forked from osmocom/wireshark
2899 lines
68 KiB
C
2899 lines
68 KiB
C
/* addr_resolv.c
|
|
* Routines for network object lookup
|
|
*
|
|
* $Id$
|
|
*
|
|
* Laurent Deniel <laurent.deniel@free.fr>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
/*
|
|
* Win32 doesn't have SIGALRM (and it's the OS where name lookup calls
|
|
* are most likely to take a long time, given the way address-to-name
|
|
* lookups are done over NBNS).
|
|
*
|
|
* Mac OS X does have SIGALRM, but if you longjmp() out of a name resolution
|
|
* call in a signal handler, you might crash, because the state of the
|
|
* resolution code that sends messages to lookupd might be inconsistent
|
|
* if you jump out of it in middle of a call.
|
|
*
|
|
* In at least some Linux distributions (e.g., RedHat Linux 9), if ADNS
|
|
* is used, we appear to hang in host_name_lookup6() in a gethostbyaddr()
|
|
* call (and possibly in other gethostbyaddr() calls), because there's
|
|
* a mutex lock held in gethostbyaddr() and it doesn't get released
|
|
* if we longjmp out of it.
|
|
*
|
|
* There's no guarantee that longjmp()ing out of name resolution calls
|
|
* will work on *any* platform; OpenBSD got rid of the alarm/longjmp
|
|
* code in tcpdump, to avoid those sorts of problems, and that was
|
|
* picked up by tcpdump.org tcpdump.
|
|
*
|
|
* So, for now, we do not define AVOID_DNS_TIMEOUT. If we get a
|
|
* significantly more complaints about lookups taking a long time,
|
|
* we can reconsider that decision. (Note that tcpdump originally
|
|
* added that for the benefit of systems using NIS to look up host
|
|
* names; that might now be fixed in NIS implementations, for those
|
|
* sites still using NIS rather than DNS for that....)
|
|
*/
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_NETINET_IN_H
|
|
# include <netinet/in.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_NETDB_H
|
|
#include <netdb.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_ARPA_INET_H
|
|
#include <arpa/inet.h>
|
|
#endif
|
|
|
|
#include <signal.h>
|
|
|
|
#ifdef HAVE_SYS_SOCKET_H
|
|
#include <sys/socket.h> /* needed to define AF_ values on UNIX */
|
|
#endif
|
|
|
|
#ifdef HAVE_WINSOCK2_H
|
|
#include <winsock2.h> /* needed to define AF_ values on Windows */
|
|
#endif
|
|
|
|
#ifdef AVOID_DNS_TIMEOUT
|
|
# include <setjmp.h>
|
|
#endif
|
|
|
|
#ifdef NEED_INET_ATON_H
|
|
# include "inet_aton.h"
|
|
#endif
|
|
|
|
#ifdef NEED_INET_V6DEFS_H
|
|
# include "inet_v6defs.h"
|
|
#endif
|
|
|
|
#if defined(_WIN32) && defined(INET6)
|
|
# include <ws2tcpip.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_C_ARES
|
|
# if defined(_WIN32) && !defined(INET6)
|
|
# define socklen_t unsigned int
|
|
# endif
|
|
# include <ares.h>
|
|
#else
|
|
# ifdef HAVE_GNU_ADNS
|
|
# include <errno.h>
|
|
# include <adns.h>
|
|
# ifdef inet_aton
|
|
# undef inet_aton
|
|
# endif
|
|
# endif /* HAVE_GNU_ADNS */
|
|
#endif /* HAVE_C_ARES */
|
|
|
|
|
|
#include <glib.h>
|
|
|
|
#include "report_err.h"
|
|
#include "packet.h"
|
|
#include "ipv6-utils.h"
|
|
#include "addr_resolv.h"
|
|
#include "filesystem.h"
|
|
|
|
#include <epan/strutil.h>
|
|
#include <wsutil/file_util.h>
|
|
#include <epan/prefs.h>
|
|
#include <epan/emem.h>
|
|
|
|
#define ENAME_HOSTS "hosts"
|
|
#define ENAME_SUBNETS "subnets"
|
|
#define ENAME_ETHERS "ethers"
|
|
#define ENAME_IPXNETS "ipxnets"
|
|
#define ENAME_MANUF "manuf"
|
|
#define ENAME_SERVICES "services"
|
|
|
|
#define MAXMANUFLEN 9 /* max vendor name length with ending '\0' */
|
|
#define HASHETHSIZE 1024
|
|
#define HASHHOSTSIZE 1024
|
|
#define HASHIPXNETSIZE 256
|
|
#define HASHMANUFSIZE 256
|
|
#define HASHPORTSIZE 256
|
|
#define SUBNETLENGTHSIZE 32 /*1-32 inc.*/
|
|
|
|
/* hash table used for IPv4 lookup */
|
|
|
|
#define HASH_IPV4_ADDRESS(addr) ((addr) & (HASHHOSTSIZE - 1))
|
|
|
|
typedef struct hashipv4 {
|
|
guint addr;
|
|
gboolean is_dummy_entry; /* name is IPv4 address in dot format */
|
|
struct hashipv4 *next;
|
|
gchar name[MAXNAMELEN];
|
|
} hashipv4_t;
|
|
|
|
/* hash table used for IPv6 lookup */
|
|
|
|
#define HASH_IPV6_ADDRESS(addr) \
|
|
((((addr).bytes[14] << 8)|((addr).bytes[15])) & (HASHHOSTSIZE - 1))
|
|
|
|
typedef struct hashipv6 {
|
|
struct e_in6_addr addr;
|
|
gchar name[MAXNAMELEN];
|
|
gboolean is_dummy_entry; /* name is IPv6 address in colon format */
|
|
struct hashipv6 *next;
|
|
} hashipv6_t;
|
|
|
|
/* Array of entries of subnets of different lengths */
|
|
typedef struct {
|
|
gsize mask_length; /*1-32*/
|
|
guint32 mask; /* e.g. 255.255.255.*/
|
|
hashipv4_t** subnet_addresses; /* Hash table of subnet addresses */
|
|
} subnet_length_entry_t;
|
|
|
|
/* hash table used for TCP/UDP/SCTP port lookup */
|
|
|
|
#define HASH_PORT(port) ((port) & (HASHPORTSIZE - 1))
|
|
|
|
typedef struct hashport {
|
|
guint16 port;
|
|
gchar name[MAXNAMELEN];
|
|
struct hashport *next;
|
|
} hashport_t;
|
|
|
|
/* hash table used for IPX network lookup */
|
|
|
|
/* XXX - check goodness of hash function */
|
|
|
|
#define HASH_IPX_NET(net) ((net) & (HASHIPXNETSIZE - 1))
|
|
|
|
typedef struct hashipxnet {
|
|
guint addr;
|
|
gchar name[MAXNAMELEN];
|
|
struct hashipxnet *next;
|
|
} hashipxnet_t;
|
|
|
|
/* hash tables used for ethernet and manufacturer lookup */
|
|
|
|
#define HASH_ETH_ADDRESS(addr) \
|
|
(((((addr)[2] << 8) | (addr)[3]) ^ (((addr)[4] << 8) | (addr)[5])) & \
|
|
(HASHETHSIZE - 1))
|
|
|
|
#define HASH_ETH_MANUF(addr) (((int)(addr)[2]) & (HASHMANUFSIZE - 1))
|
|
|
|
typedef struct hashmanuf {
|
|
guint8 addr[3];
|
|
char name[MAXMANUFLEN];
|
|
struct hashmanuf *next;
|
|
} hashmanuf_t;
|
|
|
|
typedef struct hashether {
|
|
guint8 addr[6];
|
|
char name[MAXNAMELEN];
|
|
gboolean is_dummy_entry; /* not a complete entry */
|
|
struct hashether *next;
|
|
} hashether_t;
|
|
|
|
/* internal ethernet type */
|
|
|
|
typedef struct _ether
|
|
{
|
|
guint8 addr[6];
|
|
char name[MAXNAMELEN];
|
|
} ether_t;
|
|
|
|
/* internal ipxnet type */
|
|
|
|
typedef struct _ipxnet
|
|
{
|
|
guint addr;
|
|
char name[MAXNAMELEN];
|
|
} ipxnet_t;
|
|
|
|
static hashipv4_t *ipv4_table[HASHHOSTSIZE];
|
|
static hashipv6_t *ipv6_table[HASHHOSTSIZE];
|
|
|
|
static hashport_t **cb_port_table;
|
|
static gchar *cb_service;
|
|
|
|
static hashport_t *udp_port_table[HASHPORTSIZE];
|
|
static hashport_t *tcp_port_table[HASHPORTSIZE];
|
|
static hashport_t *sctp_port_table[HASHPORTSIZE];
|
|
static hashport_t *dccp_port_table[HASHPORTSIZE];
|
|
static hashether_t *eth_table[HASHETHSIZE];
|
|
static hashmanuf_t *manuf_table[HASHMANUFSIZE];
|
|
static hashether_t *(*wka_table[48])[HASHETHSIZE];
|
|
static hashipxnet_t *ipxnet_table[HASHIPXNETSIZE];
|
|
|
|
static subnet_length_entry_t subnet_length_entries[SUBNETLENGTHSIZE]; /* Ordered array of entries */
|
|
static gboolean have_subnet_entry = FALSE;
|
|
|
|
static int eth_resolution_initialized = 0;
|
|
static int ipxnet_resolution_initialized = 0;
|
|
static int service_resolution_initialized = 0;
|
|
|
|
static hashether_t *add_eth_name(const guint8 *addr, const gchar *name);
|
|
static void add_serv_port_cb(guint32 port);
|
|
|
|
/*
|
|
* Flag controlling what names to resolve.
