freewtp/lib/element_vendorpayload.c
2016-08-23 08:55:15 +02:00

112 lines
3.1 KiB
C

#include "capwap.h"
#include "element.h"
/*
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Vendor Identifier |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Element ID | Data...
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Type: 37 for Vendor Specific Payload
*
* Length: >= 7
*
*/
/* */
static void capwap_vendorpayload_element_create(void* data,
capwap_message_elements_handle handle,
struct capwap_write_message_elements_ops* func)
{
struct capwap_vendorpayload_element* element = (struct capwap_vendorpayload_element *)data;
ASSERT(data != NULL);
ASSERT(element->datalength > 0);
func->write_u32(handle, element->vendorid);
func->write_u16(handle, element->elementid);
func->write_block(handle, element->data, element->datalength);
}
/* */
static void* capwap_vendorpayload_element_clone(void *data)
{
struct capwap_vendorpayload_element* element = (struct capwap_vendorpayload_element *)data;
ASSERT(data != NULL);
return capwap_clone(data, sizeof(struct capwap_vendorpayload_element) + element->datalength);
}
/* */
static void capwap_vendorpayload_element_free(void *data)
{
ASSERT(data != NULL);
capwap_free(data);
}
/* */
void *
capwap_unknown_vendorpayload_element_parsing(capwap_message_elements_handle handle,
struct capwap_read_message_elements_ops *func,
unsigned short length,
const struct capwap_message_element_id vendor_id)
{
struct capwap_vendorpayload_element* data;
/* Retrieve data */
data = (struct capwap_vendorpayload_element *)capwap_alloc(sizeof(struct capwap_vendorpayload_element)
+ length);
data->vendorid = vendor_id.vendor;
data->elementid = vendor_id.type;
data->datalength = length;
func->read_block(handle, data->data, length);
return data;
}
/* */
static void *
capwap_vendorpayload_element_parsing(capwap_message_elements_handle handle,
struct capwap_read_message_elements_ops *func)
{
unsigned short length;
struct capwap_message_element_id vendor_id;
ASSERT(handle != NULL);
ASSERT(func != NULL);
length = func->read_ready(handle);
if (length < 7) {
log_printf(LOG_DEBUG, "Invalid Vendor Specific Payload element: underbuffer");
return NULL;
}
length -= 6;
if (length > CAPWAP_VENDORPAYLOAD_MAXLENGTH) {
log_printf(LOG_DEBUG, "Invalid Vendor Specific Payload element: overbuffer");
return NULL;
}
/* Retrieve data */
func->read_u32(handle, &vendor_id.vendor);
func->read_u16(handle, &vendor_id.type);
return capwap_unknown_vendorpayload_element_parsing(handle, func, length, vendor_id);
}
/* */
const struct capwap_message_elements_ops capwap_element_vendorpayload_ops = {
.category = CAPWAP_MESSAGE_ELEMENT_ARRAY,
.create = capwap_vendorpayload_element_create,
.parse = capwap_vendorpayload_element_parsing,
.clone = capwap_vendorpayload_element_clone,
.free = capwap_vendorpayload_element_free
};