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filter.c
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filter.c
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/* Route filtering function.
* Copyright (C) 1998, 1999 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2, or (at your
* option) any later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <zebra.h>
#include "prefix.h"
#include "filter.h"
#include "memory.h"
#include "command.h"
#include "sockunion.h"
#include "buffer.h"
#include "log.h"
struct filter_cisco
{
/* Cisco access-list */
int extended;
struct in_addr addr;
struct in_addr addr_mask;
struct in_addr mask;
struct in_addr mask_mask;
};
struct filter_zebra
{
/* If this filter is "exact" match then this flag is set. */
int exact;
/* Prefix information. */
struct prefix prefix;
};
/* Filter element of access list */
struct filter
{
/* For doubly linked list. */
struct filter *next;
struct filter *prev;
/* Filter type information. */
enum filter_type type;
/* Cisco access-list */
int cisco;
union
{
struct filter_cisco cfilter;
struct filter_zebra zfilter;
} u;
};
/* List of access_list. */
struct access_list_list
{
struct access_list *head;
struct access_list *tail;
};
/* Master structure of access_list. */
struct access_master
{
/* List of access_list which name is number. */
struct access_list_list num;
/* List of access_list which name is string. */
struct access_list_list str;
/* Hook function which is executed when new access_list is added. */
void (*add_hook) (struct access_list *);
/* Hook function which is executed when access_list is deleted. */
void (*delete_hook) (struct access_list *);
};
/* Static structure for IPv4 access_list's master. */
static struct access_master access_master_ipv4 =
{
{NULL, NULL},
{NULL, NULL},
NULL,
NULL,
};
#ifdef HAVE_IPV6
/* Static structure for IPv6 access_list's master. */
static struct access_master access_master_ipv6 =
{
{NULL, NULL},
{NULL, NULL},
NULL,
NULL,
};
#endif /* HAVE_IPV6 */
static struct access_master *
access_master_get (afi_t afi)
{
if (afi == AFI_IP)
return &access_master_ipv4;
#ifdef HAVE_IPV6
else if (afi == AFI_IP6)
return &access_master_ipv6;
#endif /* HAVE_IPV6 */
return NULL;
}
/* Allocate new filter structure. */
static struct filter *
filter_new (void)
{
return (struct filter *) XCALLOC (MTYPE_ACCESS_FILTER,
sizeof (struct filter));
}
static void
filter_free (struct filter *filter)
{
XFREE (MTYPE_ACCESS_FILTER, filter);
}
/* Return string of filter_type. */
static const char *
filter_type_str (struct filter *filter)
{
switch (filter->type)
{
case FILTER_PERMIT:
return "permit";
break;
case FILTER_DENY:
return "deny";
break;
case FILTER_DYNAMIC:
return "dynamic";
break;
default:
return "";
break;
}
}
/* If filter match to the prefix then return 1. */
static int
filter_match_cisco (struct filter *mfilter, struct prefix *p)
{
struct filter_cisco *filter;
struct in_addr mask;
u_int32_t check_addr;
u_int32_t check_mask;
filter = &mfilter->u.cfilter;
check_addr = p->u.prefix4.s_addr & ~filter->addr_mask.s_addr;
if (filter->extended)
{
masklen2ip (p->prefixlen, &mask);
check_mask = mask.s_addr & ~filter->mask_mask.s_addr;
if (memcmp (&check_addr, &filter->addr.s_addr, 4) == 0
&& memcmp (&check_mask, &filter->mask.s_addr, 4) == 0)
return 1;
}
else if (memcmp (&check_addr, &filter->addr.s_addr, 4) == 0)
return 1;
return 0;
}
/* If filter match to the prefix then return 1. */
static int
filter_match_zebra (struct filter *mfilter, struct prefix *p)
{
struct filter_zebra *filter;
filter = &mfilter->u.zfilter;
if (filter->prefix.family == p->family)
{
if (filter->exact)
{
if (filter->prefix.prefixlen == p->prefixlen)
return prefix_match (&filter->prefix, p);
else
return 0;
}
else
return prefix_match (&filter->prefix, p);
}
else
return 0;
}
/* Allocate new access list structure. */
static struct access_list *
access_list_new (void)
{
return (struct access_list *) XCALLOC (MTYPE_ACCESS_LIST,
sizeof (struct access_list));
}
/* Free allocated access_list. */
static void
access_list_free (struct access_list *access)
{
XFREE (MTYPE_ACCESS_LIST, access);
}
/* Delete access_list from access_master and free it. */
