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/* RIP offset-list
* Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
*
* 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 "if.h"
#include "prefix.h"
#include "filter.h"
#include "command.h"
#include "linklist.h"
#include "memory.h"
#include "ripd/ripd.h"
#define RIP_OFFSET_LIST_IN 0
#define RIP_OFFSET_LIST_OUT 1
#define RIP_OFFSET_LIST_MAX 2
struct rip_offset_list
{
char *ifname;
struct
{
char *alist_name;
/* struct access_list *alist; */
int metric;
} direct[RIP_OFFSET_LIST_MAX];
};
static struct list *rip_offset_list_master;
static int
strcmp_safe (const char *s1, const char *s2)
{
if (s1 == NULL && s2 == NULL)
return 0;
if (s1 == NULL)
return -1;
if (s2 == NULL)
return 1;
return strcmp (s1, s2);
}
static struct rip_offset_list *
rip_offset_list_new (void)
{
struct rip_offset_list *new;
new = XMALLOC (MTYPE_RIP_OFFSET_LIST, sizeof (struct rip_offset_list));
memset (new, 0, sizeof (struct rip_offset_list));
return new;
}
static void
rip_offset_list_free (struct rip_offset_list *offset)
{
XFREE (MTYPE_RIP_OFFSET_LIST, offset);
}
static struct rip_offset_list *
rip_offset_list_lookup (const char *ifname)
{
struct rip_offset_list *offset;
struct listnode *node, *nnode;
for (ALL_LIST_ELEMENTS (rip_offset_list_master, node, nnode, offset))
{
if (strcmp_safe (offset->ifname, ifname) == 0)
return offset;
}
return NULL;
}
static struct rip_offset_list *
rip_offset_list_get (const char *ifname)
{
struct rip_offset_list *offset;
offset = rip_offset_list_lookup (ifname);
if (offset)
return offset;
offset = rip_offset_list_new ();
if (ifname)
offset->ifname = strdup (ifname);
listnode_add_sort (rip_offset_list_master, offset);
return offset;
}
static int
rip_offset_list_set (struct vty *vty, const char *alist, const char *direct_str,
const char *metric_str, const char *ifname)
{
int direct;
int metric;
struct rip_offset_list *offset;
/* Check direction. */
if (strncmp (direct_str, "i", 1) == 0)
direct = RIP_OFFSET_LIST_IN;
else if (strncmp (direct_str, "o", 1) == 0)
direct = RIP_OFFSET_LIST_OUT;
else
{
vty_out (vty, "Invalid direction: %s%s", direct_str, VTY_NEWLINE);
return CMD_WARNING;
}
/* Check metric. */
metric = atoi (metric_str);
if (metric < 0 || metric > 16)
{
vty_out (vty, "Invalid metric: %s%s", metric_str, VTY_NEWLINE);
return CMD_WARNING;
}
/* Get offset-list structure with interface name. */
offset = rip_offset_list_get (ifname);
if (offset->direct[direct].alist_name)
free (offset->direct[direct].alist_name);
offset->direct[direct].alist_name = strdup (alist);
offset->direct[direct].metric = metric;
return CMD_SUCCESS;
}
static int
rip_offset_list_unset (struct vty *vty, const char *alist,
const char *direct_str, const char *metric_str,
const char *ifname)
{
int direct;
int metric;
struct rip_offset_list *offset;
/* Check direction. */
if (strncmp (direct_str, "i", 1) == 0)
direct = RIP_OFFSET_LIST_IN;
else if (strncmp (direct_str, "o", 1) == 0)
direct = RIP_OFFSET_LIST_OUT;
else
{
vty_out (vty, "Invalid direction: %s%s", direct_str, VTY_NEWLINE);
return CMD_WARNING;
}
/* Check metric. */
