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netx/samples/demo_netx_ppp.c
PProvost e0f67c0550 Initial commit
2020-05-11 08:51:44 -06:00

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/* This is a small demo of the high-performance NetX TCP/IP stack using PPP.
This demo concentrates on UDP packet sending and receiving using PPP on a
simulated serial link. */
#include "tx_api.h"
#include "nx_api.h"
#include "nx_ppp.h"
/* Define demo stack size. */
#define DEMO_STACK_SIZE 2048
#define DEMO_DATA "ABCDEFGHIJKLMNOPQRSTUVWXYZ "
/* Define the ThreadX and NetX object control blocks... */
TX_THREAD thread_0;
TX_THREAD thread_1;
NX_PACKET_POOL pool_0;
NX_IP ip_0;
NX_IP ip_1;
NX_PPP ppp_0;
NX_PPP ppp_1;
NX_UDP_SOCKET socket_0;
NX_UDP_SOCKET socket_1;
/* Define the counters used in the demo application... */
ULONG thread_0_counter;
ULONG thread_1_counter;
ULONG ppp_0_link_up_counter;
ULONG ppp_0_link_down_counter;
ULONG ppp_1_link_up_counter;
ULONG ppp_1_link_down_counter;
ULONG error_counter;
/* Define thread prototypes. */
void thread_0_entry(ULONG thread_input);
void thread_1_entry(ULONG thread_input);
void ppp_0_serial_byte_output(UCHAR byte);
void ppp_1_serial_byte_output(UCHAR byte);
void invalid_packet_handler(NX_PACKET *packet_ptr);
void link_up_callback(NX_PPP *ppp_ptr);
void link_down_callback(NX_PPP *ppp_ptr);
UINT generate_login(CHAR *name, CHAR *password);
UINT verify_login(CHAR *name, CHAR *password);
/* Define main entry point. */
int main()
{
/* Enter the ThreadX kernel. */
tx_kernel_enter();
}
/* Define what the initial system looks like. */
void tx_application_define(void *first_unused_memory)
{
CHAR *pointer;
UINT status;
/* Setup the working pointer. */
pointer = (CHAR *) first_unused_memory;
/* Create the main thread. */
tx_thread_create(&thread_0, "thread 0", thread_0_entry, 0,
pointer, DEMO_STACK_SIZE,
5, 5, TX_NO_TIME_SLICE, TX_AUTO_START);
pointer = pointer + DEMO_STACK_SIZE;
/* . */
tx_thread_create(&thread_1, "thread 1", thread_1_entry, 0,
pointer, DEMO_STACK_SIZE,
5, 5, 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", 128, pointer, 2048);
pointer = pointer + 2048;
/* Check for pool creation error. */
if (status)
error_counter++;
/* Create the first PPP instance. */
status = nx_ppp_create(&ppp_0, "NetX PPP Instance 0", &ip_0, pointer, 2048, 1, &pool_0, invalid_packet_handler, ppp_0_serial_byte_output);
pointer = pointer + 2048;
/* Check for PPP create error. */
if (status)
error_counter++;
/* Define IP address. This PPP instance is effectively the server since it has both IP addresses. */
status = nx_ppp_ip_address_assign(&ppp_0, IP_ADDRESS(1, 2, 3, 4), IP_ADDRESS(1, 2, 3, 5));
/* Check for PPP IP address assign error. */
if (status)
error_counter++;
/* Register the link up/down callbacks. */
status = nx_ppp_link_up_notify(&ppp_0, link_up_callback);
status += nx_ppp_link_down_notify(&ppp_0, link_down_callback);
/* Check for PPP link up/down callback registration error(s). */
if (status)
error_counter++;
/* Setup PAP, this PPP instance is effectively the server since it will verify the name and password. */
status = nx_ppp_pap_enable(&ppp_0, NX_NULL, verify_login);
