1// Copyright 2017 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package net
6
7import (
8	"bytes"
9	"reflect"
10	"syscall"
11	"testing"
12	"time"
13)
14
15func TestUnixgramAutobind(t *testing.T) {
16	laddr := &UnixAddr{Name: "", Net: "unixgram"}
17	c1, err := ListenUnixgram("unixgram", laddr)
18	if err != nil {
19		t.Fatal(err)
20	}
21	defer c1.Close()
22
23	// retrieve the autobind address
24	autoAddr := c1.LocalAddr().(*UnixAddr)
25	if len(autoAddr.Name) <= 1 {
26		t.Fatalf("invalid autobind address: %v", autoAddr)
27	}
28	if autoAddr.Name[0] != '@' {
29		t.Fatalf("invalid autobind address: %v", autoAddr)
30	}
31
32	c2, err := DialUnix("unixgram", nil, autoAddr)
33	if err != nil {
34		t.Fatal(err)
35	}
36	defer c2.Close()
37
38	if !reflect.DeepEqual(c1.LocalAddr(), c2.RemoteAddr()) {
39		t.Fatalf("expected autobind address %v, got %v", c1.LocalAddr(), c2.RemoteAddr())
40	}
41}
42
43func TestUnixAutobindClose(t *testing.T) {
44	laddr := &UnixAddr{Name: "", Net: "unix"}
45	ln, err := ListenUnix("unix", laddr)
46	if err != nil {
47		t.Fatal(err)
48	}
49	ln.Close()
50}
51
52func TestUnixgramLinuxAbstractLongName(t *testing.T) {
53	if !testableNetwork("unixgram") {
54		t.Skip("abstract unix socket long name test")
55	}
56
57	// Create an abstract socket name whose length is exactly
58	// the maximum RawSockkaddrUnix Path len
59	rsu := syscall.RawSockaddrUnix{}
60	addrBytes := make([]byte, len(rsu.Path))
61	copy(addrBytes, "@abstract_test")
62	addr := string(addrBytes)
63
64	la, err := ResolveUnixAddr("unixgram", addr)
65	if err != nil {
66		t.Fatal(err)
67	}
68	c, err := ListenUnixgram("unixgram", la)
69	if err != nil {
70		t.Fatal(err)
71	}
72	defer c.Close()
73
74	off := make(chan bool)
75	data := [5]byte{1, 2, 3, 4, 5}
76	go func() {
77		defer func() { off <- true }()
78		s, err := syscall.Socket(syscall.AF_UNIX, syscall.SOCK_DGRAM, 0)
79		if err != nil {
80			t.Error(err)
81			return
82		}
83		defer syscall.Close(s)
84		rsa := &syscall.SockaddrUnix{Name: addr}
85		if err := syscall.Sendto(s, data[:], 0, rsa); err != nil {
86			t.Error(err)
87			return
88		}
89	}()
90
91	<-off
92	b := make([]byte, 64)
93	c.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
94	n, from, err := c.ReadFrom(b)
95	if err != nil {
96		t.Fatal(err)
97	}
98	if from != nil {
99		t.Fatalf("unexpected peer address: %v", from)
100	}
101	if !bytes.Equal(b[:n], data[:]) {
102		t.Fatalf("got %v; want %v", b[:n], data[:])
103	}
104}
105