2008-01-11 07:57:09 -07:00
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/* SCTP kernel implementation
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2005-04-16 16:20:36 -06:00
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* (C) Copyright IBM Corp. 2001, 2004
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* Copyright (c) 1999-2000 Cisco, Inc.
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* Copyright (c) 1999-2001 Motorola, Inc.
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* Copyright (c) 2001 Intel Corp.
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*
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2008-01-11 07:57:09 -07:00
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* This file is part of the SCTP kernel implementation
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2005-04-16 16:20:36 -06:00
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*
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2008-01-11 07:57:09 -07:00
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* This SCTP implementation is free software;
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2005-04-16 16:20:36 -06:00
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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2008-01-11 07:57:09 -07:00
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* This SCTP implementation is distributed in the hope that it
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2005-04-16 16:20:36 -06:00
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Please send any bug reports or fixes you make to the
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* email addresses:
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* lksctp developers <lksctp-developers@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* Randall Stewart <randall@sctp.chicago.il.us>
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* Ken Morneau <kmorneau@cisco.com>
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* Qiaobing Xie <qxie1@email.mot.com>
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* La Monte H.P. Yarroll <piggy@acm.org>
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* Karl Knutson <karl@athena.chicago.il.us>
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* Jon Grimm <jgrimm@us.ibm.com>
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* Xingang Guo <xingang.guo@intel.com>
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* Hui Huang <hui.huang@nokia.com>
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* Sridhar Samudrala <sri@us.ibm.com>
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* Daisy Chang <daisyc@us.ibm.com>
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* Dajiang Zhang <dajiang.zhang@nokia.com>
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* Ardelle Fan <ardelle.fan@intel.com>
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* Ryan Layer <rmlayer@us.ibm.com>
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* Anup Pemmaiah <pemmaiah@cc.usu.edu>
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* Kevin Gao <kevin.gao@intel.com>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#ifndef __sctp_structs_h__
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#define __sctp_structs_h__
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#include <linux/time.h> /* We get struct timespec. */
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#include <linux/socket.h> /* linux/in.h needs this!! */
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#include <linux/in.h> /* We get struct sockaddr_in. */
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#include <linux/in6.h> /* We get struct in6_addr */
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#include <linux/ipv6.h>
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#include <asm/param.h> /* We get MAXHOSTNAMELEN. */
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2011-07-26 17:09:06 -06:00
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#include <linux/atomic.h> /* This gets us atomic counters. */
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2005-04-16 16:20:36 -06:00
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#include <linux/skbuff.h> /* We need sk_buff_head. */
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#include <linux/workqueue.h> /* We need tq_struct. */
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#include <linux/sctp.h> /* We need sctp* header structs. */
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2007-10-09 02:15:59 -06:00
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#include <net/sctp/auth.h> /* We need auth specific structs */
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2005-04-16 16:20:36 -06:00
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/* A convenience structure for handling sockaddr structures.
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* We should wean ourselves off this.
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*/
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union sctp_addr {
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struct sockaddr_in v4;
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struct sockaddr_in6 v6;
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struct sockaddr sa;
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};
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/* Forward declarations for data structures. */
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struct sctp_globals;
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struct sctp_endpoint;
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struct sctp_association;
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struct sctp_transport;
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struct sctp_packet;
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struct sctp_chunk;
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struct sctp_inq;
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struct sctp_outq;
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struct sctp_bind_addr;
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struct sctp_ulpq;
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struct sctp_ep_common;
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struct sctp_ssnmap;
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2006-08-19 23:07:14 -06:00
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struct crypto_hash;
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2005-04-16 16:20:36 -06:00
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#include <net/sctp/tsnmap.h>
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#include <net/sctp/ulpevent.h>
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#include <net/sctp/ulpqueue.h>
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/* Structures useful for managing bind/connect. */
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struct sctp_bind_bucket {
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unsigned short port;
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unsigned short fastreuse;
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2007-11-09 09:43:40 -07:00
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struct hlist_node node;
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2005-04-16 16:20:36 -06:00
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struct hlist_head owner;
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2012-08-06 02:39:38 -06:00
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struct net *net;
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2005-04-16 16:20:36 -06:00
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};
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struct sctp_bind_hashbucket {
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spinlock_t lock;
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2007-11-09 09:43:40 -07:00
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struct hlist_head chain;
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2005-04-16 16:20:36 -06:00
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};
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/* Used for hashing all associations. */
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struct sctp_hashbucket {
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rwlock_t lock;
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2007-11-09 09:43:40 -07:00
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struct hlist_head chain;
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2005-04-16 16:20:36 -06:00
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} __attribute__((__aligned__(8)));
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/* The SCTP globals structure. */
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extern struct sctp_globals {
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/* The following variables are implementation specific. */
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/* Default initialization values to be applied to new associations. */
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__u16 max_instreams;
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__u16 max_outstreams;
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/* This is a list of groups of functions for each address
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* family that we support.
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*/
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struct list_head address_families;
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/* This is the hash of all endpoints. */
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int ep_hashsize;
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struct sctp_hashbucket *ep_hashtable;
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/* This is the hash of all associations. */
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int assoc_hashsize;
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struct sctp_hashbucket *assoc_hashtable;
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/* This is the sctp port control hash. */
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int port_hashsize;
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struct sctp_bind_hashbucket *port_hashtable;
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sctp: Allow to disable SCTP checksums via module parameter
This is a new version of my patch, now using a module parameter instead
of a sysctl, so that the option is harder to find. Please note that,
once the module is loaded, it is still possible to change the value of
the parameter in /sys/module/sctp/parameters/, which is useful if you
want to do performance comparisons without rebooting.
Computation of SCTP checksums significantly affects the performance of
SCTP. For example, using two dual-Opteron 246 connected using a Gbe
network, it was not possible to achieve more than ~730 Mbps, compared to
941 Mbps after disabling SCTP checksums.
Unfortunately, SCTP checksum offloading in NICs is not commonly
available (yet).
By default, checksums are still enabled, of course.
Signed-off-by: Lucas Nussbaum <lucas.nussbaum@ens-lyon.fr>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-13 01:33:41 -07:00
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/* Flag to indicate whether computing and verifying checksum
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* is disabled. */
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2011-12-19 07:08:01 -07:00
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bool checksum_disable;
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2005-04-16 16:20:36 -06:00
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} sctp_globals;
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#define sctp_max_instreams (sctp_globals.max_instreams)
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#define sctp_max_outstreams (sctp_globals.max_outstreams)
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#define sctp_address_families (sctp_globals.address_families)
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#define sctp_ep_hashsize (sctp_globals.ep_hashsize)
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#define sctp_ep_hashtable (sctp_globals.ep_hashtable)
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#define sctp_assoc_hashsize (sctp_globals.assoc_hashsize)
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#define sctp_assoc_hashtable (sctp_globals.assoc_hashtable)
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#define sctp_port_hashsize (sctp_globals.port_hashsize)
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#define sctp_port_hashtable (sctp_globals.port_hashtable)
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sctp: Allow to disable SCTP checksums via module parameter
This is a new version of my patch, now using a module parameter instead
of a sysctl, so that the option is harder to find. Please note that,
once the module is loaded, it is still possible to change the value of
the parameter in /sys/module/sctp/parameters/, which is useful if you
want to do performance comparisons without rebooting.
Computation of SCTP checksums significantly affects the performance of
SCTP. For example, using two dual-Opteron 246 connected using a Gbe
network, it was not possible to achieve more than ~730 Mbps, compared to
941 Mbps after disabling SCTP checksums.
Unfortunately, SCTP checksum offloading in NICs is not commonly
available (yet).
By default, checksums are still enabled, of course.
Signed-off-by: Lucas Nussbaum <lucas.nussbaum@ens-lyon.fr>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-13 01:33:41 -07:00
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#define sctp_checksum_disable (sctp_globals.checksum_disable)
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2005-04-16 16:20:36 -06:00
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/* SCTP Socket type: UDP or TCP style. */
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typedef enum {
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SCTP_SOCKET_UDP = 0,
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SCTP_SOCKET_UDP_HIGH_BANDWIDTH,
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SCTP_SOCKET_TCP
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} sctp_socket_type_t;
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/* Per socket SCTP information. */
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struct sctp_sock {
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/* inet_sock has to be the first member of sctp_sock */
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struct inet_sock inet;
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/* What kind of a socket is this? */
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sctp_socket_type_t type;
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/* PF_ family specific functions. */
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struct sctp_pf *pf;
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/* Access to HMAC transform. */
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2006-08-19 23:07:14 -06:00
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struct crypto_hash *hmac;
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2012-10-24 03:20:03 -06:00
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char *sctp_hmac_alg;
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2005-04-16 16:20:36 -06:00
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/* What is our base endpointer? */
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struct sctp_endpoint *ep;
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struct sctp_bind_bucket *bind_hash;
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/* Various Socket Options. */
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__u16 default_stream;
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__u32 default_ppid;
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__u16 default_flags;
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__u32 default_context;
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__u32 default_timetolive;
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2006-12-13 17:34:22 -07:00
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__u32 default_rcv_context;
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2007-03-23 12:34:36 -06:00
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int max_burst;
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2005-04-16 16:20:36 -06:00
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2005-12-22 12:36:46 -07:00
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/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
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* the destination address every heartbeat interval. This value
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* will be inherited by all new associations.
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*/
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__u32 hbinterval;
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/* This is the max_retrans value for new associations. */
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__u16 pathmaxrxt;
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/* The initial Path MTU to use for new associations. */
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__u32 pathmtu;
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/* The default SACK delay timeout for new associations. */
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__u32 sackdelay;
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2008-05-09 16:13:26 -06:00
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__u32 sackfreq;
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2005-12-22 12:36:46 -07:00
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2007-12-20 14:56:32 -07:00
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/* Flags controlling Heartbeat, SACK delay, and Path MTU Discovery. */
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2005-12-22 12:36:46 -07:00
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__u32 param_flags;
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2005-04-16 16:20:36 -06:00
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struct sctp_initmsg initmsg;
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struct sctp_rtoinfo rtoinfo;
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struct sctp_paddrparams paddrparam;
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struct sctp_event_subscribe subscribe;
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struct sctp_assocparams assocparams;
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int user_frag;
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__u32 autoclose;
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__u8 nodelay;
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__u8 disable_fragments;
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__u8 v4mapped;
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2007-04-20 13:23:15 -06:00
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__u8 frag_interleave;
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2006-12-20 17:07:04 -07:00
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__u32 adaptation_ind;
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2007-03-23 12:32:00 -06:00
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__u32 pd_point;
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2005-04-16 16:20:36 -06:00
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2007-04-20 13:23:15 -06:00
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atomic_t pd_mode;
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2005-04-16 16:20:36 -06:00
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/* Receive to here while partial delivery is in effect. */
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struct sk_buff_head pd_lobby;
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2011-04-26 04:32:51 -06:00
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struct list_head auto_asconf_list;
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int do_auto_asconf;
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2005-04-16 16:20:36 -06:00
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};
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static inline struct sctp_sock *sctp_sk(const struct sock *sk)
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{
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return (struct sctp_sock *)sk;
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}
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static inline struct sock *sctp_opt2sk(const struct sctp_sock *sp)
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{
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return (struct sock *)sp;
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}
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2011-12-10 02:48:31 -07:00
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#if IS_ENABLED(CONFIG_IPV6)
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2005-04-16 16:20:36 -06:00
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struct sctp6_sock {
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struct sctp_sock sctp;
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struct ipv6_pinfo inet6;
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};
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#endif /* CONFIG_IPV6 */
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/* This is our APPLICATION-SPECIFIC state cookie.
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* THIS IS NOT DICTATED BY THE SPECIFICATION.
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*/
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/* These are the parts of an association which we send in the cookie.
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* Most of these are straight out of:
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* RFC2960 12.2 Parameters necessary per association (i.e. the TCB)
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*
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*/
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struct sctp_cookie {
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/* My : Tag expected in every inbound packet and sent
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* Verification: in the INIT or INIT ACK chunk.
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* Tag :
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*/
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__u32 my_vtag;
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/* Peer's : Tag expected in every outbound packet except
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* Verification: in the INIT chunk.
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* Tag :
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*/
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__u32 peer_vtag;
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/* The rest of these are not from the spec, but really need to
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* be in the cookie.
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*/
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/* My Tie Tag : Assist in discovering a restarting association. */
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__u32 my_ttag;
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/* Peer's Tie Tag: Assist in discovering a restarting association. */
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__u32 peer_ttag;
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/* When does this cookie expire? */
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struct timeval expiration;
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/* Number of inbound/outbound streams which are set
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* and negotiated during the INIT process.
