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

136 lines
4.0 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Length | MAC Address ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| VLAN Name...
+-+-+-+-+-+-+-+-+
Type: 8 for Add Station
Length: >= 8
********************************************************************/
/* */
static void capwap_addstation_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
struct capwap_addstation_element* element = (struct capwap_addstation_element*)data;
ASSERT(data != NULL);
ASSERT(IS_VALID_RADIOID(element->radioid));
ASSERT(IS_VALID_MACADDRESS_LENGTH(element->length));
func->write_u8(handle, element->radioid);
func->write_u8(handle, element->length);
func->write_block(handle, element->address, element->length);
if (element->vlan && *element->vlan) {
unsigned short length = strlen((char*)element->vlan);
ASSERT(length <= CAPWAP_ADDSTATION_VLAN_MAX_LENGTH);
func->write_block(handle, element->vlan, length);
}
}
/* */
static void* capwap_addstation_element_clone(void* data) {
struct capwap_addstation_element* cloneelement;
ASSERT(data != NULL);
cloneelement = capwap_clone(data, sizeof(struct capwap_addstation_element));
if (cloneelement->length > 0) {
cloneelement->address = capwap_clone(((struct capwap_addstation_element*)data)->address, cloneelement->length);
}
if (cloneelement->vlan) {
cloneelement->vlan = (uint8_t*)capwap_duplicate_string((char*)((struct capwap_addstation_element*)data)->vlan);
}
return cloneelement;
}
/* */
static void capwap_addstation_element_free(void* data) {
struct capwap_addstation_element* element = (struct capwap_addstation_element*)data;
ASSERT(data != NULL);
if (element->vlan) {
capwap_free(element->vlan);
}
if (element->address) {
capwap_free(element->address);
}
capwap_free(element);
}
/* */
static void* capwap_addstation_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
unsigned short length;
struct capwap_addstation_element* data;
ASSERT(handle != NULL);
ASSERT(func != NULL);
length = func->read_ready(handle);
if (length < 8) {
log_printf(LOG_DEBUG, "Invalid Add Station element: underbuffer");
return NULL;
}
length -= 2;
/* */
data = (struct capwap_addstation_element*)capwap_alloc(sizeof(struct capwap_addstation_element));
memset(data, 0, sizeof(struct capwap_addstation_element));
/* Retrieve data */
func->read_u8(handle, &data->radioid);
func->read_u8(handle, &data->length);
if (!IS_VALID_RADIOID(data->radioid)) {
capwap_addstation_element_free((void*)data);
log_printf(LOG_DEBUG, "Invalid Add Station element: invalid radio");
return NULL;
} else if (!IS_VALID_MACADDRESS_LENGTH(data->length) || (length < data->length)) {
capwap_addstation_element_free((void*)data);
log_printf(LOG_DEBUG, "Invalid Add Station element: invalid length");
return NULL;
}
data->address = (uint8_t*)capwap_alloc(data->length);
func->read_block(handle, data->address, data->length);
length -= data->length;
if (length > 0) {
if (length <= CAPWAP_ADDSTATION_VLAN_MAX_LENGTH) {
data->vlan = (uint8_t*)capwap_alloc(length + 1);
func->read_block(handle, data->vlan, length);
data->vlan[length] = 0;
} else {
capwap_addstation_element_free((void*)data);
log_printf(LOG_DEBUG, "Invalid Add Station element: invalid vlan");
return NULL;
}
}
return data;
}
/* */
const struct capwap_message_elements_ops capwap_element_addstation_ops = {
.category = CAPWAP_MESSAGE_ELEMENT_SINGLE,
.create = capwap_addstation_element_create,
.parse = capwap_addstation_element_parsing,
.clone = capwap_addstation_element_clone,
.free = capwap_addstation_element_free
};