解析IP數(shù)據(jù)包課程設計

1、課程設計分析） ） 在 1 位 2 = 8 9C& 34程序運行結果5程序流程圖：包NY6八實習體會7九. 參考文獻： 譯 8程序源代碼#include winsock2.h#include ws2tcpip.h#include #include#include #pragma comment(lib,ws2_32.lib)using namespace std;typedef struct _IP_HEADERunionBYTE Version;BYTE HdrLen;/版本/ip 頭部長度;BYTE ServiceType;WORD TotalLen;WORD ID;/服務類型/總長度/標

2、識unionWORD Flags;WORD Fragoff;/標志/分段偏移BYTE TimeToLive;BYTE Protocol;WORD HdrChksum;DWORD SrcAddr;DWORD DstAddr;BYTE Options;IP_HEADER;int main ()/生命期/協(xié)議/頭校驗和/源地址/目的地址/選項SOCKET sock;WSADATA wsData;if (WSAStartup(MAKEWORD(2,2), &wsData) != 0)printf(WSAStartup failed!n);return -1;if ( ( sock = socket(A

3、F_INET, SOCK_RAW, IPPROTO_IP) ) =INVALID_SOCKET )9printf(create socket failedn);return -1;BOOL flag = true;if ( setsockopt(sock, IPPROTO_IP, IP_HDRINCL,(char*)&flag, sizeof(flag) = SOCKET_ERROR )printf(setsockopt failed!n);return -1;char hostName128;if ( gethostname(hostName, 100) = SOCKET_ERROR )pr

4、intf(gethostname failed!n);return -1;hostent* pHostIP;if( ( pHostIP = gethostbyname(hostName) ) = NULL )printf(gethostbyname failedn);return -1;sockaddr_in addr_in;addr_in.sin_addr = *(in_addr*)pHostIP-h_addr_list0;addr_in.sin_family = AF_INET;addr_in.sin_port = htons(6000);if ( bind(sock, (PSOCKADD

5、R)&addr_in, sizeof(addr_in) = SOCKET_ERROR )printf(bind failedn);return -1;#define IO_RCVALL _WSAIOW(IOC_VENDOR,1)DWORD dwBufferLen10;DWORD dwBufferInLen = 1;DWORD dwBytesReturned = 0;char buffer100;if ( WSAIoctl(sock, IO_RCVALL, &dwBufferInLen, sizeof(dwBufferInLen),&dwBufferLen, sizeof(dwBufferLen

6、), &dwBytesReturned, NULL, NULL) = SOCKET_ERROR )printf(ioctlsocket faildn);10return -1;printf(開始解析經(jīng)過本機的 IP 數(shù)據(jù)包!nn);while ( true )int size = recv(sock, buffer, sizeof(buffer), 0);IP_HEADER ip = *(IP_HEADER *)buffer;cout - endl;cout 版本: 4) endl;cout IP 頭部長度: ( (ip.HdrLen & 0 x0f) * 4) endl;cout 服務類型:

7、 Priority 5) , Service 1 ) & 0 x0f) endl;cout 總長度: ip.TotalLen endl;cout 標識符: ip.ID endl;cout 標志位: 15) & 0 x01) , DF = 14) & 0 x01) , Mf = 13) &0 x01) endl;cout 分段偏移: (ip.Fragoff & 0 x1fff) endl;cout 生存周期: (int)ip.TimeToLive endl;cout 協(xié)議: Protocol (int)ip.Protocol endl;cout 頭校驗和: ip.HdrChksum endl;cout 源地址: inet_ntoa(*(in_addr *)&ip.S