forked from wireshark/wireshark
-
Notifications
You must be signed in to change notification settings - Fork 0
/
addr_resolv.c
3735 lines (3096 loc) · 102 KB
/
addr_resolv.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* addr_resolv.c
* Routines for network object lookup
*
* Laurent Deniel <laurent.deniel@free.fr>
*
* Add option to resolv VLAN ID to describing name
* Uli Heilmeier, March 2016
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <wsutil/strtoi.h>
/*
* Win32 doesn't have SIGALRM (and it's the OS where name lookup calls
* are most likely to take a long time, given the way address-to-name
* lookups are done over NBNS).
*
* macOS does have SIGALRM, but if you longjmp() out of a name resolution
* call in a signal handler, you might crash, because the state of the
* resolution code that sends messages to lookupd might be inconsistent
* if you jump out of it in middle of a call.
*
* There's no guarantee that longjmp()ing out of name resolution calls
* will work on *any* platform; OpenBSD got rid of the alarm/longjmp
* code in tcpdump, to avoid those sorts of problems, and that was
* picked up by tcpdump.org tcpdump.
*
* So, for now, we do not use alarm() and SIGALRM to time out host name
* lookups. If we get a lot of complaints about lookups taking a long time,
* we can reconsider that decision. (Note that tcpdump originally added
* such a timeout mechanism that for the benefit of systems using NIS to
* look up host names; that might now be fixed in NIS implementations, for
* those sites still using NIS rather than DNS for that.... tcpdump no
* longer does that, for the same reasons that we don't.)
*
* If we're using an asynchronous DNS resolver, that shouldn't be an issue.
* If we're using a synchronous name lookup mechanism (which we'd do mainly
* to support resolving addresses and host names using more mechanisms than
* just DNS, such as NIS, NBNS, or Mr. Hosts File), we could do that in
* a separate thread, making it, in effect, asynchronous.
*/
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h> /* needed to define AF_ values on UNIX */
#endif
#ifdef _WIN32
#include <winsock2.h> /* needed to define AF_ values on Windows */
#include <ws2tcpip.h>
#endif
#ifdef HAVE_C_ARES
# ifdef _WIN32
# define socklen_t unsigned int
# endif
# include <ares.h>
# include <ares_version.h>
#endif /* HAVE_C_ARES */
#include <glib.h>
#include "packet.h"
#include "addr_and_mask.h"
#include "ipv6.h"
#include "addr_resolv.h"
#include "wsutil/filesystem.h"
#include <wsutil/report_message.h>
#include <wsutil/file_util.h>
#include <wsutil/pint.h>
#include <wsutil/inet_addr.h>
#include <epan/strutil.h>
#include <epan/to_str-int.h>
#include <epan/maxmind_db.h>
#include <epan/prefs.h>
#include <epan/uat.h>
#define ENAME_HOSTS "hosts"
#define ENAME_SUBNETS "subnets"
#define ENAME_ETHERS "ethers"
#define ENAME_IPXNETS "ipxnets"
#define ENAME_MANUF "manuf"
#define ENAME_WKA "wka"
#define ENAME_SERVICES "services"
#define ENAME_VLANS "vlans"
#define ENAME_SS7PCS "ss7pcs"
#define ENAME_ENTERPRISES "enterprises.tsv"
#define HASHETHSIZE 2048
#define HASHHOSTSIZE 2048
#define HASHIPXNETSIZE 256
#define SUBNETLENGTHSIZE 32 /*1-32 inc.*/
/* hash table used for IPv4 lookup */
#define HASH_IPV4_ADDRESS(addr) (g_htonl(addr) & (HASHHOSTSIZE - 1))
typedef struct sub_net_hashipv4 {
guint addr;
/* XXX: No longer needed?*/
guint8 flags; /* B0 dummy_entry, B1 resolve, B2 If the address is used in the trace */
struct sub_net_hashipv4 *next;
