[5284] | 1 | #include "rfcomm.hpp"
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| 2 |
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| 3 | #include "../asio/asio_io_service.h"
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| 4 | #include "../asio/rfcomm.hpp"
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| 5 | #include "../asio/bluetooth_endpoint.hpp"
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| 6 |
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| 7 | #include <boost/asio.hpp>
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| 8 | #include <boost/thread.hpp>
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| 9 | #include <boost/array.hpp>
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| 10 | #include <memory.h>
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| 11 | #include <deque>
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| 12 |
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| 13 | namespace ariba {
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| 14 | namespace transport {
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| 15 |
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[5406] | 16 | use_logging_cpp(rfcomm)
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| 17 |
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[5284] | 18 | using namespace boost::asio;
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| 19 | using namespace detail;
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| 20 | using namespace std;
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| 21 |
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| 22 | using boost::system::error_code;
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| 23 |
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| 24 | class link_data {
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| 25 | public:
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| 26 | uint8_t size_[4];
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| 27 | size_t size;
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| 28 | uint8_t* buffer;
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| 29 | };
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| 30 |
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| 31 | class link_info {
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| 32 | public:
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| 33 | link_info(io_service& io ) :
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[5406] | 34 | up(false), local(), remote(), socket(io), connect_retries(0),
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| 35 | size(0), buffer(NULL), sending(false) {
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[5284] | 36 | }
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| 37 |
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| 38 | // state
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| 39 | bool up;
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| 40 | rfcomm_endpoint local, remote;
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| 41 | bluetooth::rfcomm::socket socket;
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[5406] | 42 | int connect_retries;
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[5284] | 43 |
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| 44 | // read buffer
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| 45 | uint8_t size_[4];
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| 46 | size_t size;
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| 47 | uint8_t* buffer;
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| 48 |
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| 49 | // send buffer
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| 50 | bool sending;
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| 51 | boost::mutex mutex;
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| 52 | std::deque<link_data> send_buffer;
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| 53 | };
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| 54 |
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[5406] | 55 | void rfcomm::shutdown(link_info* info) {
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| 56 | if (info != NULL && info->up) {
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| 57 | info->up = false;
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| 58 | info->socket.shutdown( bluetooth::rfcomm::socket::shutdown_both );
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| 59 | }
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[5289] | 60 | }
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| 61 |
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| 62 |
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[5284] | 63 | inline bluetooth::rfcomm::endpoint convert( const rfcomm_endpoint& endpoint ) {
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| 64 | return bluetooth::rfcomm::endpoint(
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| 65 | endpoint.mac().bluetooth(), endpoint.channel().value()
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| 66 | );
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| 67 | }
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| 68 |
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| 69 | inline rfcomm_endpoint convert( const bluetooth::rfcomm::endpoint& endpoint ) {
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| 70 | mac_address mac;
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| 71 | mac.bluetooth( endpoint.address() );
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| 72 | rfcomm_channel_address channel;
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| 73 | channel.value( endpoint.channel() );
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| 74 | return rfcomm_endpoint( mac, channel );
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| 75 | }
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| 76 |
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| 77 |
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| 78 | rfcomm::rfcomm(uint16_t channel) :
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| 79 | channel(channel), io(asio_io_service::alloc()) {
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[5406] | 80 | accept_retries = 0;
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[5284] | 81 | }
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| 82 |
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| 83 | rfcomm::~rfcomm() {
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| 84 | asio_io_service::free();
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| 85 | }
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| 86 |
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| 87 | void rfcomm::start() {
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| 88 |
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| 89 | // start io service
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| 90 | asio_io_service::start();
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| 91 |
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| 92 | // create acceptor
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[5406] | 93 | logging_info( "Binding to channel " << channel );
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[5284] | 94 | acceptor = new bluetooth::rfcomm::acceptor(io,
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| 95 | bluetooth::rfcomm::endpoint(bluetooth::rfcomm::get(), channel )
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| 96 | );
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| 97 |
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[5406] | 98 | send_data = new link_data();
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| 99 |
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[5284] | 100 | // start accepting
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| 101 | start_accept();
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| 102 | }
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| 103 |
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| 104 | void rfcomm::stop() {
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[5406] | 105 | logging_info( "Stopping asio rfcomm" );
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[5284] | 106 | }
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| 107 |
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| 108 | void rfcomm::send(const address_v* remote, const uint8_t* data, size_t size) {
