114 lines
3.9 KiB
C
114 lines
3.9 KiB
C
#include "capwap.h"
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#include "element.h"
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/********************************************************************
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0 1 2 3
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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
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Reason | Length | Message Element...
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Type: 34 for Returned Message Element
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Length: >= 6
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********************************************************************/
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/* */
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static void capwap_returnedmessage_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
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struct capwap_returnedmessage_element* element = (struct capwap_returnedmessage_element*)data;
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ASSERT(data != NULL);
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ASSERT(element->length >= 4);
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ASSERT((element->reason == CAPWAP_RETURNED_MESSAGE_UNKNOWN_MESSAGE_ELEMENT) || (element->reason == CAPWAP_RETURNED_MESSAGE_UNSUPPORTED_MESSAGE_ELEMENT) ||
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(element->reason == CAPWAP_RETURNED_MESSAGE_UNKNOWN_MESSAGE_ELEMENT_VALUE) || (element->reason == CAPWAP_RETURNED_MESSAGE_UNSUPPORTED_MESSAGE_ELEMENT_VALUE));
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func->write_u8(handle, element->reason);
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func->write_u8(handle, element->length);
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func->write_block(handle, element->message, element->length);
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}
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/* */
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static void* capwap_returnedmessage_element_clone(void* data) {
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struct capwap_returnedmessage_element* cloneelement;
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ASSERT(data != NULL);
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cloneelement = capwap_clone(data, sizeof(struct capwap_returnedmessage_element));
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if (cloneelement->length > 0) {
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cloneelement->message = capwap_clone(((struct capwap_returnedmessage_element*)data)->message, cloneelement->length);
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}
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return cloneelement;
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}
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/* */
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static void capwap_returnedmessage_element_free(void* data) {
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struct capwap_returnedmessage_element* element = (struct capwap_returnedmessage_element*)data;
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ASSERT(data != NULL);
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if (element->message) {
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capwap_free(element->message);
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}
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capwap_free(data);
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}
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/* */
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static void* capwap_returnedmessage_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
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unsigned short length;
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struct capwap_returnedmessage_element* data;
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ASSERT(handle != NULL);
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ASSERT(func != NULL);
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length = func->read_ready(handle);
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if (length < 6) {
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log_printf(LOG_DEBUG, "Invalid Returned Message element: underbuffer");
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return NULL;
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}
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length -= 2;
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if (length > CAPWAP_RETURNED_MESSAGE_MAX_LENGTH) {
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log_printf(LOG_DEBUG, "Invalid Returned Message element: overbuffer");
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return NULL;
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}
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/* */
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data = (struct capwap_returnedmessage_element*)capwap_alloc(sizeof(struct capwap_returnedmessage_element));
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memset(data, 0, sizeof(struct capwap_returnedmessage_element));
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/* Retrieve data */
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func->read_u8(handle, &data->reason);
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func->read_u8(handle, &data->length);
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if ((data->reason != CAPWAP_RETURNED_MESSAGE_UNKNOWN_MESSAGE_ELEMENT) &&
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(data->reason != CAPWAP_RETURNED_MESSAGE_UNSUPPORTED_MESSAGE_ELEMENT) &&
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(data->reason != CAPWAP_RETURNED_MESSAGE_UNKNOWN_MESSAGE_ELEMENT_VALUE) &&
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(data->reason != CAPWAP_RETURNED_MESSAGE_UNSUPPORTED_MESSAGE_ELEMENT_VALUE)) {
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capwap_returnedmessage_element_free((void*)data);
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log_printf(LOG_DEBUG, "Invalid Returned Message element: invalid reason");
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return NULL;
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} else if (data->length != length) {
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capwap_returnedmessage_element_free((void*)data);
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log_printf(LOG_DEBUG, "Invalid Returned Message element: invalid length");
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return NULL;
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}
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data->message = (uint8_t*)capwap_alloc(data->length);
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func->read_block(handle, data->message, data->length);
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return data;
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}
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/* */
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const struct capwap_message_elements_ops capwap_element_returnedmessage_ops = {
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.category = CAPWAP_MESSAGE_ELEMENT_ARRAY,
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.create = capwap_returnedmessage_element_create,
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.parse = capwap_returnedmessage_element_parsing,
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.clone = capwap_returnedmessage_element_clone,
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.free = capwap_returnedmessage_element_free
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};
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