1 | // [License]
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2 | // The Ariba-Underlay Copyright
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3 | //
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4 | // Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
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5 | //
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6 | // Institute of Telematics
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7 | // UniversitÀt Karlsruhe (TH)
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8 | // Zirkel 2, 76128 Karlsruhe
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9 | // Germany
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10 | //
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11 | // Redistribution and use in source and binary forms, with or without
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12 | // modification, are permitted provided that the following conditions are
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13 | // met:
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14 | //
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15 | // 1. Redistributions of source code must retain the above copyright
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16 | // notice, this list of conditions and the following disclaimer.
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17 | // 2. Redistributions in binary form must reproduce the above copyright
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18 | // notice, this list of conditions and the following disclaimer in the
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19 | // documentation and/or other materials provided with the distribution.
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20 | //
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21 | // THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
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22 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 | // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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24 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR
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25 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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27 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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28 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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29 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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30 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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31 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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32 | //
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33 | // The views and conclusions contained in the software and documentation
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34 | // are those of the authors and should not be interpreted as representing
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35 | // official policies, either expressed or implied, of the Institute of
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36 | // Telematics.
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37 | // [License]
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38 |
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39 | #ifndef __PERIODIC_BROADCAST_H
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40 | #define __PERIODIC_BROADCAST_H
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41 |
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42 | #include "ariba/config.h"
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43 |
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44 | #include <map>
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45 | #include <string>
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46 | #include <ctime>
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47 | #include <iostream>
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48 | #include <boost/asio.hpp>
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49 | #include <boost/foreach.hpp>
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50 | #include <boost/thread/mutex.hpp>
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51 | #include <boost/thread/thread.hpp>
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52 | #include "ariba/utility/bootstrap/modules/BootstrapModule.h"
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53 | #include "ariba/utility/logging/Logging.h"
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54 | #include "ariba/utility/system/Timer.h"
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55 | #include "PeriodicBroadcastMessage.h"
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56 |
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57 | using std::map;
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58 | using std::string;
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59 | using std::cout;
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60 | using boost::asio::ip::udp;
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61 |
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62 | namespace ariba {
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63 | namespace utility {
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64 |
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65 | class PeriodicBroadcast : public BootstrapModule, public Timer {
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66 | use_logging_h(PeriodicBroadcast);
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67 | public:
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68 | PeriodicBroadcast(BootstrapInformationCallback* _callback);
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69 | virtual ~PeriodicBroadcast();
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70 |
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71 | virtual void start();
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72 | virtual void stop();
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73 |
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74 | virtual string getName();
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75 | virtual string getInformation();
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76 | virtual bool isFunctional();
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77 | virtual void publishService(string name, string info1, string info2, string info3);
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78 | virtual void revokeService(string name);
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79 |
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80 | protected:
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81 | virtual void eventFunction();
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82 |
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83 | private:
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84 | void sendLocalServices();
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85 | void updateRemoteServices();
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86 |
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87 | static const long timerinterval; // used to send out updates on our services and check for new services
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88 | static const long servicetimeout; // timeout after that a service is dead when we did not receive updates
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89 | static const unsigned int serverport_v4;
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90 | static const unsigned int serverport_v6;
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91 |
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92 | typedef struct _Service {
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93 | string name;
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94 | string info1;
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95 | string info2;
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96 | string info3;
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97 | time_t lastseen;
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98 |
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99 | _Service()
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100 | : name(""), info1(""), info2(""), info3(""), lastseen(0){
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101 | }
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102 |
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103 | _Service(const string& _name, const string& _info1,
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104 | const string& _info2, const string& _info3, const time_t& _lastseen = 0)
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105 | : name(_name), info1(_info1), info2(_info2), info3(_info3), lastseen(_lastseen){
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106 | }
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107 |
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108 | _Service(const _Service& rh)
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109 | : name(rh.name), info1(rh.info1), info2(rh.info2),
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110 | info3(rh.info3), lastseen(rh.lastseen){
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111 | }
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112 | } Service;
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113 |
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114 | typedef map<string,Service> ServiceList;
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115 | ServiceList localServices;
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116 | boost::mutex localServicesMutex;
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117 |
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118 | ServiceList remoteServices;
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119 | boost::mutex remoteServicesMutex;
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120 |
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121 | ServiceList newRemoteServices;
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122 | boost::mutex newRemoteServicesMutex;
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123 |
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124 | boost::asio::io_service io_service;
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125 | boost::thread* io_service_thread;
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126 | static void threadFunc(PeriodicBroadcast* obj);
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127 |
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128 | class udp_server {
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129 | private:
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130 | udp::socket socket_v4;
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131 | udp::socket socket_v6;
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132 | udp::endpoint remote_endpoint_;
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133 | boost::array<char, 1500> recv_buffer_4;
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134 | boost::array<char, 1500> recv_buffer_6;
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135 | ServiceList* services;
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136 | boost::mutex* servicesmutex;
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137 |
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138 | public:
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139 | udp_server(boost::asio::io_service& io_service, ServiceList* _services, boost::mutex* _servicesmutex)
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140 | : services(_services), servicesmutex(_servicesmutex),
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141 | socket_v4(io_service), socket_v6(io_service) {
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142 |
