client.c

深圳英培特EduKit-III实验箱实验程序。一共有10多个

/*********************************************************************
* File：		client.c
* Author：	Embest	J.Zhao	2004.12.10
* Desc：		client
* History：	
*********************************************************************/

#include<sys/socket.h>
#include<stdio.h>
#include<netdb.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#define MYPORT 8000

//local host
char * host_name="127.0.0.1";

main(int argc,char *argv[]) {
	int sockfd,con_fd,numbytes,ret,pid;
	struct sockaddr_in server_addr;
	struct hostent *their_addr;
	int sin_size;
	int lis;
	char buf[256];
	char *str="Default test string.\n";
	char *ip="192.192.192.12\n";
	
	//if you input the new host ip after the command 
	//then change the default local host ip address.
	if (argc<2)
		printf("default local host : 192.192.192.12 , or you can input one after the command.\n");
	else {
		ip=argv[1];
		printf("local host ip = %s\n",ip);
	}
	
socketing:
	//creat socket.
	server_addr.sin_family=AF_INET;
	server_addr.sin_port=htons(MYPORT);
	server_addr.sin_addr.s_addr=inet_addr(ip);	//inet_addr(ip);
	bzero(&(server_addr.sin_zero),8);
	sockfd=socket(AF_INET,SOCK_STREAM,0);
	if (sockfd==-10) {
		printf("failed when creating\n");
		exit(-1);
	}
	
	//connect the server.
	if (connect(sockfd,(void*)&server_addr,sizeof(server_addr))==-1) {
		printf("failed when connecting\n");
		exit(-1);
	}
	
	//send the default string to server.
	printf("   send to server...%s\n",str);
	if (send(sockfd,str,strlen(str),0)==-1) {
		printf("failed when sending\n");
		exit(-1);
	}
	//receive a string from server.
	if (recv(sockfd,buf,sizeof(buf),0)==-1) {
		printf("failed when receiving\n");
		exit(-1);
	}
	printf("   response from server...%s\n",buf);
	close(sockfd);
}