Re: smsbox UCS-2/mo-recode functional change between 1.4.4 and 1.5.0

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Re: smsbox UCS-2/mo-recode functional change between 1.4.4 and 1.5.0

Jim Page
Hi Kannel developers

I have encountered an issue where an automated test that works on 1.4.4 fails on 1.5.0. To cut a long story short (more detail below), I am testing that sending a UCS2 message sent to myself, with mo-recode set to true in my SMSbox config, comes back with the UTF-8 I am expecting to my web service.

The gateway invocation that I used previously was this:


The php code used to generate the string prior to url encoding:

        $smsbodyutf8 = '!TeSt! 你好朋友Michael';
        $smsbodyucs2 = iconv('UTF-8', 'UCS-2BE', $smsbodyutf8);

This test used to work on 1.4.4, but on build 5173 it fails, returning this text: '℀吀攀匀琀℀ 恏絙୧쭓䴀椀挀栀愀攀氀’ which is random chinese garbage. It now requires this to work correctly:


The code to generate the encoded UCS2 is now this (prior to url encoding):

        $smsbodyutf8 = '!TeSt! 你好朋友Michael';
        $smsbodyucs2 = iconv('UTF-8', 'UCS-2LE', $smsbodyutf8);

In both cases the log line 'INFO: MO message converted from UCS-2 to UTF-8’ appears without error.

What’s strange is that in gw/smsbox.c:1666 it looks as if its expecting to decode from UTF16-BE … so without digging too deeply into the code I am going to assume that it’s translated from UCS-2 elsewhere to UTF16-BE, and maybe whatever library has switched from assuming BE to LE … or something. Over to you ...

Environment is x86_64 debian jessie from the docker hub, running in a docker container on a MacBook pro. config attached.

All the best and keep up the good work lads and lasses!

RedMatter Ltd
Jim Page
VP Mobile Services
+44 (0)333 150 1666
+44 (0)7870 361412
[hidden email]

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