[Freeswitch-users] What's differents with "session" and "channel"?

[Anthony Minessale]

Essentially the session is the high level entity that represents an outside connection and the channel is an 
object inside the session that is a collection of the higher level components of the call.
 
see http://www.freeswitch.org/docs/structswitch__core__session.html
 
At this point channel is just a struct inside session that shows you things you are allowed to safely play with.
 
Think of it like C++ as if channel is a class based on session as a base class.
 
The switch_channel.c api has no idea what a session is and the core_session api has no idea what a channel is they
only know they have an opaque pointer to each other to use api calls on when the time comes.
 
The session contains all the low level things like access to memory pools and the I/O routines where the channel
has things like channel variables and is the main entitiy that travels in the state machine and passes messages and dtmf around.
 
So the short answer is that it's purely asthetic for the sake of a clean API.
 
 

 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/

AIM: anthm
MSN:anthony_minessale at hotmail.com
JABBER:anthony.minessale at gmail.com

FreeSWITCH Developer Conference
sip:888 at 66.250.68.194
iax:guest at 66.250.68.194/888
googletalk:freeswitch at gmail.com
pstn:712-432-7800 



----- Original Message ----
From: will <will at camangi.com>
To: freeswitch-users at lists.freeswitch.org
Sent: Wednesday, August 30, 2006 3:35:07 AM
Subject: [Freeswitch-users] What's differents with "session" and "channel"?


I am confused “session” with “channel” in FreeSwitch.
A channel is a connection which brings in a call to the FreeSwitch. 
Once a call is established, it is named “session”. 
So multi session could exist in one channel, am I right? 
 
Will
_______________________________________________
Freeswitch-users mailing list
Freeswitch-users at lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20060831/e58a8b4b/attachment-0003.html