static isc_result_t
configure_listener(isc_sockaddr_t *address, ns_lwresd_t *lwresd,
isc_mem_t *mctx, ns_lwreslistenerlist_t *newlisteners)
{
ns_lwreslistener_t *listener, *oldlistener = NULL;
char socktext[ISC_SOCKADDR_FORMATSIZE];
isc_result_t result;
(void)find_listener(address, &oldlistener);
listener = NULL;
result = listener_create(mctx, lwresd, &listener);
if (result != ISC_R_SUCCESS) {
isc_sockaddr_format(address, socktext, sizeof(socktext));
isc_log_write(ns_g_lctx, ISC_LOGCATEGORY_GENERAL,
NS_LOGMODULE_LWRESD, ISC_LOG_WARNING,
"lwres failed to configure %s: %s",
socktext, isc_result_totext(result));
return (result);
}
/*
* If there's already a listener, don't rebind the socket.
*/
if (oldlistener == NULL) {
result = listener_bind(listener, address);
if (result != ISC_R_SUCCESS) {
ns_lwreslistener_detach(&listener);
return (ISC_R_SUCCESS);
}
} else
listener_copysock(oldlistener, listener);
result = listener_startclients(listener);
if (result != ISC_R_SUCCESS) {
isc_sockaddr_format(address, socktext, sizeof(socktext));
isc_log_write(ns_g_lctx, ISC_LOGCATEGORY_GENERAL,
NS_LOGMODULE_LWRESD, ISC_LOG_WARNING,
"lwres: failed to start %s: %s", socktext,
isc_result_totext(result));
ns_lwreslistener_detach(&listener);
return (ISC_R_SUCCESS);
}
if (oldlistener != NULL) {
/*
* Remove the old listener from the old list and shut it down.
*/
ISC_LIST_UNLINK(listeners, oldlistener, link);
listener_shutdown(oldlistener);
ns_lwreslistener_detach(&oldlistener);
} else {
isc_sockaddr_format(address, socktext, sizeof(socktext));
isc_log_write(ns_g_lctx, ISC_LOGCATEGORY_GENERAL,
NS_LOGMODULE_LWRESD, ISC_LOG_NOTICE,
"lwres listening on %s", socktext);
}
ISC_LIST_APPEND(*newlisteners, listener, link);
return (result);
}
void server_shutdown() {
int clientno;
for (clientno = 0; clientno < MAXCLIENTS; clientno++) {
if (CLIENT_USED(&clients[clientno]))
server_destroy(&clients[clientno], "server shutdown");
}
listener_shutdown();
#ifdef WIN32
WSACleanup();
#endif
}
isc_result_t
ns_lwresd_configure(isc_mem_t *mctx, const cfg_obj_t *config) {
const cfg_obj_t *lwreslist = NULL;
const cfg_obj_t *lwres = NULL;
const cfg_obj_t *listenerslist = NULL;
const cfg_listelt_t *element = NULL;
ns_lwreslistener_t *listener;
ns_lwreslistenerlist_t newlisteners;
isc_result_t result;
char socktext[ISC_SOCKADDR_FORMATSIZE];
isc_sockaddr_t *addrs = NULL;
ns_lwresd_t *lwresd = NULL;
isc_uint32_t count = 0;
REQUIRE(mctx != NULL);
REQUIRE(config != NULL);
RUNTIME_CHECK(isc_once_do(&once, initialize_mutex) == ISC_R_SUCCESS);
ISC_LIST_INIT(newlisteners);
result = cfg_map_get(config, "lwres", &lwreslist);
if (result != ISC_R_SUCCESS)
return (ISC_R_SUCCESS);
LOCK(&listeners_lock);
/*
* Run through the new lwres address list, noting sockets that
* are already being listened on and moving them to the new list.
*
* Identifying duplicates addr/port combinations is left to either
* the underlying config code, or to the bind attempt getting an
* address-in-use error.
*/
for (element = cfg_list_first(lwreslist);
element != NULL;
element = cfg_list_next(element))
{
in_port_t port;
lwres = cfg_listelt_value(element);
CHECK(ns_lwdmanager_create(mctx, lwres, &lwresd));
port = lwresd_g_listenport;
if (port == 0)
port = LWRES_UDP_PORT;
listenerslist = NULL;
(void)cfg_map_get(lwres, "listen-on", &listenerslist);
if (listenerslist == NULL) {
struct in_addr localhost;
isc_sockaddr_t address;
localhost.s_addr = htonl(INADDR_LOOPBACK);
isc_sockaddr_fromin(&address, &localhost, port);
CHECK(configure_listener(&address, lwresd, mctx,
&newlisteners));
} else {
isc_uint32_t i;
CHECK(ns_config_getiplist(config, listenerslist,
port, mctx, &addrs, &count));
for (i = 0; i < count; i++)
CHECK(configure_listener(&addrs[i], lwresd,
mctx, &newlisteners));
ns_config_putiplist(mctx, &addrs, count);
}
ns_lwdmanager_detach(&lwresd);
}
/*
* Shutdown everything on the listeners list, and remove them from
* the list. Then put all of the new listeners on it.
*/
while (!ISC_LIST_EMPTY(listeners)) {
listener = ISC_LIST_HEAD(listeners);
ISC_LIST_UNLINK(listeners, listener, link);
isc_sockaddr_format(&listener->address,
socktext, sizeof(socktext));
listener_shutdown(listener);
ns_lwreslistener_detach(&listener);
isc_log_write(ns_g_lctx, ISC_LOGCATEGORY_GENERAL,
NS_LOGMODULE_LWRESD, ISC_LOG_NOTICE,
"lwres no longer listening on %s", socktext);
}
cleanup:
ISC_LIST_APPENDLIST(listeners, newlisteners, link);
if (addrs != NULL)
ns_config_putiplist(mctx, &addrs, count);
if (lwresd != NULL)
ns_lwdmanager_detach(&lwresd);
UNLOCK(&listeners_lock);
return (result);
}
