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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Secure Component */
/** */
/** Datagram Transport Layer Security (DTLS) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SECURE_SOURCE_CODE
#include "nx_secure_dtls.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxe_secure_dtls_server_create PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors when creating a DTLS Server. */
/* */
/* INPUT */
/* */
/* server_ptr DTLS server control block */
/* ip_ptr Pointer to IP instance */
/* port Server port */
/* timeout Timeout value */
/* session_buffer DTLS sessions buffer */
/* session_buffer_size Size of DTLS sessions buffer */
/* crypto_table Crypto table */
/* crypto_metadata_buffer Encryption metadata buffer */
/* crypto_metadata_size Encryption metadata size */
/* packet_reassembly_buffer DTLS reassembly buffer */
/* packet_reassembly_buffer_size Size of reassembly buffer */
/* connect_notify Callback for new connections */
/* receive_notify Callback for received data */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_secure_dtls_server_create Actual function call */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _nxe_secure_dtls_server_create(NX_SECURE_DTLS_SERVER *server_ptr, NX_IP *ip_ptr, UINT port, ULONG timeout,
VOID *session_buffer, UINT session_buffer_size,
const NX_SECURE_TLS_CRYPTO *crypto_table,
VOID *crypto_metadata_buffer, ULONG crypto_metadata_size,
UCHAR *packet_reassembly_buffer, UINT packet_reassembly_buffer_size,
UINT (*connect_notify)(NX_SECURE_DTLS_SESSION *dtls_session, NXD_ADDRESS *ip_address, UINT port),
UINT (*receive_notify)(NX_SECURE_DTLS_SESSION *dtls_session))
{
#ifdef NX_SECURE_ENABLE_DTLS
UINT status;
UINT i;
UINT num_sessions;
NX_SECURE_DTLS_SESSION *current_session;
NX_SECURE_DTLS_SESSION *created_dtls_session;
NX_SECURE_DTLS_SERVER *created_dtls_server;
ULONG created_count;
/* Figure out number of sessions. */
num_sessions = session_buffer_size / sizeof(NX_SECURE_DTLS_SESSION);
/* Check pointers. */
if(server_ptr == NX_NULL || ip_ptr == NX_NULL || session_buffer == NX_NULL ||
crypto_metadata_buffer == NX_NULL || packet_reassembly_buffer == NX_NULL ||
connect_notify == NX_NULL || receive_notify == NX_NULL)
{
return(NX_PTR_ERROR);
}
/* Loop to check for the DTLS server already created. */
created_dtls_server = _nx_secure_dtls_server_created_ptr;
created_count = _nx_secure_dtls_server_created_count;
while (created_count--)
{
/* Is the new DTLS server already created? */
if (server_ptr == created_dtls_server)
{
/* Duplicate DTLS server created, return an error! */
return(NX_PTR_ERROR);
}
/* Move to next entry. */
created_dtls_server = created_dtls_server -> nx_dtls_server_created_next;
}
/* Check all the sessions. */
for(i = 0; i < num_sessions; ++i)
{
/* Get the current session. */
current_session = &((NX_SECURE_DTLS_SESSION *)session_buffer)[i];
/* Loop to check for the DTLS session already created. */
created_dtls_session = _nx_secure_dtls_created_ptr;
created_count = _nx_secure_dtls_created_count;
while (created_count--)
{
/* Is the new DTLS already created? */
if (current_session == created_dtls_session)
{
/* Duplicate DTLS session created, return an error! */
return(NX_PTR_ERROR);
}
/* Move to next entry. */
created_dtls_session = created_dtls_session -> nx_secure_dtls_created_next;
}
}
/* Call the actual function. */
status = _nx_secure_dtls_server_create(server_ptr, ip_ptr, port, timeout,
session_buffer, session_buffer_size, crypto_table,
crypto_metadata_buffer, crypto_metadata_size,
packet_reassembly_buffer, packet_reassembly_buffer_size,
connect_notify, receive_notify);
return(status);
#else
NX_PARAMETER_NOT_USED(server_ptr);
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(port);
NX_PARAMETER_NOT_USED(timeout);
NX_PARAMETER_NOT_USED(session_buffer);
NX_PARAMETER_NOT_USED(session_buffer_size);
NX_PARAMETER_NOT_USED(crypto_table);
NX_PARAMETER_NOT_USED(crypto_metadata_buffer);
NX_PARAMETER_NOT_USED(crypto_metadata_size);
NX_PARAMETER_NOT_USED(packet_reassembly_buffer);
NX_PARAMETER_NOT_USED(packet_reassembly_buffer_size);
NX_PARAMETER_NOT_USED(connect_notify);
NX_PARAMETER_NOT_USED(receive_notify);
return(NX_NOT_SUPPORTED);
#endif /* NX_SECURE_ENABLE_DTLS */
}