projects/smsdaemon/SmsPdu.cpp

/* using http://sourceforge.net/projects/libserial/
 */


#include "SmsPdu.h"

#include <string>
#include <sstream>

#include <time.h>
#include <stdlib.h> 

#include "common.h"
#include "util.h"

#include <iostream>

using namespace std;


namespace SmsPdu
{


        string SwitchChars(string input)
        {
                for (unsigned int i=1; i<input.length(); i+=2)
        {
                        char tmp = input[i];
                        input[i] = input[i-1];
                        input[i-1] = tmp;
                }
                return input;
        }

        string EncodePhonenr(string input)
        {
                if ( (input.length() % 2) == 1)
                        input.append("F");
                return SwitchChars(input);
        }

        string DecodePhonenr(string input)
        {
                input = SwitchChars(input);
                int last = input.length() -1;

                if (input.at(last) == 'F')
                        input.erase(last,1);
                return input;
        }


        string HexformatVector(vector<unsigned char> vec)
        {
                ostringstream os;

                for (unsigned int i=0; i<vec.size(); ++i)
                {
                        os.width(2);
                        os.fill('0');
                        os << hex << uppercase << static_cast<unsigned int>(vec.at(i));
                }


                return os.str();
        }

        vector<unsigned char> HexDecodeString(string str)
        {
                vector<unsigned char> vec;
                for (unsigned int i=0; i<str.length(); i+=2)
                        vec.push_back( strtol( str.substr(i,2).c_str(), 0, 16 ));

                return vec;
        }

        std::string Decode8to7bit(vector<unsigned char> input)
        {
                string result;

                int shift = 0;
                for (unsigned int i=0; i<input.size(); ++i)
                {
                        unsigned char current = input.at(i);
                        unsigned char prev = (i>0) ? input.at(i-1) : 0;

                        current <<= shift;

                        prev >>= (8-shift);

                        unsigned char byte = current | prev;
                        byte &= 0x7F;

                        result.append(1, byte);

                        if (shift == 6)
                                result.append(1, input.at(i) >> 1);

                        shift = (shift+1) % 7;

                }

                return result;
        }


        vector<unsigned char> Encode7to8bit(std::string str)
        {
                vector<unsigned char> buf;

                int shift = 0;
                for (unsigned int i=0; i<str.size(); ++i)
                {
                        unsigned char current = str.at(i) & 0x7F;
                        unsigned char next = ( (i+1)<str.size()) ? str.at(i+1) : 0;
                        next &= 0x7F;

                        current >>= shift;
                        next <<= (7-shift);

                        unsigned char byte = current | next;
                        buf.push_back(byte);

                        if (shift == 6)
                                i++;

                        shift = (shift+1) % 7;

                }

                return buf;
        }

        vector<PduInfo> CreateSmsPdu(string to, string message, bool allowMultipart)
        {
                bool multipart = allowMultipart && message.length() > 160;

                const unsigned char UDHI = multipart ? 0x40 : 0;

                srand(time(0));
                unsigned char csms_ref = rand() % 128;

                int part_count;

                const int PDU_LEN = 153;

                if (multipart)
                {
                        if (message.length() > 800)
                        {
                                Common::instance()->logMessage("Trying to send multipart sms > 800 bytes !!!");
                                message = message.substr(0,800);
                        }

                        part_count = message.length() / PDU_LEN;
                        if (message.length() % PDU_LEN)
                                part_count++;
                }
                else
                {
                        part_count = 1;
                }

                vector<PduInfo> result;
                for (int partnr = 0; partnr < part_count; ++partnr)
                {
                        vector<unsigned char> pdu;

                        pdu.push_back(0x00); // use SMSC from phone
                        pdu.push_back( 0x01|UDHI ); // first octet -- no timeout
                        pdu.push_back(0x00); // TP-MR message reference
                        pdu.push_back(to.length() ); //length of phone nr
                        pdu.push_back(0x81); // type of address (international nr  + ISDN/telephone range) - else try 0x81

                
                        string phone = EncodePhonenr(to);
                        pdu.insert( pdu.end(), phone.begin(), phone.end());

                        pdu.push_back(0x00); // Protocol identifier
                        pdu.push_back(0x00); // Data coding scheme 

                        string message_part;
                        if (multipart)
                        {
                                message_part = message.substr(0, PDU_LEN);
                                message.erase(0, PDU_LEN);

