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AT_CellularSMS.h
1 /*
2  * Copyright (c) 2017, Arm Limited and affiliates.
3  * SPDX-License-Identifier: Apache-2.0
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #ifndef AT_CELLULAR_SMS_H_
19 #define AT_CELLULAR_SMS_H_
20 
21 #include "CellularSMS.h"
22 #include "AT_CellularBase.h"
23 #include "Callback.h"
24 #include <time.h>
25 
26 namespace mbed {
27 
28 /**
29  * Class AT_CellularSMS
30  *
31  * Class for SMS sending, reading and deleting.
32  */
33 class AT_CellularSMS: public CellularSMS, public AT_CellularBase {
34 
35 public:
36  AT_CellularSMS(ATHandler &atHandler);
37  virtual ~AT_CellularSMS();
38 
39 public:
40  // from CellularSMS
41 
42  virtual nsapi_error_t initialize(CellularSMSMmode mode);
43 
44  virtual nsapi_size_or_error_t send_sms(const char *phone_number, const char *message, int msg_len);
45 
46  virtual nsapi_size_or_error_t get_sms(char *buf, uint16_t buf_len, char *phone_num, uint16_t phone_len,
47  char *time_stamp, uint16_t time_len, int *buf_size);
48 
49  virtual void set_sms_callback(Callback<void()> func);
50 
51  virtual nsapi_error_t set_cpms(const char *memr, const char *memw, const char *mems);
52 
53  virtual nsapi_error_t set_csca(const char *sca, int type);
54 
55  virtual nsapi_size_or_error_t set_cscs(const char *chr_set);
56 
57  virtual nsapi_error_t delete_all_messages();
58 
59  virtual void set_extra_sim_wait_time(int sim_wait_time);
60 
61 private:
62 
63  struct sms_info_t {
64  char date[SMS_MAX_TIME_STAMP_SIZE];
65  uint16_t msg_index[50]; // can hold up to 50 concatenated msg parts, indexes are in correct order. So max sms size is 50*140 = 7kb
66  uint16_t msg_size;
67  uint8_t parts;
68  uint8_t parts_added;
69  uint16_t msg_ref_number;
70  struct sms_info_t *next_info;
71  sms_info_t() : msg_size(0), parts(1), parts_added(1), msg_ref_number(0), next_info(0) {};
72  };
73 
74  // application callback function for received sms
75  Callback<void()> _cb;
76  CellularSMSMmode _mode;
77  bool _use_8bit_encoding;
78  uint32_t _sim_wait_time;
79  uint16_t _sms_message_ref_number;
80  sms_info_t *_sms_info;
81 
82  // SMS urc's
83  void cmt_urc();
84  void cmti_urc();
85 
86  /** Set command selects the format of messages used with send, list, read and write commands.
87  *
88  * @param msg_format 0 PDU mode, 1 text mode
89  * @return zero for success
90  */
91  nsapi_error_t set_cmgf(int msg_format);
92 
93  /** Set how receiving of new messages from the network is indicated to the TE.
94  *
95  * @return zero for success
96  */
97  nsapi_error_t set_cnmi();
98 
99  /** Set Text Mode Parameters
100  *
101  * @param fo See more from 3GPP TS 27.005 for all params.
102  * @param vp
103  * @param pid
104  * @param dcs
105  * @return zero for success
106  */
107  nsapi_error_t set_csmp(int fo, int vp, int pid, int dcs);
108 
109  /** CSDH - Set command controls whether detailed header information is shown in text mode (AT+CMGF=1) result codes.
110  *
111  * @param show_header 1 to show detailed header in text mode, 0 for not showing.
