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common/src/nxd_ipv6_default_router_number_of_entries_get.c
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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 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_number_of_entries_get PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function gets router entries from the default IPv6 routing */
/* table. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* if_index Interface Index */
/* num_entries Destination for number of */
/* IPv6 routers on a specified */
/* network interface */
/* */
/* OUTPUT */
/* */
/* Status Completion status */
/* */
/* CALLS */
/* */
/* tx_mutex_get Obtain protection mutex */
/* tx_mutex_put Release protection mutex */
/* */
/* CALLED BY */
/* */
/* Application code */
/* */
/* NOTE */
/* */
/* This function cannot be called from ISR. */
/* */
/* 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_default_router_number_of_entries_get(NX_IP *ip_ptr, UINT if_index, UINT *num_entries)
{
#ifdef FEATURE_NX_IPV6
UINT entries;
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 0. */
entries = 0;
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 != if_index)
{
continue;
}
/* Find router entriy. */
entries++;
}
/* Release the mutex. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
*num_entries = entries;
return(NX_SUCCESS);
#else /* !FEATURE_NX_IPV6 */
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(if_index);
NX_PARAMETER_NOT_USED(num_entries);
return(NX_NOT_SUPPORTED);
#endif /* FEATURE_NX_IPV6 */
}