I'm trying to ping the broadcast address 255.255.255.255 on WinXP SP3.
If I use the command line, I get host error:
C:\>ping 255.255.255.255
Ping request could not find host 255.255.255.255. Please check the name and try again.
If I try a C++ program using the iphlpapi, IcmpSendEcho() fails and GetLastError returns 11010 IP_REQ_TIMED_OUT.
HANDLE h = ::IcmpCreateFile();
IPAddr broadcast = inet_addr( "255.255.255.255" );
BYTE payload[ 32 ] = { 0 };
IP_OPTION_INFORMATION option = { 255, 0, 0, 0, 0 };
// a buffer with room for 32 replies each containing the full payload
std::vector< BYTE > replies( 32 * ( sizeof( ICMP_ECHO_REPLY ) + 32 ) );
DWORD res = ::IcmpSendEcho( h,
broadcast,
payload,
sizeof( payload ),
&option,
&replies[ 0 ],
replies.size(),
1000 );
::IcmpCloseHandle( h );
I can ping the local broadcast 192.168.0.255 with no problem.
What do I need to do to ping the global broadcast?
Thanks,
PaulH
