
641 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
729 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
642 | i != conf.nodes.end (); ++i) |
730 | i != conf.nodes.end (); ++i) |
643 | { |
731 | { |
644 | connection *conn = new connection (this); |
732 | connection *conn = new connection (this, *i); |
645 | |
|
|
646 | conn->conf = *i; |
|
|
647 | conns.push_back (conn); |
733 | conns.push_back (conn); |
648 | |
|
|
649 | conn->establish_connection (); |
734 | conn->establish_connection (); |
650 | } |
735 | } |
651 | } |
736 | } |
652 | |
737 | |
653 | connection *vpn::find_router () |
738 | connection *vpn::find_router () |
654 | { |
739 | { |
655 | u32 prio = 0; |
740 | u32 prio = 1; |
656 | connection *router = 0; |
741 | connection *router = 0; |
657 | |
742 | |
658 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
743 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
659 | { |
744 | { |
660 | connection *c = *i; |
745 | connection *c = *i; |
… | |
… | |
691 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
776 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
692 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
777 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
693 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
778 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
694 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
779 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
695 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
780 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
696 | slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"), |
|
|
697 | (long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at)); |
|
|
698 | } |
781 | } |
699 | |
782 | |
700 | void |
783 | void |
701 | vpn::dump_status () |
784 | vpn::dump_status () |
702 | { |
785 | { |
703 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW); |
786 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ()); |
704 | |
787 | |
705 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
788 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
706 | (*c)->dump_status (); |
789 | (*c)->dump_status (); |
707 | |
790 | |
708 | slog (L_NOTICE, _("END status dump")); |
791 | slog (L_NOTICE, _("END status dump")); |
709 | } |
792 | } |
710 | |
793 | |
711 | vpn::vpn (void) |
794 | vpn::vpn (void) |
|
|
795 | { |
712 | : event (this, &vpn::event_cb) |
796 | event .set<vpn, &vpn::event_cb > (this); |
713 | , udpv4_ev_watcher (this, &vpn::udpv4_ev) |
797 | udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
714 | , ipv4_ev_watcher (this, &vpn::ipv4_ev) |
798 | ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
715 | #if ENABLE_TCP |
799 | #if ENABLE_TCP |
716 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
800 | tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
717 | #endif |
801 | #endif |
718 | #if ENABLE_ICMP |
802 | #if ENABLE_ICMP |
719 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
803 | icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |
720 | #endif |
804 | #endif |
721 | #if ENABLE_DNS |
805 | #if ENABLE_DNS |
722 | , dnsv4_ev_watcher (this, &vpn::dnsv4_ev) |
806 | dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this); |
723 | #endif |
807 | #endif |
724 | , tap_ev_watcher (this, &vpn::tap_ev) |
808 | tap_ev_watcher .set<vpn, &vpn::tap_ev > (this); |
725 | { |
|
|
726 | } |
809 | } |
727 | |
810 | |
728 | vpn::~vpn () |
811 | vpn::~vpn () |
729 | { |
812 | { |
730 | } |
813 | } |