/
socket_listener.go
166 lines (144 loc) · 3.96 KB
/
socket_listener.go
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//go:generate ../../../tools/readme_config_includer/generator
package socket_listener
import (
_ "embed"
"fmt"
"net"
"net/url"
"regexp"
"strings"
"sync"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/config"
tlsint "github.com/influxdata/telegraf/plugins/common/tls"
"github.com/influxdata/telegraf/plugins/inputs"
"github.com/influxdata/telegraf/plugins/parsers"
)
//go:embed sample.conf
var sampleConfig string
type listener interface {
listen(acc telegraf.Accumulator)
addr() net.Addr
close() error
}
type SocketListener struct {
ServiceAddress string `toml:"service_address"`
MaxConnections int `toml:"max_connections"`
ReadBufferSize config.Size `toml:"read_buffer_size"`
ReadTimeout config.Duration `toml:"read_timeout"`
KeepAlivePeriod *config.Duration `toml:"keep_alive_period"`
SocketMode string `toml:"socket_mode"`
ContentEncoding string `toml:"content_encoding"`
Log telegraf.Logger `toml:"-"`
tlsint.ServerConfig
wg sync.WaitGroup
parser parsers.Parser
listener listener
}
func (*SocketListener) SampleConfig() string {
return sampleConfig
}
func (sl *SocketListener) Gather(_ telegraf.Accumulator) error {
return nil
}
func (sl *SocketListener) SetParser(parser telegraf.Parser) {
sl.parser = parser
}
func (sl *SocketListener) Start(acc telegraf.Accumulator) error {
// Resolve the interface to an address if any given
var ifname string
ifregex := regexp.MustCompile(`%([\w\.]+)`)
if matches := ifregex.FindStringSubmatch(sl.ServiceAddress); len(matches) == 2 {
ifname := matches[1]
sl.ServiceAddress = strings.Replace(sl.ServiceAddress, "%"+ifname, "", 1)
}
// Preparing TLS configuration
tlsCfg, err := sl.ServerConfig.TLSConfig()
if err != nil {
return fmt.Errorf("getting TLS config failed: %w", err)
}
// Setup the network connection
u, err := url.Parse(sl.ServiceAddress)
if err != nil {
return fmt.Errorf("parsing address failed: %w", err)
}
switch u.Scheme {
case "tcp", "tcp4", "tcp6":
ssl := &streamListener{
ReadBufferSize: int(sl.ReadBufferSize),
ReadTimeout: sl.ReadTimeout,
KeepAlivePeriod: sl.KeepAlivePeriod,
MaxConnections: sl.MaxConnections,
Encoding: sl.ContentEncoding,
Parser: sl.parser,
Log: sl.Log,
}
if err := ssl.setupTCP(u, tlsCfg); err != nil {
return err
}
sl.listener = ssl
case "unix", "unixpacket":
ssl := &streamListener{
ReadBufferSize: int(sl.ReadBufferSize),
ReadTimeout: sl.ReadTimeout,
KeepAlivePeriod: sl.KeepAlivePeriod,
MaxConnections: sl.MaxConnections,
Encoding: sl.ContentEncoding,
Parser: sl.parser,
Log: sl.Log,
}
if err := ssl.setupUnix(u, tlsCfg, sl.SocketMode); err != nil {
return err
}
sl.listener = ssl
case "udp", "udp4", "udp6":
psl := &packetListener{
Encoding: sl.ContentEncoding,
Parser: sl.parser,
}
if err := psl.setupUDP(u, ifname, int(sl.ReadBufferSize)); err != nil {
return err
}
sl.listener = psl
case "ip", "ip4", "ip6":
psl := &packetListener{
Encoding: sl.ContentEncoding,
Parser: sl.parser,
}
if err := psl.setupIP(u); err != nil {
return err
}
sl.listener = psl
case "unixgram":
psl := &packetListener{
Encoding: sl.ContentEncoding,
Parser: sl.parser,
}
if err := psl.setupUnixgram(u, sl.SocketMode); err != nil {
return err
}
sl.listener = psl
default:
return fmt.Errorf("unknown protocol %q in %q", u.Scheme, sl.ServiceAddress)
}
sl.Log.Infof("Listening on %s://%s", u.Scheme, sl.listener.addr())
sl.wg.Add(1)
go func() {
defer sl.wg.Done()
sl.listener.listen(acc)
}()
return nil
}
func (sl *SocketListener) Stop() {
if sl.listener != nil {
// Ignore the returned error as we cannot do anything about it anyway
_ = sl.listener.close()
sl.listener = nil
}
sl.wg.Wait()
}
func init() {
inputs.Add("socket_listener", func() telegraf.Input {
return &SocketListener{}
})
}