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Fix: macOS udp find process should use unspecified fallback

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This commit is contained in:
gVisor bot 2022-07-15 17:00:41 +08:00
parent 460934fc06
commit 179989317c
1 changed files with 19 additions and 6 deletions
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23
component/process/process_darwin.go
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@ -44,6 +44,8 @@ func findProcessName(network string, ip net.IP, port int) (string, error) {
// rup8(sizeof(xtcpcb_n))
itemSize += 208
}
var fallbackUDPProcess string
// skip the first xinpgen(24 bytes) block
for i := 24; i+itemSize <= len(buf); i += itemSize {
// offset of xinpcb_n and xsocket_n
@ -57,11 +59,15 @@ func findProcessName(network string, ip net.IP, port int) (string, error) {
// xinpcb_n.inp_vflag
flag := buf[inp+44]
var srcIP net.IP
var (
srcIP net.IP
srcIsIPv4 bool
)
switch {
case flag&0x1 > 0 && isIPv4:
// ipv4
srcIP = net.IP(buf[inp+76 : inp+80])
srcIsIPv4 = true
case flag&0x2 > 0 && !isIPv4:
// ipv6
srcIP = net.IP(buf[inp+64 : inp+80])
@ -69,15 +75,22 @@ func findProcessName(network string, ip net.IP, port int) (string, error) {
continue
}
if !ip.Equal(srcIP) {
continue
}
if ip.Equal(srcIP) {
// xsocket_n.so_last_pid
pid := readNativeUint32(buf[so+68 : so+72])
return getExecPathFromPID(pid)
}
// udp packet connection may be not equal with srcIP
if network == UDP && srcIP.IsUnspecified() && isIPv4 == srcIsIPv4 {
fallbackUDPProcess, _ = getExecPathFromPID(readNativeUint32(buf[so+68 : so+72]))
}
}
if network == UDP && fallbackUDPProcess != "" {
return fallbackUDPProcess, nil
}
return "", ErrNotFound
}