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-rw-r--r--pkg/tcpip/network/arp/arp.go25
-rw-r--r--pkg/tcpip/network/ipv4/icmp.go40
-rw-r--r--pkg/tcpip/network/ipv4/ipv4.go32
-rw-r--r--pkg/tcpip/network/ipv6/icmp.go51
-rw-r--r--pkg/tcpip/network/ipv6/ipv6.go42
-rw-r--r--pkg/tcpip/network/ipv6/ndp.go2
6 files changed, 101 insertions, 91 deletions
diff --git a/pkg/tcpip/network/arp/arp.go b/pkg/tcpip/network/arp/arp.go
index b47a7be51..7df77c66e 100644
--- a/pkg/tcpip/network/arp/arp.go
+++ b/pkg/tcpip/network/arp/arp.go
@@ -49,7 +49,6 @@ type endpoint struct {
enabled uint32
nic stack.NetworkInterface
- linkEP stack.LinkEndpoint
linkAddrCache stack.LinkAddressCache
nud stack.NUDHandler
}
@@ -92,12 +91,12 @@ func (e *endpoint) DefaultTTL() uint8 {
}
func (e *endpoint) MTU() uint32 {
- lmtu := e.linkEP.MTU()
+ lmtu := e.nic.MTU()
return lmtu - uint32(e.MaxHeaderLength())
}
func (e *endpoint) MaxHeaderLength() uint16 {
- return e.linkEP.MaxHeaderLength() + header.ARPSize
+ return e.nic.MaxHeaderLength() + header.ARPSize
}
func (e *endpoint) Close() {
@@ -154,17 +153,25 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
e.nud.HandleProbe(remoteAddr, localAddr, ProtocolNumber, remoteLinkAddr, e.protocol)
}
- pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
- ReserveHeaderBytes: int(e.linkEP.MaxHeaderLength()) + header.ARPSize,
+ // As per RFC 826, under Packet Reception:
+ // Swap hardware and protocol fields, putting the local hardware and
+ // protocol addresses in the sender fields.
+ //
+ // Send the packet to the (new) target hardware address on the same
+ // hardware on which the request was received.
+ origSender := h.HardwareAddressSender()
+ r.RemoteLinkAddress = tcpip.LinkAddress(origSender)
+ respPkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
+ ReserveHeaderBytes: int(e.nic.MaxHeaderLength()) + header.ARPSize,
})
- packet := header.ARP(pkt.NetworkHeader().Push(header.ARPSize))
+ packet := header.ARP(respPkt.NetworkHeader().Push(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.HardwareAddressTarget(), origSender)
copy(packet.ProtocolAddressTarget(), h.ProtocolAddressSender())
- _ = e.linkEP.WritePacket(r, nil /* gso */, ProtocolNumber, pkt)
+ _ = e.nic.WritePacket(r, nil /* gso */, ProtocolNumber, respPkt)
case header.ARPReply:
addr := tcpip.Address(h.ProtocolAddressSender())
@@ -207,7 +214,6 @@ func (p *protocol) NewEndpoint(nic stack.NetworkInterface, linkAddrCache stack.L
e := &endpoint{
protocol: p,
nic: nic,
- linkEP: nic.LinkEndpoint(),
linkAddrCache: linkAddrCache,
nud: nud,
}
@@ -223,6 +229,7 @@ func (*protocol) LinkAddressProtocol() tcpip.NetworkProtocolNumber {
// LinkAddressRequest implements stack.LinkAddressResolver.LinkAddressRequest.
