Hi Everyone, I believe there is a bug in the Windows implementation of
asyncnet. I cannot specify a source IP or source port using bindAddr() for use
in a TCP client.
An extract of the problem code is below:
import asyncdispatch, asyncnet
import net
proc client() {.async.} =
let socket = newAsyncSocket(buffered=false)
socket.bindAddr(Port(8888),"192.168.1.100")
await socket.connect("example.com", Port(80))
waitFor client()
Run
Error:
Error: unhandled exception: An invalid argument was supplied.
Async traceback:
C:\tmp\problemtcpclient.nim(8) problemtcpclient
C:\nim-1.6.12\lib\pure\asyncmacro.nim(232) client
C:\nim-1.6.12\lib\pure\asyncmacro.nim(28) clientNimAsyncContinue
C:\tmp\problemtcpclient.nim(7) clientIter
C:\nim-1.6.12\lib\pure\asyncmacro.nim(232) connect
C:\nim-1.6.12\lib\pure\asyncmacro.nim(28) connectNimAsyncContinue
C:\nim-1.6.12\lib\pure\asyncnet.nim(299) connectIter
C:\nim-1.6.12\lib\pure\asyncdispatch.nim(1856) connect
C:\nim-1.6.12\lib\pure\asyncdispatch.nim(1684) bindToDomain
C:\nim-1.6.12\lib\pure\includes\oserr.nim(95) raiseOSError
#[
C:\tmp\problemtcpclient.nim(8) problemtcpclient
C:\nim-1.6.12\lib\pure\asyncmacro.nim(232) client
C:\nim-1.6.12\lib\pure\asyncmacro.nim(31) clientNimAsyncContinue
C:\nim-1.6.12\lib\pure\asyncmacro.nim(131) clientIter
C:\nim-1.6.12\lib\pure\asyncfutures.nim(389) read
]#
Exception message: An invalid argument was supplied.
[OSError]
Run
This issue does not occur in Linux and normal sockets (synchronous) have no
problem using bindAddr() to specify a source IP/port with connect().
Perhaps this could be raised as an issue? In the meanwhile, any advice for a
work around using nativesockets would be appreciated.
Thanks! H.G
