forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
Get rid of "!= 0" check - other tests for a bit being on in g_resolv_flags don't do that. svn path=/trunk/; revision=8684
1890 lines
42 KiB
C
1890 lines
42 KiB
C
/* resolv.c
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* Routines for network object lookup
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*
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* $Id: resolv.c,v 1.37 2003/10/14 00:40:14 guy Exp $
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*
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* Laurent Deniel <laurent.deniel@free.fr>
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef WIN32
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#ifndef AVOID_DNS_TIMEOUT
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#define AVOID_DNS_TIMEOUT
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#endif
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#include <signal.h>
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h> /* needed to define AF_ values on UNIX */
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#endif
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#ifdef HAVE_WINSOCK2_H
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#include <winsock2.h> /* needed to define AF_ values on Windows */
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#endif
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#ifdef AVOID_DNS_TIMEOUT
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# include <setjmp.h>
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#endif
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#ifdef NEED_INET_ATON_H
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# include "inet_aton.h"
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#endif
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#ifdef NEED_INET_V6DEFS_H
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# include "inet_v6defs.h"
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#endif
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#ifdef HAVE_GNU_ADNS
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# include <errno.h>
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# include <adns.h>
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#endif
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#if defined(WIN32) && defined(INET6)
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# include <ws2tcpip.h>
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#endif
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#include "packet.h"
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#include "ipv6-utils.h"
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#include "resolv.h"
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#include "filesystem.h"
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#include "prefs.h"
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#define ENAME_ETHERS "ethers"
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#define ENAME_IPXNETS "ipxnets"
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#define ENAME_MANUF "manuf"
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#define MAXMANUFLEN 9 /* max vendor name length with ending '\0' */
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#define HASHETHSIZE 1024
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#define HASHHOSTSIZE 1024
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#define HASHIPXNETSIZE 256
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#define HASHMANUFSIZE 256
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#define HASHPORTSIZE 256
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/* hash table used for host and port lookup */
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#define HASH_IPV4_ADDRESS(addr) ((addr) & (HASHHOSTSIZE - 1))
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#define HASH_PORT(port) ((port) & (HASHPORTSIZE - 1))
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typedef struct hashname {
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guint addr;
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guchar name[MAXNAMELEN];
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gboolean is_dummy_entry; /* name is IP address in dot format */
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struct hashname *next;
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} hashname_t;
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/* hash table used for IPX network lookup */
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/* XXX - check goodness of hash function */
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#define HASH_IPX_NET(net) ((net) & (HASHIPXNETSIZE - 1))
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typedef struct hashname hashipxnet_t;
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/* hash tables used for ethernet and manufacturer lookup */
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#define HASH_ETH_ADDRESS(addr) \
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(((((addr)[2] << 8) | (addr)[3]) ^ (((addr)[4] << 8) | (addr)[5])) & \
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(HASHETHSIZE - 1))
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#define HASH_ETH_MANUF(addr) (((int)(addr)[2]) & (HASHMANUFSIZE - 1))
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typedef struct hashmanuf {
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guint8 addr[3];
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char name[MAXMANUFLEN];
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struct hashmanuf *next;
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} hashmanuf_t;
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typedef struct hashether {
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guint8 addr[6];
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char name[MAXNAMELEN];
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gboolean is_dummy_entry; /* not a complete entry */
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struct hashether *next;
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} hashether_t;
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/* internal ethernet type */
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typedef struct _ether
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{
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guint8 addr[6];
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char name[MAXNAMELEN];
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} ether_t;
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/* internal ipxnet type */
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typedef struct _ipxnet
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{
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guint addr;
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char name[MAXNAMELEN];
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} ipxnet_t;
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static hashname_t *host_table[HASHHOSTSIZE];
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static hashname_t *udp_port_table[HASHPORTSIZE];
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static hashname_t *tcp_port_table[HASHPORTSIZE];
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static hashname_t *sctp_port_table[HASHPORTSIZE];
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static hashether_t *eth_table[HASHETHSIZE];
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static hashmanuf_t *manuf_table[HASHMANUFSIZE];
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static hashether_t *(*wka_table[48])[HASHETHSIZE];
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static hashipxnet_t *ipxnet_table[HASHIPXNETSIZE];
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static int eth_resolution_initialized = 0;
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static int ipxnet_resolution_initialized = 0;
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static hashether_t *add_eth_name(const guint8 *addr, const guchar *name);
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/*
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* Flag controlling what names to resolve.
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*/
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guint32 g_resolv_flags;
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/*
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* Global variables (can be changed in GUI sections)
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* XXX - they could be changed in GUI code, but there's currently no
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* GUI code to change them.
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*/
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gchar *g_ethers_path = NULL; /* global ethers file */
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gchar *g_pethers_path = NULL; /* personal ethers file */
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gchar *g_ipxnets_path = NULL; /* global ipxnets file */
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gchar *g_pipxnets_path = NULL; /* personal ipxnets file */
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/* first resolving call */
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/* GNU ADNS */
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#ifdef HAVE_GNU_ADNS
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adns_state ads;
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int adns_currently_queued = 0;
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typedef struct _adns_queue_msg
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{
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gboolean submitted;
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guint32 ip4_addr;
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struct e_in6_addr ip6_addr;
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int type;
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adns_query query;
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} adns_queue_msg_t;
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GList *adns_queue_head = NULL;
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#endif /* HAVE_GNU_ADNS */
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/*
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* Local function definitions
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*/
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static guchar *serv_name_lookup(guint port, port_type proto)
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{
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int hash_idx;
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hashname_t *tp;
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hashname_t **table;
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char *serv_proto = NULL;
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struct servent *servp;
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switch(proto) {
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case PT_UDP:
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table = udp_port_table;
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serv_proto = "udp";
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break;
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case PT_TCP:
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table = tcp_port_table;
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serv_proto = "tcp";
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break;
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case PT_SCTP:
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table = sctp_port_table;
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serv_proto = "sctp";
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break;
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default:
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/* not yet implemented */
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return NULL;
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/*NOTREACHED*/
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break;
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} /* proto */
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hash_idx = HASH_PORT(port);
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tp = table[hash_idx];
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if( tp == NULL ) {
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tp = table[hash_idx] = (hashname_t *)g_malloc(sizeof(hashname_t));
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} else {
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while(1) {
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if( tp->addr == port ) {
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return tp->name;
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}
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if (tp->next == NULL) {
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tp->next = (hashname_t *)g_malloc(sizeof(hashname_t));
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tp = tp->next;
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break;
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}
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tp = tp->next;
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}
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}
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/* fill in a new entry */
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tp->addr = port;
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tp->next = NULL;
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if (!(g_resolv_flags & RESOLV_TRANSPORT) ||
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(servp = getservbyport(g_htons(port), serv_proto)) == NULL) {
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/* unknown port */
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sprintf(tp->name, "%d", port);
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} else {
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strncpy(tp->name, servp->s_name, MAXNAMELEN);
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tp->name[MAXNAMELEN-1] = '\0';
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}
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return (tp->name);
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} /* serv_name_lookup */
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#ifdef AVOID_DNS_TIMEOUT
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#define DNS_TIMEOUT 2 /* max sec per call */
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jmp_buf hostname_env;
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static void abort_network_query(int sig _U_)
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{
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longjmp(hostname_env, 1);
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}
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#endif /* AVOID_DNS_TIMEOUT */
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static guchar *host_name_lookup(guint addr, gboolean *found)
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{
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int hash_idx;
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hashname_t * volatile tp;
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struct hostent *hostp;
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#ifdef HAVE_GNU_ADNS
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adns_queue_msg_t *qmsg;
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#endif
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*found = TRUE;
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hash_idx = HASH_IPV4_ADDRESS(addr);
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tp = host_table[hash_idx];
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if( tp == NULL ) {
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tp = host_table[hash_idx] = (hashname_t *)g_malloc(sizeof(hashname_t));
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} else {
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while(1) {
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if( tp->addr == addr ) {
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if (tp->is_dummy_entry)
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*found = FALSE;
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return tp->name;
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}
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if (tp->next == NULL) {
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tp->next = (hashname_t *)g_malloc(sizeof(hashname_t));
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tp = tp->next;
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break;
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}
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tp = tp->next;
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}
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}
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/* fill in a new entry */
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tp->addr = addr;
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tp->next = NULL;
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#ifdef HAVE_GNU_ADNS
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if ((g_resolv_flags & RESOLV_CONCURRENT) &&
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prefs.name_resolve_concurrency > 0) {
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qmsg = g_malloc(sizeof(adns_queue_msg_t));
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qmsg->type = AF_INET;
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qmsg->ip4_addr = addr;
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qmsg->submitted = FALSE;
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adns_queue_head = g_list_append(adns_queue_head, (gpointer) qmsg);
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tp->is_dummy_entry = TRUE;
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ip_to_str_buf((guint8 *)&addr, tp->name);
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return tp->name;
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}
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#endif /* HAVE_GNU_ADNS */
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/*
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* The Windows "gethostbyaddr()" insists on translating 0.0.0.0 to
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* the name of the host on which it's running; to work around that
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* botch, we don't try to translate an all-zero IP address to a host
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* name.
