freewtp/lib/element_duplicateipv6.c
2016-08-23 08:55:15 +02:00

116 lines
4.1 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IP Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IP Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IP Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IP Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Status | Length | MAC Address ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 22 for Duplicate IPv6 Address
Length: >= 24
********************************************************************/
/* */
static void capwap_duplicateipv6_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
struct capwap_duplicateipv6_element* element = (struct capwap_duplicateipv6_element*)data;
ASSERT(data != NULL);
ASSERT((element->status == CAPWAP_DUPLICATEIPv6_CLEARED) || (element->status == CAPWAP_DUPLICATEIPv6_DETECTED));
ASSERT(IS_VALID_MACADDRESS_LENGTH(element->length));
func->write_block(handle, (uint8_t*)&element->address, sizeof(struct in6_addr));
func->write_u8(handle, element->status);
func->write_u8(handle, element->length);
func->write_block(handle, element->macaddress, element->length);
}
/* */
static void* capwap_duplicateipv6_element_clone(void* data) {
struct capwap_duplicateipv6_element* cloneelement;
ASSERT(data != NULL);
cloneelement = capwap_clone(data, sizeof(struct capwap_duplicateipv6_element));
if (cloneelement->length > 0) {
cloneelement->macaddress = capwap_clone(((struct capwap_duplicateipv6_element*)data)->macaddress, cloneelement->length);
}
return cloneelement;
}
/* */
static void capwap_duplicateipv6_element_free(void* data) {
struct capwap_duplicateipv6_element* element = (struct capwap_duplicateipv6_element*)data;
ASSERT(data != NULL);
if (element->macaddress) {
capwap_free(element->macaddress);
}
capwap_free(data);
}
/* */
static void* capwap_duplicateipv6_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
unsigned short length;
struct capwap_duplicateipv6_element* data;
ASSERT(handle != NULL);
ASSERT(func != NULL);
length = func->read_ready(handle);
if (length < 24) {
log_printf(LOG_DEBUG, "Invalid Duplicate IPv6 Address element: underbuffer");
return NULL;
}
length -= 18;
/* */
data = (struct capwap_duplicateipv6_element*)capwap_alloc(sizeof(struct capwap_duplicateipv6_element));
memset(data, 0, sizeof(struct capwap_duplicateipv6_element));
/* Retrieve data */
func->read_block(handle, (uint8_t*)&data->address, sizeof(struct in6_addr));
func->read_u8(handle, &data->status);
func->read_u8(handle, &data->length);
if ((data->status != CAPWAP_DUPLICATEIPv6_CLEARED) && (data->status != CAPWAP_DUPLICATEIPv6_DETECTED)) {
capwap_duplicateipv6_element_free((void*)data);
log_printf(LOG_DEBUG, "Invalid Duplicate IPv6 Address element: invalid status");
return NULL;
} else if (!IS_VALID_MACADDRESS_LENGTH(data->length) || (length != data->length)) {
capwap_duplicateipv6_element_free((void*)data);
log_printf(LOG_DEBUG, "Invalid Duplicate IPv6 Address element: invalid length");
return NULL;
}
data->macaddress = (uint8_t*)capwap_alloc(data->length);
func->read_block(handle, data->macaddress, data->length);
return data;
}
/* */
const struct capwap_message_elements_ops capwap_element_duplicateipv6_ops = {
.category = CAPWAP_MESSAGE_ELEMENT_SINGLE,
.create = capwap_duplicateipv6_element_create,
.parse = capwap_duplicateipv6_element_parsing,
.clone = capwap_duplicateipv6_element_clone,
.free = capwap_duplicateipv6_element_free
};