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/******************************************************************************
** COPYRIGHT NOTICE
** (c) 2012 The Johns Hopkins University Applied Physics Laboratory
** All rights reserved.
**
** This material may only be used, modified, or reproduced by or for the
** U.S. Government pursuant to the license rights granted under
** FAR clause 52.227-14 or DFARS clauses 252.227-7013/7014
**
** For any other permissions, please contact the Legal Office at JHU/APL.
******************************************************************************/
/*****************************************************************************
**
** \file msg_def.c
**
** Description:
**
** Notes:
**
** Assumptions:
**
**
** Modification History:
** MM/DD/YY AUTHOR DESCRIPTION
** -------- ------------ ---------------------------------------------
** 11/02/12 E. Birrane Initial Implementation
*****************************************************************************/
#include "platform.h"
#include "ion.h"
#include "shared/primitives/def.h"
#include "shared/msg/msg_def.h"
/**
* \brief serializes a definition message into a buffer.
*
* \author Ed Birrane
*
* \note The returned message must be de-allocated from the memory pool.
*
* \return NULL - Failure
* !NULL - The serialized message.
*
* \param[in] msg The message to serialize.
* \param[out] len The length of the serialized message.
*/
uint8_t *def_serialize_gen(def_gen_t *def, uint32_t *len)
{
uint8_t *result = NULL;
uint8_t *cursor = NULL;
uint8_t *id = NULL;
uint32_t id_len = 0;
uint8_t *contents = NULL;
uint32_t contents_len = 0;
DTNMP_DEBUG_ENTRY("def_serialize_gen","(0x%x, 0x%x)",
(unsigned long)def, (unsigned long) len);
/* Step 0: Sanity Checks. */
if((def == NULL) || (len == NULL))
{
DTNMP_DEBUG_ERR("def_serialize_gen","Bad Args",NULL);
DTNMP_DEBUG_EXIT("def_serialize_gen","->NULL",NULL);
return NULL;
}
*len = 0;
/* STEP 1: Serialize the ID. */
if((id = mid_serialize(def->id, &id_len)) == NULL)
{
DTNMP_DEBUG_ERR("def_serialize_gen","Can't serialize hdr.",NULL);
DTNMP_DEBUG_EXIT("def_serialize_gen","->NULL",NULL);
return NULL;
}
/* STEP 2: Serialize the Contents. */
if((contents = midcol_serialize(def->contents, &contents_len)) == NULL)
{
DTNMP_DEBUG_ERR("def_serialize_gen","Can't serialize hdr.",NULL);
MRELEASE(id);
DTNMP_DEBUG_EXIT("def_serialize_gen","->NULL",NULL);
return NULL;
}
/* Step 5: Figure out the length. */
*len = id_len + contents_len;
/* STEP 6: Allocate the serialized message. */
if((result = (uint8_t*)MTAKE(*len)) == NULL)
{
DTNMP_DEBUG_ERR("def_serialize_gen","Can't alloc %d bytes", *len);
*len = 0;
MRELEASE(id);
MRELEASE(contents);
DTNMP_DEBUG_EXIT("def_serialize_gen","->NULL",NULL);
return NULL;
}
/* Step 7: Populate the serialized message. */
cursor = result;
memcpy(cursor, id, id_len);
cursor += id_len;
MRELEASE(id);
memcpy(cursor, contents, contents_len);
cursor += contents_len;
MRELEASE(contents);
/* Step 6: Last sanity check. */
if((cursor - result) != *len)
{
DTNMP_DEBUG_ERR("def_serialize_gen","Wrote %d bytes but allcated %d",
(unsigned long) (cursor - result), *len);
*len = 0;
MRELEASE(result);
DTNMP_DEBUG_EXIT("def_serialize_gen","->NULL",NULL);
return NULL;
}
DTNMP_DEBUG_EXIT("def_serialize_gen","->0x%x",(unsigned long)result);
return result;
}
/* Deserialize functions. */
/**
* \brief Creates a definition message from a buffer.
*
* \author Ed Birrane
*
* \note
* - On failure (NULL return) we do NOT de-allocate the passed-in header.
*
* \return NULL - failure
* !NULL - message.
*
* \param[in] cursor The buffer holding the message.
* \param[in] size The remaining buffer size.
* \param[out] bytes_used Bytes consumed in the deserialization.
*/
def_gen_t *def_deserialize_gen(uint8_t *cursor,
uint32_t size,
uint32_t *bytes_used)
{
def_gen_t *result = NULL;
uint32_t bytes = 0;
DTNMP_DEBUG_ENTRY("def_deserialize_gen","(0x%x, %d, 0x%x)",
(unsigned long)cursor,
size, (unsigned long) bytes_used);
/* Step 0: Sanity Checks. */
if((cursor == NULL) || (bytes_used == 0))
{
DTNMP_DEBUG_ERR("def_deserialize_gen","Bad Args.",NULL);
DTNMP_DEBUG_EXIT("def_deserialize_gen","->NULL",NULL);
return NULL;
}
/* Step 1: Allocate the new message structure. */
if((result = (def_gen_t*)MTAKE(sizeof(def_gen_t))) == NULL)
{
DTNMP_DEBUG_ERR("def_deserialize_gen","Can't Alloc %d Bytes.",
sizeof(def_gen_t));
*bytes_used = 0;
DTNMP_DEBUG_EXIT("def_deserialize_gen","->NULL",NULL);
return NULL;
}
else
{
memset(result,0,sizeof(def_gen_t));
}
/* Step 2: Deserialize the message. */
/* Grab the ID MID. */
if((result->id = mid_deserialize(cursor, size, &bytes)) == NULL)
{
DTNMP_DEBUG_ERR("def_deserialize_gen","Can't grab ID MID.",
sizeof(def_gen_t));
*bytes_used = 0;
def_release_gen(result);
DTNMP_DEBUG_EXIT("def_deserialize_gen","->NULL",NULL);
return NULL;
}
else
{
cursor += bytes;
size -= bytes;
*bytes_used += bytes;
}
/* Grab the list of contents. */
if((result->contents = midcol_deserialize(cursor, size, &bytes)) == NULL)
{
DTNMP_DEBUG_ERR("def_deserialize_gen","Can't grab contents.",NULL);
*bytes_used = 0;
def_release_gen(result);
DTNMP_DEBUG_EXIT("def_deserialize_gen","->NULL",NULL);
return NULL;
}
else
{
cursor += bytes;
size -= bytes;
*bytes_used += bytes;
}
DTNMP_DEBUG_EXIT("def_deserialize_gen","->0x%x",(unsigned long)result);
return result;
}
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