cdma-sms: Add CDMA SMS Support

1 files changed, 735 insertions, 0 deletions

diff --git a/src/cdma-smsutil.c b/src/cdma-smsutil.c
new file mode 100644
index 00000000..283e1ed2
--- /dev/null
+++ b/src/cdma-smsutil.c
@@ -0,0 +1,735 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2010-2011  Nokia Corporation. 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 version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  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 St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define _GNU_SOURCE
+#include <string.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <glib.h>
+
+#include "cdma-smsutil.h"
+
+#define uninitialized_var(x) x = x
+
+enum cdma_sms_rec_flag {
+	CDMA_SMS_REC_FLAG_MANDATORY =	1,
+};
+
+typedef gboolean (*rec_handler)(const guint8 *, guint8, void *);
+
+struct simple_iter {
+	guint8 max;
+	const guint8 *pdu;
+	guint8 pos;
+	guint8 id;
+	guint8 len;
+	const guint8 *data;
+};
+
+static void simple_iter_init(struct simple_iter *iter,
+				const guint8 *pdu, guint8 len)
+{
+	iter->pdu = pdu;
+	iter->max = len;
+	iter->pos = 0;
+	iter->id = 0;
+	iter->len = 0;
+	iter->data = NULL;
+}
+
+static gboolean simple_iter_next(struct simple_iter *iter)
+{
+	const guint8 *pdu = iter->pdu + iter->pos;
+	const guint8 *end = iter->pdu + iter->max;
+	guint8 id;
+	guint8 len;
+
+	if (pdu == end)
+		return FALSE;
+
+	id = *pdu;
+	pdu++;
+
+	if (pdu == end)
+		return FALSE;
+
+	len = *pdu++;
+
+	if (pdu + len > end)
+		return FALSE;
+
+	iter->id = id;
+	iter->len = len;
+	iter->data = pdu;
+
+	iter->pos = pdu + len - iter->pdu;
+
+	return TRUE;
+}
+
+static guint8 simple_iter_get_id(struct simple_iter *iter)
+{
+	return iter->id;
+}
+
+static guint8 simple_iter_get_length(struct simple_iter *iter)
+{
+	return iter->len;
+}
+
+static const guint8 *simple_iter_get_data(struct simple_iter *iter)
+{
+	return iter->data;
+}
+
+static inline void set_bitmap(guint32 *bitmap, guint8 pos)
+{
+	*bitmap = *bitmap | (1 << pos);
+}
+
+/* Unpacks the byte stream. The field has to be <= 8 bits. */
+static guint8 bit_field_unpack(const guint8 *buf, guint16 offset, guint8 nbit)
+{
+	guint8 bit_pos;
+	guint8 val = 0;
+	const guint8 *pdu;
+
+	pdu = buf + (offset >> 3);
+	bit_pos = 8 - (offset & 0x7);
+
+	/* Field to be extracted is within current byte */
+	if (nbit <= bit_pos)
+		return (*pdu >> (bit_pos - nbit)) & ((1 << nbit) - 1);
+
+	/* Field to be extracted crossing two bytes */
+	val = *pdu & ((1 << bit_pos) - 1);
+	nbit -= bit_pos;
+	pdu++;
+
+	return (val << nbit) | (*pdu >> (8 - nbit));
+}
+
+/* Convert CDMA DTMF digits into a string */
+static gboolean dtmf_to_ascii(char *buf, const guint8 *addr,
+					guint8 num_fields)
+{
+	/*
+	 * Mapping from binary DTMF code to the digit it represents.
+	 * As defined in Table 2.7.1.3.2.4-4 of 3GPP2 C.S0005-E v2.0.
+	 * Note, 0 is NOT a valid value and not mapped to
+	 * any valid DTMF digit.
