josh/jrouter
josh/jrouter
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[WIP] Send an AARP probe

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This commit is contained in:
Josh Deprez 2024-04-06 16:02:30 +11:00
parent 5f7e07157e
commit acf8400f47
Signed by: josh
SSH key fingerprint: SHA256:zZji7w1Ilh2RuUpbQcqkLPrqmRwpiCSycbF2EfKm6Kw
1 changed files with 26 additions and 8 deletions
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34
main.go
View file

@ -17,7 +17,6 @@
package main
import (
"bytes"
"context"
"errors"
"flag"
@ -34,6 +33,7 @@ import (
"gitea.drjosh.dev/josh/jrouter/aurp"
"github.com/sfiera/multitalk/pkg/aarp"
"github.com/sfiera/multitalk/pkg/ddp"
"github.com/sfiera/multitalk/pkg/ethernet"
"github.com/sfiera/multitalk/pkg/ethertalk"
)
@ -145,7 +145,7 @@ func main() {
if err != nil {
log.Fatalf("Couldn't find interface named %q: %v", cfg.EtherTalk.Device, err)
}
localMAC := iface.HardwareAddr
localMAC := ethernet.Addr(iface.HardwareAddr)
handle, err := atalk.StartPcap(cfg.EtherTalk.Device)
if err != nil {
@ -153,6 +153,24 @@ func main() {
}
defer handle.Close()
// AARP probe for our preferred address (first network.1)
localDDPAddr := ddp.Addr{
Network: ddp.Network(cfg.EtherTalk.NetStart),
Node: 1,
}
probeFrame, err := ethertalk.AARP(localMAC, aarp.Probe(localMAC, localDDPAddr))
if err != nil {
log.Fatalf("Couldn't construct AARP Probe: %v", err)
}
probeFrameRaw, err := ethertalk.Marshal(*probeFrame)
if err != nil {
log.Fatalf("Couldn't marshal AARP Probe: %v", err)
}
if err := handle.WritePacketData(probeFrameRaw); err != nil {
log.Fatalf("Couldn't write packet data: %v", err)
}
for {
rawPkt, _, err := handle.ReadPacketData()
if err != nil {
@ -165,7 +183,7 @@ func main() {
continue
}
if bytes.Equal(ethFrame.Src[:], localMAC) {
if ethFrame.Src == localMAC {
continue
}
@ -215,7 +233,7 @@ func main() {
}
}()
// Incoming packet loop
// AURP packet loop
for {
if ctx.Err() != nil {
return
@ -229,18 +247,18 @@ func main() {
continue
}
log.Printf("Received packet of length %d from %v", pktlen, raddr)
log.Printf("AURP: Received packet of length %d from %v", pktlen, raddr)
dh, pkt, parseErr := aurp.ParsePacket(pktbuf[:pktlen])
if parseErr != nil {
log.Printf("Failed to parse packet: %v", parseErr)
log.Printf("AURP: Failed to parse packet: %v", parseErr)
}
if readErr != nil {
log.Printf("Failed to read packet: %v", readErr)
log.Printf("AURP: Failed to read packet: %v", readErr)
return
}
log.Printf("The packet parsed succesfully as a %T", pkt)
log.Printf("AURP: The packet parsed succesfully as a %T", pkt)
if apkt, ok := pkt.(*aurp.AppleTalkPacket); ok {
var ddpkt ddp.ExtPacket