gvpe/src/conf.C

/*
    conf.c -- configuration code
    Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
 
    This file is part of GVPE.

    GVPE 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 gvpe; 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 "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);
#if ENABLE_DNS
  free (domain);
  free (dns_hostname);
#endif
}

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   = 0;
  default_node.max_retry   = DEFAULT_MAX_RETRY;

#if ENABLE_DNS
  default_node.dns_port    = 0; // default is 0 == client
  dns_forw_host            = strdup ("127.0.0.1");
  dns_forw_port            = 53;
#endif

  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
#if ENABLE_DNS
  free (dns_forw_host); dns_forw_host = 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, skipping."),
                      var, fname, lineno);
              continue;
            }

          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, "dns-forw-host"))
            {
#if ENABLE_DNS
              free (dns_forw_host), dns_forw_host = strdup (val);
#endif
            }
          else if (!strcmp (var, "dns-forw-port"))
            {
#if ENABLE_DNS
              dns_forw_port = atoi (val);
#endif
            }
          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-hostname"))
            {
#if ENABLE_DNS
              free (node->dns_hostname), node->dns_hostname = strdup (val);
#endif
            }
          else if (!strcmp (var, "dns-port"))
            {
#if ENABLE_DNS
              node->dns_port = atoi (val);
#endif
            }
          else if (!strcmp (var, "dns-domain"))
            {
#if ENABLE_DNS
              free (node->domain), node->domain = strdup (val);
#endif
            }
          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, ignoring."),
                      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, skipping."),
                    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:	1.36
Committed:	Sun Mar 20 02:34:16 2005 UTC (19 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.35:	+7 -13 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2			conf.c -- configuration code
3	pcg	1.31	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
4	pcg	1.1
5	pcg	1.31	This file is part of GVPE.
6
7			GVPE is free software; you can redistribute it and/or modify
8	pcg	1.1	it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18	pcg	1.31	along with gvpe; if not, write to the Free Software
19	pcg	1.1	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20			*/
21
22			#include "config.h"
23
24			#include <cstdio>
25			#include <cstdlib>
26			#include <cstring>
27
28			#include <errno.h>
29			#include <netdb.h>
30			#include <sys/stat.h>
31			#include <sys/types.h>
32			#include <unistd.h>
33
34	pcg	1.17	#include "netcompat.h"
35	pcg	1.5
36	pcg	1.1	#include <openssl/err.h>
37			#include <openssl/pem.h>
38			#include <openssl/rsa.h>
39			#include <openssl/rand.h>
40	pcg	1.22	#include <openssl/bn.h>
41	pcg	1.1
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	1.30	#if ENABLE_DNS
99	pcg	1.28	free (domain);
100	pcg	1.30	free (dns_hostname);
101			#endif
102	pcg	1.1	}
103
104			void configuration::init ()
105			{
106			memset (this, 0, sizeof (*this));
107
108	pcg	1.19	mtu = DEFAULT_MTU;
109	pcg	1.1	rekey = DEFAULT_REKEY;
110			keepalive = DEFAULT_KEEPALIVE;
111	pcg	1.2	llevel = L_INFO;
112	pcg	1.5	ip_proto = IPPROTO_GRE;
113	pcg	1.16	#if ENABLE_ICMP
114	pcg	1.13	icmp_type = ICMP_ECHOREPLY;
115	pcg	1.16	#endif
116	pcg	1.1
117	pcg	1.5	default_node.udp_port = DEFAULT_UDPPORT;
118	pcg	1.24	default_node.tcp_port = DEFAULT_UDPPORT; // ehrm
119	pcg	1.1	default_node.connectmode = conf_node::C_ALWAYS;
120			default_node.compress = true;
121	pcg	1.29	default_node.protocols = 0;
122	pcg	1.27	default_node.max_retry = DEFAULT_MAX_RETRY;
123	pcg	1.25
124	pcg	1.30	#if ENABLE_DNS
