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Comparing gvpe/src/conf.C (file contents):
Revision 1.11 by pcg, Wed Apr 2 21:43:44 2003 UTC vs.
Revision 1.45 by pcg, Fri Aug 8 16:48:00 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";
69 if (protocol & PROT_TCPv4) return "tcp"; 78 if (protocol & PROT_TCPv4 ) return "tcp";
79 if (protocol & PROT_DNSv4 ) return "dns";
70 80
71 return "<unknown>"; 81 return "<unknown>";
72} 82}
73 83
74configuration::configuration () 84static bool
85match_list (const vector<const char *> &list, const char *str)
75{ 86{
76 init (); 87 for (vector<const char *>::const_iterator i = list.end (); i-- > list.begin (); )
77} 88 if ((*i)[0] == '*' && !(*i)[1])
89 return true;
90 else if (!strcmp (*i, str))
91 return true;
78 92
79configuration::~configuration ()
80{
81 cleanup ();
82}
83
84void configuration::init ()
85{
86 memset (this, 0, sizeof (*this));
87
88 rekey = DEFAULT_REKEY;
89 keepalive = DEFAULT_KEEPALIVE;
90 llevel = L_INFO;
91 ip_proto = IPPROTO_GRE;
92
93 default_node.udp_port = DEFAULT_UDPPORT;
94 default_node.tcp_port = DEFAULT_UDPPORT;
95 default_node.connectmode = conf_node::C_ALWAYS;
96 default_node.compress = true;
97 default_node.protocols = PROT_UDPv4;
98}
99
100void configuration::cleanup()
101{
102 if (rsa_key)
103 RSA_free (rsa_key);
104
105 free (ifname);
106
107 rsa_key = 0;
108 ifname = 0;
109}
110
111void
112configuration::clear_config ()
113{
114 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
115 delete *i;
116
117 nodes.clear ();
118
119 cleanup ();
120 init ();
121}
122
123#define parse_bool(target,name,trueval,falseval) \
124 if (!strcmp (val, "yes")) target = trueval; \
125 else if (!strcmp (val, "no")) target = falseval; \
126 else if (!strcmp (val, "true")) target = trueval; \
127 else if (!strcmp (val, "false")) target = falseval; \
128 else if (!strcmp (val, "on")) target = trueval; \
129 else if (!strcmp (val, "off")) target = falseval; \
130 else \
131 slog (L_WARN, \
132 _("illegal value for '%s', only 'yes|true|on' or 'no|false|off' allowed, at '%s' line %d"), \
133 name, var, fname, lineno);
134
135void configuration::read_config (bool need_keys)
136{
137 char *fname;
138 FILE *f;
139
140 clear_config ();
141
142 asprintf (&fname, "%s/vped.conf", confbase);
143 f = fopen (fname, "r");
144
145 if (f)
146 {
147 char line[16384];
148 int lineno = 0;
149 char *var, *val;
150 conf_node *node = &default_node;
151
152 while (fgets (line, sizeof (line), f))
153 {
154 lineno++;
155
156 {
157 char *end = line + strlen (line);
158
159 while (*end < ' ' && end >= line)
160 end--;
161
162 *++end = 0;
163 }
164
165 char *tok = line;
166
167retry:
168 var = strtok (tok, "\t =");
169 tok = 0;
170
171 if (!var || !var[0])
172 continue; /* no tokens on this line */
173
174 if (var[0] == '#')
175 continue; /* comment: ignore */
176
177 val = strtok (NULL, "\t\n\r =");
178
179 if (!val || val[0] == '#')
180 {
181 slog (L_WARN,
182 _("no value for variable `%s', at '%s' line %d"),
183 var, fname, lineno);
184 break;
185 }
186
187 if (!strcmp (var, "on"))
188 {
189 if (!::thisnode
190 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
191 || !strcmp (val, ::thisnode))
192 goto retry;
193
194 continue;
195 }
196
197 // truly global
198 if (!strcmp (var, "loglevel"))
199 {
200 loglevel l = string_to_loglevel (val);
201
202 if (l != L_NONE)
203 llevel = l;
204 else
205 slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
206 }
207 else if (!strcmp (var, "ip-proto"))
208 ip_proto = atoi (val);
209
210 // per config
211 else if (!strcmp (var, "node"))
212 {
213 default_node.id++;
214
215 node = new conf_node (default_node);
216
217 nodes.push_back (node);
218
219 node->nodename = strdup (val);
220
221 {
222 char *fname;
223 FILE *f;
224
225 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
226
227 f = fopen (fname, "r");
228 if (f)
229 {
230 node->rsa_key = RSA_new ();
231
232 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
233 {
234 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
235 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
236 exit (1);
237 }
238
239 RSA_blinding_on (node->rsa_key, 0);
240
241 fclose (f);
242 }
243 else
244 {
245 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
246
247 if (need_keys)
248 exit (1);
249 }
250
251 free (fname);
252 }
253
254 if (!::thisnode || !strcmp (node->nodename, ::thisnode))
255 thisnode = node;
256 }
257 else if (!strcmp (var, "private-key"))
258 prikeyfile = strdup (val);
259 else if (!strcmp (var, "ifpersist"))
260 {
261 parse_bool (ifpersist, "ifpersist", true, false);
262 }
263 else if (!strcmp (var, "ifname"))
264 ifname = strdup (val);
265 else if (!strcmp (var, "rekey"))
266 rekey = atoi (val);
267 else if (!strcmp (var, "keepalive"))
268 keepalive = atoi (val);
269 else if (!strcmp (var, "mtu"))
