sctp_addr.h revision 11042:2d6e217af1b4 
1326938Sdim/*
2326938Sdim * CDDL HEADER START
3353358Sdim *
4353358Sdim * The contents of this file are subject to the terms of the
5353358Sdim * Common Development and Distribution License (the "License").
6326938Sdim * You may not use this file except in compliance with the License.
7326938Sdim *
8326938Sdim * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9326938Sdim * or http://www.opensolaris.org/os/licensing.
10341825Sdim * See the License for the specific language governing permissions
11326938Sdim * and limitations under the License.
12326938Sdim *
13326938Sdim * When distributing Covered Code, include this CDDL HEADER in each
14326938Sdim * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15326938Sdim * If applicable, add the following below this CDDL HEADER, with the
16326938Sdim * fields enclosed by brackets "[]" replaced with your own identifying
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18326938Sdim *
19326938Sdim * CDDL HEADER END
20326938Sdim */
21326938Sdim/*
22326938Sdim * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23326938Sdim * Use is subject to license terms.
24326938Sdim */
25326938Sdim
26353358Sdim#ifndef	_SCTP_ADDR_H
27353358Sdim#define	_SCTP_ADDR_H
28353358Sdim
29353358Sdim#include <sys/list.h>
30353358Sdim#include <sys/zone.h>
31353358Sdim#include <inet/ip.h>
32353358Sdim
33353358Sdim#ifdef	__cplusplus
34353358Sdimextern "C" {
35353358Sdim#endif
36326938Sdim
37326938Sdim/*
38326938Sdim * SCTP IPIF structure - only relevant fields from ipif_t retained
39 *
40 * There is a global array, sctp_g_ipifs, to store all addresses of
41 * the system.  Each element of the global array is a list of
42 * sctp_ipif_t.
43 *
44 * This structure is also shared by all SCTP PCBs.  Each SCTP PCB has
45 * an array of source addresses.  Each element of that array is a list
46 * of sctp_saddr_ipif_t.  And each sctp_saddr_ipif_t has a pointer
47 * to a sctp_ipif_t.  The reason for sctp_saddr_ipif_t is that each
48 * SCTP PCB may do different things to a source address.  This info
49 * is stored locally in sctp_saddr_ipif_t.
50 *
51 */
52typedef struct sctp_ipif_s {
53	list_node_t		sctp_ipifs;	/* Used by the global list */
54	struct sctp_ill_s	*sctp_ipif_ill;
55	uint_t			sctp_ipif_id;
56	in6_addr_t		sctp_ipif_saddr;
57	int			sctp_ipif_state;
58	uint32_t		sctp_ipif_refcnt;
59	zoneid_t		sctp_ipif_zoneid;
60	krwlock_t		sctp_ipif_lock;
61	boolean_t		sctp_ipif_isv6;
62	uint64_t		sctp_ipif_flags;
63} sctp_ipif_t;
64
65/* ipif_state */
66#define	SCTP_IPIFS_CONDEMNED	-1
67#define	SCTP_IPIFS_INVALID	-2
68#define	SCTP_IPIFS_DOWN		1
69#define	SCTP_IPIFS_UP		2
70
71/*
72 * Individual SCTP source address structure.
73 * saddr_ipifp is the actual pointer to the ipif/address.
74 * saddr_ipif_dontsrc is used to mark an address as currently unusable. This
75 * would be the case when we have added/deleted an address using sctp_bindx()
76 * and are waiting for the ASCONF ACK from the peer to confirm the addition/
77 * deletion. Additionally, saddr_ipif_delete_pending is used to specifically
78 * indicate that an address delete operation is in progress.
79 */
80typedef struct sctp_saddrs_ipif_s {
81	list_node_t	saddr_ipif;
82	sctp_ipif_t 	*saddr_ipifp;
83	uint32_t	saddr_ipif_dontsrc : 1,
84			saddr_ipif_delete_pending : 1,
85			saddr_ipif_unconfirmed : 1,
86			pad : 29;
87} sctp_saddr_ipif_t;
88
89#define	SCTP_DONT_SRC(sctp_saddr)	\
90	((sctp_saddr)->saddr_ipif_dontsrc ||	\
91	(sctp_saddr)->saddr_ipif_unconfirmed)
92
93
94/*
95 * SCTP ILL structure - only relevant fields from ill_t retained.
