1 | /* |
1 | /* |
2 | conf.c -- configuration code |
2 | conf.c -- configuration code |
3 | Copyright (C) 1998 Robert van der Meulen |
3 | Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> |
4 | 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
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5 | 2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
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6 | 2000 Cris van Pelt <tribbel@arise.dhs.org> |
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7 | 2003 Marc Lehmann <pcg@goof.com> |
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8 | |
4 | |
9 | This program is free software; you can redistribute it and/or modify |
5 | 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 |
6 | 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 |
7 | the Free Software Foundation; either version 2 of the License, or |
12 | (at your option) any later version. |
8 | (at your option) any later version. |
… | |
… | |
31 | #include <netdb.h> |
27 | #include <netdb.h> |
32 | #include <sys/stat.h> |
28 | #include <sys/stat.h> |
33 | #include <sys/types.h> |
29 | #include <sys/types.h> |
34 | #include <unistd.h> |
30 | #include <unistd.h> |
35 | |
31 | |
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32 | #include "netcompat.h" |
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33 | |
36 | #include <openssl/err.h> |
34 | #include <openssl/err.h> |
37 | #include <openssl/pem.h> |
35 | #include <openssl/pem.h> |
38 | #include <openssl/rsa.h> |
36 | #include <openssl/rsa.h> |
39 | #include <openssl/rand.h> |
37 | #include <openssl/rand.h> |
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38 | #include <openssl/bn.h> |
40 | |
39 | |
41 | #include "gettext.h" |
40 | #include "gettext.h" |
42 | |
41 | |
43 | #include "conf.h" |
42 | #include "conf.h" |
44 | #include "slog.h" |
43 | #include "slog.h" |
… | |
… | |
49 | char *identname; |
48 | char *identname; |
50 | char *pidfilename; |
49 | char *pidfilename; |
51 | |
50 | |
52 | struct configuration conf; |
51 | struct configuration conf; |
53 | |
52 | |
54 | configuration::configuration () |
53 | u8 best_protocol (u8 protset) |
55 | { |
54 | { |
56 | init (); |
55 | if (protset & PROT_IPv4 ) return PROT_IPv4; |
57 | } |
56 | if (protset & PROT_ICMPv4) return PROT_ICMPv4; |
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57 | if (protset & PROT_UDPv4 ) return PROT_UDPv4; |
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58 | if (protset & PROT_TCPv4 ) return PROT_TCPv4; |
58 | |
59 | |
59 | configuration::~configuration () |
60 | return 0; |
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61 | } |
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62 | |
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63 | const char *strprotocol (u8 protocol) |
60 | { |
64 | { |
61 | cleanup (); |
65 | if (protocol & PROT_IPv4 ) return "rawip"; |
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66 | if (protocol & PROT_ICMPv4) return "icmp"; |
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67 | if (protocol & PROT_UDPv4 ) return "udp"; |
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68 | if (protocol & PROT_TCPv4 ) return "tcp"; |
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69 | |
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70 | return "<unknown>"; |
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71 | } |
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72 | |
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73 | void |
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74 | conf_node::print () |
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75 | { |
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76 | printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n", |
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77 | id, |
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78 | id >> 8, id & 0xff, |
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79 | compress ? 'Y' : 'N', |
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80 | connectmode == C_ONDEMAND ? "ondemand" : |
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81 | connectmode == C_NEVER ? "never" : |
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82 | connectmode == C_ALWAYS ? "always" : "", |
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83 | nodename, |
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84 | hostname ? hostname : "", |
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85 | hostname ? ":" : "", |
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86 | hostname ? udp_port : 0 |
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87 | ); |
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88 | } |
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89 | |
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90 | conf_node::~conf_node () |
