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-rw-r--r--pkg/tcpip/buffer/prependable.go6
-rwxr-xr-xpkg/tcpip/link/channel/channel.go42
-rw-r--r--pkg/tcpip/link/fdbased/endpoint.go21
-rw-r--r--pkg/tcpip/link/loopback/loopback.go30
-rw-r--r--pkg/tcpip/link/sniffer/sniffer.go33
-rw-r--r--pkg/tcpip/network/arp/arp.go26
-rw-r--r--pkg/tcpip/network/ipv4/icmp.go6
-rw-r--r--pkg/tcpip/network/ipv4/ipv4.go116
-rw-r--r--pkg/tcpip/network/ipv6/icmp.go13
-rw-r--r--pkg/tcpip/network/ipv6/ipv6.go16
-rwxr-xr-xpkg/tcpip/packet_buffer.go21
-rwxr-xr-xpkg/tcpip/packet_buffer_state.go1
-rwxr-xr-xpkg/tcpip/stack/ndp.go4
-rw-r--r--pkg/tcpip/stack/nic.go6
-rw-r--r--pkg/tcpip/stack/registration.go17
-rw-r--r--pkg/tcpip/stack/route.go12
-rw-r--r--pkg/tcpip/stack/stack.go6
-rwxr-xr-xpkg/tcpip/tcpip_state_autogen.go2
-rw-r--r--pkg/tcpip/transport/icmp/endpoint.go12
-rw-r--r--pkg/tcpip/transport/raw/endpoint.go9
-rw-r--r--pkg/tcpip/transport/tcp/connect.go5
-rw-r--r--pkg/tcpip/transport/udp/endpoint.go5
-rw-r--r--pkg/tcpip/transport/udp/protocol.go10
23 files changed, 248 insertions, 171 deletions
diff --git a/pkg/tcpip/buffer/prependable.go b/pkg/tcpip/buffer/prependable.go
index 48a2a2713..ba21f4eca 100644
--- a/pkg/tcpip/buffer/prependable.go
+++ b/pkg/tcpip/buffer/prependable.go
@@ -77,3 +77,9 @@ func (p *Prependable) Prepend(size int) []byte {
p.usedIdx -= size
return p.View()[:size:size]
}
+
+// DeepCopy copies p and the bytes backing it.
+func (p Prependable) DeepCopy() Prependable {
+ p.buf = append(View(nil), p.buf...)
+ return p
+}
diff --git a/pkg/tcpip/link/channel/channel.go b/pkg/tcpip/link/channel/channel.go
index 22eefb564..9fe8e9f9d 100755
--- a/pkg/tcpip/link/channel/channel.go
+++ b/pkg/tcpip/link/channel/channel.go
@@ -25,10 +25,9 @@ import (
// PacketInfo holds all the information about an outbound packet.
type PacketInfo struct {
- Header buffer.View
- Payload buffer.View
- Proto tcpip.NetworkProtocolNumber
- GSO *stack.GSO
+ Pkt tcpip.PacketBuffer
+ Proto tcpip.NetworkProtocolNumber
+ GSO *stack.GSO
}
// Endpoint is link layer endpoint that stores outbound packets in a channel
@@ -118,12 +117,11 @@ func (e *Endpoint) LinkAddress() tcpip.LinkAddress {
}
// WritePacket stores outbound packets into the channel.
-func (e *Endpoint) WritePacket(_ *stack.Route, gso *stack.GSO, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) *tcpip.Error {
+func (e *Endpoint) WritePacket(_ *stack.Route, gso *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt tcpip.PacketBuffer) *tcpip.Error {
p := PacketInfo{
- Header: hdr.View(),
- Proto: protocol,
- Payload: payload.ToView(),
- GSO: gso,
+ Pkt: pkt,
+ Proto: protocol,
+ GSO: gso,
}
select {
@@ -139,15 +137,16 @@ func (e *Endpoint) WritePackets(_ *stack.Route, gso *stack.GSO, hdrs []stack.Pac
payloadView := payload.ToView()
n := 0
packetLoop:
- for i := range hdrs {
- hdr := &hdrs[i].Hdr
- off := hdrs[i].Off
- size := hdrs[i].Size
+ for _, hdr := range hdrs {
+ off := hdr.Off
+ size := hdr.Size
p := PacketInfo{
- Header: hdr.View(),
- Proto: protocol,
- Payload: buffer.NewViewFromBytes(payloadView[off : off+size]),
- GSO: gso,
+ Pkt: tcpip.PacketBuffer{
+ Header: hdr.Hdr,
+ Data: buffer.NewViewFromBytes(payloadView[off : off+size]).ToVectorisedView(),
+ },
+ Proto: protocol,
+ GSO: gso,
}
select {
@@ -162,12 +161,11 @@ packetLoop:
}
// WriteRawPacket implements stack.LinkEndpoint.WriteRawPacket.
-func (e *Endpoint) WriteRawPacket(packet buffer.VectorisedView) *tcpip.Error {
+func (e *Endpoint) WriteRawPacket(vv buffer.VectorisedView) *tcpip.Error {
p := PacketInfo{
- Header: packet.ToView(),
- Proto: 0,
- Payload: buffer.View{},
- GSO: nil,
+ Pkt: tcpip.PacketBuffer{Data: vv},
+ Proto: 0,
+ GSO: nil,
}
select {
diff --git a/pkg/tcpip/link/fdbased/endpoint.go b/pkg/tcpip/link/fdbased/endpoint.go
index edef7db26..98109c5dc 100644
--- a/pkg/tcpip/link/fdbased/endpoint.go
+++ b/pkg/tcpip/link/fdbased/endpoint.go
@@ -386,10 +386,11 @@ const (
// WritePacket writes outbound packets to the file descriptor. If it is not
// currently writable, the packet is dropped.
-func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) *tcpip.Error {
+func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt tcpip.PacketBuffer) *tcpip.Error {
if e.hdrSize > 0 {
// Add ethernet header if needed.
