Linux常用开发服务器的代码[Linux zhoulifa ]-白红宇

经常用到的几个自定义函数：

1、开启监听的函数

http://linux.chinaunix.net/bbs/viewthread.php?tid=786283&extra=

************************关于本函数************************************

*function_name: OpenSCPServer

*参数说明：port整数型监听端口号，total整数型监听个数，sendbuflen整数型发送缓冲区大小

* recvbuflen整数型接收缓冲区大小，blockORnot整数型是否阻塞，reuseORnot整数型是否端口重用

*purpose: 用来建立一个tcp服务端socket

*tidied by: zhoulifa(zhoulifa@163.com) 周立发(

http://zhoulifa.9999mb.com

)

Linux爱好者 Linux知识传播者 SOHO族开发者最擅长C语言

*date time:2006-07-05 20:00:00

*Note: 任何人可以任意复制代码并运用这些文档，当然包括你的商业用途

* 但请遵循GPL

*Thanks to: Paul Sheer 感谢Paul Sheer在select_tut的man手册里提供了这份源代码

*Hope:希望越来越多的人贡献自己的力量，为科学技术发展出力

*Note:要使用此函数需要自定义一个全局变量char errorMessage[1024];并包含GetCurrentTime.h头文件

********************************************************************

int

OpenSCPServer(

int port,

int total,

int sendbuflen,

int recvbuflen,

int blockORnot,

int reuseORnot) {

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;

}

************************关于本函数************************************

*function_name: OpenSCPServer

*参数说明：port整数型监听端口号，total整数型监听个数，sendbuflen整数型发送缓冲区大小

* recvbuflen整数型接收缓冲区大小，blockORnot整数型是否阻塞，reuseORnot整数型是否端口重用

*purpose: 用来建立一个tcp服务端socket

*tidied by: zhoulifa(zhoulifa@163.com) 周立发(

http://zhoulifa.9999mb.com

)

Linux爱好者 Linux知识传播者 SOHO族开发者最擅长C语言

*date time:2006-07-05 20:00:00

*Note: 任何人可以任意复制代码并运用这些文档，当然包括你的商业用途

* 但请遵循GPL

*Thanks to: Paul Sheer 感谢Paul Sheer在select_tut的man手册里提供了这份源代码

*Hope:希望越来越多的人贡献自己的力量，为科学技术发展出力

*Note:要使用此函数需要自定义一个全局变量char errorMessage[1024];并包含GetCurrentTime.h头文件

********************************************************************

int

OpenSCPServer(

int port,

int total,

int sendbuflen,

int recvbuflen,

int blockORnot,

int reuseORnot) {

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;

}

2、连接服务器的函数

************************关于本函数************************************

*function_name: ConnectSCPServer

*参数说明：serverip服务器IP地址或主机名，serverport服务器端口，blockORnot整数型是否阻塞

*purpose: 用来建立一个tcp客户端socket

*tidied by: zhoulifa(zhoulifa@163.com) 周立发(

http://zhoulifa.9999mb.com

)

Linux爱好者 Linux知识传播者 SOHO族开发者最擅长C语言

*date time:2006-07-05 20:40:00

*Note: 任何人可以任意复制代码并运用这些文档，当然包括你的商业用途

* 但请遵循GPL

*Thanks to: Paul Sheer 感谢Paul Sheer在select_tut的man手册里提供了这份源代码

*Hope:希望越来越多的人贡献自己的力量，为科学技术发展出力

*Note:要使用此函数需要自定义一个全局变量char errorMessage[1024];并包含自己编写的GetCurrentTime.h头文件

********************************************************************

int

ConnectSCPServer(

char * serverip,

int serverport,

int blockORnot) {

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;

}

************************关于本函数************************************

*function_name: ConnectSCPServer

*参数说明：serverip服务器IP地址或主机名，serverport服务器端口，blockORnot整数型是否阻塞

*purpose: 用来建立一个tcp客户端socket

*tidied by: zhoulifa(zhoulifa@163.com) 周立发(

http://zhoulifa.9999mb.com

)

