在C++上创建魔术包

Question

我正在尝试装箱一个魔术数据包以在某台PC上应用WOL，我尝试以与数据包在Wireshark捕获中的外观完全相同的格式执行此操作，但是PC无法将接收数据包识别为魔术数据包

这是代码：

UINT8*  CTestCase::CreateMagicPacket(IN OUT UINT8* p_buffer, IN int  size, IN MACAddress src, IN MACAddress dst)
{
UINT8 *my_buff_to_send = new UINT8[size]{ 0 }; //create new buffer with the size we want

for (int i = 0; i < 6; i++) //broadcast address
{
my_buff_to_send[i] = 0xFF;
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[i]));
}
int m = 5;
for (size_t i = 6; i < 12; i++) //insert source mac adress to the new buffer
{
my_buff_to_send[i] = src.Get(m);
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[i]));
m--;
}

my_buff_to_send[12] = 0x08;
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[12]));
my_buff_to_send[13] = 0x00;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[13]));
my_buff_to_send[14] =  0x45;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[14]));
my_buff_to_send[15] = 0x00;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[15]));
my_buff_to_send[16] = 0x00;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[16]));
my_buff_to_send[17] =  0x90;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[17]));
my_buff_to_send[18] = 0x48;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[18]));
my_buff_to_send[19] = 0x91;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[19]));
my_buff_to_send[20] = 0x00;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[20]));
my_buff_to_send[21] = 0x00;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[21]));
my_buff_to_send[22] = 0x80;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[22]));
my_buff_to_send[23] = 0x11;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[23]));
my_buff_to_send[24] = 0x00;  //insert permanent type to the buffer OR dd
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[24]));
my_buff_to_send[25] = 0x00;  //insert permanent type to the buffer OR bd
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[25]));
my_buff_to_send[26] = 0x0a;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[26]));
my_buff_to_send[27] = 0x0a;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[27]));
my_buff_to_send[28] = 0x0a;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[28]));
my_buff_to_send[29] = 0x05;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[29]));
my_buff_to_send[30] = 0xff;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[30]));
my_buff_to_send[31] = 0xff;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[31]));
my_buff_to_send[32] = 0xff;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[32]));
my_buff_to_send[33] = 0xff;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[33]));
my_buff_to_send[34] = 0xd0;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[34]));
my_buff_to_send[35] = 0x28;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[35]));
my_buff_to_send[36] = 0xff;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[36]));
my_buff_to_send[37] = 0xff;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[37]));
my_buff_to_send[38] = 0x00;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[38]));
my_buff_to_send[39] = 0x7c;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[39]));
my_buff_to_send[40] = 0x14;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[40]));
my_buff_to_send[41] = 0x9c;  //insert permanent type to the buffer
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[41]));

for (int i = 42; i < 48; i++)
{
my_buff_to_send[i] = 0xFF;
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[i]));
}
int r = 5;
for (size_t i = 48; i < 54; i++) //insert source mac adress to the new buffer
{
my_buff_to_send[i] = dst.Get(r);
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[i]));
r--;
}
for (int i = 54; i < 60; i++)
{
my_buff_to_send[i] = 0xFF;
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[i]));
}

for (size_t j = 0; j < 16; j++)
{
for (int k = 5; k >= 0; k--) //insert destination mac adress to the buffer
{
int i = 60;
my_buff_to_send[i] = dst.Get(k);
m_pLog->AddMessage(" |");
m_pLog->AddMessage("%d ", UINT32(my_buff_to_send[i]));
i++;
}
}

return my_buff_to_send;


};

Answer 1

您真的需要自己创建原始以太网数据包吗？

当我完成此操作时，我只是将魔术数据包嵌入到类似UDP数据包的东西中，然后广播它。例如：

#include "sock2/sock2.h"
int main() { 
std::string MAC_address("x00x00x00x00x00x00", 6);
std::string buffer("xffxffxffxffxffxff");
for (int i=0; i<16; i++)
buffer.append(MAC_address);
IP::UDP::socket s;
s.setopt(SO_BROADCAST);
IP::address addr(192, 168, 0, 255, 5);
s.send(buffer, addr);
}

这是非常简约的(例如，硬编码地址，几乎没有错误检查(，但是为MAC地址使用适当的字节就可以了。我没有尝试详细分析您的所有代码，但它似乎确实包含比我预期的通常必要的更多内容。