[eoib] Silently ignore EoIB heartbeat packets

Some EoIB implementations transmit a vendor-proprietary heartbeat
packet on the same multicast group used to provide the EoIB broadcast
domain.

Silently ignore these heartbeat packets, to avoid cluttering up the
network interface error statistics.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/drivers/net/eoib.c b/src/drivers/net/eoib.c
index c5b2f5c7f0bdea0bc3bf681eb2089a8bd198dd62..44eed4cc5a96bbd8f60d08a98f94b7c210f329a3 100644 (file)
--- a/src/drivers/net/eoib.c
+++ b/src/drivers/net/eoib.c
@@ -752,3 +752,48 @@ struct ib_driver eoib_driver __ib_driver = {
        .notify = eoib_notify,
        .remove = eoib_remove,
 };
+
+/****************************************************************************
+ *
+ * EoIB heartbeat packets
+ *
+ ****************************************************************************
+ */
+
+/**
+ * Silently ignore incoming EoIB heartbeat packets
+ *
+ * @v iobuf            I/O buffer
+ * @v netdev           Network device
+ * @v ll_source                Link-layer source address
+ * @v flags            Packet flags
+ * @ret rc             Return status code
+ */
+static int eoib_heartbeat_rx ( struct io_buffer *iobuf,
+                              struct net_device *netdev __unused,
+                              const void *ll_dest __unused,
+                              const void *ll_source __unused,
+                              unsigned int flags __unused ) {
+       free_iob ( iobuf );
+       return 0;
+}
+
+/**
+ * Transcribe EoIB heartbeat address
+ *
+ * @v net_addr         EoIB heartbeat address
+ * @ret string         "<EoIB>"
+ *
+ * This operation is meaningless for the EoIB heartbeat protocol.
+ */
+static const char * eoib_heartbeat_ntoa ( const void *net_addr __unused ) {
+       return "<EoIB>";
+}
+
+/** EoIB heartbeat network protocol */
+struct net_protocol eoib_heartbeat_protocol __net_protocol = {
+       .name = "EoIB",
+       .net_proto = htons ( EOIB_MAGIC ),
+       .rx = eoib_heartbeat_rx,
+       .ntoa = eoib_heartbeat_ntoa,
+};