Function udp_create

Plugins/UnLuaExtensions/LuaSocket/Source/src/udp.cpp:460–480

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

* Creates a master udp object
\*-------------------------------------------------------------------------*/
static int udp_create(lua_State *L, int family) {
    /* allocate udp object */
    p_udp udp = (p_udp) lua_newuserdata(L, sizeof(t_udp));
    auxiliar_setclass(L, "udp{unconnected}", -1);
    /* if family is AF_UNSPEC, we leave the socket invalid and
     * store AF_UNSPEC into family. This will allow it to later be
     * replaced with an AF_INET6 or AF_INET socket upon first use. */
    udp->sock = SOCKET_INVALID;
    timeout_init(&udp->tm, -1, -1);
    udp->family = family;
    if (family != AF_UNSPEC) {
        const char *err = inet_trycreate(&udp->sock, family, SOCK_DGRAM, 0);
        if (err != NULL) {
            lua_pushnil(L);
            lua_pushstring(L, err);
            return 2;
        }
        socket_setnonblocking(&udp->sock);
    }
    return 1;
}

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