static void
access_list_delete (struct access_list *access)
{
struct filter *filter;
struct filter *next;
struct access_list_list *list;
struct access_master *master;
for (filter = access->head; filter; filter = next)
{
next = filter->next;
filter_free (filter);
}
master = access->master;
if (access->type == ACCESS_TYPE_NUMBER)
list = &master->num;
else
list = &master->str;
if (access->next)
access->next->prev = access->prev;
else
list->tail = access->prev;
if (access->prev)
access->prev->next = access->next;
else
list->head = access->next;
if (access->name)
XFREE (MTYPE_ACCESS_LIST_STR, access->name);
if (access->remark)
XFREE (MTYPE_TMP, access->remark);
access_list_free (access);
}
/* Insert new access list to list of access_list. Each acceess_list
is sorted by the name. */
static struct access_list *
access_list_insert (afi_t afi, const char *name)
{
unsigned int i;
long number;
struct access_list *access;
struct access_list *point;
struct access_list_list *alist;
struct access_master *master;
master = access_master_get (afi);
if (master == NULL)
return NULL;
/* Allocate new access_list and copy given name. */
access = access_list_new ();
access->name = XSTRDUP (MTYPE_ACCESS_LIST_STR, name);
access->master = master;
/* If name is made by all digit character. We treat it as
number. */
for (number = 0, i = 0; i < strlen (name); i++)
{
if (isdigit ((int) name[i]))
number = (number * 10) + (name[i] - '0');
else
break;
}
/* In case of name is all digit character */
if (i == strlen (name))
{
access->type = ACCESS_TYPE_NUMBER;
/* Set access_list to number list. */
alist = &master->num;
for (point = alist->head; point; point = point->next)
if (atol (point->name) >= number)
break;
}
else
{
access->type = ACCESS_TYPE_STRING;
/* Set access_list to string list. */
alist = &master->str;
/* Set point to insertion point. */
for (point = alist->head; point; point = point->next)
if (strcmp (point->name, name) >= 0)
break;
}
/* In case of this is the first element of master. */
if (alist->head == NULL)
{
alist->head = alist->tail = access;
return access;
}
/* In case of insertion is made at the tail of access_list. */
if (point == NULL)
{
access->prev = alist->tail;
alist->tail->next = access;
alist->tail = access;
return access;
}
/* In case of insertion is made at the head of access_list. */
if (point == alist->head)
{
access->next = alist->head;
alist->head->prev = access;
alist->head = access;
return access;
}
/* Insertion is made at middle of the access_list. */
access->next = point;
access->prev = point->prev;
if (point->prev)
point->prev->next = access;
point->prev = access;
return access;
}
/* Lookup access_list from list of access_list by name. */
struct access_list *
access_list_lookup (afi_t afi, const char *name)
{
struct access_list *access;
struct access_master *master;
if (name == NULL)
return NULL;
master = access_master_get (afi);
if (master == NULL)
return NULL;
for (access = master->num.head; access; access = access->next)
if (strcmp (access->name, name) == 0)
return access;
for (access = master->str.head; access; access = access->next)
if (strcmp (access->name, name) == 0)
return access;
return NULL;
}
/* Get access list from list of access_list. If there isn't matched
access_list create new one and return it. */
static struct access_list *
access_list_get (afi_t afi, const char *name)
{
struct access_list *access;
access = access_list_lookup (afi, name);
if (access == NULL)
access = access_list_insert (afi, name);
return access;
}
/* Apply access list to object (which should be struct prefix *). */
enum filter_type
access_list_apply (struct access_list *access, void *object)
{
struct filter *filter;
struct prefix *p;
p = (struct prefix *) object;
if (access == NULL)
return FILTER_DENY;
for (filter = access->head; filter; filter = filter->next)
{
if (filter->cisco)
{
if (filter_match_cisco (filter, p))
return filter->type;
}
else
{
if (filter_match_zebra (filter, p))
return filter->type;
}
}
return FILTER_DENY;
}
/* Add hook function. */
void
access_list_add_hook (void (*func) (struct access_list *access))
{
access_master_ipv4.add_hook = func;
