include/net/netns/sctp.h

   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         /*
  93          * Disable Potentially-Failed feature, the feature is enabled by default
  94          * pf_enable    -  0  : disable pf
  95          *              - >0  : enable pf
  96          */
  97         int pf_enable;
  98
  99         /*
 100          * Policy for preforming sctp/socket accounting
 101          * 0   - do socket level accounting, all assocs share sk_sndbuf
 102          * 1   - do sctp accounting, each asoc may use sk_sndbuf bytes
 103          */
 104         int sndbuf_policy;
 105
 106         /*
 107          * Policy for preforming sctp/socket accounting
 108          * 0   - do socket level accounting, all assocs share sk_rcvbuf
 109          * 1   - do sctp accounting, each asoc may use sk_rcvbuf bytes
 110          */
 111         int rcvbuf_policy;
 112
 113         int default_auto_asconf;
 114
 115         /* Flag to indicate if addip is enabled. */
 116         int addip_enable;
 117         int addip_noauth;
 118
 119         /* Flag to indicate if PR-SCTP is enabled. */
 120         int prsctp_enable;
 121
 122         /* Flag to indicate if PR-CONFIG is enabled. */
 123         int reconf_enable;
 124
 125         /* Flag to idicate if SCTP-AUTH is enabled */
 126         int auth_enable;
 127
 128         /*
 129          * Policy to control SCTP IPv4 address scoping
 130          * 0   - Disable IPv4 address scoping
 131          * 1   - Enable IPv4 address scoping
 132          * 2   - Selectively allow only IPv4 private addresses
 133          * 3   - Selectively allow only IPv4 link local address
 134          */
 135         int scope_policy;
 136
 137         /* Threshold for rwnd update SACKS.  Receive buffer shifted this many
 138          * bits is an indicator of when to send and window update SACK.
 139          */
 140         int rwnd_upd_shift;
 141
 142         /* Threshold for autoclose timeout, in seconds. */
 143         unsigned long max_autoclose;
 144 };
 145
 146 #endif /* __NETNS_SCTP_H__ */