gvpe/src/conf.C

/*
    conf.c -- configuration code
    Copyright (C) 1998 Robert van der Meulen
                  1998-2002 Ivo Timmermans <ivo@o2w.nl>
                  2000-2002 Guus Sliepen <guus@sliepen.eu.org>
                  2000 Cris van Pelt <tribbel@arise.dhs.org>
                  2003 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 <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#include <openssl/rand.h>

#include "gettext.h"

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

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

struct configuration conf;

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

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

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

  rekey     = DEFAULT_REKEY;
  keepalive = DEFAULT_KEEPALIVE;
  llevel    = L_INFO;

  default_node.port        = DEFAULT_PORT;
  default_node.connectmode = conf_node::C_ALWAYS;
  default_node.compress    = true;
}

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

  free (ifname);

  rsa_key = 0;
  ifname = 0;
}

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

  nodes.clear ();

  cleanup ();
  init ();
}

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);
            }

          // 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 (1);
                      }

                    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 (1);
                  }

                free (fname);
              }

              if (!::thisnode || !strcmp (node->nodename, ::thisnode))
                thisnode = node;
            }
          else if (!strcmp (var, "private-key"))
            prikeyfile = strdup (val);
          else if (!strcmp (var, "ifpersist"))
            {
              if (!strcmp (val, "yes"))
                ifpersist = true;
              else if (!strcmp (val, "no"))
                ifpersist = false;
              else
                slog (L_WARN,
                        _("illegal value for 'ifpersist', only 'yes' or 'no' allowed, at '%s' line %d"),
                        var, fname, lineno);
            }
          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);

          /* 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, "port"))
            node->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
                slog (L_WARN,
                        _("illegal value for 'connectmode', use one of 'ondemand', 'never' or 'always', at '%s' line %d"),
                        var, fname, lineno);
            }
          else if (!strcmp (var, "inherit-tos"))
            {
              if (!strcmp (val, "yes"))
                node->inherit_tos = true;
              else if (!strcmp (val, "no"))
                node->inherit_tos = false;
              else
                slog (L_WARN,
                        _("illegal value for 'compress', only 'yes' or 'no' allowed, at '%s' line %d"),
                        var, fname, lineno);
            }

          else if (!strcmp (var, "compress"))
            {
              if (!strcmp (val, "yes"))
                node->compress = true;
              else if (!strcmp (val, "no"))
                node->compress = false;
              else
                slog (L_WARN,
                        _("illegal value for 'compress', only 'yes' or 'no' allowed, at '%s' line %d"),
                        var, fname, lineno);
            }

          // 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 (1);
    }

  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 (1);
        }

      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 (1);
    }

  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) : -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");
}

