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 | |
4 | |
|
|
5 | This file is part of GVPE. |
|
|
6 | |
4 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
5 | it under the terms of the GNU General Public License as published by |
8 | it under the terms of the GNU General Public License as published by |
6 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
10 | (at your option) any later version. |
8 | |
11 | |
9 | 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, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
13 | |
16 | |
14 | 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 |
15 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
16 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
17 | */ |
20 | */ |
18 | |
21 | |
19 | #include "config.h" |
22 | #include "config.h" |
20 | |
|
|
21 | extern "C" { |
|
|
22 | # include "lzf/lzf.h" |
|
|
23 | } |
|
|
24 | |
23 | |
25 | #include <list> |
24 | #include <list> |
26 | |
25 | |
27 | #include <openssl/rand.h> |
26 | #include <openssl/rand.h> |
28 | #include <openssl/evp.h> |
27 | #include <openssl/evp.h> |
29 | #include <openssl/rsa.h> |
28 | #include <openssl/rsa.h> |
30 | #include <openssl/err.h> |
29 | #include <openssl/err.h> |
31 | |
|
|
32 | #include "gettext.h" |
|
|
33 | |
30 | |
34 | #include "conf.h" |
31 | #include "conf.h" |
35 | #include "slog.h" |
32 | #include "slog.h" |
36 | #include "device.h" |
33 | #include "device.h" |
37 | #include "vpn.h" |
34 | #include "vpn.h" |
38 | #include "connection.h" |
35 | #include "connection.h" |
39 | |
36 | |
|
|
37 | #include "netcompat.h" |
|
|
38 | |
40 | #if !HAVE_RAND_PSEUDO_BYTES |
39 | #if !HAVE_RAND_PSEUDO_BYTES |
41 | # define RAND_pseudo_bytes RAND_bytes |
40 | # define RAND_pseudo_bytes RAND_bytes |
42 | #endif |
41 | #endif |
43 | |
42 | |
44 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
43 | #define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
45 | |
44 | |
|
|
45 | #define ULTRA_FAST 1 |
|
|
46 | #define HLOG 15 |
|
|
47 | #include "lzf/lzf.h" |
|
|
48 | #include "lzf/lzf_c.c" |
|
|
49 | #include "lzf/lzf_d.c" |
|
|
50 | |
46 | struct crypto_ctx |
51 | struct crypto_ctx |
47 | { |
52 | { |
48 | EVP_CIPHER_CTX cctx; |
53 | EVP_CIPHER_CTX cctx; |
49 | HMAC_CTX hctx; |
54 | HMAC_CTX hctx; |
50 | |
55 | |
… | |
… | |
53 | }; |
58 | }; |
54 | |
59 | |
55 | crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc) |
60 | crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc) |
56 | { |
61 | { |
57 | EVP_CIPHER_CTX_init (&cctx); |
62 | EVP_CIPHER_CTX_init (&cctx); |
58 | EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc); |
63 | require (EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc)); |
59 | HMAC_CTX_init (&hctx); |
64 | HMAC_CTX_init (&hctx); |
60 | HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0); |
65 | HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0); |
61 | } |
66 | } |
62 | |
67 | |
63 | crypto_ctx::~crypto_ctx () |
68 | crypto_ctx::~crypto_ctx () |
64 | { |
69 | { |
65 | EVP_CIPHER_CTX_cleanup (&cctx); |
70 | require (EVP_CIPHER_CTX_cleanup (&cctx)); |
66 | HMAC_CTX_cleanup (&hctx); |
71 | HMAC_CTX_cleanup (&hctx); |
67 | } |
72 | } |
68 | |
73 | |
69 | static void |
74 | static void |
70 | rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h) |
75 | rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h) |
71 | { |
76 | { |
72 | EVP_MD_CTX ctx; |
77 | EVP_MD_CTX ctx; |
73 | |
78 | |
74 | EVP_MD_CTX_init (&ctx); |
79 | EVP_MD_CTX_init (&ctx); |
75 | EVP_DigestInit (&ctx, RSA_HASH); |
80 | require (EVP_DigestInit (&ctx, RSA_HASH)); |
76 | EVP_DigestUpdate(&ctx, &chg, sizeof chg); |
81 | require (EVP_DigestUpdate(&ctx, &chg, sizeof chg)); |
77 | EVP_DigestUpdate(&ctx, &id, sizeof id); |
82 | require (EVP_DigestUpdate(&ctx, &id, sizeof id)); |
78 | EVP_DigestFinal (&ctx, (unsigned char *)&h, 0); |
83 | require (EVP_DigestFinal (&ctx, (unsigned char *)&h, 0)); |
79 | EVP_MD_CTX_cleanup (&ctx); |
84 | EVP_MD_CTX_cleanup (&ctx); |
80 | } |
85 | } |
81 | |
86 | |
82 | struct rsa_entry { |
87 | struct rsa_entry |
|
|
88 | { |
83 | tstamp expire; |
89 | tstamp expire; |
84 | rsaid id; |
90 | rsaid id; |
85 | rsachallenge chg; |
91 | rsachallenge chg; |
86 | }; |
92 | }; |
87 | |
93 | |
88 | struct rsa_cache : list<rsa_entry> |
94 | struct rsa_cache : list<rsa_entry> |
89 | { |
95 | { |
90 | void cleaner_cb (time_watcher &w); time_watcher cleaner; |
96 | inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner; |
91 | |
97 | |
92 | bool find (const rsaid &id, rsachallenge &chg) |
98 | bool find (const rsaid &id, rsachallenge &chg) |
93 | { |
99 | { |
94 | for (iterator i = begin (); i != end (); ++i) |
100 | for (iterator i = begin (); i != end (); ++i) |
95 | { |
101 | { |
96 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW) |
102 | if (!memcmp (&id, &i->id, sizeof id) && i->expire > ev_now ()) |
97 | { |
103 | { |
98 | memcpy (&chg, &i->chg, sizeof chg); |
104 | memcpy (&chg, &i->chg, sizeof chg); |
99 | |
105 | |
100 | erase (i); |
106 | erase (i); |
101 | return true; |
107 | return true; |
102 | } |
108 | } |
103 | } |
109 | } |
104 | |
110 | |
105 | if (cleaner.at < NOW) |
111 | if (!cleaner.is_active ()) |
106 | cleaner.start (NOW + RSA_TTL); |
112 | cleaner.again (); |
107 | |
113 | |
108 | return false; |
114 | return false; |
109 | } |
115 | } |
110 | |
116 | |
111 | void gen (rsaid &id, rsachallenge &chg) |
117 | void gen (rsaid &id, rsachallenge &chg) |
112 | { |
118 | { |
113 | rsa_entry e; |
119 | rsa_entry e; |
114 | |
120 | |
115 | RAND_bytes ((unsigned char *)&id, sizeof id); |
121 | RAND_bytes ((unsigned char *)&id, sizeof id); |
116 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
122 | RAND_bytes ((unsigned char *)&chg, sizeof chg); |
117 | |
123 | |
118 | e.expire = NOW + RSA_TTL; |
124 | e.expire = ev_now () + RSA_TTL; |
119 | e.id = id; |
125 | e.id = id; |
120 | memcpy (&e.chg, &chg, sizeof chg); |
126 | memcpy (&e.chg, &chg, sizeof chg); |
121 | |
127 | |
122 | push_back (e); |
128 | push_back (e); |
123 | |
129 | |
124 | if (cleaner.at < NOW) |
130 | if (!cleaner.is_active ()) |
125 | cleaner.start (NOW + RSA_TTL); |
131 | cleaner.again (); |
126 | } |
132 | } |
127 | |
133 | |
128 | rsa_cache () |
134 | rsa_cache () |
129 | : cleaner (this, &rsa_cache::cleaner_cb) |
135 | { |
130 | { } |
136 | cleaner.set<rsa_cache, &rsa_cache::cleaner_cb> (this); |
|
|
137 | cleaner.set (RSA_TTL, RSA_TTL); |
|
|
138 | } |
131 | |
139 | |
132 | } rsa_cache; |
140 | } rsa_cache; |
133 | |
141 | |
134 | void rsa_cache::cleaner_cb (time_watcher &w) |
142 | void rsa_cache::cleaner_cb (ev::timer &w, int revents) |
135 | { |
143 | { |
136 | if (empty ()) |
144 | if (empty ()) |
137 | w.at = TSTAMP_CANCEL; |
145 | w.stop (); |
138 | else |
146 | else |
139 | { |
147 | { |
140 | w.at = NOW + RSA_TTL; |
|
|
141 | |
|
|
142 | for (iterator i = begin (); i != end (); ) |
148 | for (iterator i = begin (); i != end (); ) |
