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Comparing gvpe/src/conf.C (file contents):
Revision 1.2 by pcg, Thu Mar 6 18:43:07 2003 UTC vs.
Revision 1.43 by pcg, Thu Aug 7 16:34:21 2008 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. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22*/ 20*/
23 21
24#include "config.h" 22#include "config.h"
25 23
26#include <cstdio> 24#include <cstdio>
… …
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 return 0;
60{
61 cleanup ();
62} 61}
63 62
64void configuration::init () 63const char *strprotocol (u8 protocol)
65{ 64{
66 memset (this, 0, sizeof (*this)); 65 if (protocol & PROT_IPv4 ) return "rawip";
66 if (protocol & PROT_ICMPv4) return "icmp";
67 if (protocol & PROT_UDPv4 ) return "udp";
68 if (protocol & PROT_TCPv4 ) return "tcp";
69 if (protocol & PROT_DNSv4 ) return "dns";
67 70
68 rekey = DEFAULT_REKEY; 71 return "<unknown>";
69 keepalive = DEFAULT_KEEPALIVE;
70 llevel = L_INFO;
71
72 default_node.port = DEFAULT_PORT;
73 default_node.connectmode = conf_node::C_ALWAYS;
74 default_node.compress = true;
75} 72}
76 73
77void configuration::cleanup() 74static bool
75match_list (const vector<const char *> &list, const char *str)
78{ 76{
79 if (rsa_key) 77 for (vector<const char *>::const_iterator i = list.end (); i-- > list.begin (); )
80 RSA_free (rsa_key); 78 if ((*i)[0] == '*' && !(*i)[1])
79 return true;
80 else if (!strcmp (*i, str))
81 return true;
81 82
82 free (ifname);
83
84 rsa_key = 0;
85 ifname = 0;
86}
87
88void
89configuration::clear_config ()
90{
91 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
92 delete *i;
93
94 nodes.clear ();
95
96 cleanup ();
97 init ();
98}
99
100void configuration::read_config (bool need_keys)
101{
102 char *fname;
103 FILE *f;
104
105 clear_config ();
106
107 asprintf (&fname, "%s/vped.conf", confbase);
108 f = fopen (fname, "r");
109
110 if (f)
111 {
112 char line[16384];
113 int lineno = 0;
114 char *var, *val;
115 conf_node *node = &default_node;
116
117 while (fgets (line, sizeof (line), f))
118 {
119 lineno++;
120
121 {
122 char *end = line + strlen (line);
123
124 while (*end < ' ' && end >= line)
125 end--;
126
127 *++end = 0;
128 }
129
130 char *tok = line;
131
132retry:
133 var = strtok (tok, "\t =");
134 tok = 0;
135
136 if (!var || !var[0])
137 continue; /* no tokens on this line */
138
139 if (var[0] == '#')
140 continue; /* comment: ignore */
141
142 val = strtok (NULL, "\t\n\r =");
143
144 if (!val || val[0] == '#')
145 {
146 slog (L_WARN,
147 _("no value for variable `%s', at '%s' line %d"),
148 var, fname, lineno);
149 break;
150 }
151
152 if (!strcmp (var, "on"))
153 {
154 if (!::thisnode
155 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
156 || !strcmp (val, ::thisnode))
157 goto retry;
158
159 continue;
160 }
161
162 // truly global
163 if (!strcmp (var, "loglevel"))
164 {
165 loglevel l = string_to_loglevel (val);
166
167 if (l != L_NONE)
168 llevel = l;
169 else
170 slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
171 }
172
173 // per config
174 else if (!strcmp (var, "node"))
175 {
176 default_node.id++;
177
178 node = new conf_node (default_node);
179
180 nodes.push_back (node);
181
182 node->nodename = strdup (val);
183
184 {
185 char *fname;
186 FILE *f;
187
188 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
189
190 f = fopen (fname, "r");
191 if (f)
192 {
193 node->rsa_key = RSA_new ();
194
195 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
196 {
197 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
198 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
199 exit (1);
200 }
201
202 RSA_blinding_on (node->rsa_key, 0);
203
204 fclose (f);
205 }
206 else
207 {