metric = atoi (metric_str);
if (metric < 0 || metric > 16)
{
vty_out (vty, "Invalid metric: %s%s", metric_str, VTY_NEWLINE);
return CMD_WARNING;
}
/* Get offset-list structure with interface name. */
offset = rip_offset_list_lookup (ifname);
if (offset)
{
if (offset->direct[direct].alist_name)
free (offset->direct[direct].alist_name);
offset->direct[direct].alist_name = NULL;
if (offset->direct[RIP_OFFSET_LIST_IN].alist_name == NULL &&
offset->direct[RIP_OFFSET_LIST_OUT].alist_name == NULL)
{
listnode_delete (rip_offset_list_master, offset);
if (offset->ifname)
free (offset->ifname);
rip_offset_list_free (offset);
}
}
else
{
vty_out (vty, "Can't find offset-list%s", VTY_NEWLINE);
return CMD_WARNING;
}
return CMD_SUCCESS;
}
#define OFFSET_LIST_IN_NAME(O) ((O)->direct[RIP_OFFSET_LIST_IN].alist_name)
#define OFFSET_LIST_IN_METRIC(O) ((O)->direct[RIP_OFFSET_LIST_IN].metric)
#define OFFSET_LIST_OUT_NAME(O) ((O)->direct[RIP_OFFSET_LIST_OUT].alist_name)
#define OFFSET_LIST_OUT_METRIC(O) ((O)->direct[RIP_OFFSET_LIST_OUT].metric)
/* If metric is modifed return 1. */
int
rip_offset_list_apply_in (struct prefix_ipv4 *p, struct interface *ifp,
u_int32_t *metric)
{
struct rip_offset_list *offset;
struct access_list *alist;
/* Look up offset-list with interface name. */
offset = rip_offset_list_lookup (ifp->name);
if (offset && OFFSET_LIST_IN_NAME (offset))
{
alist = access_list_lookup (AFI_IP, OFFSET_LIST_IN_NAME (offset));
if (alist
&& access_list_apply (alist, (struct prefix *)p) == FILTER_PERMIT)
{
*metric += OFFSET_LIST_IN_METRIC (offset);
return 1;
}
return 0;
}
/* Look up offset-list without interface name. */
offset = rip_offset_list_lookup (NULL);
if (offset && OFFSET_LIST_IN_NAME (offset))
{
alist = access_list_lookup (AFI_IP, OFFSET_LIST_IN_NAME (offset));
if (alist
&& access_list_apply (alist, (struct prefix *)p) == FILTER_PERMIT)
{
*metric += OFFSET_LIST_IN_METRIC (offset);
return 1;
}
return 0;
}
return 0;
}
/* If metric is modifed return 1. */
int
rip_offset_list_apply_out (struct prefix_ipv4 *p, struct interface *ifp,
u_int32_t *metric)
{
struct rip_offset_list *offset;
struct access_list *alist;
/* Look up offset-list with interface name. */
offset = rip_offset_list_lookup (ifp->name);
if (offset && OFFSET_LIST_OUT_NAME (offset))
{
alist = access_list_lookup (AFI_IP, OFFSET_LIST_OUT_NAME (offset));
if (alist
&& access_list_apply (alist, (struct prefix *)p) == FILTER_PERMIT)
{
*metric += OFFSET_LIST_OUT_METRIC (offset);
return 1;
}
return 0;
}
/* Look up offset-list without interface name. */
offset = rip_offset_list_lookup (NULL);
if (offset && OFFSET_LIST_OUT_NAME (offset))
{
alist = access_list_lookup (AFI_IP, OFFSET_LIST_OUT_NAME (offset));
if (alist
&& access_list_apply (alist, (struct prefix *)p) == FILTER_PERMIT)
{
*metric += OFFSET_LIST_OUT_METRIC (offset);
return 1;
}
return 0;
}
return 0;
}
DEFUN (rip_offset_list,
rip_offset_list_cmd,
"offset-list WORD (in|out) <0-16>",
"Modify RIP metric\n"
"Access-list name\n"
"For incoming updates\n"
"For outgoing updates\n"
"Metric value\n")
{
return rip_offset_list_set (vty, argv[0], argv[1], argv[2], NULL);
}
