SDP client for myBlueUSB
Dependents: mbed_TANK_Kinect ftusbClass
sdp.cpp
- Committer:
- networker
- Date:
- 2011-04-04
- Revision:
- 0:7493bf6bb1b9
- Child:
- 1:70ee392bcfd4
File content as of revision 0:7493bf6bb1b9:
#include "mbed.h" #include "Utils.h" #include "hci.h" #include "sdp_data.h" #include "sdp.h" SDPManager SDP; //instance const unsigned char base_uuid[16] = { 0xfb, 0x34, 0x9b, 0x5f, 0x80, 0, 0x07, 0x70, 0, 0x10, 0, 0}; void attribHandler(serv_rec *r) { printf("Service 0x%08X\n", (*r)[0x0000]->asUnsigned()); map<unsigned short, sdp_data*>::iterator it = r->begin(); for (;it != r->end();it++) { printf(" 0x%04X: %s\n", (*it).first, (*it).second->asString()); } } //this function is called when the L2CAP layer receives SDP packets (see SDPManager::Open), userdata is the sdpmanager instance void SDPManager::OnSdpRsp(int socket, SocketState state, const u8* data, int len, void* userData) { printf("\x1B[%dm", 34); printf("OnSdpRsp(socket=%d, state=%d, len=%d)\n", socket, state, len); //printfBytes("Got SDP Response from L2CAP: ", data, len); SDPManager *self = (SDPManager*)userData; if (state != SocketState_Open) return; sdp_data list(sdp_data::SEQUENCE); if (data) self->parseRsp(data, len); if (len==0) { sdp_data root(sdp_data::UUID, 0x1101); sdp_data req(sdp_data::SEQUENCE); req.add_element(&root); self->ServiceSearchRequest(&req, 5); } else if (data[0]==3) { self->index = self->services.begin(); if (self->index != self->services.end()) { unsigned handle = (*self->index).first; //printf("req.: handle %#X\n", handle); sdp_data all(0xffffU,4); list.add_element(&all); self->ServiceAttributeRequest(handle, 100, &list);//0x1001D self->index++; } else printf(" - empty list - \n");//should not happen } else if (data[0]==5) { if (self->index != self->services.end()) { //printf("req.: handle %#X\n", (*self->index).first); self->ServiceAttributeRequest((*self->index).first, 100, &list); self->index++; } else { printf(" - end of list - \n"); Socket_Close(self->sdp_socket); //Note: socket=L2CAP, sdp_socket=SDP !!! } } printf("\x1B[%dm", 0); } //this function is called when the SDP sockets receives data (see HCICallback in TestShell), //currently does not happen because not forwarded from OnSdpRsp, can be used to handle multiple connections void SDPManager::OnSockCallback(int socket, SocketState state, const u8* data, int len, void* userData) { printf("OnSockCallback(socket=%d, state=%d, len=%d)\n", socket, state, len); printfBytes("Got SDP Response from socket: ", data, len); } void SDPManager::errorhandler(unsigned err) {//default error handler switch (err) { case 1: printf("Unsupported version of SDP\n"); break; case 2: printf("Invalid SDP ServiceRecordHandle\n"); break; case 3: printf("SDP syntax error\n"); break; case 4: printf("PDU size was invalid\n"); break; case 5: printf("Continuation state was invalid\n"); break; case 6: printf("SDP server has insufficient resources\n"); break; default: printf("Unknown SDP error code\n"); break; } } int SDPManager::ServiceSearchRequest(sdp_data *sp, unsigned count, unsigned cs) { int parlen = sp->Size() + 3; //no continuation buf[0] = 2; //pdu buf[1] = txid>>8; buf[2] = txid++; buf[4] = parlen; buf[3] = parlen>>8; int p = sp->build(buf+5, 100-10); buf[p+6] = count; buf[p+5] = count>>8; if (cs==0) buf[p+7] = 0; else printf("Continuation not supported\n"); //printfBytes("SDP Send: ", buf, parlen+5); return Socket_Send(_l2cap, l2cap_buf, parlen + 5 + OFFSET); } int SDPManager::ServiceAttributeRequest(unsigned handle, unsigned count, sdp_data* al, unsigned cs) { int parlen = al->Size() + 7; //no continuation buf[0] = 4; //pdu buf[1] = txid>>8; buf[2] = txid++; buf[4] = parlen; buf[3] = parlen>>8; for (int i = 0; i < 4; i++) buf[i+5] = ((char*)&handle)[3-i]; buf[9] = count>>8; buf[10] = count; int p = al->build(buf+11, 100-26); if (cs==0) buf[p+11] = 0; else printf("Continuation not supported\n"); //printfBytes("SDP Send: ", buf, parlen+5); return Socket_Send(_l2cap, l2cap_buf, parlen + 5 + OFFSET); } int SDPManager::ServiceSearchAttributeRequest(sdp_data *sp, unsigned count, sdp_data* al, unsigned cs) { int parlen = sp->Size() + al->Size() + 3; //no continuation (1 byte), count (2 bytes) buf[0] = 6; //pdu buf[1] = txid>>8; buf[2] = txid++; buf[4] = parlen; buf[3] = parlen>>8; int p = sp->build(buf+5, 30); buf[p+6] = count; buf[p+5] = count>>8; p += al->build(buf+11, 100-38); if (cs==0) buf[p+7] = 0; else printf("Continuation not supported\n"); //printfBytes("SDP Send: ", buf, parlen+5); return Socket_Send(_l2cap, l2cap_buf, parlen + 5 + OFFSET); } unsigned SDPManager::getval(const unsigned char *p, int n) { unsigned ret = 0; for (int i = 0; i < n; i++) ret = (ret<<8) + (unsigned)p[i]; return ret; } unsigned SDPManager::length(const unsigned char *el, unsigned &p) { unsigned len = 0; switch (el[p++] & 7) {//length case 0: len = 1; break; case 1: len = 2; break; case 2: len = 4; break; case 3: len = 8; break; case 4: len = 16; break; case 7://4bytes len= el[p++]<<24; len += el[p++]<<16; case 6://2bytes len += el[p++]<<8; case 5://1byte len += el[p++]; break; } return len; } extern "C" void HardFault_Handler() { printf("Hard Fault!