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;

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;
  if (protset & PROT_DNSv4 ) return PROT_DNSv4;

  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";
  if (protocol & PROT_DNSv4 ) return "dns";

  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; // ehrm
  default_node.connectmode = conf_node::C_ALWAYS;
  default_node.compress    = true;
  default_node.protocols   = PROT_UDPv4;
  default_node.max_retry   = DEFAULT_MAX_RETRY;

  conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
}

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

  rsa_key = 0;

  free (pidfilename); pidfilename = 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/gvpe.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"))
            free (prikeyfile), prikeyfile = strdup (val);
          else if (!strcmp (var, "ifpersist"))
            {
              parse_bool (ifpersist, "ifpersist", true, false);
            }
          else if (!strcmp (var, "ifname"))
            free (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"))
            free (script_if_up), script_if_up = strdup (val);
          else if (!strcmp (var, "node-up"))
            free (script_node_up), script_node_up = strdup (val);
          else if (!strcmp (var, "node-down"))
            free (script_node_down), script_node_down = strdup (val);
          else if (!strcmp (var, "pid-file"))
            free (pidfilename), pidfilename = strdup (val);
          else if (!strcmp (var, "http-proxy-host"))
            {
#if ENABLE_HTTP_PROXY
              free (proxy_host), 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, "dns-port"))
            node->dns_port = atoi (val);
          else if (!strcmp (var, "router-priority"))
            node->routerprio = atoi (val);
          else if (!strcmp (var, "max-retry"))
            node->max_retry = 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-dns"))
            {
#if ENABLE_DNS
              u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) | 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 && ::thisnode
      && 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 ()
{
  asprintf (&confbase, "%s/gvpe", CONFDIR);

