addr_resolv.h File Reference

#include <epan/address.h>
#include <epan/tvbuff.h>
#include <wsutil/inet_cidr.h>
#include <epan/to_str.h>
#include <wiretap/wtap.h>
#include "ws_symbol_export.h"

Go to the source code of this file.

Classes
struct	_e_addr_resolve
	Flags to control name resolution. More...
struct	serv_port
struct	_resolved_name

Macros
#define	MAXNAMELEN   64 /* max name length (most names: DNS labels, services, eth) */
#define	MAXVLANNAMELEN   128 /* max vlan name length */
#define	MAXDNSNAMELEN   256 /* max total length of a domain name in the DNS */
#define	BASE_ENTERPRISES   BASE_CUSTOM
#define	STRINGS_ENTERPRISES   CF_FUNC(enterprises_base_custom)
#define	ADDR_RESOLV_MACADDR(at)    (((at)->type == AT_ETHER))
#define	ADDR_RESOLV_NETADDR(at)    (((at)->type == AT_IPv4) || ((at)->type == AT_IPv6) || ((at)->type == AT_IPX))
#define	TRIED_RESOLVE_ADDRESS   (1U<<0) /* name resolution is being/has been tried */
#define	NAME_RESOLVED   (1U<<1) /* the name field contains a host name, not a printable address */
#define	RESOLVED_ADDRESS_USED   (1U<<2) /* a get_hostname* call returned the host name */
#define	STATIC_HOSTNAME   (1U<<3) /* do not update entries from hosts file with DNS responses */
#define	NAME_RESOLVED_PREFIX   (1U<<4) /* name was generated from a prefix (e.g., OUI) instead of the entire address */
#define	TRIED_OR_RESOLVED_MASK   (TRIED_RESOLVE_ADDRESS | NAME_RESOLVED)
#define	USED_AND_RESOLVED_MASK   (NAME_RESOLVED | RESOLVED_ADDRESS_USED)

Typedefs
typedef struct _e_addr_resolve	e_addr_resolve
	Flags to control name resolution.
typedef struct hashether	hashether_t
typedef struct hashwka	hashwka_t
typedef struct hashmanuf	hashmanuf_t
typedef struct serv_port	serv_port_t
typedef struct _resolved_name	resolved_name_t