\n"); while(1); } unsigned SDPManager::parse (const unsigned char *el, unsigned count, sdp_data* &result, serv_rec* &record) { unsigned p = 0; unsigned len = length(el, p); int end = p+len;//end is the index of the item just after the sequence sdp_data *item = 0; switch (el[0]>>3) {//type case sdp_data::NULL_: item = new sdp_data(); break; case sdp_data::UNSIGNED: item = new sdp_data((unsigned)getval(el+p, len), len); break; case sdp_data::SIGNED: item = new sdp_data((int)getval(el+p, len), len); break; case sdp_data::UUID: if (len==16) { char rev[16]; for (int i = 0; i < 16; i++) rev[i] = el[p+15-i]; item = new sdp_data(sdp_data::UUID, rev, len); } else item = new sdp_data(sdp_data::UUID, getval(el+p, len), len); break; case sdp_data::STRING: item = new sdp_data((char*)el+p, len); break; case sdp_data::BOOL: item = new sdp_data((bool)getval(el+p, len), len); break; case sdp_data::SEQUENCE: item = new sdp_data(sdp_data::SEQUENCE); goto skip; case sdp_data::ALTERNATIVE: item = new sdp_data(sdp_data::ALTERNATIVE); skip: {//p points just after the length indicator, hence at the first item IN the sequence // printf("SEQ%d{%p ", len, item); int n = 0; unsigned short key; serv_rec *dummy = 0; while (p < end) { sdp_data *elem = 0; p += parse(el + p, len-p, elem, dummy);//parse each element in the sequence, the second arg is as yet unused item->add_element(elem); if (record) { if (n & 1) { //value record->insert(pair<unsigned short, sdp_data*>(key, elem)); } else //key key = elem->asUnsigned(); n++; } } } // printf("}\n"); break; case 8: item = new sdp_data(sdp_data::URL, (char*)el+p, len); break; default: printf("Parse: Unknown type %d, len=%d (code=%#02X)\n", el[0]>>3, len, el[0]); } result = item; return end; } int SDPManager::parseRsp(const unsigned char*rsp, int len) { //unsigned tid = rsp[2] + ((unsigned)rsp[1]<<8); unsigned parlen = rsp[4] + ((unsigned)rsp[3]<<8); // printf("ParseRsp: tid=%04X, parlen=%d ", tid, parlen); unsigned cont = 0; switch (rsp[0]) { case 1: {//errorRsp unsigned errorcode = rsp[6] + ((unsigned)rsp[5]<<8); if (parlen > 2) { printf("ErrorInfo (%d bytes) for error %d is available\n", parlen-2, errorcode); } if (ErrorResponse) ErrorResponse(errorcode); return errorcode; } //break; case 3: { //servicesearchRsp //unsigned total = rsp[6] + ((unsigned)rsp[5]<<8); unsigned current = rsp[8] + ((unsigned)rsp[7]<<8); cont = rsp[9+4*current]; // printf("total=%d, current=%d, cont=%d\n", total, current, cont); if (cont) break; //linear list of 32bit service-handles for (int i = 0; i < current; i++) { unsigned result = 0; for (int j = 0; j< 4; j++) result = (result<<8) + rsp[9 + 4*i + j]; // printf("SDP Search handle %08X\n", result); services.insert(pair<unsigned, serv_rec*>(result, 0)); } if (ServiceSearchResponse) ServiceSearchResponse(); } break; case 5: { //serviceattributeRsp if (tree) delete tree; unsigned count = rsp[6] + ((unsigned)rsp[5]<<8); cont = rsp[7+count]; if (cont) break; // printf("pos=%d, count=%d parsing...\n", 7, count); serv_rec *serv = new serv_rec; unsigned p = parse(rsp+7, count, tree, serv); unsigned key = (*serv)[0]->asUnsigned(); services[key] = serv; // printf("...parsing done, pos=%d, cont=%d\n", p, cont); if (ServiceAttributeResponse) ServiceAttributeResponse(serv); } break; case 7: { //servicesearchattributeRsp if (tree) delete tree; unsigned count = rsp[6] + ((unsigned)rsp[5]<<8); cont = rsp[7+count]; if (cont) break; unsigned pos = 7; while (rsp[pos]>>3 == sdp_data::SEQUENCE) { unsigned len = length(rsp, pos); printf("pos=%d, count=%d, parsing...\n", pos, len); serv_rec *serv = new serv_rec; pos = parse(rsp+pos, len, tree, serv); unsigned key = (*serv)[0]->asUnsigned(); services[key] = serv; } printf("...parsing done, pos=%d\n", pos); if (ServiceSearchAttributeResponse) ServiceSearchAttributeResponse(); } break; default: printf("Unknown SDP response type %02X\n", rsp[0]); break; } if (cont) printf("Continuation not supported (yet)\n"); return 0; }