ndp: deregister netlink event socket for non recoverable errors

Deregister netlink event socket in case of error different
from ENOBUFS or failure to set netlink rx buffer size

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

3 files changed, 13 insertions, 2 deletions

diff --git a/src/ndp.c b/src/ndp.c
index c6e4eda..427547d 100644
--- a/src/ndp.c
+++ b/src/ndp.c
@@ -539,13 +539,17 @@ static void catch_rtnl_err(struct odhcpd_event *e, int error)
 	struct event_socket *ev_sock = container_of(e, struct event_socket, ev);
 
 	if (error != ENOBUFS)
-		return;
+		goto err;
 
 	/* Double netlink event buffer size */
 	ev_sock->sock_bufsize *= 2;
 
 	if (nl_socket_set_buffer_size(ev_sock->sock, ev_sock->sock_bufsize, 0))
-		return;
+		goto err;
 
 	dump_addr_table();
+	return;
+
+err:
+	odhcpd_deregister(e);
 }
diff --git a/src/odhcpd.c b/src/odhcpd.c
index 2b0ea98..ed96178 100644
--- a/src/odhcpd.c
+++ b/src/odhcpd.c
@@ -566,6 +566,12 @@ int odhcpd_register(struct odhcpd_event *event)
 			((event->handle_error) ? ULOOP_ERROR_CB : 0));
 }
 
+int odhcpd_deregister(struct odhcpd_event *event)
+{
+	event->uloop.cb = NULL;
+	return uloop_fd_delete(&event->uloop);
+}
+
 void odhcpd_process(struct odhcpd_event *event)
 {
 	odhcpd_receive_packets(&event->uloop, 0);
diff --git a/src/odhcpd.h b/src/odhcpd.h
index 393194c..fb78ec0 100644
--- a/src/odhcpd.h
+++ b/src/odhcpd.h
@@ -188,6 +188,7 @@ extern struct list_head interfaces;
 
 // Exported main functions
 int odhcpd_register(struct odhcpd_event *event);
+int odhcpd_deregister(struct odhcpd_event *event);
 void odhcpd_process(struct odhcpd_event *event);
 
 struct nl_sock *odhcpd_create_nl_socket(int protocol);