func (*protocol) LinkAddressRequest(addr, localAddr tcpip.Address, remoteLinkAddr tcpip.LinkAddress, linkEP stack.LinkEndpoint) *tcpip.Error {
r := &stack.Route{
+ NetProto: ProtocolNumber,
RemoteLinkAddress: remoteLinkAddr,
}
if len(r.RemoteLinkAddress) == 0 {
diff --git a/pkg/tcpip/network/ipv4/icmp.go b/pkg/tcpip/network/ipv4/icmp.go
index eab9a530c..3407755ed 100644
--- a/pkg/tcpip/network/ipv4/icmp.go
+++ b/pkg/tcpip/network/ipv4/icmp.go
@@ -102,8 +102,6 @@ func (e *endpoint) handleICMP(r *stack.Route, pkt *stack.PacketBuffer) {
e.dispatcher.DeliverTransportPacket(r, header.ICMPv4ProtocolNumber, pkt)
- remoteLinkAddr := r.RemoteLinkAddress
-
// As per RFC 1122 section 3.2.1.3, when a host sends any datagram, the IP
// source address MUST be one of its own IP addresses (but not a broadcast
// or multicast address).
@@ -119,9 +117,6 @@ func (e *endpoint) handleICMP(r *stack.Route, pkt *stack.PacketBuffer) {
}
defer r.Release()
- // Use the remote link address from the incoming packet.
- r.ResolveWith(remoteLinkAddr)
-
// TODO(gvisor.dev/issue/3810:) When adding protocol numbers into the
// header information, we may have to change this code to handle the
// ICMP header no longer being in the data buffer.
@@ -244,13 +239,7 @@ func (*icmpReasonProtoUnreachable) isICMPReason() {}
// the problematic packet. It incorporates as much of that packet as
// possible as well as any error metadata as is available. returnError
// expects pkt to hold a valid IPv4 packet as per the wire format.
-func returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tcpip.Error {
- sent := r.Stats().ICMP.V4PacketsSent
- if !r.Stack().AllowICMPMessage() {
- sent.RateLimited.Increment()
- return nil
- }
-
+func (p *protocol) returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tcpip.Error {
// We check we are responding only when we are allowed to.
// See RFC 1812 section 4.3.2.7 (shown below).
//
@@ -279,6 +268,25 @@ func returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tc
return nil
}
+ // Even if we were able to receive a packet from some remote, we may not have
+ // a route to it - the remote may be blocked via routing rules. We must always
+ // consult our routing table and find a route to the remote before sending any
+ // packet.
+ route, err := p.stack.FindRoute(r.NICID(), r.LocalAddress, r.RemoteAddress, ProtocolNumber, false /* multicastLoop */)
+ if err != nil {
+ return err
+ }
+ defer route.Release()
+ // From this point on, the incoming route should no longer be used; route
+ // must be used to send the ICMP error.
+ r = nil
+
+ sent := p.stack.Stats().ICMP.V4PacketsSent
+ if !p.stack.AllowICMPMessage() {
+ sent.RateLimited.Increment()
+ return nil
+ }
+
networkHeader := pkt.NetworkHeader().View()
transportHeader := pkt.TransportHeader().View()
@@ -329,11 +337,11 @@ func returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tc
// least 8 bytes of the payload must be included. Today linux and other
// systems implement the RFC 1812 definition and not the original
// requirement. We treat 8 bytes as the minimum but will try send more.
