2 * Definitions for network object lookup
4 * Laurent Deniel <laurent.deniel@free.fr>
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1998 Gerald Combs
10 * SPDX-License-Identifier: GPL-2.0-or-later
12 /* The buffers returned by these functions are all allocated with a
13 * packet lifetime and does not have have to be freed.
14 * However, take into account that when the packet dissection
15 * completes, these buffers will be automatically reclaimed/freed.
16 * If you need the buffer to remain for a longer scope than packet lifetime
17 * you must copy the content to an wmem_file_scope() buffer.
23 #include <epan/address.h>
24 #include <epan/tvbuff.h>
25 #include <epan/ipv6.h>
26 #include <epan/to_str.h>
27 #include <wiretap/wtap.h>
28 #include "ws_symbol_export.h"
32 #endif /* __cplusplus */
35 #define MAXNAMELEN 64 /* max name length (hostname and port name) */
38 #ifndef MAXVLANNAMELEN
39 #define MAXVLANNAMELEN 128 /* max vlan name length */
42 #define BASE_ENTERPRISES BASE_CUSTOM
43 #define STRINGS_ENTERPRISES CF_FUNC(enterprises_base_custom)
46 * @brief Flags to control name resolution.
48 typedef struct _e_addr_resolve {
49 gboolean mac_name; /**< Whether to resolve Ethernet MAC to manufacturer names */
50 gboolean network_name; /**< Whether to resolve IPv4, IPv6, and IPX addresses into host names */
51 gboolean transport_name; /**< Whether to resolve TCP/UDP/DCCP/SCTP ports into service names */
52 gboolean dns_pkt_addr_resolution; /**< Whether to resolve addresses using captured DNS packets */
53 gboolean use_external_net_name_resolver; /**< Whether to system's configured DNS server to resolve names */
54 gboolean load_hosts_file_from_profile_only; /**< Whether to only load the hosts in the current profile, not hosts files */
55 gboolean vlan_name; /**< Whether to resolve VLAN IDs to names */
56 gboolean ss7pc_name; /**< Whether to resolve SS7 Point Codes to names */
59 #define ADDR_RESOLV_MACADDR(at) \
60 (((at)->type == AT_ETHER))
62 #define ADDR_RESOLV_NETADDR(at) \
63 (((at)->type == AT_IPv4) || ((at)->type == AT_IPv6) || ((at)->type == AT_IPX))
66 typedef struct hashether hashether_t;
69 typedef struct hashmanuf hashmanuf_t;
71 typedef struct serv_port {
80 * Flags for various IPv4/IPv6 hash table entries.
82 #define TRIED_RESOLVE_ADDRESS (1U<<0) /* XXX - what does this bit *really* mean? */
83 #define NAME_RESOLVED (1U<<1) /* the name field contains a host name, not a printable address */
84 #define RESOLVED_ADDRESS_USED (1U<<2) /* a get_hostname* call returned the host name */
86 #define TRIED_OR_RESOLVED_MASK (TRIED_RESOLVE_ADDRESS | NAME_RESOLVED)
87 #define USED_AND_RESOLVED_MASK (NAME_RESOLVED | RESOLVED_ADDRESS_USED)
90 * Flag controlling what names to resolve.
92 WS_DLL_PUBLIC e_addr_resolve gbl_resolv_flags;
94 /* global variables */
96 extern gchar *g_ethers_path;
97 extern gchar *g_ipxnets_path;
98 extern gchar *g_pethers_path;
99 extern gchar *g_pipxnets_path;
101 /* Functions in addr_resolv.c */
104 * udp_port_to_display() returns the port name corresponding to that UDP port,
105 * or the port number as a string if not found.
107 WS_DLL_PUBLIC gchar *udp_port_to_display(wmem_allocator_t *allocator, guint port);
110 * tcp_port_to_display() returns the port name corresponding to that TCP port,
111 * or the port number as a string if not found.
113 WS_DLL_PUBLIC gchar *tcp_port_to_display(wmem_allocator_t *allocator, guint port);
116 * dccp_port_to_display() returns the port name corresponding to that DCCP port,
117 * or the port number as a string if not found.
119 extern gchar *dccp_port_to_display(wmem_allocator_t *allocator, guint port);
122 * sctp_port_to_display() returns the port name corresponding to that SCTP port,
123 * or the port number as a string if not found.
125 WS_DLL_PUBLIC gchar *sctp_port_to_display(wmem_allocator_t *allocator, guint port);
128 * serv_name_lookup() returns the well known service name string, or numeric
129 * representation if one doesn't exist.
131 WS_DLL_PUBLIC const gchar *serv_name_lookup(port_type proto, guint port);
134 * enterprises_lookup() returns the private enterprise code string, or 'unknown_str'
135 * if one doesn't exist, or "<Unknown>" if that is NULL.