270 mtu = atoi (val);
271 else if (!strcmp (var, "if-up"))
272 script_if_up = strdup (val);
273 else if (!strcmp (var, "node-up"))
274 script_node_up = strdup (val);
275 else if (!strcmp (var, "node-down"))
276 script_node_down = strdup (val);
277
278 /* node-specific, non-defaultable */
279 else if (node != &default_node && !strcmp (var, "hostname"))
280 {
281 free (node->hostname);
282 node->hostname = strdup (val);
283 }
284
285 /* node-specific, defaultable */
286 else if (!strcmp (var, "udp-port"))
287 node->udp_port = atoi (val);
288 else if (!strcmp (var, "tcp-port"))
289 node->tcp_port = atoi (val);
290 else if (!strcmp (var, "router-priority"))
291 node->routerprio = atoi (val);
292 else if (!strcmp (var, "connect"))
293 {
294 if (!strcmp (val, "ondemand"))
295 node->connectmode = conf_node::C_ONDEMAND;
296 else if (!strcmp (val, "never"))
297 node->connectmode = conf_node::C_NEVER;
298 else if (!strcmp (val, "always"))
299 node->connectmode = conf_node::C_ALWAYS;
300 else if (!strcmp (val, "disabled"))
301 node->connectmode = conf_node::C_DISABLED;
302 else
303 slog (L_WARN,
304 _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
305 var, fname, lineno);
306 }
307 else if (!strcmp (var, "inherit-tos"))
308 {
309 parse_bool (node->inherit_tos, "inherit-tos", true, false);
310 }
311 else if (!strcmp (var, "compress"))
312 {
313 parse_bool (node->compress, "compress", true, false);
314 }
315 // all these bool options really really cost a lot of executable size!
316 else if (!strcmp (var, "enable-tcp"))
317 {
318#if ENABLE_TCP
319 u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v;
320#endif
321 }
322 else if (!strcmp (var, "enable-udp"))
323 {
324 u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v;
325 }
326 else if (!strcmp (var, "enable-rawip"))
327 {
328 u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v;
329 }
330
331 // unknown or misplaced
332 else
333 {
334 slog (L_WARN,
335 _("unknown or misplaced variable `%s', at '%s' line %d"),
336 var, fname, lineno);
337 }
338 }
339
340 fclose (f);
341 }
342 else
343 {
344 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
345 exit (1);
346 }
347
348 free (fname);
349
350 fname = config_filename (prikeyfile, "hostkey");
351
352 f = fopen (fname, "r");
353 if (f)
354 {
355 rsa_key = RSA_new ();
356
357 if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
358 {
359 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
360 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
361 exit (1);
362 }
363
364 RSA_blinding_on (rsa_key, 0);
365
366 fclose (f);
367 }
368 else
369 {
370 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
371
372 if (need_keys)
373 exit (1);
374 }
375
376 free (fname);
377}
378
379char *configuration::config_filename (const char *name, const char *dflt)
380{
381 char *fname;
382
383 asprintf (&fname, name ? name : dflt, ::thisnode);
384
385 if (!ABSOLUTE_PATH (fname))
386 {
387 char *rname = fname;
388 asprintf (&fname, "%s/%s", confbase, rname);
389 free (rname);
390 }
391
392 return fname; 93 return false;
393} 94}
394 95
395void 96bool
396configuration::print () 97conf_node::can_direct (struct conf_node *other)
397{ 98{
398 printf (_("\nConfiguration\n\n")); 99 if (match_list (allow_direct, other->nodename))
399 printf (_("# of nodes: %d\n"), nodes.size ()); 100 return true;
400 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
401 printf (_("MTU: %d\n"), mtu);
402 printf (_("rekeying interval: %d\n"), rekey);
403 printf (_("keepalive interval: %d\n"), keepalive);
404 printf (_("interface: %s\n"), ifname);
405 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
406 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1);
407 printf ("\n");
408 101
409 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", 102 if (match_list (deny_direct, other->nodename))
410 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); 103 return false;
411 104
412 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i) 105 return true;
413 (*i)->print ();
414
415 printf ("\n");
416} 106}
417 107
418void 108void
419conf_node::print () 109conf_node::print ()
420{ 110{
… …
430 hostname ? ":" : "", 120 hostname ? ":" : "",
431 hostname ? udp_port : 0 121 hostname ? udp_port : 0
432 ); 122 );
433} 123}
434 124
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 {
481 node->max_queue = atoi (val);
482
483 if (node->max_queue < 1)
484 node->max_queue = 1;
485 }
486
487 // unknown or misplaced
488 else
489 return _("unknown configuration directive. (ignored)");
490
491 return 0;
492}
493
494void configuration_parser::parse_argv ()
495{
496 for (int i = 0; i < argc; ++i)
497 {
498 char *v = argv [i];
499
500 if (!*v)
501 continue;
502
503 char *enode = v;
504
505 while (*enode != '.' && *enode > ' ' && *enode != '=' && *enode)
506 enode++;
507
508 if (*enode != '.')
