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/*
* Copyright (c) 2018 The TCPDUMP project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code
* distributions retain the above copyright notice and this paragraph
* in its entirety, and (2) distributions including binary code include
* the above copyright notice and this paragraph in its entirety in
* the documentation or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*/
#include <config.h>
#include <stdlib.h>
#include "netdissect-alloc.h"
static void nd_add_alloc_list(netdissect_options *, nd_mem_chunk_t *);
/*
* nd_free_all() is intended to be used after a packet printing
*/
/* Add a memory chunk in allocation linked list */
static void
nd_add_alloc_list(netdissect_options *ndo, nd_mem_chunk_t *chunkp)
{
if (ndo->ndo_last_mem_p == NULL) /* first memory allocation */
chunkp->prev_mem_p = NULL;
else /* previous memory allocation */
chunkp->prev_mem_p = ndo->ndo_last_mem_p;
ndo->ndo_last_mem_p = chunkp;
}
/* malloc replacement, with tracking in a linked list */
void *
nd_malloc(netdissect_options *ndo, size_t size)
{
nd_mem_chunk_t *chunkp = malloc(sizeof(nd_mem_chunk_t) + size);
if (chunkp == NULL)
return NULL;
nd_add_alloc_list(ndo, chunkp);
return chunkp + 1;
}
/* Free chunks in allocation linked list from last to first */
void
nd_free_all(netdissect_options *ndo)
{
nd_mem_chunk_t *current, *previous;
current = ndo->ndo_last_mem_p;
while (current != NULL) {
previous = current->prev_mem_p;
free(current);
current = previous;
}
ndo->ndo_last_mem_p = NULL;
}
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