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91 | { |
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92 | if (rsa_key) |
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93 | RSA_free (rsa_key); |
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94 | |
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95 | free (nodename); |
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96 | free (hostname); |
62 | } |
97 | } |
63 | |
98 | |
64 | void configuration::init () |
99 | void configuration::init () |
65 | { |
100 | { |
66 | memset (this, 0, sizeof (*this)); |
101 | memset (this, 0, sizeof (*this)); |
67 | |
102 | |
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103 | mtu = DEFAULT_MTU; |
68 | rekey = DEFAULT_REKEY; |
104 | rekey = DEFAULT_REKEY; |
69 | keepalive = DEFAULT_KEEPALIVE; |
105 | keepalive = DEFAULT_KEEPALIVE; |
70 | llevel = L_INFO; |
106 | llevel = L_INFO; |
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107 | ip_proto = IPPROTO_GRE; |
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108 | #if ENABLE_ICMP |
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109 | icmp_type = ICMP_ECHOREPLY; |
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110 | #endif |
71 | |
111 | |
72 | default_node.port = DEFAULT_PORT; |
112 | default_node.udp_port = DEFAULT_UDPPORT; |
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113 | default_node.tcp_port = DEFAULT_UDPPORT; |
73 | default_node.connectmode = conf_node::C_ALWAYS; |
114 | default_node.connectmode = conf_node::C_ALWAYS; |
74 | default_node.compress = true; |
115 | default_node.compress = true; |
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116 | default_node.protocols = PROT_UDPv4; |
75 | } |
117 | } |
76 | |
118 | |
77 | void configuration::cleanup() |
119 | void configuration::cleanup() |
78 | { |
120 | { |
79 | if (rsa_key) |
121 | if (rsa_key) |
80 | RSA_free (rsa_key); |
122 | RSA_free (rsa_key); |
81 | |
123 | |
82 | free (ifname); |
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83 | |
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84 | rsa_key = 0; |
124 | rsa_key = 0; |
85 | ifname = 0; |
125 | |
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126 | free (ifname); ifname = 0; |
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127 | #if ENABLE_HTTP_PROXY |
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128 | free (proxy_host); proxy_host = 0; |
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129 | free (proxy_auth); proxy_auth = 0; |
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130 | #endif |
86 | } |
131 | } |
87 | |
132 | |
88 | void |
133 | void |
89 | configuration::clear_config () |
134 | configuration::clear_config () |
90 | { |
135 | { |
… | |
… | |
94 | nodes.clear (); |
139 | nodes.clear (); |
95 | |
140 | |
96 | cleanup (); |
141 | cleanup (); |
97 | init (); |
142 | init (); |
98 | } |
143 | } |
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144 | |
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145 | #define parse_bool(target,name,trueval,falseval) \ |
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146 | if (!strcmp (val, "yes")) target = trueval; \ |
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147 | else if (!strcmp (val, "no")) target = falseval; \ |
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148 | else if (!strcmp (val, "true")) target = trueval; \ |
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149 | else if (!strcmp (val, "false")) target = falseval; \ |
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150 | else if (!strcmp (val, "on")) target = trueval; \ |
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151 | else if (!strcmp (val, "off")) target = falseval; \ |
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152 | else \ |
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153 | slog (L_WARN, \ |
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154 | _("illegal value for '%s', only 'yes|true|on' or 'no|false|off' allowed, at '%s' line %d"), \ |
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155 | name, var, fname, lineno); |
99 | |
156 | |
100 | void configuration::read_config (bool need_keys) |
157 | void configuration::read_config (bool need_keys) |
101 | { |
158 | { |
102 | char *fname; |
159 | char *fname; |
103 | FILE *f; |
160 | FILE *f; |
… | |
… | |
167 | if (l != L_NONE) |
224 | if (l != L_NONE) |
168 | llevel = l; |
225 | llevel = l; |
169 | else |
226 | else |
170 | slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line); |
227 | slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line); |
171 | } |
228 | } |
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229 | else if (!strcmp (var, "ip-proto")) |
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230 | ip_proto = atoi (val); |
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231 | else if (!strcmp (var, "icmp-type")) |
