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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 1.44 by pcg, Thu Aug 7 17:54:26 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) 2003-2008 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 it
10 it under the terms of the GNU General Public License as published by 8 under the terms of the GNU General Public License as published by the
11 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
12 (at your option) any later version. 10 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, but
15 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 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 GNU General
17 GNU General Public License for more details. 15 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 along
20 along with this program; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
21 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19
20 Additional permission under GNU GPL version 3 section 7
21
22 If you modify this Program, or any covered work, by linking or
23 combining it with the OpenSSL project's OpenSSL library (or a modified
24 version of that library), containing parts covered by the terms of the
25 OpenSSL or SSLeay licenses, the licensors of this Program grant you
26 additional permission to convey the resulting work. Corresponding
27 Source for a non-source form of such a combination shall include the
28 source code for the parts of OpenSSL used as well as that of the
29 covered work.
22*/ 30*/
23 31
24#include "config.h" 32#include "config.h"
25 33
26#include <cstdio> 34#include <cstdio>
… …
31#include <netdb.h> 39#include <netdb.h>
32#include <sys/stat.h> 40#include <sys/stat.h>
33#include <sys/types.h> 41#include <sys/types.h>
34#include <unistd.h> 42#include <unistd.h>
35 43
36#include <netinet/in.h> 44#include "netcompat.h"
37 45
38#include <openssl/err.h> 46#include <openssl/err.h>
39#include <openssl/pem.h> 47#include <openssl/pem.h>
40#include <openssl/rsa.h> 48#include <openssl/rsa.h>
41#include <openssl/rand.h> 49#include <openssl/rand.h>
42 50#include <openssl/bn.h>
43#include "gettext.h"
44 51
45#include "conf.h" 52#include "conf.h"
46#include "slog.h" 53#include "slog.h"
47#include "util.h" 54#include "util.h"
48 55
49char *confbase; 56char *confbase;
50char *thisnode; 57char *thisnode;
51char *identname; 58char *identname;
52char *pidfilename;
53 59
54struct configuration conf; 60struct configuration conf;
55 61
56u8 best_protocol (u8 protset) 62u8 best_protocol (u8 protset)
57{ 63{
58 if (protset & PROT_IPv4 ) return PROT_IPv4; 64 if (protset & PROT_IPv4 ) return PROT_IPv4;
65 if (protset & PROT_ICMPv4) return PROT_ICMPv4;
59 if (protset & PROT_UDPv4) return PROT_UDPv4; 66 if (protset & PROT_UDPv4 ) return PROT_UDPv4;
60 if (protset & PROT_TCPv4) return PROT_TCPv4; 67 if (protset & PROT_TCPv4 ) return PROT_TCPv4;
68 if (protset & PROT_DNSv4 ) return PROT_DNSv4;
61 69
62 return 0; 70 return 0;
63} 71}
64 72
65const char *strprotocol (u8 protocol) 73const char *strprotocol (u8 protocol)
66{ 74{
67 if (protocol & PROT_IPv4 ) return "rawip"; 75 if (protocol & PROT_IPv4 ) return "rawip";
76 if (protocol & PROT_ICMPv4) return "icmp";
68 if (protocol & PROT_UDPv4) return "udp"; 77 if (protocol & PROT_UDPv4 ) return "udp";
78 if (protocol & PROT_TCPv4 ) return "tcp";
79 if (protocol & PROT_DNSv4 ) return "dns";
69 80
70 return "<unknown>"; 81 return "<unknown>";
71} 82}
72 83
73configuration::configuration () 84static bool
85match_list (const vector<const char *> &list, const char *str)
74{ 86{
75 init (); 87 for (vector<const char *>::const_iterator i = list.end (); i-- > list.begin (); )
