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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"
#include "nx_nd_cache.h"
#ifdef FEATURE_NX_IPV6
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxd_ipv6_default_router_table_init PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function initializes IPv6 routing table. Note it is up to the */
/* caller to obtain mutex protection before writing to the table. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP control block */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* nx_ipv6_enable */
/* */
/* NOTE */
/* */
/* This function cannot be called from ISR. */
/* */
/**************************************************************************/
VOID _nxd_ipv6_default_router_table_init(NX_IP *ip_ptr)
{
ULONG i;
/* Initialize each entry in the default router table to null. */
for (i = 0; i < NX_IPV6_DEFAULT_ROUTER_TABLE_SIZE; i++)
{
ip_ptr -> nx_ipv6_default_router_table[i].nx_ipv6_default_router_entry_flag = 0;
ip_ptr -> nx_ipv6_default_router_table[i].nx_ipv6_default_router_entry_life_time = 0;
ip_ptr -> nx_ipv6_default_router_table[i].nx_ipv6_default_router_entry_neighbor_cache_ptr = NX_NULL;
}
/* Set the initial size to zero. */
ip_ptr -> nx_ipv6_default_router_table_size = 0;
/* Initialize the index for recruiting less "reachable" routers
when the current router cannot be reached. */
ip_ptr -> nx_ipv6_default_router_table_round_robin_index = 0;
/* Initialize the start of the prefix table (linked list) to NULL. */
ip_ptr -> nx_ipv6_prefix_list_table[0].nx_ipv6_prefix_entry_prev = NX_NULL;
ip_ptr -> nx_ipv6_prefix_list_table[0].nx_ipv6_prefix_entry_next = &ip_ptr -> nx_ipv6_prefix_list_table[1];
/* Link up the entries in the prefix table. */
for (i = 1; i < NX_IPV6_PREFIX_LIST_TABLE_SIZE - 1; i++)
{
ip_ptr -> nx_ipv6_prefix_list_table[i].nx_ipv6_prefix_entry_prev = &ip_ptr -> nx_ipv6_prefix_list_table[i - 1];
ip_ptr -> nx_ipv6_prefix_list_table[i].nx_ipv6_prefix_entry_next = &ip_ptr -> nx_ipv6_prefix_list_table[i + 1];
}
/* Null terminate the end of the prefix table (linked list). */
ip_ptr -> nx_ipv6_prefix_list_table[i].nx_ipv6_prefix_entry_prev = &ip_ptr -> nx_ipv6_prefix_list_table[i - 1];
ip_ptr -> nx_ipv6_prefix_list_table[i].nx_ipv6_prefix_entry_next = NX_NULL;
/* Set the free list pointer to the 1st entry. */
ip_ptr -> nx_ipv6_prefix_entry_free_list = &ip_ptr -> nx_ipv6_prefix_list_table[0];
ip_ptr -> nx_ipv6_prefix_list_ptr = NX_NULL;
/* All done, return. */
}
#endif /* FEATURE_NX_IPV6 */
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