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) 2003-2008,2010,2011,2013 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> |
… | |
… | |
26 | #include <cstdlib> |
38 | #include <cstdlib> |
27 | |
39 | |
28 | #include <sys/types.h> |
40 | #include <sys/types.h> |
29 | #include <sys/socket.h> |
41 | #include <sys/socket.h> |
30 | #include <sys/wait.h> |
42 | #include <sys/wait.h> |
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43 | #include <sys/stat.h> |
31 | #include <errno.h> |
44 | #include <errno.h> |
32 | #include <time.h> |
45 | #include <time.h> |
33 | #include <unistd.h> |
46 | #include <unistd.h> |
34 | #include <fcntl.h> |
47 | #include <fcntl.h> |
35 | #include <sys/socket.h> |
48 | #include <sys/socket.h> |
… | |
… | |
40 | |
53 | |
41 | #include "connection.h" |
54 | #include "connection.h" |
42 | #include "util.h" |
55 | #include "util.h" |
43 | #include "vpn.h" |
56 | #include "vpn.h" |
44 | |
57 | |
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58 | using namespace std; |
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59 | |
45 | vpn network; // THE vpn (bad design...) |
60 | vpn network; // THE vpn (bad design...) |
46 | |
61 | |
47 | ///////////////////////////////////////////////////////////////////////////// |
62 | ///////////////////////////////////////////////////////////////////////////// |
48 | |
63 | |
49 | const char *vpn::script_if_up () |
64 | static void inline |
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65 | set_tos (int fd, int &tos_prev, int tos) |
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66 | { |
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67 | #if defined(SOL_IP) && defined(IP_TOS) |
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68 | if (tos_prev == tos) |
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69 | return; |
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70 | |
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71 | tos_prev = tos; |
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72 | setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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73 | #endif |
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74 | } |
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75 | |
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76 | void |
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77 | vpn::script_init_env () |
50 | { |
78 | { |
51 | // the tunnel device mtu should be the physical mtu - overhead |
79 | // the tunnel device mtu should be the physical mtu - overhead |
52 | // the tricky part is rounding to the cipher key blocksize |
80 | // the tricky part is rounding to the cipher key blocksize |
53 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
81 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
54 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
82 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
55 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
83 | mtu -= mtu % BLOCK_SIZE (CIPHER); // round |
56 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
84 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
57 | |
85 | |
58 | char *env; |
86 | char *env; |
59 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
87 | 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); |
88 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
63 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
89 | asprintf (&env, "IFTYPE=%s", IFTYPE); putenv (env); |
64 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
90 | asprintf (&env, "IFSUBTYPE=%s", IFSUBTYPE); putenv (env); |
65 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
91 | asprintf (&env, "MTU=%d", mtu); putenv (env); |
66 | asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
92 | asprintf (&env, "NODES=%d", conns.size ()); putenv (env); |
67 | 0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
93 | asprintf (&env, "NODEID=%d", THISNODE->id); putenv (env); |
68 | THISNODE->id & 0xff); |
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69 | putenv (env); |
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70 | |
94 | |
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95 | conns [THISNODE->id - 1]->script_init_env (""); |
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96 | |
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97 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
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98 | { |
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99 | char ext[16]; |
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100 | snprintf (ext, 16, "_%d", (*c)->conf->id); |
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101 | (*c)->script_init_env (ext); |
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102 | } |
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103 | } |
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104 | |
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105 | inline const char * |
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106 | vpn::script_if_init () |
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107 | { |
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108 | script_init_env (); |
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109 | |
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110 | return tap->if_up (); |
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111 | } |
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112 | |
