Hi Monks, I am now studying Net::DHCP::Packet by runing an example script copied from the module's document. but I find that all the DHCP packets sent by this script with the source IP address of my machine, but this address is supposed to be 0.0.0.0. I added a line which specifies the LocalAddr into it but the result was same. I looked into the source, and find out the problem may be is in IO::Socket::INET. But even after I explicitly assigned 0.0.0.0 to LocalAddr, the result doesn't change at all. Could any one help me on this? Thanks a lot Below is the code: 
#!/usr/bin/perl
  # Simple DHCP client - sending a broadcasted DHCP Discover request
  
  use IO::Socket::INET;
  use Net::DHCP::Packet;
  use Net::DHCP::Constants;
  
  # creat DHCP Packet
  $discover = Net::DHCP::Packet->new(
         xid => int(rand(0xFFFFFFFF)), # random xid
         Flags => 0x8000,              # ask for broadcast answer
         DHO_DHCP_MESSAGE_TYPE() => DHCPDISCOVER()
         );
  
  # send packet
  $handle = IO::Socket::INET->new(Proto => 'udp',
         Broadcast => 1,
         PeerPort => '67',
         LocalPort => '68',
         LocalAddr => '0.0.0.0',       # I added this line
         PeerAddr => '255.255.255.255')
      or die "socket: $@";     # yes, it uses $@ here
  $handle->send($discover->serialize())
      or die "Error sending broadcast inform:$!\n";

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In reply to how can I set LocalAddr to INADDR_ANY in IO::Socket::INET by phio

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