[PATCH 11/12] net/pcap: support MAC address set

[Stephen Hemminger <stephen@networkplumber.org>]

When using pcap on a single interface, it is possible for
driver to proxy the mac address set operation.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/pcap/pcap_ethdev.c        | 13 ++++++++++++
 drivers/net/pcap/pcap_osdep.h         |  1 +
 drivers/net/pcap/pcap_osdep_freebsd.c | 23 ++++++++++++++++++++
 drivers/net/pcap/pcap_osdep_linux.c   | 30 ++++++++++++++++++++++++++-
 4 files changed, 66 insertions(+), 1 deletion(-)

diff --git a/drivers/net/pcap/pcap_ethdev.c b/drivers/net/pcap/pcap_ethdev.c
index bf863e8708..79f2e28fbc 100644
--- a/drivers/net/pcap/pcap_ethdev.c
+++ b/drivers/net/pcap/pcap_ethdev.c
@@ -1103,6 +1103,18 @@ eth_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	return 0;
 }
 
+static int
+eth_dev_macaddr_set(struct rte_eth_dev *dev, struct rte_ether_addr *addr)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+
+	if (internals->single_iface)
+		return osdep_iface_mac_set(internals->if_index, addr);
+	else
+		return -ENOTSUP;
+}
+
+
 /* Timestamp values in receive packets from libpcap are in UTC */
 static int
 eth_rx_clock(struct rte_eth_dev *dev __rte_unused, uint64_t *timestamp)
@@ -1127,6 +1139,7 @@ static const struct eth_dev_ops ops = {
 	.rx_queue_stop = eth_rx_queue_stop,
 	.tx_queue_stop = eth_tx_queue_stop,
 	.link_update = eth_link_update,
+	.mac_addr_set = eth_dev_macaddr_set,
 	.mtu_set = eth_mtu_set,
 	.stats_get = eth_stats_get,
 	.stats_reset = eth_stats_reset,
diff --git a/drivers/net/pcap/pcap_osdep.h b/drivers/net/pcap/pcap_osdep.h
index 3c8b7ff27b..00944e0843 100644
--- a/drivers/net/pcap/pcap_osdep.h
+++ b/drivers/net/pcap/pcap_osdep.h
@@ -14,6 +14,7 @@ extern int eth_pcap_logtype;
 
 int osdep_iface_index_get(const char *name);
 int osdep_iface_mac_get(const char *name, struct rte_ether_addr *mac);
+int osdep_iface_mac_set(int ifindex, const struct rte_ether_addr *mac);
 int osdep_iface_mtu_set(int index, uint16_t mtu);
 
 #endif
diff --git a/drivers/net/pcap/pcap_osdep_freebsd.c b/drivers/net/pcap/pcap_osdep_freebsd.c
index 0279dbf00b..39227da63a 100644
--- a/drivers/net/pcap/pcap_osdep_freebsd.c
+++ b/drivers/net/pcap/pcap_osdep_freebsd.c
@@ -58,6 +58,29 @@ osdep_iface_mac_get(const char *if_name, struct rte_ether_addr *mac)
 	return 0;
 }
 
+int
+osdep_iface_mac_set(int ifindex, const struct rte_ether_addr *mac)
+{
+	char ifname[IFNAMSIZ];
+
+	if (if_indextoname(ifindex, ifname) == NULL)
+		return -errno;
+
+	int s = socket(AF_INET, SOCK_DGRAM, 0);
+	if (s < 0)
+		return -errno;
+
+	struct ifreq ifr = { 0 };
+	strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
+	ifr.ifr_addr.sa_family = AF_LINK;
+	memcpy(ifr.ifr_addr.sa_data, mac, sizeof(*mac));
+
+	int ret = ioctl(s, SIOCSIFLLADDR, &ifr);
+	close(s);
+
+	return (ret < 0) ? -errno : 0;
+}
+
 int osdep_iface_mtu_set(int ifindex, uint16_t mtu)
 {
 	char ifname[IFNAMSIZ];
diff --git a/drivers/net/pcap/pcap_osdep_linux.c b/drivers/net/pcap/pcap_osdep_linux.c
index d180e9b4b4..d5a3855a0a 100644
--- a/drivers/net/pcap/pcap_osdep_linux.c
+++ b/drivers/net/pcap/pcap_osdep_linux.c
@@ -4,13 +4,18 @@
  * All rights reserved.
  */
 
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <errno.h>
 #include <net/if.h>
+#include <net/if_arp.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
-#include <unistd.h>
 
 #include <rte_memcpy.h>
 #include <rte_string_fns.h>
+#include <rte_ether.h>
 
 #include "pcap_osdep.h"
 
@@ -41,6 +46,29 @@ osdep_iface_mac_get(const char *if_name, struct rte_ether_addr *mac)
 	return 0;
 }
 
+int
+osdep_iface_mac_set(int ifindex, const struct rte_ether_addr *mac)
+{
+	char ifname[IFNAMSIZ];
+
+	if (if_indextoname(ifindex, ifname) == NULL)
+		return -errno;
+
+	int s = socket(AF_INET, SOCK_DGRAM, 0);
+	if (s < 0)
+		return -errno;
+
+	struct ifreq ifr = { 0 };
+	strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
+	ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+	memcpy(ifr.ifr_hwaddr.sa_data, mac, sizeof(*mac));
+
+	int ret = ioctl(s, SIOCSIFHWADDR, &ifr);
+	close(s);
+
+	return (ret < 0) ? -errno : 0;
+}
+
 int
 osdep_iface_mtu_set(int ifindex, uint16_t mtu)
 {
-- 
2.51.0