xref: /openbmc/linux/include/net/netns/sctp.h (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18)
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  
8  struct sock;
9  struct proc_dir_entry;
10  struct sctp_mib;
11  struct ctl_table_header;
12  
13  struct 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  	/* The namespace default hmac alg */
79  	char *sctp_hmac_alg;
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 preforming 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 preforming 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