+	 */
+	static const char dtmf_digits[13] = {0, '1', '2', '3', '4', '5', '6',
+						'7', '8', '9', '0', '*', '#'};
+	guint8 index;
+	guint8 value;
+
+	for (index = 0; index < num_fields; index++) {
+		if (addr[index] == 0 || addr[index] > 12)
+			return FALSE;  /* Invalid digit in address field */
+
+		value = addr[index];
+		buf[index] = dtmf_digits[value];
+	}
+
+	buf[index] = 0; /* Make it NULL terminated string */
+
+	return TRUE;
+}
+
+const char *cdma_sms_address_to_string(const struct cdma_sms_address *addr)
+{
+	static char buf[CDMA_SMS_MAX_ADDR_FIELDS + 1];
+
+	/* TODO: Only support CDMA_SMS_DIGIT_MODE_4BIT_DTMF currently */
+	switch (addr->digit_mode) {
+	case CDMA_SMS_DIGIT_MODE_4BIT_DTMF:
+		if (dtmf_to_ascii(buf, addr->address,
+					addr->num_fields) == TRUE)
+			return buf;
+		else
+			return NULL;
+	case CDMA_SMS_DIGIT_MODE_8BIT_ASCII:
+		return NULL;
+	}
+
+	return NULL;
+}
+
+/* Decode Teleservice ID */
+static gboolean cdma_sms_decode_teleservice(const guint8 *buf, guint8 len,
+								void *data)
+{
+	enum cdma_sms_teleservice_id *id = data;
+
+	*id = bit_field_unpack(buf, 0, 8) << 8 |
+				bit_field_unpack(buf, 8, 8);
+
+	switch (*id) {
+	case CDMA_SMS_TELESERVICE_ID_CMT91:
+	case CDMA_SMS_TELESERVICE_ID_WPT:
+	case CDMA_SMS_TELESERVICE_ID_WMT:
+	case CDMA_SMS_TELESERVICE_ID_VMN:
+	case CDMA_SMS_TELESERVICE_ID_WAP:
+	case CDMA_SMS_TELESERVICE_ID_WEMT:
+	case CDMA_SMS_TELESERVICE_ID_SCPT:
+	case CDMA_SMS_TELESERVICE_ID_CATPT:
+		return TRUE;
+	}
+
+	return FALSE; /* Invalid teleservice type */
+}
+
+/* Decode Address parameter record */
+static gboolean cdma_sms_decode_addr(const guint8 *buf, guint8 len,
+							void *data)
+{
+	struct cdma_sms_address *addr = data;
+	guint16 bit_offset = 0;
+	guint8  chari_len;
+	guint16 total_num_bits = len * 8;
+	guint8  index;
+
+	addr->digit_mode = bit_field_unpack(buf, bit_offset, 1);
+	bit_offset += 1;
+
+	addr->number_mode = bit_field_unpack(buf, bit_offset, 1);
+	bit_offset += 1;
+
+	if (addr->digit_mode == CDMA_SMS_DIGIT_MODE_8BIT_ASCII) {
+		if (addr->number_mode == CDMA_SMS_NUM_MODE_DIGIT)
+			addr->digi_num_type =
+				bit_field_unpack(buf, bit_offset, 3);
+		else
+			addr->data_nw_num_type =
+				bit_field_unpack(buf, bit_offset, 3);
+
+		bit_offset += 3;
+
+		if (addr->number_mode == CDMA_SMS_NUM_MODE_DIGIT) {
