1 | /* |
1 | /* |
2 | conf.c -- configuration code |
2 | conf.c -- configuration code |
3 | Copyright (C) 1998 Robert van der Meulen |
3 | Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> |
4 | 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
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5 | 2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
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6 | 2000 Cris van Pelt <tribbel@arise.dhs.org> |
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7 | 2003 Marc Lehmann <pcg@goof.com> |
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8 | |
4 | |
9 | This program is free software; you can redistribute it and/or modify |
5 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by |
6 | it under the terms of the GNU General Public License as published by |
11 | the Free Software Foundation; either version 2 of the License, or |
7 | the Free Software Foundation; either version 2 of the License, or |
12 | (at your option) any later version. |
8 | (at your option) any later version. |
… | |
… | |
31 | #include <netdb.h> |
27 | #include <netdb.h> |
32 | #include <sys/stat.h> |
28 | #include <sys/stat.h> |
33 | #include <sys/types.h> |
29 | #include <sys/types.h> |
34 | #include <unistd.h> |
30 | #include <unistd.h> |
35 | |
31 | |
36 | #include <netinet/in.h> |
32 | #include "netcompat.h" |
37 | #include <arpa/inet.h> |
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38 | #ifdef ENABLE_ICMP |
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39 | # ifdef HAVE_NETINET_IN_SYSTM_H |
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40 | # include <netinet/in_systm.h> |
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41 | # endif |
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42 | # ifdef HAVE_NETINET_IP_H |
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43 | # include <netinet/ip.h> |
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44 | # endif |
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45 | # include <netinet/ip_icmp.h> |
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46 | #endif |
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47 | |
33 | |
48 | #include <openssl/err.h> |
34 | #include <openssl/err.h> |
49 | #include <openssl/pem.h> |
35 | #include <openssl/pem.h> |
50 | #include <openssl/rsa.h> |
36 | #include <openssl/rsa.h> |
51 | #include <openssl/rand.h> |
37 | #include <openssl/rand.h> |
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38 | #include <openssl/bn.h> |
52 | |
39 | |
53 | #include "gettext.h" |
40 | #include "gettext.h" |
54 | |
41 | |
55 | #include "conf.h" |
42 | #include "conf.h" |
56 | #include "slog.h" |
43 | #include "slog.h" |
57 | #include "util.h" |
44 | #include "util.h" |
58 | |
45 | |
59 | char *confbase; |
46 | char *confbase; |
60 | char *thisnode; |
47 | char *thisnode; |
61 | char *identname; |
48 | char *identname; |
62 | char *pidfilename; |
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63 | |
49 | |
64 | struct configuration conf; |
50 | struct configuration conf; |
65 | |
51 | |
66 | u8 best_protocol (u8 protset) |
52 | u8 best_protocol (u8 protset) |
67 | { |
53 | { |
68 | if (protset & PROT_IPv4 ) return PROT_IPv4; |
54 | if (protset & PROT_IPv4 ) return PROT_IPv4; |
69 | if (protset & PROT_ICMPv4) return PROT_ICMPv4; |
55 | if (protset & PROT_ICMPv4) return PROT_ICMPv4; |
70 | if (protset & PROT_UDPv4 ) return PROT_UDPv4; |
56 | if (protset & PROT_UDPv4 ) return PROT_UDPv4; |
71 | if (protset & PROT_TCPv4 ) return PROT_TCPv4; |
57 | if (protset & PROT_TCPv4 ) return PROT_TCPv4; |
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58 | if (protset & PROT_DNSv4 ) return PROT_DNSv4; |
72 | |
59 | |
73 | return 0; |
60 | return 0; |
74 | } |
61 | } |
75 | |
62 | |
76 | const char *strprotocol (u8 protocol) |
63 | const char *strprotocol (u8 protocol) |
77 | { |
64 | { |
78 | if (protocol & PROT_IPv4 ) return "rawip"; |
65 | if (protocol & PROT_IPv4 ) return "rawip"; |
79 | if (protocol & PROT_ICMPv4) return "icmp"; |
66 | if (protocol & PROT_ICMPv4) return "icmp"; |
80 | if (protocol & PROT_UDPv4 ) return "udp"; |
67 | if (protocol & PROT_UDPv4 ) return "udp"; |
81 | if (protocol & PROT_TCPv4 ) return "tcp"; |
68 | if (protocol & PROT_TCPv4 ) return "tcp"; |
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69 | if (protocol & PROT_DNSv4 ) return "dns"; |
82 | |
70 | |
