commit 5adb5c74050678eb57a4561e56864ee1a33b5cfb
author Pau Espin Pedrol <pespin@sysmocom.de> Thu Aug 17 17:57:58 2017 +0200
committer Pau Espin Pedrol <pespin@sysmocom.de> Thu Aug 17 17:58:02 2017 +0200
tree b1e32ade1ddd7a2e29741c70f92dd6a4d614ca6a
parent 69373b32014747b28cb972a0185e352516ce463a

esme: user_message_referece values should be smaller than 256

SMPP specs say message reference is 16 bits field.
However, message reference field in GSM03.40 spec is only 8 bits.

Change-Id: I52968a10089d14e0e3b0f9be678c261e3f92939c

src/osmo_gsm_tester/esme.py

diff --git a/src/osmo_gsm_tester/esme.py b/src/osmo_gsm_tester/esme.py
index c838841..9dbc5a3 100644
--- a/src/osmo_gsm_tester/esme.py
+++ b/src/osmo_gsm_tester/esme.py
@@ -145,7 +145,7 @@
         seqs = []
         self.log('Sending SMS "%s" to %s' % (str(sms_obj), sms_obj.dst_msisdn()))
         umref = self.next_user_message_reference
-        self.next_user_message_reference += 1
+        self.next_user_message_reference = (self.next_user_message_reference + 1) % (1 << 8)
         for part in parts:
             pdu = self.client.send_message(
                 source_addr_ton=smpplib.consts.SMPP_TON_INTL,