143 | if (i->expire <= NOW) |
149 | if (i->expire <= ev_now ()) |
144 | i = erase (i); |
150 | i = erase (i); |
145 | else |
151 | else |
146 | ++i; |
152 | ++i; |
147 | } |
153 | } |
148 | } |
154 | } |
149 | |
155 | |
150 | ////////////////////////////////////////////////////////////////////////////// |
156 | ////////////////////////////////////////////////////////////////////////////// |
151 | |
157 | |
152 | void pkt_queue::put (tap_packet *p) |
158 | pkt_queue::pkt_queue (double max_ttl, int max_queue) |
|
|
159 | : max_ttl (max_ttl), max_queue (max_queue) |
153 | { |
160 | { |
154 | if (queue[i]) |
161 | queue = new pkt [max_queue]; |
155 | { |
|
|
156 | delete queue[i]; |
|
|
157 | j = (j + 1) % QUEUEDEPTH; |
|
|
158 | } |
|
|
159 | |
162 | |
160 | queue[i] = p; |
|
|
161 | |
|
|
162 | i = (i + 1) % QUEUEDEPTH; |
|
|
163 | } |
|
|
164 | |
|
|
165 | tap_packet *pkt_queue::get () |
|
|
166 | { |
|
|
167 | tap_packet *p = queue[j]; |
|
|
168 | |
|
|
169 | if (p) |
|
|
170 | { |
|
|
171 | queue[j] = 0; |
|
|
172 | j = (j + 1) % QUEUEDEPTH; |
|
|
173 | } |
|
|
174 | |
|
|
175 | return p; |
|
|
176 | } |
|
|
177 | |
|
|
178 | pkt_queue::pkt_queue () |
|
|
179 | { |
|
|
180 | memset (queue, 0, sizeof (queue)); |
|
|
181 | i = 0; |
163 | i = 0; |
182 | j = 0; |
164 | j = 0; |
|
|
165 | |
|
|
166 | expire.set<pkt_queue, &pkt_queue::expire_cb> (this); |
183 | } |
167 | } |
184 | |
168 | |
185 | pkt_queue::~pkt_queue () |
169 | pkt_queue::~pkt_queue () |
186 | { |
170 | { |
187 | for (i = QUEUEDEPTH; --i > 0; ) |
171 | while (net_packet *p = get ()) |
|
|
172 | delete p; |
|
|
173 | |
188 | delete queue[i]; |
174 | delete [] queue; |
189 | } |
175 | } |
190 | |
176 | |
|
|
177 | void pkt_queue::expire_cb (ev::timer &w, int revents) |
|
|
178 | { |
|
|
179 | ev_tstamp expire = ev_now () - max_ttl; |
|
|
180 | |
|
|
181 | for (;;) |
|
|
182 | { |
|
|
183 | if (empty ()) |
|
|
184 | break; |
|
|
185 | |
|
|
186 | double diff = queue[j].tstamp - expire; |
|
|
187 | |
|
|
188 | if (diff >= 0.) |
|
|
189 | { |
|
|
190 | w.start (diff > 0.5 ? diff : 0.5); |
|
|
191 | break; |
|
|
192 | } |
|
|
193 | |
|
|
194 | delete get (); |
|
|
195 | } |
|
|
196 | } |
|
|
197 | |
|
|
198 | void pkt_queue::put (net_packet *p) |
|
|
199 | { |
|
|
200 | ev_tstamp now = ev_now (); |
|
|
201 | |
|
|
202 | // start expiry timer |
|
|
203 | if (empty ()) |
|
|
204 | expire.start (max_ttl); |
|
|
205 | |
|
|
206 | int ni = i + 1 == max_queue ? 0 : i + 1; |
|
|
207 | |
|
|
208 | if (ni == j) |
|
|
209 | delete get (); |
|
|
210 | |
|
|
211 | queue[i].pkt = p; |
|
|
212 | queue[i].tstamp = now; |
|
|
213 | |
|
|
214 | i = ni; |
|
|
215 | } |
|
|
216 | |
|
|
217 | net_packet *pkt_queue::get () |
|
|
218 | { |
|
|
219 | if (empty ()) |
|
|
220 | return 0; |
|
|
221 | |
|
|
222 | net_packet *p = queue[j].pkt; |
|
|
223 | queue[j].pkt = 0; |
|
|
224 | |
|
|
225 | j = j + 1 == max_queue ? 0 : j + 1; |
|
|
226 | |
|
|
227 | return p; |
|
|
228 | } |
|
|
229 | |
191 | struct net_rateinfo { |
230 | struct net_rateinfo |
|
|
231 | { |
192 | u32 host; |
232 | u32 host; |
193 | double pcnt, diff; |
233 | double pcnt, diff; |
194 | tstamp last; |
234 | tstamp last; |
195 | }; |
235 | }; |
196 | |
236 | |
197 | // only do action once every x seconds per host whole allowing bursts. |
237 | // only do action once every x seconds per host whole allowing bursts. |
198 | // this implementation ("splay list" ;) is inefficient, |
238 | // this implementation ("splay list" ;) is inefficient, |
199 | // but low on resources. |
239 | // but low on resources. |
200 | struct net_rate_limiter : list<net_rateinfo> |
240 | struct net_rate_limiter : list<net_rateinfo> |
201 | { |
241 | { |
202 | static const double ALPHA = 1. - 1. / 90.; // allow bursts |
242 | # define NRL_ALPHA (1. - 1. / 600.) // allow bursts |
203 | static const double CUTOFF = 20.; // one event every CUTOFF seconds |
243 | # define NRL_CUTOFF 10. // one event every CUTOFF seconds |
204 | static const double EXPIRE = CUTOFF * 30.; // expire entries after this time |
244 | # define NRL_EXPIRE (NRL_CUTOFF * 30.) // expire entries after this time |
|
|
245 | # define NRL_MAXDIF (NRL_CUTOFF * (1. / (1. - NRL_ALPHA))) // maximum diff /count value |
205 | |
246 | |
206 | bool can (const sockinfo &si) { return can((u32)si.host); } |
247 | bool can (const sockinfo &si) { return can((u32)si.host); } |
207 | bool can (u32 host); |
248 | bool can (u32 host); |
208 | }; |
249 | }; |
209 | |
250 | |
210 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
251 | net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
211 | |
252 | |
… | |
… | |
214 | iterator i; |
255 | iterator i; |
215 | |
256 | |
216 | for (i = begin (); i != end (); ) |
257 | for (i = begin (); i != end (); ) |
217 | if (i->host == host) |
258 | if (i->host == host) |
218 | break; |
259 | break; |
219 | else if (i->last < NOW - EXPIRE) |
260 | else if (i->last < ev_now () - NRL_EXPIRE) |
220 | i = erase (i); |
261 | i = erase (i); |
221 | else |
262 | else |
222 | i++; |
263 | i++; |
223 | |
264 | |
224 | if (i == end ()) |
265 | if (i == end ()) |
225 | { |
266 | { |
226 | net_rateinfo ri; |
267 | net_rateinfo ri; |
227 | |
268 | |
228 | ri.host = host; |
269 | ri.host = host; |
229 | ri.pcnt = 1.; |
270 | ri.pcnt = 1.; |
230 | ri.diff = CUTOFF * (1. / (1. - ALPHA)); |
271 | ri.diff = NRL_MAXDIF; |
231 | ri.last = NOW; |
272 | ri.last = ev_now (); |
232 | |
273 | |
233 | push_front (ri); |
274 | push_front (ri); |
234 | |
275 | |
235 | return true; |
276 | return true; |
236 | } |
277 | } |
237 | else |
278 | else |
238 | { |
279 | { |
239 | net_rateinfo ri (*i); |
280 | net_rateinfo ri (*i); |
240 | erase (i); |
281 | erase (i); |
241 | |
282 | |
242 | ri.pcnt = ri.pcnt * ALPHA; |
283 | ri.pcnt = ri.pcnt * NRL_ALPHA; |
243 | ri.diff = ri.diff * ALPHA + (NOW - ri.last); |
284 | ri.diff = ri.diff * NRL_ALPHA + (ev_now () - ri.last); |
244 | |
285 | |
245 | ri.last = NOW; |
286 | ri.last = ev_now (); |
246 | |
287 | |
|
|
288 | double dif = ri.diff / ri.pcnt; |
|
|
289 | |
247 | bool send = ri.diff / ri.pcnt > CUTOFF; |
290 | bool send = dif > NRL_CUTOFF; |
248 | |
291 | |
|
|
292 | if (dif > NRL_MAXDIF) |
|
|
293 | { |
|
|
294 | ri.pcnt = 1.; |
|
|
295 | ri.diff = NRL_MAXDIF; |
|
|
296 | } |
249 | if (send) |
297 | else if (send) |
250 | ri.pcnt++; |
298 | ri.pcnt++; |
251 | |
299 | |
252 | push_front (ri); |
300 | push_front (ri); |
253 | |
301 | |
254 | return send; |
302 | return send; |
… | |
… | |
299 | } |
347 | } |
300 | |
348 | |
301 | #define MAXVPNDATA (MAX_MTU - 6 - 6) |
349 | #define MAXVPNDATA (MAX_MTU - 6 - 6) |
302 | #define DATAHDR (sizeof (u32) + RAND_SIZE) |
350 | #define DATAHDR (sizeof (u32) + RAND_SIZE) |
303 | |
351 | |
304 | struct vpndata_packet:vpn_packet |
352 | struct vpndata_packet : vpn_packet |
305 | { |
353 | { |
306 | u8 data[MAXVPNDATA + DATAHDR]; // seqno |
354 | u8 data[MAXVPNDATA + DATAHDR]; // seqno |
307 | |
355 | |
