| /* 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> |
| * |
| * 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, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <netinet/in.h> |
| |
| #include <openbsc/msgb.h> |
| #include <openbsc/tlv.h> |
| #include <openbsc/debug.h> |
| #include <openbsc/gsm_data.h> |
| #include <openbsc/gsm_subscriber.h> |
| #include <openbsc/gsm_04_11.h> |
| #include <openbsc/gsm_04_08.h> |
| #include <openbsc/gsm_utils.h> |
| #include <openbsc/abis_rsl.h> |
| #include <openbsc/signal.h> |
| #include <openbsc/db.h> |
| #include <openbsc/talloc.h> |
| |
| #define GSM411_ALLOC_SIZE 1024 |
| #define GSM411_ALLOC_HEADROOM 128 |
| |
| static void *tall_sms_ctx; |
| static void *tall_gsms_ctx; |
| |
| struct msgb *gsm411_msgb_alloc(void) |
| { |
| return msgb_alloc_headroom(GSM411_ALLOC_SIZE, GSM411_ALLOC_HEADROOM, |
| "GSM 04.11"); |
| } |
| |
| int gsm0411_sendmsg(struct msgb *msg) |
| { |
| if (msg->lchan) |
| msg->trx = msg->lchan->ts->trx; |
| |
| msg->l3h = msg->data; |
| |
| return rsl_data_request(msg, 0); |
| } |
| |
| |
| #if 0 |
| static u_int8_t gsm0411_tpdu_from_sms(u_int8_t *tpdu, struct sms_deliver *sms) |
| { |
| } |
| #endif |
| |
| static unsigned long gsm340_validity_period(struct sms_submit *sms) |
| { |
| u_int8_t vp; |
| unsigned long minutes; |
| |
| switch (sms->vpf) { |
| case GSM340_TP_VPF_RELATIVE: |
| /* Chapter 9.2.3.12.1 */ |
| 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; |
| break; |
| case GSM340_TP_VPF_ABSOLUTE: |
| /* Chapter 9.2.3.12.2 */ |
| /* FIXME: like service center time stamp */ |
| DEBUGP(DSMS, "VPI absolute not implemented yet\n"); |
| break; |
| case GSM340_TP_VPF_ENHANCED: |
| /* Chapter 9.2.3.12.3 */ |
| /* FIXME: implementation */ |
| DEBUGP(DSMS, "VPI enhanced not implemented yet\n"); |
| break; |
| } |
| return minutes; |
| } |
| |
| /* 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) |
| DEBUGP(DSMS, "Compressed SMS not supported yet\n"); |
| |
| switch (dcs & 3) { |
| 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 sms_submit *sms, |
| struct gsm_sms *gsms) |
| { |
| if (db_sms_store(gsms) != 0) { |
| DEBUGP(DSMS, "Failed to store SMS in Database\n"); |
| talloc_free(sms); |
| talloc_free(gsms); |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| /* process an incoming TPDU (called from RP-DATA) */ |
| static int gsm340_rx_tpdu(struct msgb *msg) |
| { |
| u_int8_t *smsp = msgb_sms(msg); |
| struct sms_submit *sms; |
| struct gsm_sms *gsms; |
| u_int8_t da_len_bytes; |
| u_int8_t address_lv[12]; /* according to 03.40 / 9.1.2.5 */ |
| int rc = 0; |
| |
| if (!tall_sms_ctx) |
| tall_sms_ctx = talloc_named_const(tall_bsc_ctx, 1, |
| "sms_submit"); |
| |
| sms = talloc(tall_sms_ctx, struct sms_submit); |
| if (!sms) |
| return -ENOMEM; |
| memset(sms, 0, sizeof(*sms)); |
| |
| if (!tall_gsms_ctx) |