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143 | boost::asio::ip::udp::endpoint listen_endpoint_v4(
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144 | boost::asio::ip::address_v4::any(),
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145 | PeriodicBroadcast::serverport_v4);
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146 |
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147 | boost::asio::ip::udp::endpoint listen_endpoint_v6(
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148 | boost::asio::ip::address_v6::any(),
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149 | PeriodicBroadcast::serverport_v6);
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150 |
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151 | boost::system::error_code err;
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152 |
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153 | err = socket_v4.open( listen_endpoint_v4.protocol(), err );
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154 | if(err) logging_warn("failed opening ipv4 socket");
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155 |
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156 | err = socket_v6.open( listen_endpoint_v6.protocol(), err );
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157 | if(err) logging_warn("failed opening ipv6 socket");
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158 |
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159 | err = socket_v4.set_option( boost::asio::ip::udp::socket::reuse_address(true), err );
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160 | if(err) logging_warn("failed setting reuse address option on ipv4 socket");
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161 |
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162 | err = socket_v6.set_option( boost::asio::ip::udp::socket::reuse_address(true), err );
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163 | if(err) logging_warn("failed setting reuse address option on ipv6 socket");
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164 |
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165 | err = socket_v4.set_option( boost::asio::socket_base::broadcast(true), err );
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166 | if(err) logging_warn("failed setting broadcast option on ipv4 socket");
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167 |
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168 | err = socket_v6.set_option( boost::asio::socket_base::broadcast(true), err );
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169 | if(err) logging_warn("failed setting broadcast option on ipv6 socket");
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170 |
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171 | err = socket_v4.bind( listen_endpoint_v4, err );
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172 | if(err) logging_warn("failed binding ipv4 socket");
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173 |
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174 | err = socket_v6.bind( listen_endpoint_v6, err );
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175 | if(err) logging_warn("failed binding ipv6 socket");
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176 |
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177 | start_receive();
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178 | }
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179 |
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180 | void sendservice(Service service){
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181 |
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182 | PeriodicBroadcastMessage msg( service.name, service.info1, service.info2, service.info3 );
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183 | Data data = data_serialize( msg, DEFAULT_V );
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184 | uint8_t* pnt = data.getBuffer();
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185 | size_t len = data.getLength() / 8;
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186 |
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187 | boost::system::error_code err;
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188 |
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189 | {
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190 | udp::endpoint endp(udp::v4(), PeriodicBroadcast::serverport_v4);
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191 | endp.address( boost::asio::ip::address_v4::broadcast() );
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192 | socket_v4.send_to( boost::asio::buffer(pnt, len), endp, 0, err );
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193 | if(err) logging_warn("failed sending message through ipv4 socket");
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194 | }
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195 | {
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196 | udp::endpoint endp(udp::v6(), PeriodicBroadcast::serverport_v6);
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197 | endp.address( boost::asio::ip::address_v6::from_string("ff02::1") );
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198 | socket_v6.send_to( boost::asio::buffer(pnt, len), endp, 0, err );
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199 | if(err) logging_warn("failed sending message through ipv6 socket");
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200 | }
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201 | }
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202 |
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203 | private:
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204 | void start_receive(){
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205 | socket_v4.async_receive_from(
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206 | boost::asio::buffer(recv_buffer_4), remote_endpoint_,
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207 | boost::bind(&udp_server::handle_receive_4, this,
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208 | boost::asio::placeholders::error,
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209 | boost::asio::placeholders::bytes_transferred));
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210 |
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211 | socket_v6.async_receive_from(
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212 | boost::asio::buffer(recv_buffer_6), remote_endpoint_,
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213 | boost::bind(&udp_server::handle_receive_6, this,
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214 | boost::asio::placeholders::error,
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215 | boost::asio::placeholders::bytes_transferred));
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216 | }
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217 |
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218 | void handle_receive_4(const boost::system::error_code& error,
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219 | std::size_t bytes_transferred){
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220 |
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221 | if (!error || error == boost::asio::error::message_size)
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222 | handle_info(recv_buffer_4, bytes_transferred);
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223 | else
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224 | logging_warn("failed receiving broadcast data: " << error.message());
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225 |
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226 | start_receive();
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227 | }
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228 |
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229 | void handle_receive_6(const boost::system::error_code& error,
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230 | std::size_t bytes_transferred){
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231 |
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232 | if (!error || error == boost::asio::error::message_size)
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233 | handle_info(recv_buffer_6, bytes_transferred);
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234 | else
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235 | logging_warn("failed receiving broadcast data: " << error.message());
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236 |
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237 | start_receive();
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238 | }
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239 |
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240 | void handle_info(boost::array<char, 1500>& buffer, std::size_t length){
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241 | PeriodicBroadcastMessage msg;
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242 |
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243 | Data data( (uint8_t*)buffer.data(), length*8 );
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244 | data_deserialize( msg, data );
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245 |
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246 | { // insert new found service
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247 | boost::mutex::scoped_lock( *servicesmutex );
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248 |
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249 | ServiceList::iterator it = services->find( msg.getName() );
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250 | if( it != services->end() ){
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251 |
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252 | it->second.info1 = msg.getInfo1();
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253 | it->second.info2 = msg.getInfo2();
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254 | it->second.info3 = msg.getInfo3();
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255 | it->second.lastseen = time(NULL);
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256 |
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257 | } else {
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258 | Service s( msg.getName(), msg.getInfo1(), msg.getInfo2(), msg.getInfo3(), time(NULL));
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259 | services->insert( std::make_pair(msg.getName(), s) );
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260 | }
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261 | }
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262 | }
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263 |
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264 | void handle_send(boost::shared_ptr<std::string> /*message*/,
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265 | const boost::system::error_code& error,
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266 | std::size_t /*bytes_transferred*/){
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267 |
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268 | if(error)
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269 | logging_warn("failed sending out message");
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270 |
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271 | }
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272 |
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273 | };
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274 |
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275 | udp_server server;
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276 |
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277 | };
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278 |
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279 | }} //namespace ariba, utility
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280 |
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281 | #endif // __BLUETOOTH_SDP_H
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