acountry.c

   1 /*
   2  *
   3  * IP-address/hostname to country converter.
   4  *
   5  * Problem; you want to know where IP a.b.c.d is located.
   6  *
   7  * Use ares_gethostbyname ("d.c.b.a.zz.countries.nerd.dk")
   8  * and get the CNAME (host->h_name). Result will be:
   9  *   CNAME = zz<CC>.countries.nerd.dk with address 127.0.x.y (ver 1) or
  10  *   CNAME = <a.b.c.d>.zz.countries.nerd.dk with address 127.0.x.y (ver 2)
  11  *
  12  * The 2 letter country code is in <CC> and the ISO-3166 country
  13  * number is in x.y (number = x*256 + y). Version 2 of the protocol is missing
  14  * the <CC> number.
  15  *
  16  * Ref: http://countries.nerd.dk/more.html
  17  *
  18  * Written by G. Vanem <gvanem@broadpark.no> 2006, 2007
  19  *
  20  * NB! This program may not be big-endian aware.
  21  *
  22  * Permission to use, copy, modify, and distribute this
  23  * software and its documentation for any purpose and without
  24  * fee is hereby granted, provided that the above copyright
  25  * notice appear in all copies and that both that copyright
  26  * notice and this permission notice appear in supporting
  27  * documentation, and that the name of M.I.T. not be used in
  28  * advertising or publicity pertaining to distribution of the
  29  * software without specific, written prior permission.
  30  * M.I.T. makes no representations about the suitability of
  31  * this software for any purpose.  It is provided "as is"
  32  * without express or implied warranty.
  33  */
  34
  35 #include "ares_setup.h"
  36
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <stdarg.h>
  40 #include <string.h>
  41 #include <ctype.h>
  42 #ifdef HAVE_UNISTD_H
  43 #include <unistd.h>
  44 #endif
  45 #ifdef HAVE_STRINGS_H
  46 #include <strings.h>
  47 #endif
  48
  49 #if defined(WIN32) && !defined(WATT32)
  50   #include <winsock.h>
  51 #else
  52   #include <sys/socket.h>
  53   #include <arpa/inet.h>
  54   #include <netinet/in.h>
  55   #include <netdb.h>
  56 #endif
  57
  58 #include "ares.h"
  59 #include "ares_getopt.h"
  60 #include "inet_net_pton.h"
  61 #include "inet_ntop.h"
  62 #include "ares_nowarn.h"
  63
  64 #ifndef HAVE_STRDUP
  65 #  include "ares_strdup.h"
  66 #  define strdup(ptr) ares_strdup(ptr)
  67 #endif
  68
  69 #ifndef HAVE_STRCASECMP
  70 #  include "ares_strcasecmp.h"
  71 #  define strcasecmp(p1,p2) ares_strcasecmp(p1,p2)
  72 #endif
  73
  74 #ifndef HAVE_STRNCASECMP
  75 #  include "ares_strcasecmp.h"
  76 #  define strncasecmp(p1,p2,n) ares_strncasecmp(p1,p2,n)
  77 #endif
  78
  79 #ifndef INADDR_NONE
  80 #define INADDR_NONE 0xffffffff
  81 #endif
  82
  83 static const char *usage      = "acountry [-vh?] {host|addr} ...\n";
  84 static const char  nerd_fmt[] = "%u.%u.%u.%u.zz.countries.nerd.dk";
  85 static const char *nerd_ver1  = nerd_fmt + 14;
  86 static const char *nerd_ver2  = nerd_fmt + 11;
  87 static int         verbose    = 0;
  88
  89 #define TRACE(fmt) do {               \
  90                      if (verbose > 0) \
  91                        printf fmt ;   \
  92                    } while (0)
  93
  94 static void wait_ares(ares_channel channel);
  95 static void callback(void *arg, int status, int timeouts, struct hostent *host);
  96 static void callback2(void *arg, int status, int timeouts, struct hostent *host);
  97 static void find_country_from_cname(const char *cname, struct in_addr addr);
  98
  99 static void Abort(const char *fmt, ...)
