| 1 |
/* |
| 2 |
conf.c -- configuration code |
| 3 |
Copyright (C) 1998 Robert van der Meulen |
| 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 |
|
| 9 |
This program is free software; you can redistribute it and/or modify |
| 10 |
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 |
| 12 |
(at your option) any later version. |
| 13 |
|
| 14 |
This program is distributed in the hope that it will be useful, |
| 15 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 |
GNU General Public License for more details. |
| 18 |
|
| 19 |
You should have received a copy of the GNU General Public License |
| 20 |
along with this program; if not, write to the Free Software |
| 21 |
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 |
*/ |
| 23 |
|
| 24 |
#include "config.h" |
| 25 |
|
| 26 |
#include <cstdio> |
| 27 |
#include <cstdlib> |
| 28 |
#include <cstring> |
| 29 |
|
| 30 |
#include <errno.h> |
| 31 |
#include <netdb.h> |
| 32 |
#include <sys/stat.h> |
| 33 |
#include <sys/types.h> |
| 34 |
#include <unistd.h> |
| 35 |
|
| 36 |
#include "netcompat.h" |
| 37 |
|
| 38 |
#include <openssl/err.h> |
| 39 |
#include <openssl/pem.h> |
| 40 |
#include <openssl/rsa.h> |
| 41 |
#include <openssl/rand.h> |
| 42 |
|
| 43 |
#include "gettext.h" |
| 44 |
|
| 45 |
#include "conf.h" |
| 46 |
#include "slog.h" |
| 47 |
#include "util.h" |
| 48 |
|
| 49 |
char *confbase; |
| 50 |
char *thisnode; |
| 51 |
char *identname; |
| 52 |
char *pidfilename; |
| 53 |
|
| 54 |
struct configuration conf; |
| 55 |
|
| 56 |
u8 best_protocol (u8 protset) |
| 57 |
{ |
| 58 |
if (protset & PROT_IPv4 ) return PROT_IPv4; |
| 59 |
if (protset & PROT_ICMPv4) return PROT_ICMPv4; |
| 60 |
if (protset & PROT_UDPv4 ) return PROT_UDPv4; |
| 61 |
if (protset & PROT_TCPv4 ) return PROT_TCPv4; |
| 62 |
|
| 63 |
return 0; |
| 64 |
} |
| 65 |
|
| 66 |
const char *strprotocol (u8 protocol) |
| 67 |
{ |
| 68 |
if (protocol & PROT_IPv4 ) return "rawip"; |
| 69 |
if (protocol & PROT_ICMPv4) return "icmp"; |
| 70 |
if (protocol & PROT_UDPv4 ) return "udp"; |
| 71 |
if (protocol & PROT_TCPv4 ) return "tcp"; |
| 72 |
|
| 73 |
return "<unknown>"; |
| 74 |
} |
| 75 |
|
| 76 |
void |
| 77 |
conf_node::print () |
| 78 |
{ |
| 79 |
printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n", |
| 80 |
id, |
| 81 |
id >> 8, id & 0xff, |
| 82 |
compress ? 'Y' : 'N', |
| 83 |
connectmode == C_ONDEMAND ? "ondemand" : |
| 84 |
connectmode == C_NEVER ? "never" : |
| 85 |
connectmode == C_ALWAYS ? "always" : "", |
| 86 |
nodename, |
| 87 |
hostname ? hostname : "", |
| 88 |
hostname ? ":" : "", |
| 89 |
hostname ? udp_port : 0 |
| 90 |
); |
| 91 |
} |
| 92 |
|
| 93 |
conf_node::~conf_node () |
| 94 |
{ |
| 95 |
if (rsa_key) |
| 96 |
RSA_free (rsa_key); |
| 97 |
|
| 98 |
free (nodename); |
| 99 |
free (hostname); |
| 100 |
} |
| 101 |
|
| 102 |
void configuration::init () |
| 103 |
{ |
| 104 |
memset (this, 0, sizeof (*this)); |
| 105 |
|
| 106 |
rekey = DEFAULT_REKEY; |
| 107 |
keepalive = DEFAULT_KEEPALIVE; |
| 108 |
llevel = L_INFO; |
| 109 |
ip_proto = IPPROTO_GRE; |
| 110 |
#if ENABLE_ICMP |
| 111 |
icmp_type = ICMP_ECHOREPLY; |
| 112 |
#endif |
| 113 |
|
| 114 |
default_node.udp_port = DEFAULT_UDPPORT; |
| 115 |
default_node.tcp_port = DEFAULT_UDPPORT; |
| 116 |
default_node.connectmode = conf_node::C_ALWAYS; |
| 117 |
default_node.compress = true; |
| 118 |
default_node.protocols = PROT_UDPv4; |
| 119 |
} |
| 120 |
|
| 121 |
void configuration::cleanup() |
