Ad van der Weiden / Mbed 2 deprecated myBlueUSB

Test version of BlueUSB stack. Includes SDP and RFCOMM. As Client it allows to connect to my fischertechnik TX Controller. As Server it echo\\\\\\\'s characters to Putty. PIN=1234

Dependencies:   mbed myUSBHost AvailableMemory

Dependents:   mbed_TANK_Kinect myBlueUSB_ros ftusbClass

rfcomm/RFCOMM.cpp@13:327622e38551, 2011-07-01 (annotated)

Committer:
networker
Date:
Fri Jul 01 09:16:00 2011 +0000
Revision:
13:327622e38551
made some improvements to get massstorage functioning

Who changed what in which revision?

UserRevisionLine numberNew contents of line
networker 13:327622e38551 1 #include "mbed.h"
networker 13:327622e38551 2 #include "Utils.h"
networker 13:327622e38551 3 #include "RFCOMM.h"
networker 13:327622e38551 4
networker 13:327622e38551 5 // Control field values bit no. 1 2 3 4 5 6 7 8
networker 13:327622e38551 6 #define BT_RFCOMM_SABM 0x3F // 1 1 1 1 P/F 1 0 0
networker 13:327622e38551 7 #define BT_RFCOMM_UA 0x73 // 1 1 0 0 P/F 1 1 0
networker 13:327622e38551 8 #define BT_RFCOMM_DM 0x0F // 1 1 1 1 P/F 0 0 0
networker 13:327622e38551 9 #define BT_RFCOMM_DM_PF 0x1F
networker 13:327622e38551 10 #define BT_RFCOMM_DISC 0x53 // 1 1 0 0 P/F 0 1 0
networker 13:327622e38551 11 #define BT_RFCOMM_UIH 0xEF // 1 1 1 1 P/F 1 1 1
networker 13:327622e38551 12 #define BT_RFCOMM_UIH_PF 0xFF
networker 13:327622e38551 13
networker 13:327622e38551 14 // Multiplexer message types
networker 13:327622e38551 15 #define BT_RFCOMM_PN_CMD 0x83
networker 13:327622e38551 16 #define BT_RFCOMM_PN_RSP 0x81
networker 13:327622e38551 17 #define BT_RFCOMM_TEST_CMD 0x23
networker 13:327622e38551 18 #define BT_RFCOMM_TEST_RSP 0x21
networker 13:327622e38551 19 #define BT_RFCOMM_FCON_CMD 0xA3
networker 13:327622e38551 20 #define BT_RFCOMM_FCON_RSP 0xA1
networker 13:327622e38551 21 #define BT_RFCOMM_FCOFF_CMD 0x63
networker 13:327622e38551 22 #define BT_RFCOMM_FCOFF_RSP 0x61
networker 13:327622e38551 23 #define BT_RFCOMM_MSC_CMD 0xE3
networker 13:327622e38551 24 #define BT_RFCOMM_MSC_RSP 0xE1
networker 13:327622e38551 25 #define BT_RFCOMM_RPN_CMD 0x93
networker 13:327622e38551 26 #define BT_RFCOMM_RPN_RSP 0x91
networker 13:327622e38551 27 #define BT_RFCOMM_RLS_CMD 0x53
networker 13:327622e38551 28 #define BT_RFCOMM_RLS_RSP 0x51
networker 13:327622e38551 29 #define BT_RFCOMM_NSC_RSP 0x11
networker 13:327622e38551 30
networker 13:327622e38551 31 // FCS calc
networker 13:327622e38551 32 #define BT_RFCOMM_CODE_WORD 0xE0 // pol = x8+x2+x1+1
networker 13:327622e38551 33 #define BT_RFCOMM_CRC_CHECK_LEN 3
networker 13:327622e38551 34 #define BT_RFCOMM_UIHCRC_CHECK_LEN 2
networker 13:327622e38551 35
networker 13:327622e38551 36 #define NR_CREDITS 1
networker 13:327622e38551 37 #define INITIAL_CREDITS 1 //0...7
networker 13:327622e38551 38
networker 13:327622e38551 39 #define DCD (1<<7) //DV data carrier detect
networker 13:327622e38551 40 #define RI (1<<6) //IC ring indicator
networker 13:327622e38551 41 #define RTS (1<<3) //RTR request to send
networker 13:327622e38551 42 #define DSR (1<<2) //RTC data set ready
networker 13:327622e38551 43 #define FC (1<<1) //Flow Control
networker 13:327622e38551 44 #define EA (1<<0) //extended address (always 1)
networker 13:327622e38551 45 #define SIGNALS (DCD | RTS | DSR | EA)
networker 13:327622e38551 46
networker 13:327622e38551 47 #define DEBUG 1
networker 13:327622e38551 48 #define TAKE_INITIATIVE
networker 13:327622e38551 49
networker 13:327622e38551 50 RFCOMMManager rfcomm_manager;
networker 13:327622e38551 51
networker 13:327622e38551 52 //uint8_t rfcomm_out_buffer[1000];//seems a bit big as default max framesize is 127
networker 13:327622e38551 53 //unsigned rfcomm::maxframesize = MAX_FRAME_SIZE; //only initial value
networker 13:327622e38551 54
networker 13:327622e38551 55 //these functions are obtained from rfcomm.c on google code
networker 13:327622e38551 56 void _bt_rfcomm_send_sabm(unsigned short source_cid, unsigned char initiator, unsigned char channel);
networker 13:327622e38551 57 void _bt_rfcomm_send_uih_pn_command(unsigned short source_cid, unsigned char initiator, unsigned char channel, unsigned short max_frame_size);
networker 13:327622e38551 58 void _bt_rfcomm_send_uih_msc_cmd(unsigned short source_cid, unsigned char initiator, unsigned char channel, unsigned char signals);
networker 13:327622e38551 59 void _bt_rfcomm_send_uih_rpn_cmd(uint16_t source_cid, uint8_t initiator, uint8_t dlci, port_settings *val);
networker 13:327622e38551 60 int rfcomm_send_packet(unsigned short source_cid, unsigned char address, unsigned char control, unsigned char credits, const unsigned char *data, unsigned short len);
networker 13:327622e38551 61 uint8_t crc8_calc(uint8_t *data, uint16_t len);
networker 13:327622e38551 62
networker 13:327622e38551 63
networker 13:327622e38551 64 //find a free socket slot for channel ch
networker 13:327622e38551 65 int rfcomm::find_slot(unsigned ch) {
networker 13:327622e38551 66 for (int i = 0; i < MAX_RFCOMM_SCKTS; i++) {