112  * @return zero for success
113  */
114  nsapi_error_t set_csdh(int show_header);
115 
116  /** Delete SMS in the given message position(s) in the storage
117  *
118  * @param sms struct containing index array to delete
119  * @return zero for success
120  */
121  nsapi_error_t delete_sms(sms_info_t *sms);
122 
123  /**
124  * Internal helper methods
125  */
126  nsapi_error_t list_messages();
127  int read_sms_params(char *, char *);
128  void free_linked_list();
129  void add_info(sms_info_t *info, int index, int part_number);
130  int read_udh_from_pdu(const char *pdu, sms_info_t *info, int &part_number, int &padding_bits);
131  nsapi_size_or_error_t get_data_from_pdu(const char *pdu, sms_info_t *info, int *part_number,
132  char *phone_number = NULL, char *msg = NULL);
133  nsapi_size_or_error_t read_pdu_payload(const char *pdu, int msg_len, int scheme, char *msg, int padding_bits);
134  sms_info_t *get_oldest_sms_index();
135  bool create_time(const char *time_string, time_t *time);
136  int compare_time_strings(const char *time_string_1, const char *time_string_2);
137  char *create_pdu(const char *phone_number, const char *message, uint8_t message_length, uint8_t msg_parts,
138  uint8_t msg_part_number, uint8_t &header_size);
139  nsapi_size_or_error_t read_sms_from_index(int msg_index, char *buf, uint16_t len, char *phone_num,
140  char *time_stamp);
141  nsapi_size_or_error_t read_sms(sms_info_t *sms, char *buf, char *phone_num, char *time_stamp);
142 
143  /** Packs the given str from ascii to 7bit gsm format and converts it to hex to the given buf.
144  *
145  * @param str string that is to be converted
146  * @param len length of the str buffer
147  * @param buf preallocated buffer that holds the converted string in hex format after successful call
148  * @param number_of_padding_bit padding bits needed to keep the octet boundary
149  * @return length of buffer buf or zero on failure
150  */
151  uint16_t pack_7_bit_gsm_and_hex(const char *str, uint16_t len, char *buf, int number_of_padding_bit);
152 
153  /** Unpacks the given hex- and 7-bit gsm encoded str to ascii string
154  *
155  * @param str string to convert to ascii string and write to buf
156  * @param len length of the str divided by two as str is hexencoded
157  * @param buf preallocated destination buffer
158  * @param padding_bits number of padding bits needed to hold the octet boundary
159  * @param msg_len Length of the received message, which is coded in str
160  * @return length of the destination buffer buf
161  *
162  */
163  uint16_t unpack_7_bit_gsm_to_str(const char *str, int len, char *buf, int padding_bits,
164  int msg_len);
165 };
166 
167 } // namespace mbed
168 
169 #endif // AT_CELLULAR_SMS_H_
mbed::AT_CellularSMS::set_extra_sim_wait_time
virtual void set_extra_sim_wait_time(int sim_wait_time)
Some modems need extra time between AT commands and responses, or there will be error -314...
mbed::AT_CellularSMS
Class AT_CellularSMS.
Definition: AT_CellularSMS.h:33
info
The key size.
Definition: kvstore_global_api.h:38
nsapi_error_t
signed int nsapi_error_t
Type used to represent error codes.
Definition: nsapi_types.h:95
nsapi_size_or_error_t
signed int nsapi_size_or_error_t
Type used to represent either a size or error passed through sockets.
Definition: nsapi_types.h:106
mbed::AT_CellularSMS::set_cscs
virtual nsapi_size_or_error_t set_cscs(const char *chr_set)
Set command sets the current character set used by the device.
mbed::AT_CellularSMS::set_csca
virtual nsapi_error_t set_csca(const char *sca, int type)
CSCA - set Service Center Address.
mbed::AT_CellularBase
Class AT_CellularBase.
Definition: AT_CellularBase.h:29
mbed::CellularSMS
Class CellularSMS.
Definition: CellularSMS.h:48
mbed::AT_CellularSMS::set_cpms
virtual nsapi_error_t set_cpms(const char *memr, const char *memw, const char *mems)
CPMS preferred message storage.
mbed::AT_CellularSMS::set_sms_callback
virtual void set_sms_callback(Callback< void()> func)
Callback that is called when new SMS is received.
mbed::AT_CellularSMS::get_sms
virtual nsapi_size_or_error_t get_sms(char *buf, uint16_t buf_len, char *phone_num, uint16_t phone_len, char *time_stamp, uint16_t time_len, int *buf_size)
Gets the oldest received sms.
mbed::Callback
Callback class based on template specialization.
Definition: Callback.h:39
mbed::ATHandler
Class for sending AT commands and parsing AT responses.
Definition: ATHandler.h:63
mbed::AT_CellularSMS::delete_all_messages
virtual nsapi_error_t delete_all_messages()
Deletes all messages from the currently set memory/SIM.
mbed::AT_CellularSMS::send_sms
virtual nsapi_size_or_error_t send_sms(const char *phone_number, const char *message, int msg_len)
Send the SMS with the given parameters.
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