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) do {           \
  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);                           \
} while (0)

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:	1.37
Committed:	Wed Mar 23 14:33:34 2005 UTC (19 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.36:	+4 -3 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	1.37	#define parse_bool(target,name,trueval,falseval) do { \
164			if (!strcmp (val, "yes")) target = trueval; \
165	pcg	1.5	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	pcg	1.37	name, var, fname, lineno); \
174			} while (0)
175	pcg	1.5
176	pcg	1.1	void configuration::read_config (bool need_keys)
177			{
178			char *fname;
179			FILE *f;
180
181			clear_config ();
182
183	pcg	1.27	asprintf (&fname, "%s/gvpe.conf", confbase);
184	pcg	1.1	f = fopen (fname, "r");
185
186			if (f)
187			{
188			char line[16384];
189			int lineno = 0;
190			char var, val;
191			conf_node *node = &default_node;
192
193			while (fgets (line, sizeof (line), f))
194			{
195			lineno++;
196
197			{
198			char *end = line + strlen (line);
199
200			while (*end < ' ' && end >= line)
201			end--;
202
203			*++end = 0;
204			}
205
206			char *tok = line;
207
208			retry:
209			var = strtok (tok, "\t =");
210			tok = 0;
211
212			if (!var \|\| !var[0])
213			continue; /* no tokens on this line */
214
215			if (var[0] == '#')
216			continue; /* comment: ignore */
217
218			val = strtok (NULL, "\t\n\r =");
219
220			if (!val \|\| val[0] == '#')
221			{
222			slog (L_WARN,
223	pcg	1.36	_("no value for variable `%s', at '%s' line %d, skipping."),
224	pcg	1.1	var, fname, lineno);
225	pcg	1.36	continue;
226	pcg	1.1	}
227
228			if (!strcmp (var, "on"))
229			{
230			if (!::thisnode
231			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
232			\|\| !strcmp (val, ::thisnode))
233			goto retry;
234
235			continue;
236			}
237
238			// truly global
239			if (!strcmp (var, "loglevel"))
240			{
241			loglevel l = string_to_loglevel (val);
242
243			if (l != L_NONE)
244	pcg	1.2	llevel = l;
245	pcg	1.1	else
246			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
247			}
248	pcg	1.5	else if (!strcmp (var, "ip-proto"))
249			ip_proto = atoi (val);
250	pcg	1.20	else if (!strcmp (var, "icmp-type"))
251			{
252	pcg	1.16	#if ENABLE_ICMP
253	pcg	1.20	icmp_type = atoi (val);
254	pcg	1.16	#endif
255	pcg	1.20	}
256	pcg	1.1
257			// per config
258			else if (!strcmp (var, "node"))
259			{
260			default_node.id++;
261
262			node = new conf_node (default_node);
263
264			nodes.push_back (node);
265
266			node->nodename = strdup (val);
267
268			{
269			char *fname;
270			FILE *f;
271
272			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
273
274			f = fopen (fname, "r");
275			if (f)
276			{
277			node->rsa_key = RSA_new ();
278
279			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
280			{
281			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
282			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
283	pcg	1.22	exit (EXIT_FAILURE);
284	pcg	1.1	}
285
286	pcg	1.22	require (RSA_blinding_on (node->rsa_key, 0));
287	pcg	1.1
288			fclose (f);
289			}
290			else
291			{
292			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
293
294			if (need_keys)
295	pcg	1.22	exit (EXIT_FAILURE);
296	pcg	1.1	}
297
298			free (fname);
299			}
300
301	pcg	1.23	if (::thisnode && !strcmp (node->nodename, ::thisnode))
302	pcg	1.1	thisnode = node;
303			}
304			else if (!strcmp (var, "private-key"))
305	pcg	1.24	free (prikeyfile), prikeyfile = strdup (val);
306	pcg	1.1	else if (!strcmp (var, "ifpersist"))
