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北城半夏4806197 的學(xué)生作業(yè)：

老師，我這里有一個報錯，不明白為什么，求解答！ 我查了一下說是ip被占用，但我嘗試了還是沒解決 #include #include #include #include #include /* See NOTES */ #include #include #include #define BACKLOG 10 //listen長度 int main(int argc, char const *argv[]) { int sfd,ret,cfd; struct sockaddr_in svr_addr,cli_addr; socklen_t len = sizeof(struct sockaddr_in); ssize_t rbytes = 0,sbytes=0; char buffer[1024] = {0}; if(argc < 3) { fprintf(stderr,"Usage : %s ip port!\n",argv[0]); exit(EXIT_FAILURE); } sfd = socket(AF_INET,SOCK_STREAM,0); if(sfd == -1) { perror("[ERROR] socket():"); exit(EXIT_FAILURE); } bzero(&svr_addr,sizeof(svr_addr)); //清零 svr_addr.sin_family = AF_INET; svr_addr.sin_port = htons(atoi(argv[2])); svr_addr.sin_addr.s_addr = inet_addr(argv[1]); //綁定ip地址與端口號 ret = bind(sfd,(const struct sockaddr *)&svr_addr, sizeof(struct sockaddr_in)); if (ret == -1) { perror("[ERROR] bind()"); exit(EXIT_FAILURE); } //設(shè)置套接字為監(jiān)聽狀態(tài)，建立監(jiān)聽隊列 ret = listen(sfd,BACKLOG); if(ret == -1) { perror("[ERROR] listen():"); exit(EXIT_FAILURE); } //建立連接，并產(chǎn)生新的客戶端套接字cfd用于數(shù)據(jù)收發(fā) cfd = accept(sfd,(struct sockaddr *)&cli_addr,&len); if(cfd == -1) { perror("[ERROR] accept():"); exit(EXIT_FAILURE); } printf("ip : %s , port : %d\n",inet_ntoa(cli_addr.sin_addr),ntohs(cli_addr.sin_port)); //客戶端從鍵盤接收發(fā)送數(shù)據(jù) for(;;) { //從客戶端發(fā)送數(shù)據(jù) rbytes = recv(cfd,buffer,sizeof(buffer),0); if(rbytes == -1) { perror("[ERROR] recv():"); exit(EXIT_FAILURE); } else if(rbytes == 0) { printf("The server hsa been shut down.\n"); } else if(rbytes > 0) { memset(buffer, 0, sizeof(buffer)); sbytes = send(cfd,buffer,sizeof(buffer),0); if(sbytes == -1) { perror("[ERROR] send():"); exit(EXIT_FAILURE); } printf("Receive: %s\n", buffer); if(strncmp(buffer,"quit",4) == 0) break; } } close(cfd); close(sfd); return 0; } 【圖片】【圖片】

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北城半夏4806197 的學(xué)生作業(yè)：

#include #include #include #include #include /* See NOTES */ #include #include #include #define BACKLOG 10 //listen長度 int main(int argc, char const *argv[]) { int sfd,ret,cfd; struct sockaddr_in svr_addr,cli_addr; socklen_t len = sizeof(struct sockaddr_in); ssize_t rbytes = 0,sbytes=0; char buffer[1024] = {0}; if(argc < 3) { fprintf(stderr,"Usage : %s ip port!\n",argv[0]); exit(EXIT_FAILURE); } sfd = socket(AF_INET,SOCK_STREAM,0); if(sfd == -1) { perror("[ERROR] socket():"); exit(EXIT_FAILURE); } bzero(&svr_addr,sizeof(svr_addr)); //清零 svr_addr.sin_family = AF_INET; svr_addr.sin_port = htons(atoi(argv[2])); svr_addr.sin_addr.s_addr = inet_addr(argv[1]); //綁定ip地址與端口號 ret = bind(sfd,(const struct sockaddr *)&svr_addr, sizeof(struct sockaddr_in)); if (ret == -1) { perror("[ERROR] bind()"); exit(EXIT_FAILURE); } //設(shè)置套接字為監(jiān)聽狀態(tài)，建立監(jiān)聽隊列 ret = listen(sfd,BACKLOG); if(ret == -1) { perror("[ERROR] listen():"); exit(EXIT_FAILURE); } //建立連接，并產(chǎn)生新的客戶端套接字cfd用于數(shù)據(jù)收發(fā) cfd = accept(sfd,(struct sockaddr *)&cli_addr,&len); if(cfd == -1) { perror("[ERROR] accept():"); exit(EXIT_FAILURE); } printf("ip : %s , port : %d\n",inet_ntoa(cli_addr.sin_addr),ntohs(cli_addr.sin_port)); //客戶端從鍵盤接收發(fā)送數(shù)據(jù) for(;;) { //從客戶端發(fā)送數(shù)據(jù) rbytes = recv(cfd,buffer,sizeof(buffer),0); if(rbytes == -1) { perror("[ERROR] recv():"); exit(EXIT_FAILURE); } else if(rbytes == 0) { printf("The server hsa been shut down.\n"); } else if(rbytes > 0) { memset(buffer, 0, sizeof(buffer)); sbytes = send(cfd,buffer,sizeof(buffer),0); if(sbytes == -1) { perror("[ERROR] send():"); exit(EXIT_FAILURE); } printf("Receive: %s\n", buffer); if(strncmp(buffer,"quit",4) == 0) break; } } close(cfd); close(sfd); return 0; }

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