freewtp/lib/element_wtpmactype.c

#include "capwap.h"
#include "element.h"

/*
 *
 *   0
 *   0 1 2 3 4 5 6 7
 *  +-+-+-+-+-+-+-+-+
 *  |   MAC Type    |
 *  +-+-+-+-+-+-+-+-+
 *
 *  Type:   44 for WTP MAC Type
 *
 *  Length:  1
 *
 */

/* */
static void
capwap_wtpmactype_element_create(void *data, capwap_message_elements_handle handle,
				 struct capwap_write_message_elements_ops *func)
{
	struct capwap_wtpmactype_element *element =
		(struct capwap_wtpmactype_element*)data;

	ASSERT(data != NULL);
	ASSERT((element->type == CAPWAP_LOCALMAC) ||
	       (element->type == CAPWAP_SPLITMAC) ||
	       (element->type == CAPWAP_LOCALANDSPLITMAC));

	/* */
	func->write_u8(handle, element->type);
}

/* */
static void *capwap_wtpmactype_element_clone(void *data)
{
	ASSERT(data != NULL);

	return capwap_clone(data, sizeof(struct capwap_wtpmactype_element));
}

/* */
static void capwap_wtpmactype_element_free(void *data)
{
	ASSERT(data != NULL);

	capwap_free(data);
}

/* */
static void *
capwap_wtpmactype_element_parsing(capwap_message_elements_handle handle,
				  struct capwap_read_message_elements_ops *func)
{
	struct capwap_wtpmactype_element *data;

	ASSERT(handle != NULL);
	ASSERT(func != NULL);

	if (func->read_ready(handle) != 1) {
		log_printf(LOG_DEBUG, "Invalid WTP MAC Type element: underbuffer");
		return NULL;
	}

	/* Retrieve data */
	data = (struct capwap_wtpmactype_element *)
		capwap_alloc(sizeof(struct capwap_wtpmactype_element));

	func->read_u8(handle, &data->type);
	if ((data->type != CAPWAP_LOCALMAC) &&
	    (data->type != CAPWAP_SPLITMAC) &&
	    (data->type != CAPWAP_LOCALANDSPLITMAC))
	{
		capwap_wtpmactype_element_free((void*)data);
		log_printf(LOG_DEBUG, "Invalid WTP MAC Type element: invalid type");
		return NULL;
	}

	return data;
}

/* */
const struct capwap_message_elements_ops capwap_element_wtpmactype_ops = {
	.category = CAPWAP_MESSAGE_ELEMENT_SINGLE,
	.create = capwap_wtpmactype_element_create,
	.parse = capwap_wtpmactype_element_parsing,
	.clone = capwap_wtpmactype_element_clone,
	.free = capwap_wtpmactype_element_free
};