+/* gethost.c
+ *
+ * Copyright (C) 2001 Simone Piccardi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/****************************************************************
+ *
+ * Program gethost.c:
+ * Program to test gethostbyname and getaddrinfo
+ *
+ * Author: Simone Piccardi
+ * Aug. 2002
+ *
+ * Usage: gethost -h give all info's
+ *
+ * $Id: gethost.c,v 1.1 2002/08/27 16:05:04 piccardi Exp $
+ *
+ ****************************************************************/
+/*
+ * Include needed headers
+ */
+#define _GNU_SOURCE
+#include <errno.h> /* error definitions and routines */
+#include <stdlib.h> /* C standard library */
+#include <unistd.h> /* unix standard library */
+#include <stdio.h> /* standard I/O library */
+#include <string.h> /* string functions */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
+/* Help printing routine */
+void usage(void);
+
+int main(int argc, char *argv[])
+{
+/*
+ * Variables definition
+ */
+ int i;
+ int use = 0;
+ struct hostent *host;
+ struct in_addr addr;
+ struct addrinfo hint;
+ struct addrinfo *address;
+ struct sockaddr_in *socket;
+ /*
+ * Input section: decode command line parameters
+ * Use getopt function
+ */
+ opterr = 0; /* don't want writing to stderr */
+ while ( (i = getopt(argc, argv, "han")) != -1) {
+ switch (i) {
+ /*
+ * Handling options
+ */
+ case 'h': /* help option */
+ printf("Wrong -h option use\n");
+ usage();
+ return -1;
+ break;
+ case 'a': /* help option */
+ use = 1;
+ break;
+ case 'n': /* help option */
+ use = 0;
+ break;
+ case '?': /* unrecognized options */
+ printf("Unrecognized options -%c\n",optopt);
+ usage();
+ default: /* should not reached */
+ usage();
+ }
+ }
+ /* ***********************************************************
+ *
+ * Options processing completed
+ *
+ * Main code beginning
+ *
+ * ***********************************************************/
+ if ((argc-optind)!= 1) {
+ printf("From %d arguments, removed %d options\n", argc, optind);
+ usage();
+ }
+ if (use == 0) {
+ host = gethostbyname(argv[optind]);
+ printf("gethostbyname %s\n", argv[optind]);
+ printf("Official host name %s\n", host->h_name);
+ printf("Address Type %d\n", host->h_addrtype);
+ printf("Address Lenght %d\n", host->h_length);
+ addr.s_addr = *( (unsigned long *)host->h_addr);
+ printf("Address %s\n", inet_ntoa(addr));
+ } else {
+/* host = getipnodebyname(argv[optind], AF_INET, 0, &i); */
+/* if (!host) printf("Error\n"); */
+/* printf("getipnodebyname %s, error %d\n", argv[optind], i); */
+/* printf("Official host name %s\n", host->h_name); */
+/* printf("Address Type %d\n", host->h_addrtype); */
+/* printf("Address Lenght %d\n", host->h_length); */
+/* addr.s_addr = *( (unsigned long *)host->h_addr); */
+/* printf("Address %s\n", inet_ntoa(addr)); */
+ hint.ai_flags = 0;
+ hint.ai_family = PF_INET;
+ hint.ai_socktype = 0;
+ hint.ai_protocol = 0;
+ hint.ai_addrlen = 0;
+ hint.ai_addr = NULL;
+ hint.ai_canonname = NULL;
+ hint.ai_next = NULL;
+ if (i = getaddrinfo(argv[optind], "telnet", &hint, &address)) {
+ printf("getaddrinfo %s = %s \n", argv[optind], gai_strerror(i));
+ } else {
+ printf("Address flag %d\n", address->ai_flags);
+ printf("Address family %d\n", address->ai_family);
+ printf("Address socket type %d\n", address->ai_socktype);
+ printf("Address protocol %d\n", address->ai_protocol);
+ printf("Address lenght %d\n", address->ai_addrlen);
+ printf("Canonical name %s\n", address->ai_canonname);
+ socket = (struct sockaddr_in *) address->ai_addr;
+ printf("Address %s\n", inet_ntoa(socket->sin_addr));
+ printf("Port %d\n", htons(socket->sin_port));
+ printf("Family %d\n", socket->sin_family);
+
+ }
+ }
+ return 0;
+}
+/*
+ * routine to print usage info and exit
+ */
+void usage(void) {
+ printf("Program gehost: test host name functions \n");
+ printf("Usage:\n");
+ printf(" gethost [-h] address \n");
+ printf(" -h print this help\n");
+ printf(" -a use getaddrinfo\n");
+ printf(" -n use gethostbyname\n");
+
+ exit(1);
+}
+
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