December 2000
Intermediate to advanced
784 pages
20h 54m
English
Content preview from Network Programming with Perl
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Sending and Receiving Broadcasts
Broadcasting a message is simply a matter of sending a UDP message to the broadcast address for your subnet. A simple way to see broadcasts in action is to use the ping program to send an ICMP ping request to the broadcast address. The following example illustrates what happened when I pinged the broadcast address for my office's 143.48.31.0/24 network:
% ping 143.48.31.255 PING 143.48.31.255 (143.48.31.255): 56 data bytes 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=4.9 ms 64 bytes from 143.48.31.46: icmp_seq=0 ttl=255 time=5.4 ms (DUP!) 64 bytes from 143.48.31.52: icmp_seq=0 ttl=255 time=5.9 ms (DUP!) 64 bytes from 143.48.31.47: icmp_seq=0 ttl=255 time=6.4 ms (DUP!) 64 bytes from 143.48.31.48: icmp_seq=0 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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