| /* Point-to-Point (PP) Short Message Service (SMS) |
| * Support on Mobile Radio Interface |
| * 3GPP TS 04.11 version 7.1.0 Release 1998 / ETSI TS 100 942 V7.1.0 */ |
| |
| /* (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de> |
| * (C) 2009 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2010-2012 by Holger Hans Peter Freyther <zecke@selfish.org> |
| * (C) 2010 by On-Waves |
| * (C) 2011 by Andreas Eversberg <jolly@eversberg.eu> |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 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 Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <time.h> |
| #include <netinet/in.h> |
| |
| #include "config.h" |
| |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/utils.h> |
| |
| #include <osmocom/gsm/gsm_utils.h> |
| #include <osmocom/gsm/gsm0411_utils.h> |
| #include <osmocom/gsm/protocol/gsm_04_11.h> |
| #include <osmocom/gsm/protocol/gsm_03_40.h> |
| |
| #include <osmocom/msc/debug.h> |
| #include <osmocom/msc/gsm_data.h> |
| #include <osmocom/msc/db.h> |
| #include <osmocom/msc/gsm_subscriber.h> |
| #include <osmocom/msc/gsm_04_08.h> |
| #include <osmocom/msc/signal.h> |
| #include <osmocom/msc/db.h> |
| #include <osmocom/msc/transaction.h> |
| #include <osmocom/msc/vlr.h> |
| #include <osmocom/msc/msub.h> |
| #include <osmocom/msc/msc_a.h> |
| #include <osmocom/msc/paging.h> |
| |
| #ifdef BUILD_SMPP |
| #include "smpp_smsc.h" |
| #endif |
| |
| void *tall_gsms_ctx; |
| static uint32_t new_callref = 0x40000001; |
| |
| struct gsm_sms *sms_alloc(void) |
| { |
| return talloc_zero(tall_gsms_ctx, struct gsm_sms); |
| } |
| |
| void sms_free(struct gsm_sms *sms) |
| { |
| /* drop references to subscriber structure */ |
| if (sms->receiver) |
| vlr_subscr_put(sms->receiver, VSUB_USE_SMS_RECEIVER); |
| #ifdef BUILD_SMPP |
| if (sms->smpp.esme) |
| smpp_esme_put(sms->smpp.esme); |
| #endif |
| |
| talloc_free(sms); |
| } |
| |
| struct gsm_sms *sms_from_text(struct vlr_subscr *receiver, |
| const char *sender_msisdn, |
| int dcs, const char *text) |
| { |
| struct gsm_sms *sms = sms_alloc(); |
| |
| if (!sms) |
| return NULL; |
| |
| vlr_subscr_get(receiver, VSUB_USE_SMS_RECEIVER); |
| sms->receiver = receiver; |
| OSMO_STRLCPY_ARRAY(sms->text, text); |
| |
| OSMO_STRLCPY_ARRAY(sms->src.addr, sender_msisdn); |
| sms->reply_path_req = 0; |
| sms->status_rep_req = 0; |
| sms->ud_hdr_ind = 0; |
| sms->protocol_id = 0; /* implicit */ |
| sms->data_coding_scheme = dcs; |
| OSMO_STRLCPY_ARRAY(sms->dst.addr, receiver->msisdn); |
| /* Generate user_data */ |
| sms->user_data_len = gsm_7bit_encode_n(sms->user_data, sizeof(sms->user_data), |
| sms->text, NULL); |
| |
| return sms; |
| } |
| |
| |
| static void send_signal(int sig_no, |
| struct gsm_trans *trans, |
| struct gsm_sms *sms, |
| int paging_result) |
| { |
| struct sms_signal_data sig; |
| sig.trans = trans; |
| sig.sms = sms; |
| sig.paging_result = paging_result; |
| osmo_signal_dispatch(SS_SMS, sig_no, &sig); |
| } |
| |
| static int gsm411_sendmsg(struct gsm_trans *trans, struct msgb *msg) |
| { |
| LOG_TRANS(trans, LOGL_DEBUG, "GSM4.11 TX %s\n", msgb_hexdump(msg)); |
| msg->l3h = msg->data; |
| return msc_a_tx_dtap_to_i(trans->msc_a, msg); |
| } |
| |
| /* Handle MMTS (More Messages to Send) indication */ |
| static void gsm411_handle_mmts_ind(const struct gsm_trans *trans) |
| { |
| int32_t use_count; |
| |
| OSMO_ASSERT(trans); |
| OSMO_ASSERT(trans->msc_a); |
| |
| use_count = osmo_use_count_by(&trans->msc_a->use_count, MSC_A_USE_SMS_MMTS); |
| OSMO_ASSERT(use_count >= 0); /* Shall not be negative */ |
| |
| if (trans->sms.sm_rp_mmts_ind && use_count == 0) { |
| LOG_TRANS(trans, LOGL_INFO, "Multi-part SMS delivery is initiated\n"); |
| msc_a_get(trans->msc_a, MSC_A_USE_SMS_MMTS); |
| } else if (trans->sms.sm_rp_mmts_ind && use_count > 0) { |
| LOG_TRANS(trans, LOGL_INFO, "Continuing multi-part SMS delivery\n"); |
| } else if (!trans->sms.sm_rp_mmts_ind && use_count > 0) { |
| LOG_TRANS(trans, LOGL_INFO, "Multi-part SMS delivery has been completed\n"); |
| msc_a_put(trans->msc_a, MSC_A_USE_SMS_MMTS); |
| } |
| } |
| |
| /* Paging callback for MT SMS (Paging is triggered by SMC) */ |
| static void mmsms_paging_cb(struct msc_a *msc_a, struct gsm_trans *trans) |
| { |
| struct gsm_sms *sms = trans->sms.sms; |
| |
| LOG_TRANS(trans, LOGL_DEBUG, "%s(%s)\n", __func__, msc_a ? "success" : "expired"); |
| |
| if (msc_a) { |
| /* Paging succeeded */ |
| /* Associate transaction with established connection */ |
| msc_a_get(msc_a, MSC_A_USE_SMS); |
| trans->msc_a = msc_a; |
| |
| /* Multi-part SMS: handle MMTS (More Messages to Send) indication */ |
| gsm411_handle_mmts_ind(trans); |
| |
| /* Confirm successful connection establishment */ |
| gsm411_smc_recv(&trans->sms.smc_inst, GSM411_MMSMS_EST_CNF, NULL, 0); |
| } else { |
| /* Paging expired or failed */ |
| /* Inform SMC about channel establishment failure */ |
| gsm411_smc_recv(&trans->sms.smc_inst, GSM411_MMSMS_REL_IND, NULL, 0); |
| |
| /* gsm411_send_rp_data() doesn't set trans->sms.sms */ |
| if (sms != NULL) { |
| /* Notify the SMSqueue and free stored SMS */ |
| send_signal(S_SMS_UNKNOWN_ERROR, NULL, sms, 0); |
| trans->sms.sms = NULL; |
| sms_free(sms); |
| } |
| |
| /* Destroy this transaction */ |
