func Ping(pi pingInfo) pingResponse {
pr := pingResponse{}
pr.err = nil
conn, err := icmp.ListenPacket("udp4", configuration.GetDeviceIP())
if err != nil {
msg := "Could not create a packet endpoint on ip: " + configuration.GetDeviceIP()
fmt.Println(err)
logger.WriteString(msg)
pr.err = errors.New(msg)
return pr
}
defer conn.Close()
logger.WriteString("Starting test number " + strconv.Itoa(sequence))
testNetwork(&pr, pi, conn)
testInternet(&pr, pi, conn)
// testDNS(&pr, pi, conn)
logger.WriteString("Finished test number " + strconv.Itoa(sequence))
sequence++
return pr
}
func Ping(ip *net.IPAddr, packetConn *icmp.PacketConn) (int, error) {
if ip == nil && &ip != nil {
error := errors.New("ip = nil ")
return 0, error
}
var duration int
var data []byte
var err error
timeNow := time.Now().Nanosecond()
if packetConn == nil {
packetConn, err = icmp.ListenPacket("ip4:icmp", "")
if err != nil {
log.Print("icmp ListenPacket error ")
}
}
errorCode, err := packetConn.WriteTo(data, ip)
duration = time.Now().Nanosecond() - timeNow
if errorCode == 0 {
return duration / 1000, nil
}
if err != nil {
return duration, err
}
return duration / 1000, err
}
func TestConcurrentNonPrivilegedListenPacket(t *testing.T) {
if testing.Short() {
t.Skip("avoid external network")
}
switch runtime.GOOS {
case "darwin":
case "linux":
t.Log("you may need to adjust the net.ipv4.ping_group_range kernel state")
default:
t.Skipf("not supported on %s", runtime.GOOS)
}
network, address := "udp4", "127.0.0.1"
if !nettest.SupportsIPv4() {
network, address = "udp6", "::1"
}
const N = 1000
var wg sync.WaitGroup
wg.Add(N)
for i := 0; i < N; i++ {
go func() {
defer wg.Done()
c, err := icmp.ListenPacket(network, address)
if err != nil {
t.Error(err)
return
}
c.Close()
}()
}
wg.Wait()
}
func (p *Pinger) listen(netProto string, source string) *icmp.PacketConn {
conn, err := icmp.ListenPacket(netProto, source)
if err != nil {
p.ctx.err = err
close(p.ctx.done)
return nil
}
return conn
}
func (p *Pinger) listen(netProto string, source string) *icmp.PacketConn {
conn, err := icmp.ListenPacket(netProto, source)
if err != nil {
fmt.Printf("Error listening for ICMP packets: %s\n", err.Error())
close(p.done)
return nil
}
return conn
}
func (self *HikarianIcmp) Run() {
if self.mode == "decrypt" {
clientConn, err := icmp.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
log.Fatal(err)
}
defer clientConn.Close()
for {
buf := make([]byte, 1024)
nr, caddr, err := clientConn.ReadFrom(buf)
request, err := icmp.ParseMessage(ProtocolICMP, buf)
if err != nil {
log.Println("parse icmp request error: ", err.Error())
return
}
if request.Code == 0 {
return
}
body, err := request.Body.Marshal(ProtocolICMP)
if err != nil {
log.Println("marshal body error: ", err.Error())
continue
}
hash := binary.BigEndian.Uint16(body[0:2]) + binary.BigEndian.Uint16(body[2:4])
dataChannel := self.DataChannelPool.Get(hash)
if dataChannel == nil {
dataChannel = make(chan []byte)
self.DataChannelPool.Set(hash, dataChannel)
go self.transportServer(clientConn, caddr, dataChannel)
}
if request.Code == MagicCode {
log.Println("receive magic")
dataChannel <- body[:nr-4]
}
}
} else if self.mode == "encrypt" {
client, err := net.ResolveTCPAddr("tcp", self.client)
if err != nil {
log.Fatalln("resolve client address error: ", err.Error())
}
l, err := net.ListenTCP("tcp", client)
if err != nil {
log.Fatal(err)
}
defer l.Close()
for {
clientConn, err := l.AcceptTCP()
if err != nil {
log.Println("accept error: ", err.Error())
continue
}
defer clientConn.Close()
go self.transportClient(clientConn)
}
}
}
// Monitor clients going in/out of sleep mode via ICMP unreachable packets.
func sleepMonitor() {
c, err := icmp.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
log.Printf("error listening for udp - sending data to all ports for all connected clients. err: %s", err)
return
}
go icmpEchoSender(c)
defer c.Close()
for {
buf := make([]byte, 1500)
n, peer, err := c.ReadFrom(buf)
if err != nil {
log.Printf("%s\n", err.Error())
continue
}
msg, err := icmp.ParseMessage(1, buf[:n])
if err != nil {
continue
}
ip := peer.String()
// Look for echo replies, mark it as received.
if msg.Type == ipv4.ICMPTypeEchoReply {
pingResponse[ip] = stratuxClock.Time
continue // No further processing needed.