- eth := header.Ethernet(hdr.Prepend(header.EthernetMinimumSize))
+ eth := header.Ethernet(pkt.Header.Prepend(header.EthernetMinimumSize))
+ pkt.LinkHeader = buffer.View(eth)
ethHdr := &header.EthernetFields{
DstAddr: r.RemoteLinkAddress,
Type: protocol,
@@ -408,13 +409,13 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prepen
vnetHdr := virtioNetHdr{}
vnetHdrBuf := vnetHdrToByteSlice(&vnetHdr)
if gso != nil {
- vnetHdr.hdrLen = uint16(hdr.UsedLength())
+ vnetHdr.hdrLen = uint16(pkt.Header.UsedLength())
if gso.NeedsCsum {
vnetHdr.flags = _VIRTIO_NET_HDR_F_NEEDS_CSUM
vnetHdr.csumStart = header.EthernetMinimumSize + gso.L3HdrLen
vnetHdr.csumOffset = gso.CsumOffset
}
- if gso.Type != stack.GSONone && uint16(payload.Size()) > gso.MSS {
+ if gso.Type != stack.GSONone && uint16(pkt.Data.Size()) > gso.MSS {
switch gso.Type {
case stack.GSOTCPv4:
vnetHdr.gsoType = _VIRTIO_NET_HDR_GSO_TCPV4
@@ -427,14 +428,14 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prepen
}
}
- return rawfile.NonBlockingWrite3(e.fds[0], vnetHdrBuf, hdr.View(), payload.ToView())
+ return rawfile.NonBlockingWrite3(e.fds[0], vnetHdrBuf, pkt.Header.View(), pkt.Data.ToView())
}
- if payload.Size() == 0 {
- return rawfile.NonBlockingWrite(e.fds[0], hdr.View())
+ if pkt.Data.Size() == 0 {
+ return rawfile.NonBlockingWrite(e.fds[0], pkt.Header.View())
}
- return rawfile.NonBlockingWrite3(e.fds[0], hdr.View(), payload.ToView(), nil)
+ return rawfile.NonBlockingWrite3(e.fds[0], pkt.Header.View(), pkt.Data.ToView(), nil)
}
// WritePackets writes outbound packets to the file descriptor. If it is not
@@ -555,8 +556,8 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, hdrs []stack.Pac
}
// WriteRawPacket implements stack.LinkEndpoint.WriteRawPacket.
-func (e *endpoint) WriteRawPacket(packet buffer.VectorisedView) *tcpip.Error {
- return rawfile.NonBlockingWrite(e.fds[0], packet.ToView())
+func (e *endpoint) WriteRawPacket(vv buffer.VectorisedView) *tcpip.Error {
+ return rawfile.NonBlockingWrite(e.fds[0], vv.ToView())
}
// InjectOutobund implements stack.InjectableEndpoint.InjectOutbound.
diff --git a/pkg/tcpip/link/loopback/loopback.go b/pkg/tcpip/link/loopback/loopback.go
index bc5d8a2f3..563a67188 100644
--- a/pkg/tcpip/link/loopback/loopback.go
+++ b/pkg/tcpip/link/loopback/loopback.go
@@ -76,16 +76,16 @@ func (*endpoint) Wait() {}
// WritePacket implements stack.LinkEndpoint.WritePacket. It delivers outbound
// packets to the network-layer dispatcher.
-func (e *endpoint) WritePacket(_ *stack.Route, _ *stack.GSO, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) *tcpip.Error {
- views := make([]buffer.View, 1, 1+len(payload.Views()))
- views[0] = hdr.View()
- views = append(views, payload.Views()...)
-
- // Because we're immediately turning around and writing the packet back to the
- // rx path, we intentionally don't preserve the remote and local link
- // addresses from the stack.Route we're passed.
+func (e *endpoint) WritePacket(_ *stack.Route, _ *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt tcpip.PacketBuffer) *tcpip.Error {
+ views := make([]buffer.View, 1, 1+len(pkt.Data.Views()))
+ views[0] = pkt.Header.View()
+ views = append(views, pkt.Data.Views()...)
+
+ // Because we're immediately turning around and writing the packet back
+ // to the rx path, we intentionally don't preserve the remote and local
+ // link addresses from the stack.Route we're passed.
e.dispatcher.DeliverNetworkPacket(e, "" /* remote */, "" /* local */, protocol, tcpip.PacketBuffer{
- Data: buffer.NewVectorisedView(len(views[0])+payload.Size(), views),
+ Data: buffer.NewVectorisedView(len(views[0])+pkt.Data.Size(), views),
})
return nil
@@ -97,17 +97,17 @@ func (e *endpoint) WritePackets(_ *stack.Route, _ *stack.GSO, hdrs []stack.Packe
}
// WriteRawPacket implements stack.LinkEndpoint.WriteRawPacket.
-func (e *endpoint) WriteRawPacket(packet buffer.VectorisedView) *tcpip.Error {
+func (e *endpoint) WriteRawPacket(vv buffer.VectorisedView) *tcpip.Error {
// Reject the packet if it's shorter than an ethernet header.
- if packet.Size() < header.EthernetMinimumSize {
+ if vv.Size() < header.EthernetMinimumSize {
return tcpip.ErrBadAddress
}
- // There should be an ethernet header at the beginning of packet.
- linkHeader := header.Ethernet(packet.First()[:header.EthernetMinimumSize])
- packet.TrimFront(len(linkHeader))
+ // There should be an ethernet header at the beginning of vv.
+ linkHeader := header.Ethernet(vv.First()[:header.EthernetMinimumSize])
+ vv.TrimFront(len(linkHeader))
e.dispatcher.DeliverNetworkPacket(e, "" /* remote */, "" /* local */, linkHeader.Type(), tcpip.PacketBuffer{
- Data: packet,
+ Data: vv,
LinkHeader: buffer.View(linkHeader),
})
diff --git a/pkg/tcpip/link/sniffer/sniffer.go b/pkg/tcpip/link/sniffer/sniffer.go
index d71a03cd2..122680e10 100644
--- a/pkg/tcpip/link/sniffer/sniffer.go
+++ b/pkg/tcpip/link/sniffer/sniffer.go
@@ -193,19 +193,19 @@ func (e *endpoint) GSOMaxSize() uint32 {
return 0
}
-func (e *endpoint) dumpPacket(gso *stack.GSO, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) {
+func (e *endpoint) dumpPacket(gso *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt tcpip.PacketBuffer) {
if atomic.LoadUint32(&LogPackets) == 1 && e.file == nil {
- logPacket("send", protocol, hdr.View(), gso)
+ logPacket("send", protocol, pkt.Header.View(), gso)
}
if e.file != nil && atomic.LoadUint32(&LogPacketsToFile) == 1 {
- hdrBuf := hdr.View()
- length := len(hdrBuf) + payload.Size()
+ hdrBuf := pkt.Header.View()
+ length := len(hdrBuf) + pkt.Data.Size()
if length > int(e.maxPCAPLen) {
length = int(e.maxPCAPLen)
}
buf := bytes.NewBuffer(make([]byte, 0, pcapPacketHeaderLen+length))
- if err := binary.Write(buf, binary.BigEndian, newPCAPPacketHeader(uint32(length), uint32(len(hdrBuf)+payload.Size()))); err != nil {
+ if err := binary.Write(buf, binary.BigEndian, newPCAPPacketHeader(uint32(length), uint32(len(hdrBuf)+pkt.Data.Size()))); err != nil {
panic(err)
}
if len(hdrBuf) > length {
@@ -215,7 +215,7 @@ func (e *endpoint) dumpPacket(gso *stack.GSO, hdr buffer.Prependable, payload bu
panic(err)
}
length -= len(hdrBuf)
- logVectorisedView(payload, length, buf)
+ logVectorisedView(pkt.Data, length, buf)
if _, err := e.file.Write(buf.Bytes()); err != nil {
panic(err)
}
@@ -225,9 +225,9 @@ func (e *endpoint) dumpPacket(gso *stack.GSO, hdr buffer.Prependable, payload bu
// WritePacket implements the stack.LinkEndpoint interface. It is called by
// higher-level protocols to write packets; it just logs the packet and
// forwards the request to the lower endpoint.
