libmsc/gsm_04_11_gsup.c: fix SM-RP-OA encoding for MO SMS over GSUP

We shall not include additional BCD length octet into the value part
of SM-RP-OA (Originating Address) IE. Instead, there should be
ToA/NPI header (1 octet).

Since we do not get ToN/NPI fields from the VLR/HLR, let's assume
the following default values:

  1... .... = Extension: No extension
  .001 .... = Type of number: International (1)
  .... 0001 = Numbering plan: ISDN/telephone (E.164/E.163) (1)

Change-Id: I0f32e2af0ed2d2fea6addf45efbdfee120c2425d
TTCN-3 test case: Ib467eeca6439bc6cce72293fbb5bb48f6d233db9
Related: OS#4324
changes/55/16655/2
Vadim Yanitskiy 3 years ago
parent 61f4780f29
commit 6e72282454
  1. 18
      src/libmsc/gsm_04_11_gsup.c

@ -1,5 +1,5 @@
/*
* (C) 2018 by Vadim Yanitskiy <axilirator@gmail.com>
* (C) 2018-2019 by Vadim Yanitskiy <axilirator@gmail.com>
*
* All Rights Reserved
*
@ -65,22 +65,28 @@ int gsm411_gsup_mo_fwd_sm_req(struct gsm_trans *trans, struct msgb *msg,
/* Assign SM-RP-MR to transaction state */
trans->sms.sm_rp_mr = sm_rp_mr;
/* Encode subscriber's MSISDN */
/* Encode subscriber's MSISDN as LHV (with room for ToN/NPI header) */
bcd_len = gsm48_encode_bcd_number(bcd_buf, sizeof(bcd_buf),
0, trans->vsub->msisdn);
1, trans->vsub->msisdn);
if (bcd_len <= 0 || bcd_len > sizeof(bcd_buf)) {
LOG_TRANS(trans, LOGL_ERROR, "Failed to encode subscriber's MSISDN\n");
return -EINVAL;
}
/* NOTE: assuming default ToN/NPI values as we don't have this info */
bcd_buf[1] = 0x01 /* NPI: ISDN/Telephony Numbering (ITU-T Rec. E.164 / ITU-T Rec. E.163) */
| (0x01 << 4) /* ToN: International Number */
| (0x01 << 7); /* No Extension */
/* Initialize a new GSUP message */
gsup_sm_msg_init(&gsup_msg, OSMO_GSUP_MSGT_MO_FORWARD_SM_REQUEST,
trans->vsub->imsi, &sm_rp_mr);
/* According to 12.2.3, the MSISDN from VLR is inserted here */
/* According to 12.2.3, the MSISDN from VLR is inserted here.
* NOTE: redundant BCD length octet is not included. */
gsup_msg.sm_rp_oa_type = OSMO_GSUP_SMS_SM_RP_ODA_MSISDN;
gsup_msg.sm_rp_oa_len = bcd_len;
gsup_msg.sm_rp_oa = bcd_buf;
gsup_msg.sm_rp_oa_len = bcd_len - 1;
gsup_msg.sm_rp_oa = bcd_buf + 1;
/* SM-RP-DA should (already) contain SMSC address */
gsup_msg.sm_rp_da_type = OSMO_GSUP_SMS_SM_RP_ODA_SMSC_ADDR;

Loading…
Cancel
Save