An Overlay-based
Virtual Network Substrate
SpoVNet

source: source/ariba/utility/bootstrap/modules/bluetoothsdp/BluetoothSdp.cpp @ 5649

Last change on this file since 5649 was 5649, checked in by Christoph Mayer, 10 years ago
File size: 12.9 KB
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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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12// modification, are permitted provided that the following conditions are
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14//
15// 1. Redistributions of source code must retain the above copyright
16// notice, this list of conditions and the following disclaimer.
17// 2. Redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution.
20//
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22// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR
25// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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30// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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
41#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
42
43// Attribute descriptors for SDP
44// base was chosen randomly
45#define SDP_SPOVNET_BASE                        0x4000
46#define SDP_ATTR_SPOVNET_NAME           0x0000 + SDP_SPOVNET_BASE
47#define SDP_ATTR_SPOVNET_INFO1          0x0001 + SDP_SPOVNET_BASE
48#define SDP_ATTR_SPOVNET_INFO2          0x0002 + SDP_SPOVNET_BASE
49#define SDP_ATTR_SPOVNET_INFO3          0x0003 + SDP_SPOVNET_BASE
50
51// The SpoVNet unique identifier, this should be the same for all SpoVNet implementations
52const uint8_t svc_uuid_int[] = {0x59, 0x29, 0x24, 0x34, 0x69, 0x42, 0x11, 0xde, 0x94,
53                0x3e, 0x00, 0x21, 0x5d, 0xb4, 0xd8, 0x54};
54
55const char *service_name = "SpoVNet";
56const char *svc_dsc = "www.ariba-underlay.org";
57const char *service_prov = "ITM Uni Karlsruhe";
58
59#endif // HAVE_BLUETOOTH_BLUETOOTH_H
60
61
62namespace ariba {
63namespace utility {
64use_logging_cpp(BluetoothSdp);
65
66BluetoothSdp::BluetoothSdp(BootstrapInformationCallback* _callback) :
67        BootstrapModule(_callback), scan_timer_(io_service_) {
68        srand( time(NULL) );
69#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
70
71        // This can be ignored, as the channel we really be saved in one
72        // of the info strings (as an attribute)
73        channel_ = 1;
74
75#endif // HAVE_BLUETOOTH_BLUETOOTH_H
76}
77
78BluetoothSdp::~BluetoothSdp() {
79}
80
81string BluetoothSdp::getName() {
82        return "BluetoothSdp";
83}
84
85string BluetoothSdp::getInformation() {
86        return "bootstrap module based on bluetooth service discovery protocol";
87}
88
89bool BluetoothSdp::isFunctional() {
90#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
91        return true;
92#else
93        return false;
94#endif
95}
96
97void BluetoothSdp::start() {
98#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
99
100        /*
101         * Initializes and forks the scanner.
102         */
103
104        io_service_.post(boost::bind(&BluetoothSdp::bt_scan, this));
105        t_ = boost::thread(boost::bind(&boost::asio::io_service::run, &io_service_));
106
107#endif // HAVE_BLUETOOTH_BLUETOOTH_H
108}
109
110void BluetoothSdp::stop() {
111#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
112
113        /*
114         * Stops the scanner.
115         */
116
117        // not sure if this is thread safe
118        io_service_.stop();
119        t_.join();
120
121        if(sdp_session_ != NULL)
122                sdp_close(sdp_session_);
123
124#endif // HAVE_BLUETOOTH_BLUETOOTH_H
125}
126
127void BluetoothSdp::publishService(string name, string info1, string info2,
128                string info3) {
129#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
130
131        /*
132         * Publishes an SpoVNet SDP Service and
133         * adds the arguments as info attributes.
