1 | /* |
1 | /* |
2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2003-2008 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. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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> |
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35 | #include <queue> |
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36 | #include <utility> |
25 | |
37 | |
26 | #include <openssl/rand.h> |
38 | #include <openssl/rand.h> |
27 | #include <openssl/evp.h> |
39 | #include <openssl/evp.h> |
28 | #include <openssl/rsa.h> |
40 | #include <openssl/rsa.h> |
29 | #include <openssl/err.h> |
41 | #include <openssl/err.h> |
… | |
… | |
45 | #define ULTRA_FAST 1 |
57 | #define ULTRA_FAST 1 |
46 | #define HLOG 15 |
58 | #define HLOG 15 |
47 | #include "lzf/lzf.h" |
59 | #include "lzf/lzf.h" |
48 | #include "lzf/lzf_c.c" |
60 | #include "lzf/lzf_c.c" |
49 | #include "lzf/lzf_d.c" |
61 | #include "lzf/lzf_d.c" |
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62 | |
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63 | ////////////////////////////////////////////////////////////////////////////// |
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64 | |
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65 | static std::queue< std::pair<run_script_cb *, const char *> > rs_queue; |
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66 | static ev::child rs_child_ev; |
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67 | |
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68 | void // c++ requires external linkage here, apparently :( |
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69 | rs_child_cb (ev::child &w, int revents) |
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70 | { |
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71 | w.stop (); |
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72 | |
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73 | if (rs_queue.empty ()) |
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74 | return; |
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75 | |
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76 | pid_t pid = run_script (*rs_queue.front ().first, false); |
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77 | if (pid) |
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78 | { |
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79 | w.set (pid); |
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80 | w.start (); |
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81 | } |
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82 | else |
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83 | slog (L_WARN, rs_queue.front ().second); |
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84 | |
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85 | delete rs_queue.front ().first; |
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86 | rs_queue.pop (); |
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87 | } |
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88 | |
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89 | // despite the fancy name, this is quite a hack |
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90 | static void |
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91 | run_script_queued (run_script_cb *cb, const char *warnmsg) |
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92 | { |
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93 | rs_queue.push (std::make_pair (cb, warnmsg)); |
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94 | |
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95 | if (!rs_child_ev.is_active ()) |
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96 | { |
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97 | rs_child_ev.set<rs_child_cb> (); |
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98 | rs_child_ev (); |
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99 | } |
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100 | } |
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101 | |
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102 | ////////////////////////////////////////////////////////////////////////////// |
50 | |
103 | |
51 | struct crypto_ctx |
104 | struct crypto_ctx |
52 | { |
105 | { |
53 | EVP_CIPHER_CTX cctx; |
106 | EVP_CIPHER_CTX cctx; |
54 | HMAC_CTX hctx; |
107 | HMAC_CTX hctx; |
… | |
… | |
82 | require (EVP_DigestUpdate(&ctx, &id, sizeof id)); |
135 | require (EVP_DigestUpdate(&ctx, &id, sizeof id)); |
83 | require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); |