networker 13:327622e38551 67 if (sckts[i] != 0) { //socket is in use
networker 13:327622e38551 68 RFCOMMSocket *s = (RFCOMMSocket*)GetSocketInternal(sckts[i]);
networker 13:327622e38551 69 if (s==0) {
networker 13:327622e38551 70 printf("find_slot: socket %d not found\n", sckts[i]);
networker 13:327622e38551 71 continue;
networker 13:327622e38551 72 }
networker 13:327622e38551 73 if (s->dlci >> 1 == ch) {
networker 13:327622e38551 74 printf("Channel %d is already in use on socket %d\n", ch, sckts[i]);
networker 13:327622e38551 75 return -1;
networker 13:327622e38551 76 }
networker 13:327622e38551 77 } else //slot is free
networker 13:327622e38551 78 return i;
networker 13:327622e38551 79 }
networker 13:327622e38551 80 return -2; //no free slots
networker 13:327622e38551 81 }
networker 13:327622e38551 82
networker 13:327622e38551 83 //find the rfcomm socket for dlci
networker 13:327622e38551 84 RFCOMMSocket* rfcomm::find_socket(unsigned dlci) {
networker 13:327622e38551 85 for (int i = 0; i < MAX_RFCOMM_SCKTS; i++) {
networker 13:327622e38551 86 if (sckts[i] != 0) { //socket is in use
networker 13:327622e38551 87 RFCOMMSocket *s = (RFCOMMSocket*)GetSocketInternal(sckts[i]);
networker 13:327622e38551 88 if (s==0) {
networker 13:327622e38551 89 printf("find_socket: socket %d not found\n", sckts[i]);
networker 13:327622e38551 90 continue;
networker 13:327622e38551 91 }
networker 13:327622e38551 92 if (s->dlci == dlci) {
networker 13:327622e38551 93 return s;
networker 13:327622e38551 94 }
networker 13:327622e38551 95 }
networker 13:327622e38551 96 }
networker 13:327622e38551 97 printf("RFCOMMSocket for dlci %d was not found!\n", dlci);
networker 13:327622e38551 98 return 0; //socket not found
networker 13:327622e38551 99 }
networker 13:327622e38551 100
networker 13:327622e38551 101 //send a PN command to all sockets waiting to be opened
networker 13:327622e38551 102 void rfcomm::initChannels(int socket) {
networker 13:327622e38551 103 for (int i = 0; i < MAX_RFCOMM_SCKTS; i++) {
networker 13:327622e38551 104 if (sckts[i] != 0) { //socket is in use
networker 13:327622e38551 105 RFCOMMSocket *s = (RFCOMMSocket*)GetSocketInternal(sckts[i]);
networker 13:327622e38551 106 if (s==0) {
networker 13:327622e38551 107 printf("initChannels: socket %d not found\n", sckts[i]);
networker 13:327622e38551 108 continue;
networker 13:327622e38551 109 }
networker 13:327622e38551 110 if (s->State == SocketState_Opening) {
networker 13:327622e38551 111 printf("Sending PN for DLCI %d on socket %d\n", s->dlci, sckts[i]);
networker 13:327622e38551 112 _bt_rfcomm_send_uih_pn_command(socket, 1, s->dlci, maxframesize);
networker 13:327622e38551 113 s->State = SocketState_L2CAP_Config_wait;
networker 13:327622e38551 114 }
networker 13:327622e38551 115 }
networker 13:327622e38551 116 }
networker 13:327622e38551 117 }
networker 13:327622e38551 118
networker 13:327622e38551 119 unsigned rfcomm::release_channel(unsigned dlci) {
networker 13:327622e38551 120 int n = 0;
networker 13:327622e38551 121 for (int i = 0; i < MAX_RFCOMM_SCKTS; i++) {
networker 13:327622e38551 122 if (sckts[i] != 0) { //socket is in use
networker 13:327622e38551 123 RFCOMMSocket *s = (RFCOMMSocket*)GetSocketInternal(sckts[i]);
networker 13:327622e38551 124 if (s==0) {
networker 13:327622e38551 125 printf("Release: socket for dlci %d not found\n", dlci);
networker 13:327622e38551 126 continue;
networker 13:327622e38551 127 }
networker 13:327622e38551 128 if (s->dlci == dlci)
networker 13:327622e38551 129 sckts[i] = 0;
networker 13:327622e38551 130 else
networker 13:327622e38551 131 n++;
networker 13:327622e38551 132 }
networker 13:327622e38551 133 }
networker 13:327622e38551 134 return n;
networker 13:327622e38551 135 }
networker 13:327622e38551 136
networker 13:327622e38551 137 int rfcomm::Send(SocketInternal *sock, const u8* data, int len) {//also see if credits need to be send
networker 13:327622e38551 138 RFCOMMSocket *s = (RFCOMMSocket*)sock;
networker 13:327622e38551 139 char credits = 0;
networker 13:327622e38551 140 char control = BT_RFCOMM_UIH;
networker 13:327622e38551 141 if (len + 14 > maxframesize) //hci/l2cap header =8, rfcomm header ~ 6
networker 13:327622e38551 142 printf("Error! packetsize = %d, maxframesize = %d\n", len, maxframesize);
networker 13:327622e38551 143 if (s->peer_credits == 0) {//peer is low on credits
networker 13:327622e38551 144 credits = NR_CREDITS;
networker 13:327622e38551 145 control = BT_RFCOMM_UIH_PF;
networker 13:327622e38551 146 s->peer_credits += NR_CREDITS;//so provide some more
networker 13:327622e38551 147 }
networker 13:327622e38551 148 unsigned char address = (1 << 0) | (initiator << 1) | (s->dlci << 2);
networker 13:327622e38551 149 if (s->my_credits) {
networker 13:327622e38551 150 s->my_credits--;
networker 13:327622e38551 151 return rfcomm_send_packet(_l2cap, address, control, credits, data, len);
networker 13:327622e38551 152 } else
