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/***************************************************************************/
/* Copyright (c) 2024 Microsoft Corporation */
/* Copyright (c) 2026 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 */
/***************************************************************************/
/* This NetX test concentrates on ICMP Time Exceeded Message for IP fragmentation. */
/* Requirement: __PRODUCT_NETXDUO__ is defined, NX_DISABLE_ICMPV4_ERROR_MESSAGE is not defined. NX_DISABLE_FRAGMENTATION is not defined. */
/* Test sequence:
* 1. ip_0 send ICMP Ping with 600 bytes to ip_2. It is fragmented into three packets.
* 2. Delay 5 seconds for second fragmentation packet of ip_0 to update the timeout of fragmentation to let ip_1 fragmentation timeout first.
* 3. Delay NX_IP_TIME_TO_LIVE + 4 seconds for third fragmentation of ip_0, send the third fragmentation before ip_0 fragmentation timeout, after ip_1 fragmentation timeout.
* 4. ip_1 send ICMP Ping with 600 bytes to ip_2. It is fragmented into three packets.
* 5. Discard the third fragmentation packet of ip_1 to let ip_1 fragmentation timeout.
* 6. Check if ip_1 instance get the fragmentation time exceeded message from ip_2 instance.
* 7. Check if ip_1 instance get the response from ip_2 instance.
* 7. Check if ip_0 instance get the response from ip_2 instance.
*/
#include "tx_api.h"
#include "nx_api.h"
#include "nx_icmp.h"
#include "nx_system.h"
#include "nx_ram_network_driver_test_1500.h"
extern void test_control_return(UINT status);
#if defined (__PRODUCT_NETXDUO__) && !defined (NX_DISABLE_ICMPV4_ERROR_MESSAGE) && !defined (NX_DISABLE_FRAGMENTATION) && !defined(NX_DISABLE_IPV4)
#define DEMO_STACK_SIZE 2048
/* Define the ThreadX and NetX object control blocks... */
static TX_THREAD thread_0;
static TX_THREAD thread_1;
static NX_PACKET_POOL pool_0;
static NX_IP ip_0;
static NX_IP ip_1;
static NX_IP ip_2;
/* Define the counters used in the demo application... */
static ULONG error_counter;
static ULONG ip_0_packet_counter;
static ULONG ip_1_packet_counter;
static UCHAR time_exceeded_message;
static UCHAR icmp_ping_timeout;
static UCHAR icmp_ping_received;
static CHAR msg[600];
/* Define thread prototypes. */
static void thread_0_entry(ULONG thread_input);
static void thread_1_entry(ULONG thread_input);
extern void _nx_ram_network_driver_256(struct NX_IP_DRIVER_STRUCT *driver_req);
extern UINT (*advanced_packet_process_callback)(NX_IP *ip_ptr, NX_PACKET *packet_ptr, UINT *operation_ptr, UINT *delay_ptr);
static UINT my_packet_process(NX_IP *ip_ptr, NX_PACKET *packet_ptr, UINT *operation_ptr, UINT *delay_ptr);
/* Define what the initial system looks like. */
#ifdef CTEST
VOID test_application_define(void *first_unused_memory)
#else
void netx_ip_fragmentation_time_exceeded_message_test_application_define(void *first_unused_memory)
#endif
{
CHAR *pointer;
UINT status;
/* Setup the working pointer. */
pointer = (CHAR *) first_unused_memory;
error_counter = 0;
ip_0_packet_counter = 0;
ip_1_packet_counter = 0;
time_exceeded_message = NX_FALSE;
icmp_ping_received = NX_FALSE;
icmp_ping_timeout = NX_FALSE;
memset(msg, '1', sizeof(msg));
/* Create the main thread. */
tx_thread_create(&thread_0, "thread 0", thread_0_entry, 0,
pointer, DEMO_STACK_SIZE,
4, 4, TX_NO_TIME_SLICE, TX_AUTO_START);
pointer = pointer + DEMO_STACK_SIZE;
/* Create the main thread. */
tx_thread_create(&thread_1, "thread 1", thread_1_entry, 0,
pointer, DEMO_STACK_SIZE,
4, 4, TX_NO_TIME_SLICE, TX_AUTO_START);
pointer = pointer + DEMO_STACK_SIZE;
/* Initialize the NetX system. */
nx_system_initialize();
/* Create a packet pool. */
status = nx_packet_pool_create(&pool_0, "NetX Main Packet Pool", 1536, pointer, 1536*20);
pointer = pointer + 1536*20;
/* Check for pool creation error. */
if (status)
error_counter++;
/* Create an IP instance. */
status = nx_ip_create(&ip_0, "NetX IP Instance 0", IP_ADDRESS(1, 2, 3, 4), 0xFFFFF000UL, &pool_0, _nx_ram_network_driver_256,
pointer, 2048, 1);
pointer = pointer + 2048;
/* Create another IP instance. */
status += nx_ip_create(&ip_1, "NetX IP Instance 1", IP_ADDRESS(1, 2, 3, 5), 0xFFFFF000UL, &pool_0, _nx_ram_network_driver_256,
pointer, 2048, 1);
pointer = pointer + 2048;
/* Check for IP create errors. */
if (status)
error_counter++;
/* Create another IP instance. */
status += nx_ip_create(&ip_2, "NetX IP Instance 2", IP_ADDRESS(1, 2, 3, 6), 0xFFFFF000UL, &pool_0, _nx_ram_network_driver_256,
pointer, 2048, 1);
pointer = pointer + 2048;
/* Check for IP create errors. */
