237 lines
8.7 KiB
C
237 lines
8.7 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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| Max Radios | Radios in use | Num Encrypt |Encryp Sub-Elmt|
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Encryption Sub-Element | Descriptor Sub-Element...
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 1 2
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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
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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|Resvd| WBID | Encryption Capabilities |
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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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| Descriptor Vendor Identifier |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Descriptor Type | Descriptor Length |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Descriptor Data...
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Type: 39 for WTP Descriptor
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Length: >= 33
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********************************************************************/
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/* */
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static void capwap_wtpdescriptor_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_wtpdescriptor_element* element = (struct capwap_wtpdescriptor_element*)data;
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ASSERT(data != NULL);
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ASSERT(element->maxradios >= element->radiosinuse);
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ASSERT(element->encryptsubelement->count > 0);
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ASSERT(element->descsubelement->count > 0);
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/* */
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func->write_u8(handle, element->maxradios);
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func->write_u8(handle, element->radiosinuse);
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func->write_u8(handle, element->encryptsubelement->count);
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/* */
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for (i = 0; i < element->encryptsubelement->count; i++) {
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struct capwap_wtpdescriptor_encrypt_subelement* desc = (struct capwap_wtpdescriptor_encrypt_subelement*)capwap_array_get_item_pointer(element->encryptsubelement, i);
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ASSERT((desc->wbid & CAPWAP_WTPDESC_SUBELEMENT_WBID_MASK) == desc->wbid);
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func->write_u8(handle, desc->wbid);
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func->write_u16(handle, desc->capabilities);
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}
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/* */
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for (i = 0; i < element->descsubelement->count; i++) {
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uint16_t length;
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struct capwap_wtpdescriptor_desc_subelement* desc = (struct capwap_wtpdescriptor_desc_subelement*)capwap_array_get_item_pointer(element->descsubelement, i);
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ASSERT((desc->type >= CAPWAP_WTPDESC_SUBELEMENT_TYPE_FIRST) && (desc->type <= CAPWAP_WTPDESC_SUBELEMENT_TYPE_LAST));
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length = strlen((char*)desc->data);
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ASSERT(length > 0);
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func->write_u32(handle, desc->vendor);
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func->write_u16(handle, desc->type);
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func->write_u16(handle, length);
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func->write_block(handle, desc->data, length);
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}
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}
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/* */
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static void* capwap_wtpdescriptor_element_clone(void* data) {
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int i;
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struct capwap_wtpdescriptor_element* cloneelement;
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struct capwap_wtpdescriptor_element* element = (struct capwap_wtpdescriptor_element*)data;
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ASSERT(data != NULL);
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cloneelement = capwap_clone(data, sizeof(struct capwap_wtpdescriptor_element));
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cloneelement->encryptsubelement = capwap_array_create(sizeof(struct capwap_wtpdescriptor_encrypt_subelement), 0, 0);
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for (i = 0; i < element->encryptsubelement->count; i++) {
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memcpy(capwap_array_get_item_pointer(cloneelement->encryptsubelement, i), capwap_array_get_item_pointer(element->encryptsubelement, i), sizeof(struct capwap_wtpdescriptor_encrypt_subelement));
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}
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cloneelement->descsubelement = capwap_array_create(sizeof(struct capwap_wtpdescriptor_desc_subelement), 0, 1);
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for (i = 0; i < element->descsubelement->count; i++) {
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struct capwap_wtpdescriptor_desc_subelement* desc = (struct capwap_wtpdescriptor_desc_subelement*)capwap_array_get_item_pointer(element->descsubelement, i);
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struct capwap_wtpdescriptor_desc_subelement* clonedesc = (struct capwap_wtpdescriptor_desc_subelement*)capwap_array_get_item_pointer(cloneelement->descsubelement, i);
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memcpy(clonedesc, desc, sizeof(struct capwap_wtpdescriptor_desc_subelement));
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if (desc->data) {
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clonedesc->data = (uint8_t*)capwap_duplicate_string((char*)desc->data);
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}
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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_wtpdescriptor_element_free(void* data) {
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int i;
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struct capwap_wtpdescriptor_element* element = (struct capwap_wtpdescriptor_element*)data;
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ASSERT(data != NULL);
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ASSERT(element->encryptsubelement != NULL);
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ASSERT(element->descsubelement != NULL);
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/* */
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for (i = 0; i < element->descsubelement->count; i++) {
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struct capwap_wtpdescriptor_desc_subelement* desc = (struct capwap_wtpdescriptor_desc_subelement*)capwap_array_get_item_pointer(element->descsubelement, i);
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if (desc->data) {
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capwap_free(desc->data);
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}
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}
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capwap_array_free(element->encryptsubelement);
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capwap_array_free(element->descsubelement);
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capwap_free(data);