                                pdu.push_back( message_part.length()+ 7 );  //UserDataLength
                                pdu.push_back( 0x06 ); // UDH Len
                                pdu.push_back( 0x00 ); // UDH Element Identifier
                                pdu.push_back( 0x03 ); // UDH element length
                                pdu.push_back( csms_ref ); // csms_ref reference
                                pdu.push_back( part_count );
                                pdu.push_back( partnr+1 );
                                pdu.push_back( 0x00);

                        }
                        else
                        {
                                if (message.length() > 160)
                                {
                                        message_part = message.substr(0,160); //truncate to 160
                                        Common::instance()->logMessage("Truncated message");
                                }
                                else
                                {
                                        message_part = message;
                                }

                                pdu.push_back( message_part.length() ); //UserDataLength
                        }

                        vector<unsigned char> userData = Encode7to8bit(message_part);

                        pdu.insert( pdu.end(), userData.begin(), userData.end());

                        PduInfo info;
                        info.len = pdu.size()-1;
                        info.pdu = HexformatVector(pdu);
                        result.push_back(info);

                }
                return result;
        }

        typedef vector<unsigned char>::iterator char_it;

        string DecodeRawPhonenr(char_it start, char_it end)
        {
                ostringstream os;

                for (char_it it = start; it != end; ++it)
                {
                        os.width(2);
                        os.fill('0');
                        os << hex << (int)(*it);
                }
                return DecodePhonenr(os.str());
        }

        string DecodeTimestamp(char_it start, char_it end)
        {
                string stamp = DecodeRawPhonenr(start,end);

                ostringstream os;

                os << stamp.substr(0,2) << "/"; //year
                os << stamp.substr(2,2) << "/"; //month
                os << stamp.substr(4,2) << ","; //day
                os << stamp.substr(6,2) << ":"; //hour
                os << stamp.substr(8,2) << ":"; //minute
                os << stamp.substr(10,2) ; //second

                int timezone = strtol(stamp.substr(12,2).c_str(), 0, 16);


                if (timezone > 127)
                        os << "-";
                else
                        os << "+";

                os.width(2);
                os.fill('0');
                os << (timezone & 0x7F);

                return os.str();
        }


        SMS ParseSmsPdu(std::string pdu_str)
        {
                SMS result;

                vector<unsigned char> pdu = HexDecodeString(pdu_str);

                vector<unsigned char>::iterator it = pdu.begin();

                it += (*it++); // Skip smsc info

                unsigned char deliver_first_octet = (*it++);
                unsigned char sender_len = (*it++);
                if ( (sender_len % 2) == 1)
                        sender_len++;

                ++it; //ignore Type-Of-Address

                result.sender = DecodeRawPhonenr( it, it+(sender_len/2) );

                it += (sender_len/2);
                ++it; //protocol identifier
                ++it; //Data encoding

                result.timestamp = DecodeTimestamp(it, it+7);
                it += 7;

                unsigned char data_len = (*it++);

                vector<unsigned char> user_data;
                user_data.insert(user_data.end(), it, it+data_len);
                
                result.message = Decode8to7bit(user_data);
                

