gvpe/src/conf.C

/*
    conf.c -- configuration code
    Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com>
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "config.h"

#include <cstdio>
#include <cstdlib>
#include <cstring>

#include <errno.h>
#include <netdb.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "netcompat.h"

#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#include <openssl/rand.h>
#include <openssl/bn.h>

#include "gettext.h"

#include "conf.h"
#include "slog.h"
#include "util.h"

char *confbase;
char *thisnode;
char *identname;
char *pidfilename;

struct configuration conf;

u8 best_protocol (u8 protset)
{
  if (protset & PROT_IPv4  ) return PROT_IPv4;
  if (protset & PROT_ICMPv4) return PROT_ICMPv4;
  if (protset & PROT_UDPv4 ) return PROT_UDPv4;
  if (protset & PROT_TCPv4 ) return PROT_TCPv4;

  return 0;
}

const char *strprotocol (u8 protocol)
{
  if (protocol & PROT_IPv4  ) return "rawip";
  if (protocol & PROT_ICMPv4) return "icmp";
  if (protocol & PROT_UDPv4 ) return "udp";
  if (protocol & PROT_TCPv4 ) return "tcp";

  return "<unknown>";
}

void
conf_node::print ()
{
  printf ("%4d  fe:fd:80:00:0%1x:%02x  %c  %-8.8s  %-10.10s  %s%s%d\n",
          id,
          id >> 8, id & 0xff,
          compress ? 'Y' : 'N',
          connectmode   == C_ONDEMAND ? "ondemand" :
            connectmode == C_NEVER    ? "never" :
            connectmode == C_ALWAYS   ? "always" : "",
          nodename,
          hostname ? hostname : "",
          hostname ? ":" : "",
          hostname ? udp_port : 0
          );
}

conf_node::~conf_node ()
{
  if (rsa_key)
    RSA_free (rsa_key);

  free (nodename);
  free (hostname);
}

void configuration::init ()
{
  memset (this, 0, sizeof (*this));

  mtu       = DEFAULT_MTU;
  rekey     = DEFAULT_REKEY;
  keepalive = DEFAULT_KEEPALIVE;
  llevel    = L_INFO;
  ip_proto  = IPPROTO_GRE;
#if ENABLE_ICMP
  icmp_type = ICMP_ECHOREPLY;
#endif

  default_node.udp_port    = DEFAULT_UDPPORT;
  default_node.tcp_port    = DEFAULT_UDPPORT;
  default_node.connectmode = conf_node::C_ALWAYS;
  default_node.compress    = true;
  default_node.protocols   = PROT_UDPv4;
}

void configuration::cleanup()
{
  if (rsa_key)
    RSA_free (rsa_key);

  rsa_key = 0;

  free (ifname);     ifname     = 0;
#if ENABLE_HTTP_PROXY
  free (proxy_host); proxy_host = 0;
  free (proxy_auth); proxy_auth = 0;
#endif
}

void
configuration::clear_config ()
{
  for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
    delete *i;

  nodes.clear ();

  cleanup ();
  init ();
}

#define parse_bool(target,name,trueval,falseval)                \
  if (!strcmp (val, "yes"))             target = trueval;       \
  else if (!strcmp (val, "no"))         target = falseval;      \
  else if (!strcmp (val, "true"))       target = trueval;       \
  else if (!strcmp (val, "false"))      target = falseval;      \
  else if (!strcmp (val, "on"))         target = trueval;       \
  else if (!strcmp (val, "off"))        target = falseval;      \
  else                                                          \
    slog (L_WARN,                                               \
            _("illegal value for '%s', only 'yes|true|on' or 'no|false|off' allowed, at '%s' line %d"), \
            name, var, fname, lineno);

void configuration::read_config (bool need_keys)
{
  char *fname;
  FILE *f;

  clear_config ();

  asprintf (&fname, "%s/vped.conf", confbase);
  f = fopen (fname, "r");

  if (f)
    {
      char line[16384];
      int lineno = 0;
      char *var, *val;
      conf_node *node = &default_node;

      while (fgets (line, sizeof (line), f))
        {
          lineno++;

          {
            char *end = line + strlen (line);

            while (*end < ' ' && end >= line)
              end--;

