// This is simple send function here i communicate with raft using simple request-response socket and ask to raft their status
// like phase of raft and we can also close raft server using this function.
// Here msg :- 1 means msg for ask phase of server and msg:- 0 means close the raft server
func send(msg string, requester_C *zmq.Socket) string {
// Decoding of phse receive by type 0 msg is 0 :- Follower, 1:- Candidate, 2:- Leader
// By default phase :- "3" means no response from server and server is close
requester_C.Send(msg, 0)
phase := "3"
if msg == "0" {
return "0"
}
phase, _ = requester_C.Recv(0)
type1 := s.Split(phase, " ")[0]
value := s.Split(phase, " ")[1]
if type1 == "-1" {
if value == "0" {
phase = "Follower"
} else if value == "1" {
phase = "Candidate"
} else if value == "2" {
phase = "Leader"
}
} else if type1 == "-2" {
leaderId, _ = strconv.Atoi(value)
} else if type1 == "0" {
leaderId, _ = strconv.Atoi(s.Split(phase, " ")[2])
msg_index, _ := strconv.Atoi(value)
send(message[msg_index], requester[leaderId-1])
return "0"
} else {
}
return phase
}
func snapshots(socket *zmq.Socket, srv *clonesrv_t) (err error) {
msg, err := socket.RecvMessage(0)
if err != nil {
return
}
identity := msg[0]
// Request is in second frame of message
request := msg[1]
if request != "ICANHAZ?" {
err = errors.New("E: bad request, aborting")
return
}
subtree := msg[2]
// Send state socket to client
for _, kvmsg := range srv.kvmap {
if key, _ := kvmsg.GetKey(); strings.HasPrefix(key, subtree) {
socket.Send(identity, zmq.SNDMORE)
kvmsg.Send(socket)
}
}
// Now send END message with sequence number
log.Println("I: sending shapshot =", srv.sequence)
socket.Send(identity, zmq.SNDMORE)
kvmsg := kvmsg.NewKvmsg(srv.sequence)
kvmsg.SetKey("KTHXBAI")
kvmsg.SetBody(subtree)
kvmsg.Send(socket)
return
}
func r(replier *zmq.Socket) {
for {
got, _ := replier.Recv(0)
log.Println("Received", got)
replier.Send(`{"jsonrpc":"2.0","id":"youpi","result":{"name":"test","hostname":"localtest","protocol":"test","port":0}}`, 0)
}
}
// SendReply will send the reply back to the connected reply proxy
func SendReply(r *http.Response, body string, repsock *zmq.Socket) {
rep := &messages.Reply{StatusCode: r.StatusCode, Body: body, Headers: r.Header}
reps := rep.String()
fmt.Printf("[PRIVATE] sending %d bytes or \n----\n%s\n-----\n", len(reps), reps)
repsock.Send(reps, 0)
fmt.Printf("[PRIVATE] sent %d bytes\n", len(reps))
}
// ZmqSendMulti Sends a slice of strings as a multi-part message
func ZmqSendMulti(s *zmq.Socket, msg []string) {
lastIdx := len(msg) - 1
for idx, part := range msg {
if idx == lastIdx {
s.Send(part, 0)
} else {
s.Send(part, zmq.SNDMORE)
}
}
}
/******************************************************************************
* 概述： 订阅退订
* 函数名： dealCmd
* 返回值：
* 参数列表： 参数名 参数类型 取值范围 描述
*
*******************************************************************************/
func (this *ZmqSocket) dealCmd(cmdSocket *zmq4.Socket) (int, error) {
log4.Debug("start deal cmd...")
for { //半包处理
cmdsStr, err0 := cmdSocket.Recv(zmq4.DONTWAIT)
if err0 != nil {
errno1 := zmq4.AsErrno(err0)
switch errno1 {
case zmq4.Errno(syscall.EAGAIN):
return 0, nil
case zmq4.Errno(syscall.EINTR):
continue
default:
log4.Debug("zmq req Get err %v, %d!", errno1, errno1)
}
}
if len(cmdsStr) == 0 {
log4.Debug("deal cmd return")
return 0, nil
}
ss := strings.Split(cmdsStr, " ")
log4.Debug("recv cmd %s", cmdsStr)
for i := 0; i < len(ss); i++ {
if len(ss[i]) == 0 {
continue
}
if ss[i] == "stop" {
// log4.Debug("recv cmd will stop %s %s", this.mreqUrl, this.msubUrl)
cmdSocket.Send("0", 0)
return 1, nil
}
if !this.mChoose {
// log4.Debug("recv cmd ,but notChoose so return")
return 0, nil
}
if ss[i][0] == 'r' {
if err := this.msubSocket.SetSubscribe(ss[i][1:]); err != nil {
log4.Error("SetSubscribe(%s) falied, %s", ss[i][1:], err.Error())
return 0, err
}
log4.Debug("setSubscribe ok %s", ss[i][1:])
continue
}
if ss[i][0] == 'u' {
if err := this.msubSocket.SetUnsubscribe(ss[i][1:]); err != nil {
log4.Error("SetUnSubscribe(%s) falied, %s", ss[i][1:], err.Error())
return 0, err
}
log4.Debug("setUnSubscribe ok %s", ss[i][1:])
continue
}
}
}
return 0, nil
}
func send(socket *zmq.Socket, update keyUpdate) error {
var err error
if _, err = socket.Send(update.key, zmq.SNDMORE); err != nil {
return err
}
if _, err = socket.SendBytes(update.payload, 0); err != nil {
return err
}
return nil
}
func sendToClient(message string, header []string, title string, more zmq.Flag, frontend *zmq.Socket) {
//fmt.Println("\t", title)
for key := range header {
//fmt.Printf("\tSending to client: %s\n", header[key])
frontend.Send(header[key], zmq.SNDMORE)
}
//fmt.Printf("\tSending to client: %s\n", message)
frontend.Send(message, more)
//fmt.Println("\tDone")
}
// args:
// - addr: multicast group/address to listen to
// - port: port number; addr:port builds the mcast socket
// - iface: name of network interface to listen to
// - d_dl_sock:
// - stopch:
func ListenUDPMcast(addr, port, iface string, d_dl_sock *zmq.Socket,
stopch chan bool) {
eth, err := net.InterfaceByName(iface)
if err != nil {
fmt.Println("Error interface:", err.Error())
os.Exit(1)
}
group := net.ParseIP(addr)
if group == nil {
fmt.Println("Error: invalid group address:", addr)
os.Exit(1)
}
// listen to all udp packets on mcast port
c, err := net.ListenPacket("udp4", "0.0.0.0:"+port)
if err != nil {
fmt.Println("Error listening for mcast:", err.Error())
os.Exit(1)
}
// close the listener when the application closes
defer c.Close()
// join mcast group
p := ipv4.NewPacketConn(c)
if err := p.JoinGroup(eth, &net.UDPAddr{IP: group}); err != nil {
fmt.Println("Error joining:", err.Error())
os.Exit(1)
}
fmt.Println("Listening on " + addr + ":" + port)
// enable transmissons of control message
if err := p.SetControlMessage(ipv4.FlagDst, true); err != nil {
fmt.Println("Error control message", err.Error())
}
c1 := devreader.MakeChannel(UMSocket{p, group})
LOOP:
for {
select {
case v1 := <-c1:
fmt.Println("received UDP multicast")
// forward to coord node
d_dl_sock.Send(string(v1), 0)
case <-stopch:
break LOOP
}
}
}
func sendData(socket *zmq.Socket, key string, data interface{}, kind string) {
bs, err := json.Marshal(data)
if err != nil {
abort(err, "could not marshal data")
}
encoded_data := string(bs)
msg_key := fmt.Sprintf("%s-%s,%s", opts.App, opts.Env, key)
if _, err := socket.Send(msg_key, zmq.DONTWAIT|zmq.SNDMORE); err != nil {
abort(err, "could not send message part 1")
}
if _, err := socket.Send(encoded_data, zmq.DONTWAIT); err != nil {
abort(err, "could not send message part 2")
}
if opts.Verbose {
fmt.Printf("KEY: %s\n%s: %s\n", key, kind, encoded_data)
}
}
func solve(hand string, sock *zmq.Socket) []string {
req := &scrabble.Request{Hand: hand}
reqMsg, err := proto.Marshal(req)
condlog.Fatal(err, "Unable to marshal message")
_, err = sock.Send(string(reqMsg), 0)
condlog.Fatal(err, "Unable to marshal message")
resMsg, err := sock.Recv(0)
condlog.Fatal(err, "Unable to receive response")
res := &scrabble.Response{}
err = proto.Unmarshal([]byte(resMsg), res)
condlog.Fatal(err, "Unable to unmarshal request")
return res.Words
}
// This is simple send function here i communicate with raft using simple request-response socket and ask to raft their status
// like phase of raft and we can also close raft server using this function.