+			if (bit_offset + 4 > total_num_bits)
+				return FALSE;
+
+			addr->number_plan =
+				bit_field_unpack(buf, bit_offset, 4);
+			bit_offset += 4;
+		}
+	}
+
+	if (bit_offset + 8 > total_num_bits)
+		return FALSE;
+
+	addr->num_fields = bit_field_unpack(buf, bit_offset, 8);
+	bit_offset += 8;
+
+	if (addr->digit_mode == CDMA_SMS_DIGIT_MODE_4BIT_DTMF)
+		chari_len = 4;
+	else
+		chari_len = 8;
+
+	if ((bit_offset + chari_len * addr->num_fields) > total_num_bits)
+		return FALSE;
+
+	for (index = 0; index < addr->num_fields; index++) {
+		addr->address[index] = bit_field_unpack(buf,
+							bit_offset,
+							chari_len);
+		bit_offset += chari_len;
+	}
+
+	return TRUE;
+}
+
+static char *decode_text_7bit_ascii(const struct cdma_sms_ud *ud)
+{
+	char *buf;
+
+	buf = g_new(char, ud->num_fields + 1);
+	if (buf == NULL)
+		return NULL;
+
+	memcpy(buf, ud->chari, ud->num_fields);
+	buf[ud->num_fields] = 0; /* Make it NULL terminated string */
+
+	return buf;
+}
+
+char *cdma_sms_decode_text(const struct cdma_sms_ud *ud)
+{
+	switch (ud->msg_encoding) {
+	case CDMA_SMS_MSG_ENCODING_OCTET:
+	case CDMA_SMS_MSG_ENCODING_EXTENDED_PROTOCOL_MSG:
+		return NULL; /* TODO */
+	case CDMA_SMS_MSG_ENCODING_7BIT_ASCII:
+		return decode_text_7bit_ascii(ud);
+	case CDMA_SMS_MSG_ENCODING_IA5:
+	case CDMA_SMS_MSG_ENCODING_UNICODE:
+	case CDMA_SMS_MSG_ENCODING_SHIFT_JIS:
+	case CDMA_SMS_MSG_ENCODING_KOREAN:
+	case CDMA_SMS_MSG_ENCODING_LATIN_HEBREW:
+	case CDMA_SMS_MSG_ENCODING_LATIN:
+	case CDMA_SMS_MSG_ENCODING_GSM_7BIT:
+	case CDMA_SMS_MSG_ENCODING_GSM_DATA_CODING:
+		return NULL; /* TODO */
+	}
+
+	return NULL;
+}
+
+/* Decode User Data */
+static gboolean cdma_sms_decode_ud(const guint8 *buf, guint8 len, void *data)
+{
+	guint16 bit_offset = 0;
+	guint8  chari_len = 0;
+	guint16 total_num_bits = len * 8;
+	guint8  index;
+	enum cdma_sms_msg_encoding  msg_encoding;
+	struct cdma_sms_ud *ud = data;
+
+	if (total_num_bits < 13)
+		return FALSE;
+
+	msg_encoding = bit_field_unpack(buf, bit_offset, 5);
+	ud->msg_encoding =  msg_encoding;
+	bit_offset += 5;
+
+	if (msg_encoding == CDMA_SMS_MSG_ENCODING_EXTENDED_PROTOCOL_MSG ||
+		msg_encoding == CDMA_SMS_MSG_ENCODING_GSM_DATA_CODING) {
+		/*
+		 * Skip message type field for now.
+		 * TODO: Add support for message type field.
