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"


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();
}

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;
}

}
1	/* using http://sourceforge.net/projects/libserial/
2	*/
3
4
5	#include "SmsPdu.h"
6
7	#include <string>
8	#include <sstream>
9
10	#include <time.h>
11	#include <stdlib.h>
12
13	#include "common.h"
14	#include "util.h"
15
16
17	using namespace std;
18
19
20	namespace SmsPdu
21	{
22
23
24
25	string SwitchChars(string input)
26	{
27	for (unsigned int i=1; i<input.length(); i+=2)
28	{
29	char tmp = input[i];
30	input[i] = input[i-1];
31	input[i-1] = tmp;
32	}
33	return input;
34	}
35
36	string EncodePhonenr(string input)
37	{
38	if ( (input.length() % 2) == 1)
39	input.append("F");
40	return SwitchChars(input);
41	}
42
43	string DecodePhonenr(string input)
44	{
45	input = SwitchChars(input);
46	int last = input.length() -1;
47
48	if (input.at(last) == 'F')
49	input.erase(last,1);
50	return input;
51	}
52
53
54
55
56	string HexformatVector(vector<unsigned char> vec)
57	{
58	ostringstream os;
59
60	for (unsigned int i=0; i<vec.size(); ++i)
61	{
62	os.width(2);
63	os.fill('0');
64	os << hex << uppercase << static_cast<unsigned int>(vec.at(i));
65	}
66
67
68	return os.str();
69	}
70
71	std::string Decode8to7bit(vector<unsigned char> input)
72	{
73	string result;
74
75	int shift = 0;
76	for (unsigned int i=0; i<input.size(); ++i)
77	{
78	unsigned char current = input.at(i);
79	unsigned char prev = (i>0) ? input.at(i-1) : 0;
80
81	current <<= shift;
82
83	prev >>= (8-shift);
84
85	unsigned char byte = current \| prev;
86	byte &= 0x7F;
87
88	result.append(1, byte);
89
90	if (shift == 6)
91	result.append(1, input.at(i) >> 1);
92
93	shift = (shift+1) % 7;
94
95	}
96
97	return result;
98	}
99
100
101
102
103	vector<unsigned char> Encode7to8bit(std::string str)
104	{
105	vector<unsigned char> buf;
106
107	int shift = 0;
108	for (unsigned int i=0; i<str.size(); ++i)
109	{
110	unsigned char current = str.at(i) & 0x7F;
111	unsigned char next = ( (i+1)<str.size()) ? str.at(i+1) : 0;
112	next &= 0x7F;
113
114	current >>= shift;
115	next <<= (7-shift);
116
117	unsigned char byte = current \| next;
118	buf.push_back(byte);
119
120	if (shift == 6)
121	i++;
122
123	shift = (shift+1) % 7;
124
125	}
126
127	return buf;
128	}
129
130	vector<PduInfo> CreateSmsPdu(string to, string message, bool allowMultipart)
131	{
132	bool multipart = allowMultipart && message.length() > 160;
133
134	const unsigned char UDHI = multipart ? 0x40 : 0;
135
136	srand(time(0));
137	unsigned char csms_ref = rand() % 128;
138
139	int part_count;
140
141	const int PDU_LEN = 153;
142
143	if (multipart)
144	{
145	if (message.length() > 800)
146	{
147	Common::instance()->logMessage("Trying to send multipart sms > 800 bytes !!!");
148	message = message.substr(0,800);
149	}
150
151	part_count = message.length() / PDU_LEN;
152	if (message.length() % PDU_LEN)
153	part_count++;
154	}
155	else
156	{
157	part_count = 1;
158	}
159
160	vector<PduInfo> result;
161	for (int partnr = 0; partnr < part_count; ++partnr)
162	{
163	vector<unsigned char> pdu;
164
165	pdu.push_back(0x00); // use SMSC from phone
166	pdu.push_back( 0x01\|UDHI ); // first octet -- no timeout
167	pdu.push_back(0x00); // TP-MR message reference
168	pdu.push_back(to.length() ); //length of phone nr
169	pdu.push_back(0x81); // type of address (international nr + ISDN/telephone range) - else try 0x81
170
171
172	string phone = EncodePhonenr(to);
173	pdu.insert( pdu.end(), phone.begin(), phone.end());
174
175	pdu.push_back(0x00); // Protocol identifier
176	pdu.push_back(0x00); // Data coding scheme
177
178	string message_part;
179	if (multipart)
180	{
181	message_part = message.substr(0, PDU_LEN);
182	message.erase(0, PDU_LEN);
183
184	pdu.push_back( message_part.length()+ 7 ); //UserDataLength
185	pdu.push_back( 0x06 ); // UDH Len
186	pdu.push_back( 0x00 ); // UDH Element Identifier
187	pdu.push_back( 0x03 ); // UDH element length
188	pdu.push_back( csms_ref ); // csms_ref reference
189	pdu.push_back( part_count );
190	pdu.push_back( partnr+1 );
191	pdu.push_back( 0x00);
192
193	}
194	else
195	{
196	if (message.length() > 160)
197	{
198	message_part = message.substr(0,160); //truncate to 160
199	Common::instance()->logMessage("Truncated message");
200	}
201	else
202	{
203	message_part = message;
204	}
205
206	pdu.push_back( message_part.length() ); //UserDataLength
207	}
208
209	vector<unsigned char> userData = Encode7to8bit(message_part);
210
211	pdu.insert( pdu.end(), userData.begin(), userData.end());
212
213	PduInfo info;
214	info.len = pdu.size()-1;
215	info.pdu = HexformatVector(pdu);
216	result.push_back(info);
217
218	}
219	return result;
220	}
221
222	}