udhcpc: periodically reread our ifindex and mac

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index f685a1d22..f0c8ace2d 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -1167,6 +1167,16 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
                  * resend discover/renew/whatever
                  */
                 if (retval == 0) {
+                        /* When running on a bridge, the ifindex may have changed
+                         * (e.g. if member interfaces were added/removed
+                         * or if the status of the bridge changed).
+                         * Refresh ifindex and client_mac:
+                         */
+                        udhcp_read_interface(client_config.interface,
+                                &client_config.ifindex,
+                                NULL,
+                                client_config.client_mac);
+
                         /* We will restart the wait in any case */
                         already_waited_sec = 0;