net/netns/sctp.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __NETNS_SCTP_H__
0003 #define __NETNS_SCTP_H__
0004
0005 #include <linux/timer.h>
0006 #include <net/snmp.h>
0007
0008 struct sock;
0009 struct proc_dir_entry;
0010 struct sctp_mib;
0011 struct ctl_table_header;
0012
0013 struct netns_sctp {
0014     DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
0015
0016 #ifdef CONFIG_PROC_FS
0017     struct proc_dir_entry *proc_net_sctp;
0018 #endif
0019 #ifdef CONFIG_SYSCTL
0020     struct ctl_table_header *sysctl_header;
0021 #endif
0022     /* This is the global socket data structure used for responding to
0023      * the Out-of-the-blue (OOTB) packets.  A control sock will be created
0024      * for this socket at the initialization time.
0025      */
0026     struct sock *ctl_sock;
0027
0028     /* UDP tunneling listening sock. */
0029     struct sock *udp4_sock;
0030     struct sock *udp6_sock;
0031     /* UDP tunneling listening port. */
0032     int udp_port;
0033     /* UDP tunneling remote encap port. */
0034     int encap_port;
0035
0036     /* This is the global local address list.
0037      * We actively maintain this complete list of addresses on
0038      * the system by catching address add/delete events.
0039      *
0040      * It is a list of sctp_sockaddr_entry.
0041      */
0042     struct list_head local_addr_list;
0043     struct list_head addr_waitq;
0044     struct timer_list addr_wq_timer;
0045     struct list_head auto_asconf_splist;
0046     /* Lock that protects both addr_waitq and auto_asconf_splist */
0047     spinlock_t addr_wq_lock;
0048
0049     /* Lock that protects the local_addr_list writers */
0050     spinlock_t local_addr_lock;
0051
0052     /* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
0053      *
0054      * The following protocol parameters are RECOMMENDED:
0055      *
0056      * RTO.Initial          - 3  seconds
0057      * RTO.Min          - 1  second
0058      * RTO.Max         -  60 seconds
0059      * RTO.Alpha            - 1/8  (3 when converted to right shifts.)
0060      * RTO.Beta         - 1/4  (2 when converted to right shifts.)
0061      */
0062     unsigned int rto_initial;
0063     unsigned int rto_min;
0064     unsigned int rto_max;
0065
0066     /* Note: rto_alpha and rto_beta are really defined as inverse
0067      * powers of two to facilitate integer operations.
0068      */
0069     int rto_alpha;
0070     int rto_beta;
0071
0072     /* Max.Burst            - 4 */
0073     int max_burst;
0074
0075     /* Whether Cookie Preservative is enabled(1) or not(0) */
0076     int cookie_preserve_enable;
0077
0078     /* The namespace default hmac alg */
0079     char *sctp_hmac_alg;
0080
0081     /* Valid.Cookie.Life        - 60  seconds  */
0082     unsigned int valid_cookie_life;
0083
0084     /* Delayed SACK timeout  200ms default*/
0085     unsigned int sack_timeout;
0086
0087     /* HB.interval          - 30 seconds  */
0088     unsigned int hb_interval;
0089
0090     /* The interval for PLPMTUD probe timer */
0091     unsigned int probe_interval;
0092
0093     /* Association.Max.Retrans  - 10 attempts
0094      * Path.Max.Retrans     - 5  attempts (per destination address)
0095      * Max.Init.Retransmits     - 8  attempts
0096      */
0097     int max_retrans_association;
0098     int max_retrans_path;
0099     int max_retrans_init;
0100     /* Potentially-Failed.Max.Retrans sysctl value
0101      * taken from:
0102      * http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05
0103      */
0104     int pf_retrans;
0105
0106     /* Primary.Switchover.Max.Retrans sysctl value
0107      * taken from:
0108      * https://tools.ietf.org/html/rfc7829
0109      */
0110     int ps_retrans;
0111
0112     /*
0113      * Disable Potentially-Failed feature, the feature is enabled by default
0114      * pf_enable    -  0  : disable pf
0115      *      - >0  : enable pf
0116      */
0117     int pf_enable;
0118
0119     /*
0120      * Disable Potentially-Failed state exposure, ignored by default
0121      * pf_expose    -  0  : compatible with old applications (by default)
0122      *      -  1  : disable pf state exposure
0123      *      -  2  : enable  pf state exposure
0124      */
0125     int pf_expose;
0126
0127     /*
0128      * Policy for preforming sctp/socket accounting
0129      * 0   - do socket level accounting, all assocs share sk_sndbuf
0130      * 1   - do sctp accounting, each asoc may use sk_sndbuf bytes
0131      */
0132     int sndbuf_policy;
0133
0134     /*
0135      * Policy for preforming sctp/socket accounting
0136      * 0   - do socket level accounting, all assocs share sk_rcvbuf
0137      * 1   - do sctp accounting, each asoc may use sk_rcvbuf bytes
0138      */
0139     int rcvbuf_policy;
0140
0141     int default_auto_asconf;
0142
0143     /* Flag to indicate if addip is enabled. */
0144     int addip_enable;
0145     int addip_noauth;
0146
0147     /* Flag to indicate if PR-SCTP is enabled. */
0148     int prsctp_enable;
0149
0150     /* Flag to indicate if PR-CONFIG is enabled. */
0151     int reconf_enable;
0152
0153     /* Flag to indicate if SCTP-AUTH is enabled */
0154     int auth_enable;
0155
0156     /* Flag to indicate if stream interleave is enabled */
0157     int intl_enable;
0158
0159     /* Flag to indicate if ecn is enabled */
0160     int ecn_enable;
0161
0162     /*
0163      * Policy to control SCTP IPv4 address scoping
0164      * 0   - Disable IPv4 address scoping
0165      * 1   - Enable IPv4 address scoping
0166      * 2   - Selectively allow only IPv4 private addresses
0167      * 3   - Selectively allow only IPv4 link local address
0168      */
0169     int scope_policy;
0170
0171     /* Threshold for rwnd update SACKS.  Receive buffer shifted this many
0172      * bits is an indicator of when to send and window update SACK.
0173      */
0174     int rwnd_upd_shift;
0175
0176     /* Threshold for autoclose timeout, in seconds. */
0177     unsigned long max_autoclose;
0178 };
0179
0180 #endif /* __NETNS_SCTP_H__ */