125	pcg	1.32	default_node.dns_port = 0; // default is 0 == client
126	pcg	1.33	dns_forw_host = strdup ("127.0.0.1");
127	pcg	1.30	dns_forw_port = 53;
128			#endif
129
130	pcg	1.27	conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
131	pcg	1.1	}
132
133			void configuration::cleanup()
134			{
135			if (rsa_key)
136			RSA_free (rsa_key);
137
138	pcg	1.12	rsa_key = 0;
139	pcg	1.1
140	pcg	1.28	free (pidfilename); pidfilename = 0;
141			free (ifname); ifname = 0;
142	pcg	1.12	#if ENABLE_HTTP_PROXY
143	pcg	1.28	free (proxy_host); proxy_host = 0;
144			free (proxy_auth); proxy_auth = 0;
145			#endif
146			#if ENABLE_DNS
147			free (dns_forw_host); dns_forw_host = 0;
148	pcg	1.12	#endif
149	pcg	1.1	}
150
151			void
152			configuration::clear_config ()
153			{
154			for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
155			delete *i;
156
157			nodes.clear ();
158
159			cleanup ();
160			init ();
161			}
162
163	pcg	1.5	#define parse_bool(target,name,trueval,falseval) \
164			if (!strcmp (val, "yes")) target = trueval; \
165			else if (!strcmp (val, "no")) target = falseval; \
166			else if (!strcmp (val, "true")) target = trueval; \
167			else if (!strcmp (val, "false")) target = falseval; \
168			else if (!strcmp (val, "on")) target = trueval; \
169			else if (!strcmp (val, "off")) target = falseval; \
170			else \
171			slog (L_WARN, \
172			_("illegal value for '%s', only 'yes\|true\|on' or 'no\|false\|off' allowed, at '%s' line %d"), \
173			name, var, fname, lineno);
174
175	pcg	1.1	void configuration::read_config (bool need_keys)
176			{
177			char *fname;
178			FILE *f;
179
180			clear_config ();
181
182	pcg	1.27	asprintf (&fname, "%s/gvpe.conf", confbase);
183	pcg	1.1	f = fopen (fname, "r");
184
185			if (f)
186			{
187			char line[16384];
188			int lineno = 0;
189			char var, val;
190			conf_node *node = &default_node;
191
192			while (fgets (line, sizeof (line), f))
193			{
194			lineno++;
195
196			{
197			char *end = line + strlen (line);
198
199			while (*end < ' ' && end >= line)
200			end--;
201
202			*++end = 0;
203			}
204
205			char *tok = line;
206
207			retry:
208			var = strtok (tok, "\t =");
209			tok = 0;
210
211			if (!var \|\| !var[0])
212			continue; /* no tokens on this line */
213
214			if (var[0] == '#')
215			continue; /* comment: ignore */
216
217			val = strtok (NULL, "\t\n\r =");
218
219			if (!val \|\| val[0] == '#')
220			{
221			slog (L_WARN,
222	pcg	1.36	_("no value for variable `%s', at '%s' line %d, skipping."),
223	pcg	1.1	var, fname, lineno);
224	pcg	1.36	continue;
225	pcg	1.1	}
226
227			if (!strcmp (var, "on"))
228			{
229			if (!::thisnode
230			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
231			\|\| !strcmp (val, ::thisnode))
232			goto retry;
233
234			continue;
235			}
236
237			// truly global
238			if (!strcmp (var, "loglevel"))
239			{
240			loglevel l = string_to_loglevel (val);
241
242			if (l != L_NONE)
243	pcg	1.2	llevel = l;
244	pcg	1.1	else
245			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
246			}
247	pcg	1.5	else if (!strcmp (var, "ip-proto"))
248			ip_proto = atoi (val);
249	pcg	1.20	else if (!strcmp (var, "icmp-type"))
250			{
251	pcg	1.16	#if ENABLE_ICMP
252	pcg	1.20	icmp_type = atoi (val);
253	pcg	1.16	#endif
254	pcg	1.20	}
255	pcg	1.1
256			// per config
257			else if (!strcmp (var, "node"))
258			{
259			default_node.id++;
260
261			node = new conf_node (default_node);
262
263			nodes.push_back (node);
264
265			node->nodename = strdup (val);
266
267			{
268			char *fname;
269			FILE *f;
270
271			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
272
273			f = fopen (fname, "r");
274			if (f)
275			{
276			node->rsa_key = RSA_new ();
277
278			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
279			{
280			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
281			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
282	pcg	1.22	exit (EXIT_FAILURE);
283	pcg	1.1	}
284
