Ad van der Weiden / rfcomm

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   mbed_TANK_Kinect ftusbClass

RFCOMM.cpp@2:06b267903269, 2011-06-11 (annotated)

Committer:
networker
Date:
Sat Jun 11 17:37:35 2011 +0000
Revision:
2:06b267903269
Parent:
1:9f3821db3048
Child:
3:a90b1a8fd184
fixed an issue with length computation

Who changed what in which revision?

UserRevisionLine numberNew contents of line
networker 0:8d7b47ceb9f5 1 #include "mbed.h"
networker 0:8d7b47ceb9f5 2 #include "Utils.h"
networker 0:8d7b47ceb9f5 3 #include "RFCOMM.h"
networker 0:8d7b47ceb9f5 4
networker 0:8d7b47ceb9f5 5 // Control field values bit no. 1 2 3 4 5 6 7 8
networker 0:8d7b47ceb9f5 6 #define BT_RFCOMM_SABM 0x3F // 1 1 1 1 P/F 1 0 0
networker 0:8d7b47ceb9f5 7 #define BT_RFCOMM_UA 0x73 // 1 1 0 0 P/F 1 1 0
networker 0:8d7b47ceb9f5 8 #define BT_RFCOMM_DM 0x0F // 1 1 1 1 P/F 0 0 0
networker 0:8d7b47ceb9f5 9 #define BT_RFCOMM_DM_PF 0x1F
networker 1:9f3821db3048 10 #define BT_RFCOMM_DISC 0x53 // 1 1 0 0 P/F 0 1 0
networker 0:8d7b47ceb9f5 11 #define BT_RFCOMM_UIH 0xEF // 1 1 1 1 P/F 1 1 1
networker 0:8d7b47ceb9f5 12 #define BT_RFCOMM_UIH_PF 0xFF
networker 0:8d7b47ceb9f5 13
networker 0:8d7b47ceb9f5 14 // Multiplexer message types
networker 0:8d7b47ceb9f5 15 #define BT_RFCOMM_PN_CMD 0x83
networker 0:8d7b47ceb9f5 16 #define BT_RFCOMM_PN_RSP 0x81
networker 0:8d7b47ceb9f5 17 #define BT_RFCOMM_TEST_CMD 0x23
networker 0:8d7b47ceb9f5 18 #define BT_RFCOMM_TEST_RSP 0x21
networker 0:8d7b47ceb9f5 19 #define BT_RFCOMM_FCON_CMD 0xA3
networker 0:8d7b47ceb9f5 20 #define BT_RFCOMM_FCON_RSP 0xA1
networker 0:8d7b47ceb9f5 21 #define BT_RFCOMM_FCOFF_CMD 0x63
networker 0:8d7b47ceb9f5 22 #define BT_RFCOMM_FCOFF_RSP 0x61
networker 0:8d7b47ceb9f5 23 #define BT_RFCOMM_MSC_CMD 0xE3
networker 0:8d7b47ceb9f5 24 #define BT_RFCOMM_MSC_RSP 0xE1
networker 0:8d7b47ceb9f5 25 #define BT_RFCOMM_RPN_CMD 0x93
networker 0:8d7b47ceb9f5 26 #define BT_RFCOMM_RPN_RSP 0x91
networker 0:8d7b47ceb9f5 27 #define BT_RFCOMM_RLS_CMD 0x53
networker 0:8d7b47ceb9f5 28 #define BT_RFCOMM_RLS_RSP 0x51
networker 0:8d7b47ceb9f5 29 #define BT_RFCOMM_NSC_RSP 0x11
networker 0:8d7b47ceb9f5 30
networker 0:8d7b47ceb9f5 31 // FCS calc
networker 0:8d7b47ceb9f5 32 #define BT_RFCOMM_CODE_WORD 0xE0 // pol = x8+x2+x1+1
networker 0:8d7b47ceb9f5 33 #define BT_RFCOMM_CRC_CHECK_LEN 3
networker 0:8d7b47ceb9f5 34 #define BT_RFCOMM_UIHCRC_CHECK_LEN 2
networker 0:8d7b47ceb9f5 35
networker 0:8d7b47ceb9f5 36 #define NR_CREDITS 1
networker 0:8d7b47ceb9f5 37 #define INITIAL_CREDITS 1 //0...7
networker 0:8d7b47ceb9f5 38 #define MAX_FRAME_SIZE 350 //ACL buffer - some headroom
networker 0:8d7b47ceb9f5 39
networker 0:8d7b47ceb9f5 40 #define DEBUG 1
networker 2:06b267903269 41 #define TAKE_INITIATIVE
networker 0:8d7b47ceb9f5 42
networker 0:8d7b47ceb9f5 43 //uint8_t rfcomm_out_buffer[1000];//seems a bit big as default max framesize is 127
networker 0:8d7b47ceb9f5 44 unsigned rfcomm::maxframesize = MAX_FRAME_SIZE; //only initial value
networker 0:8d7b47ceb9f5 45
networker 1:9f3821db3048 46 //these functions are obtained from rfcomm.c on google code
networker 0:8d7b47ceb9f5 47 void _bt_rfcomm_send_sabm(unsigned short source_cid, unsigned char initiator, unsigned char channel);
networker 0:8d7b47ceb9f5 48 void _bt_rfcomm_send_uih_pn_command(unsigned short source_cid, unsigned char initiator, unsigned char channel, unsigned short max_frame_size);
networker 0:8d7b47ceb9f5 49 void _bt_rfcomm_send_uih_msc_cmd(unsigned short source_cid, unsigned char initiator, unsigned char channel, unsigned char signals);
networker 1:9f3821db3048 50 void _bt_rfcomm_send_uih_rpn_cmd(uint16_t source_cid, uint8_t initiator, uint8_t dlci, port_settings *val);
networker 0:8d7b47ceb9f5 51 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 0:8d7b47ceb9f5 52 uint8_t crc8_calc(uint8_t *data, uint16_t len);
networker 0:8d7b47ceb9f5 53
networker 0:8d7b47ceb9f5 54
networker 0:8d7b47ceb9f5 55 //find a free socket slot for channel ch
networker 0:8d7b47ceb9f5 56 int rfcomm::find_slot(unsigned ch) {
networker 0:8d7b47ceb9f5 57 for (int i = 0; i < MAX_RFCOMM_SCKTS; i++) {
networker 0:8d7b47ceb9f5 58 if (sckts[i] != 0) { //socket is in use
networker 0:8d7b47ceb9f5 59 RFCOMMSocket *s = (RFCOMMSocket*)GetSocketInternal(sckts[i]);
networker 0:8d7b47ceb9f5 60 if (s==0) {
networker 0:8d7b47ceb9f5 61 printf("find_slot: socket %d not found\n", sckts[i]);
networker 0:8d7b47ceb9f5 62 continue;
networker 0:8d7b47ceb9f5 63 }
networker 0:8d7b47ceb9f5 64 if (s->dlci >> 1 == ch) {
networker 0:8d7b47ceb9f5 65 printf("Channel %d is already in use on socket %d\n", ch, sckts[i]);
networker 0:8d7b47ceb9f5 66 return -1;
networker 0:8d7b47ceb9f5 67 }
networker 0:8d7b47ceb9f5 68 } else //slot is free
networker 0:8d7b47ceb9f5 69 return i;
networker 0:8d7b47ceb9f5 70 }
networker 0:8d7b47ceb9f5 71 return -2; //no free slots
networker 0:8d7b47ceb9f5 72 }
networker 0:8d7b47ceb9f5 73
networker 0:8d7b47ceb9f5 74 //find the rfcomm socket for dlci
networker 0:8d7b47ceb9f5 75 RFCOMMSocket* rfcomm::find_socket(unsigned dlci) {
networker 0:8d7b47ceb9f5 76 for (int i = 0; i < MAX_RFCOMM_SCKTS; i++) {
networker 0:8d7b47ceb9f5 77 if (sckts[i] != 0) { //socket is in use
networker 0:8d7b47ceb9f5 78 RFCOMMSocket *s = (RFCOMMSocket*)GetSocketInternal(sckts[i]);
networker 0:8d7b47ceb9f5 79 if (s==0) {
