3 * Copyright (C) 2001 Simone Piccardi
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /****************************************************************
22 * Program to test gethostbyname and getaddrinfo
24 * Author: Simone Piccardi
27 * Usage: gethost -h give all info's
29 * $Id: gethost.c,v 1.3 2003/05/02 09:55:14 piccardi Exp $
31 ****************************************************************/
33 * Include needed headers
36 #include <errno.h> /* error definitions and routines */
37 #include <stdlib.h> /* C standard library */
38 #include <unistd.h> /* unix standard library */
39 #include <stdio.h> /* standard I/O library */
40 #include <string.h> /* string functions */
41 #include <sys/types.h>
42 #include <sys/socket.h>
45 /* Help printing routine */
48 int main(int argc, char *argv[])
51 * Variables definition
58 struct addrinfo *address;
59 struct sockaddr_in *socket;
61 * Input section: decode command line parameters
64 opterr = 0; /* don't want writing to stderr */
65 while ( (i = getopt(argc, argv, "han")) != -1) {
70 case 'h': /* help option */
71 printf("Wrong -h option use\n");
75 case 'a': /* help option */
78 case 'n': /* help option */
81 case '?': /* unrecognized options */
82 printf("Unrecognized options -%c\n",optopt);
84 default: /* should not reached */
88 /* ***********************************************************
90 * Options processing completed
94 * ***********************************************************/
95 if ((argc-optind)!= 1) {
96 printf("From %d arguments, removed %d options\n", argc, optind);
100 host = gethostbyname(argv[optind]);
101 printf("gethostbyname %s\n", argv[optind]);
102 printf("Official host name %s\n", host->h_name);
103 printf("Address Type %d\n", host->h_addrtype);
104 printf("Address Lenght %d\n", host->h_length);
105 addr.s_addr = *( (unsigned long *)host->h_addr);
106 printf("Address %s\n", inet_ntoa(addr));
108 /* host = getipnodebyname(argv[optind], AF_INET, 0, &i); */
109 /* if (!host) printf("Error\n"); */
110 /* printf("getipnodebyname %s, error %d\n", argv[optind], i); */
111 /* printf("Official host name %s\n", host->h_name); */
112 /* printf("Address Type %d\n", host->h_addrtype); */
113 /* printf("Address Lenght %d\n", host->h_length); */
114 /* addr.s_addr = *( (unsigned long *)host->h_addr); */
115 /* printf("Address %s\n", inet_ntoa(addr)); */
117 hint.ai_family = PF_INET;
118 hint.ai_socktype = 0;
119 hint.ai_protocol = 0;
122 hint.ai_canonname = NULL;
124 if (i = getaddrinfo(argv[optind], "telnet", &hint, &address)) {
125 printf("getaddrinfo %s = %s \n", argv[optind], gai_strerror(i));
127 printf("Address flag %d\n", address->ai_flags);
128 printf("Address family %d\n", address->ai_family);
129 printf("Address socket type %d\n", address->ai_socktype);
130 printf("Address protocol %d\n", address->ai_protocol);
131 printf("Address lenght %d\n", address->ai_addrlen);
132 printf("Canonical name %s\n", address->ai_canonname);
133 socket = (struct sockaddr_in *) address->ai_addr;
134 printf("Address %s\n", inet_ntoa(socket->sin_addr));
135 printf("Port %d\n", htons(socket->sin_port));
136 printf("Family %d\n", socket->sin_family);
143 * routine to print usage info and exit
146 printf("Program gehost: test host name functions \n");
148 printf(" gethost [-h] address \n");
149 printf(" -h print this help\n");
150 printf(" -a use getaddrinfo\n");
151 printf(" -n use gethostbyname\n");