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113 | inline const char * |
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114 | vpn::script_if_up () |
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115 | { |
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116 | script_init_env (); |
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117 | |
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118 | char *filename; |
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119 | asprintf (&filename, |
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120 | "%s/%s", |
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121 | confbase, |
71 | return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; |
122 | ::conf.script_if_up ? ::conf.script_if_up : "if-up"); |
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123 | |
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124 | return filename; |
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125 | } |
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126 | |
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127 | int |
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128 | vpn::setup_socket (u8 prot, int family, int type, int proto) |
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129 | { |
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130 | int fd = socket (family, type, proto); |
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131 | |
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132 | if (fd < 0) |
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133 | { |
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134 | slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno)); |
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135 | return fd; |
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136 | } |
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137 | |
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138 | fcntl (fd, F_SETFL, O_NONBLOCK); |
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139 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
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140 | |
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141 | #ifdef SO_MARK |
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142 | if (::conf.nfmark) |
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143 | if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark)) |
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144 | slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno)); |
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145 | #endif |
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146 | |
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147 | return fd; |
72 | } |
148 | } |
73 | |
149 | |
74 | int |
150 | int |
75 | vpn::setup () |
151 | vpn::setup () |
76 | { |
152 | { |
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153 | int success = 0; |
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154 | |
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155 | ipv4_tos = -1; |
77 | ipv4_fd = -1; |
156 | ipv4_fd = -1; |
78 | |
157 | |
79 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
158 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
80 | { |
159 | { |
81 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
160 | ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto); |
82 | |
161 | |
83 | if (ipv4_fd < 0) |
162 | if (ipv4_fd < 0) |
84 | return -1; |
163 | return -1; |
85 | |
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86 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
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87 | |
164 | |
88 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
165 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
89 | // this I really consider a linux bug. I am neither connected |
166 | // this I really consider a linux bug. I am neither connected |
90 | // nor do I fragment myself. Linux still sets DF and doesn't |
167 | // nor do I fragment myself. Linux still sets DF and doesn't |
91 | // fragment for me sometimes. |
168 | // fragment for me sometimes. |
… | |
… | |
97 | |
174 | |
98 | sockinfo si (THISNODE, PROT_IPv4); |
175 | sockinfo si (THISNODE, PROT_IPv4); |
99 | |
176 | |
100 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
177 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
101 | { |
178 | { |
102 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
179 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
103 | exit (EXIT_FAILURE); |
180 | return -1; |
104 | } |
181 | } |
105 | |
182 | |
106 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
183 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
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184 | ++success; |
107 | } |
185 | } |
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186 | else |
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187 | THISNODE->protocols &= ~PROT_IPv4; |
108 | |
188 | |
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189 | udpv4_tos = -1; |
109 | udpv4_fd = -1; |
190 | udpv4_fd = -1; |
110 | |
191 | |
111 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
192 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
112 | { |
193 | { |
113 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
194 | udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
114 | |
195 | |
115 | if (udpv4_fd < 0) |
196 | if (udpv4_fd < 0) |
116 | return -1; |
197 | return -1; |
117 | |
