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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 1.42 by pcg, Mon Dec 5 12:58:08 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. 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
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 () 60 return 0;
62{
63 cleanup ();
64} 61}
65 62
66void configuration::init () 63const char *strprotocol (u8 protocol)
67{ 64{
68 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";
69 70
70 rekey = DEFAULT_REKEY; 71 return "<unknown>";
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} 72}
81 73
82void configuration::cleanup() 74static bool
75match_list (const vector<const char *> &list, const char *str)
83{ 76{
84 if (rsa_key) 77 for (vector<const char *>::const_iterator i = list.end (); i-- > list.begin (); )
85 RSA_free (rsa_key); 78 if ((*i)[0] == '*' && !(*i)[1])
79 return true;
80 else if (!strcmp (*i, str))
81 return true;
86 82
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; 83 return false;
375} 84}
376 85
377void 86bool
378configuration::print () 87conf_node::can_direct (struct conf_node *other)
379{ 88{
380 printf (_("\nConfiguration\n\n")); 89 if (match_list (allow_direct, other->nodename))
381 printf (_("# of nodes: %d\n"), nodes.size ()); 90 return true;
382 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
383 printf (_("MTU: %d\n"), mtu);
384 printf (_("rekeying interval: %d\n"), rekey);
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 91
391 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", 92 if (match_list (deny_direct, other->nodename))
392 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); 93 return false;
393 94
394 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i) 95 return true;
395 (*i)->print ();
396
397 printf ("\n");
398} 96}
399 97
400void 98void
401conf_node::print () 99conf_node::print ()
402{ 100{
… …
412 hostname ? ":" : "", 110 hostname ? ":" : "",
413 hostname ? udp_port : 0 111 hostname ? udp_port : 0
414 ); 112 );
415} 113}
416 114
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.if_up_data = strdup ("");
153
154#if ENABLE_DNS
155 default_node.dns_port = 0; // default is 0 == client
156
157 dns_forw_host = strdup ("127.0.0.1");
158 dns_forw_port = 53;
159 dns_timeout_factor = DEFAULT_DNS_TIMEOUT_FACTOR;
160 dns_send_interval = DEFAULT_DNS_SEND_INTERVAL;
161 dns_overlap_factor = DEFAULT_DNS_OVERLAP_FACTOR;
162 dns_max_outstanding = DEFAULT_DNS_MAX_OUTSTANDING;
163#endif
164
165 conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
166}
167
168void configuration::cleanup()
169{
170 if (rsa_key)
171 RSA_free (rsa_key);
172
173 rsa_key = 0;
174
175 free (pidfilename); pidfilename = 0;
176 free (ifname); ifname = 0;
177#if ENABLE_HTTP_PROXY
178 free (proxy_host); proxy_host = 0;
179 free (proxy_auth); proxy_auth = 0;
180#endif
181#if ENABLE_DNS
182 free (dns_forw_host); dns_forw_host = 0;
183#endif
184}
185
186void
187configuration::clear ()
188{
189 for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
190 delete *i;
191
192 nodes.clear ();
193
194 cleanup ();
195 init ();
196}
197
198#define parse_bool(target,name,trueval,falseval) do { \
199 if (!strcmp (val, "yes")) target = trueval; \
200 else if (!strcmp (val, "no")) target = falseval; \
201 else if (!strcmp (val, "true")) target = trueval; \
202 else if (!strcmp (val, "false")) target = falseval; \
203 else if (!strcmp (val, "on")) target = trueval; \
204 else if (!strcmp (val, "off")) target = falseval; \
205 else \
206 return _("illegal boolean value, only 'yes|true|on' or 'no|false|off' allowed. (ignored)"); \
207} while (0)
208
209const char *
