From: Michael Brown <mcb30@ipxe.org>
Date: Wed, 5 Jul 2023 14:24:32 +0000 (+0100)
Subject: [linux] Set a default MAC address for tap devices
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f3036fc213b6e6cce0bf5572167b93b9e9959a3a;p=thirdparty%2Fipxe.git

[linux] Set a default MAC address for tap devices

Avoid the need to always specify a local MAC address on the command
line by setting a default hardware MAC address (using the same default
address as for slirp devices).

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

diff --git a/src/drivers/linux/tap.c b/src/drivers/linux/tap.c
index 9b52c20ab..c1364ddb5 100644
--- a/src/drivers/linux/tap.c
+++ b/src/drivers/linux/tap.c
@@ -56,6 +56,10 @@ struct tap_nic {
 	int fd;
 };
 
+/** Default MAC address */
+static const uint8_t tap_default_mac[ETH_ALEN] =
+	{ 0x52, 0x54, 0x00, 0x12, 0x34, 0x56 };
+
 /** Open the TAP device */
 static int tap_open(struct net_device * netdev)
 {
@@ -202,6 +206,7 @@ static int tap_probe(struct linux_device *device, struct linux_device_request *r
 	nic = netdev->priv;
 	linux_set_drvdata(device, netdev);
 	netdev->dev = &device->dev;
+	memcpy ( netdev->hw_addr, tap_default_mac, ETH_ALEN );
 	memset(nic, 0, sizeof(*nic));
 
 	/* Look for the mandatory if setting */