}
// Only deal with ICMP Unreachable packets (since that's what iOS and Android seem to be sending whenever the apps are not available).
if msg.Type != ipv4.ICMPTypeDestinationUnreachable {
continue
}
// Packet parsing.
mb, err := msg.Body.Marshal(1)
if err != nil {
continue
}
if len(mb) < 28 {
continue
}
// The unreachable port.
port := (uint16(mb[26]) << 8) | uint16(mb[27])
ipAndPort := ip + ":" + strconv.Itoa(int(port))
netMutex.Lock()
p, ok := outSockets[ipAndPort]
if !ok {
// Can't do anything, the client isn't even technically connected.
netMutex.Unlock()
continue
}
p.LastUnreachable = stratuxClock.Time
outSockets[ipAndPort] = p
netMutex.Unlock()
}
}
func (p *Pinger) listen(netProto string) *icmp.PacketConn {
conn, err := icmp.ListenPacket(netProto, "")
if err != nil {
p.mu.Lock()
p.ctx.err = err
p.mu.Unlock()
p.debugln("Run(): close(p.ctx.done)")
close(p.ctx.done)
return nil
}
return conn
}
func newICMPLoop() (*icmpLoop, error) {
conn4, err := icmp.ListenPacket("ip4:icmp", "")
if err != nil {
return nil, err
}
conn6, err := icmp.ListenPacket("ip6:ipv6-icmp", "")
if err != nil {
conn4.Close()
return nil, err
}
l := &icmpLoop{
conn4: conn4,
conn6: conn6,
recv: make(chan packet, 16),
requests: map[requestID]*requestContext{},
}
go l.runICMPRecv(conn4, protocolICMP)
go l.runICMPRecv(conn6, protocolIPv6ICMP)
return l, nil
}
func main() {
timeout := 5
t1 := time.Now()
c, err := icmp.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
checkError(err, "listen err, ")
}
c.SetDeadline(t1.Add(time.Second * time.Duration(timeout)))
defer c.Close()
wm := icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: 1,
Data: []byte("HELLO-R-U-THERE"),
},
}
wb, err := wm.Marshal(nil)
if err != nil {
log.Fatal(err)
}
// Send ICMP echo and start timer
starttime := time.Now()
if _, err := c.WriteTo(wb, &net.IPAddr{IP: net.ParseIP(targetIP)}); err != nil {
log.Fatalf("WriteTo err, %s", err)
}
rb := make([]byte, 1500)
// Look for ICMP response and stop time
n, peer, err := c.ReadFrom(rb)
stoptime := time.Now()
if err != nil {
log.Fatal(err)
}
//rm, err := icmp.ParseMessage(iana.ProtocolICMP, rb[:n])
rm, err := icmp.ParseMessage(1, rb[:n])
if err != nil {
log.Fatal(err)
}
switch rm.Type {
case ipv4.ICMPTypeEchoReply:
log.Printf("got reflection from %v", peer)
log.Printf("ICMP echo request sent on ", starttime)
log.Printf("ICMP echo response received on ", stoptime)
default:
log.Printf("got %+v; want echo reply", rm)
}
}
func New(laddr, raddr string) (*ICMP, error) {
addr, err := net.ResolveIPAddr("ip4", laddr)
if err != nil {
return nil, err
}
listener, err := icmp.ListenPacket("ip4:icmp", addr.String())
if err != nil {
return nil, err
}
r, err := net.ResolveIPAddr("ip4", raddr)
i := &ICMP{
listener: listener,
raddr: r,
}
return i, nil
}
func ExamplePacketConn_nonPrivilegedPing() {
switch runtime.GOOS {
case "darwin":
case "linux":
log.Println("you may need to adjust the net.ipv4.ping_group_range kernel state")
default:
log.Println("not supported on", runtime.GOOS)
return
}
c, err := icmp.ListenPacket("udp6", "fe80::1%en0")
if err != nil {
log.Fatal(err)
}
defer c.Close()
wm := icmp.Message{
Type: ipv6.ICMPTypeEchoRequest, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: 1,
Data: []byte("HELLO-R-U-THERE"),
},
}
wb, err := wm.Marshal(nil)
if err != nil {
log.Fatal(err)
}
if _, err := c.WriteTo(wb, &net.UDPAddr{IP: net.ParseIP("ff02::1"), Zone: "en0"}); err != nil {
log.Fatal(err)
}
rb := make([]byte, 1500)
n, peer, err := c.ReadFrom(rb)
if err != nil {
log.Fatal(err)
}
rm, err := icmp.ParseMessage(58, rb[:n])
if err != nil {
log.Fatal(err)
}
switch rm.Type {
case ipv6.ICMPTypeEchoReply:
log.Printf("got reflection from %v", peer)
default:
log.Printf("got %+v; want echo reply", rm)
}
}
func init() {
var err error
conn, err = icmp.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
if err.Error() == "listen ip4:icmp 0.0.0.0: socket: operation not permitted" {
logger.Error("icmpping", "Please run:\nsudo setcap cap_net_raw=ep %s\n", os.Args[0])
} else {
logger.Error("icmpping", err.Error())
}
}
active = make(map[uint16]chan IcmpReply)
plugins.Register("icmp4", NewIcmpPing)
go ListenLoop()
}
// Send Echo-Request to remote host and wait Echo-Reply.
