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authorJonathan Santos <jrsantos@jonathanrsantos.com>2011-05-25 13:54:02 -0400
committerJonathan Santos <jrsantos@jonathanrsantos.com>2011-05-25 13:54:02 -0400
commit03fd8d014f9871896a86534432c8757d65a576fe (patch)
treebad087cacfb6b106f6ca542bf92ef2e2ecea5dd3 /src/libmsc/gsm_04_11.c
parente7dae79f5839029279c9fd4543804882c019bf42 (diff)
Import upstream version 0.9.13upstream/0.9.13
Diffstat (limited to 'src/libmsc/gsm_04_11.c')
-rw-r--r--src/libmsc/gsm_04_11.c1240
1 files changed, 1240 insertions, 0 deletions
diff --git a/src/libmsc/gsm_04_11.c b/src/libmsc/gsm_04_11.c
new file mode 100644
index 00000000..812e758c
--- /dev/null
+++ b/src/libmsc/gsm_04_11.c
@@ -0,0 +1,1240 @@
+/* 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 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 by On-Waves
+ *
+ * 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 <osmocore/msgb.h>
+#include <osmocore/tlv.h>
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/db.h>
+#include <openbsc/gsm_subscriber.h>
+#include <openbsc/gsm_04_11.h>
+#include <openbsc/gsm_04_08.h>
+#include <osmocore/gsm_utils.h>
+#include <openbsc/abis_rsl.h>
+#include <openbsc/signal.h>
+#include <openbsc/db.h>
+#include <osmocore/talloc.h>
+#include <openbsc/transaction.h>
+#include <openbsc/paging.h>
+#include <openbsc/bsc_rll.h>
+#include <openbsc/chan_alloc.h>
+#include <openbsc/bsc_api.h>
+
+#define GSM411_ALLOC_SIZE 1024
+#define GSM411_ALLOC_HEADROOM 128
+
+void *tall_gsms_ctx;
+static u_int32_t new_callref = 0x40000001;
+
+static const struct value_string cp_cause_strs[] = {
+ { GSM411_CP_CAUSE_NET_FAIL, "Network Failure" },
+ { GSM411_CP_CAUSE_CONGESTION, "Congestion" },
+ { GSM411_CP_CAUSE_INV_TRANS_ID, "Invalid Transaction ID" },
+ { GSM411_CP_CAUSE_SEMANT_INC_MSG, "Semantically Incorrect Message" },
+ { GSM411_CP_CAUSE_INV_MAND_INF, "Invalid Mandatory Information" },
+ { GSM411_CP_CAUSE_MSGTYPE_NOTEXIST, "Message Type doesn't exist" },
+ { GSM411_CP_CAUSE_MSG_INCOMP_STATE,
+ "Message incompatible with protocol state" },
+ { GSM411_CP_CAUSE_IE_NOTEXIST, "IE does not exist" },
+ { GSM411_CP_CAUSE_PROTOCOL_ERR, "Protocol Error" },
+ { 0, 0 }
+};
+
+static const struct value_string rp_cause_strs[] = {
+ { GSM411_RP_CAUSE_MO_NUM_UNASSIGNED, "(MO) Number not assigned" },
+ { GSM411_RP_CAUSE_MO_OP_DET_BARR, "(MO) Operator determined barring" },
+ { GSM411_RP_CAUSE_MO_CALL_BARRED, "(MO) Call barred" },
+ { GSM411_RP_CAUSE_MO_SMS_REJECTED, "(MO) SMS rejected" },
+ { GSM411_RP_CAUSE_MO_DEST_OUT_OF_ORDER, "(MO) Destination out of order" },
+ { GSM411_RP_CAUSE_MO_UNIDENTIFIED_SUBSCR, "(MO) Unidentified subscriber" },
+ { GSM411_RP_CAUSE_MO_FACILITY_REJ, "(MO) Facility reject" },
+ { GSM411_RP_CAUSE_MO_UNKNOWN_SUBSCR, "(MO) Unknown subscriber" },
+ { GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER, "(MO) Network out of order" },
+ { GSM411_RP_CAUSE_MO_TEMP_FAIL, "(MO) Temporary failure" },
+ { GSM411_RP_CAUSE_MO_CONGESTION, "(MO) Congestion" },
+ { GSM411_RP_CAUSE_MO_RES_UNAVAIL, "(MO) Resource unavailable" },
+ { GSM411_RP_CAUSE_MO_REQ_FAC_NOTSUBSCR, "(MO) Requested facility not subscribed" },
+ { GSM411_RP_CAUSE_MO_REQ_FAC_NOTIMPL, "(MO) Requested facility not implemented" },
+ { GSM411_RP_CAUSE_MO_INTERWORKING, "(MO) Interworking" },
+ /* valid only for MT */
+ { GSM411_RP_CAUSE_MT_MEM_EXCEEDED, "(MT) Memory Exceeded" },
+ /* valid for both directions */
+ { GSM411_RP_CAUSE_INV_TRANS_REF, "Invalid Transaction Reference" },
+ { GSM411_RP_CAUSE_SEMANT_INC_MSG, "Semantically Incorrect Message" },
+ { GSM411_RP_CAUSE_INV_MAND_INF, "Invalid Mandatory Information" },
+ { GSM411_RP_CAUSE_MSGTYPE_NOTEXIST, "Message Type non-existant" },
+ { GSM411_RP_CAUSE_MSG_INCOMP_STATE, "Message incompatible with protocol state" },
+ { GSM411_RP_CAUSE_IE_NOTEXIST, "Information Element not existing" },
+ { GSM411_RP_CAUSE_PROTOCOL_ERR, "Protocol Error" },
+ { 0, NULL }
+};
+
+
+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->sender)
+ subscr_put(sms->sender);
+ if (sms->receiver)
+ subscr_put(sms->receiver);
+
+ talloc_free(sms);
+}
+
+struct gsm_sms *sms_from_text(struct gsm_subscriber *receiver, int dcs, const char *text)
+{
+ struct gsm_sms *sms = sms_alloc();
+
+ if (!sms)
+ return NULL;
+
+ sms->receiver = subscr_get(receiver);
+ strncpy(sms->text, text, sizeof(sms->text)-1);
+
+ /* FIXME: don't use ID 1 static */
+ sms->sender = subscr_get_by_id(receiver->net, 1);
+ 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;
+ strncpy(sms->dest_addr, receiver->extension, sizeof(sms->dest_addr)-1);
+ /* Generate user_data */
+ sms->user_data_len = gsm_7bit_encode(sms->user_data, sms->text);
+
+ 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;
+ dispatch_signal(SS_SMS, sig_no, &sig);
+}
+
+/*
+ * This should be called whenever all SMS to a given subscriber
+ * on a given connection has been sent. This will inform the higher
+ * layers that a channel can be given up.
