lib/wind/idn-lookup.c

   1 /*
   2  * Copyright (c) 2004 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37 #include <assert.h>
  38 #include <err.h>
  39 #include <netdb.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <sys/socket.h>
  44 #include <sys/types.h>
  45
  46 #include <getarg.h>
  47 #include <roken.h>
  48
  49 #include "windlocl.h"
  50
  51 static int version_flag = 0;
  52 static int help_flag    = 0;
  53
  54
  55 static int
  56 is_separator(uint32_t u)
  57 {
  58     return u == 0x002E || u == 0x3002;
  59 }
  60
  61 static void
  62 lookup(const char *name)
  63 {
  64     unsigned i;
  65     char encoded[1024];
  66     char *ep;
  67     int ret;
  68     struct addrinfo hints;
  69     struct addrinfo *ai;
  70
  71     size_t u_len = strlen(name);
  72     uint32_t *u = malloc(u_len * sizeof(uint32_t));
  73     size_t norm_len = u_len * 2;
  74     uint32_t *norm = malloc(norm_len * sizeof(uint32_t));
  75
  76     if (u == NULL && u_len != 0)
  77         errx(1, "malloc failed");
  78     if (norm == NULL && norm_len != 0)
  79         errx(1, "malloc failed");
  80
  81     ret = wind_utf8ucs4(name, u, &u_len);
  82     if (ret)
  83         errx(1, "utf8 conversion failed");
  84     ret = wind_stringprep(u, u_len, norm, &norm_len, WIND_PROFILE_NAME);
  85     if (ret)
  86         errx(1, "stringprep failed");
  87     free(u);
  88
  89     ep = encoded;
  90     for (i = 0; i < norm_len; ++i) {
  91         unsigned j;
  92         size_t len;
  93
  94         for (j = i; j < norm_len && !is_separator(norm[j]); ++j)
  95             ;
  96         len = sizeof(encoded) - (ep - encoded);
  97         ret = wind_punycode_label_toascii(norm + i, j - i, ep, &len);
  98         if (ret)
  99             errx(1, "punycode failed");
 100
 101         ep += len;
 102         *ep++ = '.';
 103         i = j;
 104     }
 105     *ep = '\0';
 106     free(norm);
 107
 108     printf("Converted \"%s\" into \"%s\"\n", name, encoded);
 109
 110     memset(&hints, 0, sizeof(hints));
 111     hints.ai_flags = AI_CANONNAME;
 112     ret = getaddrinfo(encoded, NULL, &hints, &ai);
 113     if(ret)
 114         errx(1, "getaddrinfo failed: %s", gai_strerror(ret));
 115     printf("canonical-name: %s\n", ai->ai_canonname);
 116     freeaddrinfo(ai);
 117 }
 118
 119 static struct getargs args[] = {
 120     {"version", 0,      arg_flag,       &version_flag,
 121      "print version", NULL },
 122     {"help",    0,      arg_flag,       &help_flag,
 123      NULL, NULL }
 124 };
 125
 126 static void
 127 usage (int ret)
 128 {
 129     arg_printusage(args, sizeof(args)/sizeof(args[0]), NULL,
 130                    "dns-names ...");
 131     exit (ret);
 132 }
 133
 134 int
 135 main(int argc, char **argv)
 136 {
 137     int optidx = 0;
 138     unsigned i;
 139
 140     setprogname (argv[0]);
 141
 142     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 143         usage(1);
 144
 145     if (help_flag)
 146         usage (0);
 147
 148     if(version_flag){
 149         print_version(NULL);
 150         exit(0);
 151     }
 152
 153     argc -= optidx;
 154     argv += optidx;
 155
 156     if (argc == 0)
 157         usage(1);
 158
 159     for (i = 0; i < argc; ++i)
 160         lookup(argv[i]);
 161     return 0;
 162 }