![Gerald Combs](/assets/img/avatar_default.png)
in README.devloper. Remove g_gnuc.h since it's no longer needed. Remove tvbuff_init(), tvbuff_cleanup(), reassemble_init(), and reassemble_cleanup() since they were only used for older GLib versions which didn't support GSlices. Assume we always support the "matches" operator. svn path=/trunk/; revision=37978
735 lines
16 KiB
C
735 lines
16 KiB
C
/*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2001 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <ftypes-int.h>
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#include <string.h>
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#include <ctype.h>
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#include <epan/addr_resolv.h>
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#include <epan/strutil.h>
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#include <epan/oids.h>
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#ifdef HAVE_LIBPCRE
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# include <pcre.h>
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#endif
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#define CMP_MATCHES cmp_matches
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static void
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bytes_fvalue_new(fvalue_t *fv)
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{
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fv->value.bytes = NULL;
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}
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static void
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bytes_fvalue_free(fvalue_t *fv)
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{
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if (fv->value.bytes) {
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g_byte_array_free(fv->value.bytes, TRUE);
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fv->value.bytes=NULL;
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}
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}
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static void
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bytes_fvalue_set(fvalue_t *fv, gpointer value, gboolean already_copied)
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{
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g_assert(already_copied);
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/* Free up the old value, if we have one */
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bytes_fvalue_free(fv);
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fv->value.bytes = value;
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}
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static int
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bytes_repr_len(fvalue_t *fv, ftrepr_t rtype _U_)
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{
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if (fv->value.bytes->len == 0) {
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/* Empty array of bytes, so the representation
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* is an empty string. */
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return 0;
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} else {
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/* 3 bytes for each byte of the byte "NN:" minus 1 byte
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* as there's no trailing ":". */
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return fv->value.bytes->len * 3 - 1;
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}
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}
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/*
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* OID_REPR_LEN:
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*
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* 5 for the first byte ([0-2].[0-39].)
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* for each extra byte if the sub-id is:
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* 1 byte it can be at most "127." (4 bytes we give it 4)
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* 2 bytes it can be at most "16383." (6 bytes we give it 8)
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* 3 bytes it can be at most "2097151." (8 bytes we give it 12)
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* 4 bytes it can be at most "268435456." (10 bytes we give it 16)
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* 5 bytes it can be at most "34359738368." (12 bytes we give it 20)
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*
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* a 5 bytes encoded subid can already overflow the guint32 that holds a sub-id,
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* making it a completely different issue!
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*/
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#define OID_REPR_LEN(fv) (5 + (4 * ((fv)->value.bytes->len-1)))
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static int
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oid_repr_len(fvalue_t *fv _U_, ftrepr_t rtype _U_)
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{
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return OID_REPR_LEN(fv);
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}
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static void
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oid_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
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{
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const char* oid_str = oid_encoded2string(fv->value.bytes->data,fv->value.bytes->len);
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/*
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* XXX:
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* I'm assuming that oid_repr_len is going to be called before to set buf's size.
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* or else we might have a BO.
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* I guess that is why this callback is not passed a length.
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* -- lego
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*/
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strncpy(buf,oid_str,OID_REPR_LEN(fv));
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}
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static void
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bytes_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
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{
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guint8 *c;
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char *write_cursor;
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unsigned int i;
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c = fv->value.bytes->data;
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write_cursor = buf;
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for (i = 0; i < fv->value.bytes->len; i++) {
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if (i == 0) {
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sprintf(write_cursor, "%02x", *c++);
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write_cursor += 2;
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}
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else {
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sprintf(write_cursor, ":%02x", *c++);
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write_cursor += 3;
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}
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}
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}
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static void
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common_fvalue_set(fvalue_t *fv, guint8* data, guint len)
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{
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/* Free up the old value, if we have one */
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bytes_fvalue_free(fv);
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fv->value.bytes = g_byte_array_new();
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g_byte_array_append(fv->value.bytes, data, len);
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}
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static void
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ether_fvalue_set(fvalue_t *fv, gpointer value, gboolean already_copied)
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{
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g_assert(!already_copied);
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common_fvalue_set(fv, value, FT_ETHER_LEN);
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}
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static void
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ipv6_fvalue_set(fvalue_t *fv, gpointer value, gboolean already_copied)
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{
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g_assert(!already_copied);
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common_fvalue_set(fv, value, FT_IPv6_LEN);
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}
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static void
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oid_fvalue_set(fvalue_t *fv, gpointer value, gboolean already_copied)
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{
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g_assert(already_copied);
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/* Free up the old value, if we have one */
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bytes_fvalue_free(fv);
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fv->value.bytes = value;
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}
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static gpointer
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value_get(fvalue_t *fv)
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{
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return fv->value.bytes->data;
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}
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static gboolean
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bytes_from_string(fvalue_t *fv, char *s, LogFunc logfunc _U_)
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{
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GByteArray *bytes;
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bytes = g_byte_array_new();
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g_byte_array_append(bytes, (guint8 *)s, (guint)strlen(s));
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/* Free up the old value, if we have one */
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bytes_fvalue_free(fv);
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fv->value.bytes = bytes;
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return TRUE;
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}
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static gboolean
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bytes_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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GByteArray *bytes;
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gboolean res;
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bytes = g_byte_array_new();
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res = hex_str_to_bytes(s, bytes, TRUE);
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if (!res) {
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if (logfunc != NULL)
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logfunc("\"%s\" is not a valid byte string.", s);
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g_byte_array_free(bytes, TRUE);
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return FALSE;
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}
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/* Free up the old value, if we have one */
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bytes_fvalue_free(fv);
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fv->value.bytes = bytes;
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return TRUE;
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}
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static gboolean
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ether_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value, LogFunc logfunc)
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{
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guint8 *mac;
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/*
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* Don't log a message if this fails; we'll try looking it
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* up as an Ethernet host name if it does, and if that fails,
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* we'll log a message.
