sd-dhcp-client: rebind raw socket when resetting transaction id

As we are now filtering the raw socket based on the transaction id, we must
reset the BPF when we reset the transaction id.

diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index afad776..4be37a2 100644 (file)
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -473,7 +473,13 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
                 /* start over as we did not receive a timely ack or nak */
                 client->state = DHCP_STATE_INIT;
                 client->attempt = 1;
+
+                client->fd = safe_close(client->fd);
                 client->xid = random_u32();
+                r = dhcp_network_bind_raw_socket(client->index, &client->link, client->xid);
+                if (r < 0)
+                        goto error;
+                client->fd = r;
 
                 /* fall through */
         case DHCP_STATE_INIT: