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Comparing gvpe/src/conf.C (file contents):
Revision 1.5 by pcg, Fri Mar 28 04:05:10 2003 UTC vs.
Revision 1.40 by pcg, Mon Mar 28 20:39:18 2005 UTC

1/* 1/*
2 conf.c -- configuration code 2 conf.c -- configuration code
3 Copyright (C) 1998 Robert van der Meulen 3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
4 1998-2002 Ivo Timmermans <ivo@o2w.nl>
5 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
6 2000 Cris van Pelt <tribbel@arise.dhs.org>
7 2003 Marc Lehmann <pcg@goof.com>
8 4
5 This file is part of GVPE.
6
9 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by 8 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or 9 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version. 10 (at your option) any later version.
13 11
14 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details. 15 GNU General Public License for more details.
18 16
19 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
21 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22*/ 20*/
23 21
24#include "config.h" 22#include "config.h"
25 23
31#include <netdb.h> 29#include <netdb.h>
32#include <sys/stat.h> 30#include <sys/stat.h>
33#include <sys/types.h> 31#include <sys/types.h>
34#include <unistd.h> 32#include <unistd.h>
35 33
36#include <netinet/in.h> 34#include "netcompat.h"
37 35
38#include <openssl/err.h> 36#include <openssl/err.h>
39#include <openssl/pem.h> 37#include <openssl/pem.h>
40#include <openssl/rsa.h> 38#include <openssl/rsa.h>
41#include <openssl/rand.h> 39#include <openssl/rand.h>
42 40#include <openssl/bn.h>
43#include "gettext.h"
44 41
45#include "conf.h" 42#include "conf.h"
46#include "slog.h" 43#include "slog.h"
47#include "util.h" 44#include "util.h"
48 45
49char *confbase; 46char *confbase;
50char *thisnode; 47char *thisnode;
51char *identname; 48char *identname;
52char *pidfilename;
53 49
54struct configuration conf; 50struct configuration conf;
55 51
56configuration::configuration () 52u8 best_protocol (u8 protset)
57{ 53{
58 init (); 54 if (protset & PROT_IPv4 ) return PROT_IPv4;
59} 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;
60 59
61configuration::~configuration ()
62{
63 cleanup ();
64}
65
66void configuration::init ()
67{
68 memset (this, 0, sizeof (*this));
69
70 rekey = DEFAULT_REKEY;
71 keepalive = DEFAULT_KEEPALIVE;
72 llevel = L_INFO;
73 ip_proto = IPPROTO_GRE;
74
75 default_node.udp_port = DEFAULT_UDPPORT;
76 default_node.connectmode = conf_node::C_ALWAYS;
77 default_node.compress = true;
78 default_node.can_send = PROT_UDPv4;
79 default_node.can_recv = PROT_IPv4;
80}
81
82void configuration::cleanup()
83{
84 if (rsa_key)
85 RSA_free (rsa_key);
86
87 free (ifname);
88
89 rsa_key = 0;
90 ifname = 0;
91}
92
93void
94configuration::clear_config ()
95{
96 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
97 delete *i;
98
99 nodes.clear ();
100
101 cleanup ();
102 init ();
103}
104
105#define parse_bool(target,name,trueval,falseval) \
106 if (!strcmp (val, "yes")) target = trueval; \
107 else if (!strcmp (val, "no")) target = falseval; \
108 else if (!strcmp (val, "true")) target = trueval; \
109 else if (!strcmp (val, "false")) target = falseval; \
110 else if (!strcmp (val, "on")) target = trueval; \
111 else if (!strcmp (val, "off")) target = falseval; \
112 else \
113 slog (L_WARN, \
114 _("illegal value for '%s', only 'yes|true|on' or 'no|false|off' allowed, at '%s' line %d"), \
115 name, var, fname, lineno);
116
117void configuration::read_config (bool need_keys)
118{
119 char *fname;
120 FILE *f;
121
122 clear_config ();
123
124 asprintf (&fname, "%s/vped.conf", confbase);
125 f = fopen (fname, "r");
126
127 if (f)
128 {
129 char line[16384];
130 int lineno = 0;
131 char *var, *val;
132 conf_node *node = &default_node;
133
134 while (fgets (line, sizeof (line), f))
135 {
136 lineno++;
137
138 {
139 char *end = line + strlen (line);
140
141 while (*end < ' ' && end >= line)
142 end--;
143
144 *++end = 0;
145 }
146
147 char *tok = line;
148
149retry:
150 var = strtok (tok, "\t =");
151 tok = 0;
152
153 if (!var || !var[0])
154 continue; /* no tokens on this line */
155
156 if (var[0] == '#')
157 continue; /* comment: ignore */
158
159 val = strtok (NULL, "\t\n\r =");
160
161 if (!val || val[0] == '#')
162 {
163 slog (L_WARN,
164 _("no value for variable `%s', at '%s' line %d"),
165 var, fname, lineno);
166 break;
167 }
168
169 if (!strcmp (var, "on"))
170 {
171 if (!::thisnode
172 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
173 || !strcmp (val, ::thisnode))
174 goto retry;
175
176 continue;
177 }
178
179 // truly global
180 if (!strcmp (var, "loglevel"))
181 {
182 loglevel l = string_to_loglevel (val);
183
184 if (l != L_NONE)
185 llevel = l;
186 else
187 slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
188 }
189 else if (!strcmp (var, "ip-proto"))
190 ip_proto = atoi (val);
191
192 // per config
193 else if (!strcmp (var, "node"))
194 {
195 default_node.id++;
196
197 node = new conf_node (default_node);
198
199 nodes.push_back (node);
200
201 node->nodename = strdup (val);
202
203 {
204 char *fname;
205 FILE *f;
206
207 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
208
209 f = fopen (fname, "r");
210 if (f)
211 {
212 node->rsa_key = RSA_new ();
213
214 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
215 {
216 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
217 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
218 exit (1);
219 }
220
221 RSA_blinding_on (node->rsa_key, 0);
222
223 fclose (f);
224 }
225 else
226 {
227 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
228
229 if (need_keys)
230 exit (1);
231 }
232
233 free (fname);
234 }
235
236 if (!::thisnode || !strcmp (node->nodename, ::thisnode))
237 thisnode = node;
238 }
239 else if (!strcmp (var, "private-key"))
240 prikeyfile = strdup (val);
241 else if (!strcmp (var, "ifpersist"))
242 {
243 parse_bool (ifpersist, "ifpersist", true, false);
244 }
245 else if (!strcmp (var, "ifname"))
246 ifname = strdup (val);
247 else if (!strcmp (var, "rekey"))
248 rekey = atoi (val);
249 else if (!strcmp (var, "keepalive"))
250 keepalive = atoi (val);
251 else if (!strcmp (var, "mtu"))
252 mtu = atoi (val);
253 else if (!strcmp (var, "if-up"))
254 script_if_up = strdup (val);
255 else if (!strcmp (var, "node-up"))
256 script_node_up = strdup (val);
257 else if (!strcmp (var, "node-down"))
258 script_node_down = strdup (val);
259
260 /* node-specific, non-defaultable */
261 else if (node != &default_node && !strcmp (var, "hostname"))
262 {
263 free (node->hostname);
264 node->hostname = strdup (val);
265 }
266
267 /* node-specific, defaultable */
268 else if (!strcmp (var, "udp-port"))
269 node->udp_port = atoi (val);
270 else if (!strcmp (var, "router-priority"))
271 node->routerprio = atoi (val);
272 else if (!strcmp (var, "connect"))
273 {
274 if (!strcmp (val, "ondemand"))
275 node->connectmode = conf_node::C_ONDEMAND;
276 else if (!strcmp (val, "never"))
277 node->connectmode = conf_node::C_NEVER;
278 else if (!strcmp (val, "always"))
279 node->connectmode = conf_node::C_ALWAYS;
280 else if (!strcmp (val, "disabled"))
281 node->connectmode = conf_node::C_DISABLED;
282 else
283 slog (L_WARN,
284 _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
285 var, fname, lineno);
286 }
287 else if (!strcmp (var, "inherit-tos"))
288 {
289 parse_bool (node->inherit_tos, "inherit-tos", true, false);
290 }
291 else if (!strcmp (var, "compress"))
292 {
293 parse_bool (node->compress, "compress", true, false);
294 }
295 // all these bool options really really cost a lot of executable size!
296 else if (!strcmp (var, "can-send-udp"))
297 {
298 u8 v; parse_bool (v, "can-send-udp", PROT_UDPv4, 0); node->can_send = (node->can_send & ~PROT_UDPv4) | v;
299 }
300 else if (!strcmp (var, "can-recv-udp"))
301 {
302 u8 v; parse_bool (v, "can-recv-udp", PROT_UDPv4, 0); node->can_recv = (node->can_recv & ~PROT_UDPv4) | v;
303 }
304 else if (!strcmp (var, "can-send-rawip"))
305 {
306 u8 v; parse_bool (v, "can-send-rawip", PROT_IPv4, 0); node->can_send = (node->can_send & ~PROT_IPv4) | v;
307 }
308 else if (!strcmp (var, "can-recv-rawip"))
309 {
310 u8 v; parse_bool (v, "can-recv-rawip", PROT_IPv4, 0); node->can_recv = (node->can_recv & ~PROT_IPv4) | v;
311 }
312
313 // unknown or misplaced
314 else
315 {
316 slog (L_WARN,
317 _("unknown or misplaced variable `%s', at '%s' line %d"),
318 var, fname, lineno);
319 }
320 }
321
322 fclose (f);
323 }
324 else
325 {
326 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
327 exit (1);
328 }
329
330 free (fname);
331
332 fname = config_filename (prikeyfile, "hostkey");
333
334 f = fopen (fname, "r");
335 if (f)
336 {
337 rsa_key = RSA_new ();
338
339 if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
340 {
341 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
342 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
343 exit (1);
344 }
345
346 RSA_blinding_on (rsa_key, 0);
347
348 fclose (f);
349 }
350 else
351 {
352 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
353
354 if (need_keys)
355 exit (1);
356 }
357
358 free (fname);
359}
360
361char *configuration::config_filename (const char *name, const char *dflt)
362{
363 char *fname;
364
365 asprintf (&fname, name ? name : dflt, ::thisnode);
366
367 if (!ABSOLUTE_PATH (fname))
368 {
369 char *rname = fname;
370 asprintf (&fname, "%s/%s", confbase, rname);
371 free (rname);
372 }
373
374 return fname; 60 return 0;
375} 61}
376 62
377void 63const char *strprotocol (u8 protocol)
378configuration::print ()
379{ 64{
380 printf (_("\nConfiguration\n\n")); 65 if (protocol & PROT_IPv4 ) return "rawip";
381 printf (_("# of nodes: %d\n"), nodes.size ()); 66 if (protocol & PROT_ICMPv4) return "icmp";
382 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>"); 67 if (protocol & PROT_UDPv4 ) return "udp";
383 printf (_("MTU: %d\n"), mtu); 68 if (protocol & PROT_TCPv4 ) return "tcp";
384 printf (_("rekeying interval: %d\n"), rekey); 69 if (protocol & PROT_DNSv4 ) return "dns";
385 printf (_("keepalive interval: %d\n"), keepalive);
386 printf (_("interface: %s\n"), ifname);
387 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
388 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1);
389 printf ("\n");
390 70
391 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", 71 return "<unknown>";
392 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
393
394 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
395 (*i)->print ();
396
397 printf ("\n");
398} 72}
399 73
400void 74void
401conf_node::print () 75conf_node::print ()
402{ 76{
412 hostname ? ":" : "", 86 hostname ? ":" : "",
413 hostname ? udp_port : 0 87 hostname ? udp_port : 0
414 ); 88 );
415} 89}
416 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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