| tall_gsms_ctx = talloc_named_const(tall_bsc_ctx, 1, |
| "sms"); |
| |
| gsms = talloc(tall_gsms_ctx, struct gsm_sms); |
| if (!gsms) { |
| talloc_free(sms); |
| return -ENOMEM; |
| } |
| memset(gsms, 0, sizeof(*gsms)); |
| |
| /* invert those fields where 0 means active/present */ |
| sms->mti = *smsp & 0x03; |
| sms->mms = !!(*smsp & 0x04); |
| sms->vpf = (*smsp & 0x18) >> 3; |
| sms->sri = !!(*smsp & 0x20); |
| sms->udhi= !!(*smsp & 0x40); |
| sms->rp = !!(*smsp & 0x80); |
| |
| smsp++; |
| sms->msg_ref = *smsp++; |
| |
| /* length in bytes of the destination address */ |
| da_len_bytes = 2 + *smsp/2 + *smsp%2; |
| if (da_len_bytes > 12) { |
| DEBUGP(DSMS, "Destination Address > 12 bytes ?!?\n"); |
| rc = -EIO; |
| 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 */ |
| decode_bcd_number(sms->dest_addr, sizeof(sms->dest_addr), address_lv, 1); |
| |
| smsp += da_len_bytes; |
| |
| sms->pid = *smsp++; |
| |
| sms->dcs = *smsp++; |
| sms->alphabet = gsm338_get_sms_alphabet(sms->dcs); |
| |
| 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; |
| smsp += 7; |
| break; |
| default: |
| DEBUGP(DSMS, "SMS Validity period not implemented: 0x%02x\n", |
| sms->vpf); |
| } |
| sms->ud_len = *smsp++; |
| if (sms->ud_len) |
| sms->user_data = smsp; |
| else |
| sms->user_data = NULL; |
| |
| if (sms->ud_len) { |
| switch (sms->alphabet) { |
| case DCS_7BIT_DEFAULT: |
| gsm_7bit_decode(sms->decoded, smsp, sms->ud_len); |
| break; |
| case DCS_8BIT_DATA: |
| case DCS_UCS2: |
| case DCS_NONE: |
| memcpy(sms->decoded, sms->user_data, sms->ud_len); |
| break; |
| } |
| } |
| |
| DEBUGP(DSMS, "SMS:\nMTI: 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, sms->msg_ref, |
| sms->pid, sms->dcs, sms->dest_addr, sms->ud_len, |
| sms->alphabet == DCS_7BIT_DEFAULT ? sms->decoded : hexdump(sms->user_data, sms->ud_len)); |
| |
| dispatch_signal(SS_SMS, 0, sms); |
| |
| gsms->sender = msg->lchan->subscr; |
| /* FIXME: sender refcount */ |
| |
| /* determine gsms->receiver based on dialled number */ |
| gsms->receiver = subscr_get_by_extension(sms->dest_addr); |
| if (!gsms->receiver) { |
| rc = 1; /* cause 1: unknown subscriber */ |
| goto out; |
| } |
| |
| if (sms->user_data) |
| strncpy(gsms->text, sms->decoded, sizeof(gsms->text)); |
| |
| switch (sms->mti) { |
| case GSM340_SMS_SUBMIT_MS2SC: |
| /* MS is submitting a SMS */ |
| rc = gsm340_rx_sms_submit(msg, sms, gsms); |
| break; |
| case GSM340_SMS_COMMAND_MS2SC: |
| case GSM340_SMS_DELIVER_REP_MS2SC: |
| DEBUGP(DSMS, "Unimplemented MTI 0x%02x\n", sms->mti); |
| break; |
| default: |
| DEBUGP(DSMS, "Undefined MTI 0x%02x\n", sms->mti); |
| break; |
| } |
| |
| out: |
| talloc_free(gsms); |
| talloc_free(sms); |
| |
| return rc; |
| } |
| |
| static int gsm411_send_rp_ack(struct gsm_lchan *lchan, u_int8_t trans_id, |
| u_int8_t msg_ref) |
| { |
