X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fpokey%2Fnet_setup.c;fp=src%2Fpokey%2Fnet_setup.c;h=c44d2a95654188f850ada71d6193cd462c8a308b;hb=04d33be4bd102de67bb6dba5c449e12fea0db4d2;hp=0000000000000000000000000000000000000000;hpb=b0a676988a8da3120e64ef0e1a4ea4c28b1511e1;p=tinc

diff --git a/src/pokey/net_setup.c b/src/pokey/net_setup.c
new file mode 100644
index 00000000..c44d2a95
--- /dev/null
+++ b/src/pokey/net_setup.c
@@ -0,0 +1,546 @@
+/*
+    net_setup.c -- Setup.
+    Copyright (C) 1998-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
+                  2000-2002 Guus Sliepen <guus@sliepen.warande.net>
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: net_setup.c,v 1.1 2002/04/28 12:46:26 zarq Exp $
+*/
+
+#include "config.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#ifdef HAVE_LINUX
+ #include <netinet/ip.h>
+ #include <netinet/tcp.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+/* SunOS really wants sys/socket.h BEFORE net/if.h,
+   and FreeBSD wants these lines below the rest. */
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <net/if.h>
+
+#include <openssl/pem.h>
+#include <openssl/rsa.h>
+#include <openssl/rand.h>
+
+#include <utils.h>
+#include <xalloc.h>
+#include <avl_tree.h>
+#include <list.h>
+
+#include "conf.h"
+#include "interface.h"
+#include "connection.h"
+#include "meta.h"
+#include "net.h"
+#include "netutl.h"
+#include "process.h"
+#include "protocol.h"
+#include "subnet.h"
+#include "graph.h"
+#include "process.h"
+#include "route.h"
+#include "device.h"
+#include "event.h"
+#include "logging.h"
+
+#include "system.h"
+
+char *myport;
+
+int read_rsa_public_key(connection_t *c)
+{
+  FILE *fp;
+  char *fname;
+  char *key;
+cp
+  if(!c->rsa_key)
+    c->rsa_key = RSA_new();
+
+  /* First, check for simple PublicKey statement */
+
+  if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key))
+    {
+      BN_hex2bn(&c->rsa_key->n, key);
+      BN_hex2bn(&c->rsa_key->e, "FFFF");
+      free(key);
+      return 0;
+    }
+
+  /* Else, check for PublicKeyFile statement and read it */
+
+  if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
+    {
+      if(is_safe_path(fname))
+        {
+          if((fp = fopen(fname, "r")) == NULL)
+            {
+              log(0, TLOG_ERROR,
+		  _("Error reading RSA public key file `%s': %s"),
+		  fname, strerror(errno));
+              free(fname);
+              return -1;
+            }
+          free(fname);
+          c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
+          fclose(fp);
+          if(!c->rsa_key)
+            {
+              syslog(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
+                     fname, strerror(errno));
+              return -1;
+            }
+          return 0;
+        }
+      else
+        {
+          free(fname);
+          return -1;
+        }
+    }
+
+  /* Else, check if a harnessed public key is in the config file */
+
+  asprintf(&fname, "%s/hosts/%s", confbase, c->name);
+  if((fp = fopen(fname, "r")))
+    {
+      c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
+      fclose(fp);
+    }
+
+  free(fname);
+
+  if(c->rsa_key)
+    return 0;
+  else
+    {
+      syslog(LOG_ERR, _("No public key for %s specified!"), c->name);
+      return -1;
+    }
+}
+
+int read_rsa_private_key(void)
+{
+  FILE *fp;
+  char *fname, *key;
+cp
+  if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key))
+    {
+      myself->connection->rsa_key = RSA_new();
+      BN_hex2bn(&myself->connection->rsa_key->d, key);
+      BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
+      free(key);
+      return 0;
+    }
+
+  if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
+    asprintf(&fname, "%s/rsa_key.priv", confbase);
+
+  if(is_safe_path(fname))
+    {
+      if((fp = fopen(fname, "r")) == NULL)
+        {
+          syslog(LOG_ERR, _("Error reading RSA private key file `%s': %s"),
+                 fname, strerror(errno));
+          free(fname);
+          return -1;
+        }
+      free(fname);
+      myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
+      fclose(fp);
+      if(!myself->connection->rsa_key)
+        {
+          syslog(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
+                 fname, strerror(errno));
+          return -1;
+        }