+ */
+static void gsm411_release_conn(struct gsm_subscriber_connection *conn)
+{
+ if (!conn)
+ return;
+
+ subscr_put_channel(conn->subscr);
+}
+
+struct msgb *gsm411_msgb_alloc(void)
+{
+ return msgb_alloc_headroom(GSM411_ALLOC_SIZE, GSM411_ALLOC_HEADROOM,
+ "GSM 04.11");
+}
+
+static int gsm411_sendmsg(struct gsm_subscriber_connection *conn, struct msgb *msg, u_int8_t link_id)
+{
+ DEBUGP(DSMS, "GSM4.11 TX %s\n", hexdump(msg->data, msg->len));
+ msg->l3h = msg->data;
+ return gsm0808_submit_dtap(conn, msg, link_id, 1);
+}
+
+/* SMC TC1* is expired */
+static void cp_timer_expired(void *data)
+{
+ struct gsm_trans *trans = data;
+
+ DEBUGP(DSMS, "SMC Timer TC1* is expired, calling trans_free()\n");
+ /* FIXME: we need to re-transmit the last CP-DATA 1..3 times */
+ trans_free(trans);
+}
+
+/* Prefix msg with a 04.08/04.11 CP header */
+static int gsm411_cp_sendmsg(struct msgb *msg, struct gsm_trans *trans,
+ u_int8_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 = trans->protocol | (trans->transaction_id<<4);
+ gh->msg_type = msg_type;
+
+ /* mobile originating */
+ switch (gh->msg_type) {
+ case GSM411_MT_CP_DATA:
+ /* 5.2.3.1.2: enter MO-wait for CP-ack */
+ /* 5.2.3.2.3: enter MT-wait for CP-ACK */
+ trans->sms.cp_state = GSM411_CPS_WAIT_CP_ACK;
+ trans->sms.cp_timer.data = trans;
+ trans->sms.cp_timer.cb = cp_timer_expired;
+ /* 5.3.2.1: Set Timer TC1A */
+ bsc_schedule_timer(&trans->sms.cp_timer, GSM411_TMR_TC1A);
+ DEBUGP(DSMS, "TX: CP-DATA ");
+ break;
+ case GSM411_MT_CP_ACK:
+ DEBUGP(DSMS, "TX: CP-ACK ");
+ break;
+ case GSM411_MT_CP_ERROR:
+ DEBUGP(DSMS, "TX: CP-ERROR ");
+ break;
+ }
+
+ DEBUGPC(DSMS, "trans=%x\n", trans->transaction_id);
+
+ return gsm411_sendmsg(trans->conn, msg, trans->sms.link_id);
+}
+
+/* Prefix msg with a RP-DATA header and send as CP-DATA */
+static int gsm411_rp_sendmsg(struct msgb *msg, struct gsm_trans *trans,
+ u_int8_t rp_msg_type, u_int8_t rp_msg_ref)
+{
+ struct gsm411_rp_hdr *rp;
+ u_int8_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; /* FIXME: Choose randomly */
+
+ return gsm411_cp_sendmsg(msg, trans, GSM411_MT_CP_DATA);
+}
+
+/* Turn int into semi-octet representation: 98 => 0x89 */
+static u_int8_t bcdify(u_int8_t value)
+{
+ u_int8_t ret;
+
+ ret = value / 10;
+ ret |= (value % 10) << 4;
+
+ return ret;
+}
+
+/* Turn semi-octet representation into int: 0x89 => 98 */
+static u_int8_t unbcdify(u_int8_t value)
+{
+ u_int8_t ret;
+
+ if ((value & 0x0F) > 9 || (value >> 4) > 9)
+ LOGP(DSMS, LOGL_ERROR,
+ "unbcdify got too big nibble: 0x%02X\n", value);
+
+ ret = (value&0x0F)*10;
+ ret += value>>4;
+
+ return ret;
+}
+
+/* Generate 03.40 TP-SCTS */
+static void gsm340_gen_scts(u_int8_t *scts, time_t time)
+{
+ struct tm *tm = localtime(&time);
+
+ *scts++ = bcdify(tm->tm_year % 100);
+ *scts++ = bcdify(tm->tm_mon + 1);
+ *scts++ = bcdify(tm->tm_mday);
+ *scts++ = bcdify(tm->tm_hour);
+ *scts++ = bcdify(tm->tm_min);
+ *scts++ = bcdify(tm->tm_sec);
+ *scts++ = bcdify(tm->tm_gmtoff/(60*15));
+}
+
+/* Decode 03.40 TP-SCTS (into utc/gmt timestamp) */
+static time_t gsm340_scts(u_int8_t *scts)
+{
+ struct tm tm;
+
+ u_int8_t yr = unbcdify(*scts++);
+
+ if (yr <= 80)
+ tm.tm_year = 100 + yr;
+ else
+ tm.tm_year = yr;
+ tm.tm_mon = unbcdify(*scts++) - 1;
+ tm.tm_mday = unbcdify(*scts++);
+ tm.tm_hour = unbcdify(*scts++);
+ tm.tm_min = unbcdify(*scts++);
+ tm.tm_sec = unbcdify(*scts++);
+ /* according to gsm 03.40 time zone is
+ "expressed in quarters of an hour" */