+		 */
+		bit_offset += 8;
+	}
+
+	if (bit_offset + 8 > total_num_bits)
+		return FALSE;
+
+	ud->num_fields = bit_field_unpack(buf, bit_offset, 8);
+	bit_offset += 8;
+
+	switch (msg_encoding) {
+	case CDMA_SMS_MSG_ENCODING_OCTET:
+		chari_len = 8;
+		break;
+	case CDMA_SMS_MSG_ENCODING_EXTENDED_PROTOCOL_MSG:
+		return FALSE; /* TODO */
+	case CDMA_SMS_MSG_ENCODING_7BIT_ASCII:
+	case CDMA_SMS_MSG_ENCODING_IA5:
+		chari_len = 7;
+		break;
+	case CDMA_SMS_MSG_ENCODING_UNICODE:
+	case CDMA_SMS_MSG_ENCODING_SHIFT_JIS:
+	case CDMA_SMS_MSG_ENCODING_KOREAN:
+		return FALSE; /* TODO */
+	case CDMA_SMS_MSG_ENCODING_LATIN_HEBREW:
+	case CDMA_SMS_MSG_ENCODING_LATIN:
+		chari_len = 8;
+		break;
+	case CDMA_SMS_MSG_ENCODING_GSM_7BIT:
+		chari_len = 7;
+		break;
+	case CDMA_SMS_MSG_ENCODING_GSM_DATA_CODING:
+		return FALSE; /* TODO */
+	}
+
+	/* TODO: Add support for all other encoding types */
+	if (chari_len == 0)
+		return FALSE;
+
+	if (bit_offset + chari_len * ud->num_fields > total_num_bits)
+		return FALSE;
+
+	for (index = 0; index < ud->num_fields; index++) {
+		ud->chari[index] = bit_field_unpack(buf,
+						bit_offset,
+						chari_len);
+		bit_offset += chari_len;
+	}
+
+	return TRUE;
+}
+
+/* Decode Message Identifier */
+static gboolean cdma_sms_decode_message_id(const guint8 *buf, guint8 len,
+						void *data)
+{
+	struct cdma_sms_identifier *id = data;
+
+	if (len != 3)
+		return FALSE;
+
+	id->msg_type = bit_field_unpack(buf, 0, 4);
+
+	if (id->msg_type <= 0 ||
+			id->msg_type > CDMA_SMS_MSG_TYPE_SUBMIT_REPORT)
+		return FALSE; /* Invalid message type */
+
+	id->msg_id = (bit_field_unpack(buf, 4, 8) << 8) |
+			bit_field_unpack(buf, 12, 8);
+
+	id->header_ind = bit_field_unpack(buf, 20, 1);
+
+	return TRUE;
+}
+
+static gboolean find_and_decode(struct simple_iter *iter, guint8 rec_id,
+					rec_handler handler, void *data)
+{
+	guint8 id;
+	guint8 len;
+	const guint8 *buf;
+
+	while (simple_iter_next(iter) == TRUE) {
+		id = simple_iter_get_id(iter);
+		if (id != rec_id)
+			continue;
+
+		len = simple_iter_get_length(iter);
+		buf = simple_iter_get_data(iter);
+
+		return handler(buf, len, data);
+	}
+
+	return FALSE;
+}
+
+static rec_handler subparam_handler_for_id(enum cdma_sms_subparam_id id)
+{
+	switch (id) {
+	case CDMA_SMS_SUBPARAM_ID_MESSAGE_ID:
+		return cdma_sms_decode_message_id;
+	case CDMA_SMS_SUBPARAM_ID_USER_DATA:
+		return cdma_sms_decode_ud;
+	case CDMA_SMS_SUBPARAM_ID_USER_RESPONSE_CODE:
+	case CDMA_SMS_SUBPARAM_ID_MC_TIME_STAMP:
+	case CDMA_SMS_SUBPARAM_ID_VALIDITY_PERIOD_ABSOLUTE:
+	case CDMA_SMS_SUBPARAM_ID_VALIDITY_PERIOD_RELATIVE:
+	case CDMA_SMS_SUBPARAM_ID_DEFERRED_DELIVERY_TIME_ABSOLUTE:
+	case CDMA_SMS_SUBPARAM_ID_DEFERRED_DELIVERY_TIME_RELATIVE:
+	case CDMA_SMS_SUBPARAM_ID_PRIORITY_INDICATOR:
+	case CDMA_SMS_SUBPARAM_ID_PRIVACY_INDICATOR:
+	case CDMA_SMS_SUBPARAM_ID_REPLY_OPTION:
