osmith
/
wireshark
forked from osmocom/wireshark
1
0
Fork 0
Code Pull Requests Releases Wiki Activity
wireshark/epan/address_to_str.c

368 lines
10 KiB
C
Raw Blame History

/* address_to_str.c
* Routines for utilities to convert addresses to strings.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h> /* needed for <netinet/in.h> */
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h> /* needed for <arpa/inet.h> on some platforms */
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h> /* needed to define AF_ values on UNIX */
#endif
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h> /* needed to define AF_ values on Windows */
#endif
#ifdef NEED_INET_V6DEFS_H
# include "wsutil/inet_v6defs.h"
#endif
#include "to_str-int.h"
#include "to_str.h"
#include "value_string.h"
#include "addr_resolv.h"
#include "address_types.h"
#include "wsutil/pint.h"
#include "wsutil/str_util.h"
#include "osi-utils.h"
#include <epan/dissectors/packet-mtp3.h>
#include <stdio.h>
#include "wmem/wmem.h"
static void
ip6_to_str_buf_len(const guchar* src, char *buf, size_t buf_len);
/*
* If a user _does_ pass in a too-small buffer, this is probably
* going to be too long to fit. However, even a partial string
* starting with "[Buf" should provide enough of a clue to be
* useful.
*/
#define BUF_TOO_SMALL_ERR "[Buffer too small]"
#define IPV4_LENGTH 4
#define IPV6_LENGTH 16
/* const char *
* inet_ntop6(src, dst, size)
* convert IPv6 binary address into presentation (printable) format
* author:
* Paul Vixie, 1996.
*/
static void
ip6_to_str_buf_len(const guchar* src, char *buf, size_t buf_len)
{
struct { int base, len; } best, cur;
guint words[8];
int i;
if (buf_len < MAX_IP6_STR_LEN) { /* buf_len < 40 */
g_strlcpy(buf, BUF_TOO_SMALL_ERR, buf_len); /* Let the unexpected value alert user */
return;
}
/*
* Preprocess:
* Copy the input (bytewise) array into a wordwise array.
* Find the longest run of 0x00's in src[] for :: shorthanding.
*/
for (i = 0; i < 16; i += 2) {
words[i / 2] = (src[i+1] << 0);
words[i / 2] |= (src[i] << 8);
}
best.base = -1; best.len = 0;
cur.base = -1; cur.len = 0;
for (i = 0; i < 8; i++) {
if (words[i] == 0) {
if (cur.base == -1) {
cur.base = i;
cur.len = 1;
} else
cur.len++;
} else {
if (cur.base != -1) {
if (best.base == -1 || cur.len > best.len)
best = cur;
cur.base = -1;
}
}
}
if (cur.base != -1) {
if (best.base == -1 || cur.len > best.len)
best = cur;
}
if (best.base != -1 && best.len < 2)
best.base = -1;
/* Is this address an encapsulated IPv4? */
/* XXX,
* Orginal code dated 1996 uses ::/96 as a valid IPv4-compatible addresses
* but since Feb 2006 ::/96 is deprecated one.
* Quoting wikipedia [0]:
* > The 96-bit zero-value prefix ::/96, originally known as IPv4-compatible
* > addresses, was mentioned in 1995[35] but first described in 1998.[41]
* > This class of addresses was used to represent IPv4 addresses within
* > an IPv6 transition technology. Such an IPv6 address has its first
* > (most significant) 96 bits set to zero, while its last 32 bits are the
* > IPv4 address that is represented.
* > In February 2006 the Internet Engineering Task Force (IETF) has deprecated
* > the use of IPv4-compatible addresses.[1] The only remaining use of this address
* > format is to represent an IPv4 address in a table or database with fixed size
* > members that must also be able to store an IPv6 address.
*
* If needed it can be fixed by changing next line:
* if (best.base == 0 && (best.len == 6 || (best.len == 5 && words[5] == 0xffff)))
* to:
* if (best.base == 0 && best.len == 5 && words[5] == 0xffff)
*
* [0] http://en.wikipedia.org/wiki/IPv6_address#Historical_notes
*/
if (best.base == 0 && (best.len == 6 || (best.len == 5 && words[5] == 0xffff)))
{
/* best.len == 6 -> ::IPv4; 5 -> ::ffff:IPv4 */
buf = g_stpcpy(buf, "::");
if (best.len == 5)
buf = g_stpcpy(buf, "ffff:");
ip_to_str_buf(src + 12, buf, MAX_IP_STR_LEN);
/* max: 2 + 5 + 16 == 23 bytes */
return;
}
/*
* Format the result.
