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 "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);
#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"),
                      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);
#if ENABLE_DNS
          else if (!strcmp (var, "dns-forw-host"))
            free (dns_forw_host), dns_forw_host = strdup (val);
          else if (!strcmp (var, "dns-forw-port"))
            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);
#if ENABLE_DNS
          else if (!strcmp (var, "dns-hostname"))
            free (node->dns_hostname), node->dns_hostname = strdup (val);
          else if (!strcmp (var, "dns-port"))
            node->dns_port = atoi (val);
          else if (!strcmp (var, "dns-domain"))
            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"),
                      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:	1.33
Committed:	Sun Mar 6 18:34:46 2005 UTC (19 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.32:	+2 -5 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 "gettext.h"
43
44			#include "conf.h"
45			#include "slog.h"
46			#include "util.h"
47
48			char *confbase;
49			char *thisnode;
50			char *identname;
51
52			struct configuration conf;
53
54	pcg	1.7	u8 best_protocol (u8 protset)
55			{
56	pcg	1.13	if (protset & PROT_IPv4 ) return PROT_IPv4;
57			if (protset & PROT_ICMPv4) return PROT_ICMPv4;
58			if (protset & PROT_UDPv4 ) return PROT_UDPv4;
59			if (protset & PROT_TCPv4 ) return PROT_TCPv4;
60	pcg	1.24	if (protset & PROT_DNSv4 ) return PROT_DNSv4;
61	pcg	1.7
62	pcg	1.9	return 0;
63	pcg	1.7	}
64
65			const char *strprotocol (u8 protocol)
66			{
67	pcg	1.13	if (protocol & PROT_IPv4 ) return "rawip";
68			if (protocol & PROT_ICMPv4) return "icmp";
69			if (protocol & PROT_UDPv4 ) return "udp";
70			if (protocol & PROT_TCPv4 ) return "tcp";
71	pcg	1.24	if (protocol & PROT_DNSv4 ) return "dns";
72	pcg	1.7
73			return "<unknown>";
74			}
75
76	pcg	1.12	void
77			conf_node::print ()
78	pcg	1.1	{
79	pcg	1.12	printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n",
80			id,
81			id >> 8, id & 0xff,
82			compress ? 'Y' : 'N',
83			connectmode == C_ONDEMAND ? "ondemand" :
84			connectmode == C_NEVER ? "never" :
85			connectmode == C_ALWAYS ? "always" : "",
86			nodename,
87			hostname ? hostname : "",
88			hostname ? ":" : "",
89			hostname ? udp_port : 0
90			);
91	pcg	1.1	}
92
93	pcg	1.12	conf_node::~conf_node ()
94	pcg	1.1	{
95	pcg	1.12	if (rsa_key)
96			RSA_free (rsa_key);
97
98			free (nodename);
99			free (hostname);
100	pcg	1.30	#if ENABLE_DNS
101	pcg	1.28	free (domain);
102	pcg	1.30	free (dns_hostname);
103			#endif
104	pcg	1.1	}
105
106			void configuration::init ()
107			{
108			memset (this, 0, sizeof (*this));
109
110	pcg	1.19	mtu = DEFAULT_MTU;
111	pcg	1.1	rekey = DEFAULT_REKEY;
112			keepalive = DEFAULT_KEEPALIVE;
113	pcg	1.2	llevel = L_INFO;
114	pcg	1.5	ip_proto = IPPROTO_GRE;
115	pcg	1.16	#if ENABLE_ICMP
116	pcg	1.13	icmp_type = ICMP_ECHOREPLY;
117	pcg	1.16	#endif
118	pcg	1.1
119	pcg	1.5	default_node.udp_port = DEFAULT_UDPPORT;
120	pcg	1.24	default_node.tcp_port = DEFAULT_UDPPORT; // ehrm
121	pcg	1.1	default_node.connectmode = conf_node::C_ALWAYS;
122			default_node.compress = true;
123	pcg	1.29	default_node.protocols = 0;
124	pcg	1.27	default_node.max_retry = DEFAULT_MAX_RETRY;
125	pcg	1.25
126	pcg	1.30	#if ENABLE_DNS
127	pcg	1.32	default_node.dns_port = 0; // default is 0 == client
128	pcg	1.33	dns_forw_host = strdup ("127.0.0.1");
129	pcg	1.30	dns_forw_port = 53;
130			#endif
131
132	pcg	1.27	conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
133	pcg	1.1	}
134
135			void configuration::cleanup()
136			{
137			if (rsa_key)
138			RSA_free (rsa_key);
139
140	pcg	1.12	rsa_key = 0;