networker 0:8d7b47ceb9f5 80 printf("find_socket: socket %d not found\n", sckts[i]);
networker 0:8d7b47ceb9f5 81 continue;
networker 0:8d7b47ceb9f5 82 }
networker 0:8d7b47ceb9f5 83 if (s->dlci == dlci) {
networker 0:8d7b47ceb9f5 84 return s;
networker 0:8d7b47ceb9f5 85 }
networker 0:8d7b47ceb9f5 86 }
networker 0:8d7b47ceb9f5 87 }
networker 0:8d7b47ceb9f5 88 printf("RFCOMMSocket for dlci %d was not found!\n", dlci);
networker 0:8d7b47ceb9f5 89 return 0; //socket not found
networker 0:8d7b47ceb9f5 90 }
networker 0:8d7b47ceb9f5 91
networker 0:8d7b47ceb9f5 92 //send a PN command to all sockets waiting to be opened
networker 0:8d7b47ceb9f5 93 void rfcomm::initChannels(int socket) {
networker 0:8d7b47ceb9f5 94 for (int i = 0; i < MAX_RFCOMM_SCKTS; i++) {
networker 0:8d7b47ceb9f5 95 if (sckts[i] != 0) { //socket is in use
networker 0:8d7b47ceb9f5 96 RFCOMMSocket *s = (RFCOMMSocket*)GetSocketInternal(sckts[i]);
networker 0:8d7b47ceb9f5 97 if (s==0) {
networker 0:8d7b47ceb9f5 98 printf("initChannels: socket %d not found\n", sckts[i]);
networker 0:8d7b47ceb9f5 99 continue;
networker 0:8d7b47ceb9f5 100 }
networker 0:8d7b47ceb9f5 101 if (s->State == SocketState_Opening) {
networker 0:8d7b47ceb9f5 102 printf("Sending PN for DLCI %d on socket %d\n", s->dlci, sckts[i]);
networker 0:8d7b47ceb9f5 103 _bt_rfcomm_send_uih_pn_command(socket, 1, s->dlci, maxframesize);
networker 0:8d7b47ceb9f5 104 s->State = SocketState_L2CAP_Config_wait;
networker 0:8d7b47ceb9f5 105 }
networker 0:8d7b47ceb9f5 106 }
networker 0:8d7b47ceb9f5 107 }
networker 0:8d7b47ceb9f5 108 }
networker 0:8d7b47ceb9f5 109
networker 0:8d7b47ceb9f5 110 unsigned rfcomm::release_channel(unsigned dlci) {
networker 0:8d7b47ceb9f5 111 int n = 0;
networker 0:8d7b47ceb9f5 112 for (int i = 0; i < MAX_RFCOMM_SCKTS; i++) {
networker 0:8d7b47ceb9f5 113 if (sckts[i] != 0) { //socket is in use
networker 0:8d7b47ceb9f5 114 RFCOMMSocket *s = (RFCOMMSocket*)GetSocketInternal(sckts[i]);
networker 0:8d7b47ceb9f5 115 if (s==0) {
networker 0:8d7b47ceb9f5 116 printf("Release: socket for dlci %d not found\n", dlci);
networker 0:8d7b47ceb9f5 117 continue;
networker 0:8d7b47ceb9f5 118 }
networker 0:8d7b47ceb9f5 119 if (s->dlci == dlci)
networker 0:8d7b47ceb9f5 120 sckts[i] = 0;
networker 0:8d7b47ceb9f5 121 else
networker 0:8d7b47ceb9f5 122 n++;
networker 0:8d7b47ceb9f5 123 }
networker 0:8d7b47ceb9f5 124 }
networker 0:8d7b47ceb9f5 125 return n;
networker 0:8d7b47ceb9f5 126 }
networker 0:8d7b47ceb9f5 127
networker 0:8d7b47ceb9f5 128 int rfcomm::Send(SocketInternal *sock, const u8* data, int len) {//also see if credits need to be send
networker 0:8d7b47ceb9f5 129 RFCOMMSocket *s = (RFCOMMSocket*)sock;
networker 0:8d7b47ceb9f5 130 char credits = 0;
networker 1:9f3821db3048 131 char control = BT_RFCOMM_UIH;
networker 0:8d7b47ceb9f5 132 if (len + 14 > maxframesize) //hci/l2cap header =8, rfcomm header ~ 6
networker 1:9f3821db3048 133 printf("Error! packetsize = %d, maxframesize = %d\n", len, maxframesize);
networker 0:8d7b47ceb9f5 134 if (s->peer_credits == 0) {//peer is low on credits
networker 0:8d7b47ceb9f5 135 credits = NR_CREDITS;
networker 1:9f3821db3048 136 control = BT_RFCOMM_UIH_PF;
networker 0:8d7b47ceb9f5 137 s->peer_credits += NR_CREDITS;//so provide some more
networker 0:8d7b47ceb9f5 138 }
networker 0:8d7b47ceb9f5 139 unsigned char address = (1 << 0) | (initiator << 1) | (s->dlci << 2);
networker 0:8d7b47ceb9f5 140 if (s->my_credits) {
networker 0:8d7b47ceb9f5 141 s->my_credits--;
networker 1:9f3821db3048 142 return rfcomm_send_packet(_l2cap, address, control, credits, data, len);
networker 0:8d7b47ceb9f5 143 } else
networker 1:9f3821db3048 144 return rfcomm_send_packet(_l2cap, address, control, credits, data, 0);//send an empty packet when credits run out
networker 0:8d7b47ceb9f5 145 }
networker 0:8d7b47ceb9f5 146
networker 0:8d7b47ceb9f5 147 int rfcomm::Close(SocketInternal* sock) {
networker 0:8d7b47ceb9f5 148 RFCOMMSocket *s = (RFCOMMSocket*)sock;
networker 0:8d7b47ceb9f5 149 int id = s->dlci;
networker 1:9f3821db3048 150 printf("Closing rfcomm dlci %d state=%d\n", id, s->State);
networker 0:8d7b47ceb9f5 151 Disconnect(s);
networker 0:8d7b47ceb9f5 152 int n = release_channel(id);
networker 0:8d7b47ceb9f5 153 printf("%d channels are still open\n", n);
networker 0:8d7b47ceb9f5 154 if (n == 0) {//all rfcomm channels are closed
networker 0:8d7b47ceb9f5 155 printf("....L2CAP must be closed as well\n");
networker 1:9f3821db3048 156 rfcomm_send_packet(_l2cap, (1 << 0) | (initiator << 1) /*| (!initiator << 2)*/, BT_RFCOMM_DISC, 0, 0, 0); //close dlci0
networker 0:8d7b47ceb9f5 157 Socket_Close(_l2cap);
networker 0:8d7b47ceb9f5 158 _l2cap = 0; //return rfcomm to the pool
networker 0:8d7b47ceb9f5 159 }
networker 0:8d7b47ceb9f5 160 return 0;
networker 0:8d7b47ceb9f5 161 }
networker 0:8d7b47ceb9f5 162
networker 0:8d7b47ceb9f5 163 int rfcomm::Disconnect(RFCOMMSocket *s) {
networker 0:8d7b47ceb9f5 164 unsigned char address = (1 << 0) | (initiator << 1) | (s->dlci << 2);
networker 0:8d7b47ceb9f5 165 return rfcomm_send_packet(_l2cap, address, BT_RFCOMM_DISC, 0, 0, 0);
networker 0:8d7b47ceb9f5 166 }
networker 0:8d7b47ceb9f5 167
networker 1:9f3821db3048 168 //expect this to be called with socket type=SOCKET_RFCOM and addr->psm = channel and addr->bdaddr is the BT addr
networker 1:9f3821db3048 169 //of the device to connect to.
