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;
  73     size_t norm_len = u_len * 8;
  74     uint32_t *norm;
  75
  76     if (u_len == 0)
  77         return;
  78
  79     u = calloc(u_len, sizeof(uint32_t));
  80     if (u == NULL && u_len != 0)
  81         errx(1, "malloc failed");
  82     norm = calloc(norm_len, sizeof(uint32_t));
  83     if (norm == NULL && norm_len != 0)
  84         errx(1, "malloc failed");
  85
  86     ret = wind_utf8ucs4(name, u, &u_len);
  87     if (ret)
  88         errx(1, "utf8 conversion failed");
  89     ret = wind_stringprep(u, u_len, norm, &norm_len, WIND_PROFILE_NAME);
  90     if (ret)
  91         errx(1, "stringprep failed");
  92     free(u);
  93
  94     ep = encoded;
  95     for (i = 0; i < norm_len; ++i) {
  96         unsigned j;
  97         size_t len;
  98
  99         for (j = i; j < norm_len && !is_separator(norm[j]); ++j)
 100             ;
 101         len = sizeof(encoded) - (ep - encoded);
 102         ret = wind_punycode_label_toascii(norm + i, j - i, ep, &len);
 103         if (ret)
 104             errx(1, "punycode failed");
 105
 106         ep += len;
 107         *ep++ = '.';
 108         i = j;
 109     }
 110     *ep = '\0';
 111     free(norm);
 112
 113     printf("Converted \"%s\" into \"%s\"\n", name, encoded);
 114
 115     memset(&hints, 0, sizeof(hints));
 116     hints.ai_flags = AI_CANONNAME;
 117     ret = getaddrinfo(encoded, NULL, &hints, &ai);
 118     if(ret)
 119         errx(1, "getaddrinfo failed: %s", gai_strerror(ret));
 120     printf("canonical-name: %s\n", ai->ai_canonname);
 121     freeaddrinfo(ai);
 122 }
 123
 124 static struct getargs args[] = {
 125     {"version", 0,      arg_flag,       &version_flag,
 126      "print version", NULL },
 127     {"help",    0,      arg_flag,       &help_flag,
 128      NULL, NULL }
 129 };
 130
 131 static void
 132 usage (int ret)
 133 {
 134     arg_printusage(args, sizeof(args)/sizeof(args[0]), NULL,
 135                    "dns-names ...");
 136     exit (ret);
 137 }
 138
 139 int
 140 main(int argc, char **argv)
 141 {
 142     int optidx = 0;
 143     unsigned i;
 144
 145     setprogname (argv[0]);
 146
 147     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 148         usage(1);
 149
 150     if (help_flag)
 151         usage (0);
 152
 153     if(version_flag){
 154         print_version(NULL);
 155         exit(0);
 156     }
 157
 158     argc -= optidx;
 159     argv += optidx;
 160
 161     if (argc == 0)
 162         usage(1);
 163
 164     for (i = 0; i < argc; ++i)
 165         lookup(argv[i]);
 166     return 0;
 167 }