- mtu := int(r.MTU())
+ mtu := int(route.MTU())
if mtu > header.IPv4MinimumProcessableDatagramSize {
mtu = header.IPv4MinimumProcessableDatagramSize
}
- headerLen := int(r.MaxHeaderLength()) + header.ICMPv4MinimumSize
+ headerLen := int(route.MaxHeaderLength()) + header.ICMPv4MinimumSize
available := int(mtu) - headerLen
if available < header.IPv4MinimumSize+header.ICMPv4MinimumErrorPayloadSize {
@@ -378,11 +386,11 @@ func returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tc
icmpHdr.SetChecksum(header.ICMPv4Checksum(icmpHdr, icmpPkt.Data))
counter := sent.DstUnreachable
- if err := r.WritePacket(
+ if err := route.WritePacket(
nil, /* gso */
stack.NetworkHeaderParams{
Protocol: header.ICMPv4ProtocolNumber,
- TTL: r.DefaultTTL(),
+ TTL: route.DefaultTTL(),
TOS: stack.DefaultTOS,
},
icmpPkt,
diff --git a/pkg/tcpip/network/ipv4/ipv4.go b/pkg/tcpip/network/ipv4/ipv4.go
index 99274dd45..c5ac7b8b5 100644
--- a/pkg/tcpip/network/ipv4/ipv4.go
+++ b/pkg/tcpip/network/ipv4/ipv4.go
@@ -66,7 +66,6 @@ var _ stack.NetworkEndpoint = (*endpoint)(nil)
type endpoint struct {
nic stack.NetworkInterface
- linkEP stack.LinkEndpoint
dispatcher stack.TransportDispatcher
protocol *protocol
@@ -87,7 +86,6 @@ type endpoint struct {
func (p *protocol) NewEndpoint(nic stack.NetworkInterface, _ stack.LinkAddressCache, _ stack.NUDHandler, dispatcher stack.TransportDispatcher) stack.NetworkEndpoint {
e := &endpoint{
nic: nic,
- linkEP: nic.LinkEndpoint(),
dispatcher: dispatcher,
protocol: p,
}
@@ -178,21 +176,13 @@ func (e *endpoint) DefaultTTL() uint8 {
// MTU implements stack.NetworkEndpoint.MTU. It returns the link-layer MTU minus
// the network layer max header length.
func (e *endpoint) MTU() uint32 {
- return calculateMTU(e.linkEP.MTU())
+ return calculateMTU(e.nic.MTU())
}
// MaxHeaderLength returns the maximum length needed by ipv4 headers (and
// underlying protocols).
func (e *endpoint) MaxHeaderLength() uint16 {
- return e.linkEP.MaxHeaderLength() + header.IPv4MaximumHeaderSize
-}
-
-// GSOMaxSize returns the maximum GSO packet size.
-func (e *endpoint) GSOMaxSize() uint32 {
- if gso, ok := e.linkEP.(stack.GSOEndpoint); ok {
- return gso.GSOMaxSize()
- }
- return 0
+ return e.nic.MaxHeaderLength() + header.IPv4MaximumHeaderSize
}
// NetworkProtocolNumber implements stack.NetworkEndpoint.NetworkProtocolNumber.
@@ -210,7 +200,7 @@ func (e *endpoint) writePacketFragments(r *stack.Route, gso *stack.GSO, mtu uint
for {
fragPkt, more := buildNextFragment(&pf, networkHeader)
- if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, fragPkt); err != nil {
+ if err := e.nic.WritePacket(r, gso, ProtocolNumber, fragPkt); err != nil {
r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pf.RemainingFragmentCount() + 1))
return err
}
@@ -283,10 +273,10 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.Netw
if r.Loop&stack.PacketOut == 0 {
return nil
}
- if pkt.Size() > int(e.linkEP.MTU()) && (gso == nil || gso.Type == stack.GSONone) {
- return e.writePacketFragments(r, gso, e.linkEP.MTU(), pkt)
+ if pkt.Size() > int(e.nic.MTU()) && (gso == nil || gso.Type == stack.GSONone) {
+ return e.writePacketFragments(r, gso, e.nic.MTU(), pkt)
}
- if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
+ if err := e.nic.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
r.Stats().IP.OutgoingPacketErrors.Increment()
return err
}
@@ -316,7 +306,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
if len(dropped) == 0 && len(natPkts) == 0 {
// Fast path: If no packets are to be dropped then we can just invoke the
// faster WritePackets API directly.
