forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
indicating an invalid string, but not reporting the error to the user. svn path=/trunk/; revision=3098
429 lines
7.3 KiB
C
429 lines
7.3 KiB
C
/*
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* $Id: ftype-bytes.c,v 1.5 2001/03/03 00:33:24 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 2001 Gerald Combs
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*
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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 "resolv.h"
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#define ETHER_LEN 6
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#define IPv6_LEN 16
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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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}
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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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fv->value.bytes = value;
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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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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 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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val_from_string(fvalue_t *fv, char *s, LogFunc log)
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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 (log != NULL)
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log("\"%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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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_string(fvalue_t *fv, char *s, LogFunc log)
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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 (val_from_string(fv, s, NULL)) {
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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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log("\"%s\" is not a valid hostname or Ethernet address.", 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_string(fvalue_t *fv, char *s, LogFunc log)
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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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log("\"%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 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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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",
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"sequence of bytes",
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0,
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bytes_fvalue_new,
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bytes_fvalue_free,
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val_from_string,
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bytes_fvalue_set,
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NULL,
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NULL,
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value_get,
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NULL,
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NULL,
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cmp_eq,
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cmp_ne,
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cmp_gt,
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cmp_ge,
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cmp_lt,
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cmp_le,
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len,
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slice,
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};
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static ftype_t ether_type = {
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"FT_ETHER",
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"Ethernet or other MAC address",
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ETHER_LEN,
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bytes_fvalue_new,
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bytes_fvalue_free,
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ether_from_string,
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ether_fvalue_set,
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NULL,
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NULL,
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value_get,
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NULL,
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NULL,
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cmp_eq,
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cmp_ne,
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cmp_gt,
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cmp_ge,
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cmp_lt,
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cmp_le,
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len,
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slice,
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};
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static ftype_t ipv6_type = {
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"FT_IPv6",
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"IPv6 address",
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IPv6_LEN,
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bytes_fvalue_new,
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bytes_fvalue_free,
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ipv6_from_string,
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ipv6_fvalue_set,
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NULL,
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NULL,
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value_get,
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NULL,
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NULL,
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cmp_eq,
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cmp_ne,
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cmp_gt,
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cmp_ge,
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cmp_lt,
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cmp_le,
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len,
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slice,
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};
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ftype_register(FT_BYTES, &bytes_type);
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ftype_register(FT_ETHER, ðer_type);
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ftype_register(FT_IPv6, &ipv6_type);
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}
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