Diff: wolfcrypt/src/memory.c

Revision:

17:ff9d1e86ad5f

Parent:

16:048e5e270a58

--- a/wolfcrypt/src/memory.c	Tue Nov 19 14:32:16 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,955 +0,0 @@
-/* memory.c
- *
- * Copyright (C) 2006-2017 wolfSSL Inc.
- *
- * This file is part of wolfSSL.
- *
- * wolfSSL 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.
- *
- * wolfSSL 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
- */
-
-
-#ifdef HAVE_CONFIG_H
-    #include <config.h>
-#endif
-
-#include <wolfssl/wolfcrypt/settings.h>
-
-/* check old macros @wc_fips */
-#if defined(USE_CYASSL_MEMORY) && !defined(USE_WOLFSSL_MEMORY)
-    #define USE_WOLFSSL_MEMORY
-#endif
-#if defined(CYASSL_MALLOC_CHECK) && !defined(WOLFSSL_MALLOC_CHECK)
-    #define WOLFSSL_MALLOC_CHECK
-#endif
-
-#ifdef USE_WOLFSSL_MEMORY
-
-#include <wolfssl/wolfcrypt/memory.h>
-#include <wolfssl/wolfcrypt/error-crypt.h>
-#include <wolfssl/wolfcrypt/logging.h>
-
-#if defined(WOLFSSL_MALLOC_CHECK) || defined(WOLFSSL_TRACK_MEMORY_FULL)
-    #include <stdio.h>
-#endif
-
-
-/* Set these to default values initially. */
-static wolfSSL_Malloc_cb  malloc_function = NULL;
-static wolfSSL_Free_cb    free_function = NULL;
-static wolfSSL_Realloc_cb realloc_function = NULL;
-
-int wolfSSL_SetAllocators(wolfSSL_Malloc_cb  mf,
-                          wolfSSL_Free_cb    ff,
-                          wolfSSL_Realloc_cb rf)
-{
-    int res = 0;
-
-    if (mf)
-        malloc_function = mf;
-    else
-        res = BAD_FUNC_ARG;
-
-    if (ff)
-        free_function = ff;
-    else
-        res = BAD_FUNC_ARG;
-
-    if (rf)
-        realloc_function = rf;
-    else
-        res = BAD_FUNC_ARG;
-
-    return res;
-}
-
-int wolfSSL_ResetAllocators(void)
-{
-    /* allow nulls to be set for callbacks to restore defaults */
-    malloc_function = NULL;
-    free_function = NULL;
-    realloc_function = NULL;
-
-    return 0;
-}
-
-int wolfSSL_GetAllocators(wolfSSL_Malloc_cb*  mf,
-                          wolfSSL_Free_cb*    ff,
-                          wolfSSL_Realloc_cb* rf)
-{
-    if (mf) *mf = malloc_function;
-    if (ff) *ff = free_function;
-    if (rf) *rf = realloc_function;
-    return 0;
-}
-
-#ifndef WOLFSSL_STATIC_MEMORY
-#ifdef WOLFSSL_DEBUG_MEMORY
-void* wolfSSL_Malloc(size_t size, const char* func, unsigned int line)
-#else
-void* wolfSSL_Malloc(size_t size)
-#endif
-{
-    void* res = 0;
-
-    if (malloc_function) {
-    #ifdef WOLFSSL_DEBUG_MEMORY
-        res = malloc_function(size, func, line);
-    #else
-        res = malloc_function(size);
-    #endif
-    }
-    else {
-    #ifndef WOLFSSL_NO_MALLOC
-        res = malloc(size);
-    #else
-        WOLFSSL_MSG("No malloc available");
-    #endif
-    }
-
-    #ifdef WOLFSSL_MALLOC_CHECK
-        if (res == NULL)
-            puts("wolfSSL_malloc failed");
-    #endif
-
-    return res;
-}
-
-#ifdef WOLFSSL_DEBUG_MEMORY
-void wolfSSL_Free(void *ptr, const char* func, unsigned int line)
-#else
-void wolfSSL_Free(void *ptr)
-#endif
-{
-    if (free_function) {
-    #ifdef WOLFSSL_DEBUG_MEMORY
-        free_function(ptr, func, line);
-    #else
-        free_function(ptr);
-    #endif
-    }
-    else {
-    #ifndef WOLFSSL_NO_MALLOC
-        free(ptr);
-    #else
-        WOLFSSL_MSG("No free available");
-    #endif
-    }
-}
-
-#ifdef WOLFSSL_DEBUG_MEMORY
-void* wolfSSL_Realloc(void *ptr, size_t size, const char* func, unsigned int line)
