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 0
  // does not work, because string pointers etc. are shared
  // is not called, however
  if (rsa_key)
    RSA_free (rsa_key);

  free (nodename);
  free (hostname);
  free (if_up_data);
#if ENABLE_DNS
  free (domain);
  free (dns_hostname);
#endif
#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;
  default_node.if_up_data  = strdup ("");

#if ENABLE_DNS
  default_node.dns_port    = 0; // default is 0 == client

  dns_forw_host       = strdup ("127.0.0.1");
  dns_forw_port       = 53;
  dns_timeout_factor  = DEFAULT_DNS_TIMEOUT_FACTOR;
  dns_send_interval   = DEFAULT_DNS_SEND_INTERVAL;
  dns_overlap_factor  = DEFAULT_DNS_OVERLAP_FACTOR;
  dns_max_outstanding = DEFAULT_DNS_MAX_OUTSTANDING;
#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, "dns-timeout-factor"))
            {
#if ENABLE_DNS
              dns_timeout_factor = atof (val);
#endif
            }
          else if (!strcmp (var, "dns-send-interval"))
            {
#if ENABLE_DNS
              dns_send_interval = atoi (val);
#endif
            }
          else if (!strcmp (var, "dns-overlap-factor"))
            {
#if ENABLE_DNS
              dns_overlap_factor = atof (val);
#endif
            }
          else if (!strcmp (var, "dns-max-outstanding"))
            {
#if ENABLE_DNS
              dns_max_outstanding = 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, "if-up-data"))
            free (node->if_up_data), node->if_up_data = strdup (val);
          else if (!strcmp (var, "router-priority"))
            node->routerprio = atoi (val);
          else if (!strcmp (var, "max-retry"))
            node->max_retry = atoi (val);
          else if (!strcmp (var, "connect"))
            {
              if (!strcmp (val, "ondemand"))
                node->connectmode = conf_node::C_ONDEMAND;
              else if (!strcmp (val, "never"))
                node->connectmode = conf_node::C_NEVER;
              else if (!strcmp (val, "always"))
                node->connectmode = conf_node::C_ALWAYS;
              else if (!strcmp (val, "disabled"))
                node->connectmode = conf_node::C_DISABLED;
              else
                slog (L_WARN,
                      _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d, 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:	1.39
Committed:	Sat Mar 26 03:16:24 2005 UTC (21 years, 6 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.38:	+8 -0 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	1.39	#if 0
94			// does not work, because string pointers etc. are shared
95			// is not called, however
96	pcg	1.12	if (rsa_key)
97			RSA_free (rsa_key);
98
99			free (nodename);
100			free (hostname);
101	pcg	1.39	free (if_up_data);
102	pcg	1.30	#if ENABLE_DNS
103	pcg	1.28	free (domain);
104	pcg	1.30	free (dns_hostname);
105			#endif
106	pcg	1.39	#endif
107	pcg	1.1	}
108
109			void configuration::init ()
110			{
111			memset (this, 0, sizeof (*this));
112
113	pcg	1.19	mtu = DEFAULT_MTU;
114	pcg	1.1	rekey = DEFAULT_REKEY;
115			keepalive = DEFAULT_KEEPALIVE;
116	pcg	1.2	llevel = L_INFO;
117	pcg	1.5	ip_proto = IPPROTO_GRE;
118	pcg	1.16	#if ENABLE_ICMP
