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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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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_MTYPE_STATIC(RIPD, RIP_OFFSET_LIST, "RIP offset list");
#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)
struct rip_offset_list *rip_offset_list_new(struct rip *rip, const char *ifname)
{
struct rip_offset_list *offset;
offset = XCALLOC(MTYPE_RIP_OFFSET_LIST, sizeof(struct rip_offset_list));
offset->rip = rip;
offset->ifname = strdup(ifname);
listnode_add_sort(rip->offset_list_master, offset);
return offset;
}
void offset_list_del(struct rip_offset_list *offset)
{
listnode_delete(offset->rip->offset_list_master, offset);
offset_list_free(offset);
}
void offset_list_free(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));
free(offset->ifname);
XFREE(MTYPE_RIP_OFFSET_LIST, offset);
}
struct rip_offset_list *rip_offset_list_lookup(struct rip *rip,
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(offset->ifname, ifname) == 0)
return offset;
}
return NULL;
}
/* If metric is modified return 1. */
int rip_offset_list_apply_in(struct prefix_ipv4 *p, struct interface *ifp,
uint32_t *metric)
{
struct rip_interface *ri = ifp->info;
struct rip_offset_list *offset;
struct access_list *alist;
/* Look up offset-list with interface name. */
offset = rip_offset_list_lookup(ri->rip, 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(ri->rip, "*");
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 modified return 1. */
int rip_offset_list_apply_out(struct prefix_ipv4 *p, struct interface *ifp,
uint32_t *metric)
{
struct rip_interface *ri = ifp->info;
struct rip_offset_list *offset;
struct access_list *alist;
/* Look up offset-list with interface name. */
offset = rip_offset_list_lookup(ri->rip, 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(ri->rip, "*");
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;
}
int offset_list_cmp(struct rip_offset_list *o1, struct rip_offset_list *o2)
{
return strcmp(o1->ifname, o2->ifname);
}
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