                return result;
        }

}
1	torben	59	/* using http://sourceforge.net/projects/libserial/
2			*/
3
4
5	torben	60	#include "SmsPdu.h"
6
7	torben	59	#include <string>
8			#include <sstream>
9
10	torben	60	#include <time.h>
11			#include <stdlib.h>
12	torben	59
13	torben	63	#include "common.h"
14	torben	59	#include "util.h"
15
16	torben	69	#include <iostream>
17	torben	59
18			using namespace std;
19
20
21			namespace SmsPdu
22			{
23
24
25	torben	68
26	torben	69	string SwitchChars(string input)
27	torben	59	{
28	torben	69	for (unsigned int i=1; i<input.length(); i+=2)
29			{
30			char tmp = input[i];
31			input[i] = input[i-1];
32			input[i-1] = tmp;
33			}
34			return input;
35	torben	59	}
36
37	torben	69	string EncodePhonenr(string input)
38			{
39			if ( (input.length() % 2) == 1)
40			input.append("F");
41			return SwitchChars(input);
42			}
43	torben	61
44	torben	69	string DecodePhonenr(string input)
45			{
46			input = SwitchChars(input);
47			int last = input.length() -1;
48	torben	68
49	torben	69	if (input.at(last) == 'F')
50			input.erase(last,1);
51			return input;
52			}
53	torben	59
54	torben	68
55
56
57	torben	69	string HexformatVector(vector<unsigned char> vec)
58	torben	59	{
59	torben	69	ostringstream os;
60	torben	59
61	torben	69	for (unsigned int i=0; i<vec.size(); ++i)
62			{
63			os.width(2);
64			os.fill('0');
65			os << hex << uppercase << static_cast<unsigned int>(vec.at(i));
66			}
67	torben	59
68
69	torben	69	return os.str();
70			}
71	torben	61
72	torben	69	vector<unsigned char> HexDecodeString(string str)
73	torben	68	{
74	torben	69	vector<unsigned char> vec;
75			for (unsigned int i=0; i<str.length(); i+=2)
76			vec.push_back( strtol( str.substr(i,2).c_str(), 0, 16 ));
77	torben	68
78	torben	69	return vec;
79			}
80	torben	68
81	torben	69	std::string Decode8to7bit(vector<unsigned char> input)
82			{
83			string result;
84	torben	68
85	torben	69	int shift = 0;
86			for (unsigned int i=0; i<input.size(); ++i)
87			{
88			unsigned char current = input.at(i);
89			unsigned char prev = (i>0) ? input.at(i-1) : 0;
90	torben	68
91	torben	69	current <<= shift;
92	torben	68
93	torben	69	prev >>= (8-shift);
94	torben	68
95	torben	69	unsigned char byte = current \| prev;
96			byte &= 0x7F;
97	torben	68
98	torben	69	result.append(1, byte);
99	torben	68
100	torben	69	if (shift == 6)
101			result.append(1, input.at(i) >> 1);
102	torben	61
103	torben	69	shift = (shift+1) % 7;
104	torben	68
105	torben	69	}
106	torben	68
107	torben	69	return result;
108			}
109	torben	68
110	torben	59
111	torben	69
112
113			vector<unsigned char> Encode7to8bit(std::string str)
114	torben	59	{
115	torben	69	vector<unsigned char> buf;
116	torben	59
117	torben	69	int shift = 0;
118			for (unsigned int i=0; i<str.size(); ++i)
119			{
120			unsigned char current = str.at(i) & 0x7F;
121			unsigned char next = ( (i+1)<str.size()) ? str.at(i+1) : 0;
122			next &= 0x7F;
123	torben	59
124	torben	69	current >>= shift;
125			next <<= (7-shift);
126	torben	59
127	torben	69	unsigned char byte = current \| next;
128			buf.push_back(byte);
129	torben	59
130	torben	69	if (shift == 6)
131			i++;
132	torben	59
133	torben	69	shift = (shift+1) % 7;
134
135			}
136
137			return buf;
138	torben	59	}
139
140	torben	69	vector<PduInfo> CreateSmsPdu(string to, string message, bool allowMultipart)
141			{
142			bool multipart = allowMultipart && message.length() > 160;
143	torben	59
144	torben	69	const unsigned char UDHI = multipart ? 0x40 : 0;
145	torben	59
146	torben	69	srand(time(0));
147			unsigned char csms_ref = rand() % 128;
148	torben	59
149	torben	69	int part_count;
150	torben	59
151	torben	69	const int PDU_LEN = 153;
152	torben	61
153	torben	69	if (multipart)
154			{
155			if (message.length() > 800)
156			{
157			Common::instance()->logMessage("Trying to send multipart sms > 800 bytes !!!");
158			message = message.substr(0,800);
159			}
160	torben	61
161	torben	69	part_count = message.length() / PDU_LEN;
162			if (message.length() % PDU_LEN)
163			part_count++;
164			}
165			else
166	torben	65	{
