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mirror_frr/lib/distribute.c
Stephen Hemminger 393deb9bd6 [cleanup] Convert XMALLOC/memset to XCALLOC 
Simple conversion of XMALLOC/memset to XCALLOC
2009-06-12 17:07:49 +01:00

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/* Distribute list functions
* 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 "hash.h"
#include "if.h"
#include "filter.h"
#include "command.h"
#include "distribute.h"
#include "memory.h"
/* Hash of distribute list. */
struct hash *disthash;
/* Hook functions. */
void (*distribute_add_hook) (struct distribute *);
void (*distribute_delete_hook) (struct distribute *);
static struct distribute *
distribute_new (void)
{
return XCALLOC (MTYPE_DISTRIBUTE, sizeof (struct distribute));
}
/* Free distribute object. */
static void
distribute_free (struct distribute *dist)
{
if (dist->ifname)
XFREE (MTYPE_DISTRIBUTE_IFNAME, dist->ifname);
if (dist->list[DISTRIBUTE_IN])
free (dist->list[DISTRIBUTE_IN]);
if (dist->list[DISTRIBUTE_OUT])
free (dist->list[DISTRIBUTE_OUT]);
if (dist->prefix[DISTRIBUTE_IN])
free (dist->prefix[DISTRIBUTE_IN]);
if (dist->prefix[DISTRIBUTE_OUT])
free (dist->prefix[DISTRIBUTE_OUT]);
XFREE (MTYPE_DISTRIBUTE, dist);
}
/* Lookup interface's distribute list. */
struct distribute *
distribute_lookup (const char *ifname)
{
struct distribute key;
struct distribute *dist;
/* temporary reference */
key.ifname = (char *)ifname;
dist = hash_lookup (disthash, &key);
return dist;
}
void
distribute_list_add_hook (void (*func) (struct distribute *))
{
distribute_add_hook = func;
}
void
distribute_list_delete_hook (void (*func) (struct distribute *))
{
distribute_delete_hook = func;
}
static void *
distribute_hash_alloc (struct distribute *arg)
{
struct distribute *dist;
dist = distribute_new ();
if (arg->ifname)
dist->ifname = XSTRDUP (MTYPE_DISTRIBUTE_IFNAME, arg->ifname);
else
dist->ifname = NULL;
return dist;
}
/* Make new distribute list and push into hash. */
static struct distribute *
distribute_get (const char *ifname)
{
struct distribute key;
/* temporary reference */
key.ifname = (char *)ifname;
return hash_get (disthash, &key, (void * (*) (void *))distribute_hash_alloc);
}
static unsigned int
distribute_hash_make (struct distribute *dist)
{
unsigned int i, key;
key = 0;
if (dist->ifname)
for (i = 0; i < strlen (dist->ifname); i++)
key += dist->ifname[i];
return key;
}
/* If two distribute-list have same value then return 1 else return
0. This function is used by hash package. */
static int
distribute_cmp (const struct distribute *dist1, const struct distribute *dist2)
{
if (dist1->ifname && dist2->ifname)
if (strcmp (dist1->ifname, dist2->ifname) == 0)
return 1;
if (! dist1->ifname && ! dist2->ifname)
return 1;
return 0;
}
/* Set access-list name to the distribute list. */
static struct distribute *
distribute_list_set (const char *ifname, enum distribute_type type,
const char *alist_name)
{
struct distribute *dist;
dist = distribute_get (ifname);
if (type == DISTRIBUTE_IN)
{
if (dist->list[DISTRIBUTE_IN])
free (dist->list[DISTRIBUTE_IN]);
dist->list[DISTRIBUTE_IN] = strdup (alist_name);
}
if (type == DISTRIBUTE_OUT)
{
if (dist->list[DISTRIBUTE_OUT])
free (dist->list[DISTRIBUTE_OUT]);
dist->list[DISTRIBUTE_OUT] = strdup (alist_name);
}
/* Apply this distribute-list to the interface. */
(*distribute_add_hook) (dist);
return dist;
}
/* Unset distribute-list. If matched distribute-list exist then
return 1. */
static int
distribute_list_unset (const char *ifname, enum distribute_type type,
const char *alist_name)
{
struct distribute *dist;
dist = distribute_lookup (ifname);
if (!dist)
return 0;
if (type == DISTRIBUTE_IN)
{
if (!dist->list[DISTRIBUTE_IN])