285	pcg	1.22	require (RSA_blinding_on (node->rsa_key, 0));
286	pcg	1.1
287			fclose (f);
288			}
289			else
290			{
291			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
292
293			if (need_keys)
294	pcg	1.22	exit (EXIT_FAILURE);
295	pcg	1.1	}
296
297			free (fname);
298			}
299
300	pcg	1.23	if (::thisnode && !strcmp (node->nodename, ::thisnode))
301	pcg	1.1	thisnode = node;
302			}
303			else if (!strcmp (var, "private-key"))
304	pcg	1.24	free (prikeyfile), prikeyfile = strdup (val);
305	pcg	1.1	else if (!strcmp (var, "ifpersist"))
306	pcg	1.36	parse_bool (ifpersist, "ifpersist", true, false);
307	pcg	1.1	else if (!strcmp (var, "ifname"))
308	pcg	1.24	free (ifname), ifname = strdup (val);
309	pcg	1.1	else if (!strcmp (var, "rekey"))
310			rekey = atoi (val);
311			else if (!strcmp (var, "keepalive"))
312			keepalive = atoi (val);
313			else if (!strcmp (var, "mtu"))
314			mtu = atoi (val);
315			else if (!strcmp (var, "if-up"))
316	pcg	1.24	free (script_if_up), script_if_up = strdup (val);
317	pcg	1.1	else if (!strcmp (var, "node-up"))
318	pcg	1.24	free (script_node_up), script_node_up = strdup (val);
319	pcg	1.1	else if (!strcmp (var, "node-down"))
320	pcg	1.24	free (script_node_down), script_node_down = strdup (val);
321			else if (!strcmp (var, "pid-file"))
322			free (pidfilename), pidfilename = strdup (val);
323	pcg	1.34	else if (!strcmp (var, "dns-forw-host"))
324			{
325	pcg	1.30	#if ENABLE_DNS
326	pcg	1.34	free (dns_forw_host), dns_forw_host = strdup (val);
327			#endif
328			}
329	pcg	1.29	else if (!strcmp (var, "dns-forw-port"))
330	pcg	1.34	{
331			#if ENABLE_DNS
332			dns_forw_port = atoi (val);
333	pcg	1.28	#endif
334	pcg	1.34	}
335	pcg	1.20	else if (!strcmp (var, "http-proxy-host"))
336			{
337	pcg	1.12	#if ENABLE_HTTP_PROXY
338	pcg	1.24	free (proxy_host), proxy_host = strdup (val);
339	pcg	1.20	#endif
340			}
341	pcg	1.12	else if (!strcmp (var, "http-proxy-port"))
342	pcg	1.20	{
343			#if ENABLE_HTTP_PROXY
344			proxy_port = atoi (val);
345			#endif
346			}
347	pcg	1.12	else if (!strcmp (var, "http-proxy-auth"))
348	pcg	1.20	{
349			#if ENABLE_HTTP_PROXY
350			proxy_auth = (char )base64_encode ((const u8 )val, strlen (val));
351	pcg	1.12	#endif
352	pcg	1.20	}
353	pcg	1.1
354			/* node-specific, non-defaultable */
355			else if (node != &default_node && !strcmp (var, "hostname"))
356	pcg	1.24	free (node->hostname), node->hostname = strdup (val);
357	pcg	1.1
358			/* node-specific, defaultable */
359	pcg	1.4	else if (!strcmp (var, "udp-port"))
360	pcg	1.5	node->udp_port = atoi (val);
361	pcg	1.8	else if (!strcmp (var, "tcp-port"))
362			node->tcp_port = atoi (val);
363	pcg	1.34	else if (!strcmp (var, "dns-hostname"))
364			{
365	pcg	1.30	#if ENABLE_DNS
366	pcg	1.34	free (node->dns_hostname), node->dns_hostname = strdup (val);
367			#endif
368			}
369	pcg	1.24	else if (!strcmp (var, "dns-port"))
370	pcg	1.34	{
371			#if ENABLE_DNS
372			node->dns_port = atoi (val);
373			#endif
374			}
375	pcg	1.28	else if (!strcmp (var, "dns-domain"))
376	pcg	1.34	{
377			#if ENABLE_DNS
378			free (node->domain), node->domain = strdup (val);
379	pcg	1.28	#endif
380	pcg	1.34	}
381	pcg	1.1	else if (!strcmp (var, "router-priority"))
382			node->routerprio = atoi (val);
383	pcg	1.27	else if (!strcmp (var, "max-retry"))
384			node->max_retry = atoi (val);
385	pcg	1.1	else if (!strcmp (var, "connect"))
386			{
387			if (!strcmp (val, "ondemand"))
388			node->connectmode = conf_node::C_ONDEMAND;
389			else if (!strcmp (val, "never"))
390			node->connectmode = conf_node::C_NEVER;
391			else if (!strcmp (val, "always"))
392			node->connectmode = conf_node::C_ALWAYS;
393	pcg	1.4	else if (!strcmp (val, "disabled"))
394			node->connectmode = conf_node::C_DISABLED;
395	pcg	1.1	else
396			slog (L_WARN,
397	pcg	1.36	_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d, ignoring."),
398	pcg	1.27	var, fname, lineno);
399	pcg	1.1	}
400	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