119	pcg	1.13	icmp_type = ICMP_ECHOREPLY;
120	pcg	1.16	#endif
121	pcg	1.1
122	pcg	1.5	default_node.udp_port = DEFAULT_UDPPORT;
123	pcg	1.24	default_node.tcp_port = DEFAULT_UDPPORT; // ehrm
124	pcg	1.1	default_node.connectmode = conf_node::C_ALWAYS;
125			default_node.compress = true;
126	pcg	1.29	default_node.protocols = 0;
127	pcg	1.27	default_node.max_retry = DEFAULT_MAX_RETRY;
128	pcg	1.39	default_node.if_up_data = strdup ("");
129	pcg	1.25
130	pcg	1.30	#if ENABLE_DNS
131	pcg	1.32	default_node.dns_port = 0; // default is 0 == client
132	pcg	1.38
133			dns_forw_host = strdup ("127.0.0.1");
134			dns_forw_port = 53;
135			dns_timeout_factor = DEFAULT_DNS_TIMEOUT_FACTOR;
136			dns_send_interval = DEFAULT_DNS_SEND_INTERVAL;
137			dns_overlap_factor = DEFAULT_DNS_OVERLAP_FACTOR;
138			dns_max_outstanding = DEFAULT_DNS_MAX_OUTSTANDING;
139	pcg	1.30	#endif
140
141	pcg	1.27	conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid");
142	pcg	1.1	}
143
144			void configuration::cleanup()
145			{
146			if (rsa_key)
147			RSA_free (rsa_key);
148
149	pcg	1.12	rsa_key = 0;
150	pcg	1.1
151	pcg	1.28	free (pidfilename); pidfilename = 0;
152			free (ifname); ifname = 0;
153	pcg	1.12	#if ENABLE_HTTP_PROXY
154	pcg	1.28	free (proxy_host); proxy_host = 0;
155			free (proxy_auth); proxy_auth = 0;
156			#endif
157			#if ENABLE_DNS
158			free (dns_forw_host); dns_forw_host = 0;
159	pcg	1.12	#endif
160	pcg	1.1	}
161
162			void
163			configuration::clear_config ()
164			{
165			for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i)
166			delete *i;
167
168			nodes.clear ();
169
170			cleanup ();
171			init ();
172			}
173
174	pcg	1.37	#define parse_bool(target,name,trueval,falseval) do { \
175			if (!strcmp (val, "yes")) target = trueval; \
176	pcg	1.5	else if (!strcmp (val, "no")) target = falseval; \
177			else if (!strcmp (val, "true")) target = trueval; \
178			else if (!strcmp (val, "false")) target = falseval; \
179			else if (!strcmp (val, "on")) target = trueval; \
180			else if (!strcmp (val, "off")) target = falseval; \
181			else \
182			slog (L_WARN, \
183			_("illegal value for '%s', only 'yes\|true\|on' or 'no\|false\|off' allowed, at '%s' line %d"), \
184	pcg	1.37	name, var, fname, lineno); \
185			} while (0)
186	pcg	1.5
187	pcg	1.1	void configuration::read_config (bool need_keys)
188			{
189			char *fname;
190			FILE *f;
191
192			clear_config ();
193
194	pcg	1.27	asprintf (&fname, "%s/gvpe.conf", confbase);
195	pcg	1.1	f = fopen (fname, "r");
196
197			if (f)
198			{
199			char line[16384];
200			int lineno = 0;
201			char var, val;
202			conf_node *node = &default_node;
203
204			while (fgets (line, sizeof (line), f))
205			{
206			lineno++;
207
208			{
209			char *end = line + strlen (line);
210
211			while (*end < ' ' && end >= line)
212			end--;
213
214			*++end = 0;
215			}
216
217			char *tok = line;
218
219			retry:
220			var = strtok (tok, "\t =");
221			tok = 0;
222
223			if (!var \|\| !var[0])
224			continue; /* no tokens on this line */
225
226			if (var[0] == '#')
227			continue; /* comment: ignore */
228
229			val = strtok (NULL, "\t\n\r =");
230
231			if (!val \|\| val[0] == '#')
232			{
233			slog (L_WARN,