networker 0:8d7b47ceb9f5 170 //eg. Socket_Open(SOCKET_RFCOM, rfcommaddr(bdaddr, chan), receiver_func, appl_obj);
networker 0:8d7b47ceb9f5 171 int rfcomm::Open(SocketInternal* sock, SocketAddrHdr* addr) {
networker 0:8d7b47ceb9f5 172 int ch = ((L2CAPAddr*)addr)->psm;//abused psm for channel ID
networker 0:8d7b47ceb9f5 173 RFCOMMSocket *s = (RFCOMMSocket*)sock;
networker 0:8d7b47ceb9f5 174 int slot = find_slot(ch);
networker 0:8d7b47ceb9f5 175 if (slot < 0) return 0;
networker 0:8d7b47ceb9f5 176 sckts[slot] = s->ID;
networker 0:8d7b47ceb9f5 177 s->serdevice = this;
networker 0:8d7b47ceb9f5 178 s->State = SocketState_Opening;
networker 0:8d7b47ceb9f5 179
networker 0:8d7b47ceb9f5 180 if (_l2cap == 0) { //no rfcomm -> l2cap connection yet
networker 0:8d7b47ceb9f5 181 printf("Need to open L2CAP channel first before opening RFCOMM channel %d\n", s->dlci);
networker 0:8d7b47ceb9f5 182 ((L2CAPAddr*)addr)->psm = L2CAP_PSM_RFCOMM;//open the l2cap channel and the rfcomm_ch channel
networker 0:8d7b47ceb9f5 183 initiator = 1;
networker 1:9f3821db3048 184 s->dlci = (ch<<1)|!initiator;
networker 0:8d7b47ceb9f5 185 _l2cap = Socket_Open(SOCKET_L2CAP, addr, OnRfCommControl, this);//this is the socket between the RFCOMM and the L2CAP layer
networker 0:8d7b47ceb9f5 186 if (_l2cap)
networker 0:8d7b47ceb9f5 187 printf("Successfully opened L2CAP channel on socket %d\n", _l2cap);
networker 0:8d7b47ceb9f5 188 else {
networker 0:8d7b47ceb9f5 189 printf("Opening L2CAP channel failed\n");
networker 1:9f3821db3048 190 sckts[slot] = 0;
networker 1:9f3821db3048 191 s->State = SocketState_Closed;
networker 0:8d7b47ceb9f5 192 return 0;
networker 0:8d7b47ceb9f5 193 }
networker 0:8d7b47ceb9f5 194 } else {//bypass the l2cap channel creation
networker 1:9f3821db3048 195 s->dlci = (ch<<1)|!initiator;
networker 0:8d7b47ceb9f5 196 _bt_rfcomm_send_uih_pn_command(_l2cap, initiator, s->dlci, maxframesize);
networker 1:9f3821db3048 197 s->State = SocketState_L2CAP_Config_wait;
networker 0:8d7b47ceb9f5 198 }
networker 0:8d7b47ceb9f5 199 return s->ID; //return the application unique socket nr.
networker 0:8d7b47ceb9f5 200 }
networker 1:9f3821db3048 201
networker 1:9f3821db3048 202 int rfcomm::set_remote_port_parameters(unsigned char dlci, port_settings *p) {
networker 1:9f3821db3048 203 _bt_rfcomm_send_uih_rpn_cmd(_l2cap, initiator, dlci, p);
networker 1:9f3821db3048 204 return 0;
networker 1:9f3821db3048 205 }
networker 1:9f3821db3048 206
networker 0:8d7b47ceb9f5 207 /*
networker 0:8d7b47ceb9f5 208 int rfcomm::Open(BD_ADDR* bdAddr, inquiry_info* info) {//obsolete???
networker 0:8d7b47ceb9f5 209 _addr = *bdAddr;
networker 0:8d7b47ceb9f5 210 L2CAPAddr sockAddr;
networker 0:8d7b47ceb9f5 211 sockAddr.bdaddr = _addr;
networker 0:8d7b47ceb9f5 212 //open an L2CAP socket for RFCOMM
networker 0:8d7b47ceb9f5 213 sockAddr.psm = L2CAP_PSM_RFCOMM;
networker 0:8d7b47ceb9f5 214 _l2cap = Socket_Open(SOCKET_L2CAP,&sockAddr.hdr,OnRfCommControl,this);//this is the socket between the RFCOMM and the L2CAP layer
networker 0:8d7b47ceb9f5 215
networker 0:8d7b47ceb9f5 216 printfBytes("OPEN DEVICE CLASS",info->dev_class,3);
networker 0:8d7b47ceb9f5 217 _devClass = (info->dev_class[0] << 16) | (info->dev_class[1] << 8) | info->dev_class[2];
networker 0:8d7b47ceb9f5 218 return _l2cap;
networker 0:8d7b47ceb9f5 219 }
networker 0:8d7b47ceb9f5 220 */
networker 0:8d7b47ceb9f5 221
networker 0:8d7b47ceb9f5 222 //socket is an L2CAP socket and state is the state of the L2CAP socket, not the RFCOMM socket
networker 1:9f3821db3048 223 void rfcomm::OnRfCommControl(int socket, SocketState state, const u8* data, int len, void* userData) {
networker 0:8d7b47ceb9f5 224 int packet_processed = 0;
networker 0:8d7b47ceb9f5 225 rfcomm* self = (rfcomm*)userData;
networker 1:9f3821db3048 226 const u8 initiator = self->initiator;
networker 1:9f3821db3048 227 printf("\x1B[%dm", 32); //debug: set a different colour
networker 0:8d7b47ceb9f5 228 printf("OnRfCommControl sock = %d, state = %d, length = %d\n", socket, state, len);
networker 0:8d7b47ceb9f5 229
networker 1:9f3821db3048 230 if (len == 0) {//client only
networker 0:8d7b47ceb9f5 231 if (state==SocketState_Open) {//callback after change to 'open', the rfcomm->l2cap channel is now open
networker 0:8d7b47ceb9f5 232 _bt_rfcomm_send_sabm(socket, initiator, 0); //setup the rfcomm control channel dlci==0
networker 0:8d7b47ceb9f5 233 return;
networker 0:8d7b47ceb9f5 234 }
networker 1:9f3821db3048 235 return; //or other states to handle, e.g. Closing or Closed
networker 0:8d7b47ceb9f5 236 }
networker 0:8d7b47ceb9f5 237 //we have data, so parse the header
networker 0:8d7b47ceb9f5 238 const u8 &addr = data[0];
networker 0:8d7b47ceb9f5 239 u8 dlci = addr>>2;
networker 0:8d7b47ceb9f5 240 const u8 &control = data[1];
networker 0:8d7b47ceb9f5 241 u16 length = data[2]>>1;
networker 0:8d7b47ceb9f5 242 const u8 *payload = data+3;
networker 1:9f3821db3048 243 const u8 *pFCS = data+len-1; //expected position of the CRC
networker 2:06b267903269 244 if (!(data[2]&1)) { //two byte length
networker 2:06b267903269 245 length += ((unsigned)data[3])<<7;
networker 0:8d7b47ceb9f5 246 payload++;
networker 0:8d7b47ceb9f5 247 }
networker 0:8d7b47ceb9f5 248 u8 credits = 0;
networker 1:9f3821db3048 249 if (control == BT_RFCOMM_UIH_PF)//this packet carries credits
networker 0:8d7b47ceb9f5 250 credits = *(payload++);
networker 1:9f3821db3048 251 //sanity check
