1 | /* |
1 | /* |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2003-2008,2010,2011,2013 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
5 | This file is part of GVPE. |
5 | This file is part of GVPE. |
6 | |
6 | |
7 | GVPE is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify it |
8 | 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 |
9 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
10 | (at your option) any later version. |
10 | option) any later version. |
11 | |
11 | |
12 | 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 |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
15 | GNU General Public License for more details. |
15 | Public License for more details. |
16 | |
16 | |
17 | 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 |
18 | along with gvpe; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
19 | 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. |
20 | */ |
30 | */ |
21 | |
31 | |
22 | #include "config.h" |
32 | #include "config.h" |
23 | |
33 | |
24 | #include <list> |
34 | #include <list> |
… | |
… | |
28 | #include <cstdlib> |
38 | #include <cstdlib> |
29 | |
39 | |
30 | #include <sys/types.h> |
40 | #include <sys/types.h> |
31 | #include <sys/socket.h> |
41 | #include <sys/socket.h> |
32 | #include <sys/wait.h> |
42 | #include <sys/wait.h> |
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43 | #include <sys/stat.h> |
33 | #include <errno.h> |
44 | #include <errno.h> |
34 | #include <time.h> |
45 | #include <time.h> |
35 | #include <unistd.h> |
46 | #include <unistd.h> |
36 | #include <fcntl.h> |
47 | #include <fcntl.h> |
37 | #include <sys/socket.h> |
48 | #include <sys/socket.h> |
… | |
… | |
42 | |
53 | |
43 | #include "connection.h" |
54 | #include "connection.h" |
44 | #include "util.h" |
55 | #include "util.h" |
45 | #include "vpn.h" |
56 | #include "vpn.h" |
46 | |
57 | |
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58 | using namespace std; |
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59 | |
47 | vpn network; // THE vpn (bad design...) |
60 | vpn network; // THE vpn (bad design...) |
48 | |
61 | |
49 | ///////////////////////////////////////////////////////////////////////////// |
62 | ///////////////////////////////////////////////////////////////////////////// |
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63 | |
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64 | // hopefully temporary workaround for rare buffer full conditions |
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65 | // if it happens, usually instantly retrying or retrying ~5ms later |
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66 | // is good enough with current network technologies/kernels |
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67 | |
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68 | static ssize_t |
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69 | xsendto (int fd, const void *buf, size_t len, int flags, |
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70 | const struct sockaddr *sa, socklen_t salen) |
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71 | { |
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72 | ssize_t res; |
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73 | |
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74 | for (int retry = 0; retry <= 13; ++retry) // ~100ms |
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75 | { |
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76 | res = sendto (fd, buf, len, flags, sa, salen); |
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77 | |
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78 | if (res >= 0 || errno != ENOBUFS) |
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79 | break; |
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80 | |
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81 | struct timespec ts = { 0, 1000 * retry }; |
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82 | nanosleep (&ts, 0); |
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83 | } |
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84 | |
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85 | return res; |
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86 | } |
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87 | |
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88 | ///////////////////////////////////////////////////////////////////////////// |
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89 | |
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90 | static void inline |
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91 | set_tos (int fd, int &tos_prev, int tos) |
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92 | { |
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93 | #if defined(SOL_IP) && defined(IP_TOS) |
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94 | if (tos_prev == tos) |
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95 | return; |
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96 | |
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97 | tos_prev = tos; |
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98 | setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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99 | #endif |
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100 | } |
50 | |
101 | |
51 | void |
102 | void |
52 | vpn::script_init_env () |
103 | vpn::script_init_env () |
53 | { |
104 | { |
54 | // the tunnel device mtu should be the physical mtu - overhead |
105 | // the tunnel device mtu should be the physical mtu - overhead |
