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 ()
{
  asprintf (&confbase, "%s/vpe", CONFDIR);

  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;

  conf.pidfilename = strdup (LOCALSTATEDIR "/run/vped.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/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"))
            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, "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 ()
{
  init ();
}

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


Revision:	1.25
Committed:	Mon May 10 20:13:09 2004 UTC (20 years ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	VPE_1_6
Changes since 1.24:	+4 -0 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	pcg	1.25	asprintf (&confbase, "%s/vpe", CONFDIR);
103
104	pcg	1.1	memset (this, 0, sizeof (*this));
105
106	pcg	1.19	mtu = DEFAULT_MTU;
107	pcg	1.1	rekey = DEFAULT_REKEY;
108			keepalive = DEFAULT_KEEPALIVE;
109	pcg	1.2	llevel = L_INFO;
110	pcg	1.5	ip_proto = IPPROTO_GRE;
111	pcg	1.16	#if ENABLE_ICMP
112	pcg	1.13	icmp_type = ICMP_ECHOREPLY;
113	pcg	1.16	#endif
114	pcg	1.1
115	pcg	1.5	default_node.udp_port = DEFAULT_UDPPORT;
116	pcg	1.24	default_node.tcp_port = DEFAULT_UDPPORT; // ehrm
117	pcg	1.1	default_node.connectmode = conf_node::C_ALWAYS;
118			default_node.compress = true;
119	pcg	1.6	default_node.protocols = PROT_UDPv4;
120	pcg	1.25
121			conf.pidfilename = strdup (LOCALSTATEDIR "/run/vped.pid");
122	pcg	1.1	}
123
124			void configuration::cleanup()
125			{
126			if (rsa_key)
127			RSA_free (rsa_key);
128
129	pcg	1.12	rsa_key = 0;
130	pcg	1.1
131	pcg	1.24	free (pidfilename); pidfilename = 0;
132			free (ifname); ifname = 0;
133	pcg	1.12	#if ENABLE_HTTP_PROXY
134	pcg	1.24	free (proxy_host); proxy_host = 0;
135			free (proxy_auth); proxy_auth = 0;
136	pcg	1.12	#endif
137	pcg	1.1	}
138
139			void
140			configuration::clear_config ()
141			{
142			for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
143			delete *i;
144
145			nodes.clear ();
146
147			cleanup ();
148			init ();
149			}
150
151	pcg	1.5	#define parse_bool(target,name,trueval,falseval) \
152			if (!strcmp (val, "yes")) target = trueval; \
153			else if (!strcmp (val, "no")) target = falseval; \
154			else if (!strcmp (val, "true")) target = trueval; \
155			else if (!strcmp (val, "false")) target = falseval; \
156			else if (!strcmp (val, "on")) target = trueval; \
157			else if (!strcmp (val, "off")) target = falseval; \
158			else \
159			slog (L_WARN, \
160			_("illegal value for '%s', only 'yes\|true\|on' or 'no\|false\|off' allowed, at '%s' line %d"), \
161			name, var, fname, lineno);
162
163	pcg	1.1	void configuration::read_config (bool need_keys)
164			{
165			char *fname;
166			FILE *f;
167
168			clear_config ();
169
170			asprintf (&fname, "%s/vped.conf", confbase);
171			f = fopen (fname, "r");
172
173			if (f)
174			{
175			char line[16384];
176			int lineno = 0;
177			char var, val;
178			conf_node *node = &default_node;
179
180			while (fgets (line, sizeof (line), f))
181			{
182			lineno++;
183
184			{
185			char *end = line + strlen (line);
186
187			while (*end < ' ' && end >= line)
188			end--;
189
190			*++end = 0;
191			}
192
193			char *tok = line;
194
195			retry:
196			var = strtok (tok, "\t =");
197			tok = 0;
198
199			if (!var \|\| !var[0])
200			continue; /* no tokens on this line */
201
202			if (var[0] == '#')
203			continue; /* comment: ignore */
204
205			val = strtok (NULL, "\t\n\r =");
206
207			if (!val \|\| val[0] == '#')
208			{
209			slog (L_WARN,
210			_("no value for variable `%s', at '%s' line %d"),
211			var, fname, lineno);
212			break;
213			}
214
215			if (!strcmp (var, "on"))
216			{
217			if (!::thisnode
218			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
219			\|\| !strcmp (val, ::thisnode))
220			goto retry;
221
222			continue;
223			}
224
225			// truly global
226			if (!strcmp (var, "loglevel"))
227			{
228			loglevel l = string_to_loglevel (val);
229
230			if (l != L_NONE)
231	pcg	1.2	llevel = l;
232	pcg	1.1	else
233			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
234			}
235	pcg	1.5	else if (!strcmp (var, "ip-proto"))
236			ip_proto = atoi (val);
