1 | %------------------------------------------------------------------------- |
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2 | % WARPLab Framework |
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3 | % |
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4 | % Copyright 2013, Mango Communications. All rights reserved. |
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5 | % Distributed under the WARP license (http://warpproject.org/license) |
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6 | % |
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7 | % Chris Hunter (chunter [at] mangocomm.com) |
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8 | % Patrick Murphy (murphpo [at] mangocomm.com) |
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9 | % Erik Welsh (welsh [at] mangocomm.com) |
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10 | %------------------------------------------------------------------------- |
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11 | |
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12 | classdef wl_transport_eth_udp_java_bcast < wl_transport & handle_light |
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13 | % Java physical layer Ethernet UDP Transport for broadcast traffic |
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14 | % User code should not use this object directly-- the parent wl_node will |
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15 | % instantiate the appropriate transport object for the hardware in use |
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16 | |
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17 | %******************************** Properties ********************************** |
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18 | |
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19 | properties (SetAccess = protected, Hidden = true) |
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20 | sock; |
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21 | status; |
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22 | isopen; |
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23 | maxPayload; |
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24 | end |
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25 | |
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26 | properties (SetAccess = public) |
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27 | hdr; |
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28 | address; |
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29 | port; |
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30 | rxBufferSize; |
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31 | end |
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32 | |
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33 | %********************************* Methods ************************************ |
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34 | |
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35 | methods |
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36 | function obj = wl_transport_eth_udp_java_bcast() |
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37 | obj.hdr = wl_transport_header; |
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38 | |
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39 | % At the moment, a trigger is the only type of broadcast packet. |
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40 | % In a future release this type will be exposed to objects that |
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41 | % create the broadcast transport object. |
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42 | obj.hdr.pktType = obj.hdr.PKTTYPE_TRIGGER; |
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43 | obj.checkSetup(); |
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44 | obj.status = 0; |
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45 | |
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46 | configFile = which('wl_config.ini'); |
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47 | |
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48 | if(isempty(configFile)) |
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49 | error('cannot find wl_config.ini. please run wl_setup.m'); |
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50 | end |
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51 | |
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52 | readKeys = {'network', '', 'host_address', ''}; |
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53 | IP = inifile(configFile,'read',readKeys); |
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54 | IP = IP{1}; |
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55 | IP = sscanf(IP,'%d.%d.%d.%d'); |
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56 | |
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57 | readKeys = {'network', '', 'host_ID', []}; |
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58 | hostID = inifile(configFile,'read',readKeys); |
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59 | hostID = hostID{1}; |
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60 | hostID = sscanf(hostID,'%d'); |
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61 | |
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62 | readKeys = {'network', '', 'bcast_port', []}; |
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63 | bcastport = inifile(configFile,'read',readKeys); |
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64 | bcastport = bcastport{1}; |
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65 | bcastport = sscanf(bcastport,'%d'); |
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66 | |
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67 | obj.address = sprintf('%d.%d.%d.%d',IP(1),IP(2),IP(3),255); |
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68 | obj.port = bcastport; |
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69 | obj.hdr.srcID = hostID; |
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70 | obj.hdr.destID = 65535; % Changed from 255 in WARPLab 7.1.0 |
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71 | obj.maxPayload = 1000; % Default value; Can explicitly set a different maxPayload if |
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72 | % you are certain that all nodes support a larger packet size. |
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73 | end |
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74 | |
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75 | function checkSetup(obj) |
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76 | % Currently not implemented |
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77 | end |
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78 | |
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79 | function setMaxPayload(obj,value) |
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80 | obj.maxPayload = value; |
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81 | end |
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82 | |
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83 | function out = getMaxPayload(obj) |
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84 | out = double(obj.maxPayload); |
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85 | end |
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86 | |
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87 | function open(obj,varargin) |
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88 | % varargin{1}: (optional) IP address |
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89 | % varargin{2}: (optional) port |
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90 | % |
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91 | REQUESTED_BUF_SIZE = 2^22; |
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92 | |
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93 | import java.io.* |
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94 | import java.net.DatagramSocket |
