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            1CM

              

            UDP穿透Socks5代理

            ????SOCKS5 代理協議是他人定的,要編寫程序首先必須了解其協議規則。所以先必須仔細地閱讀rfc1928。這樣對能夠編寫socket程序員來講是易如反掌。本文是專門面對SOCKS5 UDP(無驗證方式)

            /*
            Test Socks5 UDP proxy
            Write by nenlong
            http://newnan.8u8.com
            mail:nnelong@tom.com
            At Yanji 2004.2.26
            send 5 0
            recv 5 0

            send 5 3 0 1 IP(4) Port(2)
            recv 5 0 0 1 IP(4) Port(2)

            data 0 0 0 1 IP(4) Port(2) DATA

            UDP ASSOCIATE
            The UDP ASSOCIATE request is used to establish an association within
            the UDP relay process to handle UDP datagrams. The DST.ADDR and
            DST.PORT fields contain the address and port that the client expects
            to use to send UDP datagrams on for the association. The server MAY
            use this information to limit access to the association. If the
            client is not in possesion of the information at the time of the UDP
            ASSOCIATE, the client MUST use a port number and address of all zeros.

            If the reply code (REP value of X'00') indicates a success, and the
            request was either a BIND or a CONNECT, the client may now start
            passing data.

            */
            #include "StdAfx.h"
            #include "winsock2.h"
            #include <stdlib.h>
            #include <conio.h>
            #include <ctype.h>
            void closesocks(SOCKET s);
            int senddata(char *data,int isize,sockaddr_in sa);//UDP
            #pragma comment (lib,"ws2_32.lib")
            char szMyIP[20];
            char szProxyIP[20];
            char szMsg[50];
            int isc;
            void main(void)
            {
            // 開始使用ws2_32.dll
            sprintf(szProxyIP,"192.168.0.1");

            WSADATA wsaData;
            int iRetVal,i;
            iRetVal = WSAStartup ( MAKEWORD ( 1,1 ), &wsaData );
            if ( 0 != iRetVal)
            {
            printf("WSAStartup %d", iRetVal );
            return;
            }
            printf("WSAStartup [OK]\n");


            //取得主機名稱
            char szhostname[128];
            if(SOCKET_ERROR ==gethostname(szhostname,128))
            {
            printf("gethostname %X\n",WSAGetLastError());
            return;
            }
            printf("hostname %s[OK]\n",szhostname);

            struct hostent FAR * lps;
            lps=gethostbyname(szhostname);
            if(lps==NULL)
            {
            printf("gethostbyname error\n");
            }
            else
            {
            IN_ADDR ia;
            memcpy(&ia,lps->h_addr_list[0],4);
            sprintf(szMyIP,"%s",inet_ntoa (ia));
            printf(" addr:%s\n",szMyIP);
            }

            //建立socket
            //AF_INET ---->to AF_INET for IPv4 addressing
            //SOCK_STREAM --->TCP
            SOCKET s;
            s=socket(AF_INET,SOCK_STREAM,0);
            if(s==INVALID_SOCKET)
            {
            printf("socket %X\r",WSAGetLastError());
            closesocket(s);
            return;
            }
            printf("socket TCP [OK]\n");
            sockaddr_in sa;
            sa.sin_family=AF_INET;
            sa.sin_port=htons(1080); //Port
            sa.sin_addr.s_addr= inet_addr(szProxyIP); //IP

            //建立連接 到代理服務器
            iRetVal=connect (s,(SOCKADDR*)&sa,sizeof(sockaddr_in));
            if(iRetVal==SOCKET_ERROR)
            {
            printf ("connect %X\n",WSAGetLastError());
            closesocket(s);
            return;
            }
            printf("connect %s %d[OK]\n",szProxyIP,1080);
            //請求無驗證
            char buff[255];
            buff[0]=5;buff[1]=0;
            iRetVal=send(s,buff,2,0);
            if(iRetVal==SOCKET_ERROR)
            {
            printf ("send 50 %X\n",WSAGetLastError());
            closesocket(s);
            return;
            }
            printf("Send 5 0 [OK]\n");
            memset(buff,0,4);
            printf("Recv ");
            iRetVal=recv(s,buff,4,0);
            printf("%02X %02X %02X %02X [OK]\n",buff[0],buff[1],buff[2],buff[3]);

