55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
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/*
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Copyright 2024 Josh Deprez
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package router
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import (
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"context"
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"github.com/google/gopacket/pcap"
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"github.com/sfiera/multitalk/pkg/ddp"
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"github.com/sfiera/multitalk/pkg/ethernet"
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"github.com/sfiera/multitalk/pkg/ethertalk"
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)
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// EtherTalkPeer holds data needed to exchange routes and zones with another
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// router on the EtherTalk network.
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type EtherTalkPeer struct {
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PcapHandle *pcap.Handle
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MyHWAddr ethernet.Addr
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AARP *AARPMachine
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PeerAddr ddp.Addr
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}
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// Forward forwards a DDP packet to the next router.
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func (p *EtherTalkPeer) Forward(ctx context.Context, pkt *ddp.ExtPacket) error {
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// TODO: AARP resolution can block
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de, err := p.AARP.Resolve(ctx, p.PeerAddr)
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if err != nil {
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return err
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}
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outFrame, err := ethertalk.AppleTalk(p.MyHWAddr, *pkt)
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if err != nil {
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return err
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}
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outFrame.Dst = de
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outFrameRaw, err := ethertalk.Marshal(*outFrame)
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if err != nil {
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return err
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}
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return p.PcapHandle.WritePacketData(outFrameRaw)
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}
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