net/netstat: start of new netstat package, with Windows for now
This will be used in a future change to do localhost connection authentication. This lets us quickly map a localhost TCP connection to a PID. (A future change will then map a pid to a user) TODO: pull portlist's netstat code into this package. Then portlist will be fast on Windows without requiring shelling out to netstat.exe.
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net/netstat/netstat.go
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36
net/netstat/netstat.go
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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package netstat returns the local machine's network connection table.
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package netstat
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import (
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"errors"
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"runtime"
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"inet.af/netaddr"
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)
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var ErrNotImplemented = errors.New("not implemented for GOOS=" + runtime.GOOS)
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type Entry struct {
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Local, Remote netaddr.IPPort
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Pid int
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State string // TODO: type?
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}
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// Table contains local machine's TCP connection entries.
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//
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// Currently only TCP (IPv4 and IPv6) are included.
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type Table struct {
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Entries []Entry
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}
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// Get returns the connection table.
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//
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// It returns ErrNotImplemented if the table is not available for the
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// current operating system.
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func Get() (*Table, error) {
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return get()
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}
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