// raddr is an address of remote host.
func (i *ICMP4Pinger) Ping(raddr string) (Pong, error) {
message := icmp.Message{
Type: ipv4.ICMPTypeEcho,
Code: 0,
Body: &icmp.Echo{
ID: i.id,
Seq: i.counter,
},
}
i.counter++
listener, err := icmp.ListenPacket("ip4:icmp", i.laddr.String())
if err != nil {
return Pong{}, err
}
defer listener.Close()
addr, err := net.ResolveIPAddr("ip4", raddr)
if err != nil {
return Pong{}, err
}
return ping(listener, message, addr, i.timeout)
}
func ExamplePacketConn_nonPrivilegedPing() {
c, err := icmp.ListenPacket("udp6", "fe80::1%en0")
if err != nil {
log.Fatal(err)
}
defer c.Close()
wm := icmp.Message{
Type: ipv6.ICMPTypeEchoRequest, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: 1,
Data: []byte("HELLO-R-U-THERE"),
},
}
wb, err := wm.Marshal(nil)
if err != nil {
log.Fatal(err)
}
if _, err := c.WriteTo(wb, &net.UDPAddr{IP: net.ParseIP("ff02::1"), Zone: "en0"}); err != nil {
log.Fatal(err)
}
rb := make([]byte, 1500)
n, peer, err := c.ReadFrom(rb)
if err != nil {
log.Fatal(err)
}
rm, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, rb[:n])
if err != nil {
log.Fatal(err)
}
switch rm.Type {
case ipv6.ICMPTypeEchoReply:
log.Printf("got reflection from %v", peer)
default:
log.Printf("got %+v; want echo reply", rm)
}
}
func SetDevice(d string) {
var err error
conn, err = icmp.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
panic(err.Error())
}
queue = NewQueue()
pingServer = NewServer(d, ProcessId)
pingServer.Start()
c := make(chan IcmpEchoReply)
pingServer.ReceivingIcmp(c)
go func(c <-chan IcmpEchoReply) {
for e := range c {
k := fmt.Sprintf("%s:%d", e.srcIp, e.seq)
//log.Println(e.srcIp, ">", e.dstIp, e.seq, k)
p, ok := queue.Get(k)
if ok {
p.done <- k
}
}
}(c)
}
func doPing(host string, tt *Ping, seq int) error {
c, err := icmp.ListenPacket(tt.network, tt.address)
if err != nil {
return err
}
defer c.Close()
dst, err := getAddr(host, c, tt.protocol)
if err != nil {
return err
}
now := time.Now()
today := now.Truncate(24*time.Hour).UnixNano() / 1000000
transmitTime := uint32(now.UnixNano()/1000000 - today)
wm := icmp.Message{
Type: tt.mtype,
Code: 0,
Body: &Timestamp{
ID: os.Getpid() & 0xffff, Seq: 1 << uint(seq),
OriginTimestamp: transmitTime,
},
}
wb, err := wm.Marshal(nil)
if err != nil {
return err
}
if n, err := c.WriteTo(wb, dst); err != nil {
return err
} else if n != len(wb) {
return fmt.Errorf("got %v; want %v", n, len(wb))
}
rb := make([]byte, 1500)
if err := c.SetReadDeadline(time.Now().Add(3 * time.Second)); err != nil {
return err
}
n, peer, err := c.ReadFrom(rb)
if err != nil {
return err
}
receivedTime := time.Now().UnixNano()/1000000 - today
rm, err := icmp.ParseMessage(tt.protocol, rb[:n])
if err != nil {
return err
}
switch rm.Type {
case ipv4.ICMPTypeTimestampReply:
b, _ := rm.Body.Marshal(iana.ProtocolICMP)
ts, err := ParseTimestamp(b)
if err != nil {
fmt.Errorf("ParseTimestamp error: %s", err)
}
remoteReceiveTime := int64(ts.ReceiveTimestamp)
rtt := int64(math.Abs(float64(remoteReceiveTime - int64(transmitTime) + receivedTime - int64(ts.TransmitTimestamp))))
delta := rtt/2 + int64(transmitTime) - remoteReceiveTime
w := new(tabwriter.Writer)
w.Init(os.Stdout, 0, 4, 0, '\t', 0)
fmt.Fprintf(w, "ICMP timestamp:\tOriginate=%d Receive=%d Transmit=%d\n", ts.OriginTimestamp, ts.ReceiveTimestamp, ts.TransmitTimestamp)
fmt.Fprintf(w, "ICMP timestamp RTT:\ttsrtt=%d\n", rtt)
fmt.Fprintf(w, "Time difference:\tdelta=%d\n", delta)
w.Flush()
return nil
default:
return fmt.Errorf("got %+v from %v; want echo reply", rm, peer)
}
}
func probeICMP(target string, w http.ResponseWriter, module Module) (success bool) {
deadline := time.Now().Add(module.Timeout)
