tcp和udp多线程的epoll服务器+客户端源代码

程序是从网上的一个epoll例子修改而来的

epoll tcp服务端 epoll_server.c:

/*

gcc -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I${ORACLE_HOME}/rdbms/public -I${ORACLE_HOME}/rdbms/demo -L${ORACLE_HOME}/lib -lclntsh -pthread -o epoll_server epoll_server.c

*/

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include <string.h>

#include <sys/types.h>

#include <netinet/in.h>

#include <sys/socket.h>

#include <sys/wait.h>

#include <unistd.h>

#include <arpa/inet.h>

//#include <openssl/engines/ssl.h>

//#include <openssl/err.h>

#include <fcntl.h>

#include <sys/epoll.h>

#include <sys/time.h>

#include <sys/resource.h>

//#include "oci_api.h"

#define MAXBUF 1024

#define MAXEPOLLSIZE 10000

/*

setnonblocking - 设置句柄为非阻塞方式

*/

int setnonblocking(int sockfd)

{

if (fcntl(sockfd, F_SETFL, fcntl(sockfd, F_GETFD, 0)|O_NONBLOCK) == -1) {

return -1;

}

return 0;

}

/*

handle_message - 处理每个 socket 上的消息收发

*/

int handle_message(int new_fd)

{

char buf[MAXBUF + 1];

char sendbuf[MAXBUF+1];

int len;

/* 开始处理每个新连接上的数据收发 */

bzero(buf, MAXBUF + 1);

/* 接收客户端的消息 */

len = recv(new_fd, buf, MAXBUF, 0);

if (len > 0){

printf

("%d接收消息成功:'%s'，共%d个字节的数据/n",

new_fd, buf, len);

/*

char *s1="insert";

char *s2="select";

char *s3="delete";

if(!strncmp(s1,buf,6))

oci_insert(buf,sendbuf);

else if(!strncmp(s2,buf,6))

oci_select(buf,sendbuf);

else if(!strncmp(s3,buf,6))

oci_delete(buf,sendbuf);

else

sprintf(sendbuf,"input sql is error!/n");

len=send(new_fd,sendbuf,strlen(sendbuf),0);

if(len<0)

printf("消息发送失败！错误代码是%d，错误信息是'%s'/n",

errno, strerror(errno));

*/

}

else {

if (len < 0)

printf

("消息接收失败！错误代码是%d，错误信息是'%s'/n",

errno, strerror(errno));

else

printf

("客户端%d退出!/n",new_fd);

//close(new_fd);

return -1;

}

/* 处理每个新连接上的数据收发结束 */

return len;

}

/************关于本文档********************************************

*filename: epoll-server.c

*purpose: 演示epoll处理海量socket连接的方法

*wrote by: zhoulifa(zhoulifa@163.com) 周立发(http://zhoulifa.bokee.com)

Linux爱好者 Linux知识传播者 SOHO族 开发者 最擅长C语言

*date time:2007-01-31 21:00

*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:Google

*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

* 科技站在巨人的肩膀上进步更快！感谢有开源前辈的贡献！

*********************************************************************/

int main(int argc, char **argv)

{

int listener, new_fd, nfds, n, ret;

struct epoll_event ev;

int kdpfd, curfds;

socklen_t len;

struct sockaddr_in my_addr, their_addr;

unsigned int myport, lisnum;

struct epoll_event events[MAXEPOLLSIZE];

struct rlimit rt;

if (argc>1)

myport = atoi(argv[1]);

else

myport = 1234;

if (argc>2)

lisnum = atoi(argv[2]);

else

lisnum = 10;

/* 设置每个进程允许打开的最大文件数 */

rt.rlim_max = rt.rlim_cur = MAXEPOLLSIZE;

if (setrlimit(RLIMIT_NOFILE, &rt) == -1) {

perror("setrlimit");

exit(1);

}

else printf("设置系统资源参数成功！/n");

/* 开启 socket 监听 */

if ((listener = socket(PF_INET, SOCK_STREAM, 0)) == -1) {

perror("socket");

exit(1);

} else

printf("socket 创建成功！/n");

/*设置socket属性，端口可以重用*/

int opt=SO_REUSEADDR;

setsockopt(listener,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));

