Function inet_tryconnect

engine/script/src/luasocket/inet.c:401–441

-------------------------------------------------------------------------*\ * Tries to connect to remote address (address, port) \*-------------------------------------------------------------------------*/

* Tries to connect to remote address (address, port)
\*-------------------------------------------------------------------------*/
const char *inet_tryconnect(p_socket ps, int *family, const char *address,
        const char *serv, p_timeout tm, struct addrinfo *connecthints)
{
    struct addrinfo *iterator = NULL, *resolved = NULL;
    const char *err = NULL;
    /* try resolving */
    err = socket_gaistrerror(getaddrinfo(address, serv,
                connecthints, &resolved));
    if (err != NULL) {
        if (resolved) freeaddrinfo(resolved);
        return err;
    }
    for (iterator = resolved; iterator; iterator = iterator->ai_next) {
        timeout_markstart(tm);
        /* create new socket if necessary. if there was no
         * bind, we need to create one for every new family
         * that shows up while iterating. if there was a
         * bind, all families will be the same and we will
         * not enter this branch. */
        if (*family != iterator->ai_family) {
            socket_destroy(ps);
            err = socket_strerror(socket_create(ps, iterator->ai_family,
                iterator->ai_socktype, iterator->ai_protocol));
            if (err != NULL) {
                freeaddrinfo(resolved);
                return err;
            }
            *family = iterator->ai_family;
            /* all sockets initially non-blocking */
            socket_setnonblocking(ps);
        }
        /* try connecting to remote address */
        err = socket_strerror(socket_connect(ps, (SA *) iterator->ai_addr,
            (socklen_t) iterator->ai_addrlen, tm));
        /* if success, break out of loop */
        if (err == NULL) break;
    }
    freeaddrinfo(resolved);
    /* here, if err is set, we failed */
    return err;
}

/*-------------------------------------------------------------------------*\
* Tries to accept a socket