On Saturday 17 August 2019 at 14:20:36, Davor Spasoski wrote: > The smsc should send back DLR (deliver_sm pdu) on succesful delivery after > you turn on the phone. Try with a different handset and watch for the > deliver_sm pdu. Run bearerbox in debug level. > > Davor
It happens that I'm running bearerbox with debug logging already, so I checked the logs for the message I sent earlier. I see the following: 2019-08-17 12:19:53 [11506] [6] DEBUG: SMPP[Carrier] handle_pdu, got DLR 2019-08-17 12:19:53 [11506] [6] DEBUG: DLR[internal]: Looking for DLR smsc=Carrier, ts=4057323ed63f402595dde997f8f55d60, dst=447799112233, type=1 2019-08-17 12:19:53 [11506] [6] WARNING: DLR[internal]: DLR from SMSC<Carrier> for DST<447799112233> not found. 2019-08-17 12:19:53 [11506] [6] ERROR: SMPP[Carrier]: got DLR but could not find message or was not interested in it id<4057323ed63f402595dde997f8f55d60> dst<447799112233>, type<1> 2019-08-17 12:19:53 [11506] [6] DEBUG: SMPP[Carrier]: Sending PDU: 2019-08-17 12:19:53 [11506] [6] DEBUG: SMPP PDU 0x7fe9a0006910 dump: 2019-08-17 12:19:53 [11506] [6] DEBUG: type_name: deliver_sm_resp 2019-08-17 12:19:53 [11506] [6] DEBUG: command_id: 2147483653 = 0x80000005 2019-08-17 12:19:53 [11506] [6] DEBUG: command_status: 0 = 0x00000000 2019-08-17 12:19:53 [11506] [6] DEBUG: sequence_number: 16027465 = 0x00f48f49 2019-08-17 12:19:53 [11506] [6] DEBUG: message_id: NULL 2019-08-17 12:19:53 [11506] [6] DEBUG: SMPP PDU dump ends. So, it seems that kannel did receive a DLR with type=1, but then said "got DLR but could not find message or was not interested in it". I've found https://www.kannel.org/pipermail/users/2011-July/016176.html which addresses this, and it looks like suggestion 1 is my problem. I do have two machines running kannel, each with a connection to my upstream carrier (for load balancing / high availability), and I have no control over which connection that carrier will use to send me messages or DLRs. It looks like I'm going to have to look into using a database for my DLR storage. I do happen to have a MariaDB Galera cluster available, but I've read https://stackoverflow.com/questions/45486238/kannel-sqlbox that the Debian packaged installation of kannel doesn't work with MySQL, only if you build kannel from source. Does anyone know whether this is still true (kannel 1.4.4, kannel-sqlbox 0.7.2) for the Debian 9 Stretch packages? > >> On Aug 17, 2019, at 1:45 PM, Antony Stone wrote: > >> > >> Hi. > >> > >> I'm now wondering whether I've misunderstood how DLRs actually work. > >> > >> I just tried the following: > >> > >> 1. Make sure my mobile phone is turned on and has good signal. > >> > >> 2. Send a message via kannel to my mobile phone, with dlr_mask=31, > >> indicating that I want to get all status reports possible. > >> > >> 3. I immediately get back a DLR with status=8, which I interpret to mean > >> that the message has been received by the upstream SMSC and is being > >> processed. > >> > >> 4. I then immediately afterwards get a DLR with status=1, which I > >> interpret to mean that the message has been delivered to my phone. > >> > >> 5. Sure enough, the message has arrived on my phone. > >> > >> > >> 6. Turn the phone off. > >> > >> 7. Repeat step 2 above. > >> > >> 8. I immediately get back a DLR with status=8, just as in step 3 above. > >> > >> 9. Nothing further happens - no surprise there. > >> > >> 10. I turn my phone back on again and wait until it has signal. > >> > >> 11. The second message arrives on my phone. > >> > >> 12. The bit which surprises me is that I do *not* now get a DLR through > >> kannel with status=1, so my application has no way of knowing that the > >> message has now been delivered. > >> > >> > >> Am I misunderstanding the meaning of status codes 8 and 1, or maybe > >> misunderstanding how DLRs are supposed to work with SMS? > >> > >> I'd be grateful for any comments helping me to understand why I do not > >> get a DLR status=1 after the second message has arrived on my phone. > >> > >> > >> Thanks, > >> > >> Antony. -- "Life is just a lot better if you feel you're having 10 [small] wins a day rather than a [big] win every 10 years or so." - Chris Hadfield, former skiing (and ski racing) instructor Please reply to the list; please *don't* CC me.