-func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) *tcpip.Error {
- e.dumpPacket(gso, hdr, payload, protocol)
- return e.lower.WritePacket(r, gso, hdr, payload, protocol)
+func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt tcpip.PacketBuffer) *tcpip.Error {
+ e.dumpPacket(gso, protocol, pkt)
+ return e.lower.WritePacket(r, gso, protocol, pkt)
}
// WritePackets implements the stack.LinkEndpoint interface. It is called by
@@ -236,32 +236,35 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prepen
func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, hdrs []stack.PacketDescriptor, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) (int, *tcpip.Error) {
view := payload.ToView()
for _, d := range hdrs {
- e.dumpPacket(gso, d.Hdr, buffer.NewVectorisedView(d.Size, []buffer.View{view[d.Off:][:d.Size]}), protocol)
+ e.dumpPacket(gso, protocol, tcpip.PacketBuffer{
+ Header: d.Hdr,
+ Data: view[d.Off:][:d.Size].ToVectorisedView(),
+ })
}
return e.lower.WritePackets(r, gso, hdrs, payload, protocol)
}
// WriteRawPacket implements stack.LinkEndpoint.WriteRawPacket.
-func (e *endpoint) WriteRawPacket(packet buffer.VectorisedView) *tcpip.Error {
+func (e *endpoint) WriteRawPacket(vv buffer.VectorisedView) *tcpip.Error {
if atomic.LoadUint32(&LogPackets) == 1 && e.file == nil {
logPacket("send", 0, buffer.View("[raw packet, no header available]"), nil /* gso */)
}
if e.file != nil && atomic.LoadUint32(&LogPacketsToFile) == 1 {
- length := packet.Size()
+ length := vv.Size()
if length > int(e.maxPCAPLen) {
length = int(e.maxPCAPLen)
}
buf := bytes.NewBuffer(make([]byte, 0, pcapPacketHeaderLen+length))
- if err := binary.Write(buf, binary.BigEndian, newPCAPPacketHeader(uint32(length), uint32(packet.Size()))); err != nil {
+ if err := binary.Write(buf, binary.BigEndian, newPCAPPacketHeader(uint32(length), uint32(vv.Size()))); err != nil {
panic(err)
}
- logVectorisedView(packet, length, buf)
+ logVectorisedView(vv, length, buf)
if _, err := e.file.Write(buf.Bytes()); err != nil {
panic(err)
}
}
- return e.lower.WriteRawPacket(packet)
+ return e.lower.WriteRawPacket(vv)
}
func logVectorisedView(vv buffer.VectorisedView, length int, buf *bytes.Buffer) {
diff --git a/pkg/tcpip/network/arp/arp.go b/pkg/tcpip/network/arp/arp.go
index 0ee509ebe..30aec9ba7 100644
--- a/pkg/tcpip/network/arp/arp.go
+++ b/pkg/tcpip/network/arp/arp.go
@@ -79,7 +79,7 @@ func (e *endpoint) MaxHeaderLength() uint16 {
func (e *endpoint) Close() {}
-func (e *endpoint) WritePacket(*stack.Route, *stack.GSO, buffer.Prependable, buffer.VectorisedView, stack.NetworkHeaderParams, stack.PacketLooping) *tcpip.Error {
+func (e *endpoint) WritePacket(*stack.Route, *stack.GSO, stack.NetworkHeaderParams, stack.PacketLooping, tcpip.PacketBuffer) *tcpip.Error {
return tcpip.ErrNotSupported
}
@@ -88,7 +88,7 @@ func (e *endpoint) WritePackets(*stack.Route, *stack.GSO, []stack.PacketDescript
return 0, tcpip.ErrNotSupported
}
-func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, payload buffer.VectorisedView, loop stack.PacketLooping) *tcpip.Error {
+func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, loop stack.PacketLooping, pkt tcpip.PacketBuffer) *tcpip.Error {
return tcpip.ErrNotSupported
}
@@ -106,14 +106,16 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt tcpip.PacketBuffer) {
return // we have no useful answer, ignore the request
}
hdr := buffer.NewPrependable(int(e.linkEP.MaxHeaderLength()) + header.ARPSize)
- pkt := header.ARP(hdr.Prepend(header.ARPSize))
- pkt.SetIPv4OverEthernet()
- pkt.SetOp(header.ARPReply)
- copy(pkt.HardwareAddressSender(), r.LocalLinkAddress[:])
- copy(pkt.ProtocolAddressSender(), h.ProtocolAddressTarget())
- copy(pkt.HardwareAddressTarget(), h.HardwareAddressSender())
- copy(pkt.ProtocolAddressTarget(), h.ProtocolAddressSender())
- e.linkEP.WritePacket(r, nil /* gso */, hdr, buffer.VectorisedView{}, ProtocolNumber)
+ packet := header.ARP(hdr.Prepend(header.ARPSize))
+ packet.SetIPv4OverEthernet()
+ packet.SetOp(header.ARPReply)
+ copy(packet.HardwareAddressSender(), r.LocalLinkAddress[:])
+ copy(packet.ProtocolAddressSender(), h.ProtocolAddressTarget())
+ copy(packet.HardwareAddressTarget(), h.HardwareAddressSender())
+ copy(packet.ProtocolAddressTarget(), h.ProtocolAddressSender())
+ e.linkEP.WritePacket(r, nil /* gso */, ProtocolNumber, tcpip.PacketBuffer{
+ Header: hdr,
+ })
fallthrough // also fill the cache from requests
case header.ARPReply:
addr := tcpip.Address(h.ProtocolAddressSender())
@@ -165,7 +167,9 @@ func (*protocol) LinkAddressRequest(addr, localAddr tcpip.Address, linkEP stack.
copy(h.ProtocolAddressSender(), localAddr)
copy(h.ProtocolAddressTarget(), addr)
- return linkEP.WritePacket(r, nil /* gso */, hdr, buffer.VectorisedView{}, ProtocolNumber)
+ return linkEP.WritePacket(r, nil /* gso */, ProtocolNumber, tcpip.PacketBuffer{
+ Header: hdr,
+ })
}
// ResolveStaticAddress implements stack.LinkAddressResolver.
