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wanpipe/api/aft/aft_integrity.c

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/*****************************************************************************
* chdlc_api.c CHDLC API: Receive Module
*
* Author(s): Gideon Hack & Nenad Corbic <ncorbic@sangoma.com>
*
* Copyright: (c) 1995-2001 Sangoma Technologies Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
* ============================================================================
* Description:
*
* The chdlc_api.c utility will bind to a socket to a chdlc network
* interface, and continously tx and rx packets to an from the sockets.
*
* This example has been written for a single interface in mind,
* where the same process handles tx and rx data.
*
* A real world example, should use different processes to handle
* tx and rx spearately.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/if_wanpipe.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/wanpipe.h>
#include <linux/sdla_aft_te1.h>
#include "lib_api.h"
#define FALSE 0
#define TRUE 1
#define LGTH_CRC_BYTES 0
#define MAX_TX_DATA 5000 /* Size of tx data */
#define MAX_RX_DATA MAX_TX_DATA
#define SOCK_TIMEOUT 1
/*===================================================
* Golobal data
*==================================================*/
unsigned char HDLC_streaming = FALSE;
unsigned short Rx_lgth;
unsigned char Rx_data[MAX_RX_DATA];
unsigned char Tx_data[MAX_TX_DATA];
int sock;
/*===================================================
* Function Prototypes
*==================================================*/
int MakeConnection(void);
void handle_socket( void);
static unsigned char test_data[]={0x00,0x5A, 0xAA, 0xA5, 0xFF};
static unsigned char tx_index=0;
/*===================================================
* MakeConnection
*
* o Create a Socket
* o Bind a socket to a wanpipe network interface
* (Interface name is supplied by the user)
*==================================================*/
int MakeConnection(void)
{
struct wan_sockaddr_ll sa;
memset(&sa,0,sizeof(struct wan_sockaddr_ll));
errno = 0;
sock = socket(AF_WANPIPE, SOCK_RAW, 0);
if( sock < 0 ) {
perror("Socket");
return(FALSE);
} /* if */
printf("\nConnecting to router %s, interface %s\n", card_name, if_name);
strcpy( (char*)sa.sll_device, if_name);
strcpy( (char*)sa.sll_card, card_name);
sa.sll_protocol = htons(PVC_PROT);
sa.sll_family=AF_WANPIPE;
if(bind(sock, (struct sockaddr *)&sa, sizeof(struct wan_sockaddr_ll)) < 0){
perror("bind");
printf("Failed to bind a socket to %s interface\n",if_name);
exit(0);
}
printf("Socket bound to %s\n\n",if_name);
return(TRUE);
}
void init_tx_pattern(void)
{
api_tx_element_t * api_tx_el;
unsigned char *data;
int i;
memset(&Tx_data[0],0,MAX_TX_DATA);
/* Initialize the tx packet. The 16 byte header must
* be inserted before tx data. In CHDLC protocol,
* the tx x25 header is not used, thus it can be
* set to zero */
api_tx_el = (api_tx_element_t*)&Tx_data[0];
data = (unsigned char *)api_tx_el->data;
for (i=0;i<tx_size;i++){
data[i] = test_data[tx_index];
tx_index++;
if (tx_index >= sizeof(test_data)){
tx_index=0;
}
}
}
/*===========================================================
* handle_socket
*
* o Tx/Rx data to and from the socket
* o Cast received data to an api_rx_element_t data type
* o The received packet contains 16 bytes header
*
* ------------------------------------------
* | 16 bytes | X bytes ...
* ------------------------------------------
* Header Data
*
* RX DATA:
* --------
* Each rx data packet contains the 16 byte header!
*
* o Rx 16 byte data structure:
*
* typedef struct {
* unsigned char error_flag PACKED;
* unsigned short time_stamp PACKED;
* unsigned char reserved[13] PACKED;
* } api_rx_hdr_t;
*
* typedef struct {
* api_rx_hdr_t api_rx_hdr PACKED;
* void * data PACKED;
* } api_rx_element_t;
*
* error_flag:
* bit 0: incoming frame was aborted
* bit 1: incoming frame has a CRC error
* bit 2: incoming frame has an overrun eror
*
* time_stamp:
* absolute time value in ms.
*
* TX_DATA:
* --------
* Each tx data packet MUST contain a 16 byte header!
*
* o Tx 16 byte data structure
*
* typedef struct {
* unsigned char attr PACKED;
* unsigned char reserved[15] PACKED;
* } api_tx_hdr_t;
*
* typedef struct {
* api_tx_hdr_t api_tx_hdr PACKED;
* void * data PACKED;
* } api_tx_element_t;
*
* Currently the chdlc device driver doesn't use any of
* the above fields. Thus, the user can set the 16 bytes
* to ZERO.