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*/
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if (addr != 0 && (g_resolv_flags & RESOLV_NETWORK)) {
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/* Use async DNS if possible, else fall back to timeouts,
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* else call gethostbyaddr and hope for the best
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*/
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# ifdef AVOID_DNS_TIMEOUT
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/* Quick hack to avoid DNS/YP timeout */
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if (!setjmp(hostname_env)) {
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signal(SIGALRM, abort_network_query);
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alarm(DNS_TIMEOUT);
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# endif /* AVOID_DNS_TIMEOUT */
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hostp = gethostbyaddr((char *)&addr, 4, AF_INET);
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# ifdef AVOID_DNS_TIMEOUT
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alarm(0);
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# endif /* AVOID_DNS_TIMEOUT */
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if (hostp != NULL) {
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strncpy(tp->name, hostp->h_name, MAXNAMELEN);
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tp->name[MAXNAMELEN-1] = '\0';
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tp->is_dummy_entry = FALSE;
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return tp->name;
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}
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# ifdef AVOID_DNS_TIMEOUT
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}
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# endif /* AVOID_DNS_TIMEOUT */
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}
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/* unknown host or DNS timeout */
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ip_to_str_buf((guint8 *)&addr, tp->name);
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tp->is_dummy_entry = TRUE;
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*found = FALSE;
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return (tp->name);
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} /* host_name_lookup */
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static guchar *host_name_lookup6(struct e_in6_addr *addr, gboolean *found)
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{
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static guchar name[MAXNAMELEN];
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#ifdef INET6
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struct hostent *hostp;
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if (g_resolv_flags & RESOLV_NETWORK) {
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#ifdef AVOID_DNS_TIMEOUT
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/* Quick hack to avoid DNS/YP timeout */
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if (!setjmp(hostname_env)) {
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signal(SIGALRM, abort_network_query);
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alarm(DNS_TIMEOUT);
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#endif /* AVOID_DNS_TIMEOUT */
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hostp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET6);
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#ifdef AVOID_DNS_TIMEOUT
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alarm(0);
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#endif
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if (hostp != NULL) {
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strncpy(name, hostp->h_name, MAXNAMELEN);
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name[MAXNAMELEN-1] = '\0';
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*found = TRUE;
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return name;
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}
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#ifdef AVOID_DNS_TIMEOUT
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}
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#endif
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}
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/* unknown host or DNS timeout */
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#endif /* INET6 */
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*found = FALSE;
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sprintf(name, "%s", ip6_to_str(addr));
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return (name);
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}
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/*
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* Miscellaneous functions
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*/
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static int fgetline(char **buf, int *size, FILE *fp)
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{
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int len;
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int c;
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if (fp == NULL)
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return -1;
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if (*buf == NULL) {
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if (*size == 0)
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*size = BUFSIZ;
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if ((*buf = g_malloc(*size)) == NULL)
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return -1;
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}
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if (feof(fp))
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return -1;
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len = 0;
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while ((c = getc(fp)) != EOF && c != '\n') {
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if (len+1 >= *size) {
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if ((*buf = g_realloc(*buf, *size += BUFSIZ)) == NULL)
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return -1;
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}
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(*buf)[len++] = c;
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}
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if (len == 0 && c == EOF)
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return -1;
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(*buf)[len] = '\0';
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return len;
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} /* fgetline */
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/*
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* Ethernet / manufacturer resolution
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*
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* The following functions implement ethernet address resolution and
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* ethers files parsing (see ethers(4)).
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*
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* The manuf file has the same format as ethers(4) except that names are
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* truncated to MAXMANUFLEN-1 characters and that an address contains
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* only 3 bytes (instead of 6).
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*
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* Notes:
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*
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* I decide to not use the existing functions (see ethers(3) on some
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* operating systems) for the following reasons:
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* - performance gains (use of hash tables and some other enhancements),
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* - use of two ethers files (system-wide and per user),
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* - avoid the use of NIS maps,
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* - lack of these functions on some systems.
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*
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* So the following functions do _not_ behave as the standard ones.
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*
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* -- Laurent.
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*/
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/*
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* If "manuf_file" is FALSE, parse a 6-byte MAC address.
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* If "manuf_file" is TRUE, parse an up-to-6-byte sequence with an optional
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* mask.
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*/
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static gboolean
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parse_ether_address(const char *cp, ether_t *eth, unsigned int *mask,
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gboolean manuf_file)
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{
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int i;
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unsigned long num;
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char *p;
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char sep = '\0';
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for (i = 0; i < 6; i++) {
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/* Get a hex number, 1 or 2 digits, no sign characters allowed. */
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if (!isxdigit((unsigned char)*cp))
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return FALSE;
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num = strtoul(cp, &p, 16);
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if (p == cp)
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return FALSE; /* failed */
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if (num > 0xFF)
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return FALSE; /* not a valid octet */
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eth->addr[i] = num;
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cp = p; /* skip past the number */
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/* OK, what character terminated the octet? */
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if (*cp == '/') {
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/* "/" - this has a mask. */
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if (!manuf_file) {
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/* Entries with masks are allowed only in the "manuf" files. */
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return FALSE;
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}
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cp++; /* skip past the '/' to get to the mask */
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if (!isdigit((unsigned char)*cp))
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return FALSE; /* no sign allowed */
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num = strtoul(cp, &p, 10);
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if (p == cp)
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return FALSE; /* failed */
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cp = p; /* skip past the number */
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if (*cp != '\0' && !isspace((unsigned char)*cp))
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return FALSE; /* bogus terminator */
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if (num == 0 || num >= 48)
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return FALSE; /* bogus mask */
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/* Mask out the bits not covered by the mask */
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*mask = num;
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for (i = 0; num >= 8; i++, num -= 8)
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; /* skip octets entirely covered by the mask */
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/* Mask out the first masked octet */
|
|
eth->addr[i] &= (0xFF << (8 - num));
|
|
i++;
|
|
/* Mask out completely-masked-out octets */
|
|
for (; i < 6; i++)
|
|
eth->addr[i] = 0;
|
|
return TRUE;
|
|
}
|
|
if (*cp == '\0') {
|
|
/* We're at the end of the address, and there's no mask. */
|
|
if (i == 2) {
|
|
/* We got 3 bytes, so this is a manufacturer ID. */
|
|
if (!manuf_file) {
|
|
/* Manufacturer IDs are only allowed in the "manuf"
|
|
files. */
|
|
return FALSE;
|
|
}
|
|
/* Indicate that this is a manufacturer ID (0 is not allowed
|
|
as a mask). */
|
|
*mask = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
if (i == 5) {
|
|
/* We got 6 bytes, so this is a MAC address.