- n, err := e.linkEP.WritePackets(r, gso, pkts, ProtocolNumber)
+ n, err := e.nic.WritePackets(r, gso, pkts, ProtocolNumber)
r.Stats().IP.PacketsSent.IncrementBy(uint64(n))
if err != nil {
r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pkts.Len() - n))
@@ -343,7 +333,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
continue
}
}
- if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
+ if err := e.nic.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
r.Stats().IP.PacketsSent.IncrementBy(uint64(n))
r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pkts.Len() - n - len(dropped)))
// Dropped packets aren't errors, so include them in
@@ -404,7 +394,7 @@ func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, pkt *stack.PacketBu
return nil
}
- if err := e.linkEP.WritePacket(r, nil /* gso */, ProtocolNumber, pkt); err != nil {
+ if err := e.nic.WritePacket(r, nil /* gso */, ProtocolNumber, pkt); err != nil {
r.Stats().IP.OutgoingPacketErrors.Increment()
return err
}
@@ -512,13 +502,13 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
// 3 (Port Unreachable), when the designated transport protocol
// (e.g., UDP) is unable to demultiplex the datagram but has no
// protocol mechanism to inform the sender.
- _ = returnError(r, &icmpReasonPortUnreachable{}, pkt)
+ _ = e.protocol.returnError(r, &icmpReasonPortUnreachable{}, pkt)
case stack.TransportPacketProtocolUnreachable:
// As per RFC: 1122 Section 3.2.2.1
// A host SHOULD generate Destination Unreachable messages with code:
// 2 (Protocol Unreachable), when the designated transport protocol
// is not supported
- _ = returnError(r, &icmpReasonProtoUnreachable{}, pkt)
+ _ = e.protocol.returnError(r, &icmpReasonProtoUnreachable{}, pkt)
default:
panic(fmt.Sprintf("unrecognized result from DeliverTransportPacket = %d", res))
}
diff --git a/pkg/tcpip/network/ipv6/icmp.go b/pkg/tcpip/network/ipv6/icmp.go
index 37c169a5d..7be35c78b 100644
--- a/pkg/tcpip/network/ipv6/icmp.go
+++ b/pkg/tcpip/network/ipv6/icmp.go
@@ -440,8 +440,6 @@ func (e *endpoint) handleICMP(r *stack.Route, pkt *stack.PacketBuffer, hasFragme
return
}
- remoteLinkAddr := r.RemoteLinkAddress
-
// As per RFC 4291 section 2.7, multicast addresses must not be used as
// source addresses in IPv6 packets.
localAddr := r.LocalAddress
@@ -456,9 +454,6 @@ func (e *endpoint) handleICMP(r *stack.Route, pkt *stack.PacketBuffer, hasFragme
}
defer r.Release()
- // Use the link address from the source of the original packet.
- r.ResolveWith(remoteLinkAddr)
-
replyPkt := stack.NewPacketBuffer(stack.PacketBufferOptions{
ReserveHeaderBytes: int(r.MaxHeaderLength()) + header.ICMPv6EchoMinimumSize,
Data: pkt.Data,
@@ -742,14 +737,7 @@ func (*icmpReasonPortUnreachable) isICMPReason() {}
// returnError takes an error descriptor and generates the appropriate ICMP
// error packet for IPv6 and sends it.
-func returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tcpip.Error {
- stats := r.Stats().ICMP
- sent := stats.V6PacketsSent
- if !r.Stack().AllowICMPMessage() {
- sent.RateLimited.Increment()
- return nil
- }
-
+func (p *protocol) returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tcpip.Error {
// Only send ICMP error if the address is not a multicast v6
// address and the source is not the unspecified address.
//
@@ -780,6 +768,26 @@ func returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tc
return nil
}
+ // Even if we were able to receive a packet from some remote, we may not have
+ // a route to it - the remote may be blocked via routing rules. We must always
+ // consult our routing table and find a route to the remote before sending any
+ // packet.
+ route, err := p.stack.FindRoute(r.NICID(), r.LocalAddress, r.RemoteAddress, ProtocolNumber, false /* multicastLoop */)
+ if err != nil {
+ return err
+ }
+ defer route.Release()
+ // From this point on, the incoming route should no longer be used; route
+ // must be used to send the ICMP error.
+ r = nil
+
+ stats := p.stack.Stats().ICMP
+ sent := stats.V6PacketsSent
+ if !p.stack.AllowICMPMessage() {
+ sent.RateLimited.Increment()
+ return nil
+ }
+
network, transport := pkt.NetworkHeader().View(), pkt.TransportHeader().View()
if pkt.TransportProtocolNumber == header.ICMPv6ProtocolNumber {
@@ -806,11 +814,11 @@ func returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tc
// packet that caused the error) as possible without making
// the error message packet exceed the minimum IPv6 MTU
// [IPv6].
- mtu := int(r.MTU())
+ mtu := int(route.MTU())
if mtu > header.IPv6MinimumMTU {
mtu = header.IPv6MinimumMTU
}
- headerLen := int(r.MaxHeaderLength()) + header.ICMPv6ErrorHeaderSize
+ headerLen := int(route.MaxHeaderLength()) + header.ICMPv6ErrorHeaderSize
available := int(mtu) - headerLen
if available < header.IPv6MinimumSize {
return nil
@@ -843,9 +851,16 @@ func returnError(r *stack.Route, reason icmpReason, pkt *stack.PacketBuffer) *tc
default:
panic(fmt.Sprintf("unsupported ICMP type %T", reason))
}
- icmpHdr.SetChecksum(header.ICMPv6Checksum(icmpHdr, r.LocalAddress, r.RemoteAddress, newPkt.Data))
- err := r.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: header.ICMPv6ProtocolNumber, TTL: r.DefaultTTL(), TOS: stack.DefaultTOS}, newPkt)
- if err != nil {
+ icmpHdr.SetChecksum(header.ICMPv6Checksum(icmpHdr, route.LocalAddress, route.RemoteAddress, newPkt.Data))
+ if err := route.WritePacket(
+ nil, /* gso */
+ stack.NetworkHeaderParams{
+ Protocol: header.ICMPv6ProtocolNumber,
+ TTL: route.DefaultTTL(),
+ TOS: stack.DefaultTOS,
+ },
+ newPkt,
+ ); err != nil {
sent.Dropped.Increment()
return err
}
diff --git a/pkg/tcpip/network/ipv6/ipv6.go b/pkg/tcpip/network/ipv6/ipv6.go
index 826342c4f..2bd8f4ece 100644
--- a/pkg/tcpip/network/ipv6/ipv6.go
+++ b/pkg/tcpip/network/ipv6/ipv6.go
@@ -66,7 +66,6 @@ var _ NDPEndpoint = (*endpoint)(nil)
type endpoint struct {
nic stack.NetworkInterface
- linkEP stack.LinkEndpoint
linkAddrCache stack.LinkAddressCache
nud stack.NUDHandler
dispatcher stack.TransportDispatcher
@@ -364,21 +363,13 @@ func (e *endpoint) DefaultTTL() uint8 {
// MTU implements stack.NetworkEndpoint.MTU. It returns the link-layer MTU minus
// the network layer max header length.
func (e *endpoint) MTU() uint32 {
- return calculateMTU(e.linkEP.MTU())
+ return calculateMTU(e.nic.MTU())
}
// MaxHeaderLength returns the maximum length needed by ipv6 headers (and
// underlying protocols).
func (e *endpoint) MaxHeaderLength() uint16 {
- return e.linkEP.MaxHeaderLength() + header.IPv6MinimumSize
-}
-
-// GSOMaxSize returns the maximum GSO packet size.
