Go

Currently running this bitch on a server with 24 processors clocked at 2.6Ghz, 16GB of ram and fiber connection. Currently pinging about 300-400 IP addresses/second. And the glue holding this bitch together is Go. Look at that simple concurrency model and message passing, it's a thing of fucking beauty. Now to get this running on the other 4 servers just like it.

http://pastebin.com/rqEvpszX
Currently running at: 177 valid IPs/second, 582 IPs/second

And I know that the last part is a little hacky and that the IP functions should be moved to their own source file. Bite me.

Why aren't you using Go /prog/?

>>45
Yes it does. It ensures that the memory is actually written to.
union {
    char c;
    unsigned char u;
} u;
volatile union {
    char c;
    unsigned char u;
} vu;
u.c = 10; /* may be stored in a register or optimized away */
printf("%u", (unsigned)u.u); /* accessing u.u is undefined behavior */
vu.c = 10; /* must be written to memory */
printf("%u", (unsigned)vu.u); /* vu.u is guaranteed to contain 10 */