DEFUN (rip_offset_list_ifname,
rip_offset_list_ifname_cmd,
"offset-list WORD (in|out) <0-16> IFNAME",
"Modify RIP metric\n"
"Access-list name\n"
"For incoming updates\n"
"For outgoing updates\n"
"Metric value\n"
"Interface to match\n")
{
return rip_offset_list_set (vty, argv[0], argv[1], argv[2], argv[3]);
}
DEFUN (no_rip_offset_list,
no_rip_offset_list_cmd,
"no offset-list WORD (in|out) <0-16>",
NO_STR
"Modify RIP metric\n"
"Access-list name\n"
"For incoming updates\n"
"For outgoing updates\n"
"Metric value\n")
{
return rip_offset_list_unset (vty, argv[0], argv[1], argv[2], NULL);
}
DEFUN (no_rip_offset_list_ifname,
no_rip_offset_list_ifname_cmd,
"no offset-list WORD (in|out) <0-16> IFNAME",
NO_STR
"Modify RIP metric\n"
"Access-list name\n"
"For incoming updates\n"
"For outgoing updates\n"
"Metric value\n"
"Interface to match\n")
{
return rip_offset_list_unset (vty, argv[0], argv[1], argv[2], argv[3]);
}
static int
offset_list_cmp (struct rip_offset_list *o1, struct rip_offset_list *o2)
{
return strcmp_safe (o1->ifname, o2->ifname);
}
static void
offset_list_del (struct rip_offset_list *offset)
{
if (OFFSET_LIST_IN_NAME (offset))
free (OFFSET_LIST_IN_NAME (offset));
if (OFFSET_LIST_OUT_NAME (offset))
free (OFFSET_LIST_OUT_NAME (offset));
if (offset->ifname)
free (offset->ifname);
rip_offset_list_free (offset);
}
void
rip_offset_init ()
{
rip_offset_list_master = list_new ();
rip_offset_list_master->cmp = (int (*)(void *, void *)) offset_list_cmp;
rip_offset_list_master->del = (void (*)(void *)) offset_list_del;
install_element (RIP_NODE, &rip_offset_list_cmd);
install_element (RIP_NODE, &rip_offset_list_ifname_cmd);
install_element (RIP_NODE, &no_rip_offset_list_cmd);
install_element (RIP_NODE, &no_rip_offset_list_ifname_cmd);
}
void
rip_offset_clean ()
{
list_delete (rip_offset_list_master);
rip_offset_list_master = list_new ();
rip_offset_list_master->cmp = (int (*)(void *, void *)) offset_list_cmp;
rip_offset_list_master->del = (void (*)(void *)) offset_list_del;
}
int
config_write_rip_offset_list (struct vty *vty)
{
struct listnode *node, *nnode;
struct rip_offset_list *offset;
for (ALL_LIST_ELEMENTS (rip_offset_list_master, node, nnode, offset))
{
if (! offset->ifname)
{
if (offset->direct[RIP_OFFSET_LIST_IN].alist_name)
vty_out (vty, " offset-list %s in %d%s",
offset->direct[RIP_OFFSET_LIST_IN].alist_name,
offset->direct[RIP_OFFSET_LIST_IN].metric,
VTY_NEWLINE);
if (offset->direct[RIP_OFFSET_LIST_OUT].alist_name)
vty_out (vty, " offset-list %s out %d%s",
offset->direct[RIP_OFFSET_LIST_OUT].alist_name,
offset->direct[RIP_OFFSET_LIST_OUT].metric,
VTY_NEWLINE);
}
else
{
if (offset->direct[RIP_OFFSET_LIST_IN].alist_name)
vty_out (vty, " offset-list %s in %d %s%s",
offset->direct[RIP_OFFSET_LIST_IN].alist_name,
offset->direct[RIP_OFFSET_LIST_IN].metric,
offset->ifname, VTY_NEWLINE);
if (offset->direct[RIP_OFFSET_LIST_OUT].alist_name)
vty_out (vty, " offset-list %s out %d %s%s",
offset->direct[RIP_OFFSET_LIST_OUT].alist_name,
offset->direct[RIP_OFFSET_LIST_OUT].metric,
offset->ifname, VTY_NEWLINE);
}
}
return 0;
}
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