socket, err := icmp.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
log.Errorf("Error listening to socket: %s", err)
return
}
defer socket.Close()
ip, err := net.ResolveIPAddr("ip4", target)
if err != nil {
log.Errorf("Error resolving address %s: %s", target, err)
return
}
seq := getICMPSequence()
pid := os.Getpid() & 0xffff
wm := icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: pid, Seq: int(seq),
Data: []byte("Prometheus Blackbox Exporter"),
},
}
wb, err := wm.Marshal(nil)
if err != nil {
log.Errorf("Error marshalling packet for %s: %s", target, err)
return
}
if _, err := socket.WriteTo(wb, ip); err != nil {
log.Errorf("Error writing to socker for %s: %s", target, err)
return
}
rb := make([]byte, 1500)
if err := socket.SetReadDeadline(deadline); err != nil {
log.Errorf("Error setting socket deadline for %s: %s", target, err)
return
}
for {
n, peer, err := socket.ReadFrom(rb)
if err != nil {
if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
log.Infof("Timeout reading from socket for %s: %s", target, err)
return
}
log.Errorf("Error reading from socket for %s: %s", target, err)
continue
}
if peer.String() != ip.String() {
continue
}
rm, err := icmp.ParseMessage(iana.ProtocolICMP, rb[:n])
if err != nil {
log.Warnf("Error parsing ICMP message for %s: %s", target, err)
continue
}
if rm.Type == ipv4.ICMPTypeEchoReply {
// The ICMP package does not support unmarshalling
// messages, so assume this is the right sequence number.
success = true
return
}
}
return
}
func doPing(tt pingTest, seq int) error {
c, err := icmp.ListenPacket(tt.network, tt.address)
if err != nil {
return err
}
defer c.Close()
dst, err := googleAddr(c, tt.protocol)
if err != nil {
return err
}
if tt.protocol == iana.ProtocolIPv6ICMP {
var f ipv6.ICMPFilter
f.SetAll(true)
f.Accept(ipv6.ICMPTypeDestinationUnreachable)
f.Accept(ipv6.ICMPTypePacketTooBig)
f.Accept(ipv6.ICMPTypeTimeExceeded)
f.Accept(ipv6.ICMPTypeParameterProblem)
f.Accept(ipv6.ICMPTypeEchoReply)
if err := c.IPv6PacketConn().SetICMPFilter(&f); err != nil {
return err
}
}
wm := icmp.Message{
Type: tt.mtype, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: 1 << uint(seq),
Data: []byte("HELLO-R-U-THERE"),
},
}
wb, err := wm.Marshal(nil)
if err != nil {
return err
}
if n, err := c.WriteTo(wb, dst); err != nil {
return err
} else if n != len(wb) {
return fmt.Errorf("got %v; want %v", n, len(wb))
}
rb := make([]byte, 1500)
if err := c.SetReadDeadline(time.Now().Add(3 * time.Second)); err != nil {
return err
}
n, peer, err := c.ReadFrom(rb)
if err != nil {
return err
}
rm, err := icmp.ParseMessage(tt.protocol, rb[:n])
if err != nil {
return err
}
switch rm.Type {
case ipv4.ICMPTypeEchoReply, ipv6.ICMPTypeEchoReply:
return nil
default:
return fmt.Errorf("got %+v from %v; want echo reply", rm, peer)
}
}
func main() {
if len(os.Args) < 4 {
os.Exit(10)
}
hostfile := os.Args[1]
hdlr, err := os.Open(hostfile)
if err != nil {
fmt.Println(os.Stderr, "Failed to open with ", hostfile, err)
os.Exit(11)
}
defer hdlr.Close()
size, err := strconv.Atoi(os.Args[2])
if err != nil {
fmt.Println(os.Stderr, "Failed to convert with ", os.Args[2])
os.Exit(2)
}
intv, err := strconv.ParseUint(os.Args[3], 10, 64)
if err != nil {
fmt.Println(os.Stderr, "Failed to convert with ", os.Args[3])
os.Exit(7)
}
data := make([]byte, size)
for i := 0; i < size; i++ {
data[i] = uint8(i)
}
rand.Seed(time.Now().UnixNano())
exitch := make(chan int, 1)
collch := make(chan int, 1)
repch := make(chan int, 1)
pingnum := 0
scanner := bufio.NewScanner(hdlr)
for scanner.Scan() {
host := scanner.Text()
addr, err := net.ResolveIPAddr("ip4", host)
if err != nil {
