aboutsummaryrefslogtreecommitdiffstats
path: root/epan/conversation_table.c
blob: 3f2f5eddd4b9bc9c77cfb46d1100650aaf73cece (plain)
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
/* conversations_table.c
 * conversations_table   2003 Ronnie Sahlberg
 * Helper routines common to all endpoint conversations tap.
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <string.h>

#include "packet_info.h"
#include "proto.h"
#include "conversation_table.h"
#include "addr_resolv.h"
#include "emem.h"

#include "stat_cmd_args.h"

GList *cmd_string_list_ = NULL;

struct register_ct {
    gboolean hide_ports;       /* hide TCP / UDP port columns */
    int proto_id;              /* protocol id (0-indexed) */
    tap_packet_cb conv_func;   /* function to be called for new incoming packets for conversation*/
    tap_packet_cb host_func;   /* function to be called for new incoming packets for hostlist */
    host_tap_prefix prefix_func;  /* function to provide prefix if different than default (host) */
    conv_gui_init_cb conv_gui_init; /* GUI specific function to initialize conversation */
    host_gui_init_cb host_gui_init; /* GUI specific function to initialize hostlist */
};

gboolean get_conversation_hide_ports(register_ct_t* ct)
{
    return ct->hide_ports;
}

int get_conversation_proto_id(register_ct_t* ct)
{
    if (!ct) {
        return -1;
    }
    return ct->proto_id;
}

tap_packet_cb get_conversation_packet_func(register_ct_t* ct)
{
    return ct->conv_func;
}

tap_packet_cb get_hostlist_packet_func(register_ct_t* ct)
{
    return ct->host_func;
}

host_tap_prefix get_hostlist_prefix_func(register_ct_t* ct)
{
    return ct->prefix_func;
}


static GSList *registered_ct_tables = NULL;

void
dissector_conversation_init(const char *opt_arg, void* userdata)
{
    register_ct_t *table = (register_ct_t*)userdata;
    GString *cmd_str = g_string_new("conv,");
    const char *filter=NULL;

    g_string_append(cmd_str, proto_get_protocol_filter_name(table->proto_id));
    if(!strncmp(opt_arg, cmd_str->str, cmd_str->len)){
        filter = opt_arg + cmd_str->len;
    } else {
        filter = NULL;
    }
    g_string_free(cmd_str, TRUE);

    if (table->conv_gui_init)
        table->conv_gui_init(table, filter);
}

void
dissector_hostlist_init(const char *opt_arg, void* userdata)
{
    register_ct_t *table = (register_ct_t*)userdata;
    GString *cmd_str = g_string_new("");
    const char *filter=NULL;

    g_string_printf(cmd_str, "%s,%s,", (table->prefix_func != NULL) ? table->prefix_func() : "host", proto_get_protocol_filter_name(table->proto_id));
    if(!strncmp(opt_arg, cmd_str->str, cmd_str->len)){
        filter=opt_arg+cmd_str->len;
    } else {
        filter=NULL;
    }

    g_string_free(cmd_str, TRUE);

    if (table->host_gui_init)
        table->host_gui_init(table, filter);
}
/** get conversation from protocol ID
 *
 * @param proto_id protocol ID
 * @return tap function handler of conversation
 */
register_ct_t* get_conversation_by_proto_id(int proto_id)
{
    GSList *ct;
    register_ct_t *table;

    for(ct = registered_ct_tables; ct != NULL; ct = g_slist_next(ct)){
        table = (register_ct_t*)ct->data;
        if ((table) && (table->proto_id == proto_id))
            return table;
    }

    return NULL;
}

static gint
insert_sorted_by_table_name(gconstpointer aparam, gconstpointer bparam)
{
    const register_ct_t *a = (register_ct_t *)aparam;
    const register_ct_t *b = (register_ct_t *)bparam;

    return g_ascii_strcasecmp(proto_get_protocol_short_name(find_protocol_by_id(a->proto_id)), proto_get_protocol_short_name(find_protocol_by_id(b->proto_id)));
}

