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-rw-r--r--ripd/rip_offset.c414
1 files changed, 414 insertions, 0 deletions
diff --git a/ripd/rip_offset.c b/ripd/rip_offset.c
new file mode 100644
index 00000000..0d473482
--- /dev/null
+++ b/ripd/rip_offset.c
@@ -0,0 +1,414 @@
+/* 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 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]);
+}
+
+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;
+}
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