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tap-sctp-analysis.c
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/*
* Copyright 2004-2013, Irene Ruengeler <i.ruengeler [AT] fh-muenster.de>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <[email protected]>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <string.h>
#include <math.h>
#include <glib.h>
#include "epan/packet_info.h"
#include "epan/tap.h"
#include "epan/value_string.h"
#include "ui/tap-sctp-analysis.h"
#include "ui/simple_dialog.h"
#define FORWARD_STREAM 0
#define BACKWARD_STREAM 1
#define FORWARD_ADD_FORWARD_VTAG 2
#define BACKWARD_ADD_FORWARD_VTAG 3
#define BACKWARD_ADD_BACKWARD_VTAG 4
#define ADDRESS_FORWARD_STREAM 5
#define ADDRESS_BACKWARD_STREAM 6
#define ADDRESS_FORWARD_ADD_FORWARD_VTAG 7
#define ADDRESS_BACKWARD_ADD_FORWARD_VTAG 8
#define ADDRESS_BACKWARD_ADD_BACKWARD_VTAG 9
#define ASSOC_NOT_FOUND 10
static sctp_allassocs_info_t sctp_tapinfo_struct = {0, NULL, FALSE, NULL};
static void
free_first(gpointer data, gpointer user_data _U_)
{
g_free(data);
}
static void
tsn_free(gpointer data)
{
tsn_t *tsn;
tsn = (tsn_t *) data;
if (tsn->tsns != NULL)
{
g_list_free_full(tsn->tsns, g_free);
}
free_address(&tsn->src);
free_address(&tsn->dst);
g_free(tsn);
}
static void
chunk_free(gpointer data)
{
sctp_addr_chunk *chunk = (sctp_addr_chunk *) data;
free_address(&chunk->addr);
g_free(chunk);
}
static void
store_free(gpointer data)
{
address *addr = (address *) data;
free_address(addr);
g_free(addr);
}
static void
reset(void *arg)
{
sctp_allassocs_info_t *tapdata = (sctp_allassocs_info_t *)arg;
GList* list;
sctp_assoc_info_t * info;
list = g_list_first(tapdata->assoc_info_list);
while (list)
{
info = (sctp_assoc_info_t *) (list->data);
if (info->addr1 != NULL)
{
g_list_free_full(info->addr1, store_free);
info->addr1 = NULL;
}
if (info->addr2 != NULL)
{
g_list_free_full(info->addr2, store_free);
info->addr2 = NULL;
}
if (info->error_info_list != NULL)
{
g_list_free_full(info->error_info_list, g_free);
info->error_info_list = NULL;
}
if (info->frame_numbers != NULL)
{
g_list_free(info->frame_numbers);
info->frame_numbers = NULL;
}
if (info->tsn1 != NULL)
{
g_list_free_full(info->tsn1, tsn_free);
info->tsn1 = NULL;
}
if (info->tsn2 != NULL)
{
g_list_free_full(info->tsn2, tsn_free);
info->tsn2 = NULL;
}
if (info->sack1 != NULL)
{
g_list_free_full(info->sack1, tsn_free);
info->sack1 = NULL;
}
if (info->sack2 != NULL)
{
g_list_free_full(info->sack2, tsn_free);
info->sack2 = NULL;
}
if (info->sort_tsn1 != NULL)
g_ptr_array_free(info->sort_tsn1, TRUE);
if (info->sort_tsn2 != NULL)
g_ptr_array_free(info->sort_tsn2, TRUE);
if (info->sort_sack1 != NULL)
g_ptr_array_free(info->sort_sack1, TRUE);
if (info->sort_sack2 != NULL)
g_ptr_array_free(info->sort_sack2, TRUE);
if (info->min_max != NULL)
{
g_slist_foreach(info->min_max, free_first, NULL);
info->min_max = NULL;
}
if (info->addr_chunk_count) {
g_list_free_full(info->addr_chunk_count, chunk_free);
}
g_free(info->dir1);
g_free(info->dir2);
free_address(&info->src);
free_address(&info->dst);
g_free(list->data);
list = g_list_next(list);
}
g_list_free(tapdata->assoc_info_list);
tapdata->sum_tvbs = 0;
tapdata->assoc_info_list = NULL;
}
static sctp_assoc_info_t *
calc_checksum(const struct _sctp_info *check_data, sctp_assoc_info_t *data)
{
gboolean ok = FALSE;
if (check_data->adler32_calculated)
{
data->n_adler32_calculated++;
if (check_data->adler32_correct)
data->n_adler32_correct++;
}
if (check_data->crc32c_calculated)
{
data->n_crc32c_calculated++;