76} 88 if ((*i)[0] == '*' && !(*i)[1])
89 return true;
90 else if (!strcmp (*i, str))
91 return true;
77 92
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; 93 return false;
390} 94}
391 95
392void 96bool
393configuration::print () 97conf_node::can_direct (struct conf_node *other)
394{ 98{
395 printf (_("\nConfiguration\n\n")); 99 if (match_list (allow_direct, other->nodename))
396 printf (_("# of nodes: %d\n"), nodes.size ()); 100 return true;
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");
405 101
406 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", 102 if (match_list (deny_direct, other->nodename))
407 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); 103 return false;
408 104
409 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i) 105 return true;
410 (*i)->print ();
411
412 printf ("\n");
413} 106}
414 107
415void 108void
416conf_node::print () 109conf_node::print ()
417{ 110{
… …
427 hostname ? ":" : "", 120 hostname ? ":" : "",
428 hostname ? udp_port : 0 121 hostname ? udp_port : 0
429 ); 122 );
430} 123}
431 124
125conf_node::~conf_node ()
126{
127#if 0
128 // does not work, because string pointers etc. are shared
129 // is not called, however
130 if (rsa_key)
131 RSA_free (rsa_key);
132
133 free (nodename);
134 free (hostname);
135 free (if_up_data);
136#if ENABLE_DNS
137 free (domain);
138 free (dns_hostname);
139#endif
140#endif
141}
142
143void configuration::init ()
144{
145 memset (this, 0, sizeof (*this));
146
147 mtu = DEFAULT_MTU;
148 rekey = DEFAULT_REKEY;
149 keepalive = DEFAULT_KEEPALIVE;
150 llevel = L_INFO;
151 ip_proto = IPPROTO_GRE;
152#if ENABLE_ICMP
153 icmp_type = ICMP_ECHOREPLY;
154#endif
155
156 default_node.udp_port = DEFAULT_UDPPORT;
157 default_node.tcp_port = DEFAULT_UDPPORT; // ehrm
158 default_node.connectmode = conf_node::C_ALWAYS;
159 default_node.compress = true;
160 default_node.protocols = 0;
161 default_node.max_retry = DEFAULT_MAX_RETRY;
162 default_node.max_ttl = DEFAULT_MAX_TTL;
163 default_node.max_queue = DEFAULT_MAX_QUEUE;
164 default_node.if_up_data = strdup ("");
165
166#if ENABLE_DNS
167 default_node.dns_port = 0; // default is 0 == client
168
169 dns_forw_host = strdup ("127.0.0.1");
170 dns_forw_port = 53;
171 dns_timeout_factor = DEFAULT_DNS_TIMEOUT_FACTOR;
172 dns_send_interval = DEFAULT_DNS_SEND_INTERVAL;
173 dns_overlap_factor = DEFAULT_DNS_OVERLAP_FACTOR;
174 dns_max_outstanding = DEFAULT_DNS_MAX_OUTSTANDING;
175#endif
176
177 conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
178}
179
180void configuration::cleanup()
181{
182 if (rsa_key)
183 RSA_free (rsa_key);
184
185 rsa_key = 0;
186
187 free (pidfilename); pidfilename = 0;
188 free (ifname); ifname = 0;
189#if ENABLE_HTTP_PROXY
190 free (proxy_host); proxy_host = 0;
191 free (proxy_auth); proxy_auth = 0;
192#endif
193#if ENABLE_DNS
194 free (dns_forw_host); dns_forw_host = 0;
195#endif
196}
197
198void
199configuration::clear ()
200{
201 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
202 delete *i;
203
204 nodes.clear ();
205
206 cleanup ();
207 init ();
208}
209
210#define parse_bool(target,name,trueval,falseval) do { \
211 if (!strcmp (val, "yes")) target = trueval; \
212 else if (!strcmp (val, "no")) target = falseval; \
213 else if (!strcmp (val, "true")) target = trueval; \
214 else if (!strcmp (val, "false")) target = falseval; \
215 else if (!strcmp (val, "on")) target = trueval; \
216 else if (!strcmp (val, "off")) target = falseval; \
217 else \
218 return _("illegal boolean value, only 'yes|true|on' or 'no|false|off' allowed. (ignored)"); \
219} while (0)
220
221const char *
222configuration_parser::parse_line (char *line)
223{
224 {
225 char *end = line + strlen (line);