 100 {
 101   va_list args;
 102   va_start(args, fmt);
 103   vfprintf(stderr, fmt, args);
 104   va_end(args);
 105   exit(1);
 106 }
 107
 108 int main(int argc, char **argv)
 109 {
 110   ares_channel channel;
 111   int    ch, status;
 112
 113 #if defined(WIN32) && !defined(WATT32)
 114   WORD wVersionRequested = MAKEWORD(USE_WINSOCK,USE_WINSOCK);
 115   WSADATA wsaData;
 116   WSAStartup(wVersionRequested, &wsaData);
 117 #endif
 118
 119   status = ares_library_init(ARES_LIB_INIT_ALL);
 120   if (status != ARES_SUCCESS)
 121     {
 122       fprintf(stderr, "ares_library_init: %s\n", ares_strerror(status));
 123       return 1;
 124     }
 125
 126   while ((ch = ares_getopt(argc, argv, "dvh?")) != -1)
 127     switch (ch)
 128       {
 129       case 'd':
 130 #ifdef WATT32
 131         dbug_init();
 132 #endif
 133         break;
 134       case 'v':
 135         verbose++;
 136         break;
 137       case 'h':
 138       case '?':
 139       default:
 140         Abort(usage);
 141       }
 142
 143   argc -= optind;
 144   argv += optind;
 145   if (argc < 1)
 146      Abort(usage);
 147
 148   status = ares_init(&channel);
 149   if (status != ARES_SUCCESS)
 150     {
 151       fprintf(stderr, "ares_init: %s\n", ares_strerror(status));
 152       return 1;
 153     }
 154
 155   /* Initiate the queries, one per command-line argument. */
 156   for ( ; *argv; argv++)
 157     {
 158       struct in_addr addr;
 159       char buf[100];
 160
 161       /* If this fails, assume '*argv' is a host-name that
 162        * must be resolved first
 163        */
 164       if (ares_inet_pton(AF_INET, *argv, &addr) != 1)
 165         {
 166           ares_gethostbyname(channel, *argv, AF_INET, callback2, &addr);
 167           wait_ares(channel);
 168           if (addr.s_addr == INADDR_NONE)
 169             {
 170               printf("Failed to lookup %s\n", *argv);
 171               continue;
 172             }
 173         }
 174
 175       sprintf(buf, nerd_fmt,
 176               (unsigned int)(addr.s_addr >> 24),
 177               (unsigned int)((addr.s_addr >> 16) & 255),
 178               (unsigned int)((addr.s_addr >> 8) & 255),
 179               (unsigned int)(addr.s_addr & 255));
 180       TRACE(("Looking up %s...", buf));
 181       fflush(stdout);
 182       ares_gethostbyname(channel, buf, AF_INET, callback, buf);
 183     }
 184
 185   wait_ares(channel);
 186   ares_destroy(channel);
 187
 188   ares_library_cleanup();
 189
 190 #if defined(WIN32) && !defined(WATT32)
 191   WSACleanup();
 192 #endif
 193
 194   return 0;
 195 }
 196
 197 /*
 198  * Wait for the queries to complete.
 199  */
 200 static void wait_ares(ares_channel channel)
 201 {
 202   for (;;)
 203     {
 204       struct timeval *tvp, tv;
 205       fd_set read_fds, write_fds;
 206       int nfds;
 207
 208       FD_ZERO(&read_fds);
 209       FD_ZERO(&write_fds);
 210       nfds = ares_fds(channel, &read_fds, &write_fds);
 211       if (nfds == 0)
 212         break;
 213       tvp = ares_timeout(channel, NULL, &tv);
 214       select(nfds, &read_fds, &write_fds, NULL, tvp);
 215       ares_process(channel, &read_fds, &write_fds);
 216     }
 217 }
 218
 219 /*
 220  * This is the callback used when we have the IP-address of interest.