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232 | { |
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233 | #if ENABLE_ICMP |
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234 | icmp_type = atoi (val); |
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235 | #endif |
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236 | } |
172 | |
237 | |
173 | // per config |
238 | // per config |
174 | else if (!strcmp (var, "node")) |
239 | else if (!strcmp (var, "node")) |
175 | { |
240 | { |
176 | default_node.id++; |
241 | default_node.id++; |
… | |
… | |
194 | |
259 | |
195 | if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL)) |
260 | if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL)) |
196 | { |
261 | { |
197 | ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
262 | ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
198 | slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
263 | slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
199 | exit (1); |
264 | exit (EXIT_FAILURE); |
200 | } |
265 | } |
201 | |
266 | |
202 | RSA_blinding_on (node->rsa_key, 0); |
267 | require (RSA_blinding_on (node->rsa_key, 0)); |
203 | |
268 | |
204 | fclose (f); |
269 | fclose (f); |
205 | } |
270 | } |
206 | else |
271 | else |
207 | { |
272 | { |
208 | slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno)); |
273 | slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno)); |
209 | |
274 | |
210 | if (need_keys) |
275 | if (need_keys) |
211 | exit (1); |
276 | exit (EXIT_FAILURE); |
212 | } |
277 | } |
213 | |
278 | |
214 | free (fname); |
279 | free (fname); |
215 | } |
280 | } |
216 | |
281 | |
… | |
… | |
219 | } |
284 | } |
220 | else if (!strcmp (var, "private-key")) |
285 | else if (!strcmp (var, "private-key")) |
221 | prikeyfile = strdup (val); |
286 | prikeyfile = strdup (val); |
222 | else if (!strcmp (var, "ifpersist")) |
287 | else if (!strcmp (var, "ifpersist")) |
223 | { |
288 | { |
224 | if (!strcmp (val, "yes")) |
289 | parse_bool (ifpersist, "ifpersist", true, false); |
225 | ifpersist = true; |
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226 | else if (!strcmp (val, "no")) |
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227 | ifpersist = false; |
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228 | else |
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229 | slog (L_WARN, |
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230 | _("illegal value for 'ifpersist', only 'yes' or 'no' allowed, at '%s' line %d"), |
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231 | var, fname, lineno); |
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232 | } |
290 | } |
233 | else if (!strcmp (var, "ifname")) |
291 | else if (!strcmp (var, "ifname")) |
234 | ifname = strdup (val); |
292 | ifname = strdup (val); |
235 | else if (!strcmp (var, "rekey")) |
293 | else if (!strcmp (var, "rekey")) |
236 | rekey = atoi (val); |
294 | rekey = atoi (val); |
… | |
… | |
242 | script_if_up = strdup (val); |
300 | script_if_up = strdup (val); |
243 | else if (!strcmp (var, "node-up")) |
301 | else if (!strcmp (var, "node-up")) |
244 | script_node_up = strdup (val); |
302 | script_node_up = strdup (val); |
245 | else if (!strcmp (var, "node-down")) |
303 | else if (!strcmp (var, "node-down")) |
246 | script_node_down = strdup (val); |
304 | script_node_down = strdup (val); |
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305 | else if (!strcmp (var, "http-proxy-host")) |
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306 | { |
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307 | #if ENABLE_HTTP_PROXY |
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308 | proxy_host = strdup (val); |
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309 | #endif |
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310 | } |
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311 | else if (!strcmp (var, "http-proxy-port")) |
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312 | { |
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313 | #if ENABLE_HTTP_PROXY |
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314 | proxy_port = atoi (val); |
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315 | #endif |
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316 | } |
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317 | else if (!strcmp (var, "http-proxy-auth")) |
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318 | { |
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319 | #if ENABLE_HTTP_PROXY |
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320 | proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val)); |
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321 | #endif |
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322 | } |
247 | |
323 | |
248 | /* node-specific, non-defaultable */ |
