epan/address.h

   1 /* address.h
   2  * Definitions for structures storing addresses, and for the type of
   3  * variables holding port-type values
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #ifndef __ADDRESS_H__
  27 #define __ADDRESS_H__
  28
  29 #include <string.h>     /* for memcmp */
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif /* __cplusplus */
  34
  35 /* Types of addresses Wireshark knows about. */
  36 /* If a new address type is added here, a string representation procedure should */
  37 /* also be included in address_to_str_buf defined in to_str.c, for presentation purposes */
  38
  39 typedef enum {
  40     AT_NONE,               /* no link-layer address */
  41     AT_ETHER,              /* MAC (Ethernet, 802.x, FDDI) address */
  42     AT_IPv4,               /* IPv4 */
  43     AT_IPv6,               /* IPv6 */
  44     AT_IPX,                /* IPX */
  45     AT_SNA,                /* SNA */
  46     AT_ATALK,              /* Appletalk DDP */
  47     AT_VINES,              /* Banyan Vines */
  48     AT_OSI,                /* OSI NSAP */
  49     AT_ARCNET,             /* ARCNET */
  50     AT_FC,                 /* Fibre Channel */
  51     AT_SS7PC,              /* SS7 Point Code */
  52     AT_STRINGZ,            /* null-terminated string */
  53     AT_EUI64,              /* IEEE EUI-64 */
  54     AT_URI,                /* URI/URL/URN */
  55     AT_TIPC,               /* TIPC Address Zone,Subnetwork,Processor */
  56     AT_IB,                 /* Infiniband GID/LID */
  57     AT_USB,                /* USB Device address
  58                             * (0xffffffff represents the host) */
  59     AT_AX25,               /* AX.25 */
  60     AT_IEEE_802_15_4_SHORT /* IEEE 802.15.4 16-bit short address */
  61                            /* (the long addresses are EUI-64's */
  62 } address_type;
  63
  64 typedef struct _address {
  65     address_type  type;         /* type of address */
  66     int           hf;           /* the specific field that this addr is */
  67     int           len;          /* length of address, in bytes */
  68     const void  *data;          /* pointer to address data */
  69 } address;
  70
  71 /** Initialize an address with the given values.
  72  *
  73  * @param addr[in,out] The address to initialize.
  74  * @param addr_type[in] Address type.
  75  * @param addr_len[in] The length in bytes of the address data. For example, 4 for
  76  *                     AT_IPv4 or sizeof(struct e_in6_addr) for AT_IPv6.
  77  * @param addr_data[in] Pointer to the address data.
  78  */
  79 static inline void
  80 set_address(address *addr, address_type addr_type, int addr_len, const void * addr_data) {
  81     addr->data = addr_data;
  82     addr->type = addr_type;
  83     addr->hf   = -1;
  84     addr->len  = addr_len;
  85 }
  86 #define SET_ADDRESS(addr, addr_type, addr_len, addr_data) \
  87     set_address((addr), (addr_type), (addr_len), (addr_data))
  88
  89 /** Initialize an address from TVB data.
  90  *
  91  * Same as SET_ADDRESS but it takes a TVB and an offset. This is preferred
  92  * over passing the return value of tvb_get_ptr() to set_address().
  93  *
  94  * This calls tvb_get_ptr() (including throwing any exceptions) before
  95  * modifying the address.
  96  *
  97  * @param addr[in,out] The address to initialize.
  98  * @param addr_type[in] Address type.
  99  * @param tvb[in] Pointer to the TVB.
 100  * @param offset[in] Offset within the TVB.
 101  * @param addr_len[in] The length in bytes of the address data. For example, 4 for
 102  *                     AT_IPv4 or sizeof(struct e_in6_addr) for AT_IPv6.
 103  */
 104 #define TVB_SET_ADDRESS(addr, addr_type, tvb, offset, addr_len) \
 105     do {                            \
 106         const void *TVB_SET_ADDRESS_data = (void *)tvb_get_ptr(tvb, offset, addr_len); \
 107         set_address((addr), (addr_type), (addr_len), TVB_SET_ADDRESS_data); \
 108     } while (0)
 109
 110 /** Initialize an address with the given values including an associated field.
 111  *
 112  * @param addr[in,out] The address to initialize.
 113  * @param addr_type[in] Address type.
 114  * @param addr_len[in] The length in bytes of the address data. For example, 4 for
 115  *                 AT_IPv4 or sizeof(struct e_in6_addr) for AT_IPv6.
 116  * @param addr_data[in] Pointer to the address data.
 117  * @param addr_hf[in] The header field index to associate with the address.