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[5406] | 109 |
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[5284] | 110 | // get end-point
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| 111 | rfcomm_endpoint endpoint = *remote;
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| 112 | endpoint = convert(convert(endpoint));
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| 113 |
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| 114 | // try to find established connector
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[5406] | 115 | logging_debug("Trying to find a already existing link.");
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[5284] | 116 | link_info* info = NULL;
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| 117 | for (size_t i = 0; i < links.size(); i++)
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| 118 | if (links[i]->remote.mac() == endpoint.mac()) {
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[5406] | 119 | logging_debug("Using already established link");
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[5284] | 120 | info = links[i];
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| 121 | break;
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| 122 | }
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| 123 |
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[5406] | 124 | // not found, or not up? ->try to (re-)connect
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| 125 | if (info==NULL || !info->up) {
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| 126 | logging_debug( "Connecting to " << endpoint.to_string() );
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| 127 | if (info != NULL && !info->up) {
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| 128 | logging_debug("Old link is down. Trying to re-establish link.");
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| 129 | } else {
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| 130 | info = new link_info(io);
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| 131 | }
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| 132 | info->remote = endpoint;
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[5284] | 133 | info->socket.async_connect( convert(endpoint), boost::bind(
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| 134 | &rfcomm::handle_connect, this,
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| 135 | boost::asio::placeholders::error, info
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| 136 | ));
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| 137 | asio_io_service::start();
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| 138 | }
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| 139 |
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| 140 | // copy message
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| 141 | link_data ldata;
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| 142 | ldata.size = size;
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| 143 | ldata.size_[0] = (size >> 24) & 0xFF;
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| 144 | ldata.size_[1] = (size >> 16) & 0xFF;
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| 145 | ldata.size_[2] = (size >> 8) & 0xFF;
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| 146 | ldata.size_[3] = (size >> 0) & 0xFF;
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| 147 | ldata.buffer = new uint8_t[size];
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| 148 | memcpy(ldata.buffer, data, size);
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| 149 |
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| 150 | // enqueue message
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| 151 | info->mutex.lock();
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| 152 | info->send_buffer.push_back(ldata);
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| 153 | info->mutex.unlock();
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| 154 |
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| 155 | // start writing
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| 156 | start_write(info);
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| 157 | }
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| 158 |
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| 159 | void rfcomm::send(const endpoint_set& endpoints, const uint8_t* data, size_t size) {
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| 160 | // send a message to each combination of mac-address and channel
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| 161 | BOOST_FOREACH( const mac_address mac, endpoints.bluetooth ) {
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| 162 | BOOST_FOREACH( const rfcomm_channel_address channel, endpoints.rfcomm ) {
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| 163 | rfcomm_endpoint endpoint(mac, channel);
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| 164 | address_vf vf = endpoint;
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| 165 | send(vf,data,size);
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| 166 | }
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| 167 | }
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| 168 | }
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| 169 |
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| 170 | void rfcomm::terminate(const address_v* local, const address_v* remote) {
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[5406] | 171 | // get end-point
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| 172 | rfcomm_endpoint endpoint = *remote;
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| 173 |
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| 174 | for (size_t i = 0; i < links.size(); i++)
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| 175 | if (links[i]->remote.mac() == endpoint.mac()) {
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| 176 | // close socket
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[5410] | 177 | shutdown(links[i]);
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[5406] | 178 | break;
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| 179 | }
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[5284] | 180 | }
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| 181 |
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| 182 | void rfcomm::register_listener(transport_listener* listener) {
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| 183 | this->listener = listener;
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| 184 | }
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| 185 |
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| 186 | void rfcomm::start_accept() {
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| 187 |
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[5406] | 188 | logging_info( "Waiting for connections ..." );
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[5284] | 189 |
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| 190 | // start accepting a connection
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| 191 | link_info* info = new link_info(io);
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| 192 | acceptor->async_accept(info->socket, boost::bind(
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| 193 | // bind parameters
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| 194 | &rfcomm::handle_accept, this,
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| 195 |
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| 196 | // handler parameters
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| 197 | boost::asio::placeholders::error, info
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| 198 | ));
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| 199 | asio_io_service::start();
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| 200 | }
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| 201 |
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| 202 | void rfcomm::handle_accept(const error_code& error, link_info* info) {
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| 203 | if (error) {
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[5406] | 204 | logging_error( "Error waiting for new connections: " << error
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| 205 | << ", trying to recover (attempt " << accept_retries << ")");
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| 206 |
