forked from osmocom/wireshark
55a6251e7c
New "matches" operater in display filter language. Uses PCRE. If a "matches" operator is found in a dfilter while libpcre has not been used to build the binary, then an exception is thrown after using dfilter_fail() to set an apporporiate error message. svn path=/trunk/; revision=9182
818 lines
16 KiB
C
818 lines
16 KiB
C
/*
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* $Id: ftype-bytes.c,v 1.19 2003/12/06 16:35:19 gram Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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 <ftypes-int.h>
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#include <string.h>
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#include <ctype.h>
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#include <epan/resolv.h>
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#include <epan/strutil.h>
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#include <epan/int-64bit.h>
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#define ETHER_LEN 6
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#define IPv6_LEN 16
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#define U64_LEN 8
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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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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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/* 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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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, 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, IPv6_LEN);
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}
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static void
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u64_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, U64_LEN);
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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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is_byte_sep(guint8 c)
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{
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return (c == '-' || c == ':' || c == '.');
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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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guint8 val;
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guchar *p, *q, *punct;
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char two_digits[3];
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char one_digit[2];
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gboolean fail = FALSE;
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bytes = g_byte_array_new();
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p = (guchar *)s;
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while (*p) {
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q = p+1;
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if (*q && isxdigit(*p) && isxdigit(*q)) {
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two_digits[0] = *p;
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two_digits[1] = *q;
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two_digits[2] = '\0';
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/*
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* Two or more hex digits in a row.
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* "strtoul()" will succeed, as it'll see at
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* least one hex digit.
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*/
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val = (guint8) strtoul(two_digits, NULL, 16);
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g_byte_array_append(bytes, &val, 1);
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punct = q + 1;
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if (*punct) {
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/*
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* Make sure the character after
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* the second hex digit is a byte
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* separator, i.e. that we don't have
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* more than two hex digits, or a
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* bogus character.
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*/
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if (is_byte_sep(*punct)) {
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p = punct + 1;
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continue;
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}
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else {
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fail = TRUE;
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break;
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}
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}
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else {
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p = punct;
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continue;
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}
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}
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else if (*q && isxdigit(*p) && is_byte_sep(*q)) {
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one_digit[0] = *p;
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one_digit[1] = '\0';
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/*
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* Only one hex digit.
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* "strtoul()" will succeed, as it'll see that
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* hex digit.
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*/
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val = (guint8) strtoul(one_digit, NULL, 16);
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g_byte_array_append(bytes, &val, 1);
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p = q + 1;
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continue;
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}
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else if (!*q && isxdigit(*p)) {
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one_digit[0] = *p;
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one_digit[1] = '\0';
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/*
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* Only one hex digit.
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* "strtoul()" will succeed, as it'll see that
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* hex digit.
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*/
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val = (guint8) strtoul(one_digit, NULL, 16);
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g_byte_array_append(bytes, &val, 1);
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p = q;
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continue;
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}
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else {
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fail = TRUE;
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break;
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}
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}
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if (fail) {
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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 > 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 < 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 gboolean
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u64_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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guint8 buffer[8];
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if (atou64(s, buffer) == NULL) {
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logfunc("\"%s\" is not a valid integer", s);
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return FALSE;
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}
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u64_fvalue_set(fv, buffer, FALSE);
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return TRUE;
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}
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static gboolean
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i64_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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guint8 buffer[8];
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if (atoi64(s, buffer) == NULL) {
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logfunc("\"%s\" is not a valid integer", s);
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return FALSE;
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}
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u64_fvalue_set(fv, buffer, FALSE);
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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 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_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_gt_i64(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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if ((a->data[0] & 0x80) == 0) {
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/*
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* "a" is positive.
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*/
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if (b->data[0] & 0x80) {
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/*
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* "b" is negative, so a > b.
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*/
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return TRUE;
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}
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} else {
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/*
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* "a" is negative.
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*/
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if ((b->data[0] & 0x80) == 0) {
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/*
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* "b" is positive, so a < b.
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*/
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return FALSE;
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}
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}
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/*
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* "a" and "b" have the same sign, so "memcmp()" should
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* give the right answer.
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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_i64(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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if ((a->data[0] & 0x80) == 0) {
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/*
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* "a" is positive.
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*/
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if (b->data[0] & 0x80) {
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/*
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* "b" is negative, so a > b.
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*/
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return TRUE;
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}
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} else {
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/*
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* "a" is negative.
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*/
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if ((b->data[0] & 0x80) == 0) {
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/*
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* "b" is positive, so a < b.
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*/
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return FALSE;
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}
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}
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/*
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* "a" and "b" have the same sign, so "memcmp()" should
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* give the right answer.
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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_i64(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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if (a->data[0] & 0x80) {
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/*
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* "a" is negative.
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*/
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if ((b->data[0] & 0x80) == 0) {
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/*
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* "b" is positive, so a < b.
