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-rw-r--r--pkg/sentry/socket/netstack/BUILD1
-rw-r--r--pkg/sentry/socket/netstack/stack.go24
2 files changed, 25 insertions, 0 deletions
diff --git a/pkg/sentry/socket/netstack/BUILD b/pkg/sentry/socket/netstack/BUILD
index bf5ec4558..b6da24820 100644
--- a/pkg/sentry/socket/netstack/BUILD
+++ b/pkg/sentry/socket/netstack/BUILD
@@ -44,6 +44,7 @@ go_library(
"//pkg/syserr",
"//pkg/tcpip",
"//pkg/tcpip/header",
+ "//pkg/tcpip/link/dummy",
"//pkg/tcpip/link/tun",
"//pkg/tcpip/network/ipv4",
"//pkg/tcpip/network/ipv6",
diff --git a/pkg/sentry/socket/netstack/stack.go b/pkg/sentry/socket/netstack/stack.go
index 3fceb4cd5..360b270c1 100644
--- a/pkg/sentry/socket/netstack/stack.go
+++ b/pkg/sentry/socket/netstack/stack.go
@@ -24,6 +24,7 @@ import (
"gvisor.dev/gvisor/pkg/syserr"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/header"
+ "gvisor.dev/gvisor/pkg/tcpip/link/dummy"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
"gvisor.dev/gvisor/pkg/tcpip/stack"
@@ -71,6 +72,17 @@ func (s *Stack) Interfaces() map[int32]inet.Interface {
return is
}
+func (s *Stack) AddDummyInterface(name string) (int32, error) {
+ var idx tcpip.NICID = s.nextInterfaceIndex()
+
+ dummyEP := dummy.New()
+ if err := s.Stack.CreateNICWithOptions(idx, dummyEP, stack.NICOptions{Name: name}); err != nil {
+ return -1, syserr.TranslateNetstackError(err).ToError()
+ }
+
+ return int32(idx), nil
+}
+
// RemoveInterface implements inet.Stack.RemoveInterface.
func (s *Stack) RemoveInterface(idx int32) error {
nic := tcpip.NICID(idx)
@@ -146,6 +158,18 @@ func convertAddr(addr inet.InterfaceAddr) (tcpip.ProtocolAddress, error) {
return protocolAddress, nil
}
+func (s *Stack) nextInterfaceIndex() tcpip.NICID {
+ var maxIdx tcpip.NICID = 0
+
+ for id, _ := range s.Stack.NICInfo() {
+ if id > maxIdx {
+ maxIdx = id
+ }
+ }
+
+ return maxIdx + 1
+}
+
// AddInterfaceAddr implements inet.Stack.AddInterfaceAddr.
func (s *Stack) AddInterfaceAddr(idx int32, addr inet.InterfaceAddr) error {
protocolAddress, err := convertAddr(addr)