networker 13:327622e38551 153 return rfcomm_send_packet(_l2cap, address, control, credits, data, 0);//send an empty packet when credits run out
networker 13:327622e38551 154 }
networker 13:327622e38551 155
networker 13:327622e38551 156 int rfcomm::Close(SocketInternal* sock) {
networker 13:327622e38551 157 RFCOMMSocket *s = (RFCOMMSocket*)sock;
networker 13:327622e38551 158 int id = s->dlci;
networker 13:327622e38551 159 printf("Closing rfcomm dlci %d state=%d\n", id, s->State);
networker 13:327622e38551 160 Disconnect(s);
networker 13:327622e38551 161 int n = release_channel(id);
networker 13:327622e38551 162 printf("%d channels are still open\n", n);
networker 13:327622e38551 163 if (n == 0) {//all rfcomm channels are closed
networker 13:327622e38551 164 printf("....L2CAP must be closed as well\n");
networker 13:327622e38551 165 rfcomm_send_packet(_l2cap, (1 << 0) | (initiator << 1), BT_RFCOMM_DISC, 0, 0, 0); //close dlci0
networker 13:327622e38551 166 Socket_Close(_l2cap);
networker 13:327622e38551 167 _l2cap = 0; //return rfcomm to the pool
networker 13:327622e38551 168 }
networker 13:327622e38551 169 return 0;
networker 13:327622e38551 170 }
networker 13:327622e38551 171
networker 13:327622e38551 172 int rfcomm::SetOpt(SocketInternal *sock, int so, int* data, int len) {
networker 13:327622e38551 173 switch (so) {
networker 13:327622e38551 174 case SO_RECBUF:
networker 13:327622e38551 175 case SO_SNDBUF:
networker 13:327622e38551 176 maxframesize = *data; //pointless because setting takes effect only before socket is opened (before PN)
networker 13:327622e38551 177 break;
networker 13:327622e38551 178 default: return NOPROTOOPT;
networker 13:327622e38551 179 }
networker 13:327622e38551 180 return 0;
networker 13:327622e38551 181 }
networker 13:327622e38551 182
networker 13:327622e38551 183 int rfcomm::GetOpt(SocketInternal *sock, int so, int* data, int len) {
networker 13:327622e38551 184 switch (so) {
networker 13:327622e38551 185 case SO_RECBUF:
networker 13:327622e38551 186 case SO_SNDBUF:
networker 13:327622e38551 187 if (len >= sizeof(int))
networker 13:327622e38551 188 *data = maxframesize;
networker 13:327622e38551 189 break;
networker 13:327622e38551 190 default: return NOPROTOOPT;
networker 13:327622e38551 191 }
networker 13:327622e38551 192 return 0;
networker 13:327622e38551 193 }
networker 13:327622e38551 194
networker 13:327622e38551 195 int rfcomm::Disconnect(RFCOMMSocket *s) {
networker 13:327622e38551 196 unsigned char address = (1 << 0) | (initiator << 1) | (s->dlci << 2);
networker 13:327622e38551 197 return rfcomm_send_packet(_l2cap, address, BT_RFCOMM_DISC, 0, 0, 0);
networker 13:327622e38551 198 }
networker 13:327622e38551 199
networker 13:327622e38551 200 //expect this to be called with socket type=SOCKET_RFCOM and addr->psm = channel and addr->bdaddr is the BT addr
networker 13:327622e38551 201 //of the device to connect to.
networker 13:327622e38551 202 //eg. Socket_Open(SOCKET_RFCOM, rfcommaddr(bdaddr, chan), receiver_func, appl_obj);
networker 13:327622e38551 203 int rfcomm::Open(SocketInternal* sock, SocketAddrHdr* addr) {
networker 13:327622e38551 204 int ch = ((L2CAPAddr*)addr)->psm;//abused psm for channel ID
networker 13:327622e38551 205 RFCOMMSocket *s = (RFCOMMSocket*)sock;
networker 13:327622e38551 206 int slot = find_slot(ch);
networker 13:327622e38551 207 if (slot < 0) return 0;
networker 13:327622e38551 208 sckts[slot] = s->ID;
networker 13:327622e38551 209 s->serdevice = this;
networker 13:327622e38551 210 s->State = SocketState_Opening;
networker 13:327622e38551 211
networker 13:327622e38551 212 if (_l2cap == 0) { //no rfcomm -> l2cap connection yet
networker 13:327622e38551 213 printf("Need to open L2CAP channel first before opening RFCOMM channel %d\n", s->dlci);
networker 13:327622e38551 214 ((L2CAPAddr*)addr)->psm = L2CAP_PSM_RFCOMM;//open the l2cap channel and the rfcomm_ch channel
networker 13:327622e38551 215 initiator = 1;
networker 13:327622e38551 216 s->dlci = (ch<<1)|!initiator;
networker 13:327622e38551 217 _l2cap = Socket_Open(SOCKET_L2CAP, addr, OnRfCommControl, this);//this is the socket between the RFCOMM and the L2CAP layer
networker 13:327622e38551 218 if (_l2cap)
networker 13:327622e38551 219 printf("Successfully opened L2CAP channel on socket %d\n", _l2cap);
networker 13:327622e38551 220 else {
networker 13:327622e38551 221 printf("Opening L2CAP channel failed\n");
networker 13:327622e38551 222 sckts[slot] = 0;
networker 13:327622e38551 223 s->State = SocketState_Closed;
networker 13:327622e38551 224 return 0;
networker 13:327622e38551 225 }
networker 13:327622e38551 226 } else {//bypass the l2cap channel creation
networker 13:327622e38551 227 s->dlci = (ch<<1)|!initiator;
networker 13:327622e38551 228 _bt_rfcomm_send_uih_pn_command(_l2cap, initiator, s->dlci, maxframesize);
networker 13:327622e38551 229 s->State = SocketState_L2CAP_Config_wait;
networker 13:327622e38551 230 }
networker 13:327622e38551 231 return s->ID; //return the application unique socket nr.