// Here msg :- 1 means msg for ask phase of server and msg:- 0 means close the raft server
func send(msg int, requester *zmq.Socket) string {
// Decoding of phse receive by type 0 msg is 0 :- Follower, 1:- Candidate, 2:- Leader
// By default phase :- "3" means no response from server and server is close
phase := "3"
requester.Send(fmt.Sprintf("%d", msg), 0)
if msg == 1 {
phase, _ = requester.Recv(0)
}
if phase == "0" {
phase = "Follower"
} else if phase == "1" {
phase = "Candidate"
} else if phase == "2" {
phase = "Leader"
}
return phase
}
func serve(sock *zmq.Socket, solv *Solver) {
for {
requestMsg, err := sock.Recv(0)
condlog.Fatal(err, "Unable to receive request")
request := &scrabble.Request{}
err = proto.Unmarshal([]byte(requestMsg), request)
condlog.Fatal(err, "Unable to unmarshal request")
result := solv.Solve(request.Hand)
response := &scrabble.Response{Words: result}
responseMsg, err := proto.Marshal(response)
condlog.Fatal(err, "Unable to marshal response")
_, err = sock.Send(string(responseMsg), 0)
condlog.Fatal(err, "Unable to send response")
}
}
func SendToClient(signature, error_status, message string, frontend *zmq.Socket) {
fmt.Printf("\tSending signature to client: %s\n", signature)
frontend.Send(signature, zmq.SNDMORE)
fmt.Printf("\tSending errorstatus to client: %s\n", error_status)
frontend.Send(error_status, zmq.SNDMORE)
fmt.Printf("\tSending message to client: %s\n", message)
frontend.Send(message, 0)
}
func TestConflate(t *testing.T) {
var s_in, s_out *zmq.Socket
defer func() {
for _, s := range []*zmq.Socket{s_in, s_out} {
if s != nil {
s.SetLinger(0)
s.Close()
}
}
}()
bind_to := "tcp://127.0.0.1:5555"
err := zmq.SetIoThreads(1)
if err != nil {
t.Fatal("SetIoThreads(1):", err)
}
s_in, err = zmq.NewSocket(zmq.PULL)
if err != nil {
t.Fatal("NewSocket 1:", err)
}
err = s_in.SetConflate(true)
if err != nil {
t.Fatal("SetConflate(true):", err)
}
err = s_in.Bind(bind_to)
if err != nil {
t.Fatal("s_in.Bind:", err)
}
s_out, err = zmq.NewSocket(zmq.PUSH)
if err != nil {
t.Fatal("NewSocket 2:", err)
}
err = s_out.Connect(bind_to)
if err != nil {
t.Fatal("s_out.Connect:", err)
}
message_count := 20
for j := 0; j < message_count; j++ {
_, err = s_out.Send(fmt.Sprint(j), 0)
if err != nil {
t.Fatalf("s_out.Send %d: %v", j, err)
}
}
time.Sleep(time.Second)
payload_recved, err := s_in.Recv(0)
if err != nil {
t.Error("s_in.Recv:", err)
} else {
i, err := strconv.Atoi(payload_recved)
if err != nil {
t.Error("strconv.Atoi:", err)
}
if i != message_count-1 {
t.Error("payload_recved != message_count - 1")
}
}
err = s_in.Close()
s_in = nil
if err != nil {
t.Error("s_in.Close:", err)
}
err = s_out.Close()
s_out = nil
if err != nil {
t.Error("s_out.Close:", err)
}
}
func bounce(server, client *zmq.Socket) (msg string, err error) {
content := "12345678ABCDEFGH12345678abcdefgh"
// Send message from client to server
rc, err := client.Send(content, zmq.SNDMORE|zmq.DONTWAIT)
if err != nil {
return "client.Send SNDMORE|DONTWAIT:", err
}
if rc != 32 {
return "client.Send SNDMORE|DONTWAIT:", err32
}
rc, err = client.Send(content, zmq.DONTWAIT)
if err != nil {
return "client.Send DONTWAIT:", err
}
if rc != 32 {
return "client.Send DONTWAIT:", err32
}
// Receive message at server side
msg, err = server.Recv(0)
if err != nil {
return "server.Recv 1:", err
}
// Check that message is still the same
if msg != content {
return "server.Recv 1:", errors.New(fmt.Sprintf("%q != %q", msg, content))
}
rcvmore, err := server.GetRcvmore()
if err != nil {
return "server.GetRcvmore 1:", err
}
if !rcvmore {
return "server.GetRcvmore 1:", errors.New(fmt.Sprint("rcvmore ==", rcvmore))
}
// Receive message at server side
msg, err = server.Recv(0)
if err != nil {
return "server.Recv 2:", err
}
// Check that message is still the same
if msg != content {
return "server.Recv 2:", errors.New(fmt.Sprintf("%q != %q", msg, content))
}
rcvmore, err = server.GetRcvmore()
if err != nil {
return "server.GetRcvmore 2:", err
}
if rcvmore {
return "server.GetRcvmore 2:", errors.New(fmt.Sprint("rcvmore == ", rcvmore))
}
// The same, from server back to client
// Send message from server to client
rc, err = server.Send(content, zmq.SNDMORE)
if err != nil {
return "server.Send SNDMORE:", err
}
if rc != 32 {
return "server.Send SNDMORE:", err32
}
rc, err = server.Send(content, 0)
if err != nil {
return "server.Send 0:", err
}
if rc != 32 {
return "server.Send 0:", err32
}
// Receive message at client side
msg, err = client.Recv(0)
if err != nil {
return "client.Recv 1:", err
}
// Check that message is still the same
if msg != content {
return "client.Recv 1:", errors.New(fmt.Sprintf("%q != %q", msg, content))
}
rcvmore, err = client.GetRcvmore()
if err != nil {
return "client.GetRcvmore 1:", err
}
if !rcvmore {
return "client.GetRcvmore 1:", errors.New(fmt.Sprint("rcvmore ==", rcvmore))
}
// Receive message at client side
msg, err = client.Recv(0)
if err != nil {
return "client.Recv 2:", err
}
// Check that message is still the same
if msg != content {
return "client.Recv 2:", errors.New(fmt.Sprintf("%q != %q", msg, content))
}
rcvmore, err = client.GetRcvmore()
if err != nil {