 221  * Extract the CNAME and figure out the country-code from it.
 222  */
 223 static void callback(void *arg, int status, int timeouts, struct hostent *host)
 224 {
 225   const char *name = (const char*)arg;
 226   const char *cname;
 227   char buf[20];
 228
 229   (void)timeouts;
 230
 231   if (!host || status != ARES_SUCCESS)
 232     {
 233       printf("Failed to lookup %s: %s\n", name, ares_strerror(status));
 234       return;
 235     }
 236
 237   TRACE(("\nFound address %s, name %s\n",
 238          ares_inet_ntop(AF_INET,(const char*)host->h_addr,buf,sizeof(buf)),
 239          host->h_name));
 240
 241   cname = host->h_name;  /* CNAME gets put here */
 242   if (!cname)
 243     printf("Failed to get CNAME for %s\n", name);
 244   else
 245     find_country_from_cname(cname, *(struct in_addr*)host->h_addr);
 246 }
 247
 248 /*
 249  * This is the callback used to obtain the IP-address of the host of interest.
 250  */
 251 static void callback2(void *arg, int status, int timeouts, struct hostent *host)
 252 {
 253   struct in_addr *addr = (struct in_addr*) arg;
 254
 255   (void)timeouts;
 256   if (!host || status != ARES_SUCCESS)
 257     memset(addr, INADDR_NONE, sizeof(*addr));
 258   else
 259     memcpy(addr, host->h_addr, sizeof(*addr));
 260 }
 261
 262 struct search_list {
 263        int         country_number; /* ISO-3166 country number */
 264        char        short_name[3];  /* A2 short country code */
 265        const char *long_name;      /* normal country name */
 266      };
 267
 268 static const struct search_list *list_lookup(int number, const struct search_list *list, int num)
 269 {
 270   while (num > 0 && list->long_name)
 271     {
 272       if (list->country_number == number)
 273         return (list);
 274       num--;
 275       list++;
 276     }
 277   return (NULL);
 278 }
 279
 280 /*
 281  * Ref: ftp://ftp.ripe.net/iso3166-countrycodes.txt
 282  */
 283 static const struct search_list country_list[] = {
 284        {   4, "af", "Afghanistan"                          },
 285        { 248, "ax", "Åland Island"                         },
 286        {   8, "al", "Albania"                              },
 287        {  12, "dz", "Algeria"                              },
 288        {  16, "as", "American Samoa"                       },
 289        {  20, "ad", "Andorra"                              },
 290        {  24, "ao", "Angola"                               },
 291        { 660, "ai", "Anguilla"                             },
 292        {  10, "aq", "Antarctica"                           },
 293        {  28, "ag", "Antigua & Barbuda"                    },
 294        {  32, "ar", "Argentina"                            },
 295        {  51, "am", "Armenia"                              },
 296        { 533, "aw", "Aruba"                                },
 297        {  36, "au", "Australia"                            },
 298        {  40, "at", "Austria"                              },
 299        {  31, "az", "Azerbaijan"                           },
 300        {  44, "bs", "Bahamas"                              },
 301        {  48, "bh", "Bahrain"                              },
 302        {  50, "bd", "Bangladesh"                           },
 303        {  52, "bb", "Barbados"                             },
 304        { 112, "by", "Belarus"                              },
 305        {  56, "be", "Belgium"                              },
 306        {  84, "bz", "Belize"                               },
 307        { 204, "bj", "Benin"                                },
 308        {  60, "bm", "Bermuda"                              },
 309        {  64, "bt", "Bhutan"                               },
 310        {  68, "bo", "Bolivia"                              },
 311        {  70, "ba", "Bosnia & Herzegowina"                 },
 312        {  72, "bw", "Botswana"                             },
 313        {  74, "bv", "Bouvet Island"                        },
 314        {  76, "br", "Brazil"                               },
 315        {  86, "io", "British Indian Ocean Territory"       },
 316        {  96, "bn", "Brunei Darussalam"                    },
 317        { 100, "bg", "Bulgaria"                             },
 318        { 854, "bf", "Burkina Faso"                         },
 319        { 108, "bi", "Burundi"                              },
 320        { 116, "kh", "Cambodia"                             },
 321        { 120, "cm", "Cameroon"                             },