83 | return "<unknown>"; |
71 | return "<unknown>"; |
84 | } |
72 | } |
85 | |
73 | |
86 | void |
74 | void |
… | |
… | |
111 | |
99 | |
112 | void configuration::init () |
100 | void configuration::init () |
113 | { |
101 | { |
114 | memset (this, 0, sizeof (*this)); |
102 | memset (this, 0, sizeof (*this)); |
115 | |
103 | |
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104 | mtu = DEFAULT_MTU; |
116 | rekey = DEFAULT_REKEY; |
105 | rekey = DEFAULT_REKEY; |
117 | keepalive = DEFAULT_KEEPALIVE; |
106 | keepalive = DEFAULT_KEEPALIVE; |
118 | llevel = L_INFO; |
107 | llevel = L_INFO; |
119 | ip_proto = IPPROTO_GRE; |
108 | ip_proto = IPPROTO_GRE; |
120 | #if ENABLE_ICMP |
109 | #if ENABLE_ICMP |
121 | icmp_type = ICMP_ECHOREPLY; |
110 | icmp_type = ICMP_ECHOREPLY; |
122 | #endif |
111 | #endif |
123 | |
112 | |
124 | default_node.udp_port = DEFAULT_UDPPORT; |
113 | default_node.udp_port = DEFAULT_UDPPORT; |
125 | default_node.tcp_port = DEFAULT_UDPPORT; |
114 | default_node.tcp_port = DEFAULT_UDPPORT; // ehrm |
126 | default_node.connectmode = conf_node::C_ALWAYS; |
115 | default_node.connectmode = conf_node::C_ALWAYS; |
127 | default_node.compress = true; |
116 | default_node.compress = true; |
128 | default_node.protocols = PROT_UDPv4; |
117 | default_node.protocols = PROT_UDPv4; |
129 | } |
118 | } |
130 | |
119 | |
… | |
… | |
133 | if (rsa_key) |
122 | if (rsa_key) |
134 | RSA_free (rsa_key); |
123 | RSA_free (rsa_key); |
135 | |
124 | |
136 | rsa_key = 0; |
125 | rsa_key = 0; |
137 | |
126 | |
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127 | free (pidfilename); pidfilename = 0; |
138 | free (ifname); ifname = 0; |
128 | free (ifname); ifname = 0; |
139 | #if ENABLE_HTTP_PROXY |
129 | #if ENABLE_HTTP_PROXY |
140 | free (proxy_host); proxy_host = 0; |
130 | free (proxy_host); proxy_host = 0; |
141 | free (proxy_auth); proxy_auth = 0; |
131 | free (proxy_auth); proxy_auth = 0; |
142 | #endif |
132 | #endif |
143 | } |
133 | } |
144 | |
134 | |
145 | void |
135 | void |
146 | configuration::clear_config () |
136 | configuration::clear_config () |
… | |
… | |
238 | else |
228 | else |
239 | slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line); |
229 | slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line); |
240 | } |
230 | } |
241 | else if (!strcmp (var, "ip-proto")) |
231 | else if (!strcmp (var, "ip-proto")) |
242 | ip_proto = atoi (val); |
232 | ip_proto = atoi (val); |
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233 | else if (!strcmp (var, "icmp-type")) |
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234 | { |
243 | #if ENABLE_ICMP |
235 | #if ENABLE_ICMP |
244 | //TODO: error message |
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245 | else if (!strcmp (var, "icmp-type")) |
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246 | icmp_type = atoi (val); |
236 | icmp_type = atoi (val); |
247 | #endif |
237 | #endif |
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238 | } |
248 | |
239 | |
249 | // per config |
240 | // per config |
250 | else if (!strcmp (var, "node")) |
241 | else if (!strcmp (var, "node")) |
251 | { |
242 | { |
252 | default_node.id++; |
243 | default_node.id++; |
… | |
… | |
270 | |
261 | |
271 | if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL)) |
262 | if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL)) |
272 | { |
263 | { |
273 | ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
264 | ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
274 | slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
265 | slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
275 | exit (1); |
266 | exit (EXIT_FAILURE); |
276 | } |
267 | } |
277 | |
268 | |
278 | RSA_blinding_on (node->rsa_key, 0); |
269 | require (RSA_blinding_on (node->rsa_key, 0)); |
279 | |
270 | |
280 | fclose (f); |
271 | fclose (f); |
281 | } |
272 | } |
282 | else |
273 | else |
283 | { |
274 | { |
284 | slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno)); |
275 | slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno)); |
285 | |
276 | |
286 | if (need_keys) |
277 | if (need_keys) |
287 | exit (1); |
278 | exit (EXIT_FAILURE); |
288 | } |
279 | } |
289 | |
280 | |
290 | free (fname); |
281 | free (fname); |
291 | } |
282 | } |
292 | |
283 | |
293 | if (!::thisnode || !strcmp (node->nodename, ::thisnode)) |
284 | if (::thisnode && !strcmp (node->nodename, ::thisnode)) |