237	pcg	1.20	else if (!strcmp (var, "icmp-type"))
238			{
239	pcg	1.16	#if ENABLE_ICMP
240	pcg	1.20	icmp_type = atoi (val);
241	pcg	1.16	#endif
242	pcg	1.20	}
243	pcg	1.1
244			// per config
245			else if (!strcmp (var, "node"))
246			{
247			default_node.id++;
248
249			node = new conf_node (default_node);
250
251			nodes.push_back (node);
252
253			node->nodename = strdup (val);
254
255			{
256			char *fname;
257			FILE *f;
258
259			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
260
261			f = fopen (fname, "r");
262			if (f)
263			{
264			node->rsa_key = RSA_new ();
265
266			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
267			{
268			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
269			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
270	pcg	1.22	exit (EXIT_FAILURE);
271	pcg	1.1	}
272
273	pcg	1.22	require (RSA_blinding_on (node->rsa_key, 0));
274	pcg	1.1
275			fclose (f);
276			}
277			else
278			{
279			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
280
281			if (need_keys)
282	pcg	1.22	exit (EXIT_FAILURE);
283	pcg	1.1	}
284
285			free (fname);
286			}
287
288	pcg	1.23	if (::thisnode && !strcmp (node->nodename, ::thisnode))
289	pcg	1.1	thisnode = node;
290			}
291			else if (!strcmp (var, "private-key"))
292	pcg	1.24	free (prikeyfile), prikeyfile = strdup (val);
293	pcg	1.1	else if (!strcmp (var, "ifpersist"))
294			{
295	pcg	1.5	parse_bool (ifpersist, "ifpersist", true, false);
296	pcg	1.1	}
297			else if (!strcmp (var, "ifname"))
298	pcg	1.24	free (ifname), ifname = strdup (val);
299	pcg	1.1	else if (!strcmp (var, "rekey"))
300			rekey = atoi (val);
301			else if (!strcmp (var, "keepalive"))
302			keepalive = atoi (val);
303			else if (!strcmp (var, "mtu"))
304			mtu = atoi (val);
305			else if (!strcmp (var, "if-up"))
306	pcg	1.24	free (script_if_up), script_if_up = strdup (val);
307	pcg	1.1	else if (!strcmp (var, "node-up"))
308	pcg	1.24	free (script_node_up), script_node_up = strdup (val);
309	pcg	1.1	else if (!strcmp (var, "node-down"))
310	pcg	1.24	free (script_node_down), script_node_down = strdup (val);
311			else if (!strcmp (var, "pid-file"))
312			free (pidfilename), pidfilename = strdup (val);
313	pcg	1.20	else if (!strcmp (var, "http-proxy-host"))
314			{
315	pcg	1.12	#if ENABLE_HTTP_PROXY
316	pcg	1.24	free (proxy_host), proxy_host = strdup (val);
317	pcg	1.20	#endif
318			}
319	pcg	1.12	else if (!strcmp (var, "http-proxy-port"))
320	pcg	1.20	{
321			#if ENABLE_HTTP_PROXY
322			proxy_port = atoi (val);
323			#endif
324			}
325	pcg	1.12	else if (!strcmp (var, "http-proxy-auth"))
326	pcg	1.20	{
327			#if ENABLE_HTTP_PROXY
328			proxy_auth = (char )base64_encode ((const u8 )val, strlen (val));
329	pcg	1.12	#endif
330	pcg	1.20	}
331	pcg	1.1
332			/* node-specific, non-defaultable */
333			else if (node != &default_node && !strcmp (var, "hostname"))
334	pcg	1.24	free (node->hostname), node->hostname = strdup (val);
335	pcg	1.1
336			/* node-specific, defaultable */
337	pcg	1.4	else if (!strcmp (var, "udp-port"))
338	pcg	1.5	node->udp_port = atoi (val);
339	pcg	1.8	else if (!strcmp (var, "tcp-port"))
340			node->tcp_port = atoi (val);
341	pcg	1.24	else if (!strcmp (var, "dns-port"))
342			node->dns_port = atoi (val);
343	pcg	1.1	else if (!strcmp (var, "router-priority"))
344			node->routerprio = atoi (val);
345			else if (!strcmp (var, "connect"))
346			{
347			if (!strcmp (val, "ondemand"))
348			node->connectmode = conf_node::C_ONDEMAND;
349			else if (!strcmp (val, "never"))
350			node->connectmode = conf_node::C_NEVER;
351			else if (!strcmp (val, "always"))
352			node->connectmode = conf_node::C_ALWAYS;
353	pcg	1.4	else if (!strcmp (val, "disabled"))
354			node->connectmode = conf_node::C_DISABLED;
355	pcg	1.1	else
356			slog (L_WARN,
357	pcg	1.4	_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
358	pcg	1.1	var, fname, lineno);
359			}
360	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
361			{
362	pcg	1.5	parse_bool (node->inherit_tos, "inherit-tos", true, false);
363	pcg	1.3	}
364	pcg	1.1	else if (!strcmp (var, "compress"))
365			{
366	pcg	1.5	parse_bool (node->compress, "compress", true, false);
367			}
368			// all these bool options really really cost a lot of executable size!