 322        { 124, "ca", "Canada"                               },
 323        { 132, "cv", "Cape Verde"                           },
 324        { 136, "ky", "Cayman Islands"                       },
 325        { 140, "cf", "Central African Republic"             },
 326        { 148, "td", "Chad"                                 },
 327        { 152, "cl", "Chile"                                },
 328        { 156, "cn", "China"                                },
 329        { 162, "cx", "Christmas Island"                     },
 330        { 166, "cc", "Cocos Islands"                        },
 331        { 170, "co", "Colombia"                             },
 332        { 174, "km", "Comoros"                              },
 333        { 178, "cg", "Congo"                                },
 334        { 180, "cd", "Congo"                                },
 335        { 184, "ck", "Cook Islands"                         },
 336        { 188, "cr", "Costa Rica"                           },
 337        { 384, "ci", "Cote d'Ivoire"                        },
 338        { 191, "hr", "Croatia"                              },
 339        { 192, "cu", "Cuba"                                 },
 340        { 196, "cy", "Cyprus"                               },
 341        { 203, "cz", "Czech Republic"                       },
 342        { 208, "dk", "Denmark"                              },
 343        { 262, "dj", "Djibouti"                             },
 344        { 212, "dm", "Dominica"                             },
 345        { 214, "do", "Dominican Republic"                   },
 346        { 218, "ec", "Ecuador"                              },
 347        { 818, "eg", "Egypt"                                },
 348        { 222, "sv", "El Salvador"                          },
 349        { 226, "gq", "Equatorial Guinea"                    },
 350        { 232, "er", "Eritrea"                              },
 351        { 233, "ee", "Estonia"                              },
 352        { 231, "et", "Ethiopia"                             },
 353        { 238, "fk", "Falkland Islands"                     },
 354        { 234, "fo", "Faroe Islands"                        },
 355        { 242, "fj", "Fiji"                                 },
 356        { 246, "fi", "Finland"                              },
 357        { 250, "fr", "France"                               },
 358        { 249, "fx", "France, Metropolitan"                 },
 359        { 254, "gf", "French Guiana"                        },
 360        { 258, "pf", "French Polynesia"                     },
 361        { 260, "tf", "French Southern Territories"          },
 362        { 266, "ga", "Gabon"                                },
 363        { 270, "gm", "Gambia"                               },
 364        { 268, "ge", "Georgia"                              },
 365        { 276, "de", "Germany"                              },
 366        { 288, "gh", "Ghana"                                },
 367        { 292, "gi", "Gibraltar"                            },
 368        { 300, "gr", "Greece"                               },
 369        { 304, "gl", "Greenland"                            },
 370        { 308, "gd", "Grenada"                              },
 371        { 312, "gp", "Guadeloupe"                           },
 372        { 316, "gu", "Guam"                                 },
 373        { 320, "gt", "Guatemala"                            },
 374        { 324, "gn", "Guinea"                               },
 375        { 624, "gw", "Guinea-Bissau"                        },
 376        { 328, "gy", "Guyana"                               },
 377        { 332, "ht", "Haiti"                                },
 378        { 334, "hm", "Heard & Mc Donald Islands"            },
 379        { 336, "va", "Vatican City"                         },
 380        { 340, "hn", "Honduras"                             },
 381        { 344, "hk", "Hong kong"                            },
 382        { 348, "hu", "Hungary"                              },
 383        { 352, "is", "Iceland"                              },
 384        { 356, "in", "India"                                },
 385        { 360, "id", "Indonesia"                            },
 386        { 364, "ir", "Iran"                                 },
 387        { 368, "iq", "Iraq"                                 },
 388        { 372, "ie", "Ireland"                              },
 389        { 376, "il", "Israel"                               },
