renaming plugins -> inputs

plugins/inputs/system/netstat.go

@@ -0,0 +1,70 @@
+package system
+
+import (
+	"fmt"
+	"syscall"
+
+	"github.com/influxdb/telegraf/plugins/inputs"
+)
+
+type NetStats struct {
+	ps PS
+}
+
+func (_ *NetStats) Description() string {
+	return "Read metrics about TCP status such as established, time wait etc and UDP sockets counts."
+}
+
+var tcpstatSampleConfig = ""
+
+func (_ *NetStats) SampleConfig() string {
+	return tcpstatSampleConfig
+}
+
+func (s *NetStats) Gather(acc inputs.Accumulator) error {
+	netconns, err := s.ps.NetConnections()
+	if err != nil {
+		return fmt.Errorf("error getting net connections info: %s", err)
+	}
+	counts := make(map[string]int)
+	counts["UDP"] = 0
+
+	// TODO: add family to tags or else
+	tags := map[string]string{}
+	for _, netcon := range netconns {
+		if netcon.Type == syscall.SOCK_DGRAM {
+			counts["UDP"] += 1
+			continue // UDP has no status
+		}
+		c, ok := counts[netcon.Status]
+		if !ok {
+			counts[netcon.Status] = 0
+		}
+		counts[netcon.Status] = c + 1
+	}
+
+	fields := map[string]interface{}{
+		"tcp_established": counts["ESTABLISHED"],
+		"tcp_syn_sent":    counts["SYN_SENT"],
+		"tcp_syn_recv":    counts["SYN_RECV"],
+		"tcp_fin_wait1":   counts["FIN_WAIT1"],
+		"tcp_fin_wait2":   counts["FIN_WAIT2"],
+		"tcp_time_wait":   counts["TIME_WAIT"],
+		"tcp_close":       counts["CLOSE"],
+		"tcp_close_wait":  counts["CLOSE_WAIT"],
+		"tcp_last_ack":    counts["LAST_ACK"],
+		"tcp_listen":      counts["LISTEN"],
+		"tcp_closing":     counts["CLOSING"],
+		"tcp_none":        counts["NONE"],
+		"udp_socket":      counts["UDP"],
+	}
+	acc.AddFields("netstat", fields, tags)
+
+	return nil
+}
+
+func init() {
+	inputs.Add("netstat", func() inputs.Input {
+		return &NetStats{ps: &systemPS{}}
+	})
+}