307	pcg	1.36	parse_bool (ifpersist, "ifpersist", true, false);
308	pcg	1.1	else if (!strcmp (var, "ifname"))
309	pcg	1.24	free (ifname), ifname = strdup (val);
310	pcg	1.1	else if (!strcmp (var, "rekey"))
311			rekey = atoi (val);
312			else if (!strcmp (var, "keepalive"))
313			keepalive = atoi (val);
314			else if (!strcmp (var, "mtu"))
315			mtu = atoi (val);
316			else if (!strcmp (var, "if-up"))
317	pcg	1.24	free (script_if_up), script_if_up = strdup (val);
318	pcg	1.1	else if (!strcmp (var, "node-up"))
319	pcg	1.24	free (script_node_up), script_node_up = strdup (val);
320	pcg	1.1	else if (!strcmp (var, "node-down"))
321	pcg	1.24	free (script_node_down), script_node_down = strdup (val);
322			else if (!strcmp (var, "pid-file"))
323			free (pidfilename), pidfilename = strdup (val);
324	pcg	1.34	else if (!strcmp (var, "dns-forw-host"))
325			{
326	pcg	1.30	#if ENABLE_DNS
327	pcg	1.34	free (dns_forw_host), dns_forw_host = strdup (val);
328			#endif
329			}
330	pcg	1.29	else if (!strcmp (var, "dns-forw-port"))
331	pcg	1.34	{
332			#if ENABLE_DNS
333			dns_forw_port = atoi (val);
334	pcg	1.28	#endif
335	pcg	1.34	}
336	pcg	1.20	else if (!strcmp (var, "http-proxy-host"))
337			{
338	pcg	1.12	#if ENABLE_HTTP_PROXY
339	pcg	1.24	free (proxy_host), proxy_host = strdup (val);
340	pcg	1.20	#endif
341			}
342	pcg	1.12	else if (!strcmp (var, "http-proxy-port"))
343	pcg	1.20	{
344			#if ENABLE_HTTP_PROXY
345			proxy_port = atoi (val);
346			#endif
347			}
348	pcg	1.12	else if (!strcmp (var, "http-proxy-auth"))
349	pcg	1.20	{
350			#if ENABLE_HTTP_PROXY
351			proxy_auth = (char )base64_encode ((const u8 )val, strlen (val));
352	pcg	1.12	#endif
353	pcg	1.20	}
354	pcg	1.1
355			/* node-specific, non-defaultable */
356			else if (node != &default_node && !strcmp (var, "hostname"))
357	pcg	1.24	free (node->hostname), node->hostname = strdup (val);
358	pcg	1.1
359			/* node-specific, defaultable */
360	pcg	1.4	else if (!strcmp (var, "udp-port"))
361	pcg	1.5	node->udp_port = atoi (val);
362	pcg	1.8	else if (!strcmp (var, "tcp-port"))
363			node->tcp_port = atoi (val);
364	pcg	1.34	else if (!strcmp (var, "dns-hostname"))
365			{
366	pcg	1.30	#if ENABLE_DNS
367	pcg	1.34	free (node->dns_hostname), node->dns_hostname = strdup (val);
368			#endif
369			}
370	pcg	1.24	else if (!strcmp (var, "dns-port"))
371	pcg	1.34	{
372			#if ENABLE_DNS
373			node->dns_port = atoi (val);
374			#endif
375			}
376	pcg	1.28	else if (!strcmp (var, "dns-domain"))
377	pcg	1.34	{
378			#if ENABLE_DNS
379			free (node->domain), node->domain = strdup (val);
380	pcg	1.28	#endif
381	pcg	1.34	}
382	pcg	1.1	else if (!strcmp (var, "router-priority"))
383			node->routerprio = atoi (val);
384	pcg	1.27	else if (!strcmp (var, "max-retry"))
385			node->max_retry = atoi (val);
386	pcg	1.1	else if (!strcmp (var, "connect"))
387			{
388			if (!strcmp (val, "ondemand"))
389			node->connectmode = conf_node::C_ONDEMAND;
390			else if (!strcmp (val, "never"))
391			node->connectmode = conf_node::C_NEVER;
392			else if (!strcmp (val, "always"))
393			node->connectmode = conf_node::C_ALWAYS;
394	pcg	1.4	else if (!strcmp (val, "disabled"))
395			node->connectmode = conf_node::C_DISABLED;
396	pcg	1.1	else
397			slog (L_WARN,
398	pcg	1.36	_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d, ignoring."),
399	pcg	1.27	var, fname, lineno);
400	pcg	1.1	}
401	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
402	pcg	1.36	parse_bool (node->inherit_tos, "inherit-tos", true, false);
403	pcg	1.1	else if (!strcmp (var, "compress"))
404	pcg	1.36	parse_bool (node->compress, "compress", true, false);
405	pcg	1.5	// all these bool options really really cost a lot of executable size!
