371 lines
8.9 KiB
Go
371 lines
8.9 KiB
Go
// Copyright 2009 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.
|
|
|
|
package net
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"reflect"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
type resolveIPAddrTest struct {
|
|
net string
|
|
litAddr string
|
|
addr *IPAddr
|
|
err error
|
|
}
|
|
|
|
var resolveIPAddrTests = []resolveIPAddrTest{
|
|
{"ip", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
|
|
{"ip4", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
|
|
{"ip4:icmp", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
|
|
|
|
{"ip", "::1", &IPAddr{IP: ParseIP("::1")}, nil},
|
|
{"ip6", "::1", &IPAddr{IP: ParseIP("::1")}, nil},
|
|
{"ip6:ipv6-icmp", "::1", &IPAddr{IP: ParseIP("::1")}, nil},
|
|
|
|
{"ip", "::1%en0", &IPAddr{IP: ParseIP("::1"), Zone: "en0"}, nil},
|
|
{"ip6", "::1%911", &IPAddr{IP: ParseIP("::1"), Zone: "911"}, nil},
|
|
|
|
{"", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil}, // Go 1.0 behavior
|
|
{"", "::1", &IPAddr{IP: ParseIP("::1")}, nil}, // Go 1.0 behavior
|
|
|
|
{"l2tp", "127.0.0.1", nil, UnknownNetworkError("l2tp")},
|
|
{"l2tp:gre", "127.0.0.1", nil, UnknownNetworkError("l2tp:gre")},
|
|
{"tcp", "1.2.3.4:123", nil, UnknownNetworkError("tcp")},
|
|
}
|
|
|
|
func init() {
|
|
if ifi := loopbackInterface(); ifi != nil {
|
|
index := fmt.Sprintf("%v", ifi.Index)
|
|
resolveIPAddrTests = append(resolveIPAddrTests, []resolveIPAddrTest{
|
|
{"ip6", "fe80::1%" + ifi.Name, &IPAddr{IP: ParseIP("fe80::1"), Zone: zoneToString(ifi.Index)}, nil},
|
|
{"ip6", "fe80::1%" + index, &IPAddr{IP: ParseIP("fe80::1"), Zone: index}, nil},
|
|
}...)
|
|
}
|
|
}
|
|
|
|
func TestResolveIPAddr(t *testing.T) {
|
|
for _, tt := range resolveIPAddrTests {
|
|
addr, err := ResolveIPAddr(tt.net, tt.litAddr)
|
|
if err != tt.err {
|
|
condFatalf(t, "ResolveIPAddr(%v, %v) failed: %v", tt.net, tt.litAddr, err)
|
|
} else if !reflect.DeepEqual(addr, tt.addr) {
|
|
t.Fatalf("got %#v; expected %#v", addr, tt.addr)
|
|
}
|
|
}
|
|
}
|
|
|
|
var icmpEchoTests = []struct {
|
|
net string
|
|
laddr string
|
|
raddr string
|
|
}{
|
|
{"ip4:icmp", "0.0.0.0", "127.0.0.1"},
|
|
{"ip6:ipv6-icmp", "::", "::1"},
|
|
}
|
|
|
|
func TestConnICMPEcho(t *testing.T) {
|
|
if os.Getuid() != 0 {
|
|
t.Skip("skipping test; must be root")
|
|
}
|
|
|
|
for i, tt := range icmpEchoTests {
|
|
net, _, err := parseNetwork(tt.net)
|
|
if err != nil {
|
|
t.Fatalf("parseNetwork failed: %v", err)
|
|
}
|
|
if net == "ip6" && !supportsIPv6 {
|
|
continue
|
|
}
|
|
|
|
c, err := Dial(tt.net, tt.raddr)
|
|
if err != nil {
|
|
t.Fatalf("Dial failed: %v", err)
|
|
}
|
|
c.SetDeadline(time.Now().Add(100 * time.Millisecond))
|
|
defer c.Close()
|
|
|
|
typ := icmpv4EchoRequest
|
|
if net == "ip6" {
|
|
typ = icmpv6EchoRequest
|
|
}
|
|
xid, xseq := os.Getpid()&0xffff, i+1
|
|
b, err := (&icmpMessage{
|
|
Type: typ, Code: 0,
|
|
Body: &icmpEcho{
|
|
ID: xid, Seq: xseq,
|
|
Data: bytes.Repeat([]byte("Go Go Gadget Ping!!!"), 3),
|
|
},
|
|
}).Marshal()
|
|
if err != nil {
|
|
t.Fatalf("icmpMessage.Marshal failed: %v", err)
|
|
}
|
|
if _, err := c.Write(b); err != nil {
|
|
t.Fatalf("Conn.Write failed: %v", err)
|
|
}
|
|
var m *icmpMessage
|
|
for {
|
|
if _, err := c.Read(b); err != nil {
|
|
t.Fatalf("Conn.Read failed: %v", err)
|
|
}
|
|
if net == "ip4" {