308 | void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
356 | void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
309 | tap_packet *unpack (connection *conn, u32 &seqno); |
357 | tap_packet *unpack (connection *conn, u32 &seqno); |
… | |
… | |
322 | int outl = 0, outl2; |
370 | int outl = 0, outl2; |
323 | ptype type = PT_DATA_UNCOMPRESSED; |
371 | ptype type = PT_DATA_UNCOMPRESSED; |
324 | |
372 | |
325 | #if ENABLE_COMPRESSION |
373 | #if ENABLE_COMPRESSION |
326 | u8 cdata[MAX_MTU]; |
374 | u8 cdata[MAX_MTU]; |
327 | u32 cl; |
|
|
328 | |
375 | |
|
|
376 | if (conn->features & ENABLE_COMPRESSION) |
|
|
377 | { |
329 | cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
378 | u32 cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
|
|
379 | |
330 | if (cl) |
380 | if (cl) |
331 | { |
381 | { |
332 | type = PT_DATA_COMPRESSED; |
382 | type = PT_DATA_COMPRESSED; |
333 | d = cdata; |
383 | d = cdata; |
334 | l = cl + 2; |
384 | l = cl + 2; |
335 | |
385 | |
336 | d[0] = cl >> 8; |
386 | d[0] = cl >> 8; |
337 | d[1] = cl; |
387 | d[1] = cl; |
|
|
388 | } |
338 | } |
389 | } |
339 | #endif |
390 | #endif |
340 | |
391 | |
341 | EVP_EncryptInit_ex (cctx, 0, 0, 0, 0); |
392 | require (EVP_EncryptInit_ex (cctx, 0, 0, 0, 0)); |
342 | |
393 | |
343 | struct { |
394 | struct { |
344 | #if RAND_SIZE |
395 | #if RAND_SIZE |
345 | u8 rnd[RAND_SIZE]; |
396 | u8 rnd[RAND_SIZE]; |
346 | #endif |
397 | #endif |
… | |
… | |
350 | datahdr.seqno = ntohl (seqno); |
401 | datahdr.seqno = ntohl (seqno); |
351 | #if RAND_SIZE |
402 | #if RAND_SIZE |
352 | RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE); |
403 | RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE); |
353 | #endif |
404 | #endif |
354 | |
405 | |
355 | EVP_EncryptUpdate (cctx, |
406 | require (EVP_EncryptUpdate (cctx, |
356 | (unsigned char *) data + outl, &outl2, |
407 | (unsigned char *) data + outl, &outl2, |
357 | (unsigned char *) &datahdr, DATAHDR); |
408 | (unsigned char *) &datahdr, DATAHDR)); |
358 | outl += outl2; |
409 | outl += outl2; |
359 | |
410 | |
360 | EVP_EncryptUpdate (cctx, |
411 | require (EVP_EncryptUpdate (cctx, |
361 | (unsigned char *) data + outl, &outl2, |
412 | (unsigned char *) data + outl, &outl2, |
362 | (unsigned char *) d, l); |
413 | (unsigned char *) d, l)); |
363 | outl += outl2; |
414 | outl += outl2; |
364 | |
415 | |
365 | EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2); |
416 | require (EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2)); |
366 | outl += outl2; |
417 | outl += outl2; |
367 | |
418 | |
368 | len = outl + data_hdr_size (); |
419 | len = outl + data_hdr_size (); |
369 | |
420 | |
370 | set_hdr (type, dst); |
421 | set_hdr (type, dst); |
… | |
… | |
379 | int outl = 0, outl2; |
430 | int outl = 0, outl2; |
380 | tap_packet *p = new tap_packet; |
431 | tap_packet *p = new tap_packet; |
381 | u8 *d; |
432 | u8 *d; |
382 | u32 l = len - data_hdr_size (); |
433 | u32 l = len - data_hdr_size (); |
383 | |
434 | |
384 | EVP_DecryptInit_ex (cctx, 0, 0, 0, 0); |
435 | require (EVP_DecryptInit_ex (cctx, 0, 0, 0, 0)); |
385 | |
436 | |
386 | #if ENABLE_COMPRESSION |
437 | #if ENABLE_COMPRESSION |
387 | u8 cdata[MAX_MTU]; |
438 | u8 cdata[MAX_MTU]; |
388 | |
439 | |
389 | if (type == PT_DATA_COMPRESSED) |
440 | if (type == PT_DATA_COMPRESSED) |
… | |
… | |
391 | else |
442 | else |
392 | #endif |
443 | #endif |
393 | d = &(*p)[6 + 6 - DATAHDR]; |
444 | d = &(*p)[6 + 6 - DATAHDR]; |
394 | |
445 | |
395 | /* this overwrites part of the src mac, but we fix that later */ |
446 | /* this overwrites part of the src mac, but we fix that later */ |
396 | EVP_DecryptUpdate (cctx, |
447 | require (EVP_DecryptUpdate (cctx, |
397 | d, &outl2, |
448 | d, &outl2, |
398 | (unsigned char *)&data, len - data_hdr_size ()); |
449 | (unsigned char *)&data, len - data_hdr_size ())); |
399 | outl += outl2; |
450 | outl += outl2; |
400 | |
451 | |
401 | EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2); |
452 | require (EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2)); |
402 | outl += outl2; |
453 | outl += outl2; |
403 | |
454 | |
404 | seqno = ntohl (*(u32 *)(d + RAND_SIZE)); |
455 | seqno = ntohl (*(u32 *)(d + RAND_SIZE)); |
405 | |
456 | |
406 | id2mac (dst () ? dst() : THISNODE->id, p->dst); |
457 | id2mac (dst () ? dst() : THISNODE->id, p->dst); |
… | |
… | |
435 | { |
486 | { |
436 | // actually, hmaclen cannot be checked because the hmac |
487 | // actually, hmaclen cannot be checked because the hmac |
437 | // field comes before this data, so peers with other |
488 | // field comes before this data, so peers with other |
438 | // hmacs simply will not work. |
489 | // hmacs simply will not work. |
439 | u8 prot_major, prot_minor, randsize, hmaclen; |
490 | u8 prot_major, prot_minor, randsize, hmaclen; |
440 | u8 flags, challengelen, pad2, pad3; |
491 | u8 flags, challengelen, features, pad3; |
441 | u32 cipher_nid, digest_nid, hmac_nid; |
492 | u32 cipher_nid, digest_nid, hmac_nid; |
442 | |
|
|
443 | const u8 curflags () const |
|
|
444 | { |
|
|
445 | return 0x80 |
|
|
446 | | (ENABLE_COMPRESSION ? 0x01 : 0x00); |
|
|
447 | } |
|
|
448 | |
493 | |
449 | void setup (ptype type, int dst); |
494 | void setup (ptype type, int dst); |
450 | bool chk_config () const; |
495 | bool chk_config () const; |
|
|
496 | |
|
|
497 | static u8 get_features () |
|
|
498 | { |
|
|
499 | u8 f = 0; |
|
|
500 | #if ENABLE_COMPRESSION |
|
|
501 | f |= FEATURE_COMPRESSION; |
|
|
502 | #endif |
|
|
503 | #if ENABLE_ROHC |
|
|
504 | f |= FEATURE_ROHC; |
|
|
505 | #endif |
|
|
506 | #if ENABLE_BRIDGING |
|
|
507 | f |= FEATURE_BRIDGING; |
|
|
508 | #endif |
|
|
509 | return f; |
|
|
510 | } |
451 | }; |
511 | }; |
452 | |
512 | |
453 | void config_packet::setup (ptype type, int dst) |
513 | void config_packet::setup (ptype type, int dst) |
454 | { |
514 | { |
455 | prot_major = PROTOCOL_MAJOR; |
515 | prot_major = PROTOCOL_MAJOR; |
456 | prot_minor = PROTOCOL_MINOR; |
516 | prot_minor = PROTOCOL_MINOR; |
457 | randsize = RAND_SIZE; |
517 | randsize = RAND_SIZE; |
458 | hmaclen = HMACLENGTH; |
518 | hmaclen = HMACLENGTH; |
459 | flags = curflags (); |
519 | flags = 0; |
460 | challengelen = sizeof (rsachallenge); |
520 | challengelen = sizeof (rsachallenge); |
|
|
521 | features = get_features (); |
461 | |
522 | |
462 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
523 | cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
463 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
524 | digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
464 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
525 | hmac_nid = htonl (EVP_MD_type (DIGEST)); |
465 | |
526 | |
… | |
… | |
467 | set_hdr (type, dst); |
528 | set_hdr (type, dst); |
468 | } |
529 | } |
469 | |
530 | |
470 | bool config_packet::chk_config () const |
531 | bool config_packet::chk_config () const |
471 | { |
532 | { |
472 | return prot_major == PROTOCOL_MAJOR |