234	pcg	1.36	_("no value for variable `%s', at '%s' line %d, skipping."),
235	pcg	1.1	var, fname, lineno);
236	pcg	1.36	continue;
237	pcg	1.1	}
238
239			if (!strcmp (var, "on"))
240			{
241			if (!::thisnode
242			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
243			\|\| !strcmp (val, ::thisnode))
244			goto retry;
245
246			continue;
247			}
248
249			// truly global
250			if (!strcmp (var, "loglevel"))
251			{
252			loglevel l = string_to_loglevel (val);
253
254			if (l != L_NONE)
255	pcg	1.2	llevel = l;
256	pcg	1.1	else
257			slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line);
258			}
259	pcg	1.5	else if (!strcmp (var, "ip-proto"))
260			ip_proto = atoi (val);
261	pcg	1.20	else if (!strcmp (var, "icmp-type"))
262			{
263	pcg	1.16	#if ENABLE_ICMP
264	pcg	1.20	icmp_type = atoi (val);
265	pcg	1.16	#endif
266	pcg	1.20	}
267	pcg	1.1
268			// per config
269			else if (!strcmp (var, "node"))
270			{
271			default_node.id++;
272
273			node = new conf_node (default_node);
274
275			nodes.push_back (node);
276
277			node->nodename = strdup (val);
278
279			{
280			char *fname;
281			FILE *f;
282
283			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
284
285			f = fopen (fname, "r");
286			if (f)
287			{
288			node->rsa_key = RSA_new ();
289
290			if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
291			{
292			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
293			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
294	pcg	1.22	exit (EXIT_FAILURE);
295	pcg	1.1	}
296
297	pcg	1.22	require (RSA_blinding_on (node->rsa_key, 0));
298	pcg	1.1
299			fclose (f);
300			}
301			else
302			{
303			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
304
305			if (need_keys)
306	pcg	1.22	exit (EXIT_FAILURE);
307	pcg	1.1	}
308
309			free (fname);
310			}
311
312	pcg	1.23	if (::thisnode && !strcmp (node->nodename, ::thisnode))
313	pcg	1.1	thisnode = node;
314			}
315			else if (!strcmp (var, "private-key"))
316	pcg	1.24	free (prikeyfile), prikeyfile = strdup (val);
317	pcg	1.1	else if (!strcmp (var, "ifpersist"))
318	pcg	1.36	parse_bool (ifpersist, "ifpersist", true, false);
319	pcg	1.1	else if (!strcmp (var, "ifname"))
320	pcg	1.24	free (ifname), ifname = strdup (val);
321	pcg	1.1	else if (!strcmp (var, "rekey"))
322			rekey = atoi (val);
323			else if (!strcmp (var, "keepalive"))
324			keepalive = atoi (val);
325			else if (!strcmp (var, "mtu"))
326			mtu = atoi (val);
327			else if (!strcmp (var, "if-up"))
328	pcg	1.24	free (script_if_up), script_if_up = strdup (val);
329	pcg	1.1	else if (!strcmp (var, "node-up"))
330	pcg	1.24	free (script_node_up), script_node_up = strdup (val);
331	pcg	1.1	else if (!strcmp (var, "node-down"))
332	pcg	1.24	free (script_node_down), script_node_down = strdup (val);
333			else if (!strcmp (var, "pid-file"))
334			free (pidfilename), pidfilename = strdup (val);
335	pcg	1.34	else if (!strcmp (var, "dns-forw-host"))
336			{
337	pcg	1.30	#if ENABLE_DNS
338	pcg	1.34	free (dns_forw_host), dns_forw_host = strdup (val);
339			#endif
340			}
341	pcg	1.29	else if (!strcmp (var, "dns-forw-port"))
342	pcg	1.34	{
343			#if ENABLE_DNS
344			dns_forw_port = atoi (val);
345	pcg	1.28	#endif
346	pcg	1.34	}