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| 207 | // restart accepting
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| 208 | if (accept_retries<3) {
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| 209 | accept_retries++;
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| 210 | start_accept();
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[5410] | 211 | } else
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| 212 | delete info;
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| 213 |
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[5284] | 214 | return;
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| 215 | }
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| 216 |
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| 217 | // convert endpoints
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| 218 | info->up = true;
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| 219 | info->local = convert( info->socket.local_endpoint() );
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| 220 | info->remote = convert( info->socket.remote_endpoint() );
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| 221 |
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[5406] | 222 | logging_debug("Accepting incoming connection from "
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| 223 | << info->remote.to_string() );
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[5284] | 224 |
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| 225 | // add to list
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| 226 | links_mutex.lock();
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| 227 | links.push_back(info);
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| 228 | links_mutex.unlock();
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| 229 |
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| 230 | // start i/o
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| 231 | start_read(info);
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| 232 | start_write(info);
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| 233 |
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| 234 | // restart accept
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| 235 | start_accept();
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| 236 | }
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| 237 |
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| 238 | void rfcomm::handle_connect( const error_code& error, link_info* info ) {
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| 239 | if (error) {
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[5406] | 240 | logging_error( "Can not connect. Retrying ... "
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| 241 | "(attempt " << info->connect_retries << ")" );
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| 242 |
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| 243 | // do we retry this connection? yes->
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| 244 | if (info->connect_retries<3) {
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| 245 | // increase counter
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| 246 | info->connect_retries++;
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| 247 |
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| 248 | // retry connection attempt
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| 249 | info->socket.async_connect( convert(info->remote), boost::bind(
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| 250 | &rfcomm::handle_connect, this,
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| 251 | boost::asio::placeholders::error, info
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| 252 | ));
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| 253 |
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| 254 | } else { // no-> delete link and stop
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| 255 | return;
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| 256 | }
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[5284] | 257 | }
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| 258 |
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| 259 | // convert endpoints
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| 260 | info->up = true;
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| 261 | info->local = convert( info->socket.local_endpoint() );
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| 262 | info->remote = convert( info->socket.remote_endpoint() );
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| 263 |
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[5406] | 264 | logging_debug( "Connected to " << info->remote.to_string() );
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[5284] | 265 |
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| 266 | // add to list
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| 267 | links_mutex.lock();
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| 268 | links.push_back(info);
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| 269 | links_mutex.unlock();
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| 270 |
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| 271 | // start i/o
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| 272 | start_read(info);
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| 273 | start_write(info);
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| 274 | }
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| 275 |
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| 276 | void rfcomm::start_read(link_info* info) {
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| 277 | // start read
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| 278 | boost::asio::async_read(info->socket,
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[5406] | 279 |
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[5284] | 280 | // read size of packet
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| 281 | boost::asio::buffer(info->size_, 4),
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[5406] | 282 |
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[5284] | 283 | // bind handler
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| 284 | boost::bind(
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[5406] | 285 |
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[5284] | 286 | // bind parameters
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| 287 | &rfcomm::handle_read_header, this,
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[5406] | 288 |
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[5284] | 289 | // handler parameters
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| 290 | placeholders::error, placeholders::bytes_transferred, info
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| 291 | )
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| 292 | );
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| 293 | }
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| 294 |
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| 295 | void rfcomm::handle_read_header(const error_code& error, size_t bytes,
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| 296 | link_info* info) {
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| 297 |
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[5406] | 298 | // handle error
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| 299 | if (error) {
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| 300 | logging_error("Failed to receive message payload.");
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| 301 | shutdown(info);
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| 302 | return;
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| 303 | }
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| 304 |
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[5284] | 305 | // ignore errors and wait for all data to be received
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[5406] | 306 | if (bytes != 4) return;
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[5284] | 307 |
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| 308 | // get size
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| 309 | info->size = (info->size_[0]<<24) + (info->size_[1] << 16) +
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| 310 | (info->size_[2]<< 8) + (info->size_[3] << 0);
