agent/address.c

   1 /*
   2  * This file is part of the Nice GLib ICE library.
   3  *
   4  * (C) 2006-2009 Collabora Ltd.
   5  *  Contact: Youness Alaoui
   6  * (C) 2006-2009 Nokia Corporation. All rights reserved.
   7  *  Contact: Kai Vehmanen
   8  *
   9  * The contents of this file are subject to the Mozilla Public License Version
  10  * 1.1 (the "License"); you may not use this file except in compliance with
  11  * the License. You may obtain a copy of the License at
  12  * http://www.mozilla.org/MPL/
  13  *
  14  * Software distributed under the License is distributed on an "AS IS" basis,
  15  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  16  * for the specific language governing rights and limitations under the
  17  * License.
  18  *
  19  * The Original Code is the Nice GLib ICE library.
  20  *
  21  * The Initial Developers of the Original Code are Collabora Ltd and Nokia
  22  * Corporation. All Rights Reserved.
  23  *
  24  * Contributors:
  25  *   Dafydd Harries, Collabora Ltd.
  26  *   Youness Alaoui, Collabora Ltd.
  27  *   Kai Vehmanen, Nokia
  28  *
  29  * Alternatively, the contents of this file may be used under the terms of the
  30  * the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
  31  * case the provisions of LGPL are applicable instead of those above. If you
  32  * wish to allow use of your version of this file only under the terms of the
  33  * LGPL and not to allow others to use your version of this file under the
  34  * MPL, indicate your decision by deleting the provisions above and replace
  35  * them with the notice and other provisions required by the LGPL. If you do
  36  * not delete the provisions above, a recipient may use your version of this
  37  * file under either the MPL or the LGPL.
  38  */
  39 #ifdef HAVE_CONFIG_H
  40 # include "config.h"
  41 #else
  42 #define NICEAPI_EXPORT
  43 #endif
  44
  45 #include <string.h>
  46
  47 #include "address.h"
  48
  49 #ifdef G_OS_WIN32
  50 #define inet_pton inet_pton_win32
  51 #define inet_ntop inet_ntop_win32
  52
  53
  54 static const char *
  55 inet_ntop_win32 (int af, const void *src, char *dst, socklen_t cnt)
  56 {
  57   if (af == AF_INET) {
  58     struct sockaddr_in in;
  59     memset(&in, 0, sizeof(in));
  60     in.sin_family = AF_INET;
  61     memcpy(&in.sin_addr, src, sizeof(struct in_addr));
  62     getnameinfo((struct sockaddr *)&in, sizeof(struct sockaddr_in),
  63         dst, cnt, NULL, 0, NI_NUMERICHOST);
  64     return dst;
  65   } else if (af == AF_INET6) {
  66     struct sockaddr_in6 in;
  67     memset(&in, 0, sizeof(in));
  68     in.sin6_family = AF_INET6;
  69     memcpy(&in.sin6_addr, src, sizeof(struct in_addr6));
  70     getnameinfo((struct sockaddr *)&in, sizeof(struct sockaddr_in6),
  71         dst, cnt, NULL, 0, NI_NUMERICHOST);
  72     return dst;
  73   }
  74   return NULL;
  75 }
  76
  77 static int
  78 inet_pton_win32(int af, const char *src, void *dst)
  79 {
  80   struct addrinfo hints, *res, *ressave;
  81
  82   memset(&hints, 0, sizeof(struct addrinfo));
  83   hints.ai_family = af;
  84
  85   if (getaddrinfo(src, NULL, &hints, &res) != 0) {
  86     return 0;
  87   }
  88
  89   ressave = res;
  90
  91   while (res)  {
  92     if( res->ai_addr->sa_family == AF_INET) {
  93       memcpy(dst, &((struct sockaddr_in *) res->ai_addr)->sin_addr,
  94           res->ai_addrlen);
  95       res = res->ai_next;
  96     } else if(res->ai_addr->sa_family == AF_INET6) {