347	pcg	1.38	else if (!strcmp (var, "dns-timeout-factor"))
348			{
349			#if ENABLE_DNS
350			dns_timeout_factor = atof (val);
351			#endif
352			}
353			else if (!strcmp (var, "dns-send-interval"))
354			{
355			#if ENABLE_DNS
356			dns_send_interval = atoi (val);
357			#endif
358			}
359			else if (!strcmp (var, "dns-overlap-factor"))
360			{
361			#if ENABLE_DNS
362			dns_overlap_factor = atof (val);
363			#endif
364			}
365			else if (!strcmp (var, "dns-max-outstanding"))
366			{
367			#if ENABLE_DNS
368			dns_max_outstanding = atoi (val);
369			#endif
370			}
371	pcg	1.20	else if (!strcmp (var, "http-proxy-host"))
372			{
373	pcg	1.12	#if ENABLE_HTTP_PROXY
374	pcg	1.24	free (proxy_host), proxy_host = strdup (val);
375	pcg	1.20	#endif
376			}
377	pcg	1.12	else if (!strcmp (var, "http-proxy-port"))
378	pcg	1.20	{
379			#if ENABLE_HTTP_PROXY
380			proxy_port = atoi (val);
381			#endif
382			}
383	pcg	1.12	else if (!strcmp (var, "http-proxy-auth"))
384	pcg	1.20	{
385			#if ENABLE_HTTP_PROXY
386			proxy_auth = (char )base64_encode ((const u8 )val, strlen (val));
387	pcg	1.12	#endif
388	pcg	1.20	}
389	pcg	1.1
390			/* node-specific, non-defaultable */
391			else if (node != &default_node && !strcmp (var, "hostname"))
392	pcg	1.24	free (node->hostname), node->hostname = strdup (val);
393	pcg	1.1
394			/* node-specific, defaultable */
395	pcg	1.4	else if (!strcmp (var, "udp-port"))
396	pcg	1.5	node->udp_port = atoi (val);
397	pcg	1.8	else if (!strcmp (var, "tcp-port"))
398			node->tcp_port = atoi (val);
399	pcg	1.34	else if (!strcmp (var, "dns-hostname"))
400			{
401	pcg	1.30	#if ENABLE_DNS
402	pcg	1.34	free (node->dns_hostname), node->dns_hostname = strdup (val);
403			#endif
404			}
405	pcg	1.24	else if (!strcmp (var, "dns-port"))
406	pcg	1.34	{
407			#if ENABLE_DNS
408			node->dns_port = atoi (val);
409			#endif
410			}
411	pcg	1.28	else if (!strcmp (var, "dns-domain"))
412	pcg	1.34	{
413			#if ENABLE_DNS
414			free (node->domain), node->domain = strdup (val);
415	pcg	1.28	#endif
416	pcg	1.34	}
417	pcg	1.39	else if (!strcmp (var, "if-up-data"))
418			free (node->if_up_data), node->if_up_data = strdup (val);
419	pcg	1.1	else if (!strcmp (var, "router-priority"))
420			node->routerprio = atoi (val);
421	pcg	1.27	else if (!strcmp (var, "max-retry"))
422			node->max_retry = atoi (val);
423	pcg	1.1	else if (!strcmp (var, "connect"))
424			{
425			if (!strcmp (val, "ondemand"))
426			node->connectmode = conf_node::C_ONDEMAND;
427			else if (!strcmp (val, "never"))
428			node->connectmode = conf_node::C_NEVER;
429			else if (!strcmp (val, "always"))
430			node->connectmode = conf_node::C_ALWAYS;
431	pcg	1.4	else if (!strcmp (val, "disabled"))
432			node->connectmode = conf_node::C_DISABLED;
433	pcg	1.1	else
434			slog (L_WARN,
435	pcg	1.36	_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d, ignoring."),
436	pcg	1.27	var, fname, lineno);
437	pcg	1.1	}
438	pcg	1.3	else if (!strcmp (var, "inherit-tos"))
439	pcg	1.36	parse_bool (node->inherit_tos, "inherit-tos", true, false);
440	pcg	1.1	else if (!strcmp (var, "compress"))
441	pcg	1.36	parse_bool (node->compress, "compress", true, false);
442	pcg	1.5	// all these bool options really really cost a lot of executable size!
