C udp实现c/s

服务器：

/*****************************************************
copyright (C), 2014-2015, Lighting Studio. Co.,     Ltd. 
File name：
Author:fhb    Version:0.1    Date: 
Description：
Funcion List: 
*****************************************************/


#include
#include
#include
#include
#include
#include




int main()
{
int listenfd,connfd;
int n;
int i;
struct sockaddr_in servaddr,cliaddr;
socklen_t clilen;
char mesg[1000];


listenfd = socket(AF_INET,SOCK_DGRAM,0);

bzero(&servaddr,sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(32000);


bind(listenfd,(struct sockaddr *)&servaddr,sizeof(servaddr));


    while(1)
{
bzero(&cliaddr,sizeof(cliaddr));
int cliaddrlen = sizeof(struct sockaddr);
recvfrom(listenfd,mesg,sizeof(mesg),0,(struct sockaddr*)&cliaddr,&cliaddrlen);


printf("**************************************\n");
printf("%s\n",mesg);
printf("**************************************\n");


sendto(listenfd,mesg,sizeof(mesg),0,(struct sockaddr *)&cliaddr,cliaddrlen);
}

close(listenfd);


    return 0;
}

客户端：

/*****************************************************
copyright (C), 2014-2015, Lighting Studio. Co.,     Ltd. 
File name：
Author:fhb    Version:0.1    Date: 
Description：
Funcion List: 
*****************************************************/


#include
#include
#include
#include
#include
#include


int main(int argc,char **argv)
{
int sockfd;
int n;
struct sockaddr_in servaddr,cliaddr;
char sendline[1000];
char recvline[1000];


if(argc != 2)
{
printf("please input something!\n");
exit(0);
}


sockfd = socket(AF_INET,SOCK_DGRAM,0);


bzero(&servaddr,sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = inet_addr(argv[1]);
servaddr.sin_port = htons(32000);


connect(sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr));


while(fgets(sendline,1000,stdin)!=NULL)
{
sendto(sockfd,sendline,strlen(sendline),0,(struct sockaddr *)&servaddr,sizeof(servaddr));
n = recvfrom(sockfd,recvline,1000,0,NULL,NULL);


recvline[n] = '\0';
fputs(recvline,stdout);
}




    return 0;
}