226
227 while (*end < ' ' && end >= line)
228 end--;
229
230 *++end = 0;
231 }
232
233 char *tok = line;
234 const char *var = strtok (tok, "\t =");
235 tok = 0;
236
237 if (!var || !var[0])
238 return 0; /* no tokens on this line */
239
240 if (var[0] == '#')
241 return 0; /* comment: ignore */
242
243 char *val = strtok (NULL, "\t\n\r =");
244
245 if (!val || val[0] == '#')
246 return _("no value given for variable. (ignored)");
247
248 if (!strcmp (var, "on"))
249 {
250 if (!::thisnode
251 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
252 || !strcmp (val, ::thisnode))
253 return parse_line (strtok (NULL, "\n\r"));
254 else
255 return 0;
256 }
257
258 // truly global
259 if (!strcmp (var, "loglevel"))
260 {
261 loglevel l = string_to_loglevel (val);
262
263 if (l == L_NONE)
264 return _("unknown loglevel. (skipping)");
265 }
266 else if (!strcmp (var, "ip-proto"))
267 conf.ip_proto = atoi (val);
268 else if (!strcmp (var, "icmp-type"))
269 {
270#if ENABLE_ICMP
271 conf.icmp_type = atoi (val);
272#endif
273 }
274
275 // per config
276 else if (!strcmp (var, "node"))
277 {
278 parse_argv ();
279
280 conf.default_node.id++;
281 node = new conf_node (conf.default_node);
282 conf.nodes.push_back (node);
283 node->nodename = strdup (val);
284
285 {
286 char *fname;
287 FILE *f;
288
289 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
290
291 f = fopen (fname, "r");
292 if (f)
293 {
294 node->rsa_key = RSA_new ();
295
296 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
297 {
298 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
299 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
300 exit (EXIT_FAILURE);
301 }
302
303 require (RSA_blinding_on (node->rsa_key, 0));
304
305 fclose (f);
306 }
307 else
308 {
309 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
310
311 if (need_keys)
312 exit (EXIT_FAILURE);
313 }
314
315 free (fname);
316 }
317
318 if (::thisnode && !strcmp (node->nodename, ::thisnode))
319 conf.thisnode = node;
320 }
321 else if (!strcmp (var, "private-key"))
322 free (conf.prikeyfile), conf.prikeyfile = strdup (val);
323 else if (!strcmp (var, "ifpersist"))
324 parse_bool (conf.ifpersist, "ifpersist", true, false);
325 else if (!strcmp (var, "ifname"))
326 free (conf.ifname), conf.ifname = strdup (val);
327 else if (!strcmp (var, "rekey"))
328 conf.rekey = atoi (val);
329 else if (!strcmp (var, "keepalive"))
330 conf.keepalive = atoi (val);
331 else if (!strcmp (var, "mtu"))
332 conf.mtu = atoi (val);
333 else if (!strcmp (var, "if-up"))
334 free (conf.script_if_up), conf.script_if_up = strdup (val);
335 else if (!strcmp (var, "node-up"))
336 free (conf.script_node_up), conf.script_node_up = strdup (val);
337 else if (!strcmp (var, "node-down"))
338 free (conf.script_node_down), conf.script_node_down = strdup (val);
339 else if (!strcmp (var, "pid-file"))
340 free (conf.pidfilename), conf.pidfilename = strdup (val);
341 else if (!strcmp (var, "dns-forw-host"))
342 {
343#if ENABLE_DNS
344 free (conf.dns_forw_host), conf.dns_forw_host = strdup (val);
345#endif
346 }
347 else if (!strcmp (var, "dns-forw-port"))
348 {
349#if ENABLE_DNS
350 conf.dns_forw_port = atoi (val);
351#endif
352 }
353 else if (!strcmp (var, "dns-timeout-factor"))
354 {
355#if ENABLE_DNS
356 conf.dns_timeout_factor = atof (val);
357#endif
358 }
359 else if (!strcmp (var, "dns-send-interval"))
360 {
361#if ENABLE_DNS
362 conf.dns_send_interval = atoi (val);
363#endif
364 }
365 else if (!strcmp (var, "dns-overlap-factor"))
366 {
367#if ENABLE_DNS
368 conf.dns_overlap_factor = atof (val);
369#endif
370 }
371 else if (!strcmp (var, "dns-max-outstanding"))
372 {
373#if ENABLE_DNS
