mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-25 19:15:34 +00:00
52e4f24c58
The Port.Pid was always more of an implementation detail on some platforms and isn't necessary on Linux so it was never populated. (Nothing outside the portlist package ever used it) But might as well populate it for consistency since we have it in memory and its absence confused people. Updates #cleanup Change-Id: I869768a75c9fedeff242a5452206e2b2947a17cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
81 lines
1.7 KiB
Go
81 lines
1.7 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
// This file is just the types. The bulk of the code is in poller.go.
|
|
|
|
// The portlist package contains code that checks what ports are open and
|
|
// listening on the current machine.
|
|
package portlist
|
|
|
|
import (
|
|
"fmt"
|
|
"sort"
|
|
"strings"
|
|
)
|
|
|
|
// Port is a listening port on the machine.
|
|
type Port struct {
|
|
Proto string // "tcp" or "udp"
|
|
Port uint16 // port number
|
|
Process string // optional process name, if found (requires suitable permissions)
|
|
Pid int // process ID, if known (requires suitable permissions)
|
|
}
|
|
|
|
// List is a list of Ports.
|
|
type List []Port
|
|
|
|
func (a *Port) lessThan(b *Port) bool {
|
|
if a.Port != b.Port {
|
|
return a.Port < b.Port
|
|
}
|
|
if a.Proto != b.Proto {
|
|
return a.Proto < b.Proto
|
|
}
|
|
return a.Process < b.Process
|
|
}
|
|
|
|
func (a *Port) equal(b *Port) bool {
|
|
return a.Port == b.Port &&
|
|
a.Proto == b.Proto &&
|
|
a.Process == b.Process
|
|
}
|
|
|
|
func (a List) equal(b List) bool {
|
|
if len(a) != len(b) {
|
|
return false
|
|
}
|
|
for i := range a {
|
|
if !a[i].equal(&b[i]) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (pl List) String() string {
|
|
var sb strings.Builder
|
|
for _, v := range pl {
|
|
fmt.Fprintf(&sb, "%-3s %5d %#v\n",
|
|
v.Proto, v.Port, v.Process)
|
|
}
|
|
return strings.TrimRight(sb.String(), "\n")
|
|
}
|
|
|
|
// sortAndDedup sorts ps in place (by Port.lessThan) and then returns
|
|
// a subset of it with duplicate (Proto, Port) removed.
|
|
func sortAndDedup(ps List) List {
|
|
sort.Slice(ps, func(i, j int) bool {
|
|
return (&ps[i]).lessThan(&ps[j])
|
|
})
|
|
out := ps[:0]
|
|
var last Port
|
|
for _, p := range ps {
|
|
if last.Proto == p.Proto && last.Port == p.Port {
|
|
continue
|
|
}
|
|
out = append(out, p)
|
|
last = p
|
|
}
|
|
return out
|
|
}
|