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Diffstat (limited to 'pkg/tcpip/stack/route.go')
-rw-r--r--pkg/tcpip/stack/route.go118
1 files changed, 70 insertions, 48 deletions
diff --git a/pkg/tcpip/stack/route.go b/pkg/tcpip/stack/route.go
index 2cbbf0de8..1b008a067 100644
--- a/pkg/tcpip/stack/route.go
+++ b/pkg/tcpip/stack/route.go
@@ -42,17 +42,27 @@ type Route struct {
// NetProto is the network-layer protocol.
NetProto tcpip.NetworkProtocolNumber
- // ref a reference to the network endpoint through which the route
- // starts.
- ref *referencedNetworkEndpoint
-
// Loop controls where WritePacket should send packets.
Loop PacketLooping
+
+ // nic is the NIC the route goes through.
+ nic *NIC
+
+ // addressEndpoint is the local address this route is associated with.
+ addressEndpoint AssignableAddressEndpoint
+
+ // linkCache is set if link address resolution is enabled for this protocol on
+ // the route's NIC.
+ linkCache LinkAddressCache
+
+ // linkRes is set if link address resolution is enabled for this protocol on
+ // the route's NIC.
+ linkRes LinkAddressResolver
}
// makeRoute initializes a new route. It takes ownership of the provided
-// reference to a network endpoint.
-func makeRoute(netProto tcpip.NetworkProtocolNumber, localAddr, remoteAddr tcpip.Address, localLinkAddr tcpip.LinkAddress, ref *referencedNetworkEndpoint, handleLocal, multicastLoop bool) Route {
+// AssignableAddressEndpoint.
+func makeRoute(netProto tcpip.NetworkProtocolNumber, localAddr, remoteAddr tcpip.Address, nic *NIC, addressEndpoint AssignableAddressEndpoint, handleLocal, multicastLoop bool) Route {
loop := PacketOut
if handleLocal && localAddr != "" && remoteAddr == localAddr {
loop = PacketLoop
@@ -62,29 +72,39 @@ func makeRoute(netProto tcpip.NetworkProtocolNumber, localAddr, remoteAddr tcpip
loop |= PacketLoop
}
- return Route{
+ r := Route{
NetProto: netProto,
LocalAddress: localAddr,
- LocalLinkAddress: localLinkAddr,
+ LocalLinkAddress: nic.linkEP.LinkAddress(),
RemoteAddress: remoteAddr,
- ref: ref,
+ addressEndpoint: addressEndpoint,
+ nic: nic,
Loop: loop,
}
+
+ if nic := r.nic; nic.linkEP.Capabilities()&CapabilityResolutionRequired != 0 {
+ if linkRes, ok := nic.stack.linkAddrResolvers[r.NetProto]; ok {
+ r.linkRes = linkRes
+ r.linkCache = nic.stack
+ }
+ }
+
+ return r
}
// NICID returns the id of the NIC from which this route originates.
func (r *Route) NICID() tcpip.NICID {
- return r.ref.ep.NICID()
+ return r.addressEndpoint.NetworkEndpoint().NICID()
}
// MaxHeaderLength forwards the call to the network endpoint's implementation.
func (r *Route) MaxHeaderLength() uint16 {
- return r.ref.ep.MaxHeaderLength()
+ return r.addressEndpoint.NetworkEndpoint().MaxHeaderLength()
}
// Stats returns a mutable copy of current stats.
func (r *Route) Stats() tcpip.Stats {
- return r.ref.nic.stack.Stats()
+ return r.nic.stack.Stats()
}
// PseudoHeaderChecksum forwards the call to the network endpoint's
@@ -95,12 +115,12 @@ func (r *Route) PseudoHeaderChecksum(protocol tcpip.TransportProtocolNumber, tot
// Capabilities returns the link-layer capabilities of the route.
func (r *Route) Capabilities() LinkEndpointCapabilities {
- return r.ref.ep.Capabilities()
+ return r.addressEndpoint.NetworkEndpoint().Capabilities()
}
// GSOMaxSize returns the maximum GSO packet size.