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*/
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__u16 sinit_num_ostreams;
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__u16 sinit_max_instreams;
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/* This is the first sequence number I used. */
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__u32 initial_tsn;
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/* This holds the originating address of the INIT packet. */
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union sctp_addr peer_addr;
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/* IG Section 2.35.3
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* Include the source port of the INIT-ACK
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*/
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__u16 my_port;
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__u8 prsctp_capable;
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|
|
|
/* Padding for future use */
|
|
|
|
__u8 padding;
|
|
|
|
|
2006-12-20 17:07:04 -07:00
|
|
|
__u32 adaptation_ind;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-10-09 02:15:59 -06:00
|
|
|
__u8 auth_random[sizeof(sctp_paramhdr_t) + SCTP_AUTH_RANDOM_LENGTH];
|
2011-03-31 17:38:54 -06:00
|
|
|
__u8 auth_hmacs[SCTP_AUTH_NUM_HMACS * sizeof(__u16) + 2];
|
2007-10-09 02:15:59 -06:00
|
|
|
__u8 auth_chunks[sizeof(sctp_paramhdr_t) + SCTP_AUTH_MAX_CHUNKS];
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* This is a shim for my peer's INIT packet, followed by
|
|
|
|
* a copy of the raw address list of the association.
|
|
|
|
* The length of the raw address list is saved in the
|
|
|
|
* raw_addr_list_len field, which will be used at the time when
|
|
|
|
* the association TCB is re-constructed from the cookie.
|
|
|
|
*/
|
|
|
|
__u32 raw_addr_list_len;
|
|
|
|
struct sctp_init_chunk peer_init[0];
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* The format of our cookie that we send to our peer. */
|
|
|
|
struct sctp_signed_cookie {
|
|
|
|
__u8 signature[SCTP_SECRET_SIZE];
|
2006-01-17 12:52:12 -07:00
|
|
|
__u32 __pad; /* force sctp_cookie alignment to 64 bits */
|
2005-04-16 16:20:36 -06:00
|
|
|
struct sctp_cookie c;
|
2010-06-03 04:21:52 -06:00
|
|
|
} __packed;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* This is another convenience type to allocate memory for address
|
|
|
|
* params for the maximum size and pass such structures around
|
|
|
|
* internally.
|
|
|
|
*/
|
|
|
|
union sctp_addr_param {
|
2007-09-19 03:19:52 -06:00
|
|
|
struct sctp_paramhdr p;
|
2005-04-16 16:20:36 -06:00
|
|
|
struct sctp_ipv4addr_param v4;
|
|
|
|
struct sctp_ipv6addr_param v6;
|
|
|
|
};
|
|
|
|
|
|
|
|
/* A convenience type to allow walking through the various
|
|
|
|
* parameters and avoid casting all over the place.
|
|
|
|
*/
|
|
|
|
union sctp_params {
|
|
|
|
void *v;
|
|
|
|
struct sctp_paramhdr *p;
|
|
|
|
struct sctp_cookie_preserve_param *life;
|
|
|
|
struct sctp_hostname_param *dns;
|
|
|
|
struct sctp_cookie_param *cookie;
|
|
|
|
struct sctp_supported_addrs_param *sat;
|
|
|
|
struct sctp_ipv4addr_param *v4;
|
|
|
|
struct sctp_ipv6addr_param *v6;
|
|
|
|
union sctp_addr_param *addr;
|
2006-12-20 17:07:04 -07:00
|
|
|
struct sctp_adaptation_ind_param *aind;
|
2007-09-16 16:53:56 -06:00
|
|
|
struct sctp_supported_ext_param *ext;
|
2007-10-09 02:15:59 -06:00
|
|
|
struct sctp_random_param *random;
|
|
|
|
struct sctp_chunks_param *chunks;
|
|
|
|
struct sctp_hmac_algo_param *hmac_algo;
|
2007-12-20 15:10:00 -07:00
|
|
|
struct sctp_addip_param *addip;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
/* RFC 2960. Section 3.3.5 Heartbeat.
|
|
|
|
* Heartbeat Information: variable length
|
|
|
|
* The Sender-specific Heartbeat Info field should normally include
|
|
|
|
* information about the sender's current time when this HEARTBEAT
|
|
|
|
* chunk is sent and the destination transport address to which this
|
|
|
|
* HEARTBEAT is sent (see Section 8.3).
|
|
|
|
*/
|
|
|
|
typedef struct sctp_sender_hb_info {
|
|
|
|
struct sctp_paramhdr param_hdr;
|
|
|
|
union sctp_addr daddr;
|
|
|
|
unsigned long sent_at;
|
2006-07-21 15:48:50 -06:00
|
|
|
__u64 hb_nonce;
|
2010-06-03 04:21:52 -06:00
|
|
|
} __packed sctp_sender_hb_info_t;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* RFC 2960 1.3.2 Sequenced Delivery within Streams
|
|
|
|
*
|
|
|
|
* The term "stream" is used in SCTP to refer to a sequence of user
|
|
|
|
* messages that are to be delivered to the upper-layer protocol in
|
|
|
|
* order with respect to other messages within the same stream. This is
|
|
|
|
* in contrast to its usage in TCP, where it refers to a sequence of
|
|
|
|
* bytes (in this document a byte is assumed to be eight bits).
|
|
|
|
* ...
|
|
|
|
*
|
|
|
|
* This is the structure we use to track both our outbound and inbound
|
|
|
|
* SSN, or Stream Sequence Numbers.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct sctp_stream {
|
|
|
|
__u16 *ssn;
|
|
|
|
unsigned int len;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct sctp_ssnmap {
|
|
|
|
struct sctp_stream in;
|
|
|
|
struct sctp_stream out;
|
|
|
|
};
|
|
|
|
|
2005-07-11 21:57:47 -06:00
|
|
|
struct sctp_ssnmap *sctp_ssnmap_new(__u16 in, __u16 out,
|
2005-10-07 00:46:04 -06:00
|
|
|
gfp_t gfp);
|
2005-04-16 16:20:36 -06:00
|
|
|
void sctp_ssnmap_free(struct sctp_ssnmap *map);
|
|
|
|
void sctp_ssnmap_clear(struct sctp_ssnmap *map);
|
|
|
|
|
|
|
|
/* What is the current SSN number for this stream? */
|
|
|
|
static inline __u16 sctp_ssn_peek(struct sctp_stream *stream, __u16 id)
|
|
|
|
{
|
|
|
|
return stream->ssn[id];
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Return the next SSN number for this stream. */
|
|
|
|
static inline __u16 sctp_ssn_next(struct sctp_stream *stream, __u16 id)
|
|
|
|
{
|
|
|
|
return stream->ssn[id]++;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Skip over this ssn and all below. */
|
|
|
|
static inline void sctp_ssn_skip(struct sctp_stream *stream, __u16 id,
|
|
|
|
__u16 ssn)
|
|
|
|
{
|
|
|
|
stream->ssn[id] = ssn+1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Pointers to address related SCTP functions.
|
|
|
|
* (i.e. things that depend on the address family.)
|
|
|
|
*/
|
|
|
|
struct sctp_af {
|
|
|
|
int (*sctp_xmit) (struct sk_buff *skb,
|
2008-08-03 22:15:08 -06:00
|
|
|
struct sctp_transport *);
|
2005-04-16 16:20:36 -06:00
|
|
|
int (*setsockopt) (struct sock *sk,
|
|
|
|
int level,
|
|
|
|
int optname,
|
|
|
|
char __user *optval,
|
2009-09-30 17:12:20 -06:00
|
|
|
unsigned int optlen);
|
2005-04-16 16:20:36 -06:00
|
|
|
int (*getsockopt) (struct sock *sk,
|
|
|
|
int level,
|
|
|
|
int optname,
|
|
|
|
char __user *optval,
|
|
|
|
int __user *optlen);
|
2006-03-20 23:45:21 -07:00
|
|
|
int (*compat_setsockopt) (struct sock *sk,
|
|
|
|
int level,
|
|
|
|
int optname,
|
|
|
|
char __user *optval,
|
2009-09-30 17:12:20 -06:00
|
|
|
unsigned int optlen);
|
2006-03-20 23:45:21 -07:00
|
|
|
int (*compat_getsockopt) (struct sock *sk,
|
|
|
|
int level,
|
|
|
|
int optname,
|
|
|
|
char __user *optval,
|
|
|
|
int __user *optlen);
|
2011-04-26 15:54:17 -06:00
|
|
|
void (*get_dst) (struct sctp_transport *t,
|
2011-04-26 15:51:31 -06:00
|
|
|
union sctp_addr *saddr,
|
|
|
|
struct flowi *fl,
|
|
|
|
struct sock *sk);
|
2008-05-29 04:55:05 -06:00
|
|
|
void (*get_saddr) (struct sctp_sock *sk,
|
2011-04-26 15:51:31 -06:00
|
|
|
struct sctp_transport *t,
|
|
|
|
struct flowi *fl);
|
2005-04-16 16:20:36 -06:00
|
|
|
void (*copy_addrlist) (struct list_head *,
|
|
|
|
struct net_device *);
|
|
|
|
int (*cmp_addr) (const union sctp_addr *addr1,
|
|
|
|
const union sctp_addr *addr2);
|
|
|
|
void (*addr_copy) (union sctp_addr *dst,
|
|
|
|
union sctp_addr *src);
|
|
|
|
void (*from_skb) (union sctp_addr *,
|
|
|
|
struct sk_buff *skb,
|
|
|
|
int saddr);
|
|
|
|
void (*from_sk) (union sctp_addr *,
|
|
|
|
struct sock *sk);
|
|
|
|
void (*to_sk_saddr) (union sctp_addr *,
|
|
|
|
struct sock *sk);
|
|
|
|
void (*to_sk_daddr) (union sctp_addr *,
|
|
|
|
struct sock *sk);
|
|
|
|
void (*from_addr_param) (union sctp_addr *,
|
|
|
|
union sctp_addr_param *,
|
2006-11-20 18:11:13 -07:00
|
|
|
__be16 port, int iif);
|
2005-04-16 16:20:36 -06:00
|
|
|
int (*to_addr_param) (const union sctp_addr *,
|
|
|
|
union sctp_addr_param *);
|
|
|
|
int (*addr_valid) (union sctp_addr *,
|
2006-06-17 23:55:35 -06:00
|
|
|
struct sctp_sock *,
|
|
|
|
const struct sk_buff *);
|
2005-04-16 16:20:36 -06:00
|
|
|
sctp_scope_t (*scope) (union sctp_addr *);
|
2006-11-20 18:24:53 -07:00
|
|
|
void (*inaddr_any) (union sctp_addr *, __be16);
|
2005-04-16 16:20:36 -06:00
|
|
|
int (*is_any) (const union sctp_addr *);
|
|
|
|
int (*available) (union sctp_addr *,
|
|
|
|
struct sctp_sock *);
|
|
|
|
int (*skb_iif) (const struct sk_buff *sk);
|
|
|
|
int (*is_ce) (const struct sk_buff *sk);
|
|
|
|
void (*seq_dump_addr)(struct seq_file *seq,
|
|
|
|
union sctp_addr *addr);
|
2008-06-04 13:40:15 -06:00
|
|
|
void (*ecn_capable)(struct sock *sk);
|
2005-04-16 16:20:36 -06:00
|
|
|
__u16 net_header_len;
|
|
|
|
int sockaddr_len;
|
|
|
|
sa_family_t sa_family;
|
|
|
|
struct list_head list;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct sctp_af *sctp_get_af_specific(sa_family_t);
|
|
|
|
int sctp_register_af(struct sctp_af *);
|
|
|
|
|
|
|
|
/* Protocol family functions. */
|
|
|
|
struct sctp_pf {
|
|
|
|
void (*event_msgname)(struct sctp_ulpevent *, char *, int *);
|
|
|
|
void (*skb_msgname) (struct sk_buff *, char *, int *);
|
|
|
|
int (*af_supported) (sa_family_t, struct sctp_sock *);
|
|
|
|
int (*cmp_addr) (const union sctp_addr *,
|
|
|
|
const union sctp_addr *,
|
|
|
|
struct sctp_sock *);
|
|
|
|
int (*bind_verify) (struct sctp_sock *, union sctp_addr *);
|
|
|
|
int (*send_verify) (struct sctp_sock *, union sctp_addr *);
|
2006-11-20 18:25:49 -07:00
|
|
|
int (*supported_addrs)(const struct sctp_sock *, __be16 *);
|
2005-04-16 16:20:36 -06:00
|
|
|
struct sock *(*create_accept_sk) (struct sock *sk,
|
|
|
|
struct sctp_association *asoc);
|
|
|
|
void (*addr_v4map) (struct sctp_sock *, union sctp_addr *);
|
|
|
|
struct sctp_af *af;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* Structure to track chunk fragments that have been acked, but peer
|
|
|
|
* fragments of the same message have not.
|
|
|
|
*/
|
|
|
|
struct sctp_datamsg {
|
|
|
|
/* Chunks waiting to be submitted to lower layer. */
|
|
|
|
struct list_head chunks;
|
|
|
|
/* Reference counting. */
|
|
|
|
atomic_t refcnt;
|
|
|
|
/* When is this message no longer interesting to the peer? */
|
|
|
|
unsigned long expires_at;
|
|
|
|
/* Did the messenge fail to send? */
|
|
|
|
int send_error;
|
2010-04-30 20:41:10 -06:00
|
|
|
u8 send_failed:1,
|
|
|
|
can_abandon:1, /* can chunks from this message can be abandoned. */
|
|
|
|
can_delay; /* should this message be Nagle delayed */
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *,
|
|
|
|
struct sctp_sndrcvinfo *,
|
|
|
|
struct msghdr *, int len);
|
2009-08-10 11:51:03 -06:00
|
|
|
void sctp_datamsg_free(struct sctp_datamsg *);
|
2005-04-16 16:20:36 -06:00
|
|
|
void sctp_datamsg_put(struct sctp_datamsg *);
|
|
|
|
void sctp_chunk_fail(struct sctp_chunk *, int error);
|
|
|
|
int sctp_chunk_abandoned(struct sctp_chunk *);
|
|
|
|
|
|
|
|
/* RFC2960 1.4 Key Terms
|
|
|
|
*
|
|
|
|
* o Chunk: A unit of information within an SCTP packet, consisting of
|
|
|
|
* a chunk header and chunk-specific content.
|
|
|
|
*
|
|
|
|
* As a matter of convenience, we remember the SCTP common header for
|
|
|
|
* each chunk as well as a few other header pointers...