| trans_free(trans); |
| } |
| } |
| |
| static int gsm411_mmsms_est_req(struct gsm_trans *trans) |
| { |
| /* Subscriber's data shall be associated */ |
| OSMO_ASSERT(trans->vsub != NULL); |
| |
| /* Check if connection is already established */ |
| if (trans->msc_a != NULL) { |
| LOG_TRANS(trans, LOGL_DEBUG, "Using an existing connection\n"); |
| return gsm411_smc_recv(&trans->sms.smc_inst, |
| GSM411_MMSMS_EST_CNF, NULL, 0); |
| } |
| |
| /* Initiate Paging procedure */ |
| LOG_TRANS(trans, LOGL_DEBUG, "Initiating Paging due to MMSMS_EST_REQ\n"); |
| trans->paging_request = paging_request_start(trans->vsub, PAGING_CAUSE_SIGNALLING_LOW_PRIO, |
| mmsms_paging_cb, trans, "MT-SMS"); |
| if (!trans->paging_request) { |
| LOG_TRANS(trans, LOGL_ERROR, "Failed to initiate Paging\n"); |
| /* Inform SMC about channel establishment failure */ |
| gsm411_smc_recv(&trans->sms.smc_inst, GSM411_MMSMS_REL_IND, NULL, 0); |
| trans_free(trans); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /* Prefix msg with a 04.08/04.11 CP header */ |
| static int gsm411_cp_sendmsg(struct msgb *msg, struct gsm_trans *trans, |
| uint8_t msg_type) |
| { |
| struct gsm48_hdr *gh; |
| |
| gh = (struct gsm48_hdr *) msgb_push(msg, sizeof(*gh)); |
| /* Outgoing needs the highest bit set */ |
| gh->proto_discr = GSM48_PDISC_SMS | (trans->transaction_id<<4); |
| gh->msg_type = msg_type; |
| OMSC_LINKID_CB(msg) = trans->dlci; |
| |
| LOG_TRANS(trans, LOGL_DEBUG, "sending CP message (trans=%x)\n", trans->transaction_id); |
| |
| return gsm411_sendmsg(trans, msg); |
| } |
| |
| /* mm_send: receive MMCCSMS sap message from SMC */ |
| static int gsm411_mm_send(struct gsm411_smc_inst *inst, int msg_type, |
| struct msgb *msg, int cp_msg_type) |
| { |
| struct gsm_trans *trans = |
| container_of(inst, struct gsm_trans, sms.smc_inst); |
| int rc = 0; |
| |
| switch (msg_type) { |
| case GSM411_MMSMS_EST_REQ: |
| rc = gsm411_mmsms_est_req(trans); |
| break; |
| case GSM411_MMSMS_DATA_REQ: |
| rc = gsm411_cp_sendmsg(msg, trans, cp_msg_type); |
| return rc; /* gsm411_cp_sendmsg() takes msg ownership */ |
| case GSM411_MMSMS_REL_REQ: |
| LOG_TRANS(trans, LOGL_DEBUG, "Got MMSMS_REL_REQ, destroying transaction.\n"); |
| trans_free(trans); |
| break; |
| default: |
| LOG_TRANS(trans, LOGL_NOTICE, "Unhandled MMCCSMS msg 0x%x\n", msg_type); |
| rc = -EINVAL; |
| } |
| |
| msgb_free(msg); |
| return rc; |
| } |
| |
| /* mm_send: receive MNCCSMS sap message from SMR */ |
| int gsm411_mn_send(struct gsm411_smr_inst *inst, int msg_type, |
| struct msgb *msg) |
| { |
| struct gsm_trans *trans = |
| container_of(inst, struct gsm_trans, sms.smr_inst); |
| |
| /* forward to SMC */ |
| return gsm411_smc_send(&trans->sms.smc_inst, msg_type, msg); |
| } |
| |
| static int gsm340_rx_sms_submit(struct gsm_trans *trans, struct gsm_sms *gsms) |
| { |
| if (db_sms_store(gsms) != 0) { |
| LOG_TRANS(trans, LOGL_ERROR, "Failed to store SMS in Database\n"); |
| return GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER; |
| } |
| /* dispatch a signal to tell higher level about it */ |
| send_signal(S_SMS_SUBMITTED, NULL, gsms, 0); |
| |
| return 0; |
| } |
| |
| /* generate a TPDU address field compliant with 03.40 sec. 9.1.2.5 */ |
| static int gsm340_gen_oa_sub(uint8_t *oa, unsigned int oa_len, |
| const struct gsm_sms_addr *src) |
| { |
| /* network specific, private numbering plan */ |
| return gsm340_gen_oa(oa, oa_len, src->ton, src->npi, src->addr); |
| } |
| |
| /* generate a msgb containing an 03.40 9.2.2.1 SMS-DELIVER TPDU derived from |
| * struct gsm_sms, returns total size of TPDU */ |
| static int gsm340_gen_sms_deliver_tpdu(struct gsm_trans *trans, struct msgb *msg, struct gsm_sms *sms) |
| { |
| uint8_t *smsp; |
| uint8_t oa[12]; /* max len per 03.40 */ |
| uint8_t octet_len; |
| unsigned int old_msg_len = msg->len; |
| int oa_len; |
| |
| /* generate first octet with masked bits */ |
| smsp = msgb_put(msg, 1); |
| /* TP-MTI (message type indicator) */ |
| *smsp = GSM340_SMS_DELIVER_SC2MS; |
| /* TP-MMS (more messages to send) */ |
| if (0 /* FIXME */) |
| *smsp |= 0x04; |
| /* TP-SRI(deliver)/SRR(submit) */ |
| if (sms->status_rep_req) |
| *smsp |= 0x20; |
| /* TP-UDHI (indicating TP-UD contains a header) */ |
| if (sms->ud_hdr_ind) |
| *smsp |= 0x40; |
| |
| /* generate originator address */ |
| oa_len = gsm340_gen_oa_sub(oa, sizeof(oa), &sms->src); |
| if (oa_len < 0) |
| return -ENOSPC; |
| |
| smsp = msgb_put(msg, oa_len); |
| memcpy(smsp, oa, oa_len); |
| |
| /* generate TP-PID */ |
| smsp = msgb_put(msg, 1); |
| *smsp = sms->protocol_id; |
| |
| /* generate TP-DCS */ |
| smsp = msgb_put(msg, 1); |
| *smsp = sms->data_coding_scheme; |
| |
| /* generate TP-SCTS */ |
| smsp = msgb_put(msg, 7); |
| gsm340_gen_scts(smsp, time(NULL)); |
| |
| /* generate TP-UDL */ |
| smsp = msgb_put(msg, 1); |
| *smsp = sms->user_data_len; |
| |
| /* generate TP-UD */ |
| switch (gsm338_get_sms_alphabet(sms->data_coding_scheme)) { |
| case DCS_7BIT_DEFAULT: |
| octet_len = sms->user_data_len*7/8; |
| if (sms->user_data_len*7%8 != 0) |
| octet_len++; |
| /* Warning, user_data_len indicates the amount of septets |
| * (characters), we need amount of octets occupied */ |
| smsp = msgb_put(msg, octet_len); |