+ tm.tm_gmtoff = unbcdify(*scts++) * 15*60;
+
+ return mktime(&tm);
+}
+
+/* Return the default validity period in minutes */
+static unsigned long gsm340_vp_default(void)
+{
+ unsigned long minutes;
+ /* Default validity: two days */
+ minutes = 24 * 60 * 2;
+ return minutes;
+}
+
+/* Decode validity period format 'relative' */
+static unsigned long gsm340_vp_relative(u_int8_t *sms_vp)
+{
+ /* Chapter 9.2.3.12.1 */
+ u_int8_t vp;
+ unsigned long minutes;
+
+ vp = *(sms_vp);
+ if (vp <= 143)
+ minutes = vp + 1 * 5;
+ else if (vp <= 167)
+ minutes = 12*60 + (vp-143) * 30;
+ else if (vp <= 196)
+ minutes = vp-166 * 60 * 24;
+ else
+ minutes = vp-192 * 60 * 24 * 7;
+ return minutes;
+}
+
+/* Decode validity period format 'absolute' */
+static unsigned long gsm340_vp_absolute(u_int8_t *sms_vp)
+{
+ /* Chapter 9.2.3.12.2 */
+ time_t expires, now;
+ unsigned long minutes;
+
+ expires = gsm340_scts(sms_vp);
+ now = time(NULL);
+ if (expires <= now)
+ minutes = 0;
+ else
+ minutes = (expires-now)/60;
+ return minutes;
+}
+
+/* Decode validity period format 'relative in integer representation' */
+static unsigned long gsm340_vp_relative_integer(u_int8_t *sms_vp)
+{
+ u_int8_t vp;
+ unsigned long minutes;
+ vp = *(sms_vp);
+ if (vp == 0) {
+ LOGP(DSMS, LOGL_ERROR,
+ "reserved relative_integer validity period\n");
+ return gsm340_vp_default();
+ }
+ minutes = vp/60;
+ return minutes;
+}
+
+/* Decode validity period format 'relative in semi-octet representation' */
+static unsigned long gsm340_vp_relative_semioctet(u_int8_t *sms_vp)
+{
+ unsigned long minutes;
+ minutes = unbcdify(*sms_vp++)*60; /* hours */
+ minutes += unbcdify(*sms_vp++); /* minutes */
+ minutes += unbcdify(*sms_vp++)/60; /* seconds */
+ return minutes;
+}
+
+/* decode validity period. return minutes */
+static unsigned long gsm340_validity_period(u_int8_t sms_vpf, u_int8_t *sms_vp)
+{
+ u_int8_t fi; /* functionality indicator */
+
+ switch (sms_vpf) {
+ case GSM340_TP_VPF_RELATIVE:
+ return gsm340_vp_relative(sms_vp);
+ case GSM340_TP_VPF_ABSOLUTE:
+ return gsm340_vp_absolute(sms_vp);
+ case GSM340_TP_VPF_ENHANCED:
+ /* Chapter 9.2.3.12.3 */
+ fi = *sms_vp++;
+ /* ignore additional fi */
+ if (fi & (1<<7)) sms_vp++;
+ /* read validity period format */
+ switch (fi & 0x7) {
+ case 0x0:
+ return gsm340_vp_default(); /* no vpf specified */
+ case 0x1:
+ return gsm340_vp_relative(sms_vp);
+ case 0x2:
+ return gsm340_vp_relative_integer(sms_vp);
+ case 0x3:
+ return gsm340_vp_relative_semioctet(sms_vp);
+ default:
+ /* The GSM spec says that the SC should reject any
+ unsupported and/or undefined values. FIXME */
+ LOGP(DSMS, LOGL_ERROR,
+ "Reserved enhanced validity period format\n");
+ return gsm340_vp_default();
+ }
+ case GSM340_TP_VPF_NONE:
+ default:
+ return gsm340_vp_default();
+ }
+}
+
+/* determine coding alphabet dependent on GSM 03.38 Section 4 DCS */
+enum sms_alphabet gsm338_get_sms_alphabet(u_int8_t dcs)
+{
+ u_int8_t cgbits = dcs >> 4;
+ enum sms_alphabet alpha = DCS_NONE;
+
+ if ((cgbits & 0xc) == 0) {
+ if (cgbits & 2) {
+ LOGP(DSMS, LOGL_NOTICE,
+ "Compressed SMS not supported yet\n");
+ return 0xffffffff;
+ }
+
+ switch ((dcs >> 2)&0x03) {
+ case 0:
+ alpha = DCS_7BIT_DEFAULT;
+ break;
+ case 1:
+ alpha = DCS_8BIT_DATA;
+ break;
+ case 2:
+ alpha = DCS_UCS2;
+ break;
+ }
+ } else if (cgbits == 0xc || cgbits == 0xd)
+ alpha = DCS_7BIT_DEFAULT;
+ else if (cgbits == 0xe)
+ alpha = DCS_UCS2;
+ else if (cgbits == 0xf) {
+ if (dcs & 4)
+ alpha = DCS_8BIT_DATA;
+ else
+ alpha = DCS_7BIT_DEFAULT;
+ }
+
+ return alpha;
+}
+
+static int gsm340_rx_sms_submit(struct msgb *msg, struct gsm_sms *gsms)
+{
+ if (db_sms_store(gsms) != 0) {
+ LOGP(DSMS, 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(u_int8_t *oa, unsigned int oa_len,
+ struct gsm_subscriber *subscr)
+{
+ int len_in_bytes;
+
+ oa[1] = 0xb9; /* networks-specific number, private numbering plan */
+
+ len_in_bytes = gsm48_encode_bcd_number(oa, oa_len, 1, subscr->extension);
+
+ /* GSM 03.40 tells us the length is in 'useful semi-octets' */
+ oa[0] = strlen(subscr->extension) & 0xff;
+
+ return len_in_bytes;
+}
+
+/* generate a msgb containing a TPDU derived from struct gsm_sms,
+ * returns total size of TPDU */
+static int gsm340_gen_tpdu(struct msgb *msg, struct gsm_sms *sms)
+{
+ u_int8_t *smsp;
+ u_int8_t oa[12]; /* max len per 03.40 */
+ u_int8_t oa_len = 0;
+ u_int8_t octet_len;
+ unsigned int old_msg_len = msg->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(oa, sizeof(oa), sms->sender);
+ 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:
+ LOGP(DSMS, LOGL_NOTICE, "Unhandled Data Coding Scheme: 0x%02X\n",
+ sms->data_coding_scheme);
+ break;
+ }
+
+ return msg->len - old_msg_len;
+}
+
+/* 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_subscriber_connection *conn, struct msgb *msg)
+{
+ u_int8_t *smsp = msgb_sms(msg);
+ struct gsm_sms *gsms;
+ u_int8_t sms_mti, sms_mms, sms_vpf, sms_alphabet, sms_rp;
+ u_int8_t *sms_vp;
+ u_int8_t da_len_bytes;
+ u_int8_t address_lv[12]; /* according to 03.40 / 9.1.2.5 */
+ int rc = 0;
+
+ counter_inc(conn->bts->network->stats.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_mms = !!(*smsp & 0x04);
+ sms_vpf = (*smsp & 0x18) >> 3;
+ gsms->status_rep_req = (*smsp & 0x20);
+ gsms->ud_hdr_ind = (*smsp & 0x40);
+ sms_rp = (*smsp & 0x80);
+
+ smsp++;
+ gsms->msg_ref = *smsp++;
+
+ /* length in bytes of the destination address */
+ da_len_bytes = 2 + *smsp/2 + *smsp%2;
+ if (da_len_bytes > 12) {
+ LOGP(DSMS, LOGL_ERROR, "Destination Address > 12 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;
+ /* convert to real number */
+ gsm48_decode_bcd_number(gsms->dest_addr, sizeof(gsms->dest_addr), address_lv, 1);
+ 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) {
+ sms_free(gsms);
+ return GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER;
+ }
+
+ 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:
+ LOGP(DSMS, LOGL_NOTICE,
+ "SMS Validity period not implemented: 0x%02x\n", sms_vpf);
+ return GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER;
+ }
+ gsms->user_data_len = *smsp++;
+ if (gsms->user_data_len) {
+ memcpy(gsms->user_data, smsp, gsms->user_data_len);
+
+ switch (sms_alphabet) {
+ case DCS_7BIT_DEFAULT:
+ gsm_7bit_decode(gsms->text, smsp, gsms->user_data_len);
+ break;
+ case DCS_8BIT_DATA:
+ case DCS_UCS2:
+ case DCS_NONE:
+ break;
+ }
+ }
+
+ gsms->sender = subscr_get(conn->subscr);
+
+ LOGP(DSMS, LOGL_INFO, "RX SMS: Sender: %s, MTI: 0x%02x, VPF: 0x%02x, "
+ "MR: 0x%02x PID: 0x%02x, DCS: 0x%02x, DA: %s, "
+ "UserDataLength: 0x%02x, UserData: \"%s\"\n",
+ subscr_name(gsms->sender), sms_mti, sms_vpf, gsms->msg_ref,
+ gsms->protocol_id, gsms->data_coding_scheme, gsms->dest_addr,
+ gsms->user_data_len,
+ sms_alphabet == DCS_7BIT_DEFAULT ? gsms->text :
+ hexdump(gsms->user_data, gsms->user_data_len));
+
+ gsms->validity_minutes = gsm340_validity_period(sms_vpf, sms_vp);
+
+ /* FIXME: This looks very wrong */
+ send_signal(0, NULL, gsms, 0);
+
+ /* determine gsms->receiver based on dialled number */
+ gsms->receiver = subscr_get_by_extension(conn->bts->network, gsms->dest_addr);
+ if (!gsms->receiver) {
+ rc = 1; /* cause 1: unknown subscriber */
+ counter_inc(conn->bts->network->stats.sms.no_receiver);
+ goto out;
+ }
+
+ switch (sms_mti) {
+ case GSM340_SMS_SUBMIT_MS2SC:
+ /* MS is submitting a SMS */
+ rc = gsm340_rx_sms_submit(msg, gsms);
+ break;
+ case GSM340_SMS_COMMAND_MS2SC:
+ case GSM340_SMS_DELIVER_REP_MS2SC:
+ LOGP(DSMS, LOGL_NOTICE, "Unimplemented MTI 0x%02x\n", sms_mti);
+ rc = GSM411_RP_CAUSE_IE_NOTEXIST;
+ break;
+ default:
+ LOGP(DSMS, LOGL_NOTICE, "Undefined MTI 0x%02x\n", sms_mti);
+ rc = GSM411_RP_CAUSE_IE_NOTEXIST;
+ break;
+ }
+
+ if (!rc && !gsms->receiver)
+ rc = GSM411_RP_CAUSE_MO_NUM_UNASSIGNED;
+
+out:
+ sms_free(gsms);
+
+ return rc;
+}
+
+static int gsm411_send_rp_ack(struct gsm_trans *trans, u_int8_t msg_ref)
+{
+ struct msgb *msg = gsm411_msgb_alloc();
+
+ DEBUGP(DSMS, "TX: SMS RP ACK\n");
+
+ return gsm411_rp_sendmsg(msg, trans, GSM411_MT_RP_ACK_MT, msg_ref);
+}
+
+static int gsm411_send_rp_error(struct gsm_trans *trans,
+ u_int8_t msg_ref, u_int8_t cause)
+{
+ struct msgb *msg = gsm411_msgb_alloc();
+
+ msgb_tv_put(msg, 1, cause);
+
+ LOGP(DSMS, LOGL_NOTICE, "TX: SMS RP ERROR, cause %d (%s)\n", cause,
+ get_value_string(rp_cause_strs, cause));
+
+ return gsm411_rp_sendmsg(msg, trans, GSM411_MT_RP_ERROR_MT, msg_ref);
+}
+
+/* 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,
+ u_int8_t src_len, u_int8_t *src,
+ u_int8_t dst_len, u_int8_t *dst,
+ u_int8_t tpdu_len, u_int8_t *tpdu)
+{
+ int rc = 0;
+
+ if (src_len && src)
+ LOGP(DSMS, LOGL_ERROR, "RP-DATA (MO) with SRC ?!?\n");
+
+ if (!dst_len || !dst || !tpdu_len || !tpdu) {
+ LOGP(DSMS, 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 = tpdu;
+
+ DEBUGP(DSMS, "DST(%u,%s)\n", dst_len, hexdump(dst, dst_len));
+
+ rc = gsm340_rx_tpdu(trans->conn, msg);
+ 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
+ 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)
+{
+ u_int8_t src_len, dst_len, rpud_len;
+ u_int8_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];
+
+ DEBUGP(DSMS, "RX_RP-DATA: src_len=%u, dst_len=%u ud_len=%u\n",
+ src_len, dst_len, rpud_len);
+ return gsm411_rx_rp_ud(msg, trans, rph, src_len, src, dst_len, dst,
+ rpud_len, rp_ud);
+}
+
+/* Receive a 04.11 RP-ACK message (response to RP-DATA from us) */
+static int gsm411_rx_rp_ack(struct msgb *msg, 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->sms.is_mt) {
+ LOGP(DSMS, LOGL_ERROR, "RX RP-ACK on a MO transfer ?\n");
+ return gsm411_send_rp_error(trans, rph->msg_ref,
+ GSM411_RP_CAUSE_MSG_INCOMP_STATE);
+ }
+
+ if (!sms) {
+ LOGP(DSMS, 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_sent(sms);
+
+ send_signal(S_SMS_DELIVERED, trans, sms, 0);
+
+ sms_free(sms);
+ trans->sms.sms = NULL;
+
+ /* check for more messages for this subscriber */
+ sms = db_sms_get_unsent_for_subscr(trans->subscr);
+ if (sms)
+ gsm411_send_sms(trans->conn, sms);
+ else
+ gsm411_release_conn(trans->conn);
+
+ /* free the transaction here */
+ trans_free(trans);
+ return 0;
+}
+
+static int gsm411_rx_rp_error(struct msgb *msg, struct gsm_trans *trans,
+ struct gsm411_rp_hdr *rph)
+{
+ struct gsm_network *net = trans->conn->bts->network;
+ struct gsm_sms *sms = trans->sms.sms;
+ u_int8_t cause_len = rph->data[0];
+ u_int8_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 */
+
+ LOGP(DSMS, LOGL_NOTICE, "%s: RX SMS RP-ERROR, cause %d:%d (%s)\n",