533 | if (prot_major != PROTOCOL_MAJOR) |
473 | && randsize == RAND_SIZE |
534 | slog (L_WARN, _("major version mismatch (remote %d <=> local %d)"), prot_major, PROTOCOL_MAJOR); |
474 | && hmaclen == HMACLENGTH |
535 | else if (randsize != RAND_SIZE) |
475 | && flags == curflags () |
536 | slog (L_WARN, _("rand size mismatch (remote %d <=> local %d)"), randsize, RAND_SIZE); |
|
|
537 | else if (hmaclen != HMACLENGTH) |
|
|
538 | slog (L_WARN, _("hmac length mismatch (remote %d <=> local %d)"), hmaclen, HMACLENGTH); |
476 | && challengelen == sizeof (rsachallenge) |
539 | else if (challengelen != sizeof (rsachallenge)) |
|
|
540 | slog (L_WARN, _("challenge length mismatch (remote %d <=> local %d)"), challengelen, sizeof (rsachallenge)); |
477 | && cipher_nid == htonl (EVP_CIPHER_nid (CIPHER)) |
541 | else if (cipher_nid != htonl (EVP_CIPHER_nid (CIPHER))) |
|
|
542 | slog (L_WARN, _("cipher mismatch (remote %x <=> local %x)"), ntohl (cipher_nid), EVP_CIPHER_nid (CIPHER)); |
478 | && digest_nid == htonl (EVP_MD_type (RSA_HASH)) |
543 | else if (digest_nid != htonl (EVP_MD_type (RSA_HASH))) |
|
|
544 | slog (L_WARN, _("digest mismatch (remote %x <=> local %x)"), ntohl (digest_nid), EVP_MD_type (RSA_HASH)); |
479 | && hmac_nid == htonl (EVP_MD_type (DIGEST)); |
545 | else if (hmac_nid != htonl (EVP_MD_type (DIGEST))) |
|
|
546 | slog (L_WARN, _("hmac mismatch (remote %x <=> local %x)"), ntohl (hmac_nid), EVP_MD_type (DIGEST)); |
|
|
547 | else |
|
|
548 | return true; |
|
|
549 | |
|
|
550 | return false; |
480 | } |
551 | } |
481 | |
552 | |
482 | struct auth_req_packet : config_packet |
553 | struct auth_req_packet : config_packet |
483 | { |
554 | { |
484 | char magic[8]; |
555 | char magic[8]; |
485 | u8 initiate; // false if this is just an automatic reply |
556 | u8 initiate; // false if this is just an automatic reply |
486 | u8 protocols; // supported protocols (will get patches on forward) |
557 | u8 protocols; // supported protocols (will be patched on forward) |
487 | u8 pad2, pad3; |
558 | u8 pad2, pad3; |
488 | rsaid id; |
559 | rsaid id; |
489 | rsaencrdata encr; |
560 | rsaencrdata encr; |
490 | |
561 | |
491 | auth_req_packet (int dst, bool initiate_, u8 protocols_) |
562 | auth_req_packet (int dst, bool initiate_, u8 protocols_) |
… | |
… | |
546 | }; |
617 | }; |
547 | |
618 | |
548 | ///////////////////////////////////////////////////////////////////////////// |
619 | ///////////////////////////////////////////////////////////////////////////// |
549 | |
620 | |
550 | void |
621 | void |
|
|
622 | connection::connection_established () |
|
|
623 | { |
|
|
624 | slog (L_TRACE, _("%s: possible connection establish (ictx %d, octx %d)"), conf->nodename, !!ictx, !!octx); |
|
|
625 | |
|
|
626 | if (ictx && octx) |
|
|
627 | { |
|
|
628 | // make sure rekeying timeouts are slightly asymmetric |
|
|
629 | ev::tstamp rekey_interval = ::conf.rekey + (conf->id > THISNODE->id ? 10 : 0); |
|
|
630 | rekey.start (rekey_interval, rekey_interval); |
|
|
631 | keepalive.start (::conf.keepalive); |
|
|
632 | |
|
|
633 | // send queued packets |
|
|
634 | if (ictx && octx) |
|
|
635 | { |
|
|
636 | while (tap_packet *p = (tap_packet *)data_queue.get ()) |
|
|
637 | { |
|
|
638 | if (p->len) send_data_packet (p); |
|
|
639 | delete p; |
|
|
640 | } |
|
|
641 | |
|
|
642 | while (vpn_packet *p = (vpn_packet *)vpn_queue.get ()) |
|
|
643 | { |
|
|
644 | if (p->len) send_vpn_packet (p, si, IPTOS_RELIABILITY); |
|
|
645 | delete p; |
|
|
646 | } |
|
|
647 | } |
|
|
648 | } |
|
|
649 | else |
|
|
650 | { |
|
|
651 | retry_cnt = 0; |
|
|
652 | establish_connection.start (5); |
|
|
653 | keepalive.stop (); |
|
|
654 | rekey.stop (); |
|
|
655 | } |
|
|
656 | } |
|
|
657 | |
|
|
658 | void |
551 | connection::reset_si () |
659 | connection::reset_si () |
552 | { |
660 | { |
553 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
661 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
554 | |
662 | |
555 | // mask out protocols we cannot establish |
663 | // mask out protocols we cannot establish |
556 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
664 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
557 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
665 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
|
|
666 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
|
|
667 | |
|
|
668 | if (protocol |
|
|
669 | && (!conf->can_direct (THISNODE) |
|
|
670 | || !THISNODE->can_direct (conf))) |
|
|
671 | { |
|
|
672 | slog (L_DEBUG, _("%s: direct connection denied"), conf->nodename); |
|
|
673 | protocol = 0; |
|
|
674 | } |
558 | |
675 | |
559 | si.set (conf, protocol); |
676 | si.set (conf, protocol); |
560 | } |
677 | } |
561 | |
678 | |
562 | // ensure sockinfo is valid, forward if necessary |
679 | // ensure sockinfo is valid, forward if necessary |
… | |
… | |
567 | { |
684 | { |
568 | connection *r = vpn->find_router (); |
685 | connection *r = vpn->find_router (); |
569 | |
686 | |
570 | if (r) |
687 | if (r) |
571 | { |
688 | { |
572 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"), |
689 | slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s (%s)"), |
573 | conf->nodename, r->conf->nodename); |
690 | conf->nodename, r->conf->nodename, (const char *)r->si); |
574 | return r->si; |
691 | return r->si; |
575 | } |
692 | } |
576 | else |
693 | else |
577 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
694 | slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
578 | conf->nodename); |
695 | conf->nodename); |
… | |
… | |
580 | |
697 | |
581 | return si; |
698 | return si; |
582 | } |
699 | } |
583 | |
700 | |
584 | void |
701 | void |
|
|
702 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
703 | { |
|
|
704 | if (!vpn->send_vpn_packet (pkt, si, tos)) |
|
|
705 | reset_connection (); |
|
|
706 | } |
|
|
707 | |
|
|
708 | void |
585 | connection::send_ping (const sockinfo &si, u8 pong) |
709 | connection::send_ping (const sockinfo &si, u8 pong) |
586 | { |
710 | { |
587 | ping_packet *pkt = new ping_packet; |
711 | ping_packet *pkt = new ping_packet; |
588 | |
712 | |
589 | pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING); |
713 | pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING); |
590 | vpn->send_vpn_packet (pkt, si, IPTOS_LOWDELAY); |
714 | send_vpn_packet (pkt, si, IPTOS_LOWDELAY); |
591 | |
715 | |
592 | delete pkt; |
716 | delete pkt; |
593 | } |
717 | } |
594 | |
718 | |
595 | void |
719 | void |
… | |
… | |
598 | if (reset_rate_limiter.can (si) && connectmode != conf_node::C_DISABLED) |
722 | if (reset_rate_limiter.can (si) && connectmode != conf_node::C_DISABLED) |
599 | { |
723 | { |
600 | config_packet *pkt = new config_packet; |
724 | config_packet *pkt = new config_packet; |
601 | |
725 | |
602 | pkt->setup (vpn_packet::PT_RESET, conf->id); |
726 | pkt->setup (vpn_packet::PT_RESET, conf->id); |
603 | vpn->send_vpn_packet (pkt, si, IPTOS_MINCOST); |
727 | send_vpn_packet (pkt, si, IPTOS_MINCOST); |