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}
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/* */
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static void* capwap_wtpdescriptor_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
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uint8_t i;
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uint8_t encryptlength;
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struct capwap_wtpdescriptor_element* data;
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ASSERT(handle != NULL);
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ASSERT(func != NULL);
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if (func->read_ready(handle) < 33) {
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capwap_logging_debug("Invalid WTP Descriptor element: underbufer");
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return NULL;
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}
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/* */
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data = (struct capwap_wtpdescriptor_element*)capwap_alloc(sizeof(struct capwap_wtpdescriptor_element));
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data->encryptsubelement = capwap_array_create(sizeof(struct capwap_wtpdescriptor_encrypt_subelement), 0, 0);
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data->descsubelement = capwap_array_create(sizeof(struct capwap_wtpdescriptor_desc_subelement), 0, 1);
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/* Retrieve data */
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func->read_u8(handle, &data->maxradios);
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func->read_u8(handle, &data->radiosinuse);
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func->read_u8(handle, &encryptlength);
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/* Check */
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if (!encryptlength) {
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capwap_wtpdescriptor_element_free(data);
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capwap_logging_debug("Invalid WTP Descriptor element: invalid encryptlength");
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return NULL;
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} else if (data->maxradios < data->radiosinuse) {
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capwap_wtpdescriptor_element_free(data);
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capwap_logging_debug("Invalid WTP Descriptor element: invalid radio");
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return NULL;
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}
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/* Encryption Subelement */
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for (i = 0; i < encryptlength; i++) {
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struct capwap_wtpdescriptor_encrypt_subelement* desc;
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/* Check */
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if (func->read_ready(handle) < 3) {
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capwap_logging_debug("Invalid WTP Descriptor subelement: underbuffer");
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capwap_wtpdescriptor_element_free(data);
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return NULL;
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}
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/* */
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desc = (struct capwap_wtpdescriptor_encrypt_subelement*)capwap_array_get_item_pointer(data->encryptsubelement, data->encryptsubelement->count);
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func->read_u8(handle, &desc->wbid);
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func->read_u16(handle, &desc->capabilities);
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if ((desc->wbid & CAPWAP_WTPDESC_SUBELEMENT_WBID_MASK) != desc->wbid) {
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capwap_wtpdescriptor_element_free(data);
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capwap_logging_debug("Invalid WTP Descriptor element: invalid wbid");
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return NULL;
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}
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}
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/* WTP Description Subelement */
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while (func->read_ready(handle) > 0) {
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unsigned short length;
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uint16_t lengthdesc;
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struct capwap_wtpdescriptor_desc_subelement* desc;
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/* Check */
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if (func->read_ready(handle) < 8) {
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capwap_logging_debug("Invalid WTP Descriptor subelement: underbuffer");
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capwap_wtpdescriptor_element_free(data);
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return NULL;
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}
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/* */
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desc = (struct capwap_wtpdescriptor_desc_subelement*)capwap_array_get_item_pointer(data->descsubelement, data->descsubelement->count);
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func->read_u32(handle, &desc->vendor);
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func->read_u16(handle, &desc->type);
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func->read_u16(handle, &lengthdesc);
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if ((desc->type < CAPWAP_WTPDESC_SUBELEMENT_TYPE_FIRST) || (desc->type > CAPWAP_WTPDESC_SUBELEMENT_TYPE_LAST)) {
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capwap_logging_debug("Invalid WTP Descriptor subelement: invalid type");
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capwap_wtpdescriptor_element_free(data);
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return NULL;
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}
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/* Check buffer size */
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length = func->read_ready(handle);
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if (!length || (length > CAPWAP_WTPDESC_SUBELEMENT_MAXDATA) || (length < lengthdesc)) {
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capwap_logging_debug("Invalid WTP Descriptor element");
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capwap_wtpdescriptor_element_free(data);
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return NULL;
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}
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desc->data = (uint8_t*)capwap_alloc(lengthdesc + 1);
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func->read_block(handle, desc->data, lengthdesc);
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desc->data[lengthdesc] = 0;
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}
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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_wtpdescriptor_ops = {
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.create_message_element = capwap_wtpdescriptor_element_create,
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.parsing_message_element = capwap_wtpdescriptor_element_parsing,
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.clone_message_element = capwap_wtpdescriptor_element_clone,
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.free_message_element = capwap_wtpdescriptor_element_free
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};
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