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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_ip.h"
#include "nx_nd_cache.h"
#include "nx_icmpv6.h"
#endif /* FEATURE_NX_IPV6 */
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxd_ipv6_enable PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function enables the IPv6 for the specified IP instance. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_ipv6_multicast_join Join the multicast group */
/* _nxd_ipv6_default_router_table_init Initialize IPv6 routing table */
/* _nx_ip_fast_periodic_timer_create Create timer for IPv6 events */
/* 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_enable(NX_IP *ip_ptr)
{
#ifdef FEATURE_NX_IPV6
TX_INTERRUPT_SAVE_AREA
UINT i;
#ifndef NX_DISABLE_ICMPV6_ROUTER_SOLICITATION
ULONG address[4];
#endif /* NX_DISABLE_ICMPV6_ROUTER_SOLICITATION */
/* Make sure IPv6 is not already enabled. */
if (ip_ptr -> nx_ipv6_packet_receive)
{
return(NX_ALREADY_ENABLED);
}
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_IPV6_ENABLE, 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_ipv6_packet_receive;
/* Enable Interrupt */
TX_RESTORE
/* Initialize IPv6 default router table */
_nxd_ipv6_default_router_table_init(ip_ptr);
/* Set the default reachable timer. */
ip_ptr -> nx_ipv6_reachable_timer = NX_REACHABLE_TIME;
/*
Set the default retrans timer. The retrans timer value is
expressed in millisecond. To compute the timer ticks, first
covert the retrans timer to second and then multiply
the system_ticks_per_second value, or multiply system_ticks_per_second
before doing division.
If the retrans_timer is smaller than tick resolution, set it to 1.
*/
#if ((NX_RETRANS_TIMER * NX_IP_FAST_TIMER_RATE) > 1000)
ip_ptr -> nx_ipv6_retrans_timer_ticks = (NX_RETRANS_TIMER * NX_IP_FAST_TIMER_RATE) / 1000;
#else
ip_ptr -> nx_ipv6_retrans_timer_ticks = 1;
#endif
/* Set the default hop limit. */
ip_ptr -> nx_ipv6_hop_limit = 0xFF;
/* Set index of each address. */
for (i = 0; i < (NX_MAX_IPV6_ADDRESSES + NX_LOOPBACK_IPV6_ENABLED); i++)
{
ip_ptr -> nx_ipv6_address[i].nxd_ipv6_address_index = (UCHAR)i;
}
/* 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;
/* Initializes 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].nx_ipv6_rtr_solicitation_max = NX_ICMPV6_MAX_RTR_SOLICITATIONS;
ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_count = ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_max;
ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_interval = NX_ICMPV6_RTR_SOLICITATION_INTERVAL;
ip_ptr -> nx_ip_interface[i].nx_ipv6_rtr_solicitation_timer = NX_ICMPV6_RTR_SOLICITATION_DELAY;
/* Join all-node multicast group. */
_nx_ipv6_multicast_join(ip_ptr, address, &ip_ptr -> nx_ip_interface[i]);
}
}
#endif /* NX_DISABLE_ICMPV6_ROUTER_SOLICITATION */
/* Start a faster periodic timer for IPv6 .*/
_nx_ip_fast_periodic_timer_create(ip_ptr);
#ifndef NX_DISABLE_LOOPBACK_INTERFACE
/* Setup loop back address. */
/* Page 9, section 2.5.3, RFC 4291. */
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address[0] = 0x0;
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address[1] = 0x0;
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address[2] = 0x0;
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address[3] = 0x1;
/* Config loop bcak address. */
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address_valid = NX_TRUE;
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address_type = NX_IP_VERSION_V6;
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address_prefix_length = 128;
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address_next = NX_NULL;
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address_attached = &ip_ptr -> nx_ip_interface[NX_LOOPBACK_INTERFACE];
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address_ConfigurationMethod = NX_IPV6_ADDRESS_MANUAL_CONFIG;
ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX].nxd_ipv6_address_state = NX_IPV6_ADDR_STATE_VALID;
ip_ptr -> nx_ip_interface[NX_LOOPBACK_INTERFACE].nxd_interface_ipv6_address_list_head = &ip_ptr -> nx_ipv6_address[NX_LOOPBACK_IPV6_SOURCE_INDEX];
#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 */
}