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sctp.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NETNS_SCTP_H__
#define __NETNS_SCTP_H__

#include <linux/timer.h>
#include <net/snmp.h>

struct sock;
struct proc_dir_entry;
struct sctp_mib;
struct ctl_table_header;

struct netns_sctp {
	DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);

#ifdef CONFIG_PROC_FS
	struct proc_dir_entry *proc_net_sctp;
#endif
#ifdef CONFIG_SYSCTL
	struct ctl_table_header *sysctl_header;
#endif
	/* This is the global socket data structure used for responding to
	 * the Out-of-the-blue (OOTB) packets.  A control sock will be created
	 * for this socket at the initialization time.
	 */
	struct sock *ctl_sock;

/* UDP tunneling listening sock. */
	struct sock *udp4_sock;
	struct sock *udp6_sock;
	/* UDP tunneling listening port. */
	int udp_port;
	/* UDP tunneling remote encap port. */
	int encap_port;

/* This is the global local address list.
	 * We actively maintain this complete list of addresses on
	 * the system by catching address add/delete events.
	 *
	 * It is a list of sctp_sockaddr_entry.
	 */
	struct list_head local_addr_list;
	struct list_head addr_waitq;
	struct timer_list addr_wq_timer;
	struct list_head auto_asconf_splist;
	/* Lock that protects both addr_waitq and auto_asconf_splist */
	spinlock_t addr_wq_lock;

/* Lock that protects the local_addr_list writers */
	spinlock_t local_addr_lock;

/* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
	 *
	 * The following protocol parameters are RECOMMENDED:
	 *
	 * RTO.Initial		    - 3	 seconds
	 * RTO.Min		    - 1	 second
	 * RTO.Max		   -  60 seconds
	 * RTO.Alpha		    - 1/8  (3 when converted to right shifts.)
	 * RTO.Beta		    - 1/4  (2 when converted to right shifts.)
	 */
	unsigned int rto_initial;
	unsigned int rto_min;
	unsigned int rto_max;

/* Note: rto_alpha and rto_beta are really defined as inverse
	 * powers of two to facilitate integer operations.
	 */
	int rto_alpha;
	int rto_beta;

/* Max.Burst		    - 4 */
	int max_burst;

/* Whether Cookie Preservative is enabled(1) or not(0) */
	int cookie_preserve_enable;

/* The namespace default hmac alg */
	char *sctp_hmac_alg;

/* Valid.Cookie.Life	    - 60  seconds  */
	unsigned int valid_cookie_life;

/* Delayed SACK timeout  200ms default*/
	unsigned int sack_timeout;

/* HB.interval		    - 30 seconds  */
	unsigned int hb_interval;

/* The interval for PLPMTUD probe timer */
	unsigned int probe_interval;

/* Association.Max.Retrans  - 10 attempts
	 * Path.Max.Retrans	    - 5	 attempts (per destination address)
	 * Max.Init.Retransmits	    - 8	 attempts
	 */
	int max_retrans_association;
	int max_retrans_path;
	int max_retrans_init;
	/* Potentially-Failed.Max.Retrans sysctl value
	 * taken from:
	 * http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05
	 */
	int pf_retrans;

/* Primary.Switchover.Max.Retrans sysctl value
	 * taken from:
	 * https://tools.ietf.org/html/rfc7829
	 */
	int ps_retrans;

/*
	 * Disable Potentially-Failed feature, the feature is enabled by default
	 * pf_enable	-  0  : disable pf
	 *		- >0  : enable pf
	 */
	int pf_enable;

/*
	 * Disable Potentially-Failed state exposure, ignored by default
	 * pf_expose	-  0  : compatible with old applications (by default)
	 *		-  1  : disable pf state exposure
	 *		-  2  : enable  pf state exposure
	 */
	int pf_expose;

/*
	 * Policy for preforming sctp/socket accounting
	 * 0   - do socket level accounting, all assocs share sk_sndbuf
	 * 1   - do sctp accounting, each asoc may use sk_sndbuf bytes
	 */
	int sndbuf_policy;

/*
	 * Policy for preforming sctp/socket accounting
	 * 0   - do socket level accounting, all assocs share sk_rcvbuf
	 * 1   - do sctp accounting, each asoc may use sk_rcvbuf bytes
	 */
	int rcvbuf_policy;

int default_auto_asconf;

/* Flag to indicate if addip is enabled. */
	int addip_enable;
	int addip_noauth;

/* Flag to indicate if PR-SCTP is enabled. */
	int prsctp_enable;

/* Flag to indicate if PR-CONFIG is enabled. */
	int reconf_enable;

/* Flag to indicate if SCTP-AUTH is enabled */
	int auth_enable;

/* Flag to indicate if stream interleave is enabled */
	int intl_enable;

/* Flag to indicate if ecn is enabled */
	int ecn_enable;

/*
	 * Policy to control SCTP IPv4 address scoping
	 * 0   - Disable IPv4 address scoping
	 * 1   - Enable IPv4 address scoping
	 * 2   - Selectively allow only IPv4 private addresses
	 * 3   - Selectively allow only IPv4 link local address
	 */
	int scope_policy;

/* Threshold for rwnd update SACKS.  Receive buffer shifted this many
	 * bits is an indicator of when to send and window update SACK.
	 */
	int rwnd_upd_shift;

/* Threshold for autoclose timeout, in seconds. */
	unsigned long max_autoclose;

#ifdef CONFIG_NET_L3_MASTER_DEV
	int l3mdev_accept;
#endif
};

#endif /* __NETNS_SCTP_H__ */

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2025-05-16 06:28:30
..	dir	-	root/root	drwxr-xr-x	2025-05-16 06:28:30
bpf.h	text/x-c	631 B	root/root	-rw-r--r--	2024-03-11 02:08:09
can.h	text/x-c	1.05 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
conntrack.h	text/x-c	2.21 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
core.h	text/x-c	505 B	root/root	-rw-r--r--	2024-03-11 02:08:09
flow_table.h	text/x-c	287 B	root/root	-rw-r--r--	2024-03-11 02:08:09
generic.h	text/x-c	1.2 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
hash.h	text/x-c	212 B	root/root	-rw-r--r--	2024-03-11 02:08:09
ieee802154_6lowpan.h	text/x-c	395 B	root/root	-rw-r--r--	2024-03-11 02:08:09
ipv4.h	text/x-c	6.71 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
ipv6.h	text/x-c	3.26 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
mctp.h	text/x-c	834 B	root/root	-rw-r--r--	2024-03-11 02:08:09
mib.h	text/x-c	1.24 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
mpls.h	text/x-c	397 B	root/root	-rw-r--r--	2024-03-11 02:08:09
netfilter.h	text/x-c	998 B	root/root	-rw-r--r--	2025-04-15 10:54:36
nexthop.h	text/x-c	456 B	root/root	-rw-r--r--	2024-03-11 02:08:09
nftables.h	text/x-c	146 B	root/root	-rw-r--r--	2024-03-11 02:08:09
packet.h	text/x-c	295 B	root/root	-rw-r--r--	2024-03-11 02:08:09
sctp.h	text/x-c	4.69 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
smc.h	text/x-c	714 B	root/root	-rw-r--r--	2024-03-11 02:08:09
unix.h	text/x-c	392 B	root/root	-rw-r--r--	2024-03-11 02:08:09
xdp.h	text/x-c	237 B	root/root	-rw-r--r--	2024-03-11 02:08:09
xfrm.h	text/x-c	2.07 KB	root/root	-rw-r--r--	2024-03-11 02:08:09