|
|
|
|
*/
|
|
|
|
struct sctp_chunk {
|
2005-07-08 22:47:49 -06:00
|
|
|
struct list_head list;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
atomic_t refcnt;
|
|
|
|
|
|
|
|
/* This is our link to the per-transport transmitted list. */
|
|
|
|
struct list_head transmitted_list;
|
|
|
|
|
|
|
|
/* This field is used by chunks that hold fragmented data.
|
|
|
|
* For the first fragment this is the list that holds the rest of
|
|
|
|
* fragments. For the remaining fragments, this is the link to the
|
|
|
|
* frag_list maintained in the first fragment.
|
|
|
|
*/
|
|
|
|
struct list_head frag_list;
|
|
|
|
|
|
|
|
/* This points to the sk_buff containing the actual data. */
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
/* These are the SCTP headers by reverse order in a packet.
|
|
|
|
* Note that some of these may happen more than once. In that
|
|
|
|
* case, we point at the "current" one, whatever that means
|
|
|
|
* for that level of header.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* We point this at the FIRST TLV parameter to chunk_hdr. */
|
|
|
|
union sctp_params param_hdr;
|
|
|
|
union {
|
|
|
|
__u8 *v;
|
|
|
|
struct sctp_datahdr *data_hdr;
|
|
|
|
struct sctp_inithdr *init_hdr;
|
|
|
|
struct sctp_sackhdr *sack_hdr;
|
|
|
|
struct sctp_heartbeathdr *hb_hdr;
|
|
|
|
struct sctp_sender_hb_info *hbs_hdr;
|
|
|
|
struct sctp_shutdownhdr *shutdown_hdr;
|
|
|
|
struct sctp_signed_cookie *cookie_hdr;
|
|
|
|
struct sctp_ecnehdr *ecne_hdr;
|
|
|
|
struct sctp_cwrhdr *ecn_cwr_hdr;
|
|
|
|
struct sctp_errhdr *err_hdr;
|
|
|
|
struct sctp_addiphdr *addip_hdr;
|
|
|
|
struct sctp_fwdtsn_hdr *fwdtsn_hdr;
|
2007-10-09 02:15:59 -06:00
|
|
|
struct sctp_authhdr *auth_hdr;
|
2005-04-16 16:20:36 -06:00
|
|
|
} subh;
|
|
|
|
|
|
|
|
__u8 *chunk_end;
|
|
|
|
|
|
|
|
struct sctp_chunkhdr *chunk_hdr;
|
|
|
|
struct sctphdr *sctp_hdr;
|
|
|
|
|
|
|
|
/* This needs to be recoverable for SCTP_SEND_FAILED events. */
|
|
|
|
struct sctp_sndrcvinfo sinfo;
|
|
|
|
|
|
|
|
/* Which association does this belong to? */
|
|
|
|
struct sctp_association *asoc;
|
|
|
|
|
|
|
|
/* What endpoint received this chunk? */
|
|
|
|
struct sctp_ep_common *rcvr;
|
|
|
|
|
|
|
|
/* We fill this in if we are calculating RTT. */
|
|
|
|
unsigned long sent_at;
|
|
|
|
|
|
|
|
/* What is the origin IP address for this chunk? */
|
|
|
|
union sctp_addr source;
|
|
|
|
/* Destination address for this chunk. */
|
|
|
|
union sctp_addr dest;
|
|
|
|
|
|
|
|
/* For outbound message, track all fragments for SEND_FAILED. */
|
|
|
|
struct sctp_datamsg *msg;
|
|
|
|
|
|
|
|
/* For an inbound chunk, this tells us where it came from.
|
|
|
|
* For an outbound chunk, it tells us where we'd like it to
|
|
|
|
* go. It is NULL if we have no preference.
|
|
|
|
*/
|
|
|
|
struct sctp_transport *transport;
|
|
|
|
|
2007-10-03 18:51:34 -06:00
|
|
|
/* SCTP-AUTH: For the special case inbound processing of COOKIE-ECHO
|
|
|
|
* we need save a pointer to the AUTH chunk, since the SCTP-AUTH
|
|
|
|
* spec violates the principle premis that all chunks are processed
|
|
|
|
* in order.
|
|
|
|
*/
|
|
|
|
struct sk_buff *auth_chunk;
|
|
|
|
|
2008-07-25 10:44:09 -06:00
|
|
|
#define SCTP_CAN_FRTX 0x0
|
|
|
|
#define SCTP_NEED_FRTX 0x1
|
|
|
|
#define SCTP_DONT_FRTX 0x2
|
|
|
|
__u16 rtt_in_progress:1, /* This chunk used for RTT calc? */
|
|
|
|
has_tsn:1, /* Does this chunk have a TSN yet? */
|
|
|
|
has_ssn:1, /* Does this chunk have a SSN yet? */
|
|
|
|
singleton:1, /* Only chunk in the packet? */
|
|
|
|
end_of_packet:1, /* Last chunk in the packet? */
|
|
|
|
ecn_ce_done:1, /* Have we processed the ECN CE bit? */
|
|
|
|
pdiscard:1, /* Discard the whole packet now? */
|
|
|
|
tsn_gap_acked:1, /* Is this chunk acked by a GAP ACK? */
|
|
|
|
data_accepted:1, /* At least 1 chunk accepted */
|
|
|
|
auth:1, /* IN: was auth'ed | OUT: needs auth */
|
|
|
|
has_asconf:1, /* IN: have seen an asconf before */
|
|
|
|
tsn_missing_report:2, /* Data chunk missing counter. */
|
|
|
|
fast_retransmit:2; /* Is this chunk fast retransmitted? */
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
void sctp_chunk_hold(struct sctp_chunk *);
|
|
|
|
void sctp_chunk_put(struct sctp_chunk *);
|
|
|
|
int sctp_user_addto_chunk(struct sctp_chunk *chunk, int off, int len,
|
|
|
|
struct iovec *data);
|
|
|
|
void sctp_chunk_free(struct sctp_chunk *);
|
|
|
|
void *sctp_addto_chunk(struct sctp_chunk *, int len, const void *data);
|
sctp: Fix skb_over_panic resulting from multiple invalid parameter errors (CVE-2010-1173) (v4)
Ok, version 4
Change Notes:
1) Minor cleanups, from Vlads notes
Summary:
Hey-
Recently, it was reported to me that the kernel could oops in the
following way:
<5> kernel BUG at net/core/skbuff.c:91!
<5> invalid operand: 0000 [#1]
<5> Modules linked in: sctp netconsole nls_utf8 autofs4 sunrpc iptable_filter
ip_tables cpufreq_powersave parport_pc lp parport vmblock(U) vsock(U) vmci(U)
vmxnet(U) vmmemctl(U) vmhgfs(U) acpiphp dm_mirror dm_mod button battery ac md5
ipv6 uhci_hcd ehci_hcd snd_ens1371 snd_rawmidi snd_seq_device snd_pcm_oss
snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_ac97_codec snd soundcore
pcnet32 mii floppy ext3 jbd ata_piix libata mptscsih mptsas mptspi mptscsi
mptbase sd_mod scsi_mod
<5> CPU: 0
<5> EIP: 0060:[<c02bff27>] Not tainted VLI
<5> EFLAGS: 00010216 (2.6.9-89.0.25.EL)
<5> EIP is at skb_over_panic+0x1f/0x2d
<5> eax: 0000002c ebx: c033f461 ecx: c0357d96 edx: c040fd44
<5> esi: c033f461 edi: df653280 ebp: 00000000 esp: c040fd40
<5> ds: 007b es: 007b ss: 0068
<5> Process swapper (pid: 0, threadinfo=c040f000 task=c0370be0)
<5> Stack: c0357d96 e0c29478 00000084 00000004 c033f461 df653280 d7883180
e0c2947d
<5> 00000000 00000080 df653490 00000004 de4f1ac0 de4f1ac0 00000004
df653490
<5> 00000001 e0c2877a 08000800 de4f1ac0 df653490 00000000 e0c29d2e
00000004
<5> Call Trace:
<5> [<e0c29478>] sctp_addto_chunk+0xb0/0x128 [sctp]
<5> [<e0c2947d>] sctp_addto_chunk+0xb5/0x128 [sctp]
<5> [<e0c2877a>] sctp_init_cause+0x3f/0x47 [sctp]
<5> [<e0c29d2e>] sctp_process_unk_param+0xac/0xb8 [sctp]
<5> [<e0c29e90>] sctp_verify_init+0xcc/0x134 [sctp]
<5> [<e0c20322>] sctp_sf_do_5_1B_init+0x83/0x28e [sctp]
<5> [<e0c25333>] sctp_do_sm+0x41/0x77 [sctp]
<5> [<c01555a4>] cache_grow+0x140/0x233
<5> [<e0c26ba1>] sctp_endpoint_bh_rcv+0xc5/0x108 [sctp]
<5> [<e0c2b863>] sctp_inq_push+0xe/0x10 [sctp]
<5> [<e0c34600>] sctp_rcv+0x454/0x509 [sctp]
<5> [<e084e017>] ipt_hook+0x17/0x1c [iptable_filter]
<5> [<c02d005e>] nf_iterate+0x40/0x81
<5> [<c02e0bb9>] ip_local_deliver_finish+0x0/0x151
<5> [<c02e0c7f>] ip_local_deliver_finish+0xc6/0x151
<5> [<c02d0362>] nf_hook_slow+0x83/0xb5
<5> [<c02e0bb2>] ip_local_deliver+0x1a2/0x1a9
<5> [<c02e0bb9>] ip_local_deliver_finish+0x0/0x151
<5> [<c02e103e>] ip_rcv+0x334/0x3b4
<5> [<c02c66fd>] netif_receive_skb+0x320/0x35b
<5> [<e0a0928b>] init_stall_timer+0x67/0x6a [uhci_hcd]
<5> [<c02c67a4>] process_backlog+0x6c/0xd9
<5> [<c02c690f>] net_rx_action+0xfe/0x1f8
<5> [<c012a7b1>] __do_softirq+0x35/0x79
<5> [<c0107efb>] handle_IRQ_event+0x0/0x4f
<5> [<c01094de>] do_softirq+0x46/0x4d
Its an skb_over_panic BUG halt that results from processing an init chunk in
which too many of its variable length parameters are in some way malformed.
The problem is in sctp_process_unk_param:
if (NULL == *errp)
*errp = sctp_make_op_error_space(asoc, chunk,
ntohs(chunk->chunk_hdr->length));
if (*errp) {
sctp_init_cause(*errp, SCTP_ERROR_UNKNOWN_PARAM,
WORD_ROUND(ntohs(param.p->length)));
sctp_addto_chunk(*errp,
WORD_ROUND(ntohs(param.p->length)),
param.v);
When we allocate an error chunk, we assume that the worst case scenario requires
that we have chunk_hdr->length data allocated, which would be correct nominally,
given that we call sctp_addto_chunk for the violating parameter. Unfortunately,
we also, in sctp_init_cause insert a sctp_errhdr_t structure into the error
chunk, so the worst case situation in which all parameters are in violation
requires chunk_hdr->length+(sizeof(sctp_errhdr_t)*param_count) bytes of data.
The result of this error is that a deliberately malformed packet sent to a
listening host can cause a remote DOS, described in CVE-2010-1173:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2010-1173
I've tested the below fix and confirmed that it fixes the issue. We move to a
strategy whereby we allocate a fixed size error chunk and ignore errors we don't
have space to report. Tested by me successfully
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-28 04:30:59 -06:00
|
|
|
void *sctp_addto_chunk_fixed(struct sctp_chunk *, int len, const void *data);
|
2005-04-16 16:20:36 -06:00
|
|
|
struct sctp_chunk *sctp_chunkify(struct sk_buff *,
|
|
|
|
const struct sctp_association *,
|
|
|
|
struct sock *);
|
|
|
|
void sctp_init_addrs(struct sctp_chunk *, union sctp_addr *,
|
|
|
|
union sctp_addr *);
|
|
|
|
const union sctp_addr *sctp_source(const struct sctp_chunk *chunk);
|
|
|
|
|
2007-12-20 15:12:24 -07:00
|
|
|
enum {
|
|
|
|
SCTP_ADDR_NEW, /* new address added to assoc/ep */
|
|
|
|
SCTP_ADDR_SRC, /* address can be used as source */
|
|
|
|
SCTP_ADDR_DEL, /* address about to be deleted */
|
|
|
|
};
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* This is a structure for holding either an IPv6 or an IPv4 address. */
|
|
|
|
struct sctp_sockaddr_entry {
|
|
|
|
struct list_head list;
|
2007-09-16 17:02:12 -06:00
|
|
|
struct rcu_head rcu;
|
2005-04-16 16:20:36 -06:00
|
|
|
union sctp_addr a;
|
2007-12-20 15:12:24 -07:00
|
|
|
__u8 state;
|
2007-09-16 17:02:12 -06:00
|
|
|
__u8 valid;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2011-04-26 04:32:51 -06:00
|
|
|
#define SCTP_ADDRESS_TICK_DELAY 500
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
typedef struct sctp_chunk *(sctp_packet_phandler_t)(struct sctp_association *);
|
|
|
|
|
|
|
|
/* This structure holds lists of chunks as we are assembling for
|
|
|
|
* transmission.
|
|
|
|
*/
|
|
|
|
struct sctp_packet {
|
|
|
|
/* These are the SCTP header values (host order) for the packet. */
|
|
|
|
__u16 source_port;
|
|
|
|
__u16 destination_port;
|
|
|
|
__u32 vtag;
|
|
|
|
|
|
|
|
/* This contains the payload chunks. */
|
2005-07-08 22:47:49 -06:00
|
|
|
struct list_head chunk_list;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* This is the overhead of the sctp and ip headers. */
|
|
|
|
size_t overhead;
|
|
|
|
/* This is the total size of all chunks INCLUDING padding. */
|
|
|
|
size_t size;
|
|
|
|
|
|
|
|
/* The packet is destined for this transport address.
