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 ()
{
  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                                                          \
    return _("illegal boolean value, only 'yes|true|on' or 'no|false|off' allowed. (ignored)"); \
} while (0)

const char *
configuration_parser::parse_line (char *line)
{
  {
    char *end = line + strlen (line);

    while (*end < ' ' && end >= line)
      end--;

    *++end = 0;
  }

  char *tok = line;
  const char *var = strtok (tok, "\t =");
  tok = 0;

  if (!var || !var[0])
    return 0;           /* no tokens on this line */

  if (var[0] == '#')
    return 0;           /* comment: ignore */

  char *val = strtok (NULL, "\t\n\r =");

  if (!val || val[0] == '#')
    return _("no value given for variable. (ignored)");

  if (!strcmp (var, "on"))
    {
      if (!::thisnode
          || (val[0] == '!' && strcmp (val + 1, ::thisnode))
          || !strcmp (val, ::thisnode))
        return parse_line (strtok (NULL, "\n\r"));
      else
        return 0;
    }

  // truly global
  if (!strcmp (var, "loglevel"))
    {
      loglevel l = string_to_loglevel (val);

      if (l == L_NONE)
        return _("unknown loglevel. (skipping)");
    }
  else if (!strcmp (var, "ip-proto"))
    conf.ip_proto = atoi (val);
  else if (!strcmp (var, "icmp-type"))
    {
#if ENABLE_ICMP
      conf.icmp_type = atoi (val);
#endif
    }

  // per config
  else if (!strcmp (var, "node"))
    {
      parse_argv ();

      conf.default_node.id++;
      node = new conf_node (conf.default_node);
      conf.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))
        conf.thisnode = node;
    }
  else if (!strcmp (var, "private-key"))
    free (conf.prikeyfile), conf.prikeyfile = strdup (val);
  else if (!strcmp (var, "ifpersist"))
    parse_bool (conf.ifpersist, "ifpersist", true, false);
  else if (!strcmp (var, "ifname"))
    free (conf.ifname), conf.ifname = strdup (val);
  else if (!strcmp (var, "rekey"))
    conf.rekey = atoi (val);
  else if (!strcmp (var, "keepalive"))
    conf.keepalive = atoi (val);
  else if (!strcmp (var, "mtu"))
    conf.mtu = atoi (val);
  else if (!strcmp (var, "if-up"))
    free (conf.script_if_up), conf.script_if_up = strdup (val);
  else if (!strcmp (var, "node-up"))
    free (conf.script_node_up), conf.script_node_up = strdup (val);
  else if (!strcmp (var, "node-down"))
    free (conf.script_node_down), conf.script_node_down = strdup (val);
  else if (!strcmp (var, "pid-file"))
    free (conf.pidfilename), conf.pidfilename = strdup (val);
  else if (!strcmp (var, "dns-forw-host"))
    {
#if ENABLE_DNS
      free (conf.dns_forw_host), conf.dns_forw_host = strdup (val);
#endif
    }
  else if (!strcmp (var, "dns-forw-port"))
    {
#if ENABLE_DNS
      conf.dns_forw_port = atoi (val);
#endif
    }
  else if (!strcmp (var, "dns-timeout-factor"))
    {
#if ENABLE_DNS
      conf.dns_timeout_factor = atof (val);
#endif
    }
  else if (!strcmp (var, "dns-send-interval"))
    {
#if ENABLE_DNS
      conf.dns_send_interval = atoi (val);
#endif
    }
  else if (!strcmp (var, "dns-overlap-factor"))
    {
#if ENABLE_DNS
      conf.dns_overlap_factor = atof (val);
#endif
    }
  else if (!strcmp (var, "dns-max-outstanding"))
    {
#if ENABLE_DNS
      conf.dns_max_outstanding = atoi (val);
#endif
    }
  else if (!strcmp (var, "http-proxy-host"))
    {
#if ENABLE_HTTP_PROXY
      free (conf.proxy_host), conf.proxy_host = strdup (val);
#endif
    }
  else if (!strcmp (var, "http-proxy-port"))
    {
#if ENABLE_HTTP_PROXY
      conf.proxy_port = atoi (val);
#endif
    }
  else if (!strcmp (var, "http-proxy-auth"))
    {
#if ENABLE_HTTP_PROXY
      conf.proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val));
#endif
    }

