2 * Routines for network object lookup
6 * Laurent Deniel <laurent.deniel@free.fr>
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
36 * Win32 doesn't have SIGALRM (and it's the OS where name lookup calls
37 * are most likely to take a long time, given the way address-to-name
38 * lookups are done over NBNS).
40 * Mac OS X does have SIGALRM, but if you longjmp() out of a name resolution
41 * call in a signal handler, you might crash, because the state of the
42 * resolution code that sends messages to lookupd might be inconsistent
43 * if you jump out of it in middle of a call.
45 * In at least some Linux distributions (e.g., RedHat Linux 9), if ADNS
46 * is used, we appear to hang in host_name_lookup6() in a gethostbyaddr()
47 * call (and possibly in other gethostbyaddr() calls), because there's
48 * a mutex lock held in gethostbyaddr() and it doesn't get released
49 * if we longjmp out of it.
51 * There's no guarantee that longjmp()ing out of name resolution calls
52 * will work on *any* platform; OpenBSD got rid of the alarm/longjmp
53 * code in tcpdump, to avoid those sorts of problems, and that was
54 * picked up by tcpdump.org tcpdump.
56 * So, for now, we do not define AVOID_DNS_TIMEOUT. If we get a
57 * significantly more complaints about lookups taking a long time,
58 * we can reconsider that decision. (Note that tcpdump originally
59 * added that for the benefit of systems using NIS to look up host
60 * names; that might now be fixed in NIS implementations, for those
61 * sites still using NIS rather than DNS for that....)
68 #ifdef HAVE_NETINET_IN_H
69 # include <netinet/in.h>
76 #ifdef HAVE_ARPA_INET_H
77 #include <arpa/inet.h>
82 #ifdef HAVE_SYS_SOCKET_H
83 #include <sys/socket.h> /* needed to define AF_ values on UNIX */
86 #ifdef HAVE_WINSOCK2_H
87 #include <winsock2.h> /* needed to define AF_ values on Windows */
90 #ifndef HAVE_INET_ATON_H
91 # include "wsutil/inet_aton.h"
94 #ifdef NEED_INET_V6DEFS_H
95 # include "wsutil/inet_v6defs.h"
98 #if defined(_WIN32) && defined(INET6)
99 # include <ws2tcpip.h>
103 # if defined(_WIN32) && !defined(INET6)
104 # define socklen_t unsigned int
107 # include <ares_version.h>
109 # ifdef HAVE_GNU_ADNS
112 # if defined(inet_aton) && defined(_WIN32)
115 # endif /* HAVE_GNU_ADNS */
116 #endif /* HAVE_C_ARES */
122 #include "addr_and_mask.h"
123 #include "ipv6-utils.h"
124 #include "addr_resolv.h"
125 #include "filesystem.h"
127 #include <wsutil/report_err.h>
128 #include <wsutil/file_util.h>
130 #include <epan/strutil.h>
131 #include <epan/prefs.h>
132 #include <epan/emem.h>
134 #define ENAME_HOSTS "hosts"
135 #define ENAME_SUBNETS "subnets"
136 #define ENAME_ETHERS "ethers"
137 #define ENAME_IPXNETS "ipxnets"
138 #define ENAME_MANUF "manuf"
139 #define ENAME_SERVICES "services"
141 #define HASHETHSIZE 2048
142 #define HASHHOSTSIZE 2048
143 #define HASHIPXNETSIZE 256
144 #define SUBNETLENGTHSIZE 32 /*1-32 inc.*/
146 /* g_int64_hash() and g_int64_equal() first appear in GLib 2.22, make a local copy here */
147 #if !GLIB_CHECK_VERSION(2,22,0)
150 * @v1: a pointer to a #gint64 key
151 * @v2: a pointer to a #gint64 key to compare with @v1
153 * Compares the two #gint64 values being pointed to and returns
154 * %TRUE if they are equal.
155 * It can be passed to g_hash_table_new() as the @key_equal_func
156 * parameter, when using non-%NULL pointers to 64-bit integers as keys in a
159 * Returns: %TRUE if the two keys match.
164 g_int64_equal (gconstpointer v1,
167 return *((const gint64*) v1) == *((const gint64*) v2);
172 * @v: a pointer to a #gint64 key
174 * Converts a pointer to a #gint64 to a hash value.
176 * It can be passed to g_hash_table_new() as the @hash_func parameter,
177 * when using non-%NULL pointers to 64-bit integer values as keys in a
180 * Returns: a hash value corresponding to the key.
185 g_int64_hash (gconstpointer v)
187 return (guint) *(const gint64*) v;
190 #endif /* GLIB_CHECK_VERSION(2,22,0) */
191 /* hash table used for IPv4 lookup */
193 #define HASH_IPV4_ADDRESS(addr) (g_htonl(addr) & (HASHHOSTSIZE - 1))
196 typedef struct sub_net_hashipv4 {
198 guint8 flags; /* B0 dummy_entry, B1 resolve, B2 If the address is used in the trace */
199 struct sub_net_hashipv4 *next;
201 gchar name[MAXNAMELEN];
202 } sub_net_hashipv4_t;
204 /* Array of entries of subnets of different lengths */
206 gsize mask_length; /*1-32*/
207 guint32 mask; /* e.g. 255.255.255.*/
208 sub_net_hashipv4_t** subnet_addresses; /* Hash table of subnet addresses */
209 } subnet_length_entry_t;
213 typedef struct serv_port {
220 /* hash table used for IPX network lookup */
222 /* XXX - check goodness of hash function */
224 #define HASH_IPX_NET(net) ((net) & (HASHIPXNETSIZE - 1))
226 typedef struct hashipxnet {
228 struct hashipxnet *next;
229 gchar name[MAXNAMELEN];
232 /* hash tables used for ethernet and manufacturer lookup */
233 #define HASHETHER_STATUS_UNRESOLVED 1
234 #define HASHETHER_STATUS_RESOLVED_DUMMY 2
235 #define HASHETHER_STATUS_RESOLVED_NAME 3
238 typedef struct hashether {
239 struct hashether *next;
240 guint status; /* (See above) */
243 char resolved_name[MAXNAMELEN];
246 /* internal ethernet type */
248 typedef struct _ether
251 char name[MAXNAMELEN];
254 /* internal ipxnet type */
256 typedef struct _ipxnet
259 char name[MAXNAMELEN];
262 static GHashTable *ipxnet_hash_table = NULL;
263 static GHashTable *ipv4_hash_table = NULL;
264 static GHashTable *ipv6_hash_table = NULL;
266 static GSList *manual_resolved_ipv4_list = NULL;
267 static GSList *manual_resolved_ipv6_list = NULL;
269 typedef struct _resolved_ipv4
272 char name[MAXNAMELEN];
275 typedef struct _resolved_ipv6
277 struct e_in6_addr ip6_addr;
278 char name[MAXNAMELEN];
281 static addrinfo_lists_t addrinfo_lists = { NULL, NULL};
283 static gchar *cb_service;
284 static port_type cb_proto = PT_NONE;
287 static GHashTable *manuf_hashtable = NULL;
288 static GHashTable *wka_hashtable = NULL;
289 static GHashTable *eth_hashtable = NULL;
290 static GHashTable *serv_port_hashtable = NULL;
292 static subnet_length_entry_t subnet_length_entries[SUBNETLENGTHSIZE]; /* Ordered array of entries */
293 static gboolean have_subnet_entry = FALSE;
295 static gboolean new_resolved_objects = FALSE;
297 static GPtrArray* extra_hosts_files = NULL;
299 static hashether_t *add_eth_name(const guint8 *addr, const gchar *name);
300 static void add_serv_port_cb(const guint32 port);
303 /* http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx#existing
307 ipv6_oat_hash(gconstpointer key)
310 const unsigned char *p = (const unsigned char *)key;
314 for ( i = 0; i < len; i++ ) {
328 ipv6_equal(gconstpointer v1, gconstpointer v2)
331 if( memcmp(v1, v2, sizeof (struct e_in6_addr)) == 0 ) {
339 * Flag controlling what names to resolve.
341 e_addr_resolve gbl_resolv_flags = {TRUE, FALSE, TRUE, TRUE, TRUE, FALSE};
342 #if defined(HAVE_C_ARES) || defined(HAVE_GNU_ADNS)
343 static guint name_resolve_concurrency = 500;
347 * Global variables (can be changed in GUI sections)
348 * XXX - they could be changed in GUI code, but there's currently no
349 * GUI code to change them.
352 gchar *g_ethers_path = NULL; /* global ethers file */
353 gchar *g_pethers_path = NULL; /* personal ethers file */
354 gchar *g_ipxnets_path = NULL; /* global ipxnets file */
355 gchar *g_pipxnets_path = NULL; /* personal ipxnets file */
356 gchar *g_services_path = NULL; /* global services file */
357 gchar *g_pservices_path = NULL; /* personal services file */
358 /* first resolving call */
363 * Submitted queries trigger a callback (c_ares_ghba_cb()).
364 * Queries are added to c_ares_queue_head. During processing, queries are
365 * popped off the front of c_ares_queue_head and submitted using
366 * ares_gethostbyaddr().
367 * The callback processes the response, then frees the request.
370 typedef struct _async_dns_queue_msg
374 struct e_in6_addr ip6;
377 } async_dns_queue_msg_t;
379 typedef struct _async_hostent {
385 #if ( ( ARES_VERSION_MAJOR < 1 ) \
386 || ( 1 == ARES_VERSION_MAJOR && ARES_VERSION_MINOR < 5 ) )
387 static void c_ares_ghba_cb(void *arg, int status, struct hostent *hostent);
389 static void c_ares_ghba_cb(void *arg, int status, int timeouts _U_, struct hostent *hostent);
392 ares_channel ghba_chan; /* ares_gethostbyaddr -- Usually non-interactive, no timeout */
393 ares_channel ghbn_chan; /* ares_gethostbyname -- Usually interactive, timeout */
400 * Submitted queries have to be checked individually using adns_check().
401 * Queries are added to adns_queue_head. During processing, the list is
402 * iterated twice: once to request queries up to the concurrency limit,
403 * and once to check the status of each query.
