1、開啓監聽的函數
http://linux.chinaunix.net/bbs/viewthread.php?tid=786283&extra=
- /*----------------------源代碼代碼開始--------------------------------------------*/
- int
- OpenSCPServer(int port, int total, int sendbuflen, int recvbuflen, int blockORnot, int reuseORnot) {
- /*************************關於本函數************************************
- *function_name: OpenSCPServer
- *參數說明:port整數型監聽端口號,total整數型監聽個數,sendbuflen整數型發送緩衝區大小
- * recvbuflen整數型接收緩衝區大小,blockORnot整數型是否阻塞,reuseORnot整數型是否端口重用
- *purpose: 用來建立一個tcp服務端socket
- *tidied by: zhoulifa([email protected]) 周立發(http://zhoulifa.9999mb.com)
- Linux愛好者 Linux知識傳播者 SOHO族 開發者 最擅長C語言
- *date time:2006-07-05 20:00:00
- *Note: 任何人可以任意複製代碼並運用這些文檔,當然包括你的商業用途
- * 但請遵循GPL
- *Thanks to: Paul Sheer 感謝Paul Sheer在select_tut的man手冊裏提供了這份源代碼
- *Hope:希望越來越多的人貢獻自己的力量,爲科學技術發展出力
- *Note:要使用此函數需要自定義一個全局變量char errorMessage[1024];幷包含GetCurrentTime.h頭文件
- *********************************************************************/
- int sockfd = 0, ret = 0, opt = 0, flags=1;
- struct sockaddr_in laddr;
- ret = sockfd = socket(PF_INET, SOCK_STREAM, 0);
- if(ret < 0) {
- sprintf(errorMessage, "OpenTCPServer socket() error! return:%d, errno=%d, errortext:'%s' %s", ret, errno, strerror(errno), GetCurrentTime(0, 0));
- return -1;
- }
- ret = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &reuseORnot, sizeof(int));
- if(ret < 0) {
- sprintf(errorMessage, "OpenTCPServer setsockopt() reuse error! return:%d, errno=%d, errortext:'%s' %s", ret, errno, strerror(errno), GetCurrentTime(0, 0));
- return -2;
- }
- ret = setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &recvbuflen, sizeof(int));
- if ( ret < 0) {
- sprintf(errorMessage, "OpenTCPServer setsockopt() recvbuf error! return:%d, errno=%d, errortext:'%s' %s", ret, errno, strerror(errno), GetCurrentTime(0, 0));
- return -3;
- }
- ret = setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &sendbuflen, sizeof(int));
- if (ret < 0) {
- sprintf(errorMessage, "OpenTCPServer setsockopt() sendbuf error! return:%d, errno=%d, errortext:'%s' %s", ret, errno, strerror(errno), GetCurrentTime(0, 0));
- return -4;
- }
- ioctl(sockfd,FIONBIO,&blockORnot);/*block or not*/
- laddr.sin_family = PF_INET;
- laddr.sin_port = htons(port);
- laddr.sin_addr.s_addr = INADDR_ANY;
- bzero(&(laddr.sin_zero), 8);
- ret = bind(sockfd, (struct sockaddr *)&laddr, sizeof(struct sockaddr));
- if(ret < 0) {
- sprintf(errorMessage, "OpenTCPServer bind() error! return:%d, errno=%d, errortext:'%s' %s", ret, errno, strerror(errno), GetCurrentTime(0, 0));
- close(sockfd);
- return -5;
- }
- ret = listen(sockfd, total);
- if(ret < 0) {
- sprintf(errorMessage, "OpenTCPServer listen() error! return:%d, errno=%d, errortext:'%s' %s", ret, errno, strerror(errno), GetCurrentTime(0, 0));
- close(sockfd);
- return -6;
- }
- sprintf(errorMessage, "OpenTCPServer opened on port.%d(%d) OK, socket(%d), buf(%d:%d)! %s", port, total, sockfd, sendbuflen, recvbuflen, GetCurrentTime(0, 0));
- return sockfd;
- }
- /*----------------------源代碼代碼結束--------------------------------------------*/
2、連接服務器的函數
- /*----------------------源代碼代碼開始--------------------------------------------*/
- int
- ConnectSCPServer(char * serverip, int serverport, int blockORnot) {
