static void
ns_interfacemgr_scan0(ns_interfacemgr_t *mgr, ns_listenlist_t *ext_listen,
isc_boolean_t verbose)
{
isc_boolean_t purge = ISC_TRUE;
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
mgr->generation++; /* Increment the generation count. */
if (do_scan(mgr, ext_listen, verbose) != ISC_R_SUCCESS)
purge = ISC_FALSE;
/*
* Now go through the interface list and delete anything that
* does not have the current generation number. This is
* how we catch interfaces that go away or change their
* addresses.
*/
if (purge)
purge_old_interfaces(mgr);
/*
* Warn if we are not listening on any interface, unless
* we're in lwresd-only mode, in which case that is to
* be expected.
*/
if (ext_listen == NULL &&
ISC_LIST_EMPTY(mgr->interfaces) && ! ns_g_lwresdonly) {
isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_WARNING,
"not listening on any interfaces");
}
}
void
ns_interfacemgr_attach(ns_interfacemgr_t *source, ns_interfacemgr_t **target) {
REQUIRE(NS_INTERFACEMGR_VALID(source));
LOCK(&source->lock);
INSIST(source->references > 0);
source->references++;
UNLOCK(&source->lock);
*target = source;
}
static void
ns_interfacemgr_destroy(ns_interfacemgr_t *mgr) {
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
dns_aclenv_destroy(&mgr->aclenv);
ns_listenlist_detach(&mgr->listenon4);
ns_listenlist_detach(&mgr->listenon6);
clearlistenon(mgr);
DESTROYLOCK(&mgr->lock);
mgr->magic = 0;
isc_mem_putanddetach(&mgr->mctx, mgr, sizeof(*mgr));
}
void
ns_interfacemgr_shutdown(ns_interfacemgr_t *mgr) {
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
/*%
* Shut down and detach all interfaces.
* By incrementing the generation count, we make purge_old_interfaces()
* consider all interfaces "old".
*/
mgr->generation++;
purge_old_interfaces(mgr);
}
void
ns_interfacemgr_detach(ns_interfacemgr_t **targetp) {
isc_result_t need_destroy = ISC_FALSE;
ns_interfacemgr_t *target = *targetp;
REQUIRE(target != NULL);
REQUIRE(NS_INTERFACEMGR_VALID(target));
LOCK(&target->lock);
REQUIRE(target->references > 0);
target->references--;
if (target->references == 0)
need_destroy = ISC_TRUE;
UNLOCK(&target->lock);
if (need_destroy)
ns_interfacemgr_destroy(target);
*targetp = NULL;
}
static void
ns_interfacemgr_destroy(ns_interfacemgr_t *mgr) {
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
#ifdef USE_ROUTE_SOCKET
if (mgr->route != NULL)
isc_socket_detach(&mgr->route);
if (mgr->task != NULL)
isc_task_detach(&mgr->task);
#endif
dns_aclenv_destroy(&mgr->aclenv);
ns_listenlist_detach(&mgr->listenon4);
ns_listenlist_detach(&mgr->listenon6);
clearlistenon(mgr);
DESTROYLOCK(&mgr->lock);
mgr->magic = 0;
isc_mem_putanddetach(&mgr->mctx, mgr, sizeof(*mgr));
}
void
ns_interfacemgr_shutdown(ns_interfacemgr_t *mgr) {
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
/*%
* Shut down and detach all interfaces.
* By incrementing the generation count, we make purge_old_interfaces()
* consider all interfaces "old".
*/
mgr->generation++;
#ifdef USE_ROUTE_SOCKET
LOCK(&mgr->lock);
if (mgr->route != NULL) {
isc_socket_cancel(mgr->route, mgr->task, ISC_SOCKCANCEL_RECV);
isc_socket_detach(&mgr->route);
isc_task_detach(&mgr->task);
}
UNLOCK(&mgr->lock);
#endif
purge_old_interfaces(mgr);
}
static isc_result_t
ns_interface_create(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr,
const char *name, ns_interface_t **ifpret)
{
ns_interface_t *ifp;
isc_result_t result;
int disp;
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
ifp = isc_mem_get(mgr->mctx, sizeof(*ifp));
if (ifp == NULL)
return (ISC_R_NOMEMORY);
ifp->mgr = NULL;
ifp->generation = mgr->generation;
ifp->addr = *addr;
ifp->flags = 0;
strncpy(ifp->name, name, sizeof(ifp->name));
ifp->name[sizeof(ifp->name)-1] = '\0';
ifp->clientmgr = NULL;
result = isc_mutex_init(&ifp->lock);
if (result != ISC_R_SUCCESS)
goto lock_create_failure;
result = ns_clientmgr_create(mgr->mctx, mgr->taskmgr,
ns_g_timermgr,
&ifp->clientmgr);
if (result != ISC_R_SUCCESS) {
isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_ERROR,
"ns_clientmgr_create() failed: %s",
isc_result_totext(result));
goto clientmgr_create_failure;
}
for (disp = 0; disp < MAX_UDP_DISPATCH; disp++)
ifp->udpdispatch[disp] = NULL;
ifp->tcpsocket = NULL;
/*
* Create a single TCP client object. It will replace itself
* with a new one as soon as it gets a connection, so the actual
* connections will be handled in parallel even though there is
* only one client initially.
*/
ifp->ntcptarget = 1;
ifp->ntcpcurrent = 0;
ifp->nudpdispatch = 0;
ISC_LINK_INIT(ifp, link);
ns_interfacemgr_attach(mgr, &ifp->mgr);
ISC_LIST_APPEND(mgr->interfaces, ifp, link);
ifp->references = 1;
ifp->magic = IFACE_MAGIC;
*ifpret = ifp;
return (ISC_R_SUCCESS);
clientmgr_create_failure:
DESTROYLOCK(&ifp->lock);
lock_create_failure:
ifp->magic = 0;
isc_mem_put(mgr->mctx, ifp, sizeof(*ifp));
return (ISC_R_UNEXPECTED);
}
isc_boolean_t
ns_interfacemgr_islistening(ns_interfacemgr_t *mgr) {
REQUIRE(NS_INTERFACEMGR_VALID(mgr));
return (ISC_LIST_EMPTY(mgr->interfaces) ? ISC_FALSE : ISC_TRUE);
}