networker 1:9f3821db3048 252 if (payload+length != pFCS)
networker 1:9f3821db3048 253 printf("RFCOMM size mismatch, expected %d payload bytes, got %d\n", length, pFCS-payload);
networker 0:8d7b47ceb9f5 254
networker 0:8d7b47ceb9f5 255 if (DEBUG) {
networker 1:9f3821db3048 256 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 0:8d7b47ceb9f5 257 printfBytes("payload:", payload, length);
networker 0:8d7b47ceb9f5 258 }
networker 0:8d7b47ceb9f5 259 if (dlci == 0) { //dlci==0 control channel
networker 0:8d7b47ceb9f5 260 L2CAPSocket *s = (L2CAPSocket*)GetSocketInternal(socket);
networker 0:8d7b47ceb9f5 261 switch (control) {
networker 0:8d7b47ceb9f5 262 case BT_RFCOMM_UA:// received 1. message BT_RF_COMM_UA
networker 0:8d7b47ceb9f5 263 packet_processed++;
networker 1:9f3821db3048 264 if (s->si.State == SocketState_Closing || s->si.State==SocketState_L2CAP_WaitDisconnect) { //Confirmation of disconnect
networker 0:8d7b47ceb9f5 265 printf("Remote side confirmed disconnect for socket %d\n", s->si.ID);
networker 0:8d7b47ceb9f5 266 s->si.SetState(SocketState_Closed);
networker 0:8d7b47ceb9f5 267 break;
networker 0:8d7b47ceb9f5 268 }
networker 0:8d7b47ceb9f5 269 printf("Received RFCOMM unnumbered acknowledgement for channel 0 - multiplexer working\n");
networker 0:8d7b47ceb9f5 270 printf("Sending UIH Parameter Negotiation Command from OnRfCommControl\n");
networker 0:8d7b47ceb9f5 271 self->initChannels(socket);
networker 0:8d7b47ceb9f5 272 //_bt_rfcomm_send_uih_pn_command(socket, initiator, rfcomm_ch, MAX_FRAME_SIZE);
networker 0:8d7b47ceb9f5 273 break;
networker 0:8d7b47ceb9f5 274 case BT_RFCOMM_UIH:// received UIH Parameter Negotiation Response
networker 0:8d7b47ceb9f5 275 switch (payload[0]) {
networker 1:9f3821db3048 276 case BT_RFCOMM_PN_RSP: {//client
networker 0:8d7b47ceb9f5 277 packet_processed++;
networker 0:8d7b47ceb9f5 278 printf("UIH Parameter Negotiation Response\n");
networker 0:8d7b47ceb9f5 279 printf("Sending SABM #%u\n", payload[2]);
networker 0:8d7b47ceb9f5 280 _bt_rfcomm_send_sabm(socket, initiator, payload[2]);//was rfcomm_ch
networker 0:8d7b47ceb9f5 281 RFCOMMSocket *r = self->find_socket(payload[2]);
networker 0:8d7b47ceb9f5 282 if (r==0) break;
networker 0:8d7b47ceb9f5 283 r->my_credits = payload[9]; //initial amount of credits
networker 0:8d7b47ceb9f5 284 maxframesize = min(maxframesize, payload[6] + (payload[7]<<8));
networker 0:8d7b47ceb9f5 285 printf("Max Frame Size = %d, got %d initial credits\n", maxframesize, payload[9]);
networker 0:8d7b47ceb9f5 286 }
networker 0:8d7b47ceb9f5 287 break;
networker 1:9f3821db3048 288 case BT_RFCOMM_PN_CMD: { //remote side send PN command, mtu and initial credits
networker 1:9f3821db3048 289 packet_processed++;
networker 1:9f3821db3048 290 printf("UIH Parameter Negotiation Indication\n");
networker 1:9f3821db3048 291 maxframesize = min(maxframesize, payload[6] + (payload[7]<<8));
networker 1:9f3821db3048 292 unsigned char cred = payload[9] & 7;
networker 1:9f3821db3048 293 unsigned char _dlci = payload[2];
networker 1:9f3821db3048 294
networker 1:9f3821db3048 295 int skt = rfcomm_manager.find_socket(_dlci>>1);
networker 1:9f3821db3048 296 if (skt == 0) { //No-one is listening
networker 1:9f3821db3048 297 printf("No-one is Listening on channel %d\n", _dlci>>1);
networker 1:9f3821db3048 298 rfcomm_send_packet(socket, (_dlci<<2)|1, BT_RFCOMM_DM, 0, 0, 0);
networker 1:9f3821db3048 299 break;
networker 1:9f3821db3048 300 }
networker 1:9f3821db3048 301 RFCOMMSocket *r = (RFCOMMSocket*)GetSocketInternal(skt);
networker 1:9f3821db3048 302 r->my_credits = cred;
networker 1:9f3821db3048 303 r->peer_credits = INITIAL_CREDITS;
networker 1:9f3821db3048 304 unsigned char reply[10];
networker 1:9f3821db3048 305 memcpy(reply, payload, sizeof(reply));
networker 1:9f3821db3048 306 reply[0] = BT_RFCOMM_PN_RSP;//[1]=len, [2]=dlci, [4]=priority, [5]=timer(must be 0), [8] retransmissions (must be 0)
networker 1:9f3821db3048 307 reply[3] = payload[3]==0xF0 ? 0xE0 : 0; //support credit based flow control
networker 1:9f3821db3048 308 reply[6] = maxframesize;
networker 1:9f3821db3048 309 reply[7] = maxframesize>>8;
networker 1:9f3821db3048 310 reply[9] = payload[3]==0xF0 ? r->peer_credits : 0;
networker 1:9f3821db3048 311 printf("Max Frame Size = %d, give %d initial credits\n", maxframesize, reply[9]);
networker 1:9f3821db3048 312 rfcomm_send_packet(socket, addr^2, BT_RFCOMM_UIH, 0, reply, sizeof(reply));
networker 1:9f3821db3048 313 }
networker 1:9f3821db3048 314 break;
networker 0:8d7b47ceb9f5 315 case BT_RFCOMM_MSC_CMD:
networker 0:8d7b47ceb9f5 316 packet_processed++;
networker 0:8d7b47ceb9f5 317 {
networker 1:9f3821db3048 318 printf("Received BT_RFCOMM_MSC_IND\n");
networker 0:8d7b47ceb9f5 319 // fine with this
networker 0:8d7b47ceb9f5 320 RFCOMMSocket *r = self->find_socket(payload[2]>>2);
networker 0:8d7b47ceb9f5 321 if (r==0) break;
networker 1:9f3821db3048 322 unsigned char reply[5];
networker 1:9f3821db3048 323 memcpy(reply, payload, 5); //keep length, dlci and value(s)
networker 0:8d7b47ceb9f5 324 reply[0] = BT_RFCOMM_MSC_RSP; // change command into response
networker 1:9f3821db3048 325 printf("Sending MSC_RSP (%d bytes)\n", length);
networker 1:9f3821db3048 326 rfcomm_send_packet(socket, addr^2, BT_RFCOMM_UIH, 0, reply, (payload[1]>>1)+2); // reply is 4 or 5 bytes
networker 0:8d7b47ceb9f5 327 switch (r->State) {
networker 0:8d7b47ceb9f5 328 case SocketState_L2CAP_Config_wait:
