An Overlay-based
Virtual Network Substrate
SpoVNet

source: source/ariba/utility/bootstrap/modules/bluetoothsdp/BluetoothSdp.cpp @ 6919

Last change on this file since 6919 was 6919, checked in by mies, 10 years ago

Fixed tons of warnings when using CXXFLAGS="-Wall"!

File size: 13.3 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//
11// Redistribution and use in source and binary forms, with or without
12// modification, are permitted provided that the following conditions are
13// met:
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//
21// THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
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
28// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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//
33// The views and conclusions contained in the software and documentation
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
66static bdaddr_t bd_addr_any = {{0, 0, 0, 0, 0, 0}};
67static bdaddr_t bd_addr_local = {{0, 0, 0, 0xff, 0xff, 0xff}};
68
69use_logging_cpp(BluetoothSdp);
70OverlayBootstrap* BluetoothSdp::CONNECTION_CHECKER = NULL;
71
72BluetoothSdp::BluetoothSdp(BootstrapInformationCallback* _callback) :
73        BootstrapModule(_callback), scan_timer_(io_service_) {
74        srand( time(NULL) );
75#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
76
77        // This can be ignored, as the channel we really be saved in one
78        // of the info strings (as an attribute)
79        channel_ = 1;
80
81#endif // HAVE_BLUETOOTH_BLUETOOTH_H
82}
83
84BluetoothSdp::~BluetoothSdp() {
85}
86
87string BluetoothSdp::getName() {
88        return "BluetoothSdp";
89}
90
91string BluetoothSdp::getInformation() {
92        return "bootstrap module based on bluetooth service discovery protocol";
93}
94
95bool BluetoothSdp::isFunctional() {
96#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
97        return true;
98#else
99        return false;
100#endif
101}
102
103void BluetoothSdp::start() {
104#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
105
106        /*
107         * Initializes and forks the scanner.
108         */
109
110        io_service_.post(boost::bind(&BluetoothSdp::bt_scan, this));
111        t_ = boost::thread(boost::bind(&boost::asio::io_service::run, &io_service_));
112
113#endif // HAVE_BLUETOOTH_BLUETOOTH_H
114}
115
116void BluetoothSdp::stop() {
117#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
118
119        /*
120         * Stops the scanner.
121         */
122
123        // not sure if this is thread safe
124        io_service_.stop();
125        t_.join();
126
127        if(sdp_session_ != NULL)
128                sdp_close(sdp_session_);
129
130#endif // HAVE_BLUETOOTH_BLUETOOTH_H
131}
132
133void BluetoothSdp::publishService(string name, string info1, string info2,
134                string info3) {
135#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
136
137        /*
138         * Publishes an SpoVNet SDP Service and
139         * adds the arguments as info attributes.
140         */
141
142        logging_debug("registering SDP service");
143
144        uint8_t rfcomm_channel = channel_;
145
146        uuid_t root_uuid, l2cap_uuid, rfcomm_uuid, svc_uuid, svc_class_uuid;
147        sdp_list_t *l2cap_list = 0, *rfcomm_list = 0, *root_list = 0, *proto_list =
148                0, *access_proto_list = 0, *svc_class_list = 0, *profile_list = 0;
149        sdp_data_t *channel = 0;
150        sdp_profile_desc_t profile;
151        sdp_record_t record = {0};
152        sdp_session_ = 0;
153
154        if((name.length() > 256) || (info1.length() > 256) || (info2.length() > 256) || (info3.length() > 256)) {
155                logging_error("string argument too long, max size is 256");
156                return;
157        }
158
159        // prepare the info attribute buffers
160        //string namebuf, info1buf, info2buf, info3buf;
161        uint8_t namelen, info1len, info2len, info3len;
162
163        namelen = (uint8_t)name.length();
164        info1len = (uint8_t)info1.length();
165        info2len = (uint8_t)info2.length();
166        info3len = (uint8_t)info3.length();
167
168        // set the general service ID
169        sdp_uuid128_create(&svc_uuid, &svc_uuid_int);
170        sdp_set_service_id(&record, svc_uuid);
171
172        // set the service class
173        sdp_uuid16_create(&svc_class_uuid, SERIAL_PORT_SVCLASS_ID);
174        svc_class_list = sdp_list_append(0, &svc_class_uuid);
175        sdp_set_service_classes(&record, svc_class_list);
176
177        // set the Bluetooth profile information
178        sdp_uuid16_create(&profile.uuid, SERIAL_PORT_PROFILE_ID);
179        profile.version = 0x0100;
180        profile_list = sdp_list_append(0, &profile);
181        sdp_set_profile_descs(&record, profile_list);
182
183        // make the service record publicly browsable
184        sdp_uuid16_create(&root_uuid, PUBLIC_BROWSE_GROUP);
185        root_list = sdp_list_append(0, &root_uuid);
186        sdp_set_browse_groups(&record, root_list);
187
188        // set l2cap informatiint argc, char* argv[]on
189        sdp_uuid16_create(&l2cap_uuid, L2CAP_UUID);
190        l2cap_list = sdp_list_append(0, &l2cap_uuid);