networker 13:327622e38551 232 }
networker 13:327622e38551 233
networker 13:327622e38551 234 int rfcomm::set_remote_port_parameters(unsigned char dlci, port_settings *p) {
networker 13:327622e38551 235 _bt_rfcomm_send_uih_rpn_cmd(_l2cap, initiator, dlci, p);
networker 13:327622e38551 236 return 0;
networker 13:327622e38551 237 }
networker 13:327622e38551 238
networker 13:327622e38551 239 //socket is an L2CAP socket and state is the state of the L2CAP socket, not the RFCOMM socket
networker 13:327622e38551 240 void rfcomm::OnRfCommControl(int socket, SocketState state, const u8* data, int len, void* userData) {
networker 13:327622e38551 241 int packet_processed = 0;
networker 13:327622e38551 242 rfcomm* self = (rfcomm*)userData;
networker 13:327622e38551 243 const u8 initiator = self->initiator;
networker 13:327622e38551 244 printf("\x1B[%dm", 32); //debug: set a different colour
networker 13:327622e38551 245 printf("OnRfCommControl sock = %d, state = %d, length = %d\n", socket, state, len);
networker 13:327622e38551 246
networker 13:327622e38551 247 if (len == 0) {//client only
networker 13:327622e38551 248 if (state==SocketState_Open) {//callback after change to 'open', the rfcomm->l2cap channel is now open
networker 13:327622e38551 249 _bt_rfcomm_send_sabm(socket, initiator, 0); //setup the rfcomm control channel dlci==0
networker 13:327622e38551 250 return;
networker 13:327622e38551 251 }
networker 13:327622e38551 252 return; //or other states to handle, e.g. Closing or Closed
networker 13:327622e38551 253 }
networker 13:327622e38551 254 //we have data, so parse the header
networker 13:327622e38551 255 const u8 &addr = data[0];
networker 13:327622e38551 256 u8 dlci = addr>>2;
networker 13:327622e38551 257 const u8 &control = data[1];
networker 13:327622e38551 258 u16 length = data[2]>>1;
networker 13:327622e38551 259 const u8 *payload = data+3;
networker 13:327622e38551 260 const u8 *pFCS = data+len-1; //expected position of the CRC
networker 13:327622e38551 261 if (!(data[2]&1)) { //two byte length
networker 13:327622e38551 262 length += ((unsigned)data[3])<<7;
networker 13:327622e38551 263 payload++;
networker 13:327622e38551 264 }
networker 13:327622e38551 265 u8 credits = 0;
networker 13:327622e38551 266 if (control == BT_RFCOMM_UIH_PF)//this packet carries credits
networker 13:327622e38551 267 credits = *(payload++);
networker 13:327622e38551 268 //sanity check
networker 13:327622e38551 269 if (payload+length != pFCS)
networker 13:327622e38551 270 printf("RFCOMM size mismatch, expected %d payload bytes, got %d\n", length, pFCS-payload);
networker 13:327622e38551 271
networker 13:327622e38551 272 if (DEBUG) {
networker 13:327622e38551 273 printf("RFCOMM: EA=%d, C/R=%d, D=%d, ch=%d; control=%02X (P/F=%d); length=%d\n", addr&1, (addr>>1)&1, (addr>>2)&1, (addr>>3), control, (control>>4)&1, length);
networker 13:327622e38551 274 printfBytes("payload:", payload, length);
networker 13:327622e38551 275 }
networker 13:327622e38551 276 if (dlci == 0) { //dlci==0 control channel
networker 13:327622e38551 277 L2CAPSocket *s = (L2CAPSocket*)GetSocketInternal(socket);
networker 13:327622e38551 278 switch (control) {
networker 13:327622e38551 279 case BT_RFCOMM_UA:// received 1. message BT_RF_COMM_UA
networker 13:327622e38551 280 packet_processed++;
networker 13:327622e38551 281 if (s->si.State == SocketState_Closing || s->si.State==SocketState_L2CAP_WaitDisconnect) { //Confirmation of disconnect
networker 13:327622e38551 282 printf("Remote side confirmed disconnect for socket %d\n", s->si.ID);
networker 13:327622e38551 283 s->si.SetState(SocketState_Closed);
networker 13:327622e38551 284 break;
networker 13:327622e38551 285 }
networker 13:327622e38551 286 printf("Received RFCOMM unnumbered acknowledgement for channel 0 - multiplexer working\n");
networker 13:327622e38551 287 printf("Sending UIH Parameter Negotiation Command from OnRfCommControl\n");
networker 13:327622e38551 288 self->initChannels(socket);
networker 13:327622e38551 289 break;
networker 13:327622e38551 290 case BT_RFCOMM_UIH:// received UIH Parameter Negotiation Response
networker 13:327622e38551 291 switch (payload[0]) {
networker 13:327622e38551 292 case BT_RFCOMM_PN_RSP: {//client
networker 13:327622e38551 293 packet_processed++;
networker 13:327622e38551 294 printf("UIH Parameter Negotiation Response\n");
networker 13:327622e38551 295 printf("Sending SABM #%u\n", payload[2]);
networker 13:327622e38551 296 _bt_rfcomm_send_sabm(socket, initiator, payload[2]);//was rfcomm_ch
networker 13:327622e38551 297 RFCOMMSocket *r = self->find_socket(payload[2]);
networker 13:327622e38551 298 if (r==0) break;
networker 13:327622e38551 299 r->my_credits = payload[9]; //initial amount of credits
networker 13:327622e38551 300 self->maxframesize = min(self->maxframesize, payload[6] + (payload[7]<<8));
networker 13:327622e38551 301 printf("Max Frame Size = %d, got %d initial credits\n", self->maxframesize, payload[9]);
networker 13:327622e38551 302 }
networker 13:327622e38551 303 break;
networker 13:327622e38551 304 case BT_RFCOMM_PN_CMD: { //remote side sent PN command, mtu and initial credits
networker 13:327622e38551 305 packet_processed++;
networker 13:327622e38551 306 printf("UIH Parameter Negotiation Indication\n");
networker 13:327622e38551 307 self->maxframesize = min(self->maxframesize, payload[6] + (payload[7]<<8));
networker 13:327622e38551 308 unsigned char cred = payload[9] & 7;
networker 13:327622e38551 309 unsigned char _dlci = payload[2];
networker 13:327622e38551 310
networker 13:327622e38551 311 int skt = rfcomm_manager.find_socket(_dlci>>1);
networker 13:327622e38551 312 if (skt == 0) { //No-one is listening
networker 13:327622e38551 313 printf("No-one is Listening on channel %d\n", _dlci>>1);
networker 13:327622e38551 314 rfcomm_send_packet(socket, (_dlci<<2)|1, BT_RFCOMM_DM, 0, 0, 0);
networker 13:327622e38551 315 break;
networker 13:327622e38551 316 }
networker 13:327622e38551 317 RFCOMMSocket *r = (RFCOMMSocket*)GetSocketInternal(skt);
networker 13:327622e38551 318 r->my_credits = cred;
networker 13:327622e38551 319 r->peer_credits = INITIAL_CREDITS;
networker 13:327622e38551 320 unsigned char reply[10];
networker 13:327622e38551 321 memcpy(reply, payload, sizeof(reply));
networker 13:327622e38551 322 reply[0] = BT_RFCOMM_PN_RSP;//[1]=len, [2]=dlci, [4]=priority, [5]=timer(must be 0), [8] retransmissions (must be 0)