  /* node-specific, non-defaultable */
  else if (node != &conf.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
        return _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled'. (ignored)");
    }
  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
    return _("unknown configuration directive. (ignored)");

  return 0;
}

void configuration_parser::parse_argv ()
{
  for (int i = 0; i < argc; ++i)
    {
      char *v = argv [i];

      if (!*v)
        continue;

      char *enode = v;

      while (*enode != '.' && *enode > ' ' && *enode != '=' && *enode)
        enode++;

      if (*enode != '.')
        enode = 0;

      char *wnode = node == &conf.default_node
                    ? 0
                    : node->nodename;

      if ((!wnode && !enode)
          || (wnode && enode && !strncmp (wnode, v, enode - v)))
        {
          const char *warn = parse_line (enode ? enode + 1 : v);

          if (warn)
            slog (L_WARN, _("%s, while parsing command line option '%s'."), warn, v);

          *v = 0;
        }
    }
}

configuration_parser::configuration_parser (configuration &conf,
                                            bool need_keys,
                                            int argc,
                                            char **argv)
: conf (conf),need_keys (need_keys), argc (argc), argv (argv)
{
  char *fname;
  FILE *f;

  conf.clear ();

  asprintf (&fname, "%s/gvpe.conf", confbase);
  f = fopen (fname, "r");

  if (f)
    {
      char line[16384];
      int lineno = 0;
      node = &conf.default_node;

      while (fgets (line, sizeof (line), f))
        {
          lineno++;

          const char *warn = parse_line (line);

          if (warn)
            slog (L_WARN, _("%s, at '%s', line %d."), warn, fname, lineno);
        }

      fclose (f);

      parse_argv ();
    }
  else
    {
      slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
      exit (EXIT_FAILURE);
    }

  free (fname);

  fname = conf.config_filename (conf.prikeyfile, "hostkey");

  f = fopen (fname, "r");
  if (f)
    {
      conf.rsa_key = RSA_new ();

