Joaquin Verastegui / jro

Publish for the JRO Radar Controller.

Dependents:   JRO_CR2 frdm_test

Fork of jro by Miguel Urco

JroIpdata.cpp@4:de495ce256b8, 2015-02-10 (annotated)

Committer:
miguelcordero191
Date:
Tue Feb 10 14:28:42 2015 +0000
Revision:
4:de495ce256b8
Parent:
2:3d8d52e9751c
Child:
5:6500be930b36
Some features were added to library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
miguelcordero191 2:3d8d52e9751c 1 #include "JroIpdata.h"
miguelcordero191 2:3d8d52e9751c 2
miguelcordero191 2:3d8d52e9751c 3 void printCadena(char* cad, int lenc){
miguelcordero191 2:3d8d52e9751c 4
miguelcordero191 2:3d8d52e9751c 5 //printf("\r\n");
miguelcordero191 2:3d8d52e9751c 6 for (int i=0; i<lenc; i++){
miguelcordero191 2:3d8d52e9751c 7
miguelcordero191 2:3d8d52e9751c 8 //printf("cad[%d] = %d\r\n", i, cad[i]);
miguelcordero191 2:3d8d52e9751c 9 }
miguelcordero191 2:3d8d52e9751c 10
miguelcordero191 2:3d8d52e9751c 11 }
miguelcordero191 2:3d8d52e9751c 12
miguelcordero191 2:3d8d52e9751c 13 IpData::IpData(char* tx_buffer){
miguelcordero191 2:3d8d52e9751c 14
miguelcordero191 2:3d8d52e9751c 15 this->id = ID_DEV;
miguelcordero191 2:3d8d52e9751c 16 this->isValidData = false;
miguelcordero191 2:3d8d52e9751c 17
miguelcordero191 2:3d8d52e9751c 18 this->len_tx_data = 0;
miguelcordero191 2:3d8d52e9751c 19 this->tx_buff = tx_buffer;
miguelcordero191 2:3d8d52e9751c 20
miguelcordero191 2:3d8d52e9751c 21 }
miguelcordero191 2:3d8d52e9751c 22
miguelcordero191 2:3d8d52e9751c 23 char* IpData::__findHeader(char* buffer){
miguelcordero191 2:3d8d52e9751c 24 /*
miguelcordero191 2:3d8d52e9751c 25 Find header and get ip data (without header)
miguelcordero191 2:3d8d52e9751c 26
miguelcordero191 2:3d8d52e9751c 27 Input:
miguelcordero191 2:3d8d52e9751c 28
miguelcordero191 2:3d8d52e9751c 29 Return:
miguelcordero191 2:3d8d52e9751c 30 valid_ipdata: ip data without header
miguelcordero191 2:3d8d52e9751c 31
miguelcordero191 2:3d8d52e9751c 32 Example:
miguelcordero191 2:3d8d52e9751c 33
miguelcordero191 2:3d8d52e9751c 34 buffer = [ B0 B1 $ J R O $ B7 B8 B9 B10 ..... ]
miguelcordero191 2:3d8d52e9751c 35
miguelcordero191 2:3d8d52e9751c 36 return
miguelcordero191 2:3d8d52e9751c 37 valid_ip_data = [ B7 B8 B9 B10 ..... ]
miguelcordero191 2:3d8d52e9751c 38
miguelcordero191 2:3d8d52e9751c 39
miguelcordero191 2:3d8d52e9751c 40 */
miguelcordero191 2:3d8d52e9751c 41 char* valid_ip_data;
miguelcordero191 2:3d8d52e9751c 42
miguelcordero191 2:3d8d52e9751c 43 //printf("\r\nSearching header in %s\r\n", buffer);
miguelcordero191 2:3d8d52e9751c 44
miguelcordero191 2:3d8d52e9751c 45 //Finding header
miguelcordero191 2:3d8d52e9751c 46 valid_ip_data = strstr(buffer, HEADER);
miguelcordero191 2:3d8d52e9751c 47
miguelcordero191 2:3d8d52e9751c 48 if (valid_ip_data == NULL){
