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[gapil.git] / sources / gethost.c

diff --git a/sources/gethost.c b/sources/gethost.c
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+/* 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 1.3 2003/05/02 09:55:14 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);
+}
+