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4197 :: Can't connect to abstract unix socket

• Epictek (orginal) [2018-09-13T22:57:24+02:00] view original

  I have the following python code that I am trying to adapt to nim

  
  import socket
  import os
  client = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
  client.connect("\0termux-input")
  client.send("{'api_method':'Dialog','input_method':'text'}".encode('utf-8'))
  Run

  Here is my nim code

  import net
  let sock = newSocket(AF_UNIX, SOCK_STREAM, IPPROTO_IP)
  # also tried prefixing \0 to the path
  sock.connectUnix("termux-input")
  sock.send("{'api_method':'Dialog','input_method':'text'}")
  
  Run

  But I get a connection refused on connection.

  
  tapi.nim(5)              tapi
  net.nim(943)             connectUnix
  oserr.nim(110)           raiseOSError
  Error: unhandled exception: Connection refused [OSError]
  Run

  Does anyone have any pointers on how I can debug this?

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• dom96 (orginal) [2018-09-14T17:52:00+02:00] view original

  The easiest way to see what the problem is might be:

  • strace the python process running your script
  • strace the Nim program
  • Check the differences

  Then dive into the stdlib, specifically the spot where connectUnix is defined and fix it :)

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• Epictek (orginal) [2018-09-15T04:18:28+02:00] view original

  Thanks for the useful infomation.

  
  connect(3, {sa_family=AF_UNIX, sun_path=@"termux-input\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 110) = -1 ECONNREFUSED (Connection refused)
  Run

  Prefixing 0 adds the @ required for sun_path but is also appends several 0's to the end of the string (very strange).

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• Epictek (orginal) [2018-09-15T19:34:41+02:00] view original

  seems to work fine thanks :)

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