509 enode = 0;
510
511 char *wnode = node == &conf.default_node
512 ? 0
513 : node->nodename;
514
515 if ((!wnode && !enode)
516 || (wnode && enode && !strncmp (wnode, v, enode - v)))
517 {
518 const char *warn = parse_line (enode ? enode + 1 : v);
519
520 if (warn)
521 slog (L_WARN, _("%s, while parsing command line option '%s'."), warn, v);
522
523 *v = 0;
524 }
525 }
526}
527
528configuration_parser::configuration_parser (configuration &conf,
529 bool need_keys,
530 int argc,
531 char **argv)
532: conf (conf),need_keys (need_keys), argc (argc), argv (argv)
533{
534 char *fname;
535 FILE *f;
536
537 conf.clear ();
538
539 asprintf (&fname, "%s/gvpe.conf", confbase);
540 f = fopen (fname, "r");
541
542 if (f)
543 {
544 char line[16384];
545 int lineno = 0;
546 node = &conf.default_node;
547
548 while (fgets (line, sizeof (line), f))
549 {
550 lineno++;
551
552 const char *warn = parse_line (line);
553
554 if (warn)
555 slog (L_WARN, _("%s, at '%s', line %d."), warn, fname, lineno);
556 }
557
558 fclose (f);
559
560 parse_argv ();
561 }
562 else
563 {
564 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
565 exit (EXIT_FAILURE);
566 }
567
568 free (fname);
569
570 fname = conf.config_filename (conf.prikeyfile, "hostkey");
571
572 f = fopen (fname, "r");
573 if (f)
574 {
575 conf.rsa_key = RSA_new ();
576
577 if (!PEM_read_RSAPrivateKey (f, &conf.rsa_key, NULL, NULL))
578 {
579 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
580 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
581 exit (EXIT_FAILURE);
582 }
583
584 require (RSA_blinding_on (conf.rsa_key, 0));
585
586 fclose (f);
587 }
588 else
589 {
590 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
591
592 if (need_keys)
593 exit (EXIT_FAILURE);
594 }
595
596 if (need_keys && ::thisnode
597 && conf.rsa_key && conf.thisnode && conf.thisnode->rsa_key)
598 if (BN_cmp (conf.rsa_key->n, conf.thisnode->rsa_key->n) != 0
599 || BN_cmp (conf.rsa_key->e, conf.thisnode->rsa_key->e) != 0)
600 {
601 slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
602 exit (EXIT_FAILURE);
603 }
604
605 free (fname);
606}
607
608char *configuration::config_filename (const char *name, const char *dflt)
609{
610 char *fname;
611
612 asprintf (&fname, name ? name : dflt, ::thisnode);
613
614 if (!ABSOLUTE_PATH (fname))
615 {
616 char *rname = fname;
617 asprintf (&fname, "%s/%s", confbase, rname);
618 free (rname);
619 }
620
621 return fname;
622}
623
624void
625configuration::print ()
626{
627 printf (_("\nConfiguration\n\n"));
628 printf (_("# of nodes: %d\n"), nodes.size ());
629 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
630 printf (_("MTU: %d\n"), mtu);
631 printf (_("rekeying interval: %d\n"), rekey);
632 printf (_("keepalive interval: %d\n"), keepalive);
633 printf (_("interface: %s\n"), ifname);
634 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
635 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
636 printf ("\n");
637
638 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
639 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
640
641 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
642 (*i)->print ();
643
644 printf ("\n");
645}
646
647configuration::configuration ()
648{
649 asprintf (&confbase, "%s/gvpe", CONFDIR);
650
651 init ();
652}
653
654configuration::~configuration ()
655{
656 cleanup ();
657}
658
659

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