  97       memcpy(dst, &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr,
  98           res->ai_addrlen);
  99       res = res->ai_next;
 100     }
 101   }
 102
 103   freeaddrinfo(ressave);
 104   return 1;
 105 }
 106
 107 #endif
 108
 109
 110
 111 NICEAPI_EXPORT void
 112 nice_address_init (NiceAddress *addr)
 113 {
 114   addr->s.addr.sa_family = AF_UNSPEC;
 115   memset (&addr->s, 0, sizeof(addr->s));
 116 }
 117
 118 NICEAPI_EXPORT NiceAddress *
 119 nice_address_new (void)
 120 {
 121   NiceAddress *addr = g_slice_new0 (NiceAddress);
 122   nice_address_init (addr);
 123   return addr;
 124 }
 125
 126
 127 NICEAPI_EXPORT void
 128 nice_address_set_ipv4 (NiceAddress *addr, guint32 addr_ipv4)
 129 {
 130   addr->s.ip4.sin_family = AF_INET;
 131 #ifdef HAVE_SA_LEN
 132   addr->s.ip4.sin_len = sizeof (addr->sa.ip4);
 133 #endif
 134   addr->s.ip4.sin_addr.s_addr = addr_ipv4 ? htonl (addr_ipv4) : INADDR_ANY;
 135   addr->s.ip4.sin_port = 0;
 136 }
 137
 138
 139 NICEAPI_EXPORT void
 140 nice_address_set_ipv6 (NiceAddress *addr, const guchar *addr_ipv6)
 141 {
 142   addr->s.ip6.sin6_family = AF_INET6;
 143 #ifdef HAVE_SA_LEN
 144   addr->s.ip6.sin6_len = sizeof (addr->sa.ip6);
 145 #endif
 146   memcpy (addr->s.ip6.sin6_addr.s6_addr, addr_ipv6, 16);
 147   addr->s.ip6.sin6_port = addr->s.ip6.sin6_scope_id = 0;
 148 }
 149
 150
 151 NICEAPI_EXPORT void
 152 nice_address_set_port (NiceAddress *addr, guint port)
 153 {
 154   g_assert (addr);
 155
 156   switch (addr->s.addr.sa_family)
 157     {
 158     case AF_INET:
 159       addr->s.ip4.sin_port = htons (port);
 160       break;
 161     case AF_INET6:
 162       addr->s.ip6.sin6_port = htons (port);
 163       break;
 164     default:
 165       g_return_if_reached ();
 166     }
 167 }
 168
 169
 170 guint
 171 nice_address_get_port (const NiceAddress *addr)
 172 {
 173   if (!addr)
 174           return 0;
 175
 176   switch (addr->s.addr.sa_family)
 177     {
 178     case AF_INET:
 179       return ntohs (addr->s.ip4.sin_port);
 180     case AF_INET6:
 181       return ntohs (addr->s.ip6.sin6_port);
 182     }
 183
 184   g_return_val_if_reached (0);
 185 }
 186
 187
 188 NICEAPI_EXPORT gboolean
 189 nice_address_set_from_string (NiceAddress *addr, const gchar *str)
 190 {
 191   union
 192   {
 193     struct in_addr  ipv4;
 194     struct in6_addr ipv6;
 195   } a;
 196
 197   if (inet_pton (AF_INET, str, &a.ipv4) > 0)
 198       nice_address_set_ipv4 (addr, ntohl (a.ipv4.s_addr));
 199   else if (inet_pton (AF_INET6, str, &a.ipv6) > 0)
 200       nice_address_set_ipv6 (addr, a.ipv6.s6_addr);
 201   else
 202     return FALSE; /* Invalid address */
 203
 204   return TRUE;
 205 }
 206
 207
 208 NICEAPI_EXPORT void
 209 nice_address_set_from_sockaddr (NiceAddress *addr,
 210                                 const struct sockaddr *sa)
 211 {
 212   switch (sa->sa_family)
 213     {
 214     case AF_INET:
 215       memcpy(&addr->s.ip4, sa, sizeof (addr->s.ip4));
 216       break;
 217     case AF_INET6:
 218       memcpy(&addr->s.ip6, sa, sizeof (addr->s.ip6));
 219       break;
 220     default:
 221       g_return_if_reached ();
 222     }
 223 }
 224
 225
 226 NICEAPI_EXPORT void
 227 nice_address_copy_to_sockaddr (const NiceAddress *addr,
 228                                struct sockaddr *sa)
 229 {
 230   struct sockaddr_in *sin4 = (struct sockaddr_in *)sa;
 231   struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 232
 233   g_assert (sa);
 234
