freewtp/src/common/capwap_element_ecnsupport.c
2013-10-01 16:39:27 +02:00

75 lines
2.0 KiB
C

#include "capwap.h"
#include "capwap_element.h"
/********************************************************************
0
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
| ECN Support |
+-+-+-+-+-+-+-+-+
Type: 53 for ECN Support
Length: 1
********************************************************************/
/* */
static void capwap_ecnsupport_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
struct capwap_ecnsupport_element* element = (struct capwap_ecnsupport_element*)data;
ASSERT(data != NULL);
ASSERT((element->flag == CAPWAP_LIMITED_ECN_SUPPORT) || (element->flag == CAPWAP_FULL_ECN_SUPPORT));
/* */
func->write_u8(handle, element->flag);
}
/* */
static void* capwap_ecnsupport_element_clone(void* data) {
ASSERT(data != NULL);
return capwap_clone(data, sizeof(struct capwap_ecnsupport_element));
}
/* */
static void capwap_ecnsupport_element_free(void* data) {
ASSERT(data != NULL);
capwap_free(data);
}
/* */
static void* capwap_ecnsupport_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
struct capwap_ecnsupport_element* data;
ASSERT(handle != NULL);
ASSERT(func != NULL);
if (func->read_ready(handle) != 1) {
capwap_logging_debug("Invalid ECN Support element: underbuffer");
return NULL;
}
/* Retrieve data */
data = (struct capwap_ecnsupport_element*)capwap_alloc(sizeof(struct capwap_ecnsupport_element));
func->read_u8(handle, &data->flag);
if ((data->flag != CAPWAP_LIMITED_ECN_SUPPORT) && (data->flag != CAPWAP_FULL_ECN_SUPPORT)) {
capwap_ecnsupport_element_free((void*)data);
capwap_logging_debug("Invalid ECN Support element: invalid flag");
return NULL;
}
return data;
}
/* */
struct capwap_message_elements_ops capwap_element_ecnsupport_ops = {
.create_message_element = capwap_ecnsupport_element_create,
.parsing_message_element = capwap_ecnsupport_element_parsing,
.clone_message_element = capwap_ecnsupport_element_clone,
.free_message_element = capwap_ecnsupport_element_free
};