|
|
|
|
* The function we finally use to pass down to the next lower
|
|
|
|
* layer lives in the transport structure.
|
|
|
|
*/
|
|
|
|
struct sctp_transport *transport;
|
|
|
|
|
2007-10-09 02:15:59 -06:00
|
|
|
/* pointer to the auth chunk for this packet */
|
|
|
|
struct sctp_chunk *auth;
|
|
|
|
|
2009-09-04 16:21:01 -06:00
|
|
|
u8 has_cookie_echo:1, /* This packet contains a COOKIE-ECHO chunk. */
|
|
|
|
has_sack:1, /* This packet contains a SACK chunk. */
|
|
|
|
has_auth:1, /* This packet contains an AUTH chunk */
|
|
|
|
has_data:1, /* This packet contains at least 1 DATA chunk */
|
|
|
|
ipfragok:1, /* So let ip fragment this packet */
|
|
|
|
malloced:1; /* Is it malloced? */
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
struct sctp_packet *sctp_packet_init(struct sctp_packet *,
|
|
|
|
struct sctp_transport *,
|
|
|
|
__u16 sport, __u16 dport);
|
|
|
|
struct sctp_packet *sctp_packet_config(struct sctp_packet *, __u32 vtag, int);
|
|
|
|
sctp_xmit_t sctp_packet_transmit_chunk(struct sctp_packet *,
|
2008-06-19 17:08:18 -06:00
|
|
|
struct sctp_chunk *, int);
|
2005-04-16 16:20:36 -06:00
|
|
|
sctp_xmit_t sctp_packet_append_chunk(struct sctp_packet *,
|
|
|
|
struct sctp_chunk *);
|
|
|
|
int sctp_packet_transmit(struct sctp_packet *);
|
|
|
|
void sctp_packet_free(struct sctp_packet *);
|
|
|
|
|
|
|
|
static inline int sctp_packet_empty(struct sctp_packet *packet)
|
|
|
|
{
|
2010-09-22 14:43:57 -06:00
|
|
|
return packet->size == packet->overhead;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* This represents a remote transport address.
|
|
|
|
* For local transport addresses, we just use union sctp_addr.
|
|
|
|
*
|
|
|
|
* RFC2960 Section 1.4 Key Terms
|
|
|
|
*
|
|
|
|
* o Transport address: A Transport Address is traditionally defined
|
|
|
|
* by Network Layer address, Transport Layer protocol and Transport
|
|
|
|
* Layer port number. In the case of SCTP running over IP, a
|
|
|
|
* transport address is defined by the combination of an IP address
|
|
|
|
* and an SCTP port number (where SCTP is the Transport protocol).
|
|
|
|
*
|
|
|
|
* RFC2960 Section 7.1 SCTP Differences from TCP Congestion control
|
|
|
|
*
|
|
|
|
* o The sender keeps a separate congestion control parameter set for
|
|
|
|
* each of the destination addresses it can send to (not each
|
|
|
|
* source-destination pair but for each destination). The parameters
|
|
|
|
* should decay if the address is not used for a long enough time
|
|
|
|
* period.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
struct sctp_transport {
|
|
|
|
/* A list of transports. */
|
|
|
|
struct list_head transports;
|
|
|
|
|
|
|
|
/* Reference counting. */
|
|
|
|
atomic_t refcnt;
|
2010-05-26 01:40:11 -06:00
|
|
|
__u32 dead:1,
|
2010-04-30 20:41:09 -06:00
|
|
|
/* RTO-Pending : A flag used to track if one of the DATA
|
|
|
|
* chunks sent to this address is currently being
|
|
|
|
* used to compute a RTT. If this flag is 0,
|
|
|
|
* the next DATA chunk sent to this destination
|
|
|
|
* should be used to compute a RTT and this flag
|
|
|
|
* should be set. Every time the RTT
|
|
|
|
* calculation completes (i.e. the DATA chunk
|
|
|
|
* is SACK'd) clear this flag.
|
|
|
|
*/
|
|
|
|
rto_pending:1,
|
|
|
|
|
|
|
|
/*
|
|
|
|
* hb_sent : a flag that signals that we have a pending
|
|
|
|
* heartbeat.
|
|
|
|
*/
|
|
|
|
hb_sent:1,
|
|
|
|
|
|
|
|
/* Is the Path MTU update pending on this tranport */
|
|
|
|
pmtu_pending:1,
|
|
|
|
|
|
|
|
/* Is this structure kfree()able? */
|
|
|
|
malloced:1;
|
|
|
|
|
2012-06-29 21:04:26 -06:00
|
|
|
/* Has this transport moved the ctsn since we last sacked */
|
|
|
|
__u32 sack_generation;
|
|
|
|
|
2011-05-06 17:32:47 -06:00
|
|
|
struct flowi fl;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* This is the peer's IP address and port. */
|
|
|
|
union sctp_addr ipaddr;
|
|
|
|
|
|
|
|
/* These are the functions we call to handle LLP stuff. */
|
|
|
|
struct sctp_af *af_specific;
|
|
|
|
|
|
|
|
/* Which association do we belong to? */
|
|
|
|
struct sctp_association *asoc;
|
|
|
|
|
|
|
|
/* RFC2960
|
|
|
|
*
|
|
|
|
* 12.3 Per Transport Address Data
|
|
|
|
*
|
|
|
|
* For each destination transport address in the peer's
|
|
|
|
* address list derived from the INIT or INIT ACK chunk, a
|
|
|
|
* number of data elements needs to be maintained including:
|
|
|
|
*/
|
|
|
|
/* RTO : The current retransmission timeout value. */
|
2006-01-17 12:55:17 -07:00
|
|
|
unsigned long rto;
|
2007-10-24 13:59:16 -06:00
|
|
|
|
|
|
|
__u32 rtt; /* This is the most recent RTT. */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* RTTVAR : The current RTT variation. */
|
|
|
|
__u32 rttvar;
|
|
|
|
|
|
|
|
/* SRTT : The current smoothed round trip time. */
|
|
|
|
__u32 srtt;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* These are the congestion stats.
|
|
|
|
*/
|
|
|
|
/* cwnd : The current congestion window. */
|
|
|
|
__u32 cwnd; /* This is the actual cwnd. */
|
|
|
|
|
|
|
|
/* ssthresh : The current slow start threshold value. */
|
|
|
|
__u32 ssthresh;
|
|
|
|
|
|
|
|
/* partial : The tracking method for increase of cwnd when in
|
|
|
|
* bytes acked : congestion avoidance mode (see Section 6.2.2)
|
|
|
|
*/
|
|
|
|
__u32 partial_bytes_acked;
|
|
|
|
|
|
|
|
/* Data that has been sent, but not acknowledged. */
|
|
|
|
__u32 flight_size;
|
|
|
|
|
2009-11-23 13:54:00 -07:00
|
|
|
__u32 burst_limited; /* Holds old cwnd when max.burst is applied */
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Destination */
|
|
|
|
struct dst_entry *dst;
|
|
|
|
/* Source address. */
|
|
|
|
union sctp_addr saddr;
|
|
|
|
|
|
|
|
/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
|
|
|
|
* the destination address every heartbeat interval.
|
|
|
|
*/
|
2006-01-17 12:55:17 -07:00
|
|
|
unsigned long hbinterval;
|
2005-12-22 12:36:46 -07:00
|
|
|
|
|
|
|
/* SACK delay timeout */
|
2006-01-17 12:55:17 -07:00
|
|
|
unsigned long sackdelay;
|
2008-05-09 16:13:26 -06:00
|
|
|
__u32 sackfreq;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* When was the last time (in jiffies) that we heard from this
|
|
|
|
* transport? We use this to pick new active and retran paths.
|
|
|
|
*/
|
|
|
|
unsigned long last_time_heard;
|
|
|
|
|
|
|
|
/* Last time(in jiffies) when cwnd is reduced due to the congestion
|
|
|
|
* indication based on ECNE chunk.
|
|
|
|
*/
|
|
|
|
unsigned long last_time_ecne_reduced;
|
|
|
|
|
2006-01-17 12:55:17 -07:00
|
|
|
/* This is the max_retrans value for the transport and will
|
|
|
|
* be initialized from the assocs value. This can be changed
|
2012-07-21 01:56:07 -06:00
|
|
|
* using the SCTP_SET_PEER_ADDR_PARAMS socket option.
|
2006-01-17 12:55:17 -07:00
|
|
|
*/
|
|
|
|
__u16 pathmaxrxt;
|
|
|
|
|
2012-07-21 01:56:07 -06:00
|
|
|
/* This is the partially failed retrans value for the transport
|
|
|
|
* and will be initialized from the assocs value. This can be changed
|
|
|
|
* using the SCTP_PEER_ADDR_THLDS socket option
|
|
|
|
*/
|
|
|
|
int pf_retrans;
|
2006-01-17 12:55:17 -07:00
|
|
|
/* PMTU : The current known path MTU. */
|
|
|
|
__u32 pathmtu;
|
|
|
|
|
2007-12-20 14:56:32 -07:00
|
|
|
/* Flags controlling Heartbeat, SACK delay, and Path MTU Discovery. */
|
2006-01-17 12:55:17 -07:00
|
|
|
__u32 param_flags;
|
|
|
|
|
2005-06-20 14:14:57 -06:00
|
|
|
/* The number of times INIT has been sent on this transport. */
|
|
|
|
int init_sent_count;
|
|
|
|
|
|
|
|
/* state : The current state of this destination,
|
tree-wide: fix assorted typos all over the place
That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-11-14 08:09:05 -07:00
|
|
|
* : i.e. SCTP_ACTIVE, SCTP_INACTIVE, SCTP_UNKNOWN.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
2005-06-20 14:14:57 -06:00
|
|
|
int state;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* These are the error stats for this destination. */
|
|
|
|
|
|
|
|
/* Error count : The current error count for this destination. */
|
|
|
|
unsigned short error_count;
|
|
|
|
|
|
|
|
/* Per : A timer used by each destination.
|
|
|
|
* Destination :
|
|
|
|
* Timer :
|
|
|
|
*
|
|
|
|
* [Everywhere else in the text this is called T3-rtx. -ed]
|
|
|
|
*/
|
|
|
|
struct timer_list T3_rtx_timer;
|
|
|
|
|
|
|
|
/* Heartbeat timer is per destination. */
|
|
|
|
struct timer_list hb_timer;
|
|
|
|
|
2010-05-06 01:56:07 -06:00
|
|
|
/* Timer to handle ICMP proto unreachable envets */
|
|
|
|
struct timer_list proto_unreach_timer;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Since we're using per-destination retransmission timers
|
|
|
|
* (see above), we're also using per-destination "transmitted"
|
|
|
|
* queues. This probably ought to be a private struct
|
|
|
|
* accessible only within the outqueue, but it's not, yet.
|
|
|
|
*/
|
|
|
|
struct list_head transmitted;
|
|
|
|
|
|
|
|
/* We build bundle-able packets for this transport here. */
|
|
|
|
struct sctp_packet packet;
|
|
|
|
|
|
|
|
/* This is the list of transports that have chunks to send. */
|
|
|
|
struct list_head send_ready;
|
|
|
|
|
|
|
|
/* State information saved for SFR_CACC algorithm. The key
|
|
|
|
* idea in SFR_CACC is to maintain state at the sender on a
|
|
|
|
* per-destination basis when a changeover happens.
|
|
|
|
* char changeover_active;
|
|
|
|
* char cycling_changeover;
|
|
|
|
* __u32 next_tsn_at_change;
|
|
|
|
* char cacc_saw_newack;
|
|
|
|
*/
|
|
|
|
struct {
|
|
|
|
/* An unsigned integer, which stores the next TSN to be
|
|
|
|
* used by the sender, at the moment of changeover.
|
|
|
|
*/
|
|
|
|
__u32 next_tsn_at_change;
|
|
|
|
|
|
|
|
/* A flag which indicates the occurrence of a changeover */
|
|
|
|
char changeover_active;
|
|
|
|
|
|
|
|
/* A flag which indicates whether the change of primary is
|
|
|
|
* the first switch to this destination address during an
|
|
|
|
* active switch.
|
|
|
|
*/
|
|
|
|
char cycling_changeover;
|
|
|
|
|
|
|
|
/* A temporary flag, which is used during the processing of
|
|
|
|
* a SACK to estimate the causative TSN(s)'s group.
