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3c68198e75
Currently sctp allows for the optional use of md5 of sha1 hmac algorithms to generate cookie values when establishing new connections via two build time config options. Theres no real reason to make this a static selection. We can add a sysctl that allows for the dynamic selection of these algorithms at run time, with the default value determined by the corresponding crypto library availability. This comes in handy when, for example running a system in FIPS mode, where use of md5 is disallowed, but SHA1 is permitted. Note: This new sysctl has no corresponding socket option to select the cookie hmac algorithm. I chose not to implement that intentionally, as RFC 6458 contains no option for this value, and I opted not to pollute the socket option namespace. Change notes: v2) * Updated subject to have the proper sctp prefix as per Dave M. * Replaced deafult selection options with new options that allow developers to explicitly select available hmac algs at build time as per suggestion by Vlad Y. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: "David S. Miller" <davem@davemloft.net> CC: netdev@vger.kernel.org Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
#ifndef __NETNS_SCTP_H__
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#define __NETNS_SCTP_H__
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struct sock;
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struct proc_dir_entry;
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struct sctp_mib;
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struct ctl_table_header;
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struct netns_sctp {
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DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *proc_net_sctp;
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#endif
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#ifdef CONFIG_SYSCTL
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struct ctl_table_header *sysctl_header;
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#endif
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/* This is the global socket data structure used for responding to
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* the Out-of-the-blue (OOTB) packets. A control sock will be created
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* for this socket at the initialization time.
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*/
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struct sock *ctl_sock;
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/* This is the global local address list.
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* We actively maintain this complete list of addresses on
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* the system by catching address add/delete events.
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*
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* It is a list of sctp_sockaddr_entry.
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*/
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struct list_head local_addr_list;
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struct list_head addr_waitq;
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struct timer_list addr_wq_timer;
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struct list_head auto_asconf_splist;
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spinlock_t addr_wq_lock;
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/* Lock that protects the local_addr_list writers */
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spinlock_t local_addr_lock;
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/* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
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*
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* The following protocol parameters are RECOMMENDED:
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*
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* RTO.Initial - 3 seconds
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* RTO.Min - 1 second
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* RTO.Max - 60 seconds
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* RTO.Alpha - 1/8 (3 when converted to right shifts.)
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* RTO.Beta - 1/4 (2 when converted to right shifts.)
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*/
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unsigned int rto_initial;
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unsigned int rto_min;
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unsigned int rto_max;
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/* Note: rto_alpha and rto_beta are really defined as inverse
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* powers of two to facilitate integer operations.
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*/
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int rto_alpha;
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int rto_beta;
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/* Max.Burst - 4 */
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int max_burst;
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/* Whether Cookie Preservative is enabled(1) or not(0) */
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int cookie_preserve_enable;
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/* The namespace default hmac alg */
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char *sctp_hmac_alg;
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/* Valid.Cookie.Life - 60 seconds */
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unsigned int valid_cookie_life;
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/* Delayed SACK timeout 200ms default*/
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unsigned int sack_timeout;
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/* HB.interval - 30 seconds */
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unsigned int hb_interval;
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/* Association.Max.Retrans - 10 attempts
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* Path.Max.Retrans - 5 attempts (per destination address)
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* Max.Init.Retransmits - 8 attempts
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*/
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int max_retrans_association;
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int max_retrans_path;
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int max_retrans_init;
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/* Potentially-Failed.Max.Retrans sysctl value
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* taken from:
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* http://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05
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*/
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int pf_retrans;
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/*
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* Policy for preforming sctp/socket accounting
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* 0 - do socket level accounting, all assocs share sk_sndbuf
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* 1 - do sctp accounting, each asoc may use sk_sndbuf bytes
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*/
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int sndbuf_policy;
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/*
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* Policy for preforming sctp/socket accounting
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* 0 - do socket level accounting, all assocs share sk_rcvbuf
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* 1 - do sctp accounting, each asoc may use sk_rcvbuf bytes
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*/
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int rcvbuf_policy;
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int default_auto_asconf;
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/* Flag to indicate if addip is enabled. */
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int addip_enable;
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int addip_noauth;
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/* Flag to indicate if PR-SCTP is enabled. */
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int prsctp_enable;
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/* Flag to idicate if SCTP-AUTH is enabled */
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int auth_enable;
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/*
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* Policy to control SCTP IPv4 address scoping
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* 0 - Disable IPv4 address scoping
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* 1 - Enable IPv4 address scoping
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* 2 - Selectively allow only IPv4 private addresses
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* 3 - Selectively allow only IPv4 link local address
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*/
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int scope_policy;
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/* Threshold for rwnd update SACKS. Receive buffer shifted this many
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* bits is an indicator of when to send and window update SACK.
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*/
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int rwnd_upd_shift;
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/* Threshold for autoclose timeout, in seconds. */
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unsigned long max_autoclose;
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};
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#endif /* __NETNS_SCTP_H__ */
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