+ subscr_name(trans->conn->subscr), cause_len, cause,
+ get_value_string(rp_cause_strs, cause));
+
+ if (!trans->sms.is_mt) {
+ LOGP(DSMS, LOGL_ERROR, "RX RP-ERR on a MO transfer ?\n");
+#if 0
+ return gsm411_send_rp_error(trans, rph->msg_ref,
+ GSM411_RP_CAUSE_MSG_INCOMP_STATE);
+#endif
+ }
+
+ if (!sms) {
+ LOGP(DSMS, 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);
+ counter_inc(net->stats.sms.rp_err_mem);
+ } else {
+ send_signal(S_SMS_UNKNOWN_ERROR, trans, sms, 0);
+ counter_inc(net->stats.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)
+{
+ struct gsm_sms *sms;
+ int rc;
+
+ rc = gsm411_send_rp_ack(trans, rph->msg_ref);
+ trans->sms.rp_state = GSM411_RPS_IDLE;
+
+ /* 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);
+
+ /* check for more messages for this subscriber */
+ sms = db_sms_get_unsent_for_subscr(trans->subscr);
+ if (sms)
+ gsm411_send_sms(trans->conn, sms);
+ else
+ gsm411_release_conn(trans->conn);
+
+ return rc;
+}
+
+static int gsm411_rx_cp_data(struct msgb *msg, struct gsm48_hdr *gh,
+ struct gsm_trans *trans)
+{
+ struct gsm411_rp_hdr *rp_data = (struct gsm411_rp_hdr*)&gh->data;
+ u_int8_t msg_type = rp_data->msg_type & 0x07;
+ int rc = 0;
+
+ switch (msg_type) {
+ case GSM411_MT_RP_DATA_MO:
+ DEBUGP(DSMS, "RX SMS RP-DATA (MO)\n");
+ /* start TR2N and enter 'wait to send RP-ACK state' */
+ trans->sms.rp_state = GSM411_RPS_WAIT_TO_TX_RP_ACK;
+ rc = gsm411_rx_rp_data(msg, trans, rp_data);
+ break;
+ case GSM411_MT_RP_ACK_MO:
+ DEBUGP(DSMS,"RX SMS RP-ACK (MO)\n");
+ rc = gsm411_rx_rp_ack(msg, trans, rp_data);
+ break;
+ case GSM411_MT_RP_SMMA_MO:
+ DEBUGP(DSMS, "RX SMS RP-SMMA\n");
+ /* start TR2N and enter 'wait to send RP-ACK state' */
+ trans->sms.rp_state = GSM411_RPS_WAIT_TO_TX_RP_ACK;
+ rc = gsm411_rx_rp_smma(msg, trans, rp_data);
+ break;
+ case GSM411_MT_RP_ERROR_MO:
+ rc = gsm411_rx_rp_error(msg, trans, rp_data);
+ break;
+ default:
+ LOGP(DSMS, LOGL_NOTICE, "Invalid RP type 0x%02x\n", msg_type);
+ rc = gsm411_send_rp_error(trans, rp_data->msg_ref,
+ GSM411_RP_CAUSE_MSGTYPE_NOTEXIST);
+ break;
+ }
+
+ return rc;
+}
+
+/* send CP-ACK to given transaction */
+static int gsm411_tx_cp_ack(struct gsm_trans *trans)
+{
+ struct msgb *msg = gsm411_msgb_alloc();
+ int rc;
+
+ rc = gsm411_cp_sendmsg(msg, trans, GSM411_MT_CP_ACK);
+
+ if (trans->sms.is_mt) {
+ /* If this is a MT SMS DELIVER, we can clear transaction here */
+ trans->sms.cp_state = GSM411_CPS_IDLE;
+ //trans_free(trans);
+ }
+
+ return rc;
+}
+
+static int gsm411_tx_cp_error(struct gsm_trans *trans, u_int8_t cause)
+{
+ struct msgb *msg = gsm411_msgb_alloc();
+ u_int8_t *causep;
+
+ LOGP(DSMS, LOGL_NOTICE, "TX CP-ERROR, cause %d (%s)\n", cause,
+ get_value_string(cp_cause_strs, cause));
+
+ causep = msgb_put(msg, 1);
+ *causep = cause;
+
+ return gsm411_cp_sendmsg(msg, trans, GSM411_MT_CP_ERROR);
+}
+
+/* Entry point for incoming GSM48_PDISC_SMS from abis_rsl.c */
+int gsm0411_rcv_sms(struct gsm_subscriber_connection *conn,
+ struct msgb *msg)
+{
+ struct gsm48_hdr *gh = msgb_l3(msg);
+ u_int8_t msg_type = gh->msg_type;
+ u_int8_t transaction_id = ((gh->proto_discr >> 4) ^ 0x8); /* flip */
+ struct gsm_trans *trans;
+ int rc = 0;
+
+ if (!conn->subscr)
+ return -EIO;
+ /* FIXME: send some error message */
+
+ DEBUGP(DSMS, "trans_id=%x ", transaction_id);
+ trans = trans_find_by_id(conn->subscr, GSM48_PDISC_SMS,
+ transaction_id);
+ if (!trans) {
+ DEBUGPC(DSMS, "(new) ");
