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 | #include "NetworkInformation.h" |
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40 | |
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41 | namespace ariba { |
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42 | namespace communication { |
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43 | |
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44 | use_logging_cpp(NetworkInformation); |
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45 | |
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46 | NetworkInformation::NetworkInformation() : infoSocket( -1 ){ |
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47 | |
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48 | infoSocket = socket( AF_INET, SOCK_DGRAM, 0 ); |
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49 | } |
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50 | |
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51 | NetworkInformation::~NetworkInformation(){ |
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52 | |
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53 | close( infoSocket ); |
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54 | } |
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55 | |
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56 | NetworkInterfaceList NetworkInformation::getInterfaces(){ |
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57 | |
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58 | NetworkInterfaceList retlist; |
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59 | |
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60 | // |
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61 | // get all network interfaces with basic information |
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62 | // and all addresses configured on the interface |
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63 | // |
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64 | |
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65 | // TODO: can be optimized using SIOCGIFCOUNT |
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66 | // but maybe this way its more robust? |
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67 | // TODO: or using if_nameindex() problem is here, |
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68 | // that i don't know the number of ifaces returned ... |
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69 | |
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70 | struct ifconf ifconf; |
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71 | int ifnum = 5; |
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72 | int lastlen = 0; |
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73 | |
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74 | ifconf.ifc_buf = NULL; |
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75 | ifconf.ifc_len = 0; |
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76 | |
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77 | while( true ){ |
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78 | |
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79 | ifconf.ifc_len = sizeof(struct ifreq) * ifnum; |
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80 | ifconf.ifc_buf = (char*)realloc( ifconf.ifc_buf, ifconf.ifc_len ); |
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81 | |
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82 | int ret = ioctl( infoSocket, SIOCGIFCONF, &ifconf ); |
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83 | if (ret < 0){ |
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84 | logging_error( "getting interface list failed with: " << |
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85 | strerror(errno)); |
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86 | return retlist; |
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87 | } |
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88 | |
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89 | if( ifconf.ifc_len > lastlen ){ |
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90 | lastlen = ifconf.ifc_len; |
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91 | ifnum += 10; |
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92 | continue; |
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93 | } |
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94 | |
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95 | break; // length did not change any more, success |
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96 | } |
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97 | |
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98 | struct ifreq* ifr = ifconf.ifc_req; |
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99 | |
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100 | for (int i = 0; i<ifconf.ifc_len; i+=sizeof(struct ifreq), ifr++){ |
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101 | NetworkInterface interface; |
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102 | interface.name = string( ifr->ifr_name ); |
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103 | retlist.push_back( interface ); |
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104 | } |
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105 | |
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106 | free( ifconf.ifc_buf ); |
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107 | |
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108 | // |
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109 | // SIOCGIFCONF does not return interfaces that are currently |
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110 | // not running. therefore we try to complete the list of interfaces now |
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111 | // using getifaddrs. but we can't use _only_ getifaddrs, because |
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112 | // it only contains an interface it it has an address configured |
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113 | // |
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114 | |
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115 | struct ifaddrs* ifap; |
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116 | getifaddrs( &ifap ); |
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117 | |
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118 | for( struct ifaddrs* p = ifap; p != NULL; p=p->ifa_next ){ |
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119 | NetworkInterface interface; |
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120 | interface.name = string( p->ifa_name ); |
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121 | |
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122 | if( find(retlist.begin(), retlist.end(), interface) == retlist.end() ) |
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123 | retlist.push_back( interface ); |
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124 | } |
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125 | |
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126 | freeifaddrs( ifap ); |
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127 | |
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128 | // |
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129 | // now we start to complete the interface information. |
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130 | // we can't just call al IO ctrls and then get the |
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131 | // information, as some vars of the ifreq structure |