-#else
-void* wolfSSL_Realloc(void *ptr, size_t size)
-#endif
-{
-    void* res = 0;
-
-    if (realloc_function) {
-    #ifdef WOLFSSL_DEBUG_MEMORY
-        res = realloc_function(ptr, size, func, line);
-    #else
-        res = realloc_function(ptr, size);
-    #endif
-    }
-    else {
-    #ifndef WOLFSSL_NO_MALLOC
-        res = realloc(ptr, size);
-    #else
-        WOLFSSL_MSG("No realloc available");
-    #endif
-    }
-
-    return res;
-}
-#endif /* WOLFSSL_STATIC_MEMORY */
-
-#ifdef WOLFSSL_STATIC_MEMORY
-
-struct wc_Memory {
-    byte*  buffer;
-    struct wc_Memory* next;
-    word32 sz;
-};
-
-
-/* returns amount of memory used on success. On error returns negative value
-   wc_Memory** list is the list that new buckets are prepended to
- */
-static int create_memory_buckets(byte* buffer, word32 bufSz,
-                              word32 buckSz, word32 buckNum, wc_Memory** list) {
-    word32 i;
-    byte*  pt  = buffer;
-    int    ret = 0;
-    word32 memSz = (word32)sizeof(wc_Memory);
-    word32 padSz = -(int)memSz & (WOLFSSL_STATIC_ALIGN - 1);
-
-    /* if not enough space available for bucket size then do not try */
-    if (buckSz + memSz + padSz > bufSz) {
-        return ret;
-    }
-
-    for (i = 0; i < buckNum; i++) {
-        if ((buckSz + memSz + padSz) <= (bufSz - ret)) {
-            /* create a new struct and set its values */
-            wc_Memory* mem = (struct wc_Memory*)(pt);
-            mem->sz = buckSz;
-            mem->buffer = (byte*)pt + padSz + memSz;
-            mem->next = NULL;
-
-            /* add the newly created struct to front of list */
-            if (*list == NULL) {
-                *list = mem;
-            } else {
-                mem->next = *list;
-                *list = mem;
-            }
-
-            /* advance pointer and keep track of memory used */
-            ret += buckSz + padSz + memSz;
-            pt  += buckSz + padSz + memSz;
-        }
-        else {
-            break; /* not enough space left for more buckets of this size */
-        }
-    }
-
-    return ret;
-}
-
-int wolfSSL_init_memory_heap(WOLFSSL_HEAP* heap)
-{
-    word32 wc_MemSz[WOLFMEM_DEF_BUCKETS] = { WOLFMEM_BUCKETS };
-    word32 wc_Dist[WOLFMEM_DEF_BUCKETS]  = { WOLFMEM_DIST };
-
-    if (heap == NULL) {
-        return BAD_FUNC_ARG;
-    }
-
-    XMEMSET(heap, 0, sizeof(WOLFSSL_HEAP));
-
-    XMEMCPY(heap->sizeList, wc_MemSz, sizeof(wc_MemSz));
-    XMEMCPY(heap->distList, wc_Dist,  sizeof(wc_Dist));
-
-    if (wc_InitMutex(&(heap->memory_mutex)) != 0) {
-        WOLFSSL_MSG("Error creating heap memory mutex");
-        return BAD_MUTEX_E;
-    }
-
-    return 0;
-}
-
-int wc_LoadStaticMemory(WOLFSSL_HEAP_HINT** pHint,
-    unsigned char* buf, unsigned int sz, int flag, int max)
-{
-    int ret;
-    WOLFSSL_HEAP*      heap;
-    WOLFSSL_HEAP_HINT* hint;
-    word32 idx = 0;
-
-    if (pHint == NULL || buf == NULL) {
-        return BAD_FUNC_ARG;
-    }
-
-    if ((sizeof(WOLFSSL_HEAP) + sizeof(WOLFSSL_HEAP_HINT)) > sz - idx) {
-        return BUFFER_E; /* not enough memory for structures */
-    }
-
-    /* check if hint has already been assigned */
-    if (*pHint == NULL) {
-        heap = (WOLFSSL_HEAP*)buf;
-        idx += sizeof(WOLFSSL_HEAP);
-        hint = (WOLFSSL_HEAP_HINT*)(buf + idx);
-        idx += sizeof(WOLFSSL_HEAP_HINT);
-
-        ret = wolfSSL_init_memory_heap(heap);