networker 13:327622e38551 323 reply[3] = payload[3]==0xF0 ? 0xE0 : 0; //support credit based flow control
networker 13:327622e38551 324 reply[6] = self->maxframesize;
networker 13:327622e38551 325 reply[7] = self->maxframesize>>8;
networker 13:327622e38551 326 reply[9] = payload[3]==0xF0 ? r->peer_credits : 0;
networker 13:327622e38551 327 printf("Max Frame Size = %d, give %d initial credits\n", self->maxframesize, reply[9]);
networker 13:327622e38551 328 rfcomm_send_packet(socket, addr^2, BT_RFCOMM_UIH, 0, reply, sizeof(reply));
networker 13:327622e38551 329 }
networker 13:327622e38551 330 break;
networker 13:327622e38551 331 case BT_RFCOMM_MSC_CMD:
networker 13:327622e38551 332 packet_processed++;
networker 13:327622e38551 333 {
networker 13:327622e38551 334 printf("Received BT_RFCOMM_MSC_IND\n");
networker 13:327622e38551 335 // fine with this, return the same status and ignore the value, there is no room in the socket to store the value, rfcomm could generate an event
networker 13:327622e38551 336 RFCOMMSocket *r = self->find_socket(payload[2]>>2);
networker 13:327622e38551 337 if (r==0) break;
networker 13:327622e38551 338 unsigned char reply[5];
networker 13:327622e38551 339 memcpy(reply, payload, 5); //keep length, dlci and value(s)
networker 13:327622e38551 340 reply[0] = BT_RFCOMM_MSC_RSP; // change command into response
networker 13:327622e38551 341 printf("Sending MSC_RSP (%d bytes)\n", length);
networker 13:327622e38551 342 rfcomm_send_packet(socket, addr^2, BT_RFCOMM_UIH, 0, reply, (payload[1]>>1)+2); // reply is 4 or 5 bytes
networker 13:327622e38551 343 switch (r->State) {
networker 13:327622e38551 344 case SocketState_L2CAP_Config_wait:
networker 13:327622e38551 345 r->State = SocketState_L2CAP_Config_wait_send;
networker 13:327622e38551 346 printf("Sending MSC_CMD\n");
networker 13:327622e38551 347 _bt_rfcomm_send_uih_msc_cmd(socket, initiator, payload[2]>>2, SIGNALS); // ea=1,fc=0,rtc(DSR/DTR)=1,rtr(RTS/CTs)=1,ic(RI)=0,dv(DCD)=1
networker 13:327622e38551 348 r->State = SocketState_L2CAP_Config_wait_rsp;
networker 13:327622e38551 349 break;
networker 13:327622e38551 350 case SocketState_L2CAP_Config_wait_reqrsp:
networker 13:327622e38551 351 r->State = SocketState_L2CAP_Config_wait_rsp;
networker 13:327622e38551 352 break;
networker 13:327622e38551 353 case SocketState_L2CAP_Config_wait_req:
networker 13:327622e38551 354 r->SetState(SocketState_Open);
networker 13:327622e38551 355 break;
networker 13:327622e38551 356 case SocketState_Open:
networker 13:327622e38551 357 //inform port adaptation layer
networker 13:327622e38551 358 printf("Received MSC IND in state Open for dlci 0x%02x\n", payload[2]>>2);
networker 13:327622e38551 359 break;
networker 13:327622e38551 360 default:
networker 13:327622e38551 361 printf("Received MSC IND in state %d for dlci 0x%02x\n", r->State, payload[2]>>2);
networker 13:327622e38551 362 }
networker 13:327622e38551 363 }
networker 13:327622e38551 364 break;
networker 13:327622e38551 365 case BT_RFCOMM_MSC_RSP:
networker 13:327622e38551 366 packet_processed++;
networker 13:327622e38551 367 {
networker 13:327622e38551 368 RFCOMMSocket *r = self->find_socket(payload[2]>>2);
networker 13:327622e38551 369 if (r==0) break;
networker 13:327622e38551 370 if (r->State == SocketState_L2CAP_Config_wait_reqrsp)
networker 13:327622e38551 371 r->State = SocketState_L2CAP_Config_wait_req;
networker 13:327622e38551 372 else if (r->State == SocketState_L2CAP_Config_wait_rsp)
networker 13:327622e38551 373 r->SetState(SocketState_Open);
networker 13:327622e38551 374 else
networker 13:327622e38551 375 printf("Received MSC confirmation in state %d for dlci 0x%02x\n", r->State, payload[2]>>2);
networker 13:327622e38551 376 }
networker 13:327622e38551 377 break;
networker 13:327622e38551 378 case BT_RFCOMM_RPN_CMD:
networker 13:327622e38551 379 packet_processed++;
networker 13:327622e38551 380 //accept and ignore all settings
networker 13:327622e38551 381 unsigned char reply[10];
networker 13:327622e38551 382 memcpy(reply, payload, length); //keep length, dlci and value(s)
networker 13:327622e38551 383 reply[0] = BT_RFCOMM_RPN_RSP; // change command into response
networker 13:327622e38551 384 printf("Responding to RPN indication (%d bytes)\n", length);
networker 13:327622e38551 385 rfcomm_send_packet(socket, addr^2, BT_RFCOMM_UIH, 0, reply, length);
networker 13:327622e38551 386 break;
networker 13:327622e38551 387 case BT_RFCOMM_RPN_RSP:
networker 13:327622e38551 388 packet_processed++;
networker 13:327622e38551 389 //ignore a response
networker 13:327622e38551 390 printf("Received RPN confirmation\n");
networker 13:327622e38551 391 break;
networker 13:327622e38551 392 default:
networker 13:327622e38551 393 printf("Unsupported multiplexer frame, type=%02XH\n", data[3]);
networker 13:327622e38551 394 }
networker 13:327622e38551 395 break;
networker 13:327622e38551 396 case BT_RFCOMM_DISC:
networker 13:327622e38551 397 printf("Remote site actively disconnected from DLCI0\n");
networker 13:327622e38551 398 rfcomm_send_packet(socket, addr|2, BT_RFCOMM_UA, 0, 0, 0);//confirm disconnection
networker 13:327622e38551 399 //intentional fall through
networker 13:327622e38551 400 case BT_RFCOMM_DM:
networker 13:327622e38551 401 packet_processed++;
networker 13:327622e38551 402 printf("Remote side refused connection on DLCI0\n");
networker 13:327622e38551 403 self->_l2cap = Socket_Close(socket);
networker 13:327622e38551 404 break;
networker 13:327622e38551 405 case BT_RFCOMM_SABM:
networker 13:327622e38551 406 packet_processed++;
networker 13:327622e38551 407 printf("Remote site is seeking connection on DLCI0\n"); //respond with UA
networker 13:327622e38551 408 rfcomm_send_packet(socket, addr|2, BT_RFCOMM_UA, 0, 0, 0);//confirm connection
networker 13:327622e38551 409 break;
networker 13:327622e38551 410 default:
networker 13:327622e38551 411 printf("Unexpected RFCOMM cmd %02XH for address %02XH, length=%d\n", control, addr, length);
networker 13:327622e38551 412 }
networker 13:327622e38551 413 } else { //data is for one of the serial sockets
networker 13:327622e38551 414 RFCOMMSocket *s = 0;
networker 13:327622e38551 415 if (control == BT_RFCOMM_SABM) { //req. for conn on this dlci
networker 13:327622e38551 416 //cannot call self->rfcomm::find_socket because it has no socket yet
networker 13:327622e38551 417 int skt = rfcomm_manager.find_socket(dlci>>1); //find the server socket