return 0;
if (strcmp (dist->list[DISTRIBUTE_IN], alist_name) != 0)
return 0;
free (dist->list[DISTRIBUTE_IN]);
dist->list[DISTRIBUTE_IN] = NULL;
}
if (type == DISTRIBUTE_OUT)
{
if (!dist->list[DISTRIBUTE_OUT])
return 0;
if (strcmp (dist->list[DISTRIBUTE_OUT], alist_name) != 0)
return 0;
free (dist->list[DISTRIBUTE_OUT]);
dist->list[DISTRIBUTE_OUT] = NULL;
}
/* Apply this distribute-list to the interface. */
(*distribute_delete_hook) (dist);
/* If both out and in is NULL then free distribute list. */
if (dist->list[DISTRIBUTE_IN] == NULL &&
dist->list[DISTRIBUTE_OUT] == NULL &&
dist->prefix[DISTRIBUTE_IN] == NULL &&
dist->prefix[DISTRIBUTE_OUT] == NULL)
{
hash_release (disthash, dist);
distribute_free (dist);
}
return 1;
}
/* Set access-list name to the distribute list. */
static struct distribute *
distribute_list_prefix_set (const char *ifname, enum distribute_type type,
const char *plist_name)
{
struct distribute *dist;
dist = distribute_get (ifname);
if (type == DISTRIBUTE_IN)
{
if (dist->prefix[DISTRIBUTE_IN])
free (dist->prefix[DISTRIBUTE_IN]);
dist->prefix[DISTRIBUTE_IN] = strdup (plist_name);
}
if (type == DISTRIBUTE_OUT)
{
if (dist->prefix[DISTRIBUTE_OUT])
free (dist->prefix[DISTRIBUTE_OUT]);
dist->prefix[DISTRIBUTE_OUT] = strdup (plist_name);
}
/* Apply this distribute-list to the interface. */
(*distribute_add_hook) (dist);
return dist;
}
/* Unset distribute-list. If matched distribute-list exist then
return 1. */
static int
distribute_list_prefix_unset (const char *ifname, enum distribute_type type,
const char *plist_name)
{
struct distribute *dist;
dist = distribute_lookup (ifname);
if (!dist)
return 0;
if (type == DISTRIBUTE_IN)
{
if (!dist->prefix[DISTRIBUTE_IN])
return 0;
if (strcmp (dist->prefix[DISTRIBUTE_IN], plist_name) != 0)
return 0;
free (dist->prefix[DISTRIBUTE_IN]);
dist->prefix[DISTRIBUTE_IN] = NULL;
}
if (type == DISTRIBUTE_OUT)
{
if (!dist->prefix[DISTRIBUTE_OUT])
return 0;
if (strcmp (dist->prefix[DISTRIBUTE_OUT], plist_name) != 0)
return 0;
free (dist->prefix[DISTRIBUTE_OUT]);
dist->prefix[DISTRIBUTE_OUT] = NULL;
}
/* Apply this distribute-list to the interface. */
(*distribute_delete_hook) (dist);
/* If both out and in is NULL then free distribute list. */
if (dist->list[DISTRIBUTE_IN] == NULL &&
dist->list[DISTRIBUTE_OUT] == NULL &&
dist->prefix[DISTRIBUTE_IN] == NULL &&
dist->prefix[DISTRIBUTE_OUT] == NULL)
{
hash_release (disthash, dist);
distribute_free (dist);
}
return 1;
}
DEFUN (distribute_list_all,
distribute_list_all_cmd,
"distribute-list WORD (in|out)",
"Filter networks in routing updates\n"
"Access-list name\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n")
{
enum distribute_type type;
struct distribute *dist;
/* Check of distribute list type. */
if (strncmp (argv[1], "i", 1) == 0)
type = DISTRIBUTE_IN;
else if (strncmp (argv[1], "o", 1) == 0)
type = DISTRIBUTE_OUT;
else
{
vty_out (vty, "distribute list direction must be [in|out]%s",
VTY_NEWLINE);
return CMD_WARNING;
}
/* Get interface name corresponding distribute list. */
dist = distribute_list_set (NULL, type, argv[0]);
return CMD_SUCCESS;
}
ALIAS (distribute_list_all,
ipv6_distribute_list_all_cmd,
"distribute-list WORD (in|out)",
"Filter networks in routing updates\n"
"Access-list name\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n")
DEFUN (no_distribute_list_all,
no_distribute_list_all_cmd,
"no distribute-list WORD (in|out)",
NO_STR
"Filter networks in routing updates\n"
"Access-list name\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n")
{
int ret;
enum distribute_type type;
/* Check of distribute list type. */
if (strncmp (argv[1], "i", 1) == 0)
type = DISTRIBUTE_IN;
else if (strncmp (argv[1], "o", 1) == 0)
type = DISTRIBUTE_OUT;