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118 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
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119 | |
198 | |
120 | // standard daemon practise... |
199 | // standard daemon practise... |
121 | { |
200 | { |
122 | int oval = 1; |
201 | int oval = 1; |
123 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
202 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
135 | |
214 | |
136 | sockinfo si (THISNODE, PROT_UDPv4); |
215 | sockinfo si (THISNODE, PROT_UDPv4); |
137 | |
216 | |
138 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
217 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
139 | { |
218 | { |
140 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
219 | slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
141 | exit (EXIT_FAILURE); |
220 | return -1; |
142 | } |
221 | } |
143 | |
222 | |
144 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
223 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
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224 | ++success; |
145 | } |
225 | } |
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226 | else |
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227 | THISNODE->protocols &= ~PROT_UDPv4; |
146 | |
228 | |
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229 | icmpv4_tos = -1; |
147 | icmpv4_fd = -1; |
230 | icmpv4_fd = -1; |
148 | |
231 | |
149 | #if ENABLE_ICMP |
232 | #if ENABLE_ICMP |
150 | if (THISNODE->protocols & PROT_ICMPv4) |
233 | if (THISNODE->protocols & PROT_ICMPv4) |
151 | { |
234 | { |
152 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
235 | icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP); |
153 | |
236 | |
154 | if (icmpv4_fd < 0) |
237 | if (icmpv4_fd < 0) |
155 | return -1; |
238 | return -1; |
156 | |
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157 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
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158 | |
239 | |
159 | #ifdef ICMP_FILTER |
240 | #ifdef ICMP_FILTER |
160 | { |
241 | { |
161 | icmp_filter oval; |
242 | icmp_filter oval; |
162 | oval.data = 0xffffffff; |
243 | oval.data = 0xffffffff; |
… | |
… | |
171 | // this I really consider a linux bug. I am neither connected |
252 | // this I really consider a linux bug. I am neither connected |
172 | // nor do I fragment myself. Linux still sets DF and doesn't |
253 | // nor do I fragment myself. Linux still sets DF and doesn't |
173 | // fragment for me sometimes. |
254 | // fragment for me sometimes. |
174 | { |
255 | { |
175 | int oval = IP_PMTUDISC_DONT; |
256 | int oval = IP_PMTUDISC_DONT; |
176 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
257 | setsockopt (icmpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
177 | } |
258 | } |
178 | #endif |
259 | #endif |
179 | |
260 | |
180 | sockinfo si (THISNODE, PROT_ICMPv4); |
261 | sockinfo si (THISNODE, PROT_ICMPv4); |
181 | |
262 | |
182 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
263 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
183 | { |
264 | { |
184 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
265 | slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
185 | exit (EXIT_FAILURE); |
266 | return -1; |
186 | } |
267 | } |
187 | |
268 | |
188 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
269 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
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270 | ++success; |
189 | } |
271 | } |
190 | #endif |
272 | #endif |
191 | |
273 | |
192 | tcpv4_fd = -1; |
274 | tcpv4_fd = -1; |
193 | |
275 | |
194 | #if ENABLE_TCP |
276 | #if ENABLE_TCP |
195 | if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port) |
277 | if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port) |
196 | { |
278 | { |
197 | tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); |
279 | tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP); |
198 | |
280 | |
199 | if (tcpv4_fd < 0) |
281 | if (tcpv4_fd < 0) |
200 | return -1; |
282 | return -1; |
201 | |
283 | |
202 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
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203 | |
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204 | // standard daemon practise... |
284 | // standard daemon practise... |
205 | { |
285 | { |
206 | int oval = 1; |
286 | int oval = 1; |
207 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
287 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
208 | } |
288 | } |
209 | |
289 | |
210 | sockinfo si (THISNODE, PROT_TCPv4); |
290 | sockinfo si (THISNODE, PROT_TCPv4); |
211 | |
291 | |
212 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
292 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
213 | { |
293 | { |
214 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
294 | slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
215 | exit (EXIT_FAILURE); |
295 | return -1; |
216 | } |
296 | } |
217 | |
297 | |
218 | if (listen (tcpv4_fd, 5)) |
298 | if (listen (tcpv4_fd, 5)) |
219 | { |
299 | { |
220 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
300 | slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
221 | exit (EXIT_FAILURE); |
301 | return -1; |
222 | } |
302 | } |
223 | |
303 | |
224 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
304 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
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305 | ++success; |
225 | } |
306 | } |
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307 | else |
