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Comparing gvpe/src/conf.C (file contents):
Revision 1.1 by pcg, Sat Mar 1 15:53:03 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
34#include "netcompat.h"
35
36#include <openssl/err.h> 36#include <openssl/err.h>
37#include <openssl/pem.h> 37#include <openssl/pem.h>
38#include <openssl/rsa.h> 38#include <openssl/rsa.h>
39#include <openssl/rand.h> 39#include <openssl/rand.h>
40 40#include <openssl/bn.h>
41#include "gettext.h"
42 41
43#include "conf.h" 42#include "conf.h"
44#include "slog.h" 43#include "slog.h"
45#include "util.h" 44#include "util.h"
46 45
47char *confbase; 46char *confbase;
48char *thisnode; 47char *thisnode;
49char *identname; 48char *identname;
50char *pidfilename;
51 49
52struct configuration conf; 50struct configuration conf;
53 51
54configuration::configuration () 52u8 best_protocol (u8 protset)
55{ 53{
56 init (); 54 if (protset & PROT_IPv4 ) return PROT_IPv4;
57} 55 if (protset & PROT_ICMPv4) return PROT_ICMPv4;
56 if (protset & PROT_UDPv4 ) return PROT_UDPv4;
57 if (protset & PROT_TCPv4 ) return PROT_TCPv4;
58 if (protset & PROT_DNSv4 ) return PROT_DNSv4;
58 59
59configuration::~configuration ()
60{
61 cleanup ();
62}
63
64void configuration::init ()
65{
66 memset (this, 0, sizeof (*this));
67
68 rekey = DEFAULT_REKEY;
69 keepalive = DEFAULT_KEEPALIVE;
70
71 default_node.port = DEFAULT_PORT;
72 default_node.connectmode = conf_node::C_ALWAYS;
73 default_node.compress = true;
74}
75
76void configuration::cleanup()
77{
78 if (rsa_key)
79 RSA_free (rsa_key);
80
81 free (ifname);
82
83 rsa_key = 0;
84 ifname = 0;
85}
86
87void
88configuration::clear_config ()
89{
90 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
91 delete *i;
92
93 nodes.clear ();
94
95 cleanup ();
96 init ();
97}
98
99void configuration::read_config (bool need_keys)
100{
101 char *fname;
102 FILE *f;
103
104 clear_config ();
105
106 asprintf (&fname, "%s/vped.conf", confbase);
107 f = fopen (fname, "r");
108
109 if (f)
110 {
111 char line[16384];
112 int lineno = 0;
113 char *var, *val;
114 conf_node *node = &default_node;
115
116 while (fgets (line, sizeof (line), f))
117 {
118 lineno++;
119
120 {
121 char *end = line + strlen (line);
122
123 while (*end < ' ' && end >= line)
124 end--;
125
126 *++end = 0;
127 }
128
129 char *tok = line;
130
131retry:
132 var = strtok (tok, "\t =");
133 tok = 0;
134
135 if (!var || !var[0])
136 continue; /* no tokens on this line */
137
138 if (var[0] == '#')
139 continue; /* comment: ignore */
140
141 val = strtok (NULL, "\t\n\r =");
142
143 if (!val || val[0] == '#')
144 {
145 slog (L_WARN,
146 _("no value for variable `%s', at '%s' line %d"),
147 var, fname, lineno);
148 break;
149 }
150
151 if (!strcmp (var, "on"))
152 {
153 if (!::thisnode
154 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
155 || !strcmp (val, ::thisnode))
156 goto retry;
157
158 continue;
159 }
160
161 // truly global
162 if (!strcmp (var, "loglevel"))
163 {
164 loglevel l = string_to_loglevel (val);
165
166 if (l != L_NONE)
167 set_loglevel (l);
168 else
169 slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
170 }
171
172 // per config
173 else if (!strcmp (var, "node"))
174 {
175 default_node.id++;
176
177 node = new conf_node (default_node);
178
179 nodes.push_back (node);
180
181 node->nodename = strdup (val);
182
183 {
184 char *fname;
185 FILE *f;
186
187 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
188
189 f = fopen (fname, "r");
190 if (f)
191 {
192 node->rsa_key = RSA_new ();
193
194 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
195 {
196 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
197 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
198 exit (1);
199 }
200
201 RSA_blinding_on (node->rsa_key, 0);
202
203 fclose (f);
204 }
205 else
206 {
207 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
208
209 if (need_keys)
210 exit (1);
211 }
212
213 free (fname);
214 }
215
216 if (!::thisnode || !strcmp (node->nodename, ::thisnode))
217 thisnode = node;
218 }
219 else if (!strcmp (var, "private-key"))
220 prikeyfile = strdup (val);
221 else if (!strcmp (var, "ifpersist"))
222 {
223 if (!strcmp (val, "yes"))
224 ifpersist = true;
225 else if (!strcmp (val, "no"))
226 ifpersist = false;
227 else
228 slog (L_WARN,
229 _("illegal value for 'ifpersist', only 'yes' or 'no' allowed, at '%s' line %d"),
230 var, fname, lineno);
231 }