fmt.Println(os.Stderr, "Failed to resolve with ", host, err)
os.Exit(1)
}
conn, err := icmp.ListenPacket("ip4:icmp", "")
if err != nil {
fmt.Println(os.Stderr, "Failed to listen ip4:icmp (%s)", err)
os.Exit(3)
}
defer conn.Close()
id := rand.Intn(65535)
p := &Ping{
PingNet{addr, conn},
PingData{id, data, size, intv},
PingNum{0, 0},
PingChan{exitch, collch},
}
go p.doPing()
pingnum += 1
}
sigch := make(chan os.Signal, 1)
signal.Notify(sigch, syscall.SIGINT)
allrecs := 0
go func() {
_ = <-sigch
close(exitch)
for i := 0; i < pingnum; i++ {
allrecs += <-collch
}
repch <- allrecs
}()
start := time.Now()
_ = <-exitch
finish := time.Now()
rep := <-repch
fmt.Println("")
fmt.Println("--- perfpinger statistics ---")
dur := finish.Sub(start).Seconds() / time.Second.Seconds()
thr := float64(rep) * (float64(size) * float64(pingnum) * 8) / (dur * 1024 * 2)
fmt.Printf("Total %d packets in %.2f sec : %.2f Kbps of both UL and DL.\n", rep, dur, thr)
}
// Pinger pings requested address.
// It returns nil when IcmpEchoReplay is recived, error otherwishe.
func Pinger(address string, timeout time.Duration) (err error) {
addr, err := net.ResolveIPAddr("ip", address)
if err != nil {
return err
}
network := "ip4:icmp"
if addr.IP.To4() == nil {
network = "ip6:ipv6-icmp"
}
c, err := icmp.ListenPacket(network, address)
if err != nil {
return err
}
defer func() {
if cerr := c.Close(); cerr != nil && err == nil {
err = cerr
}
}()
wm := icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: 1,
Data: []byte("ping"),
},
}
if addr.IP.To4() == nil {
wm.Type = ipv6.ICMPTypeEchoRequest
}
wb, err := wm.Marshal(nil)
if err != nil {
return err
}
if err := c.SetDeadline(time.Now().Add(timeout)); err != nil {
return err
}
if _, err = c.WriteTo(wb, addr); err != nil {
return err
}
rb := make([]byte, 1500)
n, _, err := c.ReadFrom(rb)
if err != nil {
return err
}
rm, err := icmp.ParseMessage(ProtocolICMP, rb[:n])
if err != nil {
return err
}
if addr.IP.To4() == nil {
if rm.Type == ipv6.ICMPTypeEchoReply {
return ErrNoImcpReplay
}
return nil
}
if rm.Type == ipv4.ICMPTypeEchoReply {
return ErrNoImcpReplay
}
return nil
}
// ListenICMP listens to incoming ICMP packet
func ListenICMP() (*icmp.PacketConn, error) {
return icmp.ListenPacket("ip4:icmp", "0.0.0.0")
}
func probeICMP(target string, w http.ResponseWriter, module Module) (success bool) {
var (
socket *icmp.PacketConn
requestType icmp.Type
replyType icmp.Type
fallbackProtocol string
)
deadline := time.Now().Add(module.Timeout)
// Defaults to IPv4 to be compatible with older versions
if module.ICMP.Protocol == "" {
module.ICMP.Protocol = "icmp"
}
// In case of ICMP prefer IPv6 by default
if module.ICMP.Protocol == "icmp" && module.ICMP.PreferredIpProtocol == "" {
module.ICMP.PreferredIpProtocol = "ip6"
}
if module.ICMP.Protocol == "icmp4" {
module.ICMP.PreferredIpProtocol = "ip4"
fallbackProtocol = ""
} else if module.ICMP.Protocol == "icmp6" {
module.ICMP.PreferredIpProtocol = "ip6"
fallbackProtocol = ""
} else if module.ICMP.PreferredIpProtocol == "ip6" {
fallbackProtocol = "ip4"
} else {
fallbackProtocol = "ip6"
}
ip, err := net.ResolveIPAddr(module.ICMP.PreferredIpProtocol, target)
if err != nil && fallbackProtocol != "" {
ip, err = net.ResolveIPAddr(fallbackProtocol, target)
}
if err != nil {
log.Errorf("Error resolving address %s: %s", target, err)
}
if ip.IP.To4() == nil {
requestType = ipv6.ICMPTypeEchoRequest
replyType = ipv6.ICMPTypeEchoReply
socket, err = icmp.ListenPacket("ip6:ipv6-icmp", "::")
fmt.Fprintf(w, "probe_ip_protocol 6\n")
} else {
requestType = ipv4.ICMPTypeEcho
replyType = ipv4.ICMPTypeEchoReply
socket, err = icmp.ListenPacket("ip4:icmp", "0.0.0.0")