gchar name[MAXNAMELEN];
} sub_net_hashipv4_t;
/* Array of entries of subnets of different lengths */
typedef struct {
gsize mask_length; /*1-32*/
guint32 mask; /* e.g. 255.255.255.*/
sub_net_hashipv4_t** subnet_addresses; /* Hash table of subnet addresses */
} subnet_length_entry_t;
/* hash table used for IPX network lookup */
/* XXX - check goodness of hash function */
#define HASH_IPX_NET(net) ((net) & (HASHIPXNETSIZE - 1))
typedef struct hashipxnet {
guint addr;
struct hashipxnet *next;
gchar name[MAXNAMELEN];
} hashipxnet_t;
typedef struct hashvlan {
guint id;
/* struct hashvlan *next; */
gchar name[MAXVLANNAMELEN];
} hashvlan_t;
typedef struct ss7pc {
guint32 id; /* 1st byte NI, 3 following bytes: Point Code */
gchar pc_addr[MAXNAMELEN];
gchar name[MAXNAMELEN];
} hashss7pc_t;
/* hash tables used for ethernet and manufacturer lookup */
#define HASHETHER_STATUS_UNRESOLVED 1
#define HASHETHER_STATUS_RESOLVED_DUMMY 2
#define HASHETHER_STATUS_RESOLVED_NAME 3
struct hashether {
guint status; /* (See above) */
guint8 addr[6];
char hexaddr[6*3];
char resolved_name[MAXNAMELEN];
};
struct hashmanuf {
guint status; /* (See above) */
guint8 addr[3];
char hexaddr[3*3];
char resolved_name[MAXNAMELEN];
char resolved_longname[MAXNAMELEN];
};
/* internal ethernet type */
typedef struct _ether
{
guint8 addr[6];
char name[MAXNAMELEN];
char longname[MAXNAMELEN];
} ether_t;
/* internal ipxnet type */
typedef struct _ipxnet
{
guint addr;
char name[MAXNAMELEN];
} ipxnet_t;
/* internal vlan type */
typedef struct _vlan
{
guint id;
char name[MAXVLANNAMELEN];
} vlan_t;
// Maps guint -> hashipxnet_t*
static wmem_map_t *ipxnet_hash_table = NULL;
static wmem_map_t *ipv4_hash_table = NULL;
static wmem_map_t *ipv6_hash_table = NULL;
// Maps guint -> hashvlan_t*
static wmem_map_t *vlan_hash_table = NULL;
static wmem_map_t *ss7pc_hash_table = NULL;
static wmem_list_t *manually_resolved_ipv4_list = NULL;
static wmem_list_t *manually_resolved_ipv6_list = NULL;
typedef struct _resolved_ipv4
{
guint32 host_addr;
char name[MAXNAMELEN];
} resolved_ipv4_t;
typedef struct _resolved_ipv6
{
ws_in6_addr ip6_addr;
char name[MAXNAMELEN];
} resolved_ipv6_t;
static addrinfo_lists_t addrinfo_lists = { NULL, NULL};
struct cb_serv_data {
gchar *service;
port_type proto;
};
// Maps guint -> hashmanuf_t*
static wmem_map_t *manuf_hashtable = NULL;
static wmem_map_t *wka_hashtable = NULL;
static wmem_map_t *eth_hashtable = NULL;
// Maps guint -> serv_port_t*
static wmem_map_t *serv_port_hashtable = NULL;
static GHashTable *enterprises_hashtable = NULL;
static subnet_length_entry_t subnet_length_entries[SUBNETLENGTHSIZE]; /* Ordered array of entries */
static gboolean have_subnet_entry = FALSE;
static gboolean new_resolved_objects = FALSE;
static GPtrArray* extra_hosts_files = NULL;
static hashether_t *add_eth_name(const guint8 *addr, const gchar *name);
static void add_serv_port_cb(const guint32 port, gpointer ptr);
/* http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx#existing
* One-at-a-Time hash
*/
guint
ipv6_oat_hash(gconstpointer key)
{
int len = 16;
const unsigned char *p = (const unsigned char *)key;
guint h = 0;
int i;
for ( i = 0; i < len; i++ ) {
h += p[i];
h += ( h << 10 );
h ^= ( h >> 6 );
}
h += ( h << 3 );
h ^= ( h >> 11 );
h += ( h << 15 );
return h;
}
gboolean
ipv6_equal(gconstpointer v1, gconstpointer v2)
{
if (memcmp(v1, v2, sizeof (ws_in6_addr)) == 0) {
return TRUE;
}
return FALSE;
}
/*
* Flag controlling what names to resolve.