208 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
209
210 if (need_keys)
211 exit (1);
212 }
213
214 free (fname);
215 }
216
217 if (!::thisnode || !strcmp (node->nodename, ::thisnode))
218 thisnode = node;
219 }
220 else if (!strcmp (var, "private-key"))
221 prikeyfile = strdup (val);
222 else if (!strcmp (var, "ifpersist"))
223 {
224 if (!strcmp (val, "yes"))
225 ifpersist = true;
226 else if (!strcmp (val, "no"))
227 ifpersist = false;
228 else
229 slog (L_WARN,
230 _("illegal value for 'ifpersist', only 'yes' or 'no' allowed, at '%s' line %d"),
231 var, fname, lineno);
232 }
233 else if (!strcmp (var, "ifname"))
234 ifname = strdup (val);
235 else if (!strcmp (var, "rekey"))
236 rekey = atoi (val);
237 else if (!strcmp (var, "keepalive"))
238 keepalive = atoi (val);
239 else if (!strcmp (var, "mtu"))
240 mtu = atoi (val);
241 else if (!strcmp (var, "if-up"))
242 script_if_up = strdup (val);
243 else if (!strcmp (var, "node-up"))
244 script_node_up = strdup (val);
245 else if (!strcmp (var, "node-down"))
246 script_node_down = strdup (val);
247
248 /* node-specific, non-defaultable */
249 else if (node != &default_node && !strcmp (var, "hostname"))
250 {
251 free (node->hostname);
252 node->hostname = strdup (val);
253 }
254
255 /* node-specific, defaultable */
256 else if (!strcmp (var, "port"))
257 node->port = atoi (val);
258 else if (!strcmp (var, "router-priority"))
259 node->routerprio = atoi (val);
260 else if (!strcmp (var, "connect"))
261 {
262 if (!strcmp (val, "ondemand"))
263 node->connectmode = conf_node::C_ONDEMAND;
264 else if (!strcmp (val, "never"))
265 node->connectmode = conf_node::C_NEVER;
266 else if (!strcmp (val, "always"))
267 node->connectmode = conf_node::C_ALWAYS;
268 else
269 slog (L_WARN,
270 _("illegal value for 'connectmode', use one of 'ondemand', 'never' or 'always', at '%s' line %d"),
271 var, fname, lineno);
272 }
273 else if (!strcmp (var, "compress"))
274 {
275 if (!strcmp (val, "yes"))
276 node->compress = true;
277 else if (!strcmp (val, "no"))
278 node->compress = false;
279 else
280 slog (L_WARN,
281 _("illegal value for 'compress', only 'yes' or 'no' allowed, at '%s' line %d"),
282 var, fname, lineno);
283 }
284
285 // unknown or misplaced
286 else
287 {
288 slog (L_WARN,
289 _("unknown or misplaced variable `%s', at '%s' line %d"),
290 var, fname, lineno);
291 }
292 }
293
294 fclose (f);
295 }
296 else
297 {
298 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
299 exit (1);
300 }
301
302 free (fname);
303
304 fname = config_filename (prikeyfile, "hostkey");
305
306 f = fopen (fname, "r");
307 if (f)
308 {
309 rsa_key = RSA_new ();
310
311 if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
312 {
313 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
314 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
315 exit (1);
316 }
317
318 RSA_blinding_on (rsa_key, 0);
319
320 fclose (f);
321 }
322 else
323 {
324 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
325
326 if (need_keys)
327 exit (1);
328 }
329
330 free (fname);
331}
332
333char *configuration::config_filename (const char *name, const char *dflt)
334{
335 char *fname;
336
337 asprintf (&fname, name ? name : dflt, ::thisnode);
338
339 if (!ABSOLUTE_PATH (fname))
340 {
341 char *rname = fname;
342 asprintf (&fname, "%s/%s", confbase, rname);
343 free (rname);
344 }
345
346 return fname; 83 return false;
347} 84}
348 85
349void 86bool
350configuration::print () 87conf_node::can_direct (struct conf_node *other)
351{ 88{
352 printf (_("\nConfiguration\n\n")); 89 if (match_list (allow_direct, other->nodename))
353 printf (_("# of nodes: %d\n"), nodes.size ()); 90 return true;
354 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