|
|
b = ipv4Payload(b)
|
|
}
|
|
if m, err = parseICMPMessage(b); err != nil {
|
|
t.Fatalf("parseICMPMessage failed: %v", err)
|
|
}
|
|
switch m.Type {
|
|
case icmpv4EchoRequest, icmpv6EchoRequest:
|
|
continue
|
|
}
|
|
break
|
|
}
|
|
switch p := m.Body.(type) {
|
|
case *icmpEcho:
|
|
if p.ID != xid || p.Seq != xseq {
|
|
t.Fatalf("got id=%v, seqnum=%v; expected id=%v, seqnum=%v", p.ID, p.Seq, xid, xseq)
|
|
}
|
|
default:
|
|
t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, typ, 0)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestPacketConnICMPEcho(t *testing.T) {
|
|
if os.Getuid() != 0 {
|
|
t.Skip("skipping test; must be root")
|
|
}
|
|
|
|
for i, tt := range icmpEchoTests {
|
|
net, _, err := parseNetwork(tt.net)
|
|
if err != nil {
|
|
t.Fatalf("parseNetwork failed: %v", err)
|
|
}
|
|
if net == "ip6" && !supportsIPv6 {
|
|
continue
|
|
}
|
|
|
|
c, err := ListenPacket(tt.net, tt.laddr)
|
|
if err != nil {
|
|
t.Fatalf("ListenPacket failed: %v", err)
|
|
}
|
|
c.SetDeadline(time.Now().Add(100 * time.Millisecond))
|
|
defer c.Close()
|
|
|
|
ra, err := ResolveIPAddr(tt.net, tt.raddr)
|
|
if err != nil {
|
|
t.Fatalf("ResolveIPAddr failed: %v", err)
|
|
}
|
|
typ := icmpv4EchoRequest
|
|
if net == "ip6" {
|
|
typ = icmpv6EchoRequest
|
|
}
|
|
xid, xseq := os.Getpid()&0xffff, i+1
|
|
b, err := (&icmpMessage{
|
|
Type: typ, Code: 0,
|
|
Body: &icmpEcho{
|
|
ID: xid, Seq: xseq,
|
|
Data: bytes.Repeat([]byte("Go Go Gadget Ping!!!"), 3),
|
|
},
|
|
}).Marshal()
|
|
if err != nil {
|
|
t.Fatalf("icmpMessage.Marshal failed: %v", err)
|
|
}
|
|
if _, err := c.WriteTo(b, ra); err != nil {
|
|
t.Fatalf("PacketConn.WriteTo failed: %v", err)
|
|
}
|
|
var m *icmpMessage
|
|
for {
|
|
if _, _, err := c.ReadFrom(b); err != nil {
|
|
t.Fatalf("PacketConn.ReadFrom failed: %v", err)
|
|
}
|
|
// TODO: fix issue 3944
|
|
//if net == "ip4" {
|
|
// b = ipv4Payload(b)
|
|
//}
|
|
if m, err = parseICMPMessage(b); err != nil {
|
|
t.Fatalf("parseICMPMessage failed: %v", err)
|
|
}
|
|
switch m.Type {
|
|
case icmpv4EchoRequest, icmpv6EchoRequest:
|
|
continue
|
|
}
|
|
break
|
|
}
|
|
switch p := m.Body.(type) {
|
|
case *icmpEcho:
|
|
if p.ID != xid || p.Seq != xseq {
|
|
t.Fatalf("got id=%v, seqnum=%v; expected id=%v, seqnum=%v", p.ID, p.Seq, xid, xseq)
|
|
}
|
|
default:
|
|
t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, typ, 0)
|
|
}
|
|
}
|
|
}
|
|
|
|
func ipv4Payload(b []byte) []byte {
|
|
if len(b) < 20 {
|
|
return b
|
|
}
|
|
hdrlen := int(b[0]&0x0f) << 2
|
|
return b[hdrlen:]
|
|
}
|
|
|
|
const (
|
|
icmpv4EchoRequest = 8
|
|
icmpv4EchoReply = 0
|
|
icmpv6EchoRequest = 128
|
|
icmpv6EchoReply = 129
|
|
)
|
|
|
|
// icmpMessage represents an ICMP message.
|
|
type icmpMessage struct {
|
|
Type int // type
|
|
Code int // code
|
|
Checksum int // checksum
|
|
Body icmpMessageBody // body
|
|
}
|
|
|
|
// icmpMessageBody represents an ICMP message body.
|
|
type icmpMessageBody interface {
|
|
Len() int
|
|
Marshal() ([]byte, error)
|
|
}
|
|
|
|
// Marshal returns the binary enconding of the ICMP echo request or
|
|
// reply message m.
|
|
func (m *icmpMessage) Marshal() ([]byte, error) {
|
|
b := []byte{byte(m.Type), byte(m.Code), 0, 0}
|
|
if m.Body != nil && m.Body.Len() != 0 {
|
|
mb, err := m.Body.Marshal()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
b = append(b, mb...)
|
|
}
|
|
switch m.Type {
|
|
case icmpv6EchoRequest, icmpv6EchoReply:
|
|
return b, nil
|
|
}
|
|
csumcv := len(b) - 1 // checksum coverage
|
|
s := uint32(0)
|
|
for i := 0; i < csumcv; i += 2 {
|
|
s += uint32(b[i+1])<<8 | uint32(b[i])
|
|
}
|
|
if csumcv&1 == 0 {
|
|
s += uint32(b[csumcv])
|
|
}
|
|
s = s>>16 + s&0xffff
|
|
s = s + s>>16
|
|
// Place checksum back in header; using ^= avoids the
|
|
// assumption the checksum bytes are zero.
|
|
b[2] ^= byte(^s & 0xff)
|
|
b[3] ^= byte(^s >> 8)
|
|
return b, nil
|
|
}
|
|
|
|
// parseICMPMessage parses b as an ICMP message.
|
|
func parseICMPMessage(b []byte) (*icmpMessage, error) {
|
|
msglen := len(b)
|
|
if msglen < 4 {
|
|
return nil, errors.New("message too short")
|
|
}
|
|
m := &icmpMessage{Type: int(b[0]), Code: int(b[1]), Checksum: int(b[2])<<8 | int(b[3])}
|
|
if msglen > 4 {
|
|
var err error
|
|
switch m.Type {
|
|
case icmpv4EchoRequest, icmpv4EchoReply, icmpv6EchoRequest, icmpv6EchoReply:
|
|
m.Body, err = parseICMPEcho(b[4:])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
}
|
|
return m, nil
|
|
}
|
|
|
|
// imcpEcho represenets an ICMP echo request or reply message body.
|
|
type icmpEcho struct {
|
|
ID int // identifier
|
|
Seq int // sequence number
|
|
Data []byte // data
|
|
}
|
|
|
|
func (p *icmpEcho) Len() int {
|
|
if p == nil {
|
|
return 0
|
|
}
|
|
return 4 + len(p.Data)
|
|
}
|
|
|
|
// Marshal returns the binary enconding of the ICMP echo request or
|
|
// reply message body p.
|
|
func (p *icmpEcho) Marshal() ([]byte, error) {
|
|
b := make([]byte, 4+len(p.Data))
|
|
b[0], b[1] = byte(p.ID>>8), byte(p.ID&0xff)
|
|
b[2], b[3] = byte(p.Seq>>8), byte(p.Seq&0xff)
|
|
copy(b[4:], p.Data)
|
|
return b, nil
|
|
}
|
|
|
|
// parseICMPEcho parses b as an ICMP echo request or reply message
|
|
// body.
|
|
func parseICMPEcho(b []byte) (*icmpEcho, error) {
|
|
bodylen := len(b)
|
|
p := &icmpEcho{ID: int(b[0])<<8 | int(b[1]), Seq: int(b[2])<<8 | int(b[3])}
|
|
if bodylen > 4 {
|
|
p.Data = make([]byte, bodylen-4)
|
|
copy(p.Data, b[4:])
|
|
}
|
|
return p, nil
|
|
}
|
|
|
|
var ipConnLocalNameTests = []struct {
|
|
net string
|
|
laddr *IPAddr
|
|
}{
|
|
{"ip4:icmp", &IPAddr{IP: IPv4(127, 0, 0, 1)}},
|
|
{"ip4:icmp", &IPAddr{}},
|
|
{"ip4:icmp", nil},
|
|
}
|
|
|
|
func TestIPConnLocalName(t *testing.T) {
|
|
if os.Getuid() != 0 {
|
|
t.Skip("skipping test; must be root")
|
|
}
|
|
|
|
for _, tt := range ipConnLocalNameTests {
|
|
c, err := ListenIP(tt.net, tt.laddr)
|
|
if err != nil {
|
|
t.Fatalf("ListenIP failed: %v", err)
|
|
}
|
|
defer c.Close()
|
|
if la := c.LocalAddr(); la == nil {
|
|
t.Fatal("IPConn.LocalAddr failed")
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestIPConnRemoteName(t *testing.T) {
|
|
if os.Getuid() != 0 {
|
|
t.Skip("skipping test; must be root")
|
|
}
|
|
|
|
raddr := &IPAddr{IP: IPv4(127, 0, 0, 10).To4()}
|
|
c, err := DialIP("ip:tcp", &IPAddr{IP: IPv4(127, 0, 0, 1)}, raddr)
|
|
if err != nil {
|
|
t.Fatalf("DialIP failed: %v", err)
|
|
}
|
|
defer c.Close()
|
|
if !reflect.DeepEqual(raddr, c.RemoteAddr()) {
|
|
t.Fatalf("got %#v, expected %#v", c.RemoteAddr(), raddr)
|
|
}
|
|
}
|