func (r *Route) GSOMaxSize() uint32 {
- if gso, ok := r.ref.ep.(GSOEndpoint); ok {
+ if gso, ok := r.addressEndpoint.NetworkEndpoint().(GSOEndpoint); ok {
return gso.GSOMaxSize()
}
return 0
@@ -138,8 +158,8 @@ func (r *Route) Resolve(waker *sleep.Waker) (<-chan struct{}, *tcpip.Error) {
nextAddr = r.RemoteAddress
}
- if r.ref.nic.neigh != nil {
- entry, ch, err := r.ref.nic.neigh.entry(nextAddr, r.LocalAddress, r.ref.linkRes, waker)
+ if neigh := r.nic.neigh; neigh != nil {
+ entry, ch, err := neigh.entry(nextAddr, r.LocalAddress, r.linkRes, waker)
if err != nil {
return ch, err
}
@@ -147,7 +167,7 @@ func (r *Route) Resolve(waker *sleep.Waker) (<-chan struct{}, *tcpip.Error) {
return nil, nil
}
- linkAddr, ch, err := r.ref.linkCache.GetLinkAddress(r.ref.nic.ID(), nextAddr, r.LocalAddress, r.NetProto, waker)
+ linkAddr, ch, err := r.linkCache.GetLinkAddress(r.nic.ID(), nextAddr, r.LocalAddress, r.NetProto, waker)
if err != nil {
return ch, err
}
@@ -162,12 +182,12 @@ func (r *Route) RemoveWaker(waker *sleep.Waker) {
nextAddr = r.RemoteAddress
}
- if r.ref.nic.neigh != nil {
- r.ref.nic.neigh.removeWaker(nextAddr, waker)
+ if neigh := r.nic.neigh; neigh != nil {
+ neigh.removeWaker(nextAddr, waker)
return
}
- r.ref.linkCache.RemoveWaker(r.ref.nic.ID(), nextAddr, waker)
+ r.linkCache.RemoveWaker(r.nic.ID(), nextAddr, waker)
}
// IsResolutionRequired returns true if Resolve() must be called to resolve
@@ -175,27 +195,27 @@ func (r *Route) RemoveWaker(waker *sleep.Waker) {
//
// The NIC r uses must not be locked.
func (r *Route) IsResolutionRequired() bool {
- if r.ref.nic.neigh != nil {
- return r.ref.isValidForOutgoing() && r.ref.linkRes != nil && r.RemoteLinkAddress == ""
+ if r.nic.neigh != nil {
+ return r.nic.isValidForOutgoing(r.addressEndpoint) && r.linkRes != nil && r.RemoteLinkAddress == ""
}
- return r.ref.isValidForOutgoing() && r.ref.linkCache != nil && r.RemoteLinkAddress == ""
+ return r.nic.isValidForOutgoing(r.addressEndpoint) && r.linkCache != nil && r.RemoteLinkAddress == ""
}
// WritePacket writes the packet through the given route.
func (r *Route) WritePacket(gso *GSO, params NetworkHeaderParams, pkt *PacketBuffer) *tcpip.Error {
- if !r.ref.isValidForOutgoing() {
+ if !r.nic.isValidForOutgoing(r.addressEndpoint) {
return tcpip.ErrInvalidEndpointState
}
// WritePacket takes ownership of pkt, calculate numBytes first.
numBytes := pkt.Size()
- err := r.ref.ep.WritePacket(r, gso, params, pkt)
+ err := r.addressEndpoint.NetworkEndpoint().WritePacket(r, gso, params, 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(numBytes))
+ r.nic.stats.Tx.Packets.Increment()
+ r.nic.stats.Tx.Bytes.IncrementBy(uint64(numBytes))
}
return err
}
@@ -203,76 +223,75 @@ func (r *Route) WritePacket(gso *GSO, params NetworkHeaderParams, pkt *PacketBuf
// WritePackets writes a list of n packets through the given route and returns
// the number of packets written.
func (r *Route) WritePackets(gso *GSO, pkts PacketBufferList, params NetworkHeaderParams) (int, *tcpip.Error) {
- if !r.ref.isValidForOutgoing() {
+ if !r.nic.isValidForOutgoing(r.addressEndpoint) {
return 0, tcpip.ErrInvalidEndpointState
}
// WritePackets takes ownership of pkt, calculate length first.
