110 lines
3.4 KiB
C
110 lines
3.4 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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| Radio ID | Num Levels | Power Level [n] |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Type: 1042 for IEEE 802.11 Tx Power Level
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Length: >= 4
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********************************************************************/
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struct capwap_80211_txpowerlevel_raw_element {
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unsigned char radioid;
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unsigned char numlevels;
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unsigned short powerlevel[0];
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} __attribute__((__packed__));
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/* */
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struct capwap_message_element* capwap_80211_txpowerlevel_element_create(void* data, unsigned long datalength) {
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int i;
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unsigned short txpowerlength;
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struct capwap_message_element* element;
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struct capwap_80211_txpowerlevel_raw_element* dataraw;
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struct capwap_80211_txpowerlevel_element* dataelement = (struct capwap_80211_txpowerlevel_element*)data;
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ASSERT(data != NULL);
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ASSERT(datalength >= sizeof(struct capwap_80211_txpowerlevel_element));
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/* Alloc block of memory */
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txpowerlength = dataelement->numlevels * sizeof(unsigned char);
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element = capwap_alloc(sizeof(struct capwap_message_element) + sizeof(struct capwap_80211_txpowerlevel_raw_element) + txpowerlength);
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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) + sizeof(struct capwap_80211_txpowerlevel_raw_element) + txpowerlength);
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element->type = htons(CAPWAP_ELEMENT_80211_TXPOWERLEVEL);
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element->length = htons(sizeof(struct capwap_80211_txpowerlevel_raw_element) + txpowerlength);
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dataraw = (struct capwap_80211_txpowerlevel_raw_element*)element->data;
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dataraw->radioid = dataelement->radioid;
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dataraw->numlevels = dataelement->numlevels;
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for (i = 0; i < dataelement->numlevels; i++) {
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dataraw->powerlevel[i] = htons(dataelement->powerlevel[i]);
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}
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return element;
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}
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/* */
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int capwap_80211_txpowerlevel_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_80211_txpowerlevel_element_parsing(struct capwap_message_element* element) {
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int i;
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unsigned short txpowerlength;
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struct capwap_80211_txpowerlevel_element* data;
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struct capwap_80211_txpowerlevel_raw_element* dataraw;
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ASSERT(element);
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ASSERT(ntohs(element->type) == CAPWAP_ELEMENT_80211_TXPOWERLEVEL);
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txpowerlength = ntohs(element->length);
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if (txpowerlength < 4) {
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return NULL;
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}
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txpowerlength -= sizeof(struct capwap_80211_txpowerlevel_raw_element);
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if (txpowerlength > (CAPWAP_TXPOWERLEVEL_MAXLENGTH * sizeof(unsigned short))) {
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return NULL;
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}
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dataraw = (struct capwap_80211_txpowerlevel_raw_element*)element->data;
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if ((dataraw->numlevels < 1) || (dataraw->numlevels > CAPWAP_TXPOWERLEVEL_MAXLENGTH)) {
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return NULL;
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}
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/* */
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data = (struct capwap_80211_txpowerlevel_element*)capwap_alloc(sizeof(struct capwap_80211_txpowerlevel_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->radioid = dataraw->radioid;
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data->numlevels = dataraw->numlevels;
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for (i = 0; i < dataraw->numlevels; i++) {
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data->powerlevel[i] = dataraw->powerlevel[i];
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}
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return data;
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}
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/* */
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void capwap_80211_txpowerlevel_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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