程序分析题: 2、以下是两段服务器-客观端网络通讯程序,...
程序分析题: 2、以下是两段服务器-客观端网络通讯程序,请仔细阅读代码,并用简洁的语言回答问题。(17分) (1) 指出哪个文件是服务器端,哪个文件是客户端程序?(4分) (2) 在File1.c下划线处补全程序代码;(3分) (3) 借助流程图,用简洁的文字描述这两段代码实现的功能。(10分) File1.c #define MAXLINE 1024 int main(int argc,char **argv) { int listenfd,connfd; struct sockaddr_in sockaddr; char buff[MAXLINE]; int n; memset(&sockaddr,0,sizeof(sockaddr)); sockaddr.sin_family = AF_INET; sockaddr.sin_addr.s_addr = htonl(INADDR_ANY); sockaddr.sin_port = htons(10004); listenfd = socket(AF_INET,SOCK_STREAM,0); bind(listenfd,(struct sockaddr *) &sockaddr,sizeof(sockaddr)); listen(listenfd,1024); printf("Please wait for the client information\n"); for(;;) { if((connfd = accept(listenfd,(struct sockaddr*)NULL,NULL))==-1) { printf("accpet socket error: %s errno :%d\n",strerror(errno),errno); ______________; } n = recv(connfd,buff,MAXLINE,0); buff[n] = '\0'; printf("recv msg from client:%s",buff); close(connfd); } close(listenfd); } ---------------------------------------------------------------- ---------------------------------------------------------------- File2.c #define MAXLINE 1024 int main(int argc,char **argv) { char *servInetAddr = "127.0.0.1"; int socketfd; struct sockaddr_in sockaddr; char recvline[MAXLINE], sendline[MAXLINE]; int n; if(argc != 2) { printf("client <ipaddress> \n"); exit(0); } socketfd = socket(AF_INET,SOCK_STREAM,0); memset(&sockaddr,0,sizeof(sockaddr)); sockaddr.sin_family = AF_INET; sockaddr.sin_port = htons(10004); inet_pton(AF_INET,servInetAddr,&sockaddr.sin_addr) if((connect(socketfd,(struct sockaddr*)&sockaddr,sizeof(sockaddr))) < 0 ) { printf("connect error %s errno: %d\n",strerror(errno),errno); exit(0); } printf("send message to server\n"); fgets(sendline,1024,stdin); if((send(socketfd,sendline,strlen(sendline),0)) < 0) { printf("send mes error: %s errno : %d",strerror(errno),errno); exit(0); } close(socketfd); printf("exit\n"); exit(0); }