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/*
* (C) 2018 by Vadim Yanitskiy <axilirator@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;
}
/*! @} */
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