136 | require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); |
84 | EVP_MD_CTX_cleanup (&ctx); |
137 | EVP_MD_CTX_cleanup (&ctx); |
85 | } |
138 | } |
86 | |
139 | |
87 | struct rsa_entry { |
140 | struct rsa_entry |
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141 | { |
88 | tstamp expire; |
142 | tstamp expire; |
89 | rsaid id; |
143 | rsaid id; |
90 | rsachallenge chg; |
144 | rsachallenge chg; |
91 | }; |
145 | }; |
92 | |
146 | |
93 | struct rsa_cache : list<rsa_entry> |
147 | struct rsa_cache : list<rsa_entry> |
94 | { |
148 | { |
95 | void cleaner_cb (time_watcher &w); time_watcher cleaner; |
149 | inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner; |
96 | |
150 | |
97 | bool find (const rsaid &id, rsachallenge &chg) |
151 | bool find (const rsaid &id, rsachallenge &chg) |
98 | { |
152 | { |
99 | for (iterator i = begin (); i != end (); ++i) |
153 | for (iterator i = begin (); i != end (); ++i) |
100 | { |
154 | { |
101 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW) |
155 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ()) |
102 | { |
156 | { |
103 | memcpy (&chg, &i->chg, sizeof chg); |
157 | memcpy (&chg, &i->chg, sizeof chg); |
104 | |
158 | |
105 | erase (i); |
159 | erase (i); |
106 | return true; |
160 | return true; |
107 | } |
161 | } |
108 | } |
162 | } |
109 | |
163 | |
110 | if (cleaner.at < NOW) |
164 | if (!cleaner.is_active ()) |
111 | cleaner.start (NOW + RSA_TTL); |
165 | cleaner.again (); |
112 | |
166 | |
113 | return false; |
167 | return false; |
114 | } |
168 | } |
115 | |
169 | |
116 | void gen (rsaid &id, rsachallenge &chg) |
170 | void gen (rsaid &id, rsachallenge &chg) |
… | |
… | |
118 | rsa_entry e; |
172 | rsa_entry e; |
119 | |
173 | |
120 | RAND_bytes ((unsigned char *)&id, sizeof id); |
174 | RAND_bytes ((unsigned char *)&id, sizeof id); |
121 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
175 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
122 | |
176 | |
123 | e.expire = NOW + RSA_TTL; |
177 | e.expire = ev_now () + RSA_TTL; |
124 | e.id = id; |
178 | e.id = id; |
125 | memcpy (&e.chg, &chg, sizeof chg); |
179 | memcpy (&e.chg, &chg, sizeof chg); |
126 | |
180 | |
127 | push_back (e); |
181 | push_back (e); |
128 | |
182 | |
129 | if (cleaner.at < NOW) |
183 | if (!cleaner.is_active ()) |
130 | cleaner.start (NOW + RSA_TTL); |
184 | cleaner.again (); |
131 | } |
185 | } |
132 | |
186 | |
133 | rsa_cache () |
187 | rsa_cache () |
134 | : cleaner (this, &rsa_cache::cleaner_cb) |
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135 | { } |
188 | { |
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189 | cleaner.set<rsa_cache, &rsa_cache::cleaner_cb> (this); |
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190 | cleaner.set (RSA_TTL, RSA_TTL); |
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191 | } |
136 | |
192 | |
137 | } rsa_cache; |
193 | } rsa_cache; |
138 | |
194 | |
139 | void rsa_cache::cleaner_cb (time_watcher &w) |
195 | void rsa_cache::cleaner_cb (ev::timer &w, int revents) |
140 | { |
196 | { |
141 | if (!empty ()) |
197 | if (empty ()) |
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198 | w.stop (); |
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199 | else |
142 | { |
200 | { |
143 | w.start (NOW + RSA_TTL); |
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144 | |
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145 | for (iterator i = begin (); i != end (); ) |
201 | for (iterator i = begin (); i != end (); ) |
146 | if (i->expire <= NOW) |
202 | if (i->expire <= ev_now ()) |
147 | i = erase (i); |
203 | i = erase (i); |
148 | else |
204 | else |
149 | ++i; |
205 | ++i; |
150 | } |
206 | } |
151 | } |
207 | } |
152 | |
208 | |
153 | ////////////////////////////////////////////////////////////////////////////// |
209 | ////////////////////////////////////////////////////////////////////////////// |
154 | |
210 | |
155 | void pkt_queue::put (net_packet *p) |
211 | pkt_queue::pkt_queue (double max_ttl, int max_queue) |
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212 | : max_ttl (max_ttl), max_queue (max_queue) |
156 | { |
213 | { |
157 | if (queue[i]) |
214 | queue = new pkt [max_queue]; |
158 | { |
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159 | delete queue[i]; |
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160 | j = (j + 1) % QUEUEDEPTH; |
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161 | } |
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162 | |
215 | |
163 | queue[i] = p; |
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164 | |
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165 | i = (i + 1) % QUEUEDEPTH; |
