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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 (IP) */
/** */
/**************************************************************************/
/**************************************************************************/
#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"
#include "nx_icmpv6.h"
#endif /* FEATURE_NX_IPV6 */
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxd_ipv6_disable PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function disables the IPv6 for the specified IP instance. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* NX_ALREADY_ENABLED IPv6 already enabled on IP */
/* NX_NOT_SUPPORTED IPv6 not supported on this IP */
/* */
/* CALLS */
/* */
/* _nx_ipv6_multicast_leave Leave the multicast group */
/* _nxd_ipv6_default_router_table_init Initialize IPv6 routing table */
/* _nx_nd_cache_delete_internal Delete ND Cache Entry */
/* tx_mutex_get Obtain a protection mutex */
/* tx_mutex_put Release protection mutex */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* 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_disable(NX_IP *ip_ptr)
{
#ifdef FEATURE_NX_IPV6
TX_INTERRUPT_SAVE_AREA
ULONG address[4];
UINT i;
/* Make sure IPv6 is not already enabled. */
/* Cast the function pointer into a ULONG. Since this is exactly what we wish to do, disable the lint warning with the following comment: */
/*lint -e{923} suppress cast of pointer to ULONG. */
if ((ALIGN_TYPE)ip_ptr -> nx_ipv6_packet_receive == NX_NULL)
{
return(NX_SUCCESS);
}
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_IPV6_DISABLE, ip_ptr, 0, 0, 0, NX_TRACE_IP_EVENTS, 0, 0);
/* Obtain the IP mutex so we can manipulate the internal routing table. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
/* Disable Interrupt */
TX_DISABLE
/* Install IPv6 packet receive processing function pointer */
ip_ptr -> nx_ipv6_packet_receive = NX_NULL;
/* Enable Interrupt */
TX_RESTORE
/* Zero out the IPv6 default router table */
_nxd_ipv6_default_router_table_init(ip_ptr);
/* Clear IPv6 internal timers. */
ip_ptr -> nx_ipv6_reachable_timer = 0;
ip_ptr -> nx_ipv6_retrans_timer_ticks = 0;
/* Check if router solicitation is not disabled. */
#ifndef NX_DISABLE_ICMPV6_ROUTER_SOLICITATION
/* Create the all-node multicast group address, */
address[0] = 0xFF020000;
address[1] = 0;
address[2] = 0;
address[3] = 1;
#endif /* NX_DISABLE_ICMPV6_ROUTER_SOLICITATION */
/* Reset the router solicitation values . */
for (i = 0; i < NX_MAX_PHYSICAL_INTERFACES; i++)
{
if (ip_ptr -> nx_ip_interface[i].nx_interface_valid == NX_TRUE)
{
ip_ptr -> nx_ip_interface[i].nxd_interface_ipv6_address_list_head = NX_NULL;
#ifndef NX_DISABLE_ICMPV6_ROUTER_SOLICITATION
ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_max = 0;
ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_count = 0;
ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_interval = 0;
ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_timer = 0;
/* Leave all-node multicast group. */
_nx_ipv6_multicast_leave(ip_ptr, address, &ip_ptr -> nx_ip_interface[i]);
#endif /* NX_DISABLE_ICMPV6_ROUTER_SOLICITATION */
}
}
/* Remove the IPv6 addresses, and leave the corresponding multicast groups. */
for (i = 0; i < NX_MAX_IPV6_ADDRESSES; i++)
{
if (ip_ptr -> nx_ipv6_address[i].nxd_ipv6_address_valid)
{
SET_SOLICITED_NODE_MULTICAST_ADDRESS(address, ip_ptr -> nx_ipv6_address[i].nxd_ipv6_address);
_nx_ipv6_multicast_leave(ip_ptr, &address[0], ip_ptr -> nx_ipv6_address[i].nxd_ipv6_address_attached);
}
}
/* Zero out the IPv6 address structure table. */
memset(&ip_ptr -> nx_ipv6_address[0], 0, sizeof(ip_ptr -> nx_ipv6_address));
/* Clean up the ND Cache table. */
if (ip_ptr -> nx_ip_icmpv6_packet_process)
{
for (i = 0; i < NX_IPV6_NEIGHBOR_CACHE_SIZE; i++)
{
if ((ip_ptr -> nx_ipv6_nd_cache[i].nx_nd_cache_nd_status != ND_CACHE_STATE_INVALID) &&
(ip_ptr -> nx_ipv6_nd_cache[i].nx_nd_cache_interface_ptr))
{
_nx_nd_cache_delete_internal(ip_ptr, &ip_ptr -> nx_ipv6_nd_cache[i]);
}
}
}
/* Disable ND cache periodic update routine. */
ip_ptr -> nx_nd_cache_fast_periodic_update = NX_NULL;
ip_ptr -> nx_nd_cache_slow_periodic_update = NX_NULL;
/* Disable ICMPv6 services. */
ip_ptr -> nx_ip_icmpv6_packet_process = NX_NULL;
#ifdef NX_ENABLE_IPV6_PATH_MTU_DISCOVERY
ip_ptr -> nx_destination_table_periodic_update = NX_NULL;
#endif /* NX_ENABLE_IPV6_PATH_MTU_DISCOVERY */
/* Clean up the loop back address. */
#ifndef NX_DISABLE_LOOPBACK_INTERFACE
ip_ptr -> nx_ip_interface[NX_LOOPBACK_INTERFACE].nxd_interface_ipv6_address_list_head = NX_NULL;
#endif /* NX_DISABLE_LOOPBACK_INTERFACE */
/* Release the IP protection. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
/* Return successful completion. */
return(NX_SUCCESS);
#else /* !FEATURE_NX_IPV6 */
NX_PARAMETER_NOT_USED(ip_ptr);
return(NX_NOT_SUPPORTED);
#endif /* FEATURE_NX_IPV6 */
}