void
register_conversation_table(const int proto_id, gboolean hide_ports, tap_packet_cb conv_packet_func, tap_packet_cb hostlist_func, host_tap_prefix prefix_func)
{
    register_ct_t *table;
    GString *conv_cmd_str = g_string_new("conv,");
    GString *host_cmd_str = g_string_new("");
    stat_tap_ui ui_info;

    table = g_new(register_ct_t,1);

    table->hide_ports    = hide_ports;
    table->proto_id      = proto_id;
    table->conv_func     = conv_packet_func;
    table->host_func     = hostlist_func;
    table->conv_gui_init = NULL;
    table->host_gui_init = NULL;
    table->prefix_func   = prefix_func;

    registered_ct_tables = g_slist_insert_sorted(registered_ct_tables, table, insert_sorted_by_table_name);

    g_string_append(conv_cmd_str, proto_get_protocol_filter_name(table->proto_id));
    cmd_string_list_ = g_list_append(cmd_string_list_, conv_cmd_str->str);
    ui_info.group = REGISTER_STAT_GROUP_CONVERSATION_LIST;
    ui_info.title = NULL;	/* construct this from the protocol info? */
    ui_info.cli_string = conv_cmd_str->str;
    ui_info.tap_init_cb = dissector_conversation_init;
    ui_info.index = -1;
    ui_info.nparams = 0;
    ui_info.params = NULL;
    register_stat_tap_ui(&ui_info, table);
    g_string_free(conv_cmd_str, FALSE);

    g_string_printf(host_cmd_str, "%s,%s", (get_hostlist_prefix_func(table) != NULL) ? get_hostlist_prefix_func(table)() : "host",
                    proto_get_protocol_filter_name(table->proto_id));
    ui_info.group = REGISTER_STAT_GROUP_ENDPOINT_LIST;
    ui_info.title = NULL;	/* construct this from the protocol info? */
    ui_info.cli_string = host_cmd_str->str;
    ui_info.tap_init_cb = dissector_hostlist_init;
    ui_info.index = -1;
    ui_info.nparams = 0;
    ui_info.params = NULL;
    register_stat_tap_ui(&ui_info, table);
    g_string_free(host_cmd_str, FALSE);
}

/* Set GUI fields for register_ct list */
static void
set_conv_gui_data(gpointer data, gpointer user_data)
{
    register_ct_t *table = (register_ct_t*)data;
    table->conv_gui_init = (conv_gui_init_cb)user_data;
}

void conversation_table_set_gui_info(conv_gui_init_cb init_cb)
{
    g_slist_foreach(registered_ct_tables, set_conv_gui_data, init_cb);
}

static void
set_host_gui_data(gpointer data, gpointer user_data)
{
    register_ct_t *table = (register_ct_t*)data;
    table->host_gui_init = (host_gui_init_cb)user_data;
}

void hostlist_table_set_gui_info(host_gui_init_cb init_cb)
{
    g_slist_foreach(registered_ct_tables, set_host_gui_data, init_cb);
}

void conversation_table_iterate_tables(GFunc func, gpointer user_data)
{
    g_slist_foreach(registered_ct_tables, func, user_data);
}

guint conversation_table_get_num(void)
{
    return g_slist_length(registered_ct_tables);
}


register_ct_t *get_conversation_table_by_num(guint table_num)
{
    return (register_ct_t *) g_slist_nth_data(registered_ct_tables, table_num);
}

