[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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[5418] | 12 | #include <cerrno>
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[5284] | 13 |
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| 14 | namespace ariba {
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| 15 | namespace transport {
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| 16 |
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[5406] | 17 | use_logging_cpp(rfcomm)
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| 18 |
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[5284] | 19 | using namespace boost::asio;
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| 20 | using namespace detail;
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| 21 | using namespace std;
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| 22 |
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| 23 | using boost::system::error_code;
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| 24 |
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| 25 | class link_data {
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| 26 | public:
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| 27 | uint8_t size_[4];
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| 28 | size_t size;
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| 29 | uint8_t* buffer;
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| 30 | };
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| 31 |
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| 32 | class link_info {
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| 33 | public:
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| 34 | link_info(io_service& io ) :
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[5406] | 35 | up(false), local(), remote(), socket(io), connect_retries(0),
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| 36 | size(0), buffer(NULL), sending(false) {
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[5284] | 37 | }
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| 38 |
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| 39 | // state
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| 40 | bool up;
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| 41 | rfcomm_endpoint local, remote;
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| 42 | bluetooth::rfcomm::socket socket;
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[5406] | 43 | int connect_retries;
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[5284] | 44 |
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| 45 | // read buffer
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| 46 | uint8_t size_[4];
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| 47 | size_t size;
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| 48 | uint8_t* buffer;
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| 49 |
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| 50 | // send buffer
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| 51 | bool sending;
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| 52 | boost::mutex mutex;
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| 53 | std::deque<link_data> send_buffer;
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| 54 | };
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| 55 |
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[5406] | 56 | void rfcomm::shutdown(link_info* info) {
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| 57 | if (info != NULL && info->up) {
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| 58 | info->up = false;
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| 59 | info->socket.shutdown( bluetooth::rfcomm::socket::shutdown_both );
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| 60 | }
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[5289] | 61 | }
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| 62 |
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| 63 |
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[5284] | 64 | inline bluetooth::rfcomm::endpoint convert( const rfcomm_endpoint& endpoint ) {
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| 65 | return bluetooth::rfcomm::endpoint(
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| 66 | endpoint.mac().bluetooth(), endpoint.channel().value()
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| 67 | );
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| 68 | }
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| 69 |
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| 70 | inline rfcomm_endpoint convert( const bluetooth::rfcomm::endpoint& endpoint ) {
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| 71 | mac_address mac;
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| 72 | mac.bluetooth( endpoint.address() );
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| 73 | rfcomm_channel_address channel;
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| 74 | channel.value( endpoint.channel() );
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| 75 | return rfcomm_endpoint( mac, channel );
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| 76 | }
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| 77 |
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| 78 |
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| 79 | rfcomm::rfcomm(uint16_t channel) :
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| 80 | channel(channel), io(asio_io_service::alloc()) {
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[5406] | 81 | accept_retries = 0;
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[5284] | 82 | }
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| 83 |
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| 84 | rfcomm::~rfcomm() {
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| 85 | asio_io_service::free();
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| 86 | }
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| 87 |
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| 88 | void rfcomm::start() {
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| 89 |
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| 90 | // start io service
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| 91 | asio_io_service::start();
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| 92 |
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| 93 | // create acceptor
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[5406] | 94 | logging_info( "Binding to channel " << channel );
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[5284] | 95 | acceptor = new bluetooth::rfcomm::acceptor(io,
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| 96 | bluetooth::rfcomm::endpoint(bluetooth::rfcomm::get(), channel )
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| 97 | );
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| 98 |
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[5406] | 99 | send_data = new link_data();
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| 100 |
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[5284] | 101 | // start accepting
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| 102 | start_accept();
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| 103 | }
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| 104 |
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| 105 | void rfcomm::stop() {
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[5406] | 106 | logging_info( "Stopping asio rfcomm" );
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[5284] | 107 | }
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| 108 |
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| 109 | void rfcomm::send(const address_v* remote, const uint8_t* data, size_t size) {
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[5406] | 110 |
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[5284] | 111 | // get end-point
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| 112 | rfcomm_endpoint endpoint = *remote;
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| 113 | endpoint = convert(convert(endpoint));
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| 114 |
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| 115 | // try to find established connector
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[5406] | 116 | logging_debug("Trying to find a already existing link.");