networker 0:8d7b47ceb9f5 329 r->State = SocketState_L2CAP_Config_wait_send;
networker 1:9f3821db3048 330 printf("Sending MSC_CMD\n");
networker 1:9f3821db3048 331 _bt_rfcomm_send_uih_msc_cmd(socket, initiator, payload[2]>>2, 0x8d); // ea=1,fc=0,rtc(DSR/DTR)=1,rtr(RTS/CTs)=1,ic(RI)=0,dv(DCD)=1
networker 1:9f3821db3048 332 r->State = SocketState_L2CAP_Config_wait_rsp;
networker 0:8d7b47ceb9f5 333 break;
networker 0:8d7b47ceb9f5 334 case SocketState_L2CAP_Config_wait_reqrsp:
networker 0:8d7b47ceb9f5 335 r->State = SocketState_L2CAP_Config_wait_rsp;
networker 0:8d7b47ceb9f5 336 break;
networker 0:8d7b47ceb9f5 337 case SocketState_L2CAP_Config_wait_req:
networker 0:8d7b47ceb9f5 338 r->SetState(SocketState_Open);
networker 0:8d7b47ceb9f5 339 break;
networker 1:9f3821db3048 340 case SocketState_Open:
networker 1:9f3821db3048 341 //inform port adaptation layer
networker 1:9f3821db3048 342 printf("Received MSC IND in state Open for dlci 0x%02x\n", payload[2]>>2);
networker 1:9f3821db3048 343 break;
networker 1:9f3821db3048 344 default:
networker 1:9f3821db3048 345 printf("Received MSC IND in state %d for dlci 0x%02x\n", r->State, payload[2]>>2);
networker 0:8d7b47ceb9f5 346 }
networker 0:8d7b47ceb9f5 347 }
networker 0:8d7b47ceb9f5 348 break;
networker 0:8d7b47ceb9f5 349 case BT_RFCOMM_MSC_RSP:
networker 0:8d7b47ceb9f5 350 packet_processed++;
networker 0:8d7b47ceb9f5 351 {
networker 0:8d7b47ceb9f5 352 RFCOMMSocket *r = self->find_socket(payload[2]>>2);
networker 0:8d7b47ceb9f5 353 if (r==0) break;
networker 0:8d7b47ceb9f5 354 if (r->State == SocketState_L2CAP_Config_wait_reqrsp)
networker 0:8d7b47ceb9f5 355 r->State = SocketState_L2CAP_Config_wait_req;
networker 0:8d7b47ceb9f5 356 else if (r->State == SocketState_L2CAP_Config_wait_rsp)
networker 0:8d7b47ceb9f5 357 r->SetState(SocketState_Open);
networker 1:9f3821db3048 358 else
networker 1:9f3821db3048 359 printf("Received MSC confirmation in state %d for dlci 0x%02x\n", r->State, payload[2]>>2);
networker 0:8d7b47ceb9f5 360 }
networker 0:8d7b47ceb9f5 361 break;
networker 1:9f3821db3048 362 case BT_RFCOMM_RPN_CMD:
networker 1:9f3821db3048 363 packet_processed++;
networker 1:9f3821db3048 364 //accept and ignore all settings
networker 1:9f3821db3048 365 unsigned char reply[10];
networker 1:9f3821db3048 366 memcpy(reply, payload, length); //keep length, dlci and value(s)
networker 1:9f3821db3048 367 reply[0] = BT_RFCOMM_RPN_RSP; // change command into response
networker 1:9f3821db3048 368 printf("Responding to RPN indication (%d bytes)\n", length);
networker 1:9f3821db3048 369 rfcomm_send_packet(socket, addr^2, BT_RFCOMM_UIH, 0, reply, length);
networker 1:9f3821db3048 370 break;
networker 1:9f3821db3048 371 case BT_RFCOMM_RPN_RSP:
networker 1:9f3821db3048 372 packet_processed++;
networker 1:9f3821db3048 373 //ignore a response
networker 1:9f3821db3048 374 printf("Received RPN confirmation\n");
networker 1:9f3821db3048 375 break;
networker 0:8d7b47ceb9f5 376 default:
networker 0:8d7b47ceb9f5 377 printf("Unsupported multiplexer frame, type=%02XH\n", data[3]);
networker 0:8d7b47ceb9f5 378 }
networker 0:8d7b47ceb9f5 379 break;
networker 0:8d7b47ceb9f5 380 case BT_RFCOMM_DISC:
networker 0:8d7b47ceb9f5 381 printf("Remote site actively disconnected from DLCI0\n");
networker 0:8d7b47ceb9f5 382 rfcomm_send_packet(socket, addr|2, BT_RFCOMM_UA, 0, 0, 0);//confirm disconnection
networker 1:9f3821db3048 383 //intentional fall through
networker 0:8d7b47ceb9f5 384 case BT_RFCOMM_DM:
networker 0:8d7b47ceb9f5 385 packet_processed++;
networker 0:8d7b47ceb9f5 386 printf("Remote side refused connection on DLCI0\n");
networker 0:8d7b47ceb9f5 387 self->_l2cap = Socket_Close(socket);
networker 0:8d7b47ceb9f5 388 break;
networker 0:8d7b47ceb9f5 389 case BT_RFCOMM_SABM:
networker 1:9f3821db3048 390 packet_processed++;
networker 1:9f3821db3048 391 printf("Remote site is seeking connection on DLCI0\n"); //respond with UA
networker 1:9f3821db3048 392 rfcomm_send_packet(socket, addr|2, BT_RFCOMM_UA, 0, 0, 0);//confirm connection
networker 0:8d7b47ceb9f5 393 break;
networker 0:8d7b47ceb9f5 394 default:
networker 1:9f3821db3048 395 printf("Unexpected RFCOMM cmd %02XH for address %02XH, length=%d\n", control, addr, length);
networker 0:8d7b47ceb9f5 396 }
networker 0:8d7b47ceb9f5 397 } else { //data is for one of the serial sockets
networker 1:9f3821db3048 398 RFCOMMSocket *s = 0;
networker 1:9f3821db3048 399 if (control == BT_RFCOMM_SABM) { //req. for conn on this dlci
networker 1:9f3821db3048 400 //cannot call self->rfcomm::find_socket because it has no socket yet
networker 1:9f3821db3048 401 int skt = rfcomm_manager.find_socket(dlci>>1); //find the server socket
networker 1:9f3821db3048 402 s = (RFCOMMSocket*)GetSocketInternal(skt);//the listening socket
networker 1:9f3821db3048 403 if (s) {//move the listening socket to the appropriate rfcomm
networker 1:9f3821db3048 404 int slot = self->find_slot(dlci>>1);
networker 1:9f3821db3048 405 if (slot < 0) {
networker 1:9f3821db3048 406 printf("RFCOMM Channel %d is not free on rfcomm with l2cap socket %d\n", dlci>>1, self->_l2cap);
networker 1:9f3821db3048 407 return;
networker 1:9f3821db3048 408 }
networker 1:9f3821db3048 409 s->serdevice = self; //bind the socket to this refcomm entity
networker 1:9f3821db3048 410 self->sckts[slot] = skt;
networker 1:9f3821db3048 411 rfcomm_manager.remove_socket(skt);