408 typedef struct _async_dns_queue_msg
414 } async_dns_queue_msg_t;
416 #endif /* HAVE_GNU_ADNS */
417 #endif /* HAVE_C_ARES */
419 static gboolean async_dns_initialized = FALSE;
420 static guint async_dns_in_flight = 0;
421 static GList *async_dns_queue_head = NULL;
423 /* push a dns request */
425 add_async_dns_ipv4(int type, guint32 addr)
427 async_dns_queue_msg_t *msg;
429 msg = g_new(async_dns_queue_msg_t,1);
432 msg->addr.ip4 = addr;
435 msg->ip4_addr = addr;
436 msg->submitted = FALSE;
438 async_dns_queue_head = g_list_append(async_dns_queue_head, (gpointer) msg);
446 const gchar* name; /* Shallow copy */
450 * Miscellaneous functions
454 fgetline(char **buf, int *size, FILE *fp)
459 if (fp == NULL || buf == NULL)
466 *buf = (char *)g_malloc(*size);
476 while ((c = getc(fp)) != EOF && c != '\r' && c != '\n') {
477 if (len+1 >= *size) {
478 *buf = (char *)g_realloc(*buf, *size += BUFSIZ);
483 if (len == 0 && c == EOF)
494 * Local function definitions
496 static subnet_entry_t subnet_lookup(const guint32 addr);
497 static void subnet_entry_set(guint32 subnet_addr, const guint32 mask_length, const gchar* name);
501 add_service_name(port_type proto, const guint port, const char *service_name)
503 serv_port_t *serv_port_table;
506 key = (int *)g_new(int, 1);
509 serv_port_table = (serv_port_t *)g_hash_table_lookup(serv_port_hashtable, &port);
510 if (serv_port_table == NULL) {
511 serv_port_table = g_new0(serv_port_t,1);
512 g_hash_table_insert(serv_port_hashtable, key, serv_port_table);
520 g_free(serv_port_table->tcp_name);
521 serv_port_table->tcp_name = g_strdup(service_name);
524 g_free(serv_port_table->udp_name);
525 serv_port_table->udp_name = g_strdup(service_name);
528 g_free(serv_port_table->sctp_name);
529 serv_port_table->sctp_name = g_strdup(service_name);
532 g_free(serv_port_table->dccp_name);
533 serv_port_table->dccp_name = g_strdup(service_name);
537 /* Should not happen */
540 new_resolved_objects = TRUE;
545 parse_service_line (char *line)
548 * See the services(4) or services(5) man page for services file format
549 * (not available on all systems).
557 range_t *port_rng = NULL;
558 guint32 max_port = MAX_UDP_PORT;
560 if ((cp = strchr(line, '#')))
563 if ((cp = strtok(line, " \t")) == NULL)
568 if ((cp = strtok(NULL, " \t")) == NULL)
573 if (strtok(cp, "/") == NULL)
576 if ((cp = strtok(NULL, "/")) == NULL)
579 /* seems we got all interesting things from the file */
580 if(strcmp(cp, "tcp") == 0) {
581 max_port = MAX_TCP_PORT;
584 else if(strcmp(cp, "udp") == 0) {
585 max_port = MAX_UDP_PORT;
588 else if(strcmp(cp, "sctp") == 0) {
589 max_port = MAX_SCTP_PORT;
592 else if(strcmp(cp, "dccp") == 0) {
593 max_port = MAX_DCCP_PORT;
599 if(CVT_NO_ERROR != range_convert_str(&port_rng, port, max_port) ) {
600 /* some assertion here? */
604 cb_service = service;
606 range_foreach(port_rng, add_serv_port_cb);
609 } /* parse_service_line */
613 add_serv_port_cb(const guint32 port)
616 add_service_name(cb_proto, port, cb_service);
622 parse_services_file(const char * path)
626 static char *buf = NULL;
628 /* services hash table initialization */
629 serv_p = ws_fopen(path, "r");
634 while (fgetline(&buf, &size, serv_p) >= 0) {
635 parse_service_line (buf);
642 * unsigned integer to ascii
647 gchar *bp = (gchar *)ep_alloc(MAXNAMELEN);
649 /* XXX, guint32_to_str() ? */
650 guint32_to_str_buf(port, bp, MAXNAMELEN);
656 *serv_name_lookup(const guint port, const port_type proto)
658 serv_port_t *serv_port_table;
661 serv_port_table = (serv_port_t *)g_hash_table_lookup(serv_port_hashtable, &port);
664 /* Set which table we should look up port in */
667 if(serv_port_table->udp_name){
668 return serv_port_table->udp_name;
672 if(serv_port_table->tcp_name){
673 return serv_port_table->tcp_name;
677 if(serv_port_table->sctp_name){
678 return serv_port_table->sctp_name;
682 if(serv_port_table->dccp_name){
683 return serv_port_table->dccp_name;
687 /* not yet implemented */
693 /* getservbyport() was used here but it was to expensive, if the functionality is desired
694 * it would be better to pre parse etc/services or C:\Windows\System32\drivers\etc at
697 name = (gchar*)g_malloc(16);
698 guint32_to_str_buf(port, name, 16);
700 if(serv_port_table == NULL){
703 key = (int *)g_new(int, 1);
705 serv_port_table = g_new0(serv_port_t,1);
706 g_hash_table_insert(serv_port_hashtable, key, serv_port_table);
710 serv_port_table->udp_name = name;
713 serv_port_table->tcp_name = name;
716 serv_port_table->sctp_name = name;
719 serv_port_table->dccp_name = name;
727 } /* serv_name_lookup */
730 destroy_serv_port(gpointer data)
732 serv_port_t *table = (serv_port_t*)data;
733 g_free(table->udp_name);
734 g_free(table->tcp_name);
735 g_free(table->sctp_name);
736 g_free(table->dccp_name);
741 initialize_services(void)
746 static char rootpath_nt[] = "\\system32\\drivers\\etc\\services";
749 /* the hash table won't ignore duplicates, so use the personal path first */
750 g_assert(serv_port_hashtable == NULL);
751 serv_port_hashtable = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, destroy_serv_port);
753 /* Read the system services file first */
756 sysroot = getenv_utf8("WINDIR");
757 if (sysroot != NULL) {
759 * The file should be under WINDIR.
760 * If this is Windows NT (NT 4.0,2K,XP,Server2K3), it's in
761 * %WINDIR%\system32\drivers\etc\services.
763 hostspath = g_strconcat(sysroot, rootpath_nt, NULL);
764 parse_services_file(hostspath);
768 parse_services_file("/etc/services");
772 /* set personal services path */
773 if (g_pservices_path == NULL)
774 g_pservices_path = get_persconffile_path(ENAME_SERVICES, FALSE);
776 parse_services_file(g_pservices_path);
778 /* Compute the pathname of the services file. */
779 if (g_services_path == NULL) {
780 g_services_path = get_datafile_path(ENAME_SERVICES);
783 parse_services_file(g_services_path);
785 } /* initialize_services */
788 service_name_lookup_cleanup(void)
790 if(serv_port_hashtable){
791 g_hash_table_destroy(serv_port_hashtable);
792 serv_port_hashtable = NULL;
796 /* Fill in an IP4 structure with info from subnets file or just with the
797 * string form of the address.
800 fill_dummy_ip4(const guint addr, hashipv4_t* volatile tp)
802 subnet_entry_t subnet_entry;
804 if ((tp->flags & DUMMY_ADDRESS_ENTRY) == DUMMY_ADDRESS_ENTRY)
805 return; /* already done */
807 tp->flags = tp->flags | DUMMY_ADDRESS_ENTRY; /* Overwrite if we get async DNS reply */
809 /* Do we have a subnet for this address? */
810 subnet_entry = subnet_lookup(addr);
811 if(0 != subnet_entry.mask) {
812 /* Print name, then '.' then IP address after subnet mask */
814 gchar buffer[MAX_IP_STR_LEN];
818 host_addr = addr & (~(guint32)subnet_entry.mask);
819 ip_to_str_buf((guint8 *)&host_addr, buffer, MAX_IP_STR_LEN);
822 /* Skip to first octet that is not totally masked
823 * If length of mask is 32, we chomp the whole address.
824 * If the address string starts '.' (should not happen?),
827 i = subnet_entry.mask_length / 8;
828 while(*(paddr) != '\0' && i > 0) {
829 if(*(++paddr) == '.') {
834 /* There are more efficient ways to do this, but this is safe if we
835 * trust g_snprintf and MAXNAMELEN
837 g_snprintf(tp->name, MAXNAMELEN, "%s%s", subnet_entry.name, paddr);
839 ip_to_str_buf((const guint8 *)&addr, tp->name, MAXNAMELEN);
849 #if ( ( ARES_VERSION_MAJOR < 1 ) \
850 || ( 1 == ARES_VERSION_MAJOR && ARES_VERSION_MINOR < 5 ) )
858 async_dns_queue_msg_t *caqm = (async_dns_queue_msg_t *)arg;
862 /* XXX, what to do if async_dns_in_flight == 0? */
863 async_dns_in_flight--;
865 if (status == ARES_SUCCESS) {
866 for (p = he->h_addr_list; *p != NULL; p++) {
867 switch(caqm->family) {
869 add_ipv4_name(caqm->addr.ip4, he->h_name);
872 add_ipv6_name(&caqm->addr.ip6, he->h_name);
875 /* Throw an exception? */
882 #endif /* HAVE_C_ARES */
884 /* --------------- */
886 new_ipv4(const guint addr)
888 hashipv4_t *tp = g_new(hashipv4_t, 1);
891 ip_to_str_buf((const guint8 *)&addr, tp->ip, sizeof(tp->ip));
896 host_lookup(const guint addr, gboolean *found)
898 hashipv4_t * volatile tp;
902 tp = (hashipv4_t *)g_hash_table_lookup(ipv4_hash_table, &addr);
906 key = (int *)g_new(int, 1);
909 g_hash_table_insert(ipv4_hash_table, key, tp);
911 if ((tp->flags & DUMMY_AND_RESOLVE_FLGS) == DUMMY_ADDRESS_ENTRY){
914 if ((tp->flags & DUMMY_ADDRESS_ENTRY) == DUMMY_ADDRESS_ENTRY){
921 if (gbl_resolv_flags.network_name && gbl_resolv_flags.use_external_net_name_resolver) {
922 tp->flags = tp->flags|TRIED_RESOLVE_ADDRESS;
925 if (gbl_resolv_flags.concurrent_dns &&
926 name_resolve_concurrency > 0 &&
927 async_dns_initialized) {
928 add_async_dns_ipv4(AF_INET, addr);
929 /* XXX found is set to TRUE, which seems a bit odd, but I'm not
930 * going to risk changing the semantics.
932 fill_dummy_ip4(addr, tp);
935 #endif /* ASYNC_DNS */
937 /* unknown host or DNS timeout */
943 fill_dummy_ip4(addr, tp);
948 /* --------------- */
950 new_ipv6(const struct e_in6_addr *addr)
952 hashipv6_t *tp = g_new(hashipv6_t,1);
955 ip6_to_str_buf(addr, tp->ip6);
959 /* ------------------------------------ */
961 host_lookup6(const struct e_in6_addr *addr, gboolean *found)
963 hashipv6_t * volatile tp;
966 async_dns_queue_msg_t *caqm;
967 #endif /* HAVE_C_ARES */
972 tp = (hashipv6_t *)g_hash_table_lookup(ipv6_hash_table, addr);
974 struct e_in6_addr *addr_key;
976 addr_key = g_new(struct e_in6_addr,1);
978 memcpy(addr_key, addr, 16);
979 g_hash_table_insert(ipv6_hash_table, addr_key, tp);
981 if ((tp->flags & DUMMY_AND_RESOLVE_FLGS) == DUMMY_ADDRESS_ENTRY){
984 if ((tp->flags & DUMMY_ADDRESS_ENTRY) == DUMMY_ADDRESS_ENTRY){
991 if (gbl_resolv_flags.network_name &&
992 gbl_resolv_flags.use_external_net_name_resolver) {
993 tp->flags = tp->flags|TRIED_RESOLVE_ADDRESS;
997 if ((gbl_resolv_flags.concurrent_dns) &&
998 name_resolve_concurrency > 0 &&
999 async_dns_initialized) {
1000 caqm = g_new(async_dns_queue_msg_t,1);
1001 caqm->family = AF_INET6;
1002 memcpy(&caqm->addr.ip6, addr, sizeof(caqm->addr.ip6));
1003 async_dns_queue_head = g_list_append(async_dns_queue_head, (gpointer) caqm);
1005 /* XXX found is set to TRUE, which seems a bit odd, but I'm not
1006 * going to risk changing the semantics.
