source: source/ariba/utility/transport/rfcomm/rfcomm.cpp@ 7468

Last change on this file since 7468 was 7464, checked in by Christoph Mayer, 15 years ago

-config include gefixt

File size: 9.9 KB
Line 
1#include "ariba/config.h"
2
3#ifdef HAVE_LIBBLUETOOTH
4
5#include "rfcomm.hpp"
6
7#include "ariba/utility/transport/asio/asio_io_service.h"
8#include "ariba/utility/transport/asio/rfcomm.hpp"
9#include "ariba/utility/transport/asio/bluetooth_endpoint.hpp"
10
11#include <boost/asio.hpp>
12#include <boost/thread.hpp>
13#include <boost/array.hpp>
14#include <memory.h>
15#include <deque>
16#include <cerrno>
17
18namespace ariba {
19namespace transport {
20
21use_logging_cpp(rfcomm)
22
23using namespace boost::asio;
24using namespace detail;
25using namespace std;
26
27using boost::system::error_code;
28
29class link_data {
30public:
31 uint8_t size_[4];
32 size_t size;
33 uint8_t* buffer;
34};
35
36class link_info {
37public:
38 link_info(io_service& io ) :
39 io(io), up(false), connecting(false), local(), remote(), socket(new bluetooth::rfcomm::socket(io)), connect_retries(0),
40 size(0), buffer(NULL), sending(false) {
41 }
42
43 ~link_info() {
44 delete socket;
45 }
46
47 void reinit() {
48 delete socket;
49 socket = new bluetooth::rfcomm::socket(io);
50 up = false;
51 }
52
53 io_service& io;
54
55 // state
56 bool up;
57 bool connecting;
58 rfcomm_endpoint local, remote;
59 bluetooth::rfcomm::socket* socket;
60 int connect_retries;
61
62 // read buffer
63 uint8_t size_[4];
64 size_t size;
65 uint8_t* buffer;
66
67 // send buffer
68 bool sending;
69 boost::mutex mutex;
70 std::deque<link_data> send_buffer;
71};
72
73void rfcomm::shutdown(link_info* info) {
74 if (info != NULL && info->up) {
75 info->up = false;
76 info->socket->shutdown( bluetooth::rfcomm::socket::shutdown_both );
77 }
78}
79
80
81inline bluetooth::rfcomm::endpoint convert( const rfcomm_endpoint& endpoint ) {
82 return bluetooth::rfcomm::endpoint(
83 endpoint.mac().bluetooth(), endpoint.channel().value()
84 );
85}
86
87inline rfcomm_endpoint convert( const bluetooth::rfcomm::endpoint& endpoint ) {
88 mac_address mac;
89 mac.bluetooth( endpoint.address() );
90 rfcomm_channel_address channel;
91 channel.value( endpoint.channel() );
92 return rfcomm_endpoint( mac, channel );
93}
94
95
96rfcomm::rfcomm(uint16_t channel) :
97 channel(channel), io(asio_io_service::alloc()) {
98 accept_retries = 0;
99}
100
101rfcomm::~rfcomm() {
102 asio_io_service::free();
103}
104
105void rfcomm::start() {
106
107 // start io service
108 asio_io_service::start();
109
110 // create acceptor
111 logging_info( "Binding to channel " << channel );
112 acceptor = new bluetooth::rfcomm::acceptor(io,
113 bluetooth::rfcomm::endpoint(bluetooth::rfcomm::get(), channel )
114 );
115
116 send_data = new link_data();
117
118 // start accepting
119 start_accept();
120}
121
122void rfcomm::stop() {
123 logging_info( "Stopping asio rfcomm" );
124}
125
126void rfcomm::send(const address_v* remote, const uint8_t* data, size_t size) {
127
128 // get end-point
129 rfcomm_endpoint endpoint = *remote;
130 endpoint = convert(convert(endpoint));
131
132 // try to find established connector
133 logging_debug("Trying to find a already existing link.");
134 link_info* info = NULL;
135 for (size_t i = 0; i < links.size(); i++)
136 if (links[i]->remote.mac() == endpoint.mac()) {
137 logging_debug("Using already established link");
138 info = links[i];
139 break;
140 }
141
142 // not found, or not up? ->try to (re-)connect
143 if (info==NULL || ((!info->up || !info->socket->is_open()) && !info->connecting) ) {
144 logging_debug( "Connecting to " << endpoint.to_string() );
145 if (info != NULL && (!info->up || !info->socket->is_open())) {
146 logging_error("Old link is down. Trying to re-establish link.");
147 info->reinit();