return "client.GetRcvmore 2:", err
}
if rcvmore {
return "client.GetRcvmore 2:", errors.New(fmt.Sprint("rcvmore == ", rcvmore))
}
return "OK", nil
}
func TestPoller(t *testing.T) {
var sb, sc *zmq.Socket
defer func() {
for _, s := range []*zmq.Socket{sb, sc} {
if s != nil {
s.SetLinger(0)
s.Close()
}
}
}()
sb, err := zmq.NewSocket(zmq.PAIR)
if err != nil {
t.Fatal("NewSocket:", err)
}
err = sb.Bind("tcp://127.0.0.1:9737")
if err != nil {
t.Fatal("sb.Bind:", err)
}
sc, err = zmq.NewSocket(zmq.PAIR)
if err != nil {
t.Fatal("NewSocket:", err)
}
err = sc.Connect("tcp://127.0.0.1:9737")
if err != nil {
t.Fatal("sc.Connect:", err)
}
poller := zmq.NewPoller()
idxb := poller.Add(sb, 0)
idxc := poller.Add(sc, 0)
if idxb != 0 || idxc != 1 {
t.Errorf("idxb=%d idxc=%d", idxb, idxc)
}
if pa, err := poller.PollAll(100 * time.Millisecond); err != nil {
t.Error("PollAll 1:", err)
} else if len(pa) != 2 {
t.Errorf("PollAll 1 len = %d", len(pa))
} else if pa[0].Events != 0 || pa[1].Events != 0 {
t.Errorf("PollAll 1 events = %v, %v", pa[0], pa[1])
}
poller.Update(idxb, zmq.POLLOUT)
poller.UpdateBySocket(sc, zmq.POLLIN)
if pa, err := poller.PollAll(100 * time.Millisecond); err != nil {
t.Error("PollAll 2:", err)
} else if len(pa) != 2 {
t.Errorf("PollAll 2 len = %d", len(pa))
} else if pa[0].Events != zmq.POLLOUT || pa[1].Events != 0 {
t.Errorf("PollAll 2 events = %v, %v", pa[0], pa[1])
}
poller.UpdateBySocket(sb, 0)
content := "12345678ABCDEFGH12345678ABCDEFGH"
// Send message from client to server
if rc, err := sb.Send(content, zmq.DONTWAIT); err != nil {
t.Error("sb.Send DONTWAIT:", err)
} else if rc != 32 {
t.Error("sb.Send DONTWAIT:", err32)
}
if pa, err := poller.PollAll(100 * time.Millisecond); err != nil {
t.Error("PollAll 3:", err)
} else if len(pa) != 2 {
t.Errorf("PollAll 3 len = %d", len(pa))
} else if pa[0].Events != 0 || pa[1].Events != zmq.POLLIN {
t.Errorf("PollAll 3 events = %v, %v", pa[0], pa[1])
}
// Receive message
if msg, err := sc.Recv(zmq.DONTWAIT); err != nil {
t.Error("sb.Recv DONTWAIT:", err)
} else if msg != content {
t.Error("sb.Recv msg != content")
}
poller.UpdateBySocket(sb, zmq.POLLOUT)
poller.Update(idxc, zmq.POLLIN)
if pa, err := poller.PollAll(100 * time.Millisecond); err != nil {
t.Error("PollAll 4:", err)
} else if len(pa) != 2 {
t.Errorf("PollAll 4 len = %d", len(pa))
} else if pa[0].Events != zmq.POLLOUT || pa[1].Events != 0 {
t.Errorf("PollAll 4 events = %v, %v", pa[0], pa[1])
}
err = sc.Close()
sc = nil
if err != nil {
t.Error("sc.Close:", err)
}
err = sb.Close()
sb = nil
if err != nil {
t.Error("sb.Close:", err)
}
}
// Send a request to a service
func SendRequest(service Service, request, message string) (reply []string, err error) {
// Bind to service if not already done
var requester *zmq.Socket
fmt.Println("Connecting to '", service.Name, "'' at '", service.Address, "'...")
requester, err = zmq.NewSocket(zmq.REQ)
if err != nil {
log.Println(err)
return
}
requester.Connect(service.Address)
poller := zmq.NewPoller()
poller.Add(requester, zmq.POLLIN)
retries_left := REQUEST_RETRIES
request_timeout := REQUEST_TIMEOUT
if request == PPP_HEARTBEAT {
retries_left = 1
request_timeout = 1500 * time.Millisecond
}
for retries_left > 0 {
// Send message
// The service required in first packet of envelope
// The message for given service in second packet of envelope
// Heartbeat messages only contain one message in envelope
if request == PPP_HEARTBEAT {
_, err = requester.Send(PPP_HEARTBEAT, 0)
} else {
_, err = requester.Send(request, zmq.SNDMORE)
_, err = requester.Send(message, 0)
}
for expect_reply := true; expect_reply; {
// Poll socket for a reply, with timeout
var sockets []zmq.Polled
sockets, err = poller.Poll(request_timeout)
if err != nil {
break // Interrupted
}
// Wait to receive reply if there are no more messages to send
if len(sockets) > 0 {
// Receive all replies in the envelope before processing
var more bool
for count := 0; ; count++ {
var rep string
rep, err = requester.Recv(0)
if err != nil {
retries_left--
break
}
reply = append(reply, rep)
// Unpacking three parts from the message envelope
// The first part: the expected service reply signature
// The second part is either:
// a. error state (empty if no error) OR
// b. the heartbeat reply of the server
// The third part: the actual message
if count == 0 && rep != service.Reply {
err = errors.New("ServiceListOutdated:Bound to wrong service")
retries_left = 0
break
}
if count == 1 && rep != "" && rep != PPP_READY {
err = errors.New(rep)
retries_left = 0
break
}
// Break from loop if there are no more messages or
// an error condition occurs
more, err = requester.GetRcvmore()
if !more || err != nil {
retries_left--
break
}
}
// If there was an error retrieving the message, then we
// should still expect replies
if err != nil {
break
}
// All messages retrieved from packet successfully
// Leave the retrieve/retry loops
retries_left = 0
expect_reply = false
} else {
retries_left--
if retries_left == 0 {
if err == nil {
err = errors.New("Error:TimeOut")
}
requester.Close()
return
} else {
err = nil
reply = nil
fmt.Println("No response from server, retrying...")