55 | // the tricky part is rounding to the cipher key blocksize |
106 | // the tricky part is rounding to the cipher key blocksize |
56 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
107 | int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
57 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
108 | mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
58 | mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
109 | mtu -= mtu % BLOCK_SIZE (CIPHER); // round |
59 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
110 | mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
60 | |
111 | |
61 | char *env; |
112 | char *env; |
62 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
113 | asprintf (&env, "CONFBASE=%s", confbase); putenv (env); |
63 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
114 | asprintf (&env, "IFNAME=%s", tap->interface ()); putenv (env); |
… | |
… | |
75 | snprintf (ext, 16, "_%d", (*c)->conf->id); |
126 | snprintf (ext, 16, "_%d", (*c)->conf->id); |
76 | (*c)->script_init_env (ext); |
127 | (*c)->script_init_env (ext); |
77 | } |
128 | } |
78 | } |
129 | } |
79 | |
130 | |
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131 | inline const char * |
80 | const char *vpn::script_if_init () |
132 | vpn::script_if_init () |
81 | { |
133 | { |
82 | script_init_env (); |
134 | script_init_env (); |
83 | |
135 | |
84 | return tap->if_up (); |
136 | return tap->if_up (); |
85 | } |
137 | } |
86 | |
138 | |
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139 | inline const char * |
87 | const char *vpn::script_if_up () |
140 | vpn::script_if_up () |
88 | { |
141 | { |
89 | script_init_env (); |
142 | script_init_env (); |
90 | |
143 | |
91 | char *filename; |
144 | return conf.config_filename (::conf.script_if_up, "if-up"); |
92 | asprintf (&filename, |
145 | } |
93 | "%s/%s", |
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94 | confbase, |
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95 | ::conf.script_if_up ? ::conf.script_if_up : "if-up"); |
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96 | |
146 | |
97 | return filename; |
147 | int |
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148 | vpn::setup_socket (u8 prot, int family, int type, int proto) |
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149 | { |
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150 | int fd = socket (family, type, proto); |
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151 | |
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152 | if (fd < 0) |
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153 | { |
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154 | slog (L_ERR, _("unable to create %s socket: %s."), strprotocol (prot), strerror (errno)); |
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155 | return fd; |
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156 | } |
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157 | |
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158 | fcntl (fd, F_SETFL, O_NONBLOCK); |
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159 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
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160 | |
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161 | #ifdef SO_MARK |
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162 | if (::conf.nfmark) |
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163 | if (setsockopt (fd, SOL_SOCKET, SO_MARK, &::conf.nfmark, sizeof ::conf.nfmark)) |
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164 | slog (L_WARN, _("unable to set nfmark on %s socket: %s"), strprotocol (prot), strerror (errno)); |
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165 | #endif |
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166 | |
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167 | return fd; |
98 | } |
168 | } |
99 | |
169 | |
100 | int |
170 | int |
101 | vpn::setup () |
171 | vpn::setup () |
102 | { |
172 | { |
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173 | int success = 0; |
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174 | |
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175 | ipv4_tos = -1; |
103 | ipv4_fd = -1; |
176 | ipv4_fd = -1; |
104 | |
177 | |
105 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
178 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
106 | { |
179 | { |
107 | ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
180 | ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto); |
108 | |
181 | |
109 | if (ipv4_fd < 0) |
182 | if (ipv4_fd < 0) |
110 | return -1; |
183 | return -1; |
111 | |
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112 | fcntl (ipv4_fd, F_SETFL, O_NONBLOCK); |
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113 | |
184 | |
114 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
185 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
115 | // this I really consider a linux bug. I am neither connected |
186 | // this I really consider a linux bug. I am neither connected |
116 | // nor do I fragment myself. Linux still sets DF and doesn't |
187 | // nor do I fragment myself. Linux still sets DF and doesn't |
117 | // fragment for me sometimes. |
188 | // fragment for me sometimes. |
… | |
… | |
123 | |
194 | |
124 | sockinfo si (THISNODE, PROT_IPv4); |
195 | sockinfo si (THISNODE, PROT_IPv4); |
125 | |
196 | |
126 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
197 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
127 | { |
198 | { |
128 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