*/
for (i = 0; i < 8; i++) {
/* Are we inside the best run of 0x00's? */
if (i == best.base) {
*buf++ = ':';
i += best.len;
/* Was it a trailing run of 0x00's? */
if (i == 8) {
*buf++ = ':';
break;
}
}
/* Are we following an initial run of 0x00s or any real hex? */
if (i != 0)
*buf++ = ':';
buf = word_to_hex_npad(buf, words[i]); /* max: 4B */
/* max: 8 * 4 + 7 == 39 bytes */
}
*buf = '\0'; /* 40 byte */
}
void
ip6_to_str_buf(const struct e_in6_addr *ad, gchar *buf)
{
ip6_to_str_buf_len((const guchar*)ad, buf, MAX_IP6_STR_LEN);
}
gchar*
ipx_addr_to_str(const guint32 net, const guint8 *ad)
{
gchar *buf;
char *name;
name = get_ether_name_if_known(ad);
if (name) {
buf = wmem_strdup_printf(wmem_packet_scope(), "%s.%s", get_ipxnet_name(wmem_packet_scope(), net), name);
}
else {
buf = wmem_strdup_printf(wmem_packet_scope(), "%s.%s", get_ipxnet_name(wmem_packet_scope(), net),
bytestring_to_str(wmem_packet_scope(), ad, 6, '\0'));
}
return buf;
}
gchar *
ipxnet_to_str_punct(wmem_allocator_t *scope, const guint32 ad, const char punct)
{
gchar *buf = (gchar *)wmem_alloc(scope, 12);
*dword_to_hex_punct(buf, ad, punct) = '\0';
return buf;
}
/*
This function is very fast and this function is called a lot.
XXX update the address_to_str stuff to use this function.
*/
gchar *
eui64_to_str(wmem_allocator_t *scope, const guint64 ad) {
gchar *buf;
guint8 *p_eui64;
p_eui64=(guint8 *)wmem_alloc(scope, 8);
buf=(gchar *)wmem_alloc(scope, EUI64_STR_LEN);
/* Copy and convert the address to network byte order. */
*(guint64 *)(void *)(p_eui64) = pntoh64(&(ad));
g_snprintf(buf, EUI64_STR_LEN, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
p_eui64[0], p_eui64[1], p_eui64[2], p_eui64[3],
p_eui64[4], p_eui64[5], p_eui64[6], p_eui64[7] );
return buf;
}
gchar*
tvb_address_to_str(wmem_allocator_t *scope, tvbuff_t *tvb, address_type type, const gint offset)
{
address addr;
addr.type = type;
addr.hf = -1;
switch(type)
{
case AT_NONE:
addr.len = 0;
break;
case AT_ETHER:
addr.len = 6;
break;
case AT_IPv4:
addr.len = IPV4_LENGTH;
break;
case AT_IPv6:
addr.len = IPV6_LENGTH;
break;
case AT_IPX:
addr.len = 10;
break;
case AT_FC:
addr.len = 3;
break;
case AT_VINES:
addr.len = VINES_ADDR_LEN;
break;
case AT_FCWWN:
addr.len = FCWWN_ADDR_LEN;
break;
case AT_EUI64:
addr.len = 8;
break;
case AT_AX25:
addr.len = AX25_ADDR_LEN;
break;
case AT_SS7PC:
case AT_STRINGZ:
case AT_IB:
/* Have variable length fields, use tvb_address_var_to_str() */
case AT_USB:
/* These addresses are not supported through tvb accessor */
default:
/* XXX - Removed because of dynamic address type range
XXX - Should we check that range?
g_assert_not_reached();
return NULL;
*/
break;
}
switch (addr.len) {
case 0:
addr.data = NULL;
break;
case 1:
addr.data = GUINT_TO_POINTER((guint)tvb_get_guint8(tvb, offset));
break;
default:
addr.data = tvb_get_ptr(tvb, offset, addr.len);
break;
}
return address_to_str(scope, &addr);
}
gchar* tvb_address_var_to_str(wmem_allocator_t *scope, tvbuff_t *tvb, address_type type, const gint offset, int length)
{
address addr;
TVB_SET_ADDRESS(&addr, type, tvb, offset, length);
return address_to_str(scope, &addr);
}
/*XXX FIXME the code below may be called very very frequently in the future.
optimize it for speed and get rid of the slow sprintfs */
/* XXX - perhaps we should have individual address types register
a table of routines to do operations such as address-to-name translation,
address-to-string translation, and the like, and have this call them,
and also have an address-to-string-with-a-name routine */
/* XXX - use this, and that future address-to-string-with-a-name routine,
in "col_set_addr()"; it might also be useful to have address types
export the names of the source and destination address fields, so
that "col_set_addr()" need know nothing whatsoever about particular
address types */
/* convert an address struct into a printable string */
gchar*
address_to_str(wmem_allocator_t *scope, const address *addr)
{
gchar *str;
int len = address_type_get_length(addr);
if (len <= 0)
len = MAX_ADDR_STR_LEN;
str=(gchar *)wmem_alloc(scope, len);
address_to_str_buf(addr, str, len);
return str;
}
void
address_to_str_buf(const address *addr, gchar *buf, int buf_len)
{
/* XXX - Keep this here for now to save changing all of the include headers */
address_type_to_string(addr, buf, buf_len);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
View Git Blame Copy Permalink