common/src/nxd_ipv6_default_router_get.c


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/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2025-present Eclipse ThreadX Contributors
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/
/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** NetX Component                                                        */
/**                                                                       */
/**   Internet Protocol version 6 Default Router Table (IPv6 router)      */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE


/* Include necessary system files.  */

#include "nx_api.h"
#include "nx_ipv6.h"
#ifdef FEATURE_NX_IPV6
#include "nx_nd_cache.h"
#endif /* FEATURE_NX_IPV6 */


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _nxd_ipv6_default_router_get                         PORTABLE C     */
/*                                                           6.4.3        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Yuxin Zhou, Microsoft Corporation                                   */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function gets a router from the default IPv6 routing table.    */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    ip_ptr                                IP instance pointer           */
/*    interface_index                       Index to the interface        */
/*    router_addr                           Router IPv6 Address           */
/*    router_lifetime                       Pointer to router life time   */
/*    prefix_length                         Pointer to prefix length      */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    status                                Completion status             */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _nxd_ipv6_default_router_entry_get    Get IPv6 router               */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application code                                                    */
/*                                                                        */
/*  NOTE                                                                  */
/*                                                                        */
/*                                                                        */
/*    This function cannot be called from ISR.                            */
/*                                                                        */
/**************************************************************************/
UINT  _nxd_ipv6_default_router_get(NX_IP *ip_ptr, UINT interface_index, NXD_ADDRESS *router_addr,
                                   ULONG *router_lifetime, ULONG *prefix_length)
{
#ifdef FEATURE_NX_IPV6
UINT status;

    /* Get the first router. */
    status = _nxd_ipv6_default_router_entry_get(ip_ptr, interface_index, 0,
                                                router_addr, router_lifetime, prefix_length, NX_NULL);

    return(status);

#else /* !FEATURE_NX_IPV6 */
    NX_PARAMETER_NOT_USED(ip_ptr);
    NX_PARAMETER_NOT_USED(interface_index);
    NX_PARAMETER_NOT_USED(router_addr);
    NX_PARAMETER_NOT_USED(router_lifetime);
    NX_PARAMETER_NOT_USED(prefix_length);

    return(NX_NOT_SUPPORTED);

#endif /* FEATURE_NX_IPV6 */
}