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tailscale/wgengine/monitor/monitor_freebsd.go

49 lines
1.1 KiB
Go

// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package monitor
import (
"bufio"
"fmt"
"net"
"strings"
)
// devdConn implements osMon using devd(8).
type devdConn struct {
conn net.Conn
}
func newOSMon() (osMon, error) {
conn, err := net.Dial("unixpacket", "/var/run/devd.seqpacket.pipe")
if err != nil {
return nil, fmt.Errorf("devd dial error: %v", err)
}
if err != nil {
return nil, fmt.Errorf("dialing devd socket: %v", err)
}
return &devdConn{conn}, nil
}
func (c *devdConn) Close() error {
return c.conn.Close()
}
func (c *devdConn) Receive() (message, error) {
for {
msg, err := bufio.NewReader(c.conn).ReadString('\n')
if err != nil {
return nil, fmt.Errorf("reading devd socket: %v", err)
}
// Only return messages related to the network subsystem.
if !strings.Contains(msg, "system=IFNET") {
continue
}
// TODO(]|[): this is where the devd-specific message would
// get converted into a "standard" event message and returned.
return nil, nil
}
}