| memcpy(smsp, sms->user_data, octet_len); |
| break; |
| case DCS_UCS2: |
| case DCS_8BIT_DATA: |
| smsp = msgb_put(msg, sms->user_data_len); |
| memcpy(smsp, sms->user_data, sms->user_data_len); |
| break; |
| default: |
| LOG_TRANS(trans, LOGL_NOTICE, "Unhandled Data Coding Scheme: 0x%02X\n", |
| sms->data_coding_scheme); |
| break; |
| } |
| |
| return msg->len - old_msg_len; |
| } |
| |
| /* As defined by GSM 03.40, Section 9.2.2.3. */ |
| static int gsm340_gen_sms_status_report_tpdu(struct gsm_trans *trans, struct msgb *msg, |
| struct gsm_sms *sms) |
| { |
| unsigned int old_msg_len = msg->len; |
| uint8_t oa[12]; /* max len per 03.40 */ |
| uint8_t *smsp; |
| int oa_len; |
| |
| /* generate first octet with masked bits */ |
| smsp = msgb_put(msg, 1); |
| /* TP-MTI (message type indicator) */ |
| *smsp = GSM340_SMS_STATUS_REP_SC2MS; |
| /* TP-MMS (more messages to send) */ |
| if (0 /* FIXME */) |
| *smsp |= 0x04; |
| /* TP-MR (message reference) */ |
| smsp = msgb_put(msg, 1); |
| *smsp = sms->msg_ref; |
| |
| /* generate recipient address */ |
| oa_len = gsm340_gen_oa_sub(oa, sizeof(oa), &sms->src); |
| if (oa_len < 0) |
| return -ENOSPC; |
| |
| smsp = msgb_put(msg, oa_len); |
| memcpy(smsp, oa, oa_len); |
| |
| /* generate TP-SCTS (Service centre timestamp) */ |
| smsp = msgb_put(msg, 7); |
| gsm340_gen_scts(smsp, sms->created); |
| |
| /* generate TP-DT (Discharge time, in TP-SCTS format). */ |
| smsp = msgb_put(msg, 7); |
| gsm340_gen_scts(smsp, sms->created); |
| |
| /* TP-ST (status) */ |
| smsp = msgb_put(msg, 1); |
| /* From GSM 03.40, Section 9.2.3.15, 0x00 means OK. */ |
| *smsp = 0x00; |
| |
| LOG_TRANS(trans, LOGL_INFO, "sending status report for SMS reference %x\n", |
| sms->msg_ref); |
| |
| return msg->len - old_msg_len; |
| } |
| |
| static int sms_route_mt_sms(struct gsm_trans *trans, struct gsm_sms *gsms) |
| { |
| int rc; |
| struct msc_a *msc_a = trans->msc_a; |
| struct gsm_network *net = msc_a_net(msc_a); |
| |
| #ifdef BUILD_SMPP |
| /* |
| * Route through SMPP first before going to the local database. In case |
| * of a unroutable message and no local subscriber, SMPP will be tried |
| * twice. In case of an unknown subscriber continue with the normal |
| * delivery of the SMS. |
| */ |
| if (smpp_route_smpp_first()) { |
| rc = smpp_try_deliver(gsms, msc_a); |
| if (rc == GSM411_RP_CAUSE_MO_NUM_UNASSIGNED) |
| /* unknown subscriber, try local */ |
| goto try_local; |
| if (rc < 0) { |
| LOG_TRANS(trans, LOGL_ERROR, "SMS delivery error: %d\n", rc); |
| rc = GSM411_RP_CAUSE_MO_TEMP_FAIL; |
| /* rc will be logged by gsm411_send_rp_error() */ |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_DELIVER_UNKNOWN_ERROR]); |
| } |
| return rc; |
| } |
| |
| try_local: |
| #endif |
| |
| /* determine gsms->receiver based on dialled number */ |
| gsms->receiver = vlr_subscr_find_by_msisdn(net->vlr, gsms->dst.addr, VSUB_USE_SMS_RECEIVER); |
| if (gsms->receiver) |
| return 0; |
| |
| #ifdef BUILD_SMPP |
| /* Avoid a second look-up */ |
| if (smpp_route_smpp_first()) { |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_NO_RECEIVER]); |
| return GSM411_RP_CAUSE_MO_NUM_UNASSIGNED; |
| } |
| |
| rc = smpp_try_deliver(gsms, msc_a); |
| if (rc == GSM411_RP_CAUSE_MO_NUM_UNASSIGNED) { |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_NO_RECEIVER]); |
| } else if (rc < 0) { |
| LOG_TRANS(trans, LOGL_ERROR, "SMS delivery error: %d\n", rc); |
| rc = GSM411_RP_CAUSE_MO_TEMP_FAIL; |
| /* rc will be logged by gsm411_send_rp_error() */ |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_DELIVER_UNKNOWN_ERROR]); |
| } |
| #else |
| rc = GSM411_RP_CAUSE_MO_NUM_UNASSIGNED; |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_NO_RECEIVER]); |
| #endif |
| |
| return rc; |
| } |
| |
| |
| /* process an incoming TPDU (called from RP-DATA) |
| * return value > 0: RP CAUSE for ERROR; < 0: silent error; 0 = success */ |
| static int gsm340_rx_tpdu(struct gsm_trans *trans, struct msgb *msg, |
| uint32_t gsm411_msg_ref) |
| { |
| uint8_t *smsp = msgb_sms(msg); |
| struct gsm_sms *gsms; |
| unsigned int sms_alphabet; |
| uint8_t sms_mti, sms_vpf; |
| uint8_t *sms_vp; |
| uint8_t da_len_bytes; |
| uint8_t address_lv[12]; /* according to 03.40 / 9.1.2.5 */ |
| int rc = 0; |
| struct gsm_network *net; |
| struct vlr_subscr *vsub; |
| |
| if (!trans->msc_a) { |
| LOG_TRANS(trans, LOGL_ERROR, "Insufficient info to process TPDU: " |
| "MSC-A role is NULL?!?\n"); |
| return GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER; |
| } |
| |
| net = msc_a_net(trans->msc_a); |
| vsub = msc_a_vsub(trans->msc_a); |
| if (!net || !vsub) { |
| LOG_TRANS(trans, LOGL_ERROR, "Insufficient info to process TPDU: " |
| "gsm_network and/or vlr_subscr is NULL?!?\n"); |
| return GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER; |
| } |
| |
| /* FIXME: should we do this on success, after all checks? */ |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_SUBMITTED]); |
| |
| gsms = sms_alloc(); |
| if (!gsms) |
| return GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER; |
| |
| /* invert those fields where 0 means active/present */ |
| sms_mti = *smsp & 0x03; |
| sms_vpf = (*smsp & 0x18) >> 3; |
| gsms->status_rep_req = (*smsp & 0x20) >> 5; |
| gsms->ud_hdr_ind = (*smsp & 0x40); |