|
|
|
|
*/
|
|
|
|
char cacc_saw_newack;
|
|
|
|
} cacc;
|
2006-07-21 15:48:50 -06:00
|
|
|
|
|
|
|
/* 64-bit random number sent with heartbeat. */
|
|
|
|
__u64 hb_nonce;
|
2012-12-06 02:25:05 -07:00
|
|
|
|
|
|
|
struct rcu_head rcu;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2012-08-07 01:26:14 -06:00
|
|
|
struct sctp_transport *sctp_transport_new(struct net *, const union sctp_addr *,
|
2005-10-07 00:46:04 -06:00
|
|
|
gfp_t);
|
2005-04-16 16:20:36 -06:00
|
|
|
void sctp_transport_set_owner(struct sctp_transport *,
|
|
|
|
struct sctp_association *);
|
|
|
|
void sctp_transport_route(struct sctp_transport *, union sctp_addr *,
|
|
|
|
struct sctp_sock *);
|
2011-04-26 15:51:31 -06:00
|
|
|
void sctp_transport_pmtu(struct sctp_transport *, struct sock *sk);
|
2005-04-16 16:20:36 -06:00
|
|
|
void sctp_transport_free(struct sctp_transport *);
|
2010-04-30 20:41:09 -06:00
|
|
|
void sctp_transport_reset_timers(struct sctp_transport *);
|
2005-04-16 16:20:36 -06:00
|
|
|
void sctp_transport_hold(struct sctp_transport *);
|
|
|
|
void sctp_transport_put(struct sctp_transport *);
|
|
|
|
void sctp_transport_update_rto(struct sctp_transport *, __u32);
|
|
|
|
void sctp_transport_raise_cwnd(struct sctp_transport *, __u32, __u32);
|
|
|
|
void sctp_transport_lower_cwnd(struct sctp_transport *, sctp_lower_cwnd_t);
|
2009-11-23 13:54:00 -07:00
|
|
|
void sctp_transport_burst_limited(struct sctp_transport *);
|
|
|
|
void sctp_transport_burst_reset(struct sctp_transport *);
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned long sctp_transport_timeout(struct sctp_transport *);
|
2007-03-19 18:02:30 -06:00
|
|
|
void sctp_transport_reset(struct sctp_transport *);
|
2012-07-16 04:57:14 -06:00
|
|
|
void sctp_transport_update_pmtu(struct sock *, struct sctp_transport *, u32);
|
2011-06-16 20:03:23 -06:00
|
|
|
void sctp_transport_immediate_rtx(struct sctp_transport *);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
|
|
|
|
/* This is the structure we use to queue packets as they come into
|
|
|
|
* SCTP. We write packets to it and read chunks from it.
|
|
|
|
*/
|
|
|
|
struct sctp_inq {
|
|
|
|
/* This is actually a queue of sctp_chunk each
|
|
|
|
* containing a partially decoded packet.
|
|
|
|
*/
|
2005-07-08 22:47:49 -06:00
|
|
|
struct list_head in_chunk_list;
|
2005-04-16 16:20:36 -06:00
|
|
|
/* This is the packet which is currently off the in queue and is
|
|
|
|
* being worked on through the inbound chunk processing.
|
|
|
|
*/
|
|
|
|
struct sctp_chunk *in_progress;
|
|
|
|
|
|
|
|
/* This is the delayed task to finish delivering inbound
|
|
|
|
* messages.
|
|
|
|
*/
|
|
|
|
struct work_struct immediate;
|
|
|
|
};
|
|
|
|
|
|
|
|
void sctp_inq_init(struct sctp_inq *);
|
|
|
|
void sctp_inq_free(struct sctp_inq *);
|
|
|
|
void sctp_inq_push(struct sctp_inq *, struct sctp_chunk *packet);
|
|
|
|
struct sctp_chunk *sctp_inq_pop(struct sctp_inq *);
|
2007-10-03 18:51:34 -06:00
|
|
|
struct sctp_chunkhdr *sctp_inq_peek(struct sctp_inq *);
|
2006-11-22 07:57:56 -07:00
|
|
|
void sctp_inq_set_th_handler(struct sctp_inq *, work_func_t);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* This is the structure we use to hold outbound chunks. You push
|
|
|
|
* chunks in and they automatically pop out the other end as bundled
|
|
|
|
* packets (it calls (*output_handler)()).
|
|
|
|
*
|
|
|
|
* This structure covers sections 6.3, 6.4, 6.7, 6.8, 6.10, 7., 8.1,
|
|
|
|
* and 8.2 of the v13 draft.
|
|
|
|
*
|
|
|
|
* It handles retransmissions. The connection to the timeout portion
|
|
|
|
* of the state machine is through sctp_..._timeout() and timeout_handler.
|
|
|
|
*
|
|
|
|
* If you feed it SACKs, it will eat them.
|
|
|
|
*
|
|
|
|
* If you give it big chunks, it will fragment them.
|
|
|
|
*
|
|
|
|
* It assigns TSN's to data chunks. This happens at the last possible
|
|
|
|
* instant before transmission.
|
|
|
|
*
|
|
|
|
* When free()'d, it empties itself out via output_handler().
|
|
|
|
*/
|
|
|
|
struct sctp_outq {
|
|
|
|
struct sctp_association *asoc;
|
|
|
|
|
|
|
|
/* Data pending that has never been transmitted. */
|
2005-07-08 22:47:49 -06:00
|
|
|
struct list_head out_chunk_list;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2012-04-14 23:58:06 -06:00
|
|
|
unsigned int out_qlen; /* Total length of queued data chunks. */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Error of send failed, may used in SCTP_SEND_FAILED event. */
|
2012-04-14 23:58:06 -06:00
|
|
|
unsigned int error;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* These are control chunks we want to send. */
|
2005-07-08 22:47:49 -06:00
|
|
|
struct list_head control_chunk_list;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* These are chunks that have been sacked but are above the
|
|
|
|
* CTSN, or cumulative tsn ack point.
|
|
|
|
*/
|
|
|
|
struct list_head sacked;
|
|
|
|
|
|
|
|
/* Put chunks on this list to schedule them for
|
|
|
|
* retransmission.
|
|
|
|
*/
|
|
|
|
struct list_head retransmit;
|
|
|
|
|
|
|
|
/* Put chunks on this list to save them for FWD TSN processing as
|
|
|
|
* they were abandoned.
|
|
|
|
*/
|
|
|
|
struct list_head abandoned;
|
|
|
|
|
|
|
|
/* How many unackd bytes do we have in-flight? */
|
|
|
|
__u32 outstanding_bytes;
|
|
|
|
|
2008-06-04 13:39:11 -06:00
|
|
|
/* Are we doing fast-rtx on this queue */
|
|
|
|
char fast_rtx;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Corked? */
|
|
|
|
char cork;
|
|
|
|
|
|
|
|
/* Is this structure empty? */
|
|
|
|
char empty;
|
|
|
|
};
|
|
|
|
|
|
|
|
void sctp_outq_init(struct sctp_association *, struct sctp_outq *);
|
|
|
|
void sctp_outq_teardown(struct sctp_outq *);
|
|
|
|
void sctp_outq_free(struct sctp_outq*);
|
|
|
|
int sctp_outq_tail(struct sctp_outq *, struct sctp_chunk *chunk);
|
2012-10-02 23:43:22 -06:00
|
|
|
int sctp_outq_sack(struct sctp_outq *, struct sctp_chunk *);
|
2005-04-16 16:20:36 -06:00
|
|
|
int sctp_outq_is_empty(const struct sctp_outq *);
|
|
|
|
void sctp_outq_restart(struct sctp_outq *);
|
|
|
|
|
|
|
|
void sctp_retransmit(struct sctp_outq *, struct sctp_transport *,
|
|
|
|
sctp_retransmit_reason_t);
|
|
|
|
void sctp_retransmit_mark(struct sctp_outq *, struct sctp_transport *, __u8);
|
|
|
|
int sctp_outq_uncork(struct sctp_outq *);
|
|
|
|
/* Uncork and flush an outqueue. */
|
|
|
|
static inline void sctp_outq_cork(struct sctp_outq *q)
|
|
|
|
{
|
|
|
|
q->cork = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* These bind address data fields common between endpoints and associations */
|
|
|
|
struct sctp_bind_addr {
|
|
|
|
|
|
|
|
/* RFC 2960 12.1 Parameters necessary for the SCTP instance
|
|
|
|
*
|
|
|
|
* SCTP Port: The local SCTP port number the endpoint is
|
|
|
|
* bound to.
|
|
|
|
*/
|
|
|
|
__u16 port;
|
|
|
|
|
|
|
|
/* RFC 2960 12.1 Parameters necessary for the SCTP instance
|
|
|
|
*
|
|
|
|
* Address List: The list of IP addresses that this instance
|
|
|
|
* has bound. This information is passed to one's
|
|
|
|
* peer(s) in INIT and INIT ACK chunks.
|
|
|
|
*/
|
|
|
|
struct list_head address_list;
|
|
|
|
|
|
|
|
int malloced; /* Are we kfree()able? */
|
|
|
|
};
|
|
|
|
|
|
|
|
void sctp_bind_addr_init(struct sctp_bind_addr *, __u16 port);
|
|
|
|
void sctp_bind_addr_free(struct sctp_bind_addr *);
|
2012-08-06 02:42:04 -06:00
|
|
|
int sctp_bind_addr_copy(struct net *net, struct sctp_bind_addr *dest,
|
2005-04-16 16:20:36 -06:00
|
|
|
const struct sctp_bind_addr *src,
|
2005-10-07 00:46:04 -06:00
|
|
|
sctp_scope_t scope, gfp_t gfp,
|
2005-07-11 21:57:47 -06:00
|
|
|
int flags);
|
2007-12-06 23:50:54 -07:00
|
|
|
int sctp_bind_addr_dup(struct sctp_bind_addr *dest,
|
|
|
|
const struct sctp_bind_addr *src,
|
|
|
|
gfp_t gfp);
|
2005-04-16 16:20:36 -06:00
|
|
|
int sctp_add_bind_addr(struct sctp_bind_addr *, union sctp_addr *,
|
2007-12-20 15:12:24 -07:00
|
|
|
__u8 addr_state, gfp_t gfp);
|
2007-10-24 14:10:00 -06:00
|
|
|
int sctp_del_bind_addr(struct sctp_bind_addr *, union sctp_addr *);
|
2005-04-16 16:20:36 -06:00
|
|
|
int sctp_bind_addr_match(struct sctp_bind_addr *, const union sctp_addr *,
|
|
|
|
struct sctp_sock *);
|
2008-07-19 00:05:40 -06:00
|
|
|
int sctp_bind_addr_conflict(struct sctp_bind_addr *, const union sctp_addr *,
|
|
|
|
struct sctp_sock *, struct sctp_sock *);
|
2007-12-20 15:12:59 -07:00
|
|
|
int sctp_bind_addr_state(const struct sctp_bind_addr *bp,
|
|
|
|
const union sctp_addr *addr);
|
2005-04-16 16:20:36 -06:00
|
|
|
union sctp_addr *sctp_find_unmatch_addr(struct sctp_bind_addr *bp,
|
|
|
|
const union sctp_addr *addrs,
|
|
|
|
int addrcnt,
|
|
|
|
struct sctp_sock *opt);
|
|
|
|
union sctp_params sctp_bind_addrs_to_raw(const struct sctp_bind_addr *bp,
|
2005-07-11 21:57:47 -06:00
|
|
|
int *addrs_len,
|
2005-10-07 00:46:04 -06:00
|
|
|
gfp_t gfp);
|
2005-04-16 16:20:36 -06:00
|
|
|
int sctp_raw_to_bind_addrs(struct sctp_bind_addr *bp, __u8 *raw, int len,
|
2005-10-07 00:46:04 -06:00
|
|
|
__u16 port, gfp_t gfp);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
sctp_scope_t sctp_scope(const union sctp_addr *);
|
2012-08-07 01:27:02 -06:00
|
|
|
int sctp_in_scope(struct net *net, const union sctp_addr *addr, const sctp_scope_t scope);
|
2008-08-18 08:34:34 -06:00
|
|
|
int sctp_is_any(struct sock *sk, const union sctp_addr *addr);
|
2005-04-16 16:20:36 -06:00
|
|
|
int sctp_addr_is_valid(const union sctp_addr *addr);
|
2011-04-26 04:32:51 -06:00
|
|
|
int sctp_is_ep_boundall(struct sock *sk);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
|
|
|
|
/* What type of endpoint? */
|
|
|
|
typedef enum {
|
|
|
|
SCTP_EP_TYPE_SOCKET,
|
|
|
|
SCTP_EP_TYPE_ASSOCIATION,
|
|
|
|
} sctp_endpoint_type_t;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* A common base class to bridge the implmentation view of a
|
|
|
|
* socket (usually listening) endpoint versus an association's
|
|
|
|
* local endpoint.
|
|
|
|
* This common structure is useful for several purposes:
|
|
|
|
* 1) Common interface for lookup routines.
|
|
|
|
* a) Subfunctions work for either endpoint or association
|
|
|
|
* b) Single interface to lookup allows hiding the lookup lock rather
|
|
|
|
* than acquiring it externally.
|
|
|
|
* 2) Common interface for the inbound chunk handling/state machine.
|
|
|
|
* 3) Common object handling routines for reference counting, etc.
|
|
|
|
* 4) Disentangle association lookup from endpoint lookup, where we
|
|
|
|
* do not have to find our endpoint to find our association.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct sctp_ep_common {
|
|
|
|
/* Fields to help us manage our entries in the hash tables. */
|
2007-11-09 09:43:40 -07:00
|
|
|
struct hlist_node node;
|
2005-04-16 16:20:36 -06:00
|
|
|
int hashent;
|
|
|
|
|
|
|
|
/* Runtime type information. What kind of endpoint is this? */
|
|
|
|
sctp_endpoint_type_t type;
|
|
|
|
|
|
|
|
/* Some fields to help us manage this object.
|
|
|
|
* refcnt - Reference count access to this object.
|
|
|
|
* dead - Do not attempt to use this object.
|
|
|
|
*/
|
|
|
|
atomic_t refcnt;
|
2013-04-14 21:27:18 -06:00
|
|
|
bool dead;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* What socket does this endpoint belong to? */
|
|
|
|
struct sock *sk;
|
|
|
|
|
|
|
|
/* This is where we receive inbound chunks. */
|
|
|
|
struct sctp_inq inqueue;
|
|
|
|
|
|
|
|
/* This substructure includes the defining parameters of the
|
|
|
|
* endpoint:
|
|
|
|
* bind_addr.port is our shared port number.
|
|
|
|
* bind_addr.address_list is our set of local IP addresses.