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308 | THISNODE->protocols &= ~PROT_TCPv4; |
226 | #endif |
309 | #endif |
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310 | |
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311 | dnsv4_tos = -1; |
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312 | dnsv4_fd = -1; |
227 | |
313 | |
228 | #if ENABLE_DNS |
314 | #if ENABLE_DNS |
229 | if (THISNODE->protocols & PROT_DNSv4) |
315 | if (THISNODE->protocols & PROT_DNSv4) |
230 | { |
316 | { |
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317 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
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318 | |
231 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
319 | dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
232 | |
320 | |
233 | if (dnsv4_fd < 0) |
321 | if (dnsv4_fd < 0) |
234 | return -1; |
322 | return -1; |
235 | |
323 | |
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324 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
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325 | // this I really consider a linux bug. I am neither connected |
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326 | // nor do I fragment myself. Linux still sets DF and doesn't |
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327 | // fragment for me sometimes. |
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328 | { |
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329 | int oval = IP_PMTUDISC_DONT; |
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330 | setsockopt (dnsv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
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331 | } |
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332 | # endif |
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333 | |
236 | // standard daemon practise... |
334 | // standard daemon practise... |
237 | { |
335 | { |
238 | int oval = 1; |
336 | int oval = 1; |
239 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
337 | setsockopt (dnsv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
240 | } |
338 | } |
241 | |
339 | |
242 | sockinfo si (THISNODE, PROT_DNSv4); |
340 | sockinfo si (THISNODE->dns_hostname, |
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341 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
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342 | PROT_DNSv4); |
243 | |
343 | |
244 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
344 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
245 | { |
345 | { |
246 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
346 | slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
247 | exit (EXIT_FAILURE); |
347 | return -1; |
248 | } |
348 | } |
249 | |
349 | |
250 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
350 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
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351 | ++success; |
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352 | } |
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353 | #endif |
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354 | |
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355 | ///////////////////////////////////////////////////////////////////////////// |
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356 | |
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357 | if (!success) |
251 | } |
358 | { |
252 | #endif |
359 | slog (L_ERR, _("no protocols enabled.")); |
|
|
360 | return -1; |
|
|
361 | } |
|
|
362 | |
|
|
363 | reconnect_all (); |
|
|
364 | |
|
|
365 | ///////////////////////////////////////////////////////////////////////////// |
253 | |
366 | |
254 | tap = new tap_device (); |
367 | tap = new tap_device (); |
255 | if (!tap) //D this, of course, never catches |
368 | if (!tap) //D this, of course, never catches |
256 | { |
369 | { |
257 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
370 | slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname); |
258 | exit (EXIT_FAILURE); |
371 | return -1; |
259 | } |
372 | } |
260 | |
373 | |
261 | run_script (run_script_cb (this, &vpn::script_if_up), true); |
374 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
262 | |
375 | |
|
|
376 | run_script_cb cb; |
|
|
377 | cb.set<vpn, &vpn::script_if_init> (this); |
|
|
378 | |
|
|
379 | if (tap->if_up () && |
|
|
380 | !run_script (cb, true)) |
|
|
381 | { |
|
|
382 | slog (L_ERR, _("interface initialization command '%s' failed."), |
|
|
383 | tap->if_up ()); |
|
|
384 | return -1; |
|
|
385 | } |
|
|
386 | |
|
|
387 | cb.set<vpn, &vpn::script_if_up> (this); |
|
|
388 | if (!run_script (cb, true)) |
|
|
389 | { |
|
|
390 | slog (L_ERR, _("if-up command execution failed.")); |
|
|
391 | return -1; |
|
|
392 | } |
|
|
393 | |
263 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
394 | tap_ev_watcher.start (tap->fd, EV_READ); |
264 | |
|
|
265 | reconnect_all (); |
|
|
266 | |
395 | |
267 | return 0; |
396 | return 0; |
268 | } |
397 | } |
269 | |
398 | |
270 | // send a vpn packet out to other hosts |
|
|
271 | bool |
399 | bool |
272 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
400 | vpn::drop_privileges () |
273 | { |
401 | { |
274 | switch (si.prot) |
402 | if (::conf.change_root) |
|
|
403 | { |
|
|
404 | if (!strcmp (::conf.change_root, "/")) |
|
|
405 | { |
|
|
406 | char dir [L_tmpnam]; |
|
|
407 | if (!tmpnam (dir)) |
|
|
408 | { |
|
|
409 | slog (L_CRIT, _("unable to create anonymous root path.")); |
|
|
410 | return false; |
|
|
411 | } |
|
|
412 | |
|
|
