An Overlay-based
Virtual Network Substrate
SpoVNet

source: source/ariba/utility/bootstrap/modules/bluetoothsdp/BluetoothSdp.cpp @ 5967

Last change on this file since 5967 was 5967, checked in by Christoph Mayer, 10 years ago

rfcomm sdp fixing

File size: 13.2 KB
Line 
1// [License]
2// The Ariba-Underlay Copyright
3//
4// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
5//
6// Institute of Telematics
7// UniversitÀt Karlsruhe (TH)
8// Zirkel 2, 76128 Karlsruhe
9// Germany
10//
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14//
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18// notice, this list of conditions and the following disclaimer in the
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20//
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23// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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25// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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32//
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34// are those of the authors and should not be interpreted as representing
35// official policies, either expressed or implied, of the Institute of
36// Telematics.
37// [License]
38
39#include "BluetoothSdp.h"
40#include "ariba/overlay/OverlayBootstrap.h"
41
42#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
43
44// Attribute descriptors for SDP
45// base was chosen randomly
46#define SDP_SPOVNET_BASE                        0x4000
47#define SDP_ATTR_SPOVNET_NAME           0x0000 + SDP_SPOVNET_BASE
48#define SDP_ATTR_SPOVNET_INFO1          0x0001 + SDP_SPOVNET_BASE
49#define SDP_ATTR_SPOVNET_INFO2          0x0002 + SDP_SPOVNET_BASE
50#define SDP_ATTR_SPOVNET_INFO3          0x0003 + SDP_SPOVNET_BASE
51
52// The SpoVNet unique identifier, this should be the same for all SpoVNet implementations
53const uint8_t svc_uuid_int[] = {0x59, 0x29, 0x24, 0x34, 0x69, 0x42, 0x11, 0xde, 0x94,
54                0x3e, 0x00, 0x21, 0x5d, 0xb4, 0xd8, 0x54};
55
56const char *service_name = "SpoVNet";
57const char *svc_dsc = "www.ariba-underlay.org";
58const char *service_prov = "ITM Uni Karlsruhe";
59
60#endif // HAVE_BLUETOOTH_BLUETOOTH_H
61
62
63namespace ariba {
64namespace utility {
65
66use_logging_cpp(BluetoothSdp);
67OverlayBootstrap* BluetoothSdp::CONNECTION_CHECKER = NULL;
68
69BluetoothSdp::BluetoothSdp(BootstrapInformationCallback* _callback) :
70        BootstrapModule(_callback), scan_timer_(io_service_) {
71        srand( time(NULL) );
72#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
73
74        // This can be ignored, as the channel we really be saved in one
75        // of the info strings (as an attribute)
76        channel_ = 1;
77
78#endif // HAVE_BLUETOOTH_BLUETOOTH_H
79}
80
81BluetoothSdp::~BluetoothSdp() {
82}
83
84string BluetoothSdp::getName() {
85        return "BluetoothSdp";
86}
87
88string BluetoothSdp::getInformation() {
89        return "bootstrap module based on bluetooth service discovery protocol";
90}
91
92bool BluetoothSdp::isFunctional() {
93#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
94        return true;
95#else
96        return false;
97#endif
98}
99
100void BluetoothSdp::start() {
101#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
102
103        /*
104         * Initializes and forks the scanner.
105         */
106
107        io_service_.post(boost::bind(&BluetoothSdp::bt_scan, this));
108        t_ = boost::thread(boost::bind(&boost::asio::io_service::run, &io_service_));
109
110#endif // HAVE_BLUETOOTH_BLUETOOTH_H
111}
112
113void BluetoothSdp::stop() {
114#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
115
116        /*
117         * Stops the scanner.
118         */
119
120        // not sure if this is thread safe
121        io_service_.stop();
122        t_.join();
123
124        if(sdp_session_ != NULL)
125                sdp_close(sdp_session_);
126
127#endif // HAVE_BLUETOOTH_BLUETOOTH_H
128}
129
130void BluetoothSdp::publishService(string name, string info1, string info2,
131                string info3) {
132#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
133
134        /*
135         * Publishes an SpoVNet SDP Service and
136         * adds the arguments as info attributes.
