daytime服务器与客户端(程序)

来源：互联网发布：中世纪战争知乎编辑：程序博客网时间：2024/06/10 02:58

服务器：

#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define MAX_LINE 256

int main(int argc, char** argv)
{
int listenfd, connfd;
struct sockaddr_in servadd;

char buff[MAX_LINE];
time_t ticks;

listenfd = socket(AF_INET, SOCK_STREAM, 0);
bzero(&servadd, sizeof(servadd));
servadd.sin_family = AF_INET;
servadd.sin_addr.s_addr = htonl(INADDR_ANY);
servadd.sin_port = htons(13);
bind(listenfd, (struct sockaddr*)&servadd, sizeof(servadd));
listen(listenfd, 0);

for(; ;)
{
  connfd = accept(listenfd, (struct sockaddr*)NULL, NULL);
  ticks = time(NULL);
  snprintf(buff, sizeof(buff), "%.24s/r/n", ctime(&ticks));
  write(connfd, buff, strlen(buff));
  close(connfd);
}
}

客户端

#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define MAXLINE 256

int main(int argc, char** argv)
{
    int socketfd, n;
    char recvline[MAXLINE+1];
    struct sockaddr_in servaddr;
    if(argc != 2)
    {
        printf("usage:a.out<IP address>/n");
        exit(-1);
    }

    if((socketfd=socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
        printf("socket err/n");
        exit(-1);
    }

bzero(&servaddr, sizeof(servaddr));

    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(13);
    if(inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)
    {
        printf("inet_pton error for %s/n", argv[1]);
        exit(-1);
    }

if(connect(socketfd, (struct sockaddr*)&servaddr, sizeof(servaddr)) < 0)
{
        printf("connect error/n");
        exit(-1);
    }

while((n=read(socketfd, recvline, MAXLINE))>0)
{
  recvline[n] = 0;
  if(fputs(recvline, stdout) == EOF)
  {
        printf("fputs error/n");
        exit(-1);
    }
}

if(n<0)
{
        printf("read error/n");
        exit(-1);
    }

exit(0);
}