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4722f7e322
We're using it in more and more places, and it's not really specific to our use of Wireguard (and does more just link/interface monitoring). Also removes the separate interface we had for it in sockstats -- it's a small enough package (we already pull in all of its dependencies via other paths) that it's not worth the extra complexity. Updates #7621 Updates #7850 Signed-off-by: Mihai Parparita <mihai@tailscale.com>
57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package netmon
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import (
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"bufio"
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"fmt"
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"net"
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"strings"
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"tailscale.com/types/logger"
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)
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// unspecifiedMessage is a minimal message implementation that should not
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// be ignored. In general, OS-specific implementations should use better
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// types and avoid this if they can.
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type unspecifiedMessage struct{}
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func (unspecifiedMessage) ignore() bool { return false }
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// devdConn implements osMon using devd(8).
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type devdConn struct {
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conn net.Conn
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}
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func newOSMon(logf logger.Logf, m *Monitor) (osMon, error) {
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conn, err := net.Dial("unixpacket", "/var/run/devd.seqpacket.pipe")
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if err != nil {
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logf("devd dial error: %v, falling back to polling method", err)
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return newPollingMon(logf, m)
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}
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return &devdConn{conn}, nil
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}
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func (c *devdConn) IsInterestingInterface(iface string) bool { return true }
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func (c *devdConn) Close() error {
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return c.conn.Close()
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}
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func (c *devdConn) Receive() (message, error) {
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for {
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msg, err := bufio.NewReader(c.conn).ReadString('\n')
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if err != nil {
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return nil, fmt.Errorf("reading devd socket: %v", err)
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}
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// Only return messages related to the network subsystem.
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if !strings.Contains(msg, "system=IFNET") {
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continue
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}
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// TODO: this is where the devd-specific message would
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// get converted into a "standard" event message and returned.
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return unspecifiedMessage{}, nil
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}
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}
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