*/
e_addr_resolve gbl_resolv_flags = {
TRUE, /* mac_name */
FALSE, /* network_name */
FALSE, /* transport_name */
TRUE, /* dns_pkt_addr_resolution */
TRUE, /* use_external_net_name_resolver */
FALSE, /* load_hosts_file_from_profile_only */
FALSE, /* vlan_name */
FALSE /* ss7 point code names */
};
#ifdef HAVE_C_ARES
static guint name_resolve_concurrency = 500;
static gboolean resolve_synchronously = FALSE;
#endif
/*
* Global variables (can be changed in GUI sections)
* XXX - they could be changed in GUI code, but there's currently no
* GUI code to change them.
*/
gchar *g_ethers_path = NULL; /* global ethers file */
gchar *g_pethers_path = NULL; /* personal ethers file */
gchar *g_wka_path = NULL; /* global well-known-addresses file */
gchar *g_manuf_path = NULL; /* global manuf file */
gchar *g_ipxnets_path = NULL; /* global ipxnets file */
gchar *g_pipxnets_path = NULL; /* personal ipxnets file */
gchar *g_services_path = NULL; /* global services file */
gchar *g_pservices_path = NULL; /* personal services file */
gchar *g_pvlan_path = NULL; /* personal vlans file */
gchar *g_ss7pcs_path = NULL; /* personal ss7pcs file */
gchar *g_enterprises_path = NULL; /* global enterprises file */
gchar *g_penterprises_path = NULL; /* personal enterprises file */
/* first resolving call */
/* c-ares */
#ifdef HAVE_C_ARES
/*
* Submitted asynchronous queries trigger a callback (c_ares_ghba_cb()).
* Queries are added to c_ares_queue_head. During processing, queries are
* popped off the front of c_ares_queue_head and submitted using
* ares_gethostbyaddr().
* The callback processes the response, then frees the request.
*/
typedef struct _async_dns_queue_msg
{
union {
guint32 ip4;
ws_in6_addr ip6;
} addr;
int family;
} async_dns_queue_msg_t;
typedef struct _async_hostent {
int addr_size;
int copied;
void *addrp;
} async_hostent_t;
/*
* Submitted synchronous queries trigger a callback (c_ares_ghba_sync_cb()).
* The callback processes the response, sets completed to TRUE if
* completed is non-NULL, then frees the request.
*/
typedef struct _sync_dns_data
{
union {
guint32 ip4;
ws_in6_addr ip6;
} addr;
int family;
gboolean *completed;
} sync_dns_data_t;
static ares_channel ghba_chan; /* ares_gethostbyaddr -- Usually non-interactive, no timeout */
static ares_channel ghbn_chan; /* ares_gethostbyname -- Usually interactive, timeout */
static gboolean async_dns_initialized = FALSE;
static guint async_dns_in_flight = 0;
static wmem_list_t *async_dns_queue_head = NULL;
//UAT for providing a list of DNS servers to C-ARES for name resolution
gboolean use_custom_dns_server_list = FALSE;
struct dns_server_data {
char *ipaddr;
};
UAT_CSTRING_CB_DEF(dnsserverlist_uats, ipaddr, struct dns_server_data)
static uat_t *dnsserver_uat = NULL;
static struct dns_server_data *dnsserverlist_uats = NULL;
static guint ndnsservers = 0;
static void
dns_server_free_cb(void *data)
{
struct dns_server_data *h = (struct dns_server_data*)data;
g_free(h->ipaddr);
}
static void*
dns_server_copy_cb(void *dst_, const void *src_, size_t len _U_)
{
const struct dns_server_data *src = (const struct dns_server_data *)src_;
struct dns_server_data *dst = (struct dns_server_data *)dst_;
dst->ipaddr = g_strdup(src->ipaddr);
return dst;
}
static gboolean
dnsserver_uat_fld_ip_chk_cb(void* r _U_, const char* ipaddr, guint len _U_, const void* u1 _U_, const void* u2 _U_, char** err)
{
//Check for a valid IPv4 or IPv6 address.