294 | thisnode = node; |
285 | thisnode = node; |
295 | } |
286 | } |
296 | else if (!strcmp (var, "private-key")) |
287 | else if (!strcmp (var, "private-key")) |
297 | prikeyfile = strdup (val); |
288 | free (prikeyfile), prikeyfile = strdup (val); |
298 | else if (!strcmp (var, "ifpersist")) |
289 | else if (!strcmp (var, "ifpersist")) |
299 | { |
290 | { |
300 | parse_bool (ifpersist, "ifpersist", true, false); |
291 | parse_bool (ifpersist, "ifpersist", true, false); |
301 | } |
292 | } |
302 | else if (!strcmp (var, "ifname")) |
293 | else if (!strcmp (var, "ifname")) |
303 | ifname = strdup (val); |
294 | free (ifname), ifname = strdup (val); |
304 | else if (!strcmp (var, "rekey")) |
295 | else if (!strcmp (var, "rekey")) |
305 | rekey = atoi (val); |
296 | rekey = atoi (val); |
306 | else if (!strcmp (var, "keepalive")) |
297 | else if (!strcmp (var, "keepalive")) |
307 | keepalive = atoi (val); |
298 | keepalive = atoi (val); |
308 | else if (!strcmp (var, "mtu")) |
299 | else if (!strcmp (var, "mtu")) |
309 | mtu = atoi (val); |
300 | mtu = atoi (val); |
310 | else if (!strcmp (var, "if-up")) |
301 | else if (!strcmp (var, "if-up")) |
311 | script_if_up = strdup (val); |
302 | free (script_if_up), script_if_up = strdup (val); |
312 | else if (!strcmp (var, "node-up")) |
303 | else if (!strcmp (var, "node-up")) |
313 | script_node_up = strdup (val); |
304 | free (script_node_up), script_node_up = strdup (val); |
314 | else if (!strcmp (var, "node-down")) |
305 | else if (!strcmp (var, "node-down")) |
315 | script_node_down = strdup (val); |
306 | free (script_node_down), script_node_down = strdup (val); |
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307 | else if (!strcmp (var, "pid-file")) |
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308 | free (pidfilename), pidfilename = strdup (val); |
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309 | else if (!strcmp (var, "http-proxy-host")) |
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310 | { |
316 | #if ENABLE_HTTP_PROXY |
311 | #if ENABLE_HTTP_PROXY |
317 | else if (!strcmp (var, "http-proxy-host")) |
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318 | proxy_host = strdup (val); |
312 | free (proxy_host), proxy_host = strdup (val); |
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313 | #endif |
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314 | } |
319 | else if (!strcmp (var, "http-proxy-port")) |
315 | else if (!strcmp (var, "http-proxy-port")) |
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316 | { |
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317 | #if ENABLE_HTTP_PROXY |
320 | proxy_port = atoi (val); |
318 | proxy_port = atoi (val); |
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319 | #endif |
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320 | } |
321 | else if (!strcmp (var, "http-proxy-auth")) |
321 | else if (!strcmp (var, "http-proxy-auth")) |
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322 | { |
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323 | #if ENABLE_HTTP_PROXY |
322 | proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val)); |
324 | proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val)); |
323 | #endif |
325 | #endif |
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326 | } |
324 | |
327 | |
325 | /* node-specific, non-defaultable */ |
328 | /* node-specific, non-defaultable */ |
326 | else if (node != &default_node && !strcmp (var, "hostname")) |
329 | else if (node != &default_node && !strcmp (var, "hostname")) |
327 | { |
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328 | free (node->hostname); |
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329 | node->hostname = strdup (val); |
330 | free (node->hostname), node->hostname = strdup (val); |
330 | } |
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331 | |
331 | |
332 | /* node-specific, defaultable */ |
332 | /* node-specific, defaultable */ |
333 | else if (!strcmp (var, "udp-port")) |
333 | else if (!strcmp (var, "udp-port")) |
334 | node->udp_port = atoi (val); |
334 | node->udp_port = atoi (val); |
335 | else if (!strcmp (var, "tcp-port")) |
335 | else if (!strcmp (var, "tcp-port")) |
336 | node->tcp_port = atoi (val); |
336 | node->tcp_port = atoi (val); |
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337 | else if (!strcmp (var, "dns-port")) |