fmt.Fprintf(w, "probe_ip_protocol 4\n")
}
if err != nil {
log.Errorf("Error listening to socket: %s", err)
return
}
defer socket.Close()
if err != nil {
log.Errorf("Error resolving address %s: %s", target, err)
return
}
seq := getICMPSequence()
pid := os.Getpid() & 0xffff
wm := icmp.Message{
Type: requestType,
Code: 0,
Body: &icmp.Echo{
ID: pid, Seq: int(seq),
Data: []byte("Prometheus Blackbox Exporter"),
},
}
wb, err := wm.Marshal(nil)
if err != nil {
log.Errorf("Error marshalling packet for %s: %s", target, err)
return
}
if _, err := socket.WriteTo(wb, ip); err != nil {
log.Errorf("Error writing to socker for %s: %s", target, err)
return
}
// Reply should be the same except for the message type.
wm.Type = replyType
wb, err = wm.Marshal(nil)
if err != nil {
log.Errorf("Error marshalling packet for %s: %s", target, err)
return
}
rb := make([]byte, 1500)
if err := socket.SetReadDeadline(deadline); err != nil {
log.Errorf("Error setting socket deadline for %s: %s", target, err)
return
}
for {
n, peer, err := socket.ReadFrom(rb)
if err != nil {
if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
log.Infof("Timeout reading from socket for %s: %s", target, err)
return
}
log.Errorf("Error reading from socket for %s: %s", target, err)
continue
}
if peer.String() != ip.String() {
continue
}
if replyType == ipv6.ICMPTypeEchoReply {
// Clear checksum to make comparison succeed.
rb[2] = 0
rb[3] = 0
}
if bytes.Compare(rb[:n], wb) == 0 {
success = true
return
}
}
}
func TestPingGoogle(t *testing.T) {
if testing.Short() {
t.Skip("to avoid external network")
}
switch runtime.GOOS {
case "darwin":
case "linux":
t.Log("you may need to adjust the net.ipv4.ping_group_range kernel state")
default:
t.Skipf("not supported on %q", runtime.GOOS)
}
for i, tt := range pingGoogleTests {
if tt.network[:2] == "ip" && os.Getuid() != 0 {
continue
}
c, err := icmp.ListenPacket(tt.network, tt.address)
if err != nil {
t.Error(err)
continue
}
defer c.Close()
dst, err := googleAddr(c, tt.protocol)
if err != nil {
t.Error(err)
continue
}
wm := icmp.Message{
Type: tt.mtype, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: 1 << uint(i),
Data: []byte("HELLO-R-U-THERE"),
},
}
wb, err := wm.Marshal(nil)
if err != nil {
t.Error(err)
continue
}
if n, err := c.WriteTo(wb, dst); err != nil {
t.Error(err, dst)
continue
} else if n != len(wb) {
t.Errorf("got %v; want %v", n, len(wb))
continue
}
rb := make([]byte, 1500)
n, peer, err := c.ReadFrom(rb)
if err != nil {
t.Error(err)
continue
}
rm, err := icmp.ParseMessage(tt.protocol, rb[:n])
if err != nil {
t.Error(err)
continue
}
switch rm.Type {
case ipv4.ICMPTypeEchoReply, ipv6.ICMPTypeEchoReply:
t.Logf("got reflection from %v", peer)
default:
t.Errorf("got %+v; want echo reply", rm)
}
}
}
func probeICMP(target string, w http.ResponseWriter, module Module) (success bool) {
deadline := time.Now().Add(module.Timeout)
socket, err := icmp.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
log.Errorf("Error listening to socket: %s", err)
return
}
defer socket.Close()
ip, err := net.ResolveIPAddr("ip4", target)
if err != nil {
log.Errorf("Error resolving address %s: %s", target, err)
return
}
seq := getICMPSequence()
pid := os.Getpid() & 0xffff
wm := icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: pid, Seq: int(seq),
Data: []byte("Prometheus Blackbox Exporter"),
},
}
wb, err := wm.Marshal(nil)
if err != nil {
log.Errorf("Error marshalling packet for %s: %s", target, err)
return
}
if _, err := socket.WriteTo(wb, ip); err != nil {
log.Errorf("Error writing to socker for %s: %s", target, err)
return
}
// Reply should be the same except for the message type.