 390        { 380, "it", "Italy"                                },
 391        { 388, "jm", "Jamaica"                              },
 392        { 392, "jp", "Japan"                                },
 393        { 400, "jo", "Jordan"                               },
 394        { 398, "kz", "Kazakhstan"                           },
 395        { 404, "ke", "Kenya"                                },
 396        { 296, "ki", "Kiribati"                             },
 397        { 408, "kp", "Korea (north)"                        },
 398        { 410, "kr", "Korea (south)"                        },
 399        { 414, "kw", "Kuwait"                               },
 400        { 417, "kg", "Kyrgyzstan"                           },
 401        { 418, "la", "Laos"                                 },
 402        { 428, "lv", "Latvia"                               },
 403        { 422, "lb", "Lebanon"                              },
 404        { 426, "ls", "Lesotho"                              },
 405        { 430, "lr", "Liberia"                              },
 406        { 434, "ly", "Libya"                                },
 407        { 438, "li", "Liechtenstein"                        },
 408        { 440, "lt", "Lithuania"                            },
 409        { 442, "lu", "Luxembourg"                           },
 410        { 446, "mo", "Macao"                                },
 411        { 807, "mk", "Macedonia"                            },
 412        { 450, "mg", "Madagascar"                           },
 413        { 454, "mw", "Malawi"                               },
 414        { 458, "my", "Malaysia"                             },
 415        { 462, "mv", "Maldives"                             },
 416        { 466, "ml", "Mali"                                 },
 417        { 470, "mt", "Malta"                                },
 418        { 584, "mh", "Marshall Islands"                     },
 419        { 474, "mq", "Martinique"                           },
 420        { 478, "mr", "Mauritania"                           },
 421        { 480, "mu", "Mauritius"                            },
 422        { 175, "yt", "Mayotte"                              },
 423        { 484, "mx", "Mexico"                               },
 424        { 583, "fm", "Micronesia"                           },
 425        { 498, "md", "Moldova"                              },
 426        { 492, "mc", "Monaco"                               },
 427        { 496, "mn", "Mongolia"                             },
 428        { 500, "ms", "Montserrat"                           },
 429        { 504, "ma", "Morocco"                              },
 430        { 508, "mz", "Mozambique"                           },
 431        { 104, "mm", "Myanmar"                              },
 432        { 516, "na", "Namibia"                              },
 433        { 520, "nr", "Nauru"                                },
 434        { 524, "np", "Nepal"                                },
 435        { 528, "nl", "Netherlands"                          },
 436        { 530, "an", "Netherlands Antilles"                 },
 437        { 540, "nc", "New Caledonia"                        },
 438        { 554, "nz", "New Zealand"                          },
 439        { 558, "ni", "Nicaragua"                            },
 440        { 562, "ne", "Niger"                                },
 441        { 566, "ng", "Nigeria"                              },
 442        { 570, "nu", "Niue"                                 },
 443        { 574, "nf", "Norfolk Island"                       },
 444        { 580, "mp", "Northern Mariana Islands"             },
 445        { 578, "no", "Norway"                               },
 446        { 512, "om", "Oman"                                 },
 447        { 586, "pk", "Pakistan"                             },
 448        { 585, "pw", "Palau"                                },
 449        { 275, "ps", "Palestinian Territory"                },
 450        { 591, "pa", "Panama"                               },
 451        { 598, "pg", "Papua New Guinea"                     },
 452        { 600, "py", "Paraguay"                             },
 453        { 604, "pe", "Peru"                                 },
 454        { 608, "ph", "Philippines"                          },
 455        { 612, "pn", "Pitcairn"                             },
 456        { 616, "pl", "Poland"                               },
 457        { 620, "pt", "Portugal"                             },