137         */
138
139        logging_debug("registering SDP service");
140
141        uint8_t rfcomm_channel = channel_;
142
143        uuid_t root_uuid, l2cap_uuid, rfcomm_uuid, svc_uuid, svc_class_uuid;
144        sdp_list_t *l2cap_list = 0, *rfcomm_list = 0, *root_list = 0, *proto_list =
145                0, *access_proto_list = 0, *svc_class_list = 0, *profile_list = 0;
146        sdp_data_t *channel = 0;
147        sdp_profile_desc_t profile;
148        sdp_record_t record = {0};
149        sdp_session_ = 0;
150
151        if((name.length() > 256) || (info1.length() > 256) || (info2.length() > 256) || (info3.length() > 256)) {
152                logging_error("string argument too long, max size is 256");
153                return;
154        }
155
156        // prepare the info attribute buffers
157        //string namebuf, info1buf, info2buf, info3buf;
158        uint8_t namelen, info1len, info2len, info3len;
159
160        namelen = (uint8_t)name.length();
161        info1len = (uint8_t)info1.length();
162        info2len = (uint8_t)info2.length();
163        info3len = (uint8_t)info3.length();
164
165        // set the general service ID
166        sdp_uuid128_create(&svc_uuid, &svc_uuid_int);
167        sdp_set_service_id(&record, svc_uuid);
168
169        // set the service class
170        sdp_uuid16_create(&svc_class_uuid, SERIAL_PORT_SVCLASS_ID);
171        svc_class_list = sdp_list_append(0, &svc_class_uuid);
172        sdp_set_service_classes(&record, svc_class_list);
173
174        // set the Bluetooth profile information
175        sdp_uuid16_create(&profile.uuid, SERIAL_PORT_PROFILE_ID);
176        profile.version = 0x0100;
177        profile_list = sdp_list_append(0, &profile);
178        sdp_set_profile_descs(&record, profile_list);
179
180        // make the service record publicly browsable
181        sdp_uuid16_create(&root_uuid, PUBLIC_BROWSE_GROUP);
182        root_list = sdp_list_append(0, &root_uuid);
183        sdp_set_browse_groups(&record, root_list);
184
185        // set l2cap informatiint argc, char* argv[]on
186        sdp_uuid16_create(&l2cap_uuid, L2CAP_UUID);
187        l2cap_list = sdp_list_append(0, &l2cap_uuid);
188        proto_list = sdp_list_append(0, l2cap_list);
189
190        // register the RFCOMM channel for RFCOMM sockets
191        sdp_uuid16_create(&rfcomm_uuid, RFCOMM_UUID);
192        channel = sdp_data_alloc(SDP_UINT8, &rfcomm_channel);
193        rfcomm_list = sdp_list_append(0, &rfcomm_uuid);
194        sdp_list_append(rfcomm_list, channel);
195        sdp_list_append(proto_list, rfcomm_list);
196
197        access_proto_list = sdp_list_append(0, proto_list);
198        sdp_set_access_protos(&record, access_proto_list);
199
200        // set the name, provider, and description
201        sdp_set_info_attr(&record, service_name, service_prov, svc_dsc);
202
203        // add the spovnet attributes
204        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_NAME, SDP_TEXT_STR8,
205                        name.data());
206
207        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO1, SDP_TEXT_STR8,
208                        info1.data());
209
210        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO2, SDP_TEXT_STR8,
211                        info2.data());
212
213        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO3, SDP_TEXT_STR8,
214                        info3.data());
215
216        // connect to the local SDP server, register the service record
217        if( sdp_session_ == NULL ){
218                sdp_session_ = sdp_connect(BDADDR_ANY, BDADDR_LOCAL, SDP_RETRY_IF_BUSY);
219        }
220
221        if (sdp_session_ == NULL) {
222                logging_error( "something is wrong with your SDP server, nothing registered: " << strerror(errno) );
223        } else {
224                int ret = sdp_record_register(sdp_session_, &record, 0);
225
226                if(ret < 0){
227                        logging_error("failed registering sdp record: " << strerror(errno));
228                }else{
229                        logging_debug("sdp record registered using session " << sdp_session_);
230                }
231        }
232
233        // cleanup
234        sdp_data_free(channel);
235        sdp_list_free(l2cap_list, 0);
236        sdp_list_free(rfcomm_list, 0);
237        sdp_list_free(root_list, 0);
238        sdp_list_free(access_proto_list, 0);
239        sdp_list_free(svc_class_list, 0);
240        sdp_list_free(profile_list, 0);
241
242#endif // HAVE_BLUETOOTH_BLUETOOTH_H
243}
244
245void BluetoothSdp::revokeService(string name) {
246#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
247
248        logging_debug("unregistering SDP service");
249        sdp_close(sdp_session_);
250
251#endif // HAVE_BLUETOOTH_BLUETOOTH_H
252}
253
254#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
255
256void BluetoothSdp::bt_scan() {
257
258        //
259        // scan for devices if we have no active rfcomm connections running.
