/*
發(fā)布時間: 2008-12-27
程序版本: vtcp.dll ver1.0.0(beta0)
模塊下載BIN: http://www.cnasm.com/down/vtcp.dll
測試程序BIN: http://www.cnasm.com/down/vtcptest.exe
測試程序SRC: http://www.cnasm.com/down/vtcptest.rar
吹一下: 別看vtcp程序小(17KB)但幾乎模擬了TCP的一切,滑動窗口...目前他提供阻塞模式與異步完成模式API支持.
目前局網(wǎng)效率:
以UDP可靠傳輸文件為例,10OMbps局網(wǎng)傳輸極限速度(6MB/S),網(wǎng)絡(luò)占有率50%
高于TCP協(xié)議(5MB/S),網(wǎng)絡(luò)占有率50%,如何進一步提高UDP傳輸效率,還需要研究實驗,我想我應(yīng)該接近極限了,
目前要做的就是提高vtcp的穩(wěn)定性與兼容winsock編程接口.
目前外網(wǎng)效率:
以UDP可靠傳輸文件為例,外網(wǎng)與TCP協(xié)議相當,TCP(50KB/S)時,測試VTCP(30-110KB/S).
vtcptest -s port : 打開服務(wù)端口
vtcptest -c host port path 下載文件
例如:
開服務(wù)執(zhí)行: vtcptest -s 8080
下文件執(zhí)行: vtcptest -c 192.168.0.102 8080 c:\1234.rmvb
connect...
connect ok!
save to: c:\1234.rmvb.download
recv: 214245376 bytes, rapid: 6152 kb/s
download ok ( 214592451 bytes )!!!
quit...
*/
//API接口
#pragma once
int WINAPI vtcp_startup();
int WINAPI vtcp_cleanup();
int WINAPI vtcp_socket(int type);//0=tcp client socket,1=tcp service socket
int WINAPI vtcp_bind(int s,PSOCKADDR_IN sai,int sailen);
int WINAPI vtcp_listen(int s,int backlog);
int WINAPI vtcp_accept(int s);
int WINAPI vtcp_connect(int s,PSOCKADDR_IN sai,int sailen,int timeo);
int WINAPI vtcp_sendex(int s,LPWSABUF lpBuffers,DWORD dwBufferCount,LPDWORD lpNumberOfBytesSent,
DWORD dwFlags,LPWSAOVERLAPPED lpOverlapped,LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine);
int WINAPI vtcp_recvex(int s,LPWSABUF lpBuffers,DWORD dwBufferCount,LPDWORD lpNumberOfBytesRecvd,
LPDWORD lpFlags,LPWSAOVERLAPPED lpOverlapped,LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine);
int WINAPI vtcp_send(int s,PCHAR buf,int len);
int WINAPI vtcp_recv(int s,PCHAR buf,int len);
int WINAPI vtcp_closesocket(int s);
int WINAPI vtcp_getlasterror(int s);
//////////////////////////////////////////////////////////////////////////
//int WINAPI vtcp_setkeepalive(int keepalive,int keepaliveinternal);
//int WINAPI vtcp_setsendtimeo(int timeo);
//int WINAPI vtcp_setrecvtimeo(int timeo);
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
//測試程序VC++ console 代碼
//////////////////////////////////////////////////////////////////////////
// vtcptest.cpp : 定義控制臺應(yīng)用程序的入口點。 // #include "stdafx.h" ULONG WINAPI TA(LPVOID p) { int s=int(p);char buffer[8192];while(true){int rcb=vtcp_recv(s,buffer,sizeof(buffer));if(rcb<0){vtcp_closesocket(s); return0;}HANDLE hfile=CreateFile(buffer,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,0,NULL); if(INVALID_HANDLE_VALUE==hfile){vtcp_closesocket(s); return0;}DWORD cb=(-1); while(true){if(!ReadFile(hfile,buffer,8192,&cb,NULL)){break;}if(cb==0){break;}if(0>=vtcp_send(s,buffer,cb)){break;}}CloseHandle(hfile); if(cb==0){if(0>=vtcp_send(s,"X",1)){vtcp_closesocket(s); return0;}}else{vtcp_closesocket(s); return0;}}return0;} ULONG WINAPI TS(DWORD port) { SOCKADDR_IN sai; sai.sin_family=AF_INET; sai.sin_addr.S_un.S_addr=0; sai.sin_port=htons(WORD(port)); int s=vtcp_socket(1);if(0==s){return SOCKET_ERROR;}if(0!=vtcp_bind(s,&sai,sizeof(sai))){return SOCKET_ERROR;}if(0!=vtcp_listen(s,5)){return SOCKET_ERROR;}printf("listen success...\r\n"); while(true){int as=vtcp_accept(s);if(0!=as){DWORD dwtid; CloseHandle(CreateThread(NULL,0,TA,LPVOID(as),0,&dwtid)); printf("accept success...\r\n"); }}vtcp_closesocket(s); return0;} ULONG WINAPI TC(PCHAR host,DWORD port,PCHAR path) { PHOSTENT ph=gethostbyname(host); if(NULL==ph){return0;}SOCKADDR_IN sai; sai.sin_family=AF_INET; sai.sin_addr.S_un.S_addr=*LPDWORD(ph->h_addr_list[0]); sai.sin_port=htons(WORD(port)); int s=vtcp_socket(0);printf("connect...\r\n"); if(vtcp_connect(s,&sai,sizeof(sai),1000*30)){vtcp_closesocket(s); return0;}printf("connect ok!\r\n"); if(0>=vtcp_send(s,path,1024)){vtcp_closesocket(s); return0;}char buffer[8192];lstrcpy(buffer,path); lstrcat(buffer,".download"); printf("save to: %s\r\n",buffer); HANDLE hfile=CreateFile(buffer,GENERIC_WRITE,FILE_SHARE_READ,NULL,CREATE_ALWAYS,0,NULL); if(INVALID_HANDLE_VALUE==hfile){vtcp_closesocket(s); return0;}DWORD wcb,count=0; DWORD dw=GetTickCount(); DWORD dwsize=0,dwrapid; while(true){int rcb=vtcp_recv(s,buffer,sizeof(buffer));if(rcb==1){if(buffer[0]==$1$X$1$){break;}}if(!WriteFile(hfile,buffer,rcb,&wcb,NULL)){break;}count=count+rcb; DWORD dw2=GetTickCount(); dwsize=dwsize+rcb; if(dw2-dw>1000){dwrapid=dwsize/(dw2-dw); dwsize=0; dw=dw2; printf("recv: %d bytes, rapid: %d kb/s \r",count,dwrapid); }}CloseHandle(hfile); vtcp_closesocket(s); printf("\r\n"); printf("download ok ( %d bytes )!!!\r\n",count); printf("\r\n"); return0;} int main(int argc,char* argv[]){ vtcp_startup(); if(argc==3)if(!lstrcmpi(argv[1],"-s")){TS(atoi(argv[2])); }if(argc==5)if(!lstrcmpi(argv[1],"-c")){TC(argv[2],atoi(argv[3]),argv[4]); }vtcp_cleanup(); printf("quit...\r\n"); return0;} |