401	pcg	1.36	parse_bool (node->inherit_tos, "inherit-tos", true, false);
402	pcg	1.1	else if (!strcmp (var, "compress"))
403	pcg	1.36	parse_bool (node->compress, "compress", true, false);
404	pcg	1.5	// all these bool options really really cost a lot of executable size!
405	pcg	1.8	else if (!strcmp (var, "enable-tcp"))
406			{
407	pcg	1.11	#if ENABLE_TCP
408	pcg	1.8	u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) \| v;
409	pcg	1.13	#endif
410			}
411			else if (!strcmp (var, "enable-icmp"))
412			{
413			#if ENABLE_ICMP
414			u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) \| v;
415	pcg	1.11	#endif
416	pcg	1.8	}
417	pcg	1.24	else if (!strcmp (var, "enable-dns"))
418			{
419			#if ENABLE_DNS
420			u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) \| v;
421			#endif
422			}
423	pcg	1.6	else if (!strcmp (var, "enable-udp"))
424	pcg	1.5	{
425	pcg	1.6	u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
426	pcg	1.5	}
427	pcg	1.6	else if (!strcmp (var, "enable-rawip"))
428	pcg	1.28	{
429	pcg	1.6	u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
430	pcg	1.1	}
431
432			// unknown or misplaced
433			else
434	pcg	1.12	slog (L_WARN,
435	pcg	1.36	_("unknown or misplaced variable `%s', at '%s' line %d, skipping."),
436	pcg	1.12	var, fname, lineno);
437	pcg	1.1	}
438
439			fclose (f);
440			}
441			else
442			{
443			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
444	pcg	1.22	exit (EXIT_FAILURE);
445	pcg	1.1	}
446
447			free (fname);
448
449			fname = config_filename (prikeyfile, "hostkey");
450
451			f = fopen (fname, "r");
452			if (f)
453			{
454			rsa_key = RSA_new ();
455
456			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
457			{
458			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
459			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
460	pcg	1.22	exit (EXIT_FAILURE);
461	pcg	1.1	}
462
463	pcg	1.22	require (RSA_blinding_on (rsa_key, 0));
464	pcg	1.1
465			fclose (f);
466			}
467			else
468			{
469			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
470
471			if (need_keys)
472	pcg	1.22	exit (EXIT_FAILURE);
473	pcg	1.1	}
474	pcg	1.22
475	pcg	1.23	if (need_keys && ::thisnode
476			&& rsa_key && thisnode && thisnode->rsa_key)
477	pcg	1.22	if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0
478			\|\| BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0)
479			{
480			slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
481			exit (EXIT_FAILURE);
482			}
483	pcg	1.1
484			free (fname);
485			}
486
487			char configuration::config_filename (const char name, const char *dflt)
488			{
489			char *fname;
490
491			asprintf (&fname, name ? name : dflt, ::thisnode);
492
493			if (!ABSOLUTE_PATH (fname))
494			{
495			char *rname = fname;
496			asprintf (&fname, "%s/%s", confbase, rname);
497			free (rname);
498			}
499
500			return fname;
501			}
502
503			void
504			configuration::print ()
505			{
506			printf (_("\nConfiguration\n\n"));
507			printf (_("# of nodes: %d\n"), nodes.size ());
508			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
509			printf (_("MTU: %d\n"), mtu);
510			printf (_("rekeying interval: %d\n"), rekey);
511			printf (_("keepalive interval: %d\n"), keepalive);
512			printf (_("interface: %s\n"), ifname);
513			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
514	pcg	1.15	printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
515	pcg	1.1	printf ("\n");
516
517			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
518			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
519
520			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
521			(*i)->print ();
522
523			printf ("\n");
524			}
525
526	pcg	1.12	configuration::configuration ()
527			{
528	pcg	1.27	asprintf (&confbase, "%s/gvpe", CONFDIR);
529	pcg	1.26
530	pcg	1.12	init ();
531			}
532
533			configuration::~configuration ()
534	pcg	1.1	{
535	pcg	1.12	cleanup ();
536	pcg	1.1	}
537	pcg	1.12
538	pcg	1.1