1 |
pcg |
1.1 |
/* |
2 |
|
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conf.c -- configuration code |
3 |
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Copyright (C) 1998 Robert van der Meulen |
4 |
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1998-2002 Ivo Timmermans <ivo@o2w.nl> |
5 |
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2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
6 |
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2000 Cris van Pelt <tribbel@arise.dhs.org> |
7 |
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2003 Marc Lehmann <pcg@goof.com> |
8 |
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9 |
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This program is free software; you can redistribute it and/or modify |
10 |
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it under the terms of the GNU General Public License as published by |
11 |
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the Free Software Foundation; either version 2 of the License, or |
12 |
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(at your option) any later version. |
13 |
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14 |
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This program is distributed in the hope that it will be useful, |
15 |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 |
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GNU General Public License for more details. |
18 |
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19 |
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You should have received a copy of the GNU General Public License |
20 |
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along with this program; if not, write to the Free Software |
21 |
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Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
22 |
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*/ |
23 |
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24 |
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#include "config.h" |
25 |
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|
26 |
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#include <cstdio> |
27 |
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#include <cstdlib> |
28 |
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#include <cstring> |
29 |
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30 |
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#include <errno.h> |
31 |
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#include <netdb.h> |
32 |
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#include <sys/stat.h> |
33 |
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#include <sys/types.h> |
34 |
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#include <unistd.h> |
35 |
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|
36 |
pcg |
1.5 |
#include <netinet/in.h> |
37 |
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|
38 |
pcg |
1.1 |
#include <openssl/err.h> |
39 |
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#include <openssl/pem.h> |
40 |
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#include <openssl/rsa.h> |
41 |
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#include <openssl/rand.h> |
42 |
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43 |
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#include "gettext.h" |
44 |
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45 |
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#include "conf.h" |
46 |
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#include "slog.h" |
47 |
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#include "util.h" |
48 |
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|
49 |
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char *confbase; |
50 |
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char *thisnode; |
51 |
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char *identname; |
52 |
|
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char *pidfilename; |
53 |
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|
|
54 |
|
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struct configuration conf; |
55 |
|
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|
56 |
pcg |
1.7 |
u8 best_protocol (u8 protset) |
57 |
|
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{ |
58 |
|
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if (protset & PROT_IPv4) |
59 |
|
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return PROT_IPv4; |
60 |
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|
61 |
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return PROT_UDPv4; |
62 |
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} |
63 |
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|
64 |
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const char *strprotocol (u8 protocol) |
65 |
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{ |
66 |
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if (protocol & PROT_IPv4 ) return "rawip"; |
67 |
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if (protocol & PROT_UDPv4) return "udp"; |
68 |
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|
69 |
|
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return "<unknown>"; |
70 |
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} |
71 |
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|
72 |
pcg |
1.1 |
configuration::configuration () |
73 |
|
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{ |
74 |
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init (); |
75 |
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} |
76 |
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|
77 |
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configuration::~configuration () |
78 |
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{ |
79 |
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cleanup (); |
80 |
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} |
81 |
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|
82 |
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void configuration::init () |