            *++end = 0;
          }

          char *tok = line;

retry:
          var = strtok (tok, "\t =");
          tok = 0;

          if (!var || !var[0])
            continue;           /* no tokens on this line */

          if (var[0] == '#')
            continue;           /* comment: ignore */

          val = strtok (NULL, "\t\n\r =");

          if (!val || val[0] == '#')
            {
              slog (L_WARN,
                      _("no value for variable `%s', at '%s' line %d"),
                      var, fname, lineno);
              break;
            }

          if (!strcmp (var, "on"))
            {
              if (!::thisnode
                  || (val[0] == '!' && strcmp (val + 1, ::thisnode))
                  || !strcmp (val, ::thisnode))
                goto retry;

              continue;
            }

          // truly global
          if (!strcmp (var, "loglevel"))
            {
              loglevel l = string_to_loglevel (val);

              if (l != L_NONE)
                llevel = l;
              else
                slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
            }
          else if (!strcmp (var, "ip-proto"))
            ip_proto = atoi (val);
          else if (!strcmp (var, "icmp-type"))
            {
#if ENABLE_ICMP
              icmp_type = atoi (val);
#endif
            }

          // per config
          else if (!strcmp (var, "node"))
            {
              default_node.id++;

              node = new conf_node (default_node);

              nodes.push_back (node);

              node->nodename = strdup (val);

              {
                char *fname;
                FILE *f;

                asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);

                f = fopen (fname, "r");
                if (f)
                  {
                    node->rsa_key = RSA_new ();

                    if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
                      {
                        ERR_load_RSA_strings (); ERR_load_PEM_strings ();
                        slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
                        exit (EXIT_FAILURE);
                      }

                    require (RSA_blinding_on (node->rsa_key, 0));

                    fclose (f);
                  }
                else
                  {
                    slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));

                    if (need_keys)
                      exit (EXIT_FAILURE);
                  }

                free (fname);
              }

              if (!::thisnode || !strcmp (node->nodename, ::thisnode))
                thisnode = node;
            }
          else if (!strcmp (var, "private-key"))
            prikeyfile = strdup (val);
          else if (!strcmp (var, "ifpersist"))
            {
              parse_bool (ifpersist, "ifpersist", true, false);
            }
          else if (!strcmp (var, "ifname"))
            ifname = strdup (val);
          else if (!strcmp (var, "rekey"))
            rekey = atoi (val);
          else if (!strcmp (var, "keepalive"))
            keepalive = atoi (val);
          else if (!strcmp (var, "mtu"))
            mtu = atoi (val);
          else if (!strcmp (var, "if-up"))
            script_if_up = strdup (val);
          else if (!strcmp (var, "node-up"))
            script_node_up = strdup (val);
          else if (!strcmp (var, "node-down"))
            script_node_down = strdup (val);
          else if (!strcmp (var, "http-proxy-host"))
            {
#if ENABLE_HTTP_PROXY
              proxy_host = strdup (val);
#endif
            }
          else if (!strcmp (var, "http-proxy-port"))
            {
#if ENABLE_HTTP_PROXY
              proxy_port = atoi (val);
#endif
            }
          else if (!strcmp (var, "http-proxy-auth"))
            {
#if ENABLE_HTTP_PROXY
              proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val));
#endif
            }

          /* node-specific, non-defaultable */
          else if (node != &default_node && !strcmp (var, "hostname"))
            {
              free (node->hostname);
              node->hostname = strdup (val);
            }

          /* node-specific, defaultable */
          else if (!strcmp (var, "udp-port"))
            node->udp_port = atoi (val);
          else if (!strcmp (var, "tcp-port"))
            node->tcp_port = atoi (val);
          else if (!strcmp (var, "router-priority"))
            node->routerprio = atoi (val);
          else if (!strcmp (var, "connect"))
            {
              if (!strcmp (val, "ondemand"))
                node->connectmode = conf_node::C_ONDEMAND;
              else if (!strcmp (val, "never"))
                node->connectmode = conf_node::C_NEVER;
              else if (!strcmp (val, "always"))
                node->connectmode = conf_node::C_ALWAYS;
              else if (!strcmp (val, "disabled"))
                node->connectmode = conf_node::C_DISABLED;
              else
                slog (L_WARN,
                        _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
                        var, fname, lineno);
            }
          else if (!strcmp (var, "inherit-tos"))
            {
              parse_bool (node->inherit_tos, "inherit-tos", true, false);
            }
          else if (!strcmp (var, "compress"))
            {
              parse_bool (node->compress, "compress", true, false);
            }
          // all these bool options really really cost a lot of executable size!
          else if (!strcmp (var, "enable-tcp"))
            {
#if ENABLE_TCP
              u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v;
#endif
            }
          else if (!strcmp (var, "enable-icmp"))
            {
#if ENABLE_ICMP
              u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v;
#endif
            }
          else if (!strcmp (var, "enable-udp"))
            {
              u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v;
            }
          else if (!strcmp (var, "enable-rawip"))
            {
              u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v;
            }

