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Comparing gvpe/src/conf.C (file contents):
Revision 1.9 by pcg, Wed Apr 2 05:14:59 2003 UTC vs.
Revision 1.40 by pcg, Mon Mar 28 20:39:18 2005 UTC

1/* 1/*
2 conf.c -- configuration code 2 conf.c -- configuration code
3 Copyright (C) 1998 Robert van der Meulen 3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
4 1998-2002 Ivo Timmermans <ivo@o2w.nl>
5 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
6 2000 Cris van Pelt <tribbel@arise.dhs.org>
7 2003 Marc Lehmann <pcg@goof.com>
8 4
5 This file is part of GVPE.
6
9 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
10 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
11 the Free Software Foundation; either version 2 of the License, or 9 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version. 10 (at your option) any later version.
13 11
14 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,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details. 15 GNU General Public License for more details.
18 16
19 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
20 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
21 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22*/ 20*/
23 21
24#include "config.h" 22#include "config.h"
25 23
31#include <netdb.h> 29#include <netdb.h>
32#include <sys/stat.h> 30#include <sys/stat.h>
33#include <sys/types.h> 31#include <sys/types.h>
34#include <unistd.h> 32#include <unistd.h>
35 33
36#include <netinet/in.h> 34#include "netcompat.h"
37 35
38#include <openssl/err.h> 36#include <openssl/err.h>
39#include <openssl/pem.h> 37#include <openssl/pem.h>
40#include <openssl/rsa.h> 38#include <openssl/rsa.h>
41#include <openssl/rand.h> 39#include <openssl/rand.h>
42 40#include <openssl/bn.h>
43#include "gettext.h"
44 41
45#include "conf.h" 42#include "conf.h"
46#include "slog.h" 43#include "slog.h"
47#include "util.h" 44#include "util.h"
48 45
49char *confbase; 46char *confbase;
50char *thisnode; 47char *thisnode;
51char *identname; 48char *identname;
52char *pidfilename;
53 49
54struct configuration conf; 50struct configuration conf;
55 51
56u8 best_protocol (u8 protset) 52u8 best_protocol (u8 protset)
57{ 53{
58 if (protset & PROT_IPv4 ) return PROT_IPv4; 54 if (protset & PROT_IPv4 ) return PROT_IPv4;
55 if (protset & PROT_ICMPv4) return PROT_ICMPv4;
59 if (protset & PROT_UDPv4) return PROT_UDPv4; 56 if (protset & PROT_UDPv4 ) return PROT_UDPv4;
60 if (protset & PROT_TCPv4) return PROT_TCPv4; 57 if (protset & PROT_TCPv4 ) return PROT_TCPv4;
58 if (protset & PROT_DNSv4 ) return PROT_DNSv4;
61 59
62 return 0; 60 return 0;
63} 61}
64 62
65const char *strprotocol (u8 protocol) 63const char *strprotocol (u8 protocol)
66{ 64{
67 if (protocol & PROT_IPv4 ) return "rawip"; 65 if (protocol & PROT_IPv4 ) return "rawip";
66 if (protocol & PROT_ICMPv4) return "icmp";
68 if (protocol & PROT_UDPv4) return "udp"; 67 if (protocol & PROT_UDPv4 ) return "udp";
68 if (protocol & PROT_TCPv4 ) return "tcp";
69 if (protocol & PROT_DNSv4 ) return "dns";
69 70
70 return "<unknown>"; 71 return "<unknown>";
71}
72
73configuration::configuration ()
74{
75 init ();
76}
77
78configuration::~configuration ()
79{
80 cleanup ();
81}
82
83void configuration::init ()
84{
85 memset (this, 0, sizeof (*this));
86
87 rekey = DEFAULT_REKEY;
88 keepalive = DEFAULT_KEEPALIVE;
89 llevel = L_INFO;
90 ip_proto = IPPROTO_GRE;
91
92 default_node.udp_port = DEFAULT_UDPPORT;