diff --git a/pkg/tcpip/network/ipv4/icmp.go b/pkg/tcpip/network/ipv4/icmp.go
index ce771631c..32bf39e43 100644
--- a/pkg/tcpip/network/ipv4/icmp.go
+++ b/pkg/tcpip/network/ipv4/icmp.go
@@ -99,7 +99,11 @@ func (e *endpoint) handleICMP(r *stack.Route, pkt tcpip.PacketBuffer) {
pkt.SetChecksum(0)
pkt.SetChecksum(^header.Checksum(pkt, header.ChecksumVV(vv, 0)))
sent := stats.ICMP.V4PacketsSent
- if err := r.WritePacket(nil /* gso */, hdr, vv, stack.NetworkHeaderParams{Protocol: header.ICMPv4ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS}); err != nil {
+ if err := r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: header.ICMPv4ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ Data: vv,
+ TransportHeader: buffer.View(pkt),
+ }); err != nil {
sent.Dropped.Increment()
return
}
diff --git a/pkg/tcpip/network/ipv4/ipv4.go b/pkg/tcpip/network/ipv4/ipv4.go
index ac16c8add..040329a74 100644
--- a/pkg/tcpip/network/ipv4/ipv4.go
+++ b/pkg/tcpip/network/ipv4/ipv4.go
@@ -117,13 +117,14 @@ func (e *endpoint) GSOMaxSize() uint32 {
}
// writePacketFragments calls e.linkEP.WritePacket with each packet fragment to
-// write. It assumes that the IP header is entirely in hdr but does not assume
-// that only the IP header is in hdr. It assumes that the input packet's stated
-// length matches the length of the hdr+payload. mtu includes the IP header and
-// options. This does not support the DontFragment IP flag.
-func (e *endpoint) writePacketFragments(r *stack.Route, gso *stack.GSO, hdr buffer.Prependable, payload buffer.VectorisedView, mtu int) *tcpip.Error {
+// write. It assumes that the IP header is entirely in pkt.Header but does not
+// assume that only the IP header is in pkt.Header. It assumes that the input
+// packet's stated length matches the length of the header+payload. mtu
+// includes the IP header and options. This does not support the DontFragment
+// IP flag.
+func (e *endpoint) writePacketFragments(r *stack.Route, gso *stack.GSO, mtu int, pkt tcpip.PacketBuffer) *tcpip.Error {
// This packet is too big, it needs to be fragmented.
- ip := header.IPv4(hdr.View())
+ ip := header.IPv4(pkt.Header.View())
flags := ip.Flags()
// Update mtu to take into account the header, which will exist in all
@@ -137,62 +138,77 @@ func (e *endpoint) writePacketFragments(r *stack.Route, gso *stack.GSO, hdr buff
outerMTU := innerMTU + int(ip.HeaderLength())
offset := ip.FragmentOffset()
- originalAvailableLength := hdr.AvailableLength()
+ originalAvailableLength := pkt.Header.AvailableLength()
for i := 0; i < n; i++ {
// Where possible, the first fragment that is sent has the same
- // hdr.UsedLength() as the input packet. The link-layer endpoint may depends
- // on this for looking at, eg, L4 headers.
+ // pkt.Header.UsedLength() as the input packet. The link-layer
+ // endpoint may depend on this for looking at, eg, L4 headers.
h := ip
if i > 0 {
- hdr = buffer.NewPrependable(int(ip.HeaderLength()) + originalAvailableLength)
- h = header.IPv4(hdr.Prepend(int(ip.HeaderLength())))
+ pkt.Header = buffer.NewPrependable(int(ip.HeaderLength()) + originalAvailableLength)
+ h = header.IPv4(pkt.Header.Prepend(int(ip.HeaderLength())))
copy(h, ip[:ip.HeaderLength()])
}
if i != n-1 {
h.SetTotalLength(uint16(outerMTU))
h.SetFlagsFragmentOffset(flags|header.IPv4FlagMoreFragments, offset)
} else {
- h.SetTotalLength(uint16(h.HeaderLength()) + uint16(payload.Size()))
+ h.SetTotalLength(uint16(h.HeaderLength()) + uint16(pkt.Data.Size()))
h.SetFlagsFragmentOffset(flags, offset)
}
h.SetChecksum(0)
h.SetChecksum(^h.CalculateChecksum())
offset += uint16(innerMTU)
if i > 0 {
- newPayload := payload.Clone([]buffer.View{})
+ newPayload := pkt.Data.Clone(nil)
newPayload.CapLength(innerMTU)
- if err := e.linkEP.WritePacket(r, gso, hdr, newPayload, ProtocolNumber); err != nil {
+ if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, tcpip.PacketBuffer{
+ Header: pkt.Header,
+ Data: newPayload,
+ NetworkHeader: buffer.View(h),
+ }); err != nil {
return err
}
r.Stats().IP.PacketsSent.Increment()
- payload.TrimFront(newPayload.Size())
+ pkt.Data.TrimFront(newPayload.Size())
continue
}
- // Special handling for the first fragment because it comes from the hdr.
- if outerMTU >= hdr.UsedLength() {
- // This fragment can fit all of hdr and possibly some of payload, too.
- newPayload := payload.Clone([]buffer.View{})
- newPayloadLength := outerMTU - hdr.UsedLength()
+ // Special handling for the first fragment because it comes
+ // from the header.
+ if outerMTU >= pkt.Header.UsedLength() {
+ // This fragment can fit all of pkt.Header and possibly
+ // some of pkt.Data, too.
+ newPayload := pkt.Data.Clone(nil)
+ newPayloadLength := outerMTU - pkt.Header.UsedLength()
newPayload.CapLength(newPayloadLength)
- if err := e.linkEP.WritePacket(r, gso, hdr, newPayload, ProtocolNumber); err != nil {
+ if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, tcpip.PacketBuffer{
+ Header: pkt.Header,
+ Data: newPayload,
+ NetworkHeader: buffer.View(h),
+ }); err != nil {
return err
}
r.Stats().IP.PacketsSent.Increment()
- payload.TrimFront(newPayloadLength)
+ pkt.Data.TrimFront(newPayloadLength)
} else {
- // The fragment is too small to fit all of hdr.
- startOfHdr := hdr
- startOfHdr.TrimBack(hdr.UsedLength() - outerMTU)
+ // The fragment is too small to fit all of pkt.Header.
+ startOfHdr := pkt.Header
+ startOfHdr.TrimBack(pkt.Header.UsedLength() - outerMTU)
emptyVV := buffer.NewVectorisedView(0, []buffer.View{})
- if err := e.linkEP.WritePacket(r, gso, startOfHdr, emptyVV, ProtocolNumber); err != nil {
+ if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, tcpip.PacketBuffer{
+ Header: startOfHdr,
+ Data: emptyVV,
+ NetworkHeader: buffer.View(h),
+ }); err != nil {
return err
}
r.Stats().IP.PacketsSent.Increment()
- // Add the unused bytes of hdr into the payload that remains to be sent.
- restOfHdr := hdr.View()[outerMTU:]
+ // Add the unused bytes of pkt.Header into the pkt.Data
+ // that remains to be sent.
+ restOfHdr := pkt.Header.View()[outerMTU:]
tmp := buffer.NewVectorisedView(len(restOfHdr), []buffer.View{buffer.NewViewFromBytes(restOfHdr)})
- tmp.Append(payload)
- payload = tmp
+ tmp.Append(pkt.Data)
+ pkt.Data = tmp
}
}
return nil
@@ -222,17 +238,17 @@ func (e *endpoint) addIPHeader(r *stack.Route, hdr *buffer.Prependable, payloadS
}
// WritePacket writes a packet to the given destination address and protocol.