  init ();
}

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


Revision:	1.27
Committed:	Fri Jun 11 15:56:31 2004 UTC (19 years, 11 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-1_7
Changes since 1.26:	+8 -5 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
50			struct configuration conf;
51
52	pcg	1.7	u8 best_protocol (u8 protset)
53			{
54	pcg	1.13	if (protset & PROT_IPv4 ) return PROT_IPv4;
55			if (protset & PROT_ICMPv4) return PROT_ICMPv4;
56			if (protset & PROT_UDPv4 ) return PROT_UDPv4;
57			if (protset & PROT_TCPv4 ) return PROT_TCPv4;
58	pcg	1.24	if (protset & PROT_DNSv4 ) return PROT_DNSv4;
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	1.24	if (protocol & PROT_DNSv4 ) return "dns";
70	pcg	1.7
71			return "<unknown>";
72			}
73
74	pcg	1.12	void
75			conf_node::print ()
76	pcg	1.1	{
77	pcg	1.12	printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n",
78			id,
79			id >> 8, id & 0xff,
80			compress ? 'Y' : 'N',
81			connectmode == C_ONDEMAND ? "ondemand" :
82			connectmode == C_NEVER ? "never" :
83			connectmode == C_ALWAYS ? "always" : "",
84			nodename,
85			hostname ? hostname : "",
86			hostname ? ":" : "",
87			hostname ? udp_port : 0
88			);
89	pcg	1.1	}
90
91	pcg	1.12	conf_node::~conf_node ()
92	pcg	1.1	{
93	pcg	1.12	if (rsa_key)
94			RSA_free (rsa_key);
95
96			free (nodename);
97			free (hostname);
98	pcg	1.1	}
99
100			void configuration::init ()
101			{
102			memset (this, 0, sizeof (*this));
103
104	pcg	1.19	mtu = DEFAULT_MTU;
105	pcg	1.1	rekey = DEFAULT_REKEY;
106			keepalive = DEFAULT_KEEPALIVE;
107	pcg	1.2	llevel = L_INFO;
108	pcg	1.5	ip_proto = IPPROTO_GRE;
109	pcg	1.16	#if ENABLE_ICMP
110	pcg	1.13	icmp_type = ICMP_ECHOREPLY;
111	pcg	1.16	#endif
112	pcg	1.1
113	pcg	1.5	default_node.udp_port = DEFAULT_UDPPORT;
114	pcg	1.24	default_node.tcp_port = DEFAULT_UDPPORT; // ehrm
115	pcg	1.1	default_node.connectmode = conf_node::C_ALWAYS;
116			default_node.compress = true;
117	pcg	1.6	default_node.protocols = PROT_UDPv4;
118	pcg	1.27	default_node.max_retry = DEFAULT_MAX_RETRY;
119	pcg	1.25
120	pcg	1.27	conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
121	pcg	1.1	}
122
123			void configuration::cleanup()
124			{
125			if (rsa_key)
126			RSA_free (rsa_key);
127
128	pcg	1.12	rsa_key = 0;
129	pcg	1.1
130	pcg	1.24	free (pidfilename); pidfilename = 0;
131			free (ifname); ifname = 0;
132	pcg	1.12	#if ENABLE_HTTP_PROXY
133	pcg	1.24	free (proxy_host); proxy_host = 0;
134			free (proxy_auth); proxy_auth = 0;
135	pcg	1.12	#endif
136	pcg	1.1	}
137
138			void
139			configuration::clear_config ()
140			{
141			for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
142			delete *i;
143
144			nodes.clear ();
145
146			cleanup ();
147			init ();
148			}
149
150	pcg	1.5	#define parse_bool(target,name,trueval,falseval) \
151			if (!strcmp (val, "yes")) target = trueval; \
152			else if (!strcmp (val, "no")) target = falseval; \
153			else if (!strcmp (val, "true")) target = trueval; \
154			else if (!strcmp (val, "false")) target = falseval; \
155			else if (!strcmp (val, "on")) target = trueval; \
156			else if (!strcmp (val, "off")) target = falseval; \
157			else \
158			slog (L_WARN, \
159			_("illegal value for '%s', only 'yes\|true\|on' or 'no\|false\|off' allowed, at '%s' line %d"), \
160			name, var, fname, lineno);
161
162	pcg	1.1	void configuration::read_config (bool need_keys)
163			{
164			char *fname;
165			FILE *f;
166
167			clear_config ();
168
169	pcg	1.27	asprintf (&fname, "%s/gvpe.conf", confbase);
170	pcg	1.1	f = fopen (fname, "r");
171
172			if (f)
173			{
174			char line[16384];
175			int lineno = 0;
176			char var, val;
177			conf_node *node = &default_node;
178
179			while (fgets (line, sizeof (line), f))
180			{
181			lineno++;
182
183			{
184			char *end = line + strlen (line);
185
186			while (*end < ' ' && end >= line)
187			end--;
188
189			*++end = 0;
190			}
191
192			char *tok = line;
193
194			retry:
195			var = strtok (tok, "\t =");
196			tok = 0;
197
198			if (!var \|\| !var[0])
199			continue; /* no tokens on this line */
200
201			if (var[0] == '#')
202			continue; /* comment: ignore */
203
204			val = strtok (NULL, "\t\n\r =");
205
206			if (!val \|\| val[0] == '#')
207			{
208			slog (L_WARN,
209			_("no value for variable `%s', at '%s' line %d"),
