cbc-apitool: Make character set configurable

osmo-cbc already supported the transmission of UCS2 characters for quite
some time.  However, the cbc-apitool didn't expose this capability so
far.

Change-Id: Ia7291238f3b0af8ff9f476fce9a7805e12821d8c
Related: OS#6028

contrib/cbc-apitool.py

@@ -63,7 +63,7 @@ def do_create_cbs(args):
             },
             'payload': {
                 'payload_decoded': {
-                    'character_set': "gsm",
+                    'character_set': args.character_set,
                     #'language': 'en',
                     'data_utf8': args.payload_data_utf8,
                     #'data_utf8': "Mahlzeit1 Mahlzeit2 Mahlzeit3 Mahlzeit4 Mahlzeit5 Mahlzeit6 Mahlzeit7 Mahlzeit8"
@@ -126,6 +126,7 @@ def main(argv):
     parser_c_cbs.add_argument("--repetition-period", type=int, help='Repetition Period', default=5)
     parser_c_cbs.add_argument("--num-of-bcast", type=int, help='Number of Broadcasts', default=999)
     parser_c_cbs.add_argument("--payload-data-utf8", type=str, help='Payload Data in UTF8', required=True)
+    parser_c_cbs.add_argument("--character-set", type=str, help='Character Set', default="gsm", choices=["gsm","ucs2","8bit"])
     parser_c_cbs.set_defaults(func=do_create_cbs)
 
     parser_c_etws = subparsers.add_parser('create-etws', help='Create a new ETWS message')

doc/manuals/chapters/cbc-apitool.adoc

@@ -50,6 +50,8 @@ You can create a new CBS message using `cbc-apitool create-cbs`.
 *--payload-data-utf8 PAYLOAD_DATA_UTF8*::
         Payload data (typically text message) in UTF8 encoding.  Will be
         transcoded to 7bit GSM alphabet internally.
+*--character-set {gsm,8bit,ucs2}*::
+        Character set to be used for the message.  Default: gsm
 
 
 ==== `create-etws` Options