// Old socket is confused; close it and open a new one
requester.Close()
requester, _ = zmq.NewSocket(zmq.REQ)
requester.Connect(service.Address)
// Recreate poller for new client
poller = zmq.NewPoller()
poller.Add(requester, zmq.POLLIN)
// Send request again, on the new socket
if request == PPP_HEARTBEAT {
_, err = requester.Send(PPP_HEARTBEAT, 0)
} else {
_, err = requester.Send(request, zmq.SNDMORE)
_, err = requester.Send(message, 0)
}
}
}
}
}
fmt.Println("\tReceived: ", reply)
// Deall with invalid/distorted replies first
// Followed by heartbeat replies
// Then package reply for return to the function caller
if len(reply) < 2 {
err = errors.New(fmt.Sprintf("Error:UnexpectedReply:%s", err))
requester.Close()
return
}
if reply[1] == PPP_READY {
reply = append(reply, reply[1])
}
reply = reply[2:]
requester.Close()
return
}
func bounce(server, client *zmq.Socket, willfail bool) {
content := "12345678ABCDEFGH12345678abcdefgh"
// Send message from client to server
rc, err := client.Send(content, zmq.SNDMORE|zmq.DONTWAIT)
if checkErr0(err, 1) {
return
}
if rc != 32 {
checkErr0(errors.New("rc != 32"), 2)
}
rc, err = client.Send(content, zmq.DONTWAIT)
if checkErr0(err, 3) {
return
}
if rc != 32 {
checkErr0(errors.New("rc != 32"), 4)
}
// Receive message at server side
msg, err := server.Recv(0)
if checkErr0(e(err, willfail), 5) {
return
}
// Check that message is still the same
if msg != content {
checkErr0(errors.New(fmt.Sprintf("%q != %q", msg, content)), 6)
}
rcvmore, err := server.GetRcvmore()
if checkErr0(err, 7) {
return
}
if !rcvmore {
checkErr0(errors.New(fmt.Sprint("rcvmore ==", rcvmore)), 8)
return
}
// Receive message at server side
msg, err = server.Recv(0)
if checkErr0(err, 9) {
return
}
// Check that message is still the same
if msg != content {
checkErr0(errors.New(fmt.Sprintf("%q != %q", msg, content)), 10)
}
rcvmore, err = server.GetRcvmore()
if checkErr0(err, 11) {
return
}
if rcvmore {
checkErr0(errors.New(fmt.Sprint("rcvmore == ", rcvmore)), 12)
return
}
// The same, from server back to client
// Send message from server to client
rc, err = server.Send(content, zmq.SNDMORE)
if checkErr0(err, 13) {
return
}
if rc != 32 {
checkErr0(errors.New("rc != 32"), 14)
}
rc, err = server.Send(content, 0)
if checkErr0(err, 15) {
return
}
if rc != 32 {
checkErr0(errors.New("rc != 32"), 16)
}
// Receive message at client side
msg, err = client.Recv(0)
if checkErr0(err, 17) {
return
}
// Check that message is still the same
if msg != content {
checkErr0(errors.New(fmt.Sprintf("%q != %q", msg, content)), 18)
}
rcvmore, err = client.GetRcvmore()
if checkErr0(err, 19) {
return
}
if !rcvmore {
checkErr0(errors.New(fmt.Sprint("rcvmore ==", rcvmore)), 20)
return
}
// Receive message at client side
msg, err = client.Recv(0)
if checkErr0(err, 21) {
return
}
// Check that message is still the same
if msg != content {
checkErr0(errors.New(fmt.Sprintf("%q != %q", msg, content)), 22)
}
rcvmore, err = client.GetRcvmore()
if checkErr0(err, 23) {
return
}
if rcvmore {
checkErr0(errors.New(fmt.Sprint("rcvmore == ", rcvmore)), 24)
return
}
}
func TestDisconnectInproc(t *testing.T) {
var pubSocket, subSocket *zmq.Socket
defer func() {
for _, s := range []*zmq.Socket{pubSocket, subSocket} {
if s != nil {
s.SetLinger(0)
s.Close()
}
}
}()
publicationsReceived := 0
isSubscribed := false
pubSocket, err := zmq.NewSocket(zmq.XPUB)
if err != nil {
t.Fatal("NewSocket XPUB:", err)
}
subSocket, err = zmq.NewSocket(zmq.SUB)
if err != nil {
t.Fatal("NewSocket SUB:", err)
}
err = subSocket.SetSubscribe("foo")
if err != nil {
t.Fatal("subSocket.SetSubscribe:", err)
}
err = pubSocket.Bind("inproc://someInProcDescriptor")
if err != nil {
t.Fatal("pubSocket.Bind:", err)
}
iteration := 0
poller := zmq.NewPoller()
poller.Add(subSocket, zmq.POLLIN) // read publications
poller.Add(pubSocket, zmq.POLLIN) // read subscriptions
for {
sockets, err := poller.Poll(100 * time.Millisecond)
if err != nil {
t.Error("Poll:", err)
break // Interrupted
}
for _, socket := range sockets {
if socket.Socket == pubSocket {
for {
buffer, err := pubSocket.Recv(0)
if err != nil {
t.Fatal("pubSocket.Recv", err)
}
exp := "\x01foo"
if isSubscribed {
exp = "\x00foo"
}
if buffer != exp {
t.Errorf("pubSocket.Recv: expected %q, got %q", exp, buffer)
}
if buffer[0] == 0 {
if isSubscribed != true {
t.Errorf("Poller: expected subscribed")
}
isSubscribed = false
} else {
if isSubscribed != false {
t.Errorf("Poller: expected not subscribed")
}
isSubscribed = true
}
more, err := pubSocket.GetRcvmore()
if err != nil {
t.Fatal("pubSocket.GetRcvmore:", err)
}
if !more {
break // Last message part
}
}
break
}
}
for _, socket := range sockets {
if socket.Socket == subSocket {
for _, exp := range []string{"foo", "this is foo!", "", ""} {
msg, err := subSocket.Recv(0)
if err != nil {
t.Fatal("subSocket.Recv:", err)
}
if msg != exp {
t.Errorf("subSocket.Recv: expected %q, got %q", exp, msg)
}
more, err := subSocket.GetRcvmore()
if err != nil {
t.Fatal("subSocket.GetRcvmore:", err)
}
if !more {
publicationsReceived++
break // Last message part
}
}
break
}
}
if iteration == 1 {
err := subSocket.Connect("inproc://someInProcDescriptor")
if err != nil {
t.Fatal("subSocket.Connect", err)
}
}
if iteration == 4 {
err := subSocket.Disconnect("inproc://someInProcDescriptor")
if err != nil {
t.Fatal("subSocket.Disconnect", err)
}
}
if iteration > 4 && len(sockets) == 0 {
break
}
_, err = pubSocket.Send("foo", zmq.SNDMORE)
if err != nil {
t.Fatal("pubSocket.Send 1", err)
}
_, err = pubSocket.Send("this is foo!", 0)
if err != nil {
t.Fatal("pubSocket.Send 2", err)
}
iteration++
}
if publicationsReceived != 3 {
t.Error("publicationsReceived != 3 ")
}
if isSubscribed {
t.Error("isSubscribed")
}
err = pubSocket.Close()
pubSocket = nil
if err != nil {
t.Error("pubSocket.Close:", err)
}
err = subSocket.Close()
subSocket = nil
if err != nil {
t.Error("subSocket.Close:", err)
}
}
func Example_test_hwm() {
MAX_SENDS := 10000
BIND_FIRST := 1
CONNECT_FIRST := 2
test_defaults := func() int {
// Set up bind socket