| 122 |
{ |
| 123 |
if (rsa_key) |
| 124 |
RSA_free (rsa_key); |
| 125 |
|
| 126 |
rsa_key = 0; |
| 127 |
|
| 128 |
free (ifname); ifname = 0; |
| 129 |
#if ENABLE_HTTP_PROXY |
| 130 |
free (proxy_host); proxy_host = 0; |
| 131 |
free (proxy_auth); proxy_auth = 0; |
| 132 |
#endif |
| 133 |
} |
| 134 |
|
| 135 |
void |
| 136 |
configuration::clear_config () |
| 137 |
{ |
| 138 |
for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i) |
| 139 |
delete *i; |
| 140 |
|
| 141 |
nodes.clear (); |
| 142 |
|
| 143 |
cleanup (); |
| 144 |
init (); |
| 145 |
} |
| 146 |
|
| 147 |
#define parse_bool(target,name,trueval,falseval) \ |
| 148 |
if (!strcmp (val, "yes")) target = trueval; \ |
| 149 |
else if (!strcmp (val, "no")) target = falseval; \ |
| 150 |
else if (!strcmp (val, "true")) target = trueval; \ |
| 151 |
else if (!strcmp (val, "false")) target = falseval; \ |
| 152 |
else if (!strcmp (val, "on")) target = trueval; \ |
| 153 |
else if (!strcmp (val, "off")) target = falseval; \ |
| 154 |
else \ |
| 155 |
slog (L_WARN, \ |
| 156 |
_("illegal value for '%s', only 'yes|true|on' or 'no|false|off' allowed, at '%s' line %d"), \ |
| 157 |
name, var, fname, lineno); |
| 158 |
|
| 159 |
void configuration::read_config (bool need_keys) |
| 160 |
{ |
| 161 |
char *fname; |
| 162 |
FILE *f; |
| 163 |
|
| 164 |
clear_config (); |
| 165 |
|
| 166 |
asprintf (&fname, "%s/vped.conf", confbase); |
| 167 |
f = fopen (fname, "r"); |
| 168 |
|
| 169 |
if (f) |
| 170 |
{ |
| 171 |
char line[16384]; |
| 172 |
int lineno = 0; |
| 173 |
char *var, *val; |
| 174 |
conf_node *node = &default_node; |
| 175 |
|
| 176 |
while (fgets (line, sizeof (line), f)) |
| 177 |
{ |
| 178 |
lineno++; |
| 179 |
|
| 180 |
{ |
| 181 |
char *end = line + strlen (line); |
| 182 |
|
| 183 |
while (*end < ' ' && end >= line) |
| 184 |
end--; |
| 185 |
|
| 186 |
*++end = 0; |
| 187 |
} |
| 188 |
|
| 189 |
char *tok = line; |
| 190 |
|
| 191 |
retry: |
| 192 |
var = strtok (tok, "\t ="); |
| 193 |
tok = 0; |
| 194 |
|
| 195 |
if (!var || !var[0]) |
| 196 |
continue; /* no tokens on this line */ |
| 197 |
|
| 198 |
if (var[0] == '#') |
| 199 |
continue; /* comment: ignore */ |
| 200 |
|
| 201 |
val = strtok (NULL, "\t\n\r ="); |
| 202 |
|
| 203 |
if (!val || val[0] == '#') |
| 204 |
{ |
| 205 |
slog (L_WARN, |
| 206 |
_("no value for variable `%s', at '%s' line %d"), |
| 207 |
var, fname, lineno); |
| 208 |
break; |
| 209 |
} |
| 210 |
|
| 211 |
if (!strcmp (var, "on")) |
| 212 |
{ |
| 213 |
if (!::thisnode |
| 214 |
|| (val[0] == '!' && strcmp (val + 1, ::thisnode)) |
| 215 |
|| !strcmp (val, ::thisnode)) |
| 216 |
goto retry; |
| 217 |
|
| 218 |
continue; |
| 219 |
} |
| 220 |
|
| 221 |
// truly global |
| 222 |
if (!strcmp (var, "loglevel")) |
| 223 |
{ |
| 224 |
loglevel l = string_to_loglevel (val); |
| 225 |
|
| 226 |
if (l != L_NONE) |
| 227 |
llevel = l; |
| 228 |
else |
| 229 |
slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line); |
| 230 |
} |
| 231 |
else if (!strcmp (var, "ip-proto")) |
| 232 |
ip_proto = atoi (val); |
| 233 |
#if ENABLE_ICMP |
| 234 |
//TODO: error message |
| 235 |
else if (!strcmp (var, "icmp-type")) |
| 236 |
icmp_type = atoi (val); |
| 237 |
#endif |
| 238 |
|
| 239 |
// per config |
| 240 |
else if (!strcmp (var, "node")) |
| 241 |
{ |
| 242 |
default_node.id++; |
| 243 |
|
| 244 |
node = new conf_node (default_node); |
| 245 |
|
| 246 |
nodes.push_back (node); |
| 247 |
|
| 248 |