|
|
*/
|
|
guint32 g_resolv_flags;
|
|
|
|
/*
|
|
* Global variables (can be changed in GUI sections)
|
|
* XXX - they could be changed in GUI code, but there's currently no
|
|
* GUI code to change them.
|
|
*/
|
|
|
|
gchar *g_ethers_path = NULL; /* global ethers file */
|
|
gchar *g_pethers_path = NULL; /* personal ethers file */
|
|
gchar *g_ipxnets_path = NULL; /* global ipxnets file */
|
|
gchar *g_pipxnets_path = NULL; /* personal ipxnets file */
|
|
gchar *g_services_path = NULL; /* global services file */
|
|
gchar *g_pservices_path = NULL; /* personal services file */
|
|
/* first resolving call */
|
|
|
|
/* c-ares */
|
|
#ifdef HAVE_C_ARES
|
|
/*
|
|
* Submitted queries trigger a callback (c_ares_ghba_cb()).
|
|
* Queries are added to c_ares_queue_head. During processing, queries are
|
|
* popped off the front of c_ares_queue_head and submitted using
|
|
* ares_gethostbyaddr().
|
|
* The callback processes the response, then frees the request.
|
|
*/
|
|
|
|
static gboolean c_ares_initialized = FALSE;
|
|
ares_channel alchan;
|
|
int c_ares_in_flight = 0;
|
|
GList *c_ares_queue_head = NULL;
|
|
|
|
typedef struct _c_ares_queue_msg
|
|
{
|
|
union {
|
|
guint32 ip4;
|
|
struct e_in6_addr ip6;
|
|
} addr;
|
|
int family;
|
|
} c_ares_queue_msg_t;
|
|
|
|
static void c_ares_ghba_cb(void *arg, int status, int timeouts _U_, struct hostent *hostent);
|
|
|
|
#else
|
|
/* GNU ADNS */
|
|
#ifdef HAVE_GNU_ADNS
|
|
|
|
/*
|
|
* Submitted queries have to be checked individually using adns_check().
|
|
* Queries are added to adns_queue_head. During processing, the list is
|
|
* iterated twice: once to request queries up to the concurrency limit,
|
|
* and once to check the status of each query.
|
|
*/
|
|
|
|
static gboolean gnu_adns_initialized = FALSE;
|
|
adns_state ads;
|
|
int adns_in_flight = 0;
|
|
GList *adns_queue_head = NULL;
|
|
|
|
typedef struct _adns_queue_msg
|
|
{
|
|
gboolean submitted;
|
|
guint32 ip4_addr;
|
|
int type;
|
|
adns_query query;
|
|
} adns_queue_msg_t;
|
|
|
|
#endif /* HAVE_GNU_ADNS */
|
|
#endif /* HAVE_C_ARES */
|
|
|
|
typedef struct {
|
|
guint32 mask;
|
|
gsize mask_length;
|
|
const gchar* name; /* Shallow copy */
|
|
} subnet_entry_t;
|
|
|
|
/*
|
|
* Miscellaneous functions
|
|
*/
|
|
|
|
static int fgetline(char **buf, int *size, FILE *fp)
|
|
{
|
|
int len;
|
|
int c;
|
|
|
|
if (fp == NULL)
|
|
return -1;
|
|
|
|
if (*buf == NULL) {
|
|
if (*size == 0)
|
|
*size = BUFSIZ;
|
|
|
|
if ((*buf = g_malloc(*size)) == NULL)
|
|
return -1;
|
|
}
|
|
|
|
if (feof(fp))
|
|
return -1;
|
|
|
|
len = 0;
|
|
while ((c = getc(fp)) != EOF && c != '\r' && c != '\n') {
|
|
if (len+1 >= *size) {
|
|
if ((*buf = g_realloc(*buf, *size += BUFSIZ)) == NULL)
|
|
return -1;
|
|
}
|
|
(*buf)[len++] = c;
|
|
}
|
|
|
|
if (len == 0 && c == EOF)
|
|
return -1;
|
|
|
|
(*buf)[len] = '\0';
|
|
|
|
return len;
|
|
|
|
} /* fgetline */
|
|
|
|
|
|
/*
|
|
* Local function definitions
|
|
*/
|
|
static subnet_entry_t subnet_lookup(const guint32 addr);
|
|
static void subnet_entry_set(guint32 subnet_addr, guint32 mask_length, const gchar* name);
|
|
|
|
|
|
static void add_service_name(hashport_t **proto_table, guint port, const char *service_name)
|
|
{
|
|
int hash_idx;
|
|
hashport_t *tp;
|
|
|
|
|
|
hash_idx = HASH_PORT(port);
|
|
tp = proto_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = proto_table[hash_idx] = (hashport_t *)g_malloc(sizeof(hashport_t));
|
|
} else {
|
|
while(1) {
|
|
if( tp->port == port ) {
|
|
return;
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashport_t *)g_malloc(sizeof(hashport_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
/* fill in a new entry */
|
|
tp->port = port;
|
|
tp->next = NULL;
|
|
|
|
g_strlcpy(tp->name, service_name, MAXNAMELEN);
|
|
}
|
|
|
|
|
|
static void parse_service_line (char *line)
|
|
{
|
|
/*
|
|
* See the services(4) or services(5) man page for services file format
|
|
* (not available on all systems).
