forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
of 16 bytes. Use "sizeof" for the size of e_guid_t's, and use structure assignment to copy GUID values. Make functions such as append_h225ras_call() and new_h225ras_call() take pointers to e_guid_t's as arguments. Define GUID_LEN in epan/guid-utils.h and use it as the length of a GUID in a packet. (Note that "sizeof e_guid_t" is not guaranteed to be 16, although it is guaranteed to be the size of an e_guid_t.) When constructing a display filter that matches a GUID, use guid_to_str() to construct the string for the GUID. svn path=/trunk/; revision=17676
154 lines
4.5 KiB
C
154 lines
4.5 KiB
C
/*
|
|
* h225-persistentdata.c
|
|
* Source for lists and hash tables used in ethereal's h225 dissector
|
|
* for calculation of delays in h225-calls
|
|
*
|
|
* Copyright 2003 Lars Roland
|
|
*
|
|
* $Id$
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
#include <epan/packet.h>
|
|
#include <epan/conversation.h>
|
|
#include <epan/emem.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "h225-persistentdata.h"
|
|
|
|
/* Global Memory Chunks for lists and Global hash tables*/
|
|
|
|
static GHashTable *ras_calls[7] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
|
|
|
|
/*
|
|
* Functions needed for Ras-Hash-Table
|
|
*/
|
|
|
|
/* compare 2 keys */
|
|
static gint h225ras_call_equal(gconstpointer k1, gconstpointer k2)
|
|
{
|
|
const h225ras_call_info_key* key1 = (const h225ras_call_info_key*) k1;
|
|
const h225ras_call_info_key* key2 = (const h225ras_call_info_key*) k2;
|
|
|
|
return (key1->reqSeqNum == key2->reqSeqNum &&
|
|
key1->conversation == key2->conversation);
|
|
}
|
|
|
|
/* calculate a hash key */
|
|
static guint h225ras_call_hash(gconstpointer k)
|
|
{
|
|
const h225ras_call_info_key* key = (const h225ras_call_info_key*) k;
|
|
|
|
return key->reqSeqNum + GPOINTER_TO_UINT(key->conversation);
|
|
}
|
|
|
|
|
|
h225ras_call_t * find_h225ras_call(h225ras_call_info_key *h225ras_call_key ,int category)
|
|
{
|
|
h225ras_call_t *h225ras_call = NULL;
|
|
h225ras_call = (h225ras_call_t *)g_hash_table_lookup(ras_calls[category], h225ras_call_key);
|
|
|
|
return h225ras_call;
|
|
}
|
|
|
|
h225ras_call_t * new_h225ras_call(h225ras_call_info_key *h225ras_call_key, packet_info *pinfo, e_guid_t *guid, int category)
|
|
{
|
|
h225ras_call_info_key *new_h225ras_call_key;
|
|
h225ras_call_t *h225ras_call = NULL;
|
|
|
|
|
|
/* Prepare the value data.
|
|
"req_num" and "rsp_num" are frame numbers;
|
|
frame numbers are 1-origin, so we use 0
|
|
to mean "we don't yet know in which frame
|
|
the reply for this call appears". */
|
|
new_h225ras_call_key = se_alloc(sizeof(h225ras_call_info_key));
|
|
new_h225ras_call_key->reqSeqNum = h225ras_call_key->reqSeqNum;
|
|
new_h225ras_call_key->conversation = h225ras_call_key->conversation;
|
|
h225ras_call = se_alloc(sizeof(h225ras_call_t));
|
|
h225ras_call->req_num = pinfo->fd->num;
|
|
h225ras_call->rsp_num = 0;
|
|
h225ras_call->requestSeqNum = h225ras_call_key->reqSeqNum;
|
|
h225ras_call->responded = FALSE;
|
|
h225ras_call->next_call = NULL;
|
|
h225ras_call->req_time=pinfo->fd->abs_ts;
|
|
h225ras_call->guid=*guid;
|
|
/* store it */
|
|
g_hash_table_insert(ras_calls[category], new_h225ras_call_key, h225ras_call);
|
|
|
|
return h225ras_call;
|
|
}
|
|
|
|
h225ras_call_t * append_h225ras_call(h225ras_call_t *prev_call, packet_info *pinfo, e_guid_t *guid, int category _U_)
|
|
{
|
|
h225ras_call_t *h225ras_call = NULL;
|
|
|
|
/* Prepare the value data.
|
|
"req_num" and "rsp_num" are frame numbers;
|
|
frame numbers are 1-origin, so we use 0
|
|
to mean "we don't yet know in which frame
|
|
the reply for this call appears". */
|
|
h225ras_call = se_alloc(sizeof(h225ras_call_t));
|
|
h225ras_call->req_num = pinfo->fd->num;
|
|
h225ras_call->rsp_num = 0;
|
|
h225ras_call->requestSeqNum = prev_call->requestSeqNum;
|
|
h225ras_call->responded = FALSE;
|
|
h225ras_call->next_call = NULL;
|
|
h225ras_call->req_time=pinfo->fd->abs_ts;
|
|
h225ras_call->guid=*guid;
|
|
|
|
prev_call->next_call = h225ras_call;
|
|
return h225ras_call;
|
|
}
|
|
|
|
|
|
/* Init routine for hash tables and delay calculation
|
|
This routine will be called by Ethereal, before it
|
|
is (re-)dissecting a trace file from beginning.
|
|
We need to discard and init any state we've saved */
|
|
|
|
void
|
|
h225_init_routine(void)
|
|
{
|
|
int i;
|
|
|
|
/* free hash-tables for RAS SRT */
|
|
for(i=0;i<7;i++) {
|
|
if (ras_calls[i] != NULL) {
|
|
g_hash_table_destroy(ras_calls[i]);
|
|
ras_calls[i] = NULL;
|
|
}
|
|
}
|
|
|
|
/* create new hash-tables for RAS SRT */
|
|
|
|
for(i=0;i<7;i++) {
|
|
ras_calls[i] = g_hash_table_new(h225ras_call_hash, h225ras_call_equal);
|
|
}
|
|
|
|
}
|