node->nodename = strdup (val); |
| 249 |
|
| 250 |
{ |
| 251 |
char *fname; |
| 252 |
FILE *f; |
| 253 |
|
| 254 |
asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename); |
| 255 |
|
| 256 |
f = fopen (fname, "r"); |
| 257 |
if (f) |
| 258 |
{ |
| 259 |
node->rsa_key = RSA_new (); |
| 260 |
|
| 261 |
if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL)) |
| 262 |
{ |
| 263 |
ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
| 264 |
slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
| 265 |
exit (1); |
| 266 |
} |
| 267 |
|
| 268 |
RSA_blinding_on (node->rsa_key, 0); |
| 269 |
|
| 270 |
fclose (f); |
| 271 |
} |
| 272 |
else |
| 273 |
{ |
| 274 |
slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno)); |
| 275 |
|
| 276 |
if (need_keys) |
| 277 |
exit (1); |
| 278 |
} |
| 279 |
|
| 280 |
free (fname); |
| 281 |
} |
| 282 |
|
| 283 |
if (!::thisnode || !strcmp (node->nodename, ::thisnode)) |
| 284 |
thisnode = node; |
| 285 |
} |
| 286 |
else if (!strcmp (var, "private-key")) |
| 287 |
prikeyfile = strdup (val); |
| 288 |
else if (!strcmp (var, "ifpersist")) |
| 289 |
{ |
| 290 |
parse_bool (ifpersist, "ifpersist", true, false); |
| 291 |
} |
| 292 |
else if (!strcmp (var, "ifname")) |
| 293 |
ifname = strdup (val); |
| 294 |
else if (!strcmp (var, "rekey")) |
| 295 |
rekey = atoi (val); |
| 296 |
else if (!strcmp (var, "keepalive")) |
| 297 |
keepalive = atoi (val); |
| 298 |
else if (!strcmp (var, "mtu")) |
| 299 |
mtu = atoi (val); |
| 300 |
else if (!strcmp (var, "if-up")) |
| 301 |
script_if_up = strdup (val); |
| 302 |
else if (!strcmp (var, "node-up")) |
| 303 |
script_node_up = strdup (val); |
| 304 |
else if (!strcmp (var, "node-down")) |
| 305 |
script_node_down = strdup (val); |
| 306 |
#if ENABLE_HTTP_PROXY |
| 307 |
else if (!strcmp (var, "http-proxy-host")) |
| 308 |
proxy_host = strdup (val); |
| 309 |
else if (!strcmp (var, "http-proxy-port")) |
| 310 |
proxy_port = atoi (val); |
| 311 |
else if (!strcmp (var, "http-proxy-auth")) |
| 312 |
proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val)); |
| 313 |
#endif |
| 314 |
|
| 315 |
/* node-specific, non-defaultable */ |
| 316 |
else if (node != &default_node && !strcmp (var, "hostname")) |
| 317 |
{ |
| 318 |
free (node->hostname); |
| 319 |
node->hostname = strdup (val); |
| 320 |
} |
| 321 |
|
| 322 |
/* node-specific, defaultable */ |
| 323 |
else if (!strcmp (var, "udp-port")) |
| 324 |
node->udp_port = atoi (val); |
| 325 |
else if (!strcmp (var, "tcp-port")) |
| 326 |
node->tcp_port = atoi (val); |
| 327 |
else if (!strcmp (var, "router-priority")) |
| 328 |
node->routerprio = atoi (val); |
| 329 |
else if (!strcmp (var, "connect")) |
| 330 |
{ |
| 331 |
if (!strcmp (val, "ondemand")) |
| 332 |
node->connectmode = conf_node::C_ONDEMAND; |
| 333 |
else if (!strcmp (val, "never")) |
| 334 |
node->connectmode = conf_node::C_NEVER; |
| 335 |
else if (!strcmp (val, "always")) |
| 336 |
node->connectmode = conf_node::C_ALWAYS; |
| 337 |
else if (!strcmp (val, "disabled")) |
| 338 |
node->connectmode = conf_node::C_DISABLED; |
| 339 |
else |
| 340 |
slog (L_WARN, |
| 341 |
_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"), |
| 342 |
var, fname, lineno); |
| 343 |
} |
| 344 |
else if (!strcmp (var, "inherit-tos")) |
| 345 |
{ |
| 346 |
parse_bool (node->inherit_tos, "inherit-tos", true, false); |
| 347 |
} |
| 348 |
else if (!strcmp (var, "compress")) |
| 349 |
{ |
| 350 |
parse_bool (node->compress, "compress", true, false); |