+	case CDMA_SMS_SUBPARAM_ID_NUMBER_OF_MESSAGES:
+	case CDMA_SMS_SUBPARAM_ID_ALERT_ON_MESSAGE_DELIVERY:
+	case CDMA_SMS_SUBPARAM_ID_LANGUAGE_INDICATOR:
+	case CDMA_SMS_SUBPARAM_ID_CALL_BACK_NUMBER:
+	case CDMA_SMS_SUBPARAM_ID_MESSAGE_DISPLAY_MODE:
+	case CDMA_SMS_SUBPARAM_ID_MULTIPLE_ENCODING_USER_DATA:
+	case CDMA_SMS_SUBPARAM_ID_MESSAGE_DEPOSIT_INDEX:
+	case CDMA_SMS_SUBPARAM_ID_SERVICE_CATEGORY_PROGRAM_DATA:
+	case CDMA_SMS_SUBPARAM_ID_SERVICE_CATEGORY_PROGRAM_RESULT:
+	case CDMA_SMS_SUBPARAM_ID_MESSAGE_STATUS:
+	case CDMA_SMS_SUBPARAM_ID_TP_FAILURE_CAUSE:
+	case CDMA_SMS_SUBPARAM_ID_ENHANCED_VMN:
+	case CDMA_SMS_SUBPARAM_ID_ENHANCED_VMN_ACK:
+		return NULL; /* TODO */
+	}
+
+	return NULL;
+}
+
+struct subparam_handler_entry {
+	enum cdma_sms_subparam_id id;
+	int flags;
+	gboolean found;
+	void *data;
+};
+
+static gboolean decode_subparams(struct simple_iter *iter, guint32 *bitmap,
+					void *data, ...)
+{
+	GSList *entries = NULL;
+	GSList *l;
+	va_list args;
+	gboolean decode_result = TRUE;
+
+	va_start(args, data);
+
+	while (data != NULL) {
+		struct subparam_handler_entry *entry;
+
+		entry = g_new0(struct subparam_handler_entry, 1);
+
+		entry->data = data;
+		entry->id = va_arg(args, enum cdma_sms_subparam_id);
+		entry->flags = va_arg(args, int);
+
+		data = va_arg(args, void *);
+		entries = g_slist_prepend(entries, entry);
+	}
+
+	va_end(args);
+
+	entries = g_slist_reverse(entries);
+
+	l = entries;
+	while (simple_iter_next(iter) == TRUE) {
+		rec_handler handler;
+		struct subparam_handler_entry *entry;
+		guint8 subparam_len;
+		const guint8 *subparam_buf;
+		GSList *l2;
+
+		for (l2 = l; l2; l2 = l2->next) {
+			entry = l2->data;
+
+			if (simple_iter_get_id(iter) == entry->id)
+				break;
+		}
+
+		/* Ignore unexpected subparameter record */
+		if (l2 == NULL)
+			continue;
+
+		entry->found = TRUE;
+
+		subparam_len = simple_iter_get_length(iter);
+		subparam_buf = simple_iter_get_data(iter);
+
+		handler = subparam_handler_for_id(entry->id);
+
+		decode_result = handler(subparam_buf,
+					subparam_len,
+					entry->data);
+		if (decode_result == FALSE)
+			break; /* Stop if decoding failed */
+
+		set_bitmap(bitmap, entry->id);
+	}
+
+	for (; l; l = l->next) {
+		struct subparam_handler_entry *entry = l->data;
+
+		if ((entry->flags & CDMA_SMS_REC_FLAG_MANDATORY) &&
+			(entry->found == FALSE)) {
+			decode_result = FALSE;
+			break;
+		}
+	}
+
+	g_slist_foreach(entries, (GFunc) g_free, NULL);
+	g_slist_free(entries);
+
+	return decode_result;
+}
+
+/* Decode WMT */
+static gboolean cdma_sms_decode_wmt(struct simple_iter *iter,
+					struct cdma_sms_bearer_data *bd)
+{
+	switch (bd->id.msg_type) {
+	case CDMA_SMS_MSG_TYPE_RESERVED:
+		return FALSE; /* Invalid */
+	case CDMA_SMS_MSG_TYPE_DELIVER:
+		/*
+		 * WMT DELIVER, table 4.3.4-1 of C.S0015-B v2.0
+		 * TODO: Not all optional subparameters supported.