199 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
129 | exit (EXIT_FAILURE); |
200 | return -1; |
130 | } |
201 | } |
131 | |
202 | |
132 | ipv4_ev_watcher.start (ipv4_fd, EVENT_READ); |
203 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
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204 | ++success; |
133 | } |
205 | } |
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206 | else |
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207 | THISNODE->protocols &= ~PROT_IPv4; |
134 | |
208 | |
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209 | udpv4_tos = -1; |
135 | udpv4_fd = -1; |
210 | udpv4_fd = -1; |
136 | |
211 | |
137 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
212 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
138 | { |
213 | { |
139 | udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
214 | udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
140 | |
215 | |
141 | if (udpv4_fd < 0) |
216 | if (udpv4_fd < 0) |
142 | return -1; |
217 | return -1; |
143 | |
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144 | fcntl (udpv4_fd, F_SETFL, O_NONBLOCK); |
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145 | |
218 | |
146 | // standard daemon practise... |
219 | // standard daemon practise... |
147 | { |
220 | { |
148 | int oval = 1; |
221 | int oval = 1; |
149 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
222 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
… | |
… | |
161 | |
234 | |
162 | sockinfo si (THISNODE, PROT_UDPv4); |
235 | sockinfo si (THISNODE, PROT_UDPv4); |
163 | |
236 | |
164 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
237 | if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
165 | { |
238 | { |
166 | slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
239 | slog (L_ERR, _("can't bind udpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
167 | exit (EXIT_FAILURE); |
240 | return -1; |
168 | } |
241 | } |
169 | |
242 | |
170 | udpv4_ev_watcher.start (udpv4_fd, EVENT_READ); |
243 | udpv4_ev_watcher.start (udpv4_fd, EV_READ); |
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244 | ++success; |
171 | } |
245 | } |
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246 | else |
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247 | THISNODE->protocols &= ~PROT_UDPv4; |
172 | |
248 | |
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249 | icmpv4_tos = -1; |
173 | icmpv4_fd = -1; |
250 | icmpv4_fd = -1; |
174 | |
251 | |
175 | #if ENABLE_ICMP |
252 | #if ENABLE_ICMP |
176 | if (THISNODE->protocols & PROT_ICMPv4) |
253 | if (THISNODE->protocols & PROT_ICMPv4) |
177 | { |
254 | { |
178 | icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
255 | icmpv4_fd = setup_socket (PROT_ICMPv4, PF_INET, SOCK_RAW, IPPROTO_ICMP); |
179 | |
256 | |
180 | if (icmpv4_fd < 0) |
257 | if (icmpv4_fd < 0) |
181 | return -1; |
258 | return -1; |
182 | |
259 | |
183 | fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK); |
260 | // no clue where trhis is actually defined |
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261 | #if !defined(ICMP_FILTER) && defined(__linux) |
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262 | #define ICMP_FILTER 1 |
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263 | #endif |
184 | |
264 | |
185 | #ifdef ICMP_FILTER |
265 | #ifdef ICMP_FILTER |
186 | { |
266 | { |
187 | icmp_filter oval; |
267 | uint32_t oval; |
188 | oval.data = 0xffffffff; |
268 | oval = 0; |
189 | if (::conf.icmp_type < 32) |
269 | if (::conf.icmp_type < 32) |
190 | oval.data &= ~(1 << ::conf.icmp_type); |
270 | oval |= 1 << ::conf.icmp_type; |
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271 | oval = ~oval; |
191 | |
272 | |
192 | setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval); |
273 | setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval); |
193 | } |
274 | } |
194 | #endif |
275 | #endif |
195 | |
276 | |
… | |
… | |
205 | |
286 | |
206 | sockinfo si (THISNODE, PROT_ICMPv4); |
287 | sockinfo si (THISNODE, PROT_ICMPv4); |
207 | |
288 | |
208 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
289 | if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
209 | { |
290 | { |
210 | slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
291 | slog (L_ERR, _("can't bind icmpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
211 | exit (EXIT_FAILURE); |
292 | return -1; |
212 | } |
293 | } |
213 | |
294 | |
214 | icmpv4_ev_watcher.start (icmpv4_fd, EVENT_READ); |
295 | icmpv4_ev_watcher.start (icmpv4_fd, EV_READ); |
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296 | ++success; |
215 | } |
297 | } |
216 | #endif |
298 | #endif |
217 | |
299 | |
218 | tcpv4_fd = -1; |
300 | tcpv4_fd = -1; |
219 | |
301 | |
220 | #if ENABLE_TCP |
302 | #if ENABLE_TCP |
221 | if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port) |
303 | if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port) |
222 | { |
304 | { |
223 | tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); |
305 | tcpv4_fd = setup_socket (PROT_TCPv4, PF_INET, SOCK_STREAM, IPPROTO_TCP); |
224 | |
306 | |
225 | if (tcpv4_fd < 0) |
307 | if (tcpv4_fd < 0) |
226 | return -1; |
308 | return -1; |
227 | |
309 | |
228 | fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK); |
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229 | |
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230 | // standard daemon practise... |
310 | // standard daemon practise... |
231 | { |
311 | { |
232 | int oval = 1; |
312 | int oval = 1; |
233 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
313 | setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
234 | } |
314 | } |
