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

75 lines
2.0 KiB
C

#include "capwap.h"
#include "element.h"
/********************************************************************
0
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
| Transport |
+-+-+-+-+-+-+-+-+
Type: 51 for CAPWAP Transport Protocol
Length: 1
********************************************************************/
/* */
static void capwap_transport_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
struct capwap_transport_element* element = (struct capwap_transport_element*)data;
ASSERT(data != NULL);
ASSERT((element->type == CAPWAP_UDPLITE_TRANSPORT) || (element->type == CAPWAP_UDP_TRANSPORT));
/* */
func->write_u8(handle, element->type);
}
/* */
static void* capwap_transport_element_clone(void* data) {
ASSERT(data != NULL);
return capwap_clone(data, sizeof(struct capwap_transport_element));
}
/* */
static void capwap_transport_element_free(void* data) {
ASSERT(data != NULL);
capwap_free(data);
}
/* */
static void* capwap_transport_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
struct capwap_transport_element* data;
ASSERT(handle != NULL);
ASSERT(func != NULL);
if (func->read_ready(handle) != 1) {
log_printf(LOG_DEBUG, "Invalid Transport Protocol element: underbuffer");
return NULL;
}
/* Retrieve data */
data = (struct capwap_transport_element*)capwap_alloc(sizeof(struct capwap_transport_element));
func->read_u8(handle, &data->type);
if ((data->type != CAPWAP_UDPLITE_TRANSPORT) && (data->type != CAPWAP_UDP_TRANSPORT)) {
capwap_transport_element_free((void*)data);
log_printf(LOG_DEBUG, "Invalid Transport Protocol element: invalid type");
return NULL;
}
return data;
}
/* */
const struct capwap_message_elements_ops capwap_element_transport_ops = {
.category = CAPWAP_MESSAGE_ELEMENT_SINGLE,
.create = capwap_transport_element_create,
.parse = capwap_transport_element_parsing,
.clone = capwap_transport_element_clone,
.free = capwap_transport_element_free
};