1436fc9e5f
The struct is already conveys the scope of the operations, repeating it in the name of ops again is redundant and bloats the resulting source code. Rename the opt to shorter versions.
207 lines
7.7 KiB
C
207 lines
7.7 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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| 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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capwap_logging_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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capwap_logging_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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capwap_logging_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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capwap_logging_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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capwap_logging_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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capwap_logging_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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capwap_logging_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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capwap_logging_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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struct capwap_message_elements_ops capwap_element_acdescriptor_ops = {
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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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