1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __NETNS_SCTP_H__ 3#define __NETNS_SCTP_H__ 4 5struct sock; 6struct proc_dir_entry; 7struct sctp_mib; 8struct ctl_table_header; 9 10struct 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