Functions
WS_DLL_PUBLIC hashipv4_t *	new_ipv4 (const unsigned addr)
WS_DLL_PUBLIC bool	fill_dummy_ip4 (const unsigned addr, hashipv4_t *volatile tp)
WS_DLL_PUBLIC char *	udp_port_to_display (wmem_allocator_t *allocator, unsigned port)
WS_DLL_PUBLIC char *	tcp_port_to_display (wmem_allocator_t *allocator, unsigned port)
char *	dccp_port_to_display (wmem_allocator_t *allocator, unsigned port)
WS_DLL_PUBLIC char *	sctp_port_to_display (wmem_allocator_t *allocator, unsigned port)
WS_DLL_PUBLIC const char *	serv_name_lookup (port_type proto, unsigned port)
WS_DLL_PUBLIC const char *	enterprises_lookup (uint32_t value, const char *unknown_str)
WS_DLL_PUBLIC const char *	try_enterprises_lookup (uint32_t value)
WS_DLL_PUBLIC void	enterprises_base_custom (char *buf, uint32_t value)
WS_DLL_PUBLIC const char *	try_serv_name_lookup (port_type proto, unsigned port)
WS_DLL_PUBLIC char *	port_with_resolution_to_str (wmem_allocator_t *scope, port_type proto, unsigned port)
WS_DLL_PUBLIC int	port_with_resolution_to_str_buf (char *buf, unsigned long buf_size, port_type proto, unsigned port)
void	addr_resolve_pref_init (struct pref_module *nameres)
void	addr_resolve_pref_apply (void)
WS_DLL_PUBLIC void	disable_name_resolution (void)
WS_DLL_PUBLIC bool	host_name_lookup_process (void)
WS_DLL_PUBLIC const char *	get_hostname (const unsigned addr)
WS_DLL_PUBLIC char *	get_hostname_wmem (wmem_allocator_t *allocator, const unsigned addr)
WS_DLL_PUBLIC const char *	get_hostname6 (const ws_in6_addr *ad)
WS_DLL_PUBLIC char *	get_hostname6_wmem (wmem_allocator_t *allocator, const ws_in6_addr *ad)
WS_DLL_PUBLIC const char *	get_ether_name (const uint8_t *addr)
const char *	get_hostname_ss7pc (const uint8_t ni, const uint32_t pc)
void	fill_unresolved_ss7pc (const char *pc_addr, const uint8_t ni, const uint32_t pc)
WS_DLL_PUBLIC const char *	tvb_get_ether_name (tvbuff_t *tvb, int offset)
const char *	get_ether_name_if_known (const uint8_t *addr)
const char *	get_manuf_name (const uint8_t *addr, size_t size)
WS_DLL_PUBLIC const char *	get_manuf_name_if_known (const uint8_t *addr, size_t size)
const char *	uint_get_manuf_name_if_known (const uint32_t oid)
WS_DLL_PUBLIC const char *	tvb_get_manuf_name (tvbuff_t *tvb, int offset)
WS_DLL_PUBLIC const char *	tvb_get_manuf_name_if_known (tvbuff_t *tvb, int offset)
char *	eui64_to_display (wmem_allocator_t *allocator, const uint64_t addr)
char *	get_ipxnet_name (wmem_allocator_t *allocator, const uint32_t addr)
char *	get_vlan_name (wmem_allocator_t *allocator, const uint16_t id)
WS_DLL_PUBLIC unsigned	get_hash_ether_status (hashether_t *ether)
WS_DLL_PUBLIC bool	get_hash_ether_used (hashether_t *ether)
WS_DLL_PUBLIC char *	get_hash_ether_hexaddr (hashether_t *ether)
WS_DLL_PUBLIC char *	get_hash_ether_resolved_name (hashether_t *ether)
WS_DLL_PUBLIC bool	get_hash_manuf_used (hashmanuf_t *manuf)
WS_DLL_PUBLIC char *	get_hash_manuf_resolved_name (hashmanuf_t *manuf)
WS_DLL_PUBLIC bool	get_hash_wka_used (hashwka_t *wka)
WS_DLL_PUBLIC char *	get_hash_wka_resolved_name (hashwka_t *wka)
WS_DLL_PUBLIC void	add_ipv4_name (const unsigned addr, const char *name, const bool static_entry)
WS_DLL_PUBLIC void	add_ipv6_name (const ws_in6_addr *addr, const char *name, const bool static_entry)
WS_DLL_PUBLIC bool	add_hosts_file (const char *hosts_file)
WS_DLL_PUBLIC bool	add_ip_name_from_string (const char *addr, const char *name)
WS_DLL_PUBLIC resolved_name_t *	get_edited_resolved_name (const char *addr)
WS_DLL_PUBLIC addrinfo_lists_t *	get_addrinfo_list (void)
void	add_ether_byip (const unsigned ip, const uint8_t *eth)
WS_DLL_PUBLIC bool	get_host_ipaddr (const char *host, uint32_t *addrp)
WS_DLL_PUBLIC bool	get_host_ipaddr6 (const char *host, ws_in6_addr *addrp)
WS_DLL_PUBLIC wmem_map_t *	get_manuf_hashtable (void)
WS_DLL_PUBLIC wmem_map_t *	get_wka_hashtable (void)
WS_DLL_PUBLIC wmem_map_t *	get_eth_hashtable (void)
WS_DLL_PUBLIC wmem_map_t *	get_serv_port_hashtable (void)
WS_DLL_PUBLIC wmem_map_t *	get_ipxnet_hash_table (void)
WS_DLL_PUBLIC wmem_map_t *	get_vlan_hash_table (void)
WS_DLL_PUBLIC wmem_map_t *	get_ipv4_hash_table (void)
WS_DLL_PUBLIC wmem_map_t *	get_ipv6_hash_table (void)
WS_DLL_PUBLIC void	set_resolution_synchrony (bool synchronous)
WS_DLL_LOCAL void	name_resolver_init (void)
WS_DLL_LOCAL void	host_name_lookup_reset (void)
WS_DLL_LOCAL void	addr_resolv_init (void)
WS_DLL_LOCAL void	addr_resolv_cleanup (void)
WS_DLL_PUBLIC bool	str_to_ip (const char *str, void *dst)
WS_DLL_PUBLIC bool	str_to_ip6 (const char *str, void *dst)
WS_DLL_LOCAL bool	str_to_eth (const char *str, char *eth_bytes)
WS_DLL_LOCAL unsigned	ipv6_oat_hash (const void *key)
WS_DLL_LOCAL gboolean	ipv6_equal (const void *v1, const void *v2)