/** Compute the hash value for two given address/port pairs.
 * (Parameter type is gconstpointer for GHashTable compatibility.)
 *
 * @param v Conversation Key. MUST point to a conv_key_t struct.
 * @return Computed key hash.
 */
static guint
conversation_hash(gconstpointer v)
{
    const conv_key_t *key = (const conv_key_t *)v;
    guint hash_val;

    hash_val = 0;
    ADD_ADDRESS_TO_HASH(hash_val, &key->addr1);
    hash_val += key->port1;
    ADD_ADDRESS_TO_HASH(hash_val, &key->addr2);
    hash_val += key->port2;
    hash_val ^= key->conv_id;

    return hash_val;
}

/** Compare two conversation keys for an exact match.
 * (Parameter types are gconstpointer for GHashTable compatibility.)
 *
 * @param key1 First conversation. MUST point to a conv_key_t struct.
 * @param key2 Second conversation. MUST point to a conv_key_t struct.
 * @return TRUE if conversations are equal, FALSE otherwise.
 */
static gboolean
conversation_equal(gconstpointer key1, gconstpointer key2)
{
    const conv_key_t *ck1 = (const conv_key_t *)key1;
    const conv_key_t *ck2 = (const conv_key_t *)key2;

    if (ck1->conv_id == ck2->conv_id)
    {
        if (ck1->port1 == ck2->port1 &&
            ck1->port2 == ck2->port2 &&
            ADDRESSES_EQUAL(&ck1->addr1, &ck2->addr1) &&
            ADDRESSES_EQUAL(&ck1->addr2, &ck2->addr2)) {
            return TRUE;
        }

        if (ck1->port2 == ck2->port1 &&
            ck1->port1 == ck2->port2 &&
            ADDRESSES_EQUAL(&ck1->addr2, &ck2->addr1) &&
            ADDRESSES_EQUAL(&ck1->addr1, &ck2->addr2)) {
            return TRUE;
        }
    }

    /*
     * The addresses, ports, or conversation IDs don't match.
     */
    return FALSE;
}

void
reset_conversation_table_data(conv_hash_t *ch)
{
    if (!ch) {
        return;
    }

    if (ch->conv_array != NULL) {
        guint i;
        for(i = 0; i < ch->conv_array->len; i++){
            conv_item_t *conv = &g_array_index(ch->conv_array, conv_item_t, i);
            g_free((gpointer)conv->src_address.data);
            g_free((gpointer)conv->dst_address.data);
        }

        g_array_free(ch->conv_array, TRUE);
    }

    if (ch->hashtable != NULL) {
        g_hash_table_destroy(ch->hashtable);
    }

    ch->conv_array=NULL;
    ch->hashtable=NULL;
}

void reset_hostlist_table_data(conv_hash_t *ch)
{
    if (!ch) {
        return;
    }

    if (ch->conv_array != NULL) {
        guint i;
        for(i = 0; i < ch->conv_array->len; i++){
            hostlist_talker_t *host = &g_array_index(ch->conv_array, hostlist_talker_t, i);
            g_free((gpointer)host->myaddress.data);
        }

        g_array_free(ch->conv_array, TRUE);
    }

    if (ch->hashtable != NULL) {
        g_hash_table_destroy(ch->hashtable);
    }

    ch->conv_array=NULL;
    ch->hashtable=NULL;
}

const char *get_conversation_address(address *addr, gboolean resolve_names)
{
    if (resolve_names) {
        return ep_address_to_display(addr);
    } else {
        return ep_address_to_str(addr);
    }
}

const char *get_conversation_port(guint32 port, port_type ptype, gboolean resolve_names)
{

    if(!resolve_names) ptype = PT_NONE;

    switch(ptype) {
    case(PT_TCP):
        return ep_tcp_port_to_display(port);
    case(PT_UDP):
        return ep_udp_port_to_display(port);
    case(PT_SCTP):
        return ep_sctp_port_to_display(port);
    default:
        return ep_strdup_printf("%d", port);
    }
}

/* given an address (to distinguish between ipv4 and ipv6 for tcp/udp),
   a port_type and a name_type (FN_...)
   return a string for the filter name.