|
|
If we're reading one of the "manuf" files, indicate that
|
|
this is a MAC address (48 is not allowed as a mask). */
|
|
if (manuf_file)
|
|
*mask = 48;
|
|
return TRUE;
|
|
}
|
|
|
|
/* We didn't get 3 or 6 bytes, and there's no mask; this is
|
|
illegal. */
|
|
return FALSE;
|
|
} else {
|
|
if (sep == '\0') {
|
|
/* We don't know the separator used in this number; it can either
|
|
be ':', '-', or '.'. */
|
|
if (*cp != ':' && *cp != '-' && *cp != '.')
|
|
return FALSE;
|
|
sep = *cp; /* subsequent separators must be the same */
|
|
} else {
|
|
/* It has to be the same as the first separator */
|
|
if (*cp != sep)
|
|
return FALSE;
|
|
}
|
|
}
|
|
cp++;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int parse_ether_line(char *line, ether_t *eth, unsigned int *mask,
|
|
gboolean manuf_file)
|
|
{
|
|
/*
|
|
* See man ethers(4) for ethers file format
|
|
* (not available on all systems).
|
|
* We allow both ethernet address separators (':' and '-'),
|
|
* as well as Ethereal's '.' separator.
|
|
*/
|
|
|
|
gchar *cp;
|
|
|
|
if ((cp = strchr(line, '#')))
|
|
*cp = '\0';
|
|
|
|
if ((cp = strtok(line, " \t\n")) == NULL)
|
|
return -1;
|
|
|
|
if (!parse_ether_address(cp, eth, mask, manuf_file))
|
|
return -1;
|
|
|
|
if ((cp = strtok(NULL, " \t\n")) == NULL)
|
|
return -1;
|
|
|
|
strncpy(eth->name, cp, MAXNAMELEN);
|
|
eth->name[MAXNAMELEN-1] = '\0';
|
|
|
|
return 0;
|
|
|
|
} /* parse_ether_line */
|
|
|
|
static FILE *eth_p = NULL;
|
|
|
|
static void set_ethent(char *path)
|
|
{
|
|
if (eth_p)
|
|
rewind(eth_p);
|
|
else
|
|
eth_p = fopen(path, "r");
|
|
}
|
|
|
|
static void end_ethent(void)
|
|
{
|
|
if (eth_p) {
|
|
fclose(eth_p);
|
|
eth_p = NULL;
|
|
}
|
|
}
|
|
|
|
static ether_t *get_ethent(unsigned int *mask, gboolean manuf_file)
|
|
{
|
|
|
|
static ether_t eth;
|
|
static int size = 0;
|
|
static char *buf = NULL;
|
|
|
|
if (eth_p == NULL)
|
|
return NULL;
|
|
|
|
while (fgetline(&buf, &size, eth_p) >= 0) {
|
|
if (parse_ether_line(buf, ð, mask, manuf_file) == 0) {
|
|
return ð
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
|
|
} /* get_ethent */
|
|
|
|
static ether_t *get_ethbyname(const guchar *name)
|
|
{
|
|
ether_t *eth;
|
|
|
|
set_ethent(g_ethers_path);
|
|
|
|
while ((eth = get_ethent(NULL, FALSE)) && strncmp(name, eth->name, MAXNAMELEN) != 0)
|
|
;
|
|
|
|
if (eth == NULL) {
|
|
end_ethent();
|
|
|
|
set_ethent(g_pethers_path);
|
|
|
|
while ((eth = get_ethent(NULL, FALSE)) && strncmp(name, eth->name, MAXNAMELEN) != 0)
|
|
;
|
|
|
|
end_ethent();
|
|
}
|
|
|
|
return eth;
|
|
|
|
} /* get_ethbyname */
|
|
|
|
static ether_t *get_ethbyaddr(const guint8 *addr)
|
|
{
|
|
|
|
ether_t *eth;
|
|
|
|
set_ethent(g_ethers_path);
|
|
|
|
while ((eth = get_ethent(NULL, FALSE)) && memcmp(addr, eth->addr, 6) != 0)
|
|
;
|
|
|
|
if (eth == NULL) {
|
|
end_ethent();
|
|
|
|
set_ethent(g_pethers_path);
|
|
|
|
while ((eth = get_ethent(NULL, FALSE)) && memcmp(addr, eth->addr, 6) != 0)
|
|
;
|
|
|
|
end_ethent();
|
|
}
|
|
|
|
return eth;
|
|
|
|
} /* get_ethbyaddr */
|
|
|
|
static int hash_eth_wka(const guint8 *addr, unsigned int mask)
|
|
{
|
|
if (mask <= 8) {
|
|
/* All but the topmost byte is masked out */
|
|
return (addr[0] & (0xFF << (8 - mask))) & (HASHETHSIZE - 1);
|
|
}
|
|
mask -= 8;
|
|
if (mask <= 8) {
|
|
/* All but the topmost 2 bytes are masked out */
|
|
return ((addr[0] << 8) | (addr[1] & (0xFF << (8 - mask)))) &
|
|
(HASHETHSIZE - 1);
|
|
}
|
|
mask -= 8;
|
|
if (mask <= 8) {
|
|
/* All but the topmost 3 bytes are masked out */
|
|
return ((addr[0] << 16) | (addr[1] << 8) | (addr[2] & (0xFF << (8 - mask))))
|
|
& (HASHETHSIZE - 1);
|
|
}
|
|
mask -= 8;
|
|
if (mask <= 8) {
|
|
/* All but the topmost 4 bytes are masked out */
|
|
return ((((addr[0] << 8) | addr[1]) ^
|
|
((addr[2] << 8) | (addr[3] & (0xFF << (8 - mask)))))) &
|
|
(HASHETHSIZE - 1);
|
|
}
|
|
mask -= 8;
|
|
if (mask <= 8) {
|
|
/* All but the topmost 5 bytes are masked out */
|
|
return ((((addr[1] << 8) | addr[2]) ^
|
|
((addr[3] << 8) | (addr[4] & (0xFF << (8 - mask)))))) &
|
|
(HASHETHSIZE - 1);
|
|
}
|
|
mask -= 8;
|
|
/* No bytes are fully masked out */
|
|
return ((((addr[1] << 8) | addr[2]) ^
|
|
((addr[3] << 8) | (addr[4] & (0xFF << (8 - mask)))))) &
|
|
(HASHETHSIZE - 1);
|
|
}
|
|
|
|
static void add_manuf_name(guint8 *addr, unsigned int mask, guchar *name)
|
|
{
|
|
int hash_idx;
|
|
hashmanuf_t *tp;
|
|
hashether_t *(*wka_tp)[HASHETHSIZE], *etp;
|
|
|
|
if (mask == 48) {
|
|
/* This is a well-known MAC address; just add this to the Ethernet
|
|
hash table */
|
|
add_eth_name(addr, name);
|
|
return;
|
|
}
|
|
|
|
if (mask == 0) {
|
|
/* This is a manufacturer ID; add it to the manufacturer ID hash table */
|
|
|
|
hash_idx = HASH_ETH_MANUF(addr);
|
|
|
|
tp = manuf_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = manuf_table[hash_idx] = (hashmanuf_t *)g_malloc(sizeof(hashmanuf_t));
|
|
} else {
|
|
while(1) {
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashmanuf_t *)g_malloc(sizeof(hashmanuf_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
memcpy(tp->addr, addr, sizeof(tp->addr));
|
|
