wake on lan - Writing Magic Packet in C++ -


i want send magic packet wake specific pc(specific mac address) connected mbed through lan . have found following code in code project.

my mac address : 00-c0-9f-bd-e4-3a (sample).....how can declare , fill in array.* have little knowledge in programming. please ignore mistake or miss interpretation.

byte magicp[102];

...

//fill in magic packet 102 bytes of data  //header  //fill 6 bytes 0xff  (int i=0;i<6;i++)     magicp[i] = 0xff; //first 6 bytes (these must repeated!!)  //fill bytes 6-12  (i=0;i<6;i++) {     //get 2 charachters mac address , convert int fill      //magic packet      magicp[i+6] = hexstrtoint(macaddr.mid(i*2,2)); }  //fill remaining 90 bytes (15 time repeat)  (i=0;i<15;i++) memcpy(&magicp[(i+2)*6],&magicp[6],6);

...

here have found code: http://www.codeproject.com/kb/ip/wol.aspx

i'm afraid not providing enough of code give unambiguous answer (a link might help), think don't have fill in magicp[] - code doing you. appears have provide hexadecimal mac address input in macaddr variable, string of 12 hexadecimal digits (e.g. "023fdca889fa").

edit: after reading link, consider hunch confirmed. code snippet shows how magicp[] array (which holds packet payload) constructed based on provided macaddr, in order illustrate theoretical explanation preceding it. somewhere there needs definition std::string macaddr; enter mac address, , passed calculation method.

i suggest download full source linked project (or other open wol program), give better understanding on how pieces fit together.


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