8032fa8a1b
files to get that big. From Thomas Wittwer and Matthias Nyffenegger: Support for "ring buffer mode", wherein there's a ring buffer of N capture files; as each capture file reaches its maximum size (the ring buffer works only with a maximum capture file size specified), Ethereal rolls over to the next capture file in the ring buffer, replacing whatever packets might be in it with new packets. svn path=/trunk/; revision=4323
209 lines
7.5 KiB
C
209 lines
7.5 KiB
C
/* capture_stop_conditions.c
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* Implementation for 'stop condition handler'.
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*
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* $Id: capture_stop_conditions.c,v 1.2 2001/12/04 08:25:55 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <time.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <stdarg.h>
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#include "conditions.h"
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#include "capture_stop_conditions.h"
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/* predefined classes function prototypes */
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static condition* _cnd_constr_timeout(condition*, va_list);
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static void _cnd_destr_timeout(condition*);
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static gboolean _cnd_eval_timeout(condition*, va_list);
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static void _cnd_reset_timeout(condition*);
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static condition* _cnd_constr_capturesize(condition*, va_list);
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static void _cnd_destr_capturesize(condition*);
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static gboolean _cnd_eval_capturesize(condition*, va_list);
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static void _cnd_reset_capturesize(condition*);
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void init_capture_stop_conditions(void){
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cnd_register_class(CND_CLASS_TIMEOUT,
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_cnd_constr_timeout,
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_cnd_destr_timeout,
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_cnd_eval_timeout,
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_cnd_reset_timeout);
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cnd_register_class(CND_CLASS_CAPTURESIZE,
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_cnd_constr_capturesize,
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_cnd_destr_capturesize,
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_cnd_eval_capturesize,
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_cnd_reset_capturesize);
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} /* END init_capture_stop_conditions() */
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void cleanup_capture_stop_conditions(void){
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cnd_unregister_class(CND_CLASS_TIMEOUT);
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cnd_unregister_class(CND_CLASS_CAPTURESIZE);
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} /* END cleanup_capture_stop_conditions() */
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/*****************************************************************************/
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/* Predefined condition 'timeout'. */
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/* class id */
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const char* CND_CLASS_TIMEOUT = "cnd_class_timeout";
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/* structure that contains user supplied data for this condition */
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typedef struct _cnd_timeout_dat{
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time_t start_time;
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gint32 timeout_s;
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}cnd_timeout_dat;
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/*
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* Constructs new condition for timeout check. This function is invoked by
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* 'cnd_new()' in order to perform class specific initialization.
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*
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* parameter: cnd - Pointer to condition passed by 'cnd_new()'.
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* ap - Pointer to user supplied arguments list for this
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* constructor.
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* returns: Pointer to condition - Construction was successful.
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* NULL - Construction failed.
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*/
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static condition* _cnd_constr_timeout(condition* cnd, va_list ap){
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cnd_timeout_dat *data = NULL;
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/* allocate memory */
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if((data = (cnd_timeout_dat*)malloc(sizeof(cnd_timeout_dat))) == NULL)
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return NULL;
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/* initialize user data */
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data->start_time = time(NULL);
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data->timeout_s = va_arg(ap, gint32);
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cnd_set_user_data(cnd, (void*)data);
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return cnd;
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} /* END _cnd_constr_timeout() */
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/*
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* Destroys condition for timeout check. This function is invoked by
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* 'cnd_delete()' in order to perform class specific clean up.
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*
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* parameter: cnd - Pointer to condition passed by 'cnd_delete()'.
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*/
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static void _cnd_destr_timeout(condition* cnd){
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/* free memory */
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free(cnd_get_user_data(cnd));
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} /* END _cnd_destr_timeout() */
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/*
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* Condition handler for timeout condition. This function is invoked by
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* 'cnd_eval()' in order to perform class specific condition checks.
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*
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* parameter: cnd - The inititalized timeout condition.
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* ap - Pointer to user supplied arguments list for this
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* handler.
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* returns: TRUE - Condition is true.
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* FALSE - Condition is false.
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*/
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static gboolean _cnd_eval_timeout(condition* cnd, va_list ap){
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cnd_timeout_dat* data = (cnd_timeout_dat*)cnd_get_user_data(cnd);
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gint32 elapsed_time;
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/* check timeout here */
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if(data->timeout_s == 0) return FALSE; /* 0 == infinite */
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elapsed_time = time(NULL) - data->start_time;
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if(elapsed_time > data->timeout_s) return TRUE;
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return FALSE;
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} /* END _cnd_eval_timeout()*/
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/*
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* Call this function to reset this condition to its initial state, i.e. the
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* state it was in right after creation.
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*
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* parameter: cnd - Pointer to an initialized condition.
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*/
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static void _cnd_reset_timeout(condition *cnd){
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((cnd_timeout_dat*)cnd_get_user_data(cnd))->start_time = time(NULL);
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} /* END _cnd_reset_timeout() */
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/*****************************************************************************/
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/* Predefined condition 'max. capturesize'. */
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/* class id */
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const char* CND_CLASS_CAPTURESIZE = "cnd_class_capturesize";
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/* structure that contains user supplied data for this condition */
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typedef struct _cnd_capturesize_dat{
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long max_capture_size;
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}cnd_capturesize_dat;
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/*
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* Constructs new condition for capturesize check. This function is invoked by
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* 'cnd_new()' in order to perform class specific initialization.
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*
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* parameter: cnd - Pointer to condition passed by 'cnd_new()'.
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* ap - Pointer to user supplied arguments list for this
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* constructor.
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* returns: Pointer to condition - Construction was successful.
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* NULL - Construction failed.
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*/
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static condition* _cnd_constr_capturesize(condition* cnd, va_list ap){
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cnd_capturesize_dat *data = NULL;
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/* allocate memory */
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if((data = (cnd_capturesize_dat*)malloc(sizeof(cnd_capturesize_dat))) == NULL)
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return NULL;
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/* initialize user data */
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data->max_capture_size = va_arg(ap, long);
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cnd_set_user_data(cnd, (void*)data);
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return cnd;
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} /* END _cnd_constr_capturesize() */
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/*
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* Destroys condition for capturesize check. This function is invoked by
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* 'cnd_delete()' in order to perform class specific clean up.
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*
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* parameter: cnd - Pointer to condition passed by 'cnd_delete()'.
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*/
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static void _cnd_destr_capturesize(condition* cnd){
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/* free memory */
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free(cnd_get_user_data(cnd));
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} /* END _cnd_destr_capturesize() */
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/*
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* Condition handler for capturesize condition. This function is invoked by
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* 'cnd_eval()' in order to perform class specific condition checks.
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*
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* parameter: cnd - The inititalized capturesize condition.
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* ap - Pointer to user supplied arguments list for this
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* handler.
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* returns: TRUE - Condition is true.
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* FALSE - Condition is false.
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*/
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static gboolean _cnd_eval_capturesize(condition* cnd, va_list ap){
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cnd_capturesize_dat* data = (cnd_capturesize_dat*)cnd_get_user_data(cnd);
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/* check capturesize here */
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if(data->max_capture_size == 0) return FALSE; /* 0 == infinite */
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if(va_arg(ap, long) >= data->max_capture_size){
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return TRUE;
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}
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return FALSE;
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} /* END _cnd_eval_capturesize() */
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/*
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* Call this function to reset this condition to its initial state, i.e. the
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* state it was in right after creation.
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*
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* parameter: cnd - Pointer to an initialized condition.
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*/
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static void _cnd_reset_capturesize(condition *cnd){
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} /* END _cnd_reset_capturesize() */
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