if (ipaddr && g_hostname_is_ip_address(ipaddr)) {
*err = NULL;
return TRUE;
}
*err = g_strdup_printf("No valid IP address given.");
return FALSE;
}
static void
c_ares_ghba_sync_cb(void *arg, int status, int timeouts _U_, struct hostent *he) {
sync_dns_data_t *sdd = (sync_dns_data_t *)arg;
char **p;
if (status == ARES_SUCCESS) {
for (p = he->h_addr_list; *p != NULL; p++) {
switch(sdd->family) {
case AF_INET:
add_ipv4_name(sdd->addr.ip4, he->h_name);
break;
case AF_INET6:
add_ipv6_name(&sdd->addr.ip6, he->h_name);
break;
default:
/* Throw an exception? */
break;
}
}
}
/*
* Let our caller know that this is complete.
*/
*sdd->completed = TRUE;
/*
* Free the structure for this call.
*/
g_free(sdd);
}
static void
wait_for_sync_resolv(gboolean *completed) {
int nfds;
fd_set rfds, wfds;
struct timeval tv;
while (!*completed) {
/*
* Not yet resolved; wait for something to show up on the
* address-to-name C-ARES channel.
*
* To quote the source code for ares_timeout() as of C-ARES
* 1.12.0, "WARNING: Beware that this is linear in the number
* of outstanding requests! You are probably far better off
* just calling ares_process() once per second, rather than
* calling ares_timeout() to figure out when to next call
* ares_process().", although we should have only one request
* outstanding.
*
* And, yes, we have to reset it each time, as select(), in
* some OSes modifies the timeout to reflect the time remaining
* (e.g., Linux) and select() in other OSes doesn't (most if not
* all other UN*Xes, Windows?), so we can't rely on *either*
* behavior.
*/
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
nfds = ares_fds(ghba_chan, &rfds, &wfds);
if (nfds > 0) {
if (select(nfds, &rfds, &wfds, NULL, &tv) == -1) { /* call to select() failed */
/* If it's interrupted by a signal, no need to put out a message */
if (errno != EINTR)
fprintf(stderr, "Warning: call to select() failed, error is %s\n", g_strerror(errno));
return;
}
ares_process(ghba_chan, &rfds, &wfds);
}
}
}
static void
sync_lookup_ip4(const guint32 addr)
{
gboolean completed = FALSE;
sync_dns_data_t *sdd;
if (!async_dns_initialized) {
/*
* c-ares not initialized. Bail out.
*/
return;
}
/*
* Start the request.
*/
sdd = g_new(sync_dns_data_t, 1);
sdd->family = AF_INET;
sdd->addr.ip4 = addr;
sdd->completed = &completed;
ares_gethostbyaddr(ghba_chan, &addr, sizeof(guint32), AF_INET,
c_ares_ghba_sync_cb, sdd);
/*
* Now wait for it to finish.
*/
wait_for_sync_resolv(&completed);
}
static void
sync_lookup_ip6(const ws_in6_addr *addr)
{
gboolean completed = FALSE;
sync_dns_data_t *sdd;
if (!async_dns_initialized) {
/*
* c-ares not initialized. Bail out.
*/
return;
}
/*
* Start the request.
*/
sdd = g_new(sync_dns_data_t, 1);
sdd->family = AF_INET6;
memcpy(&sdd->addr.ip6, addr, sizeof(sdd->addr.ip6));
sdd->completed = &completed;
ares_gethostbyaddr(ghba_chan, &addr, sizeof(ws_in6_addr), AF_INET6,
c_ares_ghba_sync_cb, sdd);
/*
* Now wait for it to finish.