| /* |
| * Not evaluating MMS (More Messages to Send) because the |
| * lchan stays open anyway. |
| * Not evaluating RP (Reply Path) because we're not aware of its |
| * benefits. |
| */ |
| |
| smsp++; |
| gsms->msg_ref = *smsp++; |
| |
| gsms->gsm411.transaction_id = trans->transaction_id; |
| gsms->gsm411.msg_ref = gsm411_msg_ref; |
| |
| /* length in bytes of the destination address */ |
| da_len_bytes = 2 + *smsp/2 + *smsp%2; |
| if (da_len_bytes > 12) { |
| LOG_TRANS(trans, LOGL_ERROR, "Destination Address > 12 bytes ?!?\n"); |
| rc = GSM411_RP_CAUSE_SEMANT_INC_MSG; |
| goto out; |
| } else if (da_len_bytes < 4) { |
| LOG_TRANS(trans, LOGL_ERROR, "Destination Address < 4 bytes ?!?\n"); |
| rc = GSM411_RP_CAUSE_SEMANT_INC_MSG; |
| goto out; |
| } |
| memset(address_lv, 0, sizeof(address_lv)); |
| memcpy(address_lv, smsp, da_len_bytes); |
| /* mangle first byte to reflect length in bytes, not digits */ |
| address_lv[0] = da_len_bytes - 1; |
| |
| gsms->dst.ton = (address_lv[1] >> 4) & 7; |
| gsms->dst.npi = address_lv[1] & 0xF; |
| /* convert to real number */ |
| if (gsm48_decode_bcd_number2(gsms->dst.addr, |
| sizeof(gsms->dst.addr), address_lv, da_len_bytes, 1)) { |
| LOG_TRANS(trans, LOGL_ERROR, "Failed to decode destination Address\n"); |
| rc = GSM411_RP_CAUSE_SEMANT_INC_MSG; |
| goto out; |
| } |
| smsp += da_len_bytes; |
| |
| gsms->protocol_id = *smsp++; |
| gsms->data_coding_scheme = *smsp++; |
| |
| sms_alphabet = gsm338_get_sms_alphabet(gsms->data_coding_scheme); |
| if (sms_alphabet == 0xffffffff) { |
| rc = GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER; |
| goto out; |
| } |
| |
| switch (sms_vpf) { |
| case GSM340_TP_VPF_RELATIVE: |
| sms_vp = smsp++; |
| break; |
| case GSM340_TP_VPF_ABSOLUTE: |
| case GSM340_TP_VPF_ENHANCED: |
| sms_vp = smsp; |
| /* the additional functionality indicator... */ |
| if (sms_vpf == GSM340_TP_VPF_ENHANCED && *smsp & (1<<7)) |
| smsp++; |
| smsp += 7; |
| break; |
| case GSM340_TP_VPF_NONE: |
| sms_vp = 0; |
| break; |
| default: |
| LOG_TRANS(trans, LOGL_NOTICE, "SMS Validity period not implemented: 0x%02x\n", sms_vpf); |
| rc = GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER; |
| goto out; |
| } |
| |
| /* As per 3GPP TS 03.40, section 9.2.3.16, TP-User-Data-Length (TP-UDL) |
| * may indicate either the number of septets, or the number of octets, |
| * depending on Data Coding Scheme. We store TP-UDL value as-is, |
| * so this should be kept in mind to avoid buffer overruns. */ |
| gsms->user_data_len = *smsp++; |
| if (gsms->user_data_len > 0) { |
| if (sms_alphabet == DCS_7BIT_DEFAULT) { |
| /* TP-UDL is indicated in septets (up to 160) */ |
| if (gsms->user_data_len > GSM340_UDL_SPT_MAX) { |
| LOG_TRANS(trans, LOGL_NOTICE, |
| "TP-User-Data-Length %u (septets) " |
| "is too big, truncating to %u\n", |
| gsms->user_data_len, GSM340_UDL_SPT_MAX); |
| gsms->user_data_len = GSM340_UDL_SPT_MAX; |
| } |
| memcpy(gsms->user_data, smsp, gsm_get_octet_len(gsms->user_data_len)); |
| gsm_7bit_decode_n(gsms->text, sizeof(gsms->text), |
| smsp, gsms->user_data_len); |
| } else { |
| /* TP-UDL is indicated in octets (up to 140) */ |
| if (gsms->user_data_len > GSM340_UDL_OCT_MAX) { |
| LOG_TRANS(trans, LOGL_NOTICE, |
| "TP-User-Data-Length %u (octets) " |
| "is too big, truncating to %u\n", |
| gsms->user_data_len, GSM340_UDL_OCT_MAX); |
| gsms->user_data_len = GSM340_UDL_OCT_MAX; |
| } |
| memcpy(gsms->user_data, smsp, gsms->user_data_len); |
| } |
| } |
| |
| OSMO_STRLCPY_ARRAY(gsms->src.addr, vsub->msisdn); |
| |
| LOG_TRANS(trans, LOGL_INFO, |
| "MO SMS -- MTI: 0x%02x, VPF: 0x%02x, " |
| "MR: 0x%02x PID: 0x%02x, DCS: 0x%02x, DA: %s, " |
| "UserDataLength: 0x%02x, UserData: \"%s\"\n", |
| sms_mti, sms_vpf, gsms->msg_ref, |
| gsms->protocol_id, gsms->data_coding_scheme, gsms->dst.addr, |
| gsms->user_data_len, |
| sms_alphabet == DCS_7BIT_DEFAULT ? gsms->text : |
| osmo_hexdump(gsms->user_data, gsms->user_data_len)); |
| |
| gsms->validity_minutes = gsm340_validity_period(sms_vpf, sms_vp); |
| |
| rc = sms_route_mt_sms(trans, gsms); |
| |
| /* This SMS got routed through SMPP and we are waiting on the response. */ |
| if (gsms->smpp.esme) { |
| return -EINPROGRESS; |
| } |
| /* |
| * This SMS got routed through SMPP or no receiver exists. |
| * In any case, we store it in the database for further processing. |
| */ |
| |
| switch (sms_mti) { |
| case GSM340_SMS_SUBMIT_MS2SC: |
| /* MS is submitting a SMS */ |
| rc = gsm340_rx_sms_submit(trans, gsms); |
| break; |
| case GSM340_SMS_COMMAND_MS2SC: |
| case GSM340_SMS_DELIVER_REP_MS2SC: |
| LOG_TRANS(trans, LOGL_NOTICE, "Unimplemented MTI 0x%02x\n", sms_mti); |
| rc = GSM411_RP_CAUSE_IE_NOTEXIST; |
| break; |
| default: |
| LOG_TRANS(trans, LOGL_NOTICE, "Undefined MTI 0x%02x\n", sms_mti); |
| rc = GSM411_RP_CAUSE_IE_NOTEXIST; |
| break; |
| } |
| out: |
| sms_free(gsms); |
| |
| return rc; |
| } |
| |
| /* Prefix msg with a RP-DATA header and send as SMR DATA */ |
| static int gsm411_rp_sendmsg(struct gsm411_smr_inst *inst, struct msgb *msg, |
| uint8_t rp_msg_type, uint8_t rp_msg_ref, |
| int rl_msg_type) |
| { |
| struct gsm411_rp_hdr *rp; |
| uint8_t len = msg->len; |
| |
| /* GSM 04.11 RP-DATA header */ |
| rp = (struct gsm411_rp_hdr *)msgb_push(msg, sizeof(*rp)); |
