1 // Copyright 2021 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include <optional> 17 18 #include "pw_bytes/span.h" 19 #include "pw_router/packet_parser.h" 20 #include "pw_span/span.h" 21 #include "pw_status/status.h" 22 23 namespace pw::router { 24 25 // Data egress for a router to send packets over some transport system. 26 class Egress { 27 public: 28 virtual ~Egress() = default; 29 30 // Sends a complete packet/frame over the transport. Returns OK on success, or 31 // an error status on failure. Invoked with the packet data and the parser 32 // from the RoutePacket() call. 33 // 34 // TODO(frolv): Document possible return values. 35 virtual Status SendPacket(ConstByteSpan packet, 36 const PacketParser& parser) = 0; 37 }; 38 39 } // namespace pw::router 40