|
|
|
|
*/
|
|
|
|
struct sctp_bind_addr bind_addr;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* RFC Section 1.4 Key Terms
|
|
|
|
*
|
|
|
|
* o SCTP endpoint: The logical sender/receiver of SCTP packets. On a
|
|
|
|
* multi-homed host, an SCTP endpoint is represented to its peers as a
|
|
|
|
* combination of a set of eligible destination transport addresses to
|
|
|
|
* which SCTP packets can be sent and a set of eligible source
|
|
|
|
* transport addresses from which SCTP packets can be received.
|
|
|
|
* All transport addresses used by an SCTP endpoint must use the
|
|
|
|
* same port number, but can use multiple IP addresses. A transport
|
|
|
|
* address used by an SCTP endpoint must not be used by another
|
|
|
|
* SCTP endpoint. In other words, a transport address is unique
|
|
|
|
* to an SCTP endpoint.
|
|
|
|
*
|
|
|
|
* From an implementation perspective, each socket has one of these.
|
|
|
|
* A TCP-style socket will have exactly one association on one of
|
|
|
|
* these. An UDP-style socket will have multiple associations hanging
|
|
|
|
* off one of these.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct sctp_endpoint {
|
|
|
|
/* Common substructure for endpoint and association. */
|
|
|
|
struct sctp_ep_common base;
|
|
|
|
|
|
|
|
/* Associations: A list of current associations and mappings
|
|
|
|
* to the data consumers for each association. This
|
|
|
|
* may be in the form of a hash table or other
|
|
|
|
* implementation dependent structure. The data
|
|
|
|
* consumers may be process identification
|
|
|
|
* information such as file descriptors, named pipe
|
|
|
|
* pointer, or table pointers dependent on how SCTP
|
|
|
|
* is implemented.
|
|
|
|
*/
|
|
|
|
/* This is really a list of struct sctp_association entries. */
|
|
|
|
struct list_head asocs;
|
|
|
|
|
|
|
|
/* Secret Key: A secret key used by this endpoint to compute
|
|
|
|
* the MAC. This SHOULD be a cryptographic quality
|
|
|
|
* random number with a sufficient length.
|
|
|
|
* Discussion in [RFC1750] can be helpful in
|
|
|
|
* selection of the key.
|
|
|
|
*/
|
2013-02-11 22:15:33 -07:00
|
|
|
__u8 secret_key[SCTP_SECRET_SIZE];
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-01-17 12:55:57 -07:00
|
|
|
/* digest: This is a digest of the sctp cookie. This field is
|
|
|
|
* only used on the receive path when we try to validate
|
|
|
|
* that the cookie has not been tampered with. We put
|
|
|
|
* this here so we pre-allocate this once and can re-use
|
|
|
|
* on every receive.
|
|
|
|
*/
|
2006-11-09 17:29:57 -07:00
|
|
|
__u8 *digest;
|
2006-01-17 12:55:57 -07:00
|
|
|
|
2005-04-28 13:02:04 -06:00
|
|
|
/* sendbuf acct. policy. */
|
|
|
|
__u32 sndbuf_policy;
|
2005-11-11 17:08:24 -07:00
|
|
|
|
|
|
|
/* rcvbuf acct. policy. */
|
|
|
|
__u32 rcvbuf_policy;
|
2007-10-09 02:15:59 -06:00
|
|
|
|
|
|
|
/* SCTP AUTH: array of the HMACs that will be allocated
|
|
|
|
* we need this per association so that we don't serialize
|
|
|
|
*/
|
|
|
|
struct crypto_hash **auth_hmacs;
|
|
|
|
|
|
|
|
/* SCTP-AUTH: hmacs for the endpoint encoded into parameter */
|
|
|
|
struct sctp_hmac_algo_param *auth_hmacs_list;
|
|
|
|
|
|
|
|
/* SCTP-AUTH: chunks to authenticate encoded into parameter */
|
|
|
|
struct sctp_chunks_param *auth_chunk_list;
|
|
|
|
|
|
|
|
/* SCTP-AUTH: endpoint shared keys */
|
|
|
|
struct list_head endpoint_shared_keys;
|
|
|
|
__u16 active_key_id;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Recover the outter endpoint structure. */
|
|
|
|
static inline struct sctp_endpoint *sctp_ep(struct sctp_ep_common *base)
|
|
|
|
{
|
|
|
|
struct sctp_endpoint *ep;
|
|
|
|
|
|
|
|
ep = container_of(base, struct sctp_endpoint, base);
|
|
|
|
return ep;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* These are function signatures for manipulating endpoints. */
|
2005-10-07 00:46:04 -06:00
|
|
|
struct sctp_endpoint *sctp_endpoint_new(struct sock *, gfp_t);
|
2005-04-16 16:20:36 -06:00
|
|
|
void sctp_endpoint_free(struct sctp_endpoint *);
|
|
|
|
void sctp_endpoint_put(struct sctp_endpoint *);
|
|
|
|
void sctp_endpoint_hold(struct sctp_endpoint *);
|
|
|
|
void sctp_endpoint_add_asoc(struct sctp_endpoint *, struct sctp_association *);
|
|
|
|
struct sctp_association *sctp_endpoint_lookup_assoc(
|
|
|
|
const struct sctp_endpoint *ep,
|
|
|
|
const union sctp_addr *paddr,
|
|
|
|
struct sctp_transport **);
|
|
|
|
int sctp_endpoint_is_peeled_off(struct sctp_endpoint *,
|
|
|
|
const union sctp_addr *);
|
|
|
|
struct sctp_endpoint *sctp_endpoint_is_match(struct sctp_endpoint *,
|
2012-08-06 02:40:21 -06:00
|
|
|
struct net *, const union sctp_addr *);
|
2012-08-06 02:41:13 -06:00
|
|
|
int sctp_has_association(struct net *net, const union sctp_addr *laddr,
|
2005-04-16 16:20:36 -06:00
|
|
|
const union sctp_addr *paddr);
|
|
|
|
|
2012-08-07 01:29:08 -06:00
|
|
|
int sctp_verify_init(struct net *net, const struct sctp_association *asoc,
|
|
|
|
sctp_cid_t, sctp_init_chunk_t *peer_init,
|
|
|
|
struct sctp_chunk *chunk, struct sctp_chunk **err_chunk);
|
2011-04-19 15:30:51 -06:00
|
|
|
int sctp_process_init(struct sctp_association *, struct sctp_chunk *chunk,
|
2005-04-16 16:20:36 -06:00
|
|
|
const union sctp_addr *peer,
|
2005-10-07 00:46:04 -06:00
|
|
|
sctp_init_chunk_t *init, gfp_t gfp);
|
2005-04-16 16:20:36 -06:00
|
|
|
__u32 sctp_generate_tag(const struct sctp_endpoint *);
|
|
|
|
__u32 sctp_generate_tsn(const struct sctp_endpoint *);
|
|
|
|
|
2006-11-20 18:25:32 -07:00
|
|
|
struct sctp_inithdr_host {
|
|
|
|
__u32 init_tag;
|
|
|
|
__u32 a_rwnd;
|
|
|
|
__u16 num_outbound_streams;
|
|
|
|
__u16 num_inbound_streams;
|
|
|
|
__u32 initial_tsn;
|
|
|
|
};
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2012-11-30 21:49:42 -07:00
|
|
|
/* SCTP_GET_ASSOC_STATS counters */
|
|
|
|
struct sctp_priv_assoc_stats {
|
|
|
|
/* Maximum observed rto in the association during subsequent
|
|
|
|
* observations. Value is set to 0 if no RTO measurement took place
|
|
|
|
* The transport where the max_rto was observed is returned in
|
|
|
|
* obs_rto_ipaddr
|
|
|
|
*/
|
|
|
|
struct sockaddr_storage obs_rto_ipaddr;
|
|
|
|
__u64 max_obs_rto;
|
|
|
|
/* Total In and Out SACKs received and sent */
|
|
|
|
__u64 isacks;
|
|
|
|
__u64 osacks;
|
|
|
|
/* Total In and Out packets received and sent */
|
|
|
|
__u64 opackets;
|
|
|
|
__u64 ipackets;
|
|
|
|
/* Total retransmitted chunks */
|
|
|
|
__u64 rtxchunks;
|
|
|
|
/* TSN received > next expected */
|
|
|
|
__u64 outofseqtsns;
|
|
|
|
/* Duplicate Chunks received */
|
|
|
|
__u64 idupchunks;
|
|
|
|
/* Gap Ack Blocks received */
|
|
|
|
__u64 gapcnt;
|
|
|
|
/* Unordered data chunks sent and received */
|
|
|
|
__u64 ouodchunks;
|
|
|
|
__u64 iuodchunks;
|
|
|
|
/* Ordered data chunks sent and received */
|
|
|
|
__u64 oodchunks;
|
|
|
|
__u64 iodchunks;
|
|
|
|
/* Control chunks sent and received */
|
|
|
|
__u64 octrlchunks;
|
|
|
|
__u64 ictrlchunks;
|
|
|
|
};
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* RFC2960
|
|
|
|
*
|
|
|
|
* 12. Recommended Transmission Control Block (TCB) Parameters
|
|
|
|
*
|
|
|
|
* This section details a recommended set of parameters that should
|
|
|
|
* be contained within the TCB for an implementation. This section is
|
|
|
|
* for illustrative purposes and should not be deemed as requirements
|
|
|
|
* on an implementation or as an exhaustive list of all parameters
|
|
|
|
* inside an SCTP TCB. Each implementation may need its own additional
|
|
|
|
* parameters for optimization.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/* Here we have information about each individual association. */
|
|
|
|
struct sctp_association {
|
|
|
|
|
|
|
|
/* A base structure common to endpoint and association.
|
|
|
|
* In this context, it represents the associations's view
|
|
|
|
* of the local endpoint of the association.
|
|
|
|
*/
|
|
|
|
struct sctp_ep_common base;
|
|
|
|
|
|
|
|
/* Associations on the same socket. */
|
|
|
|
struct list_head asocs;
|
|
|
|
|
|
|
|
/* association id. */
|
|
|
|
sctp_assoc_t assoc_id;
|
|
|
|
|
|
|
|
/* This is our parent endpoint. */
|
|
|
|
struct sctp_endpoint *ep;
|
|
|
|
|
|
|
|
/* These are those association elements needed in the cookie. */
|
|
|
|
struct sctp_cookie c;
|
|
|
|
|
|
|
|
/* This is all information about our peer. */
|
|
|
|
struct {
|
|
|
|
/* rwnd
|
|
|
|
*
|
|
|
|
* Peer Rwnd : Current calculated value of the peer's rwnd.
|
|
|
|
*/
|
|
|
|
__u32 rwnd;
|
|
|
|
|
|
|
|
/* transport_addr_list
|
|
|
|
*
|
|
|
|
* Peer : A list of SCTP transport addresses that the
|
|
|
|
* Transport : peer is bound to. This information is derived
|
|
|
|
* Address : from the INIT or INIT ACK and is used to
|
|
|
|
* List : associate an inbound packet with a given
|
|
|
|
* : association. Normally this information is
|
|
|
|
* : hashed or keyed for quick lookup and access
|
|
|
|
* : of the TCB.
|
2005-06-20 14:14:57 -06:00
|
|
|
* : The list is also initialized with the list
|
|
|
|
* : of addresses passed with the sctp_connectx()
|
|
|
|
* : call.
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
|
|
|
* It is a list of SCTP_transport's.
|
|
|
|
*/
|
|
|
|
struct list_head transport_addr_list;
|
|
|
|
|
2005-06-20 14:14:57 -06:00
|
|
|
/* transport_count
|
|
|
|
*
|
|
|
|
* Peer : A count of the number of peer addresses
|
|
|
|
* Transport : in the Peer Transport Address List.
|
|
|
|
* Address :
|
|
|
|
* Count :
|
|
|
|
*/
|
|
|
|
__u16 transport_count;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* port
|
|
|
|
* The transport layer port number.
|
|
|
|
*/
|
|
|
|
__u16 port;
|
|
|
|
|
|
|
|
/* primary_path
|
|
|
|
*
|
|
|
|
* Primary : This is the current primary destination
|
|
|
|
* Path : transport address of the peer endpoint. It
|
|
|
|
* : may also specify a source transport address
|
|
|
|
* : on this endpoint.
|
|
|
|
*
|
|
|
|
* All of these paths live on transport_addr_list.
|
|
|
|
*
|
|
|
|
* At the bakeoffs, we discovered that the intent of
|
|
|
|
* primaryPath is that it only changes when the ULP
|
|
|
|
* asks to have it changed. We add the activePath to
|
|
|
|
* designate the connection we are currently using to
|
|
|
|
* transmit new data and most control chunks.
|
|
|
|
*/
|
|
|
|
struct sctp_transport *primary_path;
|
|
|
|
|
|
|
|
/* Cache the primary path address here, when we
|
|
|
|
* need a an address for msg_name.
|
|
|
|
*/
|
|
|
|
union sctp_addr primary_addr;
|
|
|
|
|
|
|
|
/* active_path
|
|
|
|
* The path that we are currently using to
|
|
|
|
* transmit new data and most control chunks.
|
|
|
|
*/
|
|
|
|
struct sctp_transport *active_path;
|
|
|
|
|
|
|
|
/* retran_path
|
|
|
|
*
|
|
|
|
* RFC2960 6.4 Multi-homed SCTP Endpoints
|
|
|
|
* ...
|
|
|
|
* Furthermore, when its peer is multi-homed, an
|
|
|
|
* endpoint SHOULD try to retransmit a chunk to an
|
|
|
|
* active destination transport address that is
|
|
|
|
* different from the last destination address to
|
|
|
|
* which the DATA chunk was sent.