| rp->len = len + 2; |
| rp->msg_type = rp_msg_type; |
| rp->msg_ref = rp_msg_ref; |
| |
| return gsm411_smr_send(inst, rl_msg_type, msg); |
| } |
| |
| int gsm411_send_rp_ack(struct gsm_trans *trans, uint8_t msg_ref) |
| { |
| struct msgb *msg = gsm411_msgb_alloc(); |
| |
| LOG_TRANS(trans, LOGL_DEBUG, "TX: SMS RP ACK\n"); |
| |
| return gsm411_rp_sendmsg(&trans->sms.smr_inst, msg, GSM411_MT_RP_ACK_MT, |
| msg_ref, GSM411_SM_RL_REPORT_REQ); |
| } |
| |
| int gsm411_send_rp_error(struct gsm_trans *trans, uint8_t msg_ref, |
| uint8_t cause) |
| { |
| struct msgb *msg = gsm411_msgb_alloc(); |
| |
| msgb_tv_put(msg, 1, cause); |
| |
| LOG_TRANS(trans, LOGL_NOTICE, "TX: SMS RP ERROR, cause %d (%s)\n", cause, |
| get_value_string(gsm411_rp_cause_strs, cause)); |
| |
| return gsm411_rp_sendmsg(&trans->sms.smr_inst, msg, |
| GSM411_MT_RP_ERROR_MT, msg_ref, GSM411_SM_RL_REPORT_REQ); |
| } |
| |
| /* Receive a 04.11 TPDU inside RP-DATA / user data */ |
| static int gsm411_rx_rp_ud(struct msgb *msg, struct gsm_trans *trans, |
| struct gsm411_rp_hdr *rph, |
| uint8_t *dst, uint8_t dst_len) |
| { |
| int rc = 0; |
| |
| if (trans->net->sms_over_gsup) { |
| /* RP-ACK or RP-ERROR is triggered as soon as we get the response */ |
| rc = gsm411_gsup_mo_fwd_sm_req(trans, msg, rph->msg_ref, dst, dst_len); |
| if (rc) /* GSUP message sending error */ |
| return gsm411_send_rp_error(trans, rph->msg_ref, rc); |
| |
| return 0; |
| } |
| |
| rc = gsm340_rx_tpdu(trans, msg, rph->msg_ref); |
| if (rc == 0) |
| return gsm411_send_rp_ack(trans, rph->msg_ref); |
| else if (rc > 0) |
| return gsm411_send_rp_error(trans, rph->msg_ref, rc); |
| else if (rc == -EINPROGRESS) |
| rc = 0; |
| |
| return rc; |
| } |
| |
| /* Receive a 04.11 RP-DATA message in accordance with Section 7.3.1.2 */ |
| static int gsm411_rx_rp_data(struct msgb *msg, struct gsm_trans *trans, |
| struct gsm411_rp_hdr *rph) |
| { |
| uint8_t src_len, dst_len, rpud_len; |
| uint8_t *src = NULL, *dst = NULL , *rp_ud = NULL; |
| |
| /* in the MO case, this should always be zero length */ |
| src_len = rph->data[0]; |
| if (src_len) |
| src = &rph->data[1]; |
| |
| dst_len = rph->data[1+src_len]; |
| if (dst_len) |
| dst = &rph->data[1+src_len+1]; |
| |
| rpud_len = rph->data[1+src_len+1+dst_len]; |
| if (rpud_len) |
| rp_ud = &rph->data[1+src_len+1+dst_len+1]; |
| |
| LOG_TRANS(trans, LOGL_DEBUG, "RX_RP-DATA: src_len=%u, dst_len=%u ud_len=%u\n", |
| src_len, dst_len, rpud_len); |
| |
| if (src_len && src) |
| LOG_TRANS(trans, LOGL_ERROR, "RP-DATA (MO) with SRC ?!?\n"); |
| |
| if (!dst_len || !dst || !rpud_len || !rp_ud) { |
| LOG_TRANS(trans, LOGL_ERROR, |
| "RP-DATA (MO) without DST or TPDU ?!?\n"); |
| gsm411_send_rp_error(trans, rph->msg_ref, |
| GSM411_RP_CAUSE_INV_MAND_INF); |
| return -EIO; |
| } |
| |
| msg->l4h = rp_ud; |
| |
| LOG_TRANS(trans, LOGL_DEBUG, "DST(%u,%s)\n", dst_len, osmo_hexdump(dst, dst_len)); |
| |
| return gsm411_rx_rp_ud(msg, trans, rph, dst, dst_len); |
| } |
| |
| static struct gsm_sms *sms_report_alloc(struct gsm_sms *sms, struct gsm_trans *trans) |
| { |
| struct gsm_sms *sms_report; |
| int len; |
| |
| sms_report = sms_alloc(); |
| OSMO_ASSERT(sms_report); |
| |
| sms_report->msg_ref = sms->msg_ref; |
| sms_report->protocol_id = sms->protocol_id; |
| sms_report->data_coding_scheme = GSM338_DCS_1111_8BIT_DATA; |
| |
| /* Invert address to send status report back to origin. */ |
| sms_report->src = sms->dst; |
| sms_report->dst = sms->src; |
| |
| /* As specified by Appendix B. Delivery Receipt Format. |
| * TODO: Many fields in this string are just set with dummy values, |
| * revisit this. |
| */ |
| len = snprintf((char *)sms_report->user_data, |
| sizeof(sms_report->user_data), |
| "id:%.08llu sub:000 dlvrd:000 submit date:YYMMDDhhmm done date:YYMMDDhhmm stat:DELIVRD err:000 text:%.20s", |
| sms->id, sms->text); |
| sms_report->user_data_len = len; |
| LOG_TRANS(trans, LOGL_NOTICE, "%s\n", sms_report->user_data); |
| |
| /* This represents a sms report. */ |
| sms_report->is_report = true; |
| |
| return sms_report; |
| } |
| |
| static void sms_status_report(struct gsm_sms *gsms, struct gsm_trans *trans) |
| { |
| struct gsm_sms *sms_report; |
| int rc; |
| |
| sms_report = sms_report_alloc(gsms, trans); |
| |
| rc = sms_route_mt_sms(trans, sms_report); |
| if (rc < 0) { |
| LOG_TRANS(trans, LOGL_ERROR, "Failed to send status report! err=%d\n", rc); |
| return; |
| } |
| |
| /* No route via SMPP, send the GSM 03.40 status-report now. */ |
| if (sms_report->receiver) |
| gsm340_rx_sms_submit(trans, sms_report); |
| |
| LOG_TRANS(trans, LOGL_NOTICE, "Status report has been sent\n"); |
| |
| sms_free(sms_report); |
| } |
| |
| /* Receive a 04.11 RP-ACK message (response to RP-DATA from us) */ |
| static int gsm411_rx_rp_ack(struct gsm_trans *trans, |
| struct gsm411_rp_hdr *rph) |
| { |
| struct gsm_sms *sms = trans->sms.sms; |
| |
| /* Acnkowledgement to MT RP_DATA, i.e. the MS confirms it |
| * successfully received a SMS. We can now safely mark it as |
| * transmitted */ |
| |
| if (trans->net->sms_over_gsup) { |
| /* Forward towards SMSC via GSUP */ |
| return gsm411_gsup_mt_fwd_sm_res(trans, rph->msg_ref); |
| } |
| |
| if (!sms) { |
| LOG_TRANS(trans, LOGL_ERROR, "RX RP-ACK but no sms in transaction?!?\n"); |
| return gsm411_send_rp_error(trans, rph->msg_ref, |
| GSM411_RP_CAUSE_PROTOCOL_ERR); |
| } |
| |
| /* mark this SMS as sent in database */ |
| db_sms_mark_delivered(sms); |
| |
| send_signal(S_SMS_DELIVERED, trans, sms, 0); |
| |
| if (sms->status_rep_req) |
| sms_status_report(sms, trans); |
| |
| sms_free(sms); |
| trans->sms.sms = NULL; |
| |
| return 0; |
| } |
| |
| static int gsm411_rx_rp_error(struct gsm_trans *trans, |
| struct gsm411_rp_hdr *rph) |
| { |
| struct msc_a *msc_a = trans->msc_a; |
| struct gsm_network *net = msc_a_net(msc_a); |
| struct gsm_sms *sms = trans->sms.sms; |
| uint8_t cause_len = rph->data[0]; |
| uint8_t cause = rph->data[1]; |
| |
| /* Error in response to MT RP_DATA, i.e. the MS did not |
| * successfully receive the SMS. We need to investigate |
| * the cause and take action depending on it */ |
| |
| LOG_TRANS(trans, LOGL_NOTICE, "RX SMS RP-ERROR, cause %d:%d (%s)\n", |
| cause_len, cause, get_value_string(gsm411_rp_cause_strs, cause)); |
| |
| if (trans->net->sms_over_gsup) { |
| /* Forward towards SMSC via GSUP */ |
| return gsm411_gsup_mt_fwd_sm_err(trans, rph->msg_ref, cause); |
| } |
| |
| if (!sms) { |
| LOG_TRANS(trans, LOGL_ERROR, "RX RP-ERR, but no sms in transaction?!?\n"); |
| return -EINVAL; |
| #if 0 |
| return gsm411_send_rp_error(trans, rph->msg_ref, |
| GSM411_RP_CAUSE_PROTOCOL_ERR); |
| #endif |
| } |
| |
| if (cause == GSM411_RP_CAUSE_MT_MEM_EXCEEDED) { |
| /* MS has not enough memory to store the message. We need |
| * to store this in our database and wait for a SMMA message */ |
| /* FIXME */ |
| send_signal(S_SMS_MEM_EXCEEDED, trans, sms, 0); |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_RP_ERR_MEM]); |
| } else { |
| send_signal(S_SMS_UNKNOWN_ERROR, trans, sms, 0); |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_RP_ERR_OTHER]); |
| } |
| |
| sms_free(sms); |
| trans->sms.sms = NULL; |
| |
| return 0; |
| } |
| |
| static int gsm411_rx_rp_smma(struct msgb *msg, struct gsm_trans *trans, |
| struct gsm411_rp_hdr *rph) |
| { |
| int rc; |
| |
| if (trans->net->sms_over_gsup) { |
| /* RP-ACK or RP-ERROR is triggered as soon as we get the response */ |
| rc = gsm411_gsup_mo_ready_for_sm_req(trans, rph->msg_ref); |
| if (rc) /* GSUP message sending error */ |
| return gsm411_send_rp_error(trans, rph->msg_ref, rc); |
| |
| return 0; |
| } |
| |
| rc = gsm411_send_rp_ack(trans, rph->msg_ref); |
| |
| /* MS tells us that it has memory for more SMS, we need |
| * to check if we have any pending messages for it and then |
| * transfer those */ |
| send_signal(S_SMS_SMMA, trans, NULL, 0); |
| |
| return rc; |
| } |
| |
| /* receive RL DATA */ |
| static int gsm411_rx_rl_data(struct msgb *msg, struct gsm48_hdr *gh, |
| struct gsm_trans *trans) |
| { |
| struct gsm411_rp_hdr *rp_data = (struct gsm411_rp_hdr*)&gh->data; |
| uint8_t msg_type = rp_data->msg_type & 0x07; |
| int rc = 0; |
| |
| switch (msg_type) { |
| case GSM411_MT_RP_DATA_MO: |
| LOG_TRANS(trans, LOGL_DEBUG, "RX SMS RP-DATA (MO)\n"); |
| rc = gsm411_rx_rp_data(msg, trans, rp_data); |
| break; |
| case GSM411_MT_RP_SMMA_MO: |
| LOG_TRANS(trans, LOGL_DEBUG, "RX SMS RP-SMMA\n"); |
| rc = gsm411_rx_rp_smma(msg, trans, rp_data); |
| break; |
| default: |
| LOG_TRANS(trans, LOGL_NOTICE, "Invalid RP type 0x%02x\n", msg_type); |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /* receive RL REPORT */ |
| static int gsm411_rx_rl_report(struct msgb *msg, struct gsm48_hdr *gh, |
| struct gsm_trans *trans) |
| { |
| struct gsm411_rp_hdr *rp_data = (struct gsm411_rp_hdr*)&gh->data; |
| uint8_t msg_type = rp_data->msg_type & 0x07; |
| int rc = 0; |
| |
| switch (msg_type) { |
| case GSM411_MT_RP_ACK_MO: |
| LOG_TRANS(trans, LOGL_DEBUG, "RX SMS RP-ACK (MO)\n"); |
| rc = gsm411_rx_rp_ack(trans, rp_data); |
| break; |
| case GSM411_MT_RP_ERROR_MO: |
| LOG_TRANS(trans, LOGL_DEBUG, "RX SMS RP-ERROR (MO)\n"); |
| rc = gsm411_rx_rp_error(trans, rp_data); |
| break; |
| default: |
| LOG_TRANS(trans, LOGL_NOTICE, "Invalid RP type 0x%02x\n", msg_type); |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /* receive SM-RL sap message from SMR |
| * NOTE: Message is freed by sender |
| */ |
| int gsm411_rl_recv(struct gsm411_smr_inst *inst, int msg_type, |
| struct msgb *msg) |
| { |
| struct gsm_trans *trans = |
| container_of(inst, struct gsm_trans, sms.smr_inst); |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| int rc = 0; |
| |
| switch (msg_type) { |
| case GSM411_SM_RL_DATA_IND: |
| rc = gsm411_rx_rl_data(msg, gh, trans); |
| break; |
| case GSM411_SM_RL_REPORT_IND: |
| if (gh) |
| rc = gsm411_rx_rl_report(msg, gh, trans); |
| break; |
| default: |
| LOG_TRANS(trans, LOGL_NOTICE, "Unhandled SM-RL message 0x%x\n", msg_type); |
| rc = -EINVAL; |
| } |
| |
| return rc; |
| } |
| |
| /* receive MNCCSMS sap message from SMC |
| * NOTE: Message is freed by sender |
| */ |
| static int gsm411_mn_recv(struct gsm411_smc_inst *inst, int msg_type, |
| struct msgb *msg) |
| { |
| struct gsm_trans *trans = |
| container_of(inst, struct gsm_trans, sms.smc_inst); |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| int rc = 0; |
| |
| switch (msg_type) { |
| case GSM411_MNSMS_EST_IND: |
| case GSM411_MNSMS_DATA_IND: |