-func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prependable, payload buffer.VectorisedView, params stack.NetworkHeaderParams, loop stack.PacketLooping) *tcpip.Error {
- ip := e.addIPHeader(r, &hdr, payload.Size(), params)
+func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.NetworkHeaderParams, loop stack.PacketLooping, pkt tcpip.PacketBuffer) *tcpip.Error {
+ ip := e.addIPHeader(r, &pkt.Header, pkt.Data.Size(), params)
if loop&stack.PacketLoop != 0 {
- views := make([]buffer.View, 1, 1+len(payload.Views()))
- views[0] = hdr.View()
- views = append(views, payload.Views()...)
+ views := make([]buffer.View, 1, 1+len(pkt.Data.Views()))
+ views[0] = pkt.Header.View()
+ views = append(views, pkt.Data.Views()...)
loopedR := r.MakeLoopedRoute()
e.HandlePacket(&loopedR, tcpip.PacketBuffer{
- Data: buffer.NewVectorisedView(len(views[0])+payload.Size(), views),
+ Data: buffer.NewVectorisedView(len(views[0])+pkt.Data.Size(), views),
NetworkHeader: buffer.View(ip),
})
@@ -241,10 +257,10 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prepen
if loop&stack.PacketOut == 0 {
return nil
}
- if hdr.UsedLength()+payload.Size() > int(e.linkEP.MTU()) && (gso == nil || gso.Type == stack.GSONone) {
- return e.writePacketFragments(r, gso, hdr, payload, int(e.linkEP.MTU()))
+ if pkt.Header.UsedLength()+pkt.Data.Size() > int(e.linkEP.MTU()) && (gso == nil || gso.Type == stack.GSONone) {
+ return e.writePacketFragments(r, gso, int(e.linkEP.MTU()), pkt)
}
- if err := e.linkEP.WritePacket(r, gso, hdr, payload, ProtocolNumber); err != nil {
+ if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
return err
}
r.Stats().IP.PacketsSent.Increment()
@@ -270,16 +286,16 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, hdrs []stack.Pac
// WriteHeaderIncludedPacket writes a packet already containing a network
// header through the given route.
-func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, payload buffer.VectorisedView, loop stack.PacketLooping) *tcpip.Error {
+func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, loop stack.PacketLooping, pkt tcpip.PacketBuffer) *tcpip.Error {
// The packet already has an IP header, but there are a few required
// checks.
- ip := header.IPv4(payload.First())
- if !ip.IsValid(payload.Size()) {
+ ip := header.IPv4(pkt.Data.First())
+ if !ip.IsValid(pkt.Data.Size()) {
return tcpip.ErrInvalidOptionValue
}
// Always set the total length.
- ip.SetTotalLength(uint16(payload.Size()))
+ ip.SetTotalLength(uint16(pkt.Data.Size()))
// Set the source address when zero.
if ip.SourceAddress() == tcpip.Address(([]byte{0, 0, 0, 0})) {
@@ -293,7 +309,7 @@ func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, payload buffer.Vect
// Set the packet ID when zero.
if ip.ID() == 0 {
id := uint32(0)
- if payload.Size() > header.IPv4MaximumHeaderSize+8 {
+ if pkt.Data.Size() > header.IPv4MaximumHeaderSize+8 {
// Packets of 68 bytes or less are required by RFC 791 to not be
// fragmented, so we only assign ids to larger packets.
id = atomic.AddUint32(&e.protocol.ids[hashRoute(r, 0 /* protocol */, e.protocol.hashIV)%buckets], 1)
@@ -306,18 +322,18 @@ func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, payload buffer.Vect
ip.SetChecksum(^ip.CalculateChecksum())
if loop&stack.PacketLoop != 0 {
- e.HandlePacket(r, tcpip.PacketBuffer{
- Data: payload,
- NetworkHeader: buffer.View(ip),
- })
+ e.HandlePacket(r, pkt.Clone())
}
if loop&stack.PacketOut == 0 {
return nil
}
- hdr := buffer.NewPrependableFromView(payload.ToView())
r.Stats().IP.PacketsSent.Increment()
- return e.linkEP.WritePacket(r, nil /* gso */, hdr, buffer.VectorisedView{}, ProtocolNumber)
+
+ ip = ip[:ip.HeaderLength()]
+ pkt.Header = buffer.NewPrependableFromView(buffer.View(ip))
+ pkt.Data.TrimFront(int(ip.HeaderLength()))
+ return e.linkEP.WritePacket(r, nil /* gso */, ProtocolNumber, pkt)
}
// HandlePacket is called by the link layer when new ipv4 packets arrive for
diff --git a/pkg/tcpip/network/ipv6/icmp.go b/pkg/tcpip/network/ipv6/icmp.go
index 6629951c6..1c3410618 100644
--- a/pkg/tcpip/network/ipv6/icmp.go
+++ b/pkg/tcpip/network/ipv6/icmp.go
@@ -226,7 +226,9 @@ func (e *endpoint) handleICMP(r *stack.Route, netHeader buffer.View, pkt tcpip.P
//
// The IP Hop Limit field has a value of 255, i.e., the packet
// could not possibly have been forwarded by a router.
- if err := r.WritePacket(nil /* gso */, hdr, buffer.VectorisedView{}, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: header.NDPHopLimit, TOS: stack.DefaultTOS}); err != nil {
+ if err := r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: header.NDPHopLimit, TOS: stack.DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ }); err != nil {
sent.Dropped.Increment()
return
}
@@ -291,7 +293,10 @@ func (e *endpoint) handleICMP(r *stack.Route, netHeader buffer.View, pkt tcpip.P
copy(packet, h)
packet.SetType(header.ICMPv6EchoReply)
packet.SetChecksum(header.ICMPv6Checksum(packet, r.LocalAddress, r.RemoteAddress, pkt.Data))
- if err := r.WritePacket(nil /* gso */, hdr, pkt.Data, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS}); err != nil {
+ if err := r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ Data: pkt.Data,
+ }); err != nil {
sent.Dropped.Increment()
return
}
@@ -417,7 +422,9 @@ func (*protocol) LinkAddressRequest(addr, localAddr tcpip.Address, linkEP stack.
})
// TODO(stijlist): count this in ICMP stats.
- return linkEP.WritePacket(r, nil /* gso */, hdr, buffer.VectorisedView{}, ProtocolNumber)
+ return linkEP.WritePacket(r, nil /* gso */, ProtocolNumber, tcpip.PacketBuffer{
+ Header: hdr,
+ })
}
// ResolveStaticAddress implements stack.LinkAddressResolver.
diff --git a/pkg/tcpip/network/ipv6/ipv6.go b/pkg/tcpip/network/ipv6/ipv6.go
index 4cee848a1..8d1578ed9 100644
--- a/pkg/tcpip/network/ipv6/ipv6.go
+++ b/pkg/tcpip/network/ipv6/ipv6.go
@@ -112,17 +112,17 @@ func (e *endpoint) addIPHeader(r *stack.Route, hdr *buffer.Prependable, payloadS
}
// WritePacket writes a packet to the given destination address and protocol.