+		 */
+		return decode_subparams(iter,
+					&bd->subparam_bitmap,
+					&bd->wmt_deliver.ud,
+					CDMA_SMS_SUBPARAM_ID_USER_DATA,
+					0,
+					NULL);
+		break;
+	case CDMA_SMS_MSG_TYPE_SUBMIT:
+	case CDMA_SMS_MSG_TYPE_CANCEL:
+		return FALSE; /* Invalid for MT WMT */
+	case CDMA_SMS_MSG_TYPE_DELIVER_ACK:
+	case CDMA_SMS_MSG_TYPE_USER_ACK:
+	case CDMA_SMS_MSG_TYPE_READ_ACK:
+		return FALSE; /* TODO: Not supported yet */
+	case CDMA_SMS_MSG_TYPE_DELIVER_REPORT:
+	case CDMA_SMS_MSG_TYPE_SUBMIT_REPORT:
+		return FALSE; /* Invalid for MT WMT */
+	}
+
+	return FALSE;
+}
+
+static gboolean p2p_decode_bearer_data(const guint8 *buf, guint8 len,
+					enum cdma_sms_teleservice_id tele_id,
+					struct cdma_sms_bearer_data *bd)
+{
+	struct simple_iter iter;
+
+	simple_iter_init(&iter, buf, len);
+
+	/* Message Identifier is mandatory, * Section 4 of C.S0015-B v2.0 */
+	if (find_and_decode(&iter,
+				CDMA_SMS_SUBPARAM_ID_MESSAGE_ID,
+				cdma_sms_decode_message_id,
+				&bd->id) != TRUE)
+		return FALSE;
+
+	set_bitmap(&bd->subparam_bitmap, CDMA_SMS_SUBPARAM_ID_MESSAGE_ID);
+
+	simple_iter_init(&iter, buf, len);
+
+	switch (tele_id) {
+	case CDMA_SMS_TELESERVICE_ID_CMT91:
+	case CDMA_SMS_TELESERVICE_ID_WPT:
+		return FALSE; /* TODO */
+	case CDMA_SMS_TELESERVICE_ID_WMT:
+		return cdma_sms_decode_wmt(&iter, bd);
+	case CDMA_SMS_TELESERVICE_ID_VMN:
+	case CDMA_SMS_TELESERVICE_ID_WAP:
+	case CDMA_SMS_TELESERVICE_ID_WEMT:
+	case CDMA_SMS_TELESERVICE_ID_SCPT:
+	case CDMA_SMS_TELESERVICE_ID_CATPT:
+		return FALSE; /* TODO */
+	}
+
+	return FALSE;
+}
+
+/* Decode Bearer Data */
+static gboolean cdma_sms_decode_bearer_data(const guint8 *buf, guint8 len,
+								void *data)
+{
+	struct cdma_sms *msg = data;
+
+	switch (msg->type) {
+	case CDMA_SMS_TP_MSG_TYPE_P2P:
+		return p2p_decode_bearer_data(buf, len,
+						msg->p2p_msg.teleservice_id,
+						&msg->p2p_msg.bd);
+	case CDMA_SMS_TP_MSG_TYPE_BCAST:
+		return FALSE; /* TODO */
+	case CDMA_SMS_TP_MSG_TYPE_ACK:
+		return FALSE; /* Invalid */
+	}
+
+	return FALSE;
+}
+
+static rec_handler param_handler_for_id(enum cdma_sms_param_id id,
+						struct cdma_sms *incoming,
+						void **data)
+{
+	if (incoming->type != CDMA_SMS_TP_MSG_TYPE_P2P)
+		return NULL; /* TODO: Other types not supported yet */
+
+	switch (id) {
+	case CDMA_SMS_PARAM_ID_TELESERVICE_IDENTIFIER:
+		*data = &incoming->p2p_msg.teleservice_id;
+		return cdma_sms_decode_teleservice;
