# How to comunicate the C++ Channel with nodejs? **URL:** \ **Category:** mediasoup libraries\ **Created:** [October 31, 2019, 5:22pm UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366 "2019-10-31T17:22:46Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![avdance](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/avdance/32/143_2.png) [@avdance](https://mediasoup.discourse.group/u/avdance)\ **Post date:** [October 31, 2019, 5:22pm UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366/1 "2019-10-31T17:22:46Z")
I know the nodejs start c++ worker by spawn and create a pipe , but the C++ Channel only create one fd. How to transport command from nodejs to C++ channel? I dont understant it . Can you help me ? ---
**Author:** ![ibc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/ibc/32/1540_2.png) [@ibc](https://mediasoup.discourse.group/u/ibc)\ **Post date:** [October 31, 2019, 5:37pm UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366/2 "2019-10-31T17:37:58Z")
It obviously works so, may I know why do you want to know it? Just in case, we do not help people that take code from mediasoup to build their own private / commercial forks. ---
**Author:** ![avdance](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/avdance/32/143_2.png) [@avdance](https://mediasoup.discourse.group/u/avdance)\ **Post date:** [October 31, 2019, 11:56pm UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366/3 "2019-10-31T23:56:14Z")
Ok, Thanks! I want to create a open source project with mediasoup. so I must understand why It can work well by this method. I also wish I can contribue my power for mediasoup in further . I think the mediasoup is very great . ---
**Author:** ![ibc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/ibc/32/1540_2.png) [@ibc](https://mediasoup.discourse.group/u/ibc)\ **Post date:** [November 1, 2019, 12:33am UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366/4 "2019-11-01T00:33:35Z")
The mediasoup Node library communicates with each worker process it creates by exchanging JSON messages in both directions via a UnixSocket (a UnixSocket with each worker process). Just that. ---
**Author:** ![avdance](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/avdance/32/143_2.png) [@avdance](https://mediasoup.discourse.group/u/avdance)\ **Post date:** [November 1, 2019, 1:33am UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366/5 "2019-11-01T01:33:57Z")
thanks a lot of. I am very sorry! I confused the dev branch with V3 branch yesterday. I view Worker.js in dev branch and view handle/UnixStreamSocket in V3 branch. ---
**Author:** ![ibc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/ibc/32/1540_2.png) [@ibc](https://mediasoup.discourse.group/u/ibc)\ **Post date:** [November 1, 2019, 10:10am UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366/6 "2019-11-01T10:10:03Z")
In “devel” branch there is support for Windows so instead of a UnixSocket something else is used, but that’s handled by libuv in a transparent way. However, due to a bug in Node+libuv (that will be fixed in next versions of Node) we had to use two unidirectional “pipes” instead of a single bidirectional “pipe” to make it work in Windows. ---
**Author:** ![avdance](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/avdance/32/143_2.png) [@avdance](https://mediasoup.discourse.group/u/avdance)\ **Post date:** [November 1, 2019, 12:59pm UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366/7 "2019-11-01T12:59:44Z")
I see, thank you! ---
**Author:** ![ibc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/ibc/32/1540_2.png) [@ibc](https://mediasoup.discourse.group/u/ibc)\ **Post date:** [December 2, 2019, 11:10pm UTC](https://mediasoup.discourse.group/t/how-to-comunicate-the-c-channel-with-nodejs/366/8 "2019-12-02T23:10:59Z")
Closed on December 2, 2019, 11:10pm UTC