| // Copyright 2019 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 packetbuffer |
| |
| import ( |
| "gvisor.dev/gvisor/pkg/tcpip" |
| "gvisor.dev/gvisor/pkg/tcpip/buffer" |
| ) |
| |
| // OutboundToInbound coverts a PacketBuffer that conforms to the |
| // contract of WritePacket to one that conforms to the contract of |
| // DeliverNetworkPacket/InjectInbound/etc. |
| // |
| // The contract of WritePacket differs from that of DeliverNetworkPacket. |
| // WritePacket treats Header and Data as disjoint buffers; DeliverNetworkPacket |
| // expects Data to contain the full packet, including any Header bytes if they |
| // are present. |
| func OutboundToInbound(pkt tcpip.PacketBuffer) tcpip.PacketBuffer { |
| if hdr := pkt.Header.View(); len(hdr) > 0 { |
| pkt.Data = buffer.NewVectorisedView(len(hdr)+pkt.Data.Size(), append([]buffer.View{hdr}, pkt.Data.Views()...)) |
| pkt.Header = buffer.Prependable{} |
| } |
| return pkt |
| } |
