Merged revisions 185362 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  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@235-22-24-10/Telepathy' to='astjab@235-22-24-10/asterisk' type='set' id='542757715704'> <session xmlns='http://www.google.com/session' initiator='dbrooksjab@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/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@185363 65c4cc65-6c06-0410-ace0-fbb531ad65f3