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