networker 13:327622e38551 418 s = (RFCOMMSocket*)GetSocketInternal(skt);//the listening socket
networker 13:327622e38551 419 if (s) {//move the listening socket to the appropriate rfcomm
networker 13:327622e38551 420 int slot = self->find_slot(dlci>>1);
networker 13:327622e38551 421 if (slot < 0) {
networker 13:327622e38551 422 printf("RFCOMM Channel %d is not free on rfcomm with l2cap socket %d\n", dlci>>1, self->_l2cap);
networker 13:327622e38551 423 return;
networker 13:327622e38551 424 }
networker 13:327622e38551 425 s->serdevice = self; //bind the socket to this refcomm entity
networker 13:327622e38551 426 self->sckts[slot] = skt;
networker 13:327622e38551 427 rfcomm_manager.remove_socket(skt);
networker 13:327622e38551 428 } else {
networker 13:327622e38551 429 printf("Couln't find a listening socket for dlci %d\n", dlci);
networker 13:327622e38551 430 return;
networker 13:327622e38551 431 }
networker 13:327622e38551 432 } else
networker 13:327622e38551 433 s = self->find_socket(dlci);
networker 13:327622e38551 434 if (s==0){
networker 13:327622e38551 435 printf("DLCI %d not found\n", dlci);
networker 13:327622e38551 436 return;
networker 13:327622e38551 437 }
networker 13:327622e38551 438 switch (control) {
networker 13:327622e38551 439 case BT_RFCOMM_SABM:
networker 13:327622e38551 440 packet_processed++;
networker 13:327622e38551 441 rfcomm_send_packet(socket, addr|2, BT_RFCOMM_UA, 0, 0, 0);//confirm connection
networker 13:327622e38551 442 s->State = SocketState_L2CAP_Config_wait; //wait for msc cmd
networker 13:327622e38551 443 #ifdef TAKE_INITIATIVE
networker 13:327622e38551 444 printf("Sending MSC_CMD\n");
networker 13:327622e38551 445 _bt_rfcomm_send_uih_msc_cmd(socket, initiator, dlci, 0x8d); // ea=1,fc=0,rtc(DSR/DTR)=1,rtr(RTS/CTs)=1,ic(RI)=0,dv(DCD)=1
networker 13:327622e38551 446 s->State = SocketState_L2CAP_Config_wait_reqrsp;
networker 13:327622e38551 447 #endif
networker 13:327622e38551 448 break;
networker 13:327622e38551 449 case BT_RFCOMM_UA:// received 2. message BT_RF_COMM_UA
networker 13:327622e38551 450 packet_processed++;
networker 13:327622e38551 451 if (s->State == SocketState_Closing) { //Confirmation of disconnect
networker 13:327622e38551 452 printf("Remote side confirmed disconnect for socket %d\n", s->ID);
networker 13:327622e38551 453 s->SetState(SocketState_Closed);
networker 13:327622e38551 454 break;
networker 13:327622e38551 455 }
networker 13:327622e38551 456 printf("Received RFCOMM unnumbered acknowledgement for dlci %u - channel opened\n", dlci);
networker 13:327622e38551 457 if (s->State == SocketState_L2CAP_Config_wait) {
networker 13:327622e38551 458 printf("Sending MSC CMD\n");
networker 13:327622e38551 459 _bt_rfcomm_send_uih_msc_cmd(socket, initiator, dlci, 0x8d); // ea=1,fc=0,rtc(DSR/DTR)=1,rtr(RTS/CTs)=1,ic(RI)=0,dv(DCD)=1
networker 13:327622e38551 460 s->State = SocketState_L2CAP_Config_wait_reqrsp;
networker 13:327622e38551 461 }
networker 13:327622e38551 462 break;
networker 13:327622e38551 463 case BT_RFCOMM_UIH_PF: //user data with credits
networker 13:327622e38551 464 printf("Got %u credits\n", credits);
networker 13:327622e38551 465 s->my_credits += credits;
networker 13:327622e38551 466 //intentional fall-through
networker 13:327622e38551 467 case BT_RFCOMM_UIH: //user data
networker 13:327622e38551 468 packet_processed++;
networker 13:327622e38551 469 if (DEBUG) {
networker 13:327622e38551 470 printf("RX: address %02x, control %02x: ", addr, control);
networker 13:327622e38551 471 printHex( payload, length);
networker 13:327622e38551 472 }
networker 13:327622e38551 473 if (length) {
networker 13:327622e38551 474 s->peer_credits--;
networker 13:327622e38551 475 s->Recv(payload, length);
networker 13:327622e38551 476 } else
networker 13:327622e38551 477 printf("Received empty packet\n");
networker 13:327622e38551 478 if (length == 0 || s->peer_credits == 0) {//send credits when peer runs out
networker 13:327622e38551 479 //char ini = !(dlci & 1);
networker 13:327622e38551 480 unsigned char address = (1 << 0) | (initiator << 1) | (dlci << 2);
networker 13:327622e38551 481 printf("send %d credits to dlci %d\n", NR_CREDITS, addr>>2);
networker 13:327622e38551 482 rfcomm_send_packet(socket, address, BT_RFCOMM_UIH_PF, NR_CREDITS, NULL, 0);
networker 13:327622e38551 483 s->peer_credits += NR_CREDITS;
networker 13:327622e38551 484 }
networker 13:327622e38551 485 break;
networker 13:327622e38551 486 case BT_RFCOMM_DISC:
networker 13:327622e38551 487 packet_processed++;
networker 13:327622e38551 488 printf("Received DISC IND for dlci %d\n", dlci);
networker 13:327622e38551 489 rfcomm_send_packet(socket, addr, BT_RFCOMM_UA, 0, 0, 0);//confirm disconnection
networker 13:327622e38551 490 s->SetState(SocketState_Closed);
networker 13:327622e38551 491 break;
networker 13:327622e38551 492 case BT_RFCOMM_DM:
networker 13:327622e38551 493 case BT_RFCOMM_DM_PF:
networker 13:327622e38551 494 packet_processed++;
networker 13:327622e38551 495 printf("Received DM IND (%02X) for dlci %d\n", control, dlci);
networker 13:327622e38551 496 s->SetState(SocketState_Closed);
networker 13:327622e38551 497 break;
networker 13:327622e38551 498 default:
networker 13:327622e38551 499 printf("Unexpected RFCOMM cmd %02XH for address %02XH, length=%d\n", control, addr, length);
networker 13:327622e38551 500 }
networker 13:327622e38551 501 }
networker 13:327622e38551 502
networker 13:327622e38551 503 if (!packet_processed) {
networker 13:327622e38551 504 // just dump data for now
networker 13:327622e38551 505 printf("??: address %02x, control %02x: ", data[0], data[1]);
networker 13:327622e38551 506 printHex( data, len );
networker 13:327622e38551 507 }
networker 13:327622e38551 508 printf("\x1B[%dm", 0);//reset terminal colour
networker 13:327622e38551 509 }
networker 13:327622e38551 510
networker 13:327622e38551 511 //should make the functions below member functions
networker 13:327622e38551 512
networker 13:327622e38551 513 /**
networker 13:327622e38551 514 * @param credits - only used for RFCOMM flow control in UIH wiht P/F = 1
networker 13:327622e38551 515 */
networker 13:327622e38551 516 /* Questionable optimisation. When OFFSET==8 a buffer is (dynamically) allocated that provides space for the lower
networker 13:327622e38551 517 layer headers, this reduces copying to, and allocation of, a lower layer buffer. However, all other layers using
networker 13:327622e38551 518 HCI/L2CAP must do the same.