|
|
*/
|
|
|
|
gchar *cp;
|
|
gchar *service;
|
|
gchar *port;
|
|
|
|
range_t *port_rng = NULL;
|
|
guint32 max_port = MAX_UDP_PORT;
|
|
|
|
if ((cp = strchr(line, '#')))
|
|
*cp = '\0';
|
|
|
|
if ((cp = strtok(line, " \t")) == NULL)
|
|
return;
|
|
|
|
service = cp;
|
|
|
|
if ((cp = strtok(NULL, " \t")) == NULL)
|
|
return;
|
|
|
|
port = cp;
|
|
|
|
if ((cp = strtok(cp, "/")) == NULL)
|
|
return;
|
|
|
|
if ((cp = strtok(NULL, "/")) == NULL)
|
|
return;
|
|
|
|
/* seems we got all interesting things from the file */
|
|
if(strcmp(cp, "tcp") == 0) {
|
|
max_port = MAX_TCP_PORT;
|
|
cb_port_table = tcp_port_table;
|
|
}
|
|
else if(strcmp(cp, "udp") == 0) {
|
|
max_port = MAX_UDP_PORT;
|
|
cb_port_table = udp_port_table;
|
|
}
|
|
else if(strcmp(cp, "sctp") == 0) {
|
|
max_port = MAX_SCTP_PORT;
|
|
cb_port_table = sctp_port_table;
|
|
}
|
|
else if(strcmp(cp, "dccp") == 0) {
|
|
max_port = MAX_DCCP_PORT;
|
|
cb_port_table = dccp_port_table;
|
|
} else {
|
|
return;
|
|
}
|
|
|
|
if(CVT_NO_ERROR != range_convert_str(&port_rng, port, max_port) ) {
|
|
/* some assertion here? */
|
|
return;
|
|
}
|
|
|
|
cb_service = service;
|
|
range_foreach(port_rng, add_serv_port_cb);
|
|
g_free (port_rng);
|
|
} /* parse_service_line */
|
|
|
|
|
|
static void
|
|
add_serv_port_cb(guint32 port)
|
|
{
|
|
if ( port ) {
|
|
add_service_name(cb_port_table, port, cb_service);
|
|
}
|
|
}
|
|
|
|
|
|
static void parse_services_file(const char * path)
|
|
{
|
|
FILE *serv_p;
|
|
static int size = 0;
|
|
static char *buf = NULL;
|
|
|
|
/* services hash table initialization */
|
|
serv_p = ws_fopen(path, "r");
|
|
|
|
if (serv_p == NULL)
|
|
return;
|
|
|
|
while (fgetline(&buf, &size, serv_p) >= 0) {
|
|
parse_service_line (buf);
|
|
}
|
|
|
|
fclose(serv_p);
|
|
}
|
|
|
|
|
|
static void initialize_services(void)
|
|
{
|
|
|
|
/* the hash table won't ignore duplicates, so use the personal path first */
|
|
|
|
/* set personal services path */
|
|
if (g_pservices_path == NULL)
|
|
g_pservices_path = get_persconffile_path(ENAME_SERVICES, FALSE, FALSE);
|
|
|
|
parse_services_file(g_pservices_path);
|
|
|
|
/* Compute the pathname of the services file. */
|
|
if (g_services_path == NULL) {
|
|
g_services_path = get_datafile_path(ENAME_SERVICES);
|
|
}
|
|
|
|
parse_services_file(g_services_path);
|
|
|
|
} /* initialize_services */
|
|
|
|
|
|
|
|
static gchar *serv_name_lookup(guint port, port_type proto)
|
|
{
|
|
int hash_idx;
|
|
hashport_t *tp;
|
|
hashport_t **table;
|
|
const char *serv_proto = NULL;
|
|
struct servent *servp;
|
|
|
|
|
|
if (!service_resolution_initialized) {
|
|
initialize_services();
|
|
service_resolution_initialized = 1;
|
|
}
|
|
|
|
switch(proto) {
|
|
case PT_UDP:
|
|
table = udp_port_table;
|
|
serv_proto = "udp";
|
|
break;
|
|
case PT_TCP:
|
|
table = tcp_port_table;
|
|
serv_proto = "tcp";
|
|
break;
|
|
case PT_SCTP:
|
|
table = sctp_port_table;
|
|
serv_proto = "sctp";
|
|
break;
|
|
case PT_DCCP:
|
|
table = dccp_port_table;
|
|
serv_proto = "dcp";
|
|
break;
|
|
default:
|
|
/* not yet implemented */
|
|
return NULL;
|
|
/*NOTREACHED*/
|
|
} /* proto */
|
|
|
|
hash_idx = HASH_PORT(port);
|
|
tp = table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = table[hash_idx] = (hashport_t *)g_malloc(sizeof(hashport_t));
|
|
} else {
|
|
while(1) {
|
|
if( tp->port == port ) {
|
|
return tp->name;
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashport_t *)g_malloc(sizeof(hashport_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
/* fill in a new entry */
|
|
tp->port = port;
|
|
tp->next = NULL;
|
|
|
|
if (!(g_resolv_flags & RESOLV_TRANSPORT) ||
|
|
(servp = getservbyport(g_htons(port), serv_proto)) == NULL) {
|
|
/* unknown port */
|
|
g_snprintf(tp->name, MAXNAMELEN, "%d", port);
|
|
} else {
|
|
g_strlcpy(tp->name, servp->s_name, MAXNAMELEN);
|
|
}
|
|
|
|
return (tp->name);
|
|
|
|
} /* serv_name_lookup */
|
|
|
|
|
|
#ifdef AVOID_DNS_TIMEOUT
|
|
|
|
#define DNS_TIMEOUT 2 /* max sec per call */
|
|
|
|
jmp_buf hostname_env;
|
|
|
|
static void abort_network_query(int sig _U_)
|
|
{
|
|
longjmp(hostname_env, 1);
|
|
}
|
|
#endif /* AVOID_DNS_TIMEOUT */
|
|
|
|
/* Fill in an IP4 structure with info from subnets file or just with the
|
|
* string form of the address.
|
|
*/
|
|
static void fill_dummy_ip4(guint addr, hashipv4_t* volatile tp)
|
|
{
|
|
subnet_entry_t subnet_entry;
|
|
tp->is_dummy_entry = TRUE; /* Overwrite if we get async DNS reply */
|
|
|
|
/* Do we have a subnet for this address? */
|
|
subnet_entry = subnet_lookup(addr);
|
|
if(0 != subnet_entry.mask) {
|
|
/* Print name, then '.' then IP address after subnet mask */
|
|
guint32 host_addr;
|
|
gchar buffer[MAX_IP_STR_LEN];
|
|
gchar* paddr;
|
|
gsize i;
|
|
|
|
host_addr = addr & (~(guint32)subnet_entry.mask);
|
|
ip_to_str_buf((guint8 *)&host_addr, buffer, MAX_IP_STR_LEN);
|
|
paddr = buffer;
|
|
|
|
/* Skip to first octet that is not totally masked
|
|
* If length of mask is 32, we chomp the whole address.
|
|
* If the address string starts '.' (should not happen?),
|
|
* we skip that '.'.
|
|
*/
|
|
i = subnet_entry.mask_length / 8;
|
|
while(*(paddr) != '\0' && i > 0) {
|
|
if(*(++paddr) == '.') {
|
|
--i;
|
|
}
|
|
}
|
|
|
|
/* There are more efficient ways to do this, but this is safe if we
|
|
* trust g_snprintf and MAXNAMELEN
|
|
*/
|
|
g_snprintf(tp->name, MAXNAMELEN, "%s%s", subnet_entry.name, paddr);
|
|
} else {
|
|
ip_to_str_buf((guint8 *)&addr, tp->name, MAXNAMELEN);
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_C_ARES
|
|
|
|
static void
|
|
c_ares_ghba_cb(void *arg, int status, int timeouts _U_, struct hostent *he) {
|
|
c_ares_queue_msg_t *caqm = arg;
|
|
char **p;
|
|
char name[MAXNAMELEN];
|
|
|
|
if (!caqm) return;
|
|
c_ares_in_flight--;
|
|
|
|
if (status == ARES_SUCCESS) {
|
|
for (p = he->h_addr_list; *p != NULL; p++) {
|
|
inet_ntop(he->h_addrtype, *p, name, sizeof(name));
|
|
switch(caqm->family) {
|
|
case AF_INET:
|
|
add_ipv4_name(caqm->addr.ip4, name);
|
|
break;
|
|
case AF_INET6:
|
|
add_ipv6_name(&caqm->addr.ip6, name);
|
|
break;
|
|
default:
|
|
/* Throw an exception? */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
g_free(caqm);
|
|
}
|
|
#endif /* HAVE_C_ARES */
|
|
|
|
static gchar *host_name_lookup(guint addr, gboolean *found)
|
|
{
|
|
int hash_idx;
|
|
hashipv4_t * volatile tp;
|
|
struct hostent *hostp;
|
|
#ifdef HAVE_C_ARES
|
|
c_ares_queue_msg_t *caqm;
|
|
#else
|
|
#ifdef HAVE_GNU_ADNS
|
|
adns_queue_msg_t *qmsg;
|
|
#endif /* HAVE_GNU_ADNS */
|
|
#endif /* HAVE_C_ARES */
|
|
|
|
*found = TRUE;
|
|
|
|
hash_idx = HASH_IPV4_ADDRESS(addr);
|
|
|
|
tp = ipv4_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = ipv4_table[hash_idx] = (hashipv4_t *)g_malloc(sizeof(hashipv4_t));
|
|
} else {
|
|
while(1) {
|
|
if( tp->addr == addr ) {
|
|
if (tp->is_dummy_entry)
|
|
*found = FALSE;
|
|
return tp->name;
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashipv4_t *)g_malloc(sizeof(hashipv4_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
/* fill in a new entry */
|
|
tp->addr = addr;
|
|
tp->next = NULL;
|
|
|
|
#ifdef HAVE_C_ARES
|
|
if ((g_resolv_flags & RESOLV_CONCURRENT) &&
|
|
prefs.name_resolve_concurrency > 0 &&
|
|
c_ares_initialized) {
|
|
caqm = g_malloc(sizeof(c_ares_queue_msg_t));
|
|
caqm->family = AF_INET;
|
|
caqm->addr.ip4 = addr;
|
|
c_ares_queue_head = g_list_append(c_ares_queue_head, (gpointer) caqm);
|
|
|
|
/* XXX found is set to TRUE, which seems a bit odd, but I'm not
|
|
* going to risk changing the semantics.
|
|
*/
|
|
fill_dummy_ip4(addr, tp);
|
|
return tp->name;
|
|
}
|
|
#else
|
|
#ifdef HAVE_GNU_ADNS
|
|
if ((g_resolv_flags & RESOLV_CONCURRENT) &&
|
|
prefs.name_resolve_concurrency > 0 &&
|
|
gnu_adns_initialized) {
|
|
qmsg = g_malloc(sizeof(adns_queue_msg_t));
|
|
qmsg->type = AF_INET;
|
|
qmsg->ip4_addr = addr;
|
|
qmsg->submitted = FALSE;
|
|
adns_queue_head = g_list_append(adns_queue_head, (gpointer) qmsg);
|
|
|
|
/* XXX found is set to TRUE, which seems a bit odd, but I'm not
|
|
* going to risk changing the semantics.