+	case CDMA_SMS_PARAM_ID_SERVICE_CATEGORY:
+		return NULL; /* TODO */
+	case CDMA_SMS_PARAM_ID_ORIGINATING_ADDRESS:
+		*data = &incoming->p2p_msg.oaddr;
+		return cdma_sms_decode_addr;
+	case CDMA_SMS_PARAM_ID_ORIGINATING_SUBADDRESS:
+	case CDMA_SMS_PARAM_ID_DESTINATION_ADDRESS:
+	case CDMA_SMS_PARAM_ID_DESTINATION_SUBADDRESS:
+	case CDMA_SMS_PARAM_ID_BEARER_REPLY_OPTION:
+	case CDMA_SMS_PARAM_ID_CAUSE_CODE:
+		return NULL; /* TODO */
+	case CDMA_SMS_PARAM_ID_BEARER_DATA:
+		*data = incoming;
+		return cdma_sms_decode_bearer_data;
+	}
+
+	return NULL;
+}
+
+static gboolean cdma_sms_p2p_decode(const guint8 *pdu, guint8 len,
+					struct cdma_sms *incoming)
+{
+	struct simple_iter iter;
+
+	simple_iter_init(&iter, pdu, len);
+
+	/*
+	 * Teleservice Identifier is mandatory,
+	 * Table 3.4.2.1-1 of C.S0015-B v2.0
+	 */
+	if (find_and_decode(&iter,
+				CDMA_SMS_PARAM_ID_TELESERVICE_IDENTIFIER,
+				cdma_sms_decode_teleservice,
+				&incoming->p2p_msg.teleservice_id) != TRUE)
+		return FALSE;
+
+	set_bitmap(&incoming->p2p_msg.param_bitmap,
+			CDMA_SMS_PARAM_ID_TELESERVICE_IDENTIFIER);
+
+	simple_iter_init(&iter, pdu, len);
+
+	while (simple_iter_next(&iter) == TRUE) {
+		rec_handler handler;
+		enum cdma_sms_param_id rec_id;
+		guint8 rec_len;
+		const guint8 *rec_buf;
+		void *dataobj;
+
+		rec_id = simple_iter_get_id(&iter);
+		if (rec_id == CDMA_SMS_PARAM_ID_TELESERVICE_IDENTIFIER)
+			continue;
+
+		rec_len = simple_iter_get_length(&iter);
+		rec_buf = simple_iter_get_data(&iter);
+
+		handler = param_handler_for_id(rec_id, incoming, &dataobj);
+		if (handler != NULL) {
+			if (handler(rec_buf, rec_len, dataobj) == FALSE)
+				return FALSE;
+
+			set_bitmap(&incoming->p2p_msg.param_bitmap, rec_id);
+		}
+	}
+
+	/*
+	 * Originating Address is mandatory field,
+	 * Table 3.4.2.1-1 of C.S0015-B v2.0
+	 */
+	if ((incoming->p2p_msg.param_bitmap &
+			(1 << CDMA_SMS_PARAM_ID_ORIGINATING_ADDRESS)) == 0)
+		return FALSE;
+
+	return TRUE;
+}
+
+gboolean cdma_sms_decode(const guint8 *pdu, guint8 len,
+				struct cdma_sms *incoming)
+{
+	incoming->type = bit_field_unpack(pdu, 0, 8);
+	pdu += 1;
+	len -= 1;
+
+	switch (incoming->type) {
+	case CDMA_SMS_TP_MSG_TYPE_P2P:
+		return cdma_sms_p2p_decode(pdu, len, incoming);
+	case CDMA_SMS_TP_MSG_TYPE_BCAST:
+	case CDMA_SMS_TP_MSG_TYPE_ACK:
+		/* TODO: Not supported yet */
+		return FALSE;
+	}
+
+	return FALSE;
+}