if (status)
error_counter++;
/* Enable ARP and supply ARP cache memory for IP Instance 0. */
status = nx_arp_enable(&ip_0, (void *) pointer, 1024);
pointer = pointer + 1024;
/* Enable ARP and supply ARP cache memory for IP Instance 1. */
status += nx_arp_enable(&ip_1, (void *) pointer, 1024);
pointer = pointer + 1024;
/* Enable ARP and supply ARP cache memory for IP Instance 1. */
status += nx_arp_enable(&ip_2, (void *) pointer, 1024);
pointer = pointer + 1024;
/* Check for ARP enable errors. */
if (status)
error_counter++;
/* Enable ICMP traffic. */
status = nx_icmp_enable(&ip_0);
status += nx_icmp_enable(&ip_1);
status += nx_icmp_enable(&ip_2);
/* Check for ICMP enable errors. */
if (status)
error_counter++;
/* Enable IP fragmentation logic on both IP instances. */
status = nx_ip_fragment_enable(&ip_0);
status += nx_ip_fragment_enable(&ip_1);
status += nx_ip_fragment_enable(&ip_2);
/* Check for IP fragment enable errors. */
if (status)
error_counter++;
}
/* Define the test threads. */
static void thread_0_entry(ULONG thread_input)
{
UINT status;
NX_PACKET *my_packet;
/* Print out some test information banners. */
printf("NetX Test: IP Fragmentation Time Exceeded Message Test...............");
/* Set the callback function. */
advanced_packet_process_callback = my_packet_process;
/* Ping an IP address that does exist. Set the timeout as NX_IP_TIME_TO_LIVE + 1 + 5. delay the second fragmentation. */
status = nx_icmp_ping(&ip_0, IP_ADDRESS(1, 2, 3, 6), msg, 600, &my_packet, (NX_IP_TIME_TO_LIVE + 1 + 5) * NX_IP_PERIODIC_RATE);
/* Check the status. */
if (status == NX_SUCCESS)
{
/* Update the flag. */
icmp_ping_received = NX_TRUE;
/* Release the packet. */
nx_packet_release(my_packet);
}
/* Check status. */
if ((error_counter) || (time_exceeded_message != NX_TRUE) ||
(icmp_ping_timeout != NX_TRUE) || (icmp_ping_received != NX_TRUE))
{
printf("ERROR!\n");
test_control_return(1);
}
else
{
printf("SUCCESS!\n");
test_control_return(0);
}
}
/* Define the test threads. */
static void thread_1_entry(ULONG thread_input)
{
UINT status;
NX_PACKET *my_packet;
/* Ping an IP address that does exist. Set the timeout as NX_IP_TIME_TO_LIVE + 1. */
status = nx_icmp_ping(&ip_1, IP_ADDRESS(1, 2, 3, 6), msg, 600, &my_packet, (NX_IP_TIME_TO_LIVE + 1) * NX_IP_PERIODIC_RATE);
/* Check the status, should not get the response. */
if (status == NX_NO_RESPONSE)
{
icmp_ping_timeout = NX_TRUE;
}
}
static UINT my_packet_process(NX_IP *ip_ptr, NX_PACKET *packet_ptr, UINT *operation_ptr, UINT *delay_ptr)
{
NX_ICMPV4_ERROR *icmpv4_error;
/* Return if it is not an IP packet. */
if (packet_ptr -> nx_packet_length <= 28)
return NX_TRUE;
/* Check the IP instance. */
if (ip_ptr == &ip_0)
{
/* Update the fragmentation packet counter. */
ip_0_packet_counter ++;
/* Delay the second fragmentation packet. */
if (ip_0_packet_counter == 2)
{
/* Set the discard operation. */
*operation_ptr = NX_RAMDRIVER_OP_DELAY;
/* Delay the second fragmentation ping, the timeout of ip_0 fragmentation should be updated. . */
*delay_ptr = 5 * NX_IP_PERIODIC_RATE;
}
/* Delay the second fragmentation packet. */
if (ip_0_packet_counter == 3)
{
/* Set the discard operation. */
*operation_ptr = NX_RAMDRIVER_OP_DELAY;
/* Delay the third fragmentation ping, send the third fragmentation ping after ip_1 fragmentation timeout, before ip_0 fragmentation timeout. */
*delay_ptr = (NX_IP_TIME_TO_LIVE + 4) * NX_IP_PERIODIC_RATE;
}
}
/* Check the IP instance. */
else if (ip_ptr == &ip_1)
{
/* Update the fragmentation packet counter. */
ip_1_packet_counter ++;
/* Discard the third fragmentation packet. */
if (ip_1_packet_counter == 3)
{
/* Set the discard operation. */
*operation_ptr = NX_RAMDRIVER_OP_DROP;
}
}
else
{
/* Set the ICMP Error Message header. */
icmpv4_error = (NX_ICMPV4_ERROR*)(packet_ptr -> nx_packet_prepend_ptr + 20);
/* Check if it is a fragmentation time exceeded message. */
if ((icmpv4_error -> nx_icmpv4_error_header.nx_icmpv4_header_type == NX_ICMP_TIME_EXCEEDED_TYPE) &&
(icmpv4_error -> nx_icmpv4_error_header.nx_icmpv4_header_code == NX_ICMP_FRT_EXCEEDED_CODE))
time_exceeded_message = NX_TRUE;
}
return NX_TRUE;
}
#else
#ifdef CTEST
VOID test_application_define(void *first_unused_memory)
#else
void netx_ip_fragmentation_time_exceeded_message_test_application_define(void *first_unused_memory)
#endif
{
printf("NetX Test: IP Fragmentation Time Exceeded Message Test...............N/A\n");
test_control_return(3);
}
#endif /* NX_DISABLE_FRAGMENTATION */
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