374 conf.dns_max_outstanding = atoi (val);
375#endif
376 }
377 else if (!strcmp (var, "http-proxy-host"))
378 {
379#if ENABLE_HTTP_PROXY
380 free (conf.proxy_host), conf.proxy_host = strdup (val);
381#endif
382 }
383 else if (!strcmp (var, "http-proxy-port"))
384 {
385#if ENABLE_HTTP_PROXY
386 conf.proxy_port = atoi (val);
387#endif
388 }
389 else if (!strcmp (var, "http-proxy-auth"))
390 {
391#if ENABLE_HTTP_PROXY
392 conf.proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val));
393#endif
394 }
395
396 /* node-specific, non-defaultable */
397 else if (node != &conf.default_node && !strcmp (var, "hostname"))
398 free (node->hostname), node->hostname = strdup (val);
399
400 /* node-specific, defaultable */
401 else if (!strcmp (var, "udp-port"))
402 node->udp_port = atoi (val);
403 else if (!strcmp (var, "tcp-port"))
404 node->tcp_port = atoi (val);
405 else if (!strcmp (var, "dns-hostname"))
406 {
407#if ENABLE_DNS
408 free (node->dns_hostname), node->dns_hostname = strdup (val);
409#endif
410 }
411 else if (!strcmp (var, "dns-port"))
412 {
413#if ENABLE_DNS
414 node->dns_port = atoi (val);
415#endif
416 }
417 else if (!strcmp (var, "dns-domain"))
418 {
419#if ENABLE_DNS
420 free (node->domain), node->domain = strdup (val);
421#endif
422 }
423 else if (!strcmp (var, "if-up-data"))
424 free (node->if_up_data), node->if_up_data = strdup (val);
425 else if (!strcmp (var, "router-priority"))
426 node->routerprio = atoi (val);
427 else if (!strcmp (var, "max-retry"))
428 node->max_retry = atoi (val);
429 else if (!strcmp (var, "connect"))
430 {
431 if (!strcmp (val, "ondemand"))
432 node->connectmode = conf_node::C_ONDEMAND;
433 else if (!strcmp (val, "never"))
434 node->connectmode = conf_node::C_NEVER;
435 else if (!strcmp (val, "always"))
436 node->connectmode = conf_node::C_ALWAYS;
437 else if (!strcmp (val, "disabled"))
438 node->connectmode = conf_node::C_DISABLED;
439 else
440 return _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled'. (ignored)");
441 }
442 else if (!strcmp (var, "inherit-tos"))
443 parse_bool (node->inherit_tos, "inherit-tos", true, false);
444 else if (!strcmp (var, "compress"))
445 parse_bool (node->compress, "compress", true, false);
446 // all these bool options really really cost a lot of executable size!
447 else if (!strcmp (var, "enable-tcp"))
448 {
449#if ENABLE_TCP
450 u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v;
451#endif
452 }
453 else if (!strcmp (var, "enable-icmp"))
454 {
455#if ENABLE_ICMP
456 u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v;
457#endif
458 }
459 else if (!strcmp (var, "enable-dns"))
460 {
461#if ENABLE_DNS
462 u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) | v;
463#endif
464 }
465 else if (!strcmp (var, "enable-udp"))
466 {
467 u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v;
468 }
469 else if (!strcmp (var, "enable-rawip"))
470 {
471 u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v;
472 }
473 else if (!strcmp (var, "allow-direct"))
474 node->allow_direct.push_back (strdup (val));
475 else if (!strcmp (var, "deny-direct"))
476 node->deny_direct.push_back (strdup (val));
477 else if (!strcmp (var, "max-ttl"))
478 node->max_ttl = atof (val);
479 else if (!strcmp (var, "max-queue"))
480 node->max_queue = atoi (val);
481
482 // unknown or misplaced
483 else
484 return _("unknown configuration directive. (ignored)");
485
486 return 0;
487}
488
489void configuration_parser::parse_argv ()
490{
491 for (int i = 0; i < argc; ++i)
492 {
493 char *v = argv [i];
494
495 if (!*v)
496 continue;
497
498 char *enode = v;
499
500 while (*enode != '.' && *enode > ' ' && *enode != '=' && *enode)
501 enode++;
502
503 if (*enode != '.')
