Unix sockets with getaddrinfo() in C

Question

Does anyone know if it's possible to use getaddrinfo with unix sockets in C (AF_UNIX). I've tried a couple of things but I can't make it work. This is basically what I'm trying:

struct addrinfo hints, *res;

memset(&hints, 0, sizeof(hints));
hints.ai_family   = AF_UNIX;
hints.ai_socktype = SOCK_STREAM;
if(getaddrinfo("What should I put here?", "What should I put here?", &hints, &res) != 0){
    //do sth about
}

My question is how to fill the node and service fields, in case that is possible to use it with unix sockets.
Thanks in advance.

Answer 1

Some implementations of getaddrinfo() have supported AF_UNIX socket addresses, but they no longer do so due to security concerns.

You don't really need a function to "look up" an AF_UNIX address anyway - if you know the socket path, then you can just copy it straight into a sockaddr_un of sufficient size. There's no resolution step for AF_UNIX addresses - the socket name is the socket address.