rip_offset.c
上传用户:xiaozhuqw
上传日期:2009-11-15
资源大小:1338k
文件大小:11k
- /* 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"
- #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;
- int
- strcmp_safe (char *s1, char *s2)
- {
- if (s1 == NULL && s2 == NULL)
- return 0;
- if (s1 == NULL)
- return -1;
- if (s2 == NULL)
- return 1;
- return strcmp (s1, s2);
- }
- struct rip_offset_list *
- rip_offset_list_new ()
- {
- 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;
- }
- void
- rip_offset_list_free (struct rip_offset_list *offset)
- {
- XFREE (MTYPE_RIP_OFFSET_LIST, offset);
- }
- struct rip_offset_list *
- rip_offset_list_lookup (char *ifname)
- {
- struct rip_offset_list *offset;
- struct listnode *nn;
- LIST_LOOP (rip_offset_list_master, offset, nn)
- {
- if (strcmp_safe (offset->ifname, ifname) == 0)
- return offset;
- }
- return NULL;
- }
- struct rip_offset_list *
- rip_offset_list_get (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;
- }
- int
- rip_offset_list_set (struct vty *vty, char *alist, char *direct_str,
- char *metric_str, 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;
- }
- int
- rip_offset_list_unset (struct vty *vty, char *alist, char *direct_str,
- char *metric_str, 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 metricn"
- "Access-list namen"
- "For incoming updatesn"
- "For outgoing updatesn"
- "Metric valuen")
- {
- 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 metricn"
- "Access-list namen"
- "For incoming updatesn"
- "For outgoing updatesn"
- "Metric valuen"
- "Interface to matchn")
- {
- 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 metricn"
- "Access-list namen"
- "For incoming updatesn"
- "For outgoing updatesn"
- "Metric valuen")
- {
- 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 metricn"
- "Access-list namen"
- "For incoming updatesn"
- "For outgoing updatesn"
- "Metric valuen"
- "Interface to matchn")
- {
- return rip_offset_list_unset (vty, argv[0], argv[1], argv[2], argv[3]);
- }
- int
- offset_list_cmp (struct rip_offset_list *o1, struct rip_offset_list *o2)
- {
- return strcmp_safe (o1->ifname, o2->ifname);
- }
- 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 *nn;
- struct rip_offset_list *offset;
- LIST_LOOP (rip_offset_list_master, offset, nn)
- {
- 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;
- }