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166 | } |
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167 | |
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168 | net_packet *pkt_queue::get () |
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169 | { |
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170 | net_packet *p = queue[j]; |
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171 | |
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172 | if (p) |
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173 | { |
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174 | queue[j] = 0; |
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175 | j = (j + 1) % QUEUEDEPTH; |
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176 | } |
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177 | |
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178 | return p; |
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179 | } |
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180 | |
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181 | pkt_queue::pkt_queue () |
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182 | { |
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183 | memset (queue, 0, sizeof (queue)); |
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184 | i = 0; |
216 | i = 0; |
185 | j = 0; |
217 | j = 0; |
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218 | |
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219 | expire.set<pkt_queue, &pkt_queue::expire_cb> (this); |
186 | } |
220 | } |
187 | |
221 | |
188 | pkt_queue::~pkt_queue () |
222 | pkt_queue::~pkt_queue () |
189 | { |
223 | { |
190 | for (i = QUEUEDEPTH; --i > 0; ) |
224 | while (net_packet *p = get ()) |
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225 | delete p; |
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226 | |
191 | delete queue[i]; |
227 | delete [] queue; |
192 | } |
228 | } |
193 | |
229 | |
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230 | void pkt_queue::expire_cb (ev::timer &w, int revents) |
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231 | { |
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232 | ev_tstamp expire = ev_now () - max_ttl; |
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233 | |
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234 | for (;;) |
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235 | { |
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236 | if (empty ()) |
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237 | break; |
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238 | |
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239 | double diff = queue[j].tstamp - expire; |
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240 | |
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241 | if (diff >= 0.) |
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242 | { |
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243 | w.start (diff > 0.5 ? diff : 0.5); |
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244 | break; |
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245 | } |
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246 | |
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247 | delete get (); |
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248 | } |
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249 | } |
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250 | |
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251 | void pkt_queue::put (net_packet *p) |
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252 | { |
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253 | ev_tstamp now = ev_now (); |
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254 | |
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255 | // start expiry timer |
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256 | if (empty ()) |
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257 | expire.start (max_ttl); |
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258 | |
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259 | int ni = i + 1 == max_queue ? 0 : i + 1; |
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260 | |
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261 | if (ni == j) |
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262 | delete get (); |
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263 | |
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264 | queue[i].pkt = p; |
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265 | queue[i].tstamp = now; |