| 351 |
} |
| 352 |
// all these bool options really really cost a lot of executable size! |
| 353 |
else if (!strcmp (var, "enable-tcp")) |
| 354 |
{ |
| 355 |
#if ENABLE_TCP |
| 356 |
u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v; |
| 357 |
#endif |
| 358 |
} |
| 359 |
else if (!strcmp (var, "enable-icmp")) |
| 360 |
{ |
| 361 |
#if ENABLE_ICMP |
| 362 |
u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v; |
| 363 |
#endif |
| 364 |
} |
| 365 |
else if (!strcmp (var, "enable-udp")) |
| 366 |
{ |
| 367 |
u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v; |
| 368 |
} |
| 369 |
else if (!strcmp (var, "enable-rawip")) |
| 370 |
{ |
| 371 |
u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v; |
| 372 |
} |
| 373 |
|
| 374 |
// unknown or misplaced |
| 375 |
else |
| 376 |
slog (L_WARN, |
| 377 |
_("unknown or misplaced variable `%s', at '%s' line %d"), |
| 378 |
var, fname, lineno); |
| 379 |
} |
| 380 |
|
| 381 |
fclose (f); |
| 382 |
} |
| 383 |
else |
| 384 |
{ |
| 385 |
slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno)); |
| 386 |
exit (1); |
| 387 |
} |
| 388 |
|
| 389 |
free (fname); |
| 390 |
|
| 391 |
fname = config_filename (prikeyfile, "hostkey"); |
| 392 |
|
| 393 |
f = fopen (fname, "r"); |
| 394 |
if (f) |
| 395 |
{ |
| 396 |
rsa_key = RSA_new (); |
| 397 |
|
| 398 |
if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL)) |
| 399 |
{ |
| 400 |
ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
| 401 |
slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
| 402 |
exit (1); |
| 403 |
} |
| 404 |
|
| 405 |
RSA_blinding_on (rsa_key, 0); |
| 406 |
|
| 407 |
fclose (f); |
| 408 |
} |
| 409 |
else |
| 410 |
{ |
| 411 |
slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno)); |
| 412 |
|
| 413 |
if (need_keys) |
| 414 |
exit (1); |
| 415 |
} |
| 416 |
|
| 417 |
free (fname); |
| 418 |
} |
| 419 |
|
| 420 |
char *configuration::config_filename (const char *name, const char *dflt) |
| 421 |
{ |
| 422 |
char *fname; |
| 423 |
|
| 424 |
asprintf (&fname, name ? name : dflt, ::thisnode); |
| 425 |
|
| 426 |
if (!ABSOLUTE_PATH (fname)) |
| 427 |
{ |
| 428 |
char *rname = fname; |
| 429 |
asprintf (&fname, "%s/%s", confbase, rname); |
| 430 |
free (rname); |
| 431 |
} |
| 432 |
|
| 433 |
return fname; |
| 434 |
} |
| 435 |
|
| 436 |
void |
| 437 |
configuration::print () |
| 438 |
{ |
| 439 |
printf (_("\nConfiguration\n\n")); |
| 440 |
printf (_("# of nodes: %d\n"), nodes.size ()); |
| 441 |
printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>"); |
| 442 |
printf (_("MTU: %d\n"), mtu); |
| 443 |
printf (_("rekeying interval: %d\n"), rekey); |
| 444 |
printf (_("keepalive interval: %d\n"), keepalive); |
| 445 |
printf (_("interface: %s\n"), ifname); |
| 446 |
printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>"); |
| 447 |
printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1); |
| 448 |
printf ("\n"); |
| 449 |
|
| 450 |
printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", |
| 451 |
_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); |
| 452 |
|
| 453 |
for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i) |
| 454 |
(*i)->print (); |
| 455 |
|
| 456 |
printf ("\n"); |
| 457 |
} |
| 458 |
|
| 459 |
configuration::configuration () |
| 460 |
{ |
| 461 |
init (); |
| 462 |
} |
| 463 |
|
| 464 |
configuration::~configuration () |
| 465 |
{ |
| 466 |
cleanup (); |
| 467 |
} |
| 468 |
|
| 469 |
|