/*设置socket为非阻塞模式*/

setnonblocking(listener);

bzero(&my_addr, sizeof(my_addr));

my_addr.sin_family = PF_INET;

my_addr.sin_port = htons(myport);

if (argc>3)

my_addr.sin_addr.s_addr = inet_addr(argv[3]);

else

my_addr.sin_addr.s_addr = INADDR_ANY;

if (bind

(listener, (struct sockaddr *) &my_addr, sizeof(struct sockaddr))

== -1) {

perror("bind");

exit(1);

} else

printf("IP 地址和端口绑定成功/n");

if (listen(listener, lisnum) == -1) {

perror("listen");

exit(1);

} else

printf("开启服务成功！/n");

/* 创建 epoll 句柄，把监听 socket 加入到 epoll 集合里 */

kdpfd = epoll_create(MAXEPOLLSIZE);

len = sizeof(struct sockaddr_in);

ev.events = EPOLLIN | EPOLLET;

ev.data.fd = listener;

if (epoll_ctl(kdpfd, EPOLL_CTL_ADD, listener, &ev) < 0) {

fprintf(stderr, "epoll set insertion error: fd=%d/n", listener);

return -1;

} else

printf("监听 socket 加入 epoll 成功！/n");

curfds = 1;

while (1) {

/* 等待有事件发生 */

nfds = epoll_wait(kdpfd, events, curfds, -1);

if (nfds == -1) {

perror("epoll_wait");

break;

}

/* 处理所有事件 */

for (n = 0; n < nfds; ++n) {

if (events
.data.fd == listener) {

new_fd = accept(listener, (struct sockaddr *) &their_addr,

&len);

if (new_fd < 0) {

perror("accept");

continue;

} else

printf("有连接来自于： %s:%d， 分配的 socket 为:%d/n", inet_ntoa(their_addr.sin_addr), ntohs(their_addr.sin_port), new_fd);

setnonblocking(new_fd);

ev.events = EPOLLIN | EPOLLET;

ev.data.fd = new_fd;

if (epoll_ctl(kdpfd, EPOLL_CTL_ADD, new_fd, &ev) < 0) {

fprintf(stderr, "把 socket '%d' 加入 epoll 失败！%s/n",

new_fd, strerror(errno));

return -1;

}

curfds++;

} else {

ret = handle_message(events
.data.fd);

if (ret < 1 && errno != 11) {

if(epoll_ctl(kdpfd, EPOLL_CTL_DEL, events
.data.fd,

&ev) < 0)

{

fprintf(stderr, "把 socket '%d' 从 epoll 删除失败！%s/n",

events
.data.fd, strerror(errno));

}

curfds--;

close(events
.data.fd);

}

}

}

}

close(listener);

return 0;

}

tcp客户端client.c:

#include <sys/types.h>

#include <sys/socket.h>

#include <stdio.h>

#include <unistd.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <errno.h>

#include <sys/select.h>

#include <stdlib.h>

#include <string.h>

#include <fcntl.h>

#define MAXLINE 1024

char sendhead[MAXLINE];

int main(int argc , char* argv[])

{

int sockfd;

struct sockaddr_in servaddr;

char *info="cxt";

int maxfdp1, stdineof;

fd_set rset;

char recvbuf[MAXLINE],tmp[128],sendbuf[MAXLINE];

int n,len,fd;

if(argc!=3){

printf("useage:client address port ");

exit(0);

}

if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1 )

{

perror("socket");

exit(1);

}

printf("%s connect server/n",info);

bzero(&servaddr,sizeof(servaddr));

servaddr.sin_family=AF_INET;

servaddr.sin_port=htons(atoi(argv[2]));

inet_pton(AF_INET,argv[1],&servaddr.sin_addr);

if( ( connect(sockfd,(struct sockaddr*)&servaddr,sizeof(servaddr)) )<0)

{

perror("connect");

exit(1);

}

send(sockfd,info,strlen(info),0);

//FD_ZERO(&rset);

//FD_SET(sockfd, &rset);

//FD_SET(0, &rset);

//maxfdp1=sockfd+1;

for ( ; ; ) {

FD_ZERO(&rset);

FD_SET(sockfd, &rset);

