diff options
Diffstat (limited to 'pkg/tcpip/stack/registration.go')
| -rw-r--r-- | pkg/tcpip/stack/registration.go | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/pkg/tcpip/stack/registration.go b/pkg/tcpip/stack/registration.go index 77640cd8a..780a5ebde 100644 --- a/pkg/tcpip/stack/registration.go +++ b/pkg/tcpip/stack/registration.go @@ -197,6 +197,21 @@ type TransportProtocol interface { Parse(pkt *PacketBuffer) (ok bool) } +// TransportPacketDisposition is the result from attempting to deliver a packet +// to the transport layer. +type TransportPacketDisposition int + +const ( + // TransportPacketHandled indicates that a transport packet was handled by the + // transport layer and callers need not take any further action. + TransportPacketHandled TransportPacketDisposition = iota + + // TransportPacketDestinationPortUnreachable indicates that there weren't any + // listeners interested in the packet and the transport protocol has no means + // to notify the sender. + TransportPacketDestinationPortUnreachable +) + // TransportDispatcher contains the methods used by the network stack to deliver // packets to the appropriate transport endpoint after it has been handled by // the network layer. @@ -207,7 +222,7 @@ type TransportDispatcher interface { // pkt.NetworkHeader must be set before calling DeliverTransportPacket. // // DeliverTransportPacket takes ownership of pkt. - DeliverTransportPacket(r *Route, protocol tcpip.TransportProtocolNumber, pkt *PacketBuffer) + DeliverTransportPacket(r *Route, protocol tcpip.TransportProtocolNumber, pkt *PacketBuffer) TransportPacketDisposition // DeliverTransportControlPacket delivers control packets to the // appropriate transport protocol endpoint. @@ -342,19 +357,6 @@ type NetworkProtocol interface { // does not encapsulate anything). // - Whether pkt.Data was large enough to parse and set pkt.NetworkHeader. Parse(pkt *PacketBuffer) (proto tcpip.TransportProtocolNumber, hasTransportHdr bool, ok bool) - - // ReturnError attempts to send a suitable error message to the sender - // of a received packet. - // - pkt holds the problematic packet. - // - reason indicates what the reason for wanting a message is. - // - route is the routing information for the received packet - // ReturnError returns an error if the send failed and nil on success. - // Note that deciding to deliberately send no message is a success. - // - // TODO(gvisor.dev/issues/3871): This method should be removed or simplified - // after all (or all but one) of the ICMP error dispatch occurs through the - // protocol specific modules. May become SendPortNotFound(r, pkt). - ReturnError(r *Route, reason tcpip.ICMPReason, pkt *PacketBuffer) *tcpip.Error } // NetworkDispatcher contains the methods used by the network stack to deliver |