miguelcordero191 2:3d8d52e9751c 49 //printf("\r\nHeader was not found\r\n");
miguelcordero191 2:3d8d52e9751c 50 return NULL;
miguelcordero191 2:3d8d52e9751c 51 }
miguelcordero191 2:3d8d52e9751c 52
miguelcordero191 2:3d8d52e9751c 53 //printf("\r\nHeader was found %s\r\n", valid_ip_data);
miguelcordero191 2:3d8d52e9751c 54
miguelcordero191 2:3d8d52e9751c 55 //printf("\r\nskipping header ...\r\n");
miguelcordero191 2:3d8d52e9751c 56
miguelcordero191 2:3d8d52e9751c 57 valid_ip_data += 5; //skip header
miguelcordero191 2:3d8d52e9751c 58
miguelcordero191 2:3d8d52e9751c 59 return valid_ip_data;
miguelcordero191 2:3d8d52e9751c 60 }
miguelcordero191 2:3d8d52e9751c 61
miguelcordero191 2:3d8d52e9751c 62 char IpData::__getXor(char* data, unsigned long len_data){
miguelcordero191 2:3d8d52e9751c 63
miguelcordero191 2:3d8d52e9751c 64 char new_xor = 0;
miguelcordero191 2:3d8d52e9751c 65
miguelcordero191 2:3d8d52e9751c 66 for(unsigned long i = 0; i < len_data; i++){
miguelcordero191 2:3d8d52e9751c 67 new_xor = new_xor xor data[i];
miguelcordero191 2:3d8d52e9751c 68 }
miguelcordero191 2:3d8d52e9751c 69
miguelcordero191 2:3d8d52e9751c 70 return new_xor;
miguelcordero191 2:3d8d52e9751c 71 }
miguelcordero191 2:3d8d52e9751c 72
miguelcordero191 2:3d8d52e9751c 73 int IpData::__verifyData(char* ip_data, unsigned long len_data){
miguelcordero191 2:3d8d52e9751c 74
miguelcordero191 2:3d8d52e9751c 75 char new_xor = 0;
miguelcordero191 2:3d8d52e9751c 76
miguelcordero191 2:3d8d52e9751c 77 new_xor = this->__getXor(ip_data, len_data);
miguelcordero191 2:3d8d52e9751c 78
miguelcordero191 2:3d8d52e9751c 79 if (new_xor != 0){
miguelcordero191 2:3d8d52e9751c 80 //printf("\r\nInvalid XOR: %d\r\n", new_xor);
miguelcordero191 2:3d8d52e9751c 81 return 0;
miguelcordero191 2:3d8d52e9751c 82 }
miguelcordero191 2:3d8d52e9751c 83
miguelcordero191 2:3d8d52e9751c 84 //printf("\r\nXOR verified successfully\r\n");
miguelcordero191 2:3d8d52e9751c 85 return 1;
miguelcordero191 2:3d8d52e9751c 86 }
miguelcordero191 2:3d8d52e9751c 87
miguelcordero191 2:3d8d52e9751c 88 int IpData::__getParameters(){
miguelcordero191 2:3d8d52e9751c 89 return 1;
miguelcordero191 2:3d8d52e9751c 90 }
miguelcordero191 2:3d8d52e9751c 91
miguelcordero191 4:de495ce256b8 92 char* IpData::encode(unsigned short cmd, const char* payload, unsigned long len_payload){
miguelcordero191 2:3d8d52e9751c 93
miguelcordero191 2:3d8d52e9751c 94 int head_size= strlen(HEADER);
miguelcordero191 2:3d8d52e9751c 95 char xor_wr;
miguelcordero191 2:3d8d52e9751c 96
miguelcordero191 2:3d8d52e9751c 97 //Copy header
miguelcordero191 2:3d8d52e9751c 98 strcpy(tx_buff, HEADER);
miguelcordero191 2:3d8d52e9751c 99 len_tx_data = len_payload + 5; //Incluye la longitud de la data + 1B (id_class) + 1B (id_dev) + 2B (cmd) + 1B (xor)