1008 if ((tp->flags & DUMMY_ADDRESS_ENTRY) == 0){
1009 g_strlcpy(tp->name, tp->ip6, MAXNAMELEN);
1010 ip6_to_str_buf(addr, tp->name);
1011 tp->flags = tp->flags | DUMMY_ADDRESS_ENTRY;
1015 #endif /* HAVE_C_ARES */
1020 /* unknown host or DNS timeout */
1021 if ((tp->flags & DUMMY_ADDRESS_ENTRY) == 0) {
1022 tp->flags = tp->flags | DUMMY_ADDRESS_ENTRY;
1023 g_strlcpy(tp->name, tp->ip6, MAXNAMELEN);
1028 } /* host_lookup6 */
1030 static const gchar *
1031 solve_address_to_name(const address *addr)
1033 switch (addr->type) {
1036 return get_ether_name((const guint8 *)addr->data);
1040 memcpy(&ip4_addr, addr->data, sizeof ip4_addr);
1041 return get_hostname(ip4_addr);
1045 struct e_in6_addr ip6_addr;
1046 memcpy(&ip6_addr.bytes, addr->data, sizeof ip6_addr.bytes);
1047 return get_hostname6(&ip6_addr);
1051 return (const gchar *)addr->data;
1058 static const gchar *
1059 se_solve_address_to_name(const address *addr)
1061 switch (addr->type) {
1064 return get_ether_name((const guint8 *)addr->data);
1068 memcpy(&ip4_addr, addr->data, sizeof ip4_addr);
1069 return get_hostname(ip4_addr);
1073 struct e_in6_addr ip6_addr;
1074 memcpy(&ip6_addr.bytes, addr->data, sizeof ip6_addr.bytes);
1075 return get_hostname6(&ip6_addr);
1079 return se_strdup((const gchar *)addr->data);
1087 * Ethernet / manufacturer resolution
1089 * The following functions implement ethernet address resolution and
1090 * ethers files parsing (see ethers(4)).
1092 * The manuf file has the same format as ethers(4) except that names are
1093 * truncated to MAXMANUFLEN-1 (8) characters and that an address contains
1094 * only 3 bytes (instead of 6).
1098 * I decide to not use the existing functions (see ethers(3) on some
1099 * operating systems) for the following reasons:
1100 * - performance gains (use of hash tables and some other enhancements),
1101 * - use of two ethers files (system-wide and per user),
1102 * - avoid the use of NIS maps,
1103 * - lack of these functions on some systems.
1105 * So the following functions do _not_ behave as the standard ones.
1112 * If "manuf_file" is FALSE, parse a 6-byte MAC address.
1113 * If "manuf_file" is TRUE, parse an up-to-6-byte sequence with an optional
1117 parse_ether_address(const char *cp, ether_t *eth, unsigned int *mask,
1118 const gboolean manuf_file)
1125 for (i = 0; i < 6; i++) {
1126 /* Get a hex number, 1 or 2 digits, no sign characters allowed. */
1127 if (!isxdigit((unsigned char)*cp))
1129 num = strtoul(cp, &p, 16);
1131 return FALSE; /* failed */
1133 return FALSE; /* not a valid octet */
1134 eth->addr[i] = (guint8) num;
1135 cp = p; /* skip past the number */
1137 /* OK, what character terminated the octet? */
1139 /* "/" - this has a mask. */
1141 /* Entries with masks are allowed only in the "manuf" files. */
1144 cp++; /* skip past the '/' to get to the mask */
1145 if (!isdigit((unsigned char)*cp))
1146 return FALSE; /* no sign allowed */
1147 num = strtoul(cp, &p, 10);
1149 return FALSE; /* failed */
1150 cp = p; /* skip past the number */
1151 if (*cp != '\0' && !isspace((unsigned char)*cp))
1152 return FALSE; /* bogus terminator */
1153 if (num == 0 || num >= 48)
1154 return FALSE; /* bogus mask */
1155 /* Mask out the bits not covered by the mask */
1157 for (i = 0; num >= 8; i++, num -= 8)
1158 ; /* skip octets entirely covered by the mask */
1159 /* Mask out the first masked octet */
1160 eth->addr[i] &= (0xFF << (8 - num));
1162 /* Mask out completely-masked-out octets */
1168 /* We're at the end of the address, and there's no mask. */
1170 /* We got 3 bytes, so this is a manufacturer ID. */
1172 /* Manufacturer IDs are only allowed in the "manuf"
1176 /* Indicate that this is a manufacturer ID (0 is not allowed
1183 /* We got 6 bytes, so this is a MAC address.
1184 If we're reading one of the "manuf" files, indicate that
1185 this is a MAC address (48 is not allowed as a mask). */
1191 /* We didn't get 3 or 6 bytes, and there's no mask; this is
1196 /* We don't know the separator used in this number; it can either
1197 be ':', '-', or '.'. */
1198 if (*cp != ':' && *cp != '-' && *cp != '.')
1200 sep = *cp; /* subsequent separators must be the same */
1202 /* It has to be the same as the first separator */
1214 parse_ether_line(char *line, ether_t *eth, unsigned int *mask,
1215 const gboolean manuf_file)
1218 * See the ethers(4) or ethers(5) man page for ethers file format
1219 * (not available on all systems).
1220 * We allow both ethernet address separators (':' and '-'),
1221 * as well as Wireshark's '.' separator.
1226 if ((cp = strchr(line, '#')))
1229 if ((cp = strtok(line, " \t")) == NULL)
1232 if (!parse_ether_address(cp, eth, mask, manuf_file))
1235 if ((cp = strtok(NULL, " \t")) == NULL)
1238 g_strlcpy(eth->name, cp, MAXNAMELEN);
1242 } /* parse_ether_line */
1244 static FILE *eth_p = NULL;
1247 set_ethent(char *path)
1252 eth_p = ws_fopen(path, "r");
1265 get_ethent(unsigned int *mask, const gboolean manuf_file)
1269 static int size = 0;
1270 static char *buf = NULL;
1275 while (fgetline(&buf, &size, eth_p) >= 0) {
1276 if (parse_ether_line(buf, ð, mask, manuf_file) == 0) {
1287 get_ethbyname(const gchar *name)
1291 set_ethent(g_pethers_path);
1293 while (((eth = get_ethent(NULL, FALSE)) != NULL) && strncmp(name, eth->name, MAXNAMELEN) != 0)
1299 set_ethent(g_ethers_path);
1301 while (((eth = get_ethent(NULL, FALSE)) != NULL) && strncmp(name, eth->name, MAXNAMELEN) != 0)
1309 } /* get_ethbyname */
1313 get_ethbyaddr(const guint8 *addr)
1318 set_ethent(g_pethers_path);
1320 while (((eth = get_ethent(NULL, FALSE)) != NULL) && memcmp(addr, eth->addr, 6) != 0)
1326 set_ethent(g_ethers_path);
1328 while (((eth = get_ethent(NULL, FALSE)) != NULL) && memcmp(addr, eth->addr, 6) != 0)
1336 } /* get_ethbyaddr */
1340 add_manuf_name(const guint8 *addr, unsigned int mask, gchar *name)
1343 gint64 eth_as_int64, *wka_key;
1344 int eth_as_int, *manuf_key;
1347 * XXX - can we use Standard Annotation Language annotations to
1348 * note that mask, as returned by parse_ethe)r_address() (and thus
1349 * by the routines that call it, and thus passed to us) cannot be > 48,
1350 * or is SAL too weak to express that?
1353 /* This is a well-known MAC address; just add this to the Ethernet
1355 add_eth_name(addr, name);
1359 eth_as_int64 = addr[0];
1360 eth_as_int64 = eth_as_int64<<8;
1362 eth_as_int64 = eth_as_int64 | oct;
1363 eth_as_int64 = eth_as_int64<<8;
1365 eth_as_int64 = eth_as_int64 | oct;
1366 eth_as_int64 = eth_as_int64<<8;
1368 eth_as_int64 = eth_as_int64 | oct;
1369 eth_as_int64 = eth_as_int64<<8;
1371 eth_as_int64 = eth_as_int64 | oct;
1372 eth_as_int64 = eth_as_int64<<8;
1374 eth_as_int64 = eth_as_int64 | oct;
1377 /* This is a manufacturer ID; add it to the manufacturer ID hash table */
1379 /* manuf needs only the 3 most significant octets of the ethernet address */
1380 manuf_key = (int *)g_new(int, 1);
1381 eth_as_int = (int)(eth_as_int64>>24)&0xffffff;
1382 *manuf_key = eth_as_int;
1384 g_hash_table_insert(manuf_hashtable, manuf_key, g_strdup(name));
1388 /* This is a range of well-known addresses; add it to the appropriate
1389 well-known-address table, creating that table if necessary. */
1391 wka_key = (gint64 *)g_new(gint64, 1);
1392 *wka_key = eth_as_int64;
1394 g_hash_table_insert(wka_hashtable, wka_key, g_strdup(name));
1396 } /* add_manuf_name */
1399 manuf_name_lookup(const guint8 *addr)
1401 gint32 manuf_key = 0;
1405 /* manuf needs only the 3 most significant octets of the ethernet address */
1406 manuf_key = addr[0];
1407 manuf_key = manuf_key<<8;
1409 manuf_key = manuf_key | oct;
1410 manuf_key = manuf_key<<8;
1412 manuf_key = manuf_key | oct;
1415 /* first try to find a "perfect match" */
1416 name = (gchar *)g_hash_table_lookup(manuf_hashtable, &manuf_key);
1421 /* Mask out the broadcast/multicast flag but not the locally
1422 * administered flag as localy administered means: not assigend
1423 * by the IEEE but the local administrator instead.