numPkts := pkts.Len()
- n, err := r.ref.ep.WritePackets(r, gso, pkts, params)
+ n, err := r.addressEndpoint.NetworkEndpoint().WritePackets(r, gso, pkts, params)
if err != nil {
r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(numPkts - n))
}
- r.ref.nic.stats.Tx.Packets.IncrementBy(uint64(n))
+ r.nic.stats.Tx.Packets.IncrementBy(uint64(n))
writtenBytes := 0
for i, pb := 0, pkts.Front(); i < n && pb != nil; i, pb = i+1, pb.Next() {
writtenBytes += pb.Size()
}
- r.ref.nic.stats.Tx.Bytes.IncrementBy(uint64(writtenBytes))
+ r.nic.stats.Tx.Bytes.IncrementBy(uint64(writtenBytes))
return n, err
}
// WriteHeaderIncludedPacket writes a packet already containing a network
// header through the given route.
func (r *Route) WriteHeaderIncludedPacket(pkt *PacketBuffer) *tcpip.Error {
- if !r.ref.isValidForOutgoing() {
+ if !r.nic.isValidForOutgoing(r.addressEndpoint) {
return tcpip.ErrInvalidEndpointState
}
// WriteHeaderIncludedPacket takes ownership of pkt, calculate numBytes first.
numBytes := pkt.Data.Size()
- if err := r.ref.ep.WriteHeaderIncludedPacket(r, pkt); err != nil {
+ if err := r.addressEndpoint.NetworkEndpoint().WriteHeaderIncludedPacket(r, 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(numBytes))
+ r.nic.stats.Tx.Packets.Increment()
+ r.nic.stats.Tx.Bytes.IncrementBy(uint64(numBytes))
return nil
}
// DefaultTTL returns the default TTL of the underlying network endpoint.
func (r *Route) DefaultTTL() uint8 {
- return r.ref.ep.DefaultTTL()
+ return r.addressEndpoint.NetworkEndpoint().DefaultTTL()
}
// MTU returns the MTU of the underlying network endpoint.
func (r *Route) MTU() uint32 {
- return r.ref.ep.MTU()
+ return r.addressEndpoint.NetworkEndpoint().MTU()
}
// NetworkProtocolNumber returns the NetworkProtocolNumber of the underlying
// network endpoint.
func (r *Route) NetworkProtocolNumber() tcpip.NetworkProtocolNumber {
- return r.ref.ep.NetworkProtocolNumber()
+ return r.addressEndpoint.NetworkEndpoint().NetworkProtocolNumber()
}
// Release frees all resources associated with the route.
func (r *Route) Release() {
- if r.ref != nil {
- r.ref.decRef()
- r.ref = nil
+ if r.addressEndpoint != nil {
+ r.addressEndpoint.DecRef()
+ r.addressEndpoint = nil
}
}
-// Clone Clone a route such that the original one can be released and the new
-// one will remain valid.
+// Clone clones the route.
func (r *Route) Clone() Route {
- if r.ref != nil {
- r.ref.incRef()
+ if r.addressEndpoint != nil {
+ _ = r.addressEndpoint.IncRef()
}
return *r
}
@@ -296,7 +315,7 @@ func (r *Route) MakeLoopedRoute() Route {
// Stack returns the instance of the Stack that owns this route.
func (r *Route) Stack() *Stack {
- return r.ref.stack()
+ return r.nic.stack
}
func (r *Route) isV4Broadcast(addr tcpip.Address) bool {
@@ -304,7 +323,7 @@ func (r *Route) isV4Broadcast(addr tcpip.Address) bool {
return true
}
- subnet := r.ref.addrWithPrefix().Subnet()
+ subnet := r.addressEndpoint.AddressWithPrefix().Subnet()
return subnet.IsBroadcast(addr)
}
@@ -330,7 +349,10 @@ func (r *Route) ReverseRoute(src tcpip.Address, dst tcpip.Address) Route {
LocalLinkAddress: r.RemoteLinkAddress,
RemoteAddress: src,
RemoteLinkAddress: r.LocalLinkAddress,
- ref: r.ref,
Loop: r.Loop,
+ addressEndpoint: r.addressEndpoint,
+ nic: r.nic,
+ linkCache: r.linkCache,
+ linkRes: r.linkRes,
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 01:01:09 +0000