232 else if (!strcmp (var, "ifname"))
233 ifname = strdup (val);
234 else if (!strcmp (var, "rekey"))
235 rekey = atoi (val);
236 else if (!strcmp (var, "keepalive"))
237 keepalive = atoi (val);
238 else if (!strcmp (var, "mtu"))
239 mtu = atoi (val);
240 else if (!strcmp (var, "if-up"))
241 script_if_up = strdup (val);
242 else if (!strcmp (var, "node-up"))
243 script_node_up = strdup (val);
244 else if (!strcmp (var, "node-down"))
245 script_node_down = strdup (val);
246
247 /* node-specific, non-defaultable */
248 else if (node != &default_node && !strcmp (var, "hostname"))
249 {
250 free (node->hostname);
251 node->hostname = strdup (val);
252 }
253
254 /* node-specific, defaultable */
255 else if (!strcmp (var, "port"))
256 node->port = atoi (val);
257 else if (!strcmp (var, "router-priority"))
258 node->routerprio = atoi (val);
259 else if (!strcmp (var, "connect"))
260 {
261 if (!strcmp (val, "ondemand"))
262 node->connectmode = conf_node::C_ONDEMAND;
263 else if (!strcmp (val, "never"))
264 node->connectmode = conf_node::C_NEVER;
265 else if (!strcmp (val, "always"))
266 node->connectmode = conf_node::C_ALWAYS;
267 else
268 slog (L_WARN,
269 _("illegal value for 'connectmode', use one of 'ondemand', 'never' or 'always', at '%s' line %d"),
270 var, fname, lineno);
271 }
272 else if (!strcmp (var, "compress"))
273 {
274 if (!strcmp (val, "yes"))
275 node->compress = true;
276 else if (!strcmp (val, "no"))
277 node->compress = false;
278 else
279 slog (L_WARN,
280 _("illegal value for 'compress', only 'yes' or 'no' allowed, at '%s' line %d"),
281 var, fname, lineno);
282 }
283
284 // unknown or misplaced
285 else
286 {
287 slog (L_WARN,
288 _("unknown or misplaced variable `%s', at '%s' line %d"),
289 var, fname, lineno);
290 }
291 }
292
293 fclose (f);
294 }
295 else
296 {
297 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
298 exit (1);
299 }
300
301 free (fname);
302
303 fname = config_filename (prikeyfile, "hostkey");
304
305 f = fopen (fname, "r");
306 if (f)
307 {
308 rsa_key = RSA_new ();
309
310 if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
311 {
312 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
313 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
314 exit (1);
315 }
316
317 RSA_blinding_on (rsa_key, 0);
318
319 fclose (f);
320 }
321 else
322 {
323 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
324
325 if (need_keys)
326 exit (1);
327 }
328
329 free (fname);
330}
331
332char *configuration::config_filename (const char *name, const char *dflt)
333{
334 char *fname;
335
336 asprintf (&fname, name ? name : dflt, ::thisnode);
337
338 if (!ABSOLUTE_PATH (fname))
339 {
340 char *rname = fname;
341 asprintf (&fname, "%s/%s", confbase, rname);
342 free (rname);
343 }
344
345 return fname; 60 return 0;
346} 61}
347 62
348void 63const char *strprotocol (u8 protocol)
349configuration::print ()
350{ 64{
351 printf (_("\nConfiguration\n\n")); 65 if (protocol & PROT_IPv4 ) return "rawip";
352 printf (_("# of nodes: %d\n"), nodes.size ()); 66 if (protocol & PROT_ICMPv4) return "icmp";
353 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>"); 67 if (protocol & PROT_UDPv4 ) return "udp";
354 printf (_("MTU: %d\n"), mtu); 68 if (protocol & PROT_TCPv4 ) return "tcp";
355 printf (_("rekeying interval: %d\n"), rekey); 69 if (protocol & PROT_DNSv4 ) return "dns";
356 printf (_("keepalive interval: %d\n"), keepalive);
357 printf (_("interface: %s\n"), ifname);
358 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
359 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1);
360 printf ("\n");
361 70
362 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", 71 return "<unknown>";
363 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
364
365 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
366 (*i)->print ();
367
368 printf ("\n");
369} 72}
370 73
371void 74void
372conf_node::print () 75conf_node::print ()
373{ 76{
… …
379 connectmode == C_NEVER ? "never" : 82 connectmode == C_NEVER ? "never" :
380 connectmode == C_ALWAYS ? "always" : "", 83 connectmode == C_ALWAYS ? "always" : "",
381 nodename, 84 nodename,
382 hostname ? hostname : "", 85 hostname ? hostname : "",
383 hostname ? ":" : "", 86 hostname ? ":" : "",
384 hostname ? port : 0 87 hostname ? udp_port : 0
385 ); 88 );
386} 89}
387 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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