260        // otherwise we would break existing connections due to chipping seq
261        //
262
263        if(!haveConnections()){
264
265                /*
266                 * Scans for other bluetooth devices and starts a SDP search on them.
267                 */
268
269                logging_debug("scanning for peers");
270
271                inquiry_info *ii = NULL;
272                int max_rsp, num_rsp;
273                int dev_id, sock, len, flags;
274                int i;
275
276                bdaddr_t address;
277                uint8_t channel;
278
279                dev_id = hci_get_route(NULL);
280                sock = hci_open_dev(dev_id);
281                if (dev_id < 0 || sock < 0) {
282                        logging_error("opening socket for device "
283                                        << dev_id << " failed. can not scan for peers: " << strerror(errno));
284                        return;
285                }
286
287                len = 8;
288                max_rsp = 255;
289                flags = IREQ_CACHE_FLUSH;
290                ii = (inquiry_info*) malloc(max_rsp * sizeof(inquiry_info));
291
292                num_rsp = hci_inquiry(dev_id, len, max_rsp, NULL, &ii, flags);
293                if (num_rsp < 0)
294                        logging_error("hci_inquiry failed with " << num_rsp << ": " << strerror(errno));
295
296                for (i = 0; i < num_rsp; i++) {
297                        address = (ii + i)->bdaddr;
298
299                        string saddress = ba2string(&address);
300                        string sname = ba2name(&address, sock);
301
302                        logging_debug("found peer [" << saddress << "] [" << sname << "]");
303                        sdp_search( address, sname );
304                }
305
306                free(ii);
307                close(sock);
308
309        } else {
310                logging_debug("have active connections, no sdp searching");
311        }
312
313        int nextscan = (rand() % 10) + 5;
314        logging_debug("next sdp scan try in " << nextscan << " seconds");
315
316        scan_timer_.expires_from_now( boost::posix_time::seconds(nextscan) );
317        scan_timer_.async_wait( boost::bind(&BluetoothSdp::bt_scan, this) );
318}
319
320void BluetoothSdp::sdp_search(bdaddr_t target, string devicename) {
321
322        /*
323         * Searches target for SDP records with the SpoVnet uuid
324         * and extracts its info attributes.
