Merge release-20210510.0-36-g600d14f83 (automated)

2 files changed, 0 insertions, 34 deletions

diff --git a/pkg/sentry/socket/hostinet/stack.go b/pkg/sentry/socket/hostinet/stack.go
index 393a1ab3a..cbb1e905d 100644
--- a/pkg/sentry/socket/hostinet/stack.go
+++ b/pkg/sentry/socket/hostinet/stack.go
@@ -35,8 +35,6 @@ import (
 	"gvisor.dev/gvisor/pkg/syserr"
 	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/tcpip"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
@@ -66,8 +64,6 @@ type Stack struct {
 	tcpSACKEnabled bool
 	netDevFile     *os.File
 	netSNMPFile    *os.File
-	ipv4Forwarding bool
-	ipv6Forwarding bool
 }
 
 // NewStack returns an empty Stack containing no configuration.
@@ -127,13 +123,6 @@ func (s *Stack) Configure() error {
 		s.netSNMPFile = f
 	}
 
-	s.ipv6Forwarding = false
-	if ipForwarding, err := ioutil.ReadFile("/proc/sys/net/ipv6/conf/all/forwarding"); err == nil {
-		s.ipv6Forwarding = strings.TrimSpace(string(ipForwarding)) != "0"
-	} else {
-		log.Warningf("Failed to read if ipv6 forwarding is enabled, setting to false")
-	}
-
 	return nil
 }
 
@@ -492,19 +481,6 @@ func (s *Stack) CleanupEndpoints() []stack.TransportEndpoint { return nil }
 // RestoreCleanupEndpoints implements inet.Stack.RestoreCleanupEndpoints.
 func (s *Stack) RestoreCleanupEndpoints([]stack.TransportEndpoint) {}
 
-// Forwarding implements inet.Stack.Forwarding.
-func (s *Stack) Forwarding(protocol tcpip.NetworkProtocolNumber) bool {
-	switch protocol {
-	case ipv4.ProtocolNumber:
-		return s.ipv4Forwarding
-	case ipv6.ProtocolNumber:
-		return s.ipv6Forwarding
-	default:
-		log.Warningf("Forwarding(%v) failed: unsupported protocol", protocol)
-		return false
-	}
-}
-
 // SetForwarding implements inet.Stack.SetForwarding.
 func (s *Stack) SetForwarding(tcpip.NetworkProtocolNumber, bool) error {
 	return syserror.EACCES
diff --git a/pkg/sentry/socket/netstack/stack.go b/pkg/sentry/socket/netstack/stack.go
index 9cc1c57d7..eef5e6519 100644
--- a/pkg/sentry/socket/netstack/stack.go
+++ b/pkg/sentry/socket/netstack/stack.go
@@ -458,16 +458,6 @@ func (s *Stack) RestoreCleanupEndpoints(es []stack.TransportEndpoint) {
 	s.Stack.RestoreCleanupEndpoints(es)
 }
 
-// Forwarding implements inet.Stack.Forwarding.
-func (s *Stack) Forwarding(protocol tcpip.NetworkProtocolNumber) bool {
-	switch protocol {
-	case ipv4.ProtocolNumber, ipv6.ProtocolNumber:
-		return s.Stack.Forwarding(protocol)
-	default:
-		panic(fmt.Sprintf("Forwarding(%v) failed: unsupported protocol", protocol))
-	}
-}
-
 // SetForwarding implements inet.Stack.SetForwarding.
 func (s *Stack) SetForwarding(protocol tcpip.NetworkProtocolNumber, enable bool) error {
 	if err := s.Stack.SetForwardingDefaultAndAllNICs(protocol, enable); err != nil {