210			var, fname, lineno);
211			break;
212			}
213
214			if (!strcmp (var, "on"))
215			{
216			if (!::thisnode
217			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
218			\|\| !strcmp (val, ::thisnode))
219			goto retry;
220
221			continue;
222			}
223
224			// truly global
225			if (!strcmp (var, "loglevel"))
226			{
227			loglevel l = string_to_loglevel (val);
228
229			if (l != L_NONE)
230	pcg	1.2	llevel = l;
231	pcg	1.1	else
232			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
233			}
234	pcg	1.5	else if (!strcmp (var, "ip-proto"))
235			ip_proto = atoi (val);
236	pcg	1.20	else if (!strcmp (var, "icmp-type"))
237			{
238	pcg	1.16	#if ENABLE_ICMP
239	pcg	1.20	icmp_type = atoi (val);
240	pcg	1.16	#endif
241	pcg	1.20	}
242	pcg	1.1
243			// per config
244			else if (!strcmp (var, "node"))
245			{
246			default_node.id++;
247
248			node = new conf_node (default_node);
249
250			nodes.push_back (node);
251
252			node->nodename = strdup (val);
253
254			{
255			char *fname;
256			FILE *f;
257
258			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
259
260			f = fopen (fname, "r");
261			if (f)
262			{
263			node->rsa_key = RSA_new ();
264
265			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
266			{
267			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
268			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
269	pcg	1.22	exit (EXIT_FAILURE);
270	pcg	1.1	}
271
272	pcg	1.22	require (RSA_blinding_on (node->rsa_key, 0));
273	pcg	1.1
274			fclose (f);
275			}
276			else
277			{
278			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
279
280			if (need_keys)
281	pcg	1.22	exit (EXIT_FAILURE);
282	pcg	1.1	}
283
284			free (fname);
285			}
286
287	pcg	1.23	if (::thisnode && !strcmp (node->nodename, ::thisnode))
288	pcg	1.1	thisnode = node;
289			}
290			else if (!strcmp (var, "private-key"))
291	pcg	1.24	free (prikeyfile), prikeyfile = strdup (val);
292	pcg	1.1	else if (!strcmp (var, "ifpersist"))
293			{
294	pcg	1.5	parse_bool (ifpersist, "ifpersist", true, false);
295	pcg	1.1	}
296			else if (!strcmp (var, "ifname"))
297	pcg	1.24	free (ifname), ifname = strdup (val);
298	pcg	1.1	else if (!strcmp (var, "rekey"))
299			rekey = atoi (val);
300			else if (!strcmp (var, "keepalive"))
301			keepalive = atoi (val);
302			else if (!strcmp (var, "mtu"))
303			mtu = atoi (val);
304			else if (!strcmp (var, "if-up"))
305	pcg	1.24	free (script_if_up), script_if_up = strdup (val);
306	pcg	1.1	else if (!strcmp (var, "node-up"))
307	pcg	1.24	free (script_node_up), script_node_up = strdup (val);
308	pcg	1.1	else if (!strcmp (var, "node-down"))
309	pcg	1.24	free (script_node_down), script_node_down = strdup (val);
310			else if (!strcmp (var, "pid-file"))
311			free (pidfilename), pidfilename = strdup (val);
312	pcg	1.20	else if (!strcmp (var, "http-proxy-host"))
313			{
314	pcg	1.12	#if ENABLE_HTTP_PROXY
315	pcg	1.24	free (proxy_host), proxy_host = strdup (val);
316	pcg	1.20	#endif
317			}
318	pcg	1.12	else if (!strcmp (var, "http-proxy-port"))
319	pcg	1.20	{
320			#if ENABLE_HTTP_PROXY
321			proxy_port = atoi (val);
322			#endif
323			}
324	pcg	1.12	else if (!strcmp (var, "http-proxy-auth"))
325	pcg	1.20	{
326			#if ENABLE_HTTP_PROXY
327			proxy_auth = (char )base64_encode ((const u8 )val, strlen (val));
328	pcg	1.12	#endif
329	pcg	1.20	}
330	pcg	1.1
331			/* node-specific, non-defaultable */
332			else if (node != &default_node && !strcmp (var, "hostname"))
333	pcg	1.24	free (node->hostname), node->hostname = strdup (val);
334	pcg	1.1
335			/* node-specific, defaultable */
336	pcg	1.4	else if (!strcmp (var, "udp-port"))
337	pcg	1.5	node->udp_port = atoi (val);
338	pcg	1.8	else if (!strcmp (var, "tcp-port"))
339			node->tcp_port = atoi (val);
340	pcg	1.24	else if (!strcmp (var, "dns-port"))
341			node->dns_port = atoi (val);
342	pcg	1.1	else if (!strcmp (var, "router-priority"))
343			node->routerprio = atoi (val);
344	pcg	1.27	else if (!strcmp (var, "max-retry"))
345			node->max_retry = atoi (val);
346	pcg	1.1	else if (!strcmp (var, "connect"))
347			{
348			if (!strcmp (val, "ondemand"))
349			node->connectmode = conf_node::C_ONDEMAND;
350			else if (!strcmp (val, "never"))
351			node->connectmode = conf_node::C_NEVER;
352			else if (!strcmp (val, "always"))