/* Check for PPP PAP enable error. */
if (status)
error_counter++;
/* Create an IP instance. */
status = nx_ip_create(&ip_0, "NetX IP Instance 0", IP_ADDRESS(0, 0, 0, 0), 0xFFFFF000UL, &pool_0, nx_ppp_driver,
pointer, 2048, 1);
pointer = pointer + 2048;
/* Create the next PPP instance. */
status = nx_ppp_create(&ppp_1, "NetX PPP Instance 1", &ip_1, pointer, 2048, 1, &pool_0, invalid_packet_handler, ppp_1_serial_byte_output);
pointer = pointer + 2048;
/* Check for PPP create error. */
if (status)
error_counter++;
/* Define IP address. This PPP instance is effectively the client since it doesn't have any IP addresses. */
status = nx_ppp_ip_address_assign(&ppp_1, IP_ADDRESS(0, 0, 0, 0), IP_ADDRESS(0, 0, 0, 0));
/* Check for PPP IP address assign error. */
if (status)
error_counter++;
/* Register the link up/down callbacks. */
status = nx_ppp_link_up_notify(&ppp_1, link_up_callback);
status += nx_ppp_link_down_notify(&ppp_1, link_down_callback);
/* Check for PPP link up/down callback registration error(s). */
if (status)
error_counter++;
/* Setup PAP, this PPP instance is effectively the since it generates the name and password for the peer. */
status = nx_ppp_pap_enable(&ppp_1, generate_login, NX_NULL);
/* Check for PPP PAP enable error. */
if (status)
error_counter++;
/* Create another IP instance. */
status += nx_ip_create(&ip_1, "NetX IP Instance 1", IP_ADDRESS(0, 0, 0, 0), 0xFFFFF000UL, &pool_0, nx_ppp_driver,
pointer, 2048, 1);
pointer = pointer + 2048;
/* Enable UDP traffic. */
status = nx_udp_enable(&ip_0);
status += nx_udp_enable(&ip_1);
/* Check for UDP enable errors. */
if (status)
error_counter++;
}
/* Define the test threads. */
void thread_0_entry(ULONG thread_input)
{
UINT status;
ULONG ip_status;
NX_PACKET *my_packet;
NX_PARAMETER_NOT_USED(thread_input);
do
{
/* Wait for the link to come up. */
status = nx_ip_status_check(&ip_0, NX_IP_LINK_ENABLED, &ip_status, 3 * NX_IP_PERIODIC_RATE);
} while (status);
/* Create a UDP socket. */
status = nx_udp_socket_create(&ip_0, &socket_0, "Socket 0", NX_IP_NORMAL, NX_FRAGMENT_OKAY, 0x80, 5);
/* Check status. */
if (status)
{
error_counter++;
return;
}
/* Bind the UDP socket to the IP port. */
status = nx_udp_socket_bind(&socket_0, 0x88, TX_WAIT_FOREVER);
/* Check status. */
if (status)
{
error_counter++;
return;
}
/* Disable checksum logic for this socket. */
nx_udp_socket_checksum_disable(&socket_0);
/* Let receiver thread run. */
tx_thread_relinquish();
while(1)
{
/* Allocate a packet. */
status = nx_packet_allocate(&pool_0, &my_packet, NX_UDP_PACKET, TX_WAIT_FOREVER);
/* Check status. */
if (status != NX_SUCCESS)
break;
/* Write ABCs into the packet payload! */
nx_packet_data_append(my_packet, DEMO_DATA, sizeof(DEMO_DATA), &pool_0, TX_WAIT_FOREVER);
/* Send the UDP packet. */
status = nx_udp_socket_send(&socket_0, my_packet, IP_ADDRESS(1, 2, 3, 5), 0x89);
/* Check status. */
if (status != NX_SUCCESS)
{
error_counter++;
break;
}
/* Increment thread 0's counter. */
thread_0_counter++;
/* Relinquish to thread 1. */
tx_thread_relinquish();
}
}
void thread_1_entry(ULONG thread_input)
{
UINT status;
