1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NETNS_SCTP_H__
3#define __NETNS_SCTP_H__
4
5#include <linux/timer.h>
6#include <net/snmp.h>
7
8struct sock;
9struct proc_dir_entry;
10struct sctp_mib;
11struct ctl_table_header;
12
13struct netns_sctp {
14 DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
15
16#ifdef CONFIG_PROC_FS
17 struct proc_dir_entry *proc_net_sctp;
18#endif
19#ifdef CONFIG_SYSCTL
20 struct ctl_table_header *sysctl_header;
21#endif
22 /* This is the global socket data structure used for responding to
23 * the Out-of-the-blue (OOTB) packets. A control sock will be created
24 * for this socket at the initialization time.
25 */
26 struct sock *ctl_sock;
27
28 /* UDP tunneling listening sock. */
29 struct sock *udp4_sock;
30 struct sock *udp6_sock;
31 /* UDP tunneling listening port. */
32 int udp_port;
33 /* UDP tunneling remote encap port. */
34 int encap_port;
35
36 /* This is the global local address list.
37 * We actively maintain this complete list of addresses on
38 * the system by catching address add/delete events.
39 *
40 * It is a list of sctp_sockaddr_entry.
41 */
42 struct list_head local_addr_list;
43 struct list_head addr_waitq;
44 struct timer_list addr_wq_timer;
45 struct list_head auto_asconf_splist;
46 /* Lock that protects both addr_waitq and auto_asconf_splist */
47 spinlock_t addr_wq_lock;
48
49 /* Lock that protects the local_addr_list writers */
50 spinlock_t local_addr_lock;
51
52 /* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
53 *
54 * The following protocol parameters are RECOMMENDED:
55 *
56 * RTO.Initial - 3 seconds
57 * RTO.Min - 1 second
58 * RTO.Max - 60 seconds
59 * RTO.Alpha - 1/8 (3 when converted to right shifts.)
60 * RTO.Beta - 1/4 (2 when converted to right shifts.)
61 */
62 unsigned int rto_initial;
63 unsigned int rto_min;
64 unsigned int rto_max;
65
66 /* Note: rto_alpha and rto_beta are really defined as inverse
67 * powers of two to facilitate integer operations.
68 */
69 int rto_alpha;
70 int rto_beta;
71
72 /* Max.Burst - 4 */
73 int max_burst;
74
75 /* Whether Cookie Preservative is enabled(1) or not(0) */
76 int cookie_preserve_enable;
77
78 /* Whether cookie authentication is enabled(1) or not(0) */
79 int cookie_auth_enable;
80
81 /* Valid.Cookie.Life - 60 seconds */
82 unsigned int valid_cookie_life;
83
84 /* Delayed SACK timeout 200ms default*/
85 unsigned int sack_timeout;
86
87 /* HB.interval - 30 seconds */
88 unsigned int hb_interval;
89
90 /* The interval for PLPMTUD probe timer */
91 unsigned int probe_interval;
92
93 /* Association.Max.Retrans - 10 attempts
94 * Path.Max.Retrans - 5 attempts (per destination address)
95 * Max.Init.Retransmits - 8 attempts
96 */
97 int max_retrans_association;
98 int max_retrans_path;
99 int max_retrans_init;
100 /* Potentially-Failed.Max.Retrans sysctl value
101 * taken from:
102 * http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05
103 */
104 int pf_retrans;
105
106 /* Primary.Switchover.Max.Retrans sysctl value
107 * taken from:
108 * https://tools.ietf.org/html/rfc7829
109 */
110 int ps_retrans;
111
112 /*
113 * Disable Potentially-Failed feature, the feature is enabled by default
114 * pf_enable - 0 : disable pf
115 * - >0 : enable pf
116 */
117 int pf_enable;
118
119 /*
120 * Disable Potentially-Failed state exposure, ignored by default
121 * pf_expose - 0 : compatible with old applications (by default)
122 * - 1 : disable pf state exposure
123 * - 2 : enable pf state exposure
124 */
125 int pf_expose;
126
127 /*
128 * Policy for performing sctp/socket accounting
129 * 0 - do socket level accounting, all assocs share sk_sndbuf
130 * 1 - do sctp accounting, each asoc may use sk_sndbuf bytes
131 */
132 int sndbuf_policy;
133
134 /*
135 * Policy for performing sctp/socket accounting
136 * 0 - do socket level accounting, all assocs share sk_rcvbuf
137 * 1 - do sctp accounting, each asoc may use sk_rcvbuf bytes
138 */
139 int rcvbuf_policy;
140
141 int default_auto_asconf;
142
143 /* Flag to indicate if addip is enabled. */
144 int addip_enable;
145 int addip_noauth;
146
147 /* Flag to indicate if PR-SCTP is enabled. */
148 int prsctp_enable;
149
150 /* Flag to indicate if PR-CONFIG is enabled. */
151 int reconf_enable;
152
153 /* Flag to indicate if SCTP-AUTH is enabled */
154 int auth_enable;
155
156 /* Flag to indicate if stream interleave is enabled */
157 int intl_enable;
158
159 /* Flag to indicate if ecn is enabled */
160 int ecn_enable;
161
162 /*
163 * Policy to control SCTP IPv4 address scoping
164 * 0 - Disable IPv4 address scoping
165 * 1 - Enable IPv4 address scoping
166 * 2 - Selectively allow only IPv4 private addresses
167 * 3 - Selectively allow only IPv4 link local address
168 */
169 int scope_policy;
170
171 /* Threshold for rwnd update SACKS. Receive buffer shifted this many
172 * bits is an indicator of when to send and window update SACK.
173 */
174 int rwnd_upd_shift;
175
176 /* Threshold for autoclose timeout, in seconds. */
177 unsigned long max_autoclose;
178
179#ifdef CONFIG_NET_L3_MASTER_DEV
180 int l3mdev_accept;
181#endif
182};
183
184#endif /* __NETNS_SCTP_H__ */
185