networker 1:9f3821db3048 412 } else {
networker 1:9f3821db3048 413 printf("Couln't find a listening socket for dlci %d\n", dlci);
networker 1:9f3821db3048 414 return;
networker 1:9f3821db3048 415 }
networker 1:9f3821db3048 416 } else
networker 1:9f3821db3048 417 s = self->find_socket(dlci);
networker 1:9f3821db3048 418 if (s==0){
networker 1:9f3821db3048 419 printf("DLCI %d not found\n", dlci);
networker 1:9f3821db3048 420 return;
networker 1:9f3821db3048 421 }
networker 0:8d7b47ceb9f5 422 switch (control) {
networker 1:9f3821db3048 423 case BT_RFCOMM_SABM:
networker 1:9f3821db3048 424 packet_processed++;
networker 1:9f3821db3048 425 rfcomm_send_packet(socket, addr|2, BT_RFCOMM_UA, 0, 0, 0);//confirm connection
networker 1:9f3821db3048 426 s->State = SocketState_L2CAP_Config_wait; //wait for msc cmd
networker 2:06b267903269 427 #ifdef TAKE_INITIATIVE
networker 2:06b267903269 428 printf("Sending MSC_CMD\n");
networker 2:06b267903269 429 _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 2:06b267903269 430 s->State = SocketState_L2CAP_Config_wait_reqrsp;
networker 2:06b267903269 431 #endif
networker 1:9f3821db3048 432 break;
networker 0:8d7b47ceb9f5 433 case BT_RFCOMM_UA:// received 2. message BT_RF_COMM_UA
networker 0:8d7b47ceb9f5 434 packet_processed++;
networker 0:8d7b47ceb9f5 435 if (s->State == SocketState_Closing) { //Confirmation of disconnect
networker 0:8d7b47ceb9f5 436 printf("Remote side confirmed disconnect for socket %d\n", s->ID);
networker 0:8d7b47ceb9f5 437 s->SetState(SocketState_Closed);
networker 0:8d7b47ceb9f5 438 break;
networker 0:8d7b47ceb9f5 439 }
networker 0:8d7b47ceb9f5 440 printf("Received RFCOMM unnumbered acknowledgement for dlci %u - channel opened\n", dlci);
networker 0:8d7b47ceb9f5 441 if (s->State == SocketState_L2CAP_Config_wait) {
networker 1:9f3821db3048 442 printf("Sending MSC CMD\n");
networker 0:8d7b47ceb9f5 443 _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 0:8d7b47ceb9f5 444 s->State = SocketState_L2CAP_Config_wait_reqrsp;
networker 0:8d7b47ceb9f5 445 }
networker 0:8d7b47ceb9f5 446 break;
networker 0:8d7b47ceb9f5 447 case BT_RFCOMM_UIH_PF: //user data with credits
networker 0:8d7b47ceb9f5 448 printf("Got %u credits\n", credits);
networker 0:8d7b47ceb9f5 449 s->my_credits += credits;
networker 1:9f3821db3048 450 //intentional fall-through
networker 0:8d7b47ceb9f5 451 case BT_RFCOMM_UIH: //user data
networker 0:8d7b47ceb9f5 452 packet_processed++;
networker 0:8d7b47ceb9f5 453 if (DEBUG) {
networker 0:8d7b47ceb9f5 454 printf("RX: address %02x, control %02x: ", addr, control);
networker 1:9f3821db3048 455 printHex( payload, length);
networker 0:8d7b47ceb9f5 456 }
networker 1:9f3821db3048 457 if (length) {
networker 0:8d7b47ceb9f5 458 s->peer_credits--;
networker 1:9f3821db3048 459 s->Recv(payload, length);
networker 0:8d7b47ceb9f5 460 } else
networker 0:8d7b47ceb9f5 461 printf("Received empty packet\n");
networker 1:9f3821db3048 462 if (length == 0 || s->peer_credits == 0) {//send credits when peer runs out
networker 1:9f3821db3048 463 //char ini = !(dlci & 1);
networker 1:9f3821db3048 464 unsigned char address = (1 << 0) | (initiator << 1) | (dlci << 2);
networker 1:9f3821db3048 465 printf("send %d credits to dlci %d\n", NR_CREDITS, addr>>2);
networker 0:8d7b47ceb9f5 466 rfcomm_send_packet(socket, address, BT_RFCOMM_UIH_PF, NR_CREDITS, NULL, 0);
networker 0:8d7b47ceb9f5 467 s->peer_credits += NR_CREDITS;
networker 0:8d7b47ceb9f5 468 }
networker 0:8d7b47ceb9f5 469 break;
networker 1:9f3821db3048 470 case BT_RFCOMM_DISC:
networker 1:9f3821db3048 471 packet_processed++;
networker 1:9f3821db3048 472 printf("Received DISC IND for dlci %d\n", dlci);
networker 1:9f3821db3048 473 rfcomm_send_packet(socket, addr, BT_RFCOMM_UA, 0, 0, 0);//confirm disconnection
networker 1:9f3821db3048 474 s->SetState(SocketState_Closed);
networker 1:9f3821db3048 475 break;
networker 1:9f3821db3048 476 case BT_RFCOMM_DM:
networker 1:9f3821db3048 477 case BT_RFCOMM_DM_PF:
networker 1:9f3821db3048 478 packet_processed++;
networker 1:9f3821db3048 479 printf("Received DM IND (%02X) for dlci %d\n", control, dlci);
networker 1:9f3821db3048 480 s->SetState(SocketState_Closed);
networker 1:9f3821db3048 481 break;
networker 0:8d7b47ceb9f5 482 default:
networker 0:8d7b47ceb9f5 483 printf("Unexpected RFCOMM cmd %02XH for address %02XH, length=%d\n", control, addr, length);
networker 0:8d7b47ceb9f5 484 }
networker 0:8d7b47ceb9f5 485 }
networker 0:8d7b47ceb9f5 486
networker 0:8d7b47ceb9f5 487 if (!packet_processed) {
networker 0:8d7b47ceb9f5 488 // just dump data for now
networker 0:8d7b47ceb9f5 489 printf("??: address %02x, control %02x: ", data[0], data[1]);
networker 0:8d7b47ceb9f5 490 printHex( data, len );
networker 0:8d7b47ceb9f5 491 }
networker 1:9f3821db3048 492 printf("\x1B[%dm", 0);//reset terminal colour
networker 0:8d7b47ceb9f5 493 }
networker 0:8d7b47ceb9f5 494
networker 0:8d7b47ceb9f5 495 /**
networker 0:8d7b47ceb9f5 496 * @param credits - only used for RFCOMM flow control in UIH wiht P/F = 1
networker 0:8d7b47ceb9f5 497 */
networker 1:9f3821db3048 498 /* Questionable optimisation. When OFFSET==8 a buffer is (dynamically) allocated that provides space for the lower
networker 1:9f3821db3048 499 layer headers, this reduces copying to, and allocation of, a lower layer buffer. However, all other layers using
networker 1:9f3821db3048 500 HCI/L2CAP must do the same.
