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Add source IP flag and implementation #89

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Add source IP flag and implementation #89

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8a832dc
add source IP flag and implementation
maybe-hello-world Mar 9, 2023
4f6ea00
add new line after previous output
maybe-hello-world Mar 9, 2023
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19 changes: 19 additions & 0 deletions cmd/ndt7-client/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -91,10 +91,12 @@
package main

import (
"context"
"crypto/tls"
"flag"
"fmt"
"log"
"net"
"os"
"runtime/pprof"
"strings"
Expand Down Expand Up @@ -138,6 +140,7 @@ var (
flagService = flagx.URL{}
flagUpload = flag.Bool("upload", true, "perform upload measurement")
flagDownload = flag.Bool("download", true, "perform download measurement")
flagSourceIp = flag.String("source", "", "source IP for the test")
)

func init() {
Expand Down Expand Up @@ -195,6 +198,15 @@ func main() {
flagService.URL = nil
}

var parsedIp net.IP = nil
// source IP checking
if *flagSourceIp != "" {
parsedIp = net.ParseIP(*flagSourceIp)
if parsedIp == nil {
fmt.Printf("WARNING: ignoring unparsed source IP: %s\n", *flagSourceIp)
}
}

var e emitter.Emitter

// If -batch, force -format=json.
Expand All @@ -220,6 +232,13 @@ func main() {
c.Dialer.TLSClientConfig = &tls.Config{
InsecureSkipVerify: *flagNoVerify,
}
if parsedIp != nil {
c.Dialer.NetDialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
fmt.Printf("\nINFO: using source IP: %s\n", parsedIp.String())
dialer := net.Dialer{LocalAddr: &net.TCPAddr{IP: parsedIp}}
return dialer.DialContext(ctx, network, addr)
}
}

return c
},
Expand Down