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 ? port : 0
          );
}

Revision:	1.3
Committed:	Sun Mar 9 12:40:18 2003 UTC (23 years, 7 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+12 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
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 <openssl/err.h>
37			#include <openssl/pem.h>
38			#include <openssl/rsa.h>
39			#include <openssl/rand.h>
40
41			#include "gettext.h"
42
43			#include "conf.h"
44			#include "slog.h"
45			#include "util.h"
46
47			char *confbase;
48			char *thisnode;
49			char *identname;
50			char *pidfilename;
51
52			struct configuration conf;
53
54			configuration::configuration ()
55			{
56			init ();
57			}
58
59			configuration::~configuration ()
60			{
61			cleanup ();
62			}
63
64			void configuration::init ()
65			{
66			memset (this, 0, sizeof (*this));
67
68			rekey = DEFAULT_REKEY;
69			keepalive = DEFAULT_KEEPALIVE;
70	pcg	1.2	llevel = L_INFO;
71	pcg	1.1
72			default_node.port = DEFAULT_PORT;
73			default_node.connectmode = conf_node::C_ALWAYS;
74			default_node.compress = true;
75			}
76
77			void configuration::cleanup()
78			{
79			if (rsa_key)
80			RSA_free (rsa_key);
81
82			free (ifname);
83
84			rsa_key = 0;
85			ifname = 0;
86			}
87
88			void
89			configuration::clear_config ()
90			{
91			for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
92			delete *i;
93
94			nodes.clear ();
95
96			cleanup ();
97			init ();
98			}
99
100			void configuration::read_config (bool need_keys)
101			{
102			char *fname;
103			FILE *f;
104
105			clear_config ();
106
107			asprintf (&fname, "%s/vped.conf", confbase);
108			f = fopen (fname, "r");
109
110			if (f)
111			{
112			char line[16384];
113			int lineno = 0;
114			char var, val;
115			conf_node *node = &default_node;
116
117			while (fgets (line, sizeof (line), f))
118			{
119			lineno++;
120
121			{
122			char *end = line + strlen (line);
123
124			while (*end < ' ' && end >= line)
125			end--;
126
127			*++end = 0;
128			}
129
130			char *tok = line;
131
132			retry:
133			var = strtok (tok, "\t =");
134			tok = 0;
135
136			if (!var \|\| !var[0])
137			continue; /* no tokens on this line */
138
139			if (var[0] == '#')
140			continue; /* comment: ignore */
141
142			val = strtok (NULL, "\t\n\r =");
143
144			if (!val \|\| val[0] == '#')
145			{
146			slog (L_WARN,
147			_("no value for variable `%s', at '%s' line %d"),
148			var, fname, lineno);
149			break;
150			}
151
152			if (!strcmp (var, "on"))
153			{
154			if (!::thisnode
155			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
156			\|\| !strcmp (val, ::thisnode))
157			goto retry;
158
159			continue;
160			}
161
162			// truly global
163			if (!strcmp (var, "loglevel"))
164			{
165			loglevel l = string_to_loglevel (val);
166
167			if (l != L_NONE)
168	pcg	1.2	llevel = l;
169	pcg	1.1	else
170			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
171			}
172
173			// per config
174			else if (!strcmp (var, "node"))
175			{
176			default_node.id++;
177
178			node = new conf_node (default_node);
179
180			nodes.push_back (node);
181
182			node->nodename = strdup (val);
183
184			{
185			char *fname;
186			FILE *f;
187
188			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
189
190			f = fopen (fname, "r");
191			if (f)
192			{
193			node->rsa_key = RSA_new ();
194
195			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
196			{
197			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));
199			exit (1);
200			}
201
202			RSA_blinding_on (node->rsa_key, 0);
203
204			fclose (f);
205			}
206			else
207			{
208			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
209
210			if (need_keys)
211			exit (1);
212			}
213
214			free (fname);
215			}
216
217			if (!::thisnode \|\| !strcmp (node->nodename, ::thisnode))
218			thisnode = node;
219			}
220			else if (!strcmp (var, "private-key"))
221			prikeyfile = strdup (val);
222			else if (!strcmp (var, "ifpersist"))
223			{
224			if (!strcmp (val, "yes"))
225			ifpersist = true;
226			else if (!strcmp (val, "no"))
227			ifpersist = false;
228			else
229			slog (L_WARN,
230			_("illegal value for 'ifpersist', only 'yes' or 'no' allowed, at '%s' line %d"),
231			var, fname, lineno);
232			}
233			else if (!strcmp (var, "ifname"))
234			ifname = strdup (val);
235			else if (!strcmp (var, "rekey"))
236			rekey = atoi (val);
237			else if (!strcmp (var, "keepalive"))
