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use se_trees instead of GHashTables, 

rename binding into assoc(iation) which is the AOC name.
move the definition of sccp_assoc_t to packet-sccp.h so that information regarding sccp associations it can be used by user protocols



svn path=/trunk/; revision=17590
This commit is contained in:
Luis Ontanon 2006-03-11 15:30:52 +00:00
parent 01bf34cb88
commit 19f81800ba
3 changed files with 160 additions and 88 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
epan/dissectors/Makefile.common
View File

@ -873,6 +873,7 @@ DISSECTOR_INCLUDES = \
packet-rwall.h \
packet-rx.h \
packet-s4406.h \
packet-sccp.h \
packet-scsi.h \
packet-sctp.h \
packet-sdp.h \

198
epan/dissectors/packet-sccp.c
View File

@ -47,13 +47,7 @@
#include <epan/emem.h>
#include <epan/reassemble.h>
#include "packet-tcap.h"
typedef struct _sccp_binding_info_t {
gchar* calling_key;
gchar* called_key;
guint8 calling_ssn;
guint8 called_ssn;
} sccp_binding_info_t;
#include "packet-sccp.h"
static Standard_Type decode_mtp3_standard;
#define SCCP_SI 3
@ -733,74 +727,107 @@ static guint slr = 0;
static dissector_handle_t data_handle;
static dissector_table_t sccp_ssn_dissector_table;
static GHashTable* bindings = NULL;
sccp_binding_info_t* binding;
sccp_binding_info_t no_binding = {NULL,NULL,0,0};
static se_tree_t* assocs = NULL;
sccp_assoc_info_t* assoc;
sccp_assoc_info_t no_assoc = {0,0,0,0,FALSE,FALSE,SCCP_PLOAD_NONE,NULL};
static sccp_binding_info_t* sccp_binding(address* opc, address* dpc, guint src_lr, guint dst_lr) {
if (binding)
return binding;
static sccp_assoc_info_t* sccp_assoc(address* opc, address* dpc, guint src_lr, guint dst_lr) {
guint32 opck, dpck;
if (assoc)
return assoc;
if (!src_lr && !dst_lr)
return &no_binding;
return &no_assoc;
opck = opc->type == AT_SS7PC ? mtp3_pc_hash(opc->data) : g_str_hash(address_to_str(opc));
dpck = dpc->type == AT_SS7PC ? mtp3_pc_hash(dpc->data) : g_str_hash(address_to_str(dpc));
switch (message_type) {
case MESSAGE_TYPE_CR:
{
gchar* key = ep_strdup_printf("%s->%s:%u",address_to_str(dpc),address_to_str(opc),src_lr);
if (! ( binding = g_hash_table_lookup(bindings,key) ) ) {
binding = se_alloc(sizeof(sccp_binding_info_t));
se_tree_key_t key[] = {
{1,&dpck},
{1,&opck},
{1,&src_lr},
{0,NULL}
};
if (! ( assoc = se_tree_lookup32_array(assocs,key) ) ) {
assoc = se_alloc(sizeof(sccp_assoc_info_t));
binding->calling_key = se_strdup(key);
binding->called_key = NULL;
binding->calling_ssn = INVALID_SSN;
binding->called_ssn = INVALID_SSN;
g_hash_table_insert(bindings,binding->calling_key,binding);
assoc->calling_dpc = dpck;
assoc->called_dpc = opck;
assoc->calling_ssn = INVALID_SSN;
assoc->called_ssn = INVALID_SSN;
assoc->has_calling_key = FALSE;
assoc->has_called_key = TRUE;
assoc->pload = SCCP_PLOAD_NONE;
assoc->private_data = NULL;
se_tree_insert32_array(assocs,key,assoc);
}
break;
}
case MESSAGE_TYPE_CC:
{
gchar* called_key = ep_strdup_printf("%s->%s:%u",address_to_str(dpc),address_to_str(opc),src_lr);
gchar* calling_key = ep_strdup_printf("%s->%s:%u",address_to_str(opc),address_to_str(dpc),dst_lr);
if (( binding = g_hash_table_lookup(bindings,calling_key) )) {
if ( ! binding->called_key ) {
binding->called_key = se_strdup(called_key);
g_hash_table_insert(bindings,binding->called_key,binding);
se_tree_key_t called_key[] = {
{1,&dpck},
{1,&opck},
{1,&src_lr},
{0,NULL}
};
se_tree_key_t calling_key[] = {
{1,&opck},
{1,&dpck},
{1,&dst_lr},
{0,NULL}
};
if (( assoc = se_tree_lookup32_array(assocs,calling_key) )) {
if ( ! assoc->has_called_key ) {
se_tree_insert32_array(assocs,called_key,assoc);
assoc->has_called_key = TRUE;
}
} else if (( binding = g_hash_table_lookup(bindings,called_key) )) {
if ( ! binding->calling_key ) {
binding->calling_key = se_strdup(calling_key);
g_hash_table_insert(bindings,binding->calling_key,binding);
} else if (( assoc = se_tree_lookup32_array(assocs,called_key) )) {
if ( ! assoc->has_calling_key ) {
se_tree_insert32_array(assocs,calling_key,assoc);
assoc->has_calling_key = TRUE;
}
} else {
binding = se_alloc(sizeof(sccp_binding_info_t));
assoc = se_alloc(sizeof(sccp_assoc_info_t));
binding->calling_key = se_strdup(calling_key);
binding->called_key = se_strdup(called_key);
binding->calling_ssn = INVALID_SSN;
binding->called_ssn = INVALID_SSN;
g_hash_table_insert(bindings,binding->calling_key,binding);
g_hash_table_insert(bindings,binding->called_key,binding);
assoc->calling_dpc = dpck;
assoc->called_dpc = opck;
assoc->calling_ssn = INVALID_SSN;
assoc->called_ssn = INVALID_SSN;
assoc->has_calling_key = TRUE;
assoc->has_called_key = TRUE;
assoc->pload = SCCP_PLOAD_NONE;
assoc->private_data = NULL;
se_tree_insert32_array(assocs,calling_key,assoc);
se_tree_insert32_array(assocs,called_key,assoc);
}
break;
}
default:
{
gchar* fw_key = ep_strdup_printf("%s->%s:%u",address_to_str(opc),address_to_str(dpc),dst_lr);
binding = g_hash_table_lookup(bindings,fw_key);
se_tree_key_t calling_key[] = {
{1,&opck},
{1,&dpck},
{1,&dst_lr},
{0,NULL}
};
assoc = se_tree_lookup32_array(assocs,calling_key);
break;
}
}
return binding ? binding : &no_binding;
return assoc ? assoc : &no_assoc;
}
@ -1052,7 +1079,6 @@ dissect_sccp_called_calling_param(tvbuff_t *tvb, proto_tree *tree,
guint32 dpc;
tvbuff_t *gt_tvb;
dissector_handle_t ssn_dissector = NULL, tcap_ssn_dissector = NULL;
dissector_table_t tcap_ssn_dissector_table = NULL;
const char *ssn_dissector_short_name = NULL;
const char *tcap_ssn_dissector_short_name = NULL;
@ -1126,10 +1152,10 @@ dissect_sccp_called_calling_param(tvbuff_t *tvb, proto_tree *tree,
if (ssni) {
ssn = tvb_get_guint8(tvb, offset);
if (called) {
if (binding) binding->called_ssn = ssn;
if (assoc) assoc->called_ssn = ssn;
}
else {
if (binding) binding->calling_ssn = ssn;
if (assoc) assoc->calling_ssn = ssn;
}
proto_tree_add_uint(call_tree, called ? hf_sccp_called_ssn
@ -1196,10 +1222,10 @@ dissect_sccp_called_calling_param(tvbuff_t *tvb, proto_tree *tree,
if (ssni) {
ssn = tvb_get_guint8(tvb, offset);
if (called) {
if (binding) binding->called_ssn = ssn;
if (assoc) assoc->called_ssn = ssn;
}
else {
if (binding) binding->calling_ssn = ssn;
if (assoc) assoc->calling_ssn = ssn;
}
proto_tree_add_uint(call_tree, called ? hf_sccp_called_ssn
@ -1360,21 +1386,21 @@ dissect_sccp_data_param(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 ssn;
if (binding) {
if (assoc) {
switch (pinfo->p2p_dir) {
case P2P_DIR_SENT:
ssn = binding->calling_ssn;
ssn = assoc->calling_ssn;
break;
case P2P_DIR_RECV:
ssn = binding->called_ssn;
ssn = assoc->called_ssn;
break;
default:
ssn = binding->called_ssn;
if (ssn == INVALID_SSN) ssn = binding->calling_ssn;
ssn = assoc->called_ssn;
if (ssn == INVALID_SSN) ssn = assoc->calling_ssn;
break;
}
} else {
ssn = binding->called_ssn;
ssn = assoc->called_ssn;
}
@ -1507,7 +1533,7 @@ dissect_sccp_parameter(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
case PARAMETER_DESTINATION_LOCAL_REFERENCE:
/* These parameters must be dissected even if !sccp_tree (so that
* binding information can be created).
* assoc information can be created).
*/
break;
@ -1764,7 +1790,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
/* Starting a new message dissection; clear the global SSN and DLR values */
dlr = 0;
slr = 0;
binding = NULL;
assoc = NULL;
switch(message_type) {
case MESSAGE_TYPE_CR:
@ -1774,7 +1800,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
PROTOCOL_CLASS_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH)
OPTIONAL_POINTER(POINTER_LENGTH)
@ -1799,7 +1825,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
@ -1813,7 +1839,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_REFUSAL_CAUSE, offset,
@ -1830,14 +1856,14 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RELEASE_CAUSE, offset,
RELEASE_CAUSE_LENGTH);
OPTIONAL_POINTER(POINTER_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
break;
case MESSAGE_TYPE_RLC:
@ -1849,7 +1875,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
break;
@ -1860,7 +1886,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
more = tvb_get_guint8(tvb, offset) & SEGMENTING_REASSEMBLING_MASK;
@ -1913,7 +1939,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SEQUENCING_SEGMENTING, offset,
@ -1925,14 +1951,14 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RECEIVE_SEQUENCE_NUMBER,
offset, RECEIVE_SEQUENCE_NUMBER_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CREDIT, offset, CREDIT_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
break;
case MESSAGE_TYPE_UDT:
@ -1943,7 +1969,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
VARIABLE_POINTER(variable_pointer2, hf_sccp_variable_pointer2, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH)
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
@ -1965,7 +1991,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
VARIABLE_POINTER(variable_pointer2, hf_sccp_variable_pointer2, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH)
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
@ -1985,7 +2011,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH);
@ -1998,7 +2024,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
break;
@ -2013,7 +2039,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RESET_CAUSE, offset,
RESET_CAUSE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
break;
case MESSAGE_TYPE_RSC:
@ -2024,7 +2050,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
break;
case MESSAGE_TYPE_ERR:
@ -2035,7 +2061,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_ERROR_CAUSE, offset,
ERROR_CAUSE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
break;
case MESSAGE_TYPE_IT:
@ -2046,7 +2072,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
PROTOCOL_CLASS_LENGTH);
@ -2074,7 +2100,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
* NOTE 2 - Segmentation Should not be present in case of a single XUDT message.
*/
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
@ -2152,7 +2178,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH)
OPTIONAL_POINTER(POINTER_LENGTH)
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
@ -2179,7 +2205,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH_LONG)
OPTIONAL_POINTER(POINTER_LENGTH_LONG)
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
@ -2208,7 +2234,7 @@ dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH_LONG)
OPTIONAL_POINTER(POINTER_LENGTH_LONG)
binding = sccp_binding(&(pinfo->src), &(pinfo->dst), slr, dlr);
assoc = sccp_assoc(&(pinfo->src), &(pinfo->dst), slr, dlr);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
@ -2315,12 +2341,6 @@ dissect_sccp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
}
static void init_sccp(void) {
if (bindings) {
g_hash_table_destroy(bindings);
}
bindings = g_hash_table_new(g_str_hash,g_str_equal);
fragment_table_init (&sccp_xudt_msg_fragment_table);
reassembled_table_init(&sccp_xudt_msg_reassembled_table);
}
@ -2745,6 +2765,8 @@ proto_register_sccp(void)
register_init_routine(&init_sccp);
assocs = se_tree_create(SE_TREE_TYPE_RED_BLACK, "sccp_associations");
}
void

49
epan/dissectors/packet-sccp.h Normal file
View File

@ -0,0 +1,49 @@
/* packet-sccp.h
* Definitions for Signalling Connection Control Part (SCCP) dissection
*
* $Id: $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __PACKET_SCCP_H
#define __PACKET_SCCP_H
typedef enum _sccp_payload_t {
SCCP_PLOAD_NONE,
SCCP_PLOAD_RANAP,
SCCP_PLOAD_TCAP,
SCCP_PLOAD_CAMEL
} sccp_payload_t;
/* obscure to SCCP, to be defined by users */
typedef struct _sccp_payload_data_t sccp_payload_data_t;
typedef struct _sccp_assoc_info_t {
guint32 calling_dpc;
guint32 called_dpc;
guint8 calling_ssn;
guint8 called_ssn;
gboolean has_calling_key;
gboolean has_called_key;
sccp_payload_t pload;
sccp_payload_data_t* private_data;
} sccp_assoc_info_t;
#endif