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95 | import java.net.DatagramPacket |
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96 | import java.net.InetAddress |
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97 | |
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98 | if(isempty(obj.isopen)) |
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99 | if(nargin==3) |
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100 | if(ischar(varargin{1})) |
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101 | obj.address = varargin{1}; |
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102 | else |
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103 | obj.address = obj.int2IP(varargin{1}); |
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104 | end |
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105 | obj.port = varargin{2}; |
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106 | end |
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107 | |
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108 | obj.sock = DatagramSocket(); |
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109 | |
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110 | obj.sock.setSoTimeout(2000); |
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111 | obj.sock.setReuseAddress(1); |
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112 | obj.sock.setBroadcast(true); |
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113 | obj.sock.setSendBufferSize(REQUESTED_BUF_SIZE); |
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114 | obj.sock.setReceiveBufferSize(REQUESTED_BUF_SIZE); |
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115 | |
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116 | x = obj.sock.getReceiveBufferSize(); |
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117 | |
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118 | if(x < REQUESTED_BUF_SIZE) |
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119 | fprintf('OS reduced recv buffer size to %d\n', x); |
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120 | end |
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121 | |
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122 | obj.rxBufferSize = x; |
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123 | obj.status = 1; |
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124 | obj.isopen = 1; |
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125 | end |
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126 | end |
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127 | |
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128 | function close(obj) |
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129 | try |
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130 | obj.sock.close(); |
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131 | catch closeError |
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132 | warning( 'Error closing socket; java error was %s', closeError.message) |
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133 | end |
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134 | |
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135 | obj.status=0; |
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136 | end |
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137 | |
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138 | function delete(obj) |
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139 | obj.close(); |
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140 | end |
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141 | |
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142 | function flush(obj) |
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143 | % Currently not implemented |
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144 | end |
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145 | end %methods |
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146 | |
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147 | methods (Hidden = true) |
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148 | function send(obj, type, varargin) |
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149 | % varargin{1}: data |
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150 | |
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151 | import java.io.* |
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152 | import java.net.DatagramSocket |
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153 | import java.net.DatagramPacket |
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154 | import java.net.InetAddress |
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155 | |
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156 | switch(lower(type)) |
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157 | case 'trigger' |
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158 | bitset(obj.hdr.flags,1,0); % no response |
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159 | obj.hdr.pktType = obj.hdr.PKTTYPE_TRIGGER; |
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160 | case 'message' |
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161 | obj.hdr.pktType = obj.hdr.PKTTYPE_HTON_MSG; |
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162 | end |
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163 | |
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164 | data = uint32(varargin{1}); |
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165 | |
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166 | obj.hdr.msgLength = (length(data))*4; %Length in bytes |
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167 | obj.hdr.flags = bitset(obj.hdr.flags,1,0); |
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168 | obj.hdr.increment; |
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169 | |
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170 | data = [obj.hdr.serialize,data]; |
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171 | data8 = [zeros(1,2,'uint8') typecast(swapbytes(uint32(data)),'uint8')]; |
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172 | |
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173 | jaddr = InetAddress.getByName(obj.address); |
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174 | |
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175 | pkt_send = DatagramPacket(data8, length(data8), jaddr, obj.port); |
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176 | obj.sock.send(pkt_send); |
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177 | end |
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178 | |
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179 | function dottedIPout = int2IP(obj,intIn) |
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180 | addrChars(4) = mod(intIn, 2^8); |
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181 | addrChars(3) = mod(bitshift(intIn, -8), 2^8); |
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182 | addrChars(2) = mod(bitshift(intIn, -16), 2^8); |
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183 | addrChars(1) = mod(bitshift(intIn, -24), 2^8); |
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184 | dottedIPout = sprintf('%d.%d.%d.%d', addrChars); |
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185 | end |
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186 | |
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187 | function intOut = IP2int(obj,dottedIP) |
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188 | addrChars = sscanf(dottedIP, '%d.%d.%d.%d')'; |
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189 | intOut = 2^0 * addrChars(4) + 2^8 * addrChars(3) + 2^16 * addrChars(2) + 2^24 * addrChars(1); |
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190 | end |
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191 | end |
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192 | end % classdef |
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