324 | /* node-specific, non-defaultable */ |
249 | else if (node != &default_node && !strcmp (var, "hostname")) |
325 | else if (node != &default_node && !strcmp (var, "hostname")) |
250 | { |
326 | { |
251 | free (node->hostname); |
327 | free (node->hostname); |
252 | node->hostname = strdup (val); |
328 | node->hostname = strdup (val); |
253 | } |
329 | } |
254 | |
330 | |
255 | /* node-specific, defaultable */ |
331 | /* node-specific, defaultable */ |
256 | else if (!strcmp (var, "port")) |
332 | else if (!strcmp (var, "udp-port")) |
257 | node->port = atoi (val); |
333 | node->udp_port = atoi (val); |
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334 | else if (!strcmp (var, "tcp-port")) |
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335 | node->tcp_port = atoi (val); |
258 | else if (!strcmp (var, "router-priority")) |
336 | else if (!strcmp (var, "router-priority")) |
259 | node->routerprio = atoi (val); |
337 | node->routerprio = atoi (val); |
260 | else if (!strcmp (var, "connect")) |
338 | else if (!strcmp (var, "connect")) |
261 | { |
339 | { |
262 | if (!strcmp (val, "ondemand")) |
340 | if (!strcmp (val, "ondemand")) |
263 | node->connectmode = conf_node::C_ONDEMAND; |
341 | node->connectmode = conf_node::C_ONDEMAND; |
264 | else if (!strcmp (val, "never")) |
342 | else if (!strcmp (val, "never")) |
265 | node->connectmode = conf_node::C_NEVER; |
343 | node->connectmode = conf_node::C_NEVER; |
266 | else if (!strcmp (val, "always")) |
344 | else if (!strcmp (val, "always")) |
267 | node->connectmode = conf_node::C_ALWAYS; |
345 | node->connectmode = conf_node::C_ALWAYS; |
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346 | else if (!strcmp (val, "disabled")) |
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347 | node->connectmode = conf_node::C_DISABLED; |
268 | else |
348 | else |
269 | slog (L_WARN, |
349 | slog (L_WARN, |
270 | _("illegal value for 'connectmode', use one of 'ondemand', 'never' or 'always', at '%s' line %d"), |
350 | _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"), |
271 | var, fname, lineno); |
351 | var, fname, lineno); |
272 | } |
352 | } |
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353 | else if (!strcmp (var, "inherit-tos")) |
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354 | { |
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355 | parse_bool (node->inherit_tos, "inherit-tos", true, false); |
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356 | } |
273 | else if (!strcmp (var, "compress")) |
357 | else if (!strcmp (var, "compress")) |
274 | { |
358 | { |
275 | if (!strcmp (val, "yes")) |
359 | parse_bool (node->compress, "compress", true, false); |
276 | node->compress = true; |
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277 | else if (!strcmp (val, "no")) |
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278 | node->compress = false; |
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279 | else |
360 | } |
280 | slog (L_WARN, |
361 | // all these bool options really really cost a lot of executable size! |
281 | _("illegal value for 'compress', only 'yes' or 'no' allowed, at '%s' line %d"), |
362 | else if (!strcmp (var, "enable-tcp")) |
282 | var, fname, lineno); |
363 | { |
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364 | #if ENABLE_TCP |
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365 | u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v; |
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366 | #endif |
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367 | } |
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368 | else if (!strcmp (var, "enable-icmp")) |
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369 | { |
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370 | #if ENABLE_ICMP |
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371 | u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v; |
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372 | #endif |
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373 | } |
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374 | else if (!strcmp (var, "enable-udp")) |
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375 | { |
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376 | u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v; |
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377 | } |
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378 | else if (!strcmp (var, "enable-rawip")) |
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379 | { |
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380 | u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v; |
283 | } |
381 | } |
284 | |
382 | |
285 | // unknown or misplaced |
383 | // unknown or misplaced |
286 | else |
384 | else |
287 | { |
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288 | slog (L_WARN, |
