Harald Welte has submitted this change and it was merged. ( 
https://gerrit.osmocom.org/11069 )

Change subject: GSUP/SMS: introduce MO-/MT-FORWARD-SM messages
......................................................................

GSUP/SMS: introduce MO-/MT-FORWARD-SM messages

According to 3GPP TS 29.002, there are two services:

  - MAP-MO-FORWARD-SHORT-MESSAGE (see 12.2),
  - MAP-MT-FORWARD-SHORT-MESSAGE (see 12.9),

which are used to forward MO/MT short messages.

This change replicates both services as GSUP messages:

  - OSMO_GSUP_MSGT_MO_FORWARD_SM_*,
  - OSMO_GSUP_MSGT_MT_FORWARD_SM_*.

Please note, that only the 'must-have' IEs are introduced
by this change, in particular the following:

  - OSMO_GSUP_SM_RP_MR_IE (see note below),
  - OSMO_GSUP_SM_RP_DA_IE (see 7.6.8.1),
  - OSMO_GSUP_SM_RP_OA_IE (see 7.6.8.2),
  - OSMO_GSUP_SM_RP_UI_IE (see 7.6.8.4),
  - OSMO_GSUP_SM_RP_MMS_IE (see 7.6.8.7),
  - OSMO_GSUP_SM_RP_CAUSE_IE (see GSM TS 04.11, 8.2.5.4),

where both SM_RP_DA and SM_RP_OA IEs basically contain
a single nested TV of the following format:

  - T: identity type (see 'osmo_gsup_sms_sm_rp_oda_t'),
  - V: encoded identity itself (optional).

According to GSM TS 04.11, every single message on the SM-RL has
an unique message reference (see 8.2.3), that is used to link
an RP-ACK or RP-ERROR message to the associated (preceding)
RP-DATA or RP-SMMA message transfer attempt.

In case of TCAP/MAP, this message reference is being mapped to the
Invoke ID. But since GSUP has no 'Invoke ID' IE, and it is not
required for other applications (other than SMS), this change
introduces a special 'SM_RP_MR' IE that doesn't exist in MAP.

Change-Id: Ibe325c64ae2d6c626b232533bb4cbc65fc2b5d71
Related Change-Id: (docs) Ie0150756c33c1352bc4eb49421824542c711175c
Related Change-Id: (TTCN) Ibf49474a81235096c032ea21f217170f523bd94e
Related: OS#3587
---
M TODO-RELEASE
M include/Makefile.am
M include/osmocom/gsm/gsup.h
A include/osmocom/gsm/gsup_sms.h
M src/gsm/Makefile.am
M src/gsm/gsup.c
A src/gsm/gsup_sms.c
M src/gsm/libosmogsm.map
M tests/gsup/gsup_test.c
M tests/gsup/gsup_test.err
M tests/gsup/gsup_test.ok
11 files changed, 527 insertions(+), 15 deletions(-)

Approvals:
  Jenkins Builder: Verified
  Stefan Sperling: Looks good to me, but someone else must approve
  Harald Welte: Looks good to me, approved



diff --git a/TODO-RELEASE b/TODO-RELEASE
index 00720f6..16d96ec 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -16,3 +16,6 @@
 libosmogsm     gsm0808_cause_ext()     check for cause extended bit
 libosmogsm     gsm0808_cause_name()    use enum as parameter
 libosmogsm     gsm0808_create_cipher_reject()          use enum as parameter
+libosmogsm     osmo_gsup_message                       extended with SMS 
related fields
+libosmogsm     osmo_gsup_sms_{en|de}code_sm_rp_da      GSUP SM-RP-DA coding 
helpers
+libosmogsm     osmo_gsup_sms_{en|de}code_sm_rp_oa      GSUP SM-RP-OA coding 
helpers
diff --git a/include/Makefile.am b/include/Makefile.am
index ccf9e10..86d8d15 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -94,6 +94,7 @@
                        osmocom/gsm/gsm48_ie.h \
                        osmocom/gsm/gsm_utils.h \
                        osmocom/gsm/gsup.h \
+                       osmocom/gsm/gsup_sms.h \
                        osmocom/gsm/ipa.h \
                        osmocom/gsm/lapd_core.h \
                        osmocom/gsm/lapdm.h \
diff --git a/include/osmocom/gsm/gsup.h b/include/osmocom/gsm/gsup.h
index cd6fd31..192b877 100644
--- a/include/osmocom/gsm/gsup.h
+++ b/include/osmocom/gsm/gsup.h
@@ -40,6 +40,7 @@

 #include <stdint.h>
 #include <osmocom/core/msgb.h>
+#include <osmocom/gsm/gsup_sms.h>
 #include <osmocom/gsm/protocol/gsm_23_003.h>
 #include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
 #include <osmocom/crypt/auth.h>
@@ -88,6 +89,14 @@

