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-rw-r--r--pkg/tcpip/stack/nic.go18
-rw-r--r--pkg/tcpip/stack/stack.go24
-rw-r--r--pkg/tcpip/stack/stack_test.go7
3 files changed, 23 insertions, 26 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go
index 5726c3642..4144d5d0f 100644
--- a/pkg/tcpip/stack/nic.go
+++ b/pkg/tcpip/stack/nic.go
@@ -27,11 +27,10 @@ import (
// NIC represents a "network interface card" to which the networking stack is
// attached.
type NIC struct {
- stack *Stack
- id tcpip.NICID
- name string
- linkEP LinkEndpoint
- loopback bool
+ stack *Stack
+ id tcpip.NICID
+ name string
+ linkEP LinkEndpoint
mu sync.RWMutex
spoofing bool
@@ -85,7 +84,7 @@ const (
)
// newNIC returns a new NIC using the default NDP configurations from stack.
-func newNIC(stack *Stack, id tcpip.NICID, name string, ep LinkEndpoint, loopback bool) *NIC {
+func newNIC(stack *Stack, id tcpip.NICID, name string, ep LinkEndpoint) *NIC {
// TODO(b/141011931): Validate a LinkEndpoint (ep) is valid. For
// example, make sure that the link address it provides is a valid
// unicast ethernet address.
@@ -99,7 +98,6 @@ func newNIC(stack *Stack, id tcpip.NICID, name string, ep LinkEndpoint, loopback
id: id,
name: name,
linkEP: ep,
- loopback: loopback,
primary: make(map[tcpip.NetworkProtocolNumber][]*referencedNetworkEndpoint),
endpoints: make(map[NetworkEndpointID]*referencedNetworkEndpoint),
mcastJoins: make(map[NetworkEndpointID]int32),
@@ -175,7 +173,7 @@ func (n *NIC) enable() *tcpip.Error {
}
// Do not auto-generate an IPv6 link-local address for loopback devices.
- if !n.stack.autoGenIPv6LinkLocal || n.loopback {
+ if !n.stack.autoGenIPv6LinkLocal || n.isLoopback() {
return nil
}
@@ -240,6 +238,10 @@ func (n *NIC) isPromiscuousMode() bool {
return rv
}
+func (n *NIC) isLoopback() bool {
+ return n.linkEP.Capabilities()&CapabilityLoopback != 0
+}
+
// setSpoofing enables or disables address spoofing.
func (n *NIC) setSpoofing(enable bool) {
n.mu.Lock()
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go
index 583ede3e5..807f910f6 100644
--- a/pkg/tcpip/stack/stack.go
+++ b/pkg/tcpip/stack/stack.go
@@ -798,7 +798,7 @@ func (s *Stack) NewPacketEndpoint(cooked bool, netProto tcpip.NetworkProtocolNum
// createNIC creates a NIC with the provided id and link-layer endpoint, and
// optionally enable it.
-func (s *Stack) createNIC(id tcpip.NICID, name string, ep LinkEndpoint, enabled, loopback bool) *tcpip.Error {
+func (s *Stack) createNIC(id tcpip.NICID, name string, ep LinkEndpoint, enabled bool) *tcpip.Error {
s.mu.Lock()
defer s.mu.Unlock()
@@ -807,7 +807,7 @@ func (s *Stack) createNIC(id tcpip.NICID, name string, ep LinkEndpoint, enabled,
return tcpip.ErrDuplicateNICID
}
- n := newNIC(s, id, name, ep, loopback)
+ n := newNIC(s, id, name, ep)
s.nics[id] = n
if enabled {
@@ -819,32 +819,26 @@ func (s *Stack) createNIC(id tcpip.NICID, name string, ep LinkEndpoint, enabled,
// CreateNIC creates a NIC with the provided id and link-layer endpoint.
func (s *Stack) CreateNIC(id tcpip.NICID, ep LinkEndpoint) *tcpip.Error {
- return s.createNIC(id, "", ep, true, false)
+ return s.createNIC(id, "", ep, true)
}
// CreateNamedNIC creates a NIC with the provided id and link-layer endpoint,
// and a human-readable name.
func (s *Stack) CreateNamedNIC(id tcpip.NICID, name string, ep LinkEndpoint) *tcpip.Error {
- return s.createNIC(id, name, ep, true, false)
-}
-
-// CreateNamedLoopbackNIC creates a NIC with the provided id and link-layer
-// endpoint, and a human-readable name.