*
*/
void handle_socket(void)
{
unsigned int Rx_count,Tx_count,Tx_length;
api_rx_element_t* api_rx_el;
api_tx_element_t * api_tx_el;
fd_set ready,write,oob;
int err,i;
int no_CRC_bytes_Rx = LGTH_CRC_BYTES;
struct timeval tv;
tv.tv_usec = 0;
tv.tv_sec = SOCK_TIMEOUT;
Rx_count = 0;
Tx_count = 0;
Tx_length = tx_size;
printf("\n\nSocket Handler: Rx=%d Tx=%i TxCnt=%i TxLen=%i TxDelay=%i RxCnt=%i\n",
read_enable,write_enable,tx_cnt,tx_size,tx_delay,rx_cnt);
/* If running HDLC_STREAMING then the received CRC bytes
* will be passed to the application as part of the
* received data.
*/
api_tx_el = (api_tx_element_t*)&Tx_data[0];
memset(&Tx_data[0],0,MAX_TX_DATA);
init_tx_pattern();
while (1) {
err = ioctl(sock,SIOC_WANPIPE_SOCK_STATE,0);
printf("Interface %s state is %s (%d)\n",
if_name,
(err == 0) ? "CONNECTED" :
(err == 1) ? "DISCONNECTED" :
"CONNECTING",err);
if (err < 0) {
printf("Error interface down %s sock disconnected! (%s)\n",
if_name,strerror(errno));
return;
}
if (err > 0) {
printf("Waiting for interface %s to come up!\n",if_name);
sleep(10);
} else {
break;
}
}
for(;;) {
FD_ZERO(&ready);
FD_ZERO(&write);
FD_ZERO(&oob);
FD_SET(sock,&oob);
FD_SET(sock,&ready);
tv.tv_usec = 0;
tv.tv_sec = SOCK_TIMEOUT;
if (write_enable){
FD_SET(sock,&write);
}
fflush(stdout);
err= select(sock + 1,&ready, &write, &oob, &tv);
if (err < 0) {
printf("Error: inteface down: %s socket disconnected %s\n",
if_name,strerror(errno));
break;
} else if (err == 0) {
/* Timeout do someting if you like */
} else {
if (FD_ISSET(sock,&oob)){
err = recv(sock, Rx_data, MAX_RX_DATA, MSG_OOB);
if(err < 0 ) {
printf("Failed to receive OOB %i , %i\n", Rx_count, err);
err = ioctl(sock,SIOC_WANPIPE_SOCK_STATE,0);
printf("Sock state is %s\n",
(err == 0) ? "CONNECTED" :
(err == 1) ? "DISCONNECTED" :
"CONNECTING");
break;
}
printf("Got OOB exception: Link Down !\n");
break;
}
if (FD_ISSET(sock,&ready)){
err = recv(sock, Rx_data, MAX_RX_DATA, 0);
/* err indicates bytes received */
if (err > 0){
api_rx_el = (api_rx_element_t*)&Rx_data[0];
/* Check the packet length */
Rx_lgth = err - sizeof(api_rx_hdr_t)-no_CRC_bytes_Rx;
if(Rx_lgth<=0) {
printf("\nShort frame received (%d)\n",
Rx_lgth);
Rx_count++;
continue;
}
++Rx_count;
if (Rx_lgth != Tx_length){
printf("Rx Error cnt %i: Rx length %i not equal to %i\n",
Rx_count,Rx_lgth,Tx_length);
break;
}
for (i=0;i<Rx_lgth;i++){
if (((unsigned char*)api_rx_el->data)[i] !=
((unsigned char*)api_tx_el->data)[i]){
printf("Rx Error cnt=%i: Packet corruption on offset %i\n",
Rx_count,i);
break;
}
}
if (verbose) {
printf("Tx Len=%i Tx=%i Rx=%i : Data Ok\r",
Tx_length, Tx_count,Rx_count);
}
if (Rx_count == tx_cnt){
init_tx_pattern();
Rx_count=0;
write_enable=1;
}
} else {
printf("\nError receiving data\n");
break;
}
}
if (FD_ISSET(sock,&write)){
err = send(sock,Tx_data, Tx_length + sizeof(api_tx_hdr_t), 0);
if (err <= 0){
if (errno == EBUSY){
/* Socket busy try sending again !*/
}else{
/* Check socket state */
err = ioctl(sock,SIOC_WANPIPE_SOCK_STATE,0);
printf("Sock state is %s\n",
(err == 0) ? "CONNECTED" :
(err == 1) ? "DISCONNECTED" :
"CONNECTING");
printf("Failed to send %i \n",errno);
perror("Send: ");
break;
}
}else{
++Tx_count;
if (verbose && Rx_count < 1) {
printf("Tx Len=%i Tx=%i Rx=%i : Data Ok\r",
Tx_length, Tx_count,Rx_count);
}
}
}
if (tx_delay){
sleep(tx_delay);
}
if (tx_size && Tx_count == tx_cnt){
write_enable=0;
Tx_count=0;
}
}
}
close (sock);
}
/***************************************************************
* Main:
*
* o Make a socket connection to the driver.
* o Call handle_socket() to read/write the socket
*
**************************************************************/
int main(int argc, char* argv[])
{
int proceed;
proceed=init_args(argc,argv);
if (proceed != WAN_TRUE){
usage((unsigned char*)argv[0]);
return -1;
}
proceed = MakeConnection();
if(proceed == WAN_TRUE){
handle_socket();
return 0;
}
return 1;
};
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