93 default_node.tcp_port = DEFAULT_UDPPORT;
94 default_node.connectmode = conf_node::C_ALWAYS;
95 default_node.compress = true;
96 default_node.protocols = PROT_UDPv4;
97}
98
99void configuration::cleanup()
100{
101 if (rsa_key)
102 RSA_free (rsa_key);
103
104 free (ifname);
105
106 rsa_key = 0;
107 ifname = 0;
108}
109
110void
111configuration::clear_config ()
112{
113 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
114 delete *i;
115
116 nodes.clear ();
117
118 cleanup ();
119 init ();
120}
121
122#define parse_bool(target,name,trueval,falseval) \
123 if (!strcmp (val, "yes")) target = trueval; \
124 else if (!strcmp (val, "no")) target = falseval; \
125 else if (!strcmp (val, "true")) target = trueval; \
126 else if (!strcmp (val, "false")) target = falseval; \
127 else if (!strcmp (val, "on")) target = trueval; \
128 else if (!strcmp (val, "off")) target = falseval; \
129 else \
130 slog (L_WARN, \
131 _("illegal value for '%s', only 'yes|true|on' or 'no|false|off' allowed, at '%s' line %d"), \
132 name, var, fname, lineno);
133
134void configuration::read_config (bool need_keys)
135{
136 char *fname;
137 FILE *f;
138
139 clear_config ();
140
141 asprintf (&fname, "%s/vped.conf", confbase);
142 f = fopen (fname, "r");
143
144 if (f)
145 {
146 char line[16384];
147 int lineno = 0;
148 char *var, *val;
149 conf_node *node = &default_node;
150
151 while (fgets (line, sizeof (line), f))
152 {
153 lineno++;
154
155 {
156 char *end = line + strlen (line);
157
158 while (*end < ' ' && end >= line)
159 end--;
160
161 *++end = 0;
162 }
163
164 char *tok = line;
165
166retry:
167 var = strtok (tok, "\t =");
168 tok = 0;
169
170 if (!var || !var[0])
171 continue; /* no tokens on this line */
172
173 if (var[0] == '#')
174 continue; /* comment: ignore */
175
176 val = strtok (NULL, "\t\n\r =");
177
178 if (!val || val[0] == '#')
179 {
180 slog (L_WARN,
181 _("no value for variable `%s', at '%s' line %d"),
182 var, fname, lineno);
183 break;
184 }
185
186 if (!strcmp (var, "on"))
187 {
188 if (!::thisnode
189 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
190 || !strcmp (val, ::thisnode))
191 goto retry;
192
193 continue;
194 }
195
196 // truly global
197 if (!strcmp (var, "loglevel"))
198 {
199 loglevel l = string_to_loglevel (val);
200
201 if (l != L_NONE)
202 llevel = l;
203 else
204 slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
205 }
206 else if (!strcmp (var, "ip-proto"))
207 ip_proto = atoi (val);
208
209 // per config
210 else if (!strcmp (var, "node"))
211 {
212 default_node.id++;
213
214 node = new conf_node (default_node);
215
216 nodes.push_back (node);
217
218 node->nodename = strdup (val);
219
220 {
221 char *fname;
222 FILE *f;
223
224 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
225
226 f = fopen (fname, "r");
227 if (f)
228 {
229 node->rsa_key = RSA_new ();
230
231 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
232 {
233 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
234 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
235 exit (1);
236 }
237
238 RSA_blinding_on (node->rsa_key, 0);
239
240 fclose (f);
241 }
242 else
243 {
244 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
245
246 if (need_keys)
247 exit (1);
248 }
249
250 free (fname);
251 }
252
253 if (!::thisnode || !strcmp (node->nodename, ::thisnode))
254 thisnode = node;
255 }
256 else if (!strcmp (var, "private-key"))
257 prikeyfile = strdup (val);
258 else if (!strcmp (var, "ifpersist"))