miguelcordero191 2:3d8d52e9751c 100 len_tx_buffer = len_tx_data + 9; //Incluye 5 bytes del Header + 4 de la longitud
miguelcordero191 2:3d8d52e9751c 101
miguelcordero191 2:3d8d52e9751c 102 tx_buff[0+head_size] = (len_tx_data >> 24) & 0xff;
miguelcordero191 2:3d8d52e9751c 103 tx_buff[1+head_size] = (len_tx_data >> 16) & 0xff;
miguelcordero191 2:3d8d52e9751c 104 tx_buff[2+head_size] = (len_tx_data >> 8) & 0xff;
miguelcordero191 2:3d8d52e9751c 105 tx_buff[3+head_size] = len_tx_data & 0xff;
miguelcordero191 2:3d8d52e9751c 106
miguelcordero191 2:3d8d52e9751c 107 tx_buff[4+head_size] = ID_CLASS;
miguelcordero191 2:3d8d52e9751c 108 tx_buff[5+head_size] = ID_DEV;
miguelcordero191 2:3d8d52e9751c 109
miguelcordero191 2:3d8d52e9751c 110 tx_buff[6+head_size] = (cmd >> 8) & 0xff;
miguelcordero191 2:3d8d52e9751c 111 tx_buff[7+head_size] = cmd & 0xff;
miguelcordero191 2:3d8d52e9751c 112
miguelcordero191 2:3d8d52e9751c 113 for (unsigned int i=0; i<len_payload; i++){
miguelcordero191 2:3d8d52e9751c 114 tx_buff[8+head_size+i] = payload[i];
miguelcordero191 2:3d8d52e9751c 115 }
miguelcordero191 2:3d8d52e9751c 116
miguelcordero191 2:3d8d52e9751c 117 xor_wr = this->__getXor(&tx_buff[0+head_size], len_tx_data+4-1); //Incluir todos los bytes de datos mas los 4B de la longitud menos 1B del xor
miguelcordero191 2:3d8d52e9751c 118
miguelcordero191 2:3d8d52e9751c 119 tx_buff[8+head_size+len_payload] = xor_wr;
miguelcordero191 2:3d8d52e9751c 120
miguelcordero191 2:3d8d52e9751c 121 //printf("\r\nTx Buffer = ");
miguelcordero191 2:3d8d52e9751c 122 for(unsigned long i=0; i< len_tx_buffer; i++){
miguelcordero191 2:3d8d52e9751c 123 //printf("0x%x ", tx_buff[i]);
miguelcordero191 2:3d8d52e9751c 124 }
miguelcordero191 2:3d8d52e9751c 125
miguelcordero191 2:3d8d52e9751c 126 return tx_buff;
miguelcordero191 2:3d8d52e9751c 127
miguelcordero191 2:3d8d52e9751c 128 }
miguelcordero191 2:3d8d52e9751c 129
miguelcordero191 2:3d8d52e9751c 130
miguelcordero191 2:3d8d52e9751c 131 int IpData::decode(char* buffer, unsigned long len_buffer){
miguelcordero191 2:3d8d52e9751c 132
miguelcordero191 2:3d8d52e9751c 133 char* ip_data;
miguelcordero191 2:3d8d52e9751c 134 unsigned long len_data;
miguelcordero191 2:3d8d52e9751c 135
miguelcordero191 2:3d8d52e9751c 136 this->isValidData = false;
miguelcordero191 2:3d8d52e9751c 137
miguelcordero191 2:3d8d52e9751c 138 //printf("\r\nRx Buffer = ");
miguelcordero191 2:3d8d52e9751c 139 for(unsigned long i=0; i< len_buffer; i++){
miguelcordero191 2:3d8d52e9751c 140 //printf("0x%x ", buffer[i]);
miguelcordero191 2:3d8d52e9751c 141 }
miguelcordero191 2:3d8d52e9751c 142
miguelcordero191 2:3d8d52e9751c 143 if (len_buffer < 13){
miguelcordero191 2:3d8d52e9751c 144 //printf("\r\nLongitud de la data insuficiente\r\n");
