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1 /***************************************************************************** |
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2 * |
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3 * $Id$ |
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4 * |
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5 * Copyright (C) 2006-2014 Florian Pose, Ingenieurgemeinschaft IgH |
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6 * |
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7 * This file is part of the IgH EtherCAT Master. |
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8 * |
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9 * The IgH EtherCAT Master is free software; you can redistribute it and/or |
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10 * modify it under the terms of the GNU General Public License version 2, as |
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11 * published by the Free Software Foundation. |
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12 * |
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13 * The IgH EtherCAT Master is distributed in the hope that it will be useful, |
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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16 * Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU General Public License along |
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19 * with the IgH EtherCAT Master; if not, write to the Free Software |
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20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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21 * |
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22 * --- |
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23 * |
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24 * The license mentioned above concerns the source code only. Using the |
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25 * EtherCAT technology and brand is only permitted in compliance with the |
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26 * industrial property and similar rights of Beckhoff Automation GmbH. |
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27 * |
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28 * vim: expandtab |
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29 * |
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30 ****************************************************************************/ |
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31 |
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32 #include <sys/types.h> |
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33 #include <sys/socket.h> |
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34 #include <netdb.h> |
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35 |
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36 #include <iostream> |
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37 #include <algorithm> |
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38 using namespace std; |
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39 |
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40 #include "CommandIp.h" |
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41 #include "MasterDevice.h" |
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42 |
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43 /*****************************************************************************/ |
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44 |
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45 CommandIp::CommandIp(): |
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46 Command("ip", "Set EoE IP parameters.") |
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47 { |
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48 } |
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49 |
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50 /*****************************************************************************/ |
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51 |
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52 string CommandIp::helpString(const string &binaryBaseName) const |
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53 { |
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54 stringstream str; |
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55 |
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56 str << binaryBaseName << " " << getName() << " [OPTIONS] <ARGS>" << endl |
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57 << endl |
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58 << getBriefDescription() << endl |
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59 << endl |
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60 << "This command requires a single slave to be selected." << endl |
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61 << endl |
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62 << "IP parameters can be appended as argument pairs:" << endl |
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63 << endl |
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64 << " addr <IPv4>[/prefix] IP address (optionally with" << endl |
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65 << " decimal subnet prefix)" << endl |
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66 << " link <MAC> Link-layer address (may contain" << endl |
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67 << " colons or hyphens)" << endl |
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68 << " default <IPv4> Default gateway" << endl |
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69 << " dns <IPv4> DNS server" << endl |
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70 << " name <hostname> Host name (max. 32 byte)" << endl |
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71 << endl |
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72 << "IPv4 adresses can be given either in dot notation or as" << endl |
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73 << "hostnames, which will be automatically resolved." << endl |
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74 << endl |
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75 << "Command-specific options:" << endl |
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76 << " --alias -a <alias>" << endl |
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77 << " --position -p <pos> Slave selection. See the help of" << endl |
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78 << " the 'slaves' command." << endl |
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79 << endl |
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80 << numericInfo(); |
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81 |
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82 return str.str(); |
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83 } |
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84 |
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85 /****************************************************************************/ |
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86 |
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87 void CommandIp::execute(const StringVector &args) |
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88 { |
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89 if (args.size() <= 0) { |
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90 return; |
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91 } |
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92 |
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93 if (args.size() % 2) { |
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94 stringstream err; |
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95 err << "'" << getName() << "' needs an even number of arguments!"; |
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96 throwInvalidUsageException(err); |
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97 } |
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98 |
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99 ec_ioctl_slave_eoe_ip_t io = {}; |
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100 |
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101 for (unsigned int argIdx = 0; argIdx < args.size(); argIdx += 2) { |
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102 string arg = args[argIdx]; |
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103 string val = args[argIdx + 1]; |
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104 std::transform(arg.begin(), arg.end(), arg.begin(), ::tolower); |
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105 |
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106 if (arg == "link") { |
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107 parseMac(io.mac_address, val); |
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108 io.mac_address_included = 1; |
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109 } |
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110 else if (arg == "addr") { |
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111 parseIpv4Prefix(&io, val); |
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112 io.ip_address_included = 1; |
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113 } |
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114 else if (arg == "default") { |
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115 resolveIpv4(&io.gateway, val); |
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116 io.gateway_included = 1; |
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117 } |
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118 else if (arg == "dns") { |
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119 resolveIpv4(&io.dns, val); |
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120 io.dns_included = 1; |
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121 } |
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122 else if (arg == "name") { |
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123 if (val.size() > EC_MAX_HOSTNAME_SIZE - 1) { |
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124 stringstream err; |
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125 err << "Name too long!"; |
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126 throwInvalidUsageException(err); |
