1 files changed, 5 insertions, 0 deletions
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 7010d1b68..825854148 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -68,6 +68,7 @@ func (e *Error) IgnoreStats() bool {
 var (
 	ErrUnknownProtocol       = &Error{msg: "unknown protocol"}
 	ErrUnknownNICID          = &Error{msg: "unknown nic id"}
+	ErrUnknownDevice         = &Error{msg: "unknown device"}
 	ErrUnknownProtocolOption = &Error{msg: "unknown option for protocol"}
 	ErrDuplicateNICID        = &Error{msg: "duplicate nic id"}
 	ErrDuplicateAddress      = &Error{msg: "duplicate address"}
@@ -477,6 +478,10 @@ type MulticastInterfaceOption struct {
 	InterfaceAddr Address
 }
 
+// MulticastLoopOption is used by SetSockOpt/GetSockOpt to specify whether
+// multicast packets sent over a non-loopback interface will be looped back.
+type MulticastLoopOption bool
+
 // MembershipOption is used by SetSockOpt/GetSockOpt as an argument to
 // AddMembershipOption and RemoveMembershipOption.
 type MembershipOption struct {