   Some addresses, like AT_ETHER may actually be any of multiple types
   of protocols,   either ethernet, tokenring, fddi, wlan etc so we must be
   more specific there;  that's why we need specific_addr_type.
*/
static const char *
conversation_get_filter_name(conv_item_t *conv_item, conv_filter_type_e filter_type)
{

    if ((conv_item == NULL) || (conv_item->dissector_info == NULL) || (conv_item->dissector_info->get_filter_type == NULL)) {
        return CONV_FILTER_INVALID;
    }

    return conv_item->dissector_info->get_filter_type(conv_item, filter_type);
}

static const char *
hostlist_get_filter_name(hostlist_talker_t *host, conv_filter_type_e filter_type)
{

    if ((host == NULL) || (host->dissector_info == NULL) || (host->dissector_info->get_filter_type == NULL)) {
        return CONV_FILTER_INVALID;
    }

    return host->dissector_info->get_filter_type(host, filter_type);
}

/* Convert a port number into a string or NULL */
static char *
ct_port_to_str(port_type ptype, guint32 port)
{
    switch(ptype){
    case PT_TCP:
    case PT_UDP:
    case PT_SCTP:
    case PT_NCP:
        return g_strdup_printf("%d", port);
    default:
        break;
    }
    return NULL;
}

const char *get_conversation_filter(conv_item_t *conv_item, conv_direction_e direction)
{
    char *sport, *dport;
    const char *str = "INVALID";

    sport = ct_port_to_str(conv_item->ptype, conv_item->src_port);
    dport = ct_port_to_str(conv_item->ptype, conv_item->dst_port);

    switch(direction){
    case CONV_DIR_A_TO_FROM_B:
        /* A <-> B */
        str = ep_strdup_printf("%s==%s%s%s%s%s && %s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_ANY_ADDRESS),
                              ep_address_to_str(&conv_item->src_address),
                              sport?" && ":"",
                              sport?conversation_get_filter_name(conv_item,  CONV_FT_ANY_PORT):"",
                              sport?"==":"",
                              sport?sport:"",
                              conversation_get_filter_name(conv_item,  CONV_FT_ANY_ADDRESS),
                              ep_address_to_str(&conv_item->dst_address),
                              dport?" && ":"",
                              dport?conversation_get_filter_name(conv_item,  CONV_FT_ANY_PORT):"",
                              dport?"==":"",
                              dport?dport:""
            );
        break;
    case CONV_DIR_A_TO_B:
        /* A --> B */
        str = ep_strdup_printf("%s==%s%s%s%s%s && %s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_SRC_ADDRESS),
                              ep_address_to_str(&conv_item->src_address),
                              sport?" && ":"",
                              sport?conversation_get_filter_name(conv_item,  CONV_FT_SRC_PORT):"",
                              sport?"==":"",
                              sport?sport:"",
                              conversation_get_filter_name(conv_item,  CONV_FT_DST_ADDRESS),
                              ep_address_to_str(&conv_item->dst_address),
                              dport?" && ":"",
                              dport?conversation_get_filter_name(conv_item,  CONV_FT_DST_PORT):"",
                              dport?"==":"",
                              dport?dport:""
            );
        break;
    case CONV_DIR_A_FROM_B:
        /* A <-- B */
        str = ep_strdup_printf("%s==%s%s%s%s%s && %s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_DST_ADDRESS),
                              ep_address_to_str(&conv_item->src_address),
                              sport?" && ":"",
                              sport?conversation_get_filter_name(conv_item,  CONV_FT_DST_PORT):"",
                              sport?"==":"",
                              sport?sport:"",
                              conversation_get_filter_name(conv_item,  CONV_FT_SRC_ADDRESS),
                              ep_address_to_str(&conv_item->dst_address),
                              dport?" && ":"",
                              dport?conversation_get_filter_name(conv_item,  CONV_FT_SRC_PORT):"",
                              dport?"==":"",
                              dport?dport:""
            );
        break;
    case CONV_DIR_A_TO_FROM_ANY:
        /* A <-> ANY */
        str = ep_strdup_printf("%s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_ANY_ADDRESS),
                              ep_address_to_str(&conv_item->src_address),
                              sport?" && ":"",
                              sport?conversation_get_filter_name(conv_item,  CONV_FT_ANY_PORT):"",
                              sport?"==":"",
                              sport?sport:""
            );
        break;
    case CONV_DIR_A_TO_ANY:
        /* A --> ANY */
        str = ep_strdup_printf("%s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_SRC_ADDRESS),
                              ep_address_to_str(&conv_item->src_address),
                              sport?" && ":"",
                              sport?conversation_get_filter_name(conv_item,  CONV_FT_SRC_PORT):"",
                              sport?"==":"",
                              sport?sport:""
            );
        break;
    case CONV_DIR_A_FROM_ANY:
        /* A <-- ANY */
        str = ep_strdup_printf("%s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_DST_ADDRESS),
                              ep_address_to_str(&conv_item->src_address),
                              sport?" && ":"",
                              sport?conversation_get_filter_name(conv_item,  CONV_FT_DST_PORT):"",
                              sport?"==":"",
                              sport?sport:""
            );
        break;
    case CONV_DIR_ANY_TO_FROM_B:
        /* ANY <-> B */
        str = ep_strdup_printf("%s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_ANY_ADDRESS),
                              ep_address_to_str(&conv_item->dst_address),
                              dport?" && ":"",
                              dport?conversation_get_filter_name(conv_item,  CONV_FT_ANY_PORT):"",
                              dport?"==":"",
                              dport?dport:""
            );
        break;
    case CONV_DIR_ANY_FROM_B:
        /* ANY <-- B */
        str = ep_strdup_printf("%s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_SRC_ADDRESS),
                              ep_address_to_str(&conv_item->dst_address),
                              dport?" && ":"",
                              dport?conversation_get_filter_name(conv_item,  CONV_FT_SRC_PORT):"",
                              dport?"==":"",
                              dport?dport:""
            );
        break;
    case CONV_DIR_ANY_TO_B:
        /* ANY --> B */
        str = ep_strdup_printf("%s==%s%s%s%s%s",
                              conversation_get_filter_name(conv_item,  CONV_FT_DST_ADDRESS),
                              ep_address_to_str(&conv_item->dst_address),
                              dport?" && ":"",
                              dport?conversation_get_filter_name(conv_item,  CONV_FT_DST_PORT):"",
                              dport?"==":"",
                              dport?dport:""
            );
        break;
    default:
        break;
    }
    g_free(sport);
    g_free(dport);
    return str;
}

