Prog to implement the csma CD in c language?

Answer 1

#include<stdio.h>

#include<stdlib.h>

#include<signal.h>

#include<sys/time.h>

int x=0;

void capture()

{

exit(0);

}

int get()

{

return x;

}

void put()

{

x++;

}

void node(char *p)

{

int name;

int seq1,seq2,i=0;

long t;

struct timeval tv;

struct timezone tz;

name=atoi(p);

while(1)

{

seq1=get();

seq2=get();

if(seq1==seq2)

{

put();

seq1=get();

gettimeofday(&tv,&tz);

printf("station %d transmitting frame %d at %ld \n",name,++i,tv,tz);

usleep(10);

seq2=get();

if(seq1!=seq2)

{

printf("station %d collision occured %d \n",name,i--);

usleep(100);

}

else

{

printf("station %d transmission of frame %d success \n",name,i);

}

}

usleep(200);

}

}

main()

{

pthread_t t1,t2,t3;

signal(SIGINT,capture);

pthread_create(&t1,0,(void *)node,"1");

pthread_create(&t2,0,(void *)node,"2");

pthread_create(&t3,0,(void *)node,"3");

while(1);

}