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266 | |
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267 | i = ni; |
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268 | } |
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269 | |
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270 | net_packet *pkt_queue::get () |
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271 | { |
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272 | if (empty ()) |
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273 | return 0; |
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274 | |
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275 | net_packet *p = queue[j].pkt; |
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276 | queue[j].pkt = 0; |
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277 | |
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278 | j = j + 1 == max_queue ? 0 : j + 1; |
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279 | |
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280 | return p; |
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281 | } |
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282 | |
194 | struct net_rateinfo { |
283 | struct net_rateinfo |
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284 | { |
195 | u32 host; |
285 | u32 host; |
196 | double pcnt, diff; |
286 | double pcnt, diff; |
197 | tstamp last; |
287 | tstamp last; |
198 | }; |
288 | }; |
199 | |
289 | |
… | |
… | |
218 | iterator i; |
308 | iterator i; |
219 | |
309 | |
220 | for (i = begin (); i != end (); ) |
310 | for (i = begin (); i != end (); ) |
221 | if (i->host == host) |
311 | if (i->host == host) |
222 | break; |
312 | break; |
223 | else if (i->last < NOW - NRL_EXPIRE) |
313 | else if (i->last < ev_now () - NRL_EXPIRE) |
224 | i = erase (i); |
314 | i = erase (i); |
225 | else |
315 | else |
226 | i++; |
316 | i++; |
227 | |
317 | |
228 | if (i == end ()) |
318 | if (i == end ()) |
… | |
… | |
230 | net_rateinfo ri; |
320 | net_rateinfo ri; |
231 | |
321 | |
232 | ri.host = host; |
322 | ri.host = host; |
233 | ri.pcnt = 1.; |
323 | ri.pcnt = 1.; |
234 | ri.diff = NRL_MAXDIF; |
324 | ri.diff = NRL_MAXDIF; |
235 | ri.last = NOW; |
325 | ri.last = ev_now (); |
236 | |
326 | |
237 | push_front (ri); |
327 | push_front (ri); |
238 | |
328 | |
239 | return true; |
329 | return true; |
240 | } |
330 | } |
… | |
… | |
242 | { |
332 | { |
243 | net_rateinfo ri (*i); |
333 | net_rateinfo ri (*i); |
244 | erase (i); |
334 | erase (i); |
245 | |
335 | |
246 | ri.pcnt = ri.pcnt * NRL_ALPHA; |
336 | ri.pcnt = ri.pcnt * NRL_ALPHA; |
247 | ri.diff = ri.diff * NRL_ALPHA + (NOW - ri.last); |
337 | ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last); |
248 | |
338 | |
249 | ri.last = NOW; |
339 | ri.last = ev_now (); |
250 | |
340 | |
251 | double dif = ri.diff / ri.pcnt; |
341 | double dif = ri.diff / ri.pcnt; |
252 | |
342 | |
253 | bool send = dif > NRL_CUTOFF; |
343 | bool send = dif > NRL_CUTOFF; |
254 | |
344 | |
… | |
… | |
463 | #if ENABLE_COMPRESSION |
553 | #if ENABLE_COMPRESSION |
464 | f |= FEATURE_COMPRESSION; |
554 | f |= FEATURE_COMPRESSION; |
465 | #endif |
555 | #endif |
466 | #if ENABLE_ROHC |
556 | #if ENABLE_ROHC |
467 | f |= FEATURE_ROHC; |
557 | f |= FEATURE_ROHC; |
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558 | #endif |
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559 | #if ENABLE_BRIDGING |
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560 | f |= FEATURE_BRIDGING; |
468 | #endif |
561 | #endif |
469 | return f; |
562 | return f; |
470 | } |
563 | } |
471 | }; |
564 | }; |
472 | |
565 | |
… | |
… | |
579 | ///////////////////////////////////////////////////////////////////////////// |
672 | ///////////////////////////////////////////////////////////////////////////// |
580 | |
673 | |
581 | void |
674 | void |
582 | connection::connection_established () |
675 | connection::connection_established () |
583 | { |
676 | { |
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677 | slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx); |
|
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678 | |
584 | if (ictx && octx) |
679 | if (ictx && octx) |
585 | { |
680 | { |
586 | connectmode = conf->connectmode; |
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587 | |
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588 | // make sure rekeying timeouts are slightly asymmetric |
681 | // make sure rekeying timeouts are slightly asymmetric |
589 | rekey.start (NOW + ::conf.rekey |
682 | ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0); |
