std net package does not supported in wasm/wasi

[Cylkal]

Problem description

code example:

package main

import (
	"net"
	"time"
)

func main() {
	_, _ = net.DialTimeout("tcp", ":80", time.Second)
}

compile command:
tinygo build -o demo.wasm -target=wasi ./test.go

out:

# command-line-arguments
test.go:9:13: DialTimeout not declared by package net

Background

When I want to import package golang.org/x/crypto/ssh, trying to connect to ssh server in a wasm module, some err occurs while compile:

# golang.org/x/crypto/ssh
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:71:54: TCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:104:39: TCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:183:51: TCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:289:13: TCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:389:54: TCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/client.go:173:19: DialTimeout not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/server.go:299:28: TCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/streamlocal.go:47:28: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/streamlocal.go:85:15: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/streamlocal.go:89:15: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/streamlocal.go:99:30: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/streamlocal.go:112:14: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:27:21: ResolveTCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:191:14: TCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:231:17: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:235:17: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:355:20: TCPAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:372:16: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:376:16: UnixAddr not declared by package net
../../../../go/pkg/mod/golang.org/x/crypto@v0.0.0-20210813211128-0a44fdfbc16e/ssh/tcpip.go:391:16: TCPAddr not declared by package net

As we can see, ssh import net package which does not support many methods or types it reqiuired.

Is there any plan to support the official net library?

[dankegel]

WASI does seem to have the beginnings of support for sockets, see
https://radu-matei.com/blog/towards-sockets-networking-wasi/
WebAssembly/WASI#312
bytecodealliance/wasmtime#70
https://github.com/WebAssembly/wasi-sockets
and there has been a tiny bit of discussion about it in tinygo slack,
https://gophers.slack.com/archives/CDJD3SUP6/p1645868342147429
but as yet nobody has wired it up.

[sago35]

I have not tried this, but the following may be helpful.

tinynet implements a subnet of the Go net package. Because it is based on unisockets, it supports more platforms (WASM/JS, WASM/WASI, TinyGo, Go etc.) than the official net package.

https://github.com/alphahorizonio/tinynet

[dipankardas011]

same issue here is my error log

# golang.org/x/crypto/ssh
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:289:13: undefined: net.TCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:71:54: undefined: net.TCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:104:39: undefined: net.TCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:183:51: undefined: net.TCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:389:54: undefined: net.TCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/client.go:177:19: undefined: net.DialTimeout
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/server.go:300:28: undefined: net.TCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/streamlocal.go:47:28: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/streamlocal.go:85:15: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/streamlocal.go:89:15: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/streamlocal.go:99:30: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/streamlocal.go:112:14: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:27:21: undefined: net.ResolveTCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:191:14: undefined: net.TCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:231:17: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:235:17: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:355:20: undefined: net.TCPAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:372:16: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:376:16: undefined: net.UnixAddr
../home/tinygo/go/pkg/mod/golang.org/x/crypto@v0.0.0-20220722155217-630584e8d5aa/ssh/tcpip.go:391:16: undefined: net.TCPAddr

[dipankardas011]

Is it worked on?
if not where should I work to help its development?

[aykevl]

See: #3704 (I haven't followed the development very closely).

[dipankardas011]

Also one more query does tinygo support cobra cli package? I know its not the right place but whom to ask😕

[aykevl]

@dipankardas011 you can test so for yourself, it only takes a few seconds 😉