385 | slog (L_WARN, |
289 | _("unknown or misplaced variable `%s', at '%s' line %d"), |
386 | _("unknown or misplaced variable `%s', at '%s' line %d"), |
290 | var, fname, lineno); |
387 | var, fname, lineno); |
291 | } |
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292 | } |
388 | } |
293 | |
389 | |
294 | fclose (f); |
390 | fclose (f); |
295 | } |
391 | } |
296 | else |
392 | else |
297 | { |
393 | { |
298 | slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno)); |
394 | slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno)); |
299 | exit (1); |
395 | exit (EXIT_FAILURE); |
300 | } |
396 | } |
301 | |
397 | |
302 | free (fname); |
398 | free (fname); |
303 | |
399 | |
304 | fname = config_filename (prikeyfile, "hostkey"); |
400 | fname = config_filename (prikeyfile, "hostkey"); |
… | |
… | |
310 | |
406 | |
311 | if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL)) |
407 | if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL)) |
312 | { |
408 | { |
313 | ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
409 | ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
314 | slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
410 | slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
315 | exit (1); |
411 | exit (EXIT_FAILURE); |
316 | } |
412 | } |
317 | |
413 | |
318 | RSA_blinding_on (rsa_key, 0); |
414 | require (RSA_blinding_on (rsa_key, 0)); |
319 | |
415 | |
320 | fclose (f); |
416 | fclose (f); |
321 | } |
417 | } |
322 | else |
418 | else |
323 | { |
419 | { |
324 | slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno)); |
420 | slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno)); |
325 | |
421 | |
326 | if (need_keys) |
422 | if (need_keys) |
327 | exit (1); |
423 | exit (EXIT_FAILURE); |
328 | } |
424 | } |
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425 | |
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426 | if (need_keys && rsa_key && thisnode && thisnode->rsa_key) |
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427 | if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0 |
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428 | || BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0) |
|
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429 | { |
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430 | slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode); |
|
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431 | exit (EXIT_FAILURE); |
|
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432 | } |
329 | |
433 | |
330 | free (fname); |
434 | free (fname); |
331 | } |
435 | } |
332 | |
436 | |
333 | char *configuration::config_filename (const char *name, const char *dflt) |
437 | char *configuration::config_filename (const char *name, const char *dflt) |
… | |
… | |
355 | printf (_("MTU: %d\n"), mtu); |
459 | printf (_("MTU: %d\n"), mtu); |
356 | printf (_("rekeying interval: %d\n"), rekey); |
460 | printf (_("rekeying interval: %d\n"), rekey); |
357 | printf (_("keepalive interval: %d\n"), keepalive); |
461 | printf (_("keepalive interval: %d\n"), keepalive); |
358 | printf (_("interface: %s\n"), ifname); |
462 | printf (_("interface: %s\n"), ifname); |
359 | printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>"); |
463 | printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>"); |
360 | printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1); |
464 | printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1); |
361 | printf ("\n"); |
465 | printf ("\n"); |
362 | |
466 | |
363 | printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", |
467 | printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", |
364 | _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); |
468 | _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); |
365 | |
469 | |
… | |
… | |
367 | (*i)->print (); |
471 | (*i)->print (); |
368 | |
472 | |
369 | printf ("\n"); |
473 | printf ("\n"); |
370 | } |
474 | } |
371 | |
475 | |
372 | void |
476 | configuration::configuration () |
373 | conf_node::print () |
|
|
374 | { |
477 | { |
375 | printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n", |
478 | init (); |
376 | id, |
|
|
377 | id >> 8, id & 0xff, |
|
|
378 | compress ? 'Y' : 'N', |
|
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379 | connectmode == C_ONDEMAND ? "ondemand" : |
|
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380 | connectmode == C_NEVER ? "never" : |
|
|
381 | connectmode == C_ALWAYS ? "always" : "", |
|
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382 | nodename, |
|
|
383 | hostname ? hostname : "", |
|
|
384 | hostname ? ":" : "", |
|
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385 | hostname ? port : 0 |
|
|
386 | ); |
|
|
387 | } |
479 | } |
388 | |
480 | |
|
|
481 | configuration::~configuration () |
|
|
482 | { |
|
|
483 | cleanup (); |
|
|
484 | } |
|
|
485 | |
|
|
486 | |