            //返回 5 0 請求成功
            if(buff[0]!=5 || buff[1]!=0)
            {
            printf ("not proxy service\n");
            closesocket(s);
            return;
            }

            printf("find proxy server[OK]\n");

            //報文10字節

            buff[0]=5; //Ver
            buff[1]=3; //UDP
            buff[2]=0;
            buff[3]=1; //IP V4 address
            buff[4]=(unsigned char)0;
            buff[5]=(unsigned char)0;
            buff[6]=(unsigned char)0;
            buff[7]=(unsigned char)0;
            buff[8]=(unsigned char)0;
            buff[9]=(unsigned char)0;


            //發送報文
            iRetVal=send(s,buff,10,0);
            if(iRetVal==SOCKET_ERROR)
            {
            printf ("send 530100001388 %X\n",WSAGetLastError());
            closesocket(s);
            return;
            }
            printf("Send 05 03 00 01 00 00 00 00 00 00 [OK]\n");
            memset(buff,0,10);
            iRetVal=recv(s,buff,10,0);
            if(iRetVal==SOCKET_ERROR)
            {
            printf ("recv %X\n",WSAGetLastError());
            closesocket(s);
            return;
            }
            printf("Recv ");
            for(i=0;i<10;i++)
            printf ("%02X ",(unsigned char)buff[i]);
            printf("[OK]\n");
            if(buff[0]!=5 || buff[1]!=0)
            {
            printf ("not UDP proxy service\n");
            closesocket(s);
            return;
            }

            char szIP[20];
            sprintf(szIP,"%d.%d.%d.%d",
            (unsigned char)buff[4],
            (unsigned char)buff[5],
            (unsigned char)buff[6],
            (unsigned char)buff[7]);
            int port;
            port=(buff[8]<<8)+buff[9];
            Sleep(500);
            printf("UDP Proxy Add:%s Port:%d\nPress any key Send ...\n",szIP,port);
            getch();
            isc=0;
            int ikey;
            while((ikey=getch())!=0x1b)
            {
            //send data
            sockaddr_in sato;
            sato.sin_family=AF_INET;
            sato.sin_port=htons(port);
            sato.sin_addr.s_addr= inet_addr(szIP);

            buff[0]=0; //RSV
            buff[1]=0; //RSV
            buff[2]=0; //FRAG
            buff[3]=1; //IPV4
            buff[4]=(unsigned char)192;
            buff[5]=(unsigned char)168;
            buff[6]=(unsigned char)0;
            buff[7]=(unsigned char)1;
            buff[8]=(unsigned char)0x13;
            buff[9]=(unsigned char)0x88;//5000

            isc++;
            if(isc>50)isc=0;
            if(ikey==17) //ctrl+Q
            sprintf(szMsg,"Q");
            else
            sprintf(szMsg,"Hello SOCKS5 (UDP) %d ",isc);

            for(i=0;i<(int)strlen(szMsg);i++)
            {
            buff[10+i]=szMsg[i];
            }
            buff[10+i]=0;

            senddata(buff,10+strlen(szMsg)+1,sato);

            if(iRetVal==SOCKET_ERROR)
            {
            printf ("send data %X\n",WSAGetLastError());
            closesocket(s);
            return;
            }
            printf("Press ESC key to exit Ctrl+Q Close RECV5000 Windows\n");
            }
            closesocket(s);
            return;
            }

            void closesocks(SOCKET s)
            {
            closesocket(s);
            WSACleanup();
            }

            int senddata(char *data,int isize,sockaddr_in sa)
            {
            int ret,i;
            SOCKET s;
            s=socket(AF_INET,SOCK_DGRAM,0);
            ret=connect(s,(SOCKADDR*)&sa,sizeof(sockaddr_in));
            if(ret==SOCKET_ERROR)
            {
            printf("UDP connect %X\n",ret);
            closesocket(s);
            return ret;
            }
            printf("UDP Send IP:%s Port:%d\nSend ",inet_ntoa (sa.sin_addr),ntohs (sa.sin_port));
            for(i=0;i<isize;i++)
            printf("%02X ",(unsigned char)data[i]);
            printf("\n\n");
            ret=send(s,data,isize,0);
            closesocket(s);
            return ret;
            }


              以上即關于UDP穿透Socks5代理(無驗證)的一點心得,希望能夠得到大家的指正。

            posted on 2007-03-13 10:32 1CM 閱讀(3002) 評論(0)  編輯 收藏 引用

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