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I prefer not doing a resolve. A quick hardcoded macro to 0x0100007F would work beautifully for IPv4, is there one for IPv6 too?
This is for the bind() BSD sockets structure sockaddr_in6 and sockaddr_in
man ipv6 is your friend 🙂
There is a
in6addr_loopbackvariable and for initializations a macroIN6ADDR_LOOPBACK_INIT.Be careful about the macro you want to do for IPv4, don’t forget that this is stored in network order, so the endianess of the system is an issue, here.