-func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prependable, payload buffer.VectorisedView, params stack.NetworkHeaderParams, loop stack.PacketLooping) *tcpip.Error {
- ip := e.addIPHeader(r, &hdr, payload.Size(), params)
+func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.NetworkHeaderParams, loop stack.PacketLooping, pkt tcpip.PacketBuffer) *tcpip.Error {
+ ip := e.addIPHeader(r, &pkt.Header, pkt.Data.Size(), params)
if loop&stack.PacketLoop != 0 {
- views := make([]buffer.View, 1, 1+len(payload.Views()))
- views[0] = hdr.View()
- views = append(views, payload.Views()...)
+ views := make([]buffer.View, 1, 1+len(pkt.Data.Views()))
+ views[0] = pkt.Header.View()
+ views = append(views, pkt.Data.Views()...)
loopedR := r.MakeLoopedRoute()
e.HandlePacket(&loopedR, tcpip.PacketBuffer{
- Data: buffer.NewVectorisedView(len(views[0])+payload.Size(), views),
+ Data: buffer.NewVectorisedView(len(views[0])+pkt.Data.Size(), views),
NetworkHeader: buffer.View(ip),
})
@@ -133,7 +133,7 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, hdr buffer.Prepen
}
r.Stats().IP.PacketsSent.Increment()
- return e.linkEP.WritePacket(r, gso, hdr, payload, ProtocolNumber)
+ return e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt)
}
// WritePackets implements stack.LinkEndpoint.WritePackets.
@@ -158,7 +158,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, hdrs []stack.Pac
// WriteHeaderIncludedPacker implements stack.NetworkEndpoint. It is not yet
// supported by IPv6.
-func (*endpoint) WriteHeaderIncludedPacket(r *stack.Route, payload buffer.VectorisedView, loop stack.PacketLooping) *tcpip.Error {
+func (*endpoint) WriteHeaderIncludedPacket(r *stack.Route, loop stack.PacketLooping, pkt tcpip.PacketBuffer) *tcpip.Error {
// TODO(b/119580726): Support IPv6 header-included packets.
return tcpip.ErrNotSupported
}
diff --git a/pkg/tcpip/packet_buffer.go b/pkg/tcpip/packet_buffer.go
index 10b04239d..695f7b188 100755
--- a/pkg/tcpip/packet_buffer.go
+++ b/pkg/tcpip/packet_buffer.go
@@ -31,12 +31,19 @@ type PacketBuffer struct {
// or otherwise modified.
Data buffer.VectorisedView
+ // Header holds the headers of outbound packets. As a packet is passed
+ // down the stack, each layer adds to Header.
+ Header buffer.Prependable
+
+ // These fields are used by both inbound and outbound packets. They
+ // typically overlap with the Data and Header fields.
+ //
// The bytes backing these views are immutable. Each field may be nil
// if either it has not been set yet or no such header exists (e.g.
// packets sent via loopback may not have a link header).
//
- // These fields may be Views into other Views. SR dosen't support this,
- // so deep copies are necessary in some cases.
+ // These fields may be Views into other slices (either Data or Header).
+ // SR dosen't support this, so deep copies are necessary in some cases.
LinkHeader buffer.View
NetworkHeader buffer.View
TransportHeader buffer.View
@@ -44,11 +51,9 @@ type PacketBuffer struct {
// Clone makes a copy of pk. It clones the Data field, which creates a new
// VectorisedView but does not deep copy the underlying bytes.
+//
+// Clone also does not deep copy any of its other fields.
func (pk PacketBuffer) Clone() PacketBuffer {
- return PacketBuffer{
- Data: pk.Data.Clone(nil),
- LinkHeader: pk.LinkHeader,
- NetworkHeader: pk.NetworkHeader,
- TransportHeader: pk.TransportHeader,
- }
+ pk.Data = pk.Data.Clone(nil)
+ return pk
}
diff --git a/pkg/tcpip/packet_buffer_state.go b/pkg/tcpip/packet_buffer_state.go
index 04c4cf136..ad3cc24fa 100755
--- a/pkg/tcpip/packet_buffer_state.go
+++ b/pkg/tcpip/packet_buffer_state.go
@@ -20,6 +20,7 @@ import "gvisor.dev/gvisor/pkg/tcpip/buffer"
func (pk *PacketBuffer) beforeSave() {
// Non-Data fields may be slices of the Data field. This causes
// problems for SR, so during save we make each header independent.
+ pk.Header = pk.Header.DeepCopy()
pk.LinkHeader = append(buffer.View(nil), pk.LinkHeader...)
pk.NetworkHeader = append(buffer.View(nil), pk.NetworkHeader...)
pk.TransportHeader = append(buffer.View(nil), pk.TransportHeader...)
diff --git a/pkg/tcpip/stack/ndp.go b/pkg/tcpip/stack/ndp.go
index 8357dca77..cfdd0496e 100755
--- a/pkg/tcpip/stack/ndp.go
+++ b/pkg/tcpip/stack/ndp.go
@@ -421,7 +421,9 @@ func (ndp *ndpState) doDuplicateAddressDetection(addr tcpip.Address, remaining u
pkt.SetChecksum(header.ICMPv6Checksum(pkt, r.LocalAddress, r.RemoteAddress, buffer.VectorisedView{}))
sent := r.Stats().ICMP.V6PacketsSent
- if err := r.WritePacket(nil, hdr, buffer.VectorisedView{}, NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: header.NDPHopLimit, TOS: DefaultTOS}); err != nil {
+ if err := r.WritePacket(nil, NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: header.NDPHopLimit, TOS: DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ }); err != nil {
sent.Dropped.Increment()
return false, err
}
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go
index 9ed9e1e7c..3f8d7312c 100644
--- a/pkg/tcpip/stack/nic.go
+++ b/pkg/tcpip/stack/nic.go
@@ -812,15 +812,15 @@ func (n *NIC) DeliverNetworkPacket(linkEP LinkEndpoint, remote, local tcpip.Link
} else {
// n doesn't have a destination endpoint.
// Send the packet out of n.
- hdr := buffer.NewPrependableFromView(pkt.Data.First())
+ pkt.Header = buffer.NewPrependableFromView(pkt.Data.First())
pkt.Data.RemoveFirst()
// TODO(b/128629022): use route.WritePacket.
