gprs: Support cancellation type
The cancellation type that is part of the UpdateCancellation message is currently ignored. This patch adds the missing glue between the existing GSUP and GMM support. If the type is not present or has the value updateProcedure the subcriber and MM context are siliently removed. Otherwise, a message with cause 'implicitly detached' is sent to the MS. Since the real cause is not known (the specification neither added a cause IE nor defined a static cause value), the MS may get the real cause in the following AttachRej. Added VTY commands: - update-subscriber imsi IMSI cancel update-procedure - update-subscriber imsi IMSI cancel subscription-withdraw the old form without the cause is no longer supported. Sponsored-by: On-Waves ehf
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@ -439,13 +439,24 @@ static int gprs_subscr_handle_loc_cancel_req(struct gsm_subscriber *subscr,
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struct gprs_gsup_message *gsup_msg)
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{
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struct gprs_gsup_message gsup_reply = {0};
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int is_update_procedure = !gsup_msg->cancel_type || gsup_msg->cancel_type;
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LOGGSUBSCRP(LOGL_INFO, subscr, "purging MS subscriber\n");
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LOGGSUBSCRP(LOGL_INFO, subscr, "Cancelling MS subscriber (%s)\n",
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is_update_procedure ?
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"update procedure" : "subscription withdraw");
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gsup_reply.message_type = GPRS_GSUP_MSGT_LOCATION_CANCEL_RESULT;
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gprs_subscr_tx_gsup_message(subscr, &gsup_reply);
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subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE;
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if (is_update_procedure)
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subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE;
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else
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/* Since a withdraw cause is not specified, just abort the
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* current attachment. The following re-attachment should then
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* be rejected with a proper cause value.
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*/
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subscr->sgsn_data->error_cause = GMM_CAUSE_IMPL_DETACHED;
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gprs_subscr_cancel(subscr);
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return 0;
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@ -545,11 +545,14 @@ failed:
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}
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DEFUN(update_subscr_cancel, update_subscr_cancel_cmd,
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UPDATE_SUBSCR_STR "cancel",
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UPDATE_SUBSCR_STR "cancel (update-procedure|subscription-withdraw)",
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UPDATE_SUBSCR_HELP
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"Cancel (remove) subscriber record\n")
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"Cancel (remove) subscriber record\n"
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"The MS moved to another SGSN\n"
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"The subscription is no longer valid\n")
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{
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const char *imsi = argv[0];
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const char *cancel_type = argv[1];
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struct gsm_subscriber *subscr;
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@ -560,6 +563,11 @@ DEFUN(update_subscr_cancel, update_subscr_cancel_cmd,
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return CMD_WARNING;
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}
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if (strcmp(cancel_type, "update-procedure") == 0)
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subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE;
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else
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subscr->sgsn_data->error_cause = GMM_CAUSE_IMPL_DETACHED;
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gprs_subscr_cancel(subscr);
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subscr_put(subscr);
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@ -606,6 +614,7 @@ DEFUN(update_subscr_destroy, update_subscr_destroy_cmd,
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}
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subscr->keep_in_ram = 0;
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subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE;
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gprs_subscr_cancel(subscr);
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if (subscr->use_count > 1)
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vty_out(vty, "%% subscriber is still in use%s",
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@ -768,7 +768,7 @@ class TestVTYSGSN(TestVTYGenericBSC):
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res = self.vty.command('show subscriber cache')
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self.assert_(res.find('1234567890') >= 0)
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self.assert_(res.find('Authorized: 1') >= 0)
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self.assertTrue(self.vty.verify('update-subscriber imsi 1234567890 cancel', ['']))
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self.assertTrue(self.vty.verify('update-subscriber imsi 1234567890 cancel update-procedure', ['']))
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res = self.vty.command('show subscriber cache')
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self.assert_(res.find('1234567890') >= 0)
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self.assertTrue(self.vty.verify('update-subscriber imsi 1234567890 destroy', ['']))
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