| struct msgb *msg = gsm411_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| struct gsm411_rp_hdr *rp; |
| |
| msg->lchan = lchan; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| // Outgoing needs the highest bit set |
| gh->proto_discr = GSM48_PDISC_SMS | trans_id<<4 | 0x80; |
| gh->msg_type = GSM411_MT_CP_DATA; |
| |
| rp = (struct gsm411_rp_hdr *)msgb_put(msg, sizeof(*rp)); |
| rp->len = 2; |
| rp->msg_type = GSM411_MT_RP_ACK_MT; |
| rp->msg_ref = msg_ref; |
| |
| DEBUGP(DSMS, "TX: SMS RP ACK\n"); |
| |
| return gsm0411_sendmsg(msg); |
| } |
| |
| static int gsm411_send_rp_error(struct gsm_lchan *lchan, u_int8_t trans_id, |
| u_int8_t msg_ref, u_int8_t cause) |
| { |
| struct msgb *msg = gsm411_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| struct gsm411_rp_hdr *rp; |
| |
| msg->lchan = lchan; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| // Outgoing needs the highest bit set |
| gh->proto_discr = GSM48_PDISC_SMS | trans_id<<4 | 0x80; |
| gh->msg_type = GSM411_MT_CP_DATA; |
| |
| rp = (struct gsm411_rp_hdr *)msgb_put(msg, sizeof(*rp)); |
| rp->msg_type = GSM411_MT_RP_ERROR_MT; |
| rp->msg_ref = msg_ref; |
| msgb_tv_put(msg, 1, cause); |
| |
| DEBUGP(DSMS, "TX: SMS RP ERROR (cause %02d)\n", cause); |
| |
| return gsm0411_sendmsg(msg); |
| } |
| |
| /* Receive a 04.11 TPDU inside RP-DATA / user data */ |
| static int gsm411_rx_rp_ud(struct msgb *msg, 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) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| u_int8_t trans_id = gh->proto_discr >> 4; |
| int rc = 0; |
| |
| if (src_len && src) |
| DEBUGP(DSMS, "RP-DATA (MO) with SRC ?!?\n"); |
| |
| if (!dst_len || !dst || !tpdu_len || !tpdu) { |
| DEBUGP(DSMS, "RP-DATA (MO) without DST or TPDU ?!?\n"); |
| return -EIO; |
| } |
| msg->smsh = tpdu; |
| |
| DEBUGP(DSMS, "DST(%u,%s)\n", dst_len, hexdump(dst, dst_len)); |
| //return gsm411_send_rp_error(msg->lchan, trans_id, rph->msg_ref, rc); |
| |
| rc = gsm340_rx_tpdu(msg); |
| if (rc == 0) |
| return gsm411_send_rp_ack(msg->lchan, trans_id, rph->msg_ref); |
| else if (rc > 0) |
| return gsm411_send_rp_error(msg->lchan, trans_id, 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 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, rph, src_len, src, dst_len, dst, |
| rpud_len, rp_ud); |
| } |
| |
| static int gsm411_rx_cp_data(struct msgb *msg, struct gsm48_hdr *gh) |
| { |
| 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, "SMS RP-DATA (MO)\n"); |
| rc = gsm411_rx_rp_data(msg, rp_data); |
| break; |
| case GSM411_MT_RP_ACK_MO: |
| /* Acnkowledgement to MT RP_DATA */ |
| case GSM411_MT_RP_ERROR_MO: |
| /* Error in response to MT RP_DATA */ |
| case GSM411_MT_RP_SMMA_MO: |
| /* 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 */ |
| DEBUGP(DSMS, "Unimplemented RP type 0x%02x\n", msg_type); |
| break; |
| default: |