83 |
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{ |
84 |
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memset (this, 0, sizeof (*this)); |
85 |
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|
86 |
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rekey = DEFAULT_REKEY; |
87 |
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keepalive = DEFAULT_KEEPALIVE; |
88 |
pcg |
1.2 |
llevel = L_INFO; |
89 |
pcg |
1.5 |
ip_proto = IPPROTO_GRE; |
90 |
pcg |
1.1 |
|
91 |
pcg |
1.5 |
default_node.udp_port = DEFAULT_UDPPORT; |
92 |
pcg |
1.1 |
default_node.connectmode = conf_node::C_ALWAYS; |
93 |
|
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default_node.compress = true; |
94 |
pcg |
1.6 |
default_node.protocols = PROT_UDPv4; |
95 |
pcg |
1.1 |
} |
96 |
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|
97 |
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void configuration::cleanup() |
98 |
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{ |
99 |
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if (rsa_key) |
100 |
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RSA_free (rsa_key); |
101 |
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102 |
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free (ifname); |
103 |
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104 |
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rsa_key = 0; |
105 |
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ifname = 0; |
106 |
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} |
107 |
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108 |
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void |
109 |
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configuration::clear_config () |
110 |
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{ |
111 |
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for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i) |
112 |
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delete *i; |
113 |
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114 |
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nodes.clear (); |
115 |
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116 |
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cleanup (); |
117 |
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init (); |
118 |
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} |
119 |
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|
120 |
pcg |
1.5 |
#define parse_bool(target,name,trueval,falseval) \ |
121 |
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if (!strcmp (val, "yes")) target = trueval; \ |
122 |
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else if (!strcmp (val, "no")) target = falseval; \ |
123 |
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else if (!strcmp (val, "true")) target = trueval; \ |
124 |
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else if (!strcmp (val, "false")) target = falseval; \ |
125 |
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else if (!strcmp (val, "on")) target = trueval; \ |
126 |
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else if (!strcmp (val, "off")) target = falseval; \ |
127 |
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else \ |
128 |
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slog (L_WARN, \ |
129 |
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_("illegal value for '%s', only 'yes|true|on' or 'no|false|off' allowed, at '%s' line %d"), \ |
130 |
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name, var, fname, lineno); |
131 |
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|
132 |
pcg |
1.1 |
void configuration::read_config (bool need_keys) |
133 |
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{ |
134 |
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char *fname; |
135 |
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FILE *f; |
136 |
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137 |
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clear_config (); |
138 |
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|
139 |
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asprintf (&fname, "%s/vped.conf", confbase); |
140 |
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f = fopen (fname, "r"); |
141 |
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142 |
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if (f) |
143 |
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{ |
144 |
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char line[16384]; |
145 |
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int lineno = 0; |
146 |
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char *var, *val; |
147 |
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conf_node *node = &default_node; |
148 |
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149 |
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while (fgets (line, sizeof (line), f)) |
150 |
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{ |
151 |
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lineno++; |
152 |
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153 |
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{ |
154 |
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char *end = line + strlen (line); |
155 |
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156 |
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while (*end < ' ' && end >= line) |
157 |
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end--; |
158 |
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159 |
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*++end = 0; |
160 |
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} |
161 |
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162 |
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char *tok = line; |
163 |
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164 |
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retry: |
165 |
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var = strtok (tok, "\t ="); |
166 |
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tok = 0; |
167 |