 458        { 630, "pr", "Puerto Rico"                          },
 459        { 634, "qa", "Qatar"                                },
 460        { 638, "re", "Reunion"                              },
 461        { 642, "ro", "Romania"                              },
 462        { 643, "ru", "Russia"                               },
 463        { 646, "rw", "Rwanda"                               },
 464        { 659, "kn", "Saint Kitts & Nevis"                  },
 465        { 662, "lc", "Saint Lucia"                          },
 466        { 670, "vc", "Saint Vincent"                        },
 467        { 882, "ws", "Samoa"                                },
 468        { 674, "sm", "San Marino"                           },
 469        { 678, "st", "Sao Tome & Principe"                  },
 470        { 682, "sa", "Saudi Arabia"                         },
 471        { 686, "sn", "Senegal"                              },
 472        { 891, "cs", "Serbia and Montenegro"                },
 473        { 690, "sc", "Seychelles"                           },
 474        { 694, "sl", "Sierra Leone"                         },
 475        { 702, "sg", "Singapore"                            },
 476        { 703, "sk", "Slovakia"                             },
 477        { 705, "si", "Slovenia"                             },
 478        {  90, "sb", "Solomon Islands"                      },
 479        { 706, "so", "Somalia"                              },
 480        { 710, "za", "South Africa"                         },
 481        { 239, "gs", "South Georgia"                        },
 482        { 724, "es", "Spain"                                },
 483        { 144, "lk", "Sri Lanka"                            },
 484        { 654, "sh", "St. Helena"                           },
 485        { 666, "pm", "St. Pierre & Miquelon"                },
 486        { 736, "sd", "Sudan"                                },
 487        { 740, "sr", "Suriname"                             },
 488        { 744, "sj", "Svalbard & Jan Mayen Islands"         },
 489        { 748, "sz", "Swaziland"                            },
 490        { 752, "se", "Sweden"                               },
 491        { 756, "ch", "Switzerland"                          },
 492        { 760, "sy", "Syrian Arab Republic"                 },
 493        { 626, "tl", "Timor-Leste"                          },
 494        { 158, "tw", "Taiwan"                               },
 495        { 762, "tj", "Tajikistan"                           },
 496        { 834, "tz", "Tanzania"                             },
 497        { 764, "th", "Thailand"                             },
 498        { 768, "tg", "Togo"                                 },
 499        { 772, "tk", "Tokelau"                              },
 500        { 776, "to", "Tonga"                                },
 501        { 780, "tt", "Trinidad & Tobago"                    },
 502        { 788, "tn", "Tunisia"                              },
 503        { 792, "tr", "Turkey"                               },
 504        { 795, "tm", "Turkmenistan"                         },
 505        { 796, "tc", "Turks & Caicos Islands"               },
 506        { 798, "tv", "Tuvalu"                               },
 507        { 800, "ug", "Uganda"                               },
 508        { 804, "ua", "Ukraine"                              },
 509        { 784, "ae", "United Arab Emirates"                 },
 510        { 826, "gb", "United Kingdom"                       },
 511        { 840, "us", "United States"                        },
 512        { 581, "um", "United States Minor Outlying Islands" },
 513        { 858, "uy", "Uruguay"                              },
 514        { 860, "uz", "Uzbekistan"                           },
 515        { 548, "vu", "Vanuatu"                              },
 516        { 862, "ve", "Venezuela"                            },
 517        { 704, "vn", "Vietnam"                              },
 518        {  92, "vg", "Virgin Islands (British)"             },
 519        { 850, "vi", "Virgin Islands (US)"                  },
 520        { 876, "wf", "Wallis & Futuna Islands"              },
 521        { 732, "eh", "Western Sahara"                       },
 522        { 887, "ye", "Yemen"                                },
 523        { 894, "zm", "Zambia"                               },
 524        { 716, "zw", "Zimbabwe"                             }
 525      };
 526
 527 /*
 528  * Check if start of 'str' is simply an IPv4 address.
