71 lines
1.9 KiB
Go
71 lines
1.9 KiB
Go
/*
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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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"gitea.drjosh.dev/josh/jrouter/atalk"
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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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type Router struct {
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Config *Config
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PcapHandle *pcap.Handle
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MyHWAddr ethernet.Addr
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MyDDPAddr ddp.Addr
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AARPMachine *AARPMachine
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RouteTable *RoutingTable
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ZoneTable *ZoneTable
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}
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func (rtr *Router) SendEtherTalkDDP(ctx context.Context, pkt *ddp.ExtPacket) error {
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dstEth := ethertalk.AppleTalkBroadcast
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if pkt.DstNode != 0xFF {
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de, err := rtr.AARPMachine.Resolve(ctx, ddp.Addr{Network: pkt.DstNet, Node: pkt.DstNode})
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if err != nil {
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return err
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}
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dstEth = de
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}
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return rtr.sendEtherTalkDDP(dstEth, pkt)
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}
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func (rtr *Router) BroadcastEtherTalkDDP(pkt *ddp.ExtPacket) error {
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return rtr.sendEtherTalkDDP(ethertalk.AppleTalkBroadcast, pkt)
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}
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func (rtr *Router) ZoneMulticastEtherTalkDDP(zone string, pkt *ddp.ExtPacket) error {
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return rtr.sendEtherTalkDDP(atalk.MulticastAddr(zone), pkt)
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}
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func (rtr *Router) sendEtherTalkDDP(dstEth ethernet.Addr, pkt *ddp.ExtPacket) error {
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outFrame, err := ethertalk.AppleTalk(rtr.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 = dstEth
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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 rtr.PcapHandle.WritePacketData(outFrameRaw)
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}
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