-func (e *endpoint) GSOMaxSize() uint32 {
- if gso, ok := e.linkEP.(stack.GSOEndpoint); ok {
- return gso.GSOMaxSize()
- }
- return 0
+ return e.nic.MaxHeaderLength() + header.IPv6MinimumSize
}
func (e *endpoint) addIPHeader(r *stack.Route, pkt *stack.PacketBuffer, params stack.NetworkHeaderParams) {
@@ -396,7 +387,7 @@ func (e *endpoint) addIPHeader(r *stack.Route, pkt *stack.PacketBuffer, params s
}
func (e *endpoint) packetMustBeFragmented(pkt *stack.PacketBuffer, gso *stack.GSO) bool {
- return pkt.Size() > int(e.linkEP.MTU()) && (gso == nil || gso.Type == stack.GSONone)
+ return pkt.Size() > int(e.nic.MTU()) && (gso == nil || gso.Type == stack.GSONone)
}
// handleFragments fragments pkt and calls the handler function on each
@@ -477,19 +468,19 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.Netw
}
if e.packetMustBeFragmented(pkt, gso) {
- sent, remain, err := e.handleFragments(r, gso, e.linkEP.MTU(), pkt, params.Protocol, func(fragPkt *stack.PacketBuffer) *tcpip.Error {
+ sent, remain, err := e.handleFragments(r, gso, e.nic.MTU(), pkt, params.Protocol, func(fragPkt *stack.PacketBuffer) *tcpip.Error {
// TODO(gvisor.dev/issue/3884): Evaluate whether we want to send each
// fragment one by one using WritePacket() (current strategy) or if we
// want to create a PacketBufferList from the fragments and feed it to
// WritePackets(). It'll be faster but cost more memory.
- return e.linkEP.WritePacket(r, gso, ProtocolNumber, fragPkt)
+ return e.nic.WritePacket(r, gso, ProtocolNumber, fragPkt)
})
r.Stats().IP.PacketsSent.IncrementBy(uint64(sent))
r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(remain))
return err
}
- if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
+ if err := e.nic.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
r.Stats().IP.OutgoingPacketErrors.Increment()
return err
}
@@ -511,7 +502,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
e.addIPHeader(r, pb, params)
if e.packetMustBeFragmented(pb, gso) {
current := pb
- _, _, err := e.handleFragments(r, gso, e.linkEP.MTU(), pb, params.Protocol, func(fragPkt *stack.PacketBuffer) *tcpip.Error {
+ _, _, err := e.handleFragments(r, gso, e.nic.MTU(), pb, params.Protocol, func(fragPkt *stack.PacketBuffer) *tcpip.Error {
// Modify the packet list in place with the new fragments.
pkts.InsertAfter(current, fragPkt)
current = current.Next()
@@ -536,7 +527,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
if len(dropped) == 0 && len(natPkts) == 0 {
// Fast path: If no packets are to be dropped then we can just invoke the
// faster WritePackets API directly.
- n, err := e.linkEP.WritePackets(r, gso, pkts, ProtocolNumber)
+ n, err := e.nic.WritePackets(r, gso, pkts, ProtocolNumber)
r.Stats().IP.PacketsSent.IncrementBy(uint64(n))
if err != nil {
r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pkts.Len() - n))
@@ -563,7 +554,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
continue
}
}
- if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
+ if err := e.nic.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
r.Stats().IP.PacketsSent.IncrementBy(uint64(n))
r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pkts.Len() - n + len(dropped)))
// Dropped packets aren't errors, so include them in
@@ -643,7 +634,7 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
// As per RFC 8200 section 4.1, the Hop By Hop extension header is
// restricted to appear immediately after an IPv6 fixed header.
if previousHeaderStart != 0 {
- _ = returnError(r, &icmpReasonParameterProblem{
+ _ = e.protocol.returnError(r, &icmpReasonParameterProblem{
code: header.ICMPv6UnknownHeader,
pointer: previousHeaderStart,
}, pkt)
@@ -682,7 +673,7 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
// ICMP Parameter Problem, Code 2, message to the packet's
// Source Address, pointing to the unrecognized Option Type.