bind_socket, err := zmq.NewSocket(zmq.PULL)
if checkErr(err) {
return 0
}
defer func() {
err := bind_socket.Close()
checkErr(err)
}()
err = bind_socket.Bind("inproc://a")
if checkErr(err) {
return 0
}
// Set up connect socket
connect_socket, err := zmq.NewSocket(zmq.PUSH)
if checkErr(err) {
return 0
}
defer func() {
err := connect_socket.Close()
checkErr(err)
}()
err = connect_socket.Connect("inproc://a")
if checkErr(err) {
return 0
}
// Send until we block
send_count := 0
for send_count < MAX_SENDS {
_, err := connect_socket.Send("", zmq.DONTWAIT)
if err != nil {
break
}
send_count++
}
// Now receive all sent messages
recv_count := 0
for {
_, err := bind_socket.Recv(zmq.DONTWAIT)
if err != nil {
break
}
recv_count++
}
fmt.Println("send_count == recv_count:", send_count == recv_count)
return send_count
}
count_msg := func(send_hwm, recv_hwm, testType int) int {
var bind_socket, connect_socket *zmq.Socket
var err error
if testType == BIND_FIRST {
// Set up bind socket
bind_socket, err = zmq.NewSocket(zmq.PULL)
if checkErr(err) {
return 0
}
defer func() {
err := bind_socket.Close()
checkErr(err)
}()
err = bind_socket.SetRcvhwm(recv_hwm)
if checkErr(err) {
return 0
}
err = bind_socket.Bind("inproc://a")
if checkErr(err) {
return 0
}
// Set up connect socket
connect_socket, err = zmq.NewSocket(zmq.PUSH)
if checkErr(err) {
return 0
}
defer func() {
err := connect_socket.Close()
checkErr(err)
}()
err = connect_socket.SetSndhwm(send_hwm)
if checkErr(err) {
return 0
}
err = connect_socket.Connect("inproc://a")
if checkErr(err) {
return 0
}
} else {
// Set up connect socket
connect_socket, err = zmq.NewSocket(zmq.PUSH)
if checkErr(err) {
return 0
}
defer func() {
err := connect_socket.Close()
checkErr(err)
}()
err = connect_socket.SetSndhwm(send_hwm)
if checkErr(err) {
return 0
}
err = connect_socket.Connect("inproc://a")
if checkErr(err) {
return 0
}
// Set up bind socket
bind_socket, err = zmq.NewSocket(zmq.PULL)
if checkErr(err) {
return 0
}
defer func() {
err := bind_socket.Close()
checkErr(err)
}()
err = bind_socket.SetRcvhwm(recv_hwm)
if checkErr(err) {
return 0
}
err = bind_socket.Bind("inproc://a")
if checkErr(err) {
return 0
}
}
// Send until we block
send_count := 0
for send_count < MAX_SENDS {
_, err := connect_socket.Send("", zmq.DONTWAIT)
if err != nil {
break
}
send_count++
}
// Now receive all sent messages
recv_count := 0
for {
_, err := bind_socket.Recv(zmq.DONTWAIT)
if err != nil {
break
}
recv_count++
}
fmt.Println("send_count == recv_count:", send_count == recv_count)
// Now it should be possible to send one more.
_, err = connect_socket.Send("", 0)
if checkErr(err) {
return 0
}
// Consume the remaining message.
_, err = bind_socket.Recv(0)
checkErr(err)
return send_count
}
test_inproc_bind_first := func(send_hwm, recv_hwm int) int {
return count_msg(send_hwm, recv_hwm, BIND_FIRST)
}
test_inproc_connect_first := func(send_hwm, recv_hwm int) int {
return count_msg(send_hwm, recv_hwm, CONNECT_FIRST)
}
test_inproc_connect_and_close_first := func(send_hwm, recv_hwm int) int {
// Set up connect socket
connect_socket, err := zmq.NewSocket(zmq.PUSH)
if checkErr(err) {
return 0
}
err = connect_socket.SetSndhwm(send_hwm)
if checkErr(err) {
connect_socket.Close()
return 0
}
err = connect_socket.Connect("inproc://a")
if checkErr(err) {
connect_socket.Close()
return 0
}
// Send until we block
send_count := 0
for send_count < MAX_SENDS {
_, err := connect_socket.Send("", zmq.DONTWAIT)
if err != nil {
break
}
send_count++
}
// Close connect
err = connect_socket.Close()
if checkErr(err) {
return 0
}
// Set up bind socket
bind_socket, err := zmq.NewSocket(zmq.PULL)
if checkErr(err) {
return 0
}
defer func() {
err := bind_socket.Close()
checkErr(err)
}()
err = bind_socket.SetRcvhwm(recv_hwm)
if checkErr(err) {
return 0
}
err = bind_socket.Bind("inproc://a")
if checkErr(err) {
return 0
}
// Now receive all sent messages
recv_count := 0
for {
_, err := bind_socket.Recv(zmq.DONTWAIT)
if err != nil {
break
}
recv_count++
}
fmt.Println("send_count == recv_count:", send_count == recv_count)
return send_count
}
// Default values are 1000 on send and 1000 one receive, so 2000 total
fmt.Println("Default values")
count := test_defaults()
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
// Infinite send and receive buffer
fmt.Println("\nInfinite send and receive")
count = test_inproc_bind_first(0, 0)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
count = test_inproc_connect_first(0, 0)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
// Infinite send buffer
fmt.Println("\nInfinite send buffer")
count = test_inproc_bind_first(1, 0)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
count = test_inproc_connect_first(1, 0)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
// Infinite receive buffer
fmt.Println("\nInfinite receive buffer")
count = test_inproc_bind_first(0, 1)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
count = test_inproc_connect_first(0, 1)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
// Send and recv buffers hwm 1, so total that can be queued is 2
fmt.Println("\nSend and recv buffers hwm 1")
count = test_inproc_bind_first(1, 1)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
count = test_inproc_connect_first(1, 1)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
// Send hwm of 1, send before bind so total that can be queued is 1
fmt.Println("\nSend hwm of 1, send before bind")
count = test_inproc_connect_and_close_first(1, 0)
fmt.Println("count:", count)
time.Sleep(100 * time.Millisecond)
fmt.Println("\nDone")
// Output:
// Default values
// send_count == recv_count: true
// count: 2000
//
// Infinite send and receive
// send_count == recv_count: true
// count: 10000
// send_count == recv_count: true
// count: 10000
//
// Infinite send buffer
// send_count == recv_count: true
// count: 10000
// send_count == recv_count: true
// count: 10000
//
// Infinite receive buffer
// send_count == recv_count: true
// count: 10000
// send_count == recv_count: true
