forked from osmocom/wireshark
![Ronnie Sahlberg](/assets/img/avatar_default.png)
this primarily removes code and simplifies (==eliminates) the need to track the data that is allocated and should potentially be slightly faster than a slab allocator. however these functions are called A LOT so there might be a performance hit when using emem with full debugging canary values and all the bells and whistles activated. this change also makes any future attempt to parallellize dissection of frames easier if we just make the ep allocator allocate from a threads specific ep pool. (something we would have to do anyway to make ep allocations multithreaded) this works in all my tests so far but needs more test coverage. svn path=/trunk/; revision=20194
238 lines
5.1 KiB
C
238 lines
5.1 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 <string.h>
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#include <ftypes-int.h>
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#include <epan/ipv4.h>
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#include <epan/addr_resolv.h>
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static void
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set_integer(fvalue_t *fv, guint32 value)
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{
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ipv4_addr_set_net_order_addr(&(fv->value.ipv4), value);
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ipv4_addr_set_netmask_bits(&(fv->value.ipv4), 32);
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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.ipv4);
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}
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static gboolean
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val_from_unparsed(fvalue_t *fv, char *s, gboolean allow_partial_value _U_, LogFunc logfunc)
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{
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guint32 addr;
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unsigned int nmask_bits;
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char *has_slash, *s_copy = NULL;
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char *net_str, *addr_str;
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fvalue_t *nmask_fvalue;
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/* Look for CIDR: Is there a single slash in the string? */
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has_slash = strchr(s, '/');
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if (has_slash) {
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/* Make a copy of the string and use strtok() to
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* get the address portion. */
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s_copy = g_strdup(s);
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addr_str = strtok(s_copy, "/");
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/* I just checked for slash! I shouldn't get NULL here.
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* Double check just in case. */
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if (!addr_str) {
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logfunc("Unexpected strtok() error parsing IP address: %s",
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s_copy);
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g_free(s_copy);
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return FALSE;
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}
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}
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else {
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addr_str = s;
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}
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if (!get_host_ipaddr(addr_str, &addr)) {
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logfunc("\"%s\" is not a valid hostname or IPv4 address.",
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addr_str);
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if (has_slash) {
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g_free(s_copy);
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}
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return FALSE;
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}
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ipv4_addr_set_host_order_addr(&(fv->value.ipv4), addr);
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/* If CIDR, get netmask bits. */
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if (has_slash) {
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net_str = strtok(NULL, "/");
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/* I checked for slash! I shouldn't get NULL here.
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* Double check just in case. */
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if (!net_str) {
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logfunc("Unexpected strtok() error parsing netmask: %s",
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s_copy);
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g_free(s_copy);
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return FALSE;
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}
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/* XXX - this is inefficient */
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nmask_fvalue = fvalue_from_unparsed(FT_UINT32, net_str, FALSE, logfunc);
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g_free(s_copy);
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if (!nmask_fvalue) {
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return FALSE;
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}
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nmask_bits = fvalue_get_integer(nmask_fvalue);
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if (nmask_bits > 32) {
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logfunc("Netmask bits in a CIDR IPv4 address should be <= 32, not %u",
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nmask_bits);
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return FALSE;
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}
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ipv4_addr_set_netmask_bits(&fv->value.ipv4, nmask_bits);
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}
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else {
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/* Not CIDR; mask covers entire address. */
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ipv4_addr_set_netmask_bits(&(fv->value.ipv4), 32);
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}
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return TRUE;
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}
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static int
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val_repr_len(fvalue_t *fv _U_, ftrepr_t rtype _U_)
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{
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/*
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* 15 characters for "XXX.XXX.XXX.XXX".
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*/
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return 15;
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}
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static void
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val_to_repr(fvalue_t *fv, ftrepr_t rtype _U_, char *buf)
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{
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ipv4_addr_str_buf(&fv->value.ipv4, buf);
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}
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static gboolean
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cmp_eq(fvalue_t *a, fvalue_t *b)
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{
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return ipv4_addr_eq(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_ne(fvalue_t *a, fvalue_t *b)
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{
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return ipv4_addr_ne(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_gt(fvalue_t *a, fvalue_t *b)
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{
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return ipv4_addr_gt(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_ge(fvalue_t *a, fvalue_t *b)
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{
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return ipv4_addr_ge(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_lt(fvalue_t *a, fvalue_t *b)
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{
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return ipv4_addr_lt(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean
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cmp_le(fvalue_t *a, fvalue_t *b)
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{
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return ipv4_addr_le(&a->value.ipv4, &b->value.ipv4);
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}
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static gboolean cmp_bytes_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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i++;
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else
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return FALSE;
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}
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return TRUE;
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}
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void
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ftype_register_ipv4(void)
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{
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static ftype_t ipv4_type = {
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FT_IPv4, /* ftype */
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"FT_IPv4", /* name */
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"IPv4 address", /* pretty_name */
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4, /* wire_size */
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NULL, /* new_value */
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NULL, /* free_value */
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val_from_unparsed, /* val_from_unparsed */
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NULL, /* val_from_string */
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val_to_repr, /* val_to_string_repr */
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val_repr_len, /* len_string_repr */
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NULL, /* set_value */
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set_integer, /* set_value_integer */
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NULL, /* set_value_integer64 */
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NULL, /* set_value_floating */
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value_get, /* get_value */
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NULL, /* get_value_integer */
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NULL, /* get_value_integer64 */
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NULL, /* get_value_floating */
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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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cmp_bytes_bitwise_and,
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NULL, /* cmp_contains */
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NULL, /* cmp_matches */
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NULL,
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NULL,
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};
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ftype_register(FT_IPv4, &ipv4_type);
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}
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