      if (!PEM_read_RSAPrivateKey (f, &conf.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 (conf.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
      && conf.rsa_key && conf.thisnode && conf.thisnode->rsa_key)
    if (BN_cmp (conf.rsa_key->n, conf.thisnode->rsa_key->n) != 0
        || BN_cmp (conf.rsa_key->e, conf.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:	1.40
Committed:	Mon Mar 28 20:39:18 2005 UTC (19 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-1_9
Changes since 1.39:	+280 -246 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	pcg	1.40	configuration::clear ()
164	pcg	1.1	{
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	pcg	1.40	return _("illegal boolean value, only 'yes\|true\|on' or 'no\|false\|off' allowed. (ignored)"); \
183	pcg	1.37	} while (0)
184	pcg	1.5
185	pcg	1.40	const char *
186			configuration_parser::parse_line (char *line)
187	pcg	1.1	{
188	pcg	1.40	{
189			char *end = line + strlen (line);
190
191			while (*end < ' ' && end >= line)
192			end--;
193	pcg	1.1
194	pcg	1.40	*++end = 0;
195			}
196	pcg	1.1
197	pcg	1.40	char *tok = line;
198			const char *var = strtok (tok, "\t =");
199			tok = 0;
200	pcg	1.1
201	pcg	1.40	if (!var \|\| !var[0])
202			return 0; /* no tokens on this line */
203	pcg	1.1
204	pcg	1.40	if (var[0] == '#')
205			return 0; /* comment: ignore */
206	pcg	1.1
207	pcg	1.40	char *val = strtok (NULL, "\t\n\r =");
208	pcg	1.1
209	pcg	1.40	if (!val \|\| val[0] == '#')
210			return _("no value given for variable. (ignored)");
211	pcg	1.1
212	pcg	1.40	if (!strcmp (var, "on"))
213			{
214			if (!::thisnode
215			\|\| (val[0] == '!' && strcmp (val + 1, ::thisnode))
216			\|\| !strcmp (val, ::thisnode))
217			return parse_line (strtok (NULL, "\n\r"));
218			else
219			return 0;
220			}
221	pcg	1.1
222	pcg	1.40	// truly global
223			if (!strcmp (var, "loglevel"))
224			{
225			loglevel l = string_to_loglevel (val);
226	pcg	1.1
227	pcg	1.40	if (l == L_NONE)
228			return _("unknown loglevel. (skipping)");
229			}
230			else if (!strcmp (var, "ip-proto"))
231			conf.ip_proto = atoi (val);
232			else if (!strcmp (var, "icmp-type"))
233			{
234	pcg	1.16	#if ENABLE_ICMP
235	pcg	1.40	conf.icmp_type = atoi (val);
236	pcg	1.16	#endif
237	pcg	1.40	}
238	pcg	1.1
239	pcg	1.40	// per config
240			else if (!strcmp (var, "node"))
241			{
242			parse_argv ();
243	pcg	1.1
244	pcg	1.40	conf.default_node.id++;
245			node = new conf_node (conf.default_node);
246			conf.nodes.push_back (node);
247			node->nodename = strdup (val);
248	pcg	1.1
249	pcg	1.40	{
250			char *fname;
251			FILE *f;
252
253			asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename);
254	pcg	1.1
255	pcg	1.40	f = fopen (fname, "r");
256			if (f)
257			{
258			node->rsa_key = RSA_new ();
259	pcg	1.1
260	pcg	1.40	if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL))
261	pcg	1.1	{
262	pcg	1.40	ERR_load_RSA_strings (); ERR_load_PEM_strings ();
263			slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
264			exit (EXIT_FAILURE);
265			}
266
267			require (RSA_blinding_on (node->rsa_key, 0));
268	pcg	1.1
269	pcg	1.40	fclose (f);
270			}
271			else
272			{
273			slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno));
274	pcg	1.1
275	pcg	1.40	if (need_keys)
276			exit (EXIT_FAILURE);
277			}
278	pcg	1.1
279	pcg	1.40	free (fname);
280			}
281	pcg	1.1
282	pcg	1.40	if (::thisnode && !strcmp (node->nodename, ::thisnode))
283			conf.thisnode = node;
284			}
285			else if (!strcmp (var, "private-key"))
286			free (conf.prikeyfile), conf.prikeyfile = strdup (val);
287			else if (!strcmp (var, "ifpersist"))
288			parse_bool (conf.ifpersist, "ifpersist", true, false);
289			else if (!strcmp (var, "ifname"))
290			free (conf.ifname), conf.ifname = strdup (val);
291			else if (!strcmp (var, "rekey"))
292			conf.rekey = atoi (val);
293			else if (!strcmp (var, "keepalive"))
294			conf.keepalive = atoi (val);
295			else if (!strcmp (var, "mtu"))
296			conf.mtu = atoi (val);
297			else if (!strcmp (var, "if-up"))
298			free (conf.script_if_up), conf.script_if_up = strdup (val);
299			else if (!strcmp (var, "node-up"))
300			free (conf.script_node_up), conf.script_node_up = strdup (val);
301			else if (!strcmp (var, "node-down"))
302			free (conf.script_node_down), conf.script_node_down = strdup (val);
303			else if (!strcmp (var, "pid-file"))
304			free (conf.pidfilename), conf.pidfilename = strdup (val);