604 | |
728 | |
605 | delete pkt; |
729 | delete pkt; |
606 | } |
730 | } |
607 | } |
731 | } |
608 | |
732 | |
… | |
… | |
610 | connection::send_auth_request (const sockinfo &si, bool initiate) |
734 | connection::send_auth_request (const sockinfo &si, bool initiate) |
611 | { |
735 | { |
612 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
736 | auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
613 | |
737 | |
614 | rsachallenge chg; |
738 | rsachallenge chg; |
615 | |
|
|
616 | rsa_cache.gen (pkt->id, chg); |
739 | rsa_cache.gen (pkt->id, chg); |
617 | |
740 | rsa_encrypt (conf->rsa_key, chg, pkt->encr); |
618 | if (0 > RSA_public_encrypt (sizeof chg, |
|
|
619 | (unsigned char *)&chg, (unsigned char *)&pkt->encr, |
|
|
620 | conf->rsa_key, RSA_PKCS1_OAEP_PADDING)) |
|
|
621 | fatal ("RSA_public_encrypt error"); |
|
|
622 | |
741 | |
623 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
742 | slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
624 | |
743 | |
625 | vpn->send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
744 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
626 | |
|
|
627 | |
745 | |
628 | delete pkt; |
746 | delete pkt; |
629 | } |
747 | } |
630 | |
748 | |
631 | void |
749 | void |
… | |
… | |
639 | |
757 | |
640 | pkt->hmac_set (octx); |
758 | pkt->hmac_set (octx); |
641 | |
759 | |
642 | slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si); |
760 | slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si); |
643 | |
761 | |
644 | vpn->send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly |
762 | send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly |
645 | |
763 | |
646 | delete pkt; |
764 | delete pkt; |
647 | } |
765 | } |
648 | |
766 | |
649 | void |
767 | void |
650 | connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
768 | connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
651 | { |
769 | { |
652 | slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n", |
770 | slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)", |
653 | conf->id, rid, (const char *)rsi); |
771 | conf->id, rid, (const char *)rsi); |
654 | |
772 | |
655 | connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
773 | connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
656 | |
774 | |
657 | r->hmac_set (octx); |
775 | r->hmac_set (octx); |
658 | vpn->send_vpn_packet (r, si); |
776 | send_vpn_packet (r, si); |
659 | |
777 | |
660 | delete r; |
778 | delete r; |
661 | } |
779 | } |
662 | |
780 | |
663 | void |
781 | inline void |
664 | connection::establish_connection_cb (time_watcher &w) |
782 | connection::establish_connection_cb (ev::timer &w, int revents) |
665 | { |
783 | { |
666 | if (ictx || conf == THISNODE |
784 | if (!ictx |
|
|
785 | && conf != THISNODE |
667 | || connectmode == conf_node::C_NEVER |
786 | && connectmode != conf_node::C_NEVER |
668 | || connectmode == conf_node::C_DISABLED) |
787 | && connectmode != conf_node::C_DISABLED |
669 | w.at = TSTAMP_CANCEL; |
788 | && !w.is_active ()) |
670 | else if (w.at <= NOW) |
|
|
671 | { |
789 | { |
672 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
790 | // a bit hacky, if ondemand, and packets are no longer queued, then reset the connection |
673 | |
791 | // and stop trying. should probably be handled by a per-connection expire handler. |
674 | if (retry_int < 3600 * 8) |
792 | if (connectmode == conf_node::C_ONDEMAND && vpn_queue.empty () && data_queue.empty ()) |
|
|
793 | { |
|
|
794 | reset_connection (); |
675 | retry_cnt++; |
795 | return; |
|
|
796 | } |
676 | |
797 | |
677 | w.at = NOW + retry_int; |
798 | ev::tstamp retry_int = ev::tstamp (retry_cnt & 3 |
|
|
799 | ? (retry_cnt & 3) + 1 |
|
|
800 | : 1 << (retry_cnt >> 2)); |
678 | |
801 | |
679 | reset_si (); |
802 | reset_si (); |
680 | |
803 | |
|
|
804 | bool slow = si.prot & PROT_SLOW; |
|
|
805 | |
681 | if (si.prot && !si.host) |
806 | if (si.prot && !si.host) |
|
|
807 | { |
|
|
808 | slog (L_TRACE, _("%s: connection request (indirect)"), conf->nodename); |
|
|
809 | /*TODO*/ /* start the timer so we don't recurse endlessly */ |
|
|
810 | w.start (1); |
682 | vpn->connect_request (conf->id); |
811 | vpn->send_connect_request (conf->id); |
|
|
812 | } |
683 | else |
813 | else |
684 | { |
814 | { |
|
|
815 | slog (L_TRACE, _("%s: connection request (direct)"), conf->nodename, !!ictx, !!octx); |
|
|
816 | |
685 | const sockinfo &dsi = forward_si (si); |
817 | const sockinfo &dsi = forward_si (si); |
|
|
818 | |
|
|
819 | slow = slow || (dsi.prot & PROT_SLOW); |
686 | |
820 | |
687 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
821 | if (dsi.valid () && auth_rate_limiter.can (dsi)) |
688 | { |
822 | { |
689 | if (retry_cnt < 4) |
823 | if (retry_cnt < 4) |
690 | send_auth_request (dsi, true); |
824 | send_auth_request (dsi, true); |
691 | else |
825 | else |
692 | send_ping (dsi, 0); |
826 | send_ping (dsi, 0); |
693 | } |
827 | } |
694 | } |
828 | } |
|
|
829 | |
|
|
830 | retry_int *= slow ? 8. : 0.7; |
|
|
831 | |
|
|
832 | if (retry_int < conf->max_retry) |
|
|
833 | retry_cnt++; |
|
|
834 | else |
|
|
835 | retry_int = conf->max_retry; |
|
|
836 | |
|
|
837 | w.start (retry_int); |
695 | } |
838 | } |
696 | } |
839 | } |
697 | |
840 | |
698 | void |
841 | void |
699 | connection::reset_connection () |
842 | connection::reset_connection () |
… | |
… | |
702 | { |
845 | { |
703 | slog (L_INFO, _("%s(%s): connection lost"), |
846 | slog (L_INFO, _("%s(%s): connection lost"), |
704 | conf->nodename, (const char *)si); |
847 | conf->nodename, (const char *)si); |
705 | |
848 | |
706 | if (::conf.script_node_down) |
849 | if (::conf.script_node_down) |
707 | run_script (run_script_cb (this, &connection::script_node_down), false); |
850 | { |
|
|
851 | run_script_cb cb; |
|
|
852 | cb.set<connection, &connection::script_node_down> (this); |
|
|
853 | if (!run_script (cb, false)) |
|
|
854 | slog (L_WARN, _("node-down command execution failed, continuing.")); |
|
|
855 | } |
708 | } |
856 | } |
709 | |
857 | |
710 | delete ictx; ictx = 0; |
858 | delete ictx; ictx = 0; |
711 | delete octx; octx = 0; |
859 | delete octx; octx = 0; |
|
|
860 | #if ENABLE_DNS |
|
|
861 | dnsv4_reset_connection (); |
|
|
862 | #endif |
712 | |
863 | |
713 | si.host= 0; |
864 | si.host = 0; |
714 | |
865 | |
715 | last_activity = 0; |
866 | last_activity = 0; |
716 | retry_cnt = 0; |
867 | retry_cnt = 0; |
717 | |
868 | |
718 | rekey.reset (); |
869 | rekey.stop (); |
719 | keepalive.reset (); |
870 | keepalive.stop (); |
720 | establish_connection.reset (); |
871 | establish_connection.stop (); |
721 | } |
872 | } |
722 | |
873 | |
723 | void |
874 | void |
724 | connection::shutdown () |
875 | connection::shutdown () |
725 | { |
876 | { |
… | |
… | |
727 | send_reset (si); |
878 | send_reset (si); |
728 | |
879 | |
729 | reset_connection (); |
880 | reset_connection (); |
730 | } |
881 | } |
731 | |
882 | |
732 | void |
883 | inline void |
