s3: Send a dropped_ip message if we lose an IP

diff --git a/source3/winbindd/winbindd.c b/source3/winbindd/winbindd.c
index bbd602ee8c8b853fee86e6f6efae6a1c46a64157..acf5e9d9752baa2b594ade3ac872f4e7fd360f48 100644 (file)
--- a/source3/winbindd/winbindd.c
+++ b/source3/winbindd/winbindd.c
@@ -24,6 +24,7 @@
 
 #include "includes.h"
 #include "winbindd.h"
+#include "lib/addrchange.h"
 
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_WINBIND
@@ -1143,6 +1144,86 @@ bool winbindd_use_cache(void)
        return !opt_nocache;
 }
 
+struct winbindd_addrchanged_state {
+       struct addrchange_context *ctx;
+       struct tevent_context *ev;
+       struct messaging_context *msg_ctx;
+};
+
+static void winbindd_addr_changed(struct tevent_req *req);
+
+static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
+                                    struct tevent_context *ev,
+                                    struct messaging_context *msg_ctx)
+{
+       struct winbindd_addrchanged_state *state;
+       struct tevent_req *req;
+       NTSTATUS status;
+
+       state = talloc(mem_ctx, struct winbindd_addrchanged_state);
+       if (state == NULL) {
+               DEBUG(10, ("talloc failed\n"));
+               return;
+       }
+       state->ev = ev;
+       state->msg_ctx = msg_ctx;
+
+       status = addrchange_context_create(state, &state->ctx);
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(10, ("addrchange_context_create failed: %s\n",
+                          nt_errstr(status)));
+               TALLOC_FREE(state);
+               return;
+       }
+       req = addrchange_send(state, ev, state->ctx);
+       if (req == NULL) {
+               DEBUG(10, ("addrchange_send failed\n"));
+               TALLOC_FREE(state);
+       }
+       tevent_req_set_callback(req, winbindd_addr_changed, state);
+}
+
+static void winbindd_addr_changed(struct tevent_req *req)
+{
+       struct winbindd_addrchanged_state *state = tevent_req_callback_data(
+               req, struct winbindd_addrchanged_state);
+       enum addrchange_type type;
+       struct sockaddr_storage addr;
+       NTSTATUS status;
+
+       status = addrchange_recv(req, &type, &addr);
+       TALLOC_FREE(req);
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
+                          nt_errstr(status)));
+               TALLOC_FREE(state);
+       }
+       if (type == ADDRCHANGE_DEL) {
+               char addrstr[INET6_ADDRSTRLEN];
+               DATA_BLOB blob;
+
+               print_sockaddr(addrstr, sizeof(addrstr), &addr);
+
+               DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
+                         addrstr));
+
+               blob = data_blob_const(addrstr, strlen(addrstr)+1);
+
+               status = messaging_send(state->msg_ctx, procid_self(),
+                                       MSG_WINBIND_IP_DROPPED, &blob);
+               if (!NT_STATUS_IS_OK(status)) {
+                       DEBUG(10, ("messaging_send failed: %s\n",
+                                  nt_errstr(status)));
+               }
+       }
+       req = addrchange_send(state, state->ev, state->ctx);
+       if (req == NULL) {
+               DEBUG(10, ("addrchange_send failed\n"));
+               TALLOC_FREE(state);
+       }
+       tevent_req_set_callback(req, winbindd_addr_changed, state);
+}
+
 /* Main function */
 
 int main(int argc, char **argv, char **envp)
@@ -1420,6 +1501,9 @@ int main(int argc, char **argv, char **envp)
        smb_nscd_flush_user_cache();
        smb_nscd_flush_group_cache();
 
+       winbindd_init_addrchange(NULL, winbind_event_context(),
+                                winbind_messaging_context());
+
        /* setup listen sockets */
 
        if (!winbindd_setup_listeners()) {