port-forward question

[username0101010101]

Hello,

This project is incredible, amazing work. It would be neat to have the ability to create port forwards to multiple different destinations other than 127.0.0.1. I wanted to ask both as a feature suggestion/request and also to figure out the best way to go about adding such a feature.

I added a "destination/-d" command line option to serpent in serve.go and changed the net.Dial in that file to support this and it worked as intended. However with this setup, the server side must specify a single destination IP ahead of time. Would it be technically possible to specify one or more destinations from the client side?

// Allow server to specify alternate port-forward destination address
serve.go
dst, err := net.Dial("tcp", fmt.Sprintf("%s:%d", destAddr, dst.Port()))

Thank you

[coadler]

Hey @username0101010101!

Unfortunately, there wouldn't be an easy way to specify this on the client side. The easiest way would probably be to have wush serve listen on a /96 IPv6 address, then encode the IPv4 to dial in the last 32 bits. This would, of course, only work for v4 addresses though.

Another potential solution on the wush serve side would be to provide a mapping of ports to IP addresses to dial, instead of only being able to specify one address.

[username0101010101]

Thank you for the reply, those are great ideas. I may give the IPv6 idea a try but like you mentioned it would be limited to IPv4 destination addresses. And there are of course many solutions like socat that could be used alongside wush to achieve this as well without adding complexity to wush. Super neat project! Thanks again