+++ /dev/null
-/*
- 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;
-}
projects / tinc / blobdiff