- /*************************關於本函數************************************
- *function_name: ConnectSCPServer
- *參數說明:serverip服務器IP地址或主機名,serverport服務器端口,blockORnot整數型是否阻塞
- *purpose: 用來建立一個tcp客戶端socket
- *tidied by: zhoulifa([email protected]) 周立發(http://zhoulifa.9999mb.com)
- Linux愛好者 Linux知識傳播者 SOHO族 開發者 最擅長C語言
- *date time:2006-07-05 20:40:00
- *Note: 任何人可以任意複製代碼並運用這些文檔,當然包括你的商業用途
- * 但請遵循GPL
- *Thanks to: Paul Sheer 感謝Paul Sheer在select_tut的man手冊裏提供了這份源代碼
- *Hope:希望越來越多的人貢獻自己的力量,爲科學技術發展出力
- *Note:要使用此函數需要自定義一個全局變量char errorMessage[1024];幷包含自己編寫的GetCurrentTime.h頭文件
- *********************************************************************/
- int serversock = 0, ret = 0;
- unsigned long addr;
- struct sockaddr_in sin;
- struct hostent *he;
- if((he=gethostbyname(serverip))== 0) {
- sprintf(errorMessage, "ConnectSCPServer IP address '%s' error! return:-1 %s", serverip, GetCurrentTime(0, 0));
- return -1;
- }
- serversock = socket(PF_INET, SOCK_STREAM, 0);
- if(serversock == -1) {
- sprintf(errorMessage, "ConnectSCPServer socket() error! return:-2, errno=%d, errortext:'%s' %s", errno, strerror(errno), GetCurrentTime(0, 0));
- return -2;
- }
- ioctl(serversock, FIONBIO, &blockORnot); //block or not
- memset((char*)&sin, 0, sizeof(struct sockaddr_in));
- sin.sin_family = PF_INET;
- sin.sin_port = htons(serverport);
- sin.sin_addr = *((struct in_addr *)he->h_addr);
- ret = connect(serversock, (struct sockaddr *)&sin, sizeof(sin));
- if(ret == -1) {
- sprintf(errorMessage, "ConnectSCPServer connect() error! return:-3, errno=%d, errortext:'%s' %s", errno, strerror(errno), GetCurrentTime(0, 0));
- close(serversock);
- return -3;
- }
- return serversock;
- }
- /*----------------------源代碼代碼結束--------------------------------------------*/
3、發送數據函數Send
- /*----------------------源代碼代碼開始--------------------------------------------*/
- int
- Send(int sock, char * buf, size_t size, int flag, int timeout) {
- /*************************關於本函數************************************
- *function_name: Send
- *參數說明:sock整數型socket,buf待發送的內容,size要發送的大小,flag發送選項,timeout超時時間值
- *purpose: 用來通過一個socket在指定時間內發送數據
- *tidied by: zhoulifa([email protected]) 周立發(http://zhoulifa.9999mb.com)
- Linux愛好者 Linux知識傳播者 SOHO族 開發者 最擅長C語言
- *date time:2006-07-05 20:58:00
- *Note: 任何人可以任意複製代碼並運用這些文檔,當然包括你的商業用途
- * 但請遵循GPL
- *Thanks to: Paul Sheer 感謝Paul Sheer在select_tut的man手冊裏提供了這份源代碼
- *Hope:希望越來越多的人貢獻自己的力量,爲科學技術發展出力
- *Note:要使用此函數需要自定義一個全局變量char errorMessage[1024];幷包含自己編寫的GetCurrentTime.h頭文件
- *********************************************************************/
- int i = 0, ret = 0, intretry = 0;
- struct timeval tival;
- fd_set writefds;
- int maxfds = 0;
- tival.tv_sec = timeout;
- tival.tv_usec = 0;
- FD_ZERO(&writefds);
- if(sock > 0) {
- FD_SET(sock, &writefds);
- maxfds=((sock > maxfds)?sock:maxfds);
- }
- else {
- sprintf(errorMessage, "Send socket:%d error! return:-2 %s", sock, GetCurrentTime(0, 0));
- return -2;
- }
- ret = select(maxfds + 1, NULL, &writefds, NULL, &tival);
- if(ret <= 0) {
- if(ret < 0) sprintf(errorMessage, "Send socket:%d select() error! return:%d, errno=%d, errortext:'%s' %s", sock, ret, errno, strerror(errno), GetCurrentTime(0, 0));
- else sprintf(errorMessage, "Send socket:%d select timeout(%d)! %s", sock, timeout, GetCurrentTime(0, 0));