| DEBUGP(DSMS, "Invalid RP type 0x%02x\n", msg_type); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| int gsm0411_rcv_sms(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| u_int8_t msg_type = gh->msg_type; |
| int rc = 0; |
| |
| switch(msg_type) { |
| case GSM411_MT_CP_DATA: |
| DEBUGP(DSMS, "SMS CP-DATA\n"); |
| rc = gsm411_rx_cp_data(msg, gh); |
| break; |
| case GSM411_MT_CP_ACK: |
| DEBUGP(DSMS, "SMS CP-ACK\n"); |
| break; |
| case GSM411_MT_CP_ERROR: |
| DEBUGP(DSMS, "SMS CP-ERROR, cause 0x%02x\n", gh->data[0]); |
| break; |
| default: |
| DEBUGP(DSMS, "Unimplemented CP msg_type: 0x%02x\n", msg_type); |
| break; |
| } |
| |
| |
| return rc; |
| } |
| |
| /* Test TPDU - 25c3 welcome */ |
| #if 0 |
| static u_int8_t tpdu_test[] = { |
| 0x04, 0x04, 0x81, 0x32, 0x24, 0x00, 0x00, 0x80, 0x21, 0x92, 0x90, 0x32, |
| 0x24, 0x40, 0x4D, 0xB2, 0xDA, 0x70, 0xD6, 0x9A, 0x97, 0xE5, 0xF6, 0xF4, |
| 0xB8, 0x0C, 0x0A, 0xBB, 0xDD, 0xEF, 0xBA, 0x7B, 0x5C, 0x6E, 0x97, 0xDD, |
| 0x74, 0x1D, 0x08, 0xCA, 0x2E, 0x87, 0xE7, 0x65, 0x50, 0x98, 0x4E, 0x2F, |
| 0xBB, 0xC9, 0x20, 0x3A, 0xBA, 0x0C, 0x3A, 0x4E, 0x9B, 0x20, 0x7A, 0x98, |
| 0xBD, 0x06, 0x85, 0xE9, 0xA0, 0x58, 0x4C, 0x37, 0x83, 0x81, 0xD2, 0x6E, |
| 0xD0, 0x34, 0x1C, 0x66, 0x83, 0x62, 0x21, 0x90, 0xAE, 0x95, 0x02 |
| }; |
| #else |
| /* Test TPDU - ALL YOUR */ |
| static u_int8_t tpdu_test[] = { |
| 0x04, 0x04, 0x81, 0x32, 0x24, 0x00, 0x00, 0x80, 0x21, 0x03, 0x41, 0x24, |
| 0x32, 0x40, 0x1F, 0x41, 0x26, 0x13, 0x94, 0x7D, 0x56, 0xA5, 0x20, 0x28, |
| 0xF2, 0xE9, 0x2C, 0x82, 0x82, 0xD2, 0x22, 0x48, 0x58, 0x64, 0x3E, 0x9D, |
| 0x47, 0x10, 0xF5, 0x09, 0xAA, 0x4E, 0x01 |
| }; |
| #endif |
| |
| int gsm0411_send_sms(struct gsm_lchan *lchan, struct sms_deliver *sms) |
| { |
| struct msgb *msg = gsm411_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| struct gsm411_rp_hdr *rp; |
| u_int8_t *data; |
| |
| msg->lchan = lchan; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| gh->proto_discr = GSM48_PDISC_SMS; |
| gh->msg_type = GSM411_MT_CP_DATA; |
| |
| rp = (struct gsm411_rp_hdr *)msgb_put(msg, sizeof(*rp)); |
| rp->len = sizeof(tpdu_test) + 10; |
| rp->msg_type = GSM411_MT_RP_DATA_MT; |
| rp->msg_ref = 42; /* FIXME: Choose randomly */ |
| /* Hardcode OA for now */ |
| data = (u_int8_t *)msgb_put(msg, 8); |
| data[0] = 0x07; |
| data[1] = 0x91; |
| data[2] = 0x44; |
| data[3] = 0x77; |
| data[4] = 0x58; |
| data[5] = 0x10; |
| data[6] = 0x06; |
| data[7] = 0x50; |
| data = (u_int8_t *)msgb_put(msg, 1); |
| data[0] = 0; |
| |
| /* FIXME: Hardcoded for now */ |
| //smslen = gsm0411_tpdu_from_sms(tpdu, sms); |
| |
| /* RPDU length */ |
| data = (u_int8_t *)msgb_put(msg, 1); |
| data[0] = sizeof(tpdu_test); |
| |
| data = (u_int8_t *)msgb_put(msg, sizeof(tpdu_test)); |
| |
| //memcpy(data, tpdu, smslen); |
| memcpy(data, tpdu_test, sizeof(tpdu_test)); |
| |
| DEBUGP(DSMS, "TX: SMS SUBMIT\n"); |
| |
| return gsm0411_sendmsg(msg); |
| } |