Variables
WS_DLL_PUBLIC e_addr_resolve	gbl_resolv_flags
char *	g_ethers_path
char *	g_ipxnets_path
char *	g_pethers_path
char *	g_pipxnets_path

Detailed Description

Definitions for network object lookup

Laurent Deniel laure.nosp@m.nt.d.nosp@m.eniel.nosp@m.@fre.nosp@m.e.fr

Wireshark - Network traffic analyzer By Gerald Combs geral.nosp@m.d@wi.nosp@m.resha.nosp@m.rk.o.nosp@m.rg Copyright 1998 Gerald Combs

SPDX-License-Identifier: GPL-2.0-or-later

Function Documentation

add_hosts_file()

WS_DLL_PUBLIC bool add_hosts_file

(

const char *

hosts_file

)

Add an additional "hosts" file for IPv4 and IPv6 name resolution.

The file can be added before host_name_lookup_init() is called and will be re-read each time host_name_lookup_init() is called.

Parameters

hosts_file

Absolute path to the hosts file.

Returns

true if the hosts file can be read.

get_addrinfo_list()

WS_DLL_PUBLIC addrinfo_lists_t * get_addrinfo_list

(

void

)

Get lists of host name to address mappings we know about.

The struct contains two g_lists one with hashipv4_t entries and one with hashipv6_t entries.

Returns

a struct with lists of known addresses(IPv4 and IPv6). May be NULL.

get_host_ipaddr()

WS_DLL_PUBLIC bool get_host_ipaddr	(	const char *	host,
		uint32_t *	addrp
	)

Translates a string representing a hostname or dotted-decimal IPv4 address into a numeric IPv4 address value in network byte order. If compiled with c-ares, the request will wait a maximum of 250ms for the request to finish. Otherwise the wait time will be system-dependent, usually much longer. Immediately returns false for hostnames if network name resolution is disabled.

Parameters

[in]	host	The hostname.
[out]	addrp	The numeric IPv4 address in network byte order.

Returns

true on success, false on failure, timeout.

get_host_ipaddr6()

WS_DLL_PUBLIC bool get_host_ipaddr6	(	const char *	host,
		ws_in6_addr *	addrp
	)

Translates a string representing a hostname or colon-hex IPv6 address into a numeric IPv6 address value in network byte order. If compiled with c-ares, the request will wait a maximum of 250ms for the request to finish. Otherwise the wait time will be system-dependent, usually much longer. Immediately returns false for hostnames if network name resolution is disabled.

Parameters

[in]	host	The hostname.
[out]	addrp	The numeric IPv6 address in network byte order.

Returns

true on success, false on failure or timeout.

host_name_lookup_process()

WS_DLL_PUBLIC bool host_name_lookup_process

(

void

)

If we're using c-ares process outstanding host name lookups. This is called from a GLIB timeout in Wireshark and before processing each packet in the first pass of two-pass TShark.

Returns

True if any new objects have been resolved since the previous call. This can be used to trigger a display update, e.g. in Wireshark.