networker 13:327622e38551 519 */
networker 13:327622e38551 520 #define OFFSET 8
networker 13:327622e38551 521
networker 13:327622e38551 522 int rfcomm_send_packet(uint16_t source_cid, uint8_t address, uint8_t control, uint8_t credits, const uint8_t *data, uint16_t len) {
networker 13:327622e38551 523
networker 13:327622e38551 524 uint16_t pos = OFFSET;
networker 13:327622e38551 525 uint8_t crc_fields = 3;
networker 13:327622e38551 526
networker 13:327622e38551 527 #if OFFSET == 8
networker 13:327622e38551 528 uint8_t* rfcomm_out_buffer = new uint8_t[OFFSET+len+6];
networker 13:327622e38551 529 #else
networker 13:327622e38551 530 static uint8_t rfcomm_out_buffer[MAXFRAMESIZE+6];//seems a bit big as default max framesize is 127
networker 13:327622e38551 531 #endif
networker 13:327622e38551 532 rfcomm_out_buffer[pos++] = address;
networker 13:327622e38551 533 rfcomm_out_buffer[pos++] = control;
networker 13:327622e38551 534
networker 13:327622e38551 535 // length field can be 1 or 2 octets
networker 13:327622e38551 536 if (len < 128) {
networker 13:327622e38551 537 rfcomm_out_buffer[pos++] = (len << 1)| 1; // bits 0-6
networker 13:327622e38551 538 } else {
networker 13:327622e38551 539 rfcomm_out_buffer[pos++] = (len & 0x7f) << 1; // bits 0-6
networker 13:327622e38551 540 rfcomm_out_buffer[pos++] = len >> 7; // bits 7-14
networker 13:327622e38551 541 crc_fields++;
networker 13:327622e38551 542 }
networker 13:327622e38551 543
networker 13:327622e38551 544 // add credits for UIH frames when PF bit is set
networker 13:327622e38551 545 if (control == BT_RFCOMM_UIH_PF) {
networker 13:327622e38551 546 rfcomm_out_buffer[pos++] = credits;
networker 13:327622e38551 547 }
networker 13:327622e38551 548
networker 13:327622e38551 549 // copy actual data
networker 13:327622e38551 550 memcpy(&rfcomm_out_buffer[pos], data, len);
networker 13:327622e38551 551 pos += len;
networker 13:327622e38551 552
networker 13:327622e38551 553 // UIH frames only calc FCS over address + control (5.1.1)
networker 13:327622e38551 554 if ((control & 0xef) == BT_RFCOMM_UIH) {
networker 13:327622e38551 555 crc_fields = 2;
networker 13:327622e38551 556 }
networker 13:327622e38551 557 rfcomm_out_buffer[pos++] = crc8_calc(rfcomm_out_buffer+OFFSET, crc_fields); // calc fcs
networker 13:327622e38551 558 int retval = Socket_Send( source_cid, rfcomm_out_buffer, pos);
networker 13:327622e38551 559 #if OFFSET == 8
networker 13:327622e38551 560 delete[] rfcomm_out_buffer;
networker 13:327622e38551 561 #endif
networker 13:327622e38551 562 if (retval <= 0)
networker 13:327622e38551 563 return retval;
networker 13:327622e38551 564 return len;//return the size of the payload
networker 13:327622e38551 565 }
networker 13:327622e38551 566
networker 13:327622e38551 567 void _bt_rfcomm_send_sabm(uint16_t source_cid, uint8_t initiator, uint8_t dlci) {
networker 13:327622e38551 568 uint8_t address = (1 << 0) | (initiator << 1) | (dlci << 2);
networker 13:327622e38551 569 rfcomm_send_packet(source_cid, address, BT_RFCOMM_SABM, 0, NULL, 0);
networker 13:327622e38551 570 }
networker 13:327622e38551 571
networker 13:327622e38551 572 void _bt_rfcomm_send_uih_pn_command(uint16_t source_cid, uint8_t initiator, uint8_t dlci, uint16_t max_frame_size) {
networker 13:327622e38551 573 uint8_t payload[10];
networker 13:327622e38551 574 uint8_t address = (1 << 0) | (initiator << 1); // EA and C/R bit set - always server channel 0
networker 13:327622e38551 575 uint8_t pos = 0;
networker 13:327622e38551 576 payload[pos++] = BT_RFCOMM_PN_CMD;
networker 13:327622e38551 577 payload[pos++] = 8 << 1 | 1; // len
networker 13:327622e38551 578 payload[pos++] = dlci;
networker 13:327622e38551 579 payload[pos++] = 0xf0; // pre defined for Bluetooth, see 5.5.3 of TS 07.10 Adaption for RFCOMM
networker 13:327622e38551 580 payload[pos++] = 0; // priority
networker 13:327622e38551 581 payload[pos++] = 0; // max 60 seconds ack
networker 13:327622e38551 582 payload[pos++] = max_frame_size & 0xff; // max framesize low
networker 13:327622e38551 583 payload[pos++] = max_frame_size >> 8; // max framesize high
networker 13:327622e38551 584 payload[pos++] = 0x00; // number of retransmissions
networker 13:327622e38551 585 payload[pos++] = INITIAL_CREDITS; // unused error recovery window
networker 13:327622e38551 586 rfcomm_send_packet(source_cid, address, BT_RFCOMM_UIH, 0, (uint8_t *) payload, pos);
networker 13:327622e38551 587 }
networker 13:327622e38551 588
networker 13:327622e38551 589 void _bt_rfcomm_send_uih_data(uint16_t source_cid, uint8_t initiator, uint8_t channel, uint8_t *data, uint16_t len) {
networker 13:327622e38551 590 uint8_t address = (1 << 0) | (initiator << 1) | (!initiator << 2) | (channel << 3);
networker 13:327622e38551 591 rfcomm_send_packet(source_cid, address, BT_RFCOMM_UIH, 0, data, len);
networker 13:327622e38551 592 }
networker 13:327622e38551 593
networker 13:327622e38551 594 void _bt_rfcomm_send_uih_msc_cmd(uint16_t source_cid, uint8_t initiator, uint8_t dlci, uint8_t signals) {
networker 13:327622e38551 595 uint8_t address = (1 << 0) | (initiator << 1); // EA and C/R bit set - always server channel 0
networker 13:327622e38551 596 uint8_t payload[5];
networker 13:327622e38551 597 uint8_t pos = 0;
networker 13:327622e38551 598 payload[pos++] = BT_RFCOMM_MSC_CMD;
networker 13:327622e38551 599 payload[pos++] = 2 << 1 | 1; // len, should be adapted when adding break byte
networker 13:327622e38551 600 payload[pos++] = (1 << 0) | (1 << 1) | (dlci << 2); //C/R is always 1
networker 13:327622e38551 601 payload[pos++] = signals;
networker 13:327622e38551 602 // payload[pos++] = brk;
networker 13:327622e38551 603 rfcomm_send_packet(source_cid, address, BT_RFCOMM_UIH, 0, (uint8_t *) payload, pos);
networker 13:327622e38551 604 }
networker 13:327622e38551 605
networker 13:327622e38551 606 void _bt_rfcomm_send_uih_rpn_cmd(uint16_t source_cid, uint8_t initiator, uint8_t dlci, port_settings *val) {