 118  */
 119 static inline void
 120 set_address_hf(address *addr, address_type addr_type, int addr_len, const void * addr_data, int addr_hf) {
 121     addr->data = addr_data;
 122     addr->type = addr_type;
 123     addr->hf   = addr_hf;
 124     addr->len  = addr_len;
 125 }
 126 #define SET_ADDRESS_HF(addr, addr_type, addr_len, addr_data, addr_hf) \
 127     set_address_hf((addr), (addr_type), (addr_len), (addr_hf))
 128
 129 /** Initialize an address from TVB data including an associated field.
 130  *
 131  * Same as SET_ADDRESS_HF but it takes a TVB and an offset. This is preferred
 132  * over passing the return value of tvb_get_ptr() to set_address().
 133  *
 134  * This calls tvb_get_ptr() (including throwing any exceptions) before
 135  * modifying the address.
 136  *
 137  * @param addr[in,out] The address to initialize.
 138  * @param addr_type[in] Address type.
 139  * @param tvb[in] Pointer to the TVB.
 140  * @param offset[in] Offset within the TVB.
 141  * @param addr_len[in] The length in bytes of the address data. For example, 4 for
 142  *                     AT_IPv4 or sizeof(struct e_in6_addr) for AT_IPv6.
 143  * @param addr_hf[in] The header field index to associate with the address.
 144  */
 145 #define TVB_SET_ADDRESS_HF(addr, addr_type, tvb, offset, addr_len, addr_hf) \
 146     do {                            \
 147         const void *TVB_SET_ADDRESS_data = (void *) tvb_get_ptr(tvb, offset, addr_len); \
 148         set_address_hf((addr), (addr_type), (addr_len), TVB_SET_ADDRESS_data, (addr_hf)); \
 149     } while (0)
 150
 151 /** Compare two addresses.
 152  *
 153  * @param addr1[in] The first address to compare.
 154  * @param addr2[in] The second address to compare.
 155  * @return 0 if the addresses are equal,
 156  *  A positive number if addr1 > addr2 in some nondefined metric,
 157  *  A negative number if addr1 < addr2 in some nondefined metric.
 158  */
 159 static inline int
 160 cmp_address(const address *addr1, const address *addr2) {
 161     if (addr1->type > addr2->type) return 1;
 162     if (addr1->type < addr2->type) return -1;
 163     if (addr1->len  > addr2->len) return 1;
 164     if (addr1->len  < addr2->len) return -1;
 165     return memcmp(addr1->data, addr2->data, addr1->len);
 166 }
 167 #define CMP_ADDRESS(addr1, addr2) cmp_address((addr1), (addr2))
 168
 169 /** Check two addresses for equality.
 170  *
 171  * Given two addresses, return "true" if they're equal, "false" otherwise.
 172  * Addresses are equal only if they have the same type; if the type is
 173  * AT_NONE, they are then equal, otherwise they must have the same
 174  * amount of data and the data must be the same.
 175  *
 176  * @param addr1[in] The first address to compare.
 177  * @param addr2[in] The second address to compare.
 178  * @return TRUE if the adresses are equal, FALSE otherwise.
 179  */
 180 static inline gboolean
 181 addresses_equal(const address *addr1, const address *addr2) {
 182     if (addr1->type == addr2->type
 183             && ( addr1->type == AT_NONE
 184                  || ( addr1->len == addr2->len
 185                       && memcmp(addr1->data, addr2->data, addr1->len) == 0
 186                       )
 187                  )
 188             ) return TRUE;
 189     return FALSE;
 190 }
 191 #define ADDRESSES_EQUAL(addr1, addr2) addresses_equal((addr1), (addr2))
 192
 193 /** Copy an address, allocating a new buffer for the address data.
 194  *
 195  * @param to[in,out] The destination address.
 196  * @param from[in] The source address.
 197  */
 198 static inline void
 199 copy_address(address *to, const address *from) {
 200     guint8 *to_data;
 201
 202     to->type = from->type;
 203     to->len = from->len;
 204     to->hf = from->hf;
 205     to_data = (guint8 *)g_malloc(from->len);
 206     memcpy(to_data, from->data, from->len);
 207     to->data = to_data;
 208 }
 209 #define COPY_ADDRESS(to, from) copy_address((to), (from))
 210
 211 /** Perform a shallow copy of the address (both addresses point to the same
 212  * memory location).
 213  *
 214  * @param to[in,out] The destination address.
 215  * @param from[in] The source address.
