208 lines
7.8 KiB
C
208 lines
7.8 KiB
C
#include "capwap.h"
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#include "array.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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| Stations | Limit |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Active WTPs | Max WTPs |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Security | R-MAC Field | Reserved1 | DTLS Policy |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| AC Information Sub-Element...
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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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| AC Information Vendor Identifier |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| AC Information Type | AC Information Length |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| AC Information Data...
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Type: 1 for AC Descriptor
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Length: >= 12
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********************************************************************/
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/* */
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static void capwap_acdescriptor_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_acdescriptor_element* element = (struct capwap_acdescriptor_element*)data;
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ASSERT(data != NULL);
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ASSERT(!(element->security & ~CAPWAP_ACDESC_SECURITY_MASK));
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ASSERT(!(element->dtlspolicy & ~CAPWAP_ACDESC_DTLS_POLICY_MASK));
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ASSERT((element->rmacfield == CAPWAP_ACDESC_RMACFIELD_SUPPORTED) || (element->rmacfield == CAPWAP_ACDESC_RMACFIELD_NOTSUPPORTED));
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ASSERT(element->descsubelement != NULL);
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/* */
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func->write_u16(handle, element->stations);
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func->write_u16(handle, element->stationlimit);
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func->write_u16(handle, element->activewtp);
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func->write_u16(handle, element->maxwtp);
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func->write_u8(handle, element->security);
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func->write_u8(handle, element->rmacfield);
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func->write_u8(handle, 0);
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func->write_u8(handle, element->dtlspolicy);
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/* */
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for (i = 0; i < element->descsubelement->count; i++) {
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struct capwap_acdescriptor_desc_subelement* desc = (struct capwap_acdescriptor_desc_subelement*)capwap_array_get_item_pointer(element->descsubelement, i);
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ASSERT(desc->length > 0);
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ASSERT(desc->data != NULL);
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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, desc->length);
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func->write_block(handle, desc->data, desc->length);
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}
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}
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/* */
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static void* capwap_acdescriptor_element_clone(void* data) {
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int i;
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struct capwap_acdescriptor_element* cloneelement;
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struct capwap_acdescriptor_element* element = (struct capwap_acdescriptor_element*)data;
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ASSERT(data != NULL);
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cloneelement = capwap_clone(data, sizeof(struct capwap_acdescriptor_element));
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cloneelement->descsubelement = capwap_array_create(sizeof(struct capwap_acdescriptor_desc_subelement), 0, 1);
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for (i = 0; i < element->descsubelement->count; i++) {
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struct capwap_acdescriptor_desc_subelement* desc = (struct capwap_acdescriptor_desc_subelement*)capwap_array_get_item_pointer(element->descsubelement, i);
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struct capwap_acdescriptor_desc_subelement* clonedesc = (struct capwap_acdescriptor_desc_subelement*)capwap_array_get_item_pointer(cloneelement->descsubelement, i);
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memcpy(clonedesc, desc, sizeof(struct capwap_acdescriptor_desc_subelement));
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if (desc->length) {
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clonedesc->data = capwap_clone(desc->data, desc->length);
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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_acdescriptor_element_free(void* data) {
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int i;
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struct capwap_acdescriptor_element* element = (struct capwap_acdescriptor_element*)data;
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ASSERT(element != 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_acdescriptor_desc_subelement* desc = (struct capwap_acdescriptor_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->descsubelement);
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capwap_free(data);
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}
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/* */
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static void* capwap_acdescriptor_element_parsing(capwap_message_elements_handle handle, struct capwap_read_message_elements_ops* func) {
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struct capwap_acdescriptor_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) < 12) {
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log_printf(LOG_DEBUG, "Invalid AC Descriptor element: underbuffer");
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return NULL;
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}
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/* */
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data = (struct capwap_acdescriptor_element*)capwap_alloc(sizeof(struct capwap_acdescriptor_element));
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memset(data, 0, sizeof(struct capwap_acdescriptor_element));
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data->descsubelement = capwap_array_create(sizeof(struct capwap_acdescriptor_desc_subelement), 0, 1);
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/* Retrieve data */
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func->read_u16(handle, &data->stations);
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func->read_u16(handle, &data->stationlimit);
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func->read_u16(handle, &data->activewtp);
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func->read_u16(handle, &data->maxwtp);
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/* Check */
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if (data->stations > data->stationlimit) {
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log_printf(LOG_DEBUG, "Invalid AC Descriptor element: stations > stationlimit");
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capwap_acdescriptor_element_free(data);
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return NULL;
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} else if (data->activewtp > data->maxwtp) {
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log_printf(LOG_DEBUG, "Invalid AC Descriptor element: activewtp > maxwtp");
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capwap_acdescriptor_element_free(data);
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return NULL;
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}
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/* */
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func->read_u8(handle, &data->security);
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func->read_u8(handle, &data->rmacfield);
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func->read_u8(handle, NULL);
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func->read_u8(handle, &data->dtlspolicy);
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/* */
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if (data->security & ~CAPWAP_ACDESC_SECURITY_MASK) {
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log_printf(LOG_DEBUG, "Invalid AC Descriptor element: security");
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capwap_acdescriptor_element_free(data);
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return NULL;
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} else if (data->dtlspolicy & ~CAPWAP_ACDESC_DTLS_POLICY_MASK) {
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log_printf(LOG_DEBUG, "Invalid AC Descriptor element: dtlspolicy");
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capwap_acdescriptor_element_free(data);
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return NULL;
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} else if ((data->rmacfield != CAPWAP_ACDESC_RMACFIELD_SUPPORTED) && (data->rmacfield != CAPWAP_ACDESC_RMACFIELD_NOTSUPPORTED)) {
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log_printf(LOG_DEBUG, "Invalid AC Descriptor element: rmacfield");
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capwap_acdescriptor_element_free(data);
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return NULL;
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}
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/* Description Subelement */
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while (func->read_ready(handle) > 0) {
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unsigned short length;
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struct capwap_acdescriptor_desc_subelement* desc = (struct capwap_acdescriptor_desc_subelement*)capwap_array_get_item_pointer(data->descsubelement, data->descsubelement->count);
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/* */
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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, &desc->length);
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if ((desc->type != CAPWAP_ACDESC_SUBELEMENT_HARDWAREVERSION) && (desc->type != CAPWAP_ACDESC_SUBELEMENT_SOFTWAREVERSION)) {
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log_printf(LOG_DEBUG, "Invalid AC Descriptor subelement: type");
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capwap_acdescriptor_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 > CAPWAP_ACDESC_SUBELEMENT_MAXDATA) || (length < desc->length)) {
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log_printf(LOG_DEBUG, "Invalid AC Descriptor subelement: length");
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capwap_acdescriptor_element_free(data);
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return NULL;
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}
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desc->data = (uint8_t*)capwap_alloc(desc->length + 1);
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func->read_block(handle, desc->data, desc->length);
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desc->data[desc->length] = 0;
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}
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return data;
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}
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/* */
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const struct capwap_message_elements_ops capwap_element_acdescriptor_ops = {
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.category = CAPWAP_MESSAGE_ELEMENT_SINGLE,
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.create = capwap_acdescriptor_element_create,
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.parse = capwap_acdescriptor_element_parsing,
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.clone = capwap_acdescriptor_element_clone,
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.free = capwap_acdescriptor_element_free
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};
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