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127 } |
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128 unsigned int i; |
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129 for (i = 0; i < val.size(); i++) { |
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130 io.name[i] = val[i]; |
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131 } |
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132 io.name[i] = 0; |
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133 io.name_included = 1; |
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134 } |
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135 else { |
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136 stringstream err; |
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137 err << "Unknown argument '" << args[argIdx] << "'!"; |
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138 throwInvalidUsageException(err); |
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139 } |
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140 } |
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141 |
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142 MasterDevice m(getSingleMasterIndex()); |
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143 m.open(MasterDevice::ReadWrite); |
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144 SlaveList slaves = selectedSlaves(m); |
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145 if (slaves.size() != 1) { |
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146 throwSingleSlaveRequired(slaves.size()); |
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147 } |
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148 io.slave_position = slaves.front().position; |
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149 |
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150 // execute actual request |
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151 try { |
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152 m.setIpParam(&io); |
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153 } catch (MasterDeviceException &e) { |
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154 throw e; |
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155 } |
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156 } |
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157 |
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158 /*****************************************************************************/ |
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159 |
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160 void CommandIp::parseMac(unsigned char mac[EC_ETH_ALEN], const string &str) |
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161 { |
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162 unsigned int pos = 0; |
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163 |
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164 for (unsigned int i = 0; i < EC_ETH_ALEN; i++) { |
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165 if (pos + 2 > str.size()) { |
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166 stringstream err; |
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167 err << "Incomplete MAC address!"; |
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168 throwInvalidUsageException(err); |
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169 } |
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170 |
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171 string byteStr = str.substr(pos, 2); |
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172 pos += 2; |
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173 |
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174 stringstream s; |
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175 s << byteStr; |
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176 unsigned int byteValue; |
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177 s >> hex >> byteValue; |
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178 if (s.fail() || !s.eof() || byteValue > 0xff) { |
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179 stringstream err; |
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180 err << "Invalid MAC address!"; |
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181 throwInvalidUsageException(err); |
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182 } |
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183 mac[i] = byteValue; |
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184 |
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185 while (pos < str.size() && (str[pos] == ':' || str[pos] == '-')) { |
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186 pos++; |
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187 } |
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188 } |
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189 } |
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190 |
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191 /*****************************************************************************/ |
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192 |
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193 void CommandIp::parseIpv4Prefix(ec_ioctl_slave_eoe_ip_t *io, |
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194 const string &str) |
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195 { |
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196 size_t pos = str.find('/'); |
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197 string host; |
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198 |
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199 io->subnet_mask_included = pos != string::npos; |
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200 |
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201 if (pos == string::npos) { // no prefix found |
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202 host = str; |
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203 } |
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204 else { |
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205 host = str.substr(0, pos); |
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206 string prefixStr = str.substr(pos + 1, string::npos); |
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207 stringstream s; |
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208 s << prefixStr; |
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209 unsigned int prefix; |
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210 s >> prefix; |
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211 if (s.fail() || !s.eof() || prefix > 32) { |
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212 stringstream err; |
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213 err << "Invalid prefix '" << prefixStr << "'!"; |
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214 throwInvalidUsageException(err); |
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215 } |
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216 uint32_t mask = 0; |
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217 for (unsigned int bit = 0; bit < prefix; bit++) { |
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218 mask |= (1 << (31 - bit)); |
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219 } |
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220 io->subnet_mask = htonl(mask); |
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221 } |
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222 |
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223 resolveIpv4(&io->ip_address, host); |
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224 } |
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225 |
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226 /*****************************************************************************/ |
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227 |
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228 void CommandIp::resolveIpv4(uint32_t *addr, const string &str) |
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229 { |
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230 struct addrinfo hints = {}; |
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231 struct addrinfo *res; |
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232 |
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233 hints.ai_family = AF_INET; // only IPv4 |
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234 |
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235 int ret = getaddrinfo(str.c_str(), NULL, &hints, &res); |
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236 if (ret) { |
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237 stringstream err; |
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238 err << "Lookup of '" << str << "' failed: " |
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239 << gai_strerror(ret) << endl; |
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240 throwCommandException(err.str()); |
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241 } |
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242 |
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243 if (!res) { // returned list is empty |
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244 stringstream err; |
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245 err << "Lookup of '" << str << "' failed." << endl; |
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246 throwCommandException(err.str()); |
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247 } |
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248 |
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249 sockaddr_in *sin = (sockaddr_in *) res->ai_addr; |
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250 for (unsigned int i = 0; i < 4; i++) { |
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251 ((unsigned char *) addr)[i] = |
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252 ((unsigned char *) &sin->sin_addr.s_addr)[i]; |
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253 } |
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254 |
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255 freeaddrinfo(res); |
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256 } |
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257 |
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258 /****************************************************************************/ |