Hi everyone, I declared a buffer size of 4096, and in it stored a string of 20 chars. After that, i sent this packet as an ICMP packet using raw sockets. I am using the ICMP chk_sum function provided by the object utilities of the Stevens free code. to this function, you supply a pointer to the start of the packet, and the length of the packet. When i send this packet (with check sum put in), i use the sendto() fn. TO my surprise, i found (using tcpdump) that 3 packets (fragmants) were transmitted. When i changed the original buffer size to 128, only one packet was sent. Finally, when i changed the buffer size to 8192, 6 packets were sent. Can someone tell me what's going on? In all three cases, i sent the exact same data of 20 chars. The data is copied into icmp->icmp_data using strcpy() (which does add a '\0' to terminate the buffer) and use strlen() to calculate the length of the packet. Any suggestions are welcome. Sunny days, Aditya - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.rutgers.edu