networker 1:9f3821db3048 501 */
networker 0:8d7b47ceb9f5 502 #define OFFSET 8
networker 1:9f3821db3048 503
networker 0:8d7b47ceb9f5 504 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 0:8d7b47ceb9f5 505
networker 0:8d7b47ceb9f5 506 uint16_t pos = OFFSET;
networker 0:8d7b47ceb9f5 507 uint8_t crc_fields = 3;
networker 0:8d7b47ceb9f5 508
networker 0:8d7b47ceb9f5 509 #if OFFSET == 8
networker 0:8d7b47ceb9f5 510 uint8_t* rfcomm_out_buffer = new uint8_t[OFFSET+len+6];
networker 0:8d7b47ceb9f5 511 #else
networker 0:8d7b47ceb9f5 512 static uint8_t rfcomm_out_buffer[MAXFRAMESIZE+6];//seems a bit big as default max framesize is 127
networker 0:8d7b47ceb9f5 513 #endif
networker 0:8d7b47ceb9f5 514 rfcomm_out_buffer[pos++] = address;
networker 0:8d7b47ceb9f5 515 rfcomm_out_buffer[pos++] = control;
networker 0:8d7b47ceb9f5 516
networker 0:8d7b47ceb9f5 517 // length field can be 1 or 2 octets
networker 0:8d7b47ceb9f5 518 if (len < 128) {
networker 0:8d7b47ceb9f5 519 rfcomm_out_buffer[pos++] = (len << 1)| 1; // bits 0-6
networker 0:8d7b47ceb9f5 520 } else {
networker 0:8d7b47ceb9f5 521 rfcomm_out_buffer[pos++] = (len & 0x7f) << 1; // bits 0-6
networker 0:8d7b47ceb9f5 522 rfcomm_out_buffer[pos++] = len >> 7; // bits 7-14
networker 0:8d7b47ceb9f5 523 crc_fields++;
networker 0:8d7b47ceb9f5 524 }
networker 0:8d7b47ceb9f5 525
networker 0:8d7b47ceb9f5 526 // add credits for UIH frames when PF bit is set
networker 0:8d7b47ceb9f5 527 if (control == BT_RFCOMM_UIH_PF) {
networker 0:8d7b47ceb9f5 528 rfcomm_out_buffer[pos++] = credits;
networker 0:8d7b47ceb9f5 529 }
networker 0:8d7b47ceb9f5 530
networker 0:8d7b47ceb9f5 531 // copy actual data
networker 0:8d7b47ceb9f5 532 memcpy(&rfcomm_out_buffer[pos], data, len);
networker 0:8d7b47ceb9f5 533 pos += len;
networker 0:8d7b47ceb9f5 534
networker 0:8d7b47ceb9f5 535 // UIH frames only calc FCS over address + control (5.1.1)
networker 0:8d7b47ceb9f5 536 if ((control & 0xef) == BT_RFCOMM_UIH) {
networker 0:8d7b47ceb9f5 537 crc_fields = 2;
networker 0:8d7b47ceb9f5 538 }
networker 1:9f3821db3048 539 rfcomm_out_buffer[pos++] = crc8_calc(rfcomm_out_buffer+OFFSET, crc_fields); // calc fcs
networker 0:8d7b47ceb9f5 540 int retval = Socket_Send( source_cid, rfcomm_out_buffer, pos);
networker 0:8d7b47ceb9f5 541 #if OFFSET == 8
networker 0:8d7b47ceb9f5 542 delete[] rfcomm_out_buffer;
networker 0:8d7b47ceb9f5 543 #endif
networker 0:8d7b47ceb9f5 544 if (retval <= 0)
networker 1:9f3821db3048 545 return retval;
networker 0:8d7b47ceb9f5 546 return len;//return the size of the payload
networker 0:8d7b47ceb9f5 547 }
networker 0:8d7b47ceb9f5 548
networker 0:8d7b47ceb9f5 549 void _bt_rfcomm_send_sabm(uint16_t source_cid, uint8_t initiator, uint8_t dlci) {
networker 0:8d7b47ceb9f5 550 uint8_t address = (1 << 0) | (initiator << 1) | (dlci << 2);
networker 0:8d7b47ceb9f5 551 rfcomm_send_packet(source_cid, address, BT_RFCOMM_SABM, 0, NULL, 0);
networker 0:8d7b47ceb9f5 552 }
networker 0:8d7b47ceb9f5 553
networker 0:8d7b47ceb9f5 554 void _bt_rfcomm_send_uih_pn_command(uint16_t source_cid, uint8_t initiator, uint8_t dlci, uint16_t max_frame_size) {
networker 0:8d7b47ceb9f5 555 uint8_t payload[10];
networker 0:8d7b47ceb9f5 556 uint8_t address = (1 << 0) | (initiator << 1); // EA and C/R bit set - always server channel 0
networker 0:8d7b47ceb9f5 557 uint8_t pos = 0;
networker 0:8d7b47ceb9f5 558 payload[pos++] = BT_RFCOMM_PN_CMD;
networker 0:8d7b47ceb9f5 559 payload[pos++] = 8 << 1 | 1; // len
networker 0:8d7b47ceb9f5 560 payload[pos++] = dlci;
networker 0:8d7b47ceb9f5 561 payload[pos++] = 0xf0; // pre defined for Bluetooth, see 5.5.3 of TS 07.10 Adaption for RFCOMM
networker 0:8d7b47ceb9f5 562 payload[pos++] = 0; // priority
networker 0:8d7b47ceb9f5 563 payload[pos++] = 0; // max 60 seconds ack
networker 0:8d7b47ceb9f5 564 payload[pos++] = max_frame_size & 0xff; // max framesize low
networker 0:8d7b47ceb9f5 565 payload[pos++] = max_frame_size >> 8; // max framesize high
networker 0:8d7b47ceb9f5 566 payload[pos++] = 0x00; // number of retransmissions
networker 0:8d7b47ceb9f5 567 payload[pos++] = INITIAL_CREDITS; // unused error recovery window
networker 0:8d7b47ceb9f5 568 rfcomm_send_packet(source_cid, address, BT_RFCOMM_UIH, 0, (uint8_t *) payload, pos);
networker 0:8d7b47ceb9f5 569 }
networker 0:8d7b47ceb9f5 570
networker 0:8d7b47ceb9f5 571 void _bt_rfcomm_send_uih_data(uint16_t source_cid, uint8_t initiator, uint8_t channel, uint8_t *data, uint16_t len) {
networker 0:8d7b47ceb9f5 572 uint8_t address = (1 << 0) | (initiator << 1) | (!initiator << 2) | (channel << 3);
networker 0:8d7b47ceb9f5 573 rfcomm_send_packet(source_cid, address, BT_RFCOMM_UIH, 0, data, len);
networker 0:8d7b47ceb9f5 574 }
networker 0:8d7b47ceb9f5 575
networker 0:8d7b47ceb9f5 576 void _bt_rfcomm_send_uih_msc_cmd(uint16_t source_cid, uint8_t initiator, uint8_t dlci, uint8_t signals) {
networker 0:8d7b47ceb9f5 577 uint8_t address = (1 << 0) | (initiator << 1); // EA and C/R bit set - always server channel 0
networker 1:9f3821db3048 578 uint8_t payload[5];
networker 0:8d7b47ceb9f5 579 uint8_t pos = 0;
networker 0:8d7b47ceb9f5 580 payload[pos++] = BT_RFCOMM_MSC_CMD;
networker 1:9f3821db3048 581 payload[pos++] = 2 << 1 | 1; // len, should be adapted when adding break byte
networker 1:9f3821db3048 582 payload[pos++] = (1 << 0) | (1 << 1) | (dlci << 2); //C/R is always 1
networker 0:8d7b47ceb9f5 583 payload[pos++] = signals;
networker 1:9f3821db3048 584 // payload[pos++] = brk;
networker 0:8d7b47ceb9f5 585 rfcomm_send_packet(source_cid, address, BT_RFCOMM_UIH, 0, (uint8_t *) payload, pos);
networker 0:8d7b47ceb9f5 586 }
networker 0:8d7b47ceb9f5 587
networker 1:9f3821db3048 588 void _bt_rfcomm_send_uih_rpn_cmd(uint16_t source_cid, uint8_t initiator, uint8_t dlci, port_settings *val) {
