任务详情

基于华为鲲鹏云服务器CentOS中（或Ubuntu），使用Linux Socket实现：

time服务器的客户端服务器，提交程序运行截图
echo服务器的客户端服务器，提交程序运行截图，服务器把客户端传进来的内容加入“服务器进程pid 你的学号姓名 echo :”返回给客户端
服务器部署到华为云服务器，客户端用Ubuntu虚拟机。
要用多线程或者多进程实现,至少连接两个客户端。
把服务器部署到试验箱。（加分项）

查看系统ip

time服务器的客户端服务器，提交程序运行截图

timeserver.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
 
#define MAXBUF 1000
#define PORT 1203

int main(int argc, char const *argv[])
{
 int sock = 0;
 int n = 0;
 int reuse = 1;
 int cli_len = sizeof(struct sockaddr);
 char strbuf[MAXBUF] = {0};
 struct sockaddr_in addr, cli;
 
  
 bzero(&addr, sizeof(addr));
 addr.sin_family = PF_INET;
 addr.sin_addr.s_addr = INADDR_ANY;
 addr.sin_port = htons(PORT);
 
  
 sock = socket(AF_INET, SOCK_DGRAM, 0);
 if (sock < 0)
 {
  perror("socket");
  return -1;
 }
 
 
 setsockopt(sock , SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
 
 
 if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
 {
  perror("bind");
  return -1;
 }
 
 while(1){
  memset(strbuf, 0, MAXBUF);
  
  
  n = recvfrom(sock, strbuf, MAXBUF, 0, (struct sockaddr *)&cli, &cli_len);
  if(n<0){
   perror("recvfrom");
   return -1;
  }else{
   printf("pid is %d\n",getpid()); //process pid
   printf(" time is %s\n", strbuf);
  }
 }
 
 return 0;
}

timeclient.c

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

#define MAXBUF 1000
#define PORT 1203

int main(int argc, char const *argv[])
{
 int sock = 0;
 int n = 0;
 int reuse = 1;
 struct sockaddr_in srvsock;
 char timebuf[MAXBUF] = {0};


 if (argc != 2)
 {
  printf("Usage:%s ServerIP\n", argv[0]);
  return -1;
 }

 
 bzero(&srvsock, sizeof(srvsock));
 srvsock.sin_family = PF_INET;
 srvsock.sin_addr.s_addr = inet_addr(argv[1]);
 srvsock.sin_port = htons(PORT);
 sock = socket(AF_INET, SOCK_DGRAM, 0);

 if(sock<0){
  perror("socket");
  return -1;
 }
 

 while(1){
  sleep(1);
  time_t t=time(NULL);
  strcpy(timebuf,ctime(&t));

   
  if ((n = sendto(sock, timebuf, strlen(timebuf), 0, (struct sockaddr *) &srvsock, sizeof(struct sockaddr))) < 0)
  {
   perror("sendto");
   return -1;
  }else{
   printf("time is %s\n", timebuf);
  }
 }
}

运行截图

echo服务器的客户端服务器，提交程序运行截图，服务器把客户端传进来的内容加入“服务器进程pid 你的学号姓名 echo :”返回给客户端

echoserver.c

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

#define MAXBUF 1000
#define PORT 1203

int main(int argc, char const *argv[])
{
 int sock = 0;
 int n = 0;
 int reuse = 1;
 int cli_len = sizeof(struct sockaddr);
 char strbuf[MAXBUF] = {0};
 struct sockaddr_in addr, cli;
 
  
 bzero(&addr, sizeof(addr));
 addr.sin_family = PF_INET;
 addr.sin_addr.s_addr = INADDR_ANY;
 addr.sin_port = htons(PORT);
 
 
 sock = socket(AF_INET, SOCK_DGRAM, 0);
 if (sock < 0)
 {
  perror("socket");
  return -1;
 }
 
  
 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
 
  
 if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
 {
  perror("bind");
  return -1;
 }
 
 while(1){
  memset(strbuf, 0, MAXBUF);
   
  n = recvfrom(sock, strbuf, MAXBUF, 0, (struct sockaddr *)&cli, &cli_len);
  if(n<0){
   perror("recvfrom");
   return -1;
  }else{
   printf("pid:%d \n echo:\n",getpid());
   printf("收到来自%s(端口%d)的消息: %s\n",inet_ntoa(cli.sin_addr), PORT, strbuf);
  }
 }
 
 return 0;
}

echoclient.c

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

#define MAXBUF 1000
#define PORT 1203

int main(int argc, char const *argv[])
{
 int sock = 0;
 int n = 0;
 int reuse = 1;
 struct sockaddr_in srvsock;
 char strbuf[MAXBUF] = {0};
 
 if (argc != 2)
 {
  printf("Usage:%s ServerIP\n", argv[0]);
  return -1;
 }
 
 bzero(&srvsock, sizeof(srvsock));
 srvsock.sin_family = PF_INET;
 srvsock.sin_addr.s_addr = inet_addr(argv[1]);
 srvsock.sin_port = htons(PORT);
 
 sock = socket(AF_INET, SOCK_DGRAM, 0);
 if(sock<0){
  perror("socket");
  return -1;
 }
 
 while(1){
  memset(strbuf, 0, MAXBUF);
 
  fgets(strbuf, MAXBUF, stdin);
 
 
  if ((n = sendto(sock, strbuf, strlen(strbuf), 0, (struct sockaddr *) &srvsock, sizeof(struct sockaddr))) < 0)
  {
   perror("sendto");
   return -1;
  }else{
   printf("send to %s(port=%d) len %d:%s\n", argv[1], PORT, n, strbuf);
  }
 }
}