        /*! Supplementary Services payload */
        OSMO_GSUP_SS_INFO_IE                    = 0x35,
+
+       /* SM related IEs (see 3GPP TS 29.002, section 7.6.8) */
+       OSMO_GSUP_SM_RP_MR_IE                   = 0x40,
+       OSMO_GSUP_SM_RP_DA_IE                   = 0x41,
+       OSMO_GSUP_SM_RP_OA_IE                   = 0x42,
+       OSMO_GSUP_SM_RP_UI_IE                   = 0x43,
+       OSMO_GSUP_SM_RP_CAUSE_IE                = 0x44,
+       OSMO_GSUP_SM_RP_MMS_IE                  = 0x45,
 };

 /*! GSUP message type */
@@ -121,6 +130,14 @@
        OSMO_GSUP_MSGT_PROC_SS_REQUEST          = 0b00100000,
        OSMO_GSUP_MSGT_PROC_SS_ERROR            = 0b00100001,
        OSMO_GSUP_MSGT_PROC_SS_RESULT           = 0b00100010,
+
+       OSMO_GSUP_MSGT_MO_FORWARD_SM_REQUEST    = 0b00100100,
+       OSMO_GSUP_MSGT_MO_FORWARD_SM_ERROR      = 0b00100101,
+       OSMO_GSUP_MSGT_MO_FORWARD_SM_RESULT     = 0b00100110,
+
+       OSMO_GSUP_MSGT_MT_FORWARD_SM_REQUEST    = 0b00101000,
+       OSMO_GSUP_MSGT_MT_FORWARD_SM_ERROR      = 0b00101001,
+       OSMO_GSUP_MSGT_MT_FORWARD_SM_RESULT     = 0b00101010,
 };

 #define OSMO_GSUP_IS_MSGT_REQUEST(msgt) (((msgt) & 0b00000011) == 0b00)
@@ -213,6 +230,26 @@
        /*! ASN.1 encoded MAP payload for Supplementary Services */
        uint8_t                         *ss_info;
        size_t                          ss_info_len;
+
+       /*! SM-RP-MR (see 3GPP TS 29.002, 7.6.1.1), Message Reference.
+        * Please note that there is no SM-RP-MR in TCAP/MAP! SM-RP-MR
+        * is usually mapped to TCAP's InvokeID, but we don't need it. */
+       const uint8_t                   *sm_rp_mr;
+       /*! SM-RP-DA (see 3GPP TS 29.002, 7.6.8.1), Destination Address */
+       enum osmo_gsup_sms_sm_rp_oda_t  sm_rp_da_type;
+       size_t                          sm_rp_da_len;
+       const uint8_t                   *sm_rp_da;
+       /*! SM-RP-OA (see 3GPP TS 29.002, 7.6.8.2), Originating Address */
+       enum osmo_gsup_sms_sm_rp_oda_t  sm_rp_oa_type;
+       size_t                          sm_rp_oa_len;
+       const uint8_t                   *sm_rp_oa;
+       /*! SM-RP-UI (see 3GPP TS 29.002, 7.6.8.4), SMS TPDU */
+       const uint8_t                   *sm_rp_ui;
+       size_t                          sm_rp_ui_len;
+       /*! SM-RP-Cause value (1 oct.) as per GSM TS 04.11, section 8.2.5.4 */
+       const uint8_t                   *sm_rp_cause;
+       /*! SM-RP-MMS (More Messages to Send), section 7.6.8.7 */
+       const uint8_t                   *sm_rp_mms;
 };