369	pcg	1.8	else if (!strcmp (var, "enable-tcp"))
370			{
371	pcg	1.11	#if ENABLE_TCP
372	pcg	1.8	u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) \| v;
373	pcg	1.13	#endif
374			}
375			else if (!strcmp (var, "enable-icmp"))
376			{
377			#if ENABLE_ICMP
378			u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) \| v;
379	pcg	1.11	#endif
380	pcg	1.8	}
381	pcg	1.24	else if (!strcmp (var, "enable-dns"))
382			{
383			#if ENABLE_DNS
384			u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) \| v;
385			#endif
386			}
387	pcg	1.6	else if (!strcmp (var, "enable-udp"))
388	pcg	1.5	{
389	pcg	1.6	u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
390	pcg	1.5	}
391	pcg	1.6	else if (!strcmp (var, "enable-rawip"))
392	pcg	1.24	{;
393	pcg	1.6	u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
394	pcg	1.1	}
395
396			// unknown or misplaced
397			else
398	pcg	1.12	slog (L_WARN,
399			_("unknown or misplaced variable `%s', at '%s' line %d"),
400			var, fname, lineno);
401	pcg	1.1	}
402
403			fclose (f);
404			}
405			else
406			{
407			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
408	pcg	1.22	exit (EXIT_FAILURE);
409	pcg	1.1	}
410
411			free (fname);
412
413			fname = config_filename (prikeyfile, "hostkey");
414
415			f = fopen (fname, "r");
416			if (f)
417			{
418			rsa_key = RSA_new ();
419
420			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
421			{
422			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
423			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
424	pcg	1.22	exit (EXIT_FAILURE);
425	pcg	1.1	}
426
427	pcg	1.22	require (RSA_blinding_on (rsa_key, 0));
428	pcg	1.1
429			fclose (f);
430			}
431			else
432			{
433			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
434
435			if (need_keys)
436	pcg	1.22	exit (EXIT_FAILURE);
437	pcg	1.1	}
438	pcg	1.22
439	pcg	1.23	if (need_keys && ::thisnode
440			&& rsa_key && thisnode && thisnode->rsa_key)
441	pcg	1.22	if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0
442			\|\| BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0)
443			{
444			slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
445			exit (EXIT_FAILURE);
446			}
447	pcg	1.1
448			free (fname);
449			}
450
451			char configuration::config_filename (const char name, const char *dflt)
452			{
453			char *fname;
454
455			asprintf (&fname, name ? name : dflt, ::thisnode);
456
457			if (!ABSOLUTE_PATH (fname))
458			{
459			char *rname = fname;
460			asprintf (&fname, "%s/%s", confbase, rname);
461			free (rname);
462			}
463
464			return fname;
465			}
466
467			void
468			configuration::print ()
469			{
470			printf (_("\nConfiguration\n\n"));
471			printf (_("# of nodes: %d\n"), nodes.size ());
472			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
473			printf (_("MTU: %d\n"), mtu);
474			printf (_("rekeying interval: %d\n"), rekey);
475			printf (_("keepalive interval: %d\n"), keepalive);
476			printf (_("interface: %s\n"), ifname);
477			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
478	pcg	1.15	printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
479	pcg	1.1	printf ("\n");
480
481			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
482			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
483
484			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
485			(*i)->print ();
486
487			printf ("\n");
488			}
489
490	pcg	1.12	configuration::configuration ()
491			{
492			init ();
493			}
494
495			configuration::~configuration ()
496	pcg	1.1	{
497	pcg	1.12	cleanup ();
498	pcg	1.1	}
499	pcg	1.12
500	pcg	1.1