+      return 0;
+    }
+
+  free(fname);
+  return -1;
+}
+
+int check_rsa_key(RSA *rsa_key)
+{
+  char *test1, *test2, *test3;
+cp
+  if(rsa_key->p && rsa_key->q)
+    {
+      if(RSA_check_key(rsa_key) != 1)
+          return -1;
+    }
+  else
+    {
+      test1 = xmalloc(RSA_size(rsa_key));
+      test2 = xmalloc(RSA_size(rsa_key));
+      test3 = xmalloc(RSA_size(rsa_key));
+
+      if(RSA_public_encrypt(RSA_size(rsa_key), test1, test2, rsa_key, RSA_NO_PADDING) != RSA_size(rsa_key))
+          return -1;
+
+      if(RSA_private_decrypt(RSA_size(rsa_key), test2, test3, rsa_key, RSA_NO_PADDING) != RSA_size(rsa_key))
+          return -1;
+
+      if(memcmp(test1, test3, RSA_size(rsa_key)))
+          return -1;
+    }
+cp
+  return 0;
+}
+
+/*
+  Configure node_t myself and set up the local sockets (listen only)
+*/
+int setup_myself(void)
+{
+  config_t *cfg;
+  subnet_t *subnet;
+  char *name, *mode, *afname, *cipher, *digest;
+  int choice;
+cp
+  myself = new_node();
+  myself->connection = new_connection();
+  init_configuration(&myself->connection->config_tree);
+
+  asprintf(&myself->hostname, _("MYSELF"));
+  asprintf(&myself->connection->hostname, _("MYSELF"));
+
+  myself->connection->options = 0;
+  myself->connection->protocol_version = PROT_CURRENT;
+
+  if(!get_config_string(lookup_config(config_tree, "Name"), &name)) /* Not acceptable */
+    {
+      syslog(LOG_ERR, _("Name for tinc daemon required!"));
+      return -1;
+    }
+
+  if(check_id(name))
+    {
+      syslog(LOG_ERR, _("Invalid name for myself!"));
+      free(name);
+      return -1;
+    }
+
+  myself->name = name;
+  myself->connection->name = xstrdup(name);
+
+cp
+  if(read_rsa_private_key())
+    return -1;
+
+  if(read_connection_config(myself->connection))
+    {
+      syslog(LOG_ERR, _("Cannot open host configuration file for myself!"));
+      return -1;
+    }
+
+  if(read_rsa_public_key(myself->connection))
+    return -1;
+cp
+
+  if(check_rsa_key(myself->connection->rsa_key))
+    {
+      syslog(LOG_ERR, _("Invalid public/private keypair!"));
+      return -1;
+    }
+
+  if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
+    asprintf(&myport, "655");
+
+/* Read in all the subnets specified in the host configuration file */
+
+  cfg = lookup_config(myself->connection->config_tree, "Subnet");
+
+  while(cfg)
+    {
+      if(!get_config_subnet(cfg, &subnet))
+        return -1;
+
+      subnet_add(myself, subnet);
+
+      cfg = lookup_config_next(myself->connection->config_tree, cfg);
+    }
+
+cp
+  /* Check some options */
+
+  if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice))
+    if(choice)
+      myself->options |= OPTION_INDIRECT;
+
+  if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice))
+    if(choice)
+      myself->options |= OPTION_TCPONLY;
+
+  if(get_config_bool(lookup_config(myself->connection->config_tree, "IndirectData"), &choice))
+    if(choice)
+      myself->options |= OPTION_INDIRECT;
+
+  if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice))
+    if(choice)
+      myself->options |= OPTION_TCPONLY;
+
+  if(myself->options & OPTION_TCPONLY)
+    myself->options |= OPTION_INDIRECT;
+
+  if(get_config_string(lookup_config(config_tree, "Mode"), &mode))
+    {
+      if(!strcasecmp(mode, "router"))
+        routing_mode = RMODE_ROUTER;
+      else if (!strcasecmp(mode, "switch"))
+        routing_mode = RMODE_SWITCH;
+      else if (!strcasecmp(mode, "hub"))
+        routing_mode = RMODE_HUB;
+      else
+        {
+          syslog(LOG_ERR, _("Invalid routing mode!"));
+          return -1;
+        }
+      free(mode);
+    }
+  else
+    routing_mode = RMODE_ROUTER;
+
+  get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
+#if !defined(SOL_IP) || !defined(IP_TOS)
+  if(priorityinheritance)
+    syslog(LOG_WARNING, _("PriorityInheritance not supported on this platform"));
+#endif
+
+  if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
+    macexpire= 600;
+
+  if(get_config_int(lookup_config(myself->connection->config_tree, "MaxTimeout"), &maxtimeout))
+    {
+      if(maxtimeout <= 0)
+        {
+          syslog(LOG_ERR, _("Bogus maximum timeout!"));
+          return -1;
+        }
+    }
+  else
+    maxtimeout = 900;
+
+  if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname))
+    {
