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-rw-r--r--pkg/tcpip/network/ipv4/ipv4.go26
-rw-r--r--pkg/tcpip/network/ipv4/ipv4_test.go6
-rw-r--r--pkg/tcpip/network/ipv6/ipv6.go3
-rw-r--r--pkg/tcpip/stack/packet_buffer.go10
-rw-r--r--pkg/tcpip/stack/registration.go4
5 files changed, 33 insertions, 16 deletions
diff --git a/pkg/tcpip/network/ipv4/ipv4.go b/pkg/tcpip/network/ipv4/ipv4.go
index 6c4f0ae3e..9ff27a363 100644
--- a/pkg/tcpip/network/ipv4/ipv4.go
+++ b/pkg/tcpip/network/ipv4/ipv4.go
@@ -173,9 +173,10 @@ func (e *endpoint) writePacketFragments(r *stack.Route, gso *stack.GSO, mtu int,
newPayload := pkt.Data.Clone(nil)
newPayload.CapLength(innerMTU)
if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, &stack.PacketBuffer{
- Header: pkt.Header,
- Data: newPayload,
- NetworkHeader: buffer.View(h),
+ Header: pkt.Header,
+ Data: newPayload,
+ NetworkHeader: buffer.View(h),
+ NetworkProtocolNumber: header.IPv4ProtocolNumber,
}); err != nil {
return err
}
@@ -192,9 +193,10 @@ func (e *endpoint) writePacketFragments(r *stack.Route, gso *stack.GSO, mtu int,
newPayloadLength := outerMTU - pkt.Header.UsedLength()
newPayload.CapLength(newPayloadLength)
if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, &stack.PacketBuffer{
- Header: pkt.Header,
- Data: newPayload,
- NetworkHeader: buffer.View(h),
+ Header: pkt.Header,
+ Data: newPayload,
+ NetworkHeader: buffer.View(h),
+ NetworkProtocolNumber: header.IPv4ProtocolNumber,
}); err != nil {
return err
}
@@ -206,9 +208,10 @@ func (e *endpoint) writePacketFragments(r *stack.Route, gso *stack.GSO, mtu int,
startOfHdr.TrimBack(pkt.Header.UsedLength() - outerMTU)
emptyVV := buffer.NewVectorisedView(0, []buffer.View{})
if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, &stack.PacketBuffer{
- Header: startOfHdr,
- Data: emptyVV,
- NetworkHeader: buffer.View(h),
+ Header: startOfHdr,
+ Data: emptyVV,
+ NetworkHeader: buffer.View(h),
+ NetworkProtocolNumber: header.IPv4ProtocolNumber,
}); err != nil {
return err
}
@@ -249,10 +252,11 @@ func (e *endpoint) addIPHeader(r *stack.Route, hdr *buffer.Prependable, payloadS
func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.NetworkHeaderParams, pkt *stack.PacketBuffer) *tcpip.Error {
ip := e.addIPHeader(r, &pkt.Header, pkt.Data.Size(), params)
pkt.NetworkHeader = buffer.View(ip)
+ pkt.NetworkProtocolNumber = header.IPv4ProtocolNumber
- nicName := e.stack.FindNICNameFromID(e.NICID())
// iptables filtering. All packets that reach here are locally
// generated.
+ nicName := e.stack.FindNICNameFromID(e.NICID())
ipt := e.stack.IPTables()
if ok := ipt.Check(stack.Output, pkt, gso, r, "", nicName); !ok {
// iptables is telling us to drop the packet.
@@ -304,6 +308,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
for pkt := pkts.Front(); pkt != nil; {
ip := e.addIPHeader(r, &pkt.Header, pkt.Data.Size(), params)
pkt.NetworkHeader = buffer.View(ip)
+ pkt.NetworkProtocolNumber = header.IPv4ProtocolNumber
pkt = pkt.Next()
}
@@ -570,6 +575,7 @@ func (*protocol) Parse(pkt *stack.PacketBuffer) (proto tcpip.TransportProtocolNu
parseTransportHeader = false
}
+ pkt.NetworkProtocolNumber = header.IPv4ProtocolNumber
pkt.NetworkHeader = hdr
pkt.Data.TrimFront(len(hdr))
pkt.Data.CapLength(int(ipHdr.TotalLength()) - len(hdr))
diff --git a/pkg/tcpip/network/ipv4/ipv4_test.go b/pkg/tcpip/network/ipv4/ipv4_test.go
index ded97ac64..63e2c36c2 100644
--- a/pkg/tcpip/network/ipv4/ipv4_test.go
+++ b/pkg/tcpip/network/ipv4/ipv4_test.go
@@ -150,6 +150,9 @@ func compareFragments(t *testing.T, packets []*stack.PacketBuffer, sourcePacketI
if got, want := packet.Header.AvailableLength(), sourcePacketInfo.Header.AvailableLength()-header.IPv4MinimumSize; got != want {
t.Errorf("fragment #%d should have the same available space for prepending as source: got %d, want %d", i, got, want)
}
+ if got, want := packet.NetworkProtocolNumber, sourcePacketInfo.NetworkProtocolNumber; got != want {
+ t.Errorf("fragment #%d has wrong network protocol number: got %d, want %d", i, got, want)
+ }
if i < len(packets)-1 {
sourceCopy.SetFlagsFragmentOffset(sourceCopy.Flags()|header.IPv4FlagMoreFragments, offset)
} else {
@@ -285,7 +288,8 @@ func TestFragmentation(t *testing.T) {
source := &stack.PacketBuffer{
Header: hdr,
// Save the source payload because WritePacket will modify it.