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168 |
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if (!var || !var[0]) |
169 |
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continue; /* no tokens on this line */ |
170 |
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171 |
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if (var[0] == '#') |
172 |
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continue; /* comment: ignore */ |
173 |
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174 |
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val = strtok (NULL, "\t\n\r ="); |
175 |
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176 |
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if (!val || val[0] == '#') |
177 |
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{ |
178 |
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slog (L_WARN, |
179 |
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_("no value for variable `%s', at '%s' line %d"), |
180 |
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var, fname, lineno); |
181 |
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break; |
182 |
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} |
183 |
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184 |
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if (!strcmp (var, "on")) |
185 |
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{ |
186 |
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if (!::thisnode |
187 |
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|| (val[0] == '!' && strcmp (val + 1, ::thisnode)) |
188 |
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|| !strcmp (val, ::thisnode)) |
189 |
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goto retry; |
190 |
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191 |
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continue; |
192 |
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} |
193 |
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194 |
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// truly global |
195 |
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if (!strcmp (var, "loglevel")) |
196 |
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{ |
197 |
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loglevel l = string_to_loglevel (val); |
198 |
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|
199 |
|
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if (l != L_NONE) |
200 |
pcg |
1.2 |
llevel = l; |
201 |
pcg |
1.1 |
else |
202 |
|
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slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line); |
203 |
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} |
204 |
pcg |
1.5 |
else if (!strcmp (var, "ip-proto")) |
205 |
|
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ip_proto = atoi (val); |
206 |
pcg |
1.1 |
|
207 |
|
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// per config |
208 |
|
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else if (!strcmp (var, "node")) |
209 |
|
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{ |
210 |
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default_node.id++; |
211 |
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212 |
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node = new conf_node (default_node); |
213 |
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214 |
|
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nodes.push_back (node); |
215 |
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216 |
|
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node->nodename = strdup (val); |
217 |
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|
218 |
|
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{ |
219 |
|
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char *fname; |
220 |
|
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FILE *f; |
221 |
|
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222 |
|
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asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename); |
223 |
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224 |
|
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f = fopen (fname, "r"); |
225 |
|
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if (f) |
226 |
|
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{ |
227 |
|
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node->rsa_key = RSA_new (); |
228 |
|
|
|
229 |
|
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if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL)) |
230 |
|
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{ |
231 |
|
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ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
232 |
|
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slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
233 |
|
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exit (1); |
234 |
|
|
} |
235 |
|
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|
236 |
|
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RSA_blinding_on (node->rsa_key, 0); |
237 |
|
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|
238 |
|
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fclose (f); |
239 |
|
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} |
240 |
|
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else |
241 |
|
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{ |
242 |
|
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slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno)); |
243 |
|
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|
244 |
|
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if (need_keys) |
245 |
|
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exit (1); |
246 |
|
|
} |
247 |
|
|
|
248 |
|
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free (fname); |
249 |
|
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} |
250 |
|
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|
251 |
|
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if (!::thisnode || !strcmp (node->nodename, ::thisnode)) |
252 |
|