235 | |
315 | |
236 | sockinfo si (THISNODE, PROT_TCPv4); |
316 | sockinfo si (THISNODE, PROT_TCPv4); |
237 | |
317 | |
238 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
318 | if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
239 | { |
319 | { |
240 | slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
320 | slog (L_ERR, _("can't bind tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
241 | exit (EXIT_FAILURE); |
321 | return -1; |
242 | } |
322 | } |
243 | |
323 | |
244 | if (listen (tcpv4_fd, 5)) |
324 | if (listen (tcpv4_fd, 5)) |
245 | { |
325 | { |
246 | slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
326 | slog (L_ERR, _("can't listen tcpv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
247 | exit (EXIT_FAILURE); |
327 | return -1; |
248 | } |
328 | } |
249 | |
329 | |
250 | tcpv4_ev_watcher.start (tcpv4_fd, EVENT_READ); |
330 | tcpv4_ev_watcher.start (tcpv4_fd, EV_READ); |
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331 | ++success; |
251 | } |
332 | } |
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333 | else |
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334 | THISNODE->protocols &= ~PROT_TCPv4; |
252 | #endif |
335 | #endif |
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336 | |
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337 | dnsv4_tos = -1; |
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338 | dnsv4_fd = -1; |
253 | |
339 | |
254 | #if ENABLE_DNS |
340 | #if ENABLE_DNS |
255 | if (THISNODE->protocols & PROT_DNSv4) |
341 | if (THISNODE->protocols & PROT_DNSv4) |
256 | { |
342 | { |
257 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
343 | dns_forwarder.set (::conf.dns_forw_host, ::conf.dns_forw_port, PROT_DNSv4); |
258 | |
344 | |
259 | dnsv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
345 | dnsv4_fd = setup_socket (PROT_DNSv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
260 | |
346 | |
261 | if (dnsv4_fd < 0) |
347 | if (dnsv4_fd < 0) |
262 | return -1; |
348 | return -1; |
263 | |
349 | |
264 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
350 | # if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
… | |
… | |
281 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
367 | THISNODE->dns_hostname ? THISNODE->dns_port : 0, |
282 | PROT_DNSv4); |
368 | PROT_DNSv4); |
283 | |
369 | |
284 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
370 | if (bind (dnsv4_fd, si.sav4 (), si.salenv4 ())) |
285 | { |
371 | { |
286 | slog (L_ERR, _("can't bind dnsv4 on %s: %s"), (const char *)si, strerror (errno)); |
372 | slog (L_ERR, _("can't bind dnsv4 on %s: %s, exiting."), (const char *)si, strerror (errno)); |
287 | exit (EXIT_FAILURE); |
373 | return -1; |
288 | } |
374 | } |
289 | |
375 | |
290 | dnsv4_ev_watcher.start (dnsv4_fd, EVENT_READ); |
376 | dnsv4_ev_watcher.start (dnsv4_fd, EV_READ); |
|
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377 | ++success; |
291 | } |
378 | } |
292 | #endif |
379 | #endif |
293 | |
380 | |
294 | ///////////////////////////////////////////////////////////////////////////// |
381 | ///////////////////////////////////////////////////////////////////////////// |
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382 | |
|
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383 | if (!success) |
|
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384 | { |
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385 | slog (L_ERR, _("no protocols enabled.")); |
|
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386 | return -1; |
|
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387 | } |
295 | |
388 | |
296 | reconnect_all (); |
389 | reconnect_all (); |
297 | |
390 | |
298 | ///////////////////////////////////////////////////////////////////////////// |
391 | ///////////////////////////////////////////////////////////////////////////// |
299 | |
392 | |
300 | tap = new tap_device (); |
393 | tap = new tap_device (); |
301 | if (!tap) //D this, of course, never catches |
394 | if (!tap) //D this, of course, never catches |
302 | { |
395 | { |
303 | slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
396 | slog (L_ERR, _("cannot create network interface '%s'."), conf.ifname); |
304 | exit (EXIT_FAILURE); |
397 | return -1; |
305 | } |
398 | } |
306 | |
399 | |
|
|
400 | fcntl (tap->fd, F_SETFD, FD_CLOEXEC); |
|
|
401 | |
|
|
402 | run_script_cb cb; |
|
|
403 | cb.set<vpn, &vpn::script_if_init> (this); |
|
|
404 | |
307 | if (tap->if_up () && |
405 | if (tap->if_up () && |
308 | !run_script (run_script_cb (this, &vpn::script_if_init), true)) |
406 | !run_script (cb, true)) |
309 | { |
407 | { |
310 | slog (L_ERR, _("interface initialization command '%s' failed, exiting."), |
408 | slog (L_ERR, _("interface initialization command '%s' failed."), |
311 | tap->if_up ()); |
409 | tap->if_up ()); |
312 | exit (EXIT_FAILURE); |
410 | return -1; |
313 | } |
|
|
314 | |
|
|
315 | if (!run_script (run_script_cb (this, &vpn::script_if_up), true)) |
|
|
316 | { |
411 | } |
|
|
412 | |
|
|
413 | cb.set<vpn, &vpn::script_if_up> (this); |
|
|
414 | if (!run_script (cb, true)) |
|
|
415 | { |
317 | slog (L_ERR, _("if-up command execution failed, exiting.")); |
416 | slog (L_ERR, _("if-up command execution failed.")); |
318 | exit (EXIT_FAILURE); |
417 | return -1; |
319 | } |
418 | } |
320 | |
419 | |
321 | tap_ev_watcher.start (tap->fd, EVENT_READ); |
420 | tap_ev_watcher.start (tap->fd, EV_READ); |
322 | |
421 | |
323 | return 0; |
422 | return 0; |
|
|
423 | } |
|
|
424 | |
|
|
425 | bool |
|
|
426 | vpn::drop_privileges () |
|
|
427 | { |
|
|
428 | if (::conf.change_root) |
|
|
429 | { |
|
|