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[5284] | 117 | link_info* info = NULL;
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| 118 | for (size_t i = 0; i < links.size(); i++)
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| 119 | if (links[i]->remote.mac() == endpoint.mac()) {
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[5406] | 120 | logging_debug("Using already established link");
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[5284] | 121 | info = links[i];
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| 122 | break;
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| 123 | }
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| 124 |
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[5406] | 125 | // not found, or not up? ->try to (re-)connect
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[5423] | 126 | if (info==NULL || !info->up || info->socket.is_open() ) {
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[5406] | 127 | logging_debug( "Connecting to " << endpoint.to_string() );
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[5423] | 128 | if (info != NULL && (!info->up || !info->socket.is_open())) {
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[5406] | 129 | logging_debug("Old link is down. Trying to re-establish link.");
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| 130 | } else {
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| 131 | info = new link_info(io);
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| 132 | }
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[5423] | 133 | info->connect_retries = 0;
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[5406] | 134 | info->remote = endpoint;
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[5284] | 135 | info->socket.async_connect( convert(endpoint), boost::bind(
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| 136 | &rfcomm::handle_connect, this,
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| 137 | boost::asio::placeholders::error, info
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| 138 | ));
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| 139 | asio_io_service::start();
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| 140 | }
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| 141 |
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| 142 | // copy message
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| 143 | link_data ldata;
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| 144 | ldata.size = size;
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| 145 | ldata.size_[0] = (size >> 24) & 0xFF;
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| 146 | ldata.size_[1] = (size >> 16) & 0xFF;
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| 147 | ldata.size_[2] = (size >> 8) & 0xFF;
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| 148 | ldata.size_[3] = (size >> 0) & 0xFF;
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| 149 | ldata.buffer = new uint8_t[size];
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| 150 | memcpy(ldata.buffer, data, size);
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| 151 |
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| 152 | // enqueue message
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| 153 | info->mutex.lock();
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| 154 | info->send_buffer.push_back(ldata);
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| 155 | info->mutex.unlock();
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| 156 |
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| 157 | // start writing
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| 158 | start_write(info);
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| 159 | }
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| 160 |
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| 161 | void rfcomm::send(const endpoint_set& endpoints, const uint8_t* data, size_t size) {
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| 162 | // send a message to each combination of mac-address and channel
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| 163 | BOOST_FOREACH( const mac_address mac, endpoints.bluetooth ) {
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| 164 | BOOST_FOREACH( const rfcomm_channel_address channel, endpoints.rfcomm ) {
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| 165 | rfcomm_endpoint endpoint(mac, channel);
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| 166 | address_vf vf = endpoint;
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| 167 | send(vf,data,size);
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| 168 | }
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| 169 | }
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| 170 | }
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| 171 |
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| 172 | void rfcomm::terminate(const address_v* local, const address_v* remote) {
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[5406] | 173 | // get end-point
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| 174 | rfcomm_endpoint endpoint = *remote;
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| 175 |
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| 176 | for (size_t i = 0; i < links.size(); i++)
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| 177 | if (links[i]->remote.mac() == endpoint.mac()) {
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| 178 | // close socket
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[5410] | 179 | shutdown(links[i]);
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[5406] | 180 | break;
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| 181 | }
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[5284] | 182 | }
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| 183 |
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| 184 | void rfcomm::register_listener(transport_listener* listener) {
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| 185 | this->listener = listener;
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| 186 | }
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| 187 |
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| 188 | void rfcomm::start_accept() {
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| 189 |
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[5406] | 190 | logging_info( "Waiting for connections ..." );
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[5284] | 191 |
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| 192 | // start accepting a connection
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| 193 | link_info* info = new link_info(io);
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| 194 | acceptor->async_accept(info->socket, boost::bind(
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| 195 | // bind parameters
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| 196 | &rfcomm::handle_accept, this,
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| 197 |
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| 198 | // handler parameters
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| 199 | boost::asio::placeholders::error, info
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| 200 | ));
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| 201 | asio_io_service::start();
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| 202 | }
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| 203 |
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| 204 | void rfcomm::handle_accept(const error_code& error, link_info* info) {
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| 205 | if (error) {
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[5422] | 206 | logging_error( "Error waiting for new connections. Error code: "<< error.message()
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[5406] | 207 | << ", trying to recover (attempt " << accept_retries << ")");
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| 208 |
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| 209 | // restart accepting
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| 210 | if (accept_retries<3) {
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| 211 | accept_retries++;
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| 212 | start_accept();
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[5410] | 213 | } else
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| 214 | delete info;