*/
wait_for_sync_resolv(&completed);
}
void
set_resolution_synchrony(gboolean synchronous)
{
resolve_synchronously = synchronous;
}
static void
c_ares_set_dns_servers(void)
{
if ((!async_dns_initialized) || (!use_custom_dns_server_list))
return;
if (ndnsservers == 0) {
//clear the list of servers. This may effectively disable name resolution
ares_set_servers(ghba_chan, NULL);
ares_set_servers(ghbn_chan, NULL);
} else {
struct ares_addr_node* servers = wmem_alloc_array(NULL, struct ares_addr_node, ndnsservers);
ws_in4_addr ipv4addr;
ws_in6_addr ipv6addr;
gboolean invalid_IP_found = FALSE;
struct ares_addr_node* server;
guint i;
for (i = 0, server = servers; i < ndnsservers-1; i++, server++) {
if (ws_inet_pton6(dnsserverlist_uats[i].ipaddr, &ipv6addr)) {
server->family = AF_INET6;
memcpy(&server->addr.addr6, &ipv6addr, 16);
} else if (ws_inet_pton4(dnsserverlist_uats[i].ipaddr, &ipv4addr)) {
server->family = AF_INET;
memcpy(&server->addr.addr4, &ipv4addr, 4);
} else {
//This shouldn't happen, but just in case...
invalid_IP_found = TRUE;
server->family = 0;
memset(&server->addr.addr4, 0, 4);
break;
}
server->next = (server+1);
}
if (!invalid_IP_found) {
if (ws_inet_pton6(dnsserverlist_uats[i].ipaddr, &ipv6addr)) {
server->family = AF_INET6;
memcpy(&server->addr.addr6, &ipv6addr, 16);
}
else if (ws_inet_pton4(dnsserverlist_uats[i].ipaddr, &ipv4addr)) {
server->family = AF_INET;
memcpy(&server->addr.addr4, &ipv4addr, 4);
} else {
//This shouldn't happen, but just in case...
server->family = 0;
memset(&server->addr.addr4, 0, 4);
}
}
server->next = NULL;
ares_set_servers(ghba_chan, servers);
ares_set_servers(ghbn_chan, servers);
wmem_free(NULL, servers);
}
}
#else
void
set_resolution_synchrony(gboolean synchronous _U_)
{
/* Nothing to set. */
}
#endif /* HAVE_C_ARES */
typedef struct {
guint32 mask;
gsize mask_length;
const gchar* name; /* Shallow copy */
} subnet_entry_t;
/* Maximum supported line length of hosts, services, manuf, etc. */
#define MAX_LINELEN 1024
/** Read a line without trailing (CR)LF. Returns -1 on failure. */
static int
fgetline(char *buf, int size, FILE *fp)
{
if (fgets(buf, size, fp)) {
int len = (int)strcspn(buf, "\r\n");
buf[len] = '\0';
return len;
}
return -1;
} /* fgetline */
/*
* Local function definitions
*/
static subnet_entry_t subnet_lookup(const guint32 addr);
static void subnet_entry_set(guint32 subnet_addr, const guint8 mask_length, const gchar* name);
static void
add_service_name(port_type proto, const guint port, const char *service_name)
{
serv_port_t *serv_port_table;
serv_port_table = (serv_port_t *)wmem_map_lookup(serv_port_hashtable, GUINT_TO_POINTER(port));
if (serv_port_table == NULL) {
serv_port_table = wmem_new0(wmem_epan_scope(), serv_port_t);
wmem_map_insert(serv_port_hashtable, GUINT_TO_POINTER(port), serv_port_table);
}
switch(proto) {
case PT_TCP:
wmem_free(wmem_epan_scope(), serv_port_table->tcp_name);
serv_port_table->tcp_name = wmem_strdup(wmem_epan_scope(), service_name);
break;
case PT_UDP:
wmem_free(wmem_epan_scope(), serv_port_table->udp_name);
serv_port_table->udp_name = wmem_strdup(wmem_epan_scope(), service_name);
break;
case PT_SCTP:
wmem_free(wmem_epan_scope(), serv_port_table->sctp_name);
serv_port_table->sctp_name = wmem_strdup(wmem_epan_scope(), service_name);
break;
case PT_DCCP:
wmem_free(wmem_epan_scope(), serv_port_table->dccp_name);
serv_port_table->dccp_name = wmem_strdup(wmem_epan_scope(), service_name);
break;
default:
return;
/* Should not happen */
}
new_resolved_objects = TRUE;
}
static void
parse_service_line (char *line)
{
gchar *cp;
gchar *service;
gchar *port;
port_type proto;
struct cb_serv_data cb_data;
range_t *port_rng = NULL;
if ((cp = strchr(line, '#')))
*cp = '\0';
if ((cp = strtok(line, " \t")) == NULL)
return;
service = cp;
if ((cp = strtok(NULL, " \t")) == NULL)
return;
port = cp;
if (strtok(cp, "/") == NULL)
return;
if (range_convert_str(NULL, &port_rng, port, G_MAXUINT16) != CVT_NO_ERROR) {
wmem_free (NULL, port_rng);
return;
}
while ((cp = strtok(NULL, "/")) != NULL) {
if (strcmp(cp, "tcp") == 0) {
proto = PT_TCP;
}
else if (strcmp(cp, "udp") == 0) {
proto = PT_UDP;
}
else if (strcmp(cp, "sctp") == 0) {
proto = PT_SCTP;
}
else if (strcmp(cp, "dccp") == 0) {
proto = PT_DCCP;
}
else {
break;
}
cb_data.service = service;
cb_data.proto = proto;
range_foreach(port_rng, add_serv_port_cb, &cb_data);
}
wmem_free (NULL, port_rng);
} /* parse_service_line */
static void
add_serv_port_cb(const guint32 port, gpointer ptr)
{
struct cb_serv_data *cb_data = (struct cb_serv_data *)ptr;
if ( port ) {
add_service_name(cb_data->proto, port, cb_data->service);
}
}
static gboolean
parse_services_file(const char * path)
{
FILE *serv_p;
char buf[MAX_LINELEN];
/* services hash table initialization */
serv_p = ws_fopen(path, "r");
if (serv_p == NULL)
return FALSE;
while (fgetline(buf, sizeof(buf), serv_p) >= 0) {
parse_service_line(buf);
}
fclose(serv_p);
return TRUE;
}
/* -----------------
* unsigned integer to ascii
*/
static gchar *
wmem_utoa(wmem_allocator_t *allocator, guint port)
{
gchar *bp = (gchar *)wmem_alloc(allocator, MAXNAMELEN);
/* XXX, guint32_to_str() ? */
guint32_to_str_buf(port, bp, MAXNAMELEN);
return bp;
}
static const gchar *
_serv_name_lookup(port_type proto, guint port, serv_port_t **value_ret)
{
serv_port_t *serv_port_table;
serv_port_table = (serv_port_t *)wmem_map_lookup(serv_port_hashtable, GUINT_TO_POINTER(port));
if (value_ret != NULL)
*value_ret = serv_port_table;
if (serv_port_table == NULL)
return NULL;
switch (proto) {
case PT_UDP:
return serv_port_table->udp_name;
case PT_TCP:
return serv_port_table->tcp_name;
case PT_SCTP:
return serv_port_table->sctp_name;
case PT_DCCP:
return serv_port_table->dccp_name;
default:
break;
}
return NULL;
}
const gchar *
try_serv_name_lookup(port_type proto, guint port)
{
return _serv_name_lookup(proto, port, NULL);
}
const gchar *
serv_name_lookup(port_type proto, guint port)
{
serv_port_t *serv_port_table = NULL;
const char *name;
name = _serv_name_lookup(proto, port, &serv_port_table);
if (name != NULL)
return name;
if (serv_port_table == NULL) {
serv_port_table = wmem_new0(wmem_epan_scope(), serv_port_t);
wmem_map_insert(serv_port_hashtable, GUINT_TO_POINTER(port), serv_port_table);
}
if (serv_port_table->numeric == NULL) {
serv_port_table->numeric = wmem_strdup_printf(wmem_epan_scope(), "%u", port);
}
return serv_port_table->numeric;
}
static void
initialize_services(void)
{
gboolean parse_file = TRUE;
g_assert(serv_port_hashtable == NULL);
serv_port_hashtable = wmem_map_new(wmem_epan_scope(), g_direct_hash, g_direct_equal);
/* Compute the pathname of the services file. */
if (g_services_path == NULL) {