Linux爱好者 Linux知识传播者 SOHO族开发者最擅长C语言

*date time:2006-07-05 20:40:00

*Note: 任何人可以任意复制代码并运用这些文档，当然包括你的商业用途

* 但请遵循GPL

*Thanks to: Paul Sheer 感谢Paul Sheer在select_tut的man手册里提供了这份源代码

*Hope:希望越来越多的人贡献自己的力量，为科学技术发展出力

*Note:要使用此函数需要自定义一个全局变量char errorMessage[1024];并包含自己编写的GetCurrentTime.h头文件

********************************************************************

int

ConnectSCPServer(

char * serverip,

int serverport,

int blockORnot) {

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;

}

3、发送数据函数Send

************************关于本函数************************************

*function_name: Send

*参数说明：sock整数型socket，buf待发送的内容，size要发送的大小，flag发送选项，timeout超时时间值

*purpose: 用来通过一个socket在指定时间内发送数据

*tidied by: zhoulifa(zhoulifa@163.com) 周立发(

http://zhoulifa.9999mb.com

)

Linux爱好者 Linux知识传播者 SOHO族开发者最擅长C语言

*date time:2006-07-05 20:58:00

*Note: 任何人可以任意复制代码并运用这些文档，当然包括你的商业用途

* 但请遵循GPL

*Thanks to: Paul Sheer 感谢Paul Sheer在select_tut的man手册里提供了这份源代码

*Hope:希望越来越多的人贡献自己的力量，为科学技术发展出力

*Note:要使用此函数需要自定义一个全局变量char errorMessage[1024];并包含自己编写的GetCurrentTime.h头文件

********************************************************************

int

Send(

int sock,

char * buf, size_t size,

int flag,

int timeout) {

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;

}

************************关于本函数************************************

*function_name: Send

*参数说明：sock整数型socket，buf待发送的内容，size要发送的大小，flag发送选项，timeout超时时间值

*purpose: 用来通过一个socket在指定时间内发送数据

*tidied by: zhoulifa(zhoulifa@163.com) 周立发(

http://zhoulifa.9999mb.com

)

Linux爱好者 Linux知识传播者 SOHO族开发者最擅长C语言

*date time:2006-07-05 20:58:00

*Note: 任何人可以任意复制代码并运用这些文档，当然包括你的商业用途

* 但请遵循GPL

*Thanks to: Paul Sheer 感谢Paul Sheer在select_tut的man手册里提供了这份源代码

*Hope:希望越来越多的人贡献自己的力量，为科学技术发展出力

*Note:要使用此函数需要自定义一个全局变量char errorMessage[1024];并包含自己编写的GetCurrentTime.h头文件

********************************************************************

int

Send(

int sock,

char * buf, size_t size,

int flag,

int timeout)

{

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;

}

接收数据函数Recv

************************关于本函数************************************

*function_name: Recv

*参数说明：sock整数型socket，buf接收数据的缓冲区，size要接收数据的大小，flag接收选项，timeout超时时间值

*purpose: 用来从一个socket在指定时间内读取数据

*tidied by: zhoulifa(zhoulifa@163.com) 周立发(

http://zhoulifa.9999mb.com

)

Linux爱好者 Linux知识传播者 SOHO族开发者最擅长C语言

*date time:2006-07-05 21:10:00

*Note: 任何人可以任意复制代码并运用这些文档，当然包括你的商业用途

* 但请遵循GPL

*Thanks to: Paul Sheer 感谢Paul Sheer在select_tut的man手册里提供了这份源代码

*Hope:希望越来越多的人贡献自己的力量，为科学技术发展出力

*Note:要使用此函数需要自定义一个全局变量char errorMessage[1024];并包含自己编写的GetCurrentTime.h头文件

********************************************************************

int

Recv(

int sock,

char * buf, size_t size,

int flag,

int timeout)

{

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;

}