//
- _ = returnError(r, &icmpReasonParameterProblem{
+ _ = e.protocol.returnError(r, &icmpReasonParameterProblem{
code: header.ICMPv6UnknownOption,
pointer: it.ParseOffset() + optsIt.OptionOffset(),
respondToMulticast: true,
@@ -707,7 +698,7 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
// header, so we just make sure Segments Left is zero before processing
// the next extension header.
if extHdr.SegmentsLeft() != 0 {
- _ = returnError(r, &icmpReasonParameterProblem{
+ _ = e.protocol.returnError(r, &icmpReasonParameterProblem{
code: header.ICMPv6ErroneousHeader,
pointer: it.ParseOffset(),
}, pkt)
@@ -859,7 +850,7 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
// ICMP Parameter Problem, Code 2, message to the packet's
// Source Address, pointing to the unrecognized Option Type.
//
- _ = returnError(r, &icmpReasonParameterProblem{
+ _ = e.protocol.returnError(r, &icmpReasonParameterProblem{
code: header.ICMPv6UnknownOption,
pointer: it.ParseOffset() + optsIt.OptionOffset(),
respondToMulticast: true,
@@ -896,7 +887,7 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
// message with Code 4 in response to a packet for which the
// transport protocol (e.g., UDP) has no listener, if that transport
// protocol has no alternative means to inform the sender.
- _ = returnError(r, &icmpReasonPortUnreachable{}, pkt)
+ _ = e.protocol.returnError(r, &icmpReasonPortUnreachable{}, pkt)
case stack.TransportPacketProtocolUnreachable:
// As per RFC 8200 section 4. (page 7):
// Extension headers are numbered from IANA IP Protocol Numbers
@@ -917,7 +908,7 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
//
// Which when taken together indicate that an unknown protocol should
// be treated as an unrecognized next header value.
- _ = returnError(r, &icmpReasonParameterProblem{
+ _ = e.protocol.returnError(r, &icmpReasonParameterProblem{
code: header.ICMPv6UnknownHeader,
pointer: it.ParseOffset(),
}, pkt)
@@ -927,7 +918,7 @@ func (e *endpoint) HandlePacket(r *stack.Route, pkt *stack.PacketBuffer) {
}
default:
- _ = returnError(r, &icmpReasonParameterProblem{
+ _ = e.protocol.returnError(r, &icmpReasonParameterProblem{
code: header.ICMPv6UnknownHeader,
pointer: it.ParseOffset(),
}, pkt)
@@ -1302,7 +1293,6 @@ func (*protocol) ParseAddresses(v buffer.View) (src, dst tcpip.Address) {
func (p *protocol) NewEndpoint(nic stack.NetworkInterface, linkAddrCache stack.LinkAddressCache, nud stack.NUDHandler, dispatcher stack.TransportDispatcher) stack.NetworkEndpoint {
e := &endpoint{
nic: nic,
- linkEP: nic.LinkEndpoint(),
linkAddrCache: linkAddrCache,
nud: nud,
dispatcher: dispatcher,
diff --git a/pkg/tcpip/network/ipv6/ndp.go b/pkg/tcpip/network/ipv6/ndp.go
index 48a4c65e3..40da011f8 100644
--- a/pkg/tcpip/network/ipv6/ndp.go
+++ b/pkg/tcpip/network/ipv6/ndp.go
@@ -1289,7 +1289,7 @@ func (ndp *ndpState) generateSLAACAddr(prefix tcpip.Subnet, state *slaacPrefixSt
//
// TODO(b/141011931): Validate a LinkEndpoint's link address (provided by
// LinkEndpoint.LinkAddress) before reaching this point.
- linkAddr := ndp.ep.linkEP.LinkAddress()
+ linkAddr := ndp.ep.nic.LinkAddress()
if !header.IsValidUnicastEthernetAddress(linkAddr) {
return false
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 22:32:41 +0000