134         */
135
136        logging_debug("registering SDP service");
137
138        uint8_t rfcomm_channel = channel_;
139
140        uuid_t root_uuid, l2cap_uuid, rfcomm_uuid, svc_uuid, svc_class_uuid;
141        sdp_list_t *l2cap_list = 0, *rfcomm_list = 0, *root_list = 0, *proto_list =
142                0, *access_proto_list = 0, *svc_class_list = 0, *profile_list = 0;
143        sdp_data_t *channel = 0;
144        sdp_profile_desc_t profile;
145        sdp_record_t record = {0};
146        sdp_session_ = 0;
147
148        if((name.length() > 256) || (info1.length() > 256) || (info2.length() > 256) || (info3.length() > 256)) {
149                logging_error("string argument too long, max size is 256");
150                return;
151        }
152
153        // prepare the info attribute buffers
154        //string namebuf, info1buf, info2buf, info3buf;
155        uint8_t namelen, info1len, info2len, info3len;
156
157        namelen = (uint8_t)name.length();
158        info1len = (uint8_t)info1.length();
159        info2len = (uint8_t)info2.length();
160        info3len = (uint8_t)info3.length();
161
162        // set the general service ID
163        sdp_uuid128_create(&svc_uuid, &svc_uuid_int);
164        sdp_set_service_id(&record, svc_uuid);
165
166        // set the service class
167        sdp_uuid16_create(&svc_class_uuid, SERIAL_PORT_SVCLASS_ID);
168        svc_class_list = sdp_list_append(0, &svc_class_uuid);
169        sdp_set_service_classes(&record, svc_class_list);
170
171        // set the Bluetooth profile information
172        sdp_uuid16_create(&profile.uuid, SERIAL_PORT_PROFILE_ID);
173        profile.version = 0x0100;
174        profile_list = sdp_list_append(0, &profile);
175        sdp_set_profile_descs(&record, profile_list);
176
177        // make the service record publicly browsable
178        sdp_uuid16_create(&root_uuid, PUBLIC_BROWSE_GROUP);
179        root_list = sdp_list_append(0, &root_uuid);
180        sdp_set_browse_groups(&record, root_list);
181
182        // set l2cap informatiint argc, char* argv[]on
183        sdp_uuid16_create(&l2cap_uuid, L2CAP_UUID);
184        l2cap_list = sdp_list_append(0, &l2cap_uuid);
185        proto_list = sdp_list_append(0, l2cap_list);
186
187        // register the RFCOMM channel for RFCOMM sockets
188        sdp_uuid16_create(&rfcomm_uuid, RFCOMM_UUID);
189        channel = sdp_data_alloc(SDP_UINT8, &rfcomm_channel);
190        rfcomm_list = sdp_list_append(0, &rfcomm_uuid);
191        sdp_list_append(rfcomm_list, channel);
192        sdp_list_append(proto_list, rfcomm_list);
193
194        access_proto_list = sdp_list_append(0, proto_list);
195        sdp_set_access_protos(&record, access_proto_list);
196
197        // set the name, provider, and description
198        sdp_set_info_attr(&record, service_name, service_prov, svc_dsc);
199
200        // add the spovnet attributes
201        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_NAME, SDP_TEXT_STR8,
202                        name.data());
203
204        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO1, SDP_TEXT_STR8,
205                        info1.data());
206
207        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO2, SDP_TEXT_STR8,
208                        info2.data());
209
210        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO3, SDP_TEXT_STR8,
211                        info3.data());
212
213        // connect to the local SDP server, register the service record
214        if( sdp_session_ == NULL ){
215                sdp_session_ = sdp_connect(BDADDR_ANY, BDADDR_LOCAL, SDP_RETRY_IF_BUSY);
216        }
217
218        if (sdp_session_ == NULL) {
219                logging_error( "something is wrong with your SDP server, nothing registered: " << strerror(errno) );
220        } else {
221                int ret = sdp_record_register(sdp_session_, &record, 0);
222
223                if(ret < 0){
224                        logging_error("failed registering sdp record: " << strerror(errno));
225                }else{
226                        logging_debug("sdp record registered using session " << sdp_session_);
227                }
228        }
229
230        // cleanup
231        sdp_data_free(channel);
232        sdp_list_free(l2cap_list, 0);
233        sdp_list_free(rfcomm_list, 0);
234        sdp_list_free(root_list, 0);
235        sdp_list_free(access_proto_list, 0);
236        sdp_list_free(svc_class_list, 0);
237        sdp_list_free(profile_list, 0);
238
239#endif // HAVE_BLUETOOTH_BLUETOOTH_H
240}
241
242void BluetoothSdp::revokeService(string name) {
243#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
244
245        logging_debug("unregistering SDP service");
246        sdp_close(sdp_session_);
247
248#endif // HAVE_BLUETOOTH_BLUETOOTH_H
249}
250
251#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
252
253void BluetoothSdp::bt_scan() {
254
255        //
256        // scan for devices if we have no active rfcomm connections running.
257        // otherwise we would break existing connections due to chipping seq
258        //
259
260        if(!haveConnections()){
261
262                /*
263                 * Scans for other bluetooth devices and starts a SDP search on them.
264                 */
265
266                logging_debug("scanning for peers");
267
268                inquiry_info *ii = NULL;
269                int max_rsp, num_rsp;
270                int dev_id, sock, len, flags;
271                int i;
272
273                bdaddr_t address;
274                uint8_t channel;
275
276                dev_id = hci_get_route(NULL);
277                sock = hci_open_dev(dev_id);
278                if (dev_id < 0 || sock < 0) {
279                        logging_error("opening socket for device "
280                                        << dev_id << " failed. can not scan for peers: " << strerror(errno));
281                        return;
282                }
283
284                len = 8;
285                max_rsp = 255;
286                flags = IREQ_CACHE_FLUSH;
287                ii = (inquiry_info*) malloc(max_rsp * sizeof(inquiry_info));
288
289                num_rsp = hci_inquiry(dev_id, len, max_rsp, NULL, &ii, flags);
290                if (num_rsp < 0)
291                        logging_error("hci_inquiry failed with " << num_rsp << ": " << strerror(errno));
292
293                for (i = 0; i < num_rsp; i++) {
294                        address = (ii + i)->bdaddr;
295
296                        string saddress = ba2string(&address);
297                        string sname = ba2name(&address, sock);
298
299                        logging_debug("found peer [" << saddress << "] [" << sname << "]");
300                        sdp_search( address, sname );
301                }
302
303                free(ii);
304                close(sock);
305
306        } else {
307                logging_debug("have active rfcomm connectinos, not searching");
308        }
309
310        int nextscan = (rand() % 30) + 5;
311        logging_debug("next sdp scan try in " << nextscan << " seconds");
312
313        scan_timer_.expires_from_now( boost::posix_time::seconds(nextscan) );
314        scan_timer_.async_wait( boost::bind(&BluetoothSdp::bt_scan, this) );
315}
316
317void BluetoothSdp::sdp_search(bdaddr_t target, string devicename) {
318
319        /*
320         * Searches target for SDP records with the SpoVnet uuid
321         * and extracts its info attributes.