137 WS_DLL_PUBLIC const gchar *enterprises_lookup(guint32 value, const char *unknown_str);
140 * try_enterprises_lookup() returns the private enterprise code string, or NULL if not found.
142 WS_DLL_PUBLIC const gchar *try_enterprises_lookup(guint32 value);
145 * enterprises_base_custom() prints the "name (decimal)" string to 'buf'.
146 * (Used with BASE_CUSTOM field display).
148 WS_DLL_PUBLIC void enterprises_base_custom(char *buf, guint32 value);
151 * try_serv_name_lookup() returns the well known service name string, or NULL if
154 WS_DLL_PUBLIC const gchar *try_serv_name_lookup(port_type proto, guint port);
157 * port_with_resolution_to_str() prints the "<resolved> (<numerical>)" port
160 WS_DLL_PUBLIC gchar *port_with_resolution_to_str(wmem_allocator_t *scope,
161 port_type proto, guint port);
164 * port_with_resolution_to_str_buf() prints the "<resolved> (<numerical>)" port
165 * string to 'buf'. Return value is the same as g_snprintf().
167 WS_DLL_PUBLIC int port_with_resolution_to_str_buf(gchar *buf, gulong buf_size,
168 port_type proto, guint port);
171 * Asynchronous host name lookup initialization, processing, and cleanup
174 /* Setup name resolution preferences */
176 extern void addr_resolve_pref_init(struct pref_module *nameres);
179 * disable_name_resolution() sets all relevant gbl_resolv_flags to FALSE.
181 WS_DLL_PUBLIC void disable_name_resolution(void);
183 /** If we're using c-ares process outstanding host name lookups.
184 * This is called from a GLIB timeout in Wireshark and before processing
185 * each packet in TShark.
187 * @return True if any new objects have been resolved since the previous
188 * call. This can be used to trigger a display update, e.g. in Wireshark.
190 WS_DLL_PUBLIC gboolean host_name_lookup_process(void);
192 /* get_hostname returns the host name or "%d.%d.%d.%d" if not found */
193 WS_DLL_PUBLIC const gchar *get_hostname(const guint addr);
195 /* get_hostname6 returns the host name, or numeric addr if not found */
196 WS_DLL_PUBLIC const gchar *get_hostname6(const ws_in6_addr *ad);
198 /* get_ether_name returns the logical name if found in ethers files else
199 "<vendor>_%02x:%02x:%02x" if the vendor code is known else
200 "%02x:%02x:%02x:%02x:%02x:%02x" */
201 WS_DLL_PUBLIC const gchar *get_ether_name(const guint8 *addr);
203 /* get_hostname_ss7pc returns the logical name if found in ss7pcs file else
204 '\0' on the first call or the unresolved Point Code in the subsequent calls */
205 const gchar *get_hostname_ss7pc(const guint8 ni, const guint32 pc);
207 /* fill_unresolved_ss7pc initializes the unresolved Point Code Address string in the hashtable */
208 void fill_unresolved_ss7pc(const gchar * pc_addr, const guint8 ni, const guint32 pc);
211 /* Same as get_ether_name with tvb support */
212 WS_DLL_PUBLIC const gchar *tvb_get_ether_name(tvbuff_t *tvb, gint offset);
214 /* get_ether_name_if_known returns the logical name if found in ethers files else NULL */
215 const gchar *get_ether_name_if_known(const guint8 *addr);
218 * Given a sequence of 3 octets containing an OID, get_manuf_name()
219 * returns the vendor name, or "%02x:%02x:%02x" if not known.
221 extern const gchar *get_manuf_name(const guint8 *addr);
224 * Given a sequence of 3 octets containing an OID, get_manuf_name_if_known()
225 * returns the vendor name, or NULL if not known.
227 WS_DLL_PUBLIC const gchar *get_manuf_name_if_known(const guint8 *addr);
230 * Given an integer containing a 24-bit OID, uint_get_manuf_name_if_known()
231 * returns the vendor name, or NULL if not known.
