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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 Component */
/** */
/** Internet Control Message Protocol (ICMP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ipv6.h"
#include "nx_icmpv6.h"
#ifdef FEATURE_NX_IPV6
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxd_ipv6_destination_table_find_next_hop PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This is an internal function. It searches the destination table */
/* (equivalent to IPv4 static routing table) for a possible match. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP. */
/* destination_ip IP address to search for. */
/* next_hop Storage space for next hop */
/* address. */
/* */
/* OUTPUT */
/* */
/* NX_SUCCESS Valid next hop returned */
/* NX_NOT_SUCCESSFUL Invalid pointer input or no */
/* match found; next hop not */
/* returned */
/* CALLS */
/* */
/* */
/* CALLED BY */
/* */
/* _nx_icmpv6_process_redirect Process incoming redirect */
/* message. */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Yuxin Zhou Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _nxd_ipv6_destination_table_find_next_hop(NX_IP *ip_ptr, ULONG *destination_ip, ULONG *next_hop)
{
UINT i, table_size;
UINT status;
status = NX_NOT_SUCCESSFUL;
/* Next hop storage must not be valid. */
NX_ASSERT(next_hop != NX_NULL);
/* Set a local variable for convenience. */
table_size = ip_ptr -> nx_ipv6_destination_table_size;
/* Check the num of destination. */
if (table_size == 0)
{
return(NX_NOT_SUCCESSFUL);
}
/* Loop through all entries. */
for (i = 0; table_size && (i < NX_IPV6_DESTINATION_TABLE_SIZE); i++)
{
/* Skip invalid entries. */
if (!ip_ptr -> nx_ipv6_destination_table[i].nx_ipv6_destination_entry_valid)
{
continue;
}
/* Keep track of valid entries we have checked. */
table_size--;
/* Check whether or not the address is the same. */
if (CHECK_IPV6_ADDRESSES_SAME(ip_ptr -> nx_ipv6_destination_table[i].nx_ipv6_destination_entry_destination_address, destination_ip))
{
/* Copy next hop address to user-supplied storage. */
COPY_IPV6_ADDRESS(ip_ptr -> nx_ipv6_destination_table[i].nx_ipv6_destination_entry_next_hop, next_hop);
status = NX_SUCCESS;
/* break out of the for loop */
break;
}
}
return(status);
}
#endif /* FEATURE_NX_IPV6 */
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