 int osmo_gsup_decode(const uint8_t *data, size_t data_len,
diff --git a/include/osmocom/gsm/gsup_sms.h b/include/osmocom/gsm/gsup_sms.h
new file mode 100644
index 0000000..521412d
--- /dev/null
+++ b/include/osmocom/gsm/gsup_sms.h
@@ -0,0 +1,38 @@
+#pragma once
+
+/*! \addtogroup gsup
+ *  @{
+ *
+ *  This header defines SMS (Short Message Service) extensions for
+ *  Osmocom GSUP (Generic Subscriber Update Protocol). The scope of
+ *  this module is defined by 3GPP TS 29.002, section 12.
+ *
+ *  \file gsup_sms.h
+ *  SMS (Short Message Service) extensions for Osmocom GSUP. */
+
+#include <stdint.h>
+
+/*! Possible identity types for SM-RP-{OA|DA} */
+enum osmo_gsup_sms_sm_rp_oda_t {
+       OSMO_GSUP_SMS_SM_RP_ODA_NONE            = 0x00,
+       OSMO_GSUP_SMS_SM_RP_ODA_IMSI            = 0x01,
+       OSMO_GSUP_SMS_SM_RP_ODA_MSISDN          = 0x02,
+       OSMO_GSUP_SMS_SM_RP_ODA_SMSC_ADDR       = 0x03,
+       /*! Special value for noSM-RP-DA and noSM-RP-OA */
+       OSMO_GSUP_SMS_SM_RP_ODA_NULL            = 0xff,
+};
+
+struct osmo_gsup_message;
+struct msgb;
+
+int osmo_gsup_sms_encode_sm_rp_da(struct msgb *msg,
+       const struct osmo_gsup_message *gsup_msg);
+int osmo_gsup_sms_decode_sm_rp_da(struct osmo_gsup_message *gsup_msg,
+       uint8_t *data, size_t data_len);
+
+int osmo_gsup_sms_encode_sm_rp_oa(struct msgb *msg,
+       const struct osmo_gsup_message *gsup_msg);
+int osmo_gsup_sms_decode_sm_rp_oa(struct osmo_gsup_message *gsup_msg,
+       uint8_t *data, size_t data_len);
+
+/*! @} */
diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am
index ccb38ad..3d2c560 100644
--- a/src/gsm/Makefile.am
+++ b/src/gsm/Makefile.am
@@ -29,7 +29,7 @@
                        auth_milenage.c milenage/aes-encblock.c gea.c \
                        milenage/aes-internal.c milenage/aes-internal-enc.c \
                        milenage/milenage.c gan.c ipa.c gsm0341.c apn.c \
-                       gsup.c gprs_gea.c gsm0503_conv.c oap.c gsm0808_utils.c \
+                       gsup.c gsup_sms.c gprs_gea.c gsm0503_conv.c oap.c 
gsm0808_utils.c \
                        gsm23003.c mncc.c bts_features.c oap_client.c \
                        gsm29118.c
 libgsmint_la_LDFLAGS = -no-undefined
diff --git a/src/gsm/gsup.c b/src/gsm/gsup.c
index 18b3580..e433997 100644
--- a/src/gsm/gsup.c
+++ b/src/gsm/gsup.c
@@ -67,6 +67,14 @@
        OSMO_VALUE_STRING(OSMO_GSUP_MSGT_PROC_SS_ERROR),
        OSMO_VALUE_STRING(OSMO_GSUP_MSGT_PROC_SS_RESULT),

+       OSMO_VALUE_STRING(OSMO_GSUP_MSGT_MO_FORWARD_SM_REQUEST),
+       OSMO_VALUE_STRING(OSMO_GSUP_MSGT_MO_FORWARD_SM_ERROR),
+       OSMO_VALUE_STRING(OSMO_GSUP_MSGT_MO_FORWARD_SM_RESULT),
+
+       OSMO_VALUE_STRING(OSMO_GSUP_MSGT_MT_FORWARD_SM_REQUEST),
+       OSMO_VALUE_STRING(OSMO_GSUP_MSGT_MT_FORWARD_SM_ERROR),
+       OSMO_VALUE_STRING(OSMO_GSUP_MSGT_MT_FORWARD_SM_RESULT),
+
        { 0, NULL }
 };

@@ -434,6 +442,35 @@
                        gsup_msg->ss_info_len = value_len;
                        break;

+               case OSMO_GSUP_SM_RP_MR_IE:
+                       gsup_msg->sm_rp_mr = value;
+                       break;
+
+               case OSMO_GSUP_SM_RP_DA_IE:
+                       rc = osmo_gsup_sms_decode_sm_rp_da(gsup_msg, value, 
value_len);
+                       if (rc)
+                               return rc;
+                       break;
+
+               case OSMO_GSUP_SM_RP_OA_IE:
+                       rc = osmo_gsup_sms_decode_sm_rp_oa(gsup_msg, value, 
value_len);
+                       if (rc)
+                               return rc;
+                       break;
+
+               case OSMO_GSUP_SM_RP_UI_IE:
+                       gsup_msg->sm_rp_ui = value;
+                       gsup_msg->sm_rp_ui_len = value_len;
+                       break;
+
+               case OSMO_GSUP_SM_RP_MMS_IE:
+                       gsup_msg->sm_rp_mms = value;
+                       break;
+
+               case OSMO_GSUP_SM_RP_CAUSE_IE:
+                       gsup_msg->sm_rp_cause = value;
+                       break;
+
                default:
                        LOGP(DLGSUP, LOGL_NOTICE,
                             "GSUP IE type %d unknown\n", iei);
@@ -529,7 +566,7 @@
 int osmo_gsup_encode(struct msgb *msg, const struct osmo_gsup_message 
*gsup_msg)
 {
        uint8_t u8;
-       int idx;
+       int idx, rc;
        uint8_t bcd_buf[GSM48_MI_SIZE] = {0};
        size_t bcd_len;

@@ -626,6 +663,42 @@
                                gsup_msg->ss_info_len, gsup_msg->ss_info);
        }