FD_SET(0, &rset);

maxfdp1=sockfd+1;

if( ( select(maxfdp1, &rset, NULL, NULL, NULL) )<=0){

perror("select");

}else{

if (FD_ISSET(0,&rset)){

fgets(sendbuf, MAXLINE, stdin);

n=send(sockfd,sendbuf,strlen(sendbuf)-1,0);

if(n>0)

printf("send: %s",sendbuf);

else

printf("send: %s error,the erro cause is %s:%s/n",sendbuf,errno,strerror(errno));

bzero(sendbuf,strlen(sendbuf));

}

if (FD_ISSET(sockfd, &rset)) { /* socket is readable */

n=recv(sockfd, recvbuf, MAXLINE,0) ;

if(n<0) {

perror("str_cli: server terminated prematurely");

}else if(n==0)

{

printf("sever shutdown!");

exit(-1);

}

//recvbuf

recvbuf
='/0';

printf("receive :%s/n",recvbuf);

fflush(stdout);

bzero(recvbuf,strlen(recvbuf));

}

}

}

exit(0);

}

udp +epoll+多线程服务器 udp_epoll_server.c:

/*

gcc -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I${ORACLE_HOME}/rdbms/public -I${ORACLE_HOME}/rdbms/demo -L${ORACLE_HOME}/lib -lclntsh -pthread -o udp_epoll_server udp_epoll_server.c -lpthread

*/

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include <string.h>

#include <sys/types.h>

#include <netinet/in.h>

#include <sys/socket.h>

#include <sys/wait.h>

#include <unistd.h>

#include <arpa/inet.h>

//#include <openssl/ssl.h>

//#include <openssl/err.h>

#include <fcntl.h>

#include <sys/epoll.h>

#include <sys/time.h>

#include <sys/resource.h>

#include <pthread.h>

#include <assert.h>

//#include "oci_api.h"

#define MAXBUF 1024

#define MAXEPOLLSIZE 100

/*

setnonblocking – 设置句柄为非阻塞方式

*/

int setnonblocking(int sockfd)

{

if (fcntl(sockfd, F_SETFL, fcntl(sockfd, F_GETFD, 0)|O_NONBLOCK) == -1)

{

return -1;

}

return 0;

}

/*

pthread_handle_message – 线程处理 socket 上的消息收发

*/

void* pthread_handle_message(int* sock_fd)

{

char recvbuf[MAXBUF + 1];

char sendbuf[MAXBUF+1];

int ret;

int new_fd;

struct sockaddr_in client_addr;

socklen_t cli_len=sizeof(client_addr);

new_fd=*sock_fd;

/* 开始处理每个新连接上的数据收发 */

bzero(recvbuf, MAXBUF + 1);

bzero(sendbuf, MAXBUF + 1);

/* 接收客户端的消息 */

ret = recvfrom(new_fd, recvbuf, MAXBUF, 0, (struct sockaddr *)&client_addr, &cli_len);

if (ret > 0)

{

printf("socket %d 接收到来自:%s:%d的消息成功:’%s’，共%d个字节的数据/n",

new_fd, inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port), recvbuf, ret);

/* char *s1="insert";

char *s2="select";

char *s3="delete";

if(!strncmp(s1,recvbuf,6))

oci_insert(recvbuf,sendbuf);

else if(!strncmp(s2,recvbuf,6))

oci_select(recvbuf,sendbuf);

else if(!strncmp(s3,recvbuf,6))

oci_delete(recvbuf,sendbuf);

else

sprintf(sendbuf,"input sql is error!/n");

ret = sendto(new_fd, sendbuf, strlen(sendbuf), 0, (struct sockaddr *)&client_addr, cli_len);

if(ret<0)

printf("消息发送失败！错误代码是%d，错误信息是'%s'/n",

errno, strerror(errno));

*/

}

else

{

printf("消息接收失败！错误代码是%d，错误信息是’%s’/n",

errno, strerror(errno));

}

/* 处理每个新连接上的数据收发结束 */

//printf("pthread exit!");

fflush(stdout);

pthread_exit(NULL);

}

int main(int argc, char **argv)

{

int listener, kdpfd, nfds, n, curfds;

socklen_t len;

struct sockaddr_in my_addr, their_addr;

unsigned int myport;

struct epoll_event ev;

struct epoll_event events[MAXEPOLLSIZE];

struct rlimit rt;

myport = 1234;

pthread_t thread;

pthread_attr_t attr;