355 printf (_("MTU: %d\n"), mtu);
356 printf (_("rekeying interval: %d\n"), rekey);
357 printf (_("keepalive interval: %d\n"), keepalive);
358 printf (_("interface: %s\n"), ifname);
359 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
360 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1);
361 printf ("\n");
362 91
363 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", 92 if (match_list (deny_direct, other->nodename))
364 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); 93 return false;
365 94
366 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i) 95 return true;
367 (*i)->print ();
368
369 printf ("\n");
370} 96}
371 97
372void 98void
373conf_node::print () 99conf_node::print ()
374{ 100{
… …
380 connectmode == C_NEVER ? "never" : 106 connectmode == C_NEVER ? "never" :
381 connectmode == C_ALWAYS ? "always" : "", 107 connectmode == C_ALWAYS ? "always" : "",
382 nodename, 108 nodename,
383 hostname ? hostname : "", 109 hostname ? hostname : "",
384 hostname ? ":" : "", 110 hostname ? ":" : "",
385 hostname ? port : 0 111 hostname ? udp_port : 0
386 ); 112 );
387} 113}
388 114
115conf_node::~conf_node ()
116{
117#if 0
118 // does not work, because string pointers etc. are shared
119 // is not called, however
120 if (rsa_key)
121 RSA_free (rsa_key);
122
123 free (nodename);
124 free (hostname);
125 free (if_up_data);
126#if ENABLE_DNS
127 free (domain);
128 free (dns_hostname);
129#endif
130#endif
131}
132
133void configuration::init ()
134{
135 memset (this, 0, sizeof (*this));
136
137 mtu = DEFAULT_MTU;
138 rekey = DEFAULT_REKEY;
139 keepalive = DEFAULT_KEEPALIVE;
140 llevel = L_INFO;
141 ip_proto = IPPROTO_GRE;
142#if ENABLE_ICMP
143 icmp_type = ICMP_ECHOREPLY;
144#endif
145
146 default_node.udp_port = DEFAULT_UDPPORT;
147 default_node.tcp_port = DEFAULT_UDPPORT; // ehrm
148 default_node.connectmode = conf_node::C_ALWAYS;
149 default_node.compress = true;
150 default_node.protocols = 0;
151 default_node.max_retry = DEFAULT_MAX_RETRY;
152 default_node.max_ttl = DEFAULT_MAX_TTL;
153 default_node.max_queue = DEFAULT_MAX_QUEUE;
154 default_node.if_up_data = strdup ("");
155
156#if ENABLE_DNS
157 default_node.dns_port = 0; // default is 0 == client
158
159 dns_forw_host = strdup ("127.0.0.1");
160 dns_forw_port = 53;
161 dns_timeout_factor = DEFAULT_DNS_TIMEOUT_FACTOR;
162 dns_send_interval = DEFAULT_DNS_SEND_INTERVAL;
163 dns_overlap_factor = DEFAULT_DNS_OVERLAP_FACTOR;
164 dns_max_outstanding = DEFAULT_DNS_MAX_OUTSTANDING;
165#endif
166
167 conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
168}
169
170void configuration::cleanup()
171{
172 if (rsa_key)
173 RSA_free (rsa_key);
174
175 rsa_key = 0;
176
177 free (pidfilename); pidfilename = 0;
178 free (ifname); ifname = 0;
179#if ENABLE_HTTP_PROXY
180 free (proxy_host); proxy_host = 0;
181 free (proxy_auth); proxy_auth = 0;
182#endif
183#if ENABLE_DNS
184 free (dns_forw_host); dns_forw_host = 0;
185#endif
186}
187
188void
189configuration::clear ()
190{
191 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
192 delete *i;
193
194 nodes.clear ();
195
196 cleanup ();
197 init ();
198}
199
200#define parse_bool(target,name,trueval,falseval) do { \
201 if (!strcmp (val, "yes")) target = trueval; \
202 else if (!strcmp (val, "no")) target = falseval; \
203 else if (!strcmp (val, "true")) target = trueval; \
204 else if (!strcmp (val, "false")) target = falseval; \
205 else if (!strcmp (val, "on")) target = trueval; \
206 else if (!strcmp (val, "off")) target = falseval; \
207 else \
208 return _("illegal boolean value, only 'yes|true|on' or 'no|false|off' allowed. (ignored)"); \
209} while (0)
210
211const char *
212configuration_parser::parse_line (char *line)