|
|
|
|
*/
|
|
|
|
struct sctp_transport *retran_path;
|
|
|
|
|
|
|
|
/* Pointer to last transport I have sent on. */
|
|
|
|
struct sctp_transport *last_sent_to;
|
|
|
|
|
|
|
|
/* This is the last transport I have received DATA on. */
|
|
|
|
struct sctp_transport *last_data_from;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Mapping An array of bits or bytes indicating which out of
|
|
|
|
* Array order TSN's have been received (relative to the
|
|
|
|
* Last Rcvd TSN). If no gaps exist, i.e. no out of
|
|
|
|
* order packets have been received, this array
|
|
|
|
* will be set to all zero. This structure may be
|
|
|
|
* in the form of a circular buffer or bit array.
|
|
|
|
*
|
|
|
|
* Last Rcvd : This is the last TSN received in
|
|
|
|
* TSN : sequence. This value is set initially by
|
|
|
|
* : taking the peer's Initial TSN, received in
|
|
|
|
* : the INIT or INIT ACK chunk, and subtracting
|
|
|
|
* : one from it.
|
|
|
|
*
|
|
|
|
* Throughout most of the specification this is called the
|
|
|
|
* "Cumulative TSN ACK Point". In this case, we
|
|
|
|
* ignore the advice in 12.2 in favour of the term
|
|
|
|
* used in the bulk of the text. This value is hidden
|
|
|
|
* in tsn_map--we get it by calling sctp_tsnmap_get_ctsn().
|
|
|
|
*/
|
|
|
|
struct sctp_tsnmap tsn_map;
|
|
|
|
|
|
|
|
/* Ack State : This flag indicates if the next received
|
|
|
|
* : packet is to be responded to with a
|
|
|
|
* : SACK. This is initializedto 0. When a packet
|
|
|
|
* : is received it is incremented. If this value
|
|
|
|
* : reaches 2 or more, a SACK is sent and the
|
|
|
|
* : value is reset to 0. Note: This is used only
|
|
|
|
* : when no DATA chunks are received out of
|
|
|
|
* : order. When DATA chunks are out of order,
|
|
|
|
* : SACK's are not delayed (see Section 6).
|
|
|
|
*/
|
|
|
|
__u8 sack_needed; /* Do we need to sack the peer? */
|
2008-05-09 16:13:26 -06:00
|
|
|
__u32 sack_cnt;
|
2012-06-29 21:04:26 -06:00
|
|
|
__u32 sack_generation;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* These are capabilities which our peer advertised. */
|
2009-09-04 00:33:19 -06:00
|
|
|
__u8 ecn_capable:1, /* Can peer do ECN? */
|
|
|
|
ipv4_address:1, /* Peer understands IPv4 addresses? */
|
|
|
|
ipv6_address:1, /* Peer understands IPv6 addresses? */
|
|
|
|
hostname_address:1, /* Peer understands DNS addresses? */
|
|
|
|
asconf_capable:1, /* Does peer support ADDIP? */
|
|
|
|
prsctp_capable:1, /* Can peer do PR-SCTP? */
|
|
|
|
auth_capable:1; /* Is peer doing SCTP-AUTH? */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-12-20 17:07:04 -07:00
|
|
|
__u32 adaptation_ind; /* Adaptation Code point. */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* This mask is used to disable sending the ASCONF chunk
|
|
|
|
* with specified parameter to peer.
|
|
|
|
*/
|
2006-11-20 18:01:42 -07:00
|
|
|
__be16 addip_disabled_mask;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-11-20 18:25:32 -07:00
|
|
|
struct sctp_inithdr_host i;
|
2005-04-16 16:20:36 -06:00
|
|
|
int cookie_len;
|
|
|
|
void *cookie;
|
|
|
|
|
|
|
|
/* ADDIP Section 4.2 Upon reception of an ASCONF Chunk.
|
|
|
|
* C1) ... "Peer-Serial-Number'. This value MUST be initialized to the
|
|
|
|
* Initial TSN Value minus 1
|
|
|
|
*/
|
|
|
|
__u32 addip_serial;
|
2007-10-09 02:15:59 -06:00
|
|
|
|
|
|
|
/* SCTP-AUTH: We need to know pears random number, hmac list
|
|
|
|
* and authenticated chunk list. All that is part of the
|
|
|
|
* cookie and these are just pointers to those locations
|
|
|
|
*/
|
|
|
|
sctp_random_param_t *peer_random;
|
|
|
|
sctp_chunks_param_t *peer_chunks;
|
|
|
|
sctp_hmac_algo_param_t *peer_hmacs;
|
2005-04-16 16:20:36 -06:00
|
|
|
} peer;
|
|
|
|
|
|
|
|
/* State : A state variable indicating what state the
|
|
|
|
* : association is in, i.e. COOKIE-WAIT,
|
|
|
|
* : COOKIE-ECHOED, ESTABLISHED, SHUTDOWN-PENDING,
|
|
|
|
* : SHUTDOWN-SENT, SHUTDOWN-RECEIVED, SHUTDOWN-ACK-SENT.
|
|
|
|
*
|
|
|
|
* Note: No "CLOSED" state is illustrated since if a
|
|
|
|
* association is "CLOSED" its TCB SHOULD be removed.
|
|
|
|
*
|
|
|
|
* In this implementation we DO have a CLOSED
|
|
|
|
* state which is used during initiation and shutdown.
|
|
|
|
*
|
|
|
|
* State takes values from SCTP_STATE_*.
|
|
|
|
*/
|
|
|
|
sctp_state_t state;
|
|
|
|
|
|
|
|
/* The cookie life I award for any cookie. */
|
|
|
|
struct timeval cookie_life;
|
|
|
|
|
|
|
|
/* Overall : The overall association error count.
|
|
|
|
* Error Count : [Clear this any time I get something.]
|
|
|
|
*/
|
|
|
|
int overall_error_count;
|
|
|
|
|
|
|
|
/* These are the association's initial, max, and min RTO values.
|
|
|
|
* These values will be initialized by system defaults, but can
|
|
|
|
* be modified via the SCTP_RTOINFO socket option.
|
|
|
|
*/
|
2006-01-17 12:55:17 -07:00
|
|
|
unsigned long rto_initial;
|
|
|
|
unsigned long rto_max;
|
|
|
|
unsigned long rto_min;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Maximum number of new data packets that can be sent in a burst. */
|
|
|
|
int max_burst;
|
|
|
|
|
|
|
|
/* This is the max_retrans value for the association. This value will
|
|
|
|
* be initialized initialized from system defaults, but can be
|
|
|
|
* modified by the SCTP_ASSOCINFO socket option.
|
|
|
|
*/
|
|
|
|
int max_retrans;
|
|
|
|
|
2012-07-21 01:56:07 -06:00
|
|
|
/* This is the partially failed retrans value for the transport
|
|
|
|
* and will be initialized from the assocs value. This can be
|
|
|
|
* changed using the SCTP_PEER_ADDR_THLDS socket option
|
|
|
|
*/
|
|
|
|
int pf_retrans;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Maximum number of times the endpoint will retransmit INIT */
|
|
|
|
__u16 max_init_attempts;
|
|
|
|
|
|
|
|
/* How many times have we resent an INIT? */
|
|
|
|
__u16 init_retries;
|
|
|
|
|
|
|
|
/* The largest timeout or RTO value to use in attempting an INIT */
|
2006-01-17 12:55:17 -07:00
|
|
|
unsigned long max_init_timeo;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-12-22 12:36:46 -07:00
|
|
|
/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
|
|
|
|
* the destination address every heartbeat interval. This value
|
|
|
|
* will be inherited by all new transports.
|
|
|
|
*/
|
2006-01-17 12:55:17 -07:00
|
|
|
unsigned long hbinterval;
|
2005-12-22 12:36:46 -07:00
|
|
|
|
|
|
|
/* This is the max_retrans value for new transports in the
|
|
|
|
* association.
|
|
|
|
*/
|
|
|
|
__u16 pathmaxrxt;
|
|
|
|
|
2007-06-07 12:21:05 -06:00
|
|
|
/* Flag that path mtu update is pending */
|
|
|
|
__u8 pmtu_pending;
|
|
|
|
|
2005-12-22 12:36:46 -07:00
|
|
|
/* Association : The smallest PMTU discovered for all of the
|
|
|
|
* PMTU : peer's transport addresses.
|
|
|
|
*/
|
|
|
|
__u32 pathmtu;
|
|
|
|
|
2007-12-20 14:56:32 -07:00
|
|
|
/* Flags controlling Heartbeat, SACK delay, and Path MTU Discovery. */
|
2005-12-22 12:36:46 -07:00
|
|
|
__u32 param_flags;
|
|
|
|
|
2006-01-17 12:55:17 -07:00
|
|
|
/* SACK delay timeout */
|
|
|
|
unsigned long sackdelay;
|
2008-05-09 16:13:26 -06:00
|
|
|
__u32 sackfreq;
|
2006-01-17 12:55:17 -07:00
|
|
|
|
|
|
|
|
|
|
|
unsigned long timeouts[SCTP_NUM_TIMEOUT_TYPES];
|
2005-04-16 16:20:36 -06:00
|
|
|
struct timer_list timers[SCTP_NUM_TIMEOUT_TYPES];
|
|
|
|
|
|
|
|
/* Transport to which SHUTDOWN chunk was last sent. */
|
|
|
|
struct sctp_transport *shutdown_last_sent_to;
|
|
|
|
|
2008-02-29 12:40:56 -07:00
|
|
|
/* How many times have we resent a SHUTDOWN */
|
|
|
|
int shutdown_retries;
|
|
|
|
|
2005-06-20 14:14:57 -06:00
|
|
|
/* Transport to which INIT chunk was last sent. */
|
|
|
|
struct sctp_transport *init_last_sent_to;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Next TSN : The next TSN number to be assigned to a new
|
|
|
|
* : DATA chunk. This is sent in the INIT or INIT
|
|
|
|
* : ACK chunk to the peer and incremented each
|
|
|
|
* : time a DATA chunk is assigned a TSN
|
|
|
|
* : (normally just prior to transmit or during
|
|
|
|
* : fragmentation).
|
|
|
|
*/
|
|
|
|
__u32 next_tsn;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Last Rcvd : This is the last TSN received in sequence. This value
|
|
|
|
* TSN : is set initially by taking the peer's Initial TSN,
|
|
|
|
* : received in the INIT or INIT ACK chunk, and
|
|
|
|
* : subtracting one from it.
|
|
|
|
*
|
|
|
|
* Most of RFC 2960 refers to this as the Cumulative TSN Ack Point.
|
|
|
|
*/
|
|
|
|
|
|
|
|
__u32 ctsn_ack_point;
|
|
|
|
|
|
|
|
/* PR-SCTP Advanced.Peer.Ack.Point */
|
|
|
|
__u32 adv_peer_ack_point;
|
|
|
|
|
|
|
|
/* Highest TSN that is acknowledged by incoming SACKs. */
|
|
|
|
__u32 highest_sacked;
|
|
|
|
|
2010-04-30 20:41:10 -06:00
|
|
|
/* TSN marking the fast recovery exit point */
|
|
|
|
__u32 fast_recovery_exit;
|
|
|
|
|
|
|
|
/* Flag to track the current fast recovery state */
|
|
|
|
__u8 fast_recovery;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* The number of unacknowledged data chunks. Reported through
|
|
|
|
* the SCTP_STATUS sockopt.
|
|
|
|
*/
|
|
|
|
__u16 unack_data;
|
|
|
|
|
2008-02-29 12:40:56 -07:00
|
|
|
/* The total number of data chunks that we've had to retransmit
|
|
|
|
* as the result of a T3 timer expiration
|
|
|
|
*/
|
|
|
|
__u32 rtx_data_chunks;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* This is the association's receive buffer space. This value is used
|
|
|
|
* to set a_rwnd field in an INIT or a SACK chunk.
|
|
|
|
*/
|
|
|
|
__u32 rwnd;
|
|
|
|
|
|
|
|
/* This is the last advertised value of rwnd over a SACK chunk. */
|
|
|
|
__u32 a_rwnd;
|
|
|
|
|
|
|
|
/* Number of bytes by which the rwnd has slopped. The rwnd is allowed
|
|
|
|
* to slop over a maximum of the association's frag_point.
|
|
|
|
*/
|
|
|
|
__u32 rwnd_over;
|
|
|
|
|
2009-09-04 16:20:59 -06:00
|
|
|
/* Keeps treack of rwnd pressure. This happens when we have
|
|
|
|
* a window, but not recevie buffer (i.e small packets). This one
|
|
|
|
* is releases slowly (1 PMTU at a time ).
|
|
|
|
*/
|
|
|
|
__u32 rwnd_press;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* This is the sndbuf size in use for the association.
|
|
|
|
* This corresponds to the sndbuf size for the association,
|
|
|
|
* as specified in the sk->sndbuf.
|
|
|
|
*/
|
|
|
|
int sndbuf_used;
|
|
|
|
|
2005-11-11 17:08:24 -07:00
|
|
|
/* This is the amount of memory that this association has allocated
|
|
|
|
* in the receive path at any given time.
|
|
|
|
*/
|
|
|
|
atomic_t rmem_alloc;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* This is the wait queue head for send requests waiting on
|
|
|
|
* the association sndbuf space.