#ifdef HAVE_IPV6
access_master_ipv6.add_hook = func;
#endif /* HAVE_IPV6 */
}
/* Delete hook function. */
void
access_list_delete_hook (void (*func) (struct access_list *access))
{
access_master_ipv4.delete_hook = func;
#ifdef HAVE_IPV6
access_master_ipv6.delete_hook = func;
#endif /* HAVE_IPV6 */
}
/* Add new filter to the end of specified access_list. */
static void
access_list_filter_add (struct access_list *access, struct filter *filter)
{
filter->next = NULL;
filter->prev = access->tail;
if (access->tail)
access->tail->next = filter;
else
access->head = filter;
access->tail = filter;
/* Run hook function. */
if (access->master->add_hook)
(*access->master->add_hook) (access);
}
/* If access_list has no filter then return 1. */
static int
access_list_empty (struct access_list *access)
{
if (access->head == NULL && access->tail == NULL)
return 1;
else
return 0;
}
/* Delete filter from specified access_list. If there is hook
function execute it. */
static void
access_list_filter_delete (struct access_list *access, struct filter *filter)
{
struct access_master *master;
master = access->master;
if (filter->next)
filter->next->prev = filter->prev;
else
access->tail = filter->prev;
if (filter->prev)
filter->prev->next = filter->next;
else
access->head = filter->next;
filter_free (filter);
/* If access_list becomes empty delete it from access_master. */
if (access_list_empty (access))
access_list_delete (access);
/* Run hook function. */
if (master->delete_hook)
(*master->delete_hook) (access);
}
/*
deny Specify packets to reject
permit Specify packets to forward
dynamic ?
*/
/*
Hostname or A.B.C.D Address to match
any Any source host
host A single host address
*/
static struct filter *
filter_lookup_cisco (struct access_list *access, struct filter *mnew)
{
struct filter *mfilter;
struct filter_cisco *filter;
struct filter_cisco *new;
new = &mnew->u.cfilter;
for (mfilter = access->head; mfilter; mfilter = mfilter->next)
{
filter = &mfilter->u.cfilter;
if (filter->extended)
{
if (mfilter->type == mnew->type
&& filter->addr.s_addr == new->addr.s_addr
&& filter->addr_mask.s_addr == new->addr_mask.s_addr
&& filter->mask.s_addr == new->mask.s_addr
&& filter->mask_mask.s_addr == new->mask_mask.s_addr)
return mfilter;
}
else
{
if (mfilter->type == mnew->type
&& filter->addr.s_addr == new->addr.s_addr
&& filter->addr_mask.s_addr == new->addr_mask.s_addr)
return mfilter;
}
}
return NULL;
}
static struct filter *
filter_lookup_zebra (struct access_list *access, struct filter *mnew)
{
struct filter *mfilter;
struct filter_zebra *filter;
struct filter_zebra *new;
new = &mnew->u.zfilter;
for (mfilter = access->head; mfilter; mfilter = mfilter->next)
{
filter = &mfilter->u.zfilter;
if (filter->exact == new->exact
&& mfilter->type == mnew->type
&& prefix_same (&filter->prefix, &new->prefix))
return mfilter;
}
return NULL;
}
static int
vty_access_list_remark_unset (struct vty *vty, afi_t afi, const char *name)
{
struct access_list *access;
access = access_list_lookup (afi, name);
if (! access)
{
vty_out (vty, "%% access-list %s doesn't exist%s", name,
VTY_NEWLINE);
return CMD_WARNING;
}
if (access->remark)
{
XFREE (MTYPE_TMP, access->remark);
access->remark = NULL;
}
if (access->head == NULL && access->tail == NULL && access->remark == NULL)
access_list_delete (access);
return CMD_SUCCESS;
}
static int
filter_set_cisco (struct vty *vty, const char *name_str, const char *type_str,
const char *addr_str, const char *addr_mask_str,
const char *mask_str, const char *mask_mask_str,
int extended, int set)
{
int ret;
enum filter_type type;
struct filter *mfilter;
struct filter_cisco *filter;
struct access_list *access;
struct in_addr addr;
struct in_addr addr_mask;
struct in_addr mask;
struct in_addr mask_mask;
/* Check of filter type. */
if (strncmp (type_str, "p", 1) == 0)
type = FILTER_PERMIT;
else if (strncmp (type_str, "d", 1) == 0)
type = FILTER_DENY;
else
{
vty_out (vty, "%% filter type must be permit or deny%s", VTY_NEWLINE);
return CMD_WARNING;
}
ret = inet_aton (addr_str, &addr);
if (ret <= 0)
{
vty_out (vty, "%%Inconsistent address and mask%s",
VTY_NEWLINE);
return CMD_WARNING;