590 | + (conf->id > THISNODE->id ? 10 : 0)); |
683 | rekey.start (rekey_interval, rekey_interval); |
591 | keepalive.start (NOW + ::conf.keepalive); |
684 | keepalive.start (::conf.keepalive); |
592 | |
685 | |
593 | // send queued packets |
686 | // send queued packets |
594 | if (ictx && octx) |
687 | if (ictx && octx) |
595 | { |
688 | { |
596 | while (tap_packet *p = (tap_packet *)data_queue.get ()) |
689 | while (tap_packet *p = (tap_packet *)data_queue.get ()) |
597 | { |
690 | { |
598 | send_data_packet (p); |
691 | if (p->len) send_data_packet (p); |
599 | delete p; |
692 | delete p; |
600 | } |
693 | } |
601 | |
694 | |
602 | while (vpn_packet *p = (vpn_packet *)vpn_queue.get ()) |
695 | while (vpn_packet *p = (vpn_packet *)vpn_queue.get ()) |
603 | { |
696 | { |
604 | send_vpn_packet (p, si, IPTOS_RELIABILITY); |
697 | if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY); |
605 | delete p; |
698 | delete p; |
606 | } |
699 | } |
607 | } |
700 | } |
608 | } |
701 | } |
609 | else |
702 | else |
610 | { |
703 | { |
611 | retry_cnt = 0; |
704 | retry_cnt = 0; |
612 | establish_connection.start (NOW + 5); |
705 | establish_connection.start (5); |
613 | keepalive.stop (); |
706 | keepalive.stop (); |
614 | rekey.stop (); |
707 | rekey.stop (); |
615 | } |
708 | } |
616 | } |
709 | } |
617 | |
710 | |
618 | void |
711 | void |
619 | connection::reset_si () |
712 | connection::reset_si () |
620 | { |
713 | { |
621 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
714 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
622 | |
715 | |
623 | // mask out protocols we cannot establish |
716 | // mask out endpoints we can't connect to |
624 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
717 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
625 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
718 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
626 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
719 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
|
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720 | |
|
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721 | if (protocol |
|
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722 | && (!conf->can_direct (THISNODE) |
|
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723 | || !THISNODE->can_direct (conf))) |
|
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724 | { |
|
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725 | slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename); |
|
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726 | protocol = 0; |
|
|
727 | } |
627 | |
728 | |
628 | si.set (conf, protocol); |
729 | si.set (conf, protocol); |
629 | } |
730 | } |
630 | |
731 | |
631 | // ensure sockinfo is valid, forward if necessary |
732 | // ensure sockinfo is valid, forward if necessary |
… | |
… | |
641 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"), |
742 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"), |
642 | conf->nodename, r->conf->nodename, (const char *)r->si); |
743 | conf->nodename, r->conf->nodename, (const char *)r->si); |
643 | return r->si; |
744 | return r->si; |
644 | } |
745 | } |
645 | else |
746 | else |
646 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
747 | slog (L_DEBUG, _("%s: node unreachable, no common protocol, no router"), |
647 | conf->nodename); |
748 | conf->nodename); |
648 | } |
749 | } |
649 | |
750 | |
650 | return si; |
751 | return si; |
651 | } |
752 | } |
… | |
… | |
717 | } |
818 | } |
718 | |
819 | |
719 | void |
820 | void |
720 | connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
821 | connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
721 | { |
822 | { |
722 | slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n", |
823 | slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)", |
723 | conf->id, rid, (const char *)rsi); |
824 | conf->id, rid, (const char *)rsi); |
724 | |
825 | |
725 | connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
826 | connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
726 | |
827 | |
727 | r->hmac_set (octx); |
828 | r->hmac_set (octx); |
728 | send_vpn_packet (r, si); |
829 | send_vpn_packet (r, si); |
729 | |
830 | |
730 | delete r; |
831 | delete r; |
731 | } |
832 | } |
732 | |
833 | |
733 | void |
834 | inline void |
734 | connection::establish_connection_cb (time_watcher &w) |
835 | connection::establish_connection_cb (ev::timer &w, int revents) |
735 | { |
836 | { |
736 | if (!ictx |
837 | if (!ictx |
737 | && conf != THISNODE |
838 | && conf != THISNODE |
738 | && connectmode != conf_node::C_NEVER |