ULONG ip_status;
NX_PACKET *my_packet;
NX_PARAMETER_NOT_USED(thread_input);
do
{
/* Wait for the link to come up. */
status = nx_ip_status_check(&ip_1, NX_IP_LINK_ENABLED, &ip_status, 3 * NX_IP_PERIODIC_RATE);
} while (status);
/* Create a UDP socket. */
status = nx_udp_socket_create(&ip_1, &socket_1, "Socket 1", NX_IP_NORMAL, NX_FRAGMENT_OKAY, 0x80, 5);
/* Check status. */
if (status)
{
error_counter++;
return;
}
/* Bind the UDP socket to the IP port. */
status = nx_udp_socket_bind(&socket_1, 0x89, TX_WAIT_FOREVER);
/* Check status. */
if (status)
{
error_counter++;
return;
}
while(1)
{
/* Receive a UDP packet. */
status = nx_udp_socket_receive(&socket_1, &my_packet, TX_WAIT_FOREVER);
/* Check status. */
if (status != NX_SUCCESS)
break;
/* Release the packet. */
status = nx_packet_release(my_packet);
/* Check status. */
if (status != NX_SUCCESS)
break;
/* Increment thread 1's counter. */
thread_1_counter++;
}
}
/* Define serial output routines. Normally these routines would
map to physical UART routines and the nx_ppp_byte_receive call
would be made from a UART receive interrupt. */
void ppp_0_serial_byte_output(UCHAR byte)
{
/* Just feed the PPP 1 input routine. */
nx_ppp_byte_receive(&ppp_1, byte);
}
void ppp_1_serial_byte_output(UCHAR byte)
{
/* Just feed the PPP 0 input routine. */
nx_ppp_byte_receive(&ppp_0, byte);
}
void invalid_packet_handler(NX_PACKET *packet_ptr)
{
/* Print out the non-PPP byte. In Windows, the string "CLIENT" will
be sent before Windows PPP starts. Once CLIENT is received, we need
to send "CLIENTSERVER" to establish communication. It's also possible
to receive modem commands here that might need some response to
continue. */
nx_packet_release(packet_ptr);
}
void link_up_callback(NX_PPP *ppp_ptr)
{
/* Just increment the link up counter. */
if (ppp_ptr == &ppp_0)
ppp_0_link_up_counter++;
else
ppp_1_link_up_counter++;
}
void link_down_callback(NX_PPP *ppp_ptr)
{
/* Just increment the link down counter. */
if (ppp_ptr == &ppp_0)
ppp_0_link_down_counter++;
else
ppp_1_link_down_counter++;
/* Restart the PPP instance. */
nx_ppp_restart(ppp_ptr);
}
UINT generate_login(CHAR *name, CHAR *password)
{
/* Make a name and password, called "myname" and "mypassword". */
name[0] = 'm';
name[1] = 'y';
name[2] = 'n';
name[3] = 'a';
name[4] = 'm';
name[5] = 'e';
name[6] = (CHAR) 0;
password[0] = 'm';
password[1] = 'y';
password[2] = 'p';
password[3] = 'a';
password[4] = 's';
password[5] = 's';
password[6] = 'w';
password[7] = 'o';
password[8] = 'r';
password[9] = 'd';
password[10] = (CHAR) 0;
return(NX_SUCCESS);
}
UINT verify_login(CHAR *name, CHAR *password)
{
if ((name[0] == 'm') &&
(name[1] == 'y') &&
(name[2] == 'n') &&
(name[3] == 'a') &&
(name[4] == 'm') &&
(name[5] == 'e') &&
(name[6] == (CHAR) 0) &&
(password[0] == 'm') &&
(password[1] == 'y') &&
(password[2] == 'p') &&
(password[3] == 'a') &&
(password[4] == 's') &&
(password[5] == 's') &&
(password[6] == 'w') &&
(password[7] == 'o') &&
(password[8] == 'r') &&
(password[9] == 'd') &&
(password[10] == (CHAR) 0))
return(NX_SUCCESS);
else
return(NX_PPP_ERROR);
}
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