ilb_nat.h revision 10946:324bab2b3370 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef _INET_ILB_NAT_H
28#define	_INET_ILB_NAT_H
29
30#include <sys/vmem.h>
31
32#ifdef __cplusplus
33extern "C" {
34#endif
35
36/* Maximum number of NAT source address of a rule. */
37#define	ILB_MAX_NAT_SRC	10
38
39/* NAT source address hash table. */
40typedef struct ilb_nat_src_hash_s {
41	list_t		nsh_head;
42	kmutex_t	nsh_lock;
43	char		nsh_pad[64 - sizeof (list_t) - sizeof (kmutex_t)];
44} ilb_nat_src_hash_t;
45
46/*
47 * NAT source entry.  Hold the port space for a source addr/back end server
48 * pair.
49 */
50typedef struct ilb_nat_src_entry_s {
51	in6_addr_t	nse_src_addr;
52	in6_addr_t	nse_serv_addr;
53	in_port_t	nse_port;
54	vmem_t		*nse_port_arena;
55	uint32_t	nse_refcnt;
56	kmutex_t	*nse_nsh_lock;
57	list_node_t	nse_link;
58} ilb_nat_src_entry_t;
59
60/* Struct to hold all NAT source entry of a back end server. */
61typedef struct ilb_nat_src_s {
62	uint16_t		cur;
63	uint16_t		num_src;
64	ilb_nat_src_entry_t	*src_list[ILB_MAX_NAT_SRC];
65} ilb_nat_src_t;
66
67extern int ilb_create_nat_src(ilb_stack_t *ilbs, ilb_nat_src_t **,
68    const in6_addr_t *, in_port_t, const in6_addr_t *, int);
69extern void ilb_destroy_nat_src(ilb_nat_src_t **);
70extern void ilb_nat_src_timer(void *);
71extern void ilb_nat_src_init(ilb_stack_t *);
72extern void ilb_nat_src_fini(ilb_stack_t *);
73
74extern ilb_nat_src_entry_t *ilb_alloc_nat_addr(ilb_nat_src_t *, in6_addr_t *,
75    in_port_t *, uint16_t *);
76
77extern void ilb_full_nat(int, void *, int, void *, ilb_nat_info_t *, uint32_t,
78    uint32_t, boolean_t);
79extern void ilb_half_nat(int, void *, int, void *, ilb_nat_info_t *, uint32_t,
80    uint32_t, boolean_t);
81
82extern void ilb_nat_icmpv4(mblk_t *, ipha_t *, icmph_t *, ipha_t *,
83    in_port_t *, in_port_t *, ilb_nat_info_t *, uint32_t, boolean_t);
84extern void ilb_nat_icmpv6(mblk_t *, ip6_t *, icmp6_t *, ip6_t *,
85    in_port_t *, in_port_t *, ilb_nat_info_t *, boolean_t);
86
87extern uint32_t ilb_pseudo_sum_v6(ip6_t *, uint8_t);
88
89#ifdef __cplusplus
90}
91#endif
92
93#endif /* _INET_ILB_NAT_H */
94