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*/
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if (bytes_from_unparsed(fv, s, TRUE, NULL)) {
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if (fv->value.bytes->len > FT_ETHER_LEN) {
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logfunc("\"%s\" contains too many bytes to be a valid Ethernet address.",
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s);
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return FALSE;
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}
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else if (fv->value.bytes->len < FT_ETHER_LEN && !allow_partial_value) {
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logfunc("\"%s\" contains too few bytes to be a valid Ethernet address.",
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s);
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return FALSE;
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}
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return TRUE;
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}
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mac = get_ether_addr(s);
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if (!mac) {
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logfunc("\"%s\" is not a valid hostname or Ethernet address.",
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s);
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return FALSE;
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}
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ether_fvalue_set(fv, mac, FALSE);
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return TRUE;
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}
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static gboolean
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ipv6_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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guint8 buffer[16];
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if (!get_host_ipaddr6(s, (struct e_in6_addr*)buffer)) {
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logfunc("\"%s\" is not a valid hostname or IPv6 address.", s);
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return FALSE;
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}
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ipv6_fvalue_set(fv, buffer, FALSE);
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return TRUE;
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}
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static int
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ipv6_repr_len(fvalue_t *fv _U_, ftrepr_t rtype _U_)
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{
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/*
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* 39 characters for "XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX".
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*/
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return 39;
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}
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static void
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ipv6_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
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{
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ip6_to_str_buf((struct e_in6_addr *)fv->value.bytes->data, buf);
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}
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static gboolean
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oid_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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GByteArray *bytes;
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gboolean res;
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/*
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* Don't log a message if this fails; we'll try looking it
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* up as an OID if it does, and if that fails,
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* we'll log a message.
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*/
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/* do not try it as '.' is handled as valid separator for hexbytes :(
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if (bytes_from_unparsed(fv, s, TRUE, NULL)) {
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return TRUE;
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}
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*/
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bytes = g_byte_array_new();
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res = oid_str_to_bytes(s, bytes);
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if (!res) {
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if (logfunc != NULL)
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logfunc("\"%s\" is not a valid OBJECT IDENTIFIER.", s);
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g_byte_array_free(bytes, TRUE);
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return FALSE;
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}
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/* Free up the old value, if we have one */
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bytes_fvalue_free(fv);
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fv->value.bytes = bytes;
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return TRUE;
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}
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static guint
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len(fvalue_t *fv)
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{
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return fv->value.bytes->len;
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}
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static void
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slice(fvalue_t *fv, GByteArray *bytes, guint offset, guint length)
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{
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guint8* data;
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data = fv->value.bytes->data + offset;
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g_byte_array_append(bytes, data, length);
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}
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static gboolean
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cmp_eq(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GByteArray *b = fv_b->value.bytes;
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if (a->len != b->len) {
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return FALSE;
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}
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return (memcmp(a->data, b->data, a->len) == 0);
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}
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static gboolean
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cmp_ne(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GByteArray *b = fv_b->value.bytes;
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if (a->len != b->len) {
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return TRUE;