          // unknown or misplaced
          else
            slog (L_WARN,
                    _("unknown or misplaced variable `%s', at '%s' line %d"),
                    var, fname, lineno);
        }

      fclose (f);
    }
  else
    {
      slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
      exit (EXIT_FAILURE);
    }

  free (fname);

  fname = config_filename (prikeyfile, "hostkey");

  f = fopen (fname, "r");
  if (f)
    {
      rsa_key = RSA_new ();

      if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
        {
          ERR_load_RSA_strings (); ERR_load_PEM_strings ();
          slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
          exit (EXIT_FAILURE);
        }

      require (RSA_blinding_on (rsa_key, 0));

      fclose (f);
    }
  else
    {
      slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));

      if (need_keys)
        exit (EXIT_FAILURE);
    }

  if (need_keys && rsa_key && thisnode && thisnode->rsa_key)
    if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0
        || BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0)
      {
        slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
        exit (EXIT_FAILURE);
      }

  free (fname);
}

char *configuration::config_filename (const char *name, const char *dflt)
{
  char *fname;

  asprintf (&fname, name ? name : dflt, ::thisnode);

  if (!ABSOLUTE_PATH (fname))
    {
      char *rname = fname;
      asprintf (&fname, "%s/%s", confbase, rname);
      free (rname);
    }

  return fname;
}

void
configuration::print ()
{
  printf (_("\nConfiguration\n\n"));
  printf (_("# of nodes:         %d\n"), nodes.size ());
  printf (_("this node:          %s\n"), thisnode ? thisnode->nodename : "<unset>");
  printf (_("MTU:                %d\n"), mtu);
  printf (_("rekeying interval:  %d\n"), rekey);
  printf (_("keepalive interval: %d\n"), keepalive);
  printf (_("interface:          %s\n"), ifname);
  printf (_("primary rsa key:    %s\n"), prikeyfile ? prikeyfile : "<default>");
  printf (_("rsa key size:       %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
  printf ("\n");

  printf ("%4s  %-17s %s %-8.8s  %-10.10s  %s\n",
          _("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));

  for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
    (*i)->print ();