238			keepalive = atoi (val);
239			else if (!strcmp (var, "mtu"))
240			mtu = atoi (val);
241			else if (!strcmp (var, "if-up"))
242			script_if_up = strdup (val);
243			else if (!strcmp (var, "node-up"))
244			script_node_up = strdup (val);
245			else if (!strcmp (var, "node-down"))
246			script_node_down = strdup (val);
247
248			/* node-specific, non-defaultable */
249			else if (node != &default_node && !strcmp (var, "hostname"))
250			{
251			free (node->hostname);
252			node->hostname = strdup (val);
253			}
254
255			/* node-specific, defaultable */
256			else if (!strcmp (var, "port"))
257			node->port = atoi (val);
258			else if (!strcmp (var, "router-priority"))
259			node->routerprio = atoi (val);
260			else if (!strcmp (var, "connect"))
261			{
262			if (!strcmp (val, "ondemand"))
263			node->connectmode = conf_node::C_ONDEMAND;
264			else if (!strcmp (val, "never"))
265			node->connectmode = conf_node::C_NEVER;
266			else if (!strcmp (val, "always"))
267			node->connectmode = conf_node::C_ALWAYS;
268			else
269			slog (L_WARN,
270			_("illegal value for 'connectmode', use one of 'ondemand', 'never' or 'always', at '%s' line %d"),
271			var, fname, lineno);
272			}
273	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
274			{
275			if (!strcmp (val, "yes"))
276			node->inherit_tos = true;
277			else if (!strcmp (val, "no"))
278			node->inherit_tos = false;
279			else
280			slog (L_WARN,
281			_("illegal value for 'compress', only 'yes' or 'no' allowed, at '%s' line %d"),
282			var, fname, lineno);
283			}
284
285	pcg	1.1	else if (!strcmp (var, "compress"))
286			{
287			if (!strcmp (val, "yes"))
288			node->compress = true;
289			else if (!strcmp (val, "no"))
290			node->compress = false;
291			else
292			slog (L_WARN,
293			_("illegal value for 'compress', only 'yes' or 'no' allowed, at '%s' line %d"),
294			var, fname, lineno);
295			}
296
297			// unknown or misplaced
298			else
299			{
300			slog (L_WARN,
301			_("unknown or misplaced variable `%s', at '%s' line %d"),
302			var, fname, lineno);
303			}
304			}
305
306			fclose (f);
307			}
308			else
309			{
310			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
311			exit (1);
312			}
313
314			free (fname);
315
316			fname = config_filename (prikeyfile, "hostkey");
317
318			f = fopen (fname, "r");
319			if (f)
320			{
321			rsa_key = RSA_new ();
322
323			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
324			{
325			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
326			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
327			exit (1);
328			}
329
330			RSA_blinding_on (rsa_key, 0);
331
332			fclose (f);
333			}
334			else
335			{
336			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
337
338			if (need_keys)
339			exit (1);
340			}
341
342			free (fname);
343			}
344
345			char configuration::config_filename (const char name, const char *dflt)
346			{
347			char *fname;
348
349			asprintf (&fname, name ? name : dflt, ::thisnode);
350
351			if (!ABSOLUTE_PATH (fname))
352			{
353			char *rname = fname;
354			asprintf (&fname, "%s/%s", confbase, rname);
355			free (rname);
356			}
357
358			return fname;
359			}
360
361			void
362			configuration::print ()
363			{
364			printf (_("\nConfiguration\n\n"));
365			printf (_("# of nodes: %d\n"), nodes.size ());
366			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
367			printf (_("MTU: %d\n"), mtu);
368			printf (_("rekeying interval: %d\n"), rekey);
369			printf (_("keepalive interval: %d\n"), keepalive);
370			printf (_("interface: %s\n"), ifname);
371			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
372			printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1);
373			printf ("\n");
374
375			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
376			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
377
378			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
379			(*i)->print ();
380
381			printf ("\n");
382			}
383
384			void
385			conf_node::print ()
386			{
387			printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n",
388			id,
389			id >> 8, id & 0xff,
390			compress ? 'Y' : 'N',
391			connectmode == C_ONDEMAND ? "ondemand" :
392			connectmode == C_NEVER ? "never" :
393			connectmode == C_ALWAYS ? "always" : "",
394			nodename,
395			hostname ? hostname : "",
396			hostname ? ":" : "",
397			hostname ? port : 0
398			);
399			}
400