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| 311 |
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[5406] | 312 | logging_debug( "Message header received -> receive message of size " << info->size );
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[5284] | 313 |
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| 314 | // allocate buffer
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| 315 | info->buffer = new uint8_t[info->size];
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| 316 |
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| 317 | // start read
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| 318 | boost::asio::async_read(info->socket,
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| 319 | // read size of packet
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| 320 | boost::asio::buffer(info->buffer, info->size),
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| 321 | // bind handler
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| 322 | boost::bind(
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| 323 | // bind parameters
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| 324 | &rfcomm::handle_read_data, this,
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| 325 | // handler parameters
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| 326 | placeholders::error, placeholders::bytes_transferred, info
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| 327 | )
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| 328 | );
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| 329 | }
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| 330 |
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| 331 | void rfcomm::handle_read_data(const error_code& error, size_t bytes,
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| 332 | link_info* info) {
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| 333 |
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[5406] | 334 | // check error
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| 335 | if (error) {
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| 336 | logging_error("Failed to receive message payload.");
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| 337 | shutdown(info);
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[5289] | 338 | return;
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| 339 | }
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[5284] | 340 |
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[5406] | 341 | // wait for all data to be received
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[5410] | 342 | if (bytes != info->size)
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| 343 | return;
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[5284] | 344 |
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[5406] | 345 | logging_debug( "Received message of size " << info->size );
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| 346 |
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[5284] | 347 | // deliver data
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| 348 | listener->receive_message(this, info->local, info->remote, info->buffer, info->size );
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| 349 |
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| 350 | // free buffers and reset size buffer
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| 351 | delete [] info->buffer;
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| 352 | for (size_t i=0; i<4; i++) info->size_[i] = 0;
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[5286] | 353 |
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| 354 | start_read(info);
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[5284] | 355 | }
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| 356 |
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| 357 | void rfcomm::start_write( link_info* info ) {
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[5406] | 358 | boost::mutex::scoped_lock(info->mutex);
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| 359 |
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[5284] | 360 | // do not start writing if sending is in progress
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| 361 | if (info->sending || !info->up || info->send_buffer.size()==0) return;
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| 362 |
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[5410] | 363 | logging_debug("Sending messages ...");
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[5284] | 364 |
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| 365 | // safely remove data from deque
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[5406] | 366 | *send_data = info->send_buffer.front();
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[5284] | 367 | info->send_buffer.pop_front();
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| 368 |
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| 369 | boost::array<boost::asio::mutable_buffer, 2> buffer;
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[5406] | 370 | buffer[0] = boost::asio::buffer(send_data->size_,4);
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| 371 | buffer[1] = boost::asio::buffer(send_data->buffer,send_data->size);
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[5284] | 372 |
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| 373 | // start writing
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| 374 | boost::asio::async_write(info->socket,
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| 375 | // read size of packet
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| 376 | buffer,
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| 377 | // bind handler
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| 378 | boost::bind(
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| 379 | // bind parameters
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| 380 | &rfcomm::handle_write_data, this,
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| 381 | // handler parameters
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| 382 | placeholders::error, placeholders::bytes_transferred,
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[5406] | 383 | info, send_data->size, send_data->buffer
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[5284] | 384 | )
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| 385 | );
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| 386 | }
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| 387 |
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| 388 | void rfcomm::handle_write_data(const error_code& error, size_t bytes,
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| 389 | link_info* info, size_t size, uint8_t* buffer ) {
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| 390 |
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[5410] | 391 | // handle error
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| 392 | if (error) {
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| 393 | logging_error( "Message sent error" );
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| 394 | shutdown(info);
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| 395 | return;
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| 396 | }
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[5406] | 397 |
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[5410] | 398 | // wait for all data to be sent
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| 399 | if (bytes != (size+4) )
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[5284] | 400 | return;
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[5410] | 401 |
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[5406] | 402 | logging_debug( "Message sent" );
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[5284] | 403 |
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| 404 | // free buffer
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| 405 | delete [] buffer;
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| 406 |
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| 407 | // restart-write
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| 408 | start_write(info);
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| 409 | }
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| 410 |
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| 411 | }} // namespace ariba::transport
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