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// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build illumos
// +build illumos
package unix_test
import (
"fmt"
"os/exec"
"strings"
"testing"
"golang.org/x/sys/unix"
)
func TestLifreqSetName(t *testing.T) {
var l unix.Lifreq
err := l.SetName("12345678901234356789012345678901234567890")
if err == nil {
t.Fatal(`Lifreq.SetName should reject names that are too long`)
}
err = l.SetName("tun0")
if err != nil {
t.Errorf(`Lifreq.SetName("tun0") failed: %v`, err)
}
}
func TestLifreqGetMTU(t *testing.T) {
// Find links and their MTU using CLI tooling
// $ dladm show-link -p -o link,mtu
// net0:1500
out, err := exec.Command("dladm", "show-link", "-p", "-o", "link,mtu").Output()
if err != nil {
t.Fatalf("unable to use dladm to find data links: %v", err)
}
lines := strings.Split(string(out), "\n")
tc := make(map[string]string)
for _, line := range lines {
v := strings.Split(line, ":")
if len(v) == 2 {
tc[v[0]] = v[1]
}
}
ip_fd, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM, 0)
if err != nil {
t.Fatalf("could not open udp socket: %v", err)
}
// SIOCGLIFMTU is negative which confuses the compiler if used inline:
// Using "unix.IoctlLifreq(ip_fd, unix.SIOCGLIFMTU, &l)" results in
// "constant -1065850502 overflows uint"
reqnum := int(unix.SIOCGLIFMTU)
var l unix.Lifreq
for link, mtu := range tc {
err = l.SetName(link)
if err != nil {
t.Fatalf("Lifreq.SetName(%q) failed: %v", link, err)
}
if err = unix.IoctlLifreq(ip_fd, uint(reqnum), &l); err != nil {
t.Fatalf("unable to SIOCGLIFMTU: %v", err)
}
m := l.GetLifruUint()
if fmt.Sprintf("%d", m) != mtu {
t.Errorf("unable to read MTU correctly: expected %s, got %d", mtu, m)
}
}
}
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