-        if (ret != 0) {
-            return ret;
-        }
-
-        XMEMSET(hint, 0, sizeof(WOLFSSL_HEAP_HINT));
-        hint->memory = heap;
-    }
-    else {
-    #ifdef WOLFSSL_HEAP_TEST
-        /* do not load in memory if test has been set */
-        if (heap == (void*)WOLFSSL_HEAP_TEST) {
-            return 0;
-        }
-    #endif
-
-        hint = (WOLFSSL_HEAP_HINT*)(*pHint);
-        heap = hint->memory;
-    }
-
-    ret = wolfSSL_load_static_memory(buf + idx, sz - idx, flag, heap);
-    if (ret != 1) {
-        WOLFSSL_MSG("Error partitioning memory");
-        return -1;
-    }
-
-    /* determine what max applies too */
-    if ((flag & WOLFMEM_IO_POOL) || (flag & WOLFMEM_IO_POOL_FIXED)) {
-        heap->maxIO = max;
-    }
-    else { /* general memory used in handshakes */
-        heap->maxHa = max;
-    }
-
-    heap->flag |= flag;
-    *pHint = hint;
-
-    (void)max;
-
-    return 0;
-}
-
-int wolfSSL_load_static_memory(byte* buffer, word32 sz, int flag,
-                                                             WOLFSSL_HEAP* heap)
-{
-    word32 ava = sz;
-    byte*  pt  = buffer;
-    int    ret = 0;
-    word32 memSz = (word32)sizeof(wc_Memory);
-    word32 padSz = -(int)memSz & (WOLFSSL_STATIC_ALIGN - 1);
-
-    WOLFSSL_ENTER("wolfSSL_load_static_memory");
-
-    if (buffer == NULL) {
-        return BAD_FUNC_ARG;
-    }
-
-    /* align pt */
-    while ((wolfssl_word)pt % WOLFSSL_STATIC_ALIGN && pt < (buffer + sz)) {
-        *pt = 0x00;
-        pt++;
-        ava--;
-    }
-
-#ifdef WOLFSSL_DEBUG_MEMORY
-    printf("Allocated %d bytes for static memory @ %p\n", ava, pt);
-#endif
-
-    /* devide into chunks of memory and add them to available list */
-    while (ava >= (heap->sizeList[0] + padSz + memSz)) {
-        int i;
-        /* creating only IO buffers from memory passed in, max TLS is 16k */
-        if (flag & WOLFMEM_IO_POOL || flag & WOLFMEM_IO_POOL_FIXED) {
-            if ((ret = create_memory_buckets(pt, ava,
-                                          WOLFMEM_IO_SZ, 1, &(heap->io))) < 0) {
-                WOLFSSL_LEAVE("wolfSSL_load_static_memory", ret);
-                return ret;
-            }
-
-            /* check if no more room left for creating IO buffers */
-            if (ret == 0) {
-                break;
-            }
-
-            /* advance pointer in buffer for next buckets and keep track
-               of how much memory is left available */
-            pt  += ret;
-            ava -= ret;
-        }
-        else {
-            /* start at largest and move to smaller buckets */
-            for (i = (WOLFMEM_MAX_BUCKETS - 1); i >= 0; i--) {
-                if ((heap->sizeList[i] + padSz + memSz) <= ava) {
-                    if ((ret = create_memory_buckets(pt, ava, heap->sizeList[i],
-                                     heap->distList[i], &(heap->ava[i]))) < 0) {
-                        WOLFSSL_LEAVE("wolfSSL_load_static_memory", ret);
-                        return ret;
-                    }
-
-                    /* advance pointer in buffer for next buckets and keep track
-                       of how much memory is left available */
-                    pt  += ret;
-                    ava -= ret;
-                }
-            }
-        }
-    }
-
-    return 1;
-}
-
-
-/* returns the size of management memory needed for each bucket.
- * This is memory that is used to keep track of and align memory buckets. */
-int wolfSSL_MemoryPaddingSz(void)
-{
-    word32 memSz = (word32)sizeof(wc_Memory);
-    word32 padSz = -(int)memSz & (WOLFSSL_STATIC_ALIGN - 1);
-    return memSz + padSz;
-}
-
-
-/* Used to calculate memory size for optimum use with buckets.
-   returns the suggested size rounded down to the nearest bucket. */
-int wolfSSL_StaticBufferSz(byte* buffer, word32 sz, int flag)
-{
-    word32 bucketSz[WOLFMEM_MAX_BUCKETS] = {WOLFMEM_BUCKETS};
-    word32 distList[WOLFMEM_MAX_BUCKETS] = {WOLFMEM_DIST};
-
-    word32 ava = sz;
-    byte*  pt  = buffer;
-    word32 memSz = (word32)sizeof(wc_Memory);
-    word32 padSz = -(int)memSz & (WOLFSSL_STATIC_ALIGN - 1);
-
-    WOLFSSL_ENTER("wolfSSL_static_size");
-
-    if (buffer == NULL) {
-        return BAD_FUNC_ARG;
-    }
-
-    /* align pt */
-    while ((wolfssl_word)pt % WOLFSSL_STATIC_ALIGN && pt < (buffer + sz)) {
-        pt++;
-        ava--;
-    }
-
-    /* creating only IO buffers from memory passed in, max TLS is 16k */
-    if (flag & WOLFMEM_IO_POOL || flag & WOLFMEM_IO_POOL_FIXED) {
-        if (ava < (memSz + padSz + WOLFMEM_IO_SZ)) {
-            return 0; /* not enough room for even one bucket */
-        }
-
-        ava = ava % (memSz + padSz + WOLFMEM_IO_SZ);
-    }
-    else {
-        int i, k;
-
-        if (ava < (bucketSz[0] + padSz + memSz)) {
-            return 0; /* not enough room for even one bucket */
-        }
-
-        while ((ava >= (bucketSz[0] + padSz + memSz)) && (ava > 0)) {
-            /* start at largest and move to smaller buckets */
-            for (i = (WOLFMEM_MAX_BUCKETS - 1); i >= 0; i--) {
-                for (k = distList[i]; k > 0; k--) {
-                    if ((bucketSz[i] + padSz + memSz) <= ava) {
-                        ava -= bucketSz[i] + padSz + memSz;
-                    }
-                }
-            }
-        }
-    }
-
-    return sz - ava; /* round down */
-}
-
-
-int FreeFixedIO(WOLFSSL_HEAP* heap, wc_Memory** io)
-{
-    WOLFSSL_MSG("Freeing fixed IO buffer");
-
-    /* check if fixed buffer was set */
-    if (*io == NULL) {
-        return 1;
-    }
-
-    if (heap == NULL) {
-        WOLFSSL_MSG("No heap to return fixed IO too");
-    }
-    else {
-        /* put IO buffer back into IO pool */
-        (*io)->next = heap->io;
-        heap->io    = *io;
-        *io         = NULL;
-    }
-
-    return 1;
-}
-
-
-int SetFixedIO(WOLFSSL_HEAP* heap, wc_Memory** io)
-{
-    WOLFSSL_MSG("Setting fixed IO for SSL");
-    if (heap == NULL) {
-        return MEMORY_E;
-    }
-
-    *io = heap->io;
-
-    if (*io != NULL) {
-        heap->io = (*io)->next;
-        (*io)->next = NULL;
-    }
-    else { /* failed to grab an IO buffer */
-        return 0;
-    }
-
-    return 1;
-}
-
-
-int wolfSSL_GetMemStats(WOLFSSL_HEAP* heap, WOLFSSL_MEM_STATS* stats)
-{
-        word32     i;
-        wc_Memory* pt;
-
-        XMEMSET(stats, 0, sizeof(WOLFSSL_MEM_STATS));
-
-        stats->totalAlloc = heap->alloc;
-        stats->totalFr    = heap->frAlc;
-        stats->curAlloc   = stats->totalAlloc - stats->totalFr;
-        stats->maxHa      = heap->maxHa;
-        stats->maxIO      = heap->maxIO;
-        for (i = 0; i < WOLFMEM_MAX_BUCKETS; i++) {
-            stats->blockSz[i] = heap->sizeList[i];
-            for (pt = heap->ava[i]; pt != NULL; pt = pt->next) {
-                stats->avaBlock[i] += 1;
-            }
-        }
-
-        for (pt = heap->io; pt != NULL; pt = pt->next) {
-            stats->avaIO++;
-        }
-
-        stats->flag       = heap->flag; /* flag used */
-
-    return 1;
-}
-
-
-#ifdef WOLFSSL_DEBUG_MEMORY
-void* wolfSSL_Malloc(size_t size, void* heap, int type, const char* func, unsigned int line)
-#else
-void* wolfSSL_Malloc(size_t size, void* heap, int type)
-#endif
-{
-    void* res = 0;
-    wc_Memory* pt = NULL;
-    int   i;
-
-    /* check for testing heap hint was set */
-#ifdef WOLFSSL_HEAP_TEST
-    if (heap == (void*)WOLFSSL_HEAP_TEST) {
-        return malloc(size);
-    }
-#endif
-
-    /* if no heap hint then use dynamic memory*/
-    if (heap == NULL) {
-        #ifdef WOLFSSL_HEAP_TEST
-            /* allow using malloc for creating ctx and method */
-            if (type == DYNAMIC_TYPE_CTX || type == DYNAMIC_TYPE_METHOD ||
-                                            type == DYNAMIC_TYPE_CERT_MANAGER) {
-                WOLFSSL_MSG("ERROR allowing null heap hint for ctx/method\n");
-                res = malloc(size);
-            }
-            else {
-                WOLFSSL_MSG("ERROR null heap hint passed into XMALLOC\n");
-                res = NULL;
-            }
-        #else
-        #ifndef WOLFSSL_NO_MALLOC
-            #ifdef FREERTOS
-                res = pvPortMalloc(size);
-            #else
-                res = malloc(size);
-            #endif
-        #else
-            WOLFSSL_MSG("No heap hint found to use and no malloc");
-            #ifdef WOLFSSL_DEBUG_MEMORY
-            printf("ERROR: at %s:%d\n", func, line);
-            #endif
-        #endif /* WOLFSSL_NO_MALLOC */
-        #endif /* WOLFSSL_HEAP_TEST */
-    }
-    else {
-        WOLFSSL_HEAP_HINT* hint = (WOLFSSL_HEAP_HINT*)heap;
-        WOLFSSL_HEAP*      mem  = hint->memory;
-
-        if (wc_LockMutex(&(mem->memory_mutex)) != 0) {
-            WOLFSSL_MSG("Bad memory_mutex lock");
-            return NULL;
-        }
-
-        /* case of using fixed IO buffers */
-        if (mem->flag & WOLFMEM_IO_POOL_FIXED &&
-                                             (type == DYNAMIC_TYPE_OUT_BUFFER ||
-                                              type == DYNAMIC_TYPE_IN_BUFFER)) {
-            if (type == DYNAMIC_TYPE_OUT_BUFFER) {
-                pt = hint->outBuf;
-            }
-            if (type == DYNAMIC_TYPE_IN_BUFFER) {
-                pt = hint->inBuf;
-            }
-        }
-        else {
-            /* check if using IO pool flag */
-            if (mem->flag & WOLFMEM_IO_POOL &&
-                                             (type == DYNAMIC_TYPE_OUT_BUFFER ||
-                                              type == DYNAMIC_TYPE_IN_BUFFER)) {
-                if (mem->io != NULL) {
-                    pt      = mem->io;
-                    mem->io = pt->next;
-                }
-            }
-
-            /* general static memory */
-            if (pt == NULL) {
-                for (i = 0; i < WOLFMEM_MAX_BUCKETS; i++) {
-                    if ((word32)size < mem->sizeList[i]) {
-                        if (mem->ava[i] != NULL) {
-                            pt = mem->ava[i];
-                            mem->ava[i] = pt->next;
-                            break;
-                        }
-                    }
-                }
-            }
-        }
-
-        if (pt != NULL) {
-            mem->inUse += pt->sz;
-            mem->alloc += 1;
-            res = pt->buffer;
-
-        #ifdef WOLFSSL_DEBUG_MEMORY
-            printf("Alloc: %p -> %u at %s:%d\n", pt->buffer, pt->sz, func, line);
-        #endif
-
-            /* keep track of connection statistics if flag is set */
-            if (mem->flag & WOLFMEM_TRACK_STATS) {
-                WOLFSSL_MEM_CONN_STATS* stats = hint->stats;
-                if (stats != NULL) {
-                    stats->curMem += pt->sz;
-                    if (stats->peakMem < stats->curMem) {
-                        stats->peakMem = stats->curMem;
-                    }
-                    stats->curAlloc++;
-                    if (stats->peakAlloc < stats->curAlloc) {
-                        stats->peakAlloc = stats->curAlloc;
-                    }
-                    stats->totalAlloc++;
-                }
-            }
-        }
-        else {
-            WOLFSSL_MSG("ERROR ran out of static memory");
-            #ifdef WOLFSSL_DEBUG_MEMORY
-            printf("Looking for %lu bytes at %s:%d\n", size, func, line);
-            #endif
-        }
-
-        wc_UnLockMutex(&(mem->memory_mutex));
-    }
-
-    #ifdef WOLFSSL_MALLOC_CHECK
-        if ((wolfssl_word)res % WOLFSSL_STATIC_ALIGN) {
-            WOLFSSL_MSG("ERROR memory is not alligned");
-            res = NULL;
-        }
-    #endif
-
-
-    (void)i;
-    (void)pt;
-    (void)type;
-
-    return res;
-}
-
-
-#ifdef WOLFSSL_DEBUG_MEMORY
-void wolfSSL_Free(void *ptr, void* heap, int type, const char* func, unsigned int line)
-#else
-void wolfSSL_Free(void *ptr, void* heap, int type)
-#endif
-{
-    int i;
-    wc_Memory* pt;
-
-    if (ptr) {
-        /* check for testing heap hint was set */
-    #ifdef WOLFSSL_HEAP_TEST
-        if (heap == (void*)WOLFSSL_HEAP_TEST) {
-            return free(ptr);
-        }
-    #endif
-
-        if (heap == NULL) {
-        #ifdef WOLFSSL_HEAP_TEST
-            /* allow using malloc for creating ctx and method */
-            if (type == DYNAMIC_TYPE_CTX || type == DYNAMIC_TYPE_METHOD ||
-                                            type == DYNAMIC_TYPE_CERT_MANAGER) {
-                WOLFSSL_MSG("ERROR allowing null heap hint for ctx/method\n");
-            }
-            else {
-                WOLFSSL_MSG("ERROR null heap hint passed into XFREE\n");
-            }
-        #endif
-        #ifndef WOLFSSL_NO_MALLOC
-            #ifdef FREERTOS
-                vPortFree(ptr);
-            #else
-                free(ptr);
-            #endif
-        #else
-            WOLFSSL_MSG("Error trying to call free when turned off");
-        #endif /* WOLFSSL_NO_MALLOC */
-        }
-        else {
-            WOLFSSL_HEAP_HINT* hint = (WOLFSSL_HEAP_HINT*)heap;
-            WOLFSSL_HEAP*      mem  = hint->memory;
-            word32 padSz = -(int)sizeof(wc_Memory) & (WOLFSSL_STATIC_ALIGN - 1);
-
-            /* get memory struct and add it to available list */
-            pt = (wc_Memory*)((byte*)ptr - sizeof(wc_Memory) - padSz);
-            if (wc_LockMutex(&(mem->memory_mutex)) != 0) {
-                WOLFSSL_MSG("Bad memory_mutex lock");
-                return;
-            }
-
-            /* case of using fixed IO buffers */
-            if (mem->flag & WOLFMEM_IO_POOL_FIXED &&
-                                             (type == DYNAMIC_TYPE_OUT_BUFFER ||
-                                              type == DYNAMIC_TYPE_IN_BUFFER)) {
-                /* fixed IO pools are free'd at the end of SSL lifetime
-                   using FreeFixedIO(WOLFSSL_HEAP* heap, wc_Memory** io) */
-            }
-            else if (mem->flag & WOLFMEM_IO_POOL && pt->sz == WOLFMEM_IO_SZ &&
-                                             (type == DYNAMIC_TYPE_OUT_BUFFER ||
-                                              type == DYNAMIC_TYPE_IN_BUFFER)) {
-                pt->next = mem->io;
-                mem->io  = pt;
-            }
-            else { /* general memory free */
-                for (i = 0; i < WOLFMEM_MAX_BUCKETS; i++) {
-                    if (pt->sz == mem->sizeList[i]) {
-                        pt->next = mem->ava[i];
-                        mem->ava[i] = pt;
-                        break;
-                    }
-                }
-            }
-            mem->inUse -= pt->sz;
-            mem->frAlc += 1;
-
-        #ifdef WOLFSSL_DEBUG_MEMORY
-            printf("Free: %p -> %u at %s:%d\n", pt->buffer, pt->sz, func, line);
-        #endif
-
-            /* keep track of connection statistics if flag is set */
-            if (mem->flag & WOLFMEM_TRACK_STATS) {
-                WOLFSSL_MEM_CONN_STATS* stats = hint->stats;
-                if (stats != NULL) {
-                    /* avoid under flow */
-                    if (stats->curMem > pt->sz) {
-                        stats->curMem -= pt->sz;
-                    }
-                    else {
-                        stats->curMem = 0;
-                    }
-
-                    if (stats->curAlloc > 0) {
-                        stats->curAlloc--;
-                    }
-                    stats->totalFr++;
-                }
-            }
-            wc_UnLockMutex(&(mem->memory_mutex));
-        }
-    }
-
-    (void)i;
-    (void)pt;
-    (void)type;
-}
-
-#ifdef WOLFSSL_DEBUG_MEMORY
-void* wolfSSL_Realloc(void *ptr, size_t size, void* heap, int type, const char* func, unsigned int line)
-#else
-void* wolfSSL_Realloc(void *ptr, size_t size, void* heap, int type)
-#endif
-{
-    void* res = 0;
-    wc_Memory* pt = NULL;
-    word32 prvSz;
-    int    i;
-
-    /* check for testing heap hint was set */
-#ifdef WOLFSSL_HEAP_TEST
-    if (heap == (void*)WOLFSSL_HEAP_TEST) {
-        return realloc(ptr, size);
-    }
-#endif
-
-    if (heap == NULL) {
-        #ifdef WOLFSSL_HEAP_TEST
-            WOLFSSL_MSG("ERROR null heap hint passed in to XREALLOC\n");
-        #endif
-        #ifndef WOLFSSL_NO_MALLOC
-            res = realloc(ptr, size);
-        #else
-            WOLFSSL_MSG("NO heap found to use for realloc");
-        #endif /* WOLFSSL_NO_MALLOC */
-    }
-    else {
-        WOLFSSL_HEAP_HINT* hint = (WOLFSSL_HEAP_HINT*)heap;
-        WOLFSSL_HEAP*      mem  = hint->memory;
-        word32 padSz = -(int)sizeof(wc_Memory) & (WOLFSSL_STATIC_ALIGN - 1);
-
-        if (wc_LockMutex(&(mem->memory_mutex)) != 0) {
-            WOLFSSL_MSG("Bad memory_mutex lock");
-            return NULL;
-        }
-
-        /* case of using fixed IO buffers or IO pool */
-        if (((mem->flag & WOLFMEM_IO_POOL)||(mem->flag & WOLFMEM_IO_POOL_FIXED))
-                                          && (type == DYNAMIC_TYPE_OUT_BUFFER ||
-                                              type == DYNAMIC_TYPE_IN_BUFFER)) {
-            /* no realloc, is fixed size */
-            pt = (wc_Memory*)((byte*)ptr - padSz - sizeof(wc_Memory));
-            if (pt->sz < size) {
-                WOLFSSL_MSG("Error IO memory was not large enough");