210configuration_parser::parse_line (char *line)
211{
212 {
213 char *end = line + strlen (line);
214
215 while (*end < ' ' && end >= line)
216 end--;
217
218 *++end = 0;
219 }
220
221 char *tok = line;
222 const char *var = strtok (tok, "\t =");
223 tok = 0;
224
225 if (!var || !var[0])
226 return 0; /* no tokens on this line */
227
228 if (var[0] == '#')
229 return 0; /* comment: ignore */
230
231 char *val = strtok (NULL, "\t\n\r =");
232
233 if (!val || val[0] == '#')
234 return _("no value given for variable. (ignored)");
235
236 if (!strcmp (var, "on"))
237 {
238 if (!::thisnode
239 || (val[0] == '!' && strcmp (val + 1, ::thisnode))
240 || !strcmp (val, ::thisnode))
241 return parse_line (strtok (NULL, "\n\r"));
242 else
243 return 0;
244 }
245
246 // truly global
247 if (!strcmp (var, "loglevel"))
248 {
249 loglevel l = string_to_loglevel (val);
250
251 if (l == L_NONE)
252 return _("unknown loglevel. (skipping)");
253 }
254 else if (!strcmp (var, "ip-proto"))
255 conf.ip_proto = atoi (val);
256 else if (!strcmp (var, "icmp-type"))
257 {
258#if ENABLE_ICMP
259 conf.icmp_type = atoi (val);
260#endif
261 }
262
263 // per config
264 else if (!strcmp (var, "node"))
265 {
266 parse_argv ();
267
268 conf.default_node.id++;
269 node = new conf_node (conf.default_node);
270 conf.nodes.push_back (node);
271 node->nodename = strdup (val);
272
273 {
274 char *fname;
275 FILE *f;
276
277 asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
278
279 f = fopen (fname, "r");
280 if (f)
281 {
282 node->rsa_key = RSA_new ();
283
284 if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
285 {
286 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
287 slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
288 exit (EXIT_FAILURE);
289 }
290
291 require (RSA_blinding_on (node->rsa_key, 0));
292
293 fclose (f);
294 }
295 else
296 {
297 slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
298
299 if (need_keys)
300 exit (EXIT_FAILURE);
301 }
302
303 free (fname);
304 }
305
306 if (::thisnode && !strcmp (node->nodename, ::thisnode))
307 conf.thisnode = node;
308 }
309 else if (!strcmp (var, "private-key"))
310 free (conf.prikeyfile), conf.prikeyfile = strdup (val);
311 else if (!strcmp (var, "ifpersist"))
312 parse_bool (conf.ifpersist, "ifpersist", true, false);
313 else if (!strcmp (var, "ifname"))
314 free (conf.ifname), conf.ifname = strdup (val);
315 else if (!strcmp (var, "rekey"))
316 conf.rekey = atoi (val);
317 else if (!strcmp (var, "keepalive"))
318 conf.keepalive = atoi (val);
319 else if (!strcmp (var, "mtu"))
320 conf.mtu = atoi (val);
321 else if (!strcmp (var, "if-up"))
322 free (conf.script_if_up), conf.script_if_up = strdup (val);
323 else if (!strcmp (var, "node-up"))
324 free (conf.script_node_up), conf.script_node_up = strdup (val);
325 else if (!strcmp (var, "node-down"))
326 free (conf.script_node_down), conf.script_node_down = strdup (val);
327 else if (!strcmp (var, "pid-file"))
328 free (conf.pidfilename), conf.pidfilename = strdup (val);
329 else if (!strcmp (var, "dns-forw-host"))
330 {
331#if ENABLE_DNS
332 free (conf.dns_forw_host), conf.dns_forw_host = strdup (val);
333#endif
334 }
335 else if (!strcmp (var, "dns-forw-port"))
336 {
337#if ENABLE_DNS
338 conf.dns_forw_port = atoi (val);
339#endif
340 }
341 else if (!strcmp (var, "dns-timeout-factor"))
342 {
343#if ENABLE_DNS
344 conf.dns_timeout_factor = atof (val);
345#endif
346 }
347 else if (!strcmp (var, "dns-send-interval"))
348 {
349#if ENABLE_DNS
350 conf.dns_send_interval = atoi (val);
351#endif
352 }
353 else if (!strcmp (var, "dns-overlap-factor"))
354 {
355#if ENABLE_DNS
356 conf.dns_overlap_factor = atof (val);