213{
214 {
215 char *end = line + strlen (line);
216
217 while (*end < ' ' && end >= line)
218 end--;
219
220 *++end = 0;
221 }
222
223 char *tok = line;
224 const char *var = strtok (tok, "\t =");
225 tok = 0;
226
227 if (!var || !var[0])
228 return 0; /* no tokens on this line */
229
230 if (var[0] == '#')
231 return 0; /* comment: ignore */
232
233 char *val = strtok (NULL, "\t\n\r =");
234
235 if (!val || val[0] == '#')
236 return _("no value given for variable. (ignored)");
237
238 if (!strcmp (var, "on"))
239 {
240 if (!::thisnode
241 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
242 || !strcmp (val, ::thisnode))
243 return parse_line (strtok (NULL, "\n\r"));
244 else
245 return 0;
246 }
247
248 // truly global
249 if (!strcmp (var, "loglevel"))
250 {
251 loglevel l = string_to_loglevel (val);
252
253 if (l == L_NONE)
254 return _("unknown loglevel. (skipping)");
255 }
256 else if (!strcmp (var, "ip-proto"))
257 conf.ip_proto = atoi (val);
258 else if (!strcmp (var, "icmp-type"))
259 {
260#if ENABLE_ICMP
261 conf.icmp_type = atoi (val);
262#endif
263 }
264
265 // per config
266 else if (!strcmp (var, "node"))
267 {
268 parse_argv ();
269
270 conf.default_node.id++;
271 node = new conf_node (conf.default_node);
272 conf.nodes.push_back (node);
273 node->nodename = strdup (val);
274
275 {
276 char *fname;
277 FILE *f;
278
279 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
280
281 f = fopen (fname, "r");
282 if (f)
283 {
284 node->rsa_key = RSA_new ();
285
286 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
287 {
288 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
289 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
290 exit (EXIT_FAILURE);
291 }
292
293 require (RSA_blinding_on (node->rsa_key, 0));
294
295 fclose (f);
296 }
297 else
298 {
299 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
300
301 if (need_keys)
302 exit (EXIT_FAILURE);
303 }
304
305 free (fname);
306 }
307
308 if (::thisnode && !strcmp (node->nodename, ::thisnode))
309 conf.thisnode = node;
310 }
311 else if (!strcmp (var, "private-key"))
312 free (conf.prikeyfile), conf.prikeyfile = strdup (val);
313 else if (!strcmp (var, "ifpersist"))
314 parse_bool (conf.ifpersist, "ifpersist", true, false);
315 else if (!strcmp (var, "ifname"))
316 free (conf.ifname), conf.ifname = strdup (val);
317 else if (!strcmp (var, "rekey"))
318 conf.rekey = atoi (val);
319 else if (!strcmp (var, "keepalive"))
320 conf.keepalive = atoi (val);
321 else if (!strcmp (var, "mtu"))
322 conf.mtu = atoi (val);
323 else if (!strcmp (var, "if-up"))
324 free (conf.script_if_up), conf.script_if_up = strdup (val);
325 else if (!strcmp (var, "node-up"))
326 free (conf.script_node_up), conf.script_node_up = strdup (val);
327 else if (!strcmp (var, "node-down"))
328 free (conf.script_node_down), conf.script_node_down = strdup (val);
329 else if (!strcmp (var, "pid-file"))
330 free (conf.pidfilename), conf.pidfilename = strdup (val);
331 else if (!strcmp (var, "dns-forw-host"))
332 {
333#if ENABLE_DNS
334 free (conf.dns_forw_host), conf.dns_forw_host = strdup (val);
335#endif
336 }
337 else if (!strcmp (var, "dns-forw-port"))
338 {
339#if ENABLE_DNS
340 conf.dns_forw_port = atoi (val);
341#endif
342 }
343 else if (!strcmp (var, "dns-timeout-factor"))
344 {
345#if ENABLE_DNS
346 conf.dns_timeout_factor = atof (val);
347#endif
348 }
349 else if (!strcmp (var, "dns-send-interval"))
350 {
351#if ENABLE_DNS
352 conf.dns_send_interval = atoi (val);
353#endif
354 }
355 else if (!strcmp (var, "dns-overlap-factor"))
356 {
357#if ENABLE_DNS
358 conf.dns_overlap_factor = atof (val);
359#endif
360 }
361 else if (!strcmp (var, "dns-max-outstanding"))
362 {
