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	/* UDP tunneling listening sock. */
 26	struct sock *udp4_sock;
 27	struct sock *udp6_sock;
 28	/* UDP tunneling listening port. */
 29	int udp_port;
 30	/* UDP tunneling remote encap port. */
 31	int encap_port;
 32
 33	/* This is the global local address list.
 34	 * We actively maintain this complete list of addresses on
 35	 * the system by catching address add/delete events.
 36	 *
 37	 * It is a list of sctp_sockaddr_entry.
 38	 */
 39	struct list_head local_addr_list;
 40	struct list_head addr_waitq;
 41	struct timer_list addr_wq_timer;
 42	struct list_head auto_asconf_splist;
 43	/* Lock that protects both addr_waitq and auto_asconf_splist */
 44	spinlock_t addr_wq_lock;
 45
 46	/* Lock that protects the local_addr_list writers */
 47	spinlock_t local_addr_lock;
 48
 49	/* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
 50	 *
 51	 * The following protocol parameters are RECOMMENDED:
 52	 *
 53	 * RTO.Initial		    - 3	 seconds
 54	 * RTO.Min		    - 1	 second
 55	 * RTO.Max		   -  60 seconds
 56	 * RTO.Alpha		    - 1/8  (3 when converted to right shifts.)
 57	 * RTO.Beta		    - 1/4  (2 when converted to right shifts.)
 58	 */
 59	unsigned int rto_initial;
 60	unsigned int rto_min;
 61	unsigned int rto_max;
 62
 63	/* Note: rto_alpha and rto_beta are really defined as inverse
 64	 * powers of two to facilitate integer operations.
 65	 */
 66	int rto_alpha;
 67	int rto_beta;
 68
 69	/* Max.Burst		    - 4 */
 70	int max_burst;
 71
 72	/* Whether Cookie Preservative is enabled(1) or not(0) */
 73	int cookie_preserve_enable;
 74
 75	/* The namespace default hmac alg */
 76	char *sctp_hmac_alg;
 77
 78	/* Valid.Cookie.Life	    - 60  seconds  */
 79	unsigned int valid_cookie_life;
 80
 81	/* Delayed SACK timeout  200ms default*/
 82	unsigned int sack_timeout;
 83
 84	/* HB.interval		    - 30 seconds  */
 85	unsigned int hb_interval;
 86
 87	/* The interval for PLPMTUD probe timer */
 88	unsigned int probe_interval;
 89
 90	/* Association.Max.Retrans  - 10 attempts
 91	 * Path.Max.Retrans	    - 5	 attempts (per destination address)
 92	 * Max.Init.Retransmits	    - 8	 attempts
 93	 */
 94	int max_retrans_association;
 95	int max_retrans_path;
 96	int max_retrans_init;
 97	/* Potentially-Failed.Max.Retrans sysctl value
 98	 * taken from:
 99	 * http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05
100	 */
101	int pf_retrans;
102
103	/* Primary.Switchover.Max.Retrans sysctl value
104	 * taken from:
105	 * https://tools.ietf.org/html/rfc7829
106	 */
107	int ps_retrans;
108
109	/*
110	 * Disable Potentially-Failed feature, the feature is enabled by default
111	 * pf_enable	-  0  : disable pf
112	 *		- >0  : enable pf
113	 */
114	int pf_enable;
115
116	/*
117	 * Disable Potentially-Failed state exposure, ignored by default
118	 * pf_expose	-  0  : compatible with old applications (by default)
119	 *		-  1  : disable pf state exposure
120	 *		-  2  : enable  pf state exposure
121	 */
122	int pf_expose;
123
124	/*
125	 * Policy for preforming sctp/socket accounting
126	 * 0   - do socket level accounting, all assocs share sk_sndbuf
127	 * 1   - do sctp accounting, each asoc may use sk_sndbuf bytes
128	 */
129	int sndbuf_policy;
130
131	/*
132	 * Policy for preforming sctp/socket accounting
133	 * 0   - do socket level accounting, all assocs share sk_rcvbuf
134	 * 1   - do sctp accounting, each asoc may use sk_rcvbuf bytes
135	 */
136	int rcvbuf_policy;
137
138	int default_auto_asconf;
139
140	/* Flag to indicate if addip is enabled. */
141	int addip_enable;
142	int addip_noauth;
143
144	/* Flag to indicate if PR-SCTP is enabled. */
145	int prsctp_enable;
146
147	/* Flag to indicate if PR-CONFIG is enabled. */
148	int reconf_enable;
149
150	/* Flag to indicate if SCTP-AUTH is enabled */
151	int auth_enable;
152
153	/* Flag to indicate if stream interleave is enabled */
154	int intl_enable;
155
156	/* Flag to indicate if ecn is enabled */
157	int ecn_enable;
158
159	/*
160	 * Policy to control SCTP IPv4 address scoping
161	 * 0   - Disable IPv4 address scoping
162	 * 1   - Enable IPv4 address scoping
163	 * 2   - Selectively allow only IPv4 private addresses
164	 * 3   - Selectively allow only IPv4 link local address
165	 */
166	int scope_policy;
167
168	/* Threshold for rwnd update SACKS.  Receive buffer shifted this many
169	 * bits is an indicator of when to send and window update SACK.
170	 */
171	int rwnd_upd_shift;
172
173	/* Threshold for autoclose timeout, in seconds. */
174	unsigned long max_autoclose;
175};
176
177#endif /* __NETNS_SCTP_H__ */