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/* Copyright (C) 2003-2008 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/* Kernel module implementing a port set type as a bitmap */
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <asm/uaccess.h>
#include <asm/bitops.h>
#include <linux/spinlock.h>
#include <net/ip.h>
#include <linux/netfilter_ipv4/ip_set_portmap.h>
#include <linux/netfilter_ipv4/ip_set_getport.h>
static inline int
portmap_test(const struct ip_set *set, ip_set_ip_t *hash_port,
ip_set_ip_t port)
{
const struct ip_set_portmap *map = set->data;
if (port < map->first_ip || port > map->last_ip)
return -ERANGE;
*hash_port = port;
DP("set: %s, port:%u, %u", set->name, port, *hash_port);
return !!test_bit(port - map->first_ip, map->members);
}
#define KADT_CONDITION \
if (ip == INVALID_PORT) \
return 0;
UADT(portmap, test)
KADT(portmap, test, get_port)
static inline int
portmap_add(struct ip_set *set, ip_set_ip_t *hash_port, ip_set_ip_t port)
{
struct ip_set_portmap *map = set->data;
if (port < map->first_ip || port > map->last_ip)
return -ERANGE;
if (test_and_set_bit(port - map->first_ip, map->members))
return -EEXIST;
*hash_port = port;
DP("port %u", port);
return 0;
}
UADT(portmap, add)
KADT(portmap, add, get_port)
static inline int
portmap_del(struct ip_set *set, ip_set_ip_t *hash_port, ip_set_ip_t port)
{
struct ip_set_portmap *map = set->data;
if (port < map->first_ip || port > map->last_ip)
return -ERANGE;
if (!test_and_clear_bit(port - map->first_ip, map->members))
return -EEXIST;
*hash_port = port;
DP("port %u", port);
return 0;
}
UADT(portmap, del)
KADT(portmap, del, get_port)
static inline int
__portmap_create(const struct ip_set_req_portmap_create *req,
struct ip_set_portmap *map)
{
if (req->to - req->from > MAX_RANGE) {
ip_set_printk("range too big, %d elements (max %d)",
req->to - req->from + 1, MAX_RANGE+1);
return -ENOEXEC;
}
return bitmap_bytes(req->from, req->to);
}
BITMAP_CREATE(portmap)
BITMAP_DESTROY(portmap)
BITMAP_FLUSH(portmap)
static inline void
__portmap_list_header(const struct ip_set_portmap *map,
struct ip_set_req_portmap_create *header)
{
}
BITMAP_LIST_HEADER(portmap)
BITMAP_LIST_MEMBERS_SIZE(portmap)
BITMAP_LIST_MEMBERS(portmap)
IP_SET_TYPE(portmap, IPSET_TYPE_PORT | IPSET_DATA_SINGLE)
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
MODULE_DESCRIPTION("portmap type of IP sets");
REGISTER_MODULE(portmap)
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