1424 * 0x01 multicast / broadcast bit
1425 * 0x02 locally administered bit */
1426 if((manuf_key & 0x00010000) != 0){
1427 manuf_key &= 0x00FEFFFF;
1428 name = (gchar *)g_hash_table_lookup(manuf_hashtable, &manuf_key);
1436 } /* manuf_name_lookup */
1439 wka_name_lookup(const guint8 *addr, const unsigned int mask)
1441 guint8 masked_addr[6];
1444 gint64 eth_as_int64;
1448 if(wka_hashtable == NULL){
1451 /* Get the part of the address covered by the mask. */
1452 for (i = 0, num = mask; num >= 8; i++, num -= 8)
1453 masked_addr[i] = addr[i]; /* copy octets entirely covered by the mask */
1454 /* Mask out the first masked octet */
1455 masked_addr[i] = addr[i] & (0xFF << (8 - num));
1457 /* Zero out completely-masked-out octets */
1461 eth_as_int64 = masked_addr[0];
1462 eth_as_int64 = eth_as_int64<<8;
1463 oct = masked_addr[1];
1464 eth_as_int64 = eth_as_int64 | oct;
1465 eth_as_int64 = eth_as_int64<<8;
1466 oct = masked_addr[2];
1467 eth_as_int64 = eth_as_int64 | oct;
1468 eth_as_int64 = eth_as_int64<<8;
1469 oct = masked_addr[3];
1470 eth_as_int64 = eth_as_int64 | oct;
1471 eth_as_int64 = eth_as_int64<<8;
1472 oct = masked_addr[4];
1473 eth_as_int64 = eth_as_int64 | oct;
1474 eth_as_int64 = eth_as_int64<<8;
1475 oct = masked_addr[5];
1476 eth_as_int64 = eth_as_int64 | oct;
1478 name = (gchar *)g_hash_table_lookup(wka_hashtable, ð_as_int64);
1482 } /* wka_name_lookup */
1485 initialize_ethers(void)
1491 /* hash table initialization */
1492 wka_hashtable = g_hash_table_new_full(g_int64_hash, g_int64_equal, g_free, g_free);
1493 manuf_hashtable = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
1494 eth_hashtable = g_hash_table_new_full(g_int64_hash, g_int64_equal, g_free, g_free);
1496 /* Compute the pathname of the ethers file. */
1497 if (g_ethers_path == NULL) {
1498 g_ethers_path = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
1499 get_systemfile_dir(), ENAME_ETHERS);
1502 /* Set g_pethers_path here, but don't actually do anything
1503 * with it. It's used in get_ethbyname() and get_ethbyaddr()
1505 if (g_pethers_path == NULL)
1506 g_pethers_path = get_persconffile_path(ENAME_ETHERS, FALSE);
1508 /* Compute the pathname of the manuf file */
1509 manuf_path = get_datafile_path(ENAME_MANUF);
1511 /* Read it and initialize the hash table */
1512 set_ethent(manuf_path);
1514 while ((eth = get_ethent(&mask, TRUE))) {
1515 add_manuf_name(eth->addr, mask, eth->name);
1522 } /* initialize_ethers */
1524 /* this is only needed when shuting down application (if at all) */
1526 eth_name_lookup_cleanup(void)
1529 if(manuf_hashtable) {
1530 g_hash_table_destroy(manuf_hashtable);
1531 manuf_hashtable = NULL;
1534 g_hash_table_destroy(wka_hashtable);
1535 wka_hashtable = NULL;
1539 g_hash_table_destroy(eth_hashtable);
1540 eth_hashtable = NULL;
1545 /* Resolve ethernet address */
1546 static hashether_t *
1547 eth_addr_resolve(hashether_t *tp) {
1549 const guint8 *addr = tp->addr;
1551 if ( (eth = get_ethbyaddr(addr)) != NULL) {
1552 g_strlcpy(tp->resolved_name, eth->name, MAXNAMELEN);
1553 tp->status = HASHETHER_STATUS_RESOLVED_NAME;
1559 /* Unknown name. Try looking for it in the well-known-address
1560 tables for well-known address ranges smaller than 2^24. */
1563 /* Only the topmost 5 bytes participate fully */
1564 if ((name = wka_name_lookup(addr, mask+40)) != NULL) {
1565 g_snprintf(tp->resolved_name, MAXNAMELEN, "%s_%02x",
1566 name, addr[5] & (0xFF >> mask));
1567 tp->status = HASHETHER_STATUS_RESOLVED_DUMMY;
1577 /* Only the topmost 4 bytes participate fully */
1578 if ((name = wka_name_lookup(addr, mask+32)) != NULL) {
1579 g_snprintf(tp->resolved_name, MAXNAMELEN, "%s_%02x:%02x",
1580 name, addr[4] & (0xFF >> mask), addr[5]);
1581 tp->status = HASHETHER_STATUS_RESOLVED_DUMMY;
1591 /* Only the topmost 3 bytes participate fully */
1592 if ((name = wka_name_lookup(addr, mask+24)) != NULL) {
1593 g_snprintf(tp->resolved_name, MAXNAMELEN, "%s_%02x:%02x:%02x",
1594 name, addr[3] & (0xFF >> mask), addr[4], addr[5]);
1595 tp->status = HASHETHER_STATUS_RESOLVED_DUMMY;
1603 /* Now try looking in the manufacturer table. */
1604 if ((name = manuf_name_lookup(addr)) != NULL) {
1605 g_snprintf(tp->resolved_name, MAXNAMELEN, "%s_%02x:%02x:%02x",
1606 name, addr[3], addr[4], addr[5]);
1607 tp->status = HASHETHER_STATUS_RESOLVED_DUMMY;
1611 /* Now try looking for it in the well-known-address
1612 tables for well-known address ranges larger than 2^24. */
1615 /* Only the topmost 2 bytes participate fully */
1616 if ((name = wka_name_lookup(addr, mask+16)) != NULL) {
1617 g_snprintf(tp->resolved_name, MAXNAMELEN, "%s_%02x:%02x:%02x:%02x",
1618 name, addr[2] & (0xFF >> mask), addr[3], addr[4],
1620 tp->status = HASHETHER_STATUS_RESOLVED_DUMMY;
1630 /* Only the topmost byte participates fully */
1631 if ((name = wka_name_lookup(addr, mask+8)) != NULL) {
1632 g_snprintf(tp->resolved_name, MAXNAMELEN, "%s_%02x:%02x:%02x:%02x:%02x",
1633 name, addr[1] & (0xFF >> mask), addr[2], addr[3],
1635 tp->status = HASHETHER_STATUS_RESOLVED_DUMMY;
1643 for (mask = 7; mask > 0; mask--) {
1644 /* Not even the topmost byte participates fully */
1645 if ((name = wka_name_lookup(addr, mask)) != NULL) {
1646 g_snprintf(tp->resolved_name, MAXNAMELEN, "%s_%02x:%02x:%02x:%02x:%02x:%02x",
1647 name, addr[0] & (0xFF >> mask), addr[1], addr[2],
1648 addr[3], addr[4], addr[5]);
1649 tp->status = HASHETHER_STATUS_RESOLVED_DUMMY;
1654 /* No match whatsoever. */
1655 g_snprintf(tp->resolved_name, MAXNAMELEN, "%s", ether_to_str(addr));
1656 tp->status = HASHETHER_STATUS_RESOLVED_DUMMY;
1659 g_assert_not_reached();
1660 } /* eth_addr_resolve */
1663 eth_to_int64(const guint8 *addr)
1666 gint64 eth_as_int64;
1668 eth_as_int64 = addr[0];
1669 eth_as_int64 = eth_as_int64<<8;
1671 eth_as_int64 = eth_as_int64 | oct;
1672 eth_as_int64 = eth_as_int64<<8;
1674 eth_as_int64 = eth_as_int64 | oct;
1675 eth_as_int64 = eth_as_int64<<8;
1677 eth_as_int64 = eth_as_int64 | oct;
1678 eth_as_int64 = eth_as_int64<<8;
1680 eth_as_int64 = eth_as_int64 | oct;
1681 eth_as_int64 = eth_as_int64<<8;
1683 eth_as_int64 = eth_as_int64 | oct;
1685 return eth_as_int64;
1688 static hashether_t *
1689 eth_hash_new_entry(const guint8 *addr, const gboolean resolve)
1692 gint64 eth_as_int64, *key;
1694 eth_as_int64 = eth_to_int64(addr);
1696 key = (gint64 *)g_new(gint64, 1);
1697 *key = eth_as_int64;
1699 tp = g_new(hashether_t, 1);
1700 memcpy(tp->addr, addr, sizeof(tp->addr));
1701 tp->status = HASHETHER_STATUS_UNRESOLVED;
1702 g_strlcpy(tp->hexaddr, bytestring_to_str(addr, sizeof(tp->addr), ':'), sizeof(tp->hexaddr));
1703 tp->resolved_name[0] = '\0';
1706 eth_addr_resolve(tp);
1708 g_hash_table_insert(eth_hashtable, key, tp);
1711 } /* eth_hash_new_entry */
1713 static hashether_t *
1714 add_eth_name(const guint8 *addr, const gchar *name)
1717 gint64 eth_as_int64;
1719 eth_as_int64 = eth_to_int64(addr);
1721 tp = (hashether_t *)g_hash_table_lookup(eth_hashtable, ð_as_int64);
1724 tp = eth_hash_new_entry(addr, FALSE);
1727 g_strlcpy(tp->resolved_name, name, MAXNAMELEN);
1728 tp->status = HASHETHER_STATUS_RESOLVED_NAME;
1729 new_resolved_objects = TRUE;
1732 } /* add_eth_name */
1734 static hashether_t *
1735 eth_name_lookup(const guint8 *addr, const gboolean resolve)
1738 gint64 eth_as_int64;
1740 eth_as_int64 = eth_to_int64(addr);
1742 tp = (hashether_t *)g_hash_table_lookup(eth_hashtable, ð_as_int64);
1744 tp = eth_hash_new_entry(addr, resolve);
1746 if (resolve && (tp->status == HASHETHER_STATUS_UNRESOLVED)){
1747 eth_addr_resolve(tp); /* Found but needs to be resolved */
1753 } /* eth_name_lookup */
1756 eth_addr_lookup(const gchar *name _U_)
1759 /* XXX Do we need reverse lookup??? */
1762 hashether_t **table = eth_table;
1765 /* to be optimized (hash table from name to addr) */
1766 for (i = 0; i < HASHETHSIZE; i++) {
1769 if (strcmp(tp->resolved_name, name) == 0)
1775 /* not in hash table : performs a file lookup */
1777 if ((eth = get_ethbyname(name)) == NULL)
1780 /* add new entry in hash table */
1782 tp = add_eth_name(eth->addr, name);
1788 } /* eth_addr_lookup */
1793 parse_ipxnets_line(char *line, ipxnet_t *ipxnet)
1796 * We allow three address separators (':', '-', and '.'),
1797 * as well as no separators
1801 guint32 a, a0, a1, a2, a3;
1802 gboolean found_single_number = FALSE;
1804 if ((cp = strchr(line, '#')))
1807 if ((cp = strtok(line, " \t\n")) == NULL)
1810 /* Either fill a0,a1,a2,a3 and found_single_number is FALSE,
1811 * fill a and found_single_number is TRUE,
1814 if (sscanf(cp, "%x:%x:%x:%x", &a0, &a1, &a2, &a3) != 4) {
1815 if (sscanf(cp, "%x-%x-%x-%x", &a0, &a1, &a2, &a3) != 4) {
1816 if (sscanf(cp, "%x.%x.%x.%x", &a0, &a1, &a2, &a3) != 4) {
1817 if (sscanf(cp, "%x", &a) == 1) {
1818 found_single_number = TRUE;
1827 if ((cp = strtok(NULL, " \t\n")) == NULL)
1830 if (found_single_number) {
1834 ipxnet->addr = (a0 << 24) | (a1 << 16) | (a2 << 8) | a3;
1837 g_strlcpy(ipxnet->name, cp, MAXNAMELEN);
1841 } /* parse_ipxnets_line */
1843 static FILE *ipxnet_p = NULL;
1846 set_ipxnetent(char *path)
1851 ipxnet_p = ws_fopen(path, "r");
1867 static ipxnet_t ipxnet;
1868 static int size = 0;
1869 static char *buf = NULL;
1871 if (ipxnet_p == NULL)
1874 while (fgetline(&buf, &size, ipxnet_p) >= 0) {
1875 if (parse_ipxnets_line(buf, &ipxnet) == 0) {
1882 } /* get_ipxnetent */
1887 get_ipxnetbyname(const gchar *name)
1891 set_ipxnetent(g_ipxnets_path);
1893 while (((ipxnet = get_ipxnetent()) != NULL) && strncmp(name, ipxnet->name, MAXNAMELEN) != 0)
1896 if (ipxnet == NULL) {
1899 set_ipxnetent(g_pipxnets_path);
1901 while (((ipxnet = get_ipxnetent()) != NULL) && strncmp(name, ipxnet->name, MAXNAMELEN) != 0)
1909 } /* get_ipxnetbyname */
1913 get_ipxnetbyaddr(guint32 addr)
1917 set_ipxnetent(g_ipxnets_path);
1919 while (((ipxnet = get_ipxnetent()) != NULL) && (addr != ipxnet->addr) ) ;
1921 if (ipxnet == NULL) {
1924 set_ipxnetent(g_pipxnets_path);
1926 while (((ipxnet = get_ipxnetent()) != NULL) && (addr != ipxnet->addr) )
1934 } /* get_ipxnetbyaddr */
1937 initialize_ipxnets(void)
1939 /* Compute the pathname of the ipxnets file.
