[asterisk-commits] dbrooks: branch 1.6.2 r185428 - in /branches/1.6.2: ./ channels/chan_gtalk.c

Tue Mar 31 12:51:51 CDT 2009

Author: dbrooks
Date: Tue Mar 31 12:51:48 2009
New Revision: 185428

URL: http://svn.digium.com/svn-view/asterisk?view=rev&rev=185428
Log:
Merged revisions 185363 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/trunk

................
  r185363 | dbrooks | 2009-03-31 11:46:57 -0500 (Tue, 31 Mar 2009) | 44 lines
  
  Merged revisions 185362 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r185362 | dbrooks | 2009-03-31 11:37:12 -0500 (Tue, 31 Mar 2009) | 35 lines
    
    Fix incorrect parsing in chan_gtalk when xmpp contains extra whitespaces
    
    To drill into the xmpp to find the capabilities between channels, chan_gtalk 
    calls iks_child() and iks_next(). iks_child() and iks_next() are functions in 
    the iksemel xml parsing library that traverse xml nodes. The bug here is that 
    both iks_child() and iks_next() will return the next iks_struct node 
    *regardless* of type. chan_gtalk expects the next node to be of type IKS_TAG, 
    which in most cases, it is, but in this case (a call being made from the 
    Empathy IM client), there exists iks_struct nodes which are not IKS_TAG data 
    (they are extraneous whitespaces), and chan_gtalk doesn't handle that case, 
    so capabilities don't match, and a call cannot be made.
    
    iks_first_tag() and iks_next_tag(), on the other hand, will not return the 
    very next iks_struct, but will check to see if the next iks_struct is of 
    type IKS_TAG. If it isn't, it will be skipped, and the next struct of type 
    IKS_TAG it finds will be returned. This assures that chan_gtalk will find 
    the iks_struct it is looking for.
    
    This fix simply changes all calls to iks_child() and iks_next() to become 
    calls to iks_first_tag() and iks_next_tag(), which resolves the capability 
    matching.
    
    The following is a payload listing from Empathy, which, due to the extraneous 
    whitespace, will not be parsed correctly by iksemel:
    
    <iq from='dbrooksjab at 235-22-24-10/Telepathy' to='astjab at 235-22-24-10/asterisk' type='set' id='542757715704'> <session xmlns='http://www.google.com/session' initiator='dbrooksjab at 235-22-24-10/Telepathy' type='initiate' id='1837267342'> <description xmlns='http://www.google.com/session/phone'> <payload-type clockrate='16000' name='speex' id='96'/>
     <payload-type clockrate='8000' name='PCMA' id='8'/>
     <payload-type clockrate='8000' name='PCMU' id='0'/>
     <payload-type clockrate='90000' name='MPA' id='97'/>
     <payload-type clockrate='16000' name='SIREN' id='98'/>
     <payload-type clockrate='8000' name='telephone-event' id='99'/>
    </description>
    </session>
    </iq>
  
  Review: http://reviewboard.digium.com/r/181/
  ........
................

Modified:
    branches/1.6.2/   (props changed)
    branches/1.6.2/channels/chan_gtalk.c

Propchange: branches/1.6.2/
------------------------------------------------------------------------------
Binary property 'trunk-merged' - no diff available.

Modified: branches/1.6.2/channels/chan_gtalk.c
URL: http://svn.digium.com/svn-view/asterisk/branches/1.6.2/channels/chan_gtalk.c?view=diff&rev=185428&r1=185427&r2=185428
==============================================================================

--- branches/1.6.2/channels/chan_gtalk.c (original)
+++ branches/1.6.2/channels/chan_gtalk.c Tue Mar 31 12:51:48 2009
@@ -615,11 +615,11 @@
 	}
 
 	/* codec points to the first <payload-type/> tag */
-	codec = iks_child(iks_child(iks_child(pak->x)));
+	codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
 	while (codec) {
 		ast_rtp_set_m_type(tmp->rtp, atoi(iks_find_attrib(codec, "id")));
 		ast_rtp_set_rtpmap_type(tmp->rtp, atoi(iks_find_attrib(codec, "id")), "audio", iks_find_attrib(codec, "name"), 0);
-		codec = iks_next(codec);
+		codec = iks_next_tag(codec);
 	}
 	
 	/* Now gather all of the codecs that we are asked for */
@@ -1204,12 +1204,12 @@
 	}
 
 	/* codec points to the first <payload-type/> tag */	
-	codec = iks_child(iks_child(iks_child(pak->x)));
+	codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
 	
 	while (codec) {
 		ast_rtp_set_m_type(p->rtp, atoi(iks_find_attrib(codec, "id")));
 		ast_rtp_set_rtpmap_type(p->rtp, atoi(iks_find_attrib(codec, "id")), "audio", iks_find_attrib(codec, "name"), 0);
-		codec = iks_next(codec);
+		codec = iks_next_tag(codec);
 	}
 	
 	/* Now gather all of the codecs that we are asked for */
@@ -1323,11 +1323,11 @@
 	traversenodes = pak->query;
 	while(traversenodes) {
 		if(!strcasecmp(iks_name(traversenodes), "session")) {
-			traversenodes = iks_child(traversenodes);
+			traversenodes = iks_first_tag(traversenodes);
 			continue;
 		}
 		if(!strcasecmp(iks_name(traversenodes), "transport")) {
-			traversenodes = iks_child(traversenodes);
+			traversenodes = iks_first_tag(traversenodes);
 			continue;
 		}
 		if(!strcasecmp(iks_name(traversenodes), "candidate")) {
@@ -1366,7 +1366,7 @@
 			gtalk_update_stun(p->parent, p);
 			newcandidate = NULL;
 		}
-		traversenodes = iks_next(traversenodes);
+		traversenodes = iks_next_tag(traversenodes);
 	}
 	
 	receipt = iks_new("iq");


