100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
#include "capwap.h"
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#include "capwap_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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| Vendor Identifier |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Element ID | Data...
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Type: 37 for Vendor Specific Payload
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Length: >= 7
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********************************************************************/
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struct capwap_vendorpayload_raw_element {
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unsigned long vendorid;
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unsigned short elementid;
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char data[0];
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} __attribute__((__packed__));
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/* */
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struct capwap_message_element* capwap_vendorpayload_element_create(void* data, unsigned long datalength) {
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unsigned short elementlength;
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struct capwap_message_element* element;
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struct capwap_vendorpayload_raw_element* dataraw;
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struct capwap_vendorpayload_element* dataelement = (struct capwap_vendorpayload_element*)data;
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ASSERT(data != NULL);
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ASSERT(datalength == sizeof(struct capwap_vendorpayload_element));
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/* */
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if (!dataelement->datalength || (dataelement->datalength > CAPWAP_VENDORPAYLOAD_MAXLENGTH)) {
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return NULL;
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}
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/* Alloc block of memory */
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elementlength = sizeof(struct capwap_vendorpayload_raw_element) + dataelement->datalength;
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element = capwap_alloc(sizeof(struct capwap_message_element) + elementlength);
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if (!element) {
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capwap_outofmemory();
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}
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/* Create message element */
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memset(element, 0, sizeof(struct capwap_message_element) + elementlength);
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element->type = htons(CAPWAP_ELEMENT_VENDORPAYLOAD);
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element->length = htons(elementlength);
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dataraw = (struct capwap_vendorpayload_raw_element*)element->data;
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dataraw->vendorid = htonl(dataelement->vendorid);
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dataraw->elementid = htons(dataelement->elementid);
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memcpy(&dataraw->data[0], &dataelement->data[0], dataelement->datalength);
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return element;
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}
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/* */
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int capwap_vendorpayload_element_validate(struct capwap_message_element* element) {
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/* TODO */
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return 1;
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}
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/* */
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void* capwap_vendorpayload_element_parsing(struct capwap_message_element* element) {
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unsigned short elementlength;
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struct capwap_vendorpayload_element* data;
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struct capwap_vendorpayload_raw_element* dataraw;
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ASSERT(element);
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ASSERT(ntohs(element->type) == CAPWAP_ELEMENT_VENDORPAYLOAD);
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elementlength = ntohs(element->length);
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if (elementlength > sizeof(struct capwap_vendorpayload_raw_element)) {
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return NULL;
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}
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/* */
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dataraw = (struct capwap_vendorpayload_raw_element*)element->data;
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data = (struct capwap_vendorpayload_element*)capwap_alloc(sizeof(struct capwap_vendorpayload_element));
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if (!data) {
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capwap_outofmemory();
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}
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/* */
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data->vendorid = ntohl(dataraw->vendorid);
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data->elementid = ntohs(dataraw->elementid);
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data->datalength = elementlength - sizeof(struct capwap_vendorpayload_element);
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memcpy(&data->data[0], &dataraw->data[0], data->datalength);
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return data;
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}
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/* */
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void capwap_vendorpayload_element_free(void* data) {
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ASSERT(data != NULL);
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capwap_free(data);
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}
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