// count: 10000
//
// Send and recv buffers hwm 1
// send_count == recv_count: true
// count: 2
// send_count == recv_count: true
// count: 2
//
// Send hwm of 1, send before bind
// send_count == recv_count: true
// count: 1
//
// Done
}
func TestHwm(t *testing.T) {
MAX_SENDS := 10000
BIND_FIRST := 1
CONNECT_FIRST := 2
test_defaults := func() (result int) {
result = -1
// Set up bind socket
bind_socket, err := zmq.NewSocket(zmq.PULL)
if err != nil {
t.Error("NewSocket:", err)
return
}
defer func() {
err := bind_socket.Close()
if err != nil {
t.Error("bind_socket.Close:", err)
}
}()
err = bind_socket.Bind("inproc://a")
if err != nil {
t.Error("bind_socket.Bind:", err)
return
}
// Set up connect socket
connect_socket, err := zmq.NewSocket(zmq.PUSH)
if err != nil {
t.Error("NewSocket:", err)
return
}
defer func() {
err := connect_socket.Close()
if err != nil {
t.Error("connect_socket.Close:", err)
}
}()
err = connect_socket.Connect("inproc://a")
if err != nil {
t.Error("connect_socket.Connect:", err)
return
}
// Send until we block
send_count := 0
for send_count < MAX_SENDS {
_, err := connect_socket.Send("", zmq.DONTWAIT)
if err != nil {
break
}
send_count++
}
// Now receive all sent messages
recv_count := 0
for {
_, err := bind_socket.Recv(zmq.DONTWAIT)
if err != nil {
break
}
recv_count++
}
if send_count != recv_count {
t.Error("test_defaults: send_count == recv_count")
}
return send_count
}
count_msg := func(send_hwm, recv_hwm, testType int) (result int) {
result = -1
var bind_socket, connect_socket *zmq.Socket
var err error
if testType == BIND_FIRST {
// Set up bind socket
bind_socket, err = zmq.NewSocket(zmq.PULL)
if err != nil {
t.Error("NewSocket:", err)
return
}
defer func() {
err := bind_socket.Close()
if err != nil {
t.Error("bind_socket.Close:", err)
}
}()
err = bind_socket.SetRcvhwm(recv_hwm)
if err != nil {
t.Error("bind_socket.SetRcvhwm:", err)
return
}
err = bind_socket.Bind("inproc://a")
if err != nil {
t.Error("bind_socket.Bind:", err)
return
}
// Set up connect socket
connect_socket, err = zmq.NewSocket(zmq.PUSH)
if err != nil {
t.Error("NewSocket:", err)
return
}
defer func() {
err := connect_socket.Close()
if err != nil {
t.Error(err)
}
}()
err = connect_socket.SetSndhwm(send_hwm)
if err != nil {
t.Error("connect_socket.SetSndhwm:", err)
return
}
err = connect_socket.Connect("inproc://a")
if err != nil {
t.Error("connect_socket.Connect:", err)
return
}
} else {
// Set up connect socket
connect_socket, err = zmq.NewSocket(zmq.PUSH)
if err != nil {
t.Error("NewSocket:", err)
return
}
defer func() {
err := connect_socket.Close()
if err != nil {
t.Error("connect_socket.Close:", err)
}
}()
err = connect_socket.SetSndhwm(send_hwm)
if err != nil {
t.Error("connect_socket.SetSndhwm:", err)
return
}
err = connect_socket.Connect("inproc://a")
if err != nil {
t.Error("connect_socket.Connect:", err)
return
}
// Set up bind socket
bind_socket, err = zmq.NewSocket(zmq.PULL)
if err != nil {
t.Error("NewSocket:", err)
return
}
defer func() {
err := bind_socket.Close()
if err != nil {
t.Error("bind_socket.Close:", err)
}
}()
err = bind_socket.SetRcvhwm(recv_hwm)
if err != nil {
t.Error("bind_socket.SetRcvhwm:", err)
return
}
err = bind_socket.Bind("inproc://a")
if err != nil {
t.Error("bind_socket.Bind:", err)
return
}
}
// Send until we block
send_count := 0
for send_count < MAX_SENDS {
_, err := connect_socket.Send("", zmq.DONTWAIT)
if err != nil {
break
}
send_count++
}
// Now receive all sent messages
recv_count := 0
for {
_, err := bind_socket.Recv(zmq.DONTWAIT)
if err != nil {
break
}
recv_count++
}
if send_count != recv_count {
t.Error("count_msg: send_count != recv_count")
}
// Now it should be possible to send one more.
_, err = connect_socket.Send("", 0)
if err != nil {
t.Error("connect_socket.Send:", err)
return
}
// Consume the remaining message.
_, err = bind_socket.Recv(0)
if err != nil {
t.Error("bind_socket.Recv:", err)
}
return send_count
}
test_inproc_bind_first := func(send_hwm, recv_hwm int) int {
return count_msg(send_hwm, recv_hwm, BIND_FIRST)
}
test_inproc_connect_first := func(send_hwm, recv_hwm int) int {
return count_msg(send_hwm, recv_hwm, CONNECT_FIRST)
}
test_inproc_connect_and_close_first := func(send_hwm, recv_hwm int) (result int) {
result = -1
// Set up connect socket
connect_socket, err := zmq.NewSocket(zmq.PUSH)
if err != nil {
t.Error("NewSocket:", err)
return
}
defer func() {
if connect_socket != nil {
connect_socket.Close()
}
}()
err = connect_socket.SetSndhwm(send_hwm)
if err != nil {
t.Error("connect_socket.SetSndhwm:", err)
return
}
err = connect_socket.Connect("inproc://a")
if err != nil {
t.Error("connect_socket.Connect:", err)
return
}
// Send until we block
send_count := 0
for send_count < MAX_SENDS {
_, err := connect_socket.Send("", zmq.DONTWAIT)
if err != nil {
break
}
send_count++
}
// Close connect
err = connect_socket.Close()
connect_socket = nil
if err != nil {
t.Error("connect_socket.Close:", err)
return
}
// Set up bind socket
bind_socket, err := zmq.NewSocket(zmq.PULL)
if err != nil {
t.Error("NewSocket:", err)
return
}
defer func() {
err := bind_socket.Close()
if err != nil {
t.Error("bind_socket.Close:", err)
}
}()
err = bind_socket.SetRcvhwm(recv_hwm)
if err != nil {
t.Error("bind_socket.SetRcvhwm:", err)
return
}
err = bind_socket.Bind("inproc://a")
if err != nil {
t.Error("bind_socket.Bind:", err)
return
}
// Now receive all sent messages
recv_count := 0
for {
_, err := bind_socket.Recv(zmq.DONTWAIT)
if err != nil {
break
}
recv_count++
}
if send_count != recv_count {
t.Error("test_inproc_connect_and_close_first: send_count != recv_count")
}
return send_count
}
// Default values are 1000 on send and 1000 one receive, so 2000 total
if count := test_defaults(); count != 2000 {
t.Errorf("test_defaults: expected 2000, got %d", count)
}
time.Sleep(100 * time.Millisecond)
// Infinite send and receive buffer
if count := test_inproc_bind_first(0, 0); count != MAX_SENDS {
t.Errorf("test_inproc_bind_first(0, 0): expected %d, got %d", MAX_SENDS, count)
}
