problems using magic "<broadcast>" socket address on different platforms

[Cecil H. Whitley]

Hi,
The broadcast address is dependant upon the ip address and subnet mask.
255.255.255.255 is a generalization much like 0.0.0.0 for "default gateway".
If I remember correctly you can calculate it using
network addr xor (subnet mask xor 255.255.255.255)
example:
192.168.1.0 (network addr)
subnet mask 255.255.255.0 (standard class c)
yields
192.168.1.0 xor (255.255.255.0 xor 255.255.255.255)
yields
192.168.1.0 xor 0.0.0.255
yields
192.168.1.255 which is the proper broadcast address.

Regards,
Cecil