259 {
260 parse_bool (ifpersist, "ifpersist", true, false);
261 }
262 else if (!strcmp (var, "ifname"))
263 ifname = strdup (val);
264 else if (!strcmp (var, "rekey"))
265 rekey = atoi (val);
266 else if (!strcmp (var, "keepalive"))
267 keepalive = atoi (val);
268 else if (!strcmp (var, "mtu"))
269 mtu = atoi (val);
270 else if (!strcmp (var, "if-up"))
271 script_if_up = strdup (val);
272 else if (!strcmp (var, "node-up"))
273 script_node_up = strdup (val);
274 else if (!strcmp (var, "node-down"))
275 script_node_down = strdup (val);
276
277 /* node-specific, non-defaultable */
278 else if (node != &default_node && !strcmp (var, "hostname"))
279 {
280 free (node->hostname);
281 node->hostname = strdup (val);
282 }
283
284 /* node-specific, defaultable */
285 else if (!strcmp (var, "udp-port"))
286 node->udp_port = atoi (val);
287 else if (!strcmp (var, "tcp-port"))
288 node->tcp_port = atoi (val);
289 else if (!strcmp (var, "router-priority"))
290 node->routerprio = atoi (val);
291 else if (!strcmp (var, "connect"))
292 {
293 if (!strcmp (val, "ondemand"))
294 node->connectmode = conf_node::C_ONDEMAND;
295 else if (!strcmp (val, "never"))
296 node->connectmode = conf_node::C_NEVER;
297 else if (!strcmp (val, "always"))
298 node->connectmode = conf_node::C_ALWAYS;
299 else if (!strcmp (val, "disabled"))
300 node->connectmode = conf_node::C_DISABLED;
301 else
302 slog (L_WARN,
303 _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
304 var, fname, lineno);
305 }
306 else if (!strcmp (var, "inherit-tos"))
307 {
308 parse_bool (node->inherit_tos, "inherit-tos", true, false);
309 }
310 else if (!strcmp (var, "compress"))
311 {
312 parse_bool (node->compress, "compress", true, false);
313 }
314 // all these bool options really really cost a lot of executable size!
315 else if (!strcmp (var, "enable-tcp"))
316 {
317 u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v;
318 }
319 else if (!strcmp (var, "enable-udp"))
320 {
321 u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v;
322 }
323 else if (!strcmp (var, "enable-rawip"))
324 {
325 u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v;
326 }
327
328 // unknown or misplaced
329 else
330 {
331 slog (L_WARN,
332 _("unknown or misplaced variable `%s', at '%s' line %d"),
333 var, fname, lineno);
334 }
335 }
336
337 fclose (f);
338 }
339 else
340 {
341 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
342 exit (1);
343 }
344
345 free (fname);
346
347 fname = config_filename (prikeyfile, "hostkey");
348
349 f = fopen (fname, "r");
350 if (f)
351 {
352 rsa_key = RSA_new ();
353
354 if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
355 {
356 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
357 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
358 exit (1);
359 }
360
361 RSA_blinding_on (rsa_key, 0);
362
363 fclose (f);
364 }
365 else
366 {
367 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
368
369 if (need_keys)
370 exit (1);
371 }
372
373 free (fname);
374}
375
376char *configuration::config_filename (const char *name, const char *dflt)
377{
378 char *fname;
379
380 asprintf (&fname, name ? name : dflt, ::thisnode);
381
382 if (!ABSOLUTE_PATH (fname))
383 {
384 char *rname = fname;
385 asprintf (&fname, "%s/%s", confbase, rname);
386 free (rname);
387 }
388
389 return fname;
390}
391
392void
393configuration::print ()
394{
395 printf (_("\nConfiguration\n\n"));
396 printf (_("# of nodes: %d\n"), nodes.size ());