- if err := n.linkEP.WritePacket(&r, nil /* gso */, hdr, pkt.Data, protocol); err != nil {
+ if err := n.linkEP.WritePacket(&r, nil /* gso */, protocol, pkt); err != nil {
r.Stats().IP.OutgoingPacketErrors.Increment()
} else {
n.stats.Tx.Packets.Increment()
- n.stats.Tx.Bytes.IncrementBy(uint64(hdr.UsedLength() + pkt.Data.Size()))
+ n.stats.Tx.Bytes.IncrementBy(uint64(pkt.Header.UsedLength() + pkt.Data.Size()))
}
}
return
diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go
index c0026f5a3..7fd4e4a65 100644
--- a/pkg/tcpip/stack/registration.go
+++ b/pkg/tcpip/stack/registration.go
@@ -232,8 +232,9 @@ type NetworkEndpoint interface {
MaxHeaderLength() uint16
// WritePacket writes a packet to the given destination address and
- // protocol.
- WritePacket(r *Route, gso *GSO, hdr buffer.Prependable, payload buffer.VectorisedView, params NetworkHeaderParams, loop PacketLooping) *tcpip.Error
+ // protocol. It sets pkt.NetworkHeader. pkt.TransportHeader must have
+ // already been set.
+ WritePacket(r *Route, gso *GSO, params NetworkHeaderParams, loop PacketLooping, pkt tcpip.PacketBuffer) *tcpip.Error
// WritePackets writes packets to the given destination address and
// protocol.
@@ -241,7 +242,7 @@ type NetworkEndpoint interface {
// WriteHeaderIncludedPacket writes a packet that includes a network
// header to the given destination address.
- WriteHeaderIncludedPacket(r *Route, payload buffer.VectorisedView, loop PacketLooping) *tcpip.Error
+ WriteHeaderIncludedPacket(r *Route, loop PacketLooping, pkt tcpip.PacketBuffer) *tcpip.Error
// ID returns the network protocol endpoint ID.
ID() *NetworkEndpointID
@@ -361,13 +362,15 @@ type LinkEndpoint interface {
// link endpoint.
LinkAddress() tcpip.LinkAddress
- // WritePacket writes a packet with the given protocol through the given
- // route.
+ // WritePacket writes a packet with the given protocol through the
+ // given route. It sets pkt.LinkHeader if a link layer header exists.
+ // pkt.NetworkHeader and pkt.TransportHeader must have already been
+ // set.
//
// To participate in transparent bridging, a LinkEndpoint implementation
// should call eth.Encode with header.EthernetFields.SrcAddr set to
// r.LocalLinkAddress if it is provided.
- WritePacket(r *Route, gso *GSO, hdr buffer.Prependable, payload buffer.VectorisedView, protocol tcpip.NetworkProtocolNumber) *tcpip.Error
+ WritePacket(r *Route, gso *GSO, protocol tcpip.NetworkProtocolNumber, pkt tcpip.PacketBuffer) *tcpip.Error
// WritePackets writes packets with the given protocol through the
// given route.
@@ -379,7 +382,7 @@ type LinkEndpoint interface {
// WriteRawPacket writes a packet directly to the link. The packet
// should already have an ethernet header.
- WriteRawPacket(packet buffer.VectorisedView) *tcpip.Error
+ WriteRawPacket(vv buffer.VectorisedView) *tcpip.Error
// Attach attaches the data link layer endpoint to the network-layer
// dispatcher of the stack.
diff --git a/pkg/tcpip/stack/route.go b/pkg/tcpip/stack/route.go
index 1a0a51b57..617f5a57c 100644
--- a/pkg/tcpip/stack/route.go
+++ b/pkg/tcpip/stack/route.go
@@ -154,17 +154,17 @@ func (r *Route) IsResolutionRequired() bool {
}
// WritePacket writes the packet through the given route.
-func (r *Route) WritePacket(gso *GSO, hdr buffer.Prependable, payload buffer.VectorisedView, params NetworkHeaderParams) *tcpip.Error {
+func (r *Route) WritePacket(gso *GSO, params NetworkHeaderParams, pkt tcpip.PacketBuffer) *tcpip.Error {
if !r.ref.isValidForOutgoing() {
return tcpip.ErrInvalidEndpointState
}
- err := r.ref.ep.WritePacket(r, gso, hdr, payload, params, r.Loop)
+ err := r.ref.ep.WritePacket(r, gso, params, r.Loop, pkt)
if err != nil {
r.Stats().IP.OutgoingPacketErrors.Increment()
} else {
r.ref.nic.stats.Tx.Packets.Increment()
- r.ref.nic.stats.Tx.Bytes.IncrementBy(uint64(hdr.UsedLength() + payload.Size()))
+ r.ref.nic.stats.Tx.Bytes.IncrementBy(uint64(pkt.Header.UsedLength() + pkt.Data.Size()))
}
return err
}
@@ -209,17 +209,17 @@ func (r *Route) WritePackets(gso *GSO, hdrs []PacketDescriptor, payload buffer.V
// WriteHeaderIncludedPacket writes a packet already containing a network
// header through the given route.
-func (r *Route) WriteHeaderIncludedPacket(payload buffer.VectorisedView) *tcpip.Error {
+func (r *Route) WriteHeaderIncludedPacket(pkt tcpip.PacketBuffer) *tcpip.Error {
if !r.ref.isValidForOutgoing() {
return tcpip.ErrInvalidEndpointState
}
- if err := r.ref.ep.WriteHeaderIncludedPacket(r, payload, r.Loop); err != nil {
+ if err := r.ref.ep.WriteHeaderIncludedPacket(r, r.Loop, pkt); err != nil {
r.Stats().IP.OutgoingPacketErrors.Increment()
return err
}
r.ref.nic.stats.Tx.Packets.Increment()
- r.ref.nic.stats.Tx.Bytes.IncrementBy(uint64(payload.Size()))
+ r.ref.nic.stats.Tx.Bytes.IncrementBy(uint64(pkt.Data.Size()))
return nil
}
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go
index 2f8d8e822..0e88643a4 100644
--- a/pkg/tcpip/stack/stack.go
+++ b/pkg/tcpip/stack/stack.go
@@ -1366,10 +1366,10 @@ func (s *Stack) WritePacket(nicID tcpip.NICID, dst tcpip.LinkAddress, netProto t
}
fakeHeader := make(header.Ethernet, header.EthernetMinimumSize)
fakeHeader.Encode(&ethFields)
- ethHeader := buffer.View(fakeHeader).ToVectorisedView()
- ethHeader.Append(payload)
+ vv := buffer.View(fakeHeader).ToVectorisedView()
+ vv.Append(payload)
- if err := nic.linkEP.WriteRawPacket(ethHeader); err != nil {
+ if err := nic.linkEP.WriteRawPacket(vv); err != nil {
return err
}
diff --git a/pkg/tcpip/tcpip_state_autogen.go b/pkg/tcpip/tcpip_state_autogen.go
index d8d56e79b..11eb1703a 100755
--- a/pkg/tcpip/tcpip_state_autogen.go
+++ b/pkg/tcpip/tcpip_state_autogen.go
@@ -9,6 +9,7 @@ import (
func (x *PacketBuffer) save(m state.Map) {
x.beforeSave()
m.Save("Data", &x.Data)
+ m.Save("Header", &x.Header)