time.Sleep(100 * time.Millisecond)
if count := test_inproc_connect_first(0, 0); count != MAX_SENDS {
t.Errorf("test_inproc_connect_first(0, 0): expected %d, got %d", MAX_SENDS, count)
}
time.Sleep(100 * time.Millisecond)
// Infinite send buffer
if count := test_inproc_bind_first(1, 0); count != MAX_SENDS {
t.Errorf("test_inproc_bind_first(1, 0): expected %d, got %d", MAX_SENDS, count)
}
time.Sleep(100 * time.Millisecond)
if count := test_inproc_connect_first(1, 0); count != MAX_SENDS {
t.Errorf("test_inproc_connect_first(1, 0): expected %d, got %d", MAX_SENDS, count)
}
time.Sleep(100 * time.Millisecond)
// Infinite receive buffer
if count := test_inproc_bind_first(0, 1); count != MAX_SENDS {
t.Errorf("test_inproc_bind_first(0, 1): expected %d, got %d", MAX_SENDS, count)
}
time.Sleep(100 * time.Millisecond)
if count := test_inproc_connect_first(0, 1); count != MAX_SENDS {
t.Errorf("test_inproc_connect_first(0, 1): expected %d, got %d", MAX_SENDS, count)
}
time.Sleep(100 * time.Millisecond)
// Send and recv buffers hwm 1, so total that can be queued is 2
if count := test_inproc_bind_first(1, 1); count != 2 {
t.Errorf("test_inproc_bind_first(1, 1): expected 2, got %d", count)
}
time.Sleep(100 * time.Millisecond)
if count := test_inproc_connect_first(1, 1); count != 2 {
t.Errorf("test_inproc_connect_first(1, 1): expected 2, got %d", count)
}
time.Sleep(100 * time.Millisecond)
// Send hwm of 1, send before bind so total that can be queued is 1
if count := test_inproc_connect_and_close_first(1, 0); count != 1 {
t.Errorf("test_inproc_connect_and_close_first(1, 0): expected 1, got %d", count)
}
time.Sleep(100 * time.Millisecond)
}
// args:
// - host: hostname
// - tcp_port: port number; host:port builds the tcp socket
// - iface: name of network interface to listen to
// - c_sock:
// - d_dl_sock:
// - d_ul_sock:
func ListenTCP(host, tcp_port, iface string,
c_sock, d_dl_sock, d_ul_sock *zmq.Socket) {
// WDC state
connected := 0
// control channel to stop listening to coordnode
cn_stopch := make(chan bool)
// control channel to stop listening udp mcast
mcast_stopch := make(chan bool)
// Listen for TCP incoming connections
t, err := net.Listen("tcp", host+":"+tcp_port)
if err != nil {
fmt.Println("Error listening:", err.Error())
os.Exit(1)
}
// Close the listener when the application closes
defer t.Close()
// Make a buffer to hold incoming data
buf := make([]byte, 1024)
for {
// Listen for an incoming TCP connection
fmt.Println("Listening on " + host + ":" + tcp_port)
// this blocks until someone attempts to connect
t_conn, err := t.Accept()
if err != nil {
fmt.Println("Error accepting:", err.Error())
continue
}
defer t_conn.Close()
for {
// Read the incoming data from accepted conn into the buffer
// this blocks until some data are actually received
dlen, err := t_conn.Read(buf)
if err != nil {
if err.Error() == "EOF" {
if connected == 1 {
// stop listening to CoordNode
cn_stopch <- true
// stop listening UDP mcast
mcast_stopch <- true
connected = 0
}
break
} else {
fmt.Println("Error reading:", err.Error())
continue
}
}
if len(buf) == 0 || (int(buf[0])+1) != dlen {
fmt.Println("Error: Inconsistent message length")
continue
}
fmt.Println("received TCP command",
hex.EncodeToString(buf[:dlen]))
switch buf[1] {
case 0x01: // WDC_CONNECTION_REQ
fmt.Println("received connection request:",
hex.EncodeToString(buf[:dlen]))
// TODO: check expected len of WDC_CONNECTION_REQ
if dlen < 10 { // <-- this is currently arbitrary
fmt.Println("Error: wrong WDC_CONNECTION_REQ len")
continue
}
if connected == 1 {
msg.WDC_ERROR[2] = byte(msg.BUSY_CONNECTED)
t_conn.Write(msg.WDC_ERROR)
continue
}
msg.WDC_GET_STATUS_RES[0] = byte(dlen)
copy(msg.WDC_GET_STATUS_RES[3:], buf[2:])
// orig msg is very long with trailing zeroes
// truncate to dlen
msg.WDC_GET_STATUS_RES = msg.WDC_GET_STATUS_RES[:dlen+1]
// send message to CoordNode and get a return
c_sock.Send(string(buf[:dlen]), 0)
cn_buf, _ := c_sock.Recv(0)
if int(cn_buf[0])+1 != len(cn_buf) ||
cn_buf[1] != 0x02 { // WDC_CONNECTION_RES
fmt.Println("Error on reading from CoordNode")
msg.WDC_ERROR[2] = byte(msg.SERIAL_PORT)
t_conn.Write(msg.WDC_ERROR)
continue
}
// get multicast info
var MCAST_PORT uint16
binary.Read(bytes.NewReader(buf[8:10]),
binary.LittleEndian, &MCAST_PORT)
MCAST_ADDR := buf[10 : dlen-1]
// create UDP socket to server
SERVER_SOCK := t_conn.RemoteAddr().String()
SERVER_IP := strings.Split(SERVER_SOCK, ":")[0]
var SERVER_UDP_PORT uint16
binary.Read(bytes.NewReader(buf[6:8]),
binary.LittleEndian, &SERVER_UDP_PORT)
// create UDP address from string
udpaddr, err := net.ResolveUDPAddr("udp",
SERVER_IP+":"+fmt.Sprintf("%d", SERVER_UDP_PORT))
if err != nil {
fmt.Println("Error resolving UDP:", err.Error())
continue
}
// dial UDP
u_conn, err := net.DialUDP("udp", nil, udpaddr)
if err != nil {
fmt.Println("Error server UDP:", err.Error())
msg.WDC_ERROR[2] = byte(msg.CONNECTING)
t_conn.Write(msg.WDC_ERROR)
continue
}
fmt.Printf("Server UDP is at: %s:%d\n",
SERVER_IP, SERVER_UDP_PORT)
// close UDP when the application closes
defer u_conn.Close()
// set and send connection response
copy(msg.WDC_CONNECTION_RES, cn_buf)
// reply to server
t_conn.Write(msg.WDC_CONNECTION_RES)
fmt.Println("sent connection response:",
hex.EncodeToString(msg.WDC_CONNECTION_RES))
// Serve UDP mcast in a new goroutine
go ListenUDPMcast(string(MCAST_ADDR),
fmt.Sprintf("%d", MCAST_PORT), iface, d_dl_sock,
mcast_stopch)
// Start listening to CoordNode
go ListenCoordNode(d_ul_sock, u_conn, cn_stopch)
connected = 1
case 0x03: // WDC_DISCONNECTION_REQ
fmt.Println("received disconnection request")
if connected == 1 {
// send disconnect to CoordNode (bye)
c_sock.Send(string(buf[:dlen]), 0)
req_ack, _ := c_sock.Recv(0)
msg.WDC_DISCONNECTION_REQ_ACK = []byte(req_ack)
// stop listening to CoordNode
cn_stopch <- true
// stop listening UDP mcast
mcast_stopch <- true
// TODO u_conn.Close() (u_conn undefined)
// send disconnect ack to server
t_conn.Write(msg.WDC_DISCONNECTION_REQ_ACK)
fmt.Println("sent disconnection request ack, bye!")
