/libc/example.c
C | 74 lines | 31 code | 8 blank | 35 comment | 3 complexity | 7916a21c02a34b83a9645e8b0b70c811 MD5 | raw file
Possible License(s): LGPL-2.1, LGPL-3.0, LGPL-2.0, BSD-3-Clause
- /* example.c --- Example code showing how to use IDN enabled getaddrinfo().
- * Copyright (C) 2003-2012 Simon Josefsson
- *
- * This file is part of GNU Libidn.
- *
- * 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/>.
- *
- */
- #define _GNU_SOURCE 1
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netdb.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <locale.h> /* setlocale() */
- /*
- * Compiling against IDN enabled Libc:
- *
- * $ gcc -o example example.c -L/usr/local/glibc/lib -Wl,-rpath,/usr/local/glibc/lib -nostdinc -I/usr/local/glibc/include -I/usr/include -I/usr/lib/gcc-lib/i486-linux/3.3.3/include
- * $ CHARSET=iso-8859-1 ./example
- * locale charset `iso-8859-1'
- * gettaddrinfo(räksmörg?s.josefsson.org):
- * address `217.13.230.178'
- * canonical name `178.230.13.217.in-addr.dgcsystems.net'
- * $
- *
- * Internally the name iesg--rksmrgsa-0zap8p.josefsson.org is looked
- * up in DNS.
- */
- int
- main(int argc, char *argv[])
- {
- char *in = argc > 1 ? argv[1] : "räksmörg?s.josefsson.org";
- struct addrinfo hints;
- struct addrinfo *res = NULL;
- int rc;
- setlocale (LC_ALL, "");
- //printf("locale charset `%s'\n", stringprep_locale_charset());
- memset(&hints, 0, sizeof(hints));
- hints.ai_flags = AI_CANONNAME|AI_IDN;
- printf("gettaddrinfo(%s):\n", in);
- rc = getaddrinfo(in, NULL, &hints, &res);
- if (rc)
- printf("gai err %d: %s\n", rc, gai_strerror(rc));
- else if (res)
- printf("address `%s'\ncanonical name `%s'\n",
- res->ai_addr ?
- /* FIXME: Use inet_ntop, so it works for IPv6 too. */
- inet_ntoa(((struct sockaddr_in*)res->ai_addr)->sin_addr) : "ERROR",
- res->ai_canonname ? res->ai_canonname : "ERROR");
- else
- printf("Bad magic\n");
- return 0;
- }