 529  */
 530 #define BYTE_OK(x) ((x) >= 0 && (x) <= 255)
 531
 532 static int is_addr(char *str, char **end)
 533 {
 534   int a0, a1, a2, a3, num, rc = 0, length = 0;
 535
 536   num = sscanf(str,"%3d.%3d.%3d.%3d%n",&a0,&a1,&a2,&a3,&length);
 537   if( (num == 4) &&
 538       BYTE_OK(a0) && BYTE_OK(a1) && BYTE_OK(a2) && BYTE_OK(a3) &&
 539       length >= (3+4))
 540     {
 541       rc = 1;
 542       *end = str + length;
 543     }
 544   return rc;
 545 }
 546
 547 /*
 548  * Find the country-code and name from the CNAME. E.g.:
 549  *   version 1: CNAME = zzno.countries.nerd.dk with address 127.0.2.66
 550  *              yields ccode_A" = "no" and cnumber 578 (2.66).
 551  *   version 2: CNAME = <a.b.c.d>.zz.countries.nerd.dk with address 127.0.2.66
 552  *              yields cnumber 578 (2.66). ccode_A is "";
 553  */
 554 static void find_country_from_cname(const char *cname, struct in_addr addr)
 555 {
 556   const struct search_list *country;
 557   char  ccode_A2[3], *ccopy, *dot_4;
 558   int   cnumber, z0, z1, ver_1, ver_2;
 559   unsigned long ip;
 560
 561   ip = ntohl(addr.s_addr);
 562   z0 = TOLOWER(cname[0]);
 563   z1 = TOLOWER(cname[1]);
 564   ccopy = strdup(cname);
 565   dot_4 = NULL;
 566
 567   ver_1 = (z0 == 'z' && z1 == 'z' && !strcasecmp(cname+4,nerd_ver1));
 568   ver_2 = (is_addr(ccopy,&dot_4) && !strcasecmp(dot_4,nerd_ver2));
 569
 570   if (ver_1)
 571     {
 572       const char *dot = strchr(cname, '.');
 573       if ((z0 != 'z' && z1 != 'z') || dot != cname+4)
 574         {
 575           printf("Unexpected CNAME %s (ver_1)\n", cname);
 576           return;
 577         }
 578     }
 579   else if (ver_2)
 580     {
 581       z0 = TOLOWER(dot_4[1]);
 582       z1 = TOLOWER(dot_4[2]);
 583       if (z0 != 'z' && z1 != 'z')
 584         {
 585           printf("Unexpected CNAME %s (ver_2)\n", cname);
 586           return;
 587         }
 588     }
 589   else
 590     {
 591       printf("Unexpected CNAME %s (ver?)\n", cname);
 592       return;
 593     }
 594
 595   if (ver_1)
 596     {
 597       ccode_A2[0] = (char)TOLOWER(cname[2]);
 598       ccode_A2[1] = (char)TOLOWER(cname[3]);
 599       ccode_A2[2] = '\0';
 600     }
 601   else
 602     ccode_A2[0] = '\0';
 603
 604   cnumber = ip & 0xFFFF;
 605
 606   TRACE(("Found country-code `%s', number %d\n",
 607          ver_1 ? ccode_A2 : "<n/a>", cnumber));
 608
 609   country = list_lookup(cnumber, country_list,
 610                         sizeof(country_list) / sizeof(country_list[0]));
 611   if (!country)
 612     printf("Name for country-number %d not found.\n", cnumber);
 613   else
 614     {
 615       if (ver_1)
 616         {
 617           if ((country->short_name[0] != ccode_A2[0]) ||
 618               (country->short_name[1] != ccode_A2[1]) ||
 619               (country->short_name[2] != ccode_A2[2]))
 620             printf("short-name mismatch; %s vs %s\n",
 621                    country->short_name, ccode_A2);
 622         }
 623       printf("%s (%s), number %d.\n",
 624              country->long_name, country->short_name, cnumber);
 625     }
 626   free(ccopy);
 627 }
 628