+ trans = trans_alloc(conn->subscr, GSM48_PDISC_SMS,
+ transaction_id, new_callref++);
+ if (!trans) {
+ DEBUGPC(DSMS, "No memory for trans\n");
+ /* FIXME: send some error message */
+ return -ENOMEM;
+ }
+ trans->sms.cp_state = GSM411_CPS_IDLE;
+ trans->sms.rp_state = GSM411_RPS_IDLE;
+ trans->sms.is_mt = 0;
+ trans->sms.link_id = UM_SAPI_SMS;
+
+ trans->conn = conn;
+ }
+
+ switch(msg_type) {
+ case GSM411_MT_CP_DATA:
+ DEBUGPC(DSMS, "RX SMS CP-DATA\n");
+
+ /* 5.4: For MO, if a CP-DATA is received for a new
+ * transaction, equals reception of an implicit
+ * last CP-ACK for previous transaction */
+ if (trans->sms.cp_state == GSM411_CPS_IDLE) {
+ 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(conn->subscr,
+ GSM48_PDISC_SMS, i);
+ if (!ptrans)
+ continue;
+
+ DEBUGP(DSMS, "Implicit CP-ACK for trans_id=%x\n", i);
+
+ /* Finish it for good */
+ bsc_del_timer(&ptrans->sms.cp_timer);
+ ptrans->sms.cp_state = GSM411_CPS_IDLE;
+ trans_free(ptrans);
+ }
+ }
+
+ /* 5.2.3.1.3: MO state exists when SMC has received
+ * CP-DATA, including sending of the assoc. CP-ACK */
+ /* 5.2.3.2.4: MT state exists when SMC has received
+ * CP-DATA, including sending of the assoc. CP-ACK */
+ trans->sms.cp_state = GSM411_CPS_MM_ESTABLISHED;
+
+ /* SMC instance acknowledges the CP-DATA frame */
+ gsm411_tx_cp_ack(trans);
+
+ rc = gsm411_rx_cp_data(msg, gh, trans);
+#if 0
+ /* Send CP-ACK or CP-ERORR in response */
+ if (rc < 0) {
+ rc = gsm411_tx_cp_error(trans, GSM411_CP_CAUSE_NET_FAIL);
+ } else
+ rc = gsm411_tx_cp_ack(trans);
+#endif
+ break;
+ case GSM411_MT_CP_ACK:
+ /* previous CP-DATA in this transaction was confirmed */
+ DEBUGPC(DSMS, "RX SMS CP-ACK\n");
+ /* 5.2.3.1.3: MO state exists when SMC has received CP-ACK */
+ /* 5.2.3.2.4: MT state exists when SMC has received CP-ACK */
+ trans->sms.cp_state = GSM411_CPS_MM_ESTABLISHED;
+ /* Stop TC1* after CP-ACK has been received */
+ bsc_del_timer(&trans->sms.cp_timer);
+
+ if (!trans->sms.is_mt) {
+ /* FIXME: we have sent one CP-DATA, which was now
+ * acknowledged. Check if we want to transfer more,
+ * i.e. multi-part message */
+ trans->sms.cp_state = GSM411_CPS_IDLE;
+ trans_free(trans);
+ }
+ break;
+ case GSM411_MT_CP_ERROR:
+ DEBUGPC(DSMS, "RX SMS CP-ERROR, cause %d (%s)\n", gh->data[0],
+ get_value_string(cp_cause_strs, gh->data[0]));
+ bsc_del_timer(&trans->sms.cp_timer);
+ trans->sms.cp_state = GSM411_CPS_IDLE;
+ trans_free(trans);
+ break;
+ default:
+ DEBUGPC(DSMS, "RX Unimplemented CP msg_type: 0x%02x\n", msg_type);
+ rc = gsm411_tx_cp_error(trans, GSM411_CP_CAUSE_MSGTYPE_NOTEXIST);
+ trans->sms.cp_state = GSM411_CPS_IDLE;
+ trans_free(trans);
+ break;
+ }
+
+ return rc;
+}
+
+/* Take a SMS in gsm_sms structure and send it through an already
+ * existing lchan. We also assume that the caller ensured this lchan already
+ * has a SAPI3 RLL connection! */
+int gsm411_send_sms(struct gsm_subscriber_connection *conn, struct gsm_sms *sms)
+{
+ struct msgb *msg = gsm411_msgb_alloc();
+ struct gsm_trans *trans;
+ u_int8_t *data, *rp_ud_len;
+ u_int8_t msg_ref = 42;
+ int transaction_id;
+ int rc;
+
+ transaction_id = trans_assign_trans_id(conn->subscr, GSM48_PDISC_SMS, 0);
+ if (transaction_id == -1) {
+ LOGP(DSMS, LOGL_ERROR, "No available transaction ids\n");
+ send_signal(S_SMS_UNKNOWN_ERROR, NULL, sms, 0);
+ sms_free(sms);
+ return -EBUSY;
+ }
+
+ DEBUGP(DSMS, "send_sms_lchan()\n");
+
+ /* FIXME: allocate transaction with message reference */
+ trans = trans_alloc(conn->subscr, GSM48_PDISC_SMS,