m.Save("LinkHeader", &x.LinkHeader)
m.Save("NetworkHeader", &x.NetworkHeader)
m.Save("TransportHeader", &x.TransportHeader)
@@ -17,6 +18,7 @@ func (x *PacketBuffer) save(m state.Map) {
func (x *PacketBuffer) afterLoad() {}
func (x *PacketBuffer) load(m state.Map) {
m.Load("Data", &x.Data)
+ m.Load("Header", &x.Header)
m.Load("LinkHeader", &x.LinkHeader)
m.Load("NetworkHeader", &x.NetworkHeader)
m.Load("TransportHeader", &x.TransportHeader)
diff --git a/pkg/tcpip/transport/icmp/endpoint.go b/pkg/tcpip/transport/icmp/endpoint.go
index 70e008d36..9c40931b5 100644
--- a/pkg/tcpip/transport/icmp/endpoint.go
+++ b/pkg/tcpip/transport/icmp/endpoint.go
@@ -429,7 +429,11 @@ func send4(r *stack.Route, ident uint16, data buffer.View, ttl uint8) *tcpip.Err
if ttl == 0 {
ttl = r.DefaultTTL()
}
- return r.WritePacket(nil /* gso */, hdr, data.ToVectorisedView(), stack.NetworkHeaderParams{Protocol: header.ICMPv4ProtocolNumber, TTL: ttl, TOS: stack.DefaultTOS})
+ return r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: header.ICMPv4ProtocolNumber, TTL: ttl, TOS: stack.DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ Data: data.ToVectorisedView(),
+ TransportHeader: buffer.View(icmpv4),
+ })
}
func send6(r *stack.Route, ident uint16, data buffer.View, ttl uint8) *tcpip.Error {
@@ -455,7 +459,11 @@ func send6(r *stack.Route, ident uint16, data buffer.View, ttl uint8) *tcpip.Err
if ttl == 0 {
ttl = r.DefaultTTL()
}
- return r.WritePacket(nil /* gso */, hdr, dataVV, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: ttl, TOS: stack.DefaultTOS})
+ return r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: ttl, TOS: stack.DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ Data: dataVV,
+ TransportHeader: buffer.View(icmpv6),
+ })
}
func (e *endpoint) checkV4Mapped(addr *tcpip.FullAddress, allowMismatch bool) (tcpip.NetworkProtocolNumber, *tcpip.Error) {
diff --git a/pkg/tcpip/transport/raw/endpoint.go b/pkg/tcpip/transport/raw/endpoint.go
index 230a1537a..5aafe2615 100644
--- a/pkg/tcpip/transport/raw/endpoint.go
+++ b/pkg/tcpip/transport/raw/endpoint.go
@@ -338,13 +338,18 @@ func (e *endpoint) finishWrite(payloadBytes []byte, route *stack.Route) (int64,
switch e.NetProto {
case header.IPv4ProtocolNumber:
if !e.associated {
- if err := route.WriteHeaderIncludedPacket(buffer.View(payloadBytes).ToVectorisedView()); err != nil {
+ if err := route.WriteHeaderIncludedPacket(tcpip.PacketBuffer{
+ Data: buffer.View(payloadBytes).ToVectorisedView(),
+ }); err != nil {
return 0, nil, err
}
break
}
hdr := buffer.NewPrependable(len(payloadBytes) + int(route.MaxHeaderLength()))
- if err := route.WritePacket(nil /* gso */, hdr, buffer.View(payloadBytes).ToVectorisedView(), stack.NetworkHeaderParams{Protocol: e.TransProto, TTL: route.DefaultTTL(), TOS: stack.DefaultTOS}); err != nil {
+ if err := route.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: e.TransProto, TTL: route.DefaultTTL(), TOS: stack.DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ Data: buffer.View(payloadBytes).ToVectorisedView(),
+ }); err != nil {
return 0, nil, err
}
diff --git a/pkg/tcpip/transport/tcp/connect.go b/pkg/tcpip/transport/tcp/connect.go
index be066d877..49f2b9685 100644
--- a/pkg/tcpip/transport/tcp/connect.go
+++ b/pkg/tcpip/transport/tcp/connect.go
@@ -723,7 +723,10 @@ func sendTCP(r *stack.Route, id stack.TransportEndpointID, data buffer.Vectorise
if ttl == 0 {
ttl = r.DefaultTTL()
}
- if err := r.WritePacket(gso, d.Hdr, data, stack.NetworkHeaderParams{Protocol: ProtocolNumber, TTL: ttl, TOS: tos}); err != nil {
+ if err := r.WritePacket(gso, stack.NetworkHeaderParams{Protocol: ProtocolNumber, TTL: ttl, TOS: tos}, tcpip.PacketBuffer{
+ Header: d.Hdr,
+ Data: data,
+ }); err != nil {
r.Stats().TCP.SegmentSendErrors.Increment()
return err
}
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index dda7af910..2d97d1398 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -817,7 +817,10 @@ func sendUDP(r *stack.Route, data buffer.VectorisedView, localPort, remotePort u
if useDefaultTTL {
ttl = r.DefaultTTL()
}
- if err := r.WritePacket(nil /* gso */, hdr, data, stack.NetworkHeaderParams{Protocol: ProtocolNumber, TTL: ttl, TOS: tos}); err != nil {
+ if err := r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: ProtocolNumber, TTL: ttl, TOS: tos}, tcpip.PacketBuffer{
+ Header: hdr,
+ Data: data,
+ }); err != nil {
r.Stats().UDP.PacketSendErrors.Increment()
return err
}
diff --git a/pkg/tcpip/transport/udp/protocol.go b/pkg/tcpip/transport/udp/protocol.go
index 43f11b700..259c3072a 100644
--- a/pkg/tcpip/transport/udp/protocol.go
+++ b/pkg/tcpip/transport/udp/protocol.go
@@ -135,7 +135,10 @@ func (p *protocol) HandleUnknownDestinationPacket(r *stack.Route, id stack.Trans
pkt.SetType(header.ICMPv4DstUnreachable)
pkt.SetCode(header.ICMPv4PortUnreachable)
pkt.SetChecksum(header.ICMPv4Checksum(pkt, payload))
- r.WritePacket(nil /* gso */, hdr, payload, stack.NetworkHeaderParams{Protocol: header.ICMPv4ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS})
+ r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: header.ICMPv4ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ Data: payload,
+ })
case header.IPv6AddressSize:
if !r.Stack().AllowICMPMessage() {
@@ -169,7 +172,10 @@ func (p *protocol) HandleUnknownDestinationPacket(r *stack.Route, id stack.Trans
pkt.SetType(header.ICMPv6DstUnreachable)
pkt.SetCode(header.ICMPv6PortUnreachable)
pkt.SetChecksum(header.ICMPv6Checksum(pkt, r.LocalAddress, r.RemoteAddress, payload))
- r.WritePacket(nil /* gso */, hdr, payload, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS})
+ r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS}, tcpip.PacketBuffer{
+ Header: hdr,
+ Data: payload,
+ })
}
return true
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 20:40:17 +0000