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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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tcp/conn.go
+8 -4
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@@ -278,23 +278,27 @@ func (conn *Conn) Demux(buf []byte, off int) (err error) {
return nil
}
func (conn *Conn) Encapsulate(buf []byte, off int) (n int, err error) {
func (conn *Conn) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (n int, err error) {
conn.mu.Lock()
defer conn.mu.Unlock()
if len(conn.remoteAddr) == 0 {
return 0, errNoRemoteAddr
}
raddr, _, _, _, err := internal.GetIPAddr(buf[:off])
if offsetToIP < 0 {
return 0, errNoRemoteAddr // No IP layer present.
}
ipFrame := carrierData[offsetToIP:offsetToFrame]
raddr, _, _, _, err := internal.GetIPAddr(ipFrame)
if err != nil {
return 0, err
} else if len(raddr) != len(conn.remoteAddr) {
return 0, errMismatchedIPVersion
}
n, err = conn.h.Send(buf[off:])
n, err = conn.h.Send(carrierData[offsetToFrame:])
if err != nil {
return 0, err
}
err = internal.SetIPAddrs(buf[:off], conn.ipID, nil, conn.remoteAddr)
err = internal.SetIPAddrs(ipFrame, conn.ipID, nil, conn.remoteAddr)
if err != nil {
return 0, err
}