wm.Type = ipv4.ICMPTypeEchoReply
wb, err = wm.Marshal(nil)
if err != nil {
log.Errorf("Error marshalling packet for %s: %s", target, err)
return
}
rb := make([]byte, 1500)
if err := socket.SetReadDeadline(deadline); err != nil {
log.Errorf("Error setting socket deadline for %s: %s", target, err)
return
}
for {
n, peer, err := socket.ReadFrom(rb)
if err != nil {
if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
log.Infof("Timeout reading from socket for %s: %s", target, err)
return
}
log.Errorf("Error reading from socket for %s: %s", target, err)
continue
}
if peer.String() != ip.String() {
continue
}
if bytes.Compare(rb[:n], wb) == 0 {
success = true
return
}
}
return
}
// Sends a single ICMP echo to an IP and returns success and latency information.
// Borrowed from BrianBrazil's blackbox exporter
func Ping(ip net.IP, maxRTT time.Duration) (success bool, latency time.Duration) {
deadline := time.Now().Add(maxRTT)
var socket *icmp.PacketConn
var err error
if isIPv4(ip) {
socket, err = icmp.ListenPacket("ip4:icmp", "0.0.0.0")
} else if isIPv6(ip) {
socket, err = icmp.ListenPacket("ip6:ipv6-icmp", "::")
} else {
log.Errorln("IP did not match any known types?")
return
}
if err != nil {
log.Errorf("Error listening to socket: %s", err)
return
}
defer socket.Close()
seq := getICMPSequence()
pid := os.Getpid() & 0xffff
// Build the packet
var wm icmp.Message
if isIPv4(ip) {
wm = icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: pid, Seq: int(seq),
Data: []byte("poller_exporter"),
},
}
} else if isIPv6(ip) {
wm = icmp.Message{
Type: ipv6.ICMPTypeEchoRequest, Code: 0,
Body: &icmp.Echo{
ID: pid, Seq: int(seq),
Data: []byte("poller_exporter"),
},
}
} else {
log.Errorln("IP did not match any known types?")
return
}
wb, err := wm.Marshal(nil)
if err != nil {
log.Errorf("Error marshalling packet for %s: %s", ip.String(), err)
return
}
sendTime := time.Now()
var dst *net.IPAddr
dst = &net.IPAddr{IP: ip}
if _, err := socket.WriteTo(wb, dst); err != nil {
log.Errorf("Error writing to socket for %s: %s", ip.String(), err)
return
}
// Reply should be the same except for the message type.
if isIPv4(ip) {
wm.Type = ipv4.ICMPTypeEchoReply
} else if isIPv6(ip) {
wm.Type = ipv6.ICMPTypeEchoReply
} else {
log.Errorln("IP did not match any known types?")
return
}
wb, err = wm.Marshal(nil)
if err != nil {
log.Errorf("Error marshalling packet for %s: %s", ip.String(), err)
return
}
rb := make([]byte, 1500)
if err := socket.SetReadDeadline(deadline); err != nil {
log.Errorf("Error setting socket deadline for %s: %s", ip.String(), err)
return
}
for {
n, peer, err := socket.ReadFrom(rb)
if err != nil {
if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
log.Infof("Timeout reading from socket for %s: %s", ip.String(), err)
return
}
log.Errorf("Error reading from socket for %s: %s", ip.String(), err)
continue
}
if peer.String() != ip.String() {
continue
}
if bytes.Compare(rb[:n], wb) == 0 {
success = true
latency = time.Now().Sub(sendTime)
return
}
}
return
}
// ICMPReceiver runs on its own collecting ICMP responses until its explicitly told to stop
func ICMPReceiver(done <-chan struct{}, af string, srcAddr net.IP) (chan interface{}, error) {
var (
minInnerIPHdrSize int
icmpMsgType byte
listenNet string
)
switch af {
case "ip4":
minInnerIPHdrSize = minIP4HeaderSize // the size of the original IPv4 header that was on the TCP packet sent out
icmpMsgType = 11 // time to live exceeded
listenNet = "ip4:1" // IPv4 ICMP proto number
case "ip6":
minInnerIPHdrSize = ip6HeaderSize // the size of the original IPv4 header that was on the TCP packet sent out
icmpMsgType = 3 // time to live exceeded
listenNet = "ip6:58" // IPv6 ICMP proto number
default:
return nil, fmt.Errorf("sender: unsupported network %q", af)
}
conn, err := icmp.ListenPacket(listenNet, srcAddr.String())
if err != nil {
return nil, err
}
glog.V(2).Infoln("ICMPReceiver is starting...")