+      if(!strcasecmp(afname, "IPv4"))
+        addressfamily = AF_INET;
+      else if (!strcasecmp(afname, "IPv6"))
+        addressfamily = AF_INET6;
+      else if (!strcasecmp(afname, "any"))
+        addressfamily = AF_UNSPEC;
+      else
+        {
+          syslog(LOG_ERR, _("Invalid address family!"));
+          return -1;
+        }
+      free(afname);
+    }
+  else
+    addressfamily = AF_INET;
+
+  get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
+cp
+  /* Generate packet encryption key */
+
+  if(get_config_string(lookup_config(myself->connection->config_tree, "Cipher"), &cipher))
+    {
+      if(!strcasecmp(cipher, "none"))
+        {
+          myself->cipher = NULL;
+        }
+      else
+        {
+          if(!(myself->cipher = EVP_get_cipherbyname(cipher)))
+            {
+              syslog(LOG_ERR, _("Unrecognized cipher type!"));
+              return -1;
+            }
+        }
+    }
+  else
+    myself->cipher = EVP_bf_cbc();
+
+  if(myself->cipher)
+    myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
+  else
+    myself->keylength = 1;
+
+  myself->connection->outcipher = EVP_bf_ofb();
+
+  myself->key = (char *)xmalloc(myself->keylength);
+  RAND_pseudo_bytes(myself->key, myself->keylength);
+
+  if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
+    keylifetime = 3600;
+
+  keyexpires = now + keylifetime;
+
+  /* Check if we want to use message authentication codes... */
+
+  if(get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest))
+    {
+      if(!strcasecmp(digest, "none"))
+        {
+          myself->digest = NULL;
+        }
+      else
+        {
+          if(!(myself->digest = EVP_get_digestbyname(digest)))
+            {
+              syslog(LOG_ERR, _("Unrecognized digest type!"));
+              return -1;
+            }
+        }
+    }
+  else
+    myself->digest = EVP_sha1();
+
+  myself->connection->outdigest = EVP_sha1();
+
+  if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->maclength))
+    {
+      if(myself->digest)
+        {
+          if(myself->maclength > myself->digest->md_size)
+            {
+              syslog(LOG_ERR, _("MAC length exceeds size of digest!"));
+              return -1;
+            }
+          else if (myself->maclength < 0)
+            {
+              syslog(LOG_ERR, _("Bogus MAC length!"));
+              return -1;
+            }
+        }
+    }
+  else
+    myself->maclength = 4;
+
+  myself->connection->outmaclength = 0;
+
+  /* Compression */
+
+  if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"), &myself->compression))
+    {
+      if(myself->compression < 0 || myself->compression > 9)
+        {
+          syslog(LOG_ERR, _("Bogus compression level!"));
+          return -1;
+        }
+    }
+  else
+    myself->compression = 0;
+
+  myself->connection->outcompression = 0;
+cp
+  /* Done */
+
+  myself->nexthop = myself;
+  myself->via = myself;
+  myself->status.active = 1;
+  node_add(myself);
+
+  graph();
+
+  syslog(LOG_NOTICE, _("Ready"));
+cp
+  return 0;
+}
+
+/*
+  setup all initial network connections
+*/
+int setup_network_connections(void)
+{
+cp
+  now = time(NULL);
+
+  init_connections();
+  init_subnets();
+  init_nodes();
+  init_edges();
+  init_events();
+  init_requests();
+
+  if(get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
+    {
+      if(pingtimeout < 1)
+        {
+          pingtimeout = 86400;
+        }
+    }
+  else
+    pingtimeout = 60;
+
+  if(setup_myself() < 0)
+    return -1;
+
+  try_outgoing_connections();
+cp
+  return 0;
+}
+
+/*
+  close all open network connections
+*/
+void close_network_connections(void)
+{
+  avl_node_t *node, *next;
+  connection_t *c;
+  int i;
+cp
+  for(node = connection_tree->head; node; node = next)
+    {
+      next = node->next;
+      c = (connection_t *)node->data;
+      if(c->outgoing)
+        free(c->outgoing->name), free(c->outgoing), c->outgoing = NULL;
+      terminate_connection(c, 0);
+    }
+
+  if(myself && myself->connection)
+    terminate_connection(myself->connection, 0);
+
+  for(i = 0; i < listen_sockets; i++)
+    {
+      close(listen_socket[i].tcp);
+      close(listen_socket[i].udp);
+    }
+
+  exit_requests();
+  exit_events();
+  exit_edges();
+  exit_subnets();
+  exit_nodes();
+  exit_connections();
+
+cp
+  return;
+}