97 lines
2.8 KiB
C
97 lines
2.8 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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| 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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/* */
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static void capwap_80211_txpowerlevel_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
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int i;
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struct capwap_80211_txpowerlevel_element* element = (struct capwap_80211_txpowerlevel_element*)data;
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ASSERT(data != NULL);
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func->write_u8(handle, element->radioid);
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func->write_u8(handle, element->numlevels);
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for (i = 0; i < element->numlevels; i++) {
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func->write_u16(handle, element->powerlevel[i]);
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}
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}
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/* */
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static void* capwap_80211_txpowerlevel_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
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int i;
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unsigned short length;
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struct capwap_80211_txpowerlevel_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 < 4) {
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log_printf(LOG_DEBUG, "Invalid IEEE 802.11 Tx Power Level element");
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return NULL;
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}
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length -= 2;
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if ((length % sizeof(uint16_t)) || ((length / sizeof(uint16_t)) > CAPWAP_TXPOWERLEVEL_MAXLENGTH)) {
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log_printf(LOG_DEBUG, "Invalid IEEE 802.11 Tx Power Level element");
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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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memset(data, 0, sizeof(struct capwap_80211_txpowerlevel_element));
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/* Retrieve data */
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func->read_u8(handle, &data->radioid);
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func->read_u8(handle, &data->numlevels);
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/* Check */
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if ((data->numlevels * sizeof(uint16_t)) != length) {
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log_printf(LOG_DEBUG, "Invalid IEEE 802.11 Tx Power Level element");
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capwap_free(data);
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return NULL;
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}
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for (i = 0; i < data->numlevels; i++) {
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func->read_u16(handle, &data->powerlevel[i]);
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}
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return data;
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}
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/* */
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static void* capwap_80211_txpowerlevel_element_clone(void* data) {
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ASSERT(data != NULL);
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return capwap_clone(data, sizeof(struct capwap_80211_txpowerlevel_element));
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}
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/* */
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static 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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/* */
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const struct capwap_message_elements_ops capwap_element_80211_txpowerlevel_ops = {
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.category = CAPWAP_MESSAGE_ELEMENT_ARRAY,
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.create = capwap_80211_txpowerlevel_element_create,
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.parse = capwap_80211_txpowerlevel_element_parsing,
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.clone = capwap_80211_txpowerlevel_element_clone,
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.free = capwap_80211_txpowerlevel_element_free
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};
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