if (check_data->crc32c_correct)
data->n_crc32c_correct++;
}
if (data->n_adler32_calculated > 0)
{
if ((float)(data->n_adler32_correct*1.0/data->n_adler32_calculated) > 0.5)
{
char str[] = "ADLER32";
g_strlcpy(data->checksum_type, str, strlen(str));
data->n_checksum_errors=(data->n_adler32_calculated-data->n_adler32_correct);
ok = TRUE;
}
}
if (data->n_crc32c_calculated>0)
{
if ((float)(data->n_crc32c_correct*1.0/data->n_crc32c_calculated) > 0.5)
{
char str[] = "CRC32C";
g_strlcpy(data->checksum_type, str, strlen(str));
data->n_checksum_errors=data->n_crc32c_calculated-data->n_crc32c_correct;
ok = TRUE;
}
}
if (!ok)
{
char str[] = "UNKNOWN";
g_strlcpy(data->checksum_type, str, strlen(str));
data->n_checksum_errors=0;
}
return(data);
}
static sctp_assoc_info_t *
find_assoc(sctp_tmp_info_t *needle)
{
sctp_allassocs_info_t *assoc_info;
sctp_assoc_info_t *info = NULL;
GList* list;
assoc_info = &sctp_tapinfo_struct;
if ((list = g_list_last(assoc_info->assoc_info_list))!=NULL)
{
while (list)
{
info = (sctp_assoc_info_t*)(list->data);
if (needle->assoc_id == info->assoc_id)
return info;
list = g_list_previous(list);
}
}
return NULL;
}
static sctp_assoc_info_t *
add_chunk_count(address *vadd, sctp_assoc_info_t *info, guint32 direction, guint32 type)
{
GList *list;
sctp_addr_chunk *ch=NULL;
int i;
list = g_list_first(info->addr_chunk_count);
while (list)
{
ch = (sctp_addr_chunk *)(list->data);
if (ch->direction == direction)
{
if (addresses_equal(vadd, &ch->addr))
{
if (IS_SCTP_CHUNK_TYPE(type))
ch->addr_count[type]++;
else
ch->addr_count[OTHER_CHUNKS_INDEX]++;
return info;
}
else
{
list = g_list_next(list);
}
}
else
list = g_list_next(list);
}
ch = g_new(sctp_addr_chunk, 1);
ch->direction = direction;
copy_address(&ch->addr, vadd);
for (i=0; i < NUM_CHUNKS; i++)
ch->addr_count[i] = 0;
if (IS_SCTP_CHUNK_TYPE(type))
ch->addr_count[type]++;
else
ch->addr_count[OTHER_CHUNKS_INDEX]++;
info->addr_chunk_count = g_list_append(info->addr_chunk_count, ch);
return info;
}
static sctp_assoc_info_t *
add_address(address *vadd, sctp_assoc_info_t *info, guint16 direction)
{
GList *list;
address *v=NULL;
if (direction == 1)
list = g_list_first(info->addr1);
else
list = g_list_first(info->addr2);
while (list)
{
v = (address *) (list->data);
if (addresses_equal(vadd, v)) {
free_address(vadd);
g_free(vadd);
return info;
}
list = g_list_next(list);
}
if (direction == 1)
info->addr1 = g_list_append(info->addr1, vadd);
else if (direction==2)
info->addr2 = g_list_append(info->addr2, vadd);
return info;
}
static tap_packet_status
packet(void *tapdata _U_, packet_info *pinfo, epan_dissect_t *edt _U_, const void *data)
{
const struct _sctp_info *sctp_info = (const struct _sctp_info *)data;
guint32 chunk_number = 0, tsnumber, framenumber;
sctp_tmp_info_t tmp_info;
sctp_assoc_info_t *info = NULL;
sctp_error_info_t *error = NULL;
guint16 type, length = 0;
address *store = NULL;
tsn_t *tsn = NULL;
tsn_t *sack = NULL;
guint8 *t_s_n = NULL;
gboolean sackchunk = FALSE;
gboolean datachunk = FALSE;
gboolean forwardchunk = FALSE;
struct tsn_sort *tsn_s;
int i;
guint8 idx = 0;
gboolean tsn_used = FALSE;
gboolean sack_used = FALSE;
framenumber = pinfo->num;
type = sctp_info->ip_src.type;
if (type == AT_IPv4 || type == AT_IPv6)
copy_address(&tmp_info.src, &sctp_info->ip_src);
else
set_address(&tmp_info.src, AT_NONE, 0, NULL);
type = sctp_info->ip_dst.type;
if (type == AT_IPv4 || type == AT_IPv6)
copy_address(&tmp_info.dst, &sctp_info->ip_dst);
else
set_address(&tmp_info.dst, AT_NONE, 0, NULL);
tmp_info.port1 = sctp_info->sport;
tmp_info.port2 = sctp_info->dport;
if (sctp_info->vtag_reflected)
{
tmp_info.verification_tag2 = sctp_info->verification_tag;
tmp_info.verification_tag1 = 0;
}
else
{
tmp_info.verification_tag1 = sctp_info->verification_tag;
tmp_info.verification_tag2 = 0;
}
tmp_info.n_tvbs = 0;
if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_CHUNK_ID)
{
tmp_info.initiate_tag = tvb_get_ntohl(sctp_info->tvb[0], 4);
}
else
{
tmp_info.initiate_tag = 0;
}
tmp_info.direction = sctp_info->direction;
tmp_info.assoc_id = sctp_info->assoc_index;
info = find_assoc(&tmp_info);
if (!info)
{
tmp_info.n_tvbs = sctp_info->number_of_tvbs;
sctp_tapinfo_struct.sum_tvbs+=sctp_info->number_of_tvbs;
if (sctp_info->number_of_tvbs > 0)
{
info = g_new0(sctp_assoc_info_t, 1);
info->assoc_id = sctp_info->assoc_index;
copy_address(&info->src, &tmp_info.src);
copy_address(&info->dst, &tmp_info.dst);
info->port1 = tmp_info.port1;
info->port2 = tmp_info.port2;
info->verification_tag1 = tmp_info.verification_tag1;
info->verification_tag2 = tmp_info.verification_tag2;
info->initiate_tag = tmp_info.initiate_tag;
info->n_tvbs = tmp_info.n_tvbs;
info->init = FALSE;
info->initack = FALSE;
info->check_address = FALSE;
info->firstdata = TRUE;
info->direction = sctp_info->direction;
info->instream1 = 0;
info->outstream1 = 0;
info->instream2 = 0;
info->outstream2 = 0;
info = calc_checksum(sctp_info, info);
info->n_packets = 1;
info->error_info_list = NULL;
info->min_secs = 0xffffffff;
info->min_usecs = 0xffffffff;
info->max_secs = 0;
info->max_usecs = 0;
info->min_tsn2 = 0xFFFFFFFF;
info->min_tsn1 = 0xffffffff;
info->max_tsn1 = 0;
info->max_tsn2 = 0;
info->max_bytes1 = 0;
info->max_bytes2 = 0;
info->n_data_chunks = 0;
info->n_data_bytes = 0;
info->n_data_chunks_ep1 = 0;
info->n_data_bytes_ep1 = 0;
info->n_data_chunks_ep2 = 0;
info->n_data_bytes_ep2 = 0;
info->n_sack_chunks_ep1 = 0;
info->n_sack_chunks_ep2 = 0;
info->n_array_tsn1 = 0;
info->n_array_tsn2 = 0;
info->n_forward_chunks = 0;
info->max_window1 = 0;
info->max_window2 = 0;
info->min_max = NULL;
info->sort_tsn1 = g_ptr_array_new_with_free_func(g_free);
info->sort_tsn2 = g_ptr_array_new_with_free_func(g_free);
info->sort_sack1 = g_ptr_array_new_with_free_func(g_free);
info->sort_sack2 = g_ptr_array_new_with_free_func(g_free);
info->dir1 = g_new0(sctp_init_collision_t, 1);
info->dir1->init_min_tsn = 0xffffffff;
info->dir1->initack_min_tsn = 0xffffffff;
info->dir2 = g_new0(sctp_init_collision_t, 1);
info->dir2->init_min_tsn = 0xffffffff;
info->dir2->initack_min_tsn = 0xffffffff;
for (i=0; i < NUM_CHUNKS; i++)
{
info->chunk_count[i] = 0;
info->ep1_chunk_count[i] = 0;
info->ep2_chunk_count[i] = 0;
}
info->addr_chunk_count = NULL;
if (((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_ACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_DATA_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_I_DATA_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_SACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_NR_SACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_FORWARD_TSN_CHUNK_ID))
{
tsn = g_new0(tsn_t, 1);
copy_address(&tsn->src, &tmp_info.src);
copy_address(&tsn->dst, &tmp_info.dst);
sack = g_new0(tsn_t, 1);
copy_address(&sack->src, &tmp_info.src);
copy_address(&sack->dst, &tmp_info.dst);
sack->secs=tsn->secs = (guint32)pinfo->rel_ts.secs;
sack->usecs=tsn->usecs = (guint32)pinfo->rel_ts.nsecs/1000;
if (((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_DATA_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_I_DATA_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_SACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_NR_SACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_FORWARD_TSN_CHUNK_ID))
{
if (tsn->secs < info->min_secs)
{
info->min_secs = tsn->secs;
info->min_usecs = tsn->usecs;
}
else if (tsn->secs == info->min_secs && tsn->usecs < info->min_usecs)
info->min_usecs = tsn->usecs;
if (tsn->secs > info->max_secs)
{
info->max_secs = tsn->secs;
info->max_usecs = tsn->usecs;
}
else if (tsn->secs == info->max_secs && tsn->usecs > info->max_usecs)
info->max_usecs = tsn->usecs;
}
sack->frame_number = tsn->frame_number = pinfo->num;
}
if ((tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_CHUNK_ID) || (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_ACK_CHUNK_ID))
{
info->min_tsn1 = tvb_get_ntohl(sctp_info->tvb[0],INIT_CHUNK_INITIAL_TSN_OFFSET);
info->verification_tag2 = tvb_get_ntohl(sctp_info->tvb[0], INIT_CHUNK_INITIATE_TAG_OFFSET);
info->instream1 = tvb_get_ntohs(sctp_info->tvb[0],INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET);
info->outstream1 = tvb_get_ntohs(sctp_info->tvb[0],INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET);
info->arwnd1 = tvb_get_ntohl(sctp_info->tvb[0], INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET);
for (chunk_number = 1; chunk_number < sctp_info->number_of_tvbs; chunk_number++)
{
type = tvb_get_ntohs(sctp_info->tvb[chunk_number],0);
if (type == IPV4ADDRESS_PARAMETER_ID)
{
store = g_new(address, 1);
alloc_address_tvb(NULL, store, AT_IPv4, 4, sctp_info->tvb[chunk_number], IPV4_ADDRESS_OFFSET);
info = add_address(store, info, info->direction);
}
else if (type == IPV6ADDRESS_PARAMETER_ID)
{
store = g_new(address, 1);
alloc_address_tvb(NULL, store, AT_IPv6, 16, sctp_info->tvb[chunk_number], IPV6_ADDRESS_OFFSET);
info = add_address(store, info, info->direction);
}
}
if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_CHUNK_ID)
{
info->init = TRUE;
}
else
{
info->initack_dir = 1;
info->initack = TRUE;
}
idx = tvb_get_guint8(sctp_info->tvb[0],0);
if (!IS_SCTP_CHUNK_TYPE(idx))
idx = OTHER_CHUNKS_INDEX;
info->chunk_count[idx]++;
info->ep1_chunk_count[idx]++;
info = add_chunk_count(&tmp_info.src, info, 1, idx);
if (info->direction == 1) {
if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_CHUNK_ID) {
info->dir1->init = TRUE;
info->dir1->init_min_tsn = info->min_tsn1;
info->dir1->init_vtag = info->verification_tag2;
} else if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_ACK_CHUNK_ID) {
info->dir1->initack = TRUE;
info->dir1->initack_min_tsn = info->min_tsn1;
info->dir1->initack_vtag = info->verification_tag2;
}
} else {
if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_CHUNK_ID) {
info->dir2->init = TRUE;
info->dir2->init_min_tsn = info->min_tsn1;
info->dir2->init_vtag = info->verification_tag2;
} else if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_ACK_CHUNK_ID) {
info->dir2->initack = TRUE;
info->dir2->initack_min_tsn = info->min_tsn1;
info->dir2->initack_vtag = info->verification_tag2;
}
}
}
else
{
if (((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_INIT_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_INIT_ACK_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_DATA_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_I_DATA_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_SACK_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_NR_SACK_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_FORWARD_TSN_CHUNK_ID))
{
tsn = g_new0(tsn_t, 1);
sack = g_new0(tsn_t, 1);
}
for (chunk_number = 0; chunk_number < sctp_info->number_of_tvbs; chunk_number++)
{
idx = tvb_get_guint8(sctp_info->tvb[0],0);
if (!IS_SCTP_CHUNK_TYPE(idx))
idx = OTHER_CHUNKS_INDEX;
info->chunk_count[idx]++;
info->ep1_chunk_count[idx]++;
info = add_chunk_count(&tmp_info.src, info, 1, idx);
if ((tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_DATA_CHUNK_ID) ||
(tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_I_DATA_CHUNK_ID))
{
datachunk = TRUE;
if (tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_DATA_CHUNK_ID) {
length = tvb_get_ntohs(sctp_info->tvb[chunk_number], CHUNK_LENGTH_OFFSET) - DATA_CHUNK_HEADER_LENGTH;
} else {
length = tvb_get_ntohs(sctp_info->tvb[chunk_number], CHUNK_LENGTH_OFFSET) - I_DATA_CHUNK_HEADER_LENGTH;
}
info->n_data_chunks++;
info->n_data_bytes+=length;
info->outstream1 = tvb_get_ntohs((sctp_info->tvb)[chunk_number], DATA_CHUNK_STREAM_ID_OFFSET)+1;
}
if ((tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_FORWARD_TSN_CHUNK_ID))
{
forwardchunk = TRUE;
length = tvb_get_ntohs(sctp_info->tvb[chunk_number], CHUNK_LENGTH_OFFSET);
info->n_forward_chunks++;
}
if (datachunk || forwardchunk)
{
tsnumber = tvb_get_ntohl((sctp_info->tvb)[chunk_number], DATA_CHUNK_TSN_OFFSET);
info->firstdata = FALSE;
if (tsnumber < info->min_tsn1)
info->min_tsn1 = tsnumber;
if (tsnumber > info->max_tsn1)
{
if (datachunk)
{
info->n_data_chunks_ep1++;
info->n_data_bytes_ep1+=length;
}
else
info->n_forward_chunks_ep1++;
info->max_tsn1 = tsnumber;
}
if (tsn->first_tsn == 0)
tsn->first_tsn = tsnumber;
if (datachunk)
{
t_s_n = (guint8 *)g_malloc(16);
tvb_memcpy(sctp_info->tvb[chunk_number], (guint8 *)(t_s_n),0, 16);
}
else
{
t_s_n = (guint8 *)g_malloc(length);
tvb_memcpy(sctp_info->tvb[chunk_number], (guint8 *)(t_s_n),0, length);
}
tsn->tsns = g_list_append(tsn->tsns, t_s_n);
tsn_s = g_new(struct tsn_sort, 1);
tsn_s->tsnumber = tsnumber;
tsn_s->secs = tsn->secs = (guint32)pinfo->rel_ts.secs;
tsn_s->usecs = tsn->usecs = (guint32)pinfo->rel_ts.nsecs/1000;
tsn_s->offset = 0;
tsn_s->framenumber = framenumber;
if (datachunk)
if (tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_DATA_CHUNK_ID) {
tsn_s->length = length - DATA_CHUNK_HEADER_LENGTH;
} else {
tsn_s->length = length - I_DATA_CHUNK_HEADER_LENGTH;
}
else
tsn_s->length = length;
if (tsn->secs < info->min_secs)
{
info->min_secs = tsn->secs;
info->min_usecs = tsn->usecs;
}
else if (tsn->secs == info->min_secs && tsn->usecs < info->min_usecs)
info->min_usecs = tsn->usecs;
if (tsn->secs > info->max_secs)
{
info->max_secs = tsn->secs;
info->max_usecs = tsn->usecs;
}
else if (tsn->secs == info->max_secs && tsn->usecs > info->max_usecs)
info->max_usecs = tsn->usecs;
g_ptr_array_add(info->sort_tsn1, tsn_s);
info->n_array_tsn1++;
}
if ((tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_SACK_CHUNK_ID) ||
(tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_NR_SACK_CHUNK_ID) )
{
tsnumber = tvb_get_ntohl((sctp_info->tvb)[chunk_number], SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET);
if (tsnumber < info->min_tsn2)
info->min_tsn2 = tsnumber;
if (tsnumber > info->max_tsn2)
info->max_tsn2 = tsnumber;
length = tvb_get_ntohs(sctp_info->tvb[chunk_number], CHUNK_LENGTH_OFFSET);
if (sack->first_tsn == 0)
sack->first_tsn = tsnumber;
t_s_n = (guint8 *)g_malloc(length);
tvb_memcpy(sctp_info->tvb[chunk_number], (guint8 *)(t_s_n),0, length);
sack->tsns = g_list_append(sack->tsns, t_s_n);
sackchunk = TRUE;
tsn_s = g_new(struct tsn_sort, 1);
tsn_s->tsnumber = tsnumber;
tsn_s->secs = tsn->secs = (guint32)pinfo->rel_ts.secs;
tsn_s->usecs = tsn->usecs = (guint32)pinfo->rel_ts.nsecs/1000;
tsn_s->offset = 0;
tsn_s->framenumber = framenumber;
tsn_s->length = tvb_get_ntohl(sctp_info->tvb[chunk_number], SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET);
if (tsn_s->length > info->max_window1)
info->max_window1 = tsn_s->length;
if (tsn->secs < info->min_secs)
{
info->min_secs = tsn->secs;
info->min_usecs = tsn->usecs;
}
else if (tsn->secs == info->min_secs && tsn->usecs < info->min_usecs)
info->min_usecs = tsn->usecs;
if (tsn->secs > info->max_secs)
{
info->max_secs = tsn->secs;
info->max_usecs = tsn->usecs;
}
else if (tsn->secs == info->max_secs && tsn->usecs > info->max_usecs)
info->max_usecs = tsn->usecs;
g_ptr_array_add(info->sort_sack2, tsn_s);
info->n_sack_chunks_ep2++;
}
}
}
if (info->verification_tag1 != 0 || info->verification_tag2 != 0)
{
guint32 number;
store = g_new(address, 1);
copy_address(store, &tmp_info.src);
info = add_address(store, info, info->direction);
store = g_new(address, 1);
copy_address(store, &tmp_info.dst);
if (info->direction == 1)
info = add_address(store, info, 2);
else
info = add_address(store, info, 1);
number = pinfo->num;
info->frame_numbers=g_list_prepend(info->frame_numbers, GUINT_TO_POINTER(number));
if (datachunk || forwardchunk) {
info->tsn1 = g_list_prepend(info->tsn1, tsn);
tsn_used = TRUE;
}
if (sackchunk == TRUE) {
info->sack2 = g_list_prepend(info->sack2, sack);
sack_used = TRUE;
}
sctp_tapinfo_struct.assoc_info_list = g_list_append(sctp_tapinfo_struct.assoc_info_list, info);
}
else
{
gchar* tmp_str;
error = g_new(sctp_error_info_t, 1);
error->frame_number = pinfo->num;
error->chunk_info[0] = '\0';
if ((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_CHUNK_ID)
{
tmp_str = val_to_str_wmem(NULL, tvb_get_guint8(sctp_info->tvb[0],0),chunk_type_values,"Reserved (%d)");
g_strlcpy(error->chunk_info, tmp_str, 200);
wmem_free(NULL, tmp_str);
}
else
{
for (chunk_number = 0; chunk_number < sctp_info->number_of_tvbs; chunk_number++)
{
tmp_str = val_to_str_wmem(NULL, tvb_get_guint8(sctp_info->tvb[chunk_number],0),chunk_type_values,"Reserved (%d)");
g_strlcat(error->chunk_info, tmp_str, 200);
wmem_free(NULL, tmp_str);
}
}
error->info_text = "INFOS";
info->error_info_list = g_list_append(info->error_info_list, error);
}
}
} /* endif (!info) */
else
{
guint32 number;
info->direction = sctp_info->direction;
if (info->verification_tag1 == 0 && info->verification_tag2 != sctp_info->verification_tag) {
info->verification_tag1 = sctp_info->verification_tag;
} else if (info->verification_tag2 == 0 && info->verification_tag1 != sctp_info->verification_tag) {
info->verification_tag2 = sctp_info->verification_tag;
}
if (((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_ACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_DATA_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_I_DATA_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_SACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_NR_SACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_FORWARD_TSN_CHUNK_ID))
{
tsn = g_new0(tsn_t, 1);
copy_address(&tsn->src, &tmp_info.src);
copy_address(&tsn->dst, &tmp_info.dst);
sack = g_new0(tsn_t, 1);
copy_address(&sack->src, &tmp_info.src);
copy_address(&sack->dst, &tmp_info.dst);
sack->secs=tsn->secs = (guint32)pinfo->rel_ts.secs;
sack->usecs=tsn->usecs = (guint32)pinfo->rel_ts.nsecs/1000;
if (((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_DATA_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_I_DATA_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_SACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_NR_SACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_FORWARD_TSN_CHUNK_ID))
{
if (tsn->secs < info->min_secs)
{
info->min_secs = tsn->secs;
info->min_usecs = tsn->usecs;
}
else if (tsn->secs == info->min_secs && tsn->usecs < info->min_usecs)
info->min_usecs = tsn->usecs;
if (tsn->secs > info->max_secs)
{
info->max_secs = tsn->secs;
info->max_usecs = tsn->usecs;
}
else if (tsn->secs == info->max_secs && tsn->usecs > info->max_usecs)
info->max_usecs = tsn->usecs;
}
sack->frame_number = tsn->frame_number = pinfo->num;
}
number = pinfo->num;
info->frame_numbers=g_list_prepend(info->frame_numbers, GUINT_TO_POINTER(number));
store = g_new(address, 1);
copy_address(store, &tmp_info.src);
switch (info->direction) {
case 1:
info = add_address(store, info, 1);
break;
case 2:
info = add_address(store, info, 2);
break;
default:
g_free(store);
break;
}
store = g_new(address, 1);
copy_address(store, &tmp_info.dst);
switch (info->direction) {
case 1:
info = add_address(store, info, 2);
break;
case 2:
info = add_address(store, info, 1);
break;
default:
g_free(store);
break;
}
if (((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_ACK_CHUNK_ID) ||
((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_CHUNK_ID))
{
tsnumber = tvb_get_ntohl((sctp_info->tvb)[chunk_number], INIT_CHUNK_INITIAL_TSN_OFFSET);
if (info->direction == 2)
{
if (tsnumber < info->min_tsn2)
info->min_tsn2 = tsnumber;
if (tsnumber > info->max_tsn2)
info->max_tsn2 = tsnumber;
info->instream2 = tvb_get_ntohs(sctp_info->tvb[0],INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET);
info->outstream2 = tvb_get_ntohs(sctp_info->tvb[0],INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET);
info->arwnd2 = tvb_get_ntohl(sctp_info->tvb[0],INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET);
info->tsn2 = g_list_prepend(info->tsn2, tsn);
tsn_used = TRUE;
}
else if (info->direction == 1)
{
if (tsnumber < info->min_tsn1)
info->min_tsn1 = tsnumber;
if (tsnumber > info->max_tsn1)
info->max_tsn1 = tsnumber;
info->instream1 = tvb_get_ntohs(sctp_info->tvb[0],INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET);
info->outstream1 = tvb_get_ntohs(sctp_info->tvb[0],INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET);
info->arwnd1 = tvb_get_ntohl(sctp_info->tvb[0],INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET);
info->tsn1 = g_list_prepend(info->tsn1, tsn);
tsn_used = TRUE;
}
idx = tvb_get_guint8(sctp_info->tvb[0],0);
if (!IS_SCTP_CHUNK_TYPE(idx))
idx = OTHER_CHUNKS_INDEX;
info->chunk_count[idx]++;
if (info->direction == 1)
info->ep1_chunk_count[idx]++;
else
info->ep2_chunk_count[idx]++;
info = add_chunk_count(&tmp_info.src, info, info->direction, idx);
for (chunk_number = 1; chunk_number < sctp_info->number_of_tvbs; chunk_number++)
{
type = tvb_get_ntohs(sctp_info->tvb[chunk_number],0);
if (type == IPV4ADDRESS_PARAMETER_ID)
{
store = g_new(address, 1);
alloc_address_tvb(NULL, store, AT_IPv4, 4, sctp_info->tvb[chunk_number], IPV4_ADDRESS_OFFSET);
info = add_address(store, info, info->direction);
}
else if (type == IPV6ADDRESS_PARAMETER_ID)
{
store = g_new(address, 1);
alloc_address_tvb(NULL, store, AT_IPv6, 16, sctp_info->tvb[chunk_number], IPV6_ADDRESS_OFFSET);
info = add_address(store, info, info->direction);
}
}
if (info->direction == 1) {
if (info->dir1->init || info->dir1->initack) {
info->init_collision = TRUE;
}
if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_CHUNK_ID) {
info->dir1->init = TRUE;
info->dir1->init_min_tsn = tvb_get_ntohl((sctp_info->tvb)[0], INIT_CHUNK_INITIAL_TSN_OFFSET);
info->min_tsn1 = info->dir1->init_min_tsn;
info->dir1->init_vtag = tvb_get_ntohl(sctp_info->tvb[0], INIT_CHUNK_INITIATE_TAG_OFFSET);
} else if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_ACK_CHUNK_ID) {
info->dir1->initack = TRUE;
info->dir1->initack_min_tsn = tvb_get_ntohl((sctp_info->tvb)[0], INIT_CHUNK_INITIAL_TSN_OFFSET);
info->min_tsn1 = info->dir1->initack_min_tsn;
info->dir1->initack_vtag = tvb_get_ntohl(sctp_info->tvb[0], INIT_CHUNK_INITIATE_TAG_OFFSET);
}
} else {
if (info->dir2->init || info->dir2->initack) {
info->init_collision = TRUE;
}
if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_CHUNK_ID) {
info->dir2->init = TRUE;
info->dir2->init_min_tsn = tvb_get_ntohl((sctp_info->tvb)[0], INIT_CHUNK_INITIAL_TSN_OFFSET);
info->min_tsn2 = info->dir2->init_min_tsn;
info->dir2->init_vtag = tvb_get_ntohl(sctp_info->tvb[0], INIT_CHUNK_INITIATE_TAG_OFFSET);
} else if (tvb_get_guint8(sctp_info->tvb[0],0) == SCTP_INIT_ACK_CHUNK_ID) {
info->dir2->initack = TRUE;
info->dir2->initack_min_tsn = tvb_get_ntohl((sctp_info->tvb)[0], INIT_CHUNK_INITIAL_TSN_OFFSET);
info->min_tsn2 = info->dir2->initack_min_tsn;
info->dir2->initack_vtag = tvb_get_ntohl(sctp_info->tvb[0], INIT_CHUNK_INITIATE_TAG_OFFSET);
}
}
if ((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_ACK_CHUNK_ID)
{
info->initack = TRUE;
info->initack_dir = info->direction;
}
else if ((tvb_get_guint8(sctp_info->tvb[0],0)) == SCTP_INIT_CHUNK_ID)
{
info->init = TRUE;
}
}
else
{
if (((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_INIT_ACK_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_DATA_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_I_DATA_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_SACK_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_NR_SACK_CHUNK_ID) &&
((tvb_get_guint8(sctp_info->tvb[0],0)) != SCTP_FORWARD_TSN_CHUNK_ID))
{
if (!sack)
sack = g_new0(tsn_t, 1);
sack->tsns = NULL;
sack->first_tsn = 0;
if (!tsn)
tsn = g_new0(tsn_t, 1);
tsn->tsns = NULL;
tsn->first_tsn = 0;
}
for (chunk_number = 0; chunk_number < sctp_info->number_of_tvbs; chunk_number++)
{
idx = tvb_get_guint8(sctp_info->tvb[chunk_number],0);
if (!IS_SCTP_CHUNK_TYPE(idx))
idx = OTHER_CHUNKS_INDEX;
info->chunk_count[idx]++;
if (info->direction == 1)
info->ep1_chunk_count[idx]++;
else
info->ep2_chunk_count[idx]++;
info = add_chunk_count(&tmp_info.src, info,info->direction, idx);
if ((tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_DATA_CHUNK_ID) ||
(tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_I_DATA_CHUNK_ID))
datachunk = TRUE;
if (tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_FORWARD_TSN_CHUNK_ID)
forwardchunk = TRUE;
if ((datachunk || forwardchunk) && tsn != NULL)
{
tsnumber = tvb_get_ntohl((sctp_info->tvb)[chunk_number], DATA_CHUNK_TSN_OFFSET);
if (tsn->first_tsn == 0)
tsn->first_tsn = tsnumber;
if (datachunk)
{
t_s_n = (guint8 *)g_malloc(16);
tvb_memcpy(sctp_info->tvb[chunk_number], (guint8 *)(t_s_n),0, 16);
if (tvb_get_guint8(sctp_info->tvb[chunk_number],0) == SCTP_DATA_CHUNK_ID) {
length=tvb_get_ntohs(sctp_info->tvb[chunk_number], CHUNK_LENGTH_OFFSET)-DATA_CHUNK_HEADER_LENGTH;
} else {
length = tvb_get_ntohs(sctp_info->tvb[chunk_number], CHUNK_LENGTH_OFFSET) - I_DATA_CHUNK_HEADER_LENGTH;
}
info->n_data_chunks++;
info->n_data_bytes+=length;
}
else
{
length=tvb_get_ntohs(sctp_info->tvb[chunk_number], CHUNK_LENGTH_OFFSET);
t_s_n = (guint8 *)g_malloc(length);