109 lines
3.8 KiB
C
109 lines
3.8 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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| MAC Address |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| MAC Address |A|C| Flags |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Pairwise TSC |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Pairwise TSC | Pairwise RSC |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Pairwise RSC |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Key...
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+-+-+-+-+-+-+-+-
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Type: 1038 for IEEE 802.11 Station Session Key
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Length: >= 25
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********************************************************************/
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/* */
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static void capwap_80211_stationkey_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
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struct capwap_80211_stationkey_element* element = (struct capwap_80211_stationkey_element*)data;
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ASSERT(data != NULL);
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func->write_block(handle, element->address, MACADDRESS_EUI48_LENGTH);
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func->write_u16(handle, element->flags);
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func->write_block(handle, element->pairwisetsc, CAPWAP_STATION_SESSION_KEY_PAIRWISE_TSC_LENGTH);
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func->write_block(handle, element->pairwisersc, CAPWAP_STATION_SESSION_KEY_PAIRWISE_RSC_LENGTH);
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func->write_block(handle, element->key, element->keylength);
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}
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/* */
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static void* capwap_80211_stationkey_element_parsing(capwap_message_elements_handle handle,
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struct capwap_read_message_elements_ops* func)
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{
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unsigned short length;
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struct capwap_80211_stationkey_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 < 25) {
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log_printf(LOG_DEBUG, "Invalid IEEE 802.11 Station Session Key element");
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return NULL;
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}
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/* */
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data = (struct capwap_80211_stationkey_element *)
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capwap_alloc(sizeof(struct capwap_80211_stationkey_element));
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memset(data, 0, sizeof(struct capwap_80211_stationkey_element));
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data->keylength = length - 20;
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data->key = (uint8_t*)capwap_alloc(data->keylength);
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/* Retrieve data */
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func->read_block(handle, data->address, MACADDRESS_EUI48_LENGTH);
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func->read_u16(handle, &data->flags);
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func->read_block(handle, data->pairwisetsc, CAPWAP_STATION_SESSION_KEY_PAIRWISE_TSC_LENGTH);
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func->read_block(handle, data->pairwisersc, CAPWAP_STATION_SESSION_KEY_PAIRWISE_RSC_LENGTH);
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func->read_block(handle, data->key, data->keylength);
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return data;
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}
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/* */
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static void* capwap_80211_stationkey_element_clone(void* data) {
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struct capwap_80211_stationkey_element* cloneelement;
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ASSERT(data != NULL);
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cloneelement = capwap_clone(data, sizeof(struct capwap_80211_stationkey_element));
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if (cloneelement->keylength > 0) {
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cloneelement->key = capwap_clone(((struct capwap_80211_stationkey_element*)data)->key, cloneelement->keylength);
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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_80211_stationkey_element_free(void* data) {
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struct capwap_80211_stationkey_element* element = (struct capwap_80211_stationkey_element*)data;
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ASSERT(data != NULL);
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if (element->key) {
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capwap_free(element->key);
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}
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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_stationkey_ops = {
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.category = CAPWAP_MESSAGE_ELEMENT_SINGLE,
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.create = capwap_80211_stationkey_element_create,
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.parse = capwap_80211_stationkey_element_parsing,
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.clone = capwap_80211_stationkey_element_clone,
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.free = capwap_80211_stationkey_element_free
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};
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