148 } else {
149 info = new link_info(io);
150 }
151 info->connect_retries = 0;
152 info->remote = endpoint;
153 info->connecting = true;
154 info->socket->async_connect( convert(endpoint), boost::bind(
155 &rfcomm::handle_connect, this,
156 boost::asio::placeholders::error, info
157 ));
158 links.push_back(info);
159 }
160
161 // copy message
162 link_data ldata;
163 ldata.size = size;
164 ldata.size_[0] = (size >> 24) & 0xFF;
165 ldata.size_[1] = (size >> 16) & 0xFF;
166 ldata.size_[2] = (size >> 8) & 0xFF;
167 ldata.size_[3] = (size >> 0) & 0xFF;
168 ldata.buffer = new uint8_t[size];
169 memcpy(ldata.buffer, data, size);
170
171 // enqueue message
172 info->mutex.lock();
173 info->send_buffer.push_back(ldata);
174 info->mutex.unlock();
175
176 // start writing
177 io.post( boost::bind( &rfcomm::start_write, this, info) );
178}
179
180void rfcomm::send(const endpoint_set& endpoints, const uint8_t* data, size_t size) {
181 // send a message to each combination of mac-address and channel
182 BOOST_FOREACH( const mac_address mac, endpoints.bluetooth ) {
183 BOOST_FOREACH( const rfcomm_channel_address channel, endpoints.rfcomm ) {
184 rfcomm_endpoint endpoint(mac, channel);
185 address_vf vf = endpoint;
186 send(vf,data,size);
187 }
188 }
189}
190
191void rfcomm::terminate( const address_v* remote) {
192 // get end-point
193 rfcomm_endpoint endpoint = *remote;
194
195 for (size_t i = 0; i < links.size(); i++)
196 if (links[i]->remote.mac() == endpoint.mac()) {
197 // close socket
198 shutdown(links[i]);
199 break;
200 }
201}
202
203void rfcomm::register_listener(transport_listener* listener) {
204 this->listener = listener;
205}
206
207void rfcomm::start_accept() {
208
209 logging_info( "Waiting for connections ..." );
210
211 // start accepting a connection
212 link_info* info = new link_info(io);
213 acceptor->async_accept(*info->socket, boost::bind(
214 // bind parameters
215 &rfcomm::handle_accept, this,
216
217 // handler parameters
218 boost::asio::placeholders::error, info
219 ));
220 asio_io_service::start();
221}
222
223void rfcomm::handle_accept(const error_code& error, link_info* info) {
224 if (error) {
225 logging_error( "Error waiting for new connections. Error code: "<< error.message()
226 << ", trying to recover (attempt " << accept_retries << ")");
227
228 // restart accepting
229 if (accept_retries<3) {
230 accept_retries++;
231 start_accept();
232 } else
233 delete info;
234
235 return;
236 }
237
238 links_mutex.lock();
239
240 // convert endpoints
241 info->up = true;
242 info->local = convert( info->socket->local_endpoint() );
243 info->remote = convert( info->socket->remote_endpoint() );
244
245 logging_debug("Accepted incoming connection from "
246 << info->remote.to_string() );
247
248 // add to list
249 links.push_back(info);
250 links_mutex.unlock();
251
252 // start i/o
253 start_read(info);
254 start_write(info);
255
256 // restart accept
257 start_accept();
258}
259
260void rfcomm::handle_connect( const error_code& error, link_info* info ) {
261 if (error) {
262 logging_error( "Can not connect. Error code: "
263 << error.message() << " Retrying ... "
264 "(attempt " << info->connect_retries << ")" );
265
266 // do we retry this connection? yes->
267 if (info->connect_retries<3) {
268 // increase counter
269 info->connecting = false;
270 info->connect_retries++;
271 info->reinit();
272
273 // retry connection attempt
274 info->socket->async_connect( convert(info->remote), boost::bind(
275 &rfcomm::handle_connect, this,
276 boost::asio::placeholders::error, info
277 ));
278
279 } else { // no-> delete link and stop
280 return;
281 }
282 }
283
284 // convert endpoints
285 info->up = true;
286 info->connecting = false;
287 info->local = convert( info->socket->local_endpoint() );
288 info->remote = convert( info->socket->remote_endpoint() );
289
290 logging_debug( "Connected to " << info->remote.to_string() );
291
292 // add to list
293 links_mutex.lock();
294 links.push_back(info);
295 links_mutex.unlock();
296
297 // start i/o
298 start_read(info);
299 start_write(info);
300}
301
302void rfcomm::start_read(link_info* info) {
303 logging_debug("Start reading ...");
304
305 // start read
306 boost::asio::async_read(*info->socket,
307
308 // read size of packet
309 boost::asio::buffer(info->size_, 4),
310
311 // bind handler
312 boost::bind(
313
314 // bind parameters
315 &rfcomm::handle_read_header, this,
316
317 // handler parameters
318 placeholders::error, placeholders::bytes_transferred, info
319 )
320 );
321}
322
323void rfcomm::handle_read_header(const error_code& error, size_t bytes,
324 link_info* info) {
325
326 // handle error
327 if (error) {
328 logging_error("Failed to receive message payload. Error code: "
329 << error.message() );
330 shutdown(info);
331 return;
332 }
333
334 // ignore errors and wait for all data to be received
335 if (bytes != 4) return;
336
337 // get size
338 info->size = (info->size_[0]<<24) + (info->size_[1] << 16) +
339 (info->size_[2]<< 8) + (info->size_[3] << 0);
340
341 // allocate buffer
342 info->buffer = new uint8_t[info->size];
343
344 // start read
345 boost::asio::async_read(*info->socket,
346 // read size of packet
347 boost::asio::buffer(info->buffer, info->size),
348 // bind handler
349 boost::bind(
350 // bind parameters
351 &rfcomm::handle_read_data, this,
352 // handler parameters
353 placeholders::error, placeholders::bytes_transferred, info
354 )
355 );
356}
357
358void rfcomm::handle_read_data(const error_code& error, size_t bytes,
359 link_info* info) {
360
361 // check error
362 if (error) {
363 logging_error("Failed to receive message payload. Error: " << error.message() );
364 shutdown(info);
365 return;
366 }
367
368 // wait for all data to be received
369 if (bytes != info->size)
370 return;
371
372 // deliver data
373 listener->receive_message(this, info->local, info->remote, info->buffer, info->size );
374
375 // free buffers and reset size buffer
376 delete [] info->buffer;
377 for (size_t i=0; i<4; i++) info->size_[i] = 0;
378
379 start_read(info);
380}
381
382void rfcomm::start_write( link_info* info ) {
383 // do not start writing if sending is in progress
384 if (info->sending || !info->up || info->send_buffer.size()==0) return;
385
386 // set sending flag
387 info->sending = true;
388
389 // safely remove data from deque
390 *send_data = info->send_buffer.front();
391 info->send_buffer.pop_front();
392
393 boost::array<boost::asio::mutable_buffer, 2> buffer;
394 buffer[0] = boost::asio::buffer(send_data->size_,4);
395 buffer[1] = boost::asio::buffer(send_data->buffer,send_data->size);
396
397 // start writing
398 boost::asio::async_write(*info->socket,
399 // read size of packet
400 buffer,
401 // bind handler
402 boost::bind(
403 // bind parameters
404 &rfcomm::handle_write_data, this,
405 // handler parameters
406 placeholders::error, placeholders::bytes_transferred,
407 info, send_data->size, send_data->buffer
408 )
409 );
410}
411
412void rfcomm::handle_write_data(const error_code& error, size_t bytes,
413 link_info* info, size_t size, uint8_t* buffer ) {
414
415 // handle error
416 if (error) {
417 logging_error( "Message sent error. Error: " << error.message() );
418 info->sending = false;
419 shutdown(info);
420 return;
421 }
422
423 // wait for all data to be sent
424 if (bytes != (size+4) )
425 return;
426
427 logging_debug( "Message sent" );
428
429 // free buffer
430 delete [] buffer;
431 info->sending = false;
432
433 // restart-write
434 start_write(info);
435}
436
437}} // namespace ariba::transport
438
439#endif
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