const char *get_hostlist_filter(hostlist_talker_t *host)
{
    char *sport;
    const char *str;

    sport=ct_port_to_str(host->ptype, host->port);

    str = g_strdup_printf("%s==%s%s%s%s%s",
                          hostlist_get_filter_name(host, CONV_FT_ANY_ADDRESS),
                          ep_address_to_str(&host->myaddress),
                          sport?" && ":"",
                          sport?hostlist_get_filter_name(host, CONV_FT_ANY_PORT):"",
                          sport?"==":"",
                          sport?sport:"");

    return str;
}

void
add_conversation_table_data(conv_hash_t *ch, const address *src, const address *dst, guint32 src_port, guint32 dst_port, int num_frames, int num_bytes,
        nstime_t *ts, nstime_t *abs_ts, ct_dissector_info_t *ct_info, port_type ptype)
{
    add_conversation_table_data_with_conv_id(ch, src, dst, src_port, dst_port, CONV_ID_UNSET, num_frames, num_bytes, ts, abs_ts, ct_info, ptype);
}

void
add_conversation_table_data_with_conv_id(
    conv_hash_t *ch,
    const address *src,
    const address *dst,
    guint32 src_port,
    guint32 dst_port,
    conv_id_t conv_id,
    int num_frames,
    int num_bytes,
    nstime_t *ts,
    nstime_t *abs_ts,
    ct_dissector_info_t *ct_info,
    port_type ptype)
{
    const address *addr1, *addr2;
    guint32 port1, port2;
    conv_item_t *conv_item = NULL;
    unsigned int conversation_idx = 0;

    if (src_port > dst_port) {
        addr1 = src;
        addr2 = dst;
        port1 = src_port;
        port2 = dst_port;
    } else if (src_port < dst_port) {
        addr2 = src;
        addr1 = dst;
        port2 = src_port;
        port1 = dst_port;
    } else if (CMP_ADDRESS(src, dst) < 0) {
        addr1 = src;
        addr2 = dst;
        port1 = src_port;
        port2 = dst_port;
    } else {
        addr2 = src;
        addr1 = dst;
        port2 = src_port;
        port1 = dst_port;
    }