| LOG_TRANS(trans, LOGL_DEBUG, "MNSMS-DATA/EST-IND\n"); |
| rc = gsm411_smr_recv(&trans->sms.smr_inst, msg_type, msg); |
| break; |
| case GSM411_MNSMS_ERROR_IND: |
| if (gh) |
| LOG_TRANS(trans, LOGL_DEBUG, "MNSMS-ERROR-IND, cause %d (%s)\n", |
| gh->data[0], |
| get_value_string(gsm411_cp_cause_strs, |
| gh->data[0])); |
| else |
| LOG_TRANS(trans, LOGL_DEBUG, "MNSMS-ERROR-IND, no cause\n"); |
| rc = gsm411_smr_recv(&trans->sms.smr_inst, msg_type, msg); |
| break; |
| default: |
| LOG_TRANS(trans, LOGL_NOTICE, "Unhandled MNCCSMS msg 0x%x\n", msg_type); |
| rc = -EINVAL; |
| } |
| |
| return rc; |
| } |
| |
| static struct gsm_trans *gsm411_trans_init(struct gsm_network *net, struct vlr_subscr *vsub, struct msc_a *msc_a, |
| uint8_t tid, bool mo) |
| { |
| /* Allocate a new transaction */ |
| struct gsm_trans *trans = trans_alloc(net, vsub, TRANS_SMS, tid, new_callref++); |
| if (!trans) { |
| LOG_TRANS(trans, LOGL_ERROR, "No memory for transaction\n"); |
| return NULL; |
| } |
| |
| if (msc_a) { |
| msc_a_get(msc_a, MSC_A_USE_SMS); |
| trans->msc_a = msc_a; |
| |
| osmo_fsm_inst_dispatch(msc_a->c.fi, MSC_A_EV_TRANSACTION_ACCEPTED, trans); |
| if (mo) { |
| if (!osmo_use_count_by(&msc_a->use_count, MSC_A_USE_CM_SERVICE_SMS)) |
| LOG_TRANS(trans, LOGL_ERROR, "MO SMS without prior CM Service Request\n"); |
| else |
| msc_a_put(msc_a, MSC_A_USE_CM_SERVICE_SMS); |
| } |
| } |
| |
| /* Init both SMC and SMR state machines */ |
| gsm411_smc_init(&trans->sms.smc_inst, 0, 1, |
| gsm411_mn_recv, gsm411_mm_send); |
| gsm411_smr_init(&trans->sms.smr_inst, 0, 1, |
| gsm411_rl_recv, gsm411_mn_send); |
| |
| return trans; |
| } |
| |
| /* Assigns an (unused) SM-RP-MR value to a given transaction */ |
| static int gsm411_assign_sm_rp_mr(struct gsm_trans *trans) |
| { |
| uint8_t mr; |
| |
| /* After allocation a given transaction has zero-initialized |
| * SM-RP-MR value, so trans_find_by_sm_rp_mr() may consider |
| * 0x00 as used. This is why we "poison" this transaction |
| * using the highest value. */ |
| trans->sms.sm_rp_mr = 0xff; |
| |
| /* According to 8.2.3, MR is in the range 0 through 255 */ |
| for (mr = 0x00; mr < 0xff; mr++) { |
| if (trans_find_by_sm_rp_mr(trans->net, trans->vsub, mr)) |
| continue; /* this MR is busy, find another one */ |
| /* An unused value has been found, assign it */ |
| trans->sms.sm_rp_mr = mr; |
| return 0; |
| } |
| |
| /* All possible values are busy */ |
| return -EBUSY; |
| } |
| |
| static struct gsm_trans *gsm411_alloc_mt_trans(struct gsm_network *net, |
| struct vlr_subscr *vsub) |
| { |
| struct msc_a *msc_a; |
| struct gsm_trans *trans; |
| int tid; |
| |
| /* Generate a new transaction ID */ |
| tid = trans_assign_trans_id(net, vsub, TRANS_SMS); |
| if (tid == -1) { |
| LOGP(DLSMS, LOGL_ERROR, "No available transaction IDs\n"); |
| return NULL; |
| } |
| |
| /* Attempt to find an existing connection */ |
| msc_a = msc_a_for_vsub(vsub, true); |
| |
| /* Allocate a new transaction */ |
| trans = gsm411_trans_init(net, vsub, msc_a, tid, false); |
| if (!trans) |
| return NULL; |
| |
| LOG_TRANS(trans, LOGL_INFO, "Going to send a MT SMS\n"); |
| |
| /* Assign a unique SM-RP Message Reference */ |
| if (gsm411_assign_sm_rp_mr(trans) != 0) { |
| LOG_TRANS(trans, LOGL_ERROR, "Failed to assign SM-RP-MR\n"); |
| trans_free(trans); |
| return NULL; |
| } |
| |
| /* Use SAPI 3 (see GSM 04.11, section 2.3) */ |
| trans->dlci = UM_SAPI_SMS; |
| |
| return trans; |
| } |
| |
| /* High-level function to send an SMS to a given subscriber */ |
| int gsm411_send_sms(struct gsm_network *net, |
| struct vlr_subscr *vsub, |
| struct gsm_sms *sms) |
| { |
| uint8_t *data, *rp_ud_len; |
| struct gsm_trans *trans; |
| struct msgb *msg; |
| int rc; |
| |
| /* Allocate a new transaction for MT SMS */ |
| trans = gsm411_alloc_mt_trans(net, vsub); |
| if (!trans) { |
| send_signal(S_SMS_UNKNOWN_ERROR, NULL, sms, 0); |
| sms_free(sms); |
| return -ENOMEM; |
| } |
| |
| /* Allocate a message buffer for to be encoded SMS */ |
| msg = gsm411_msgb_alloc(); |
| if (!msg) { |
| send_signal(S_SMS_UNKNOWN_ERROR, NULL, sms, 0); |
| trans_free(trans); |
| sms_free(sms); |
| return -ENOMEM; |
| } |
| |
| /* Hardcode SMSC Originating Address for now */ |
| data = (uint8_t *)msgb_put(msg, 8); |
| data[0] = 0x07; /* originator length == 7 */ |
| data[1] = 0x91; /* type of number: international, ISDN */ |
| data[2] = 0x44; /* 447785016005 */ |
| data[3] = 0x77; |
| data[4] = 0x58; |
| data[5] = 0x10; |
| data[6] = 0x06; |
| data[7] = 0x50; |
| |
| /* Hardcoded Destination Address */ |
| data = (uint8_t *)msgb_put(msg, 1); |
| data[0] = 0; /* destination length == 0 */ |
| |
| /* obtain a pointer for the rp_ud_len, so we can fill it later */ |
| rp_ud_len = (uint8_t *)msgb_put(msg, 1); |
| |
| if (sms->is_report) { |
| /* generate the 03.40 SMS-STATUS-REPORT TPDU */ |
| rc = gsm340_gen_sms_status_report_tpdu(trans, msg, sms); |
| } else { |
| /* generate the 03.40 SMS-DELIVER TPDU */ |
| rc = gsm340_gen_sms_deliver_tpdu(trans, msg, sms); |
| } |
| if (rc < 0) { |
| send_signal(S_SMS_UNKNOWN_ERROR, trans, sms, 0); |
| sms_free(sms); |
| trans_free(trans); |
| msgb_free(msg); |
| return rc; |
| } |
| |
| *rp_ud_len = rc; |
| |
| /* Store a pointer to abstract SMS representation */ |