733 | connection::rekey_cb (time_watcher &w) |
884 | connection::rekey_cb (ev::timer &w, int revents) |
734 | { |
885 | { |
735 | w.at = TSTAMP_CANCEL; |
|
|
736 | |
|
|
737 | reset_connection (); |
886 | reset_connection (); |
738 | establish_connection (); |
887 | establish_connection (); |
739 | } |
888 | } |
740 | |
889 | |
741 | void |
890 | void |
742 | connection::send_data_packet (tap_packet *pkt, bool broadcast) |
891 | connection::send_data_packet (tap_packet *pkt) |
743 | { |
892 | { |
744 | vpndata_packet *p = new vpndata_packet; |
893 | vpndata_packet *p = new vpndata_packet; |
745 | int tos = 0; |
894 | int tos = 0; |
746 | |
895 | |
747 | if (conf->inherit_tos |
896 | // I am not hilarious about peeking into packets, but so be it. |
748 | && (*pkt)[12] == 0x08 && (*pkt)[13] == 0x00 // IP |
897 | if (conf->inherit_tos && pkt->is_ipv4 ()) |
749 | && ((*pkt)[14] & 0xf0) == 0x40) // IPv4 |
|
|
750 | tos = (*pkt)[15] & IPTOS_TOS_MASK; |
898 | tos = (*pkt)[15] & IPTOS_TOS_MASK; |
751 | |
899 | |
752 | p->setup (this, broadcast ? 0 : conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs |
900 | p->setup (this, conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs |
753 | vpn->send_vpn_packet (p, si, tos); |
901 | send_vpn_packet (p, si, tos); |
754 | |
902 | |
755 | delete p; |
903 | delete p; |
756 | |
904 | |
757 | if (oseqno > MAX_SEQNO) |
905 | if (oseqno > MAX_SEQNO) |
758 | rekey (); |
906 | rekey (); |
759 | } |
907 | } |
760 | |
908 | |
761 | void |
909 | void |
762 | connection::inject_data_packet (tap_packet *pkt, bool broadcast) |
910 | connection::inject_data_packet (tap_packet *pkt, bool broadcast/*TODO DDD*/) |
763 | { |
911 | { |
764 | if (ictx && octx) |
912 | if (ictx && octx) |
765 | send_data_packet (pkt, broadcast); |
913 | send_data_packet (pkt); |
766 | else |
914 | else |
767 | { |
915 | { |
768 | if (!broadcast)//DDDD |
916 | if (!broadcast) |
769 | queue.put (new tap_packet (*pkt)); |
917 | data_queue.put (new tap_packet (*pkt)); |
770 | |
918 | |
771 | establish_connection (); |
919 | establish_connection (); |
772 | } |
920 | } |
773 | } |
921 | } |
774 | |
922 | |
775 | void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
923 | void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
776 | { |
924 | { |
777 | if (ictx && octx) |
925 | if (ictx && octx) |
778 | vpn->send_vpn_packet (pkt, si, tos); |
926 | send_vpn_packet (pkt, si, tos); |
779 | else |
927 | else |
|
|
928 | { |
|
|
929 | vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); |
|
|
930 | |
780 | establish_connection (); |
931 | establish_connection (); |
|
|
932 | } |
781 | } |
933 | } |
782 | |
934 | |
783 | void |
935 | void |
784 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
936 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
785 | { |
937 | { |
786 | last_activity = NOW; |
938 | last_activity = ev_now (); |
787 | |
939 | |
788 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
940 | slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
789 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
941 | conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
|
|
942 | |
|
|
943 | if (connectmode == conf_node::C_DISABLED) |
|
|
944 | return; |
790 | |
945 | |
791 | switch (pkt->typ ()) |
946 | switch (pkt->typ ()) |
792 | { |
947 | { |
793 | case vpn_packet::PT_PING: |
948 | case vpn_packet::PT_PING: |
794 | // we send pings instead of auth packets after some retries, |
949 | // we send pings instead of auth packets after some retries, |
… | |
… | |
841 | if (p->initiate) |
996 | if (p->initiate) |
842 | send_auth_request (rsi, false); |
997 | send_auth_request (rsi, false); |
843 | |
998 | |
844 | rsachallenge k; |
999 | rsachallenge k; |
845 | |
1000 | |
846 | if (0 > RSA_private_decrypt (sizeof (p->encr), |
1001 | if (!rsa_decrypt (::conf.rsa_key, p->encr, k)) |
847 | (unsigned char *)&p->encr, (unsigned char *)&k, |
1002 | { |
848 | ::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
|
|
849 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted"), |
1003 | slog (L_ERR, _("%s(%s): challenge illegal or corrupted (%s). mismatched key or config file?"), |
850 | conf->nodename, (const char *)rsi); |
1004 | conf->nodename, (const char *)rsi, ERR_error_string (ERR_get_error (), 0)); |
|
|
1005 | break; |
|
|
1006 | } |
851 | else |
1007 | else |
852 | { |
1008 | { |
853 | retry_cnt = 0; |
|
|
854 | establish_connection.start (NOW + 8); //? ;) |
|
|
855 | keepalive.reset (); |
|
|
856 | rekey.reset (); |
|
|
857 | |
|
|
858 | delete ictx; |
|
|
859 | ictx = 0; |
|
|
860 | |
|
|
861 | delete octx; |
1009 | delete octx; |
862 | |
1010 | |
863 | octx = new crypto_ctx (k, 1); |
1011 | octx = new crypto_ctx (k, 1); |
864 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
1012 | oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
865 | |
1013 | |
866 | conf->protocols = p->protocols; |
1014 | conf->protocols = p->protocols; |
|
|
1015 | features = p->features & config_packet::get_features (); |
|
|
1016 | |
867 | send_auth_response (rsi, p->id, k); |
1017 | send_auth_response (rsi, p->id, k); |
|
|
1018 | |
|
|
1019 | connection_established (); |
868 | |
1020 | |
869 | break; |
1021 | break; |
870 | } |
1022 | } |
871 | } |
1023 | } |
|
|
1024 | else |
|
|
1025 | slog (L_WARN, _("%s(%s): protocol mismatch"), |
|
|
1026 | conf->nodename, (const char *)rsi); |
872 | |
1027 | |
873 | send_reset (rsi); |
1028 | send_reset (rsi); |
874 | } |
1029 | } |
875 | |
1030 | |
876 | break; |
1031 | break; |
… | |
… | |
889 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
1044 | PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
890 | |
1045 | |
891 | rsachallenge chg; |
1046 | rsachallenge chg; |
892 | |
1047 | |
893 | if (!rsa_cache.find (p->id, chg)) |
1048 | if (!rsa_cache.find (p->id, chg)) |
|
|
1049 | { |
894 | slog (L_ERR, _("%s(%s): unrequested auth response"), |
1050 | slog (L_ERR, _("%s(%s): unrequested auth response ignored"), |
895 | conf->nodename, (const char *)rsi); |
1051 | conf->nodename, (const char *)rsi); |
|
|
1052 | break; |
|
|
1053 | } |
896 | else |
1054 | else |
897 | { |
1055 | { |
898 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
1056 | crypto_ctx *cctx = new crypto_ctx (chg, 0); |
899 | |
1057 | |
900 | if (!p->hmac_chk (cctx)) |
1058 | if (!p->hmac_chk (cctx)) |
|
|
1059 | { |
901 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
1060 | slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
902 | "could be an attack, or just corruption or an synchronization error"), |
1061 | "could be an attack, or just corruption or a synchronization error"), |
903 | conf->nodename, (const char *)rsi); |
1062 | conf->nodename, (const char *)rsi); |
|
|
1063 | break; |
|
|
1064 | } |
904 | else |
1065 | else |
905 | { |
1066 | { |
906 | rsaresponse h; |
1067 | rsaresponse h; |
907 | |
1068 | |
908 | rsa_hash (p->id, chg, h); |
1069 | rsa_hash (p->id, chg, h); |
… | |
… | |