else
{
vty_out (vty, "distribute list direction must be [in|out]%s",
VTY_NEWLINE);
return CMD_WARNING;
}
ret = distribute_list_unset (NULL, type, argv[0]);
if (! ret)
{
vty_out (vty, "distribute list doesn't exist%s", VTY_NEWLINE);
return CMD_WARNING;
}
return CMD_SUCCESS;
}
ALIAS (no_distribute_list_all,
no_ipv6_distribute_list_all_cmd,
"no distribute-list WORD (in|out)",
NO_STR
"Filter networks in routing updates\n"
"Access-list name\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n")
DEFUN (distribute_list,
distribute_list_cmd,
"distribute-list WORD (in|out) WORD",
"Filter networks in routing updates\n"
"Access-list name\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n"
"Interface name\n")
{
enum distribute_type type;
struct distribute *dist;
/* Check of distribute list type. */
if (strncmp (argv[1], "i", 1) == 0)
type = DISTRIBUTE_IN;
else if (strncmp (argv[1], "o", 1) == 0)
type = DISTRIBUTE_OUT;
else
{
vty_out (vty, "distribute list direction must be [in|out]%s", VTY_NEWLINE);
return CMD_WARNING;
}
/* Get interface name corresponding distribute list. */
dist = distribute_list_set (argv[2], type, argv[0]);
return CMD_SUCCESS;
}
ALIAS (distribute_list,
ipv6_distribute_list_cmd,
"distribute-list WORD (in|out) WORD",
"Filter networks in routing updates\n"
"Access-list name\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n"
"Interface name\n")
DEFUN (no_districute_list, no_distribute_list_cmd,
"no distribute-list WORD (in|out) WORD",
NO_STR
"Filter networks in routing updates\n"
"Access-list name\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n"
"Interface name\n")
{
int ret;
enum distribute_type type;
/* Check of distribute list type. */
if (strncmp (argv[1], "i", 1) == 0)
type = DISTRIBUTE_IN;
else if (strncmp (argv[1], "o", 1) == 0)
type = DISTRIBUTE_OUT;
else
{
vty_out (vty, "distribute list direction must be [in|out]%s", VTY_NEWLINE);
return CMD_WARNING;
}
ret = distribute_list_unset (argv[2], type, argv[0]);
if (! ret)
{
vty_out (vty, "distribute list doesn't exist%s", VTY_NEWLINE);
return CMD_WARNING;
}
return CMD_SUCCESS;
}
ALIAS (no_districute_list, no_ipv6_distribute_list_cmd,
"no distribute-list WORD (in|out) WORD",
NO_STR
"Filter networks in routing updates\n"
"Access-list name\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n"
"Interface name\n")
DEFUN (districute_list_prefix_all,
distribute_list_prefix_all_cmd,
"distribute-list prefix WORD (in|out)",
"Filter networks in routing updates\n"
"Filter prefixes in routing updates\n"
"Name of an IP prefix-list\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n")
{
enum distribute_type type;
struct distribute *dist;
/* Check of distribute list type. */
if (strncmp (argv[1], "i", 1) == 0)
type = DISTRIBUTE_IN;
else if (strncmp (argv[1], "o", 1) == 0)
type = DISTRIBUTE_OUT;
else
{
vty_out (vty, "distribute list direction must be [in|out]%s",
VTY_NEWLINE);
return CMD_WARNING;
}
/* Get interface name corresponding distribute list. */
dist = distribute_list_prefix_set (NULL, type, argv[0]);
return CMD_SUCCESS;
}
ALIAS (districute_list_prefix_all,
ipv6_distribute_list_prefix_all_cmd,
"distribute-list prefix WORD (in|out)",
"Filter networks in routing updates\n"
"Filter prefixes in routing updates\n"
"Name of an IP prefix-list\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n")
DEFUN (no_districute_list_prefix_all,
no_distribute_list_prefix_all_cmd,
"no distribute-list prefix WORD (in|out)",
NO_STR
"Filter networks in routing updates\n"
"Filter prefixes in routing updates\n"
"Name of an IP prefix-list\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n")
{
int ret;
enum distribute_type type;
/* Check of distribute list type. */
if (strncmp (argv[1], "i", 1) == 0)
