Get calling ip address from client connecting to a listening "tcp in" node

[David Fernandez]

I'd like to get the src/port address from a client connecting to a "tcp in" node.

The reason is to be able to diferentiate them , and respond acordingly based on config 

The only property I see is _session, but can't find info about it.

I bet that somewhere is the relation of session id <-> Tcp connection.

Someone knows where can I find this information?

Thanks.

[Dave C-J]

It should also give you ip and port  (below is using ipv6 but hey...

[David Fernandez]

Hi Dave, 

Thanks for the response, but I can't see that properties:

Maybe i'm running old version?

Node red version: 0.18.4

node -v : v10.0.0

Do you know where can I check beyond?

2018-05-14 17:16 GMT+02:00 Dave C-J <dce...@gmail.com>:

It should also give you ip and port  (below is using ipv6 but hey...

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[David Fernandez]

This is for UDP node, but not for TCP node

El dilluns, 14 maig de 2018 17:17:04 UTC+2, Dave C-J va escriure:

[Dave C-J]

well the UDP node does similar

[David Fernandez]

Sorry, maybe I did'nt explained very well.:

I'd like to get the src address and src port in a message from TCP IN node.

I see that in UDP but NOT in TCP. And don't know if it is normal or not.

Also I can't find references on that.

El dimecres, 23 maig de 2018 15:14:54 UTC+2, Dave C-J va escriure:

[Dave C-J]

The first example I showed WAS from a TCP node. You then said you wanted UDP, so the second was UDP. 

What version of NodeRED are you using ?

sent from phone

[steve rickus]

According to an earlier response, his versions are:

Node red version: 0.18.4

node -v : v10.0.0

So the node-red version is good, and the TCP In node should be returning the ip and port information...

However, his version of nodejs is perhaps too new?!? Could that be causing some of the node's info to be missing?

I wouldn't think so -- but perhaps if you dropped back to nodejs v4.11.2 LTS, you may have fewer issues.

--

Steve

[Nick O'Leary]

> but perhaps if you dropped back to nodejs v4.11.2 LTS, you may have fewer issues.

No! v4 is no longer supported by node.js   If you want LTS, then use Node 8

Nick

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[steve rickus]

Oops, my mistake! You are right, I meant v 8.11.2 LTS (which is what I installed earlier this week)...

[David Fernandez]

Hi Steve, Dave

Thanks for your patienceI've downgraded nodejs to v8.11.2, and reboot server. (ubuntu server 16.04.4 LTS)

Unfortunately, nothing changed. This is my msg debug. Only _session property but not ip and port. 

Someone could tell me what version of OS, node-red, nodejs is using, and can get tcp ip and port ?

If necessary, I can reinstall whole OS into a new vmware machine. I also have tested with raspbian.

El dimecres, 23 maig de 2018 22:13:31 UTC+2, steve rickus va escriure:

[Simon Walters]

Can you show us screenshot of how you've configured your TCP in node? (and/or an export of your flow)

Smon

[David Fernandez]

Sure!

I execute an: echo Text to send | ncat IP 5000

Screenshot:

Also I show the "info" from tcp in node: I don't see an explanation of ip and port like I see in the udp node.

Export:

[{"id":"74c115d5.49079c","type":"tcp in","z":"7990a864.279908","name":"","server":"server","host":"","port":"5000","datamode":"single","datatype":"buffer","newline":"","topic":"","base64":false,"x":240,"y":220,"wires":[["3e62ebbd.30fa44"]]},{"id":"3e62ebbd.30fa44","type":"debug","z":"7990a864.279908","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","x":460,"y":220,"wires":[]}]

So, I've tested: node-red versions 0.18.6 and 0.18.4 and nodejs v8.11.2 and 10.0.0 on ubuntu and raspbian. (and the docker version)


El dijous, 24 maig de 2018 12:48:35 UTC+2, Simon Walters va escriure:

[Dave C-J]

Wow - subtle... yes indeed. If set to single buffer the properties aren't there... If you set it to stream of buffers they are...

let me investigate...

[David Fernandez]

Hi, Dave, 

Now I see that if I wire directly a stream tcp node to debug node, I don't receive nothing in debug window!!. That's why I didn't notice ip an port!!

It must pass through a empty function, and voilà! 

El dijous, 24 maig de 2018 15:43:43 UTC+2, Dave C-J va escriure:

[Dave C-J]

so the subtlety is... that in "single" mode it uses the closing of the socket as the trigger to send - and "of course" as it has now just closed there is no socket.remoteAddress property to report anymore !

[Dave C-J]

Will look at getting a fix added.

[David Fernandez]

May I ask where the source code is, or some docs to "clone" node and experiment with source?.

Although I find node-red impressive (just few days of learning),  I find docs little scanty.

By now, I'll use it as stream mode, 

Thanks, Dave and others to respond.

El dijous, 24 maig de 2018 16:24:58 UTC+2, Dave C-J va escriure:

[Dave C-J]

Github link from main page.

https://nodered.org/