353			node->connectmode = conf_node::C_ALWAYS;
354	pcg	1.4	else if (!strcmp (val, "disabled"))
355			node->connectmode = conf_node::C_DISABLED;
356	pcg	1.1	else
357			slog (L_WARN,
358	pcg	1.27	_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
359			var, fname, lineno);
360	pcg	1.1	}
361	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
362			{
363	pcg	1.5	parse_bool (node->inherit_tos, "inherit-tos", true, false);
364	pcg	1.3	}
365	pcg	1.1	else if (!strcmp (var, "compress"))
366			{
367	pcg	1.5	parse_bool (node->compress, "compress", true, false);
368			}
369			// all these bool options really really cost a lot of executable size!
370	pcg	1.8	else if (!strcmp (var, "enable-tcp"))
371			{
372	pcg	1.11	#if ENABLE_TCP
373	pcg	1.8	u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) \| v;
374	pcg	1.13	#endif
375			}
376			else if (!strcmp (var, "enable-icmp"))
377			{
378			#if ENABLE_ICMP
379			u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) \| v;
380	pcg	1.11	#endif
381	pcg	1.8	}
382	pcg	1.24	else if (!strcmp (var, "enable-dns"))
383			{
384			#if ENABLE_DNS
385			u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) \| v;
386			#endif
387			}
388	pcg	1.6	else if (!strcmp (var, "enable-udp"))
389	pcg	1.5	{
390	pcg	1.6	u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
391	pcg	1.5	}
392	pcg	1.6	else if (!strcmp (var, "enable-rawip"))
393	pcg	1.24	{;
394	pcg	1.6	u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
395	pcg	1.1	}
396
397			// unknown or misplaced
398			else
399	pcg	1.12	slog (L_WARN,
400			_("unknown or misplaced variable `%s', at '%s' line %d"),
401			var, fname, lineno);
402	pcg	1.1	}
403
404			fclose (f);
405			}
406			else
407			{
408			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
409	pcg	1.22	exit (EXIT_FAILURE);
410	pcg	1.1	}
411
412			free (fname);
413
414			fname = config_filename (prikeyfile, "hostkey");
415
416			f = fopen (fname, "r");
417			if (f)
418			{
419			rsa_key = RSA_new ();
420
421			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
422			{
423			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
424			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
425	pcg	1.22	exit (EXIT_FAILURE);
426	pcg	1.1	}
427
428	pcg	1.22	require (RSA_blinding_on (rsa_key, 0));
429	pcg	1.1
430			fclose (f);
431			}
432			else
433			{
434			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
435
436			if (need_keys)
437	pcg	1.22	exit (EXIT_FAILURE);
438	pcg	1.1	}
439	pcg	1.22
440	pcg	1.23	if (need_keys && ::thisnode
441			&& rsa_key && thisnode && thisnode->rsa_key)
442	pcg	1.22	if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0
443			\|\| BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0)
444			{
445			slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
446			exit (EXIT_FAILURE);
447			}
448	pcg	1.1
449			free (fname);
450			}
451
452			char configuration::config_filename (const char name, const char *dflt)
453			{
454			char *fname;
455
456			asprintf (&fname, name ? name : dflt, ::thisnode);
457
458			if (!ABSOLUTE_PATH (fname))
459			{
460			char *rname = fname;
461			asprintf (&fname, "%s/%s", confbase, rname);
462			free (rname);
463			}
464
465			return fname;
466			}
467
468			void
469			configuration::print ()
470			{
471			printf (_("\nConfiguration\n\n"));
472			printf (_("# of nodes: %d\n"), nodes.size ());
473			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
474			printf (_("MTU: %d\n"), mtu);
475			printf (_("rekeying interval: %d\n"), rekey);
476			printf (_("keepalive interval: %d\n"), keepalive);
477			printf (_("interface: %s\n"), ifname);
478			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
479	pcg	1.15	printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
480	pcg	1.1	printf ("\n");
481
482			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
483			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
484
485			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
486			(*i)->print ();
487
488			printf ("\n");
489			}
490
491	pcg	1.12	configuration::configuration ()
492			{
493	pcg	1.27	asprintf (&confbase, "%s/gvpe", CONFDIR);
494	pcg	1.26
495	pcg	1.12	init ();
496			}
497
498			configuration::~configuration ()
499	pcg	1.1	{
500	pcg	1.12	cleanup ();
501	pcg	1.1	}
502	pcg	1.12
503	pcg	1.1