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| 215 |
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[5284] | 216 | return;
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| 217 | }
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| 218 |
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[5423] | 219 | links_mutex.lock();
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| 220 |
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[5284] | 221 | // convert endpoints
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| 222 | info->up = true;
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| 223 | info->local = convert( info->socket.local_endpoint() );
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| 224 | info->remote = convert( info->socket.remote_endpoint() );
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| 225 |
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[5423] | 226 | logging_debug("Accepted incoming connection from "
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[5406] | 227 | << info->remote.to_string() );
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[5284] | 228 |
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| 229 | // add to list
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| 230 | links.push_back(info);
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| 231 | links_mutex.unlock();
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| 232 |
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| 233 | // start i/o
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| 234 | start_read(info);
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| 235 | start_write(info);
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| 236 |
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| 237 | // restart accept
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| 238 | start_accept();
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| 239 | }
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| 240 |
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| 241 | void rfcomm::handle_connect( const error_code& error, link_info* info ) {
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| 242 | if (error) {
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[5422] | 243 | logging_error( "Can not connect. Error code: "
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| 244 | << error.message() << " Retrying ... "
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[5406] | 245 | "(attempt " << info->connect_retries << ")" );
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| 246 |
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| 247 | // do we retry this connection? yes->
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| 248 | if (info->connect_retries<3) {
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| 249 | // increase counter
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| 250 | info->connect_retries++;
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| 251 |
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| 252 | // retry connection attempt
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| 253 | info->socket.async_connect( convert(info->remote), boost::bind(
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| 254 | &rfcomm::handle_connect, this,
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| 255 | boost::asio::placeholders::error, info
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| 256 | ));
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| 257 |
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| 258 | } else { // no-> delete link and stop
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| 259 | return;
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| 260 | }
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[5284] | 261 | }
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| 262 |
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| 263 | // convert endpoints
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| 264 | info->up = true;
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| 265 | info->local = convert( info->socket.local_endpoint() );
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| 266 | info->remote = convert( info->socket.remote_endpoint() );
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| 267 |
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[5406] | 268 | logging_debug( "Connected to " << info->remote.to_string() );
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[5284] | 269 |
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| 270 | // add to list
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| 271 | links_mutex.lock();
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| 272 | links.push_back(info);
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| 273 | links_mutex.unlock();
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| 274 |
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| 275 | // start i/o
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| 276 | start_read(info);
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| 277 | start_write(info);
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| 278 | }
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| 279 |
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| 280 | void rfcomm::start_read(link_info* info) {
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| 281 | // start read
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| 282 | boost::asio::async_read(info->socket,
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[5406] | 283 |
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[5284] | 284 | // read size of packet
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| 285 | boost::asio::buffer(info->size_, 4),
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[5406] | 286 |
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[5284] | 287 | // bind handler
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| 288 | boost::bind(
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[5406] | 289 |
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[5284] | 290 | // bind parameters
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| 291 | &rfcomm::handle_read_header, this,
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[5406] | 292 |
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[5284] | 293 | // handler parameters
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| 294 | placeholders::error, placeholders::bytes_transferred, info
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| 295 | )
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| 296 | );
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| 297 | }
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| 298 |
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| 299 | void rfcomm::handle_read_header(const error_code& error, size_t bytes,
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| 300 | link_info* info) {
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| 301 |
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[5406] | 302 | // handle error
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| 303 | if (error) {
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[5422] | 304 | logging_error("Failed to receive message payload. Error code: "
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| 305 | << error.message() );
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[5406] | 306 | shutdown(info);
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| 307 | return;
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| 308 | }
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| 309 |
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[5284] | 310 | // ignore errors and wait for all data to be received
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[5406] | 311 | if (bytes != 4) return;
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[5284] | 312 |
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| 313 | // get size
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| 314 | info->size = (info->size_[0]<<24) + (info->size_[1] << 16) +
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| 315 | (info->size_[2]<< 8) + (info->size_[3] << 0);
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| 316 |
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[5406] | 317 | logging_debug( "Message header received -> receive message of size " << info->size );