141	pcg	1.1
142	pcg	1.28	free (pidfilename); pidfilename = 0;
143			free (ifname); ifname = 0;
144	pcg	1.12	#if ENABLE_HTTP_PROXY
145	pcg	1.28	free (proxy_host); proxy_host = 0;
146			free (proxy_auth); proxy_auth = 0;
147			#endif
148			#if ENABLE_DNS
149			free (dns_forw_host); dns_forw_host = 0;
150	pcg	1.12	#endif
151	pcg	1.1	}
152
153			void
154			configuration::clear_config ()
155			{
156			for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
157			delete *i;
158
159			nodes.clear ();
160
161			cleanup ();
162			init ();
163			}
164
165	pcg	1.5	#define parse_bool(target,name,trueval,falseval) \
166			if (!strcmp (val, "yes")) target = trueval; \
167			else if (!strcmp (val, "no")) target = falseval; \
168			else if (!strcmp (val, "true")) target = trueval; \
169			else if (!strcmp (val, "false")) target = falseval; \
170			else if (!strcmp (val, "on")) target = trueval; \
171			else if (!strcmp (val, "off")) target = falseval; \
172			else \
173			slog (L_WARN, \
174			_("illegal value for '%s', only 'yes\|true\|on' or 'no\|false\|off' allowed, at '%s' line %d"), \
175			name, var, fname, lineno);
176
177	pcg	1.1	void configuration::read_config (bool need_keys)
178			{
179			char *fname;
180			FILE *f;
181
182			clear_config ();
183
184	pcg	1.27	asprintf (&fname, "%s/gvpe.conf", confbase);
185	pcg	1.1	f = fopen (fname, "r");
186
187			if (f)
188			{
189			char line[16384];
190			int lineno = 0;
191			char var, val;
192			conf_node *node = &default_node;
193
194			while (fgets (line, sizeof (line), f))
195			{
196			lineno++;
197
198			{
199			char *end = line + strlen (line);
200
201			while (*end < ' ' && end >= line)
202			end--;
203
204			*++end = 0;
205			}
206
207			char *tok = line;
208
209			retry:
210			var = strtok (tok, "\t =");
211			tok = 0;
212
213			if (!var \|\| !var[0])
214			continue; /* no tokens on this line */
215
216			if (var[0] == '#')
217			continue; /* comment: ignore */
218
219			val = strtok (NULL, "\t\n\r =");
220
221			if (!val \|\| val[0] == '#')
222			{
223			slog (L_WARN,
224			_("no value for variable `%s', at '%s' line %d"),
225			var, fname, lineno);
226			break;
227			}
228
229			if (!strcmp (var, "on"))
230			{
231			if (!::thisnode
232			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
233			\|\| !strcmp (val, ::thisnode))
234			goto retry;
235
236			continue;
237			}
238
239			// truly global
240			if (!strcmp (var, "loglevel"))
241			{
242			loglevel l = string_to_loglevel (val);
243
244			if (l != L_NONE)
245	pcg	1.2	llevel = l;
246	pcg	1.1	else
247			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
248			}
249	pcg	1.5	else if (!strcmp (var, "ip-proto"))
250			ip_proto = atoi (val);
251	pcg	1.20	else if (!strcmp (var, "icmp-type"))
252			{
253	pcg	1.16	#if ENABLE_ICMP
254	pcg	1.20	icmp_type = atoi (val);
255	pcg	1.16	#endif
256	pcg	1.20	}
257	pcg	1.1
258			// per config
259			else if (!strcmp (var, "node"))
260			{
261			default_node.id++;
262
263			node = new conf_node (default_node);
264
265			nodes.push_back (node);
266
267			node->nodename = strdup (val);
268
269			{
270			char *fname;
271			FILE *f;
272
273			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
274
275			f = fopen (fname, "r");
276			if (f)
277			{
278			node->rsa_key = RSA_new ();
279
280			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
281			{
282			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
283			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
284	pcg	1.22	exit (EXIT_FAILURE);
285	pcg	1.1	}
286
287	pcg	1.22	require (RSA_blinding_on (node->rsa_key, 0));
288	pcg	1.1
289			fclose (f);
290			}
291			else
292			{
293			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
294
295			if (need_keys)
296	pcg	1.22	exit (EXIT_FAILURE);
297	pcg	1.1	}
298