recv := make(chan interface{})
go func() {
// TODO: remove hardcode; 20 bytes for IP header, 8 bytes for ICMP header, 8 bytes for TCP header
packet := make([]byte, icmpHdrSize+maxIP4HeaderSize+maxTCPHdrSize)
for {
n, from, err := conn.ReadFrom(packet)
if err != nil {
break
}
// extract the 8 bytes of the original TCP header
if n < icmpHdrSize+minInnerIPHdrSize+minTCPHdrSize {
continue
}
// not ttl exceeded
if packet[0] != icmpMsgType || packet[1] != 0 {
continue
}
glog.V(4).Infof("Received ICMP response message %d: %x\n", n, packet[:n])
tcpHdr := parseTCPHeader(packet[icmpHdrSize+minInnerIPHdrSize : n])
// extract ttl bits from the ISN
ttl := int(tcpHdr.SeqNum) >> 24
// extract the timestamp from the ISN
ts := tcpHdr.SeqNum & 0x00ffffff
// scale the current time
now := uint32(time.Now().UnixNano()/(1000*1000)) & 0x00ffffff
recv <- ICMPResponse{Probe: Probe{srcPort: int(tcpHdr.Source), ttl: ttl}, fromAddr: net.ParseIP(from.String()), rtt: now - ts}
}
}()
out := make(chan interface{})
go func() {
defer conn.Close()
defer close(out)
for {
select {
// read ICMP struct
case response := <-recv:
out <- response
case <-done:
glog.V(2).Infoln("ICMPReceiver done")
return
}
}
}()
return out, nil
}
func main() {
timeout := flag.Int("t", 5, "timeout for ttl")
concurrent := flag.Int("c", 100, "concurrent for each channel")
maxPing := flag.Int("m", 5000000, "max ips number")
log.Print(maxPing)
flag.Parse()
//初始化状态判定
switch runtime.GOOS {
case "darwin":
case "linux":
log.Println("you may need to adjust the net.ipv4.ping_group_range kernel state")
default:
log.Fatal("Not supported Device")
}
//数据库链接初始化
session, err := mgo.Dial(config.MongodbIP)
if err != nil {
panic(err)
}
session.SetMode(mgo.Monotonic, true)
connectMongoDB := session.DB("pingvalue").C("ping")
log.Print(connectMongoDB)
//初始化存储结果的缓存区域
resultCache := ResultCache{cache: make(map[string]PingResult)}
//初始化ip缓存
// IPPing_Map := make(map[string]*PingResult)
ch_ping := make(chan string, *concurrent)
ch_pingResult := make(chan PingResult, *concurrent)
ch_lock := make(chan struct{}, *concurrent)
var finishedNumber int
log.Print(finishedNumber)
c, err := icmp.ListenPacket("udp4", localAddr)
if err != nil {
log.Fatal(err)
}
defer c.Close()
go func() {
// 程序退出时关闭file
f, err := os.Open(file)
if err != nil {
log.Panicf("File open error:%v", err)
}
defer f.Close()
reader := csv.NewReader(f)
for {
record, err := reader.Read()
if err == io.EOF {
break
} else if err != nil {
fmt.Println("Error:", err)
log.Panic("File error")
}
// fmt.Println(record[0]) // record has the type []string
netAddr := strings.Split(record[0], ".")
for i := 1; i < 256; i++ {
netAddr[3] = strconv.Itoa(i)
ch_ping <- strings.Join(netAddr, ".")
}
}
}()
//读取监听的数据流
go func(c *icmp.PacketConn) {
defer func() {
fmt.Printf("return ")
}()
for {
rb := make([]byte, 1500)
_, peer, err := c.ReadFrom(rb)
if err != nil {
continue
} else {
ipaddr, _, _ := net.SplitHostPort(peer.String())
if err := resultCache.UpdateTTL(ipaddr, time.Now()); err != nil {
log.Printf("%v", err)
}
}
}
}(c)
for {
select {
case result := <-ch_pingResult:
log.Printf("Prepare to save : %v", result)
// err:=connectMongoDB.Insert(&result)
// if err!=nil {
// log.Printf("Error : %v",err)
// }else{
// log.Printf("Save success")
// finishedNumber++
// if finishedNumber>*maxPing {
// return
// }else{
// log.Print(finishedNumber)
// }
// }
case ip := <-ch_ping:
// resultCache.New(ip)
// fmt.Print(ip)
go Send_UDP_Ping(c, ip, *concurrent, *timeout, ch_lock, &resultCache)
}
}
}