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thisnode = node; |
253 |
|
|
} |
254 |
|
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else if (!strcmp (var, "private-key")) |
255 |
|
|
prikeyfile = strdup (val); |
256 |
|
|
else if (!strcmp (var, "ifpersist")) |
257 |
|
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{ |
258 |
pcg |
1.5 |
parse_bool (ifpersist, "ifpersist", true, false); |
259 |
pcg |
1.1 |
} |
260 |
|
|
else if (!strcmp (var, "ifname")) |
261 |
|
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ifname = strdup (val); |
262 |
|
|
else if (!strcmp (var, "rekey")) |
263 |
|
|
rekey = atoi (val); |
264 |
|
|
else if (!strcmp (var, "keepalive")) |
265 |
|
|
keepalive = atoi (val); |
266 |
|
|
else if (!strcmp (var, "mtu")) |
267 |
|
|
mtu = atoi (val); |
268 |
|
|
else if (!strcmp (var, "if-up")) |
269 |
|
|
script_if_up = strdup (val); |
270 |
|
|
else if (!strcmp (var, "node-up")) |
271 |
|
|
script_node_up = strdup (val); |
272 |
|
|
else if (!strcmp (var, "node-down")) |
273 |
|
|
script_node_down = strdup (val); |
274 |
|
|
|
275 |
|
|
/* node-specific, non-defaultable */ |
276 |
|
|
else if (node != &default_node && !strcmp (var, "hostname")) |
277 |
|
|
{ |
278 |
|
|
free (node->hostname); |
279 |
|
|
node->hostname = strdup (val); |
280 |
|
|
} |
281 |
|
|
|
282 |
|
|
/* node-specific, defaultable */ |
283 |
pcg |
1.4 |
else if (!strcmp (var, "udp-port")) |
284 |
pcg |
1.5 |
node->udp_port = atoi (val); |
285 |
pcg |
1.1 |
else if (!strcmp (var, "router-priority")) |
286 |
|
|
node->routerprio = atoi (val); |
287 |
|
|
else if (!strcmp (var, "connect")) |
288 |
|
|
{ |
289 |
|
|
if (!strcmp (val, "ondemand")) |
290 |
|
|
node->connectmode = conf_node::C_ONDEMAND; |
291 |
|
|
else if (!strcmp (val, "never")) |
292 |
|
|
node->connectmode = conf_node::C_NEVER; |
293 |
|
|
else if (!strcmp (val, "always")) |
294 |
|
|
node->connectmode = conf_node::C_ALWAYS; |
295 |
pcg |
1.4 |
else if (!strcmp (val, "disabled")) |
296 |
|
|
node->connectmode = conf_node::C_DISABLED; |
297 |
pcg |
1.1 |
else |
298 |
|
|
slog (L_WARN, |
299 |
pcg |
1.4 |
_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"), |
300 |
pcg |
1.1 |
var, fname, lineno); |
301 |
|
|
} |
302 |
pcg |
1.3 |
else if (!strcmp (var, "inherit-tos")) |
303 |
|
|
{ |
304 |
pcg |
1.5 |
parse_bool (node->inherit_tos, "inherit-tos", true, false); |
305 |
pcg |
1.3 |
} |
306 |
pcg |
1.1 |
else if (!strcmp (var, "compress")) |
307 |
|
|
{ |
308 |
pcg |
1.5 |
parse_bool (node->compress, "compress", true, false); |
309 |
|
|
} |
310 |
|
|
// all these bool options really really cost a lot of executable size! |
311 |
pcg |
1.6 |
else if (!strcmp (var, "enable-udp")) |
312 |
pcg |
1.5 |
{ |
313 |
pcg |
1.6 |
u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v; |
314 |
pcg |
1.5 |
} |
315 |
pcg |
1.6 |
else if (!strcmp (var, "enable-rawip")) |
316 |
pcg |
1.5 |
{ |
317 |
pcg |
1.6 |
u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v; |
318 |
pcg |
1.1 |
} |
319 |
|
|
|
320 |
|
|
// unknown or misplaced |
321 |
|
|
else |
322 |
|
|
{ |
323 |
|
|
slog (L_WARN, |
324 |
|
|
_("unknown or misplaced variable `%s', at '%s' line %d"), |
325 |
|
|
var, fname, lineno); |
326 |
|
|
} |
327 |
|
|
} |
328 |
|
|
|
329 |
|
|
fclose (f); |
330 |
|
|
} |
331 |
|
|
else |
332 |
|
|
{ |
333 |
|
|
slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno)); |
334 |
|
|
exit (1); |
335 |
|
|
} |
336 |
|
|
|
337 |
|
|
free (fname); |
338 |
|
|
|
339 |
|
|
fname = config_filename (prikeyfile, "hostkey"); |
340 |
|
|
|
341 |
|
|
f = fopen (fname, "r"); |
342 |
|
|
if (f) |
343 |
|
|
{ |
344 |
|
|
rsa_key = RSA_new (); |
345 |
|
|
|
346 |
|
|
if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL)) |
347 |
|
|
{ |
348 |
|
|
ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
349 |
|
|
slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
350 |
|
|
exit (1); |
351 |
|
|
} |
352 |
|
|
|
353 |
|
|
RSA_blinding_on (rsa_key, 0); |
354 |
|
|
|
355 |
|
|
fclose (f); |
356 |
|
|
} |
357 |
|
|
else |
358 |
|
|
{ |
359 |
|
|
slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno)); |
360 |
|
|
|
361 |
|
|
if (need_keys) |
362 |
|
|
exit (1); |
363 |
|
|
} |
364 |
|
|
|
365 |
|
|
free (fname); |
366 |
|
|
} |
367 |
|
|
|
368 |
|
|
char *configuration::config_filename (const char *name, const char *dflt) |
369 |
|
|
{ |
370 |
|
|
char *fname; |
371 |
|
|
|
372 |
|
|
asprintf (&fname, name ? name : dflt, ::thisnode); |
373 |
|
|
|
374 |
|
|
if (!ABSOLUTE_PATH (fname)) |
375 |
|
|
{ |
376 |
|
|
char *rname = fname; |
377 |
|
|
asprintf (&fname, "%s/%s", confbase, rname); |
378 |
|
|
free (rname); |
379 |
|
|
} |
380 |
|
|
|
381 |
|
|
return fname; |
382 |
|
|
} |
383 |
|
|
|
384 |
|
|
void |
385 |
|
|
configuration::print () |
386 |
|
|
{ |
387 |
|
|
printf (_("\nConfiguration\n\n")); |
388 |
|
|
printf (_("# of nodes: %d\n"), nodes.size ()); |
389 |
|
|
printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>"); |
390 |
|
|
printf (_("MTU: %d\n"), mtu); |
391 |
|
|
printf (_("rekeying interval: %d\n"), rekey); |
392 |
|
|
printf (_("keepalive interval: %d\n"), keepalive); |
393 |
|
|
printf (_("interface: %s\n"), ifname); |
394 |
|
|
printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>"); |
395 |
|
|
printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1); |
396 |
|
|
printf ("\n"); |
397 |
|
|
|
398 |
|
|
printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", |
399 |
|
|
_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); |
400 |
|
|
|
401 |
|
|
for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i) |
402 |
|
|
(*i)->print (); |
403 |
|
|
|
404 |
|
|
printf ("\n"); |
405 |
|
|
} |
406 |
|
|
|
407 |
|
|
void |
408 |
|
|
conf_node::print () |
409 |
|
|
{ |
410 |
|
|
printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n", |
411 |
|
|
id, |
412 |
|
|
id >> 8, id & 0xff, |
413 |
|
|
compress ? 'Y' : 'N', |
414 |
|
|
connectmode == C_ONDEMAND ? "ondemand" : |
415 |
|
|
connectmode == C_NEVER ? "never" : |
416 |
|
|
connectmode == C_ALWAYS ? "always" : "", |
417 |
|
|
nodename, |
418 |
|
|
hostname ? hostname : "", |
419 |
|
|
hostname ? ":" : "", |
420 |
pcg |
1.5 |
hostname ? udp_port : 0 |
421 |
pcg |
1.1 |
); |
422 |
|
|
} |
423 |
|
|
|