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 <netinet/in.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;
  ip_proto  = IPPROTO_GRE;

  default_node.udp_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);

  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 ();
}

#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);

          // 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"))
            {
              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);

          /* 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, "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-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 (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 ? udp_port : 0
          );
}

Revision:	1.6
Committed:	Fri Mar 28 16:14:40 2003 UTC (21 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.5:	+5 -14 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	pcg	1.5	#include <netinet/in.h>
37
38	pcg	1.1	#include <openssl/err.h>
39			#include <openssl/pem.h>
40			#include <openssl/rsa.h>
41			#include <openssl/rand.h>
42
43			#include "gettext.h"
44
45			#include "conf.h"
46			#include "slog.h"
47			#include "util.h"
48
49			char *confbase;
50			char *thisnode;
51			char *identname;
52			char *pidfilename;
53
54			struct configuration conf;
55
56			configuration::configuration ()
57			{
58			init ();
59			}
60
61			configuration::~configuration ()
62			{
63			cleanup ();
64			}
65
66			void configuration::init ()
67			{
68			memset (this, 0, sizeof (*this));
69
70			rekey = DEFAULT_REKEY;
71			keepalive = DEFAULT_KEEPALIVE;
72	pcg	1.2	llevel = L_INFO;
73	pcg	1.5	ip_proto = IPPROTO_GRE;
74	pcg	1.1
75	pcg	1.5	default_node.udp_port = DEFAULT_UDPPORT;
76	pcg	1.1	default_node.connectmode = conf_node::C_ALWAYS;
77			default_node.compress = true;
78	pcg	1.6	default_node.protocols = PROT_UDPv4;
79	pcg	1.1	}
80
81			void configuration::cleanup()
82			{
83			if (rsa_key)
84			RSA_free (rsa_key);
85
86			free (ifname);
87
88			rsa_key = 0;
89			ifname = 0;
90			}
91
92			void
93			configuration::clear_config ()
94			{
95			for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
96			delete *i;
97
98			nodes.clear ();
99
100			cleanup ();
101			init ();
102			}
103
104	pcg	1.5	#define parse_bool(target,name,trueval,falseval) \
105			if (!strcmp (val, "yes")) target = trueval; \
106			else if (!strcmp (val, "no")) target = falseval; \
107			else if (!strcmp (val, "true")) target = trueval; \
108			else if (!strcmp (val, "false")) target = falseval; \
109			else if (!strcmp (val, "on")) target = trueval; \
110			else if (!strcmp (val, "off")) target = falseval; \
111			else \
112			slog (L_WARN, \
113			_("illegal value for '%s', only 'yes\|true\|on' or 'no\|false\|off' allowed, at '%s' line %d"), \
114			name, var, fname, lineno);
115
116	pcg	1.1	void configuration::read_config (bool need_keys)
117			{
118			char *fname;
119			FILE *f;
120
121			clear_config ();
122
123			asprintf (&fname, "%s/vped.conf", confbase);
124			f = fopen (fname, "r");
125
126			if (f)
127			{
128			char line[16384];
129			int lineno = 0;
130			char var, val;
131			conf_node *node = &default_node;
132
133			while (fgets (line, sizeof (line), f))
134			{
135			lineno++;
136
137			{
138			char *end = line + strlen (line);
139
140			while (*end < ' ' && end >= line)
141			end--;
142
143			*++end = 0;
144			}
145
146			char *tok = line;
147
148			retry:
149			var = strtok (tok, "\t =");
150			tok = 0;
151
152			if (!var \|\| !var[0])
153			continue; /* no tokens on this line */
154
155			if (var[0] == '#')
156			continue; /* comment: ignore */
157
158			val = strtok (NULL, "\t\n\r =");
159
160			if (!val \|\| val[0] == '#')
161			{
162			slog (L_WARN,
163			_("no value for variable `%s', at '%s' line %d"),
164			var, fname, lineno);
165			break;
166			}
167
168			if (!strcmp (var, "on"))
169			{
170			if (!::thisnode
171			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
172			\|\| !strcmp (val, ::thisnode))
173			goto retry;
174
175			continue;
176			}
177
178			// truly global
179			if (!strcmp (var, "loglevel"))
180			{
181			loglevel l = string_to_loglevel (val);
182
183			if (l != L_NONE)
184	pcg	1.2	llevel = l;
185	pcg	1.1	else
186			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
187			}
188	pcg	1.5	else if (!strcmp (var, "ip-proto"))
189			ip_proto = atoi (val);
190	pcg	1.1
191			// per config
192			else if (!strcmp (var, "node"))
193			{
194			default_node.id++;
195
196			node = new conf_node (default_node);
197
198			nodes.push_back (node);
199
200			node->nodename = strdup (val);
201
202			{
203			char *fname;
204			FILE *f;
205
206			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
207
208			f = fopen (fname, "r");
209			if (f)
210			{
211			node->rsa_key = RSA_new ();
212
213			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
214			{
215			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
216			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
217			exit (1);
218			}
219
220			RSA_blinding_on (node->rsa_key, 0);
221
222			fclose (f);
223			}