+       if (gsup_msg->sm_rp_mr) {
+               msgb_tlv_put(msg, OSMO_GSUP_SM_RP_MR_IE,
+                               sizeof(*gsup_msg->sm_rp_mr), 
gsup_msg->sm_rp_mr);
+       }
+
+       if (gsup_msg->sm_rp_da_type) {
+               rc = osmo_gsup_sms_encode_sm_rp_da(msg, gsup_msg);
+               if (rc) {
+                       LOGP(DLGSUP, LOGL_ERROR, "Failed to encode SM-RP-DA 
IE\n");
+                       return -EINVAL;
+               }
+       }
+
+       if (gsup_msg->sm_rp_oa_type) {
+               rc = osmo_gsup_sms_encode_sm_rp_oa(msg, gsup_msg);
+               if (rc) {
+                       LOGP(DLGSUP, LOGL_ERROR, "Failed to encode SM-RP-OA 
IE\n");
+                       return -EINVAL;
+               }
+       }
+
+       if (gsup_msg->sm_rp_ui) {
+               msgb_tlv_put(msg, OSMO_GSUP_SM_RP_UI_IE,
+                               gsup_msg->sm_rp_ui_len, gsup_msg->sm_rp_ui);
+       }
+
+       if (gsup_msg->sm_rp_mms) {
+               msgb_tlv_put(msg, OSMO_GSUP_SM_RP_MMS_IE,
+                               sizeof(*gsup_msg->sm_rp_mms), 
gsup_msg->sm_rp_mms);
+       }
+
+       if (gsup_msg->sm_rp_cause) {
+               msgb_tlv_put(msg, OSMO_GSUP_SM_RP_CAUSE_IE,
+                               sizeof(*gsup_msg->sm_rp_cause), 
gsup_msg->sm_rp_cause);
+       }
+
        return 0;
 }