miguelcordero191 2:3d8d52e9751c 145 return 0;
miguelcordero191 2:3d8d52e9751c 146 }
miguelcordero191 2:3d8d52e9751c 147
miguelcordero191 2:3d8d52e9751c 148 //Finding header and get ip data (without header)
miguelcordero191 2:3d8d52e9751c 149 ip_data = this->__findHeader(buffer);
miguelcordero191 2:3d8d52e9751c 150
miguelcordero191 2:3d8d52e9751c 151 if (ip_data == NULL)
miguelcordero191 2:3d8d52e9751c 152 return 0;
miguelcordero191 2:3d8d52e9751c 153
miguelcordero191 2:3d8d52e9751c 154 len_data = ip_data[0]*65536*256 + ip_data[1]*65536 + ip_data[2]*256 + ip_data[3];
miguelcordero191 2:3d8d52e9751c 155
miguelcordero191 2:3d8d52e9751c 156 //printf("\r\nLen data = %d\r\n", len_data);
miguelcordero191 2:3d8d52e9751c 157
miguelcordero191 2:3d8d52e9751c 158 this->rx_buff = ip_data;
miguelcordero191 2:3d8d52e9751c 159
miguelcordero191 2:3d8d52e9751c 160 //len_data + 4 = longitud de toda la data (incluyendo los 4 bytes del campo len)
miguelcordero191 2:3d8d52e9751c 161 if (not this->__verifyData(ip_data, len_data+4))
miguelcordero191 2:3d8d52e9751c 162 return 0;
miguelcordero191 2:3d8d52e9751c 163
miguelcordero191 2:3d8d52e9751c 164 //head = ip_data[0:5];
miguelcordero191 2:3d8d52e9751c 165 this->id_class = ip_data[4];
miguelcordero191 2:3d8d52e9751c 166 this->id_dev = ip_data[5];
miguelcordero191 2:3d8d52e9751c 167 this->cmd = ip_data[6]*256 + ip_data[7];
miguelcordero191 2:3d8d52e9751c 168 this->payload = ip_data + 8;
miguelcordero191 2:3d8d52e9751c 169 this->len_payload = len_data - 5; //1B id_class, 1B id_dev, 2B cmd y 1B xor
miguelcordero191 2:3d8d52e9751c 170 this->xor_rd = ip_data[4+len_data-1];
miguelcordero191 2:3d8d52e9751c 171
miguelcordero191 2:3d8d52e9751c 172 //printf("\r\nID_CLASS = 0x%x, ID_DEV = 0x%x, CMD = 0x%x, XOR = 0x%x", id_class, id_dev, cmd, xor_rd);
miguelcordero191 2:3d8d52e9751c 173 //printf("\r\nPAYLOAD[0] = 0x%x, PYLD_LEN = 0x%x\r\n", payload[0], len_payload);
miguelcordero191 2:3d8d52e9751c 174
miguelcordero191 2:3d8d52e9751c 175 if (this->id_class == ID_CLASS){
miguelcordero191 2:3d8d52e9751c 176 this->isValidData = true;
miguelcordero191 2:3d8d52e9751c 177
miguelcordero191 2:3d8d52e9751c 178 return 1;
miguelcordero191 2:3d8d52e9751c 179 }
miguelcordero191 2:3d8d52e9751c 180
miguelcordero191 2:3d8d52e9751c 181 return 0;
miguelcordero191 2:3d8d52e9751c 182
miguelcordero191 2:3d8d52e9751c 183 }
miguelcordero191 2:3d8d52e9751c 184
miguelcordero191 2:3d8d52e9751c 185 char IpData::getIdClass(){
miguelcordero191 2:3d8d52e9751c 186
miguelcordero191 2:3d8d52e9751c 187 if (not this->isValidData)
miguelcordero191 2:3d8d52e9751c 188 return 0;
miguelcordero191 2:3d8d52e9751c 189
miguelcordero191 2:3d8d52e9751c 190 return this->id_class;
