title: Limiting ICMP echo replies when creating a PING program
body: <p>I was writing a multithreaded ping program. I created rawsockets on each thread (for each IP) and sent ICMP Echo Request to each using sendto() and then I did recvfrom() in each thread. I am getting messages from IPs in various sockets(like if I had used socket S1 for sendto for  IP1, I get echo-replies from IP1 to S1, S2 etc). Do I need to do a bind? </p>
  
  <p>Also another problem is that even though I send only 1 ICMP request I get back many echo replies from target. Is there any way I can limit this? This is causing me to miss some of the other ICMP packets. Is there a way for my program to ask the target to stop sending ICMP echo's? </p>
  
  <p>Thanks, </p>