}
ret = inet_aton (addr_mask_str, &addr_mask);
if (ret <= 0)
{
vty_out (vty, "%%Inconsistent address and mask%s",
VTY_NEWLINE);
return CMD_WARNING;
}
if (extended)
{
ret = inet_aton (mask_str, &mask);
if (ret <= 0)
{
vty_out (vty, "%%Inconsistent address and mask%s",
VTY_NEWLINE);
return CMD_WARNING;
}
ret = inet_aton (mask_mask_str, &mask_mask);
if (ret <= 0)
{
vty_out (vty, "%%Inconsistent address and mask%s",
VTY_NEWLINE);
return CMD_WARNING;
}
}
mfilter = filter_new();
mfilter->type = type;
mfilter->cisco = 1;
filter = &mfilter->u.cfilter;
filter->extended = extended;
filter->addr.s_addr = addr.s_addr & ~addr_mask.s_addr;
filter->addr_mask.s_addr = addr_mask.s_addr;
if (extended)
{
filter->mask.s_addr = mask.s_addr & ~mask_mask.s_addr;
filter->mask_mask.s_addr = mask_mask.s_addr;
}
/* Install new filter to the access_list. */
access = access_list_get (AFI_IP, name_str);
if (set)
{
if (filter_lookup_cisco (access, mfilter))
filter_free (mfilter);
else
access_list_filter_add (access, mfilter);
}
else
{
struct filter *delete_filter;
delete_filter = filter_lookup_cisco (access, mfilter);
if (delete_filter)
access_list_filter_delete (access, delete_filter);
filter_free (mfilter);
}
return CMD_SUCCESS;
}
/* Standard access-list */
DEFUN (access_list_standard,
access_list_standard_cmd,
"access-list (<1-99>|<1300-1999>) (deny|permit) A.B.C.D A.B.C.D",
"Add an access list entry\n"
"IP standard access list\n"
"IP standard access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Address to match\n"
"Wildcard bits\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2], argv[3],
NULL, NULL, 0, 1);
}
DEFUN (access_list_standard_nomask,
access_list_standard_nomask_cmd,
"access-list (<1-99>|<1300-1999>) (deny|permit) A.B.C.D",
"Add an access list entry\n"
"IP standard access list\n"
"IP standard access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Address to match\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2], "0.0.0.0",
NULL, NULL, 0, 1);
}
DEFUN (access_list_standard_host,
access_list_standard_host_cmd,
"access-list (<1-99>|<1300-1999>) (deny|permit) host A.B.C.D",
"Add an access list entry\n"
"IP standard access list\n"
"IP standard access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"A single host address\n"
"Address to match\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2], "0.0.0.0",
NULL, NULL, 0, 1);
}
DEFUN (access_list_standard_any,
access_list_standard_any_cmd,
"access-list (<1-99>|<1300-1999>) (deny|permit) any",
"Add an access list entry\n"
"IP standard access list\n"
"IP standard access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any source host\n")
{
return filter_set_cisco (vty, argv[0], argv[1], "0.0.0.0",
"255.255.255.255", NULL, NULL, 0, 1);
}
DEFUN (no_access_list_standard,
no_access_list_standard_cmd,
"no access-list (<1-99>|<1300-1999>) (deny|permit) A.B.C.D A.B.C.D",
NO_STR
"Add an access list entry\n"
"IP standard access list\n"
"IP standard access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Address to match\n"
"Wildcard bits\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2], argv[3],
NULL, NULL, 0, 0);
}
DEFUN (no_access_list_standard_nomask,
no_access_list_standard_nomask_cmd,
"no access-list (<1-99>|<1300-1999>) (deny|permit) A.B.C.D",
NO_STR
"Add an access list entry\n"
"IP standard access list\n"
"IP standard access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Address to match\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2], "0.0.0.0",
NULL, NULL, 0, 0);
}
DEFUN (no_access_list_standard_host,
no_access_list_standard_host_cmd,
"no access-list (<1-99>|<1300-1999>) (deny|permit) host A.B.C.D",
NO_STR
"Add an access list entry\n"
"IP standard access list\n"
"IP standard access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"A single host address\n"
"Address to match\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2], "0.0.0.0",
NULL, NULL, 0, 0);
}
DEFUN (no_access_list_standard_any,
no_access_list_standard_any_cmd,
"no access-list (<1-99>|<1300-1999>) (deny|permit) any",
NO_STR
"Add an access list entry\n"
"IP standard access list\n"