- close(sock);
- return -3;
- }
- if(!(FD_ISSET(sock, &writefds))) {
- sprintf(errorMessage, "Send socket:%d not in writefds! %s", sock, GetCurrentTime(0, 0));
- close(sock);
- return -4;
- }
- while(i < size) {
- ret = send(sock, buf + i, size - i, flag);
- if(ret <= 0) {
- sprintf(errorMessage, "Send socket:%d send() error! return:%d, errno=%d, errortext:'%s' %s", sock, ret, errno, strerror(errno), GetCurrentTime(0, 0));
- if (EINTR == errno)
- if(intretry < 10) {intretry++;continue;}
- else sprintf(errorMessage, "Send socket:%d send() error!EINTR 10 times! %s", sock, GetCurrentTime(0, 0));
- close(sock);
- return -1;
- }
- else i += ret;
- }
- sprintf(errorMessage, "Send socket:%d send() OK! %d/%d bytes sent! %s", sock, i, size, GetCurrentTime(0, 0));
- return i;
- }
- /*----------------------源代碼代碼結束--------------------------------------------*/
接收數據函數Recv
- /*----------------------源代碼代碼開始--------------------------------------------*/
- int
- Recv(int sock, char * buf, size_t size, int flag, int timeout) {
- /*************************關於本函數************************************
- *function_name: Recv
- *參數說明:sock整數型socket,buf接收數據的緩衝區,size要接收數據的大小,flag接收選項,timeout超時時間值
- *purpose: 用來從一個socket在指定時間內讀取數據
- *tidied by: zhoulifa([email protected]) 周立發(http://zhoulifa.9999mb.com)
- Linux愛好者 Linux知識傳播者 SOHO族 開發者 最擅長C語言
- *date time:2006-07-05 21:10:00
- *Note: 任何人可以任意複製代碼並運用這些文檔,當然包括你的商業用途
- * 但請遵循GPL
- *Thanks to: Paul Sheer 感謝Paul Sheer在select_tut的man手冊裏提供了這份源代碼
- *Hope:希望越來越多的人貢獻自己的力量,爲科學技術發展出力
- *Note:要使用此函數需要自定義一個全局變量char errorMessage[1024];幷包含自己編寫的GetCurrentTime.h頭文件
- *********************************************************************/
- int i = 0, ret = 0, intretry = 0;
- struct timeval tival;
- fd_set readfds;
- int maxfds = 0;
- tival.tv_sec = timeout;
- tival.tv_usec = 0;
- FD_ZERO(&readfds);
- if(sock > 0) {
- FD_SET(sock, &readfds);
- maxfds=((sock > maxfds)?sock:maxfds);
- }
- else {
- sprintf(errorMessage, "Recv socket:%d error! return:-2 %s", sock, GetCurrentTime(0, 0));
- return -2;
- }
- ret = select(maxfds + 1, &readfds, NULL, NULL, &tival);
- if(ret <= 0) {
- if(ret < 0) sprintf(errorMessage, "Recv socket:%d select() error! return:%d, errno=%d, errortext:'%s' %s", sock, ret, errno, strerror(errno), GetCurrentTime(0, 0));
- else sprintf(errorMessage, "Recv socket:%d select timeout(%d)! %s", sock, timeout, GetCurrentTime(0, 0));
- close(sock);
- return -3;
- }
- if(!(FD_ISSET(sock, &readfds))) {
- sprintf(errorMessage, "Recv socket:%d not in readfds! %s", sock, GetCurrentTime(0, 0));
- close(sock);
- return -4;
- }
- while(i < size) {
- ret = recv(sock, buf + i, size - i, flag);
- if(ret <= 0){
- sprintf(errorMessage, "Recv socket:%d recv() error! return:%d, errno=%d, errortext:'%s' %s", sock, ret, errno, strerror(errno), GetCurrentTime(0, 0));
- if(errno == EINTR)
- if(intretry < 10) {intretry++;continue;}
- else sprintf(errorMessage, "Recv socket:%d recv() error! EINTR 10 times! %s", sock, GetCurrentTime(0, 0));
- close(sock);
- return -1;
- }
- else i += ret;
- }
- sprintf(errorMessage, "Recv socket:%d recv() OK! %d/%d bytes received! %s", sock, i, size, GetCurrentTime(0, 0));
- return i;
- }
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