josh/jrouter
josh/jrouter
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Code Issues 10 Pull requests Releases 1 Activity

Size better

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This commit is contained in:
Josh Deprez 2024-04-15 10:16:57 +10:00
parent 3be22b5b9b
commit 6b8ed2f807
Signed by: josh
SSH key fingerprint: SHA256:zZji7w1Ilh2RuUpbQcqkLPrqmRwpiCSycbF2EfKm6Kw
3 changed files with 9 additions and 5 deletions
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2
atalk/raw.go
View file

@ -23,6 +23,8 @@ import (
"github.com/google/gopacket/pcap"
)
const DDPExtHeaderSize = 13
// StartPcap opens an AppleTalk and AARP listening session on a network device.
func StartPcap(device string) (*pcap.Handle, error) {
handle, err := pcap.OpenLive(device, 4096, true, 100*time.Millisecond)

7
rtmp.go
View file

@ -22,6 +22,7 @@ import (
"log"
"time"
"gitea.drjosh.dev/josh/jrouter/atalk"
"gitea.drjosh.dev/josh/jrouter/atalk/rtmp"
"github.com/google/gopacket/pcap"
"github.com/sfiera/multitalk/pkg/aarp"
@ -97,7 +98,7 @@ func (m *RTMPMachine) Run(ctx context.Context, incomingCh <-chan *ddp.ExtPacket)
}
ddpPkt := &ddp.ExtPacket{
ExtHeader: ddp.ExtHeader{
Size: uint16(len(respPktRaw)),
Size: uint16(len(respPktRaw)) + atalk.DDPExtHeaderSize,
Cksum: 0,
DstNet: pkt.SrcNet,
DstNode: pkt.SrcNode,
@ -127,7 +128,7 @@ func (m *RTMPMachine) Run(ctx context.Context, incomingCh <-chan *ddp.ExtPacket)
ddpPkt := &ddp.ExtPacket{
ExtHeader: ddp.ExtHeader{
Size: uint16(len(dataPktRaw)),
Size: uint16(len(dataPktRaw)) + atalk.DDPExtHeaderSize,
Cksum: 0,
DstNet: pkt.SrcNet,
DstNode: pkt.SrcNode,
@ -182,7 +183,7 @@ func (m *RTMPMachine) broadcastData(myAddr aarp.AddrPair) error {
ddpPkt := &ddp.ExtPacket{
ExtHeader: ddp.ExtHeader{
Size: uint16(len(dataPktRaw)),
Size: uint16(len(dataPktRaw)) + atalk.DDPExtHeaderSize,
Cksum: 0,
DstNet: 0, // this network
DstNode: 0xff, // broadcast packet

5
zip.go
View file

@ -20,6 +20,7 @@ import (
"fmt"
"log"
"gitea.drjosh.dev/josh/jrouter/atalk"
"gitea.drjosh.dev/josh/jrouter/atalk/atp"
"gitea.drjosh.dev/josh/jrouter/atalk/zip"
"github.com/google/gopacket/pcap"
@ -68,7 +69,7 @@ func handleZIP(pcapHandle *pcap.Handle, srcHWAddr, myHWAddr ethernet.Addr, myAdd
}
respDDP := ddp.ExtPacket{
ExtHeader: ddp.ExtHeader{
Size: uint16(len(ddpBody)),
Size: uint16(len(ddpBody)) + atalk.DDPExtHeaderSize,
Cksum: 0,
DstNet: ddpkt.SrcNet,
DstNode: ddpkt.SrcNode,
@ -158,7 +159,7 @@ func handleZIP(pcapHandle *pcap.Handle, srcHWAddr, myHWAddr ethernet.Addr, myAdd
// routers should respond with a broadcast."
outDDP := ddp.ExtPacket{
ExtHeader: ddp.ExtHeader{
Size: uint16(len(respRaw)),
Size: uint16(len(respRaw)) + atalk.DDPExtHeaderSize,
Cksum: 0,
DstNet: ddpkt.SrcNet,
DstNode: ddpkt.SrcNode,