+ transaction_id, new_callref++);
+ if (!trans) {
+ LOGP(DSMS, LOGL_ERROR, "No memory for trans\n");
+ send_signal(S_SMS_UNKNOWN_ERROR, NULL, sms, 0);
+ sms_free(sms);
+ /* FIXME: send some error message */
+ return -ENOMEM;
+ }
+ trans->sms.cp_state = GSM411_CPS_IDLE;
+ trans->sms.rp_state = GSM411_RPS_IDLE;
+ trans->sms.is_mt = 1;
+ trans->sms.sms = sms;
+ trans->sms.link_id = UM_SAPI_SMS; /* FIXME: main or SACCH ? */
+
+ trans->conn = conn;
+
+ /* Hardcode SMSC Originating Address for now */
+ data = (u_int8_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 = (u_int8_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 = (u_int8_t *)msgb_put(msg, 1);
+
+ /* generate the 03.40 TPDU */
+ rc = gsm340_gen_tpdu(msg, sms);
+ if (rc < 0) {
+ send_signal(S_SMS_UNKNOWN_ERROR, trans, sms, 0);
+ trans_free(trans);
+ sms_free(sms);
+ msgb_free(msg);
+ return rc;
+ }
+
+ *rp_ud_len = rc;
+
+ DEBUGP(DSMS, "TX: SMS DELIVER\n");
+
+ counter_inc(conn->bts->network->stats.sms.delivered);
+ db_sms_inc_deliver_attempts(trans->sms.sms);
+
+ return gsm411_rp_sendmsg(msg, trans, GSM411_MT_RP_DATA_MT, msg_ref);
+ /* FIXME: enter 'wait for RP-ACK' state, start TR1N */
+}
+
+/* paging callback. Here we get called if paging a subscriber has
+ * succeeded or failed. */
+static int paging_cb_send_sms(unsigned int hooknum, unsigned int event,
+ struct msgb *msg, void *_conn, void *_sms)
+{
+ struct gsm_subscriber_connection *conn = _conn;
+ struct gsm_sms *sms = _sms;
+ int rc = 0;
+
+ DEBUGP(DSMS, "paging_cb_send_sms(hooknum=%u, event=%u, msg=%p,"
+ "conn=%p, sms=%p/id: %llu)\n", hooknum, event, msg, conn, sms, sms->id);
+
+ if (hooknum != GSM_HOOK_RR_PAGING)
+ return -EINVAL;
+
+ switch (event) {
+ case GSM_PAGING_SUCCEEDED:
+ gsm411_send_sms(conn, sms);
+ break;
+ case GSM_PAGING_EXPIRED:
+ case GSM_PAGING_OOM:
+ case GSM_PAGING_BUSY:
+ send_signal(S_SMS_UNKNOWN_ERROR, NULL, sms, event);
+ sms_free(sms);
+ rc = -ETIMEDOUT;
+ break;
+ default:
+ LOGP(DSMS, LOGL_ERROR, "Unhandled paging event: %d\n", event);
+ }
+
+ return rc;
+}
+
+/* high-level function to send a SMS to a given subscriber. The function
+ * will take care of paging the subscriber, establishing the RLL SAPI3
+ * connection, etc. */
+int gsm411_send_sms_subscr(struct gsm_subscriber *subscr,
+ struct gsm_sms *sms)
+{
+ struct gsm_subscriber_connection *conn;
+
+ /* check if we already have an open lchan to the subscriber.
+ * if yes, send the SMS this way */
+ conn = connection_for_subscr(subscr);
+ if (conn) {
+ return gsm411_send_sms(conn, sms);
+ }
+
+ /* if not, we have to start paging */
+ subscr_get_channel(subscr, RSL_CHANNEED_SDCCH, paging_cb_send_sms, sms);
+ return 0;
+}
+
+void _gsm411_sms_trans_free(struct gsm_trans *trans)
+{
+ if (trans->sms.sms) {
+ LOGP(DSMS, LOGL_ERROR, "Transaction contains SMS.\n");
+ send_signal(S_SMS_UNKNOWN_ERROR, trans, trans->sms.sms, 0);
+ sms_free(trans->sms.sms);
+ trans->sms.sms = NULL;
+ }
+
+ bsc_del_timer(&trans->sms.cp_timer);
+}
+
+void gsm411_sapi_n_reject(struct gsm_subscriber_connection *conn)
+{
+ struct gsm_subscriber *subscr;
+ struct gsm_network *net;
+ struct gsm_trans *trans, *tmp;
+
+ subscr = subscr_get(conn->subscr);
+ net = conn->bts->network;
+
+ llist_for_each_entry_safe(trans, tmp, &net->trans_list, entry)
+ if (trans->conn == conn) {
+ struct gsm_sms *sms = trans->sms.sms;
+ if (!sms) {
+ LOGP(DSMS, 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);
+ }
+
+ subscr_put_channel(subscr);
+ subscr_put(subscr);
+}
+