Accessing connection details within callback function, using conn id

[Jason Beyers]

Hi,

I'm trying to find the best and most reliable way to get connection info - specifically remote host/ip and port - within any of the callbacks (ex. on receive, on send, on connect, on disconnect) for a link object.

Ex. say I have some function that I'm using for the on-connect callback:

def my_connect_callback(conn, ident):

  print 'Client %s connected' % ident

  # not much else I can do

If I want to know who is connecting from within this function, using the two arguments made available to me (conn and ident) and some link object mylinkobject, can I do this?

(host, port) = mylinkobject.get_socket_by_conn(conn).sock.getpeername()

So my callback function could be improved by changing it to:

def my_connect_callback(conn, ident):

  (host, port) = mylinkobject.get_socket_by_conn(conn).sock.getpeername()

  print 'Client %s connected from %s:%d' % (ident, host, port)

I dont think get_socket_by_conn is documented but I found it in link.py.  Is this an alright way to grab this remote host/port info from the provided 'conn' argument?  Or should I be doing this lookup differently?  It's been working fine in my testing but I may be missing something big here.

Thanks!

-Jason

[Jason Beyers]

Ah, I did find a mention of get_socket_by_conn in the docs for getting peer cert info, I must have missed that.  So I'm assuming this approach is acceptable.

[David Široký]

Hi!

get_socket_by_conn(conn) returns an instance of LinkSocket class and it has the sock attribute which is an instance of Python's socket or SSLSocket. You can safely use it.

David