1941 * XXX - is there a notion of an "ipxnets file" in any flavor of
1942 * UNIX, or with any add-on Netware package for UNIX? If not,
1943 * should the UNIX version of the ipxnets file be in the datafile
1944 * directory as well?
1946 if (g_ipxnets_path == NULL) {
1947 g_ipxnets_path = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
1948 get_systemfile_dir(), ENAME_IPXNETS);
1951 /* Set g_pipxnets_path here, but don't actually do anything
1952 * with it. It's used in get_ipxnetbyname() and get_ipxnetbyaddr()
1954 if (g_pipxnets_path == NULL)
1955 g_pipxnets_path = get_persconffile_path(ENAME_IPXNETS, FALSE);
1957 } /* initialize_ipxnets */
1960 ipx_name_lookup_cleanup(void)
1962 if(ipxnet_hash_table){
1963 g_hash_table_destroy(ipxnet_hash_table);
1964 ipxnet_hash_table = NULL;
1970 static hashipxnet_t *
1971 add_ipxnet_name(guint addr, const gchar *name)
1975 tp = (hashipxnet_t *)g_hash_table_lookup(ipxnet_hash_table, &addr);
1977 g_strlcpy(tp->name, name, MAXNAMELEN);
1981 key = (int *)g_new(int, 1);
1983 tp = g_new(hashipxnet_t,1);
1984 g_strlcpy(tp->name, name, MAXNAMELEN);
1985 g_hash_table_insert(ipxnet_hash_table, key, tp);
1989 g_strlcpy(tp->name, name, MAXNAMELEN);
1991 new_resolved_objects = TRUE;
1995 } /* add_ipxnet_name */
1999 ipxnet_name_lookup(const guint addr)
2004 tp = (hashipxnet_t *)g_hash_table_lookup(ipxnet_hash_table, &addr);
2008 key = (int *)g_new(int, 1);
2010 tp = g_new(hashipxnet_t, 1);
2011 g_hash_table_insert(ipxnet_hash_table, key, tp);
2016 /* fill in a new entry */
2020 if ( (ipxnet = get_ipxnetbyaddr(addr)) == NULL) {
2022 g_snprintf(tp->name, MAXNAMELEN, "%X", addr);
2025 g_strlcpy(tp->name, ipxnet->name, MAXNAMELEN);
2030 } /* ipxnet_name_lookup */
2033 ipxnet_addr_lookup(const gchar *name _U_, gboolean *success)
2038 /* XXX Do we need reverse lookup??? */
2041 hashipxnet_t **table = ipxnet_table;
2044 /* to be optimized (hash table from name to addr) */
2045 for (i = 0; i < HASHIPXNETSIZE; i++) {
2048 if (strcmp(tp->name, name) == 0) {
2056 /* not in hash table : performs a file lookup */
2058 if ((ipxnet = get_ipxnetbyname(name)) == NULL) {
2063 /* add new entry in hash table */
2065 tp = add_ipxnet_name(ipxnet->addr, name);
2070 } /* ipxnet_addr_lookup */
2073 read_hosts_file (const char *hostspath)
2079 guint32 host_addr[4]; /* IPv4 or IPv6 */
2080 struct e_in6_addr ip6_addr;
2085 * See the hosts(4) or hosts(5) man page for hosts file format
2086 * (not available on all systems).
2088 if ((hf = ws_fopen(hostspath, "r")) == NULL)
2091 while (fgetline(&line, &size, hf) >= 0) {
2092 if ((cp = strchr(line, '#')))
2095 if ((cp = strtok(line, " \t")) == NULL)
2096 continue; /* no tokens in the line */
2098 ret = inet_pton(AF_INET6, cp, &host_addr);
2100 continue; /* error parsing */
2105 /* Not valid IPv6 - valid IPv4? */
2106 if (inet_pton(AF_INET, cp, &host_addr) <= 0)
2111 if ((cp = strtok(NULL, " \t")) == NULL)
2112 continue; /* no host name */
2115 memcpy(&ip6_addr, host_addr, sizeof ip6_addr);
2116 add_ipv6_name(&ip6_addr, cp);
2118 add_ipv4_name(host_addr[0], cp);
2121 * Add the aliases, too, if there are any.
2122 * XXX - host_lookup() only returns the first entry.
2124 while ((cp = strtok(NULL, " \t")) != NULL) {
2126 memcpy(&ip6_addr, host_addr, sizeof ip6_addr);
2127 add_ipv6_name(&ip6_addr, cp);
2129 add_ipv4_name(host_addr[0], cp);
2136 } /* read_hosts_file */
2139 add_hosts_file (const char *hosts_file)
2141 gboolean found = FALSE;
2147 if (!extra_hosts_files)
2148 extra_hosts_files = g_ptr_array_new();
2150 for (i = 0; i < extra_hosts_files->len; i++) {
2151 if (strcmp(hosts_file, (const char *) g_ptr_array_index(extra_hosts_files, i)) == 0)
2156 g_ptr_array_add(extra_hosts_files, g_strdup(hosts_file));
2157 return read_hosts_file (hosts_file);
2163 add_ip_name_from_string (const char *addr, const char *name)
2165 guint32 host_addr[4]; /* IPv4 */
2166 struct e_in6_addr ip6_addr; /* IPv6 */
2169 resolved_ipv4_t *resolved_ipv4_entry;
2170 resolved_ipv6_t *resolved_ipv6_entry;
2172 ret = inet_pton(AF_INET6, addr, &ip6_addr);
2174 /* Error parsing address */
2181 /* Not valid IPv6 - valid IPv4? */
2182 if (inet_pton(AF_INET, addr, &host_addr) <= 0)
2183 return FALSE; /* no */
2188 resolved_ipv6_entry = g_new(resolved_ipv6_t, 1);
2189 memcpy(&(resolved_ipv6_entry->ip6_addr), &ip6_addr, 16);
2190 g_strlcpy(resolved_ipv6_entry->name, name, MAXNAMELEN);
2191 manual_resolved_ipv6_list = g_slist_prepend(manual_resolved_ipv6_list, resolved_ipv6_entry);
2193 resolved_ipv4_entry = g_new(resolved_ipv4_t, 1);
2194 resolved_ipv4_entry->host_addr = host_addr[0];
2195 g_strlcpy(resolved_ipv4_entry->name, name, MAXNAMELEN);
2196 manual_resolved_ipv4_list = g_slist_prepend(manual_resolved_ipv4_list, resolved_ipv4_entry);
2200 } /* add_ip_name_from_string */
2203 * Add the resolved addresses that are in use to the list used to create the NRB
2206 ipv4_hash_table_resolved_to_list(gpointer key _U_, gpointer value, gpointer user_data)
2208 addrinfo_lists_t *lists = (addrinfo_lists_t*)user_data;
2209 hashipv4_t *ipv4_hash_table_entry = (hashipv4_t *)value;
2211 if((ipv4_hash_table_entry->flags & USED_AND_RESOLVED_MASK) == RESOLVED_ADDRESS_USED){
2212 lists->ipv4_addr_list = g_list_prepend (lists->ipv4_addr_list, ipv4_hash_table_entry);
2218 * Add the resolved addresses that are in use to the list used to create the NRB
2222 ipv6_hash_table_resolved_to_list(gpointer key _U_, gpointer value, gpointer user_data)
2224 addrinfo_lists_t *lists = (addrinfo_lists_t*)user_data;
2225 hashipv6_t *ipv6_hash_table_entry = (hashipv6_t *)value;
2227 if((ipv6_hash_table_entry->flags & USED_AND_RESOLVED_MASK) == RESOLVED_ADDRESS_USED){
2228 lists->ipv6_addr_list = g_list_prepend (lists->ipv6_addr_list, ipv6_hash_table_entry);
2234 get_addrinfo_list(void) {
2236 if(ipv4_hash_table){
2237 g_hash_table_foreach(ipv4_hash_table, ipv4_hash_table_resolved_to_list, &addrinfo_lists);
2240 if(ipv6_hash_table){
2241 g_hash_table_foreach(ipv6_hash_table, ipv6_hash_table_resolved_to_list, &addrinfo_lists);
2244 return &addrinfo_lists;
2247 /* Read in a list of subnet definition - name pairs.
2248 * <line> = <comment> | <entry> | <whitespace>
2249 * <comment> = <whitespace>#<any>
2250 * <entry> = <subnet_definition> <whitespace> <subnet_name> [<comment>|<whitespace><any>]
2251 * <subnet_definition> = <ipv4_address> / <subnet_mask_length>
2252 * <ipv4_address> is a full address; it will be masked to get the subnet-ID.
2253 * <subnet_mask_length> is a decimal 1-31
2254 * <subnet_name> is a string containing no whitespace.
2255 * <whitespace> = (space | tab)+
2256 * Any malformed entries are ignored.
2257 * Any trailing data after the subnet_name is ignored.
2262 read_subnets_file (const char *subnetspath)
2268 guint32 host_addr; /* IPv4 ONLY */
2271 if ((hf = ws_fopen(subnetspath, "r")) == NULL)
2274 while (fgetline(&line, &size, hf) >= 0) {
2275 if ((cp = strchr(line, '#')))
2278 if ((cp = strtok(line, " \t")) == NULL)
2279 continue; /* no tokens in the line */
2282 /* Expected format is <IP4 address>/<subnet length> */
2283 cp2 = strchr(cp, '/');
2288 *cp2 = '\0'; /* Cut token */
2291 /* Check if this is a valid IPv4 address */
2292 if (inet_pton(AF_INET, cp, &host_addr) <= 0) {
2296 mask_length = atoi(cp2);
2297 if(0 >= mask_length || mask_length > 31) {
2298 continue; /* invalid mask length */
2301 if ((cp = strtok(NULL, " \t")) == NULL)
2302 continue; /* no subnet name */
2304 subnet_entry_set(host_addr, (guint32)mask_length, cp);
2310 } /* read_subnets_file */
2312 static subnet_entry_t
2313 subnet_lookup(const guint32 addr)
2315 subnet_entry_t subnet_entry;
2318 /* Search mask lengths linearly, longest first */
2320 i = SUBNETLENGTHSIZE;
2321 while(have_subnet_entry && i > 0) {
2322 guint32 masked_addr;
2323 subnet_length_entry_t* length_entry;
2325 /* Note that we run from 31 (length 32) to 0 (length 1) */
2327 g_assert(i < SUBNETLENGTHSIZE);
2330 length_entry = &subnet_length_entries[i];
2332 if(NULL != length_entry->subnet_addresses) {
2333 sub_net_hashipv4_t * tp;
2336 masked_addr = addr & length_entry->mask;
2337 hash_idx = HASH_IPV4_ADDRESS(masked_addr);
2339 tp = length_entry->subnet_addresses[hash_idx];
2340 while(tp != NULL && tp->addr != masked_addr) {
2345 subnet_entry.mask = length_entry->mask;
2346 subnet_entry.mask_length = i + 1; /* Length is offset + 1 */
2347 subnet_entry.name = tp->name;
2348 return subnet_entry;
2353 subnet_entry.mask = 0;
2354 subnet_entry.mask_length = 0;
2355 subnet_entry.name = NULL;
2357 return subnet_entry;
2360 /* Add a subnet-definition - name pair to the set.