96 * This pretty much reflects the ILL<->IPIF relation that IP maintains.
97 * At present the only state an ILL can be in is CONDEMNED or not.
98 * sctp_ill_ipifcnt gives the number of IPIFs for this ILL,
99 * sctp_ill_index is phyint_ifindex in the actual ILL structure (in IP)
100 * and sctp_ill_flags is ill_flags from the ILL structure.
101 *
102 * The comment below (and for other netstack_t references) refers
103 * to the fact that we only do netstack_hold in particular cases,
104 * such as the references from open streams (ill_t and conn_t's
105 * pointers). Internally within IP we rely on IP's ability to cleanup e.g.
106 * ire_t's when an ill goes away.
107 */
108typedef struct sctp_ill_s {
109	list_node_t	sctp_ills;
110	int		sctp_ill_name_length;
111	char		*sctp_ill_name;
112	int		sctp_ill_state;
113	uint32_t	sctp_ill_ipifcnt;
114	uint_t		sctp_ill_index;
115	uint64_t	sctp_ill_flags;
116	boolean_t	sctp_ill_isv6;
117	netstack_t	*sctp_ill_netstack; /* Does not have a netstack_hold */
118} sctp_ill_t;
119
120/* ill_state */
121#define	SCTP_ILLS_CONDEMNED	-1
122
123#define	SCTP_ILL_HASH	16
124
125typedef struct sctp_ill_hash_s {
126	list_t	sctp_ill_list;
127	int	ill_count;
128} sctp_ill_hash_t;
129
130
131#define	SCTP_IPIF_REFHOLD(sctp_ipif) {				\
132	atomic_add_32(&(sctp_ipif)->sctp_ipif_refcnt, 1);	\
133}
134
135#define	SCTP_IPIF_REFRELE(sctp_ipif) {					\
136	rw_enter(&(sctp_ipif)->sctp_ipif_lock, RW_WRITER);		\
137	ASSERT((sctp_ipif)->sctp_ipif_refcnt != 0);			\
138	if (--(sctp_ipif)->sctp_ipif_refcnt == 0 && 			\
139	    (sctp_ipif)->sctp_ipif_state == SCTP_IPIFS_CONDEMNED) {	\
140		rw_exit(&(sctp_ipif)->sctp_ipif_lock);			\
141		sctp_ipif_inactive(sctp_ipif);				\
142	} else {							\
143		rw_exit(&(sctp_ipif)->sctp_ipif_lock);			\
144	}								\
145}
146
147/* Address set comparison results. */
148#define	SCTP_ADDR_EQUAL		1
149#define	SCTP_ADDR_SUBSET	2
150#define	SCTP_ADDR_OVERLAP	3
151#define	SCTP_ADDR_DISJOINT	4
152
153extern int		sctp_valid_addr_list(sctp_t *, const void *, uint32_t,
154			    uchar_t *, size_t);
155extern int		sctp_dup_saddrs(sctp_t *, sctp_t *, int);
156extern int		sctp_compare_saddrs(sctp_t *, sctp_t *);
157extern sctp_saddr_ipif_t	*sctp_saddr_lookup(sctp_t *, in6_addr_t *,
158				    uint_t);
159extern in6_addr_t	sctp_get_valid_addr(sctp_t *, boolean_t, boolean_t *);
160extern size_t		sctp_saddr_info(sctp_t *, int, uchar_t *, boolean_t);
161extern void		sctp_del_saddr_list(sctp_t *, const void *, int,
162			    boolean_t);
163extern void		sctp_del_saddr(sctp_t *, sctp_saddr_ipif_t *);
164extern void		sctp_free_saddrs(sctp_t *);
165extern void		sctp_saddr_init(sctp_stack_t *);
166extern void		sctp_saddr_fini(sctp_stack_t *);
167extern int		sctp_getmyaddrs(void *, void *, int *);
168extern int		sctp_saddr_add_addr(sctp_t *, in6_addr_t *, uint_t);
169extern void		sctp_check_saddr(sctp_t *, int, boolean_t,
170			    in6_addr_t *);
171
172#ifdef	__cplusplus
173}
174#endif
175
176#endif	/* _SCTP_ADDR_H */
177