networker 13:327622e38551 607 uint8_t address = (1 << 0) | (initiator << 1); // EA and C/R bit set - always server channel 0
networker 13:327622e38551 608 uint8_t payload[sizeof(port_settings)+3];
networker 13:327622e38551 609 uint8_t pos = 0;
networker 13:327622e38551 610 payload[pos++] = BT_RFCOMM_RPN_CMD;//type
networker 13:327622e38551 611 if (val) {
networker 13:327622e38551 612 payload[pos++] = ((1+sizeof(port_settings)) << 1) | 1; // len
networker 13:327622e38551 613 payload[pos++] = (1 << 0) | (1 << 1) | (dlci << 2);
networker 13:327622e38551 614 memcpy(payload+pos, (char*)val, sizeof(port_settings));
networker 13:327622e38551 615 pos += sizeof(port_settings);
networker 13:327622e38551 616 } else {
networker 13:327622e38551 617 payload[pos++] = (1 << 1) | 1; // len
networker 13:327622e38551 618 payload[pos++] = (1 << 0) | (1 << 1) | (dlci << 2);
networker 13:327622e38551 619 }
networker 13:327622e38551 620 rfcomm_send_packet(source_cid, address, BT_RFCOMM_UIH, 0, (uint8_t *) payload, pos);
networker 13:327622e38551 621 }
networker 13:327622e38551 622
networker 13:327622e38551 623 int set_remote_port_parameters(int socket, port_settings *p) {
networker 13:327622e38551 624 RFCOMMSocket* si = (RFCOMMSocket*)GetSocketInternal(socket);//gets the RFCOMM socket
networker 13:327622e38551 625 if (!si || si->ID != socket)
networker 13:327622e38551 626 return ERR_SOCKET_NOT_FOUND;
networker 13:327622e38551 627 return si->serdevice->set_remote_port_parameters(si->dlci, p);
networker 13:327622e38551 628 }
networker 13:327622e38551 629
networker 13:327622e38551 630
networker 13:327622e38551 631 /*
networker 13:327622e38551 632 * CRC (reversed crc) lookup table as calculated by the table generator in ETSI TS 101 369 V6.3.0.
networker 13:327622e38551 633 */
networker 13:327622e38551 634 static const uint8_t crc8table[256] = { /* reversed, 8-bit, poly=0x07 */
networker 13:327622e38551 635 0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75, 0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
networker 13:327622e38551 636 0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69, 0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
networker 13:327622e38551 637 0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D, 0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
networker 13:327622e38551 638 0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51, 0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
networker 13:327622e38551 639 0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05, 0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
networker 13:327622e38551 640 0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19, 0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
networker 13:327622e38551 641 0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D, 0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
networker 13:327622e38551 642 0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21, 0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
networker 13:327622e38551 643 0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95, 0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
networker 13:327622e38551 644 0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89, 0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
networker 13:327622e38551 645 0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD, 0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
networker 13:327622e38551 646 0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1, 0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
networker 13:327622e38551 647 0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5, 0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
networker 13:327622e38551 648 0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9, 0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
networker 13:327622e38551 649 0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD, 0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
networker 13:327622e38551 650 0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
networker 13:327622e38551 651 };
networker 13:327622e38551 652
networker 13:327622e38551 653 #define CRC8_INIT 0xFF // Initial FCS value
networker 13:327622e38551 654 #define CRC8_OK 0xCF // Good final FCS value
networker 13:327622e38551 655 /*-----------------------------------------------------------------------------------*/
networker 13:327622e38551 656 uint8_t crc8(uint8_t *data, uint16_t len) {
networker 13:327622e38551 657 uint16_t count;
networker 13:327622e38551 658 uint8_t crc = CRC8_INIT;
networker 13:327622e38551 659 for (count = 0; count < len; count++)
networker 13:327622e38551 660 crc = crc8table[crc ^ data[count]];
networker 13:327622e38551 661 return crc;
networker 13:327622e38551 662 }
networker 13:327622e38551 663
networker 13:327622e38551 664 /*-----------------------------------------------------------------------------------*/
networker 13:327622e38551 665 uint8_t crc8_check(uint8_t *data, uint16_t len, uint8_t check_sum) {
networker 13:327622e38551 666 uint8_t crc;
networker 13:327622e38551 667
networker 13:327622e38551 668 crc = crc8(data, len);
networker 13:327622e38551 669
networker 13:327622e38551 670 crc = crc8table[crc ^ check_sum];
networker 13:327622e38551 671 if (crc == CRC8_OK)
networker 13:327622e38551 672 return 0; /* Valid */
networker 13:327622e38551 673 else
networker 13:327622e38551 674 return 1; /* Failed */
networker 13:327622e38551 675
networker 13:327622e38551 676 }
networker 13:327622e38551 677
networker 13:327622e38551 678 /*-----------------------------------------------------------------------------------*/
networker 13:327622e38551 679 uint8_t crc8_calc(uint8_t *data, uint16_t len) {
networker 13:327622e38551 680 /* Ones complement */
networker 13:327622e38551 681 return 0xFF - crc8(data, len);
networker 13:327622e38551 682 }