2361 * The definition is taken by masking the address passed in with the mask of the
2365 subnet_entry_set(guint32 subnet_addr, const guint32 mask_length, const gchar* name)
2367 subnet_length_entry_t* entry;
2368 sub_net_hashipv4_t * tp;
2371 g_assert(mask_length > 0 && mask_length <= 32);
2373 entry = &subnet_length_entries[mask_length - 1];
2375 subnet_addr &= entry->mask;
2377 hash_idx = HASH_IPV4_ADDRESS(subnet_addr);
2379 if(NULL == entry->subnet_addresses) {
2380 entry->subnet_addresses = (sub_net_hashipv4_t**) se_alloc0(sizeof(sub_net_hashipv4_t*) * HASHHOSTSIZE);
2383 if(NULL != (tp = entry->subnet_addresses[hash_idx])) {
2384 if(tp->addr == subnet_addr) {
2385 return; /* XXX provide warning that an address was repeated? */
2387 sub_net_hashipv4_t * new_tp = se_new(sub_net_hashipv4_t);
2392 tp = entry->subnet_addresses[hash_idx] = se_new(sub_net_hashipv4_t);
2396 tp->addr = subnet_addr;
2397 /* Clear DUMMY_ADDRESS_ENTRY */
2398 tp->flags = tp->flags & 0xfe; /*Never used again...*/
2399 g_strlcpy(tp->name, name, MAXNAMELEN); /* This is longer than subnet names can actually be */
2400 have_subnet_entry = TRUE;
2404 subnet_name_lookup_init(void)
2409 for(i = 0; i < SUBNETLENGTHSIZE; ++i) {
2410 guint32 length = i + 1;
2412 subnet_length_entries[i].subnet_addresses = NULL;
2413 subnet_length_entries[i].mask_length = length;
2414 subnet_length_entries[i].mask = g_htonl(ip_get_subnet_mask(length));
2417 subnetspath = get_persconffile_path(ENAME_SUBNETS, FALSE);
2418 if (!read_subnets_file(subnetspath) && errno != ENOENT) {
2419 report_open_failure(subnetspath, errno, FALSE);
2421 g_free(subnetspath);
2424 * Load the global subnets file, if we have one.
2426 subnetspath = get_datafile_path(ENAME_SUBNETS);
2427 if (!read_subnets_file(subnetspath) && errno != ENOENT) {
2428 report_open_failure(subnetspath, errno, FALSE);
2430 g_free(subnetspath);
2435 * External Functions
2439 addr_resolve_pref_init(module_t *nameres)
2441 prefs_register_bool_preference(nameres, "mac_name",
2442 "Resolve MAC addresses",
2443 "Resolve Ethernet MAC address to manufacturer names",
2444 &gbl_resolv_flags.mac_name);
2446 prefs_register_bool_preference(nameres, "transport_name",
2447 "Resolve transport names",
2448 "Resolve TCP/UDP ports into service names",
2449 &gbl_resolv_flags.transport_name);
2451 prefs_register_bool_preference(nameres, "network_name",
2452 "Resolve network (IP) addresses",
2453 "Resolve IPv4, IPv6, and IPX addresses into host names."
2454 " The next set of check boxes determines how name resolution should be performed."
2455 " If no other options are checked name resolution is made from Wireshark's host file,"
2456 " capture file name resolution blocks and DNS packets in the capture.",
2457 &gbl_resolv_flags.network_name);
2459 prefs_register_bool_preference(nameres, "use_external_name_resolver",
2460 "Use an external network name resolver",
2461 "Use your system's configured name resolver"
2462 " (usually DNS) to resolve network names."
2463 " Only applies when network name resolution"
2465 &gbl_resolv_flags.use_external_net_name_resolver);
2467 #if defined(HAVE_C_ARES) || defined(HAVE_GNU_ADNS)
2468 prefs_register_bool_preference(nameres, "concurrent_dns",
2469 "Enable concurrent DNS name resolution",
2470 "Enable concurrent DNS name resolution. Only"
2471 " applies when network name resolution is"
2472 " enabled. You probably want to enable this.",
2473 &gbl_resolv_flags.concurrent_dns);
2475 prefs_register_uint_preference(nameres, "name_resolve_concurrency",
2476 "Maximum concurrent requests",
2477 "The maximum number of DNS requests that may"
2478 " be active at any time. A large value (many"
2479 " thousands) might overload the network or make"
2480 " your DNS server behave badly.",
2482 &name_resolve_concurrency);
2484 prefs_register_static_text_preference(nameres, "concurrent_dns",
2485 "Enable concurrent DNS name resolution: N/A",
2486 "Support for concurrent DNS name resolution was not"
2487 " compiled into this version of Wireshark");
2490 prefs_register_bool_preference(nameres, "hosts_file_handling",
2491 "Only use the profile \"hosts\" file",
2492 "By default \"hosts\" files will be loaded from multiple sources."
2493 " Checking this box only loads the \"hosts\" in the current profile.",
2494 &gbl_resolv_flags.load_hosts_file_from_profile_only);
2500 host_name_lookup_process(void) {
2501 async_dns_queue_msg_t *caqm;
2502 struct timeval tv = { 0, 0 };
2505 gboolean nro = new_resolved_objects;
2507 new_resolved_objects = FALSE;
2509 if (!async_dns_initialized)
2510 /* c-ares not initialized. Bail out and cancel timers. */
2513 async_dns_queue_head = g_list_first(async_dns_queue_head);
2515 while (async_dns_queue_head != NULL && async_dns_in_flight <= name_resolve_concurrency) {
2516 caqm = (async_dns_queue_msg_t *) async_dns_queue_head->data;
2517 async_dns_queue_head = g_list_remove(async_dns_queue_head, (void *) caqm);
2518 if (caqm->family == AF_INET) {
2519 ares_gethostbyaddr(ghba_chan, &caqm->addr.ip4, sizeof(guint32), AF_INET,
2520 c_ares_ghba_cb, caqm);
2521 async_dns_in_flight++;
2522 } else if (caqm->family == AF_INET6) {
2523 ares_gethostbyaddr(ghba_chan, &caqm->addr.ip6, sizeof(struct e_in6_addr),
2524 AF_INET6, c_ares_ghba_cb, caqm);
2525 async_dns_in_flight++;
2531 nfds = ares_fds(ghba_chan, &rfds, &wfds);
2533 if (select(nfds, &rfds, &wfds, NULL, &tv) == -1) { /* call to select() failed */
2534 fprintf(stderr, "Warning: call to select() failed, error is %s\n", strerror(errno));
2537 ares_process(ghba_chan, &rfds, &wfds);
2540 /* Any new entries? */
2545 _host_name_lookup_cleanup(void) {
2548 cur = g_list_first(async_dns_queue_head);
2551 cur = g_list_next (cur);
2554 g_list_free(async_dns_queue_head);
2555 async_dns_queue_head = NULL;
2557 if (async_dns_initialized) {
2558 ares_destroy(ghba_chan);
2559 ares_destroy(ghbn_chan);
2561 #ifdef CARES_HAVE_ARES_LIBRARY_INIT
2562 ares_library_cleanup();
2564 async_dns_initialized = FALSE;
2567 #elif defined(HAVE_GNU_ADNS)
2569 /* XXX - The ADNS "documentation" isn't very clear:
2570 * - Do we need to keep our query structures around?
2573 host_name_lookup_process(void) {
2574 async_dns_queue_msg_t *almsg;
2576 char addr_str[] = "111.222.333.444.in-addr.arpa.";
2581 gboolean nro = new_resolved_objects;
2583 new_resolved_objects = FALSE;
2584 async_dns_queue_head = g_list_first(async_dns_queue_head);
2586 cur = async_dns_queue_head;
2587 while (cur && async_dns_in_flight <= name_resolve_concurrency) {
2588 almsg = (async_dns_queue_msg_t *) cur->data;
2589 if (! almsg->submitted && almsg->type == AF_INET) {
2590 addr_bytes = (guint8 *) &almsg->ip4_addr;
2591 g_snprintf(addr_str, sizeof addr_str, "%u.%u.%u.%u.in-addr.arpa.", addr_bytes[3],
2592 addr_bytes[2], addr_bytes[1], addr_bytes[0]);
2593 /* XXX - what if it fails? */
2594 adns_submit (ads, addr_str, adns_r_ptr, adns_qf_none, NULL, &almsg->query);
2595 almsg->submitted = TRUE;
2596 async_dns_in_flight++;
2601 cur = async_dns_queue_head;
2604 almsg = (async_dns_queue_msg_t *) cur->data;
2605 if (almsg->submitted) {
2606 ret = adns_check(ads, &almsg->query, &ans, NULL);
2608 if (ans->status == adns_s_ok) {
2609 add_ipv4_name(almsg->ip4_addr, *ans->rrs.str);
2616 async_dns_queue_head = g_list_remove(async_dns_queue_head, (void *) almsg);
2618 /* XXX, what to do if async_dns_in_flight == 0? */
2619 async_dns_in_flight--;
2623 /* Keep the timeout in place */
2628 _host_name_lookup_cleanup(void) {
2631 async_dns_queue_head = g_list_first(async_dns_queue_head);
2632 while (async_dns_queue_head) {
2633 qdata = async_dns_queue_head->data;
2634 async_dns_queue_head = g_list_remove(async_dns_queue_head, qdata);
2638 if (async_dns_initialized)
2640 async_dns_initialized = FALSE;
2643 #else /* HAVE_GNU_ADNS */
2646 host_name_lookup_process(void) {
2647 gboolean nro = new_resolved_objects;
2649 new_resolved_objects = FALSE;
2655 _host_name_lookup_cleanup(void) {
2658 #endif /* HAVE_C_ARES */
2661 get_hostname(const guint addr)
2665 /* XXX why do we call this if we're not resolving? To create hash entries?
2668 hashipv4_t *tp = host_lookup(addr, &found);
2670 if (!gbl_resolv_flags.network_name)
2673 tp->flags = tp->flags | RESOLVED_ADDRESS_USED;
2678 /* -------------------------- */
2681 get_hostname6(const struct e_in6_addr *addr)
2685 /* XXX why do we call this if we're not resolving? To create hash entries?
2688 hashipv6_t *tp = host_lookup6(addr, &found);
2690 if (!gbl_resolv_flags.network_name)
2693 tp->flags = tp->flags | RESOLVED_ADDRESS_USED;
2698 /* -------------------------- */
2700 add_ipv4_name(const guint addr, const gchar *name)
2705 * Don't add zero-length names; apparently, some resolvers will return
2706 * them if they get them from DNS.