839 | && connectmode != conf_node::C_NEVER |
739 | && connectmode != conf_node::C_DISABLED |
840 | && connectmode != conf_node::C_DISABLED |
740 | && NOW > w.at) |
841 | && !w.is_active ()) |
741 | { |
842 | { |
742 | w.at = TSTAMP_MAX; // first disable this watcher in case of recursion |
843 | // a bit hacky, if ondemand, and packets are no longer queued, then reset the connection |
|
|
844 | // and stop trying. should probably be handled by a per-connection expire handler. |
|
|
845 | if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ()) |
|
|
846 | { |
|
|
847 | reset_connection (); |
|
|
848 | return; |
|
|
849 | } |
743 | |
850 | |
744 | double retry_int = double (retry_cnt & 3 |
851 | last_establish_attempt = ev_now (); |
|
|
852 | |
|
|
853 | ev::tstamp retry_int = ev::tstamp (retry_cnt & 3 |
745 | ? (retry_cnt & 3) + 1 |
854 | ? (retry_cnt & 3) + 1 |
746 | : 1 << (retry_cnt >> 2)); |
855 | : 1 << (retry_cnt >> 2)); |
747 | |
856 | |
748 | reset_si (); |
857 | reset_si (); |
749 | |
858 | |
750 | bool slow = si.prot & PROT_SLOW; |
859 | bool slow = si.prot & PROT_SLOW; |
751 | |
860 | |
752 | if (si.prot && !si.host) |
861 | if (si.prot && !si.host) |
|
|
862 | { |
|
|
863 | slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename); |
|
|
864 | /*TODO*/ /* start the timer so we don't recurse endlessly */ |
|
|
865 | w.start (1); |
753 | vpn->send_connect_request (conf->id); |
866 | vpn->send_connect_request (conf->id); |
|
|
867 | } |
754 | else |
868 | else |
755 | { |
869 | { |
|
|
870 | slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx); |
|
|
871 | |
756 | const sockinfo &dsi = forward_si (si); |
872 | const sockinfo &dsi = forward_si (si); |
757 | |
873 | |
758 | slow = slow || (dsi.prot & PROT_SLOW); |
874 | slow = slow || (dsi.prot & PROT_SLOW); |
759 | |
875 | |
760 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
876 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
… | |
… | |
764 | else |
880 | else |
765 | send_ping (dsi, 0); |
881 | send_ping (dsi, 0); |
766 | } |
882 | } |
767 | } |
883 | } |
768 | |
884 | |
769 | retry_int *= slow ? 8. : 0.7; |
885 | retry_int *= slow ? 8. : 0.9; |
770 | |
886 | |
771 | if (retry_int < conf->max_retry) |
887 | if (retry_int < conf->max_retry) |
772 | retry_cnt++; |
888 | retry_cnt++; |
773 | else |
889 | else |
774 | retry_int = conf->max_retry; |
890 | retry_int = conf->max_retry; |
775 | |
891 | |
776 | w.start (NOW + retry_int); |
892 | w.start (retry_int); |
777 | } |
893 | } |
778 | } |
894 | } |
779 | |
895 | |
780 | void |
896 | void |
781 | connection::reset_connection () |
897 | connection::reset_connection () |
… | |
… | |
784 | { |
900 | { |
785 | slog (L_INFO, _("%s(%s): connection lost"), |
901 | slog (L_INFO, _("%s(%s): connection lost"), |
786 | conf->nodename, (const char *)si); |
902 | conf->nodename, (const char *)si); |
787 | |
903 | |
788 | if (::conf.script_node_down) |
904 | if (::conf.script_node_down) |
789 | if (!run_script (run_script_cb (this, &connection::script_node_down), false)) |
905 | { |
|
|
906 | run_script_cb *cb = new run_script_cb; |
|
|
907 | cb->set<connection, &connection::script_node_down> (this); |
790 | slog (L_WARN, _("node-down command execution failed, continuing.")); |
908 | run_script_queued (cb, _("node-down command execution failed, continuing.")); |
|
|
909 | } |
791 | } |
910 | } |
792 | |
911 | |
793 | delete ictx; ictx = 0; |
912 | delete ictx; ictx = 0; |
794 | delete octx; octx = 0; |
913 | delete octx; octx = 0; |
795 | #if ENABLE_DNS |
914 | #if ENABLE_DNS |
… | |
… | |
813 | send_reset (si); |
932 | send_reset (si); |
814 | |
933 | |
815 | reset_connection (); |
934 | reset_connection (); |
816 | } |
935 | } |
817 | |
936 | |
818 | void |
937 | inline void |
819 | connection::rekey_cb (time_watcher &w) |
938 | connection::rekey_cb (ev::timer &w, int revents) |
820 | { |
939 | { |
821 | reset_connection (); |
940 | reset_connection (); |
822 | establish_connection (); |
941 | establish_connection (); |
823 | } |
942 | } |
824 | |
943 | |
… | |
… | |
840 | if (oseqno > MAX_SEQNO) |
959 | if (oseqno > MAX_SEQNO) |
841 | rekey (); |
960 | rekey (); |
842 | } |
961 | } |
843 | |
962 | |
844 | void |
963 | void |
|
|
964 | connection::post_inject_queue () |
|
|
965 | { |
|
|
966 | // force a connection every now and when when packets are sent (max 1/s) |
|
|
967 | if (ev_now () - last_establish_attempt >= 0.95) // arbitrary |
|
|
968 | establish_connection.stop (); |
|
|
969 | |
|
|
970 | establish_connection (); |
|
|
971 | } |
|
|
972 | |
|
|
973 | void |
845 | connection::inject_data_packet (tap_packet *pkt, bool broadcast/*TODO DDD*/) |