504 enode = 0;
505
506 char *wnode = node == &conf.default_node
507 ? 0
508 : node->nodename;
509
510 if ((!wnode && !enode)
511 || (wnode && enode && !strncmp (wnode, v, enode - v)))
512 {
513 const char *warn = parse_line (enode ? enode + 1 : v);
514
515 if (warn)
516 slog (L_WARN, _("%s, while parsing command line option '%s'."), warn, v);
517
518 *v = 0;
519 }
520 }
521}
522
523configuration_parser::configuration_parser (configuration &conf,
524 bool need_keys,
525 int argc,
526 char **argv)
527: conf (conf),need_keys (need_keys), argc (argc), argv (argv)
528{
529 char *fname;
530 FILE *f;
531
532 conf.clear ();
533
534 asprintf (&fname, "%s/gvpe.conf", confbase);
535 f = fopen (fname, "r");
536
537 if (f)
538 {
539 char line[16384];
540 int lineno = 0;
541 node = &conf.default_node;
542
543 while (fgets (line, sizeof (line), f))
544 {
545 lineno++;
546
547 const char *warn = parse_line (line);
548
549 if (warn)
550 slog (L_WARN, _("%s, at '%s', line %d."), warn, fname, lineno);
551 }
552
553 fclose (f);
554
555 parse_argv ();
556 }
557 else
558 {
559 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
560 exit (EXIT_FAILURE);
561 }
562
563 free (fname);
564
565 fname = conf.config_filename (conf.prikeyfile, "hostkey");
566
567 f = fopen (fname, "r");
568 if (f)
569 {
570 conf.rsa_key = RSA_new ();
571
572 if (!PEM_read_RSAPrivateKey (f, &conf.rsa_key, NULL, NULL))
573 {
574 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
575 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
576 exit (EXIT_FAILURE);
577 }
578
579 require (RSA_blinding_on (conf.rsa_key, 0));
580
581 fclose (f);
582 }
583 else
584 {
585 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
586
587 if (need_keys)
588 exit (EXIT_FAILURE);
589 }
590
591 if (need_keys && ::thisnode
592 && conf.rsa_key && conf.thisnode && conf.thisnode->rsa_key)
593 if (BN_cmp (conf.rsa_key->n, conf.thisnode->rsa_key->n) != 0
594 || BN_cmp (conf.rsa_key->e, conf.thisnode->rsa_key->e) != 0)
595 {
596 slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
597 exit (EXIT_FAILURE);
598 }
599
600 free (fname);
601}
602
603char *configuration::config_filename (const char *name, const char *dflt)
604{
605 char *fname;
606
607 asprintf (&fname, name ? name : dflt, ::thisnode);
608
609 if (!ABSOLUTE_PATH (fname))
610 {
611 char *rname = fname;
612 asprintf (&fname, "%s/%s", confbase, rname);
613 free (rname);
614 }
615
616 return fname;
617}
618
619void
620configuration::print ()
621{
622 printf (_("\nConfiguration\n\n"));
623 printf (_("# of nodes: %d\n"), nodes.size ());
624 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
625 printf (_("MTU: %d\n"), mtu);
626 printf (_("rekeying interval: %d\n"), rekey);
627 printf (_("keepalive interval: %d\n"), keepalive);
628 printf (_("interface: %s\n"), ifname);
629 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
630 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
631 printf ("\n");
632
633 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
634 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
635
636 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
637 (*i)->print ();
638
639 printf ("\n");
640}
641
642configuration::configuration ()
643{
644 asprintf (&confbase, "%s/gvpe", CONFDIR);
645
646 init ();
647}
648
649configuration::~configuration ()
650{
651 cleanup ();
652}
653
654

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