Function opt_setmembership

Plugins/UnLuaExtensions/LuaSocket/Source/src/options.cpp:351–370

=========================================================================*\ * Auxiliar functions \*=========================================================================*/

* Auxiliar functions
\*=========================================================================*/
static int opt_setmembership(lua_State *L, p_socket ps, int level, int name)
{
    struct ip_mreq val;                   /* obj, name, table */
    if (!lua_istable(L, 3)) auxiliar_typeerror(L,3,lua_typename(L, LUA_TTABLE));
    lua_pushstring(L, "multiaddr");
    lua_gettable(L, 3);
    if (!lua_isstring(L, -1))
        luaL_argerror(L, 3, "string 'multiaddr' field expected");
    if (!inet_aton(lua_tostring(L, -1), &val.imr_multiaddr))
        luaL_argerror(L, 3, "invalid 'multiaddr' ip address");
    lua_pushstring(L, "interface");
    lua_gettable(L, 3);
    if (!lua_isstring(L, -1))
        luaL_argerror(L, 3, "string 'interface' field expected");
    val.imr_interface.s_addr = htonl(INADDR_ANY);
    if (strcmp(lua_tostring(L, -1), "*") &&
            !inet_aton(lua_tostring(L, -1), &val.imr_interface))
        luaL_argerror(L, 3, "invalid 'interface' ip address");
    return opt_set(L, ps, level, name, (char *) &val, sizeof(val));
}

static int opt_ip6_setmembership(lua_State *L, p_socket ps, int level, int name)
{