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338 | node->dns_port = atoi (val); |
337 | else if (!strcmp (var, "router-priority")) |
339 | else if (!strcmp (var, "router-priority")) |
338 | node->routerprio = atoi (val); |
340 | node->routerprio = atoi (val); |
339 | else if (!strcmp (var, "connect")) |
341 | else if (!strcmp (var, "connect")) |
340 | { |
342 | { |
341 | if (!strcmp (val, "ondemand")) |
343 | if (!strcmp (val, "ondemand")) |
… | |
… | |
370 | { |
372 | { |
371 | #if ENABLE_ICMP |
373 | #if ENABLE_ICMP |
372 | u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v; |
374 | u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v; |
373 | #endif |
375 | #endif |
374 | } |
376 | } |
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377 | else if (!strcmp (var, "enable-dns")) |
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378 | { |
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379 | #if ENABLE_DNS |
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380 | u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) | v; |
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381 | #endif |
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382 | } |
375 | else if (!strcmp (var, "enable-udp")) |
383 | else if (!strcmp (var, "enable-udp")) |
376 | { |
384 | { |
377 | u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v; |
385 | u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v; |
378 | } |
386 | } |
379 | else if (!strcmp (var, "enable-rawip")) |
387 | else if (!strcmp (var, "enable-rawip")) |
380 | { |
388 | {; |
381 | u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v; |
389 | u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v; |
382 | } |
390 | } |
383 | |
391 | |
384 | // unknown or misplaced |
392 | // unknown or misplaced |
385 | else |
393 | else |
… | |
… | |
391 | fclose (f); |
399 | fclose (f); |
392 | } |
400 | } |
393 | else |
401 | else |
394 | { |
402 | { |
395 | slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno)); |
403 | slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno)); |
396 | exit (1); |
404 | exit (EXIT_FAILURE); |
397 | } |
405 | } |
398 | |
406 | |
399 | free (fname); |
407 | free (fname); |
400 | |
408 | |
401 | fname = config_filename (prikeyfile, "hostkey"); |
409 | fname = config_filename (prikeyfile, "hostkey"); |
… | |
… | |
407 | |
415 | |
408 | if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL)) |
416 | if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL)) |
409 | { |
417 | { |
410 | ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
418 | ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
411 | slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
419 | slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
412 | exit (1); |
420 | exit (EXIT_FAILURE); |
413 | } |
421 | } |
414 | |
422 | |
415 | RSA_blinding_on (rsa_key, 0); |
423 | require (RSA_blinding_on (rsa_key, 0)); |
416 | |
424 | |
417 | fclose (f); |
425 | fclose (f); |
418 | } |
426 | } |
419 | else |
427 | else |
420 | { |
428 | { |
421 | slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno)); |
429 | slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno)); |
422 | |
430 | |
423 | if (need_keys) |
431 | if (need_keys) |
424 | exit (1); |
432 | exit (EXIT_FAILURE); |
425 | } |
433 | } |
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434 | |
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435 | if (need_keys && ::thisnode |
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436 | && rsa_key && thisnode && thisnode->rsa_key) |
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437 | if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0 |
|
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438 | || BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0) |
|
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439 | { |
|
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440 | slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode); |
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441 | exit (EXIT_FAILURE); |
|
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442 | } |
426 | |
443 | |
427 | free (fname); |
444 | free (fname); |
428 | } |
445 | } |
429 | |
446 | |
430 | char *configuration::config_filename (const char *name, const char *dflt) |
447 | char *configuration::config_filename (const char *name, const char *dflt) |