325         */
326
327        int status;
328        uuid_t svc_uuid;
329        sdp_list_t *response_list, *search_list, *attrid_list;
330        sdp_session_t *session = NULL;
331        uint32_t range = 0x0000ffff;
332        uint8_t port = 0;
333
334        // connect to the SDP server running on the remote machine
335        logging_debug("querying services from bt device ["
336                        << ba2string(&target) << "] [" << devicename << "]");
337
338        // prepare the buffers for the attributes
339        char name[256], info1[256], info2[256], info3[256];
340
341        session = sdp_connect(BDADDR_ANY, &target, SDP_RETRY_IF_BUSY);
342
343        if (session == NULL) {
344                logging_error("failed to connect to SDP server at "
345                                << ba2string(&target) << ": " << strerror(errno));
346                return;
347        }
348
349        sdp_uuid128_create(&svc_uuid, &svc_uuid_int);
350        search_list = sdp_list_append(0, &svc_uuid);
351        attrid_list = sdp_list_append(0, &range);
352
353        // get a list of service records that have UUID uuid_
354        response_list = NULL;
355        status = sdp_service_search_attr_req(session, search_list,
356                        SDP_ATTR_REQ_RANGE, attrid_list, &response_list);
357
358        if (status == 0) {
359                sdp_list_t *proto_list = NULL;
360                sdp_list_t *r = response_list;
361
362                // go through each of the service records
363                for ( ; r != NULL; r = r->next) {
364                        sdp_record_t *rec = (sdp_record_t*) r->data;
365
366                        // get a list of the protocol sequences
367                        if (sdp_get_access_protos(rec, &proto_list) == 0) {
368
369                                // get the RFCOMM port number
370                                port = sdp_get_proto_port(proto_list, RFCOMM_UUID);
371
372                                sdp_list_free(proto_list, 0);
373
374                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_NAME, (char*)&name, 256);
375                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO1, (char*)&info1, 256);
376                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO2, (char*)&info2, 256);
377                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO3, (char*)&info3, 256);
378
379                                logging_info("Remote peer name is: " << name);
380                                logging_info("Remote peer info1 is: " << info1);
381                                logging_info("Remote peer info2 is: " << info2);
382                                logging_info("Remote peer info3 is: " << info3);
383
384                                // Callback
385                                callback->onBootstrapServiceFound(name, info1, info2, info3);
386                        }
387                        sdp_record_free(rec);
388                }
389        } else {
390                logging_error("sdp_service_search_attr_req failed with timeout: " << strerror(errno));
391        }
392
393        sdp_list_free(response_list, 0);
394        sdp_list_free(search_list, 0);
395        sdp_list_free(attrid_list, 0);
396        sdp_close(session);
397}
398
399string BluetoothSdp::ba2string(bdaddr_t* ba) {
400        /*
401         * Returns a string holding the bt adress in human readable form.
402         */
403        char addr[32] = { 0 };
404        char str[32] = { 0 };
405        ba2str(ba, str);
406        string result = str;
407        return result;
408}
409
410string BluetoothSdp::ba2name(bdaddr_t* ba, int sock){
411
412        char name[256] = {0};
413        memset(name, 0, sizeof(name));
414
415        if( hci_read_remote_name(sock, ba, sizeof(name), name, 0) < 0 )
416                strcpy(name, "unknown");
417
418        string result = name;
419        return result;
420}
421
422bool BluetoothSdp::haveConnections(){
423
424        // TODO: currently we check for overlay connectivity
425
426        if(CONNECTION_CHECKER == NULL) return false;
427        return CONNECTION_CHECKER->haveOverlayConnections();
428
429
430        /* TODO: this will check for rfcomm connections
431        struct hci_conn_list_req* cl = NULL;
432        struct hci_conn_info* ci = NULL;
433
434        int btsock = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
435        if(btsock <  0){
436                logging_error("failed getting bluetooth raw socket");
437                return true; // return true to be safe here and not perform sdp scan
438        }
439
440        cl = (struct hci_conn_list_req*)malloc(10 * sizeof(struct hci_conn_info) + sizeof(struct hci_conn_list_req));
441
442        cl->dev_id = hci_get_route(NULL);;
443        cl->conn_num = 10;
444        ci = cl->conn_info;
445
446        if(ioctl(btsock, HCIGETCONNLIST, (void*)cl)){
447                logging_warn("could not get active rfcomm connections");
448                return true; // return true to be safe here and not perform sdp scan
449        }
450
451        bool haveconn = (cl->conn_num > 0);
452        logging_debug("we have " << cl->conn_num << " active hci connections");
453        free(cl);
454        close(btsock);
455
456        return haveconn;
457        */
458}
459
460#endif // HAVE_BLUETOOTH_BLUETOOTH_H
461
462}} //namespace ariba, utility
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