/****************************************************************************    Copyright (C) 2006 by Soasen Co.,Ltd.   **    desc: 　CS模式通用客戶端*    座友銘：凡是程序當(dāng)前不需要的，都是垃圾，80%的時間做20%的事情。（程序的效率）*                                                                         ****************************************************************************/#include	<sys/types.h>#include	<sys/socket.h>#include	<netinet/in.h>#include	<arpa/inet.h>#include	<netdb.h>#include	<stdio.h>#include	<unistd.h>#include	<errno.h>#include    <string.h>#include	<stdlib.h>#define	MAXDATASIZE	1024void process(FILE *fp,int sockfd);int main(int argc,char *argv[]){    int sd,rc,i;    struct sockaddr_in localAddr,servAddr;    struct hostent *h;    int	port;    if(argc!=3)    {        printf("usage: %s<server><IP>\n",argv[0]);        exit(1);    }    h=gethostbyname(argv[1]);    if(h==NULL)    {        printf("%s:unknown host'%s'\n",argv[0],argv[1]);        exit(1);    }    if((port=atoi(argv[2]))<0)     {         fprintf(stderr,"Usage:%s portnumber\a\n",argv[0]);         exit(1);     }     servAddr.sin_family=h->h_addrtype;    memcpy((char *)&servAddr.sin_addr.s_addr,h->h_addr_list[0],h->h_length);    servAddr.sin_port=htons(port);    sd=socket(AF_INET,SOCK_STREAM,0);    if(sd<0)    {        perror("cannot open socket");        exit(1);    }    /*綁定端口號*/    localAddr.sin_family=AF_INET;    localAddr.sin_addr.s_addr=htonl(INADDR_ANY);    localAddr.sin_port=htons(0);    rc=bind(sd,(struct sockaddr *)&localAddr,sizeof(localAddr));    if(rc<0)    {        printf("%s:cannot bind port TCP %d\n",argv[0],port);        perror("error");        exit(1);    }    /*連接到服務(wù)器*/    rc=connect(sd,(struct sockaddr *)&servAddr,sizeof(servAddr));    if(rc<0)    {        perror("cannot connect");        exit(1);    }    process(stdin,sd);    close(sd);}void process(FILE *fp,int sockfd){    char sendline[MAXDATASIZE],revline[MAXDATASIZE];    int numbytes;    printf("Connetc to server:\n");    while(fgets(sendline,MAXDATASIZE,fp)!=NULL){        send(sockfd,sendline,strlen(sendline),0);        if((numbytes=recv(sockfd,revline,MAXDATASIZE,0))==0){            printf("server termined.\n");            return;        }        revline[numbytes]='\0';        printf("recv message:%s\n",revline);    }}