    /* if we don't have any entries at all yet */
    if (ch->conv_array == NULL) {
        ch->conv_array = g_array_sized_new(FALSE, FALSE, sizeof(conv_item_t), 10000);

        ch->hashtable = g_hash_table_new_full(conversation_hash,
                                              conversation_equal, /* key_equal_func */
                                              g_free,             /* key_destroy_func */
                                              NULL);              /* value_destroy_func */

    } else {
        /* try to find it among the existing known conversations */
        conv_key_t existing_key;

        existing_key.addr1 = *addr1;
        existing_key.addr2 = *addr2;
        existing_key.port1 = port1;
        existing_key.port2 = port2;
        existing_key.conv_id = conv_id;
        if (g_hash_table_lookup_extended(ch->hashtable, &existing_key, NULL, (gpointer *) &conversation_idx)) {
            conv_item = &g_array_index(ch->conv_array, conv_item_t, conversation_idx);
        }
    }

    /* if we still don't know what conversation this is it has to be a new one
       and we have to allocate it and append it to the end of the list */
    if (conv_item == NULL) {
        conv_key_t *new_key;
        conv_item_t new_conv_item;

        COPY_ADDRESS(&new_conv_item.src_address, addr1);
        COPY_ADDRESS(&new_conv_item.dst_address, addr2);
        new_conv_item.dissector_info = ct_info;
        new_conv_item.ptype = ptype;
        new_conv_item.src_port = port1;
        new_conv_item.dst_port = port2;
        new_conv_item.conv_id = conv_id;
        new_conv_item.rx_frames = 0;
        new_conv_item.tx_frames = 0;
        new_conv_item.rx_bytes = 0;
        new_conv_item.tx_bytes = 0;
        new_conv_item.modified = TRUE;

        if (ts) {
            memcpy(&new_conv_item.start_time, ts, sizeof(new_conv_item.start_time));
            memcpy(&new_conv_item.stop_time, ts, sizeof(new_conv_item.stop_time));
            memcpy(&new_conv_item.start_abs_time, abs_ts, sizeof(new_conv_item.start_abs_time));
        } else {
            nstime_set_unset(&new_conv_item.start_abs_time);
            nstime_set_unset(&new_conv_item.start_time);
            nstime_set_unset(&new_conv_item.stop_time);
        }
        g_array_append_val(ch->conv_array, new_conv_item);
        conversation_idx = ch->conv_array->len - 1;
        conv_item = &g_array_index(ch->conv_array, conv_item_t, conversation_idx);

        /* ct->conversations address is not a constant but src/dst_address.data are */
        new_key = g_new(conv_key_t, 1);
        SET_ADDRESS(&new_key->addr1, conv_item->src_address.type, conv_item->src_address.len, conv_item->src_address.data);
        SET_ADDRESS(&new_key->addr2, conv_item->dst_address.type, conv_item->dst_address.len, conv_item->dst_address.data);
        new_key->port1 = port1;
        new_key->port2 = port2;
        new_key->conv_id = conv_id;
        g_hash_table_insert(ch->hashtable, new_key, GUINT_TO_POINTER(conversation_idx));
    }