430 | if (!strcmp (::conf.change_root, "/")) |
|
|
431 | { |
|
|
432 | char dir [L_tmpnam]; |
|
|
433 | if (!tmpnam (dir)) |
|
|
434 | { |
|
|
435 | slog (L_CRIT, _("unable to create anonymous root path.")); |
|
|
436 | return false; |
|
|
437 | } |
|
|
438 | |
|
|
439 | if (mkdir (dir, 0700)) |
|
|
440 | { |
|
|
441 | slog (L_CRIT, _("unable to create anonymous root directory.")); |
|
|
442 | return false; |
|
|
443 | } |
|
|
444 | |
|
|
445 | if (chdir (dir)) |
|
|
446 | { |
|
|
447 | slog (L_CRIT, _("unable to change to anonymous root directory.")); |
|
|
448 | return false; |
|
|
449 | } |
|
|
450 | |
|
|
451 | if (rmdir (dir)) |
|
|
452 | slog (L_ERR, _("unable to remove anonymous root directory, continuing.")); |
|
|
453 | } |
|
|
454 | else |
|
|
455 | { |
|
|
456 | if (chdir (::conf.change_root)) |
|
|
457 | { |
|
|
458 | slog (L_CRIT, _("%s: unable to change to specified root directory."), ::conf.change_root); |
|
|
459 | return false; |
|
|
460 | } |
|
|
461 | } |
|
|
462 | |
|
|
463 | if (chroot (".")) |
|
|
464 | { |
|
|
465 | slog (L_CRIT, _("unable to set new root directory.")); |
|
|
466 | return false; |
|
|
467 | } |
|
|
468 | |
|
|
469 | if (chdir ("/")) |
|
|
470 | { |
|
|
471 | slog (L_CRIT, _("unable to set cwd to new root directory.")); |
|
|
472 | return false; |
|
|
473 | } |
|
|
474 | } |
|
|
475 | |
|
|
476 | if (::conf.change_gid) |
|
|
477 | if (setgid (::conf.change_gid)) |
|
|
478 | { |
|
|
479 | slog (L_CRIT, _("unable to change group id to %d."), ::conf.change_gid); |
|
|
480 | return false; |
|
|
481 | } |
|
|
482 | |
|
|
483 | if (::conf.change_uid) |
|
|
484 | if (setuid (::conf.change_uid)) |
|
|
485 | { |
|
|
486 | slog (L_CRIT, _("unable to change user id to %d."), ::conf.change_uid); |
|
|
487 | return false; |
|
|
488 | } |
|
|
489 | |
|
|
490 | return true; |
324 | } |
491 | } |
325 | |
492 | |
326 | bool |
493 | bool |
327 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
494 | vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
328 | { |
495 | { |
329 | #if defined(SOL_IP) && defined(IP_TOS) |
496 | set_tos (ipv4_fd, ipv4_tos, tos); |
330 | setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
331 | #endif |
|
|
332 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
497 | xsendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
333 | |
498 | |
334 | return true; |
499 | return true; |
335 | } |
500 | } |
336 | |
501 | |
337 | static u16 |
502 | static u16 |
… | |
… | |
359 | |
524 | |
360 | #if ENABLE_ICMP |
525 | #if ENABLE_ICMP |
361 | bool |
526 | bool |
362 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
527 | vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
363 | { |
528 | { |
364 | #if defined(SOL_IP) && defined(IP_TOS) |
|
|
365 | setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
366 | #endif |
|
|
367 | |
|
|
368 | pkt->unshift_hdr (4); |
529 | pkt->unshift_hdr (4); |
369 | |
530 | |
370 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
531 | icmp_header *hdr = (icmp_header *)&((*pkt)[0]); |
371 | hdr->type = ::conf.icmp_type; |
532 | hdr->type = ::conf.icmp_type; |
372 | hdr->code = 255; |
533 | hdr->code = 255; |
373 | hdr->checksum = 0; |
534 | hdr->checksum = 0; |
374 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
535 | hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
375 | |
536 | |
|
|
537 | set_tos (icmpv4_fd, icmpv4_tos, tos); |
376 | sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
538 | xsendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
377 | |
539 | |
378 | return true; |
540 | return true; |
379 | } |
541 | } |
380 | #endif |
542 | #endif |
381 | |
543 | |
382 | bool |
544 | bool |
383 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
545 | vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
384 | { |
546 | { |
385 | #if defined(SOL_IP) && defined(IP_TOS) |
547 | set_tos (udpv4_fd, udpv4_tos, tos); |
386 | setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
|
|
387 | #endif |
|
|
388 | sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
548 | xsendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
389 | |
549 | |
390 | return true; |
550 | return true; |
391 | } |
551 | } |
392 | |
552 | |
393 | void |
553 | void |
… | |
… | |
403 | { |
563 | { |
404 | // broadcast, this is ugly, but due to the security policy |
564 | // broadcast, this is ugly, but due to the security policy |
405 | // we have to connect to all hosts... |
565 | // we have to connect to all hosts... |
406 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
566 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
407 | if ((*c)->conf != THISNODE) |
567 | if ((*c)->conf != THISNODE) |
408 | (*c)->inject_data_packet (pkt, true); |
568 | (*c)->inject_data_packet (pkt); |
409 | } |
569 | } |
410 | } |
570 | } |
411 | |
571 | |
412 | void |
572 | void |
413 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
573 | vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
414 | { |
574 | { |
415 | unsigned int src = pkt->src (); |
575 | unsigned int src = pkt->src (); |
416 | unsigned int dst = pkt->dst (); |
576 | unsigned int dst = pkt->dst (); |
417 | |
577 | |
418 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"), |
578 | slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d."), |
419 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
579 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
420 | |
580 | |
421 | if (src == 0 || src > conns.size () |
581 | if (src == 0 || src > conns.size () |
422 | || dst > conns.size () |
582 | || dst > conns.size () |
423 | || pkt->typ () >= vpn_packet::PT_MAX) |
583 | || pkt->typ () >= vpn_packet::PT_MAX) |
424 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
584 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
425 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
|
|
426 | else if (dst > conns.size ()) |
|
|
427 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
|
|
428 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
585 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
429 | else |
586 | else |
430 | { |
587 | { |
431 | connection *c = conns[src - 1]; |
588 | connection *c = conns[src - 1]; |
432 | |
589 | |
433 | if (dst == 0) |
590 | if (dst == 0) |
434 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"), |
591 | slog (L_WARN, _("%s(%s): received broadcast (protocol violation)."), |
435 | c->conf->nodename, (const char *)rsi); |
592 | c->conf->nodename, (const char *)rsi); |
436 | else if (dst != THISNODE->id) |
593 | else if (dst != THISNODE->id) |
437 | { |
594 | { |
438 | if (THISNODE->routerprio) |
595 | if (THISNODE->routerprio) |
439 | // the tos setting gets lost here. who cares. |
596 | // the tos setting gets lost here. who cares. |
440 | conns[dst - 1]->inject_vpn_packet (pkt); |
597 | conns[dst - 1]->inject_vpn_packet (pkt); |
441 | else |
598 | else |
442 | slog (L_WARN, |
599 | slog (L_WARN, |
443 | _("%s(%s): forwarding request (=> %s), but we are no router"), |
600 | _("%s(%s): request to forward packet to %s, but we are no router (config mismatch?)."), |
444 | c->conf->nodename, (const char *)rsi, |
601 | c->conf->nodename, (const char *)rsi, |
445 | conns[dst - 1]->conf->nodename); |
602 | conns[dst - 1]->conf->nodename); |
446 | } |
603 | } |
447 | else |
604 | else |
448 | c->recv_vpn_packet (pkt, rsi); |
605 | c->recv_vpn_packet (pkt, rsi); |
… | |
… | |
453 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
610 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
454 | { |
611 | { |
455 | switch (si.prot) |
612 | switch (si.prot) |
456 | { |
613 | { |
457 | case PROT_IPv4: |
614 | case PROT_IPv4: |
458 | return send_ipv4_packet (pkt, si, tos); |
615 | return send_ipv4_packet (pkt, si, tos); |
|
|
616 | |
459 | case PROT_UDPv4: |
617 | case PROT_UDPv4: |
460 | return send_udpv4_packet (pkt, si, tos); |
618 | return send_udpv4_packet (pkt, si, tos); |
|
|
619 | |
461 | #if ENABLE_TCP |
620 | #if ENABLE_TCP |
462 | case PROT_TCPv4: |
621 | case PROT_TCPv4: |
463 | return send_tcpv4_packet (pkt, si, tos); |
622 | return send_tcpv4_packet (pkt, si, tos); |
464 | #endif |
623 | #endif |
465 | #if ENABLE_ICMP |
624 | #if ENABLE_ICMP |
466 | case PROT_ICMPv4: |
625 | case PROT_ICMPv4: |
467 | return send_icmpv4_packet (pkt, si, tos); |
626 | return send_icmpv4_packet (pkt, si, tos); |
468 | #endif |
627 | #endif |
469 | #if ENABLE_DNS |
628 | #if ENABLE_DNS |
470 | case PROT_DNSv4: |
629 | case PROT_DNSv4: |
471 | return send_dnsv4_packet (pkt, si, tos); |
630 | return send_dnsv4_packet (pkt, si, tos); |
472 | #endif |
631 | #endif |
473 | |
|
|
474 | default: |
632 | default: |
475 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
633 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
476 | } |
634 | } |
477 | |
635 | |
478 | return false; |
636 | return false; |
479 | } |
637 | } |
480 | |
638 | |
481 | void |
639 | inline void |
482 | vpn::ipv4_ev (io_watcher &w, short revents) |
640 | vpn::ipv4_ev (ev::io &w, int revents) |
483 | { |
641 | { |
484 | if (revents & EVENT_READ) |
642 | if (revents & EV_READ) |
485 | { |
643 | { |
486 | vpn_packet *pkt = new vpn_packet; |
644 | vpn_packet *pkt = new vpn_packet; |
487 | struct sockaddr_in sa; |
645 | struct sockaddr_in sa; |
488 | socklen_t sa_len = sizeof (sa); |
646 | socklen_t sa_len = sizeof (sa); |
489 | int len; |
647 | int len; |
… | |
… | |
495 | if (len > 0) |
653 | if (len > 0) |
496 | { |
654 | { |
497 | pkt->len = len; |
655 | pkt->len = len; |
498 | |
656 | |
499 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
657 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
500 | pkt->skip_hdr (IP_OVERHEAD); |
658 | pkt->skip_hdr (pkt->ipv4_hdr_len ()); |
501 | |
659 | |
502 | recv_vpn_packet (pkt, si); |
660 | recv_vpn_packet (pkt, si); |
503 | } |
661 | } |
504 | else |
662 | else |
505 | { |
663 | { |
506 | // probably ECONNRESET or somesuch |
664 | // probably ECONNRESET or somesuch |
507 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
665 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
508 | } |
666 | } |
509 | |
667 | |
510 | delete pkt; |
668 | delete pkt; |
511 | } |
669 | } |
512 | else |
670 | else |
513 | { |
671 | { |
514 | slog (L_ERR, |
672 | slog (L_ERR, |
515 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
673 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
516 | revents); |
674 | revents); |
517 | exit (EXIT_FAILURE); |
675 | exit (EXIT_FAILURE); |
518 | } |
676 | } |
519 | } |
677 | } |
520 | |
678 | |
521 | #if ENABLE_ICMP |
679 | #if ENABLE_ICMP |
522 | void |
680 | inline void |
523 | vpn::icmpv4_ev (io_watcher &w, short revents) |
681 | vpn::icmpv4_ev (ev::io &w, int revents) |
524 | { |
682 | { |
525 | if (revents & EVENT_READ) |
683 | if (revents & EV_READ) |
526 | { |
684 | { |
527 | vpn_packet *pkt = new vpn_packet; |
685 | vpn_packet *pkt = new vpn_packet; |
528 | struct sockaddr_in sa; |
686 | struct sockaddr_in sa; |
529 | socklen_t sa_len = sizeof (sa); |
687 | socklen_t sa_len = sizeof (sa); |
530 | int len; |
688 | int len; |
… | |
… | |
542 | if (hdr->type == ::conf.icmp_type |
700 | if (hdr->type == ::conf.icmp_type |
543 | && hdr->code == 255) |
701 | && hdr->code == 255) |
544 | { |
702 | { |
545 | // raw sockets deliver the ipv4, but don't expect it on sends |
703 | // raw sockets deliver the ipv4, but don't expect it on sends |