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132 | // hold several values, depending on the request |
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133 | // see /usr/include/net/if.h |
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134 | |
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135 | NetworkInterfaceList::iterator i = retlist.begin(); |
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136 | NetworkInterfaceList::iterator iend = retlist.end(); |
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137 | |
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138 | for( ; i != iend; i++ ){ |
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139 | |
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140 | NetworkInterface* interface = &(*i); |
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141 | struct ifreq ifr; |
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142 | |
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143 | memset( &ifr, 0, sizeof(struct ifreq) ); |
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144 | strcpy( ifr.ifr_name, i->name.c_str() ); |
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145 | |
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146 | |
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147 | { // get interface index |
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148 | if( ioctl(infoSocket, SIOCGIFINDEX, &ifr) ){ |
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149 | logging_error( "could not get interface index for " << |
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150 | i->name << ": " << strerror(errno) ); |
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151 | return retlist; |
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152 | } |
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153 | |
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154 | interface->index = ifr.ifr_ifindex; |
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155 | } |
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156 | |
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157 | { // get interface flags |
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158 | if( ioctl(infoSocket, SIOCGIFFLAGS, &ifr) ){ |
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159 | logging_error( "could not get interface flags for " << |
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160 | i->name << ": " << strerror(errno) ); |
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161 | return retlist; |
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162 | } |
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163 | |
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164 | interface->isRunning = (ifr.ifr_flags & IFF_RUNNING) != 0 ? true : false; |
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165 | interface->isUp = (ifr.ifr_flags & IFF_UP) != 0 ? true : false; |
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166 | interface->isLoopback = (ifr.ifr_flags & IFF_LOOPBACK) != 0 ? true : false; |
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167 | interface->isBroadcast = (ifr.ifr_flags & IFF_BROADCAST) != 0 ? true : false; |
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168 | interface->isMulticast = (ifr.ifr_flags & IFF_MULTICAST) != 0 ? true : false; |
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169 | } |
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170 | |
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171 | { // get mtu |
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172 | if( ioctl(infoSocket, SIOCGIFMTU, &ifr) ){ |
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173 | logging_error( "could not get mtu for " << |
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174 | i->name << ": " << strerror(errno) ); |
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175 | return retlist; |
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176 | } |
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177 | |
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178 | interface->mtu = ifr.ifr_mtu; |
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179 | } |
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180 | |
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181 | { // get tx queue length |
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182 | if( ioctl(infoSocket, SIOCGIFTXQLEN, &ifr) ){ |
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183 | logging_error( "could not get tx queue length for " << |
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184 | i->name << ": " << strerror(errno) ); |
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185 | return retlist; |
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186 | } |
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187 | |
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188 | interface->txQueueLen = ifr.ifr_qlen; |
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189 | } |
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190 | |
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191 | } // for( ; i != iend; i++ )*/ |
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192 | |
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193 | return retlist; |
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194 | } |
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195 | |
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196 | NetworkInterface NetworkInformation::getInterface(int index){ |
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197 | |
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198 | NetworkInterfaceList ifaces = getInterfaces(); |
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199 | NetworkInterfaceList::iterator i = ifaces.begin(); |
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200 | NetworkInterfaceList::iterator iend = ifaces.end(); |
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201 | |
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202 | for( ; i != iend; i++ ){ |
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203 | if( i->index == index ) return *i; |
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204 | } |
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205 | |
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206 | return NetworkInterface::UNDEFINED; |
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207 | } |
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208 | |
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209 | NetworkInterface NetworkInformation::getInterface(string name){ |
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210 | |
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211 | NetworkInterfaceList ifaces = getInterfaces(); |
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212 | NetworkInterfaceList::iterator i = ifaces.begin(); |
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213 | NetworkInterfaceList::iterator iend = ifaces.end(); |
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214 | |
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215 | for( ; i != iend; i++ ){ |
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216 | if( i->name.compare(name) == 0 ) return *i; |
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217 | } |
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218 | |
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219 | return NetworkInterface::UNDEFINED; |
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220 | } |
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221 | |
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222 | }} // namespace ariba, communication |
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