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-rw-r--r--pkg/tcpip/header/eth.go6
-rw-r--r--pkg/tcpip/link/ethernet/ethernet.go23
-rw-r--r--pkg/tcpip/transport/raw/endpoint.go30
-rw-r--r--runsc/boot/loader.go3
-rw-r--r--runsc/boot/network.go3
5 files changed, 40 insertions, 25 deletions
diff --git a/pkg/tcpip/header/eth.go b/pkg/tcpip/header/eth.go
index 95ade0e5c..1f18213e5 100644
--- a/pkg/tcpip/header/eth.go
+++ b/pkg/tcpip/header/eth.go
@@ -49,9 +49,9 @@ const (
// EthernetAddressSize is the size, in bytes, of an ethernet address.
EthernetAddressSize = 6
- // unspecifiedEthernetAddress is the unspecified ethernet address
+ // UnspecifiedEthernetAddress is the unspecified ethernet address
// (all bits set to 0).
- unspecifiedEthernetAddress = tcpip.LinkAddress("\x00\x00\x00\x00\x00\x00")
+ UnspecifiedEthernetAddress = tcpip.LinkAddress("\x00\x00\x00\x00\x00\x00")
// EthernetBroadcastAddress is an ethernet address that addresses every node
// on a local link.
@@ -134,7 +134,7 @@ func IsValidUnicastEthernetAddress(addr tcpip.LinkAddress) bool {
return false
}
- if addr == unspecifiedEthernetAddress {
+ if addr == UnspecifiedEthernetAddress {
return false
}
diff --git a/pkg/tcpip/link/ethernet/ethernet.go b/pkg/tcpip/link/ethernet/ethernet.go
index b427c6170..b9db273d0 100644
--- a/pkg/tcpip/link/ethernet/ethernet.go
+++ b/pkg/tcpip/link/ethernet/ethernet.go
@@ -42,6 +42,14 @@ type Endpoint struct {
nested.Endpoint
}
+// LinkAddress implements stack.LinkEndpoint.
+func (e *Endpoint) LinkAddress() tcpip.LinkAddress {
+ if l := e.Endpoint.LinkAddress(); len(l) != 0 {
+ return l
+ }
+ return header.UnspecifiedEthernetAddress
+}
+
// DeliverNetworkPacket implements stack.NetworkDispatcher.
func (e *Endpoint) DeliverNetworkPacket(_, _ tcpip.LinkAddress, _ tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) {
hdr, ok := pkt.LinkHeader().Consume(header.EthernetMinimumSize)
@@ -57,18 +65,22 @@ func (e *Endpoint) DeliverNetworkPacket(_, _ tcpip.LinkAddress, _ tcpip.NetworkP
// Capabilities implements stack.LinkEndpoint.
func (e *Endpoint) Capabilities() stack.LinkEndpointCapabilities {
- return stack.CapabilityResolutionRequired | e.Endpoint.Capabilities()
+ c := e.Endpoint.Capabilities()
+ if c&stack.CapabilityLoopback == 0 {
+ c |= stack.CapabilityResolutionRequired
+ }
+ return c
}
// WritePacket implements stack.LinkEndpoint.
func (e *Endpoint) WritePacket(r stack.RouteInfo, proto tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) tcpip.Error {
- e.AddHeader(e.Endpoint.LinkAddress(), r.RemoteLinkAddress, proto, pkt)
+ e.AddHeader(e.LinkAddress(), r.RemoteLinkAddress, proto, pkt)
return e.Endpoint.WritePacket(r, proto, pkt)
}
// WritePackets implements stack.LinkEndpoint.
func (e *Endpoint) WritePackets(r stack.RouteInfo, pkts stack.PacketBufferList, proto tcpip.NetworkProtocolNumber) (int, tcpip.Error) {
- linkAddr := e.Endpoint.LinkAddress()
+ linkAddr := e.LinkAddress()
for pkt := pkts.Front(); pkt != nil; pkt = pkt.Next() {
e.AddHeader(linkAddr, r.RemoteLinkAddress, proto, pkt)
@@ -83,7 +95,10 @@ func (e *Endpoint) MaxHeaderLength() uint16 {
}
// ARPHardwareType implements stack.LinkEndpoint.