 216  */
 217 static inline void
 218 copy_address_shallow(address *to, const address *from) {
 219     memcpy(to, from, sizeof(address));
 220     /*
 221     to->type = from->type;
 222     to->len = from->len;
 223     to->hf = from->hf;
 224     to->data = from->data;
 225     */
 226 }
 227 #define COPY_ADDRESS_SHALLOW(to, from) copy_address_shallow((to), (from))
 228
 229 /** Copy an address, allocating a new buffer for the address data
 230  *  using seasonal memory.
 231  *
 232  * @param to[in,out] The destination address.
 233  * @param from[in] The source address.
 234  */
 235 #define SE_COPY_ADDRESS(to, from)     \
 236     do {                              \
 237         void *SE_COPY_ADDRESS_data; \
 238         copy_address_shallow((to), (from)); \
 239         SE_COPY_ADDRESS_data = se_alloc((from)->len); \
 240         memcpy(SE_COPY_ADDRESS_data, (from)->data, (from)->len); \
 241         (to)->data = SE_COPY_ADDRESS_data; \
 242     } while (0)
 243
 244
 245 /** Hash an address into a hash value (which must already have been set).
 246  *
 247  * @param hash_val The existing hash value.
 248  * @param addr The address to add.
 249  * @return The new hash value.
 250  */
 251 static inline guint
 252 add_address_to_hash(guint hash_val, const address *addr) {
 253     const guint8 *hash_data = (const guint8 *)(addr)->data;
 254     int idx;
 255
 256     for (idx = 0; idx < (addr)->len; idx++) {
 257         hash_val += hash_data[idx];
 258         hash_val += ( hash_val << 10 );
 259         hash_val ^= ( hash_val >> 6 );
 260     }
 261     return hash_val;
 262 }
 263 #define ADD_ADDRESS_TO_HASH(hash_val, addr) do { hash_val = add_address_to_hash(hash_val, (addr)); } while (0)
 264
 265 /** Hash an address into a hash value (which must already have been set).
 266  *  64-bit version of add_address_to_hash().
 267  *
 268  * @param hash_val The existing hash value.
 269  * @param addr The address to add.
 270  * @return The new hash value.
 271  */
 272 static inline guint64
 273 add_address_to_hash64(guint64 hash_val, const address *addr) {
 274     const guint8 *hash_data = (const guint8 *)(addr)->data;
 275     int idx;
 276
 277     for (idx = 0; idx < (addr)->len; idx++) {
 278         hash_val += hash_data[idx];
 279         hash_val += ( hash_val << 10 );
 280         hash_val ^= ( hash_val >> 6 );
 281     }
 282     return hash_val;
 283 }
 284
 285 /* Types of port numbers Wireshark knows about. */
 286 typedef enum {
 287     PT_NONE,            /* no port number */
 288     PT_SCTP,            /* SCTP */
 289     PT_TCP,             /* TCP */
 290     PT_UDP,             /* UDP */
 291     PT_DCCP,            /* DCCP */
 292     PT_IPX,             /* IPX sockets */
 293     PT_NCP,             /* NCP connection */
 294     PT_EXCHG,           /* Fibre Channel exchange */
 295     PT_DDP,             /* DDP AppleTalk connection */
 296     PT_SBCCS,           /* FICON */
 297     PT_IDP,             /* XNS IDP sockets */
 298     PT_TIPC,            /* TIPC PORT */
 299     PT_USB,             /* USB endpoint 0xffff means the host */
 300     PT_I2C,
 301     PT_IBQP,            /* Infiniband QP number */
 302     PT_BLUETOOTH
 303 } port_type;
 304
 305 /* Types of circuit IDs Wireshark knows about. */
 306 typedef enum {
 307     CT_NONE,            /* no circuit type */
 308     CT_DLCI,            /* Frame Relay DLCI */
 309     CT_ISDN,            /* ISDN channel number */
 310     CT_X25,             /* X.25 logical channel number */
 311     CT_ISUP,            /* ISDN User Part CIC */
 312     CT_IAX2,            /* IAX2 call id */
 313     CT_H223,            /* H.223 logical channel number */
 314     CT_BICC,            /* BICC Circuit identifier */
 315     CT_DVBCI            /* DVB-CI session number|transport connection id */
 316     /* Could also have ATM VPI/VCI pairs */
 317 } circuit_type;
 318
 319 #ifdef __cplusplus
 320 }
 321 #endif /* __cplusplus */
 322
 323 #endif /* __ADDRESS_H__ */
 324
 325 /*
 326  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 327  *
 328  * Local variables:
 329  * c-basic-offset: 4
 330  * tab-width: 8
 331  * indent-tabs-mode: nil
 332  * End:
 333  *
 334  * vi: set shiftwidth=4 tabstop=8 expandtab:
 335  * :indentSize=4:tabSize=8:noTabs=true:
 336  */