-func (s *Stack) CreateNamedLoopbackNIC(id tcpip.NICID, name string, ep LinkEndpoint) *tcpip.Error {
- return s.createNIC(id, name, ep, true, true)
+ return s.createNIC(id, name, ep, true)
}
// CreateDisabledNIC creates a NIC with the provided id and link-layer endpoint,
// but leave it disable. Stack.EnableNIC must be called before the link-layer
// endpoint starts delivering packets to it.
func (s *Stack) CreateDisabledNIC(id tcpip.NICID, ep LinkEndpoint) *tcpip.Error {
- return s.createNIC(id, "", ep, false, false)
+ return s.createNIC(id, "", ep, false)
}
// CreateDisabledNamedNIC is a combination of CreateNamedNIC and
// CreateDisabledNIC.
func (s *Stack) CreateDisabledNamedNIC(id tcpip.NICID, name string, ep LinkEndpoint) *tcpip.Error {
- return s.createNIC(id, name, ep, false, false)
+ return s.createNIC(id, name, ep, false)
}
// EnableNIC enables the given NIC so that the link-layer endpoint can start
@@ -911,7 +905,7 @@ func (s *Stack) NICInfo() map[tcpip.NICID]NICInfo {
Up: true, // Netstack interfaces are always up.
Running: nic.linkEP.IsAttached(),
Promiscuous: nic.isPromiscuousMode(),
- Loopback: nic.linkEP.Capabilities()&CapabilityLoopback != 0,
+ Loopback: nic.isLoopback(),
}
nics[id] = NICInfo{
Name: nic.name,
@@ -1072,7 +1066,7 @@ func (s *Stack) FindRoute(id tcpip.NICID, localAddr, remoteAddr tcpip.Address, n
if id != 0 && !needRoute {
if nic, ok := s.nics[id]; ok {
if ref := s.getRefEP(nic, localAddr, netProto); ref != nil {
- return makeRoute(netProto, ref.ep.ID().LocalAddress, remoteAddr, nic.linkEP.LinkAddress(), ref, s.handleLocal && !nic.loopback, multicastLoop && !nic.loopback), nil
+ return makeRoute(netProto, ref.ep.ID().LocalAddress, remoteAddr, nic.linkEP.LinkAddress(), ref, s.handleLocal && !nic.isLoopback(), multicastLoop && !nic.isLoopback()), nil
}
}
} else {
@@ -1088,7 +1082,7 @@ func (s *Stack) FindRoute(id tcpip.NICID, localAddr, remoteAddr tcpip.Address, n
remoteAddr = ref.ep.ID().LocalAddress
}
- r := makeRoute(netProto, ref.ep.ID().LocalAddress, remoteAddr, nic.linkEP.LinkAddress(), ref, s.handleLocal && !nic.loopback, multicastLoop && !nic.loopback)
+ r := makeRoute(netProto, ref.ep.ID().LocalAddress, remoteAddr, nic.linkEP.LinkAddress(), ref, s.handleLocal && !nic.isLoopback(), multicastLoop && !nic.isLoopback())
if needRoute {
r.NextHop = route.Gateway
}
diff --git a/pkg/tcpip/stack/stack_test.go b/pkg/tcpip/stack/stack_test.go
index d970a4abb..bf057745e 100644
--- a/pkg/tcpip/stack/stack_test.go
+++ b/pkg/tcpip/stack/stack_test.go
@@ -32,6 +32,7 @@ import (
"gvisor.dev/gvisor/pkg/tcpip/buffer"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/link/channel"
+ "gvisor.dev/gvisor/pkg/tcpip/link/loopback"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
@@ -2153,10 +2154,10 @@ func TestNoLinkLocalAutoGenForLoopbackNIC(t *testing.T) {
OpaqueIIDOpts: test.opaqueIIDOpts,
}
- e := channel.New(0, 1280, linkAddr1)
+ e := loopback.New()
s := stack.New(opts)
- if err := s.CreateNamedLoopbackNIC(nicID, nicName, e); err != nil {
- t.Fatalf("CreateNamedLoopbackNIC(%d, %q, _) = %s", nicID, nicName, err)
+ if err := s.CreateNamedNIC(nicID, nicName, e); err != nil {
+ t.Fatalf("CreateNamedNIC(%d, %q, _) = %s", nicID, nicName, err)
}
addr, err := s.GetMainNICAddress(nicID, header.IPv6ProtocolNumber)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 19:00:15 +0000