397 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
398 printf (_("MTU: %d\n"), mtu);
399 printf (_("rekeying interval: %d\n"), rekey);
400 printf (_("keepalive interval: %d\n"), keepalive);
401 printf (_("interface: %s\n"), ifname);
402 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
403 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1);
404 printf ("\n");
405
406 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
407 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
408
409 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
410 (*i)->print ();
411
412 printf ("\n");
413} 72}
414 73
415void 74void
416conf_node::print () 75conf_node::print ()
417{ 76{
427 hostname ? ":" : "", 86 hostname ? ":" : "",
428 hostname ? udp_port : 0 87 hostname ? udp_port : 0
429 ); 88 );
430} 89}
431 90
91conf_node::~conf_node ()
92{
93#if 0
94 // does not work, because string pointers etc. are shared
95 // is not called, however
96 if (rsa_key)
97 RSA_free (rsa_key);
98
99 free (nodename);
100 free (hostname);
101 free (if_up_data);
102#if ENABLE_DNS
103 free (domain);
104 free (dns_hostname);
105#endif
106#endif
107}
108
109void configuration::init ()
110{
111 memset (this, 0, sizeof (*this));
112
113 mtu = DEFAULT_MTU;
114 rekey = DEFAULT_REKEY;
115 keepalive = DEFAULT_KEEPALIVE;
116 llevel = L_INFO;
117 ip_proto = IPPROTO_GRE;
118#if ENABLE_ICMP
119 icmp_type = ICMP_ECHOREPLY;
120#endif
121
122 default_node.udp_port = DEFAULT_UDPPORT;
123 default_node.tcp_port = DEFAULT_UDPPORT; // ehrm
124 default_node.connectmode = conf_node::C_ALWAYS;
125 default_node.compress = true;
126 default_node.protocols = 0;
127 default_node.max_retry = DEFAULT_MAX_RETRY;
128 default_node.if_up_data = strdup ("");
129
130#if ENABLE_DNS
131 default_node.dns_port = 0; // default is 0 == client
132
133 dns_forw_host = strdup ("127.0.0.1");
134 dns_forw_port = 53;
135 dns_timeout_factor = DEFAULT_DNS_TIMEOUT_FACTOR;
136 dns_send_interval = DEFAULT_DNS_SEND_INTERVAL;
137 dns_overlap_factor = DEFAULT_DNS_OVERLAP_FACTOR;
138 dns_max_outstanding = DEFAULT_DNS_MAX_OUTSTANDING;
139#endif
140
141 conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
142}
143
144void configuration::cleanup()
145{
146 if (rsa_key)
147 RSA_free (rsa_key);
148
149 rsa_key = 0;
150
151 free (pidfilename); pidfilename = 0;
152 free (ifname); ifname = 0;
153#if ENABLE_HTTP_PROXY
154 free (proxy_host); proxy_host = 0;
155 free (proxy_auth); proxy_auth = 0;
156#endif
157#if ENABLE_DNS
158 free (dns_forw_host); dns_forw_host = 0;
159#endif
160}
161
162void
163configuration::clear ()
164{
165 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
166 delete *i;
167
168 nodes.clear ();
169
170 cleanup ();
171 init ();
172}
173
174#define parse_bool(target,name,trueval,falseval) do { \
175 if (!strcmp (val, "yes")) target = trueval; \
176 else if (!strcmp (val, "no")) target = falseval; \
177 else if (!strcmp (val, "true")) target = trueval; \
178 else if (!strcmp (val, "false")) target = falseval; \
179 else if (!strcmp (val, "on")) target = trueval; \
180 else if (!strcmp (val, "off")) target = falseval; \
181 else \
182 return _("illegal boolean value, only 'yes|true|on' or 'no|false|off' allowed. (ignored)"); \
183} while (0)
184
185const char *
186configuration_parser::parse_line (char *line)
187{
188 {
189 char *end = line + strlen (line);
190
191 while (*end < ' ' && end >= line)
192 end--;
193
194 *++end = 0;
195 }
196
197 char *tok = line;
