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 /* 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 /* Association.Max.Retrans - 10 attempts 88 * Path.Max.Retrans - 5 attempts (per destination address) 89 * Max.Init.Retransmits - 8 attempts 90 */ 91 int max_retrans_association; 92 int max_retrans_path; 93 int max_retrans_init; 94 /* Potentially-Failed.Max.Retrans sysctl value 95 * taken from: 96 * http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05 97 */ 98 int pf_retrans; 99 100 /* Primary.Switchover.Max.Retrans sysctl value 101 * taken from: 102 * https://tools.ietf.org/html/rfc7829 103 */ 104 int ps_retrans; 105 106 /* 107 * Disable Potentially-Failed feature, the feature is enabled by default 108 * pf_enable - 0 : disable pf 109 * - >0 : enable pf 110 */ 111 int pf_enable; 112 113 /* 114 * Disable Potentially-Failed state exposure, ignored by default 115 * pf_expose - 0 : compatible with old applications (by default) 116 * - 1 : disable pf state exposure 117 * - 2 : enable pf state exposure 118 */ 119 int pf_expose; 120 121 /* 122 * Policy for preforming sctp/socket accounting 123 * 0 - do socket level accounting, all assocs share sk_sndbuf 124 * 1 - do sctp accounting, each asoc may use sk_sndbuf bytes 125 */ 126 int sndbuf_policy; 127 128 /* 129 * Policy for preforming sctp/socket accounting 130 * 0 - do socket level accounting, all assocs share sk_rcvbuf 131 * 1 - do sctp accounting, each asoc may use sk_rcvbuf bytes 132 */ 133 int rcvbuf_policy; 134 135 int default_auto_asconf; 136 137 /* Flag to indicate if addip is enabled. */ 138 int addip_enable; 139 int addip_noauth; 140 141 /* Flag to indicate if PR-SCTP is enabled. */ 142 int prsctp_enable; 143 144 /* Flag to indicate if PR-CONFIG is enabled. */ 145 int reconf_enable; 146 147 /* Flag to indicate if SCTP-AUTH is enabled */ 148 int auth_enable; 149 150 /* Flag to indicate if stream interleave is enabled */ 151 int intl_enable; 152 153 /* Flag to indicate if ecn is enabled */ 154 int ecn_enable; 155 156 /* 157 * Policy to control SCTP IPv4 address scoping 158 * 0 - Disable IPv4 address scoping 159 * 1 - Enable IPv4 address scoping 160 * 2 - Selectively allow only IPv4 private addresses 161 * 3 - Selectively allow only IPv4 link local address 162 */ 163 int scope_policy; 164 165 /* Threshold for rwnd update SACKS. Receive buffer shifted this many 166 * bits is an indicator of when to send and window update SACK. 167 */ 168 int rwnd_upd_shift; 169 170 /* Threshold for autoclose timeout, in seconds. */ 171 unsigned long max_autoclose; 172 }; 173 174 #endif /* __NETNS_SCTP_H__ */ 175