357#endif
358 }
359 else if (!strcmp (var, "dns-max-outstanding"))
360 {
361#if ENABLE_DNS
362 conf.dns_max_outstanding = atoi (val);
363#endif
364 }
365 else if (!strcmp (var, "http-proxy-host"))
366 {
367#if ENABLE_HTTP_PROXY
368 free (conf.proxy_host), conf.proxy_host = strdup (val);
369#endif
370 }
371 else if (!strcmp (var, "http-proxy-port"))
372 {
373#if ENABLE_HTTP_PROXY
374 conf.proxy_port = atoi (val);
375#endif
376 }
377 else if (!strcmp (var, "http-proxy-auth"))
378 {
379#if ENABLE_HTTP_PROXY
380 conf.proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val));
381#endif
382 }
383
384 /* node-specific, non-defaultable */
385 else if (node != &conf.default_node && !strcmp (var, "hostname"))
386 free (node->hostname), node->hostname = strdup (val);
387
388 /* node-specific, defaultable */
389 else if (!strcmp (var, "udp-port"))
390 node->udp_port = atoi (val);
391 else if (!strcmp (var, "tcp-port"))
392 node->tcp_port = atoi (val);
393 else if (!strcmp (var, "dns-hostname"))
394 {
395#if ENABLE_DNS
396 free (node->dns_hostname), node->dns_hostname = strdup (val);
397#endif
398 }
399 else if (!strcmp (var, "dns-port"))
400 {
401#if ENABLE_DNS
402 node->dns_port = atoi (val);
403#endif
404 }
405 else if (!strcmp (var, "dns-domain"))
406 {
407#if ENABLE_DNS
408 free (node->domain), node->domain = strdup (val);
409#endif
410 }
411 else if (!strcmp (var, "if-up-data"))
412 free (node->if_up_data), node->if_up_data = strdup (val);
413 else if (!strcmp (var, "router-priority"))
414 node->routerprio = atoi (val);
415 else if (!strcmp (var, "max-retry"))
416 node->max_retry = atoi (val);
417 else if (!strcmp (var, "connect"))
418 {
419 if (!strcmp (val, "ondemand"))
420 node->connectmode = conf_node::C_ONDEMAND;
421 else if (!strcmp (val, "never"))
422 node->connectmode = conf_node::C_NEVER;
423 else if (!strcmp (val, "always"))
424 node->connectmode = conf_node::C_ALWAYS;
425 else if (!strcmp (val, "disabled"))
426 node->connectmode = conf_node::C_DISABLED;
427 else
428 return _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled'. (ignored)");
429 }
430 else if (!strcmp (var, "inherit-tos"))
431 parse_bool (node->inherit_tos, "inherit-tos", true, false);
432 else if (!strcmp (var, "compress"))
433 parse_bool (node->compress, "compress", true, false);
434 // all these bool options really really cost a lot of executable size!
435 else if (!strcmp (var, "enable-tcp"))
436 {
437#if ENABLE_TCP
438 u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v;
439#endif
440 }
441 else if (!strcmp (var, "enable-icmp"))
442 {
443#if ENABLE_ICMP
444 u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v;
445#endif
446 }
447 else if (!strcmp (var, "enable-dns"))
448 {
449#if ENABLE_DNS
450 u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) | v;
451#endif
452 }
453 else if (!strcmp (var, "enable-udp"))
454 {
455 u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v;
456 }
457 else if (!strcmp (var, "enable-rawip"))
458 {
459 u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v;
460 }
461 else if (!strcmp (var, "allow-direct"))
462 node->allow_direct.push_back (strdup (val));
463 else if (!strcmp (var, "deny-direct"))
464 node->deny_direct.push_back (strdup (val));
465
466 // unknown or misplaced
467 else
468 return _("unknown configuration directive. (ignored)");
469
470 return 0;
471}
472
473void configuration_parser::parse_argv ()
474{
475 for (int i = 0; i < argc; ++i)
476 {
477 char *v = argv [i];
478
479 if (!*v)
480 continue;
481
482 char *enode = v;
483
484 while (*enode != '.' && *enode > ' ' && *enode != '=' && *enode)
485 enode++;
486
487 if (*enode != '.')
488 enode = 0;
489
490 char *wnode = node == &conf.default_node
491 ? 0
492 : node->nodename;
493
494 if ((!wnode && !enode)
495 || (wnode && enode && !strncmp (wnode, v, enode - v)))
496 {
497 const char *warn = parse_line (enode ? enode + 1 : v);
498
499 if (warn)
500 slog (L_WARN, _("%s, while parsing command line option '%s'."), warn, v);
501
502 *v = 0;
503 }
504 }
505}
506
507configuration_parser::configuration_parser (configuration &conf,
508 bool need_keys,
509 int argc,
510 char **argv)
511: conf (conf),need_keys (need_keys), argc (argc), argv (argv)
512{
513 char *fname;
514 FILE *f;
515
516 conf.clear ();
517
518 asprintf (&fname, "%s/gvpe.conf", confbase);
519 f = fopen (fname, "r");
520
521 if (f)
522 {
523 char line[16384];
524 int lineno = 0;
525 node = &conf.default_node;
526
527 while (fgets (line, sizeof (line), f))
528 {
529 lineno++;
530
531 const char *warn = parse_line (line);
532
533 if (warn)
534 slog (L_WARN, _("%s, at '%s', line %d."), warn, fname, lineno);
535 }
536
537 fclose (f);
538
539 parse_argv ();
540 }
541 else
542 {
543 slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
544 exit (EXIT_FAILURE);
545 }
546
547 free (fname);
548
549 fname = conf.config_filename (conf.prikeyfile, "hostkey");
550
551 f = fopen (fname, "r");
552 if (f)
553 {
554 conf.rsa_key = RSA_new ();
555
556 if (!PEM_read_RSAPrivateKey (f, &conf.rsa_key, NULL, NULL))
557 {
558 ERR_load_RSA_strings (); ERR_load_PEM_strings ();
559 slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
560 exit (EXIT_FAILURE);
561 }
562
563 require (RSA_blinding_on (conf.rsa_key, 0));
564
565 fclose (f);
566 }
567 else
568 {
569 slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
570
571 if (need_keys)
572 exit (EXIT_FAILURE);
573 }
574
575 if (need_keys && ::thisnode
576 && conf.rsa_key && conf.thisnode && conf.thisnode->rsa_key)
577 if (BN_cmp (conf.rsa_key->n, conf.thisnode->rsa_key->n) != 0
578 || BN_cmp (conf.rsa_key->e, conf.thisnode->rsa_key->e) != 0)
579 {
580 slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
581 exit (EXIT_FAILURE);
582 }
583
584 free (fname);
585}
586
587char *configuration::config_filename (const char *name, const char *dflt)
588{
589 char *fname;
590
591 asprintf (&fname, name ? name : dflt, ::thisnode);
592
593 if (!ABSOLUTE_PATH (fname))
594 {
595 char *rname = fname;
596 asprintf (&fname, "%s/%s", confbase, rname);
597 free (rname);
598 }
599
600 return fname;
601}
602
603void
604configuration::print ()
605{
606 printf (_("\nConfiguration\n\n"));
607 printf (_("# of nodes: %d\n"), nodes.size ());
608 printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
609 printf (_("MTU: %d\n"), mtu);
610 printf (_("rekeying interval: %d\n"), rekey);
611 printf (_("keepalive interval: %d\n"), keepalive);
612 printf (_("interface: %s\n"), ifname);
613 printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
614 printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
615 printf ("\n");
616
617 printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
618 _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
619
620 for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
621 (*i)->print ();
622
623 printf ("\n");
624}
625
626configuration::configuration ()
627{
628 asprintf (&confbase, "%s/gvpe", CONFDIR);
629
630 init ();
631}
632
633configuration::~configuration ()
634{
635 cleanup ();
636}
637
638

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