diff --git a/src/gsm/gsup_sms.c b/src/gsm/gsup_sms.c
new file mode 100644
index 0000000..d49cf20
--- /dev/null
+++ b/src/gsm/gsup_sms.c
@@ -0,0 +1,256 @@
+/*
+ * (C) 2018 by Vadim Yanitskiy <axilira...@gmail.com>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+
+#include <osmocom/core/logging.h>
+#include <osmocom/core/msgb.h>
+
+#include <osmocom/gsm/gsup.h>
+#include <osmocom/gsm/tlv.h>
+
+/*! \addtogroup gsup
+ *  @{
+ *  \file gsup_sms.c
+ *  SMS (Short Message Service) extensions for Osmocom GSUP.
+ */
+
+/*! Encode SM-RP-DA IE (see 7.6.8.1), Destination Address.
+ * \param[out] msg      target message buffer (caller-allocated)
+ * \param[in]  gsup_msg abstract GSUP message structure
+ * \returns 0 in case of success, negative in case of error
+ */
+int osmo_gsup_sms_encode_sm_rp_da(struct msgb *msg,
+       const struct osmo_gsup_message *gsup_msg)
+{
+       uint8_t *id_enc;
+
+       switch (gsup_msg->sm_rp_da_type) {
+       case OSMO_GSUP_SMS_SM_RP_ODA_IMSI:
+       case OSMO_GSUP_SMS_SM_RP_ODA_MSISDN:
+       case OSMO_GSUP_SMS_SM_RP_ODA_SMSC_ADDR:
+               /* Prevent NULL-pointer (or empty) dereference */
+               if (gsup_msg->sm_rp_da == NULL || gsup_msg->sm_rp_da_len == 0) {
+                       LOGP(DLGSUP, LOGL_ERROR, "Empty?!? SM-RP-DA ID "
+                               "(type=0x%02x)!\n", gsup_msg->sm_rp_da_type);
+                       return -EINVAL;
+               }
+               break;
+
+       /* Special case for noSM-RP-DA */
+       case OSMO_GSUP_SMS_SM_RP_ODA_NULL:
+               break;
+
+       case OSMO_GSUP_SMS_SM_RP_ODA_NONE:
+       default:
+               LOGP(DLGSUP, LOGL_ERROR, "Unexpected SM-RP-DA ID "
+                       "(type=0x%02x)!\n", gsup_msg->sm_rp_da_type);
+               return -EINVAL;
+       }
+
+       /* SM-RP-DA tag | len | ... */
+       msgb_tv_put(msg, OSMO_GSUP_SM_RP_DA_IE, gsup_msg->sm_rp_da_len + 1);
+       msgb_v_put(msg, gsup_msg->sm_rp_da_type); /* ... | id_type */
+
+       if (gsup_msg->sm_rp_da_type == OSMO_GSUP_SMS_SM_RP_ODA_NULL)
+               return 0;
+
+       /* ... | id_enc */
+       id_enc = msgb_put(msg, gsup_msg->sm_rp_da_len);
+       memcpy(id_enc, gsup_msg->sm_rp_da, gsup_msg->sm_rp_da_len);
+
+       return 0;
+}
+
+/*! Decode SM-RP-DA IE (see 7.6.8.1), Destination Address.
+ * \param[out] gsup_msg abstract GSUP message structure
+ * \param[in]  data     pointer to the raw IE payload
+ * \param[in]  data_len length of IE pointed by \ref data
+ * \returns 0 in case of success, negative in case of error
+ */
+int osmo_gsup_sms_decode_sm_rp_da(struct osmo_gsup_message *gsup_msg,
+       uint8_t *data, size_t data_len)
+{
+       uint8_t *ptr = data;
+       uint8_t id_type;
+
+       /* There should be at least id_type */
+       if (data_len < 1) {
+               LOGP(DLGSUP, LOGL_ERROR, "Corrupted SM-RP-DA IE "
+                       "(missing identity type)\n");
+               return -EINVAL;
+       }
+
+       /* ... | id_type | id_enc (optional) */
+       id_type = *ptr++;
+       data_len--;
+
+       /* Parse ID type */
+       switch (id_type) {
+       case OSMO_GSUP_SMS_SM_RP_ODA_IMSI:
+       case OSMO_GSUP_SMS_SM_RP_ODA_MSISDN:
+       case OSMO_GSUP_SMS_SM_RP_ODA_SMSC_ADDR:
+               if (!data_len) {
+                       /* ID shall not be empty (if its type != NULL) */
+                       LOGP(DLGSUP, LOGL_ERROR, "Corrupted SM-RP-DA IE "
+                               "(missing encoded identity)\n");
+                       return -EINVAL;
+               }
+
+               gsup_msg->sm_rp_da_type = id_type;
+               gsup_msg->sm_rp_da_len = data_len;
+               gsup_msg->sm_rp_da = ptr;
+               break;
+
+       /* Special case for noSM-RP-DA */
+       case OSMO_GSUP_SMS_SM_RP_ODA_NULL:
+               if (data_len != 0) {
+                       LOGP(DLGSUP, LOGL_ERROR, "Unexpected SM-RP-DA ID, "
+                               "(id_len != 0) for noSM-RP-DA!\n");
+                       return -EINVAL;
+               }
+
+               gsup_msg->sm_rp_da_type = id_type;
+               gsup_msg->sm_rp_da_len = 0;
+               gsup_msg->sm_rp_da = NULL;
+               break;
+
+       case OSMO_GSUP_SMS_SM_RP_ODA_NONE:
+       default:
