smsc_soap.c

The Kannel Open Source WAP and SMS gateway works as both an SMS gateway, for implementing keyword b

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 * Portions of this software are based upon software originally written at  
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/*
 * smsc_soap.c - Implementation of SOAP (XML over HTTP) as a Kannel module
 *
 * Oded Arbel,     m-Wise inc ([e-mail])
 * Dima Milentiev, m-Wise inc ([e-mail])
 *
 * ChangeLog:
 *
 * 20/02/2002: started - copied smsc_mam.c for starting
 * 25/02/2002: implemented MT sending
 * 09/05/2002: fixed problem crash when HTTP connection fails.
 *             send message back to bearerbox on HTTP failure instead of local queue
 * 19/05/2002: stripped leading + from international numbers
 * 20/05/2002: fixed previous change
 *             changed Transaction Id returned to support 64 bit integers
 * 27/05/2002: changed DLR creation to store the transaction ID instead of timestamp
 *              added parsing of human readable time in DLR
 * 28/05/2002: added multi thread sending support
 * 02/06/2002: changed validity computing to accept minutes instead of seconds
 * 04/06/2002: Changed callbacks to take into account that they might be called while the connection
 *              is dead.

 * 04/06/2002: Started to implement generic parsing engine.
 * 09/06/2002: Removed hardcoded XML generation and parsing
 * 22/07/2002: Removed wrong assignment of charset_convert return code to msg->sms.coding
 * 30/07/2002: fixed wrong format for year in soap_write_date
 *               additional debug and process for invalid charset conversion
 * 04/08/2002: forced chraset_conversion to/from UCS-2 to use big endianity
 *             added curly bracing support to XML data tokens
 * 04/09/2002: Added some debugging info
 * 05/09/2002: Changed dlr_add and http_start_request calls to support current CVS
 * 26/09/2002: Added soap_fetch_xml_data
 * 29/09/2002: Changed Ack/Nack to process case when Ack not return msg ID, move declaration to fix worning
 * 01/10/2002: started to change MO general
 * 07/10/2002: MT generalization
 * 
 * TODOs:
 *	- add a configuration option to the max number of messages a client can send, and use
 *	  and implement KeepAlive in the clients.
 *	- support XML generation through DTD
 *	- support XML parsing through DTD
 *
 *
 * Usage: add the following to kannel.conf:
 *
 *   group = smsc
 *   smsc = soap
 *   send-url = <URI>		- URI to send SOAP bubbles at (mandatory)
 *   receive-port = <number>	- port number to bind our server on (Default: disabled - MT only)
 *   xml-files = "MT.xml;MO.xml;DLR.xml" - XML templates for generation of MT messages 
 *                                         and MO and DLR responses
 *   xmlspec-files = "MT.spec;MO.spec;DLR.spec" - XML path spec files for parsing of MT