224			else
225			{
226			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
227
228			if (need_keys)
229			exit (1);
230			}
231
232			free (fname);
233			}
234
235			if (!::thisnode \|\| !strcmp (node->nodename, ::thisnode))
236			thisnode = node;
237			}
238			else if (!strcmp (var, "private-key"))
239			prikeyfile = strdup (val);
240			else if (!strcmp (var, "ifpersist"))
241			{
242	pcg	1.5	parse_bool (ifpersist, "ifpersist", true, false);
243	pcg	1.1	}
244			else if (!strcmp (var, "ifname"))
245			ifname = strdup (val);
246			else if (!strcmp (var, "rekey"))
247			rekey = atoi (val);
248			else if (!strcmp (var, "keepalive"))
249			keepalive = atoi (val);
250			else if (!strcmp (var, "mtu"))
251			mtu = atoi (val);
252			else if (!strcmp (var, "if-up"))
253			script_if_up = strdup (val);
254			else if (!strcmp (var, "node-up"))
255			script_node_up = strdup (val);
256			else if (!strcmp (var, "node-down"))
257			script_node_down = strdup (val);
258
259			/* node-specific, non-defaultable */
260			else if (node != &default_node && !strcmp (var, "hostname"))
261			{
262			free (node->hostname);
263			node->hostname = strdup (val);
264			}
265
266			/* node-specific, defaultable */
267	pcg	1.4	else if (!strcmp (var, "udp-port"))
268	pcg	1.5	node->udp_port = atoi (val);
269	pcg	1.1	else if (!strcmp (var, "router-priority"))
270			node->routerprio = atoi (val);
271			else if (!strcmp (var, "connect"))
272			{
273			if (!strcmp (val, "ondemand"))
274			node->connectmode = conf_node::C_ONDEMAND;
275			else if (!strcmp (val, "never"))
276			node->connectmode = conf_node::C_NEVER;
277			else if (!strcmp (val, "always"))
278			node->connectmode = conf_node::C_ALWAYS;
279	pcg	1.4	else if (!strcmp (val, "disabled"))
280			node->connectmode = conf_node::C_DISABLED;
281	pcg	1.1	else
282			slog (L_WARN,
283	pcg	1.4	_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
284	pcg	1.1	var, fname, lineno);
285			}
286	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
287			{
288	pcg	1.5	parse_bool (node->inherit_tos, "inherit-tos", true, false);
289	pcg	1.3	}
290	pcg	1.1	else if (!strcmp (var, "compress"))
291			{
292	pcg	1.5	parse_bool (node->compress, "compress", true, false);
293			}
294			// all these bool options really really cost a lot of executable size!
295	pcg	1.6	else if (!strcmp (var, "enable-udp"))
296	pcg	1.5	{
297	pcg	1.6	u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
298	pcg	1.5	}
299	pcg	1.6	else if (!strcmp (var, "enable-rawip"))
300	pcg	1.5	{
301	pcg	1.6	u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
302	pcg	1.1	}
303
304			// unknown or misplaced
305			else
306			{
307			slog (L_WARN,
308			_("unknown or misplaced variable `%s', at '%s' line %d"),
309			var, fname, lineno);
310			}
311			}
312
313			fclose (f);
314			}
315			else
316			{
317			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
318			exit (1);
319			}
320
321			free (fname);
322
323			fname = config_filename (prikeyfile, "hostkey");
324
325			f = fopen (fname, "r");
326			if (f)
327			{
328			rsa_key = RSA_new ();
329
330			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
331			{
332			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
333			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
334			exit (1);
335			}
336
337			RSA_blinding_on (rsa_key, 0);
338
339			fclose (f);
340			}
341			else
342			{
343			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
344
345			if (need_keys)
346			exit (1);
347			}
348
349			free (fname);
350			}
351
352			char configuration::config_filename (const char name, const char *dflt)
353			{
354			char *fname;
355
356			asprintf (&fname, name ? name : dflt, ::thisnode);
357
358			if (!ABSOLUTE_PATH (fname))
359			{
360			char *rname = fname;
361			asprintf (&fname, "%s/%s", confbase, rname);
362			free (rname);
363			}
364
365			return fname;
366			}
367
368			void
369			configuration::print ()
370			{
371			printf (_("\nConfiguration\n\n"));
372			printf (_("# of nodes: %d\n"), nodes.size ());
373			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
374			printf (_("MTU: %d\n"), mtu);
375			printf (_("rekeying interval: %d\n"), rekey);
376			printf (_("keepalive interval: %d\n"), keepalive);
377			printf (_("interface: %s\n"), ifname);
378			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
379			printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) : -1);
380			printf ("\n");
381
382			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
383			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
384
385			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
386			(*i)->print ();
387
388			printf ("\n");
389			}
390
391			void
392			conf_node::print ()
393			{
394			printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n",
395			id,
396			id >> 8, id & 0xff,
397			compress ? 'Y' : 'N',
398			connectmode == C_ONDEMAND ? "ondemand" :
399			connectmode == C_NEVER ? "never" :
400			connectmode == C_ALWAYS ? "always" : "",
401			nodename,
402			hostname ? hostname : "",
403			hostname ? ":" : "",
404	pcg	1.5	hostname ? udp_port : 0
405	pcg	1.1	);
406			}
407