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[PATCHv5,3/6] API: pktio: mac addr get function

Message ID 1417694439-13861-4-git-send-email-maxim.uvarov@linaro.org
State New
Headers show

Commit Message

Maxim Uvarov Dec. 4, 2014, noon UTC 
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>
---
 platform/linux-generic/include/api/odp_packet_io.h | 12 +++++++
 platform/linux-generic/odp_packet_io.c             | 38 ++++++++++++++++++++++
 2 files changed, 50 insertions(+)
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Patch

diff --git a/platform/linux-generic/include/api/odp_packet_io.h b/platform/linux-generic/include/api/odp_packet_io.h
index df2b138..152d23b 100644
--- a/platform/linux-generic/include/api/odp_packet_io.h
+++ b/platform/linux-generic/include/api/odp_packet_io.h
@@ -177,6 +177,18 @@  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[in]  id         ODP packet IO handle.
+ * @param[out] mac_addr   Storage for MAC address of the packet IO interface.
+ * @param[in]  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, unsigned char *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 b0c00c0..4b9a528 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>
 
 typedef struct {
 	pktio_entry_t entries[ODP_CONFIG_PKTIO_ENTRIES];
@@ -633,3 +634,40 @@  int odp_pktio_promisc_mode(odp_pktio_t id)
 	else
 		return 0;
 }
+
+size_t odp_pktio_mac_addr(odp_pktio_t id, unsigned char *mac_addr,
+		       size_t addr_size)
+{
+	pktio_entry_t *entry;
+	int sockfd;
+	struct ifreq ifr;
+	int ret;
+
+	if (addr_size < ETH_ALEN)
+		return 0;
+
+	entry = get_entry(id);
+	if (entry == NULL) {
+		ODP_DBG("pktio entry %d does not exist\n", id);
+		return 0;
+	}
+
+	lock_entry(entry);
+
+	sockfd = sockfd_from_pktio_entry(entry);
+	strncpy(ifr.ifr_name, entry->s.name, IFNAMSIZ - 1);
+	ifr.ifr_name[IFNAMSIZ - 1] = 0;
+
+	ret = ioctl(sockfd, SIOCGIFHWADDR, &ifr);
+	if (ret < 0) {
+		unlock_entry(entry);
+		ODP_DBG("ioctl SIOCGIFHWADDR error\n");
+		return 0;
+	}
+
+	memcpy(mac_addr, (unsigned char *)ifr.ifr_ifru.ifru_hwaddr.sa_data,
+	       ETH_ALEN);
+	unlock_entry(entry);
+
+	return ETH_ALEN;
+}