strncpy(tp->name, name, MAXMANUFLEN);
|
|
tp->name[MAXMANUFLEN-1] = '\0';
|
|
tp->next = NULL;
|
|
return;
|
|
}
|
|
|
|
/* This is a range of well-known addresses; add it to the appropriate
|
|
well-known-address table, creating that table if necessary. */
|
|
wka_tp = wka_table[mask];
|
|
if (wka_tp == NULL)
|
|
wka_tp = wka_table[mask] = g_malloc0(sizeof *wka_table[mask]);
|
|
|
|
hash_idx = hash_eth_wka(addr, mask);
|
|
|
|
etp = (*wka_tp)[hash_idx];
|
|
|
|
if( etp == NULL ) {
|
|
etp = (*wka_tp)[hash_idx] = (hashether_t *)g_malloc(sizeof(hashether_t));
|
|
} else {
|
|
while(1) {
|
|
if (memcmp(etp->addr, addr, sizeof(etp->addr)) == 0) {
|
|
/* address already known */
|
|
return;
|
|
}
|
|
if (etp->next == NULL) {
|
|
etp->next = (hashether_t *)g_malloc(sizeof(hashether_t));
|
|
etp = etp->next;
|
|
break;
|
|
}
|
|
etp = etp->next;
|
|
}
|
|
}
|
|
|
|
memcpy(etp->addr, addr, sizeof(etp->addr));
|
|
strncpy(etp->name, name, MAXNAMELEN);
|
|
etp->name[MAXNAMELEN-1] = '\0';
|
|
etp->next = NULL;
|
|
etp->is_dummy_entry = FALSE;
|
|
|
|
} /* add_manuf_name */
|
|
|
|
static hashmanuf_t *manuf_name_lookup(const guint8 *addr)
|
|
{
|
|
int hash_idx;
|
|
hashmanuf_t *tp;
|
|
|
|
hash_idx = HASH_ETH_MANUF(addr);
|
|
|
|
tp = manuf_table[hash_idx];
|
|
|
|
while(tp != NULL) {
|
|
if (memcmp(tp->addr, addr, sizeof(tp->addr)) == 0) {
|
|
return tp;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
|
|
return NULL;
|
|
|
|
} /* manuf_name_lookup */
|
|
|
|
static hashether_t *wka_name_lookup(const guint8 *addr, unsigned int mask)
|
|
{
|
|
int hash_idx;
|
|
hashether_t *(*wka_tp)[HASHETHSIZE];
|
|
hashether_t *tp;
|
|
guint8 masked_addr[6];
|
|
unsigned int num;
|
|
int i;
|
|
|
|
wka_tp = wka_table[mask];
|
|
if (wka_tp == NULL) {
|
|
/* There are no entries in the table for that mask value, as there is
|
|
no table for that mask value. */
|
|
return NULL;
|
|
}
|
|
|
|
/* Get the part of the address covered by the mask. */
|
|
for (i = 0, num = mask; num >= 8; i++, num -= 8)
|
|
masked_addr[i] = addr[i]; /* copy octets entirely covered by the mask */
|
|
/* Mask out the first masked octet */
|
|
masked_addr[i] = addr[i] & (0xFF << (8 - num));
|
|
i++;
|
|
/* Zero out completely-masked-out octets */
|
|
for (; i < 6; i++)
|
|
masked_addr[i] = 0;
|
|
|
|
hash_idx = hash_eth_wka(masked_addr, mask);
|
|
|
|
tp = (*wka_tp)[hash_idx];
|
|
|
|
while(tp != NULL) {
|
|
if (memcmp(tp->addr, masked_addr, sizeof(tp->addr)) == 0) {
|
|
return tp;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
|
|
return NULL;
|
|
|
|
} /* wka_name_lookup */
|
|
|
|
static void initialize_ethers(void)
|
|
{
|
|
ether_t *eth;
|
|
char *manuf_path;
|
|
unsigned int mask;
|
|
|
|
/* Compute the pathname of the ethers file. */
|
|
if (g_ethers_path == NULL) {
|
|
g_ethers_path = g_malloc(strlen(get_systemfile_dir()) +
|
|
strlen(ENAME_ETHERS) + 2);
|
|
sprintf(g_ethers_path, "%s" G_DIR_SEPARATOR_S "%s",
|
|
get_systemfile_dir(), ENAME_ETHERS);
|
|
}
|
|
|
|
/* Set g_pethers_path here, but don't actually do anything
|
|
* with it. It's used in get_ethbyname() and get_ethbyaddr()
|
|
*/
|
|
if (g_pethers_path == NULL)
|
|
g_pethers_path = get_persconffile_path(ENAME_ETHERS, FALSE);
|
|
|
|
/* manuf hash table initialization */
|
|
|
|
/* Compute the pathname of the manuf file */
|
|
manuf_path = get_datafile_path(ENAME_MANUF);
|
|
|
|
/* Read it and initialize the hash table */
|
|
set_ethent(manuf_path);
|
|
|
|
while ((eth = get_ethent(&mask, TRUE))) {
|
|
add_manuf_name(eth->addr, mask, eth->name);
|
|
}
|
|
|
|
end_ethent();
|
|
|
|
g_free(manuf_path);
|
|
|
|
} /* initialize_ethers */
|
|
|
|
static hashether_t *add_eth_name(const guint8 *addr, const guchar *name)
|
|
{
|
|
int hash_idx;
|
|
hashether_t *tp;
|
|
|
|
hash_idx = HASH_ETH_ADDRESS(addr);
|
|
|
|
tp = eth_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = eth_table[hash_idx] = (hashether_t *)g_malloc(sizeof(hashether_t));
|
|
} else {
|
|
while(1) {
|
|
if (memcmp(tp->addr, addr, sizeof(tp->addr)) == 0) {
|
|
/* address already known */
|
|
if (!tp->is_dummy_entry) {
|
|
return tp;
|
|
} else {
|
|
/* replace this dummy (manuf) entry with a real name */
|
|
break;
|
|
}
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashether_t *)g_malloc(sizeof(hashether_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
memcpy(tp->addr, addr, sizeof(tp->addr));
|
|
strncpy(tp->name, name, MAXNAMELEN);
|
|
tp->name[MAXNAMELEN-1] = '\0';
|
|
tp->next = NULL;
|
|
tp->is_dummy_entry = FALSE;
|
|
|
|
return tp;
|
|
|
|
} /* add_eth_name */
|
|
|
|
static guchar *eth_name_lookup(const guint8 *addr)
|
|
{
|
|
int hash_idx;
|
|
hashmanuf_t *manufp;
|
|
hashether_t *tp;
|
|
ether_t *eth;
|
|
hashether_t *etp;
|
|
unsigned int mask;
|
|
|
|
hash_idx = HASH_ETH_ADDRESS(addr);
|
|
|
|
tp = eth_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = eth_table[hash_idx] = (hashether_t *)g_malloc(sizeof(hashether_t));
|
|
} else {
|
|
while(1) {
|
|
if (memcmp(tp->addr, addr, sizeof(tp->addr)) == 0) {
|
|
return tp->name;
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashether_t *)g_malloc(sizeof(hashether_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
/* fill in a new entry */
|
|
|
|
memcpy(tp->addr, addr, sizeof(tp->addr));
|
|
tp->next = NULL;
|
|
|
|
if ( (eth = get_ethbyaddr(addr)) == NULL) {
|
|
/* Unknown name. Try looking for it in the well-known-address
|
|
tables for well-known address ranges smaller than 2^24. */
|
|
mask = 7;
|
|
for (;;) {
|
|
/* Only the topmost 5 bytes participate fully */
|
|
if ((etp = wka_name_lookup(addr, mask+40)) != NULL) {
|
|
sprintf(tp->name, "%s_%02x",
|
|
etp->name, addr[5] & (0xFF >> mask));
|
|
tp->is_dummy_entry = TRUE;
|
|
return (tp->name);
|
|
}
|
|
if (mask == 0)
|
|
break;
|
|
mask--;
|
|
}
|
|
|
|
mask = 7;
|
|
for (;;) {
|
|
/* Only the topmost 4 bytes participate fully */
|
|
if ((etp = wka_name_lookup(addr, mask+32)) != NULL) {
|
|
sprintf(tp->name, "%s_%02x:%02x",
|
|
etp->name, addr[4] & (0xFF >> mask), addr[5]);
|
|
tp->is_dummy_entry = TRUE;
|
|
return (tp->name);
|
|
}
|
|
if (mask == 0)
|
|
break;
|
|
mask--;
|
|
}
|
|
|
|
mask = 7;
|
|
for (;;) {
|
|
/* Only the topmost 3 bytes participate fully */
|
|
if ((etp = wka_name_lookup(addr, mask+24)) != NULL) {
|
|
sprintf(tp->name, "%s_%02x:%02x:%02x",
|
|
etp->name, addr[3] & (0xFF >> mask), addr[4], addr[5]);
|
|
tp->is_dummy_entry = TRUE;
|
|
return (tp->name);
|
|
}
|
|
if (mask == 0)
|
|
break;
|
|
mask--;
|
|
}
|
|
|
|
/* Now try looking in the manufacturer table. */
|
|
if ((manufp = manuf_name_lookup(addr)) != NULL) {
|
|
sprintf(tp->name, "%s_%02x:%02x:%02x",
|
|
manufp->name, addr[3], addr[4], addr[5]);
|
|
tp->is_dummy_entry = TRUE;
|
|
return (tp->name);
|
|
}
|
|
|
|
/* Now try looking for it in the well-known-address
|
|
tables for well-known address ranges larger than 2^24. */
|
|
mask = 7;
|
|
for (;;) {
|
|
/* Only the topmost 2 bytes participate fully */
|
|
if ((etp = wka_name_lookup(addr, mask+16)) != NULL) {
|
|
sprintf(tp->name, "%s_%02x:%02x:%02x:%02x",
|
|
etp->name, addr[2] & (0xFF >> mask), addr[3], addr[4],
|
|
addr[5]);
|
|
tp->is_dummy_entry = TRUE;
|
|
return (tp->name);
|
|
}
|
|
if (mask == 0)
|
|
break;
|
|
mask--;
|
|
}
|
|
|
|
mask = 7;
|
|
for (;;) {
|
|
/* Only the topmost byte participates fully */
|
|
if ((etp = wka_name_lookup(addr, mask+8)) != NULL) {
|
|
sprintf(tp->name, "%s_%02x:%02x:%02x:%02x:%02x",
|
|
etp->name, addr[1] & (0xFF >> mask), addr[2], addr[3],
|
|
addr[4], addr[5]);
|
|
tp->is_dummy_entry = TRUE;
|
|
return (tp->name);
|
|
}
|
|
if (mask == 0)
|
|
break;
|
|
mask--;
|
|
}
|
|
|
|
for (mask = 7; mask > 0; mask--) {
|
|
/* Not even the topmost byte participates fully */
|
|
if ((etp = wka_name_lookup(addr, mask)) != NULL) {
|
|
sprintf(tp->name, "%s_%02x:%02x:%02x:%02x:%02x:%02x",
|
|
etp->name, addr[0] & (0xFF >> mask), addr[1], addr[2],
|
|
addr[3], addr[4], addr[5]);
|
|
tp->is_dummy_entry = TRUE;
|
|
return (tp->name);
|
|
}
|
|
}
|
|
|
|
/* No match whatsoever. */
|
|
sprintf(tp->name, "%s", ether_to_str(addr));
|
|
tp->is_dummy_entry = TRUE;
|
|
|
|
} else {
|
|
strncpy(tp->name, eth->name, MAXNAMELEN);
|
|
tp->name[MAXNAMELEN-1] = '\0';
|
|
tp->is_dummy_entry = FALSE;
|
|
}
|
|
|
|
return (tp->name);
|
|
|
|
} /* eth_name_lookup */
|
|
|
|
static guint8 *eth_addr_lookup(const guchar *name)
|
|
{
|
|
ether_t *eth;
|
|
hashether_t *tp;
|
|
hashether_t **table = eth_table;
|
|
int i;
|
|
|
|
/* to be optimized (hash table from name to addr) */
|
|
for (i = 0; i < HASHETHSIZE; i++) {
|
|
tp = table[i];
|
|
while (tp) {
|
|
if (strcmp(tp->name, name) == 0)
|
|
return tp->addr;
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
/* not in hash table : performs a file lookup */
|
|
|
|
if ((eth = get_ethbyname(name)) == NULL)
|
|
return NULL;
|
|
|
|
/* add new entry in hash table */
|
|
|
|
tp = add_eth_name(eth->addr, name);
|
|
|
|
return tp->addr;
|
|
|
|
} /* eth_addr_lookup */
|
|
|
|
|
|
/* IPXNETS */
|
|
static int parse_ipxnets_line(char *line, ipxnet_t *ipxnet)
|
|
{
|
|
/*
|
|
* We allow three address separators (':', '-', and '.'),
|
|
* as well as no separators
|
|
*/
|
|
|
|
gchar *cp;
|
|
guint32 a, a0, a1, a2, a3;
|
|
gboolean found_single_number = FALSE;
|
|
|
|
if ((cp = strchr(line, '#')))
|
|
*cp = '\0';
|
|
|
|
if ((cp = strtok(line, " \t\n")) == NULL)
|
|
return -1;
|
|
|
|
/* Either fill a0,a1,a2,a3 and found_single_number is FALSE,
|
|
* fill a and found_single_number is TRUE,
|
|
* or return -1
|
|
*/
|
|
if (sscanf(cp, "%x:%x:%x:%x", &a0, &a1, &a2, &a3) != 4) {
|
|
if (sscanf(cp, "%x-%x-%x-%x", &a0, &a1, &a2, &a3) != 4) {
|
|
if (sscanf(cp, "%x.%x.%x.%x", &a0, &a1, &a2, &a3) != 4) {
|
|
if (sscanf(cp, "%x", &a) == 1) {
|
|
found_single_number = TRUE;
|
|
}
|
|
else {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((cp = strtok(NULL, " \t\n")) == NULL)
|
|
return -1;
|
|
|
|
if (found_single_number) {
|
|
ipxnet->addr = a;
|
|
}
|
|
else {
|
|
ipxnet->addr = (a0 << 24) | (a1 << 16) | (a2 << 8) | a3;
|
|
}
|
|
|
|
strncpy(ipxnet->name, cp, MAXNAMELEN);
|
|
ipxnet->name[MAXNAMELEN-1] = '\0';
|
|
|
|
return 0;
|
|
|
|
} /* parse_ipxnets_line */
|
|
|
|
static FILE *ipxnet_p = NULL;
|
|
|
|
static void set_ipxnetent(char *path)
|
|
{
|
|
if (ipxnet_p)
|
|
rewind(ipxnet_p);
|