type = DISTRIBUTE_IN;
else if (strncmp (argv[1], "o", 1) == 0)
type = DISTRIBUTE_OUT;
else
{
vty_out (vty, "distribute list direction must be [in|out]%s",
VTY_NEWLINE);
return CMD_WARNING;
}
ret = distribute_list_prefix_unset (NULL, type, argv[0]);
if (! ret)
{
vty_out (vty, "distribute list doesn't exist%s", VTY_NEWLINE);
return CMD_WARNING;
}
return CMD_SUCCESS;
}
ALIAS (no_districute_list_prefix_all,
no_ipv6_distribute_list_prefix_all_cmd,
"no distribute-list prefix WORD (in|out)",
NO_STR
"Filter networks in routing updates\n"
"Filter prefixes in routing updates\n"
"Name of an IP prefix-list\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n")
DEFUN (districute_list_prefix, distribute_list_prefix_cmd,
"distribute-list prefix WORD (in|out) WORD",
"Filter networks in routing updates\n"
"Filter prefixes in routing updates\n"
"Name of an IP prefix-list\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n"
"Interface name\n")
{
enum distribute_type type;
struct distribute *dist;
/* Check of distribute list type. */
if (strncmp (argv[1], "i", 1) == 0)
type = DISTRIBUTE_IN;
else if (strncmp (argv[1], "o", 1) == 0)
type = DISTRIBUTE_OUT;
else
{
vty_out (vty, "distribute list direction must be [in|out]%s",
VTY_NEWLINE);
return CMD_WARNING;
}
/* Get interface name corresponding distribute list. */
dist = distribute_list_prefix_set (argv[2], type, argv[0]);
return CMD_SUCCESS;
}
ALIAS (districute_list_prefix, ipv6_distribute_list_prefix_cmd,
"distribute-list prefix WORD (in|out) WORD",
"Filter networks in routing updates\n"
"Filter prefixes in routing updates\n"
"Name of an IP prefix-list\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n"
"Interface name\n")
DEFUN (no_districute_list_prefix, no_distribute_list_prefix_cmd,
"no distribute-list prefix WORD (in|out) WORD",
NO_STR
"Filter networks in routing updates\n"
"Filter prefixes in routing updates\n"
"Name of an IP prefix-list\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n"
"Interface name\n")
{
int ret;
enum distribute_type type;
/* Check of distribute list type. */
if (strncmp (argv[1], "i", 1) == 0)
type = DISTRIBUTE_IN;
else if (strncmp (argv[1], "o", 1) == 0)
type = DISTRIBUTE_OUT;
else
{
vty_out (vty, "distribute list direction must be [in|out]%s",
VTY_NEWLINE);
return CMD_WARNING;
}
ret = distribute_list_prefix_unset (argv[2], type, argv[0]);
if (! ret)
{
vty_out (vty, "distribute list doesn't exist%s", VTY_NEWLINE);
return CMD_WARNING;
}
return CMD_SUCCESS;
}
ALIAS (no_districute_list_prefix, no_ipv6_distribute_list_prefix_cmd,
"no distribute-list prefix WORD (in|out) WORD",
NO_STR
"Filter networks in routing updates\n"
"Filter prefixes in routing updates\n"
"Name of an IP prefix-list\n"
"Filter incoming routing updates\n"
"Filter outgoing routing updates\n"
"Interface name\n")
int
config_show_distribute (struct vty *vty)
{
unsigned int i;
struct hash_backet *mp;
struct distribute *dist;
/* Output filter configuration. */
dist = distribute_lookup (NULL);
if (dist && (dist->list[DISTRIBUTE_OUT] || dist->prefix[DISTRIBUTE_OUT]))
{
vty_out (vty, " Outgoing update filter list for all interface is");
if (dist->list[DISTRIBUTE_OUT])
vty_out (vty, " %s", dist->list[DISTRIBUTE_OUT]);
if (dist->prefix[DISTRIBUTE_OUT])
vty_out (vty, "%s (prefix-list) %s",
dist->list[DISTRIBUTE_OUT] ? "," : "",
dist->prefix[DISTRIBUTE_OUT]);
vty_out (vty, "%s", VTY_NEWLINE);
}
else
vty_out (vty, " Outgoing update filter list for all interface is not set%s", VTY_NEWLINE);
for (i = 0; i < disthash->size; i++)
for (mp = disthash->index[i]; mp; mp = mp->next)
{
dist = mp->data;
if (dist->ifname)
if (dist->list[DISTRIBUTE_OUT] || dist->prefix[DISTRIBUTE_OUT])
{
vty_out (vty, " %s filtered by", dist->ifname);
