| // Copyright 2020 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package filter |
| |
| // endpointState represents the connection state of an endpoint. |
| type endpointState int |
| |
| const ( |
| // Note that we currently allow numeric comparison between two |
| // EndpointStates so that the state related logic can be described |
| // compactly. We assume an endpointState's numeric value will only |
| // increase monotonically during the lifetime of the endpoint |
| // (e.g. TCPFirstPacket => TCPOpening => TCPEstablished => TCPClosing => |
| // TCPFinWait => TCPClosed). |
| |
| // ICMP states. |
| // (TODO: consider more definitions.) |
| ICMPFirstPacket endpointState = iota |
| |
| // UDP states. |
| UDPFirstPacket |
| UDPSingle |
| UDPMultiple |
| |
| // TCP states. |
| TCPFirstPacket |
| TCPOpening |
| TCPEstablished |
| TCPClosing |
| TCPFinWait |
| TCPClosed |
| ) |