|
|
|
|
*/
|
|
|
|
wait_queue_head_t wait;
|
|
|
|
|
|
|
|
/* The message size at which SCTP fragmentation will occur. */
|
|
|
|
__u32 frag_point;
|
2009-09-04 16:21:00 -06:00
|
|
|
__u32 user_frag;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-06-20 14:14:57 -06:00
|
|
|
/* Counter used to count INIT errors. */
|
|
|
|
int init_err_counter;
|
|
|
|
|
|
|
|
/* Count the number of INIT cycles (for doubling timeout). */
|
|
|
|
int init_cycle;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Default send parameters. */
|
|
|
|
__u16 default_stream;
|
|
|
|
__u16 default_flags;
|
|
|
|
__u32 default_ppid;
|
|
|
|
__u32 default_context;
|
|
|
|
__u32 default_timetolive;
|
|
|
|
|
2006-12-13 17:34:22 -07:00
|
|
|
/* Default receive parameters */
|
|
|
|
__u32 default_rcv_context;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* This tracks outbound ssn for a given stream. */
|
|
|
|
struct sctp_ssnmap *ssnmap;
|
|
|
|
|
|
|
|
/* All outbound chunks go through this structure. */
|
|
|
|
struct sctp_outq outqueue;
|
|
|
|
|
|
|
|
/* A smart pipe that will handle reordering and fragmentation,
|
|
|
|
* as well as handle passing events up to the ULP.
|
|
|
|
*/
|
|
|
|
struct sctp_ulpq ulpq;
|
|
|
|
|
|
|
|
/* Last TSN that caused an ECNE Chunk to be sent. */
|
|
|
|
__u32 last_ecne_tsn;
|
|
|
|
|
|
|
|
/* Last TSN that caused a CWR Chunk to be sent. */
|
|
|
|
__u32 last_cwr_tsn;
|
|
|
|
|
|
|
|
/* How many duplicated TSNs have we seen? */
|
|
|
|
int numduptsns;
|
|
|
|
|
2006-01-17 12:55:17 -07:00
|
|
|
/* Number of seconds of idle time before an association is closed.
|
|
|
|
* In the association context, this is really used as a boolean
|
|
|
|
* since the real timeout is stored in the timeouts array
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
__u32 autoclose;
|
|
|
|
|
|
|
|
/* These are to support
|
|
|
|
* "SCTP Extensions for Dynamic Reconfiguration of IP Addresses
|
|
|
|
* and Enforcement of Flow and Message Limits"
|
|
|
|
* <draft-ietf-tsvwg-addip-sctp-02.txt>
|
|
|
|
* or "ADDIP" for short.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
|
|
|
|
*
|
|
|
|
* R1) One and only one ASCONF Chunk MAY be in transit and
|
|
|
|
* unacknowledged at any one time. If a sender, after sending
|
|
|
|
* an ASCONF chunk, decides it needs to transfer another
|
|
|
|
* ASCONF Chunk, it MUST wait until the ASCONF-ACK Chunk
|
|
|
|
* returns from the previous ASCONF Chunk before sending a
|
|
|
|
* subsequent ASCONF. Note this restriction binds each side,
|
|
|
|
* so at any time two ASCONF may be in-transit on any given
|
|
|
|
* association (one sent from each endpoint).
|
|
|
|
*
|
|
|
|
* [This is our one-and-only-one ASCONF in flight. If we do
|
|
|
|
* not have an ASCONF in flight, this is NULL.]
|
|
|
|
*/
|
|
|
|
struct sctp_chunk *addip_last_asconf;
|
|
|
|
|
2007-12-20 15:11:47 -07:00
|
|
|
/* ADDIP Section 5.2 Upon reception of an ASCONF Chunk.
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
2007-12-20 15:11:47 -07:00
|
|
|
* This is needed to implement itmes E1 - E4 of the updated
|
|
|
|
* spec. Here is the justification:
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
2007-12-20 15:11:47 -07:00
|
|
|
* Since the peer may bundle multiple ASCONF chunks toward us,
|
|
|
|
* we now need the ability to cache multiple ACKs. The section
|
|
|
|
* describes in detail how they are cached and cleaned up.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
2007-12-20 15:11:47 -07:00
|
|
|
struct list_head asconf_ack_list;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* These ASCONF chunks are waiting to be sent.
|
|
|
|
*
|
|
|
|
* These chunaks can't be pushed to outqueue until receiving
|
|
|
|
* ASCONF_ACK for the previous ASCONF indicated by
|
|
|
|
* addip_last_asconf, so as to guarantee that only one ASCONF
|
|
|
|
* is in flight at any time.
|
|
|
|
*
|
|
|
|
* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
|
|
|
|
*
|
|
|
|
* In defining the ASCONF Chunk transfer procedures, it is
|
|
|
|
* essential that these transfers MUST NOT cause congestion
|
|
|
|
* within the network. To achieve this, we place these
|
|
|
|
* restrictions on the transfer of ASCONF Chunks:
|
|
|
|
*
|
|
|
|
* R1) One and only one ASCONF Chunk MAY be in transit and
|
|
|
|
* unacknowledged at any one time. If a sender, after sending
|
|
|
|
* an ASCONF chunk, decides it needs to transfer another
|
|
|
|
* ASCONF Chunk, it MUST wait until the ASCONF-ACK Chunk
|
|
|
|
* returns from the previous ASCONF Chunk before sending a
|
|
|
|
* subsequent ASCONF. Note this restriction binds each side,
|
|
|
|
* so at any time two ASCONF may be in-transit on any given
|
|
|
|
* association (one sent from each endpoint).
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* [I really think this is EXACTLY the sort of intelligence
|
|
|
|
* which already resides in sctp_outq. Please move this
|
|
|
|
* queue and its supporting logic down there. --piggy]
|
|
|
|
*/
|
2005-07-08 22:47:49 -06:00
|
|
|
struct list_head addip_chunk_list;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* ADDIP Section 4.1 ASCONF Chunk Procedures
|
|
|
|
*
|
|
|
|
* A2) A serial number should be assigned to the Chunk. The
|
|
|
|
* serial number SHOULD be a monotonically increasing
|
|
|
|
* number. The serial number SHOULD be initialized at
|
|
|
|
* the start of the association to the same value as the
|
|
|
|
* Initial TSN and every time a new ASCONF chunk is created
|
|
|
|
* it is incremented by one after assigning the serial number
|
|
|
|
* to the newly created chunk.
|
|
|
|
*
|
|
|
|
* ADDIP
|
|
|
|
* 3.1.1 Address/Stream Configuration Change Chunk (ASCONF)
|
|
|
|
*
|
|
|
|
* Serial Number : 32 bits (unsigned integer)
|
|
|
|
*
|
|
|
|
* This value represents a Serial Number for the ASCONF
|
|
|
|
* Chunk. The valid range of Serial Number is from 0 to
|
|
|
|
* 4294967295 (2^32 - 1). Serial Numbers wrap back to 0
|
|
|
|
* after reaching 4294967295.
|
|
|
|
*/
|
|
|
|
__u32 addip_serial;
|
2011-04-26 05:19:36 -06:00
|
|
|
union sctp_addr *asconf_addr_del_pending;
|
|
|
|
int src_out_of_asoc_ok;
|
2011-06-16 02:14:34 -06:00
|
|
|
struct sctp_transport *new_transport;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-10-09 02:15:59 -06:00
|
|
|
/* SCTP AUTH: list of the endpoint shared keys. These
|
|
|
|
* keys are provided out of band by the user applicaton
|
|
|
|
* and can't change during the lifetime of the association
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*/
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struct list_head endpoint_shared_keys;
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/* SCTP AUTH:
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* The current generated assocaition shared key (secret)
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*/
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struct sctp_auth_bytes *asoc_shared_key;
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/* SCTP AUTH: hmac id of the first peer requested algorithm
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* that we support.
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*/
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__u16 default_hmac_id;
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__u16 active_key_id;
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2009-09-04 00:33:19 -06:00
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__u8 need_ecne:1, /* Need to send an ECNE Chunk? */
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temp:1; /* Is it a temporary association? */
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2012-11-30 21:49:42 -07:00
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struct sctp_priv_assoc_stats stats;
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2005-04-16 16:20:36 -06:00
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};
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/* An eyecatcher for determining if we are really looking at an
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* association data structure.
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*/
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enum {
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SCTP_ASSOC_EYECATCHER = 0xa550c123,
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};
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/* Recover the outter association structure. */
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static inline struct sctp_association *sctp_assoc(struct sctp_ep_common *base)
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{
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struct sctp_association *asoc;
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asoc = container_of(base, struct sctp_association, base);
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return asoc;
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}
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/* These are function signatures for manipulating associations. */
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struct sctp_association *
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sctp_association_new(const struct sctp_endpoint *, const struct sock *,
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2005-10-07 00:46:04 -06:00
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sctp_scope_t scope, gfp_t gfp);
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2005-04-16 16:20:36 -06:00
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void sctp_association_free(struct sctp_association *);
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void sctp_association_put(struct sctp_association *);
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void sctp_association_hold(struct sctp_association *);
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2009-05-12 07:52:51 -06:00
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struct sctp_transport *sctp_assoc_choose_alter_transport(
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struct sctp_association *, struct sctp_transport *);
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2005-04-16 16:20:36 -06:00
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void sctp_assoc_update_retran_path(struct sctp_association *);
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struct sctp_transport *sctp_assoc_lookup_paddr(const struct sctp_association *,
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const union sctp_addr *);
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int sctp_assoc_lookup_laddr(struct sctp_association *asoc,
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const union sctp_addr *laddr);
|
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struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *,
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|
|
const union sctp_addr *address,
|
2005-10-07 00:46:04 -06:00
|
|
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const gfp_t gfp,
|
2005-06-20 14:14:57 -06:00
|
|
|
const int peer_state);
|
2005-04-16 16:20:36 -06:00
|
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void sctp_assoc_del_peer(struct sctp_association *asoc,
|
|
|
|
const union sctp_addr *addr);
|
2005-06-20 14:14:57 -06:00
|
|
|
void sctp_assoc_rm_peer(struct sctp_association *asoc,
|
|
|
|
struct sctp_transport *peer);
|
2005-04-16 16:20:36 -06:00
|
|
|
void sctp_assoc_control_transport(struct sctp_association *,
|
|
|
|
struct sctp_transport *,
|
|
|
|
sctp_transport_cmd_t, sctp_sn_error_t);
|
|
|
|
struct sctp_transport *sctp_assoc_lookup_tsn(struct sctp_association *, __u32);
|
|
|
|
struct sctp_transport *sctp_assoc_is_match(struct sctp_association *,
|
2012-08-06 02:41:13 -06:00
|
|
|
struct net *,
|
2005-04-16 16:20:36 -06:00
|
|
|
const union sctp_addr *,
|
|
|
|
const union sctp_addr *);
|
|
|
|
void sctp_assoc_migrate(struct sctp_association *, struct sock *);
|
|
|
|
void sctp_assoc_update(struct sctp_association *old,
|
|
|
|
struct sctp_association *new);
|
|
|
|
|
|
|
|
__u32 sctp_association_get_next_tsn(struct sctp_association *);
|
|
|
|
|
2012-07-16 04:57:14 -06:00
|
|
|
void sctp_assoc_sync_pmtu(struct sock *, struct sctp_association *);
|
2012-04-14 23:58:06 -06:00
|
|
|
void sctp_assoc_rwnd_increase(struct sctp_association *, unsigned int);
|
|
|
|
void sctp_assoc_rwnd_decrease(struct sctp_association *, unsigned int);
|
2005-04-16 16:20:36 -06:00
|
|
|
void sctp_assoc_set_primary(struct sctp_association *,
|
|
|
|
struct sctp_transport *);
|
2007-12-20 15:08:56 -07:00
|
|
|
void sctp_assoc_del_nonprimary_peers(struct sctp_association *,
|
|
|
|
struct sctp_transport *);
|
2005-07-11 21:57:47 -06:00
|
|
|
int sctp_assoc_set_bind_addr_from_ep(struct sctp_association *,
|
2009-11-10 01:57:34 -07:00
|
|
|
sctp_scope_t, gfp_t);
|
2005-04-16 16:20:36 -06:00
|
|
|
int sctp_assoc_set_bind_addr_from_cookie(struct sctp_association *,
|
2005-07-11 21:57:47 -06:00
|
|
|
struct sctp_cookie*,
|
2005-10-07 00:46:04 -06:00
|
|
|
gfp_t gfp);
|
2007-05-04 14:55:27 -06:00
|
|
|
int sctp_assoc_set_id(struct sctp_association *, gfp_t);
|
2007-12-20 15:11:47 -07:00
|
|
|
void sctp_assoc_clean_asconf_ack_cache(const struct sctp_association *asoc);
|
|
|
|
struct sctp_chunk *sctp_assoc_lookup_asconf_ack(
|
|
|
|
const struct sctp_association *asoc,
|
|
|
|
__be32 serial);
|
2011-05-29 17:23:36 -06:00
|
|
|
void sctp_asconf_queue_teardown(struct sctp_association *asoc);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
int sctp_cmp_addr_exact(const union sctp_addr *ss1,
|
|
|
|
const union sctp_addr *ss2);
|
|
|
|
struct sctp_chunk *sctp_get_ecne_prepend(struct sctp_association *asoc);
|
|
|
|
|
|
|
|
/* A convenience structure to parse out SCTP specific CMSGs. */
|
|
|
|
typedef struct sctp_cmsgs {
|
|
|
|
struct sctp_initmsg *init;
|
|
|
|
struct sctp_sndrcvinfo *info;
|
|
|
|
} sctp_cmsgs_t;
|
|
|
|
|
|
|
|
/* Structure for tracking memory objects */
|
|
|
|
typedef struct {
|
|
|
|
char *label;
|
|
|
|
atomic_t *counter;
|
|
|
|
} sctp_dbg_objcnt_entry_t;
|
|
|
|
|
|
|
|
#endif /* __sctp_structs_h__ */
|