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*/
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return TRUE;
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}
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} else {
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/*
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* "a" is positive.
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*/
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if (b->data[0] & 0x80) {
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/*
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* "b" is negative, so a > b.
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*/
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return FALSE;
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}
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}
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/*
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* "a" and "b" have the same sign, so "memcmp()" should
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* give the right answer.
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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_i64(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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if (a->data[0] & 0x80) {
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/*
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|
* "a" is negative.
|
|
*/
|
|
if ((b->data[0] & 0x80) == 0) {
|
|
/*
|
|
* "b" is positive, so a < b.
|
|
*/
|
|
return TRUE;
|
|
}
|
|
} else {
|
|
/*
|
|
* "a" is positive.
|
|
*/
|
|
if (b->data[0] & 0x80) {
|
|
/*
|
|
* "b" is negative, so a > b.
|
|
*/
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* "a" and "b" have the same sign, so "memcmp()" should
|
|
* give the right answer.
|
|
*/
|
|
return (memcmp(a->data, b->data, a->len) <= 0);
|
|
}
|
|
|
|
static gboolean
|
|
cmp_contains(fvalue_t *fv_a, fvalue_t *fv_b)
|
|
{
|
|
GByteArray *a = fv_a->value.bytes;
|
|
GByteArray *b = fv_b->value.bytes;
|
|
|
|
if (epan_memmem(a->data, a->len, b->data, b->len)) {
|
|
return TRUE;
|
|
}
|
|
else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
void
|
|
ftype_register_bytes(void)
|
|
{
|
|
|
|
static ftype_t bytes_type = {
|
|
"FT_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_integer */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_integer */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_contains,
|
|
NULL, /* cmp_matches */
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t uint_bytes_type = {
|
|
"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_integer */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_integer */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_contains,
|
|
NULL, /* cmp_matches */
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t ether_type = {
|
|
"FT_ETHER", /* name */
|
|
"Ethernet or other MAC address",/* pretty_name */
|
|
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_integer */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_integer */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_contains,
|
|
NULL, /* cmp_matches */
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t ipv6_type = {
|
|
"FT_IPv6", /* name */
|
|
"IPv6 address", /* pretty_name */
|
|
IPv6_LEN, /* wire_size */
|
|
bytes_fvalue_new, /* new_value */
|
|
bytes_fvalue_free, /* free_value */
|
|
ipv6_from_unparsed, /* val_from_unparsed */
|
|
NULL, /* val_from_string */
|
|
NULL, /* val_to_string_repr */
|
|
NULL, /* len_string_repr */
|
|
|
|
ipv6_fvalue_set, /* set_value */
|
|
NULL, /* set_value_integer */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_integer */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
cmp_contains,
|
|
NULL, /* cmp_matches */
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t u64_type = {
|
|
"FT_UINT64", /* name */
|
|
"Unsigned 64-bit integer", /* pretty_name */
|
|
U64_LEN, /* wire_size */
|
|
bytes_fvalue_new, /* new_value */
|
|
bytes_fvalue_free, /* free_value */
|
|
u64_from_unparsed, /* val_from_unparsed */
|
|
NULL, /* val_from_string */
|
|
NULL, /* val_to_string_repr */
|
|
NULL, /* len_string_repr */
|
|
|
|
u64_fvalue_set, /* set_value */
|
|
NULL, /* set_value_integer */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_integer */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt,
|
|
cmp_ge,
|
|
cmp_lt,
|
|
cmp_le,
|
|
NULL, /* cmp_contains */
|
|
NULL, /* cmp_matches */
|
|
|
|
len,
|
|
slice,
|
|
};
|
|
|
|
static ftype_t i64_type = {
|
|
"FT_INT64", /* name */
|
|
"Signed 64-bit integer", /* pretty_name */
|
|
U64_LEN, /* wire_size */
|
|
bytes_fvalue_new, /* new_value */
|
|
bytes_fvalue_free, /* free_value */
|
|
i64_from_unparsed, /* val_from_unparsed */
|
|
NULL, /* val_from_string */
|
|
NULL, /* val_to_string_repr */
|
|
NULL, /* len_string_repr */
|
|
|
|
u64_fvalue_set, /* set_value */
|
|
NULL, /* set_value_integer */
|
|
NULL, /* set_value_floating */
|
|
|
|
value_get, /* get_value */
|
|
NULL, /* get_value_integer */
|
|
NULL, /* get_value_floating */
|
|
|
|
cmp_eq,
|
|
cmp_ne,
|
|
cmp_gt_i64,
|
|
cmp_ge_i64,
|
|
cmp_lt_i64,
|
|
cmp_le_i64,
|
|
NULL, /* 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_UINT64, &u64_type);
|
|
ftype_register(FT_INT64, &i64_type);
|
|
}
|