198 const char *var = strtok (tok, "\t =");
199 tok = 0;
200
201 if (!var || !var[0])
202 return 0; /* no tokens on this line */
203
204 if (var[0] == '#')
205 return 0; /* comment: ignore */
206
207 char *val = strtok (NULL, "\t\n\r =");
208
209 if (!val || val[0] == '#')
210 return _("no value given for variable. (ignored)");
211
212 if (!strcmp (var, "on"))
213 {
214 if (!::thisnode
215 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
216 || !strcmp (val, ::thisnode))
217 return parse_line (strtok (NULL, "\n\r"));
218 else
219 return 0;
220 }
221
222 // truly global
223 if (!strcmp (var, "loglevel"))
224 {
225 loglevel l = string_to_loglevel (val);
226
227 if (l == L_NONE)
228 return _("unknown loglevel. (skipping)");
229 }
230 else if (!strcmp (var, "ip-proto"))
231 conf.ip_proto = atoi (val);
232 else if (!strcmp (var, "icmp-type"))
233 {
234#if ENABLE_ICMP
235 conf.icmp_type = atoi (val);
236#endif
237 }
238
239 // per config
240 else if (!strcmp (var, "node"))
241 {
242 parse_argv ();
243
244 conf.default_node.id++;
245 node = new conf_node (conf.default_node);
246 conf.nodes.push_back (node);
247 node->nodename = strdup (val);
248
249 {
250 char *fname;
251 FILE *f;
252
253 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
254
255 f = fopen (fname, "r");
256 if (f)
257 {
258 node->rsa_key = RSA_new ();
259
260 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
261 {
262 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
263 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
264 exit (EXIT_FAILURE);
265 }
266
267 require (RSA_blinding_on (node->rsa_key, 0));
268
269 fclose (f);
270 }
271 else
272 {
273 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
274
275 if (need_keys)
276 exit (EXIT_FAILURE);
277 }
278
279 free (fname);
280 }
281
282 if (::thisnode && !strcmp (node->nodename, ::thisnode))
283 conf.thisnode = node;
284 }
285 else if (!strcmp (var, "private-key"))
286 free (conf.prikeyfile), conf.prikeyfile = strdup (val);
287 else if (!strcmp (var, "ifpersist"))
288 parse_bool (conf.ifpersist, "ifpersist", true, false);
289 else if (!strcmp (var, "ifname"))
290 free (conf.ifname), conf.ifname = strdup (val);
291 else if (!strcmp (var, "rekey"))
292 conf.rekey = atoi (val);
293 else if (!strcmp (var, "keepalive"))
294 conf.keepalive = atoi (val);
295 else if (!strcmp (var, "mtu"))
296 conf.mtu = atoi (val);
297 else if (!strcmp (var, "if-up"))
298 free (conf.script_if_up), conf.script_if_up = strdup (val);
299 else if (!strcmp (var, "node-up"))
300 free (conf.script_node_up), conf.script_node_up = strdup (val);
301 else if (!strcmp (var, "node-down"))
302 free (conf.script_node_down), conf.script_node_down = strdup (val);
303 else if (!strcmp (var, "pid-file"))
304 free (conf.pidfilename), conf.pidfilename = strdup (val);
305 else if (!strcmp (var, "dns-forw-host"))
306 {
307#if ENABLE_DNS
308 free (conf.dns_forw_host), conf.dns_forw_host = strdup (val);
309#endif
310 }
311 else if (!strcmp (var, "dns-forw-port"))
312 {
313#if ENABLE_DNS
314 conf.dns_forw_port = atoi (val);
315#endif
316 }
317 else if (!strcmp (var, "dns-timeout-factor"))
318 {
319#if ENABLE_DNS
320 conf.dns_timeout_factor = atof (val);
321#endif
322 }
323 else if (!strcmp (var, "dns-send-interval"))
324 {
325#if ENABLE_DNS
326 conf.dns_send_interval = atoi (val);
327#endif
328 }
329 else if (!strcmp (var, "dns-overlap-factor"))
330 {
331#if ENABLE_DNS
332 conf.dns_overlap_factor = atof (val);
