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<td width="68%" background="DDl_back2.jpg" height="44"><big><big><font face="黑体"><p align="center">               ● UNIX网络编程                       (BM: clown)                </font></big></big></td></tr>
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<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="54.htm">上一层</a>][<a href="98.htm">下一篇</a>]
<hr><p align="left"><small>发信人: clown (梧桐叶), 信区: UNP <br>

标  题: 紧急模式测试程序 <br>

发信站: UNIX编程 (2001年10月12日20:19:59 星期五), 站内信件 <br>

  <br>

//client <br>

#include <stdio.h> <br>

#include <netinet/in.h> <br>

#include <arpa/inet.h> <br>

#include <sys/types.h> <br>

#include <sys/socket.h> <br>

#include <string.h> <br>

  <br>

#define SERV_PORT 8000 <br>

void str_cli(FILE *fp, int sockfd); <br>

  <br>

int main(int argc, char **argv) <br>

{ <br>

    int i, sockfd; <br>

    struct sockaddr_in servaddr; <br>

    if(argc != 2) { <br>

        printf("usage: argv[0] <IPaddress>\n"); <br>

        exit(1); <br>

    } <br>

    } <br>

    if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { <br>

        printf("create socket error\n"); <br>

        exit(1); <br>

    } <br>

    memset(&servaddr, 0, sizeof(servaddr)); <br>

    servaddr.sin_family = AF_INET; <br>

    servaddr.sin_port = htons(SERV_PORT); <br>

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

        printf("inet_pton error\n"); <br>

        exit(1); <br>

    } <br>

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

        printf("connect error\n"); <br>

        exit(1); <br>

    } <br>

    str_cli(stdin, sockfd); <br>

    close(sockfd); <br>

    return 0; <br>

} <br>

  <br>

void str_cli(FILE *fp, int sockfd) <br>

{ <br>

{ <br>

    if(send(sockfd, "123", sizeof("123"), 0) < 0) { <br>

        printf("send error\n"); <br>

        return; <br>

    } <br>

    printf("send %d bytes of normal data\n", sizeof("123")); <br>

    //sleep(1); <br>

    if(send(sockfd, "4", sizeof("4"), MSG_OOB) < 0) { <br>

        printf("send error\n"); <br>

        return; <br>

    } <br>

    printf("send %d bytes of OOB data\n", sizeof("4")); <br>

    //sleep(1); <br>

    if(send(sockfd, "56", sizeof("56"), 0) < 0) { <br>

        printf("send error\n"); <br>

        return; <br>

    } <br>

    printf("send %d bytes of normal data\n", sizeof("56")); <br>

    //sleep(1); <br>

    if(send(sockfd, "78", sizeof("78"), MSG_OOB) < 0) { <br>

        printf("send error\n"); <br>

        return; <br>

    } <br>

    } <br>

    printf("send %d bytes of OOB data\n", sizeof("78")); <br>

    //sleep(1); <br>

    return; <br>

} <br>

  <br>

//server <br>

#include <unistd.h> <br>

#include <netinet/in.h> <br>

#include <sys/types.h> <br>

#include <sys/time.h> <br>

#include <sys/socket.h> <br>

#include <string.h> <br>

#include <signal.h> <br>

#include <sys/wait.h> <br>

  <br>

#define SERV_PORT 8000 <br>

  <br>

void sig_chld(int signo); <br>

void str_echo(int sockfd); <br>

  <br>

int main() <br>

{ <br>

{ <br>

    int listenfd, connfd; <br>

    pid_t childpid; <br>

    socklen_t clilen; <br>

    struct sockaddr_in cliaddr, servaddr; <br>

    int optval, optlen; <br>

    if((listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { <br>

        printf("create socket error\n"); <br>

        exit(1); <br>

    } <br>

    memset(&servaddr, 0, sizeof(servaddr)); <br>

    servaddr.sin_family = AF_INET; <br>

    servaddr.sin_port = htons(SERV_PORT); <br>

    servaddr.sin_addr.s_addr = htonl(INADDR_ANY); <br>

  <br>

    optval = 1; <br>

    optlen = sizeof(int); <br>

    if(setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, (const void *)&optval,  op <br>

tlen) == -1) { <br>

        printf("setsockopt error\n"); <br>

        exit(1); <br>

    } <br>

  <br>

  <br>

    if(bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) { <br>

        printf("bind error\n"); <br>

        exit(1); <br>

    } <br>

    if(listen(listenfd, 5) < 0) { <br>

        printf("listen error\n"); <br>

        exit(1); <br>

    } <br>

    signal(SIGCHLD, sig_chld); <br>

    for( ; ; ) { <br>

        clilen = sizeof(cliaddr); <br>

        if((connfd = accept(listenfd, (struct sockaddr *)&cliaddr, &clilen)) < 0 <br>

) { <br>

            printf("accept error\n"); <br>

            exit(1); <br>

        } <br>

        if((childpid = fork()) == 0) {  //child process <br>

            close(listenfd); <br>

            str_echo(connfd); <br>

            exit(0); <br>

        } <br>

        close(connfd);  //parent process <br>



    } <br>

    close(listenfd); <br>

    return 0; <br>

} <br>

  <br>

void str_echo(int sockfd) <br>

{ <br>

    ssize_t n; <br>

    char line[32]; <br>

    int i, flag; <br>

  <br>

    for( ; ; ) { <br>

        if(ioctl(sockfd, SIOCATMARK, &flag) < 0) { <br>

            printf("ioctl error\n"); <br>

            return; <br>

        } <br>

        if( flag != 0) <br>

            printf("at OOB mark\n"); <br>

        if((n = recv(sockfd, line, 31, 0)) == 0) { <br>

            printf("sock end\n"); <br>

            return; //connection closed <br>

        } <br>

        } <br>

        else if( n < 0) { <br>

            printf("receive error\n"); <br>

            return; <br>

        } <br>

        line[n] = '\0'; <br>

        printf("normal %d bytes %s\n", n, line); <br>

        for(i=0; i<=n; i++) <br>

            printf("%c", line[i]); <br>

        printf("\n"); <br>

    } <br>

} <br>

  <br>

void sig_chld(int signo) <br>

{ <br>

    pid_t pid; <br>

    int stat; <br>

  <br>

    while((pid = waitpid(-1, &stat, WNOHANG)) > 0) <br>

        printf("child %d terminated\n", pid); <br>

    return; <br>

} <br>

  <br>



  <br>

//result of server <br>

normal 11 bytes 123 <br>

12345678 <br>

at OOB mark <br>

normal 1 bytes <br>

  <br>

sock end <br>

  <br>

  <br>

  <br>

  <br>

-- <br>

易朽的是生命，似那转瞬即谢的花朵；然而永存的，是对未来的渴望， <br>

是那生生世世传递下来的，不朽的，生的激情。每一朵勇敢开放的花， <br>

都是一个死亡唇边的微笑。 <br>

※ 来源:·UNIX编程 www.tiaozhan.com/unixbbs/·[FROM: 211.69.205.23] <br>

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