1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef __NETNS_SCTP_H__
  3#define __NETNS_SCTP_H__
  4
  5struct sock;
  6struct proc_dir_entry;
  7struct sctp_mib;
  8struct ctl_table_header;
  9
 10struct netns_sctp {
 11	DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
 12
 13#ifdef CONFIG_PROC_FS
 14	struct proc_dir_entry *proc_net_sctp;
 15#endif
 16#ifdef CONFIG_SYSCTL
 17	struct ctl_table_header *sysctl_header;
 18#endif
 19	/* This is the global socket data structure used for responding to
 20	 * the Out-of-the-blue (OOTB) packets.  A control sock will be created
 21	 * for this socket at the initialization time.
 22	 */
 23	struct sock *ctl_sock;
 24
 25	/* This is the global local address list.
 26	 * We actively maintain this complete list of addresses on
 27	 * the system by catching address add/delete events.
 28	 *
 29	 * It is a list of sctp_sockaddr_entry.
 30	 */
 31	struct list_head local_addr_list;
 32	struct list_head addr_waitq;
 33	struct timer_list addr_wq_timer;
 34	struct list_head auto_asconf_splist;
 35	/* Lock that protects both addr_waitq and auto_asconf_splist */
 36	spinlock_t addr_wq_lock;
 37
 38	/* Lock that protects the local_addr_list writers */
 39	spinlock_t local_addr_lock;
 40
 41	/* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
 42	 *
 43	 * The following protocol parameters are RECOMMENDED:
 44	 *
 45	 * RTO.Initial		    - 3	 seconds
 46	 * RTO.Min		    - 1	 second
 47	 * RTO.Max		   -  60 seconds
 48	 * RTO.Alpha		    - 1/8  (3 when converted to right shifts.)
 49	 * RTO.Beta		    - 1/4  (2 when converted to right shifts.)
 50	 */
 51	unsigned int rto_initial;
 52	unsigned int rto_min;
 53	unsigned int rto_max;
 54
 55	/* Note: rto_alpha and rto_beta are really defined as inverse
 56	 * powers of two to facilitate integer operations.
 57	 */
 58	int rto_alpha;
 59	int rto_beta;
 60
 61	/* Max.Burst		    - 4 */
 62	int max_burst;
 63
 64	/* Whether Cookie Preservative is enabled(1) or not(0) */
 65	int cookie_preserve_enable;
 66
 67	/* The namespace default hmac alg */
 68	char *sctp_hmac_alg;
 69
 70	/* Valid.Cookie.Life	    - 60  seconds  */
 71	unsigned int valid_cookie_life;
 72
 73	/* Delayed SACK timeout  200ms default*/
 74	unsigned int sack_timeout;
 75
 76	/* HB.interval		    - 30 seconds  */
 77	unsigned int hb_interval;
 78
 79	/* Association.Max.Retrans  - 10 attempts
 80	 * Path.Max.Retrans	    - 5	 attempts (per destination address)
 81	 * Max.Init.Retransmits	    - 8	 attempts
 82	 */
 83	int max_retrans_association;
 84	int max_retrans_path;
 85	int max_retrans_init;
 86	/* Potentially-Failed.Max.Retrans sysctl value
 87	 * taken from:
 88	 * http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05
 89	 */
 90	int pf_retrans;
 91
 92	/*
 93	 * Disable Potentially-Failed feature, the feature is enabled by default
 94	 * pf_enable	-  0  : disable pf
 95	 *		- >0  : enable pf
 96	 */
 97	int pf_enable;
 98
 99	/*
100	 * Policy for preforming sctp/socket accounting
101	 * 0   - do socket level accounting, all assocs share sk_sndbuf
102	 * 1   - do sctp accounting, each asoc may use sk_sndbuf bytes
103	 */
104	int sndbuf_policy;
105
106	/*
107	 * Policy for preforming sctp/socket accounting
108	 * 0   - do socket level accounting, all assocs share sk_rcvbuf
109	 * 1   - do sctp accounting, each asoc may use sk_rcvbuf bytes
110	 */
111	int rcvbuf_policy;
112
113	int default_auto_asconf;
114
115	/* Flag to indicate if addip is enabled. */
116	int addip_enable;
117	int addip_noauth;
118
119	/* Flag to indicate if PR-SCTP is enabled. */
120	int prsctp_enable;
121
122	/* Flag to indicate if PR-CONFIG is enabled. */
123	int reconf_enable;
124
125	/* Flag to indicate if SCTP-AUTH is enabled */
126	int auth_enable;
127
128	/* Flag to indicate if stream interleave is enabled */
129	int intl_enable;
130
131	/* Flag to indicate if ecn is enabled */
132	int ecn_enable;
133
134	/*
135	 * Policy to control SCTP IPv4 address scoping
136	 * 0   - Disable IPv4 address scoping
137	 * 1   - Enable IPv4 address scoping
138	 * 2   - Selectively allow only IPv4 private addresses
139	 * 3   - Selectively allow only IPv4 link local address
140	 */
141	int scope_policy;
142
143	/* Threshold for rwnd update SACKS.  Receive buffer shifted this many
144	 * bits is an indicator of when to send and window update SACK.
145	 */
146	int rwnd_upd_shift;
147
148	/* Threshold for autoclose timeout, in seconds. */
149	unsigned long max_autoclose;
150};
151
152#endif /* __NETNS_SCTP_H__ */