|
else
|
|
ipxnet_p = fopen(path, "r");
|
|
}
|
|
|
|
static void end_ipxnetent(void)
|
|
{
|
|
if (ipxnet_p) {
|
|
fclose(ipxnet_p);
|
|
ipxnet_p = NULL;
|
|
}
|
|
}
|
|
|
|
static ipxnet_t *get_ipxnetent(void)
|
|
{
|
|
|
|
static ipxnet_t ipxnet;
|
|
static int size = 0;
|
|
static char *buf = NULL;
|
|
|
|
if (ipxnet_p == NULL)
|
|
return NULL;
|
|
|
|
while (fgetline(&buf, &size, ipxnet_p) >= 0) {
|
|
if (parse_ipxnets_line(buf, &ipxnet) == 0) {
|
|
return &ipxnet;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
|
|
} /* get_ipxnetent */
|
|
|
|
static ipxnet_t *get_ipxnetbyname(const guchar *name)
|
|
{
|
|
ipxnet_t *ipxnet;
|
|
|
|
set_ipxnetent(g_ipxnets_path);
|
|
|
|
while ((ipxnet = get_ipxnetent()) && strncmp(name, ipxnet->name, MAXNAMELEN) != 0)
|
|
;
|
|
|
|
if (ipxnet == NULL) {
|
|
end_ipxnetent();
|
|
|
|
set_ipxnetent(g_pipxnets_path);
|
|
|
|
while ((ipxnet = get_ipxnetent()) && strncmp(name, ipxnet->name, MAXNAMELEN) != 0)
|
|
;
|
|
|
|
end_ipxnetent();
|
|
}
|
|
|
|
return ipxnet;
|
|
|
|
} /* get_ipxnetbyname */
|
|
|
|
static ipxnet_t *get_ipxnetbyaddr(guint32 addr)
|
|
{
|
|
|
|
ipxnet_t *ipxnet;
|
|
|
|
set_ipxnetent(g_ipxnets_path);
|
|
|
|
while ((ipxnet = get_ipxnetent()) && (addr != ipxnet->addr) ) ;
|
|
|
|
if (ipxnet == NULL) {
|
|
end_ipxnetent();
|
|
|
|
set_ipxnetent(g_pipxnets_path);
|
|
|
|
while ((ipxnet = get_ipxnetent()) && (addr != ipxnet->addr) )
|
|
;
|
|
|
|
end_ipxnetent();
|
|
}
|
|
|
|
return ipxnet;
|
|
|
|
} /* get_ipxnetbyaddr */
|
|
|
|
static void initialize_ipxnets(void)
|
|
{
|
|
/* Compute the pathname of the ipxnets file.
|
|
*
|
|
* XXX - is there a notion of an "ipxnets file" in any flavor of
|
|
* UNIX, or with any add-on Netware package for UNIX? If not,
|
|
* should the UNIX version of the ipxnets file be in the datafile
|
|
* directory as well?
|
|
*/
|
|
if (g_ipxnets_path == NULL) {
|
|
g_ipxnets_path = g_malloc(strlen(get_systemfile_dir()) +
|
|
strlen(ENAME_IPXNETS) + 2);
|
|
sprintf(g_ipxnets_path, "%s" G_DIR_SEPARATOR_S "%s",
|
|
get_systemfile_dir(), ENAME_IPXNETS);
|
|
}
|
|
|
|
/* Set g_pipxnets_path here, but don't actually do anything
|
|
* with it. It's used in get_ipxnetbyname() and get_ipxnetbyaddr()
|
|
*/
|
|
if (g_pipxnets_path == NULL)
|
|
g_pipxnets_path = get_persconffile_path(ENAME_IPXNETS, FALSE);
|
|
|
|
} /* initialize_ipxnets */
|
|
|
|
static hashipxnet_t *add_ipxnet_name(guint addr, const guchar *name)
|
|
{
|
|
int hash_idx;
|
|
hashipxnet_t *tp;
|
|
|
|
hash_idx = HASH_IPX_NET(addr);
|
|
|
|
tp = ipxnet_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = ipxnet_table[hash_idx] = (hashipxnet_t *)g_malloc(sizeof(hashipxnet_t));
|
|
} else {
|
|
while(1) {
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashipxnet_t *)g_malloc(sizeof(hashipxnet_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
tp->addr = addr;
|
|
strncpy(tp->name, name, MAXNAMELEN);
|
|
tp->name[MAXNAMELEN-1] = '\0';
|
|
tp->next = NULL;
|
|
|
|
return tp;
|
|
|
|
} /* add_ipxnet_name */
|
|
|
|
static guchar *ipxnet_name_lookup(const guint addr)
|
|
{
|
|
int hash_idx;
|
|
hashipxnet_t *tp;
|
|
ipxnet_t *ipxnet;
|
|
|
|
hash_idx = HASH_IPX_NET(addr);
|
|
|
|
tp = ipxnet_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = ipxnet_table[hash_idx] = (hashipxnet_t *)g_malloc(sizeof(hashipxnet_t));
|
|
} else {
|
|
while(1) {
|
|
if (tp->addr == addr) {
|
|
return tp->name;
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashipxnet_t *)g_malloc(sizeof(hashipxnet_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
/* fill in a new entry */
|
|
|
|
tp->addr = addr;
|
|
tp->next = NULL;
|
|
|
|
if ( (ipxnet = get_ipxnetbyaddr(addr)) == NULL) {
|
|
/* unknown name */
|
|
sprintf(tp->name, "%X", addr);
|
|
|
|
} else {
|
|
strncpy(tp->name, ipxnet->name, MAXNAMELEN);
|
|
tp->name[MAXNAMELEN-1] = '\0';
|
|
}
|
|
|
|
return (tp->name);
|
|
|
|
} /* ipxnet_name_lookup */
|
|
|
|
static guint ipxnet_addr_lookup(const guchar *name, gboolean *success)
|
|
{
|
|
ipxnet_t *ipxnet;
|
|
hashipxnet_t *tp;
|
|
hashipxnet_t **table = ipxnet_table;
|
|
int i;
|
|
|
|
/* to be optimized (hash table from name to addr) */
|
|
for (i = 0; i < HASHIPXNETSIZE; i++) {
|
|
tp = table[i];
|
|
while (tp) {
|
|
if (strcmp(tp->name, name) == 0)
|
|
return tp->addr;
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
/* not in hash table : performs a file lookup */
|
|
|
|
if ((ipxnet = get_ipxnetbyname(name)) == NULL) {
|
|
*success = FALSE;
|
|
return 0;
|
|
}
|
|
|
|
/* add new entry in hash table */
|
|
|
|
tp = add_ipxnet_name(ipxnet->addr, name);
|
|
|
|
*success = TRUE;
|
|
return tp->addr;
|
|
|
|
} /* ipxnet_addr_lookup */
|
|
|
|
|
|
/*
|
|
* External Functions
|
|
*/
|
|
|
|
#ifdef HAVE_GNU_ADNS
|
|
|
|
void
|
|
host_name_lookup_init(void) {
|
|
/* XXX - Any flags we should be using? */
|
|
/* XXX - We could provide config settings for DNS servers, and
|
|
pass them to ADNS with adns_init_strcfg */
|
|
adns_init(&ads, 0, 0 /*0=>stderr*/);
|
|
adns_currently_queued = 0;
|
|
}
|
|
|
|
/* XXX - The ADNS "documentation" isn't very clear:
|
|
* - Do we need to keep our query structures around?