"IP standard access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any source host\n")
{
return filter_set_cisco (vty, argv[0], argv[1], "0.0.0.0",
"255.255.255.255", NULL, NULL, 0, 0);
}
/* Extended access-list */
DEFUN (access_list_extended,
access_list_extended_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip A.B.C.D A.B.C.D A.B.C.D A.B.C.D",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"Source address\n"
"Source wildcard bits\n"
"Destination address\n"
"Destination Wildcard bits\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2],
argv[3], argv[4], argv[5], 1 ,1);
}
DEFUN (access_list_extended_mask_any,
access_list_extended_mask_any_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip A.B.C.D A.B.C.D any",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"Source address\n"
"Source wildcard bits\n"
"Any destination host\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2],
argv[3], "0.0.0.0",
"255.255.255.255", 1, 1);
}
DEFUN (access_list_extended_any_mask,
access_list_extended_any_mask_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip any A.B.C.D A.B.C.D",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"Any source host\n"
"Destination address\n"
"Destination Wildcard bits\n")
{
return filter_set_cisco (vty, argv[0], argv[1], "0.0.0.0",
"255.255.255.255", argv[2],
argv[3], 1, 1);
}
DEFUN (access_list_extended_any_any,
access_list_extended_any_any_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip any any",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"Any source host\n"
"Any destination host\n")
{
return filter_set_cisco (vty, argv[0], argv[1], "0.0.0.0",
"255.255.255.255", "0.0.0.0",
"255.255.255.255", 1, 1);
}
DEFUN (access_list_extended_mask_host,
access_list_extended_mask_host_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip A.B.C.D A.B.C.D host A.B.C.D",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"Source address\n"
"Source wildcard bits\n"
"A single destination host\n"
"Destination address\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2],
argv[3], argv[4],
"0.0.0.0", 1, 1);
}
DEFUN (access_list_extended_host_mask,
access_list_extended_host_mask_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip host A.B.C.D A.B.C.D A.B.C.D",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"A single source host\n"
"Source address\n"
"Destination address\n"
"Destination Wildcard bits\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2],
"0.0.0.0", argv[3],
argv[4], 1, 1);
}
DEFUN (access_list_extended_host_host,
access_list_extended_host_host_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip host A.B.C.D host A.B.C.D",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"A single source host\n"
"Source address\n"
"A single destination host\n"
"Destination address\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2],
"0.0.0.0", argv[3],
"0.0.0.0", 1, 1);
}
DEFUN (access_list_extended_any_host,
access_list_extended_any_host_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip any host A.B.C.D",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"Any source host\n"
"A single destination host\n"
"Destination address\n")
{
return filter_set_cisco (vty, argv[0], argv[1], "0.0.0.0",
"255.255.255.255", argv[2],
"0.0.0.0", 1, 1);
}
DEFUN (access_list_extended_host_any,
access_list_extended_host_any_cmd,
"access-list (<100-199>|<2000-2699>) (deny|permit) ip host A.B.C.D any",
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"A single source host\n"
"Source address\n"
"Any destination host\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2],
"0.0.0.0", "0.0.0.0",
"255.255.255.255", 1, 1);
}
DEFUN (no_access_list_extended,
no_access_list_extended_cmd,
"no access-list (<100-199>|<2000-2699>) (deny|permit) ip A.B.C.D A.B.C.D A.B.C.D A.B.C.D",
NO_STR
"Add an access list entry\n"
"IP extended access list\n"
"IP extended access list (expanded range)\n"
"Specify packets to reject\n"
"Specify packets to forward\n"
"Any Internet Protocol\n"
"Source address\n"
"Source wildcard bits\n"
"Destination address\n"
"Destination Wildcard bits\n")
{
return filter_set_cisco (vty, argv[0], argv[1], argv[2],
argv[3], argv[4], argv[5], 1, 0);
}