191        proto_list = sdp_list_append(0, l2cap_list);
192
193        // register the RFCOMM channel for RFCOMM sockets
194        sdp_uuid16_create(&rfcomm_uuid, RFCOMM_UUID);
195        channel = sdp_data_alloc(SDP_UINT8, &rfcomm_channel);
196        rfcomm_list = sdp_list_append(0, &rfcomm_uuid);
197        sdp_list_append(rfcomm_list, channel);
198        sdp_list_append(proto_list, rfcomm_list);
199
200        access_proto_list = sdp_list_append(0, proto_list);
201        sdp_set_access_protos(&record, access_proto_list);
202
203        // set the name, provider, and description
204        sdp_set_info_attr(&record, service_name, service_prov, svc_dsc);
205
206        // add the spovnet attributes
207        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_NAME, SDP_TEXT_STR8,
208                        name.data());
209
210        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO1, SDP_TEXT_STR8,
211                        info1.data());
212
213        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO2, SDP_TEXT_STR8,
214                        info2.data());
215
216        sdp_attr_add_new(&record, SDP_ATTR_SPOVNET_INFO3, SDP_TEXT_STR8,
217                        info3.data());
218
219        // connect to the local SDP server, register the service record
220        if( sdp_session_ == NULL ){
221                sdp_session_ = sdp_connect(&bd_addr_any, &bd_addr_local, SDP_RETRY_IF_BUSY);
222        }
223
224        if (sdp_session_ == NULL) {
225                logging_error( "something is wrong with your SDP server, nothing registered: " << strerror(errno) );
226        } else {
227                int ret = sdp_record_register(sdp_session_, &record, 0);
228
229                if(ret < 0){
230                        logging_error("failed registering sdp record: " << strerror(errno));
231                }else{
232                        logging_debug("sdp record registered using session " << sdp_session_);
233                }
234        }
235
236        // cleanup
237        sdp_data_free(channel);
238        sdp_list_free(l2cap_list, 0);
239        sdp_list_free(rfcomm_list, 0);
240        sdp_list_free(root_list, 0);
241        sdp_list_free(access_proto_list, 0);
242        sdp_list_free(svc_class_list, 0);
243        sdp_list_free(profile_list, 0);
244
245#endif // HAVE_BLUETOOTH_BLUETOOTH_H
246}
247
248void BluetoothSdp::revokeService(string name) {
249#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
250
251        logging_debug("unregistering SDP service");
252        sdp_close(sdp_session_);
253
254#endif // HAVE_BLUETOOTH_BLUETOOTH_H
255}
256
257#ifdef HAVE_BLUETOOTH_BLUETOOTH_H
258
259void BluetoothSdp::bt_scan() {
260
261        //
262        // scan for devices if we have no active rfcomm connections running.
263        // otherwise we would break existing connections due to chipping seq
264        //
265
266        if(!haveConnections()){
267
268                /*
269                 * Scans for other bluetooth devices and starts a SDP search on them.
270                 */
271
272                logging_debug("scanning for peers");
273
274                inquiry_info *ii = NULL;
275                int max_rsp, num_rsp;
276                int dev_id, sock, len, flags;
277                int i;
278
279                bdaddr_t address;
280//              uint8_t channel;
281
282                dev_id = hci_get_route(NULL);
283                sock = hci_open_dev(dev_id);
284                if (dev_id < 0 || sock < 0) {
285                        logging_error("opening socket for device "
286                                        << dev_id << " failed. can not scan for peers: " << strerror(errno));
287                        return;
288                }
289
290                len = 8;
291                max_rsp = 255;
292                flags = IREQ_CACHE_FLUSH;
293                ii = (inquiry_info*) malloc(max_rsp * sizeof(inquiry_info));
294
295                num_rsp = hci_inquiry(dev_id, len, max_rsp, NULL, &ii, flags);
296                if (num_rsp < 0)
297                        logging_error("hci_inquiry failed with " << num_rsp << ": " << strerror(errno));
298
299                for (i = 0; i < num_rsp; i++) {
300                        address = (ii + i)->bdaddr;
301
302                        string saddress = ba2string(&address);
303                        string sname = ba2name(&address, sock);
304
305                        logging_debug("found peer [" << saddress << "] [" << sname << "]");
306                        sdp_search( address, sname );
307                }
308
309                free(ii);
310                close(sock);
311
312        } else {
313                logging_debug("have active connections, no sdp searching");
314        }
315
316        int nextscan = (rand() % 10) + 5;
317        logging_debug("next sdp scan try in " << nextscan << " seconds");
318
319        scan_timer_.expires_from_now( boost::posix_time::seconds(nextscan) );
320        scan_timer_.async_wait( boost::bind(&BluetoothSdp::bt_scan, this) );
321}
322
323void BluetoothSdp::sdp_search(bdaddr_t target, string devicename) {
324
325        /*
326         * Searches target for SDP records with the SpoVnet uuid
327         * and extracts its info attributes.