546 | // this is slow, but... |
704 | // this is slow, but... |
547 | pkt->skip_hdr (ICMP_OVERHEAD); |
705 | pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD)); |
548 | |
706 | |
549 | recv_vpn_packet (pkt, si); |
707 | recv_vpn_packet (pkt, si); |
550 | } |
708 | } |
551 | } |
709 | } |
552 | else |
710 | else |
553 | { |
711 | { |
554 | // probably ECONNRESET or somesuch |
712 | // probably ECONNRESET or somesuch |
555 | slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
713 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
556 | } |
714 | } |
557 | |
715 | |
558 | delete pkt; |
716 | delete pkt; |
559 | } |
717 | } |
560 | else |
718 | else |
561 | { |
719 | { |
562 | slog (L_ERR, |
720 | slog (L_ERR, |
563 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
721 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
564 | revents); |
722 | revents); |
565 | exit (EXIT_FAILURE); |
723 | exit (EXIT_FAILURE); |
566 | } |
724 | } |
567 | } |
725 | } |
568 | #endif |
726 | #endif |
569 | |
727 | |
570 | void |
728 | inline void |
571 | vpn::udpv4_ev (io_watcher &w, short revents) |
729 | vpn::udpv4_ev (ev::io &w, int revents) |
572 | { |
730 | { |
573 | if (revents & EVENT_READ) |
731 | if (revents & EV_READ) |
574 | { |
732 | { |
575 | vpn_packet *pkt = new vpn_packet; |
733 | vpn_packet *pkt = new vpn_packet; |
576 | struct sockaddr_in sa; |
734 | struct sockaddr_in sa; |
577 | socklen_t sa_len = sizeof (sa); |
735 | socklen_t sa_len = sizeof (sa); |
578 | int len; |
736 | int len; |
… | |
… | |
588 | recv_vpn_packet (pkt, si); |
746 | recv_vpn_packet (pkt, si); |
589 | } |
747 | } |
590 | else |
748 | else |
591 | { |
749 | { |
592 | // probably ECONNRESET or somesuch |
750 | // probably ECONNRESET or somesuch |
593 | slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
751 | slog (L_DEBUG, _("%s: fd %d, %s."), (const char *)si, w.fd, strerror (errno)); |
594 | } |
752 | } |
595 | |
753 | |
596 | delete pkt; |
754 | delete pkt; |
597 | } |
755 | } |
598 | else |
756 | else |
599 | { |
757 | { |
600 | slog (L_ERR, |
758 | slog (L_ERR, |
601 | _("FATAL: unknown revents %08x in socket, terminating\n"), |
759 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
602 | revents); |
760 | revents); |
603 | exit (EXIT_FAILURE); |
761 | exit (EXIT_FAILURE); |
604 | } |
762 | } |
605 | } |
763 | } |
606 | |
764 | |
607 | void |
765 | inline void |
608 | vpn::tap_ev (io_watcher &w, short revents) |
766 | vpn::tap_ev (ev::io &w, int revents) |
609 | { |
767 | { |
610 | if (revents & EVENT_READ) |
768 | if (revents & EV_READ) |
611 | { |
769 | { |
612 | /* process data */ |
770 | /* process data */ |
613 | tap_packet *pkt; |
771 | tap_packet *pkt; |
614 | |
772 | |
615 | pkt = tap->recv (); |
773 | pkt = tap->recv (); |
… | |
… | |
644 | } |
802 | } |
645 | else |
803 | else |
646 | abort (); |
804 | abort (); |
647 | } |
805 | } |
648 | |
806 | |
649 | void |
807 | inline void |
650 | vpn::event_cb (time_watcher &w) |
808 | vpn::event_cb (ev::timer &w, int) |
651 | { |
809 | { |
652 | if (events) |
810 | if (events) |
653 | { |
811 | { |
654 | if (events & EVENT_SHUTDOWN) |
812 | if (events & EVENT_SHUTDOWN) |
655 | { |
813 | { |
656 | slog (L_INFO, _("preparing shutdown...")); |
814 | slog (L_INFO, _("preparing shutdown...")); |
657 | |
815 | |
658 | shutdown_all (); |
816 | shutdown_all (); |
659 | remove_pid (conf.pidfilename); |
817 | remove_pid (conf.pidfilename); |
660 | slog (L_INFO, _("terminating")); |
818 | slog (L_INFO, _("exiting.")); |
661 | exit (EXIT_SUCCESS); |
819 | exit (EXIT_SUCCESS); |
662 | } |
820 | } |
663 | |
821 | |
664 | if (events & EVENT_RECONNECT) |
822 | if (events & EVENT_RECONNECT) |
665 | { |
823 | { |
666 | slog (L_INFO, _("forced reconnect")); |
824 | slog (L_INFO, _("forced reconnect.")); |
667 | |
825 | |
668 | reconnect_all (); |
826 | reconnect_all (); |
669 | } |
827 | } |
670 | |
828 | |
671 | events = 0; |
829 | events = 0; |
… | |
… | |
687 | |
845 | |
688 | conns.clear (); |
846 | conns.clear (); |
689 | |
847 | |
690 | connection_init (); |
848 | connection_init (); |
691 | |
849 | |
692 | for (configuration::node_vector::iterator i = conf.nodes.begin (); |
850 | for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i) |
693 | i != conf.nodes.end (); ++i) |
851 | conns.push_back (new connection (this, *i)); |
694 | { |
852 | |
695 | connection *conn = new connection (this, *i); |
853 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
696 | conns.push_back (conn); |
|
|
697 | conn->establish_connection (); |
854 | (*c)->establish_connection (); |
698 | } |
|
|
699 | } |
855 | } |
700 | |
856 | |
701 | connection *vpn::find_router () |
857 | bool |
|
|
858 | vpn::can_direct (conf_node *src, conf_node *dst) const |
702 | { |
859 | { |
703 | u32 prio = 1; |
860 | return src != dst |
|
|
861 | && src->may_direct (dst) |
|
|
862 | && dst->may_direct (src) |
|
|
863 | && (((src->protocols & dst->protocols) && src->connectmode == conf_node::C_ALWAYS) |
|
|
864 | || (src->protocols & dst->connectable_protocols ())); |
|
|
865 | } |
|
|
866 | |
|
|
867 | // only works for indirect and routed connections: find a router |
|
|
868 | // from THISNODE to dst |
|
|
869 | connection * |
|
|
870 | vpn::find_router_for (const connection *dst) |
|
|
871 | { |
704 | connection *router = 0; |
872 | connection *router = 0; |
705 | |
873 | |
|
|
874 | // first try to find a router with a direct connection, route there |
|
|
875 | // regardless of any other considerations. |
|
|
876 | { |
|
|
877 | u32 prio = 1; |
|
|
878 | |
|
|
879 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
880 | { |
|
|
