Function udp_create

engine/script/src/luasocket/udp.c:417–443

=========================================================================*\ * Library functions \*=========================================================================*/ -------------------------------------------------------------------------*\ * Creates a master udp object \*-------------------------------------------------------------------------*/

* Creates a master udp object
\*-------------------------------------------------------------------------*/
static int udp_create(lua_State *L, int family) {
    t_socket sock;
    const char *err = inet_trycreate(&sock, family, SOCK_DGRAM);
    /* try to allocate a system socket */
    if (!err) {
        /* allocate udp object */
        p_udp udp = (p_udp) lua_newuserdata(L, sizeof(t_udp));
        auxiliar_setclass(L, "udp{unconnected}", -1);
        /* initialize remaining structure fields */
        socket_setnonblocking(&sock);
#if !defined(DM_IPV6_UNSUPPORTED) && !defined(__EMSCRIPTEN__)
        if (family == PF_INET6) {
            int yes = 1;
            setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
                (void *)&yes, sizeof(yes));
        }
#endif // DM_IPV6_UNSUPPORTED
        udp->sock = sock;
        timeout_init(&udp->tm, -1, -1);
        udp->family = family;
        return 1;
    } else {
        lua_pushnil(L);
        lua_pushstring(L, err);
        return 2;
    }
}

static int global_create(lua_State *L) {
    return udp_create(L, AF_INET);