pack4
htonl(pack4(addr, 0));
htonl(pack4(addr, 0));
p32[0] = htonl(pack4(addr, 0));
p32[1] = htonl(pack4(addr, 4));
p32[2] = htonl(pack4(addr, 8));
p32[3] = htonl(pack4(addr, 12));