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netkit: Allow setting MAC address in L2 mode

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Signed-off-by: Jordan Rife <jrife@google.com>
This commit is contained in:
Jordan Rife 2025-02-22 17:28:57 -08:00 committed by Alessandro Boch
parent 0af32151e7
commit 0e7078ed04
2 changed files with 19 additions and 4 deletions

7
link_linux.go
View File

@ -2671,8 +2671,8 @@ func (h *Handle) LinkSetGroup(link Link, group int) error {
}
func addNetkitAttrs(nk *Netkit, linkInfo *nl.RtAttr, flag int) error {
if nk.peerLinkAttrs.HardwareAddr != nil || nk.HardwareAddr != nil {
return fmt.Errorf("netkit doesn't support setting Ethernet")
if nk.Mode != NETKIT_MODE_L2 && (nk.LinkAttrs.HardwareAddr != nil || nk.peerLinkAttrs.HardwareAddr != nil) {
return fmt.Errorf("netkit only allows setting Ethernet in L2 mode")
}
data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
@ -2724,6 +2724,9 @@ func addNetkitAttrs(nk *Netkit, linkInfo *nl.RtAttr, flag int) error {
peer.AddRtAttr(unix.IFLA_NET_NS_FD, nl.Uint32Attr(uint32(ns)))
}
}
if nk.peerLinkAttrs.HardwareAddr != nil {
peer.AddRtAttr(unix.IFLA_ADDRESS, []byte(nk.peerLinkAttrs.HardwareAddr))
}
return nil
}

16
link_test.go
View File

@ -86,6 +86,11 @@ func testLinkAddDel(t *testing.T, link Link) {
if resultPrimary.SupportsScrub() && resultPrimary.PeerScrub != inputPrimary.PeerScrub {
t.Fatalf("Peer Scrub is %d, should be %d", int(resultPrimary.PeerScrub), int(inputPrimary.PeerScrub))
}
if inputPrimary.Mode == NETKIT_MODE_L2 && inputPrimary.HardwareAddr != nil {
if inputPrimary.HardwareAddr.String() != resultPrimary.HardwareAddr.String() {
t.Fatalf("Hardware address is %s, should be %s", resultPrimary.HardwareAddr.String(), inputPrimary.HardwareAddr.String())
}
}
if inputPrimary.peerLinkAttrs.Name != "" {
var resultPeer *Netkit
@ -117,6 +122,11 @@ func testLinkAddDel(t *testing.T, link Link) {
if resultPrimary.Scrub != resultPeer.PeerScrub {
t.Fatalf("PeerScrub from peer is %d, should be %d", int(resultPeer.PeerScrub), int(resultPrimary.Scrub))
}
if inputPrimary.Mode == NETKIT_MODE_L2 && inputPrimary.peerLinkAttrs.HardwareAddr != nil {
if inputPrimary.peerLinkAttrs.HardwareAddr.String() != resultPeer.HardwareAddr.String() {
t.Fatalf("Peer hardware address is %s, should be %s", resultPeer.HardwareAddr.String(), inputPrimary.peerLinkAttrs.HardwareAddr.String())
}
}
}
}
@ -1061,7 +1071,8 @@ func TestLinkAddDelNetkit(t *testing.T) {
netkit := &Netkit{
LinkAttrs: LinkAttrs{
Name: "foo",
Name: "foo",
HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55},
},
Mode: NETKIT_MODE_L2,
Policy: NETKIT_POLICY_FORWARD,
@ -1070,7 +1081,8 @@ func TestLinkAddDelNetkit(t *testing.T) {
PeerScrub: NETKIT_SCRUB_NONE,
}
peerAttr := &LinkAttrs{
Name: "bar",
Name: "bar",
HardwareAddr: net.HardwareAddr{0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB},
}
netkit.SetPeerAttrs(peerAttr)
testLinkAddDel(t, netkit)