96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
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#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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| IP Address |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Status | Length | MAC Address ...
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Type: 21 for Duplicate IPv4 Address
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Length: >= 12
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********************************************************************/
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/* */
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static void capwap_duplicateipv4_element_create(void* data, capwap_message_elements_handle handle, struct capwap_write_message_elements_ops* func) {
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struct capwap_duplicateipv4_element* element = (struct capwap_duplicateipv4_element*)data;
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ASSERT(data != NULL);
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func->write_block(handle, (uint8_t*)&element->address, sizeof(struct in_addr));
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func->write_u8(handle, element->status);
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func->write_u8(handle, element->length);
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func->write_block(handle, element->macaddress, element->length);
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}
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/* */
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static void capwap_duplicateipv4_element_free(void* data) {
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struct capwap_duplicateipv4_element* element = (struct capwap_duplicateipv4_element*)data;
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ASSERT(data != NULL);
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if (element->macaddress) {
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capwap_free(element->macaddress);
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}
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capwap_free(element);
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}
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/* */
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static void* capwap_duplicateipv4_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
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unsigned short length;
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struct capwap_duplicateipv4_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 < 12) {
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capwap_logging_debug("Invalid Duplicate IPv4 Address element");
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return NULL;
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}
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length -= 6;
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/* */
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data = (struct capwap_duplicateipv4_element*)capwap_alloc(sizeof(struct capwap_duplicateipv4_element));
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if (!data) {
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capwap_outofmemory();
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}
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/* Retrieve data */
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memset(data, 0, sizeof(struct capwap_duplicateipv4_element));
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func->read_block(handle, (uint8_t*)&data->address, sizeof(struct in_addr));
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func->read_u8(handle, &data->status);
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func->read_u8(handle, &data->length);
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if (length != data->length) {
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capwap_duplicateipv4_element_free((void*)data);
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capwap_logging_debug("Invalid Duplicate IPv4 Address element");
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return NULL;
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}
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data->macaddress = (uint8_t*)capwap_alloc(data->length);
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if (!data->macaddress) {
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capwap_outofmemory();
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}
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func->read_block(handle, data->macaddress, data->length);
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return data;
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}
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/* */
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struct capwap_message_elements_ops capwap_element_duplicateipv4_ops = {
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.create_message_element = capwap_duplicateipv4_element_create,
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.parsing_message_element = capwap_duplicateipv4_element_parsing,
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.free_parsed_message_element = capwap_duplicateipv4_element_free
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};
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