    /* update the conversation struct */
    conv_item->modified = TRUE;
    if ( (!CMP_ADDRESS(src, addr1)) && (!CMP_ADDRESS(dst, addr2)) && (src_port==port1) && (dst_port==port2) ) {
        conv_item->tx_frames += num_frames;
        conv_item->tx_bytes += num_bytes;
    } else {
        conv_item->rx_frames += num_frames;
        conv_item->rx_bytes += num_bytes;
    }

    if (ts) {
        if (nstime_cmp(ts, &conv_item->stop_time) > 0) {
            memcpy(&conv_item->stop_time, ts, sizeof(conv_item->stop_time));
        } else if (nstime_cmp(ts, &conv_item->start_time) < 0) {
            memcpy(&conv_item->start_time, ts, sizeof(conv_item->start_time));
            memcpy(&conv_item->start_abs_time, abs_ts, sizeof(conv_item->start_abs_time));
        }
    }
}

/*
 * Compute the hash value for a given address/port pairs if the match
 * is to be exact.
 */
static guint
host_hash(gconstpointer v)
{
    const host_key_t *key = (const host_key_t *)v;
    guint hash_val;

    hash_val = 0;
    ADD_ADDRESS_TO_HASH(hash_val, &key->myaddress);
    hash_val += key->port;
    return hash_val;
}

/*
 * Compare two host keys for an exact match.
 */
static gint
host_match(gconstpointer v, gconstpointer w)
{
    const host_key_t *v1 = (const host_key_t *)v;
    const host_key_t *v2 = (const host_key_t *)w;

    if (v1->port == v2->port &&
        ADDRESSES_EQUAL(&v1->myaddress, &v2->myaddress)) {
        return 1;
    }
    /*
     * The addresses or the ports don't match.
     */
    return 0;
}

void
add_hostlist_table_data(conv_hash_t *ch, const address *addr, guint32 port, gboolean sender, int num_frames, int num_bytes, hostlist_dissector_info_t *host_info, port_type port_type_val)
{
    hostlist_talker_t *talker=NULL;
    int talker_idx=0;

    /* XXX should be optimized to allocate n extra entries at a time
       instead of just one */
    /* if we don't have any entries at all yet */
    if(ch->conv_array==NULL){
        ch->conv_array=g_array_sized_new(FALSE, FALSE, sizeof(hostlist_talker_t), 10000);
        ch->hashtable = g_hash_table_new_full(host_hash,
                                              host_match, /* key_equal_func */
                                              g_free,     /* key_destroy_func */
                                              NULL);      /* value_destroy_func */
    }
    else {
        /* try to find it among the existing known conversations */
        host_key_t existing_key;

        existing_key.myaddress = *addr;
        existing_key.port = port;

        if (g_hash_table_lookup_extended(ch->hashtable, &existing_key, NULL, (gpointer *) &talker_idx)) {
            talker = &g_array_index(ch->conv_array, hostlist_talker_t, talker_idx);
        }
    }

    /* if we still don't know what talker this is it has to be a new one
       and we have to allocate it and append it to the end of the list */
    if(talker==NULL){
        host_key_t *new_key;
        hostlist_talker_t host;

        COPY_ADDRESS(&host.myaddress, addr);
        host.dissector_info = host_info;
        host.ptype=port_type_val;
        host.port=port;
        host.rx_frames=0;
        host.tx_frames=0;
        host.rx_bytes=0;
        host.tx_bytes=0;
        host.modified = TRUE;

        g_array_append_val(ch->conv_array, host);
        talker_idx= ch->conv_array->len - 1;
        talker=&g_array_index(ch->conv_array, hostlist_talker_t, talker_idx);

        /* hl->hosts address is not a constant but address.data is */
        new_key = g_new(host_key_t,1);
        SET_ADDRESS(&new_key->myaddress, talker->myaddress.type, talker->myaddress.len, talker->myaddress.data);
        new_key->port = port;
        g_hash_table_insert(ch->hashtable, new_key, GUINT_TO_POINTER(talker_idx));
    }

    /* if this is a new talker we need to initialize the struct */
    talker->modified = TRUE;

    /* update the talker struct */
    if( sender ){
        talker->tx_frames+=num_frames;
        talker->tx_bytes+=num_bytes;
    } else {
        talker->rx_frames+=num_frames;
        talker->rx_bytes+=num_bytes;
    }
}

/*
 * Editor modelines
 *
 * Local Variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */