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/**
* @file obex_hdr_ptr.c
*
* OBEX header releated functions.
* OpenOBEX library - Free implementation of the Object Exchange protocol.
*
* Copyright (c) 2012 Hendrik Sattler, All Rights Reserved.
*
* OpenOBEX is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* This program 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenOBEX. If not, see <http://www.gnu.org/>.
*/
#include "obex_hdr.h"
#include "debug.h"
#ifndef _WIN32
#include <arpa/inet.h>
#endif
#include <string.h>
struct obex_hdr_ptr {
enum obex_hdr_id id;
enum obex_hdr_type type;
size_t size;
const void *value;
};
static
void obex_hdr_ptr_destroy(void *self)
{
free(self);
}
static
enum obex_hdr_id obex_hdr_ptr_get_id(void *self)
{
struct obex_hdr_ptr *ptr = self;
return ptr->id;
}
static
enum obex_hdr_type obex_hdr_ptr_get_type(void *self)
{
struct obex_hdr_ptr *ptr = self;
return ptr->type;
}
static
size_t obex_hdr_ptr_get_data_size(void *self)
{
struct obex_hdr_ptr *ptr = self;
return ptr->size;
}
static
const void * obex_hdr_ptr_get_data_ptr(void *self)
{
struct obex_hdr_ptr *ptr = self;
return ptr->value;
}
static
bool obex_hdr_ptr_set_data(void *self, const void *data, size_t size)
{
struct obex_hdr_ptr *ptr = self;
ptr->value = data;
ptr->size = size;
return true;
}
static
struct obex_hdr_ops obex_hdr_ptr_ops = {
&obex_hdr_ptr_destroy,
&obex_hdr_ptr_get_id,
&obex_hdr_ptr_get_type,
&obex_hdr_ptr_get_data_size,
&obex_hdr_ptr_get_data_ptr,
&obex_hdr_ptr_set_data,
NULL,
NULL,
};
struct obex_hdr * obex_hdr_ptr_create(enum obex_hdr_id id,
enum obex_hdr_type type,
const void *data, size_t size)
{
struct obex_hdr_ptr *ptr = malloc(sizeof(*ptr));
if (!ptr)
return NULL;
ptr->id = id;
ptr->type = type;
ptr->size = size;
ptr->value = data;
return obex_hdr_new(&obex_hdr_ptr_ops, ptr);
}
struct obex_hdr * obex_hdr_ptr_parse(const void *msgdata, size_t size)
{
struct obex_hdr_ptr *ptr;
uint16_t hsize;
if (size < 1)
return NULL;
ptr = malloc(sizeof(*ptr));
if (!ptr)
return NULL;
ptr->id = ((uint8_t *)msgdata)[0] & OBEX_HDR_ID_MASK;
ptr->type = ((uint8_t *)msgdata)[0] & OBEX_HDR_TYPE_MASK;
switch (ptr->type) {
case OBEX_HDR_TYPE_UNICODE:
case OBEX_HDR_TYPE_BYTES:
if (size < 3)
goto err;
memcpy(&hsize, (uint8_t *)msgdata + 1, 2);
ptr->size = ntohs(hsize) - 3;
if (size < (3 + ptr->size))
goto err;
ptr->value = (uint8_t *)msgdata + 3;
break;
case OBEX_HDR_TYPE_UINT8:
if (size < 2)
goto err;
ptr->size = 1;
ptr->value = (uint8_t *)msgdata + 1;
break;
case OBEX_HDR_TYPE_UINT32:
if (size < 5)
goto err;
ptr->size = 4;
ptr->value = (uint8_t *)msgdata + 1;
break;
default:
goto err;
}
return obex_hdr_new(&obex_hdr_ptr_ops, ptr);
err:
DEBUG(1, "Header too big.\n");
free(ptr);
return NULL;
}
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