|
|
*/
|
|
fill_dummy_ip4(addr, tp);
|
|
return tp->name;
|
|
}
|
|
#endif /* HAVE_GNU_ADNS */
|
|
#endif /* HAVE_C_ARES */
|
|
|
|
/*
|
|
* The Windows "gethostbyaddr()" insists on translating 0.0.0.0 to
|
|
* the name of the host on which it's running; to work around that
|
|
* botch, we don't try to translate an all-zero IP address to a host
|
|
* name.
|
|
*/
|
|
if (addr != 0 && (g_resolv_flags & RESOLV_NETWORK)) {
|
|
/* Use async DNS if possible, else fall back to timeouts,
|
|
* else call gethostbyaddr and hope for the best
|
|
*/
|
|
|
|
# ifdef AVOID_DNS_TIMEOUT
|
|
|
|
/* Quick hack to avoid DNS/YP timeout */
|
|
|
|
if (!setjmp(hostname_env)) {
|
|
signal(SIGALRM, abort_network_query);
|
|
alarm(DNS_TIMEOUT);
|
|
# endif /* AVOID_DNS_TIMEOUT */
|
|
|
|
hostp = gethostbyaddr((char *)&addr, 4, AF_INET);
|
|
|
|
# ifdef AVOID_DNS_TIMEOUT
|
|
alarm(0);
|
|
# endif /* AVOID_DNS_TIMEOUT */
|
|
|
|
if (hostp != NULL) {
|
|
g_strlcpy(tp->name, hostp->h_name, MAXNAMELEN);
|
|
tp->is_dummy_entry = FALSE;
|
|
return tp->name;
|
|
}
|
|
|
|
# ifdef AVOID_DNS_TIMEOUT
|
|
}
|
|
# endif /* AVOID_DNS_TIMEOUT */
|
|
|
|
}
|
|
|
|
/* unknown host or DNS timeout */
|
|
*found = FALSE;
|
|
|
|
fill_dummy_ip4(addr, tp);
|
|
return (tp->name);
|
|
|
|
} /* host_name_lookup */
|
|
|
|
static gchar *host_name_lookup6(struct e_in6_addr *addr, gboolean *found)
|
|
{
|
|
int hash_idx;
|
|
hashipv6_t * volatile tp;
|
|
#ifdef HAVE_C_ARES
|
|
c_ares_queue_msg_t *caqm;
|
|
#endif /* HAVE_C_ARES */
|
|
#ifdef INET6
|
|
struct hostent *hostp;
|
|
#endif
|
|
|
|
*found = TRUE;
|
|
|
|
hash_idx = HASH_IPV6_ADDRESS(*addr);
|
|
|
|
tp = ipv6_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = ipv6_table[hash_idx] = (hashipv6_t *)g_malloc(sizeof(hashipv6_t));
|
|
} else {
|
|
while(1) {
|
|
if( memcmp(&tp->addr, addr, sizeof (struct e_in6_addr)) == 0 ) {
|
|
if (tp->is_dummy_entry)
|
|
*found = FALSE;
|
|
return tp->name;
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashipv6_t *)g_malloc(sizeof(hashipv6_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
/* fill in a new entry */
|
|
tp->addr = *addr;
|
|
tp->next = NULL;
|
|
|
|
#ifdef HAVE_C_ARES
|
|
if ((g_resolv_flags & RESOLV_CONCURRENT) &&
|
|
prefs.name_resolve_concurrency > 0 &&
|
|
c_ares_initialized) {
|
|
caqm = g_malloc(sizeof(c_ares_queue_msg_t));
|
|
caqm->family = AF_INET6;
|
|
memcpy(&caqm->addr.ip6, addr, sizeof(caqm->addr.ip6));
|
|
c_ares_queue_head = g_list_append(c_ares_queue_head, (gpointer) caqm);
|
|
|
|
/* XXX found is set to TRUE, which seems a bit odd, but I'm not
|
|
* going to risk changing the semantics.
|
|
*/
|
|
ip6_to_str_buf(addr, tp->name);
|
|
tp->is_dummy_entry = TRUE;
|
|
return tp->name;
|
|
}
|
|
#endif /* HAVE_C_ARES */
|
|
|
|
#ifdef INET6
|
|
if (g_resolv_flags & RESOLV_NETWORK) {
|
|
#ifdef AVOID_DNS_TIMEOUT
|
|
|
|
/* Quick hack to avoid DNS/YP timeout */
|
|
|
|
if (!setjmp(hostname_env)) {
|
|
signal(SIGALRM, abort_network_query);
|
|
alarm(DNS_TIMEOUT);
|
|
#endif /* AVOID_DNS_TIMEOUT */
|
|
hostp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET6);
|
|
#ifdef AVOID_DNS_TIMEOUT
|
|
alarm(0);
|
|
# endif /* AVOID_DNS_TIMEOUT */
|
|
|
|
if (hostp != NULL) {
|
|
g_strlcpy(tp->name, hostp->h_name, MAXNAMELEN);
|
|
tp->is_dummy_entry = FALSE;
|
|
return tp->name;
|
|
}
|
|
|
|
#ifdef AVOID_DNS_TIMEOUT
|
|
}
|
|
# endif /* AVOID_DNS_TIMEOUT */
|
|
|
|
}
|
|
|
|
/* unknown host or DNS timeout */
|
|
#endif /* INET6 */
|
|
ip6_to_str_buf(addr, tp->name);
|
|
tp->is_dummy_entry = TRUE;
|
|
*found = FALSE;
|
|
return (tp->name);
|
|
|
|
} /* host_name_lookup6 */
|
|
|
|
static const gchar *solve_address_to_name(address *addr)
|
|
{
|
|
guint32 ipv4_addr;
|
|
struct e_in6_addr ipv6_addr;
|
|
|
|
switch (addr->type) {
|
|
|
|
case AT_ETHER:
|
|
return get_ether_name(addr->data);
|
|
|
|
case AT_IPv4:
|
|
memcpy(&ipv4_addr, addr->data, sizeof ipv4_addr);
|
|
return get_hostname(ipv4_addr);
|
|
|
|
case AT_IPv6:
|
|
memcpy(&ipv6_addr.bytes, addr->data, sizeof ipv6_addr.bytes);
|
|
return get_hostname6(&ipv6_addr);
|
|
|
|
case AT_STRINGZ:
|
|
return addr->data;
|
|
|
|
default:
|
|
return NULL;
|
|
}
|
|
} /* solve_address_to_name */
|
|
|
|
|
|
/*
|
|
* Ethernet / manufacturer resolution
|
|
*
|
|
* The following functions implement ethernet address resolution and
|
|
* ethers files parsing (see ethers(4)).
|
|
*
|
|
* The manuf file has the same format as ethers(4) except that names are
|
|
* truncated to MAXMANUFLEN-1 characters and that an address contains
|
|
* only 3 bytes (instead of 6).
|
|
*
|
|
* Notes:
|
|
*
|
|
* I decide to not use the existing functions (see ethers(3) on some
|
|
* operating systems) for the following reasons:
|
|
* - performance gains (use of hash tables and some other enhancements),
|
|
* - use of two ethers files (system-wide and per user),
|
|
* - avoid the use of NIS maps,
|
|
* - lack of these functions on some systems.
|
|
*
|
|
* So the following functions do _not_ behave as the standard ones.
|
|
*
|
|
* -- Laurent.
|
|
*/
|
|
|
|
|
|
/*
|
|
* If "manuf_file" is FALSE, parse a 6-byte MAC address.
|
|
* If "manuf_file" is TRUE, parse an up-to-6-byte sequence with an optional
|
|
* mask.
|
|
*/
|
|
static gboolean
|
|
parse_ether_address(const char *cp, ether_t *eth, unsigned int *mask,
|
|
gboolean manuf_file)
|
|
{
|
|
int i;
|
|
unsigned long num;
|
|
char *p;
|
|
char sep = '\0';
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
/* Get a hex number, 1 or 2 digits, no sign characters allowed. */
|
|
if (!isxdigit((unsigned char)*cp))
|
|
return FALSE;
|
|
num = strtoul(cp, &p, 16);
|
|
if (p == cp)
|
|
return FALSE; /* failed */
|
|
if (num > 0xFF)
|
|
return FALSE; /* not a valid octet */
|
|
eth->addr[i] = (guint8) num;
|
|
cp = p; /* skip past the number */
|
|
|
|
/* OK, what character terminated the octet? */
|
|
if (*cp == '/') {
|
|
/* "/" - this has a mask. */
|
|
if (!manuf_file) {
|
|
/* Entries with masks are allowed only in the "manuf" files. */
|
|
return FALSE;
|
|
}
|
|
cp++; /* skip past the '/' to get to the mask */
|
|
if (!isdigit((unsigned char)*cp))
|
|
return FALSE; /* no sign allowed */
|
|
num = strtoul(cp, &p, 10);
|
|
if (p == cp)
|
|
return FALSE; /* failed */
|
|
cp = p; /* skip past the number */
|
|
if (*cp != '\0' && !isspace((unsigned char)*cp))
|
|
return FALSE; /* bogus terminator */
|
|
if (num == 0 || num >= 48)
|
|
return FALSE; /* bogus mask */
|
|
/* Mask out the bits not covered by the mask */
|
|
*mask = num;
|
|
for (i = 0; num >= 8; i++, num -= 8)
|
|
; /* skip octets entirely covered by the mask */
|
|
/* 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 the ethers(4) or ethers(5) man page for ethers file format
|
|
* (not available on all systems).
|
|
* We allow both ethernet address separators (':' and '-'),
|
|
* as well as Wireshark's '.' separator.
|
|
*/
|
|
|
|
gchar *cp;
|
|
|
|
if ((cp = strchr(line, '#')))
|
|
*cp = '\0';
|
|
|
|
if ((cp = strtok(line, " \t")) == NULL)
|
|
return -1;
|
|
|
|
if (!parse_ether_address(cp, eth, mask, manuf_file))
|
|
return -1;
|
|
|
|
if ((cp = strtok(NULL, " \t")) == NULL)
|
|
return -1;
|
|
|
|
g_strlcpy(eth->name, cp, MAXNAMELEN);
|
|
|
|
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 = ws_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 gchar *name)
|
|
{
|
|
ether_t *eth;
|
|
|
|
set_ethent(g_pethers_path);
|
|
|
|
while ((eth = get_ethent(NULL, FALSE)) && strncmp(name, eth->name, MAXNAMELEN) != 0)
|
|
;
|
|
|
|
if (eth == NULL) {
|
|
end_ethent();
|
|
|
|
set_ethent(g_ethers_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_pethers_path);
|
|
|
|
while ((eth = get_ethent(NULL, FALSE)) && memcmp(addr, eth->addr, 6) != 0)
|
|
;
|
|
|
|
if (eth == NULL) {
|
|
end_ethent();
|
|
|
|
set_ethent(g_ethers_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, gchar *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));
|
|
g_strlcpy(tp->name, name, MAXMANUFLEN);
|
|
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));
|
|
g_strlcpy(etp->name, name, MAXNAMELEN);
|
|
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;
|
|
guint8 stripped_addr[3];
|
|
|
|
hash_idx = HASH_ETH_MANUF(addr);
|
|
|
|
/* first try to find a "perfect match" */
|
|
tp = manuf_table[hash_idx];
|
|
while(tp != NULL) {
|
|
if (memcmp(tp->addr, addr, sizeof(tp->addr)) == 0) {
|
|
return tp;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
|
|
/* Mask out the broadcast/multicast flag but not the locally
|
|
* administered flag as localy administered means: not assigend
|
|
* by the IEEE but the local administrator instead.
|
|
* 0x01 multicast / broadcast bit
|
|
* 0x02 locally administered bit */
|
|
memcpy(stripped_addr, addr, 3);
|
|
stripped_addr[0] &= 0xFE;
|
|
|
|
tp = manuf_table[hash_idx];
|
|
while(tp != NULL) {
|
|
if (memcmp(tp->addr, stripped_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_strdup_printf("%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, 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 gchar *name)
|
|
{
|
|
int hash_idx;
|
|
hashether_t *tp;
|
|
int new_one = TRUE;
|
|
|
|
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 */
|
|
new_one = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashether_t *)g_malloc(sizeof(hashether_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
g_strlcpy(tp->name, name, MAXNAMELEN);
|
|
if (new_one) {
|
|
memcpy(tp->addr, addr, sizeof(tp->addr));
|
|
tp->next = NULL;
|
|
}
|
|
tp->is_dummy_entry = FALSE;
|
|
|
|
return tp;
|
|
|
|
} /* add_eth_name */
|
|
|
|
static gchar *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) {
|
|
g_snprintf(tp->name, MAXNAMELEN, "%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) {
|
|
g_snprintf(tp->name, MAXNAMELEN, "%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) {
|
|
g_snprintf(tp->name, MAXNAMELEN, "%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) {
|
|
g_snprintf(tp->name, MAXNAMELEN, "%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) {
|
|
g_snprintf(tp->name, MAXNAMELEN, "%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) {
|
|
g_snprintf(tp->name, MAXNAMELEN, "%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) {
|
|
g_snprintf(tp->name, MAXNAMELEN, "%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. */
|
|
g_snprintf(tp->name, MAXNAMELEN, "%s", ether_to_str(addr));
|
|
tp->is_dummy_entry = TRUE;
|
|
|
|
} else {
|
|
g_strlcpy(tp->name, eth->name, MAXNAMELEN);
|
|
tp->is_dummy_entry = FALSE;
|
|
}
|
|
|
|
return (tp->name);
|
|
|
|
} /* eth_name_lookup */
|
|
|
|
static guint8 *eth_addr_lookup(const gchar *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;
|
|
}
|
|
|
|
g_strlcpy(ipxnet->name, cp, MAXNAMELEN);
|
|
|
|
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 = ws_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 gchar *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_strdup_printf("%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, FALSE);
|
|
|
|
} /* initialize_ipxnets */
|
|
|
|
static hashipxnet_t *add_ipxnet_name(guint addr, const gchar *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;
|
|
g_strlcpy(tp->name, name, MAXNAMELEN);
|
|
tp->next = NULL;
|
|
|
|
return tp;
|
|
|
|
} /* add_ipxnet_name */
|
|
|
|
static gchar *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 */
|
|
g_snprintf(tp->name, MAXNAMELEN, "%X", addr);
|
|
|
|
} else {
|
|
g_strlcpy(tp->name, ipxnet->name, MAXNAMELEN);
|
|
}
|
|
|
|
return (tp->name);
|
|
|
|
} /* ipxnet_name_lookup */
|
|
|
|
static guint ipxnet_addr_lookup(const gchar *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) {
|
|
*success = TRUE;
|
|
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 */
|
|
|
|
static gboolean
|
|
read_hosts_file (const char *hostspath)
|
|
{
|
|
FILE *hf;
|
|
char *line = NULL;
|
|
int size = 0;
|
|
gchar *cp;
|
|
guint32 host_addr[4]; /* IPv4 or IPv6 */
|
|
struct e_in6_addr ipv6_addr;
|
|
gboolean is_ipv6;
|
|
int ret;
|
|
|
|
/*
|
|
* See the hosts(4) or hosts(5) man page for hosts file format
|
|
* (not available on all systems).
|
|
*/
|
|
if ((hf = ws_fopen(hostspath, "r")) == NULL)
|
|
return FALSE;
|
|
|
|
while (fgetline(&line, &size, hf) >= 0) {
|
|
if ((cp = strchr(line, '#')))
|
|
*cp = '\0';
|
|
|
|
if ((cp = strtok(line, " \t")) == NULL)
|
|
continue; /* no tokens in the line */
|
|
|
|
ret = inet_pton(AF_INET6, cp, &host_addr);
|
|
if (ret == -1)
|
|
continue; /* error parsing */
|
|
if (ret == 1) {
|
|
/* Valid IPv6 */
|
|
is_ipv6 = TRUE;
|
|
} else {
|
|
/* Not valid IPv6 - valid IPv4? */
|
|
if (inet_pton(AF_INET, cp, &host_addr) != 1)
|
|
continue; /* no */
|
|
is_ipv6 = FALSE;
|
|
}
|
|
|
|
if ((cp = strtok(NULL, " \t")) == NULL)
|
|
continue; /* no host name */
|
|
|
|
if (is_ipv6) {
|
|
memcpy(&ipv6_addr, host_addr, sizeof ipv6_addr);
|
|
add_ipv6_name(&ipv6_addr, cp);
|
|
} else
|
|
add_ipv4_name(host_addr[0], cp);
|
|
|
|
/*
|
|
* Add the aliases, too, if there are any.
|
|
*/
|
|
while ((cp = strtok(NULL, " \t")) != NULL) {
|
|
if (is_ipv6) {
|
|
memcpy(&ipv6_addr, host_addr, sizeof ipv6_addr);
|
|
add_ipv6_name(&ipv6_addr, cp);
|
|
} else
|
|
add_ipv4_name(host_addr[0], cp);
|
|
}
|
|
}
|
|
if (line != NULL)
|
|
g_free(line);
|
|
|
|
fclose(hf);
|
|
return TRUE;
|
|
} /* read_hosts_file */
|
|
|
|
|
|
/* Read in a list of subnet definition - name pairs.
|
|
* <line> = <comment> | <entry> | <whitespace>
|
|
* <comment> = <whitespace>#<any>
|
|
* <entry> = <subnet_definition> <whitespace> <subnet_name> [<comment>|<whitespace><any>]
|
|
* <subnet_definition> = <ipv4_address> / <subnet_mask_length>
|
|
* <ipv4_address> is a full address; it will be masked to get the subnet-ID.
|
|
* <subnet_mask_length> is a decimal 1-31
|
|
* <subnet_name> is a string containing no whitespace.
|
|
* <whitespace> = (space | tab)+
|
|
* Any malformed entries are ignored.
|
|
* Any trailing data after the subnet_name is ignored.
|
|
*
|
|
* XXX Support IPv6
|
|
*/
|
|
static gboolean
|
|
read_subnets_file (const char *subnetspath)
|
|
{
|
|
FILE *hf;
|
|
char *line = NULL;
|
|
int size = 0;
|
|
gchar *cp, *cp2;
|
|
guint32 host_addr; /* IPv4 ONLY */
|
|
int mask_length;
|
|
|
|
if ((hf = ws_fopen(subnetspath, "r")) == NULL)
|
|
return FALSE;
|
|
|
|
while (fgetline(&line, &size, hf) >= 0) {
|
|
if ((cp = strchr(line, '#')))
|
|
*cp = '\0';
|
|
|
|
if ((cp = strtok(line, " \t")) == NULL)
|
|
continue; /* no tokens in the line */
|
|
|
|
|
|
/* Expected format is <IP4 address>/<subnet length> */
|
|
cp2 = strchr(cp, '/');
|
|
if(NULL == cp2) {
|
|
/* No length */
|
|
continue;
|
|
}
|
|
*cp2 = '\0'; /* Cut token */
|
|
++cp2 ;
|
|
|
|
/* Check if this is a valid IPv4 address */
|
|
if (inet_pton(AF_INET, cp, &host_addr) != 1) {
|
|
continue; /* no */
|
|
}
|
|
|
|
mask_length = atoi(cp2);
|
|
if(0 >= mask_length || mask_length > 31) {
|
|
continue; /* invalid mask length */
|
|
}
|
|
|
|
if ((cp = strtok(NULL, " \t")) == NULL)
|
|
continue; /* no subnet name */
|
|
|
|
subnet_entry_set(host_addr, (guint32)mask_length, cp);
|
|
}
|
|
if (line != NULL)
|
|
g_free(line);
|
|
|
|
fclose(hf);
|
|
return TRUE;
|
|
} /* read_subnets_file */
|
|
|
|
static subnet_entry_t subnet_lookup(const guint32 addr)
|
|
{
|
|
subnet_entry_t subnet_entry;
|
|
guint32 i;
|
|
|
|
/* Search mask lengths linearly, longest first */
|
|
|
|
i = SUBNETLENGTHSIZE;
|
|
while(have_subnet_entry && i > 0) {
|
|
guint32 masked_addr;
|
|
subnet_length_entry_t* length_entry;
|
|
|
|
/* Note that we run from 31 (length 32) to 0 (length 1) */
|
|
--i;
|
|
g_assert(i < SUBNETLENGTHSIZE);
|
|
|
|
|
|
length_entry = &subnet_length_entries[i];
|
|
|
|
if(NULL != length_entry->subnet_addresses) {
|
|
hashipv4_t * tp;
|
|
guint32 hash_idx;
|
|
|
|
masked_addr = addr & length_entry->mask;
|
|
hash_idx = HASH_IPV4_ADDRESS(masked_addr);
|
|
|
|
tp = length_entry->subnet_addresses[hash_idx];
|
|
while(tp != NULL && tp->addr != masked_addr) {
|
|
tp = tp->next;
|
|
}
|
|
|
|
if(NULL != tp) {
|
|
subnet_entry.mask = length_entry->mask;
|
|
subnet_entry.mask_length = i + 1; /* Length is offset + 1 */
|
|
subnet_entry.name = tp->name;
|
|
return subnet_entry;
|
|
}
|
|
}
|
|
}
|
|
|
|
subnet_entry.mask = 0;
|
|
subnet_entry.mask_length = 0;
|
|
subnet_entry.name = NULL;
|
|
|
|
return subnet_entry;
|
|
}
|
|
|
|
/* Add a subnet-definition - name pair to the set.
|
|
* The definition is taken by masking the address passed in with the mask of the
|
|
* given length.
|
|
*/
|
|
static void subnet_entry_set(guint32 subnet_addr, guint32 mask_length, const gchar* name)
|
|
{
|
|
subnet_length_entry_t* entry;
|
|
hashipv4_t * tp;
|
|
gsize hash_idx;
|
|
|
|
g_assert(mask_length > 0 && mask_length <= 32);
|
|
|
|
entry = &subnet_length_entries[mask_length - 1];
|
|
|
|
subnet_addr &= entry->mask;
|
|
|
|
hash_idx = HASH_IPV4_ADDRESS(subnet_addr);
|
|
|
|
if(NULL == entry->subnet_addresses) {
|
|
entry->subnet_addresses = g_new0(hashipv4_t*,HASHHOSTSIZE);
|
|
}
|
|
|
|
if(NULL != (tp = entry->subnet_addresses[hash_idx])) {
|
|
if(tp->addr == subnet_addr) {
|
|
return; /* XXX provide warning that an address was repeated? */
|
|
} else {
|
|
hashipv4_t * new_tp = g_new(hashipv4_t,1);
|
|
tp->next = new_tp;
|
|
tp = new_tp;
|
|
}
|
|
} else {
|
|
tp = entry->subnet_addresses[hash_idx] = g_new(hashipv4_t,1);
|
|
}
|
|
|
|
tp->next = NULL;
|
|
tp->addr = subnet_addr;
|
|
tp->is_dummy_entry = FALSE; /*Never used again...*/
|
|
g_strlcpy(tp->name, name, MAXNAMELEN); /* This is longer than subnet names can actually be */
|
|
have_subnet_entry = TRUE;
|
|
}
|
|
|
|
static guint32 get_subnet_mask(guint32 mask_length) {
|
|
|
|
static guint32 masks[SUBNETLENGTHSIZE];
|
|
static gboolean initialised = FALSE;
|
|
|
|
if(!initialised) {
|
|
memset(masks, 0, sizeof(masks));
|
|
|
|
initialised = TRUE;
|
|
|
|
/* XXX There must be a better way to do this than
|
|
* hand-coding the values, but I can't seem to
|
|
* come up with one!
|
|
*/
|
|
|
|
inet_pton(AF_INET, "128.0.0.0", &masks[0]);
|
|
inet_pton(AF_INET, "192.0.0.0", &masks[1]);
|
|
inet_pton(AF_INET, "224.0.0.0", &masks[2]);
|
|
inet_pton(AF_INET, "240.0.0.0", &masks[3]);
|
|
inet_pton(AF_INET, "248.0.0.0", &masks[4]);
|
|
inet_pton(AF_INET, "252.0.0.0", &masks[5]);
|
|
inet_pton(AF_INET, "254.0.0.0", &masks[6]);
|
|
inet_pton(AF_INET, "255.0.0.0", &masks[7]);
|
|
|
|
inet_pton(AF_INET, "255.128.0.0", &masks[8]);
|
|
inet_pton(AF_INET, "255.192.0.0", &masks[9]);
|
|
inet_pton(AF_INET, "255.224.0.0", &masks[10]);
|
|
inet_pton(AF_INET, "255.240.0.0", &masks[11]);
|
|
inet_pton(AF_INET, "255.248.0.0", &masks[12]);
|
|
inet_pton(AF_INET, "255.252.0.0", &masks[13]);
|
|
inet_pton(AF_INET, "255.254.0.0", &masks[14]);
|
|
inet_pton(AF_INET, "255.255.0.0", &masks[15]);
|
|
|
|
inet_pton(AF_INET, "255.255.128.0", &masks[16]);
|
|
inet_pton(AF_INET, "255.255.192.0", &masks[17]);
|
|
inet_pton(AF_INET, "255.255.224.0", &masks[18]);
|
|
inet_pton(AF_INET, "255.255.240.0", &masks[19]);
|
|
inet_pton(AF_INET, "255.255.248.0", &masks[20]);
|
|
inet_pton(AF_INET, "255.255.252.0", &masks[21]);
|
|
inet_pton(AF_INET, "255.255.254.0", &masks[22]);
|
|
inet_pton(AF_INET, "255.255.255.0", &masks[23]);
|
|
|
|
inet_pton(AF_INET, "255.255.255.128", &masks[24]);
|
|
inet_pton(AF_INET, "255.255.255.192", &masks[25]);
|
|
inet_pton(AF_INET, "255.255.255.224", &masks[26]);
|
|
inet_pton(AF_INET, "255.255.255.240", &masks[27]);
|
|
inet_pton(AF_INET, "255.255.255.248", &masks[28]);
|
|
inet_pton(AF_INET, "255.255.255.252", &masks[29]);
|
|
inet_pton(AF_INET, "255.255.255.254", &masks[30]);
|
|
inet_pton(AF_INET, "255.255.255.255", &masks[31]);
|
|
}
|
|
|
|
if(mask_length == 0 || mask_length > SUBNETLENGTHSIZE) {
|
|
g_assert_not_reached();
|
|
return 0;
|
|
} else {
|
|
return masks[mask_length - 1];
|
|
}
|
|
}
|
|
|
|
static void subnet_name_lookup_init(void)
|
|
{
|
|
gchar* subnetspath;
|
|
|
|
guint32 i;
|
|
for(i = 0; i < SUBNETLENGTHSIZE; ++i) {
|
|
guint32 length = i + 1;
|
|
|
|
subnet_length_entries[i].subnet_addresses = NULL;
|
|
subnet_length_entries[i].mask_length = length;
|
|
subnet_length_entries[i].mask = get_subnet_mask(length);
|
|
}
|
|
|
|
subnetspath = get_persconffile_path(ENAME_SUBNETS, FALSE, FALSE);
|
|
if (!read_subnets_file(subnetspath) && errno != ENOENT) {
|
|
report_open_failure(subnetspath, errno, FALSE);
|
|
}
|
|
g_free(subnetspath);
|
|
|
|
/*
|
|
* Load the global subnets file, if we have one.
|
|
*/
|
|
subnetspath = get_datafile_path(ENAME_SUBNETS);
|
|
if (!read_subnets_file(subnetspath) && errno != ENOENT) {
|
|
report_open_failure(subnetspath, errno, FALSE);
|
|
}
|
|
g_free(subnetspath);
|
|
}
|
|
|
|
/*
|
|
* External Functions
|
|
*/
|
|
|
|
void
|
|
host_name_lookup_init(void) {
|
|
char *hostspath;
|
|
|
|
#ifdef HAVE_GNU_ADNS
|
|
#ifdef _WIN32
|
|
char *sysroot;
|
|
static char rootpath_nt[] = "\\system32\\drivers\\etc\\hosts";
|
|
static char rootpath_ot[] = "\\hosts";
|
|
#endif /* _WIN32 */
|
|
#endif /*GNU_ADNS */
|
|
|
|
/*
|
|
* Load the user's hosts file, if they have one.
|
|
*/
|
|
hostspath = get_persconffile_path(ENAME_HOSTS, FALSE, FALSE);
|
|
if (!read_hosts_file(hostspath) && errno != ENOENT) {
|
|
report_open_failure(hostspath, errno, FALSE);
|
|
}
|
|
g_free(hostspath);
|
|
|
|
/*
|
|
* Load the global hosts file, if we have one.
|
|
*/
|
|
hostspath = get_datafile_path(ENAME_HOSTS);
|
|
if (!read_hosts_file(hostspath) && errno != ENOENT) {
|
|
report_open_failure(hostspath, errno, FALSE);
|
|
}
|
|
g_free(hostspath);
|
|
|
|
#ifdef HAVE_C_ARES
|
|
if (ares_init(&alchan) == ARES_SUCCESS) {
|
|
c_ares_initialized = TRUE;
|
|
}
|
|
#else
|
|
#ifdef HAVE_GNU_ADNS
|
|
/*
|
|
* We're using GNU ADNS, which doesn't check the system hosts file;
|
|
* we load that file ourselves.
|
|
*/
|
|
#ifdef _WIN32
|
|
|
|
sysroot = getenv_utf8("WINDIR");
|
|
if (sysroot != NULL) {
|
|
/*
|
|
* The file should be under WINDIR.
|
|
* If this is Windows NT (NT 4.0,2K,XP,Server2K3), it's in
|
|
* %WINDIR%\system32\drivers\etc\hosts.
|
|
* If this is Windows OT (95,98,Me), it's in %WINDIR%\hosts.
|
|
* Try both.
|
|
* XXX - should we base it on the dwPlatformId value from
|
|
* GetVersionEx()?
|
|
*/
|
|
hostspath = g_strconcat(sysroot, rootpath_nt, NULL);
|
|
if (!read_hosts_file(hostspath)) {
|
|
g_free(hostspath);
|
|
hostspath = g_strconcat(sysroot, rootpath_ot, NULL);
|
|
read_hosts_file(hostspath);
|
|
}
|
|
g_free(hostspath);
|
|
}
|
|
#else /* _WIN32 */
|
|
read_hosts_file("/etc/hosts");
|
|
#endif /* _WIN32 */
|
|
|
|
/* 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 */
|
|
if (adns_init(&ads, 0, 0 /*0=>stderr*/) != 0) {
|
|
/*
|
|
* XXX - should we report the error? I'm assuming that some crashes
|
|
* reported on a Windows machine with TCP/IP not configured are due
|
|
* to "adns_init()" failing (due to the lack of TCP/IP) and leaving
|
|
* ADNS in a state where it crashes due to that. We'll still try
|
|
* doing name resolution anyway.
|
|
*/
|
|
return;
|
|
}
|
|
gnu_adns_initialized = TRUE;
|
|
adns_in_flight = 0;
|
|
#endif /* HAVE_GNU_ADNS */
|
|
#endif /* HAVE_C_ARES */
|
|
|
|
subnet_name_lookup_init();
|
|
}
|
|
|
|
#ifdef HAVE_C_ARES
|
|
gboolean
|
|
host_name_lookup_process(gpointer data _U_) {
|
|
c_ares_queue_msg_t *caqm;
|
|
struct timeval tv = { 0, 0 };
|
|
int nfds;
|
|
fd_set rfds, wfds;
|
|
|
|
c_ares_queue_head = g_list_first(c_ares_queue_head);
|
|
|
|
while (c_ares_queue_head && c_ares_in_flight <= prefs.name_resolve_concurrency) {
|
|
caqm = (c_ares_queue_msg_t *) c_ares_queue_head->data;
|
|
c_ares_queue_head = g_list_remove(c_ares_queue_head, (void *) caqm);
|
|
if (caqm->family == AF_INET) {
|
|
ares_gethostbyaddr(alchan, &caqm->addr.ip4, sizeof(guint32), AF_INET,
|
|
c_ares_ghba_cb, caqm);
|
|
c_ares_in_flight++;
|
|
} else if (caqm->family == AF_INET6) {
|
|
ares_gethostbyaddr(alchan, &caqm->addr.ip6, sizeof(struct e_in6_addr),
|
|
AF_INET, c_ares_ghba_cb, caqm);
|
|
c_ares_in_flight++;
|
|
}
|
|
}
|
|
|
|
FD_ZERO(&rfds);
|
|
FD_ZERO(&wfds);
|
|
nfds = ares_fds(alchan, &rfds, &wfds);
|
|
if (nfds > 0) {
|
|
select(nfds, &rfds, &wfds, NULL, &tv);
|
|
ares_process(alchan, &rfds, &wfds);
|
|
}
|
|
|
|
/* Keep the timeout in place */
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
host_name_lookup_cleanup(void) {
|
|
GList *cur;
|
|
|
|
cur = g_list_first(c_ares_queue_head);
|
|
while (cur) {
|
|
g_free(cur->data);
|
|
cur = g_list_next (cur);
|
|
}
|
|
|
|
g_list_free(c_ares_queue_head);
|
|
|
|
if (c_ares_initialized)
|
|
ares_destroy(alchan);
|
|
c_ares_initialized = FALSE;
|
|
}
|
|
|
|
#elif defined(HAVE_GNU_ADNS)
|
|
|
|
/* XXX - The ADNS "documentation" isn't very clear:
|
|
* - Do we need to keep our query structures around?
|
|
*/
|
|
gboolean
|
|
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_in_flight <= prefs.name_resolve_concurrency) {
|
|
almsg = (adns_queue_msg_t *) cur->data;
|
|
if (! almsg->submitted && almsg->type == AF_INET) {
|
|
addr_bytes = (guint8 *) &almsg->ip4_addr;
|
|
g_snprintf(addr_str, sizeof addr_str, "%u.%u.%u.%u.in-addr.arpa.", addr_bytes[3],
|
|
addr_bytes[2], addr_bytes[1], addr_bytes[0]);
|
|
/* XXX - what if it fails? */
|
|
adns_submit (ads, addr_str, adns_r_ptr, 0, NULL, &almsg->query);
|
|
almsg->submitted = TRUE;
|
|
adns_in_flight++;
|
|
}
|
|
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_ipv4_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_in_flight--;
|
|
}
|
|
}
|
|
|
|
/* Keep the timeout in place */
|
|
return TRUE;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
if (gnu_adns_initialized)
|
|
adns_finish(ads);
|
|
gnu_adns_initialized = FALSE;
|
|
}
|
|
|
|
#else /* HAVE_GNU_ADNS */
|
|
|
|
gboolean
|
|
host_name_lookup_process(gpointer data _U_) {
|
|
/* Kill the timeout, as there's nothing for it to do */
|
|
return FALSE;
|
|
}
|
|
|
|
void
|
|
host_name_lookup_cleanup(void) {
|
|
}
|
|
|
|
#endif /* HAVE_C_ARES */
|
|
|
|
extern const gchar *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 gchar *get_hostname6(struct e_in6_addr *addr)
|
|
{
|
|
gboolean found;
|
|
|
|
if (!(g_resolv_flags & RESOLV_NETWORK))
|
|
return ip6_to_str(addr);
|
|
if (E_IN6_IS_ADDR_LINKLOCAL(addr) || E_IN6_IS_ADDR_MULTICAST(addr))
|
|
return ip6_to_str(addr);
|
|
return host_name_lookup6(addr, &found);
|
|
}
|
|
|
|
extern void add_ipv4_name(guint addr, const gchar *name)
|
|
{
|
|
int hash_idx;
|
|
hashipv4_t *tp;
|
|
int new_one = TRUE;
|
|
|
|
hash_idx = HASH_IPV4_ADDRESS(addr);
|
|
|
|
tp = ipv4_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = ipv4_table[hash_idx] = (hashipv4_t *)g_malloc(sizeof(hashipv4_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 */
|
|
new_one = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashipv4_t *)g_malloc(sizeof(hashipv4_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
g_strlcpy(tp->name, name, MAXNAMELEN);
|
|
if (new_one) {
|
|
tp->addr = addr;
|
|
tp->next = NULL;
|
|
}
|
|
tp->is_dummy_entry = FALSE;
|
|
|
|
} /* add_ipv4_name */
|
|
|
|
extern void add_ipv6_name(struct e_in6_addr *addrp, const gchar *name)
|
|
{
|
|
int hash_idx;
|
|
hashipv6_t *tp;
|
|
int new_one = TRUE;
|
|
|
|
hash_idx = HASH_IPV6_ADDRESS(*addrp);
|
|
|
|
tp = ipv6_table[hash_idx];
|
|
|
|
if( tp == NULL ) {
|
|
tp = ipv6_table[hash_idx] = (hashipv6_t *)g_malloc(sizeof(hashipv6_t));
|
|
} else {
|
|
while(1) {
|
|
if (memcmp(&tp->addr, addrp, sizeof (struct e_in6_addr)) == 0) {
|
|
/* address already known */
|
|
if (!tp->is_dummy_entry) {
|
|
return;
|
|
} else {
|
|
/* replace this dummy entry with the new one */
|
|
new_one = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
if (tp->next == NULL) {
|
|
tp->next = (hashipv6_t *)g_malloc(sizeof(hashipv6_t));
|
|
tp = tp->next;
|
|
break;
|
|
}
|
|
tp = tp->next;
|
|
}
|
|
}
|
|
|
|
g_strlcpy(tp->name, name, MAXNAMELEN);
|
|
if (new_one) {
|
|
tp->addr = *addrp;
|
|
tp->next = NULL;
|
|
}
|
|
tp->is_dummy_entry = FALSE;
|
|
|
|
} /* add_ipv6_name */
|
|
|
|
/* -----------------
|
|
* unsigned integer to ascii
|
|
*/
|
|
static gchar *ep_utoa(guint port)
|
|
{
|
|
gchar *bp = ep_alloc(MAXNAMELEN);
|
|
|
|
bp = &bp[MAXNAMELEN -1];
|
|
|
|
*bp = 0;
|
|
do {
|
|
*--bp = (port % 10) +'0';
|
|
} while ((port /= 10) != 0);
|
|
return bp;
|
|
}
|
|
|
|
|
|
extern gchar *get_udp_port(guint port)
|
|
{
|
|
|
|
if (!(g_resolv_flags & RESOLV_TRANSPORT)) {
|
|
return ep_utoa(port);
|
|
}
|
|
|
|
return serv_name_lookup(port, PT_UDP);
|
|
|
|
} /* get_udp_port */
|
|
|
|
extern gchar *get_dccp_port(guint port)
|
|
{
|
|
|
|
if (!(g_resolv_flags & RESOLV_TRANSPORT)) {
|
|
return ep_utoa(port);
|
|
}
|
|
|
|
return serv_name_lookup(port, PT_DCCP);
|
|
|
|
} /* get_dccp_port */
|
|
|
|
|
|
extern gchar *get_tcp_port(guint port)
|
|
{
|
|
|
|
if (!(g_resolv_flags & RESOLV_TRANSPORT)) {
|
|
return ep_utoa(port);
|
|
}
|
|
|
|
return serv_name_lookup(port, PT_TCP);
|
|
|
|
} /* get_tcp_port */
|
|
|
|
extern gchar *get_sctp_port(guint port)
|
|
{
|
|
|
|
if (!(g_resolv_flags & RESOLV_TRANSPORT)) {
|
|
return ep_utoa(port);
|
|
}
|
|
|
|
return serv_name_lookup(port, PT_SCTP);
|
|
|
|
} /* get_sctp_port */
|
|
|
|
|
|
const gchar *get_addr_name(address *addr)
|
|
{
|
|
const gchar *result;
|
|
|
|
result = solve_address_to_name(addr);
|
|
|
|
if (result!=NULL){
|
|
return result;
|
|
}
|
|
|
|
/* if it gets here, either it is of type AT_NONE, */
|
|
/* or it should be solvable in address_to_str -unless addr->type is wrongly defined- */
|
|
|
|
if (addr->type == AT_NONE){
|
|
return "NONE";
|
|
}
|
|
|
|
return(address_to_str(addr));
|
|
} /* get_addr_name */
|
|
|
|
|
|
void get_addr_name_buf(address *addr, gchar *buf, guint size)
|
|
{
|
|
const gchar *result = get_addr_name(addr);
|
|
|
|
g_snprintf(buf, size, "%s", result);
|
|
} /* get_addr_name_buf */
|
|
|
|
|
|
extern gchar *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.
|
|
*/
|
|
gchar *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 gchar *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)
|
|
{
|
|
|
|
gchar *host;
|
|
gboolean found;
|
|
|
|
/* first check that IP address can be resolved */
|
|
|
|
if (!(g_resolv_flags & RESOLV_NETWORK) || ((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 gchar *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 gchar *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 gchar *get_manuf_name(const guint8 *addr)
|
|
{
|
|
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)) {
|
|
cur=ep_alloc(MAXMANUFLEN);
|
|
g_snprintf(cur, MAXMANUFLEN, "%02x:%02x:%02x", addr[0], addr[1], addr[2]);
|
|
return cur;
|
|
}
|
|
|
|
return manufp->name;
|
|
|
|
} /* get_manuf_name */
|
|
|
|
|
|
const gchar *get_manuf_name_if_known(const guint8 *addr)
|
|
{
|
|
hashmanuf_t *manufp;
|
|
|
|
if (!eth_resolution_initialized) {
|
|
initialize_ethers();
|
|
eth_resolution_initialized = 1;
|
|
}
|
|
|
|
if ((manufp = manuf_name_lookup(addr)) == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
return manufp->name;
|
|
|
|
} /* get_manuf_name_if_known */
|
|
|
|
|
|
/* 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, "%u.%u.%u.%u", &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;
|
|
}
|
|
|
|
/*
|
|
* Find out whether a hostname resolves to an ip or ipv6 address
|
|
* Return "ip6" if it is IPv6, "ip" otherwise (including the case
|
|
* that we don't know)
|
|
*/
|
|
const char* host_ip_af(const char *host
|
|
#ifndef HAVE_GETHOSTBYNAME2
|
|
_U_
|
|
#endif
|
|
)
|
|
{
|
|
#ifdef HAVE_GETHOSTBYNAME2
|
|
struct hostent *h;
|
|
return (h = gethostbyname2(host, AF_INET6)) && h->h_addrtype == AF_INET6 ? "ip6" : "ip";
|
|
#else
|
|
return "ip";
|
|
#endif
|
|
}
|