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 /* This is the global local address list. 26 * We actively maintain this complete list of addresses on 27 * the system by catching address add/delete events. 28 * 29 * It is a list of sctp_sockaddr_entry. 30 */ 31 struct list_head local_addr_list; 32 struct list_head addr_waitq; 33 struct timer_list addr_wq_timer; 34 struct list_head auto_asconf_splist; 35 /* Lock that protects both addr_waitq and auto_asconf_splist */ 36 spinlock_t addr_wq_lock; 37 38 /* Lock that protects the local_addr_list writers */ 39 spinlock_t local_addr_lock; 40 41 /* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values 42 * 43 * The following protocol parameters are RECOMMENDED: 44 * 45 * RTO.Initial - 3 seconds 46 * RTO.Min - 1 second 47 * RTO.Max - 60 seconds 48 * RTO.Alpha - 1/8 (3 when converted to right shifts.) 49 * RTO.Beta - 1/4 (2 when converted to right shifts.) 50 */ 51 unsigned int rto_initial; 52 unsigned int rto_min; 53 unsigned int rto_max; 54 55 /* Note: rto_alpha and rto_beta are really defined as inverse 56 * powers of two to facilitate integer operations. 57 */ 58 int rto_alpha; 59 int rto_beta; 60 61 /* Max.Burst - 4 */ 62 int max_burst; 63 64 /* Whether Cookie Preservative is enabled(1) or not(0) */ 65 int cookie_preserve_enable; 66 67 /* The namespace default hmac alg */ 68 char *sctp_hmac_alg; 69 70 /* Valid.Cookie.Life - 60 seconds */ 71 unsigned int valid_cookie_life; 72 73 /* Delayed SACK timeout 200ms default*/ 74 unsigned int sack_timeout; 75 76 /* HB.interval - 30 seconds */ 77 unsigned int hb_interval; 78 79 /* Association.Max.Retrans - 10 attempts 80 * Path.Max.Retrans - 5 attempts (per destination address) 81 * Max.Init.Retransmits - 8 attempts 82 */ 83 int max_retrans_association; 84 int max_retrans_path; 85 int max_retrans_init; 86 /* Potentially-Failed.Max.Retrans sysctl value 87 * taken from: 88 * http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05 89 */ 90 int pf_retrans; 91 92 /* Primary.Switchover.Max.Retrans sysctl value 93 * taken from: 94 * https://tools.ietf.org/html/rfc7829 95 */ 96 int ps_retrans; 97 98 /* 99 * Disable Potentially-Failed feature, the feature is enabled by default 100 * pf_enable - 0 : disable pf 101 * - >0 : enable pf 102 */ 103 int pf_enable; 104 105 /* 106 * Disable Potentially-Failed state exposure, ignored by default 107 * pf_expose - 0 : compatible with old applications (by default) 108 * - 1 : disable pf state exposure 109 * - 2 : enable pf state exposure 110 */ 111 int pf_expose; 112 113 /* 114 * Policy for preforming sctp/socket accounting 115 * 0 - do socket level accounting, all assocs share sk_sndbuf 116 * 1 - do sctp accounting, each asoc may use sk_sndbuf bytes 117 */ 118 int sndbuf_policy; 119 120 /* 121 * Policy for preforming sctp/socket accounting 122 * 0 - do socket level accounting, all assocs share sk_rcvbuf 123 * 1 - do sctp accounting, each asoc may use sk_rcvbuf bytes 124 */ 125 int rcvbuf_policy; 126 127 int default_auto_asconf; 128 129 /* Flag to indicate if addip is enabled. */ 130 int addip_enable; 131 int addip_noauth; 132 133 /* Flag to indicate if PR-SCTP is enabled. */ 134 int prsctp_enable; 135 136 /* Flag to indicate if PR-CONFIG is enabled. */ 137 int reconf_enable; 138 139 /* Flag to indicate if SCTP-AUTH is enabled */ 140 int auth_enable; 141 142 /* Flag to indicate if stream interleave is enabled */ 143 int intl_enable; 144 145 /* Flag to indicate if ecn is enabled */ 146 int ecn_enable; 147 148 /* 149 * Policy to control SCTP IPv4 address scoping 150 * 0 - Disable IPv4 address scoping 151 * 1 - Enable IPv4 address scoping 152 * 2 - Selectively allow only IPv4 private addresses 153 * 3 - Selectively allow only IPv4 link local address 154 */ 155 int scope_policy; 156 157 /* Threshold for rwnd update SACKS. Receive buffer shifted this many 158 * bits is an indicator of when to send and window update SACK. 159 */ 160 int rwnd_upd_shift; 161 162 /* Threshold for autoclose timeout, in seconds. */ 163 unsigned long max_autoclose; 164 }; 165 166 #endif /* __NETNS_SCTP_H__ */ 167