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 	/* 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__ */
178