162 lines
5.5 KiB
C
162 lines
5.5 KiB
C
#include "capwap.h"
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#include "capwap_array.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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| Board Data Sub-Element...
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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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| Board Data Type | Board Data Length |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Board Data Value...
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Type: 38 for WTP Board Data
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Length: >=14
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********************************************************************/
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struct capwap_wtpboarddata_raw_element {
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unsigned long vendor;
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char data[0];
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} __attribute__((__packed__));
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struct capwap_wtpboarddata_raw_board_subelement {
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unsigned short type;
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unsigned short length;
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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_wtpboarddata_element_create(void* data, unsigned long datalength) {
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char* pos;
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unsigned long i;
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unsigned short length;
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struct capwap_message_element* element;
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struct capwap_wtpboarddata_raw_element* dataraw;
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struct capwap_wtpboarddata_element* dataelement = (struct capwap_wtpboarddata_element*)data;
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ASSERT(data != NULL);
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ASSERT(datalength >= sizeof(struct capwap_wtpboarddata_element));
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ASSERT(dataelement->boardsubelement != NULL);
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/* Calc length packet */
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length = sizeof(struct capwap_wtpboarddata_raw_element);
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for (i = 0; i < dataelement->boardsubelement->count; i++) {
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struct capwap_wtpboarddata_board_subelement* board = (struct capwap_wtpboarddata_board_subelement*)capwap_array_get_item_pointer(dataelement->boardsubelement, i);
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length += sizeof(struct capwap_wtpboarddata_raw_board_subelement) + board->length;
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}
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/* Alloc block of memory */
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element = capwap_alloc(sizeof(struct capwap_message_element) + length);
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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) + length);
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element->type = htons(CAPWAP_ELEMENT_WTPBOARDDATA);
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element->length = htons(length);
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/* */
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dataraw = (struct capwap_wtpboarddata_raw_element*)element->data;
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dataraw->vendor = htonl(dataelement->vendor);
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pos = dataraw->data;
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/* Board Sub-Element */
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for (i = 0; i < dataelement->boardsubelement->count; i++) {
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struct capwap_wtpboarddata_raw_board_subelement* boardraw = (struct capwap_wtpboarddata_raw_board_subelement*)pos;
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struct capwap_wtpboarddata_board_subelement* board = (struct capwap_wtpboarddata_board_subelement*)capwap_array_get_item_pointer(dataelement->boardsubelement, i);
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boardraw->type = htons(board->type);
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boardraw->length = htons(board->length);
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memcpy(boardraw->data, board->data, board->length);
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pos += sizeof(struct capwap_wtpboarddata_raw_board_subelement) + board->length;
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}
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return element;
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}
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/* */
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int capwap_wtpboarddata_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_wtpboarddata_element_parsing(struct capwap_message_element* element) {
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long i;
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char* pos;
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long length;
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struct capwap_wtpboarddata_element* data;
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struct capwap_wtpboarddata_raw_element* dataraw;
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ASSERT(element);
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ASSERT(ntohs(element->type) == CAPWAP_ELEMENT_WTPBOARDDATA);
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length = (long)ntohs(element->length);
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if (length < 14) {
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capwap_logging_debug("Invalid WTP Board Data element");
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return NULL;
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}
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/* */
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dataraw = (struct capwap_wtpboarddata_raw_element*)element->data;
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data = (struct capwap_wtpboarddata_element*)capwap_alloc(sizeof(struct capwap_wtpboarddata_element));
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data->boardsubelement = capwap_array_create(sizeof(struct capwap_wtpboarddata_board_subelement), 0);
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/* */
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data->vendor = ntohl(dataraw->vendor);
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pos = dataraw->data;
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length -= sizeof(struct capwap_wtpboarddata_raw_element);
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/* Board Subelement */
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i = 0;
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while (length > 0) {
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struct capwap_wtpboarddata_board_subelement* board = (struct capwap_wtpboarddata_board_subelement*)capwap_array_get_item_pointer(data->boardsubelement, i);
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struct capwap_wtpboarddata_raw_board_subelement* boardraw = (struct capwap_wtpboarddata_raw_board_subelement*)pos;
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unsigned short boardlength = ntohs(boardraw->length);
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unsigned short boardrawlength = sizeof(struct capwap_wtpboarddata_raw_board_subelement) + boardlength;
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if ((boardlength > CAPWAP_BOARD_SUBELEMENT_MAXDATA) || (length < boardrawlength)) {
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capwap_logging_debug("Invalid WTP Board Data element");
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capwap_wtpboarddata_element_free(data);
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return NULL;
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}
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/* */
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board->type = ntohs(boardraw->type);
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board->length = boardlength;
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memcpy(board->data, boardraw->data, boardlength);
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/* */
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i++;
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pos += boardrawlength;
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length -= boardrawlength;
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}
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return data;
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}
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/* */
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void capwap_wtpboarddata_element_free(void* data) {
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struct capwap_wtpboarddata_element* dataelement = (struct capwap_wtpboarddata_element*)data;
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ASSERT(dataelement != NULL);
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ASSERT(dataelement->boardsubelement != NULL);
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capwap_array_free(dataelement->boardsubelement);
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capwap_free(dataelement);
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}
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