916 | iseqno.reset (ntohl (*(u32 *)&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid |
1077 | iseqno.reset (ntohl (*(u32 *)&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid |
917 | |
1078 | |
918 | si = rsi; |
1079 | si = rsi; |
919 | protocol = rsi.prot; |
1080 | protocol = rsi.prot; |
920 | |
1081 | |
921 | rekey.start (NOW + ::conf.rekey); |
1082 | connection_established (); |
922 | keepalive.start (NOW + ::conf.keepalive); |
|
|
923 | |
|
|
924 | // send queued packets |
|
|
925 | while (tap_packet *p = queue.get ()) |
|
|
926 | { |
|
|
927 | send_data_packet (p); |
|
|
928 | delete p; |
|
|
929 | } |
|
|
930 | |
|
|
931 | connectmode = conf->connectmode; |
|
|
932 | |
1083 | |
933 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
1084 | slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
934 | conf->nodename, (const char *)rsi, |
1085 | conf->nodename, (const char *)rsi, |
935 | p->prot_major, p->prot_minor); |
1086 | p->prot_major, p->prot_minor); |
936 | |
1087 | |
937 | if (::conf.script_node_up) |
1088 | if (::conf.script_node_up) |
938 | run_script (run_script_cb (this, &connection::script_node_up), false); |
1089 | { |
|
|
1090 | run_script_cb cb; |
|
|
1091 | cb.set<connection, &connection::script_node_up> (this); |
|
|
1092 | if (!run_script (cb, false)) |
|
|
1093 | slog (L_WARN, _("node-up command execution failed, continuing.")); |
|
|
1094 | } |
939 | |
1095 | |
940 | break; |
1096 | break; |
941 | } |
1097 | } |
942 | else |
1098 | else |
943 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
1099 | slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
… | |
… | |
962 | |
1118 | |
963 | if (ictx && octx) |
1119 | if (ictx && octx) |
964 | { |
1120 | { |
965 | vpndata_packet *p = (vpndata_packet *)pkt; |
1121 | vpndata_packet *p = (vpndata_packet *)pkt; |
966 | |
1122 | |
967 | if (rsi == si) |
1123 | if (!p->hmac_chk (ictx)) |
|
|
1124 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
|
|
1125 | "could be an attack, or just corruption or a synchronization error"), |
|
|
1126 | conf->nodename, (const char *)rsi); |
|
|
1127 | else |
968 | { |
1128 | { |
969 | if (!p->hmac_chk (ictx)) |
|
|
970 | slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
|
|
971 | "could be an attack, or just corruption or an synchronization error"), |
|
|
972 | conf->nodename, (const char *)rsi); |
|
|
973 | else |
1129 | u32 seqno; |
|
|
1130 | tap_packet *d = p->unpack (this, seqno); |
|
|
1131 | |
|
|
1132 | if (iseqno.recv_ok (seqno)) |
974 | { |
1133 | { |
975 | u32 seqno; |
1134 | vpn->tap->send (d); |
976 | tap_packet *d = p->unpack (this, seqno); |
|
|
977 | |
1135 | |
978 | if (iseqno.recv_ok (seqno)) |
1136 | if (si != rsi) |
979 | { |
1137 | { |
980 | vpn->tap->send (d); |
1138 | // fast re-sync on source address changes, useful especially for tcp/ip |
981 | |
|
|
982 | if (p->dst () == 0) // re-broadcast |
|
|
983 | for (vpn::conns_vector::iterator i = vpn->conns.begin (); i != vpn->conns.end (); ++i) |
|
|
984 | { |
|
|
985 | connection *c = *i; |
|
|
986 | |
|
|
987 | if (c->conf != THISNODE && c->conf != conf) |
|
|
988 | c->inject_data_packet (d); |
|
|
989 | } |
|
|
990 | |
|
|
991 | delete d; |
|
|
992 | |
|
|
993 | break; |
1139 | si = rsi; |
|
|
1140 | |
|
|
1141 | slog (L_INFO, _("%s(%s): socket address changed to %s"), |
|
|
1142 | conf->nodename, (const char *)si, (const char *)rsi); |
994 | } |
1143 | } |
995 | } |
1144 | } |
|
|
1145 | |
|
|
1146 | delete d; |
|
|
1147 | break; |
996 | } |
1148 | } |
997 | else |
|
|
998 | slog (L_ERR, _("received data packet from unknown source %s"), (const char *)rsi); |
|
|
999 | } |
1149 | } |
1000 | |
1150 | |
1001 | send_reset (rsi); |
1151 | send_reset (rsi); |
1002 | break; |
1152 | break; |
1003 | |
1153 | |
1004 | case vpn_packet::PT_CONNECT_REQ: |
1154 | case vpn_packet::PT_CONNECT_REQ: |
1005 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1155 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1006 | { |
1156 | { |
1007 | connect_req_packet *p = (connect_req_packet *) pkt; |
1157 | connect_req_packet *p = (connect_req_packet *) pkt; |
1008 | |
1158 | |
1009 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1159 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1010 | connection *c = vpn->conns[p->id - 1]; |
|
|
1011 | conf->protocols = p->protocols; |
|
|
1012 | |
|
|
1013 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n", |
|
|
1014 | conf->id, p->id, c->ictx && c->octx); |
|
|
1015 | |
|
|
1016 | if (c->ictx && c->octx) |
|
|
1017 | { |
1160 | { |
|
|
1161 | connection *c = vpn->conns[p->id - 1]; |
|
|
1162 | conf->protocols = p->protocols; |
|
|
1163 | |
|
|
1164 | slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]", |
|
|
1165 | conf->id, p->id, c->ictx && c->octx); |
|
|
1166 | |
|
|
1167 | if (c->ictx && c->octx) |
|
|
1168 | { |
1018 | // send connect_info packets to both sides, in case one is |
1169 | // send connect_info packets to both sides, in case one is |
1019 | // behind a nat firewall (or both ;) |
1170 | // behind a nat firewall (or both ;) |
1020 | c->send_connect_info (conf->id, si, conf->protocols); |
1171 | c->send_connect_info (conf->id, si, conf->protocols); |
1021 | send_connect_info (c->conf->id, c->si, c->conf->protocols); |
1172 | send_connect_info (c->conf->id, c->si, c->conf->protocols); |
|
|
1173 | } |
|
|
1174 | else |
|
|
1175 | c->establish_connection (); |
1022 | } |
1176 | } |
|
|
1177 | else |
|
|
1178 | slog (L_WARN, |
|
|
1179 | _("received authenticated connection request from unknown node #%d, config file mismatch?"), |
|
|
1180 | p->id); |
1023 | } |
1181 | } |
1024 | |
1182 | |
1025 | break; |
1183 | break; |
1026 | |
1184 | |
1027 | case vpn_packet::PT_CONNECT_INFO: |
1185 | case vpn_packet::PT_CONNECT_INFO: |
1028 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1186 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1029 | { |
1187 | { |
1030 | connect_info_packet *p = (connect_info_packet *) pkt; |
1188 | connect_info_packet *p = (connect_info_packet *)pkt; |
1031 | |
1189 | |
1032 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1190 | if (p->id > 0 && p->id <= vpn->conns.size ()) |
1033 | |
1191 | { |
1034 | connection *c = vpn->conns[p->id - 1]; |
1192 | connection *c = vpn->conns[p->id - 1]; |
1035 | |
1193 | |
1036 | c->conf->protocols = p->protocols; |
1194 | c->conf->protocols = p->protocols; |
1037 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1195 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1038 | p->si.upgrade_protocol (protocol, c->conf); |
1196 | p->si.upgrade_protocol (protocol, c->conf); |
1039 | |
1197 | |
1040 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1198 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1041 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1199 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1042 | |
1200 | |
1043 | const sockinfo &dsi = forward_si (p->si); |
1201 | const sockinfo &dsi = forward_si (p->si); |