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[5284] | 318 |
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| 319 | // allocate buffer
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| 320 | info->buffer = new uint8_t[info->size];
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| 321 |
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| 322 | // start read
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| 323 | boost::asio::async_read(info->socket,
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| 324 | // read size of packet
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| 325 | boost::asio::buffer(info->buffer, info->size),
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| 326 | // bind handler
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| 327 | boost::bind(
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| 328 | // bind parameters
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| 329 | &rfcomm::handle_read_data, this,
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| 330 | // handler parameters
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| 331 | placeholders::error, placeholders::bytes_transferred, info
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| 332 | )
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| 333 | );
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| 334 | }
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| 335 |
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| 336 | void rfcomm::handle_read_data(const error_code& error, size_t bytes,
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| 337 | link_info* info) {
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| 338 |
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[5406] | 339 | // check error
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| 340 | if (error) {
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[5422] | 341 | logging_error("Failed to receive message payload. Error code: "
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| 342 | << error.message() );
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[5406] | 343 | shutdown(info);
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[5289] | 344 | return;
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| 345 | }
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[5284] | 346 |
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[5406] | 347 | // wait for all data to be received
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[5410] | 348 | if (bytes != info->size)
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| 349 | return;
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[5284] | 350 |
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[5406] | 351 | logging_debug( "Received message of size " << info->size );
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| 352 |
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[5284] | 353 | // deliver data
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| 354 | listener->receive_message(this, info->local, info->remote, info->buffer, info->size );
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| 355 |
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| 356 | // free buffers and reset size buffer
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| 357 | delete [] info->buffer;
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| 358 | for (size_t i=0; i<4; i++) info->size_[i] = 0;
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[5286] | 359 |
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| 360 | start_read(info);
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[5284] | 361 | }
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| 362 |
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| 363 | void rfcomm::start_write( link_info* info ) {
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[5406] | 364 | boost::mutex::scoped_lock(info->mutex);
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| 365 |
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[5284] | 366 | // do not start writing if sending is in progress
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| 367 | if (info->sending || !info->up || info->send_buffer.size()==0) return;
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| 368 |
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[5410] | 369 | logging_debug("Sending messages ...");
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[5284] | 370 |
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| 371 | // safely remove data from deque
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[5406] | 372 | *send_data = info->send_buffer.front();
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[5284] | 373 | info->send_buffer.pop_front();
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| 374 |
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| 375 | boost::array<boost::asio::mutable_buffer, 2> buffer;
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[5406] | 376 | buffer[0] = boost::asio::buffer(send_data->size_,4);
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| 377 | buffer[1] = boost::asio::buffer(send_data->buffer,send_data->size);
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[5284] | 378 |
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| 379 | // start writing
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| 380 | boost::asio::async_write(info->socket,
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| 381 | // read size of packet
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| 382 | buffer,
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| 383 | // bind handler
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| 384 | boost::bind(
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| 385 | // bind parameters
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| 386 | &rfcomm::handle_write_data, this,
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| 387 | // handler parameters
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| 388 | placeholders::error, placeholders::bytes_transferred,
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[5406] | 389 | info, send_data->size, send_data->buffer
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[5284] | 390 | )
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| 391 | );
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| 392 | }
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| 393 |
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| 394 | void rfcomm::handle_write_data(const error_code& error, size_t bytes,
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| 395 | link_info* info, size_t size, uint8_t* buffer ) {
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| 396 |
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[5410] | 397 | // handle error
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| 398 | if (error) {
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[5422] | 399 | logging_error( "Message sent error. Error code: "<< error.message() );
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[5410] | 400 | shutdown(info);
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| 401 | return;
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| 402 | }
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[5406] | 403 |
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[5410] | 404 | // wait for all data to be sent
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| 405 | if (bytes != (size+4) )
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[5284] | 406 | return;
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[5410] | 407 |
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[5406] | 408 | logging_debug( "Message sent" );
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[5284] | 409 |
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| 410 | // free buffer
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| 411 | delete [] buffer;
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| 412 |
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| 413 | // restart-write
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| 414 | start_write(info);
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| 415 | }
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| 416 |
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| 417 | }} // namespace ariba::transport
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