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 }; 179 180 #endif /* __NETNS_SCTP_H__ */ 181