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StackNode refactor: add offsetToIP argument to Encapsulate

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This commit is contained in:
Patricio Whittingslow
2025-12-19 00:38:28 -03:00
parent eaa36a589a
commit 1554b89a08
22 changed files with 180 additions and 94 deletions
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internet/stack-udpport.go
+6 -5
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@@ -61,24 +61,25 @@ func (sudp *StackUDPPort) Demux(carrierData []byte, frameOffset int) error {
return err
}
func (sudp *StackUDPPort) Encapsulate(carrierData []byte, frameOffset int) (int, error) {
func (sudp *StackUDPPort) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (int, error) {
if sudp.h.IsInvalid() {
sudp.h.destroy()
return 0, net.ErrClosed
}
ufrm, err := udp.NewFrame(carrierData[frameOffset:])
ufrm, err := udp.NewFrame(carrierData[offsetToFrame:])
if err != nil {
return 0, err
}
ufrm.SetSourcePort(sudp.h.port)
ufrm.SetDestinationPort(sudp.rmport)
if len(sudp.raddr) > 0 && frameOffset >= 20 {
err = internal.SetIPAddrs(carrierData, 0, nil, sudp.raddr)
if len(sudp.raddr) > 0 && offsetToIP >= 0 {
err = internal.SetIPAddrs(carrierData[offsetToIP:], 0, nil, sudp.raddr)
if err != nil {
return 0, err
}
}
n, err := sudp.h.encapsulate(carrierData, frameOffset+8)
// Child payload starts 8 bytes after UDP header start.
n, err := sudp.h.encapsulate(carrierData, offsetToIP, offsetToFrame+8)
if n == 0 {
if err != nil {
slog.Error("stackudp:encapsulate", slog.String("err", err.Error()))