+               LOGP(DLGSUP, LOGL_ERROR, "Unexpected SM-RP-DA ID "
+                       "(type=0x%02x)!\n", id_type);
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+/*! Encode SM-RP-OA IE (see 7.6.8.2), Originating Address.
+ * \param[out] msg      target message buffer (caller-allocated)
+ * \param[in]  gsup_msg abstract GSUP message structure
+ * \returns 0 in case of success, negative in case of error
+ */
+int osmo_gsup_sms_encode_sm_rp_oa(struct msgb *msg,
+       const struct osmo_gsup_message *gsup_msg)
+{
+       uint8_t *id_enc;
+
+       switch (gsup_msg->sm_rp_oa_type) {
+       case OSMO_GSUP_SMS_SM_RP_ODA_MSISDN:
+       case OSMO_GSUP_SMS_SM_RP_ODA_SMSC_ADDR:
+               /* Prevent NULL-pointer (or empty) dereference */
+               if (gsup_msg->sm_rp_oa == NULL || gsup_msg->sm_rp_oa_len == 0) {
+                       LOGP(DLGSUP, LOGL_ERROR, "Empty?!? SM-RP-OA ID "
+                               "(type=0x%02x)!\n", gsup_msg->sm_rp_oa_type);
+                       return -EINVAL;
+               }
+               break;
+
+       /* Special case for noSM-RP-OA */
+       case OSMO_GSUP_SMS_SM_RP_ODA_NULL:
+               break;
+
+       case OSMO_GSUP_SMS_SM_RP_ODA_NONE:
+       default:
+               LOGP(DLGSUP, LOGL_ERROR, "Unexpected SM-RP-OA ID "
+                       "(type=0x%02x)!\n", gsup_msg->sm_rp_oa_type);
+               return -EINVAL;
+       }
+
+       /* SM-RP-OA tag | len | ... */
+       msgb_tv_put(msg, OSMO_GSUP_SM_RP_OA_IE, gsup_msg->sm_rp_oa_len + 1);
+       msgb_v_put(msg, gsup_msg->sm_rp_oa_type); /* ... | id_type */
+
+       if (gsup_msg->sm_rp_oa_type == OSMO_GSUP_SMS_SM_RP_ODA_NULL)
+               return 0;
+
+       /* ... | id_enc */
+       id_enc = msgb_put(msg, gsup_msg->sm_rp_oa_len);
+       memcpy(id_enc, gsup_msg->sm_rp_oa, gsup_msg->sm_rp_oa_len);
+
+       return 0;
+}
+
+/*! Decode SM-RP-OA IE (see 7.6.8.2), Originating Address.
+ * \param[out] gsup_msg abstract GSUP message structure
+ * \param[in]  data     pointer to the raw IE payload
+ * \param[in]  data_len length of IE pointed by \ref data
+ * \returns 0 in case of success, negative in case of error
+ */
+int osmo_gsup_sms_decode_sm_rp_oa(struct osmo_gsup_message *gsup_msg,
+       uint8_t *data, size_t data_len)
+{
+       uint8_t *ptr = data;
+       uint8_t id_type;
+
+       /* There should be at least id_type */
+       if (data_len < 1) {
+               LOGP(DLGSUP, LOGL_ERROR, "Corrupted SM-RP-OA IE "
+                       "(missing identity type)\n");
+               return -EINVAL;
+       }
+
+       /* ... | id_type | id_enc (optional) */
+       id_type = *ptr++;
+       data_len--;
+
+       /* Parse ID type */
+       switch (id_type) {
+       case OSMO_GSUP_SMS_SM_RP_ODA_IMSI:
+       case OSMO_GSUP_SMS_SM_RP_ODA_MSISDN:
+       case OSMO_GSUP_SMS_SM_RP_ODA_SMSC_ADDR:
+               if (!data_len) {
+                       /* ID shall not be empty (if its type != NULL) */
+                       LOGP(DLGSUP, LOGL_ERROR, "Corrupted SM-RP-OA IE "
+                               "(missing encoded identity)\n");
+                       return -EINVAL;
+               }
+
+               gsup_msg->sm_rp_oa_type = id_type;
+               gsup_msg->sm_rp_oa_len = data_len;
+               gsup_msg->sm_rp_oa = ptr;
+               break;
+
+       /* Special case for noSM-RP-DA */
+       case OSMO_GSUP_SMS_SM_RP_ODA_NULL:
+               if (data_len != 0) {
+                       LOGP(DLGSUP, LOGL_ERROR, "Unexpected SM-RP-OA ID, "
+                               "(id_len != 0) for noSM-RP-DA!\n");
+                       return -EINVAL;
+               }
+
+               gsup_msg->sm_rp_oa_type = id_type;
+               gsup_msg->sm_rp_oa_len = 0;
+               gsup_msg->sm_rp_oa = NULL;
+               break;
+
+       case OSMO_GSUP_SMS_SM_RP_ODA_NONE:
+       default:
+               LOGP(DLGSUP, LOGL_ERROR, "Unexpected SM-RP-OA ID "
+                       "(type=0x%02x)!\n", id_type);
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+/*! @} */
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 959d182..90c2195 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -523,6 +523,11 @@
 osmo_gsup_session_state_names;
 osmo_gsup_get_err_msg_type;