1044 | |
1202 | |
1045 | if (dsi.valid ()) |
1203 | if (dsi.valid ()) |
1046 | c->send_auth_request (dsi, true); |
1204 | c->send_auth_request (dsi, true); |
|
|
1205 | } |
|
|
1206 | else |
|
|
1207 | slog (L_WARN, |
|
|
1208 | _("received authenticated connection request from unknown node #%d, config file mismatch?"), |
|
|
1209 | p->id); |
1047 | } |
1210 | } |
1048 | |
1211 | |
1049 | break; |
1212 | break; |
1050 | |
1213 | |
1051 | default: |
1214 | default: |
1052 | send_reset (rsi); |
1215 | send_reset (rsi); |
1053 | break; |
1216 | break; |
1054 | } |
1217 | } |
1055 | } |
1218 | } |
1056 | |
1219 | |
1057 | void connection::keepalive_cb (time_watcher &w) |
1220 | inline void |
|
|
1221 | connection::keepalive_cb (ev::timer &w, int revents) |
1058 | { |
1222 | { |
1059 | if (NOW >= last_activity + ::conf.keepalive + 30) |
1223 | if (ev_now () >= last_activity + ::conf.keepalive + 30) |
1060 | { |
1224 | { |
1061 | reset_connection (); |
1225 | reset_connection (); |
1062 | establish_connection (); |
1226 | establish_connection (); |
1063 | } |
1227 | } |
1064 | else if (NOW < last_activity + ::conf.keepalive) |
1228 | else if (ev_now () < last_activity + ::conf.keepalive) |
1065 | w.at = last_activity + ::conf.keepalive; |
1229 | w.start (last_activity + ::conf.keepalive - ev::now ()); |
1066 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1230 | else if (conf->connectmode != conf_node::C_ONDEMAND |
1067 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1231 | || THISNODE->connectmode != conf_node::C_ONDEMAND) |
1068 | { |
1232 | { |
1069 | send_ping (si); |
1233 | send_ping (si); |
1070 | w.at = NOW + 5; |
1234 | w.start (5); |
1071 | } |
1235 | } |
|
|
1236 | else if (ev_now () < last_activity + ::conf.keepalive + 10) |
|
|
1237 | // hold ondemand connections implicitly a few seconds longer |
|
|
1238 | // should delete octx, though, or something like that ;) |
|
|
1239 | w.start (last_activity + ::conf.keepalive + 10 - ev::now ()); |
1072 | else |
1240 | else |
1073 | reset_connection (); |
1241 | reset_connection (); |
1074 | } |
1242 | } |
1075 | |
1243 | |
1076 | void connection::connect_request (int id) |
1244 | void connection::send_connect_request (int id) |
1077 | { |
1245 | { |
1078 | connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols); |
1246 | connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols); |
1079 | |
1247 | |
1080 | slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id); |
1248 | slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id); |
1081 | p->hmac_set (octx); |
1249 | p->hmac_set (octx); |
1082 | vpn->send_vpn_packet (p, si); |
1250 | send_vpn_packet (p, si); |
1083 | |
1251 | |
1084 | delete p; |
1252 | delete p; |
1085 | } |
1253 | } |
1086 | |
1254 | |
|
|
1255 | void connection::script_init_env (const char *ext) |
|
|
1256 | { |
|
|
1257 | char *env; |
|
|
1258 | asprintf (&env, "IFUPDATA%s=%s", ext, conf->if_up_data); putenv (env); |
|
|
1259 | asprintf (&env, "NODENAME%s=%s", ext, conf->nodename); putenv (env); |
|
|
1260 | asprintf (&env, "MAC%s=%02x:%02x:%02x:%02x:%02x:%02x", ext, |
|
|
1261 | 0xfe, 0xfd, 0x80, 0x00, conf->id >> 8, |
|
|
1262 | conf->id & 0xff); putenv (env); |
|
|
1263 | } |
|
|
1264 | |
1087 | void connection::script_node () |
1265 | void connection::script_init_connect_env () |
1088 | { |
1266 | { |
1089 | vpn->script_if_up (); |
1267 | vpn->script_init_env (); |
1090 | |
1268 | |
1091 | char *env; |
1269 | char *env; |
1092 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1270 | asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1093 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1271 | asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1094 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1272 | asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1095 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1273 | asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1096 | } |
1274 | } |
1097 | |
1275 | |
|
|
1276 | inline const char * |
1098 | const char *connection::script_node_up () |
1277 | connection::script_node_up () |
1099 | { |
1278 | { |
1100 | script_node (); |
1279 | script_init_connect_env (); |
1101 | |
1280 | |
1102 | putenv ("STATE=up"); |
1281 | putenv ((char *)"STATE=up"); |
1103 | |
1282 | |
|
|
1283 | char *filename; |
|
|
1284 | asprintf (&filename, |
|
|
1285 | "%s/%s", |
|
|
1286 | confbase, |
1104 | return ::conf.script_node_up ? ::conf.script_node_up : "node-up"; |
1287 | ::conf.script_node_up ? ::conf.script_node_up : "node-up"); |
1105 | } |
|
|
1106 | |
1288 | |
|
|
1289 | return filename; |
|
|
1290 | } |
|
|
1291 | |
|
|
1292 | inline const char * |
1107 | const char *connection::script_node_down () |
1293 | connection::script_node_down () |
1108 | { |
1294 | { |
1109 | script_node (); |
1295 | script_init_connect_env (); |
1110 | |
1296 | |
1111 | putenv ("STATE=down"); |
1297 | putenv ((char *)"STATE=down"); |
1112 | |
1298 | |
1113 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1299 | char *filename; |
1114 | } |
1300 | asprintf (&filename, |
|
|
1301 | "%s/%s", |
|
|
1302 | confbase, |
|
|
1303 | ::conf.script_node_down ? ::conf.script_node_down : "node-down"); |
1115 | |
1304 | |
|
|
1305 | return filename; |
|
|
1306 | } |
|
|
1307 | |
1116 | connection::connection(struct vpn *vpn_) |
1308 | connection::connection (struct vpn *vpn, conf_node *conf) |
1117 | : vpn(vpn_) |
1309 | : vpn(vpn), conf(conf), |
1118 | , rekey (this, &connection::rekey_cb) |
1310 | #if ENABLE_DNS |
1119 | , keepalive (this, &connection::keepalive_cb) |
1311 | dns (0), |
|
|
1312 | #endif |
|
|
1313 | data_queue(conf->max_ttl, conf->max_queue), |
|
|
1314 | vpn_queue(conf->max_ttl, conf->max_queue) |
|
|
1315 | { |
|
|
1316 | rekey .set<connection, &connection::rekey_cb > (this); |
|
|
1317 | keepalive .set<connection, &connection::keepalive_cb > (this); |
1120 | , establish_connection (this, &connection::establish_connection_cb) |
1318 | establish_connection.set<connection, &connection::establish_connection_cb> (this); |
1121 | { |
1319 | |
1122 | octx = ictx = 0; |
1320 | octx = ictx = 0; |
1123 | retry_cnt = 0; |
1321 | retry_cnt = 0; |
1124 | |
1322 | |
1125 | connectmode = conf_node::C_ALWAYS; // initial setting |
1323 | if (!conf->protocols) // make sure some protocol is enabled |
|
|
1324 | conf->protocols = PROT_UDPv4; |
|
|
1325 | |
|
|
1326 | connectmode = conf->connectmode; |
|
|
1327 | |
|
|
1328 | // queue a dummy packet to force an initial connection attempt |
|
|
1329 | if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED) |
|
|
1330 | { |
|
|
1331 | net_packet *p = new net_packet; |
|
|
1332 | p->len = 0; |
|
|
1333 | vpn_queue.put (p); |
|
|
1334 | } |
|
|
1335 | |
1126 | reset_connection (); |
1336 | reset_connection (); |
1127 | } |
1337 | } |
1128 | |
1338 | |
1129 | connection::~connection () |
1339 | connection::~connection () |
1130 | { |
1340 | { |