[Console]::OutputEncoding = [Text.Encoding]::UTF8
$f = "$env:TEMP\opencode\cold2.tsv"
$lines = [IO.File]::ReadAllLines($f)
function H2B($hex) { $n = $hex.Length / 2; $b = New-Object byte[] $n; for ($i = 0; $i -lt $n; $i++) { $b[$i] = [Convert]::ToByte($hex.Substring(2*$i, 2), 16) }; return $b }
function G32le($b, $o) { return $b[$o] -bor ($b[$o+1] -shl 8) -bor ($b[$o+2] -shl 16) -bor ($b[$o+3] -shl 24) }

Write-Host "=== cold2 前 120 帧 113→.1 (认领建立期) ==="
$count = 0
foreach ($l in $lines) {
    $p = $l -split "`t"; if ($p.Count -lt 5) { continue }
    if ($p[1] -ne "192.168.123.113") { continue }
    $b = H2B $p[4]
    $t = [double]$p[0]
    $len = $b.Length
    $magic = [Text.Encoding]::ASCII.GetString($b[0..3])
    $type = G32le $b 4
    $desc = ""
    if ($magic -eq "ENet" -and $type -eq 4 -and $len -ge 0x50) {
        $sub = "{0:x2}{1:x2}" -f $b[0x19], $b[0x18]
        $flag = $b[0x30]
        if ($b[0x2A] -eq 0xCC -or $b[0x3C] -eq 0x01) {
            $msgLen = $b[0x3D]; $cc = $b[0x4F]; $pid = ($b[0x50] -shl 8) -bor $b[0x51]
            $desc = "RDM请求 sub=$sub flag=$('{0:x2}' -f $flag) msgLen=$msgLen CC=$('{0:x2}' -f $cc) PID=$('{0:x4}' -f $pid) TN=$('{0:x2}' -f $b[0x4A])"
        } else { $desc = "type4 sub=$sub flag=$('{0:x2}' -f $flag) 0x2A=$('{0:x2}' -f $b[0x2A])" }
    } elseif ($magic -eq "ENet" -and $type -eq 4) {
        $desc = "type4 短帧"
    }
    Write-Host ("{0,9:N3}  len={1,-5} magic={2} type={3} {4}" -f $t, $len, $magic, $type, $desc)
    $count++
    if ($count -ge 120) { break }
}