/* 设置每个进程允许打开的最大文件数 */

rt.rlim_max = rt.rlim_cur = MAXEPOLLSIZE;

if (setrlimit(RLIMIT_NOFILE, &rt) == -1)

{

perror("setrlimit");

exit(1);

}

else

{

printf("设置系统资源参数成功！/n");

}

/* 开启 socket 监听 */

if ((listener = socket(PF_INET, SOCK_DGRAM, 0)) == -1)

{

perror("socket 创建失败！");

exit(1);

}

else

{

printf("socket 创建成功！/n");

}

/*设置socket属性，端口可以重用*/

int opt=SO_REUSEADDR;

setsockopt(listener,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));

setnonblocking(listener);

bzero(&my_addr, sizeof(my_addr));

my_addr.sin_family = PF_INET;

my_addr.sin_port = htons(myport);

my_addr.sin_addr.s_addr = INADDR_ANY;

if (bind(listener, (struct sockaddr *) &my_addr, sizeof(struct sockaddr)) == -1)

{

perror("bind");

exit(1);

}

else

{

printf("IP 地址和端口绑定成功/n");

}

/* 创建 epoll 句柄，把监听 socket 加入到 epoll 集合里 */

kdpfd = epoll_create(MAXEPOLLSIZE);

len = sizeof(struct sockaddr_in);

ev.events = EPOLLIN | EPOLLET;

ev.data.fd = listener;

if (epoll_ctl(kdpfd, EPOLL_CTL_ADD, listener, &ev) < 0)

{

fprintf(stderr, "epoll set insertion error: fd=%d/n", listener);

return -1;

}

else

{

printf("监听 socket 加入 epoll 成功！/n");

}

while (1)

{

/* 等待有事件发生 */

nfds = epoll_wait(kdpfd, events, 10000, -1);

if (nfds == -1)

{

perror("epoll_wait");

break;

}

/* 处理所有事件 */

for (n = 0; n < nfds; ++n)

{

if (events
.data.fd == listener)

{

/*初始化属性值，均设为默认值*/

pthread_attr_init(&attr);

pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);

/* 设置线程为分离属性*/

pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);

if(pthread_create(&thread,&attr,(void*)pthread_handle_message,(void*)&(events
.data.fd)))

{

perror("pthread_creat error!");

exit(-1);

}

}

}

}

close(listener);

return 0;

}

udp客户端 udp_client.c:

#include <sys/types.h>

#include <sys/socket.h>

#include <string.h>

#include <netinet/in.h>

#include <stdio.h>

#include <stdlib.h>

#include <arpa/inet.h>

#include <unistd.h>

#define MAXLINE 1024

#define SERV_PORT 1234

void do_cli(FILE *fp, int sockfd, struct sockaddr *pservaddr, socklen_t servlen)

{

int n;

char sendline[MAXLINE], recvline[MAXLINE + 1];

/* connect to server */

if(connect(sockfd, (struct sockaddr *)pservaddr, servlen) == -1)

{

perror("connect error");

exit(1);

}

while(fgets(sendline, MAXLINE, fp) != NULL)

{

/* read a line and send to server */

write(sockfd, sendline, strlen(sendline)-1);

/* receive data from server */

n = read(sockfd, recvline, MAXLINE);

if(n == -1)

{

perror("read error");

exit(1);

}

recvline
= '/0'; /* terminate string */

//fputs(recvline, stdout);

printf("receive:%s/n",recvline);

fflush(stdout);

}

}

int main(int argc, char **argv)

{

int sockfd;

struct sockaddr_in servaddr;

/* check args */

if(argc != 2)

{

printf("usage: udpclient <IPaddress>/n");

exit(1);

}

/* init servaddr */

bzero(&servaddr, sizeof(servaddr));

servaddr.sin_family = AF_INET;

servaddr.sin_port = htons(SERV_PORT);

if(inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)

{

printf("[%s] is not a valid IPaddress/n", argv[1]);

exit(1);

}

sockfd = socket(AF_INET, SOCK_DGRAM, 0);

do_cli(stdin, sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));

return 0;

}