Double hostname in DLR URL

Andreas Fink <[email protected]> Sun, 27 Jul 2014 23:02:13 +0200
Newsgroups	gmane.comp.mobile.kannel.devel
Message-ID	<[email protected]>
Hi folks,

I run into a very puzzling issue with the delivery of DLRs from Kannel.

I have a script which submits SMS to kannel. This script constructs a DLR URL like this:

            callback_url = octstr_format("http://%s:%d/sms/response.php?priority=%d",
                                                 octstr_get_cstr(callback_host),
                                                 (int)callback_port,ilm_prio);
		further parameters added...

callback_host and callback_port are Octstr read from the config file and are always constant. They do not contain spaces or any trailing tabs or the like
Then this URL is urlencoded and passed on to the URL which is sent to kannel.
Kannel is processing the request and comes back with a delivery report.
The hostname passed is a straight IP address not a DNS name.


This is the SMSBox Log on a DLR being sent back

2014-07-27 20:27:06 [16079] [10] DEBUG:   Scheme: http://
2014-07-27 20:27:06 [16079] [10] DEBUG:   Host: 10.195.198.70
2014-07-27 20:27:06 [16079] [10] DEBUG:   Port: 80
2014-07-27 20:27:06 [16079] [10] DEBUG:   Username: (null)
2014-07-27 20:27:06 [16079] [10] DEBUG:   Password: (null)
2014-07-27 20:27:06 [16079] [10] DEBUG:   Path: /sms/response.php
2014-07-27 20:27:06 [16079] [10] DEBUG:   Query: {some parameters...}
2014-07-27 20:27:06 [16079] [10] DEBUG:   Fragment: (null)
2014-07-27 20:27:06 [16079] [10] DEBUG: HTTP: Reusing connection to `10.195.198.70:80' (fd=31).
2014-07-27 20:27:06 [16079] [10] DEBUG: Socket connected at once
2014-07-27 20:27:06 [16079] [10] DEBUG: HTTP: Sending request:
2014-07-27 20:27:06 [16079] [10] DEBUG: Octet string at 0x7f9dd3b00050:
2014-07-27 20:27:06 [16079] [10] DEBUG:   len:  563
2014-07-27 20:27:06 [16079] [10] DEBUG:   size: 1024
2014-07-27 20:27:06 [16079] [10] DEBUG:   immutable: 0


this is all correct so far and my script answers with a "OK" and everything's fine.


but then further down in the log I suddenly see this:


2014-07-27 20:32:30 [16079] [10] DEBUG: Parsing URL `http://10.195.198.70, 10.195.198.70/sms/response.php?....
2014-07-27 20:31:03 [16079] [10] DEBUG:   Scheme: http://
2014-07-27 20:31:03 [16079] [10] DEBUG:   Host: 85.195.198.70, 85.195.198.70
2014-07-27 20:31:03 [16079] [10] DEBUG:   Port: 80
2014-07-27 20:31:03 [16079] [10] DEBUG:   Username: (null)
2014-07-27 20:31:03 [16079] [10] DEBUG:   Password: (null)
2014-07-27 20:31:03 [16079] [10] DEBUG:   Path: /sms/response.php
2014-07-27 20:31:03 [16079] [10] DEBUG:   Query: ...
2014-07-27 20:31:03 [16079] [10] DEBUG:   Fragment: (null)
2014-07-27 20:31:03 [16079] [10] ERROR: gethostbyname failed

As you can see here, the IP address of the host is now twice in the hostname and of course this is not resolvable.
I verified and I am 100% sure that I pass it only once, not twice.
And nothing changed between the first request and the second one.
Its still the same running instance of my code calling kannel. Its still passing the same DLR URL being passed.
Its still the same smsbox running.

Has anyone seen such issues before?
Has there been any change in gwlib in regards to handling URL's?

The version used is a SVN checkout from 24th of June.
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