  printf ("\n");
}

configuration::configuration ()
{
  init ();
}

configuration::~configuration ()
{
  cleanup ();
}


Revision:	1.22
Committed:	Thu Jan 29 18:55:10 2004 UTC (20 years, 3 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.21:	+16 -7 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2			conf.c -- configuration code
3	pcg	1.21	Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com>
4	pcg	1.1
5			This program is free software; you can redistribute it and/or modify
6			it under the terms of the GNU General Public License as published by
7			the Free Software Foundation; either version 2 of the License, or
8			(at your option) any later version.
9
10			This program is distributed in the hope that it will be useful,
11			but WITHOUT ANY WARRANTY; without even the implied warranty of
12			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13			GNU General Public License for more details.
14
15			You should have received a copy of the GNU General Public License
16			along with this program; if not, write to the Free Software
17			Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18			*/
19
20			#include "config.h"
21
22			#include <cstdio>
23			#include <cstdlib>
24			#include <cstring>
25
26			#include <errno.h>
27			#include <netdb.h>
28			#include <sys/stat.h>
29			#include <sys/types.h>
30			#include <unistd.h>
31
32	pcg	1.17	#include "netcompat.h"
33	pcg	1.5
34	pcg	1.1	#include <openssl/err.h>
35			#include <openssl/pem.h>
36			#include <openssl/rsa.h>
37			#include <openssl/rand.h>
38	pcg	1.22	#include <openssl/bn.h>
39	pcg	1.1
40			#include "gettext.h"
41
42			#include "conf.h"
43			#include "slog.h"
44			#include "util.h"
45
46			char *confbase;
47			char *thisnode;
48			char *identname;
49			char *pidfilename;
50
51			struct configuration conf;
52
53	pcg	1.7	u8 best_protocol (u8 protset)
54			{
55	pcg	1.13	if (protset & PROT_IPv4 ) return PROT_IPv4;
56			if (protset & PROT_ICMPv4) return PROT_ICMPv4;
57			if (protset & PROT_UDPv4 ) return PROT_UDPv4;
58			if (protset & PROT_TCPv4 ) return PROT_TCPv4;
59	pcg	1.7
60	pcg	1.9	return 0;
61	pcg	1.7	}
62
63			const char *strprotocol (u8 protocol)
64			{
65	pcg	1.13	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	pcg	1.7
70			return "<unknown>";
71			}
72
73	pcg	1.12	void
74			conf_node::print ()
75	pcg	1.1	{
76	pcg	1.12	printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n",
77			id,
78			id >> 8, id & 0xff,
79			compress ? 'Y' : 'N',
80			connectmode == C_ONDEMAND ? "ondemand" :
81			connectmode == C_NEVER ? "never" :
82			connectmode == C_ALWAYS ? "always" : "",
83			nodename,
84			hostname ? hostname : "",
85			hostname ? ":" : "",
86			hostname ? udp_port : 0
87			);
88	pcg	1.1	}
89
90	pcg	1.12	conf_node::~conf_node ()
91	pcg	1.1	{
92	pcg	1.12	if (rsa_key)
93			RSA_free (rsa_key);
94
95			free (nodename);
96			free (hostname);
97	pcg	1.1	}
98
99			void configuration::init ()
100			{
101			memset (this, 0, sizeof (*this));
102
103	pcg	1.19	mtu = DEFAULT_MTU;
104	pcg	1.1	rekey = DEFAULT_REKEY;
105			keepalive = DEFAULT_KEEPALIVE;
106	pcg	1.2	llevel = L_INFO;
107	pcg	1.5	ip_proto = IPPROTO_GRE;
108	pcg	1.16	#if ENABLE_ICMP
109	pcg	1.13	icmp_type = ICMP_ECHOREPLY;
110	pcg	1.16	#endif
111	pcg	1.1
112	pcg	1.5	default_node.udp_port = DEFAULT_UDPPORT;
113	pcg	1.8	default_node.tcp_port = DEFAULT_UDPPORT;
114	pcg	1.1	default_node.connectmode = conf_node::C_ALWAYS;
115			default_node.compress = true;
116	pcg	1.6	default_node.protocols = PROT_UDPv4;
117	pcg	1.1	}
118
119			void configuration::cleanup()
120			{
121			if (rsa_key)
122			RSA_free (rsa_key);
123
124	pcg	1.12	rsa_key = 0;
125	pcg	1.1
126	pcg	1.12	free (ifname); ifname = 0;
127			#if ENABLE_HTTP_PROXY
128			free (proxy_host); proxy_host = 0;
129			free (proxy_auth); proxy_auth = 0;
130			#endif
131	pcg	1.1	}
132
133			void
134			configuration::clear_config ()
135			{
136			for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
137			delete *i;
138
139			nodes.clear ();
140
141			cleanup ();
142			init ();
143			}
144
145	pcg	1.5	#define parse_bool(target,name,trueval,falseval) \
146			if (!strcmp (val, "yes")) target = trueval; \
147			else if (!strcmp (val, "no")) target = falseval; \
148			else if (!strcmp (val, "true")) target = trueval; \
149			else if (!strcmp (val, "false")) target = falseval; \
150			else if (!strcmp (val, "on")) target = trueval; \
151			else if (!strcmp (val, "off")) target = falseval; \
152			else \