443	pcg	1.8	else if (!strcmp (var, "enable-tcp"))
444			{
445	pcg	1.11	#if ENABLE_TCP
446	pcg	1.8	u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) \| v;
447	pcg	1.13	#endif
448			}
449			else if (!strcmp (var, "enable-icmp"))
450			{
451			#if ENABLE_ICMP
452			u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) \| v;
453	pcg	1.11	#endif
454	pcg	1.8	}
455	pcg	1.24	else if (!strcmp (var, "enable-dns"))
456			{
457			#if ENABLE_DNS
458			u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) \| v;
459			#endif
460			}
461	pcg	1.6	else if (!strcmp (var, "enable-udp"))
462	pcg	1.5	{
463	pcg	1.6	u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
464	pcg	1.5	}
465	pcg	1.6	else if (!strcmp (var, "enable-rawip"))
466	pcg	1.28	{
467	pcg	1.6	u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
468	pcg	1.1	}
469
470			// unknown or misplaced
471			else
472	pcg	1.12	slog (L_WARN,
473	pcg	1.36	_("unknown or misplaced variable `%s', at '%s' line %d, skipping."),
474	pcg	1.12	var, fname, lineno);
475	pcg	1.1	}
476
477			fclose (f);
478			}
479			else
480			{
481			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
482	pcg	1.22	exit (EXIT_FAILURE);
483	pcg	1.1	}
484
485			free (fname);
486
487			fname = config_filename (prikeyfile, "hostkey");
488
489			f = fopen (fname, "r");
490			if (f)
491			{
492			rsa_key = RSA_new ();
493
494			if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL))
495			{
496			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
497			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
498	pcg	1.22	exit (EXIT_FAILURE);
499	pcg	1.1	}
500
501	pcg	1.22	require (RSA_blinding_on (rsa_key, 0));
502	pcg	1.1
503			fclose (f);
504			}
505			else
506			{
507			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
508
509			if (need_keys)
510	pcg	1.22	exit (EXIT_FAILURE);
511	pcg	1.1	}
512	pcg	1.22
513	pcg	1.23	if (need_keys && ::thisnode
514			&& rsa_key && thisnode && thisnode->rsa_key)
515	pcg	1.22	if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0
516			\|\| BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0)
517			{
518			slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
519			exit (EXIT_FAILURE);
520			}
521	pcg	1.1
522			free (fname);
523			}
524
525			char configuration::config_filename (const char name, const char *dflt)
526			{
527			char *fname;
528
529			asprintf (&fname, name ? name : dflt, ::thisnode);
530
531			if (!ABSOLUTE_PATH (fname))
532			{
533			char *rname = fname;
534			asprintf (&fname, "%s/%s", confbase, rname);
535			free (rname);
536			}
537
538			return fname;
539			}
540
541			void
542			configuration::print ()
543			{
544			printf (_("\nConfiguration\n\n"));
545			printf (_("# of nodes: %d\n"), nodes.size ());
546			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
547			printf (_("MTU: %d\n"), mtu);
548			printf (_("rekeying interval: %d\n"), rekey);
549			printf (_("keepalive interval: %d\n"), keepalive);
550			printf (_("interface: %s\n"), ifname);
551			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
552	pcg	1.15	printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
553	pcg	1.1	printf ("\n");
554
555			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
556			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
557
558			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
559			(*i)->print ();
560
561			printf ("\n");
562			}
563
564	pcg	1.12	configuration::configuration ()
565			{
566	pcg	1.27	asprintf (&confbase, "%s/gvpe", CONFDIR);
567	pcg	1.26
568	pcg	1.12	init ();
569			}
570
571			configuration::~configuration ()
572	pcg	1.1	{
573	pcg	1.12	cleanup ();
574	pcg	1.1	}
575	pcg	1.12
576	pcg	1.1