115 lines
4.0 KiB
C
115 lines
4.0 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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| Data Type | Data Mode | Data Length |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Data ....
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+-+-+-+-+-+-+-+-+
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Type: 13 for Data Transfer Data
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Length: >= 5
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********************************************************************/
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/* */
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static void capwap_datatransferdata_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
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struct capwap_datatransferdata_element* element = (struct capwap_datatransferdata_element*)data;
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ASSERT(data != NULL);
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ASSERT((element->type == CAPWAP_DATATRANSFERDATA_TYPE_DATA_IS_INCLUDED) || (element->type == CAPWAP_DATATRANSFERDATA_TYPE_DATA_EOF) || (element->type == CAPWAP_DATATRANSFERDATA_TYPE_ERROR));
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ASSERT((element->mode == CAPWAP_DATATRANSFERDATA_MODE_CRASH_DUMP) || (element->mode == CAPWAP_DATATRANSFERDATA_MODE_MEMORY_DUMP));
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ASSERT(element->length > 0);
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func->write_u8(handle, element->type);
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func->write_u8(handle, element->mode);
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func->write_u16(handle, element->length);
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func->write_block(handle, element->data, element->length);
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}
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/* */
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static void* capwap_datatransferdata_element_clone(void* data) {
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struct capwap_datatransferdata_element* cloneelement;
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ASSERT(data != NULL);
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cloneelement = capwap_clone(data, sizeof(struct capwap_datatransferdata_element));
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if (cloneelement->length > 0) {
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cloneelement->data = capwap_clone(((struct capwap_datatransferdata_element*)data)->data, 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_datatransferdata_element_free(void* data) {
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struct capwap_datatransferdata_element* element = (struct capwap_datatransferdata_element*)data;
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ASSERT(data != NULL);
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if (element->data) {
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capwap_free(element->data);
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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_datatransferdata_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_datatransferdata_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 < 5) {
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log_printf(LOG_DEBUG, "Invalid Data Transfer Data element: underbuffer");
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return NULL;
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}
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length -= 4;
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/* */
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data = (struct capwap_datatransferdata_element*)capwap_alloc(sizeof(struct capwap_datatransferdata_element));
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memset(data, 0, sizeof(struct capwap_datatransferdata_element));
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/* Retrieve data */
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func->read_u8(handle, &data->type);
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func->read_u8(handle, &data->mode);
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func->read_u16(handle, &data->length);
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if ((data->type != CAPWAP_DATATRANSFERDATA_TYPE_DATA_IS_INCLUDED) && (data->type != CAPWAP_DATATRANSFERDATA_TYPE_DATA_EOF) && (data->type != CAPWAP_DATATRANSFERDATA_TYPE_ERROR)) {
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capwap_datatransferdata_element_free((void*)data);
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log_printf(LOG_DEBUG, "Invalid Data Transfer Data element: invalid type");
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return NULL;
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} else if ((data->mode != CAPWAP_DATATRANSFERDATA_MODE_CRASH_DUMP) && (data->mode != CAPWAP_DATATRANSFERDATA_MODE_MEMORY_DUMP)) {
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capwap_datatransferdata_element_free((void*)data);
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log_printf(LOG_DEBUG, "Invalid Data Transfer Data element: invalid mode");
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return NULL;
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} else if (length != data->length) {
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capwap_datatransferdata_element_free((void*)data);
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log_printf(LOG_DEBUG, "Invalid Data Transfer Data element: invalid length");
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return NULL;
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}
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data->data = (uint8_t*)capwap_alloc(length);
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func->read_block(handle, data->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_datatransferdata_ops = {
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.category = CAPWAP_MESSAGE_ELEMENT_SINGLE,
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.create = capwap_datatransferdata_element_create,
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.parse = capwap_datatransferdata_element_parsing,
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.clone = capwap_datatransferdata_element_clone,
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.free = capwap_datatransferdata_element_free
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};
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