299			free (fname);
300			}
301
302	pcg	1.23	if (::thisnode && !strcmp (node->nodename, ::thisnode))
303	pcg	1.1	thisnode = node;
304			}
305			else if (!strcmp (var, "private-key"))
306	pcg	1.24	free (prikeyfile), prikeyfile = strdup (val);
307	pcg	1.1	else if (!strcmp (var, "ifpersist"))
308			{
309	pcg	1.5	parse_bool (ifpersist, "ifpersist", true, false);
310	pcg	1.1	}
311			else if (!strcmp (var, "ifname"))
312	pcg	1.24	free (ifname), ifname = strdup (val);
313	pcg	1.1	else if (!strcmp (var, "rekey"))
314			rekey = atoi (val);
315			else if (!strcmp (var, "keepalive"))
316			keepalive = atoi (val);
317			else if (!strcmp (var, "mtu"))
318			mtu = atoi (val);
319			else if (!strcmp (var, "if-up"))
320	pcg	1.24	free (script_if_up), script_if_up = strdup (val);
321	pcg	1.1	else if (!strcmp (var, "node-up"))
322	pcg	1.24	free (script_node_up), script_node_up = strdup (val);
323	pcg	1.1	else if (!strcmp (var, "node-down"))
324	pcg	1.24	free (script_node_down), script_node_down = strdup (val);
325			else if (!strcmp (var, "pid-file"))
326			free (pidfilename), pidfilename = strdup (val);
327	pcg	1.30	#if ENABLE_DNS
328	pcg	1.29	else if (!strcmp (var, "dns-forw-host"))
329	pcg	1.30	free (dns_forw_host), dns_forw_host = strdup (val);
330	pcg	1.29	else if (!strcmp (var, "dns-forw-port"))
331	pcg	1.30	dns_forw_port = atoi (val);
332	pcg	1.28	#endif
333	pcg	1.20	else if (!strcmp (var, "http-proxy-host"))
334			{
335	pcg	1.12	#if ENABLE_HTTP_PROXY
336	pcg	1.24	free (proxy_host), proxy_host = strdup (val);
337	pcg	1.20	#endif
338			}
339	pcg	1.12	else if (!strcmp (var, "http-proxy-port"))
340	pcg	1.20	{
341			#if ENABLE_HTTP_PROXY
342			proxy_port = atoi (val);
343			#endif
344			}
345	pcg	1.12	else if (!strcmp (var, "http-proxy-auth"))
346	pcg	1.20	{
347			#if ENABLE_HTTP_PROXY
348			proxy_auth = (char )base64_encode ((const u8 )val, strlen (val));
349	pcg	1.12	#endif
350	pcg	1.20	}
351	pcg	1.1
352			/* node-specific, non-defaultable */
353			else if (node != &default_node && !strcmp (var, "hostname"))
354	pcg	1.24	free (node->hostname), node->hostname = strdup (val);
355	pcg	1.1
356			/* node-specific, defaultable */
357	pcg	1.4	else if (!strcmp (var, "udp-port"))
358	pcg	1.5	node->udp_port = atoi (val);
359	pcg	1.8	else if (!strcmp (var, "tcp-port"))
360			node->tcp_port = atoi (val);
361	pcg	1.30	#if ENABLE_DNS
362			else if (!strcmp (var, "dns-hostname"))
363			free (node->dns_hostname), node->dns_hostname = strdup (val);
364	pcg	1.24	else if (!strcmp (var, "dns-port"))
365	pcg	1.30	node->dns_port = atoi (val);
366	pcg	1.28	else if (!strcmp (var, "dns-domain"))
367	pcg	1.33	free (node->domain), node->domain = strdup (val);
368	pcg	1.28	#endif
369	pcg	1.1	else if (!strcmp (var, "router-priority"))
370			node->routerprio = atoi (val);
371	pcg	1.27	else if (!strcmp (var, "max-retry"))
372			node->max_retry = atoi (val);
373	pcg	1.1	else if (!strcmp (var, "connect"))
374			{
375			if (!strcmp (val, "ondemand"))
376			node->connectmode = conf_node::C_ONDEMAND;
377			else if (!strcmp (val, "never"))
378			node->connectmode = conf_node::C_NEVER;
379			else if (!strcmp (val, "always"))
380			node->connectmode = conf_node::C_ALWAYS;
381	pcg	1.4	else if (!strcmp (val, "disabled"))
382			node->connectmode = conf_node::C_DISABLED;
383	pcg	1.1	else
384			slog (L_WARN,
385	pcg	1.27	_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"),
386			var, fname, lineno);
387	pcg	1.1	}
388	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
389			{
390	pcg	1.5	parse_bool (node->inherit_tos, "inherit-tos", true, false);
391	pcg	1.3	}
392	pcg	1.1	else if (!strcmp (var, "compress"))
393			{
394	pcg	1.5	parse_bool (node->compress, "compress", true, false);
395			}
396			// all these bool options really really cost a lot of executable size!
397	pcg	1.8	else if (!strcmp (var, "enable-tcp"))
398			{
399	pcg	1.11	#if ENABLE_TCP
400	pcg	1.8	u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) \| v;
401	pcg	1.13	#endif
402			}
403			else if (!strcmp (var, "enable-icmp"))
404			{
405			#if ENABLE_ICMP
406			u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) \| v;
407	pcg	1.11	#endif
408	pcg	1.8	}
409	pcg	1.24	else if (!strcmp (var, "enable-dns"))
410			{
411			#if ENABLE_DNS
412			u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) \| v;
413			#endif
414			}
415	pcg	1.6	else if (!strcmp (var, "enable-udp"))
416	pcg	1.5	{
417	pcg	1.6	u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
418	pcg	1.5	}
419	pcg	1.6	else if (!strcmp (var, "enable-rawip"))
420	pcg	1.28	{
421	pcg	1.6	u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
422	pcg	1.1	}
423
424			// unknown or misplaced
425			else
426	pcg	1.12	slog (L_WARN,
427			_("unknown or misplaced variable `%s', at '%s' line %d"),
428			var, fname, lineno);
429	pcg	1.1	}
430
431			fclose (f);
432			}
433			else
434			{
435			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
436	pcg	1.22	exit (EXIT_FAILURE);
437	pcg	1.1	}
438
439			free (fname);
440
441			fname = config_filename (prikeyfile, "hostkey");
442
443			f = fopen (fname, "r");
444			if (f)
445			{
446			rsa_key = RSA_new ();
447
448			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
449			{
450			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
451			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
452	pcg	1.22	exit (EXIT_FAILURE);
453	pcg	1.1	}
454
455	pcg	1.22	require (RSA_blinding_on (rsa_key, 0));
456	pcg	1.1
457			fclose (f);
458			}
459			else
460			{
461			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
462
463			if (need_keys)
464	pcg	1.22	exit (EXIT_FAILURE);
465	pcg	1.1	}
466	pcg	1.22
467	pcg	1.23	if (need_keys && ::thisnode
468			&& rsa_key && thisnode && thisnode->rsa_key)
469	pcg	1.22	if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0
470			\|\| BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0)
471			{
472			slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
473			exit (EXIT_FAILURE);
474			}
475	pcg	1.1
476			free (fname);
477			}
478
479			char configuration::config_filename (const char name, const char *dflt)
480			{
481			char *fname;
482
483			asprintf (&fname, name ? name : dflt, ::thisnode);
484
485			if (!ABSOLUTE_PATH (fname))
486			{
487			char *rname = fname;
488			asprintf (&fname, "%s/%s", confbase, rname);
489			free (rname);
490			}
491
492			return fname;
493			}
494
495			void
496			configuration::print ()
497			{
498			printf (_("\nConfiguration\n\n"));
499			printf (_("# of nodes: %d\n"), nodes.size ());
500			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
501			printf (_("MTU: %d\n"), mtu);
502			printf (_("rekeying interval: %d\n"), rekey);
503			printf (_("keepalive interval: %d\n"), keepalive);
504			printf (_("interface: %s\n"), ifname);
505			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
506	pcg	1.15	printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
507	pcg	1.1	printf ("\n");
508
509			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
510			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
511
512			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
513			(*i)->print ();
514
515			printf ("\n");
516			}
517
518	pcg	1.12	configuration::configuration ()
519			{
520	pcg	1.27	asprintf (&confbase, "%s/gvpe", CONFDIR);
521	pcg	1.26
522	pcg	1.12	init ();
523			}
524
525			configuration::~configuration ()
526	pcg	1.1	{
527	pcg	1.12	cleanup ();
528	pcg	1.1	}
529	pcg	1.12
530	pcg	1.1