if (dist->list[DISTRIBUTE_OUT])
vty_out (vty, " %s", dist->list[DISTRIBUTE_OUT]);
if (dist->prefix[DISTRIBUTE_OUT])
vty_out (vty, "%s (prefix-list) %s",
dist->list[DISTRIBUTE_OUT] ? "," : "",
dist->prefix[DISTRIBUTE_OUT]);
vty_out (vty, "%s", VTY_NEWLINE);
}
}
/* Input filter configuration. */
dist = distribute_lookup (NULL);
if (dist && (dist->list[DISTRIBUTE_IN] || dist->prefix[DISTRIBUTE_IN]))
{
vty_out (vty, " Incoming update filter list for all interface is");
if (dist->list[DISTRIBUTE_IN])
vty_out (vty, " %s", dist->list[DISTRIBUTE_IN]);
if (dist->prefix[DISTRIBUTE_IN])
vty_out (vty, "%s (prefix-list) %s",
dist->list[DISTRIBUTE_IN] ? "," : "",
dist->prefix[DISTRIBUTE_IN]);
vty_out (vty, "%s", VTY_NEWLINE);
}
else
vty_out (vty, " Incoming update filter list for all interface is not set%s", VTY_NEWLINE);
for (i = 0; i < disthash->size; i++)
for (mp = disthash->index[i]; mp; mp = mp->next)
{
dist = mp->data;
if (dist->ifname)
if (dist->list[DISTRIBUTE_IN] || dist->prefix[DISTRIBUTE_IN])
{
vty_out (vty, " %s filtered by", dist->ifname);
if (dist->list[DISTRIBUTE_IN])
vty_out (vty, " %s", dist->list[DISTRIBUTE_IN]);
if (dist->prefix[DISTRIBUTE_IN])
vty_out (vty, "%s (prefix-list) %s",
dist->list[DISTRIBUTE_IN] ? "," : "",
dist->prefix[DISTRIBUTE_IN]);
vty_out (vty, "%s", VTY_NEWLINE);
}
}
return 0;
}
/* Configuration write function. */
int
config_write_distribute (struct vty *vty)
{
unsigned int i;
struct hash_backet *mp;
int write = 0;
for (i = 0; i < disthash->size; i++)
for (mp = disthash->index[i]; mp; mp = mp->next)
{
struct distribute *dist;
dist = mp->data;
if (dist->list[DISTRIBUTE_IN])
{
vty_out (vty, " distribute-list %s in %s%s",
dist->list[DISTRIBUTE_IN],
dist->ifname ? dist->ifname : "",
VTY_NEWLINE);
write++;
}
if (dist->list[DISTRIBUTE_OUT])
{
vty_out (vty, " distribute-list %s out %s%s",
dist->list[DISTRIBUTE_OUT],
dist->ifname ? dist->ifname : "",
VTY_NEWLINE);
write++;
}
if (dist->prefix[DISTRIBUTE_IN])
{
vty_out (vty, " distribute-list prefix %s in %s%s",
dist->prefix[DISTRIBUTE_IN],
dist->ifname ? dist->ifname : "",
VTY_NEWLINE);
write++;
}
if (dist->prefix[DISTRIBUTE_OUT])
{
vty_out (vty, " distribute-list prefix %s out %s%s",
dist->prefix[DISTRIBUTE_OUT],
dist->ifname ? dist->ifname : "",
VTY_NEWLINE);
write++;
}
}
return write;
}
/* Clear all distribute list. */
void
distribute_list_reset ()
{
hash_clean (disthash, (void (*) (void *)) distribute_free);
}
/* Initialize distribute list related hash. */
void
distribute_list_init (int node)
{
disthash = hash_create ((unsigned int (*) (void *)) distribute_hash_make,
(int (*) (const void *, const void *)) distribute_cmp);
if(node==RIP_NODE) {
install_element (RIP_NODE, &distribute_list_all_cmd);
install_element (RIP_NODE, &no_distribute_list_all_cmd);
install_element (RIP_NODE, &distribute_list_cmd);
install_element (RIP_NODE, &no_distribute_list_cmd);
install_element (RIP_NODE, &distribute_list_prefix_all_cmd);
install_element (RIP_NODE, &no_distribute_list_prefix_all_cmd);
install_element (RIP_NODE, &distribute_list_prefix_cmd);
install_element (RIP_NODE, &no_distribute_list_prefix_cmd);
} else {
install_element (RIPNG_NODE, &ipv6_distribute_list_all_cmd);
install_element (RIPNG_NODE, &no_ipv6_distribute_list_all_cmd);
install_element (RIPNG_NODE, &ipv6_distribute_list_cmd);
install_element (RIPNG_NODE, &no_ipv6_distribute_list_cmd);
install_element (RIPNG_NODE, &ipv6_distribute_list_prefix_all_cmd);
install_element (RIPNG_NODE, &no_ipv6_distribute_list_prefix_all_cmd);
install_element (RIPNG_NODE, &ipv6_distribute_list_prefix_cmd);
install_element (RIPNG_NODE, &no_ipv6_distribute_list_prefix_cmd);
}
}
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