406	pcg	1.8	else if (!strcmp (var, "enable-tcp"))
407			{
408	pcg	1.11	#if ENABLE_TCP
409	pcg	1.8	u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) \| v;
410	pcg	1.13	#endif
411			}
412			else if (!strcmp (var, "enable-icmp"))
413			{
414			#if ENABLE_ICMP
415			u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) \| v;
416	pcg	1.11	#endif
417	pcg	1.8	}
418	pcg	1.24	else if (!strcmp (var, "enable-dns"))
419			{
420			#if ENABLE_DNS
421			u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) \| v;
422			#endif
423			}
424	pcg	1.6	else if (!strcmp (var, "enable-udp"))
425	pcg	1.5	{
426	pcg	1.6	u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
427	pcg	1.5	}
428	pcg	1.6	else if (!strcmp (var, "enable-rawip"))
429	pcg	1.28	{
430	pcg	1.6	u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
431	pcg	1.1	}
432
433			// unknown or misplaced
434			else
435	pcg	1.12	slog (L_WARN,
436	pcg	1.36	_("unknown or misplaced variable `%s', at '%s' line %d, skipping."),
437	pcg	1.12	var, fname, lineno);
438	pcg	1.1	}
439
440			fclose (f);
441			}
442			else
443			{
444			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
445	pcg	1.22	exit (EXIT_FAILURE);
446	pcg	1.1	}
447
448			free (fname);
449
450			fname = config_filename (prikeyfile, "hostkey");
451
452			f = fopen (fname, "r");
453			if (f)
454			{
455			rsa_key = RSA_new ();
456
457			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
458			{
459			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
460			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
461	pcg	1.22	exit (EXIT_FAILURE);
462	pcg	1.1	}
463
464	pcg	1.22	require (RSA_blinding_on (rsa_key, 0));
465	pcg	1.1
466			fclose (f);
467			}
468			else
469			{
470			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
471
472			if (need_keys)
473	pcg	1.22	exit (EXIT_FAILURE);
474	pcg	1.1	}
475	pcg	1.22
476	pcg	1.23	if (need_keys && ::thisnode
477			&& rsa_key && thisnode && thisnode->rsa_key)
478	pcg	1.22	if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0
479			\|\| BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0)
480			{
481			slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
482			exit (EXIT_FAILURE);
483			}
484	pcg	1.1
485			free (fname);
486			}
487
488			char configuration::config_filename (const char name, const char *dflt)
489			{
490			char *fname;
491
492			asprintf (&fname, name ? name : dflt, ::thisnode);
493
494			if (!ABSOLUTE_PATH (fname))
495			{
496			char *rname = fname;
497			asprintf (&fname, "%s/%s", confbase, rname);
498			free (rname);
499			}
500
501			return fname;
502			}
503
504			void
505			configuration::print ()
506			{
507			printf (_("\nConfiguration\n\n"));
508			printf (_("# of nodes: %d\n"), nodes.size ());
509			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
510			printf (_("MTU: %d\n"), mtu);
511			printf (_("rekeying interval: %d\n"), rekey);
512			printf (_("keepalive interval: %d\n"), keepalive);
513			printf (_("interface: %s\n"), ifname);
514			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
515	pcg	1.15	printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
516	pcg	1.1	printf ("\n");
517
518			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
519			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
520
521			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
522			(*i)->print ();
523
524			printf ("\n");
525			}
526
527	pcg	1.12	configuration::configuration ()
528			{
529	pcg	1.27	asprintf (&confbase, "%s/gvpe", CONFDIR);
530	pcg	1.26
531	pcg	1.12	init ();
532			}
533
534			configuration::~configuration ()
535	pcg	1.1	{
536	pcg	1.12	cleanup ();
537	pcg	1.1	}
538	pcg	1.12
539	pcg	1.1