- Data: payload.Clone(nil),
+ Data: payload.Clone(nil),
+ NetworkProtocolNumber: header.IPv4ProtocolNumber,
}
c := buildContext(t, nil, ft.mtu)
err := c.Route.WritePacket(ft.gso, stack.NetworkHeaderParams{
diff --git a/pkg/tcpip/network/ipv6/ipv6.go b/pkg/tcpip/network/ipv6/ipv6.go
index 4a0b53c45..d7d7fc611 100644
--- a/pkg/tcpip/network/ipv6/ipv6.go
+++ b/pkg/tcpip/network/ipv6/ipv6.go
@@ -117,6 +117,7 @@ func (e *endpoint) addIPHeader(r *stack.Route, hdr *buffer.Prependable, payloadS
func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.NetworkHeaderParams, pkt *stack.PacketBuffer) *tcpip.Error {
ip := e.addIPHeader(r, &pkt.Header, pkt.Data.Size(), params)
pkt.NetworkHeader = buffer.View(ip)
+ pkt.NetworkProtocolNumber = header.IPv6ProtocolNumber
if r.Loop&stack.PacketLoop != 0 {
// The inbound path expects the network header to still be in
@@ -152,6 +153,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
for pb := pkts.Front(); pb != nil; pb = pb.Next() {
ip := e.addIPHeader(r, &pb.Header, pb.Data.Size(), params)
pb.NetworkHeader = buffer.View(ip)
+ pb.NetworkProtocolNumber = header.IPv6ProtocolNumber
}
n, err := e.linkEP.WritePackets(r, gso, pkts, ProtocolNumber)
@@ -586,6 +588,7 @@ traverseExtensions:
}
ipHdr = header.IPv6(hdr)
+ pkt.NetworkProtocolNumber = header.IPv6ProtocolNumber
pkt.NetworkHeader = hdr
pkt.Data.TrimFront(len(hdr))
pkt.Data.CapLength(int(ipHdr.PayloadLength()))
diff --git a/pkg/tcpip/stack/packet_buffer.go b/pkg/tcpip/stack/packet_buffer.go
index 5d6865e35..9e871f968 100644
--- a/pkg/tcpip/stack/packet_buffer.go
+++ b/pkg/tcpip/stack/packet_buffer.go
@@ -62,6 +62,11 @@ type PacketBuffer struct {
NetworkHeader buffer.View
TransportHeader buffer.View
+ // NetworkProtocol is only valid when NetworkHeader is set.
+ // TODO(gvisor.dev/issue/3574): Remove the separately passed protocol
+ // numbers in registration APIs that take a PacketBuffer.
+ NetworkProtocolNumber tcpip.NetworkProtocolNumber
+
// Hash is the transport layer hash of this packet. A value of zero
// indicates no valid hash has been set.
Hash uint32
@@ -72,9 +77,8 @@ type PacketBuffer struct {
// The following fields are only set by the qdisc layer when the packet
// is added to a queue.
- EgressRoute *Route
- GSOOptions *GSO
- NetworkProtocolNumber tcpip.NetworkProtocolNumber
+ EgressRoute *Route
+ GSOOptions *GSO
// NatDone indicates if the packet has been manipulated as per NAT
// iptables rule.
diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go
index 8604c4259..4570e8969 100644
--- a/pkg/tcpip/stack/registration.go
+++ b/pkg/tcpip/stack/registration.go
@@ -249,8 +249,8 @@ type NetworkEndpoint interface {
MaxHeaderLength() uint16
// WritePacket writes a packet to the given destination address and
- // protocol. It takes ownership of pkt. pkt.TransportHeader must have already
- // been set.
+ // protocol. It takes ownership of pkt. pkt.TransportHeader must have
+ // already been set.
WritePacket(r *Route, gso *GSO, params NetworkHeaderParams, pkt *PacketBuffer) *tcpip.Error
// WritePackets writes packets to the given destination address and
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 05:53:40 +0000