| trans->sms.sms = sms; |
| |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_DELIVERED]); |
| db_sms_inc_deliver_attempts(trans->sms.sms); |
| |
| return gsm411_rp_sendmsg(&trans->sms.smr_inst, msg, |
| GSM411_MT_RP_DATA_MT, trans->sms.sm_rp_mr, |
| GSM411_SM_RL_DATA_REQ); |
| } |
| |
| /* Low-level function to send raw RP-DATA to a given subscriber */ |
| int gsm411_send_rp_data(struct gsm_network *net, struct vlr_subscr *vsub, |
| size_t sm_rp_oa_len, const uint8_t *sm_rp_oa, |
| size_t sm_rp_ud_len, const uint8_t *sm_rp_ud, |
| bool sm_rp_mmts_ind) |
| { |
| struct gsm_trans *trans; |
| struct msgb *msg; |
| |
| /* Allocate a new transaction for MT SMS */ |
| trans = gsm411_alloc_mt_trans(net, vsub); |
| if (!trans) |
| return -ENOMEM; |
| |
| /* Multi-part SMS: handle MMTS (More Messages to Send) indication */ |
| trans->sms.sm_rp_mmts_ind = sm_rp_mmts_ind; |
| if (trans->msc_a != NULL) |
| gsm411_handle_mmts_ind(trans); |
| |
| /* Allocate a message buffer for to be encoded SMS */ |
| msg = gsm411_msgb_alloc(); |
| if (!msg) { |
| trans_free(trans); |
| return -ENOMEM; |
| } |
| |
| /* Encode SM-RP-OA (SMSC address) */ |
| msgb_lv_put(msg, sm_rp_oa_len, sm_rp_oa); |
| |
| /* Encode SM-RP-DA (shall be empty, len=0) */ |
| msgb_v_put(msg, 0x00); |
| |
| /* Encode RP-UD itself (SM TPDU) */ |
| msgb_lv_put(msg, sm_rp_ud_len, sm_rp_ud); |
| |
| rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_SMS_DELIVERED]); |
| |
| return gsm411_rp_sendmsg(&trans->sms.smr_inst, msg, |
| GSM411_MT_RP_DATA_MT, trans->sms.sm_rp_mr, |
| GSM411_SM_RL_DATA_REQ); |
| } |
| |
| /* Entry point for incoming GSM48_PDISC_SMS from abis_rsl.c */ |
| int gsm0411_rcv_sms(struct msc_a *msc_a, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| uint8_t msg_type = gh->msg_type; |
| uint8_t transaction_id = gsm48_hdr_trans_id_flip_ti(gh); |
| struct gsm411_rp_hdr *rph = (struct gsm411_rp_hdr *) gh->data; |
| struct gsm_trans *trans; |
| int new_trans = 0; |
| int rc = 0; |
| struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
| struct gsm_network *net = msc_a_net(msc_a); |
| |
| trans = trans_find_by_id(msc_a, TRANS_SMS, transaction_id); |
| |
| /* |
| * A transaction we created but don't know about? |
| */ |
| if (!trans && (transaction_id & 0x8) == 0) { |
| LOG_TRANS(trans, LOGL_ERROR, "trans_id=%x allocated by us but known " |
| "to us anymore. We are ignoring it, maybe a CP-ERROR " |
| "from a MS?\n", |
| transaction_id); |
| return -EINVAL; |
| } |
| |
| if (!trans) { |
| new_trans = 1; |
| trans = gsm411_trans_init(net, vsub, msc_a, transaction_id, true); |
| if (!trans) { |
| /* FIXME: send some error message */ |
| return -ENOMEM; |
| } |
| |
| trans->sms.sm_rp_mr = rph->msg_ref; /* SM-RP Message Reference */ |
| trans->dlci = OMSC_LINKID_CB(msg); /* DLCI as received from BSC */ |
| } |
| |
| LOG_TRANS(trans, LOGL_DEBUG, "receiving SMS message %s\n", |
| gsm48_pdisc_msgtype_name(gsm48_hdr_pdisc(gh), gsm48_hdr_msg_type(gh))); |
| |
| /* According to section 5.3.4, due to structure of message flow on |
| * SAPI 0 and 3 it is possible that the CP-ACK of a short message |
| * transfer might not be received. In this case the reception of |
| * CP-DATA may be interpreted as the reception of the awaited |
| * CP-ACK (implicit) and CP-DATA message. */ |
| if (trans->sms.smc_inst.cp_state == GSM411_CPS_IDLE |
| && msg_type == GSM411_MT_CP_DATA) { |
| int i; |
| struct gsm_trans *ptrans; |
| |
| /* Scan through all remote initiated transactions */ |
| for (i=8; i<15; i++) { |
| if (i == transaction_id) |
| continue; |
| |
| ptrans = trans_find_by_id(msc_a, TRANS_SMS, i); |
| if (!ptrans) |
| continue; |
| |
| LOG_TRANS(ptrans, LOGL_DEBUG, "Implicit CP-ACK for trans_id=%x\n", i); |
| |
| /* Finish it for good */ |
| trans_free(ptrans); |
| } |
| } |
| |
| gsm411_smc_recv(&trans->sms.smc_inst, |
| (new_trans) ? GSM411_MMSMS_EST_IND : GSM411_MMSMS_DATA_IND, |
| msg, msg_type); |
| |
| return rc; |
| } |
| |
| void _gsm411_sms_trans_free(struct gsm_trans *trans) |
| { |
| /* cleanup SMS instance */ |
| gsm411_smr_clear(&trans->sms.smr_inst); |
| trans->sms.smr_inst.rl_recv = NULL; |
| trans->sms.smr_inst.mn_send = NULL; |
| |
| gsm411_smc_clear(&trans->sms.smc_inst); |
| trans->sms.smc_inst.mn_recv = NULL; |
| trans->sms.smc_inst.mm_send = NULL; |
| |
| if (trans->sms.sms) { |
| LOG_TRANS(trans, LOGL_ERROR, "Freeing transaction that still contains an SMS -- discarding\n"); |
| send_signal(S_SMS_UNKNOWN_ERROR, trans, trans->sms.sms, 0); |
| sms_free(trans->sms.sms); |
| trans->sms.sms = NULL; |
| } |
| } |
| |
| /* Process incoming SAPI N-REJECT from BSC */ |
| void gsm411_sapi_n_reject(struct msc_a *msc_a) |
| { |
| struct gsm_network *net; |
| struct gsm_trans *trans, *tmp; |
| |
| net = msc_a_net(msc_a); |
| |
| llist_for_each_entry_safe(trans, tmp, &net->trans_list, entry) { |
| struct gsm_sms *sms; |
| |
| if (trans->msc_a != msc_a) |
| continue; |
| if (trans->type != TRANS_SMS) |
| continue; |
| |
| sms = trans->sms.sms; |
| if (!sms) { |
| LOG_TRANS(trans, LOGL_ERROR, "SAPI Reject but no SMS.\n"); |
| continue; |
| } |
| |
| send_signal(S_SMS_UNKNOWN_ERROR, trans, sms, 0); |
| sms_free(sms); |
| trans->sms.sms = NULL; |
| trans_free(trans); |
| } |
| } |
| |