g_services_path = get_datafile_path(ENAME_SERVICES);
}
parse_services_file(g_services_path);
/* Compute the pathname of the personal services file */
if (g_pservices_path == NULL) {
/* Check profile directory before personal configuration */
g_pservices_path = get_persconffile_path(ENAME_SERVICES, TRUE);
if (!parse_services_file(g_pservices_path)) {
g_free(g_pservices_path);
g_pservices_path = get_persconffile_path(ENAME_SERVICES, FALSE);
} else {
parse_file = FALSE;
}
}
if (parse_file) {
parse_services_file(g_pservices_path);
}
}
static void
service_name_lookup_cleanup(void)
{
serv_port_hashtable = NULL;
g_free(g_services_path);
g_services_path = NULL;
g_free(g_pservices_path);
g_pservices_path = NULL;
}
static void
parse_enterprises_line (char *line)
{
char *tok, *dec_str, *org_str;
guint32 dec;
if ((tok = strchr(line, '#')))
*tok = '\0';
dec_str = strtok(line, " \t");
if (!dec_str)
return;
org_str = strtok(NULL, ""); /* everything else */
if (org_str)
org_str = g_strstrip(org_str);
if (!org_str)
return;
if (!ws_strtou32(dec_str, NULL, &dec))
return;
g_hash_table_replace(enterprises_hashtable, GUINT_TO_POINTER(dec), g_strdup(org_str));
}
static gboolean
parse_enterprises_file(const char * path)
{
FILE *fp;
char buf[MAX_LINELEN];
fp = ws_fopen(path, "r");
if (fp == NULL)
return FALSE;
while (fgetline(buf, sizeof(buf), fp) >= 0) {
parse_enterprises_line(buf);
}
fclose(fp);
return TRUE;
}
static void
initialize_enterprises(void)
{
g_assert(enterprises_hashtable == NULL);
enterprises_hashtable = g_hash_table_new_full(NULL, NULL, NULL, g_free);
if (g_enterprises_path == NULL) {
g_enterprises_path = get_datafile_path(ENAME_ENTERPRISES);
}
parse_enterprises_file(g_enterprises_path);
if (g_penterprises_path == NULL) {
g_penterprises_path = get_persconffile_path(ENAME_ENTERPRISES, FALSE);
}
parse_enterprises_file(g_penterprises_path);
}
const gchar *
try_enterprises_lookup(guint32 value)
{
return (const gchar *)g_hash_table_lookup(enterprises_hashtable, GUINT_TO_POINTER(value));
}
const gchar *
enterprises_lookup(guint32 value, const char *unknown_str)
{
const gchar *s;
s = try_enterprises_lookup(value);
if (s != NULL)
return s;
if (unknown_str != NULL)
return unknown_str;
return "<Unknown>";
}
void
enterprises_base_custom(char *buf, guint32 value)
{
const gchar *s;
if ((s = try_enterprises_lookup(value)) == NULL)
s = ITEM_LABEL_UNKNOWN_STR;
g_snprintf(buf, ITEM_LABEL_LENGTH, "%s (%u)", s, value);
}
static void
enterprises_cleanup(void)
{
g_assert(enterprises_hashtable);
g_hash_table_destroy(enterprises_hashtable);
enterprises_hashtable = NULL;
g_assert(g_enterprises_path);
g_free(g_enterprises_path);
g_enterprises_path = NULL;
g_free(g_penterprises_path);
g_penterprises_path = NULL;
g_free(g_pservices_path);
g_pservices_path = NULL;
}
/* Fill in an IP4 structure with info from subnets file or just with the
* string form of the address.
*/
static void
fill_dummy_ip4(const guint addr, hashipv4_t* volatile tp)
{
subnet_entry_t subnet_entry;
/* Overwrite if we get async DNS reply */
/* Do we have a subnet for this address? */
subnet_entry = subnet_lookup(addr);
if (0 != subnet_entry.mask) {
/* Print name, then '.' then IP address after subnet mask */
guint32 host_addr;
gchar buffer[WS_INET_ADDRSTRLEN];
gchar* paddr;
gsize i;
host_addr = addr & (~subnet_entry.mask);