233 extern const gchar *uint_get_manuf_name_if_known(const guint oid);
236 * Given a tvbuff and an offset in that tvbuff for a 3-octet OID,
237 * tvb_get_manuf_name() returns the vendor name, or "%02x:%02x:%02x"
240 WS_DLL_PUBLIC const gchar *tvb_get_manuf_name(tvbuff_t *tvb, gint offset);
243 * Given a tvbuff and an offset in that tvbuff for a 3-octet OID,
244 * tvb_get_manuf_name_if_known() returns the vendor name, or NULL
247 WS_DLL_PUBLIC const gchar *tvb_get_manuf_name_if_known(tvbuff_t *tvb, gint offset);
249 /* eui64_to_display returns "<vendor>_%02x:%02x:%02x:%02x:%02x:%02x" if the vendor code is known
250 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x" */
251 extern gchar *eui64_to_display(wmem_allocator_t *allocator, const guint64 addr);
253 /* get_ipxnet_name returns the logical name if found in an ipxnets file,
254 * or a string formatted with "%X" if not */
255 extern gchar *get_ipxnet_name(wmem_allocator_t *allocator, const guint32 addr);
257 /* get_vlan_name returns the logical name if found in a vlans file,
258 * or the VLAN ID itself as a string if not found*/
259 extern gchar *get_vlan_name(wmem_allocator_t *allocator, const guint16 id);
261 WS_DLL_PUBLIC guint get_hash_ether_status(hashether_t* ether);
262 WS_DLL_PUBLIC char* get_hash_ether_hexaddr(hashether_t* ether);
263 WS_DLL_PUBLIC char* get_hash_ether_resolved_name(hashether_t* ether);
265 WS_DLL_PUBLIC char* get_hash_manuf_resolved_name(hashmanuf_t* manuf);
268 /* adds a hostname/IPv4 in the hash table */
269 WS_DLL_PUBLIC void add_ipv4_name(const guint addr, const gchar *name);
271 /* adds a hostname/IPv6 in the hash table */
272 WS_DLL_PUBLIC void add_ipv6_name(const ws_in6_addr *addr, const gchar *name);
274 /** Add an additional "hosts" file for IPv4 and IPv6 name resolution.
276 * The file can be added before host_name_lookup_init() is called and
277 * will be re-read each time host_name_lookup_init() is called.
279 * @param hosts_file Absolute path to the hosts file.
281 * @return TRUE if the hosts file can be read.
283 WS_DLL_PUBLIC gboolean add_hosts_file (const char *hosts_file);
285 /* adds a hostname in the hash table */
286 WS_DLL_PUBLIC gboolean add_ip_name_from_string (const char *addr, const char *name);
289 /** Get lists of host name to address mappings we know about.
291 * The struct contains two g_lists one with hashipv4_t entries and one with hashipv6_t entries.
293 * @return a struct with lists of known addresses(IPv4 and IPv6). May be NULL.
295 WS_DLL_PUBLIC addrinfo_lists_t *get_addrinfo_list(void);
297 /* add ethernet address / name corresponding to IP address */
298 extern void add_ether_byip(const guint ip, const guint8 *eth);
300 /** Translates a string representing a hostname or dotted-decimal IPv4 address
301 * into a numeric IPv4 address value in network byte order. If compiled with
302 * c-ares, the request will wait a maximum of 250ms for the request to finish.
303 * Otherwise the wait time will be system-dependent, ususally much longer.
304 * Immediately returns FALSE for hostnames if network name resolution is
307 * @param[in] host The hostname.
308 * @param[out] addrp The numeric IPv4 address in network byte order.
309 * @return TRUE on success, FALSE on failure, timeout.
312 gboolean get_host_ipaddr(const char *host, guint32 *addrp);
314 /** Translates a string representing a hostname or colon-hex IPv6 address
315 * into a numeric IPv6 address value in network byte order. If compiled with
316 * c-ares, the request will wait a maximum of 250ms for the request to finish.
317 * Otherwise the wait time will be system-dependent, usually much longer.
318 * Immediately returns FALSE for hostnames if network name resolution is
321 * @param[in] host The hostname.
322 * @param[out] addrp The numeric IPv6 address in network byte order.
323 * @return TRUE on success, FALSE on failure or timeout.
326 gboolean get_host_ipaddr6(const char *host, ws_in6_addr *addrp);
329 wmem_map_t *get_manuf_hashtable(void);
332 wmem_map_t *get_wka_hashtable(void);
335 wmem_map_t *get_eth_hashtable(void);
338 wmem_map_t *get_serv_port_hashtable(void);
341 wmem_map_t *get_ipxnet_hash_table(void);
344 wmem_map_t *get_vlan_hash_table(void);
347 wmem_map_t *get_ipv4_hash_table(void);
350 wmem_map_t *get_ipv6_hash_table(void);
353 * XXX - if we ever have per-session host name etc. information, we
354 * should probably have the "resolve synchronously or asynchronously"
355 * flag be per-session, set with an epan API.
358 void set_resolution_synchrony(gboolean synchronous);
361 * private functions (should only be called by epan directly)
365 void name_resolver_init(void);
367 /* Reinitialize hostname resolution subsystem */
369 void host_name_lookup_reset(void);
372 void addr_resolv_init(void);
375 void addr_resolv_cleanup(void);
378 void manually_resolve_cleanup(void);
381 gboolean str_to_ip(const char *str, void *dst);
384 gboolean str_to_ip6(const char *str, void *dst);
387 gboolean str_to_eth(const char *str, char *eth_bytes);
390 guint ipv6_oat_hash(gconstpointer key);
393 gboolean ipv6_equal(gconstpointer v1, gconstpointer v2);
397 #endif /* __cplusplus */
399 #endif /* __RESOLV_H__ */