}
connected = 0
case 0x05: // WDC_GET_STATUS_REQ
fmt.Println("received WDC status request")
msg.WDC_GET_STATUS_RES[2] = byte(connected)
t_conn.Write(msg.WDC_GET_STATUS_RES)
fmt.Println("sent WDC status response:",
hex.EncodeToString(msg.WDC_GET_STATUS_RES))
case 0x07, 0x09:
// WDC_SET_COOR_LONG_ADDR_REQ ||
// WDC_RESET_REQ
if connected == 1 {
msg.WDC_ERROR[2] = byte(msg.BUSY_CONNECTED)
t_conn.Write(msg.WDC_ERROR)
} else {
fmt.Println("received long address set req")
c_sock.Send(string(buf[:dlen]), 0)
cn_buf, _ := c_sock.Recv(0)
if int(cn_buf[0])+1 != len(cn_buf) {
fmt.Println("Error reading from CoordNode")
continue
}
copy(msg.WDC_SET_COOR_LONG_ADDR_REQ_ACK, cn_buf)
t_conn.Write(msg.WDC_SET_COOR_LONG_ADDR_REQ_ACK)
fmt.Println("sent long address set ack")
if buf[1] == 0x09 {
fmt.Println("received reset request")
t_conn.Write(msg.WDC_RESET_REQ_ACK)
fmt.Println("sent reset ack, bye!")
// Exit will close UDP, TCP, UDP mcast
// TODO: serial; reboot instead of app exit
os.Exit(0)
}
}
case 0x0B:
// WDC_REPLACE_SECURITY_POLICY
fmt.Println("received replace security policy")
if connected == 0 {
msg.WDC_ERROR[2] = byte(msg.BUSY_CONNECTED) // TODO: not correct semantically
t_conn.Write(msg.WDC_ERROR)
continue
}
fmt.Println("replace security policy command:", hex.EncodeToString(buf[:dlen]))
msg.WDC_REPLACE_SECURITY_POLICY_ACK[2] = 0x00
t_conn.Write(msg.WDC_REPLACE_SECURITY_POLICY_ACK)
fmt.Println("sent replace security policy ack")
case 0x0D:
// WDC_REPLACE_SESSION_KEYS
fmt.Println("received replace session keys")
if connected == 0 {
msg.WDC_ERROR[2] = byte(msg.BUSY_CONNECTED) // TODO: not correct semantically
t_conn.Write(msg.WDC_ERROR)
continue
}
fmt.Println("replace session keys command:", hex.EncodeToString(buf[:dlen]))
msg.WDC_REPLACE_SESSIONKEYS_ACK[2] = 0x00
t_conn.Write(msg.WDC_REPLACE_SESSIONKEYS_ACK)
fmt.Println("sent replace session keys ack")
default:
fmt.Println("received unknown command")
msg.WDC_ERROR[2] = byte(msg.WRONG_CMD)
t_conn.Write(msg.WDC_ERROR)
}
}
// TODO cleanup on exiting loop
}
}
func TestRemoteEndpoint(t *testing.T) {
if _, minor, _ := zmq.Version(); minor < 1 {
t.Skip("RemoteEndpoint not avalable in ZeroMQ versions prior to 4.1.0")
}
addr := "tcp://127.0.0.1:9560"
peer := "127.0.0.1"
var rep, req *zmq.Socket
defer func() {
for _, s := range []*zmq.Socket{rep, req} {
if s != nil {
s.SetLinger(0)
s.Close()
}
}
}()
rep, err := zmq.NewSocket(zmq.REP)
if err != nil {
t.Fatal("NewSocket:", err)
}
req, err = zmq.NewSocket(zmq.REQ)
if err != nil {
t.Fatal("NewSocket:", err)
}
if err = rep.Bind(addr); err != nil {
t.Fatal("rep.Bind:", err)
}
if err = req.Connect(addr); err != nil {
t.Fatal("req.Connect:", err)
}
tmp := "test"
if _, err = req.Send(tmp, 0); err != nil {
t.Fatal("req.Send:", err)
}
// get message with peer address (remote endpoint)
msg, props, err := rep.RecvWithMetadata(0, "Peer-Address")
if err != nil {
t.Fatal("rep.RecvWithMetadata:", err)
return
}
if msg != tmp {
t.Errorf("rep.RecvWithMetadata: expected %q, got %q", tmp, msg)
}
if p := props["Peer-Address"]; p != peer {
t.Errorf("rep.RecvWithMetadata: expected Peer-Address == %q, got %q", peer, p)
}
err = rep.Close()
rep = nil
if err != nil {
t.Fatal("rep.Close:", err)
}
err = req.Close()
req = nil
if err != nil {
t.Fatal("req.Close:", err)
}
}
func bounce(server, client *zmq.Socket) {
content := "12345678ABCDEFGH12345678abcdefgh"
// Send message from client to server
rc, err := client.Send(content, zmq.SNDMORE|zmq.DONTWAIT)
if checkErr0(err) {
return
}
if rc != 32 {
checkErr0(errors.New("rc != 32"))
}
rc, err = client.Send(content, zmq.DONTWAIT)
if checkErr0(err) {
return
}
if rc != 32 {
checkErr0(errors.New("rc != 32"))
}
// Receive message at server side
msg, err := server.Recv(0)
if checkErr0(err) {
return
}
// Check that message is still the same
if msg != content {
checkErr0(errors.New(fmt.Sprintf("%q != %q", msg, content)))
}
rcvmore, err := server.GetRcvmore()
if checkErr0(err) {
return
}
if !rcvmore {
checkErr0(errors.New(fmt.Sprint("rcvmore ==", rcvmore)))
return
}
// Receive message at server side
msg, err = server.Recv(0)
if checkErr0(err) {
return
}
// Check that message is still the same
if msg != content {
checkErr0(errors.New(fmt.Sprintf("%q != %q", msg, content)))
}
rcvmore, err = server.GetRcvmore()
if checkErr0(err) {
return
}
if rcvmore {
checkErr0(errors.New(fmt.Sprint("rcvmore == ", rcvmore)))
return
}
// The same, from server back to client
// Send message from server to client
rc, err = server.Send(content, zmq.SNDMORE)
if checkErr0(err) {
return
}
if rc != 32 {
checkErr0(errors.New("rc != 32"))
}
rc, err = server.Send(content, 0)
if checkErr0(err) {
return
}
if rc != 32 {
checkErr0(errors.New("rc != 32"))
}
// Receive message at client side
msg, err = client.Recv(0)
if checkErr0(err) {
return
}
// Check that message is still the same
if msg != content {
checkErr0(errors.New(fmt.Sprintf("%q != %q", msg, content)))
}
rcvmore, err = client.GetRcvmore()
if checkErr0(err) {
return
}
if !rcvmore {
checkErr0(errors.New(fmt.Sprint("rcvmore ==", rcvmore)))
return
}
// Receive message at client side
msg, err = client.Recv(0)
if checkErr0(err) {
return
}
// Check that message is still the same
if msg != content {
checkErr0(errors.New(fmt.Sprintf("%q != %q", msg, content)))
}
rcvmore, err = client.GetRcvmore()
if checkErr0(err) {
return
}
if rcvmore {
checkErr0(errors.New(fmt.Sprint("rcvmore == ", rcvmore)))
return
}
}
