傳送自定義ip包：
public struct ip_hdr //ip頭
public struct tcp_hdr //tcp頭
public struct psd_hdr //tcp偽首部，用來計算校驗和，無意義
//開始
private void button1_click(object sender, eventargs e)
if (radiobutton2.checked && t_count.text == "")
return;
//建立原始套接字
socket s;
trycatch (socketexception ee)
//建立ip頭
ip_hdr myip_hdr = new ip_hdr();
tcp_hdr mytcp_hdr = new tcp_hdr();
myip_hdr.h_lenver = (byte)(4 << 4 | marshal.sizeof(myip_hdr) / sizeof(uint));
myip_hdr.total_len = (ushort)(marshal.sizeof(myip_hdr) + marshal.sizeof(mytcp_hdr));
myip_hdr.ident = 1;
myip_hdr.frag_and_flags = 0;
myip_hdr.ttl = 128;
myip_hdr.proto = 6;
myip_hdr.checksum = 0;
myip_hdr.sourceip=(uint)ipaddress.parse(t_locip.text).address;
myip_hdr.destip = (uint)ipaddress.parse(t_remoip.text).address;
//建立tcp頭
mytcp_hdr.th_sport = convert.touint16(t_locport.text);
mytcp_hdr.th_dport = convert.touint16(t_remoport.text);
mytcp_hdr.th_seq=0x12345678;//32位序列號
mytcp_hdr.th_ack = 0;
mytcp_hdr.th_lenres = (byte)(marshal.sizeof(mytcp_hdr) / 4 << 4 | 0);
mytcp_hdr.th_flag = 2;//修改這裡來實現不同的標誌位探測，2是syn，1是fin，16是ack探測 等等
mytcp_hdr.th_win = 512;
mytcp_hdr.th_urp = 0;
mytcp_hdr.th_sum = 0;
//偽tcp頭
psd_hdr mypsd_hdr = new psd_hdr();
mypsd_hdr.saddr = myip_hdr.sourceip;
mypsd_hdr.daddr = myip_hdr.destip;
mypsd_hdr.mbz = 0;
mypsd_hdr.ptcl = 6;
mypsd_hdr.tcpl =(ushort) marshal.sizeof(mytcp_hdr);
//計算校驗和
byte psdbytes = structtobytes(mypsd_hdr);
byte tcpbytes = structtobytes(mytcp_hdr);
byte buffer=new byte[psdbytes.length+tcpbytes.length];
psdbytes.copyto(buffer, 0);
tcpbytes.copyto(buffer, psdbytes.length);
uint16 myarray1 = bytetouint16(buffer);
mytcp_hdr.th_sum = checksum(myarray1, myarray1.length);
byte ipbytes = structtobytes(myip_hdr);
buffer=new byte[ipbytes.length+tcpbytes.length];
ipbytes.copyto(buffer,0);
tcpbytes.copyto(buffer, ipbytes.length);
uint16 myarray2 = bytetouint16(buffer);
myip_hdr.checksum = checksum(myarray2,myarray2.length);
ipbytes = structtobytes(myip_hdr);
ipbytes.copyto(buffer, 0); //buffer即為要傳送的偽ip包
//傳送ip包
ipendpoint remoend = new ipendpoint(ipaddress.parse(t_remoip.text), convert.toint16(t_remoport.text));
trycatch (socketexception ex)
}//計算校驗和
public uint16 checksum(uint16 buffer, int size)
cksum = (cksum >> 16) + (cksum & 0xffff);
cksum += (cksum >> 16);
return (uint16)(~cksum);
} //struct型別轉換成byte
public static byte structtobytes(object structobj)
finally
}
//byte轉換成uint16
public static uint16 bytetouint16(byte putin)
return retarray;
}//顯示byte的內容
public static string displaybyte(byte putin)
C VC自定義發IP包例子
自定義發ip包例子 tcp ip包傳送 給目標主機的埠傳送乙個 syn請求,注意目標主機的資訊會發給傳送ip位址的主機 這說明tcp ip協議本身有ip期騙的漏洞 這種方運可以自己寫成特殊的基於ip協議上層的自定義協議 include include include include include ...
C VC自定義發IP包例子
自定義發ip包例子 tcp ip包傳送 給目標主機的埠傳送乙個 syn請求,注意目標主機的資訊會發給傳送ip位址的主機 這說明tcp ip協議本身有ip期騙的漏洞 這種方運可以自己寫成特殊的基於ip協議上層的自定義協議 include include include include include ...
Python3中自定義包和匯入自定義包
第一篇部落格，寫得質量可能會不高，但希望能開個好頭，努力成為優秀的程式設計師！今天在惡補python基礎知識，發現我對包，庫，模組的定義非常模糊，於是我回頭看了一下基礎知識，也是一時興起想讓跟我一樣一開始有些困惑的人避坑！要想知道什麼是包，得先了解一下模組的概念！知道了模組，那緊接著看看包 上面是我...