miguelcordero191 2:3d8d52e9751c 191 }
miguelcordero191 2:3d8d52e9751c 192
miguelcordero191 2:3d8d52e9751c 193 char IpData::getIdDevice(){
miguelcordero191 2:3d8d52e9751c 194
miguelcordero191 2:3d8d52e9751c 195 if (not this->isValidData)
miguelcordero191 2:3d8d52e9751c 196 return 0;
miguelcordero191 2:3d8d52e9751c 197
miguelcordero191 2:3d8d52e9751c 198 return this->id_dev;
miguelcordero191 2:3d8d52e9751c 199 }
miguelcordero191 2:3d8d52e9751c 200
miguelcordero191 2:3d8d52e9751c 201 unsigned short IpData::getCmd(){
miguelcordero191 2:3d8d52e9751c 202
miguelcordero191 2:3d8d52e9751c 203 if (not this->isValidData)
miguelcordero191 2:3d8d52e9751c 204 return 0;
miguelcordero191 2:3d8d52e9751c 205
miguelcordero191 2:3d8d52e9751c 206 return this->cmd;
miguelcordero191 2:3d8d52e9751c 207 }
miguelcordero191 2:3d8d52e9751c 208
miguelcordero191 2:3d8d52e9751c 209 unsigned long IpData::getPayloadLen(){
miguelcordero191 2:3d8d52e9751c 210
miguelcordero191 2:3d8d52e9751c 211 if (not this->isValidData)
miguelcordero191 2:3d8d52e9751c 212 return 0;
miguelcordero191 2:3d8d52e9751c 213
miguelcordero191 2:3d8d52e9751c 214 return this->len_payload;
miguelcordero191 2:3d8d52e9751c 215 }
miguelcordero191 2:3d8d52e9751c 216
miguelcordero191 2:3d8d52e9751c 217 char* IpData::getPayload(){
miguelcordero191 2:3d8d52e9751c 218
miguelcordero191 2:3d8d52e9751c 219 if (not this->isValidData)
miguelcordero191 2:3d8d52e9751c 220 return NULL;
miguelcordero191 2:3d8d52e9751c 221
miguelcordero191 2:3d8d52e9751c 222 return this->payload;
miguelcordero191 4:de495ce256b8 223 }
miguelcordero191 2:3d8d52e9751c 224
miguelcordero191 2:3d8d52e9751c 225 char* IpData::getTxData(){
miguelcordero191 2:3d8d52e9751c 226
miguelcordero191 2:3d8d52e9751c 227 return this->tx_buff;
miguelcordero191 4:de495ce256b8 228 }
miguelcordero191 4:de495ce256b8 229
miguelcordero191 2:3d8d52e9751c 230 unsigned long IpData::getTxDataLen(){
miguelcordero191 2:3d8d52e9751c 231
miguelcordero191 2:3d8d52e9751c 232 return this->len_tx_buffer;
miguelcordero191 4:de495ce256b8 233 }
miguelcordero191 4:de495ce256b8 234
miguelcordero191 4:de495ce256b8 235 char* IpData::getNIData(unsigned short cmd){
miguelcordero191 4:de495ce256b8 236
miguelcordero191 4:de495ce256b8 237 char tx_data[5];
miguelcordero191 4:de495ce256b8 238
miguelcordero191 4:de495ce256b8 239 strcpy(tx_data, NI_PAYLOAD);
miguelcordero191 4:de495ce256b8 240
miguelcordero191 4:de495ce256b8 241 return this->encode(cmd, tx_data, NI_LEN);
miguelcordero191 4:de495ce256b8 242 }
miguelcordero191 4:de495ce256b8 243
miguelcordero191 4:de495ce256b8 244 unsigned long IpData::getNIDataLen(){
miguelcordero191 4:de495ce256b8 245
miguelcordero191 4:de495ce256b8 246 return this->len_tx_buffer;
miguelcordero191 4:de495ce256b8 247 }