+osmo_gsup_sms_encode_sm_rp_da;
+osmo_gsup_sms_decode_sm_rp_da;
+osmo_gsup_sms_encode_sm_rp_oa;
+osmo_gsup_sms_decode_sm_rp_oa;
+
 osmo_oap_encode;
 osmo_oap_decode;

diff --git a/tests/gsup/gsup_test.c b/tests/gsup/gsup_test.c
index 9712d77..0936893 100644
--- a/tests/gsup/gsup_test.c
+++ b/tests/gsup/gsup_test.c
@@ -217,6 +217,69 @@
                                0x02, 0x01, 0x47,
        };

+       static const uint8_t send_mo_forward_sm_req[] = {
+               0x24, /* OSMO_GSUP_MSGT_MO_FORWARD_SM_REQUEST */
+               TEST_IMSI_IE,
+
+               /* SM related IEs */
+               0x40, 0x01, /* SM-RP-MR (Message Reference) */
+                       0xfa,
+               0x41, 0x08, /* SM-RP-DA (Destination Address) */
+                       0x03, /* SMSC address */
+                               0x91, 0x52, 0x75, 0x47, 0x99, 0x09, 0x82,
+               0x42, 0x01, /* SM-RP-OA (Originating Address) */
+                       0xff, /* Special case: noSM-RP-OA */
+               0x43, 0x04, /* SM-RP-UI (TPDU) */
+                       0xde, 0xad, 0xbe, 0xef,
+       };
+
+       static const uint8_t send_mt_forward_sm_req[] = {
+               0x28, /* OSMO_GSUP_MSGT_MT_FORWARD_SM_REQUEST */
+               TEST_IMSI_IE,
+
+               /* SM related IEs */
+               0x40, 0x01, /* SM-RP-MR (Message Reference) */
+                       0xfa,
+               0x41, 0x09, /* SM-RP-DA (Destination Address) */
+                       0x01, /* IMSI */
+                               0x21, 0x43, 0x65, 0x87, 0x09, 0x21, 0x43, 0xf5,
+               0x42, 0x08, /* SM-RP-OA (Originating Address) */
+                       0x03, /* SMSC address */
+                               0x91, 0x52, 0x75, 0x47, 0x99, 0x09, 0x82,
+               0x43, 0x04, /* SM-RP-UI (TPDU) */
+                       0xde, 0xad, 0xbe, 0xef,
+               0x45, 0x01, /* SM-RP-MMS (More Messages to Send) */
+                       0x01,
+       };
+
+       static const uint8_t send_mo_mt_forward_sm_err[] = {
+               0x25, /* OSMO_GSUP_MSGT_MO_FORWARD_SM_ERROR */
+               TEST_IMSI_IE,
+
+               /* Session related IEs */
+               0x30, 0x04, /* Session ID */
+                       0xde, 0xad, 0xbe, 0xef,
+               0x31, 0x01, /* Session state (END) */
+                       0x03,
+
+               /* SM related IEs */
+               0x40, 0x01, /* SM-RP-MR (Message Reference) */
+                       0xfa,
+               0x44, 0x01, /* SM-RP-Cause value */
+                       0xaf,
+       };
+
+       static const uint8_t send_mo_mt_forward_sm_rsp[] = {
+               0x2a, /* OSMO_GSUP_MSGT_MT_FORWARD_SM_RESULT */
+               TEST_IMSI_IE,
+
+               /* SM related IEs */
+               0x40, 0x01, /* SM-RP-MR (Message Reference) */
+                       0xfa,
+               0x43, 0x04, /* SM-RP-UI (TPDU) */
+                       0xde, 0xad, 0xbe, 0xef,
+       };
+
        static const struct test {
                char *name;
                const uint8_t *data;
@@ -256,6 +319,14 @@
                        send_ussd_req, sizeof(send_ussd_req)},
                {"SS/USSD processUnstructuredSS-Request / ReturnResult",
                        send_ussd_res, sizeof(send_ussd_res)},
+               {"MO-ForwardSM (MSC -> SMSC) Request",
+                       send_mo_forward_sm_req, sizeof(send_mo_forward_sm_req)},
+               {"MT-ForwardSM (MSC -> SMSC) Request",
+                       send_mt_forward_sm_req, sizeof(send_mt_forward_sm_req)},
+               {"MO-/MT-ForwardSM Response",
+                       send_mo_mt_forward_sm_rsp, 
sizeof(send_mo_mt_forward_sm_rsp)},
+               {"MO-/MT-ForwardSM Error",
+                       send_mo_mt_forward_sm_err, 
sizeof(send_mo_mt_forward_sm_err)},
        };

        printf("Test GSUP message decoding/encoding\n");
@@ -323,7 +394,7 @@
                                 * FIXME: share the maximal IE value somehow
                                 * in order to avoid manual updating of this
                                 */
-                               OSMO_ASSERT(t->data[j+0] <= 
OSMO_GSUP_SS_INFO_IE);
+                               OSMO_ASSERT(t->data[j+0] <= 
OSMO_GSUP_SM_RP_MMS_IE);
                                OSMO_ASSERT(t->data[j+1] <= ie_end - j - 2);