153			slog (L_WARN, \
154			_("illegal value for '%s', only 'yes\|true\|on' or 'no\|false\|off' allowed, at '%s' line %d"), \
155			name, var, fname, lineno);
156
157	pcg	1.1	void configuration::read_config (bool need_keys)
158			{
159			char *fname;
160			FILE *f;
161
162			clear_config ();
163
164			asprintf (&fname, "%s/vped.conf", confbase);
165			f = fopen (fname, "r");
166
167			if (f)
168			{
169			char line[16384];
170			int lineno = 0;
171			char var, val;
172			conf_node *node = &default_node;
173
174			while (fgets (line, sizeof (line), f))
175			{
176			lineno++;
177
178			{
179			char *end = line + strlen (line);
180
181			while (*end < ' ' && end >= line)
182			end--;
183
184			*++end = 0;
185			}
186
187			char *tok = line;
188
189			retry:
190			var = strtok (tok, "\t =");
191			tok = 0;
192
193			if (!var \|\| !var[0])
194			continue; /* no tokens on this line */
195
196			if (var[0] == '#')
197			continue; /* comment: ignore */
198
199			val = strtok (NULL, "\t\n\r =");
200
201			if (!val \|\| val[0] == '#')
202			{
203			slog (L_WARN,
204			_("no value for variable `%s', at '%s' line %d"),
205			var, fname, lineno);
206			break;
207			}
208
209			if (!strcmp (var, "on"))
210			{
211			if (!::thisnode
212			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
213			\|\| !strcmp (val, ::thisnode))
214			goto retry;
215
216			continue;
217			}
218
219			// truly global
220			if (!strcmp (var, "loglevel"))
221			{
222			loglevel l = string_to_loglevel (val);
223
224			if (l != L_NONE)
225	pcg	1.2	llevel = l;
226	pcg	1.1	else
227			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
228			}
229	pcg	1.5	else if (!strcmp (var, "ip-proto"))
230			ip_proto = atoi (val);
231	pcg	1.20	else if (!strcmp (var, "icmp-type"))
232			{
233	pcg	1.16	#if ENABLE_ICMP
234	pcg	1.20	icmp_type = atoi (val);
235	pcg	1.16	#endif
236	pcg	1.20	}
237	pcg	1.1
238			// per config
239			else if (!strcmp (var, "node"))
240			{
241			default_node.id++;
242
243			node = new conf_node (default_node);
244
245			nodes.push_back (node);
246
247			node->nodename = strdup (val);
248
249			{
250			char *fname;
251			FILE *f;
252
253			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
254
255			f = fopen (fname, "r");
256			if (f)
257			{
258			node->rsa_key = RSA_new ();
259
260			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
261			{
262			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
263			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
264	pcg	1.22	exit (EXIT_FAILURE);
265	pcg	1.1	}
266
267	pcg	1.22	require (RSA_blinding_on (node->rsa_key, 0));
268	pcg	1.1
269			fclose (f);
270			}
271			else
272			{
273			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
274
275			if (need_keys)
276	pcg	1.22	exit (EXIT_FAILURE);
277	pcg	1.1	}
278
279			free (fname);
280			}
281
282			if (!::thisnode \|\| !strcmp (node->nodename, ::thisnode))
283			thisnode = node;
284			}
285			else if (!strcmp (var, "private-key"))
286			prikeyfile = strdup (val);
287			else if (!strcmp (var, "ifpersist"))
288			{
289	pcg	1.5	parse_bool (ifpersist, "ifpersist", true, false);
290	pcg	1.1	}
291			else if (!strcmp (var, "ifname"))
292			ifname = strdup (val);
293			else if (!strcmp (var, "rekey"))
294			rekey = atoi (val);
295			else if (!strcmp (var, "keepalive"))
296			keepalive = atoi (val);
297			else if (!strcmp (var, "mtu"))
298			mtu = atoi (val);
299			else if (!strcmp (var, "if-up"))
300			script_if_up = strdup (val);
301			else if (!strcmp (var, "node-up"))
302			script_node_up = strdup (val);
303			else if (!strcmp (var, "node-down"))
304			script_node_down = strdup (val);
305	pcg	1.20	else if (!strcmp (var, "http-proxy-host"))
306			{
307	pcg	1.12	#if ENABLE_HTTP_PROXY
308	pcg	1.20	proxy_host = strdup (val);
309			#endif
310			}
311	pcg	1.12	else if (!strcmp (var, "http-proxy-port"))
312	pcg	1.20	{
313			#if ENABLE_HTTP_PROXY
314			proxy_port = atoi (val);
315			#endif
316			}
317	pcg	1.12	else if (!strcmp (var, "http-proxy-auth"))
318	pcg	1.20	{
319			#if ENABLE_HTTP_PROXY
320			proxy_auth = (char )base64_encode ((const u8 )val, strlen (val));
321	pcg	1.12	#endif
322	pcg	1.20	}
323	pcg	1.1
324			/* node-specific, non-defaultable */
325			else if (node != &default_node && !strcmp (var, "hostname"))
326			{
327			free (node->hostname);
328			node->hostname = strdup (val);
329			}
330
331			/* node-specific, defaultable */
332	pcg	1.4	else if (!strcmp (var, "udp-port"))