363#if ENABLE_DNS
364 conf.dns_max_outstanding = atoi (val);
365#endif
366 }
367 else if (!strcmp (var, "http-proxy-host"))
368 {
369#if ENABLE_HTTP_PROXY
370 free (conf.proxy_host), conf.proxy_host = strdup (val);
371#endif
372 }
373 else if (!strcmp (var, "http-proxy-port"))
374 {
375#if ENABLE_HTTP_PROXY
376 conf.proxy_port = atoi (val);
377#endif
378 }
379 else if (!strcmp (var, "http-proxy-auth"))
380 {
381#if ENABLE_HTTP_PROXY
382 conf.proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val));
383#endif
384 }
385
386 /* node-specific, non-defaultable */
387 else if (node != &conf.default_node && !strcmp (var, "hostname"))
388 free (node->hostname), node->hostname = strdup (val);
389
390 /* node-specific, defaultable */
391 else if (!strcmp (var, "udp-port"))
392 node->udp_port = atoi (val);
393 else if (!strcmp (var, "tcp-port"))
394 node->tcp_port = atoi (val);
395 else if (!strcmp (var, "dns-hostname"))
396 {
397#if ENABLE_DNS
398 free (node->dns_hostname), node->dns_hostname = strdup (val);
399#endif
400 }
401 else if (!strcmp (var, "dns-port"))
402 {
403#if ENABLE_DNS
404 node->dns_port = atoi (val);
405#endif
406 }
407 else if (!strcmp (var, "dns-domain"))
408 {
409#if ENABLE_DNS
410 free (node->domain), node->domain = strdup (val);
411#endif
412 }
413 else if (!strcmp (var, "if-up-data"))
414 free (node->if_up_data), node->if_up_data = strdup (val);
415 else if (!strcmp (var, "router-priority"))
416 node->routerprio = atoi (val);
417 else if (!strcmp (var, "max-retry"))
418 node->max_retry = atoi (val);
419 else if (!strcmp (var, "connect"))
420 {
421 if (!strcmp (val, "ondemand"))
422 node->connectmode = conf_node::C_ONDEMAND;
423 else if (!strcmp (val, "never"))
424 node->connectmode = conf_node::C_NEVER;
425 else if (!strcmp (val, "always"))
426 node->connectmode = conf_node::C_ALWAYS;
427 else if (!strcmp (val, "disabled"))
428 node->connectmode = conf_node::C_DISABLED;
429 else
430 return _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled'. (ignored)");
431 }
432 else if (!strcmp (var, "inherit-tos"))
433 parse_bool (node->inherit_tos, "inherit-tos", true, false);
434 else if (!strcmp (var, "compress"))
435 parse_bool (node->compress, "compress", true, false);
436 // all these bool options really really cost a lot of executable size!
437 else if (!strcmp (var, "enable-tcp"))
438 {
439#if ENABLE_TCP
440 u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v;
441#endif
442 }
443 else if (!strcmp (var, "enable-icmp"))
444 {
445#if ENABLE_ICMP
446 u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v;
447#endif
448 }
449 else if (!strcmp (var, "enable-dns"))
450 {
451#if ENABLE_DNS
452 u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) | v;
453#endif
454 }
455 else if (!strcmp (var, "enable-udp"))
456 {
457 u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v;
458 }
459 else if (!strcmp (var, "enable-rawip"))
460 {
461 u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v;
462 }
463 else if (!strcmp (var, "allow-direct"))
464 node->allow_direct.push_back (strdup (val));
465 else if (!strcmp (var, "deny-direct"))
466 node->deny_direct.push_back (strdup (val));
467 else if (!strcmp (var, "max-ttl"))
468 node->max_ttl = atof (val);
469 else if (!strcmp (var, "max-queue"))
470 node->max_queue = atoi (val);
471
472 // unknown or misplaced
473 else
474 return _("unknown configuration directive. (ignored)");
475
476 return 0;
477}
478
479void configuration_parser::parse_argv ()
480{
481 for (int i = 0; i < argc; ++i)
482 {
483 char *v = argv [i];
484
485 if (!*v)
486 continue;
487
488 char *enode = v;
489
490 while (*enode != '.' && *enode > ' ' && *enode != '=' && *enode)
491 enode++;
492
493 if (*enode != '.')
