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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_entry_get PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function gets a router entry from the default IPv6 routing */
/* table. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* interface_index Index to the interface */
/* entry_index Entry Index */
/* router_addr Router IPv6 Address */
/* router_lifetime Pointer to router life time */
/* prefix_length Pointer to prefix length */
/* configuration_method Pointer to the information */
/* on how the entry was */
/* configured */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* tx_mutex_get Obtain protection mutex */
/* tx_mutex_put Release protection mutex */
/* */
/* CALLED BY */
/* */
/* Application code */
/* _nxd_ipv6_default_router_get */
/* */
/* NOTE */
/* */
/* */
/* This function cannot be called from ISR. */
/* */
/**************************************************************************/
UINT _nxd_ipv6_default_router_entry_get(NX_IP *ip_ptr, UINT interface_index, UINT entry_index,
NXD_ADDRESS *router_addr, ULONG *router_lifetime,
ULONG *prefix_length, ULONG *configuration_method)
{
#ifdef FEATURE_NX_IPV6
UINT status;
UINT i;
NX_IPV6_DEFAULT_ROUTER_ENTRY *rt_entry;
/* Obtain protection on this IP instance for access into the router table. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
/* Initialize the return value to be NX_NOT_FOUND. Once the router address is set,
the return value is set to NX_SUCCESS. */
status = NX_NOT_FOUND;
for (i = 0; i < NX_IPV6_DEFAULT_ROUTER_TABLE_SIZE; i++)
{
rt_entry = &ip_ptr -> nx_ipv6_default_router_table[i];
/* Skip invalid entries. */
if (rt_entry -> nx_ipv6_default_router_entry_flag == 0)
{
continue;
}
/* Match the interface. */
if (rt_entry -> nx_ipv6_default_router_entry_interface_ptr -> nx_interface_index != (UCHAR)interface_index)
{
continue;
}
/* Match the entry index */
if (entry_index > 0)
{
entry_index--;
}
else
{
if (router_addr)
{
router_addr -> nxd_ip_version = NX_IP_VERSION_V6;
COPY_IPV6_ADDRESS(&(rt_entry -> nx_ipv6_default_router_entry_router_address[0]),
&router_addr -> nxd_ip_address.v6[0]);
}
if (router_lifetime)
{
*router_lifetime = rt_entry -> nx_ipv6_default_router_entry_life_time;
}
if (prefix_length)
{
if ((rt_entry -> nx_ipv6_default_router_entry_router_address[0] & (UINT)0xFFC00000) == (UINT)0xFE800000)
{
*prefix_length = 10;
}
else
{
*prefix_length = 64;
}
}
if (configuration_method)
{
*configuration_method = (rt_entry -> nx_ipv6_default_router_entry_flag &
(UCHAR)(~NX_IPV6_ROUTE_TYPE_VALID));
}
status = NX_SUCCESS;
break;
}
}
/* Release the mutex. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
return(status);
#else /* !FEATURE_NX_IPV6 */
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(interface_index);
NX_PARAMETER_NOT_USED(entry_index);
NX_PARAMETER_NOT_USED(router_addr);
NX_PARAMETER_NOT_USED(router_lifetime);
NX_PARAMETER_NOT_USED(prefix_length);
NX_PARAMETER_NOT_USED(configuration_method);
return(NX_NOT_SUPPORTED);
#endif /* FEATURE_NX_IPV6 */
}
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