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}
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return (memcmp(a->data, b->data, a->len) != 0);
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}
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static gboolean
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cmp_gt(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GByteArray *b = fv_b->value.bytes;
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if (a->len > b->len) {
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return TRUE;
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}
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if (a->len < b->len) {
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return FALSE;
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}
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return (memcmp(a->data, b->data, a->len) > 0);
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}
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static gboolean
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cmp_ge(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GByteArray *b = fv_b->value.bytes;
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if (a->len > b->len) {
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return TRUE;
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}
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if (a->len < b->len) {
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return FALSE;
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}
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return (memcmp(a->data, b->data, a->len) >= 0);
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}
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static gboolean
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cmp_lt(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GByteArray *b = fv_b->value.bytes;
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if (a->len < b->len) {
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return TRUE;
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}
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if (a->len > b->len) {
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return FALSE;
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}
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return (memcmp(a->data, b->data, a->len) < 0);
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}
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static gboolean
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cmp_le(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GByteArray *b = fv_b->value.bytes;
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if (a->len < b->len) {
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return TRUE;
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}
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if (a->len > b->len) {
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return FALSE;
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}
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return (memcmp(a->data, b->data, a->len) <= 0);
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}
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static gboolean
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cmp_bitwise_and(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GByteArray *b = fv_b->value.bytes;
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guint i = 0;
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unsigned char *p_a, *p_b;
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if (b->len != a->len) {
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return FALSE;
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}
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p_a = a->data;
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p_b = b->data;
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while (i < b->len) {
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if (p_a[i] & p_b[i])
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return TRUE;
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else
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i++;
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}
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return FALSE;
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}
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static gboolean
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cmp_contains(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GByteArray *b = fv_b->value.bytes;
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if (epan_memmem(a->data, a->len, b->data, b->len)) {
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return TRUE;
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}
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else {
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return FALSE;
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}
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}
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#ifdef HAVE_LIBPCRE
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static gboolean
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cmp_matches(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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pcre_tuple_t *pcre_t = fv_b->value.re;
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int options = 0;
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int rc;
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/* fv_b is always a FT_PCRE, otherwise the dfilter semcheck() would have
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* warned us. For the same reason (and because we're using g_malloc()),
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* fv_b->value.re is not NULL.
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*/
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if (strcmp(fv_b->ftype->name, "FT_PCRE") != 0) {
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return FALSE;
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}
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if (! pcre_t) {
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return FALSE;
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}
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rc = pcre_exec(
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pcre_t->re, /* Compiled PCRE */
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pcre_t->ex, /* PCRE extra from pcre_study() */
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a->data, /* The data to check for the pattern... */
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(int)a->len, /* ... and its length */
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0, /* Start offset within data */
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options, /* PCRE options */
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NULL, /* We are not interested in the matched string */
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0 /* of the pattern; only in success or failure. */
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);
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/* NOTE - DO NOT g_free(data) */