333	pcg	1.5	node->udp_port = atoi (val);
334	pcg	1.8	else if (!strcmp (var, "tcp-port"))
335			node->tcp_port = atoi (val);
336	pcg	1.1	else if (!strcmp (var, "router-priority"))
337			node->routerprio = atoi (val);
338			else if (!strcmp (var, "connect"))
339			{
340			if (!strcmp (val, "ondemand"))
341			node->connectmode = conf_node::C_ONDEMAND;
342			else if (!strcmp (val, "never"))
343			node->connectmode = conf_node::C_NEVER;
344			else if (!strcmp (val, "always"))
345			node->connectmode = conf_node::C_ALWAYS;
346	pcg	1.4	else if (!strcmp (val, "disabled"))
347			node->connectmode = conf_node::C_DISABLED;
348	pcg	1.1	else
349			slog (L_WARN,
350	pcg	1.4	_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
351	pcg	1.1	var, fname, lineno);
352			}
353	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
354			{
355	pcg	1.5	parse_bool (node->inherit_tos, "inherit-tos", true, false);
356	pcg	1.3	}
357	pcg	1.1	else if (!strcmp (var, "compress"))
358			{
359	pcg	1.5	parse_bool (node->compress, "compress", true, false);
360			}
361			// all these bool options really really cost a lot of executable size!
362	pcg	1.8	else if (!strcmp (var, "enable-tcp"))
363			{
364	pcg	1.11	#if ENABLE_TCP
365	pcg	1.8	u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) \| v;
366	pcg	1.13	#endif
367			}
368			else if (!strcmp (var, "enable-icmp"))
369			{
370			#if ENABLE_ICMP
371			u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) \| v;
372	pcg	1.11	#endif
373	pcg	1.8	}
374	pcg	1.6	else if (!strcmp (var, "enable-udp"))
375	pcg	1.5	{
376	pcg	1.6	u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
377	pcg	1.5	}
378	pcg	1.6	else if (!strcmp (var, "enable-rawip"))
379	pcg	1.5	{
380	pcg	1.6	u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
381	pcg	1.1	}
382
383			// unknown or misplaced
384			else
385	pcg	1.12	slog (L_WARN,
386			_("unknown or misplaced variable `%s', at '%s' line %d"),
387			var, fname, lineno);
388	pcg	1.1	}
389
390			fclose (f);
391			}
392			else
393			{
394			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
395	pcg	1.22	exit (EXIT_FAILURE);
396	pcg	1.1	}
397
398			free (fname);
399
400			fname = config_filename (prikeyfile, "hostkey");
401
402			f = fopen (fname, "r");
403			if (f)
404			{
405			rsa_key = RSA_new ();
406
407			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
408			{
409			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
410			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
411	pcg	1.22	exit (EXIT_FAILURE);
412	pcg	1.1	}
413
414	pcg	1.22	require (RSA_blinding_on (rsa_key, 0));
415	pcg	1.1
416			fclose (f);
417			}
418			else
419			{
420			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
421
422			if (need_keys)
423	pcg	1.22	exit (EXIT_FAILURE);
424	pcg	1.1	}
425	pcg	1.22
426			if (need_keys && rsa_key && thisnode && thisnode->rsa_key)
427			if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0
428			\|\| BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0)
429			{
430			slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
431			exit (EXIT_FAILURE);
432			}
433	pcg	1.1
434			free (fname);
435			}
436
437			char configuration::config_filename (const char name, const char *dflt)
438			{
439			char *fname;
440
441			asprintf (&fname, name ? name : dflt, ::thisnode);
442
443			if (!ABSOLUTE_PATH (fname))
444			{
445			char *rname = fname;
446			asprintf (&fname, "%s/%s", confbase, rname);
447			free (rname);
448			}
449
450			return fname;
451			}
452
453			void
454			configuration::print ()
455			{
456			printf (_("\nConfiguration\n\n"));
457			printf (_("# of nodes: %d\n"), nodes.size ());
458			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
459			printf (_("MTU: %d\n"), mtu);
460			printf (_("rekeying interval: %d\n"), rekey);
461			printf (_("keepalive interval: %d\n"), keepalive);
462			printf (_("interface: %s\n"), ifname);
463			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
464	pcg	1.15	printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
465	pcg	1.1	printf ("\n");
466
467			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
468			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
469
470			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
471			(*i)->print ();
472
473			printf ("\n");
474			}
475
476	pcg	1.12	configuration::configuration ()
477			{
478			init ();
479			}
480
481			configuration::~configuration ()
482	pcg	1.1	{
483	pcg	1.12	cleanup ();
484	pcg	1.1	}
485	pcg	1.12
486	pcg	1.1