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/*
Copyright (C) 2008 Andreas Baumann <abaumann@yahoo.com>
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "port/sys.h"
#include "port/netdb.h" /* for getaddrinfo, NI_MAXHOST */
#include "port/stdlib.h" /* for exit, EXIT_SUCCESS, itoa */
#include <stdio.h> /* for fprintf */
#include <string.h> /* for memset */
int main( int argc, char **argv ) {
struct addrinfo hints;
struct addrinfo *result;
struct addrinfo *res;
int error;
if( argc != 3 ) {
fputs( "usage: test_getaddrinfo <host> <port>\n", stderr );
exit( EXIT_FAILURE );
}
#ifdef _WIN32
WSADATA wsa_data;
WSAStartup( MAKEWORD( 2, 2 ), &wsa_data );
#endif
/* tell getaddrinfo what we want */
memset( &hints, 0, sizeof( struct addrinfo ) );
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
/* resolve the domain name into a list of addresses */
error = getaddrinfo( argv[1], argv[2], &hints, &result );
if( error != 0 ) {
fprintf( stderr, "getaddrinfo failed: %s (%d)\n",
gai_strerror( error ), error );
#ifdef _WIN32
WSACleanup( );
#endif
return EXIT_FAILURE;
}
/* loop over all returned results and do inverse lookup */
for( res = result; res != NULL; res = res->ai_next ) {
char hostname[NI_MAXHOST] = "";
char service[NI_MAXSERV] = "";
error = getnameinfo( res->ai_addr, res->ai_addrlen, hostname, NI_MAXHOST,
service, NI_MAXSERV,
NI_NUMERICSERV | NI_NUMERICHOST );
if( error != 0 ) {
fprintf( stderr, "getnameinfo failed: %s (%d)\n",
gai_strerror( error ), error );
#ifdef _WIN32
WSACleanup( );
#endif
return EXIT_FAILURE;
}
if( *hostname != '\0' ) {
printf( "Got IP %s and port %s\n", hostname, service );
}
}
freeaddrinfo( result );
#ifdef _WIN32
WSACleanup( );
#endif
return EXIT_SUCCESS;
}
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