|
|
*/
|
|
gint
|
|
host_name_lookup_process(gpointer data _U_) {
|
|
adns_queue_msg_t *almsg;
|
|
GList *cur;
|
|
char addr_str[] = "111.222.333.444.in-addr.arpa.";
|
|
guint8 *addr_bytes;
|
|
adns_answer *ans;
|
|
int ret;
|
|
gboolean dequeue;
|
|
|
|
adns_queue_head = g_list_first(adns_queue_head);
|
|
|
|
cur = adns_queue_head;
|
|
while (cur && adns_currently_queued <= prefs.name_resolve_concurrency) {
|
|
almsg = (adns_queue_msg_t *) cur->data;
|
|
if (! almsg->submitted && almsg->type == AF_INET) {
|
|
addr_bytes = (guint8 *) &almsg->ip4_addr;
|
|
sprintf(addr_str, "%u.%u.%u.%u.in-addr.arpa.", addr_bytes[3],
|
|
addr_bytes[2], addr_bytes[1], addr_bytes[0]);
|
|
adns_submit (ads, addr_str, adns_r_ptr, 0, NULL, &almsg->query);
|
|
almsg->submitted = TRUE;
|
|
adns_currently_queued++;
|
|
}
|
|
cur = cur->next;
|
|
}
|
|
|
|
cur = adns_queue_head;
|
|
while (cur) {
|
|
dequeue = FALSE;
|
|
almsg = (adns_queue_msg_t *) cur->data;
|
|
if (almsg->submitted) {
|
|
ret = adns_check(ads, &almsg->query, &ans, NULL);
|
|
if (ret == 0) {
|
|
if (ans->status == adns_s_ok) {
|
|
add_host_name(almsg->ip4_addr, *ans->rrs.str);
|
|
}
|
|
dequeue = TRUE;
|
|
}
|
|
}
|
|
cur = cur->next;
|
|
if (dequeue) {
|
|
adns_queue_head = g_list_remove(adns_queue_head, (void *) almsg);
|
|
g_free(almsg);
|
|
adns_currently_queued--;
|
|
}
|
|
}
|
|
|
|
/* Keep the timeout in place */
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
host_name_lookup_cleanup(void) {
|
|
void *qdata;
|
|
|
|
adns_queue_head = g_list_first(adns_queue_head);
|
|
while (adns_queue_head) {
|
|
qdata = adns_queue_head->data;
|
|
adns_queue_head = g_list_remove(adns_queue_head, qdata);
|
|
g_free(qdata);
|
|
}
|
|
|
|
adns_finish(ads);
|
|
}
|
|
|
|
#else
|
|
|
|
void
|
|
host_name_lookup_init(void) {
|
|
}
|
|
|
|
gint
|
|
host_name_lookup_process(gpointer data _U_) {
|
|
/* Kill the timeout, as there's nothing for it to do */
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
host_name_lookup_cleanup(void) {
|
|
}
|
|
|
|
#endif /* HAVE_GNU_ADNS */
|
|
|
|
extern guchar *get_hostname(guint addr)
|
|
{
|
|
gboolean found;
|
|
|
|
if (!(g_resolv_flags & RESOLV_NETWORK))
|
|
return ip_to_str((guint8 *)&addr);
|
|
|
|
return host_name_lookup(addr, &found);
|
|
}
|
|
|
|
extern const guchar *get_hostname6(struct e_in6_addr *addr)
|
|
{
|
|
gboolean found;
|
|
|
|
#ifdef INET6
|
|
if (!(g_resolv_flags & RESOLV_NETWORK))
|
|
return ip6_to_str(addr);
|
|
#ifdef SOLARIS8_INET6
|
|
if (IN6_IS_ADDR_LINKLOCAL((struct in6_addr*)addr) || IN6_IS_ADDR_MULTICAST((struct in6_addr*)addr))
|
|
#else
|
|
if (IN6_IS_ADDR_LINKLOCAL(addr) || IN6_IS_ADDR_MULTICAST(addr))
|
|
#endif
|
|
return ip6_to_str(addr);
|
|
#endif
|
|
|
|
return host_name_lookup6(addr, &found);
|
|
}
|
|
|
|
extern void add_host_name(guint addr, const guchar *name)
|
|
{
|
|
int hash_idx;
|
|
hashname_t *tp;
|
|
|
|
hash_idx = HASH_IPV4_ADDRESS(addr);
|
|
|
|
tp = host_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = host_table[hash_idx] = (hashname_t *)g_malloc(sizeof(hashname_t));
|
|
} else {
|
|
while(1) {
|
|
if (tp->addr == addr) {
|
|
/* address already known */
|
|
if (!tp->is_dummy_entry) {
|
|
return;
|
|
} else {
|
|
/* replace this dummy entry with the new one */
|
|
break;
|
|
}
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashname_t *)g_malloc(sizeof(hashname_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
strncpy(tp->name, name, MAXNAMELEN);
|
|
tp->name[MAXNAMELEN-1] = '\0';
|
|
tp->addr = addr;
|
|
tp->next = NULL;
|
|
tp->is_dummy_entry = FALSE;
|
|
|
|
} /* add_host_name */
|
|
|
|
extern guchar *get_udp_port(guint port)
|
|
{
|
|
static gchar str[3][MAXNAMELEN];
|
|
static gchar *cur;
|
|
|
|
if (!(g_resolv_flags & RESOLV_TRANSPORT)) {
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
sprintf(cur, "%u", port);
|
|
return cur;
|
|
}
|
|
|
|
return serv_name_lookup(port, PT_UDP);
|
|
|
|
} /* get_udp_port */
|
|
|
|
extern guchar *get_tcp_port(guint port)
|
|
{
|
|
static gchar str[3][MAXNAMELEN];
|
|
static gchar *cur;
|
|
|
|
if (!(g_resolv_flags & RESOLV_TRANSPORT)) {
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
sprintf(cur, "%u", port);
|
|
return cur;
|
|
}
|
|
|
|
return serv_name_lookup(port, PT_TCP);
|
|
|
|
} /* get_tcp_port */
|
|
|
|
extern guchar *get_sctp_port(guint port)
|
|
{
|
|
static gchar str[3][MAXNAMELEN];
|
|
static gchar *cur;
|
|
|
|
if (!(g_resolv_flags & RESOLV_TRANSPORT)) {
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
sprintf(cur, "%u", port);
|
|
return cur;
|
|
}
|
|
|
|
return serv_name_lookup(port, PT_SCTP);
|
|
|
|
} /* get_sctp_port */
|
|
|
|
extern guchar *get_ether_name(const guint8 *addr)
|
|
{
|
|
if (!(g_resolv_flags & RESOLV_MAC))
|
|
return ether_to_str(addr);
|
|
|
|
if (!eth_resolution_initialized) {
|
|
initialize_ethers();
|
|
eth_resolution_initialized = 1;
|
|
}
|
|
|
|
return eth_name_lookup(addr);
|
|
|
|
} /* get_ether_name */
|
|
|
|
/* Look for an ether name in the hash, and return it if found.