494 enode = 0;
495
496 char *wnode = node == &conf.default_node
497 ? 0
498 : node->nodename;
499
500 if ((!wnode && !enode)
501 || (wnode && enode && !strncmp (wnode, v, enode - v)))
502 {
503 const char *warn = parse_line (enode ? enode + 1 : v);
504
505 if (warn)
506 slog (L_WARN, _("%s, while parsing command line option '%s'."), warn, v);
507
508 *v = 0;
509 }
510 }
511}
512
513configuration_parser::configuration_parser (configuration &conf,
514 bool need_keys,
515 int argc,
516 char **argv)
517: conf (conf),need_keys (need_keys), argc (argc), argv (argv)
518{
519 char *fname;
520 FILE *f;
521
522 conf.clear ();
523
524 asprintf (&fname, "%s/gvpe.conf", confbase);
525 f = fopen (fname, "r");
526
527 if (f)
528 {
529 char line[16384];
530 int lineno = 0;
531 node = &conf.default_node;
532
533 while (fgets (line, sizeof (line), f))
534 {
535 lineno++;
536
537 const char *warn = parse_line (line);
538
539 if (warn)
540 slog (L_WARN, _("%s, at '%s', line %d."), warn, fname, lineno);
541 }
542
543 fclose (f);
544
545 parse_argv ();
546 }
547 else
548 {
549 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
550 exit (EXIT_FAILURE);
551 }
552
553 free (fname);
554
555 fname = conf.config_filename (conf.prikeyfile, "hostkey");
556
557 f = fopen (fname, "r");
558 if (f)
559 {
560 conf.rsa_key = RSA_new ();
561
562 if (!PEM_read_RSAPrivateKey (f, &conf.rsa_key, NULL, NULL))
563 {
564 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
565 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
566 exit (EXIT_FAILURE);
567 }
568
569 require (RSA_blinding_on (conf.rsa_key, 0));
570
571 fclose (f);
572 }
573 else
574 {
575 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
576
577 if (need_keys)
578 exit (EXIT_FAILURE);
579 }
580
581 if (need_keys && ::thisnode
582 && conf.rsa_key && conf.thisnode && conf.thisnode->rsa_key)
583 if (BN_cmp (conf.rsa_key->n, conf.thisnode->rsa_key->n) != 0
584 || BN_cmp (conf.rsa_key->e, conf.thisnode->rsa_key->e) != 0)
585 {
586 slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
587 exit (EXIT_FAILURE);
588 }
589
590 free (fname);
591}
592
593char *configuration::config_filename (const char *name, const char *dflt)
594{
595 char *fname;
596
597 asprintf (&fname, name ? name : dflt, ::thisnode);
598
599 if (!ABSOLUTE_PATH (fname))
600 {
601 char *rname = fname;
602 asprintf (&fname, "%s/%s", confbase, rname);
603 free (rname);
604 }
605
606 return fname;
607}
608
609void
610configuration::print ()
611{
612 printf (_("\nConfiguration\n\n"));
613 printf (_("# of nodes: %d\n"), nodes.size ());
614 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
615 printf (_("MTU: %d\n"), mtu);
616 printf (_("rekeying interval: %d\n"), rekey);
617 printf (_("keepalive interval: %d\n"), keepalive);
618 printf (_("interface: %s\n"), ifname);
619 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
620 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
621 printf ("\n");
622
623 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
624 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
625
626 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
627 (*i)->print ();
628
629 printf ("\n");
630}
631
632configuration::configuration ()
633{
634 asprintf (&confbase, "%s/gvpe", CONFDIR);
635
636 init ();
637}
638
639configuration::~configuration ()
640{
641 cleanup ();
642}
643
644

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