305			else if (!strcmp (var, "dns-forw-host"))
306			{
307	pcg	1.30	#if ENABLE_DNS
308	pcg	1.40	free (conf.dns_forw_host), conf.dns_forw_host = strdup (val);
309	pcg	1.34	#endif
310	pcg	1.40	}
311			else if (!strcmp (var, "dns-forw-port"))
312			{
313	pcg	1.34	#if ENABLE_DNS
314	pcg	1.40	conf.dns_forw_port = atoi (val);
315	pcg	1.28	#endif
316	pcg	1.40	}
317			else if (!strcmp (var, "dns-timeout-factor"))
318			{
319	pcg	1.38	#if ENABLE_DNS
320	pcg	1.40	conf.dns_timeout_factor = atof (val);
321	pcg	1.38	#endif
322	pcg	1.40	}
323			else if (!strcmp (var, "dns-send-interval"))
324			{
325	pcg	1.38	#if ENABLE_DNS
326	pcg	1.40	conf.dns_send_interval = atoi (val);
327	pcg	1.38	#endif
328	pcg	1.40	}
329			else if (!strcmp (var, "dns-overlap-factor"))
330			{
331	pcg	1.38	#if ENABLE_DNS
332	pcg	1.40	conf.dns_overlap_factor = atof (val);
333	pcg	1.38	#endif
334	pcg	1.40	}
335			else if (!strcmp (var, "dns-max-outstanding"))
336			{
337	pcg	1.38	#if ENABLE_DNS
338	pcg	1.40	conf.dns_max_outstanding = atoi (val);
339	pcg	1.38	#endif
340	pcg	1.40	}
341			else if (!strcmp (var, "http-proxy-host"))
342			{
343	pcg	1.12	#if ENABLE_HTTP_PROXY
344	pcg	1.40	free (conf.proxy_host), conf.proxy_host = strdup (val);
345	pcg	1.20	#endif
346	pcg	1.40	}
347			else if (!strcmp (var, "http-proxy-port"))
348			{
349	pcg	1.20	#if ENABLE_HTTP_PROXY
350	pcg	1.40	conf.proxy_port = atoi (val);
351	pcg	1.20	#endif
352	pcg	1.40	}
353			else if (!strcmp (var, "http-proxy-auth"))
354			{
355	pcg	1.20	#if ENABLE_HTTP_PROXY
356	pcg	1.40	conf.proxy_auth = (char )base64_encode ((const u8 )val, strlen (val));
357	pcg	1.12	#endif
358	pcg	1.40	}
359	pcg	1.1
360	pcg	1.40	/* node-specific, non-defaultable */
361			else if (node != &conf.default_node && !strcmp (var, "hostname"))
362			free (node->hostname), node->hostname = strdup (val);
363
364			/* node-specific, defaultable */
365			else if (!strcmp (var, "udp-port"))
366			node->udp_port = atoi (val);
367			else if (!strcmp (var, "tcp-port"))
368			node->tcp_port = atoi (val);
369			else if (!strcmp (var, "dns-hostname"))
370			{
371	pcg	1.30	#if ENABLE_DNS
372	pcg	1.40	free (node->dns_hostname), node->dns_hostname = strdup (val);
373	pcg	1.34	#endif
374	pcg	1.40	}
375			else if (!strcmp (var, "dns-port"))
376			{
377	pcg	1.34	#if ENABLE_DNS
378	pcg	1.40	node->dns_port = atoi (val);
379	pcg	1.34	#endif
380	pcg	1.40	}
381			else if (!strcmp (var, "dns-domain"))
382			{
383	pcg	1.34	#if ENABLE_DNS
384	pcg	1.40	free (node->domain), node->domain = strdup (val);
385	pcg	1.28	#endif
386	pcg	1.40	}
387			else if (!strcmp (var, "if-up-data"))
388			free (node->if_up_data), node->if_up_data = strdup (val);
389			else if (!strcmp (var, "router-priority"))
390			node->routerprio = atoi (val);
391			else if (!strcmp (var, "max-retry"))
392			node->max_retry = atoi (val);
393			else if (!strcmp (var, "connect"))
394			{
395			if (!strcmp (val, "ondemand"))
396			node->connectmode = conf_node::C_ONDEMAND;
397			else if (!strcmp (val, "never"))
398			node->connectmode = conf_node::C_NEVER;
399			else if (!strcmp (val, "always"))
400			node->connectmode = conf_node::C_ALWAYS;
401			else if (!strcmp (val, "disabled"))
402			node->connectmode = conf_node::C_DISABLED;
403			else
404			return _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled'. (ignored)");
405			}
406			else if (!strcmp (var, "inherit-tos"))
407			parse_bool (node->inherit_tos, "inherit-tos", true, false);
408			else if (!strcmp (var, "compress"))
409			parse_bool (node->compress, "compress", true, false);
410			// all these bool options really really cost a lot of executable size!
411			else if (!strcmp (var, "enable-tcp"))
412			{
413	pcg	1.11	#if ENABLE_TCP
414	pcg	1.40	u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) \| v;
415	pcg	1.13	#endif
416	pcg	1.40	}
417			else if (!strcmp (var, "enable-icmp"))
418			{
419	pcg	1.13	#if ENABLE_ICMP
420	pcg	1.40	u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) \| v;
421	pcg	1.11	#endif
422	pcg	1.40	}
423			else if (!strcmp (var, "enable-dns"))
424			{
425	pcg	1.24	#if ENABLE_DNS
426	pcg	1.40	u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) \| v;
427	pcg	1.24	#endif
428	pcg	1.40	}
429			else if (!strcmp (var, "enable-udp"))
430			{
431			u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) \| v;
432			}
433			else if (!strcmp (var, "enable-rawip"))
434			{