974 | connection::inject_data_packet (tap_packet *pkt) |
846 | { |
975 | { |
847 | if (ictx && octx) |
976 | if (ictx && octx) |
848 | send_data_packet (pkt); |
977 | send_data_packet (pkt); |
849 | else |
978 | else |
850 | { |
979 | { |
851 | if (!broadcast) |
|
|
852 | data_queue.put (new tap_packet (*pkt)); |
980 | data_queue.put (new tap_packet (*pkt)); |
853 | |
981 | post_inject_queue (); |
854 | establish_connection (); |
|
|
855 | } |
982 | } |
856 | } |
983 | } |
857 | |
984 | |
858 | void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
985 | void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
859 | { |
986 | { |
860 | if (ictx && octx) |
987 | if (ictx && octx) |
861 | send_vpn_packet (pkt, si, tos); |
988 | send_vpn_packet (pkt, si, tos); |
862 | else |
989 | else |
863 | { |
990 | { |
864 | vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); |
991 | vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); |
865 | |
992 | post_inject_queue (); |
866 | establish_connection (); |
|
|
867 | } |
993 | } |
868 | } |
994 | } |
869 | |
995 | |
870 | void |
996 | void |
871 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
997 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
872 | { |
998 | { |
873 | last_activity = NOW; |
999 | last_activity = ev_now (); |
874 | |
1000 | |
875 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
1001 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
876 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
1002 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
|
|
1003 | |
|
|
1004 | if (connectmode == conf_node::C_DISABLED) |
|
|
1005 | return; |
877 | |
1006 | |
878 | switch (pkt->typ ()) |
1007 | switch (pkt->typ ()) |
879 | { |
1008 | { |
880 | case vpn_packet::PT_PING: |
1009 | case vpn_packet::PT_PING: |
881 | // we send pings instead of auth packets after some retries, |
1010 | // we send pings instead of auth packets after some retries, |
… | |
… | |
1016 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
1145 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
1017 | conf->nodename, (const char *)rsi, |
1146 | conf->nodename, (const char *)rsi, |
1018 | p->prot_major, p->prot_minor); |
1147 | p->prot_major, p->prot_minor); |
1019 | |
1148 | |
1020 | if (::conf.script_node_up) |
1149 | if (::conf.script_node_up) |
1021 | if (!run_script (run_script_cb (this, &connection::script_node_up), false)) |
1150 | { |
|
|
1151 | run_script_cb *cb = new run_script_cb; |
|
|
1152 | cb->set<connection, &connection::script_node_up> (this); |
1022 | slog (L_WARN, _("node-up command execution failed, continuing.")); |
1153 | run_script_queued (cb, _("node-up command execution failed, continuing.")); |
|
|
1154 | } |
1023 | |
1155 | |
1024 | break; |
1156 | break; |
1025 | } |
1157 | } |
1026 | else |
1158 | else |
1027 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
1159 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
… | |
… | |
1087 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1219 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1088 | { |
1220 | { |
1089 | connection *c = vpn->conns[p->id - 1]; |
1221 | connection *c = vpn->conns[p->id - 1]; |
1090 | conf->protocols = p->protocols; |
1222 | conf->protocols = p->protocols; |
1091 | |
1223 | |
1092 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n", |
1224 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]", |
1093 | conf->id, p->id, c->ictx && c->octx); |
1225 | conf->id, p->id, c->ictx && c->octx); |
1094 | |
1226 | |
1095 | if (c->ictx && c->octx) |
1227 | if (c->ictx && c->octx) |
1096 | { |
1228 | { |
1097 | // send connect_info packets to both sides, in case one is |
1229 | // send connect_info packets to both sides, in case one is |
… | |
… | |
1143 | send_reset (rsi); |
1275 | send_reset (rsi); |
1144 | break; |
1276 | break; |
1145 | } |
1277 | } |
1146 | } |
1278 | } |
1147 | |
1279 | |
1148 | void connection::keepalive_cb (time_watcher &w) |
1280 | inline void |
|
|
1281 | connection::keepalive_cb (ev::timer &w, int revents) |
1149 | { |
1282 | { |
1150 | if (NOW >= last_activity + ::conf.keepalive + 30) |
1283 | if (ev_now () >= last_activity + ::conf.keepalive + 30) |
1151 | { |
1284 | { |
1152 | reset_connection (); |
1285 | reset_connection (); |
1153 | establish_connection (); |
1286 | establish_connection (); |
1154 | } |
1287 | } |
1155 | else if (NOW < last_activity + ::conf.keepalive) |
1288 | else if (ev_now () < last_activity + ::conf.keepalive) |
1156 | w.start (last_activity + ::conf.keepalive); |
1289 | w.start (last_activity + ::conf.keepalive - ev::now ()); |