328         */
329
330        int status;
331        uuid_t svc_uuid;
332        sdp_list_t *response_list, *search_list, *attrid_list;
333        sdp_session_t *session = NULL;
334        uint32_t range = 0x0000ffff;
335        uint8_t port = 0;
336
337        // connect to the SDP server running on the remote machine
338        logging_debug("querying services from bt device ["
339                        << ba2string(&target) << "] [" << devicename << "]");
340
341        // prepare the buffers for the attributes
342        char name[256], info1[256], info2[256], info3[256];
343
344        session = sdp_connect(&bd_addr_any, &target, SDP_RETRY_IF_BUSY);
345
346        if (session == NULL) {
347                logging_error("failed to connect to SDP server at "
348                                << ba2string(&target) << ": " << strerror(errno));
349                return;
350        }
351
352        sdp_uuid128_create(&svc_uuid, &svc_uuid_int);
353        search_list = sdp_list_append(0, &svc_uuid);
354        attrid_list = sdp_list_append(0, &range);
355
356        // get a list of service records that have UUID uuid_
357        response_list = NULL;
358        status = sdp_service_search_attr_req(session, search_list,
359                        SDP_ATTR_REQ_RANGE, attrid_list, &response_list);
360
361        if (status == 0) {
362                sdp_list_t *proto_list = NULL;
363                sdp_list_t *r = response_list;
364
365                // go through each of the service records
366                for ( ; r != NULL; r = r->next) {
367                        sdp_record_t *rec = (sdp_record_t*) r->data;
368
369                        // get a list of the protocol sequences
370                        if (sdp_get_access_protos(rec, &proto_list) == 0) {
371
372                                // get the RFCOMM port number
373                                port = sdp_get_proto_port(proto_list, RFCOMM_UUID);
374
375                                sdp_list_free(proto_list, 0);
376
377                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_NAME, (char*)&name, 256);
378                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO1, (char*)&info1, 256);
379                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO2, (char*)&info2, 256);
380                                sdp_get_string_attr(rec, SDP_ATTR_SPOVNET_INFO3, (char*)&info3, 256);
381
382                                logging_info("Remote peer name is: " << name);
383                                logging_info("Remote peer info1 is: " << info1);
384                                logging_info("Remote peer info2 is: " << info2);
385                                logging_info("Remote peer info3 is: " << info3);
386
387                                // Callback
388                                callback->onBootstrapServiceFound(name, info1, info2, info3);
389                        }
390                        sdp_record_free(rec);
391                }
392        } else {
393                logging_error("sdp_service_search_attr_req failed with timeout: " << strerror(errno));
394        }
395
396        sdp_list_free(response_list, 0);
397        sdp_list_free(search_list, 0);
398        sdp_list_free(attrid_list, 0);
399        sdp_close(session);
400}
401
402string BluetoothSdp::ba2string(bdaddr_t* ba) {
403        /*
404         * Returns a string holding the bt adress in human readable form.
405         */
406        char str[32] = { 0 };
407        ba2str(ba, str);
408        string result = str;
409        return result;
410}
411
412string BluetoothSdp::ba2name(bdaddr_t* ba, int sock){
413
414        char name[256] = {0};
415        memset(name, 0, sizeof(name));
416
417        if( hci_read_remote_name(sock, ba, sizeof(name), name, 0) < 0 )
418                strcpy(name, "unknown");
419
420        string result = name;
421        return result;
422}
423
424bool BluetoothSdp::haveConnections(){
425
426        // TODO: currently we check for overlay connectivity
427
428        if(CONNECTION_CHECKER == NULL) return false;
429        return CONNECTION_CHECKER->haveOverlayConnections();
430
431
432        /* TODO: this will check for rfcomm connections
433        struct hci_conn_list_req* cl = NULL;
434        struct hci_conn_info* ci = NULL;
435
436        int btsock = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
437        if(btsock <  0){
438                logging_error("failed getting bluetooth raw socket");
439                return true; // return true to be safe here and not perform sdp scan
440        }
441
442        cl = (struct hci_conn_list_req*)malloc(10 * sizeof(struct hci_conn_info) + sizeof(struct hci_conn_list_req));
443
444        cl->dev_id = hci_get_route(NULL);;
445        cl->conn_num = 10;
446        ci = cl->conn_info;
447
448        if(ioctl(btsock, HCIGETCONNLIST, (void*)cl)){
449                logging_warn("could not get active rfcomm connections");
450                return true; // return true to be safe here and not perform sdp scan
451        }
452
453        bool haveconn = (cl->conn_num > 0);
454        logging_debug("we have " << cl->conn_num << " active hci connections");
455        free(cl);
456        close(btsock);
457
458        return haveconn;
459        */
460}
461
462#endif // HAVE_BLUETOOTH_BLUETOOTH_H
463
464}} //namespace ariba, utility
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