881 | connection *c = *i; |
|
|
882 | |
|
|
883 | if (c->conf->routerprio > prio |
|
|
884 | && c->conf != THISNODE |
|
|
885 | && can_direct (c->conf, dst->conf) |
|
|
886 | && c->ictx && c->octx) |
|
|
887 | { |
|
|
888 | prio = c->conf->routerprio; |
|
|
889 | router = c; |
|
|
890 | } |
|
|
891 | } |
|
|
892 | } |
|
|
893 | |
|
|
894 | if (router) |
|
|
895 | return router; |
|
|
896 | |
|
|
897 | // second try find the router with the highest priority, higher than ours |
|
|
898 | { |
|
|
899 | u32 prio = THISNODE->routerprio ? THISNODE->routerprio : 1; |
|
|
900 | |
|
|
901 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
|
|
902 | { |
|
|
903 | connection *c = *i; |
|
|
904 | |
|
|
905 | if (c->conf->routerprio > prio |
|
|
906 | && c != dst |
|
|
907 | && c->conf != THISNODE |
|
|
908 | && c->ictx && c->octx) |
|
|
909 | { |
|
|
910 | prio = c->conf->routerprio; |
|
|
911 | router = c; |
|
|
912 | } |
|
|
913 | } |
|
|
914 | } |
|
|
915 | |
|
|
916 | return router; |
|
|
917 | } |
|
|
918 | |
|
|
919 | void |
|
|
920 | vpn::connection_established (connection *c) |
|
|
921 | { |
706 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
922 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
707 | { |
923 | { |
708 | connection *c = *i; |
924 | connection *o = *i; |
709 | |
925 | |
710 | if (c->conf->routerprio > prio |
926 | if (o->si.valid () |
711 | && c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use |
927 | && c->si != o->si |
712 | && c->ictx && c->octx |
928 | && c == find_router_for (o) |
713 | && c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode |
929 | && !can_direct (THISNODE, o->conf)) |
714 | { |
|
|
715 | prio = c->conf->routerprio; |
|
|
716 | router = c; |
|
|
717 | } |
930 | { |
|
|
931 | slog (L_DEBUG, _("%s: can now route packets via %s, re-keying connection."), |
|
|
932 | o->conf->nodename, c->conf->nodename); |
|
|
933 | o->rekey (); |
|
|
934 | } |
718 | } |
935 | } |
719 | |
|
|
720 | return router; |
|
|
721 | } |
936 | } |
722 | |
937 | |
|
|
938 | void |
723 | void vpn::send_connect_request (int id) |
939 | vpn::send_connect_request (connection *c) |
724 | { |
940 | { |
725 | connection *c = find_router (); |
941 | connection *r = find_router_for (c); |
726 | |
942 | |
727 | if (c) |
943 | if (r) |
|
|
944 | { |
|
|
945 | slog (L_TRACE, _("%s: no address known, sending mediated connection request via %s."), |
|
|
946 | c->conf->nodename, r->conf->nodename); |
728 | c->send_connect_request (id); |
947 | r->send_connect_request (c->conf->id); |
|
|
948 | } |
729 | else |
949 | else |
730 | // no router found, aggressively connect to all routers |
950 | slog (L_DEBUG, _("%s: no way to connect and no router found: unable to connect at this time."), |
731 | for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
951 | c->conf->nodename); |
732 | if ((*i)->conf->routerprio && (*i)->conf != THISNODE) |
|
|
733 | (*i)->establish_connection (); |
|
|
734 | } |
952 | } |
735 | |
953 | |
736 | void |
954 | void |
737 | connection::dump_status () |
955 | connection::dump_status () |
738 | { |
956 | { |
739 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
957 | slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
740 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
958 | slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
741 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
959 | connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
742 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
960 | slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
743 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
961 | (long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
744 | slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"), |
|
|
745 | (long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at)); |
|
|
746 | } |
962 | } |
747 | |
963 | |
748 | void |
964 | void |
749 | vpn::dump_status () |
965 | vpn::dump_status () |
750 | { |
966 | { |
751 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW); |
967 | slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)ev_now ()); |
752 | |
968 | |
753 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
969 | for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
754 | (*c)->dump_status (); |
970 | (*c)->dump_status (); |
755 | |
971 | |
756 | slog (L_NOTICE, _("END status dump")); |
972 | slog (L_NOTICE, _("END status dump")); |
757 | } |
973 | } |
758 | |
974 | |
759 | vpn::vpn (void) |
975 | vpn::vpn (void) |
|
|
976 | { |
760 | : event (this, &vpn::event_cb) |
977 | event .set<vpn, &vpn::event_cb > (this); |
761 | , udpv4_ev_watcher (this, &vpn::udpv4_ev) |
978 | udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
762 | , ipv4_ev_watcher (this, &vpn::ipv4_ev) |
979 | ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
763 | #if ENABLE_TCP |
980 | #if ENABLE_TCP |
764 | , tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
981 | tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
765 | #endif |
982 | #endif |
766 | #if ENABLE_ICMP |
983 | #if ENABLE_ICMP |
767 | , icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
984 | icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |
768 | #endif |
985 | #endif |
769 | #if ENABLE_DNS |
986 | #if ENABLE_DNS |
770 | , dnsv4_ev_watcher (this, &vpn::dnsv4_ev) |
987 | dnsv4_ev_watcher .set<vpn, &vpn::dnsv4_ev > (this); |
771 | #endif |
988 | #endif |
772 | , tap_ev_watcher (this, &vpn::tap_ev) |
989 | tap_ev_watcher .set<vpn, &vpn::tap_ev > (this); |
773 | { |
|
|
774 | } |
990 | } |
775 | |
991 | |
776 | vpn::~vpn () |
992 | vpn::~vpn () |
777 | { |
993 | { |
778 | } |
994 | } |