167	torben	69	part_count = 1;
168	torben	65	}
169
170	torben	69	vector<PduInfo> result;
171			for (int partnr = 0; partnr < part_count; ++partnr)
172			{
173			vector<unsigned char> pdu;
174	torben	59
175	torben	69	pdu.push_back(0x00); // use SMSC from phone
176			pdu.push_back( 0x01\|UDHI ); // first octet -- no timeout
177			pdu.push_back(0x00); // TP-MR message reference
178			pdu.push_back(to.length() ); //length of phone nr
179			pdu.push_back(0x81); // type of address (international nr + ISDN/telephone range) - else try 0x81
180	torben	59
181	torben	68
182	torben	69	string phone = EncodePhonenr(to);
183			pdu.insert( pdu.end(), phone.begin(), phone.end());
184	torben	60
185	torben	69	pdu.push_back(0x00); // Protocol identifier
186			pdu.push_back(0x00); // Data coding scheme
187	torben	60
188	torben	69	string message_part;
189			if (multipart)
190			{
191			message_part = message.substr(0, PDU_LEN);
192			message.erase(0, PDU_LEN);
193	torben	60
194	torben	69	pdu.push_back( message_part.length()+ 7 ); //UserDataLength
195			pdu.push_back( 0x06 ); // UDH Len
196			pdu.push_back( 0x00 ); // UDH Element Identifier
197			pdu.push_back( 0x03 ); // UDH element length
198			pdu.push_back( csms_ref ); // csms_ref reference
199			pdu.push_back( part_count );
200			pdu.push_back( partnr+1 );
201			pdu.push_back( 0x00);
202	torben	60
203	torben	63	}
204			else
205			{
206	torben	69	if (message.length() > 160)
207			{
208			message_part = message.substr(0,160); //truncate to 160
209			Common::instance()->logMessage("Truncated message");
210			}
211			else
212			{
213			message_part = message;
214			}
215
216			pdu.push_back( message_part.length() ); //UserDataLength
217	torben	63	}
218	torben	60
219	torben	69	vector<unsigned char> userData = Encode7to8bit(message_part);
220
221			pdu.insert( pdu.end(), userData.begin(), userData.end());
222
223			PduInfo info;
224			info.len = pdu.size()-1;
225			info.pdu = HexformatVector(pdu);
226			result.push_back(info);
227
228	torben	60	}
229	torben	69	return result;
230			}
231	torben	60
232	torben	69	typedef vector<unsigned char>::iterator char_it;
233	torben	60
234	torben	69	string DecodeRawPhonenr(char_it start, char_it end)
235			{
236			ostringstream os;
237	torben	60
238	torben	69	for (char_it it = start; it != end; ++it)
239			{
240			os.width(2);
241			os.fill('0');
242			os << hex << (int)(*it);
243			}
244			return DecodePhonenr(os.str());
245			}
246	torben	60
247	torben	69	string DecodeTimestamp(char_it start, char_it end)
248			{
249			string stamp = DecodeRawPhonenr(start,end);
250
251			ostringstream os;
252
253			os << stamp.substr(0,2) << "/"; //year
254			os << stamp.substr(2,2) << "/"; //month
255			os << stamp.substr(4,2) << ","; //day
256			os << stamp.substr(6,2) << ":"; //hour
257			os << stamp.substr(8,2) << ":"; //minute
258			os << stamp.substr(10,2) ; //second
259
260			int timezone = strtol(stamp.substr(12,2).c_str(), 0, 16);
261
262
263			if (timezone > 127)
264			os << "-";
265			else
266			os << "+";
267
268			os.width(2);
269			os.fill('0');
270			os << (timezone & 0x7F);
271
272			return os.str();
273	torben	60	}
274	torben	59
275	torben	69
276			SMS ParseSmsPdu(std::string pdu_str)
277			{
278			SMS result;
279
280			vector<unsigned char> pdu = HexDecodeString(pdu_str);
281
282			vector<unsigned char>::iterator it = pdu.begin();
283
284			it += (*it++); // Skip smsc info
285
286			unsigned char deliver_first_octet = (*it++);
287			unsigned char sender_len = (*it++);
288			if ( (sender_len % 2) == 1)
289			sender_len++;
290
291			++it; //ignore Type-Of-Address
292
293			result.sender = DecodeRawPhonenr( it, it+(sender_len/2) );
294
295			it += (sender_len/2);
296			++it; //protocol identifier
297			++it; //Data encoding
298
299			result.timestamp = DecodeTimestamp(it, it+7);
300			it += 7;
301
302			unsigned char data_len = (*it++);
303
304			vector<unsigned char> user_data;
305			user_data.insert(user_data.end(), it, it+data_len);
306
307			result.message = Decode8to7bit(user_data);
308
309
310			return result;
311			}
312
313	torben	59	}