333#endif
334 }
335 else if (!strcmp (var, "dns-max-outstanding"))
336 {
337#if ENABLE_DNS
338 conf.dns_max_outstanding = atoi (val);
339#endif
340 }
341 else if (!strcmp (var, "http-proxy-host"))
342 {
343#if ENABLE_HTTP_PROXY
344 free (conf.proxy_host), conf.proxy_host = strdup (val);
345#endif
346 }
347 else if (!strcmp (var, "http-proxy-port"))
348 {
349#if ENABLE_HTTP_PROXY
350 conf.proxy_port = atoi (val);
351#endif
352 }
353 else if (!strcmp (var, "http-proxy-auth"))
354 {
355#if ENABLE_HTTP_PROXY
356 conf.proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val));
357#endif
358 }
359
360 /* node-specific, non-defaultable */
361 else if (node != &conf.default_node && !strcmp (var, "hostname"))
362 free (node->hostname), node->hostname = strdup (val);
363
364 /* node-specific, defaultable */
365 else if (!strcmp (var, "udp-port"))
366 node->udp_port = atoi (val);
367 else if (!strcmp (var, "tcp-port"))
368 node->tcp_port = atoi (val);
369 else if (!strcmp (var, "dns-hostname"))
370 {
371#if ENABLE_DNS
372 free (node->dns_hostname), node->dns_hostname = strdup (val);
373#endif
374 }
375 else if (!strcmp (var, "dns-port"))
376 {
377#if ENABLE_DNS
378 node->dns_port = atoi (val);
379#endif
380 }
381 else if (!strcmp (var, "dns-domain"))
382 {
383#if ENABLE_DNS
384 free (node->domain), node->domain = strdup (val);
385#endif
386 }
387 else if (!strcmp (var, "if-up-data"))
388 free (node->if_up_data), node->if_up_data = strdup (val);
389 else if (!strcmp (var, "router-priority"))
390 node->routerprio = atoi (val);
391 else if (!strcmp (var, "max-retry"))
392 node->max_retry = atoi (val);
393 else if (!strcmp (var, "connect"))
394 {
395 if (!strcmp (val, "ondemand"))
396 node->connectmode = conf_node::C_ONDEMAND;
397 else if (!strcmp (val, "never"))
398 node->connectmode = conf_node::C_NEVER;
399 else if (!strcmp (val, "always"))
400 node->connectmode = conf_node::C_ALWAYS;
401 else if (!strcmp (val, "disabled"))
402 node->connectmode = conf_node::C_DISABLED;
403 else
404 return _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled'. (ignored)");
405 }
406 else if (!strcmp (var, "inherit-tos"))
407 parse_bool (node->inherit_tos, "inherit-tos", true, false);
408 else if (!strcmp (var, "compress"))
409 parse_bool (node->compress, "compress", true, false);
410 // all these bool options really really cost a lot of executable size!
411 else if (!strcmp (var, "enable-tcp"))
412 {
413#if ENABLE_TCP
414 u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v;
415#endif
416 }
417 else if (!strcmp (var, "enable-icmp"))
418 {
419#if ENABLE_ICMP
420 u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v;
421#endif
422 }
423 else if (!strcmp (var, "enable-dns"))
424 {
425#if ENABLE_DNS
426 u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) | v;
427#endif
428 }
429 else if (!strcmp (var, "enable-udp"))
430 {
431 u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v;
432 }
433 else if (!strcmp (var, "enable-rawip"))
434 {
435 u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v;
436 }
437
438 // unknown or misplaced
439 else
440 return _("unknown configuration directive. (ignored)");
441
442 return 0;
443}
444
445void configuration_parser::parse_argv ()
446{
447 for (int i = 0; i < argc; ++i)
448 {
449 char *v = argv [i];
450
451 if (!*v)
452 continue;
453
454 char *enode = v;
455
456 while (*enode != '.' && *enode > ' ' && *enode != '=' && *enode)
457 enode++;
458
459 if (*enode != '.')
