Linux _多线程并发服务TCP

client1.c

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <string.h>

#define BUFF_SIZE 1024


int main(void)
{
    int sockfd;
    struct sockaddr_in server_addr;
    int ret;
    int pd;
    char buff[BUFF_SIZE];

    sockfd = socket (AF_INET, SOCK_STREAM, 0);
    server_addr.sin_addr.s_addr = inet_addr("10.10.0.9");
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(9000);


    ret = connect(sockfd, (struct sockaddr*)&server_addr, sizeof(server_addr));
    if (ret == -1) {
        perror("connect");
        exit(errno);
    }

    strcpy(buff, "hello");
    ret = write(sockfd, buff, strlen(buff)+1);
    if (ret == -1) {
        perror("client write");
        exit(errno);
    }

    ret = read(sockfd, buff, sizeof(buff));
    if (ret == -1) {
        perror("client read");
        exit(errno);
    }

    printf("%s\n", buff);
    exit(0);
}

server1.c

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>

#define BUFF_SIZE 1024

 //–Ë∂‘∏√»´æ÷±‰¡øΩ¯––ª•≥‚±£ª§,ªÚΩ¯––◊™¥¢°£
struct sockaddr_in client_addr;
int clientfd;

static void str2up(char *p)
{
    while (*p) {
        if (*p >= 'a' && *p <= 'z') {
            *p = *p - 'a' + 'A';
        }
        p++;
    }
}

static void * client_thread_handle(void *arg)
{
    char buff[BUFF_SIZE]; 
    char tmp[100];
    int fd = clientfd;
    int ret;

    ret = read(fd, buff, sizeof(buff));
    if (ret==-1) {
        perror("read");
        exit(1);
    }

    str2up(buff);
    sprintf(tmp, "-thread(%u)", pthread_self());
    strcat(buff, tmp);  

    ret = write(fd, buff, strlen(buff)+1);  
    if (ret == -1) {
        perror("write");
        exit(1);
    }

    sleep(3);
    pthread_exit(0);
}

int main(void)
{
    int sockfd;
    struct sockaddr_in server_addr;
    int ret;
    int pd;

    socklen_t len;
    pthread_t pt;

    sockfd = socket (AF_INET, SOCK_STREAM, 0);
    server_addr.sin_addr.s_addr = htons(INADDR_ANY);
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(9000);

    /*  π∂Àø⁄ø…÷ÿ∏¥∞Û∂® */
    int on = 1;
    int ret_val;
    ret_val = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
    if(ret_val < 0) {
        perror("setsockopt SO_REUSEADDR");
        exit(1);    
    }

    ret = bind(sockfd, (struct sockaddr*)&server_addr, sizeof(server_addr));
    if (ret == -1) {
        perror("bind");
        exit(errno);
    }

    ret = listen(sockfd, 5);
    if (ret == -1) {
        perror("listen");
        exit(errno);
    }

    while (1) {
        clientfd = accept(sockfd, (struct sockaddr*)&client_addr, &len);
        if (clientfd == -1) {
            perror("accept");
            //exit(errno);
            continue;
        }

        /* –Ë“™∂ÓÕ‚∂‘clientfdΩ¯––ª•≥‚±£ª§ªÚ’flΩ¯––◊™¥¢ */
        ret = pthread_create(&pt, 0, client_thread_handle, 0);
        if (ret == -1)  {
            perror("pthread_create");
            //exit(errno);
            continue;
        } 

        pthread_detach(pt);
    }

    exit(0);
}