 235   switch (addr->s.addr.sa_family)
 236     {
 237     case AF_INET:
 238       memcpy (sin4, &addr->s.ip4, sizeof (*sin4));
 239       break;
 240     case AF_INET6:
 241       memcpy (sin6, &addr->s.ip6, sizeof (*sin6));
 242       break;
 243     default:
 244       g_return_if_reached ();
 245     }
 246 }
 247
 248 NICEAPI_EXPORT void
 249 nice_address_to_string (const NiceAddress *addr, gchar *dst)
 250 {
 251   switch (addr->s.addr.sa_family) {
 252     case AF_INET:
 253       inet_ntop (AF_INET, &addr->s.ip4.sin_addr, dst, INET_ADDRSTRLEN);
 254       break;
 255     case AF_INET6:
 256       inet_ntop (AF_INET6, &addr->s.ip6.sin6_addr, dst, INET6_ADDRSTRLEN);
 257       break;
 258     default:
 259       g_return_if_reached ();
 260   }
 261 }
 262
 263
 264 NICEAPI_EXPORT gboolean
 265 nice_address_equal (const NiceAddress *a, const NiceAddress *b)
 266 {
 267   if (a->s.addr.sa_family != b->s.addr.sa_family)
 268     return FALSE;
 269
 270   switch (a->s.addr.sa_family)
 271     {
 272     case AF_INET:
 273       return (a->s.ip4.sin_addr.s_addr == b->s.ip4.sin_addr.s_addr)
 274           && (a->s.ip4.sin_port == b->s.ip4.sin_port);
 275
 276     case AF_INET6:
 277       return IN6_ARE_ADDR_EQUAL (&a->s.ip6.sin6_addr, &b->s.ip6.sin6_addr)
 278           && (a->s.ip6.sin6_port == b->s.ip6.sin6_port)
 279           && (a->s.ip6.sin6_scope_id == b->s.ip6.sin6_scope_id);
 280     }
 281
 282   g_return_val_if_reached (FALSE);
 283 }
 284
 285
 286 NICEAPI_EXPORT NiceAddress *
 287 nice_address_dup (const NiceAddress *a)
 288 {
 289   NiceAddress *dup = g_slice_new0 (NiceAddress);
 290
 291   *dup = *a;
 292   return dup;
 293 }
 294
 295
 296 NICEAPI_EXPORT void
 297 nice_address_free (NiceAddress *addr)
 298 {
 299   g_slice_free (NiceAddress, addr);
 300 }
 301
 302
 303 /* "private" in the sense of "not routable on the Internet" */
 304 static gboolean
 305 ipv4_address_is_private (guint32 addr)
 306 {
 307   addr = ntohl (addr);
 308
 309   /* http://tools.ietf.org/html/rfc3330 */
 310   return (
 311       /* 10.0.0.0/8 */
 312       ((addr & 0xff000000) == 0x0a000000) ||
 313       /* 172.16.0.0/12 */
 314       ((addr & 0xfff00000) == 0xac100000) ||
 315       /* 192.168.0.0/16 */
 316       ((addr & 0xffff0000) == 0xc0a80000) ||
 317       /* 127.0.0.0/8 */
 318       ((addr & 0xff000000) == 0x7f000000));
 319 }
 320
 321
 322 static gboolean
 323 ipv6_address_is_private (const guchar *addr)
 324 {
 325   return (
 326       /* fe80::/10 */
 327       ((addr[0] == 0xfe) && ((addr[1] & 0xc) == 0x80)) ||
 328       /* fc00::/7 */
 329       ((addr[0] & 0xfe) == 0xfc) ||
 330       /* ::1 loopback */
 331       ((memcmp (addr, "\x00\x00\x00\x00"
 332                 "\x00\x00\x00\x00"
 333                 "\x00\x00\x00\x00"
 334                 "\x00\x00\x00\x01", 16) == 0)));
 335 }
 336
 337
 338 NICEAPI_EXPORT gboolean
 339 nice_address_is_private (const NiceAddress *a)
 340 {
 341   switch (a->s.addr.sa_family)
 342     {
 343     case AF_INET:
 344       return ipv4_address_is_private (a->s.ip4.sin_addr.s_addr);
 345     case AF_INET6:
 346       return ipv6_address_is_private (a->s.ip6.sin6_addr.s6_addr);
 347     }
 348
 349   g_return_val_if_reached (FALSE);
 350 }
 351
 352
 353 NICEAPI_EXPORT gboolean
 354 nice_address_is_valid (const NiceAddress *a)
 355 {
 356  switch (a->s.addr.sa_family)
 357     {
 358     case AF_INET:
 359     case AF_INET6:
 360       return TRUE;
 361     default:
 362       return FALSE;
 363     }
 364 }