tcp和udp多線程的epoll服務器+客戶端源代碼

程序是從網上的一個epoll例子修改而來的

 

epoll tcp服務端 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 - 設置句柄爲非阻塞方式
*/
int setnonblocking(int sockfd)
{
    if (fcntl(sockfd, F_SETFL, fcntl(sockfd, F_GETFD, 0)|O_NONBLOCK) == -1) {
        return -1;
    }
    return 0;
}

/*
handle_message - 處理每一個 socket 上的消息收發
*/
int handle_message(int new_fd)
{
    char buf[MAXBUF + 1];
    char sendbuf[MAXBUF+1];
    int len;
    /* 開始處理每一個新鏈接上的數據收發 */
    bzero(buf, MAXBUF + 1);
    /* 接收客戶端的消息 */
    len = recv(new_fd, buf, MAXBUF, 0);
    if (len > 0){

        printf
            ("%d接收消息成功:'%s'，共%d個字節的數據/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("消息發送失敗！錯誤代碼是%d，錯誤信息是'%s'/n",

                      errno, strerror(errno));

  */
    }
    else {
        if (len < 0)
            printf
                ("消息接收失敗！錯誤代碼是%d，錯誤信息是'%s'/n",
                 errno, strerror(errno));
 else
    printf
  ("客戶端%d退出!/n",new_fd);
        //close(new_fd);
        return -1;
    }
    /* 處理每一個新鏈接上的數據收發結束 */
    return len;
}
/************關於本文檔********************************************
*filename: epoll-server.c
*purpose: 演示epoll處理海量socket鏈接的方法
*wrote by: zhoulifa(zhoulifa@163.com) 周立發(http://zhoulifa.bokee.com)
Linux愛好者 Linux知識傳播者 SOHO族 開發者 最擅長C語言
*date time:2007-01-31 21:00
*Note: 任何人能夠任意複製代碼並運用這些文檔，固然包括你的商業用途
* 但請遵循GPL
*Thanks to:Google
*Hope:但願愈來愈多的人貢獻本身的力量，爲科學技術發展出力
* 科技站在巨人的肩膀上進步更快！感謝有開源前輩的貢獻！
*********************************************************************/
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;

    /* 設置每一個進程容許打開的最大文件數 */
    rt.rlim_max = rt.rlim_cur = MAXEPOLLSIZE;
    if (setrlimit(RLIMIT_NOFILE, &rt) == -1) {
        perror("setrlimit");
        exit(1);
    }
    else printf("設置系統資源參數成功！/n");

    /* 開啓 socket 監聽 */
    if ((listener = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
        perror("socket");
        exit(1);
    } else
        printf("socket 建立成功！/n");

    /*設置socket屬性，端口能夠重用*/
    int opt=SO_REUSEADDR;
    setsockopt(listener,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));

    /*設置socket爲非阻塞模式*/
    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 地址和端口綁定成功/n");

    if (listen(listener, lisnum) == -1) {
        perror("listen");
        exit(1);
    } else
        printf("開啓服務成功！/n");

    /* 建立 epoll 句柄，把監聽 socket 加入到 epoll 集合裏 */
    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("監聽 socket 加入 epoll 成功！/n");
    curfds = 1;
    while (1) {
        /* 等待有事件發生 */
        nfds = epoll_wait(kdpfd, events, curfds, -1);
        if (nfds == -1) {
            perror("epoll_wait");
            break;
        }
        /* 處理全部事件 */
        for (n = 0; n < nfds; ++n) {
            if (events[n].data.fd == listener) {
                new_fd = accept(listener, (struct sockaddr *) &their_addr,
                                &len);
                if (new_fd < 0) {
                    perror("accept");
                    continue;
                } else
                    printf("有鏈接來自於： %s:%d， 分配的 socket 爲:%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 失敗！%s/n",
                            new_fd, strerror(errno));
                    return -1;
                }
                curfds++;
            } else {
                ret = handle_message(events[n].data.fd);
                if (ret < 1 && errno != 11) {
                    if(epoll_ctl(kdpfd, EPOLL_CTL_DEL, events[n].data.fd,
                              &ev) < 0)
             {
             fprintf(stderr, "把 socket '%d' 從 epoll 刪除失敗！%s/n",
                     events[n].data.fd, strerror(errno));
             }
                    curfds--;
      close(events[n].data.fd);
                }
            }
        }
    }
    close(listener);
    return 0;
}

 

 

tcp客戶端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[n]='/0';
   printf("receive :%s/n",recvbuf);
   fflush(stdout);
   bzero(recvbuf,strlen(recvbuf));
  }
  }
 }

       exit(0);
}

 

udp +epoll+多線程服務器 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 – 設置句柄爲非阻塞方式
   */
int setnonblocking(int sockfd)
{
    if (fcntl(sockfd, F_SETFL, fcntl(sockfd, F_GETFD, 0)|O_NONBLOCK) == -1)
    {
        return -1;
    }
    return 0;
}

/*
   pthread_handle_message – 線程處理 socket 上的消息收發
   */
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; 
    /* 開始處理每一個新鏈接上的數據收發 */
    bzero(recvbuf, MAXBUF + 1);
    bzero(sendbuf, MAXBUF + 1);
    /* 接收客戶端的消息 */
    ret = recvfrom(new_fd, recvbuf, MAXBUF, 0, (struct sockaddr *)&client_addr, &cli_len);
    if (ret > 0)
    {
        printf("socket %d 接收到來自:%s:%d的消息成功:’%s’，共%d個字節的數據/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("消息發送失敗！錯誤代碼是%d，錯誤信息是'%s'/n",
                            errno, strerror(errno));
   */

    }
    else
    {
            printf("消息接收失敗！錯誤代碼是%d，錯誤信息是’%s’/n",
                 errno, strerror(errno));
       
    }
    /* 處理每一個新鏈接上的數據收發結束 */
    //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;

    /* 設置每一個進程容許打開的最大文件數 */
    rt.rlim_max = rt.rlim_cur = MAXEPOLLSIZE;
    if (setrlimit(RLIMIT_NOFILE, &rt) == -1)
    {
        perror("setrlimit");
        exit(1);
    }
    else
    {
        printf("設置系統資源參數成功！/n");
    }
    /* 開啓 socket 監聽 */
    if ((listener = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
    {
        perror("socket 建立失敗！");
        exit(1);
    }
    else
    {
        printf("socket 建立成功！/n");
    }

    /*設置socket屬性，端口能夠重用*/
    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 地址和端口綁定成功/n");
    }
   

    /* 建立 epoll 句柄，把監聽 socket 加入到 epoll 集合裏 */
    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("監聽 socket 加入 epoll 成功！/n");
    }
  
    while (1)
    {
        /* 等待有事件發生 */
        nfds = epoll_wait(kdpfd, events, 10000, -1);
        if (nfds == -1)
        {
            perror("epoll_wait");
            break;
        }
        /* 處理全部事件 */
        for (n = 0; n < nfds; ++n)
        {
            if (events[n].data.fd == listener)
            {
                /*初始化屬性值，均設爲默認值*/
                pthread_attr_init(&attr);
                pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
                /*  設置線程爲分離屬性*/
                pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);

                if(pthread_create(&thread,&attr,(void*)pthread_handle_message,(void*)&(events[n].data.fd)))
                {
                        perror("pthread_creat error!");
                        exit(-1);
                }
            }
        }
    }
    close(listener);
    return 0;
}

udp客戶端 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[n] = '/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; }