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if (rc == 0) {
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return TRUE;
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}
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return FALSE;
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}
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#else /* GRegex */
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static gboolean
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cmp_matches(fvalue_t *fv_a, fvalue_t *fv_b)
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{
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GByteArray *a = fv_a->value.bytes;
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GRegex *regex = fv_b->value.re;
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/* fv_b is always a FT_PCRE, otherwise the dfilter semcheck() would have
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* warned us. For the same reason (and because we're using g_malloc()),
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* fv_b->value.re is not NULL.
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*/
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if (strcmp(fv_b->ftype->name, "FT_PCRE") != 0) {
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return FALSE;
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}
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if (! regex) {
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return FALSE;
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}
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return g_regex_match_full(
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regex, /* Compiled PCRE */
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a->data, /* The data to check for the pattern... */
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(int)a->len, /* ... and its length */
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0, /* Start offset within data */
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0, /* GRegexMatchFlags */
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NULL, /* We are not interested in the match information */
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NULL /* We don't want error information */
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);
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/* NOTE - DO NOT g_free(data) */
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}
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#endif /* HAVE_LIBPCRE / GRegex */
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void
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ftype_register_bytes(void)
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{
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static ftype_t bytes_type = {
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FT_BYTES, /* ftype */
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"FT_BYTES", /* name */
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"sequence of bytes", /* pretty_name */
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0, /* wire_size */
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|
bytes_fvalue_new, /* new_value */
|
|
bytes_fvalue_free, /* free_value */
|
|
bytes_from_unparsed, /* val_from_unparsed */
|
|
bytes_from_string, /* val_from_string */
|
|
bytes_to_repr, /* val_to_string_repr */
|
|
bytes_repr_len, /* len_string_repr */
|
|
|
|
bytes_fvalue_set, /* set_value */
|
|
NULL, /* set_value_uinteger */
|
|
NULL, /* set_value_sinteger */
|
|
NULL, /* set_value_integer64 */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_uinteger */
|
|
NULL, /* get_value_sinteger */
|
|
NULL, /* get_value_integer64 */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_bitwise_and,
|
|
cmp_contains,
|
|
CMP_MATCHES,
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t uint_bytes_type = {
|
|
FT_UINT_BYTES, /* ftype */
|
|
"FT_UINT_BYTES", /* name */
|
|
"sequence of bytes", /* pretty_name */
|
|
0, /* wire_size */
|
|
bytes_fvalue_new, /* new_value */
|
|
bytes_fvalue_free, /* free_value */
|
|
bytes_from_unparsed, /* val_from_unparsed */
|
|
NULL, /* val_from_string */
|
|
bytes_to_repr, /* val_to_string_repr */
|
|
bytes_repr_len, /* len_string_repr */
|
|
|
|
bytes_fvalue_set, /* set_value */
|
|
NULL, /* set_value_uinteger */
|
|
NULL, /* set_value_sinteger */
|
|
NULL, /* set_value_integer64 */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_uinteger */
|
|
NULL, /* get_value_sinteger */
|
|
NULL, /* get_value_integer64 */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_bitwise_and,
|
|
cmp_contains,
|
|
NULL, /* cmp_matches */
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t ether_type = {
|
|
FT_ETHER, /* ftype */
|
|
"FT_ETHER", /* name */
|
|
"Ethernet or other MAC address",/* pretty_name */
|
|
FT_ETHER_LEN, /* wire_size */
|
|
bytes_fvalue_new, /* new_value */
|
|
bytes_fvalue_free, /* free_value */
|
|
ether_from_unparsed, /* val_from_unparsed */
|
|
NULL, /* val_from_string */
|
|
bytes_to_repr, /* val_to_string_repr */
|
|
bytes_repr_len, /* len_string_repr */
|
|
|
|
ether_fvalue_set, /* set_value */
|
|
NULL, /* set_value_uinteger */
|
|
NULL, /* set_value_sinteger */
|
|
NULL, /* set_value_integer64 */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_uinteger */
|
|
NULL, /* get_value_sinteger */
|
|
NULL, /* get_value_integer64 */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_bitwise_and,
|
|
cmp_contains,
|
|
CMP_MATCHES,
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t ipv6_type = {
|
|
FT_IPv6, /* ftype */
|
|
"FT_IPv6", /* name */
|
|
"IPv6 address", /* pretty_name */
|
|
FT_IPv6_LEN, /* wire_size */
|
|
bytes_fvalue_new, /* new_value */
|
|
bytes_fvalue_free, /* free_value */
|
|
ipv6_from_unparsed, /* val_from_unparsed */
|
|
NULL, /* val_from_string */
|
|
ipv6_to_repr, /* val_to_string_repr */
|
|
ipv6_repr_len, /* len_string_repr */
|
|
|
|
ipv6_fvalue_set, /* set_value */
|
|
NULL, /* set_value_uinteger */
|
|
NULL, /* set_value_sinteger */
|
|
NULL, /* set_value_integer64 */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_uinteger */
|
|
NULL, /* get_value_sinteger */
|
|
NULL, /* get_value_integer64 */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_bitwise_and,
|
|
cmp_contains,
|
|
NULL, /* cmp_matches */
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t oid_type = {
|
|
FT_OID, /* ftype */
|
|
"FT_OID", /* name */
|
|
"OBJECT IDENTIFIER", /* pretty_name */
|
|
0, /* wire_size */
|
|
bytes_fvalue_new, /* new_value */
|
|
bytes_fvalue_free, /* free_value */
|
|
oid_from_unparsed, /* val_from_unparsed */
|
|
NULL, /* val_from_string */
|
|
oid_to_repr, /* val_to_string_repr */
|
|
oid_repr_len, /* len_string_repr */
|
|
|
|
oid_fvalue_set, /* set_value */
|
|
NULL, /* set_value_uinteger */
|
|
NULL, /* set_value_sinteger */
|
|
NULL, /* set_value_integer64 */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_uinteger */
|
|
NULL, /* get_value_sinteger */
|
|
NULL, /* get_value_integer64 */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_bitwise_and,
|
|
cmp_contains,
|
|
NULL, /* cmp_matches */
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
ftype_register(FT_BYTES, &bytes_type);
|
|
ftype_register(FT_UINT_BYTES, &uint_bytes_type);
|
|
ftype_register(FT_ETHER, ðer_type);
|
|
ftype_register(FT_IPv6, &ipv6_type);
|
|
ftype_register(FT_OID, &oid_type);
|
|
}
|