ser.c

unix下的服务器程序和客户端程序

#include <stdio.h> 
#include <errno.h> 
#include <unistd.h> 
#include <string.h>

#include <netdb.h> 
#include <sys/types.h> 
#include <sys/wait.h> 
#include <sys/socket.h> 
#include <netinet/in.h> 

#define PKG_LEN     100 

main() 
{ 

    struct sockaddr_in addr_in; 
    int    sockfd,newsocket; 
    int    childid; 
    int    m_pkg=0; 
    char   strTime[10]; 
    char   date[9]; 
    int    val=1; 
    char   r_buf[1024];

    memset( &addr_in, 0, sizeof( struct sockaddr_in ) ); 
    memset( r_buf, 0, sizeof( r_buf ) ); 

    addr_in.sin_family = AF_INET; 
    addr_in.sin_addr.s_addr = INADDR_ANY; 
    addr_in.sin_port = htons( 1024 ); 

    sockfd=socket( AF_INET, SOCK_STREAM, 0 ); 

    if ( sockfd<0 ) { 
         printf("socket failed!"); 
         return -1; 
    } 

    if( bind( sockfd,(struct sockaddr *)&addr_in,sizeof(addr_in)) )
    { 
        close(sockfd); 
        printf("bind failed!"); 
        return -1; 
    } 
    if ( listen(sockfd,20) ) { 
        close(sockfd); 
        printf("listen failed !"); 
         return -1; 
    } 
    while(1) 
    { 

        if( ( newsocket=accept(sockfd,0,0) ) < 0 ) 
        { 
            if( errno == EINTR ) 
                continue; 
            else 
            { 
                 printf("accept failed!"); 
                 close(sockfd); 
                 return -1 ; 
            } 
        } 
        if( ( childid = fork() ) == 0 ) 
        { 
            if(( m_pkg= read( newsocket, r_buf, PKG_LEN )) <0  ) 
            { 
                printf("read pkg failed!\n"); 
                close(newsocket); 
                return -1 ; 
            } 
            printf(" msg=%s\n", r_buf );
        } 
        close(newsocket); 
    }
}