413 | if (mkdir (dir, 0700)) |
|
|
414 | { |
|
|
415 | slog (L_CRIT, _("unable to crate anonymous root directory.")); |
|
|
416 | return false; |
|
|
417 | } |
|
|
418 | |
|
|
419 | if (chdir (dir)) |
|
|
420 | { |
|
|
421 | slog (L_CRIT, _("unable to change to anonymous root directory.")); |
|
|
422 | return false; |
|
|
423 | } |
|
|
424 | |
|
|
425 | if (rmdir (dir)) |
|
|
426 | slog (L_ERR, _("unable to remove anonymous root directory, continuing.")); |
|
|
427 | } |
|
|
428 | else |
|
|
429 | { |
|
|
430 | if (chdir (::conf.change_root)) |
|
|
431 | { |
|
|
432 | slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root); |
|
|
433 | return false; |
|
|
434 | } |
|
|
435 | } |
|
|
436 | |
|
|
437 | if (chroot (".")) |
|
|
438 | { |
|
|
439 | slog (L_CRIT, _("unable to set new root directory.")); |
|
|
440 | return false; |
|
|
441 | } |
|
|
442 | |
|
|
443 | if (chdir ("/")) |
|
|
444 | { |
|
|
445 | slog (L_CRIT, _("unable to set cwd to new root directory.")); |
|
|
446 | return false; |
|
|
447 | } |
|
|
448 | } |
|
|
449 | |
|
|
450 | if (::conf.change_gid) |
|
|
451 | if (setgid (::conf.change_gid)) |
275 | { |
452 | { |
276 | case PROT_IPv4: |
453 | slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid); |
277 | return send_ipv4_packet (pkt, si, tos); |
|
|
278 | |
|
|
279 | case PROT_UDPv4: |
|
|
280 | return send_udpv4_packet (pkt, si, tos); |
|
|
281 | |
|
|
282 | #if ENABLE_TCP |
|
|
283 | case PROT_TCPv4: |
|
|
284 | return send_tcpv4_packet (pkt, si, tos); |
|
|
285 | #endif |
|
|
286 | |
|
|
287 | #if ENABLE_ICMP |
|
|
288 | case PROT_ICMPv4: |
|
|
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); |
|
|
295 | #endif |
|
|
296 | |
|
|
297 | default: |
|
|
298 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
|
|
299 | return false; |
454 | return false; |
300 | } |
455 | } |
|
|
456 | |
|
|
457 | if (::conf.change_uid) |
|
|
458 | if (setuid (::conf.change_uid)) |
|
|
459 | { |
|
|
460 | slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid); |
|
|
461 | return false; |
|
|
462 | } |
|
|
463 | |
|
|
464 | return true; |
301 | } |
465 | } |
302 | |
466 | |
303 | bool |
467 | bool |
304 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
468 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
305 | { |
469 | { |
306 | #if defined(SOL_IP) && defined(IP_TOS) |
470 | 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 ()); |
471 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
310 | |
472 | |
311 | return true; |
473 | return true; |
312 | } |
474 | } |
313 | |
475 | |
… | |
… | |
336 | |
498 | |
337 | #if ENABLE_ICMP |
499 | #if ENABLE_ICMP |
338 | bool |
500 | bool |
339 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
501 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
340 | { |
502 | { |
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); |
503 | pkt->unshift_hdr (4); |
346 | |
504 | |
347 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
505 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
348 | hdr->type = ::conf.icmp_type; |
506 | hdr->type = ::conf.icmp_type; |
349 | hdr->code = 255; |
507 | hdr->code = 255; |
350 | hdr->checksum = 0; |
508 | hdr->checksum = 0; |
351 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
509 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
352 | |
510 | |
|
|
511 | set_tos (icmpv4_fd, icmpv4_tos, tos); |
353 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
512 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
354 | |
513 | |
355 | return true; |
514 | return true; |
356 | } |
515 | } |
357 | #endif |
516 | #endif |
358 | |
517 | |
359 | bool |
518 | bool |
360 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
519 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
361 | { |
520 | { |
362 | #if defined(SOL_IP) && defined(IP_TOS) |
521 | 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 ()); |
522 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
366 | |
523 | |
367 | return true; |
524 | return true; |
368 | } |
525 | } |
369 | |
526 | |
… | |
… | |
380 | { |
537 | { |
381 | // broadcast, this is ugly, but due to the security policy |
538 | // broadcast, this is ugly, but due to the security policy |
382 | // we have to connect to all hosts... |
539 | // we have to connect to all hosts... |
383 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
540 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
384 | if ((*c)->conf != THISNODE) |
541 | if ((*c)->conf != THISNODE) |
385 | (*c)->inject_data_packet (pkt, true); |
542 | (*c)->inject_data_packet (pkt); |
386 | } |
543 | } |
387 | } |
544 | } |
388 | |
545 | |
389 | void |
546 | void |
390 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
547 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
391 | { |
548 | { |
392 | unsigned int src = pkt->src (); |
549 | unsigned int src = pkt->src (); |
393 | unsigned int dst = pkt->dst (); |
550 | unsigned int dst = pkt->dst (); |
394 | |
551 | |
395 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"), |
552 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."), |
396 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
553 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
397 | |
554 | |
398 | if (src == 0 || src > conns.size () |
555 | if (src == 0 || src > conns.size () |
399 | || dst > conns.size () |
556 | || dst > conns.size () |
400 | || pkt->typ () >= vpn_packet::PT_MAX) |
557 | || pkt->typ () >= vpn_packet::PT_MAX) |
401 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
558 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