2708 if (name[0] == '\0')
2712 tp = (hashipv4_t *)g_hash_table_lookup(ipv4_hash_table, &addr);
2714 g_strlcpy(tp->name, name, MAXNAMELEN);
2718 key = (int *)g_new(int, 1);
2720 tp = new_ipv4(addr);
2721 g_strlcpy(tp->name, name, MAXNAMELEN);
2722 g_hash_table_insert(ipv4_hash_table, key, tp);
2725 g_strlcpy(tp->name, name, MAXNAMELEN);
2726 tp->flags = tp->flags | TRIED_RESOLVE_ADDRESS;
2727 new_resolved_objects = TRUE;
2729 } /* add_ipv4_name */
2731 /* -------------------------- */
2733 add_ipv6_name(const struct e_in6_addr *addrp, const gchar *name)
2738 * Don't add zero-length names; apparently, some resolvers will return
2739 * them if they get them from DNS.
2741 if (name[0] == '\0')
2744 tp = (hashipv6_t *)g_hash_table_lookup(ipv6_hash_table, addrp);
2746 g_strlcpy(tp->name, name, MAXNAMELEN);
2748 struct e_in6_addr *addr_key;
2750 addr_key = g_new(struct e_in6_addr,1);
2751 tp = new_ipv6(addrp);
2752 memcpy(addr_key, addrp, 16);
2753 g_strlcpy(tp->name, name, MAXNAMELEN);
2754 g_hash_table_insert(ipv6_hash_table, addr_key, tp);
2757 g_strlcpy(tp->name, name, MAXNAMELEN);
2758 tp->flags = tp->flags | TRIED_RESOLVE_ADDRESS;
2759 new_resolved_objects = TRUE;
2761 } /* add_ipv6_name */
2764 add_manually_resolved_ipv4(gpointer data, gpointer user_data _U_)
2766 resolved_ipv4_t *resolved_ipv4_entry = (resolved_ipv4_t *)data;
2768 add_ipv4_name(resolved_ipv4_entry->host_addr, resolved_ipv4_entry->name);
2772 add_manually_resolved_ipv6(gpointer data, gpointer user_data _U_)
2774 resolved_ipv6_t *resolved_ipv6_entry = (resolved_ipv6_t *)data;
2776 add_ipv6_name(&(resolved_ipv6_entry->ip6_addr), resolved_ipv6_entry->name);
2780 add_manually_resolved(void)
2782 if(manual_resolved_ipv4_list){
2783 g_slist_foreach(manual_resolved_ipv4_list, add_manually_resolved_ipv4, NULL);
2786 if(manual_resolved_ipv6_list){
2787 g_slist_foreach(manual_resolved_ipv6_list, add_manually_resolved_ipv6, NULL);
2792 host_name_lookup_init(void)
2797 #ifdef HAVE_GNU_ADNS
2800 static char rootpath_nt[] = "\\system32\\drivers\\etc\\hosts";
2801 static char rootpath_ot[] = "\\hosts";
2803 #endif /*GNU_ADNS */
2805 g_assert(ipxnet_hash_table == NULL);
2806 ipxnet_hash_table = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
2808 g_assert(ipv4_hash_table == NULL);
2809 ipv4_hash_table = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
2811 g_assert(ipv6_hash_table == NULL);
2812 ipv6_hash_table = g_hash_table_new_full(ipv6_oat_hash, ipv6_equal, g_free, g_free);
2815 * Load the global hosts file, if we have one.
2817 if(!gbl_resolv_flags.load_hosts_file_from_profile_only){
2818 hostspath = get_datafile_path(ENAME_HOSTS);
2819 if (!read_hosts_file(hostspath) && errno != ENOENT) {
2820 report_open_failure(hostspath, errno, FALSE);
2825 * Load the user's hosts file no matter what, if they have one.
2827 hostspath = get_persconffile_path(ENAME_HOSTS, TRUE);
2828 if (!read_hosts_file(hostspath) && errno != ENOENT) {
2829 report_open_failure(hostspath, errno, FALSE);
2833 #ifdef CARES_HAVE_ARES_LIBRARY_INIT
2834 if (ares_library_init(ARES_LIB_INIT_ALL) == ARES_SUCCESS) {
2836 if (ares_init(&ghba_chan) == ARES_SUCCESS && ares_init(&ghbn_chan) == ARES_SUCCESS) {
2837 async_dns_initialized = TRUE;
2839 #ifdef CARES_HAVE_ARES_LIBRARY_INIT
2843 #ifdef HAVE_GNU_ADNS
2845 * We're using GNU ADNS, which doesn't check the system hosts file;
2846 * we load that file ourselves.
2850 sysroot = getenv_utf8("WINDIR");
2851 if (sysroot != NULL) {
2853 * The file should be under WINDIR.
2854 * If this is Windows NT (NT 4.0,2K,XP,Server2K3), it's in
2855 * %WINDIR%\system32\drivers\etc\hosts.
2856 * If this is Windows OT (95,98,Me), it's in %WINDIR%\hosts.
2858 * XXX - should we base it on the dwPlatformId value from
2861 if(!gbl_resolv_flags.load_hosts_file_from_profile_only){
2862 hostspath = g_strconcat(sysroot, rootpath_nt, NULL);
2863 if (!read_hosts_file(hostspath)) {
2865 hostspath = g_strconcat(sysroot, rootpath_ot, NULL);
2866 read_hosts_file(hostspath);
2872 if(!gbl_resolv_flags.load_hosts_file_from_profile_only){
2873 read_hosts_file("/etc/hosts");
2877 /* XXX - Any flags we should be using? */
2878 /* XXX - We could provide config settings for DNS servers, and
2879 pass them to ADNS with adns_init_strcfg */
2880 if (adns_init(&ads, adns_if_none, 0 /*0=>stderr*/) != 0) {
2882 * XXX - should we report the error? I'm assuming that some crashes
2883 * reported on a Windows machine with TCP/IP not configured are due
2884 * to "adns_init()" failing (due to the lack of TCP/IP) and leaving
2885 * ADNS in a state where it crashes due to that. We'll still try
2886 * doing name resolution anyway.
2890 async_dns_initialized = TRUE;
2891 async_dns_in_flight = 0;
2892 #endif /* HAVE_GNU_ADNS */
2893 #endif /* HAVE_C_ARES */
2895 if(extra_hosts_files && !gbl_resolv_flags.load_hosts_file_from_profile_only){
2896 for (i = 0; i < extra_hosts_files->len; i++) {
2897 read_hosts_file((const char *) g_ptr_array_index(extra_hosts_files, i));
2901 subnet_name_lookup_init();
2903 add_manually_resolved();
2907 host_name_lookup_cleanup(void)
2909 _host_name_lookup_cleanup();
2911 if(ipxnet_hash_table){
2912 g_hash_table_destroy(ipxnet_hash_table);
2913 ipxnet_hash_table = NULL;
2916 if(ipv4_hash_table){
2917 g_hash_table_destroy(ipv4_hash_table);
2918 ipv4_hash_table = NULL;
2921 if(ipv6_hash_table){
2922 g_hash_table_destroy(ipv6_hash_table);
2923 ipv6_hash_table = NULL;
2926 memset(subnet_length_entries, 0, sizeof(subnet_length_entries));
2928 have_subnet_entry = FALSE;
2929 new_resolved_objects = FALSE;
2933 manual_resolve_cleanup(void)
2935 if(manual_resolved_ipv4_list){
2936 g_slist_free_full(manual_resolved_ipv4_list, g_free);
2937 manual_resolved_ipv4_list = NULL;
2939 if(manual_resolved_ipv6_list){
2940 g_slist_free_full(manual_resolved_ipv6_list, g_free);
2941 manual_resolved_ipv6_list = NULL;
2947 get_udp_port(guint port)
2950 if (!gbl_resolv_flags.transport_name) {
2951 return ep_utoa(port);
2954 return serv_name_lookup(port, PT_UDP);
2956 } /* get_udp_port */
2959 get_dccp_port(guint port)
2962 if (!gbl_resolv_flags.transport_name) {
2963 return ep_utoa(port);
2966 return serv_name_lookup(port, PT_DCCP);
2968 } /* get_dccp_port */
2971 get_tcp_port(guint port)
2974 if (!gbl_resolv_flags.transport_name) {
2975 return ep_utoa(port);
2978 return serv_name_lookup(port, PT_TCP);
2980 } /* get_tcp_port */
2983 get_sctp_port(guint port)
2986 if (!gbl_resolv_flags.transport_name) {
2987 return ep_utoa(port);
2990 return serv_name_lookup(port, PT_SCTP);
2992 } /* get_sctp_port */
2995 get_addr_name(const address *addr)
2997 const gchar *result;
2999 result = solve_address_to_name(addr);
3004 /* if it gets here, either it is of type AT_NONE, */
3005 /* or it should be solvable in address_to_str -unless addr->type is wrongly defined */
3007 if (addr->type == AT_NONE){
3011 /* We need an ephemeral allocated string */
3012 return ep_address_to_str(addr);
3016 se_get_addr_name(const address *addr)
3018 const gchar *result;
3020 result = se_solve_address_to_name(addr);
3025 /* if it gets here, either it is of type AT_NONE, */
3026 /* or it should be solvable in se_address_to_str -unless addr->type is wrongly defined */
3028 if (addr->type == AT_NONE){
3032 /* We need a "permanently" allocated string */
3033 return se_address_to_str(addr);
3037 get_addr_name_buf(const address *addr, gchar *buf, gsize size)
3039 const gchar *result = get_addr_name(addr);
3041 g_strlcpy(buf, result, size);
3042 } /* get_addr_name_buf */
3046 get_ether_name(const guint8 *addr)
3049 gboolean resolve = gbl_resolv_flags.mac_name;
3051 tp = eth_name_lookup(addr, resolve);
3053 return resolve ? tp->resolved_name : tp->hexaddr;
3055 } /* get_ether_name */
3057 /* Look for a (non-dummy) ether name in the hash, and return it if found.
3058 * If it's not found, simply return NULL.