460 enode = 0;
461
462 char *wnode = node == &conf.default_node
463 ? 0
464 : node->nodename;
465
466 if ((!wnode && !enode)
467 || (wnode && enode && !strncmp (wnode, v, enode - v)))
468 {
469 const char *warn = parse_line (enode ? enode + 1 : v);
470
471 if (warn)
472 slog (L_WARN, _("%s, while parsing command line option '%s'."), warn, v);
473
474 *v = 0;
475 }
476 }
477}
478
479configuration_parser::configuration_parser (configuration &conf,
480 bool need_keys,
481 int argc,
482 char **argv)
483: conf (conf),need_keys (need_keys), argc (argc), argv (argv)
484{
485 char *fname;
486 FILE *f;
487
488 conf.clear ();
489
490 asprintf (&fname, "%s/gvpe.conf", confbase);
491 f = fopen (fname, "r");
492
493 if (f)
494 {
495 char line[16384];
496 int lineno = 0;
497 node = &conf.default_node;
498
499 while (fgets (line, sizeof (line), f))
500 {
501 lineno++;
502
503 const char *warn = parse_line (line);
504
505 if (warn)
506 slog (L_WARN, _("%s, at '%s', line %d."), warn, fname, lineno);
507 }
508
509 fclose (f);
510
511 parse_argv ();
512 }
513 else
514 {
515 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
516 exit (EXIT_FAILURE);
517 }
518
519 free (fname);
520
521 fname = conf.config_filename (conf.prikeyfile, "hostkey");
522
523 f = fopen (fname, "r");
524 if (f)
525 {
526 conf.rsa_key = RSA_new ();
527
528 if (!PEM_read_RSAPrivateKey (f, &conf.rsa_key, NULL, NULL))
529 {
530 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
531 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
532 exit (EXIT_FAILURE);
533 }
534
535 require (RSA_blinding_on (conf.rsa_key, 0));
536
537 fclose (f);
538 }
539 else
540 {
541 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
542
543 if (need_keys)
544 exit (EXIT_FAILURE);
545 }
546
547 if (need_keys && ::thisnode
548 && conf.rsa_key && conf.thisnode && conf.thisnode->rsa_key)
549 if (BN_cmp (conf.rsa_key->n, conf.thisnode->rsa_key->n) != 0
550 || BN_cmp (conf.rsa_key->e, conf.thisnode->rsa_key->e) != 0)
551 {
552 slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
553 exit (EXIT_FAILURE);
554 }
555
556 free (fname);
557}
558
559char *configuration::config_filename (const char *name, const char *dflt)
560{
561 char *fname;
562
563 asprintf (&fname, name ? name : dflt, ::thisnode);
564
565 if (!ABSOLUTE_PATH (fname))
566 {
567 char *rname = fname;
568 asprintf (&fname, "%s/%s", confbase, rname);
569 free (rname);
570 }
571
572 return fname;
573}
574
575void
576configuration::print ()
577{
578 printf (_("\nConfiguration\n\n"));
579 printf (_("# of nodes: %d\n"), nodes.size ());
580 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
581 printf (_("MTU: %d\n"), mtu);
582 printf (_("rekeying interval: %d\n"), rekey);
583 printf (_("keepalive interval: %d\n"), keepalive);
584 printf (_("interface: %s\n"), ifname);
585 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
586 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
587 printf ("\n");
588
589 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
590 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
591
592 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
593 (*i)->print ();
594
595 printf ("\n");
596}
597
598configuration::configuration ()
599{
600 asprintf (&confbase, "%s/gvpe", CONFDIR);
601
602 init ();
603}
604
605configuration::~configuration ()
606{
607 cleanup ();
608}
609
610

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