                                ie_end = j;
diff --git a/tests/gsup/gsup_test.err b/tests/gsup/gsup_test.err
index ac71ac2..4a1357c 100644
--- a/tests/gsup/gsup_test.err
+++ b/tests/gsup/gsup_test.err
@@ -49,6 +49,18 @@
   generated message: 22 01 08 21 43 65 87 09 21 43 f5 30 04 de ad be ef 31 01 
03 35 08 a3 06 02 01 01 02 01 47
   original message:  22 01 08 21 43 65 87 09 21 43 f5 30 04 de ad be ef 31 01 
03 35 08 a3 06 02 01 01 02 01 47
   IMSI:              123456789012345
+  generated message: 24 01 08 21 43 65 87 09 21 43 f5 40 01 fa 41 08 03 91 52 
75 47 99 09 82 42 01 ff 43 04 de ad be ef
+  original message:  24 01 08 21 43 65 87 09 21 43 f5 40 01 fa 41 08 03 91 52 
75 47 99 09 82 42 01 ff 43 04 de ad be ef
+  IMSI:              123456789012345
+  generated message: 28 01 08 21 43 65 87 09 21 43 f5 40 01 fa 41 09 01 21 43 
65 87 09 21 43 f5 42 08 03 91 52 75 47 99 09 82 43 04 de ad be ef 45 01 01
+  original message:  28 01 08 21 43 65 87 09 21 43 f5 40 01 fa 41 09 01 21 43 
65 87 09 21 43 f5 42 08 03 91 52 75 47 99 09 82 43 04 de ad be ef 45 01 01
+  IMSI:              123456789012345
+  generated message: 2a 01 08 21 43 65 87 09 21 43 f5 40 01 fa 43 04 de ad be 
ef
+  original message:  2a 01 08 21 43 65 87 09 21 43 f5 40 01 fa 43 04 de ad be 
ef
+  IMSI:              123456789012345
+  generated message: 25 01 08 21 43 65 87 09 21 43 f5 30 04 de ad be ef 31 01 
03 40 01 fa 44 01 af
+  original message:  25 01 08 21 43 65 87 09 21 43 f5 30 04 de ad be ef 31 01 
03 40 01 fa 44 01 af
+  IMSI:              123456789012345
   message 0: tested 11 truncations, 11 parse failures
   message 1: tested 14 truncations, 13 parse failures
   message 2: tested 83 truncations, 81 parse failures
@@ -66,21 +78,29 @@
   message 14: tested 20 truncations, 18 parse failures
   message 15: tested 42 truncations, 39 parse failures
   message 16: tested 30 truncations, 27 parse failures
+  message 17: tested 33 truncations, 29 parse failures
+  message 18: tested 44 truncations, 39 parse failures
+  message 19: tested 20 truncations, 18 parse failures
+  message 20: tested 26 truncations, 22 parse failures
 DLGSUP Stopping DLGSUP logging
   message 0: tested 2816 modifications, 510 parse failures
-  message 1: tested 3584 modifications, 768 parse failures
-  message 2: tested 21248 modifications, 2571 parse failures
+  message 1: tested 3584 modifications, 770 parse failures
+  message 2: tested 21248 modifications, 2575 parse failures
   message 3: tested 2816 modifications, 510 parse failures
-  message 4: tested 3584 modifications, 768 parse failures
-  message 5: tested 20736 modifications, 4010 parse failures
-  message 6: tested 3584 modifications, 769 parse failures
-  message 7: tested 3584 modifications, 768 parse failures
+  message 4: tested 3584 modifications, 770 parse failures
+  message 5: tested 20736 modifications, 4022 parse failures
+  message 6: tested 3584 modifications, 771 parse failures
+  message 7: tested 3584 modifications, 770 parse failures
   message 8: tested 2816 modifications, 510 parse failures
   message 9: tested 2816 modifications, 510 parse failures
-  message 10: tested 3584 modifications, 768 parse failures
-  message 11: tested 3328 modifications, 767 parse failures
-  message 12: tested 54016 modifications, 4622 parse failures
+  message 10: tested 3584 modifications, 770 parse failures
+  message 11: tested 3328 modifications, 769 parse failures
+  message 12: tested 54016 modifications, 4626 parse failures
   message 13: tested 11520 modifications, 1026 parse failures
-  message 14: tested 5120 modifications, 1026 parse failures
-  message 15: tested 10752 modifications, 1256 parse failures
-  message 16: tested 7680 modifications, 1265 parse failures
+  message 14: tested 5120 modifications, 1030 parse failures
+  message 15: tested 10752 modifications, 1262 parse failures
+  message 16: tested 7680 modifications, 1271 parse failures
+  message 17: tested 8448 modifications, 2053 parse failures
+  message 18: tested 11264 modifications, 2307 parse failures
+  message 19: tested 5120 modifications, 1031 parse failures
+  message 20: tested 6656 modifications, 1546 parse failures
diff --git a/tests/gsup/gsup_test.ok b/tests/gsup/gsup_test.ok
index d63dd2d..7a9455d 100644
--- a/tests/gsup/gsup_test.ok
+++ b/tests/gsup/gsup_test.ok
@@ -33,4 +33,12 @@
           SS/USSD processUnstructuredSS-Request / Invoke OK
   Testing SS/USSD processUnstructuredSS-Request / ReturnResult
           SS/USSD processUnstructuredSS-Request / ReturnResult OK
+  Testing MO-ForwardSM (MSC -> SMSC) Request
+          MO-ForwardSM (MSC -> SMSC) Request OK
+  Testing MT-ForwardSM (MSC -> SMSC) Request
+          MT-ForwardSM (MSC -> SMSC) Request OK
+  Testing MO-/MT-ForwardSM Response
+          MO-/MT-ForwardSM Response OK
+  Testing MO-/MT-ForwardSM Error
+          MO-/MT-ForwardSM Error OK
 Done.

--
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: Ibe325c64ae2d6c626b232533bb4cbc65fc2b5d71
Gerrit-Change-Number: 11069
Gerrit-PatchSet: 12
Gerrit-Owner: Vadim Yanitskiy <axilira...@gmail.com>
Gerrit-Reviewer: Harald Welte <lafo...@gnumonks.org>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Neels Hofmeyr <nhofm...@sysmocom.de>
Gerrit-Reviewer: Stefan Sperling <s...@stsp.name>
Gerrit-Reviewer: Vadim Yanitskiy <axilira...@gmail.com>

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