402 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
|
|
403 | else if (dst > conns.size ()) |
|
|
404 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
|
|
405 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
559 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
406 | else |
560 | else |
407 | { |
561 | { |
408 | connection *c = conns[src - 1]; |
562 | connection *c = conns[src - 1]; |
409 | |
563 | |
410 | if (dst == 0) |
564 | if (dst == 0) |
411 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
565 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."), |
412 | c->conf->nodename, (const char *)rsi); |
566 | c->conf->nodename, (const char *)rsi); |
413 | else if (dst != THISNODE->id) |
567 | else if (dst != THISNODE->id) |
414 | { |
568 | { |
415 | if (THISNODE->routerprio) |
569 | if (THISNODE->routerprio) |
416 | // the tos setting gets lost here. who cares. |
570 | // the tos setting gets lost here. who cares. |
417 | conns[dst - 1]->inject_vpn_packet (pkt); |
571 | conns[dst - 1]->inject_vpn_packet (pkt); |
418 | else |
572 | else |
419 | slog (L_WARN, |
573 | slog (L_WARN, |
420 | _("%s(%s): forwarding request (=> %s), but we are no router"), |
574 | _("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."), |
421 | c->conf->nodename, (const char *)rsi, |
575 | c->conf->nodename, (const char *)rsi, |
422 | conns[dst - 1]->conf->nodename); |
576 | conns[dst - 1]->conf->nodename); |
423 | } |
577 | } |
424 | else |
578 | else |
425 | c->recv_vpn_packet (pkt, rsi); |
579 | c->recv_vpn_packet (pkt, rsi); |
426 | } |
580 | } |
427 | } |
581 | } |
428 | |
582 | |
429 | void |
583 | bool |
|
|
584 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
585 | { |
|
|
586 | switch (si.prot) |
|
|
587 | { |
|
|
588 | case PROT_IPv4: |
|
|
589 | return send_ipv4_packet (pkt, si, tos); |
|
|
590 | |
|
|
591 | case PROT_UDPv4: |
|
|
592 | return send_udpv4_packet (pkt, si, tos); |
|
|
593 | |
|
|
594 | #if ENABLE_TCP |
|
|
595 | case PROT_TCPv4: |
|
|
596 | return send_tcpv4_packet (pkt, si, tos); |
|
|
597 | #endif |
|
|
598 | #if ENABLE_ICMP |
|
|
599 | case PROT_ICMPv4: |
|
|
600 | return send_icmpv4_packet (pkt, si, tos); |
|
|
601 | #endif |
|
|
602 | #if ENABLE_DNS |
|
|
603 | case PROT_DNSv4: |
|
|
604 | return send_dnsv4_packet (pkt, si, tos); |
|
|
605 | #endif |
|
|
606 | default: |
|
|
607 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
|
|
608 | } |
|
|
609 | |
|
|
610 | return false; |
|
|
611 | } |
|
|
612 | |
|
|
613 | inline void |
430 | vpn::ipv4_ev (io_watcher &w, short revents) |
614 | vpn::ipv4_ev (ev::io &w, int revents) |
431 | { |
615 | { |
432 | if (revents & EVENT_READ) |
616 | if (revents & EV_READ) |
433 | { |
617 | { |
434 | vpn_packet *pkt = new vpn_packet; |
618 | vpn_packet *pkt = new vpn_packet; |
435 | struct sockaddr_in sa; |
619 | struct sockaddr_in sa; |
436 | socklen_t sa_len = sizeof (sa); |
620 | socklen_t sa_len = sizeof (sa); |
437 | int len; |
621 | int len; |
… | |
… | |
442 | |
626 | |
443 | if (len > 0) |
627 | if (len > 0) |
444 | { |
628 | { |
445 | pkt->len = len; |
629 | pkt->len = len; |
446 | |
630 | |
447 | // raw sockets deliver the ipv4, but don't expect it on sends |
631 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
448 | // this is slow, but... |
632 | pkt->skip_hdr (pkt->ipv4_hdr_len ()); |
449 | pkt->skip_hdr (IP_OVERHEAD); |
|
|
450 | |
633 | |
451 | recv_vpn_packet (pkt, si); |
634 | recv_vpn_packet (pkt, si); |
452 | } |
635 | } |
453 | else |
636 | else |
454 | { |
637 | { |
455 | // probably ECONNRESET or somesuch |
638 | // probably ECONNRESET or somesuch |
456 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
639 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
457 | } |
640 | } |
458 | |
641 | |
459 | delete pkt; |
642 | delete pkt; |
460 | } |
643 | } |
461 | else |
644 | else |
462 | { |
645 | { |
463 | slog (L_ERR, |
646 | slog (L_ERR, |
464 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
647 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
465 | revents); |
648 | revents); |
466 | exit (EXIT_FAILURE); |
649 | exit (EXIT_FAILURE); |
467 | } |
650 | } |
468 | } |
651 | } |
469 | |
652 | |
470 | #if ENABLE_ICMP |
653 | #if ENABLE_ICMP |
471 | void |
654 | inline void |
472 | vpn::icmpv4_ev (io_watcher &w, short revents) |
655 | vpn::icmpv4_ev (ev::io &w, int revents) |
473 | { |
656 | { |
474 | if (revents & EVENT_READ) |
657 | if (revents & EV_READ) |
475 | { |
658 | { |
476 | vpn_packet *pkt = new vpn_packet; |
659 | vpn_packet *pkt = new vpn_packet; |
477 | struct sockaddr_in sa; |
660 | struct sockaddr_in sa; |
478 | socklen_t sa_len = sizeof (sa); |
661 | socklen_t sa_len = sizeof (sa); |
479 | int len; |
662 | int len; |
… | |
… | |
491 | if (hdr->type == ::conf.icmp_type |
674 | if (hdr->type == ::conf.icmp_type |
492 | && hdr->code == 255) |
675 | && hdr->code == 255) |
493 | { |
676 | { |
494 | // raw sockets deliver the ipv4, but don't expect it on sends |
677 | // raw sockets deliver the ipv4, but don't expect it on sends |
495 | // this is slow, but... |
678 | // this is slow, but... |
496 | pkt->skip_hdr (ICMP_OVERHEAD); |
679 | pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD)); |
497 | |
680 | |
498 | recv_vpn_packet (pkt, si); |
681 | recv_vpn_packet (pkt, si); |
499 | } |
682 | } |
500 | } |
683 | } |
501 | else |
684 | else |
502 | { |
685 | { |
503 | // probably ECONNRESET or somesuch |
686 | // probably ECONNRESET or somesuch |
504 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