322         */
323
324        int status;
325        uuid_t svc_uuid;
326        sdp_list_t *response_list, *search_list, *attrid_list;
327        sdp_session_t *session = NULL;
328        uint32_t range = 0x0000ffff;
329        uint8_t port = 0;
330
331        // connect to the SDP server running on the remote machine
332        logging_debug("querying services from bt device ["
333                        << ba2string(&target) << "] [" << devicename << "]");
334
335        // prepare the buffers for the attributes
336        char name[256], info1[256], info2[256], info3[256];
337
338        session = sdp_connect(BDADDR_ANY, &target, SDP_RETRY_IF_BUSY);
339
340        if (session == NULL) {
341                logging_error("failed to connect to SDP server at "
342                                << ba2string(&target) << ": " << strerror(errno));
343                return;
344        }
345
346        sdp_uuid128_create(&svc_uuid, &svc_uuid_int);
347        search_list = sdp_list_append(0, &svc_uuid);
348        attrid_list = sdp_list_append(0, &range);
349
350        // get a list of service records that have UUID uuid_
351        response_list = NULL;
352        status = sdp_service_search_attr_req(session, search_list,
353                        SDP_ATTR_REQ_RANGE, attrid_list, &response_list);
354
355        if (status == 0) {
356                sdp_list_t *proto_list = NULL;
357                sdp_list_t *r = response_list;
358
359                // go through each of the service records
360                for ( ; r != NULL; r = r->next) {
361                        sdp_record_t *rec = (sdp_record_t*) r->data;
362
363                        // get a list of the protocol sequences
364                        if (sdp_get_access_protos(rec, &proto_list) == 0) {
365
366                                // get the RFCOMM port number
367                                port = sdp_get_proto_port(proto_list, RFCOMM_UUID);
368
369                                sdp_list_free(proto_list, 0);
370
371                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_NAME, (char*)&name, 256);
372                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO1, (char*)&info1, 256);
373                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO2, (char*)&info2, 256);
374                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO3, (char*)&info3, 256);
375
376                                logging_info("Remote peer name is: " << name);
377                                logging_info("Remote peer info1 is: " << info1);
378                                logging_info("Remote peer info2 is: " << info2);
379                                logging_info("Remote peer info3 is: " << info3);
380
381                                // Callback
382                                callback->onBootstrapServiceFound(name, info1, info2, info3);
383                        }
384                        sdp_record_free(rec);
385                }
386        } else {
387                logging_error("sdp_service_search_attr_req failed with timeout: " << strerror(errno));
388        }
389
390        sdp_list_free(response_list, 0);
391        sdp_list_free(search_list, 0);
392        sdp_list_free(attrid_list, 0);
393        sdp_close(session);
394}
395
396string BluetoothSdp::ba2string(bdaddr_t* ba) {
397        /*
398         * Returns a string holding the bt adress in human readable form.
399         */
400        char addr[32] = { 0 };
401        char str[32] = { 0 };
402        ba2str(ba, str);
403        string result = str;
404        return result;
405}
406
407string BluetoothSdp::ba2name(bdaddr_t* ba, int sock){
408
409        char name[256] = {0};
410        memset(name, 0, sizeof(name));
411
412        if( hci_read_remote_name(sock, ba, sizeof(name), name, 0) < 0 )
413                strcpy(name, "unknown");
414
415        string result = name;
416        return result;
417}
418
419bool BluetoothSdp::haveConnections(){
420
421        struct hci_conn_list_req* cl = NULL;
422        struct hci_conn_info* ci = NULL;
423
424        int btsock = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
425        if(btsock <  0){
426                logging_error("failed getting bluetooth raw socket");
427                return true; // return true to be safe here and not perform sdp scan
428        }
429
430        cl = (struct hci_conn_list_req*)malloc(10 * sizeof(struct hci_conn_info) + sizeof(struct hci_conn_list_req));
431
432        cl->dev_id = hci_get_route(NULL);;
433        cl->conn_num = 10;
434        ci = cl->conn_info;
435
436        if(ioctl(btsock, HCIGETCONNLIST, (void*)cl)){
437                logging_warn("could not get active rfcomm connections");
438                return true; // return true to be safe here and not perform sdp scan
439        }
440
441        bool haveconn = (cl->conn_num > 0);
442        logging_debug("we have " << cl->conn_num << " active hci connections");
443        free(cl);
444        close(btsock);
445
446        return haveconn;
447}
448
449#endif // HAVE_BLUETOOTH_BLUETOOTH_H
450
451}} //namespace ariba, utility
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