networker 1:9f3821db3048 589 uint8_t address = (1 << 0) | (initiator << 1); // EA and C/R bit set - always server channel 0
networker 1:9f3821db3048 590 uint8_t payload[sizeof(port_settings)+3];
networker 1:9f3821db3048 591 uint8_t pos = 0;
networker 1:9f3821db3048 592 payload[pos++] = BT_RFCOMM_RPN_CMD;//type
networker 1:9f3821db3048 593 if (val) {
networker 1:9f3821db3048 594 payload[pos++] = ((1+sizeof(port_settings)) << 1) | 1; // len
networker 1:9f3821db3048 595 payload[pos++] = (1 << 0) | (1 << 1) | (dlci << 2);
networker 1:9f3821db3048 596 memcpy(payload+pos, (char*)val, sizeof(port_settings));
networker 1:9f3821db3048 597 pos += sizeof(port_settings);
networker 1:9f3821db3048 598 } else {
networker 1:9f3821db3048 599 payload[pos++] = (1 << 1) | 1; // len
networker 1:9f3821db3048 600 payload[pos++] = (1 << 0) | (1 << 1) | (dlci << 2);
networker 1:9f3821db3048 601 }
networker 1:9f3821db3048 602 rfcomm_send_packet(source_cid, address, BT_RFCOMM_UIH, 0, (uint8_t *) payload, pos);
networker 1:9f3821db3048 603 }
networker 1:9f3821db3048 604
networker 1:9f3821db3048 605 int set_remote_port_parameters(int socket, port_settings *p) {
networker 1:9f3821db3048 606 RFCOMMSocket* si = (RFCOMMSocket*)GetSocketInternal(socket);//gets the RFCOMM socket
networker 1:9f3821db3048 607 if (!si || si->ID != socket)
networker 1:9f3821db3048 608 return ERR_SOCKET_NOT_FOUND;
networker 1:9f3821db3048 609 return si->serdevice->set_remote_port_parameters(si->dlci, p);
networker 1:9f3821db3048 610 }
networker 1:9f3821db3048 611
networker 1:9f3821db3048 612
networker 0:8d7b47ceb9f5 613 /*
networker 0:8d7b47ceb9f5 614 * CRC (reversed crc) lookup table as calculated by the table generator in ETSI TS 101 369 V6.3.0.
networker 0:8d7b47ceb9f5 615 */
networker 0:8d7b47ceb9f5 616 static const uint8_t crc8table[256] = { /* reversed, 8-bit, poly=0x07 */
networker 0:8d7b47ceb9f5 617 0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75, 0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
networker 0:8d7b47ceb9f5 618 0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69, 0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
networker 0:8d7b47ceb9f5 619 0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D, 0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
networker 0:8d7b47ceb9f5 620 0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51, 0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
networker 0:8d7b47ceb9f5 621 0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05, 0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
networker 0:8d7b47ceb9f5 622 0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19, 0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
networker 0:8d7b47ceb9f5 623 0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D, 0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
networker 0:8d7b47ceb9f5 624 0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21, 0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
networker 0:8d7b47ceb9f5 625 0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95, 0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
networker 0:8d7b47ceb9f5 626 0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89, 0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
networker 0:8d7b47ceb9f5 627 0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD, 0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
networker 0:8d7b47ceb9f5 628 0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1, 0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
networker 0:8d7b47ceb9f5 629 0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5, 0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
networker 0:8d7b47ceb9f5 630 0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9, 0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
networker 0:8d7b47ceb9f5 631 0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD, 0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
networker 0:8d7b47ceb9f5 632 0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
networker 0:8d7b47ceb9f5 633 };
networker 0:8d7b47ceb9f5 634
networker 0:8d7b47ceb9f5 635 #define CRC8_INIT 0xFF // Initial FCS value
networker 0:8d7b47ceb9f5 636 #define CRC8_OK 0xCF // Good final FCS value
networker 0:8d7b47ceb9f5 637 /*-----------------------------------------------------------------------------------*/
networker 0:8d7b47ceb9f5 638 uint8_t crc8(uint8_t *data, uint16_t len) {
networker 0:8d7b47ceb9f5 639 uint16_t count;
networker 0:8d7b47ceb9f5 640 uint8_t crc = CRC8_INIT;
networker 0:8d7b47ceb9f5 641 for (count = 0; count < len; count++)
networker 0:8d7b47ceb9f5 642 crc = crc8table[crc ^ data[count]];
networker 0:8d7b47ceb9f5 643 return crc;
networker 0:8d7b47ceb9f5 644 }
networker 0:8d7b47ceb9f5 645
networker 0:8d7b47ceb9f5 646 /*-----------------------------------------------------------------------------------*/
networker 0:8d7b47ceb9f5 647 uint8_t crc8_check(uint8_t *data, uint16_t len, uint8_t check_sum) {
networker 0:8d7b47ceb9f5 648 uint8_t crc;
networker 0:8d7b47ceb9f5 649
networker 0:8d7b47ceb9f5 650 crc = crc8(data, len);
networker 0:8d7b47ceb9f5 651
networker 0:8d7b47ceb9f5 652 crc = crc8table[crc ^ check_sum];
networker 0:8d7b47ceb9f5 653 if (crc == CRC8_OK)
networker 0:8d7b47ceb9f5 654 return 0; /* Valid */
networker 0:8d7b47ceb9f5 655 else
networker 0:8d7b47ceb9f5 656 return 1; /* Failed */
networker 0:8d7b47ceb9f5 657
networker 0:8d7b47ceb9f5 658 }
networker 0:8d7b47ceb9f5 659
networker 0:8d7b47ceb9f5 660 /*-----------------------------------------------------------------------------------*/
networker 0:8d7b47ceb9f5 661 uint8_t crc8_calc(uint8_t *data, uint16_t len) {
networker 0:8d7b47ceb9f5 662 /* Ones complement */
networker 0:8d7b47ceb9f5 663 return 0xFF - crc8(data, len);
networker 0:8d7b47ceb9f5 664 }