API: pktio: mac addr get function

Define API to get MAC address for specific packet i/o and
implement linux-generic version.

Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Reviewed-by: Petri Savolainen <petri.savolainen@linaro.org>
Reviewed-by: Victor Kamensky <victor.kamensky@linaro.org>
Reviewed-by: Ciprian Barbu <ciprian.barbu@linaro.org>

2 files changed, 54 insertions, 0 deletions

diff --git a/platform/linux-generic/include/api/odp_packet_io.h b/platform/linux-generic/include/api/odp_packet_io.h
index 742ea591f..63c047c54 100644
--- a/platform/linux-generic/include/api/odp_packet_io.h
+++ b/platform/linux-generic/include/api/odp_packet_io.h
@@ -175,6 +175,18 @@ int odp_pktio_promisc_mode_set(odp_pktio_t id, odp_bool_t enable);
 int odp_pktio_promisc_mode(odp_pktio_t id);
 
 /**
+ * Get the default MAC address of a packet IO interface.
+ *
+ * @param	id	  ODP packet IO handle.
+ * @param[out]	mac_addr  Storage for MAC address of the packet IO interface.
+ * @param	addr_size Storage size for the address
+ *
+ * @retval Number of bytes written on success, 0 on failure.
+ */
+size_t odp_pktio_mac_addr(odp_pktio_t id, void *mac_addr,
+			  size_t addr_size);
+
+/**
  * @}
  */
 
diff --git a/platform/linux-generic/odp_packet_io.c b/platform/linux-generic/odp_packet_io.c
index fea53aaca..de24e6f0b 100644
--- a/platform/linux-generic/odp_packet_io.c
+++ b/platform/linux-generic/odp_packet_io.c
@@ -21,6 +21,7 @@
 
 #include <string.h>
 #include <sys/ioctl.h>
+#include <linux/if_arp.h>
 
 static pktio_table_t *pktio_tbl;
 
@@ -662,3 +663,44 @@ int odp_pktio_promisc_mode(odp_pktio_t id)
 	else
 		return 0;
 }
+
+size_t odp_pktio_mac_addr(odp_pktio_t id, void *mac_addr,
+		       size_t addr_size)
+{
+	pktio_entry_t *entry;
+
+	if (addr_size < ETH_ALEN)
+		return 0;
+
+	entry = get_pktio_entry(id);
+	if (entry == NULL) {
+		ODP_DBG("pktio entry %d does not exist\n", id);
+		return 0;
+	}
+
+	lock_entry(entry);
+
+	if (odp_unlikely(is_free(entry))) {
+		unlock_entry(entry);
+		ODP_DBG("already freed pktio\n");
+		return -1;
+	}
+
+	switch (entry->s.type) {
+	case ODP_PKTIO_TYPE_SOCKET_BASIC:
+	case ODP_PKTIO_TYPE_SOCKET_MMSG:
+		memcpy(mac_addr, entry->s.pkt_sock.if_mac,
+		       ETH_ALEN);
+		break;
+	case ODP_PKTIO_TYPE_SOCKET_MMAP:
+		memcpy(mac_addr, entry->s.pkt_sock_mmap.if_mac,
+		       ETH_ALEN);
+		break;
+	default:
+		ODP_ABORT("Wrong socket type %d\n", entry->s.type);
+	}
+
+	unlock_entry(entry);
+
+	return ETH_ALEN;
+}