-                res = NULL; /* return NULL in error case */
-            }
-            res = pt->buffer;
-        }
-        else {
-        /* general memory */
-            for (i = 0; i < WOLFMEM_MAX_BUCKETS; i++) {
-                if ((word32)size < mem->sizeList[i]) {
-                    if (mem->ava[i] != NULL) {
-                        pt = mem->ava[i];
-                        mem->ava[i] = pt->next;
-                        break;
-                    }
-                }
-            }
-
-            if (pt != NULL && res == NULL) {
-                res = pt->buffer;
-
-                /* copy over original information and free ptr */
-                prvSz = ((wc_Memory*)((byte*)ptr - padSz -
-                                               sizeof(wc_Memory)))->sz;
-                prvSz = (prvSz > pt->sz)? pt->sz: prvSz;
-                XMEMCPY(pt->buffer, ptr, prvSz);
-                mem->inUse += pt->sz;
-                mem->alloc += 1;
-
-                /* free memory that was previously being used */
-                wc_UnLockMutex(&(mem->memory_mutex));
-                wolfSSL_Free(ptr, heap, type
-            #ifdef WOLFSSL_DEBUG_MEMORY
-                    , func, line
-            #endif
-                );
-                if (wc_LockMutex(&(mem->memory_mutex)) != 0) {
-                    WOLFSSL_MSG("Bad memory_mutex lock");
-                    return NULL;
-                }
-            }
-        }
-        wc_UnLockMutex(&(mem->memory_mutex));
-    }
-
-    #ifdef WOLFSSL_MALLOC_CHECK
-        if ((wolfssl_word)res % WOLFSSL_STATIC_ALIGN) {
-            WOLFSSL_MSG("ERROR memory is not alligned");
-            res = NULL;
-        }
-    #endif
-
-    (void)i;
-    (void)pt;
-    (void)type;
-
-    return res;
-}
-#endif /* WOLFSSL_STATIC_MEMORY */
-
-#endif /* USE_WOLFSSL_MEMORY */
-
-
-#ifdef HAVE_IO_POOL
-
-/* Example for user io pool, shared build may need definitions in lib proper */
-
-#include <wolfssl/wolfcrypt/types.h>
-#include <stdlib.h>
-
-#ifndef HAVE_THREAD_LS
-    #error "Oops, simple I/O pool example needs thread local storage"
-#endif
-
-
-/* allow simple per thread in and out pools */
-/* use 17k size since max record size is 16k plus overhead */
-static THREAD_LS_T byte pool_in[17*1024];
-static THREAD_LS_T byte pool_out[17*1024];
-
-
-void* XMALLOC(size_t n, void* heap, int type)
-{
-    (void)heap;
-
-    if (type == DYNAMIC_TYPE_IN_BUFFER) {
-        if (n < sizeof(pool_in))
-            return pool_in;
-        else
-            return NULL;
-    }
-
-    if (type == DYNAMIC_TYPE_OUT_BUFFER) {
-        if (n < sizeof(pool_out))
-            return pool_out;
-        else
-            return NULL;
-    }
-
-    return malloc(n);
-}
-
-void* XREALLOC(void *p, size_t n, void* heap, int type)
-{
-    (void)heap;
-
-    if (type == DYNAMIC_TYPE_IN_BUFFER) {
-        if (n < sizeof(pool_in))
-            return pool_in;
-        else
-            return NULL;
-    }
-
-    if (type == DYNAMIC_TYPE_OUT_BUFFER) {
-        if (n < sizeof(pool_out))
-            return pool_out;
-        else
-            return NULL;
-    }
-
-    return realloc(p, n);
-}
-
-void XFREE(void *p, void* heap, int type)
-{
-    (void)heap;
-
-    if (type == DYNAMIC_TYPE_IN_BUFFER)
-        return;  /* do nothing, static pool */
-
-    if (type == DYNAMIC_TYPE_OUT_BUFFER)
-        return;  /* do nothing, static pool */
-
-    free(p);
-}
-
-#endif /* HAVE_IO_POOL */
-
-