3061 get_ether_name_if_known(const guint8 *addr)
3065 /* Initialize ether structs if we're the first
3066 * ether-related function called */
3067 if (!gbl_resolv_flags.mac_name)
3070 /* eth_name_lookup will create a (resolved) hash entry if it doesn't exist */
3071 tp = eth_name_lookup(addr, TRUE);
3072 g_assert(tp != NULL);
3074 if (tp->status == HASHETHER_STATUS_RESOLVED_NAME) {
3075 /* Name is from an ethers file (or is a "well-known" MAC address name from the manuf file) */
3076 return tp->resolved_name;
3079 /* Name was created */
3085 get_ether_addr(const gchar *name)
3088 /* force resolution (do not check gbl_resolv_flags) */
3089 return eth_addr_lookup(name);
3091 } /* get_ether_addr */
3094 add_ether_byip(const guint ip, const guint8 *eth)
3099 /* first check that IP address can be resolved */
3100 if (!gbl_resolv_flags.network_name)
3103 tp = host_lookup(ip, &found);
3105 /* ok, we can add this entry in the ethers hashtable */
3106 add_eth_name(eth, tp->name);
3109 } /* add_ether_byip */
3112 get_ipxnet_name(const guint32 addr)
3115 if (!gbl_resolv_flags.network_name) {
3116 return ipxnet_to_str_punct(addr, '\0');
3119 return ipxnet_name_lookup(addr);
3121 } /* get_ipxnet_name */
3124 get_ipxnet_addr(const gchar *name, gboolean *known)
3129 /* force resolution (do not check gbl_resolv_flags) */
3130 addr = ipxnet_addr_lookup(name, &success);
3135 } /* get_ipxnet_addr */
3138 get_manuf_name(const guint8 *addr)
3144 /* manuf needs only the 3 most significant octets of the ethernet address */
3145 manuf_key = addr[0];
3146 manuf_key = manuf_key<<8;
3148 manuf_key = manuf_key | oct;
3149 manuf_key = manuf_key<<8;
3151 manuf_key = manuf_key | oct;
3153 if (!gbl_resolv_flags.mac_name || ((cur = (gchar *)g_hash_table_lookup(manuf_hashtable, &manuf_key)) == NULL)) {
3154 cur=ep_strdup_printf("%02x:%02x:%02x", addr[0], addr[1], addr[2]);
3160 } /* get_manuf_name */
3163 uint_get_manuf_name(const guint oid)
3167 addr[0] = (oid >> 16) & 0xFF;
3168 addr[1] = (oid >> 8) & 0xFF;
3169 addr[2] = (oid >> 0) & 0xFF;
3170 return get_manuf_name(addr);
3174 tvb_get_manuf_name(tvbuff_t *tvb, gint offset)
3176 return get_manuf_name(tvb_get_ptr(tvb, offset, 3));
3180 get_manuf_name_if_known(const guint8 *addr)
3186 /* manuf needs only the 3 most significant octets of the ethernet address */
3187 manuf_key = addr[0];
3188 manuf_key = manuf_key<<8;
3190 manuf_key = manuf_key | oct;
3191 manuf_key = manuf_key<<8;
3193 manuf_key = manuf_key | oct;
3195 if ((cur = (gchar *)g_hash_table_lookup(manuf_hashtable, &manuf_key)) == NULL) {
3201 } /* get_manuf_name_if_known */
3204 uint_get_manuf_name_if_known(const guint manuf_key)
3208 if ((cur = (gchar *)g_hash_table_lookup(manuf_hashtable, &manuf_key)) == NULL) {
3216 tvb_get_manuf_name_if_known(tvbuff_t *tvb, gint offset)
3218 return get_manuf_name_if_known(tvb_get_ptr(tvb, offset, 3));
3222 get_eui64_name(const guint64 addr_eui64)
3225 guint8 *addr = (guint8 *)ep_alloc(8);
3227 /* Copy and convert the address to network byte order. */
3228 *(guint64 *)(void *)(addr) = pntoh64(&(addr_eui64));
3230 if (!gbl_resolv_flags.mac_name || ((name = manuf_name_lookup(addr)) == NULL)) {
3231 cur=ep_strdup_printf("%02x:%02x:%02x%02x:%02x:%02x%02x:%02x", addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7]);
3234 cur=ep_strdup_printf("%s_%02x:%02x:%02x:%02x:%02x", name, addr[3], addr[4], addr[5], addr[6], addr[7]);
3237 } /* get_eui64_name */
3241 get_eui64_name_if_known(const guint64 addr_eui64)
3244 guint8 *addr = (guint8 *)ep_alloc(8);
3246 /* Copy and convert the address to network byte order. */
3247 *(guint64 *)(void *)(addr) = pntoh64(&(addr_eui64));
3249 if ((name = manuf_name_lookup(addr)) == NULL) {
3253 cur=ep_strdup_printf("%s_%02x:%02x:%02x:%02x:%02x", name, addr[3], addr[4], addr[5], addr[6], addr[7]);
3256 } /* get_eui64_name_if_known */
3259 #define GHI_TIMEOUT (250 * 1000)
3264 #if ( ( ARES_VERSION_MAJOR < 1 ) \
3265 || ( 1 == ARES_VERSION_MAJOR && ARES_VERSION_MINOR < 5 ) )
3274 * XXX - If we wanted to be really fancy we could cache results here and
3275 * look them up in get_host_ipaddr* below.
3277 async_hostent_t *ahp = (async_hostent_t *)arg;
3278 if (status == ARES_SUCCESS && hp && ahp && hp->h_length == ahp->addr_size) {
3279 memcpy(ahp->addrp, hp->h_addr, hp->h_length);
3280 ahp->copied = hp->h_length;
3283 #endif /* HAVE_C_ARES */
3285 /* Translate a string, assumed either to be a dotted-quad IP address or
3286 * a host name, to a numeric IP address. Return TRUE if we succeed and
3287 * set "*addrp" to that numeric IP address; return FALSE if we fail.
3288 * Used more in the dfilter parser rather than in packet dissectors */
3290 get_host_ipaddr(const char *host, guint32 *addrp)
3292 struct in_addr ipaddr;
3294 struct timeval tv = { 0, GHI_TIMEOUT }, *tvp;
3297 async_hostent_t ahe;
3298 #else /* HAVE_C_ARES */
3300 #endif /* HAVE_C_ARES */
3303 * don't change it to inet_pton(AF_INET), they are not 100% compatible.
3304 * inet_pton(AF_INET) does not support hexadecimal notation nor
3305 * less-than-4 octet notation.
3307 if (!inet_aton(host, &ipaddr)) {
3309 /* It's not a valid dotted-quad IP address; is it a valid
3313 /* If we're not allowed to do name resolution, don't do name
3316 if (!gbl_resolv_flags.network_name ||
3317 !gbl_resolv_flags.use_external_net_name_resolver) {
3322 if (! (gbl_resolv_flags.concurrent_dns) ||
3323 name_resolve_concurrency < 1 ||
3324 ! async_dns_initialized) {
3327 ahe.addr_size = (int) sizeof (struct in_addr);
3330 ares_gethostbyname(ghbn_chan, host, AF_INET, c_ares_ghi_cb, &ahe);
3333 nfds = ares_fds(ghbn_chan, &rfds, &wfds);
3335 tvp = ares_timeout(ghbn_chan, &tv, &tv);
3336 if (select(nfds, &rfds, &wfds, NULL, tvp) == -1) { /* call to select() failed */
3337 fprintf(stderr, "Warning: call to select() failed, error is %s\n", strerror(errno));
3340 ares_process(ghbn_chan, &rfds, &wfds);
3342 ares_cancel(ghbn_chan);
3343 if (ahe.addr_size == ahe.copied) {
3347 #else /* ! HAVE_C_ARES */
3348 hp = gethostbyname(host);
3352 /* Apparently, some versions of gethostbyaddr can
3353 * return IPv6 addresses. */
3354 } else if (hp->h_length <= (int) sizeof (struct in_addr)) {
3355 memcpy(&ipaddr, hp->h_addr, hp->h_length);
3359 #endif /* HAVE_C_ARES */
3361 /* Does the string really contain dotted-quad IP?
3362 * Check against inet_atons that accept strings such as
3363 * "130.230" as valid addresses and try to convert them
3364 * to some form of a classful (host.net) notation.
3366 unsigned int a0, a1, a2, a3;
3367 if (sscanf(host, "%u.%u.%u.%u", &a0, &a1, &a2, &a3) != 4)
3371 *addrp = ipaddr.s_addr;
3376 * Translate IPv6 numeric address or FQDN hostname, into binary IPv6 address.
3377 * Return TRUE if we succeed and set "*addrp" to that numeric IP address;
3378 * return FALSE if we fail.
3381 get_host_ipaddr6(const char *host, struct e_in6_addr *addrp)
3384 struct timeval tv = { 0, GHI_TIMEOUT }, *tvp;
3387 async_hostent_t ahe;
3388 #elif defined(HAVE_GETHOSTBYNAME2)
3390 #endif /* HAVE_C_ARES */
3392 if (inet_pton(AF_INET6, host, addrp) > 0)
3395 /* It's not a valid dotted-quad IP address; is it a valid
3399 /* If we're not allowed to do name resolution, don't do name
3402 if (!gbl_resolv_flags.network_name ||
3403 !gbl_resolv_flags.use_external_net_name_resolver) {
3409 if (! (gbl_resolv_flags.concurrent_dns) ||
3410 name_resolve_concurrency < 1 ||
3411 ! async_dns_initialized) {
3414 ahe.addr_size = (int) sizeof (struct e_in6_addr);
3417 ares_gethostbyname(ghbn_chan, host, AF_INET6, c_ares_ghi_cb, &ahe);
3420 nfds = ares_fds(ghbn_chan, &rfds, &wfds);
3422 tvp = ares_timeout(ghbn_chan, &tv, &tv);
3423 if (select(nfds, &rfds, &wfds, NULL, tvp) == -1) { /* call to select() failed */
3424 fprintf(stderr, "Warning: call to select() failed, error is %s\n", strerror(errno));
3427 ares_process(ghbn_chan, &rfds, &wfds);
3429 ares_cancel(ghbn_chan);
3430 if (ahe.addr_size == ahe.copied) {
3433 #elif defined(HAVE_GETHOSTBYNAME2)
3434 hp = gethostbyname2(host, AF_INET6);
3435 if (hp != NULL && hp->h_length == sizeof(struct e_in6_addr)) {
3436 memcpy(addrp, hp->h_addr, hp->h_length);
3445 * Find out whether a hostname resolves to an ip or ipv6 address
3446 * Return "ip6" if it is IPv6, "ip" otherwise (including the case
3447 * that we don't know)
3449 const char* host_ip_af(const char *host
3450 #ifndef HAVE_GETHOSTBYNAME2
3455 #ifdef HAVE_GETHOSTBYNAME2
3457 return (h = gethostbyname2(host, AF_INET6)) && h->h_addrtype == AF_INET6 ? "ip6" : "ip";
3464 get_manuf_hashtable(void)
3466 return manuf_hashtable;
3470 get_wka_hashtable(void)
3472 return wka_hashtable;
3476 get_eth_hashtable(void)
3478 return eth_hashtable;
3482 get_serv_port_hashtable(void)
3484 return serv_port_hashtable;
3488 get_ipxnet_hash_table(void)
3490 return ipxnet_hash_table;
3494 get_ipv4_hash_table(void)
3496 return ipv4_hash_table;
3500 get_ipv6_hash_table(void)
3502 return ipv6_hash_table;
3504 /* Initialize all the address resolution subsystems in this file */
3506 addr_resolv_init(void)
3508 initialize_services();
3509 initialize_ethers();
3510 initialize_ipxnets();
3511 /* host name initialization is done on a per-capture-file basis */
3512 /*host_name_lookup_init();*/
3515 /* Clean up all the address resolution subsystems in this file */
3517 addr_resolv_cleanup(void)
3519 service_name_lookup_cleanup();
3520 eth_name_lookup_cleanup();
3521 ipx_name_lookup_cleanup();
3522 /* host name initialization is done on a per-capture-file basis */
3523 /*host_name_lookup_cleanup();*/
3527 * Editor modelines - http://www.wireshark.org/tools/modelines.html
3532 * indent-tabs-mode: nil
3535 * vi: set shiftwidth=4 tabstop=8 expandtab:
3536 * :indentSize=4:tabSize=8:noTabs=true: