56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
package api
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import (
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"encoding/json"
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"net"
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"net/http"
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"time"
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"golang.org/x/sys/unix"
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)
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type mqttInfo struct {
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MqttRtt time.Duration
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}
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func (a *Api) mtpInfo(w http.ResponseWriter, r *http.Request) {
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//TODO: address with value from env or something like that
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conn, err := net.Dial("tcp", "127.0.0.1:1883")
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if err != nil {
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json.NewEncoder(w).Encode("Error to connect to broker")
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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defer conn.Close()
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info, err := tcpInfo(conn.(*net.TCPConn))
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if err != nil {
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json.NewEncoder(w).Encode("Error to get TCP socket info")
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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rtt := time.Duration(info.Rtt) * time.Microsecond
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json.NewEncoder(w).Encode(mqttInfo{
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MqttRtt: rtt / 1000,
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})
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}
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func tcpInfo(conn *net.TCPConn) (*unix.TCPInfo, error) {
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raw, err := conn.SyscallConn()
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if err != nil {
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return nil, err
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}
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var info *unix.TCPInfo
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ctrlErr := raw.Control(func(fd uintptr) {
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info, err = unix.GetsockoptTCPInfo(int(fd), unix.IPPROTO_TCP, unix.TCP_INFO)
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})
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switch {
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case ctrlErr != nil:
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return nil, ctrlErr
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case err != nil:
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return nil, err
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}
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return info, nil
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}
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