|
|
* If it's not found, simply return NULL. We DO NOT make a new
|
|
* hash entry for it with the hex digits turned into a string.
|
|
*/
|
|
guchar *get_ether_name_if_known(const guint8 *addr)
|
|
{
|
|
int hash_idx;
|
|
hashether_t *tp;
|
|
|
|
/* Initialize ether structs if we're the first
|
|
* ether-related function called */
|
|
if (!(g_resolv_flags & RESOLV_MAC))
|
|
return NULL;
|
|
|
|
if (!eth_resolution_initialized) {
|
|
initialize_ethers();
|
|
eth_resolution_initialized = 1;
|
|
}
|
|
|
|
hash_idx = HASH_ETH_ADDRESS(addr);
|
|
|
|
tp = eth_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
/* Hash key not found in table.
|
|
* Force a lookup (and a hash entry) for addr, then call
|
|
* myself. I plan on not getting into an infinite loop because
|
|
* eth_name_lookup() is guaranteed to make a hashtable entry,
|
|
* so when I call myself again, I can never get into this
|
|
* block of code again. Knock on wood...
|
|
*/
|
|
(void) eth_name_lookup(addr);
|
|
return get_ether_name_if_known(addr); /* a well-placed goto would suffice */
|
|
}
|
|
else {
|
|
while(1) {
|
|
if (memcmp(tp->addr, addr, sizeof(tp->addr)) == 0) {
|
|
if (!tp->is_dummy_entry) {
|
|
/* A name was found, and its origin is an ethers file */
|
|
return tp->name;
|
|
}
|
|
else {
|
|
/* A name was found, but it was created, not found in a file */
|
|
return NULL;
|
|
}
|
|
}
|
|
if (tp->next == NULL) {
|
|
/* Read my reason above for why I'm sure I can't get into an infinite loop */
|
|
(void) eth_name_lookup(addr);
|
|
return get_ether_name_if_known(addr); /* a well-placed goto would suffice */
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
g_assert_not_reached();
|
|
return NULL;
|
|
}
|
|
|
|
|
|
extern guint8 *get_ether_addr(const guchar *name)
|
|
{
|
|
|
|
/* force resolution (do not check g_resolv_flags) */
|
|
|
|
if (!eth_resolution_initialized) {
|
|
initialize_ethers();
|
|
eth_resolution_initialized = 1;
|
|
}
|
|
|
|
return eth_addr_lookup(name);
|
|
|
|
} /* get_ether_addr */
|
|
|
|
extern void add_ether_byip(guint ip, const guint8 *eth)
|
|
{
|
|
|
|
guchar *host;
|
|
gboolean found;
|
|
|
|
/* first check that IP address can be resolved */
|
|
|
|
if ((host = host_name_lookup(ip, &found)) == NULL)
|
|
return;
|
|
|
|
/* ok, we can add this entry in the ethers hashtable */
|
|
|
|
if (found)
|
|
add_eth_name(eth, host);
|
|
|
|
} /* add_ether_byip */
|
|
|
|
extern const guchar *get_ipxnet_name(const guint32 addr)
|
|
{
|
|
|
|
if (!(g_resolv_flags & RESOLV_NETWORK)) {
|
|
return ipxnet_to_str_punct(addr, '\0');
|
|
}
|
|
|
|
if (!ipxnet_resolution_initialized) {
|
|
initialize_ipxnets();
|
|
ipxnet_resolution_initialized = 1;
|
|
}
|
|
|
|
return ipxnet_name_lookup(addr);
|
|
|
|
} /* get_ipxnet_name */
|
|
|
|
extern guint32 get_ipxnet_addr(const guchar *name, gboolean *known)
|
|
{
|
|
guint32 addr;
|
|
gboolean success;
|
|
|
|
/* force resolution (do not check g_resolv_flags) */
|
|
|
|
if (!ipxnet_resolution_initialized) {
|
|
initialize_ipxnets();
|
|
ipxnet_resolution_initialized = 1;
|
|
}
|
|
|
|
addr = ipxnet_addr_lookup(name, &success);
|
|
|
|
*known = success;
|
|
return addr;
|
|
|
|
} /* get_ipxnet_addr */
|
|
|
|
extern const guchar *get_manuf_name(const guint8 *addr)
|
|
{
|
|
static gchar str[3][MAXMANUFLEN];
|
|
static gchar *cur;
|
|
hashmanuf_t *manufp;
|
|
|
|
if ((g_resolv_flags & RESOLV_MAC) && !eth_resolution_initialized) {
|
|
initialize_ethers();
|
|
eth_resolution_initialized = 1;
|
|
}
|
|
|
|
if (!(g_resolv_flags & RESOLV_MAC) || ((manufp = manuf_name_lookup(addr)) == NULL)) {
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
sprintf(cur, "%02x:%02x:%02x", addr[0], addr[1], addr[2]);
|
|
return cur;
|
|
}
|
|
|
|
return manufp->name;
|
|
|
|
} /* get_manuf_name */
|
|
|
|
|
|
|
|
/* Translate a string, assumed either to be a dotted-quad IP address or
|
|
* a host name, to a numeric IP address. Return TRUE if we succeed and
|
|
* set "*addrp" to that numeric IP address; return FALSE if we fail.
|
|
* Used more in the dfilter parser rather than in packet dissectors */
|
|
gboolean get_host_ipaddr(const char *host, guint32 *addrp)
|
|
{
|
|
struct in_addr ipaddr;
|
|
struct hostent *hp;
|
|
|
|
/*
|
|
* don't change it to inet_pton(AF_INET), they are not 100% compatible.
|
|
* inet_pton(AF_INET) does not support hexadecimal notation nor
|
|
* less-than-4 octet notation.
|
|
*/
|
|
if (!inet_aton(host, &ipaddr)) {
|
|
/* It's not a valid dotted-quad IP address; is it a valid
|
|
* host name? */
|
|
hp = gethostbyname(host);
|
|
if (hp == NULL) {
|
|
/* No. */
|
|
return FALSE;
|
|
/* Apparently, some versions of gethostbyaddr can
|
|
* return IPv6 addresses. */
|
|
} else if (hp->h_length <= (int) sizeof (struct in_addr)) {
|
|
memcpy(&ipaddr, hp->h_addr, hp->h_length);
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
/* Does the string really contain dotted-quad IP?
|
|
* Check against inet_atons that accept strings such as
|
|
* "130.230" as valid addresses and try to convert them
|
|
* to some form of a classful (host.net) notation.
|
|
*/
|
|
unsigned int a0, a1, a2, a3;
|
|
if (sscanf(host, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
|
|
return FALSE;
|
|
}
|
|
|
|
*addrp = g_ntohl(ipaddr.s_addr);
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Translate IPv6 numeric address or FQDN hostname, into binary IPv6 address.
|
|
* Return TRUE if we succeed and set "*addrp" to that numeric IP address;
|
|
* return FALSE if we fail.
|
|
*/
|
|
gboolean get_host_ipaddr6(const char *host, struct e_in6_addr *addrp)
|
|
{
|
|
struct hostent *hp;
|
|
|
|
if (inet_pton(AF_INET6, host, addrp) == 1)
|
|
return TRUE;
|
|
|
|
/* try FQDN */
|
|
#ifdef HAVE_GETHOSTBYNAME2
|
|
hp = gethostbyname2(host, AF_INET6);
|
|
#else
|
|
hp = NULL;
|
|
#endif
|
|
if (hp != NULL && hp->h_length == sizeof(struct e_in6_addr)) {
|
|
memcpy(addrp, hp->h_addr, hp->h_length);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|