687 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
505 | } |
688 | } |
506 | |
689 | |
507 | delete pkt; |
690 | delete pkt; |
508 | } |
691 | } |
509 | else |
692 | else |
510 | { |
693 | { |
511 | slog (L_ERR, |
694 | slog (L_ERR, |
512 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
695 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
513 | revents); |
696 | revents); |
514 | exit (EXIT_FAILURE); |
697 | exit (EXIT_FAILURE); |
515 | } |
698 | } |
516 | } |
699 | } |
517 | #endif |
700 | #endif |
518 | |
701 | |
519 | void |
702 | inline void |
520 | vpn::udpv4_ev (io_watcher &w, short revents) |
703 | vpn::udpv4_ev (ev::io &w, int revents) |
521 | { |
704 | { |
522 | if (revents & EVENT_READ) |
705 | if (revents & EV_READ) |
523 | { |
706 | { |
524 | vpn_packet *pkt = new vpn_packet; |
707 | vpn_packet *pkt = new vpn_packet; |
525 | struct sockaddr_in sa; |
708 | struct sockaddr_in sa; |
526 | socklen_t sa_len = sizeof (sa); |
709 | socklen_t sa_len = sizeof (sa); |
527 | int len; |
710 | int len; |
… | |
… | |
537 | recv_vpn_packet (pkt, si); |
720 | recv_vpn_packet (pkt, si); |
538 | } |
721 | } |
539 | else |
722 | else |
540 | { |
723 | { |
541 | // probably ECONNRESET or somesuch |
724 | // probably ECONNRESET or somesuch |
542 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
725 | slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno)); |
543 | } |
726 | } |
544 | |
727 | |
545 | delete pkt; |
728 | delete pkt; |
546 | } |
729 | } |
547 | else |
730 | else |
548 | { |
731 | { |
549 | slog (L_ERR, |
732 | slog (L_ERR, |
550 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
733 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
551 | revents); |
734 | revents); |
552 | exit (EXIT_FAILURE); |
735 | exit (EXIT_FAILURE); |
553 | } |
736 | } |
554 | } |
737 | } |
555 | |
738 | |
556 | void |
739 | inline void |
557 | vpn::tap_ev (io_watcher &w, short revents) |
740 | vpn::tap_ev (ev::io &w, int revents) |
558 | { |
741 | { |
559 | if (revents & EVENT_READ) |
742 | if (revents & EV_READ) |
560 | { |
743 | { |
561 | /* process data */ |
744 | /* process data */ |
562 | tap_packet *pkt; |
745 | tap_packet *pkt; |
563 | |
746 | |
564 | pkt = tap->recv (); |
747 | pkt = tap->recv (); |
… | |
… | |
571 | int dst = mac2id (pkt->dst); |
754 | int dst = mac2id (pkt->dst); |
572 | int src = mac2id (pkt->src); |
755 | int src = mac2id (pkt->src); |
573 | |
756 | |
574 | if (src != THISNODE->id) |
757 | if (src != THISNODE->id) |
575 | { |
758 | { |
576 | slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting.")); |
759 | slog (L_ERR, _("FATAL: tap packet not originating on current node received (if-up script not working properly?), exiting.")); |
577 | exit (EXIT_FAILURE); |
760 | exit (EXIT_FAILURE); |
578 | } |
761 | } |
579 | |
762 | |
580 | if (dst == THISNODE->id) |
763 | if (dst == THISNODE->id) |
581 | { |
764 | { |
… | |
… | |
593 | } |
776 | } |
594 | else |
777 | else |
595 | abort (); |
778 | abort (); |
596 | } |
779 | } |
597 | |
780 | |
598 | void |
781 | inline void |
599 | vpn::event_cb (time_watcher &w) |
782 | vpn::event_cb (ev::timer &w, int) |
600 | { |
783 | { |
601 | if (events) |
784 | if (events) |
602 | { |
785 | { |
603 | if (events & EVENT_SHUTDOWN) |
786 | if (events & EVENT_SHUTDOWN) |
604 | { |
787 | { |
605 | slog (L_INFO, _("preparing shutdown...")); |
788 | slog (L_INFO, _("preparing shutdown...")); |
606 | |
789 | |
607 | shutdown_all (); |
790 | shutdown_all (); |
608 | remove_pid (conf.pidfilename); |
791 | remove_pid (conf.pidfilename); |
609 | slog (L_INFO, _("terminating")); |
792 | slog (L_INFO, _("exiting.")); |
610 | exit (EXIT_SUCCESS); |
793 | exit (EXIT_SUCCESS); |
611 | } |
794 | } |
612 | |
795 | |
613 | if (events & EVENT_RECONNECT) |
796 | if (events & EVENT_RECONNECT) |
614 | { |
797 | { |
615 | slog (L_INFO, _("forced reconnect")); |
798 | slog (L_INFO, _("forced reconnect.")); |
616 | |
799 | |
617 | reconnect_all (); |
800 | reconnect_all (); |
618 | } |
801 | } |
619 | |
802 | |
620 | events = 0; |
803 | events = 0; |
… | |
… | |
636 | |
819 | |
637 | conns.clear (); |
820 | conns.clear (); |
638 | |
821 | |
639 | connection_init (); |
822 | connection_init (); |
640 | |
823 | |
641 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
824 | for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i) |
642 | i != conf.nodes.end (); ++i) |
825 | conns.push_back (new connection (this, *i)); |
643 | { |
|
|
644 | connection *conn = new connection (this); |
|
|
645 | |
826 | |
646 | conn->conf = *i; |
827 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
647 | conns.push_back (conn); |
|
|
648 | |
|
|
649 | conn->establish_connection (); |
828 | (*c)->establish_connection (); |
650 | } |
|
|
651 | } |
829 | } |
652 | |
830 | |
653 | connection *vpn::find_router () |
831 | bool |
|
|
832 | vpn::can_direct (conf_node *src, conf_node *dst) const |
654 | { |
833 | { |
655 | u32 prio = 1; |
834 | return src != dst |
|
|
835 | && src->may_direct (dst) |
|
|
836 | && dst->may_direct (src) |
|
|
837 | && (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS) |
|
|
838 | || (src->protocols & dst->connectable_protocols ())); |
|
|
839 | } |
|
|
840 | |
|
|
841 | // only works for indirect and routed connections: find a router |
|
|
842 | // from THISNODE to dst |
|
|
843 | connection * |
|
|
844 | vpn::find_router_for (const connection *dst) |
|
|
845 | { |
656 | connection *router = 0; |
846 | connection *router = 0; |
657 | |
847 | |
|
|
848 | // first try to find a router with a direct connection, route there |
|
|
849 | // regardless of any other considerations. |
|
|
850 | { |
|
|
851 | u32 prio = 1; |
|
|
852 | |
|
|
853 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
854 | { |
|
|
855 | connection *c = *i; |
|
|
856 | |
|
|
857 | if (c->conf->routerprio > prio |
|
|
858 | && c->conf != THISNODE |
|
|
859 | && can_direct (c->conf, dst->conf) |
|
|
860 | && c->ictx && c->octx) |
|
|
861 | { |
|
|
862 | prio = c->conf->routerprio; |
|
|
863 | router = c; |
|
|
864 | } |
|
|
865 | } |
|
|
866 | } |
|
|
867 | |
|
|
868 | if (router) |
|
|
869 | return router; |
|
|
870 | |
|
|
871 | // second try find the router with the highest priority, higher than ours |
|
|
872 | { |
|
|
873 | u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1; |
|
|
874 | |
|
|
875 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
876 | { |
|
|
877 | connection *c = *i; |
|
|
878 | |
|
|
879 | if (c->conf->routerprio > prio |
|
|
880 | && c != dst |
|
|
881 | && c->conf != THISNODE |
|
|
882 | && c->ictx && c->octx) |
|
|
883 | { |
|
|
884 | prio = c->conf->routerprio; |
|
|
885 | router = c; |
|
|
886 | } |
|
|
887 | } |
|
|
888 | } |
|
|
889 | |
|
|
890 | return router; |
|
|
891 | } |
|
|
892 | |
|
|
893 | void |
|
|
894 | vpn::connection_established (connection *c) |
|
|
895 | { |
658 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
896 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
659 | { |
897 | { |
660 | connection *c = *i; |
898 | connection *o = *i; |
661 | |
899 | |
662 | if (c->conf->routerprio > prio |
900 | if (!o->is_direct |
663 | && c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use |
901 | && o->si.valid () |
664 | && c->ictx && c->octx |
902 | && c->si != o->si |
665 | && c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode |
903 | && c == find_router_for (o)) |
666 | { |
|
|
667 | prio = c->conf->routerprio; |
|
|
668 | router = c; |
|
|
669 | } |
904 | { |
|
|
905 | slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."), |
|
|
906 | o->conf->nodename, c->conf->nodename); |
|
|
907 | o->rekey (); |
|
|
908 | } |
670 | } |
909 | } |
671 | |
|
|
672 | return router; |
|
|
673 | } |
910 | } |
674 | |
911 | |
|
|
912 | void |
675 | void vpn::send_connect_request (int id) |
913 | vpn::send_connect_request (connection *c) |
676 | { |
914 | { |
677 | connection *c = find_router (); |
915 | connection *r = find_router_for (c); |
678 | |
916 | |
679 | if (c) |
917 | if (r) |
|
|
918 | { |
|
|
919 | slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."), |
|
|
920 | c->conf->nodename, r->conf->nodename); |
680 | c->send_connect_request (id); |
921 | r->send_connect_request (c->conf->id); |
|
|
922 | } |
681 | else |
923 | else |
682 | // no router found, aggressively connect to all routers |
924 | slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."), |
683 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
925 | c->conf->nodename); |
684 | if ((*i)->conf->routerprio && (*i)->conf != THISNODE) |
|
|
685 | (*i)->establish_connection (); |
|
|
686 | } |
926 | } |
687 | |
927 | |
688 | void |
928 | void |
689 | connection::dump_status () |
929 | connection::dump_status () |
690 | { |
930 | { |
691 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
931 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
692 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
932 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
693 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
933 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
694 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
934 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
695 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
935 | (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 | } |
936 | } |
699 | |
937 | |
700 | void |
938 | void |
701 | vpn::dump_status () |
939 | vpn::dump_status () |
702 | { |
940 | { |
703 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW); |
941 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ()); |
704 | |
942 | |
705 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
943 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
706 | (*c)->dump_status (); |
944 | (*c)->dump_status (); |
707 | |
945 | |
708 | slog (L_NOTICE, _("END status dump")); |
946 | slog (L_NOTICE, _("END status dump")); |
709 | } |
947 | } |
710 | |
948 | |
711 | vpn::vpn (void) |
949 | vpn::vpn (void) |
|
|
950 | { |
712 | : event (this, &vpn::event_cb) |
951 | event .set<vpn, &vpn::event_cb > (this); |
713 | , udpv4_ev_watcher (this, &vpn::udpv4_ev) |
952 | udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
714 | , ipv4_ev_watcher (this, &vpn::ipv4_ev) |
953 | ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
715 | #if ENABLE_TCP |
954 | #if ENABLE_TCP |
716 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
955 | tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
717 | #endif |
956 | #endif |
718 | #if ENABLE_ICMP |
957 | #if ENABLE_ICMP |
719 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
958 | icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |
720 | #endif |
959 | #endif |
721 | #if ENABLE_DNS |
960 | #if ENABLE_DNS |
722 | , dnsv4_ev_watcher (this, &vpn::dnsv4_ev) |
961 | dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this); |
723 | #endif |
962 | #endif |
724 | , tap_ev_watcher (this, &vpn::tap_ev) |
963 | tap_ev_watcher .set<vpn, &vpn::tap_ev > (this); |
725 | { |
|
|
726 | } |
964 | } |
727 | |
965 | |
728 | vpn::~vpn () |
966 | vpn::~vpn () |
729 | { |
967 | { |
730 | } |
968 | } |