1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NETNS_SCTP_H__
3 #define __NETNS_SCTP_H__
4 
5 struct sock;
6 struct proc_dir_entry;
7 struct sctp_mib;
8 struct ctl_table_header;
9 
10 struct 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 	/*
132 	 * Policy to control SCTP IPv4 address scoping
133 	 * 0   - Disable IPv4 address scoping
134 	 * 1   - Enable IPv4 address scoping
135 	 * 2   - Selectively allow only IPv4 private addresses
136 	 * 3   - Selectively allow only IPv4 link local address
137 	 */
138 	int scope_policy;
139 
140 	/* Threshold for rwnd update SACKS.  Receive buffer shifted this many
141 	 * bits is an indicator of when to send and window update SACK.
142 	 */
143 	int rwnd_upd_shift;
144 
145 	/* Threshold for autoclose timeout, in seconds. */
146 	unsigned long max_autoclose;
147 };
148 
149 #endif /* __NETNS_SCTP_H__ */
150