435			u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) \| v;
436			}
437
438			// unknown or misplaced
439			else
440			return _("unknown configuration directive. (ignored)");
441
442			return 0;
443			}
444
445			void configuration_parser::parse_argv ()
446			{
447			for (int i = 0; i < argc; ++i)
448			{
449			char *v = argv [i];
450
451			if (!*v)
452			continue;
453
454			char *enode = v;
455
456			while (enode != '.' && enode > ' ' && enode != '=' && enode)
457			enode++;
458
459			if (*enode != '.')
460			enode = 0;
461
462			char *wnode = node == &conf.default_node
463			? 0
464			: node->nodename;
465
466			if ((!wnode && !enode)
467			\|\| (wnode && enode && !strncmp (wnode, v, enode - v)))
468			{
469			const char *warn = parse_line (enode ? enode + 1 : v);
470
471			if (warn)
472			slog (L_WARN, _("%s, while parsing command line option '%s'."), warn, v);
473
474			*v = 0;
475			}
476			}
477			}
478
479			configuration_parser::configuration_parser (configuration &conf,
480			bool need_keys,
481			int argc,
482			char **argv)
483			: conf (conf),need_keys (need_keys), argc (argc), argv (argv)
484			{
485			char *fname;
486			FILE *f;
487
488			conf.clear ();
489
490			asprintf (&fname, "%s/gvpe.conf", confbase);
491			f = fopen (fname, "r");
492
493			if (f)
494			{
495			char line[16384];
496			int lineno = 0;
497			node = &conf.default_node;
498
499			while (fgets (line, sizeof (line), f))
500			{
501			lineno++;
502
503			const char *warn = parse_line (line);
504
505			if (warn)
506			slog (L_WARN, _("%s, at '%s', line %d."), warn, fname, lineno);
507	pcg	1.1	}
508
509			fclose (f);
510	pcg	1.40
511			parse_argv ();
512	pcg	1.1	}
513			else
514			{
515			slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno));
516	pcg	1.22	exit (EXIT_FAILURE);
517	pcg	1.1	}
518
519			free (fname);
520
521	pcg	1.40	fname = conf.config_filename (conf.prikeyfile, "hostkey");
522	pcg	1.1
523			f = fopen (fname, "r");
524			if (f)
525			{
526	pcg	1.40	conf.rsa_key = RSA_new ();
527	pcg	1.1
528	pcg	1.40	if (!PEM_read_RSAPrivateKey (f, &conf.rsa_key, NULL, NULL))
529	pcg	1.1	{
530			ERR_load_RSA_strings (); ERR_load_PEM_strings ();
531			slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0));
532	pcg	1.22	exit (EXIT_FAILURE);
533	pcg	1.1	}
534
535	pcg	1.40	require (RSA_blinding_on (conf.rsa_key, 0));
536	pcg	1.1
537			fclose (f);
538			}
539			else
540			{
541			slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno));
542
543			if (need_keys)
544	pcg	1.22	exit (EXIT_FAILURE);
545	pcg	1.1	}
546	pcg	1.22
547	pcg	1.23	if (need_keys && ::thisnode
548	pcg	1.40	&& conf.rsa_key && conf.thisnode && conf.thisnode->rsa_key)
549			if (BN_cmp (conf.rsa_key->n, conf.thisnode->rsa_key->n) != 0
550			\|\| BN_cmp (conf.rsa_key->e, conf.thisnode->rsa_key->e) != 0)
551	pcg	1.22	{
552			slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode);
553			exit (EXIT_FAILURE);
554			}
555	pcg	1.1
556			free (fname);
557			}
558
559			char configuration::config_filename (const char name, const char *dflt)
560			{
561			char *fname;
562
563			asprintf (&fname, name ? name : dflt, ::thisnode);
564
565			if (!ABSOLUTE_PATH (fname))
566			{
567			char *rname = fname;
568			asprintf (&fname, "%s/%s", confbase, rname);
569			free (rname);
570			}
571
572			return fname;
573			}
574
575			void
576			configuration::print ()
577			{
578			printf (_("\nConfiguration\n\n"));
579			printf (_("# of nodes: %d\n"), nodes.size ());
580			printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>");
581			printf (_("MTU: %d\n"), mtu);
582			printf (_("rekeying interval: %d\n"), rekey);
583			printf (_("keepalive interval: %d\n"), keepalive);
584			printf (_("interface: %s\n"), ifname);
585			printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>");
586	pcg	1.15	printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1);
587	pcg	1.1	printf ("\n");
588
589			printf ("%4s %-17s %s %-8.8s %-10.10s %s\n",
590			_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port"));
591
592			for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i)
593			(*i)->print ();
594
595			printf ("\n");
596			}
597
598	pcg	1.12	configuration::configuration ()
599			{
600	pcg	1.27	asprintf (&confbase, "%s/gvpe", CONFDIR);
601	pcg	1.26
602	pcg	1.12	init ();
603			}
604
605			configuration::~configuration ()
606	pcg	1.1	{
607	pcg	1.12	cleanup ();
608	pcg	1.1	}
609	pcg	1.12
610	pcg	1.1