1157 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1290 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1158 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1291 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1159 | { |
1292 | { |
1160 | send_ping (si); |
1293 | send_ping (si); |
1161 | w.start (NOW + 5); |
1294 | w.start (5); |
1162 | } |
1295 | } |
1163 | else if (NOW < last_activity + ::conf.keepalive + 10) |
1296 | else if (ev_now () < last_activity + ::conf.keepalive + 10) |
1164 | // hold ondemand connections implicitly a few seconds longer |
1297 | // hold ondemand connections implicitly a few seconds longer |
1165 | // should delete octx, though, or something like that ;) |
1298 | // should delete octx, though, or something like that ;) |
1166 | w.start (last_activity + ::conf.keepalive + 10); |
1299 | w.start (last_activity + ::conf.keepalive + 10 - ev::now ()); |
1167 | else |
1300 | else |
1168 | reset_connection (); |
1301 | reset_connection (); |
1169 | } |
1302 | } |
1170 | |
1303 | |
1171 | void connection::send_connect_request (int id) |
1304 | void connection::send_connect_request (int id) |
… | |
… | |
1198 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1331 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1199 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1332 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1200 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1333 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1201 | } |
1334 | } |
1202 | |
1335 | |
|
|
1336 | inline const char * |
1203 | const char *connection::script_node_up () |
1337 | connection::script_node_up () |
1204 | { |
1338 | { |
1205 | script_init_connect_env (); |
1339 | script_init_connect_env (); |
1206 | |
1340 | |
1207 | putenv ("STATE=up"); |
1341 | putenv ((char *)"STATE=up"); |
1208 | |
1342 | |
1209 | char *filename; |
1343 | char *filename; |
1210 | asprintf (&filename, |
1344 | asprintf (&filename, |
1211 | "%s/%s", |
1345 | "%s/%s", |
1212 | confbase, |
1346 | confbase, |
1213 | ::conf.script_node_up ? ::conf.script_node_up : "node-up"); |
1347 | ::conf.script_node_up ? ::conf.script_node_up : "node-up"); |
1214 | |
1348 | |
1215 | return filename; |
1349 | return filename; |
1216 | } |
1350 | } |
1217 | |
1351 | |
|
|
1352 | inline const char * |
1218 | const char *connection::script_node_down () |
1353 | connection::script_node_down () |
1219 | { |
1354 | { |
1220 | script_init_connect_env (); |
1355 | script_init_connect_env (); |
1221 | |
1356 | |
1222 | putenv ("STATE=down"); |
1357 | putenv ((char *)"STATE=down"); |
1223 | |
1358 | |
1224 | char *filename; |
1359 | char *filename; |
1225 | asprintf (&filename, |
1360 | asprintf (&filename, |
1226 | "%s/%s", |
1361 | "%s/%s", |
1227 | confbase, |
1362 | confbase, |
… | |
… | |
1229 | |
1364 | |
1230 | return filename; |
1365 | return filename; |
1231 | } |
1366 | } |
1232 | |
1367 | |
1233 | connection::connection (struct vpn *vpn, conf_node *conf) |
1368 | connection::connection (struct vpn *vpn, conf_node *conf) |
1234 | : vpn(vpn), conf(conf) |
1369 | : vpn(vpn), conf(conf), |
1235 | , rekey (this, &connection::rekey_cb) |
|
|
1236 | , keepalive (this, &connection::keepalive_cb) |
|
|
1237 | , establish_connection (this, &connection::establish_connection_cb) |
|
|
1238 | #if ENABLE_DNS |
1370 | #if ENABLE_DNS |
1239 | , dns (0) |
1371 | dns (0), |
1240 | #endif |
1372 | #endif |
|
|
1373 | data_queue(conf->max_ttl, conf->max_queue), |
|
|
1374 | vpn_queue(conf->max_ttl, conf->max_queue) |
1241 | { |
1375 | { |
|
|
1376 | rekey .set<connection, &connection::rekey_cb > (this); |
|
|
1377 | keepalive .set<connection, &connection::keepalive_cb > (this); |
|
|
1378 | establish_connection.set<connection, &connection::establish_connection_cb> (this); |
|
|
1379 | |
|
|
1380 | last_establish_attempt = 0.; |
1242 | octx = ictx = 0; |
1381 | octx = ictx = 0; |
1243 | retry_cnt = 0; |
|
|
1244 | |
1382 | |
1245 | if (!conf->protocols) // make sure some protocol is enabled |
1383 | if (!conf->protocols) // make sure some protocol is enabled |
1246 | conf->protocols = PROT_UDPv4; |
1384 | conf->protocols = PROT_UDPv4; |
1247 | |
1385 | |
1248 | connectmode = conf_node::C_ALWAYS; // initial setting |
1386 | connectmode = conf->connectmode; |
|
|
1387 | |
|
|
1388 | // queue a dummy packet to force an initial connection attempt |
|
|
1389 | if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED) |
|
|
1390 | vpn_queue.put (new net_packet); |
|
|
1391 | |
1249 | reset_connection (); |
1392 | reset_connection (); |
1250 | } |
1393 | } |
1251 | |
1394 | |
1252 | connection::~connection () |
1395 | connection::~connection () |
1253 | { |
1396 | { |