-func (*Endpoint) ARPHardwareType() header.ARPHardwareType {
+func (e *Endpoint) ARPHardwareType() header.ARPHardwareType {
+ if a := e.Endpoint.ARPHardwareType(); a != header.ARPHardwareNone {
+ return a
+ }
return header.ARPHardwareEther
}
diff --git a/pkg/tcpip/transport/raw/endpoint.go b/pkg/tcpip/transport/raw/endpoint.go
index b3d8951ff..55854ba59 100644
--- a/pkg/tcpip/transport/raw/endpoint.go
+++ b/pkg/tcpip/transport/raw/endpoint.go
@@ -321,28 +321,26 @@ func (e *endpoint) write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, tcp
}
defer route.Release()
+ pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
+ ReserveHeaderBytes: int(route.MaxHeaderLength()),
+ Data: buffer.View(payloadBytes).ToVectorisedView(),
+ })
+ pkt.Owner = owner
+
if e.ops.GetHeaderIncluded() {
- pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
- Data: buffer.View(payloadBytes).ToVectorisedView(),
- })
if err := route.WriteHeaderIncludedPacket(pkt); err != nil {
return 0, err
}
- } else {
- pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
- ReserveHeaderBytes: int(route.MaxHeaderLength()),
- Data: buffer.View(payloadBytes).ToVectorisedView(),
- })
- pkt.Owner = owner
- if err := route.WritePacket(stack.NetworkHeaderParams{
- Protocol: e.TransProto,
- TTL: route.DefaultTTL(),
- TOS: stack.DefaultTOS,
- }, pkt); err != nil {
- return 0, err
- }
+ return int64(len(payloadBytes)), nil
}
+ if err := route.WritePacket(stack.NetworkHeaderParams{
+ Protocol: e.TransProto,
+ TTL: route.DefaultTTL(),
+ TOS: stack.DefaultTOS,
+ }, pkt); err != nil {
+ return 0, err
+ }
return int64(len(payloadBytes)), nil
}
diff --git a/runsc/boot/loader.go b/runsc/boot/loader.go
index ec9188021..3f667cd74 100644
--- a/runsc/boot/loader.go
+++ b/runsc/boot/loader.go
@@ -58,6 +58,7 @@ import (
"gvisor.dev/gvisor/pkg/sentry/watchdog"
"gvisor.dev/gvisor/pkg/sync"
"gvisor.dev/gvisor/pkg/tcpip"
+ "gvisor.dev/gvisor/pkg/tcpip/link/ethernet"
"gvisor.dev/gvisor/pkg/tcpip/link/loopback"
"gvisor.dev/gvisor/pkg/tcpip/link/sniffer"
"gvisor.dev/gvisor/pkg/tcpip/network/arp"
@@ -1174,7 +1175,7 @@ func (f *sandboxNetstackCreator) CreateStack() (inet.Stack, error) {
n := &Network{Stack: s.(*netstack.Stack).Stack}
nicID := tcpip.NICID(f.uniqueID.UniqueID())
link := DefaultLoopbackLink
- linkEP := loopback.New()
+ linkEP := ethernet.New(loopback.New())
if err := n.createNICWithAddrs(nicID, link.Name, linkEP, link.Addresses); err != nil {
return nil, err
}
diff --git a/runsc/boot/network.go b/runsc/boot/network.go
index 7e627e4c6..5c6879198 100644
--- a/runsc/boot/network.go
+++ b/runsc/boot/network.go
@@ -23,6 +23,7 @@ import (
"golang.org/x/sys/unix"
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/pkg/tcpip"
+ "gvisor.dev/gvisor/pkg/tcpip/link/ethernet"
"gvisor.dev/gvisor/pkg/tcpip/link/fdbased"
"gvisor.dev/gvisor/pkg/tcpip/link/loopback"
"gvisor.dev/gvisor/pkg/tcpip/link/packetsocket"
@@ -169,7 +170,7 @@ func (n *Network) CreateLinksAndRoutes(args *CreateLinksAndRoutesArgs, _ *struct
nicID++
nicids[link.Name] = nicID
- linkEP := loopback.New()
+ linkEP := ethernet.New(loopback.New())
log.Infof("Enabling loopback interface %q with id %d on addresses %+v", link.Name, nicID, link.Addresses)
if err := n.createNICWithAddrs(nicID, link.Name, linkEP, link.Addresses); err != nil {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-20 05:40:00 +0000