Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 432 insertions, 0 deletions

diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
new file mode 100644
index 000000000..f37c7a558
--- /dev/null
+++ b/include/net/sctp/sm.h
@@ -0,0 +1,432 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* SCTP kernel implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ *
+ * This file is part of the SCTP kernel implementation
+ *
+ * These are definitions needed by the state machine.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email addresses:
+ *    lksctp developers <linux-sctp@vger.kernel.org>
+ *
+ * Written or modified by:
+ *    La Monte H.P. Yarroll <piggy@acm.org>
+ *    Karl Knutson <karl@athena.chicago.il.us>
+ *    Xingang Guo <xingang.guo@intel.com>
+ *    Jon Grimm <jgrimm@us.ibm.com>
+ *    Dajiang Zhang <dajiang.zhang@nokia.com>
+ *    Sridhar Samudrala <sri@us.ibm.com>
+ *    Daisy Chang <daisyc@us.ibm.com>
+ *    Ardelle Fan <ardelle.fan@intel.com>
+ *    Kevin Gao <kevin.gao@intel.com>
+ */
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <net/sctp/command.h>
+#include <net/sctp/sctp.h>
+
+#ifndef __sctp_sm_h__
+#define __sctp_sm_h__
+
+/*
+ * Possible values for the disposition are:
+ */
+enum sctp_disposition {
+	SCTP_DISPOSITION_DISCARD,	 /* No further processing.  */
+	SCTP_DISPOSITION_CONSUME,	 /* Process return values normally.  */
+	SCTP_DISPOSITION_NOMEM,		 /* We ran out of memory--recover.  */
+	SCTP_DISPOSITION_DELETE_TCB,	 /* Close the association.  */
+	SCTP_DISPOSITION_ABORT,		 /* Close the association NOW.  */
+	SCTP_DISPOSITION_VIOLATION,	 /* The peer is misbehaving.  */
+	SCTP_DISPOSITION_NOT_IMPL,	 /* This entry is not implemented.  */
+	SCTP_DISPOSITION_ERROR,		 /* This is plain old user error.  */
+	SCTP_DISPOSITION_BUG,		 /* This is a bug.  */
+};
+
+typedef enum sctp_disposition (sctp_state_fn_t) (
+					struct net *net,
+					const struct sctp_endpoint *ep,
+					const struct sctp_association *asoc,
+					const union sctp_subtype type,
+					void *arg,
+					struct sctp_cmd_seq *commands);
+typedef void (sctp_timer_event_t) (struct timer_list *);
+struct sctp_sm_table_entry {
+	sctp_state_fn_t *fn;
+	const char *name;
+};
+
+/* A naming convention of "sctp_sf_xxx" applies to all the state functions
+ * currently in use.
+ */
+
+/* Prototypes for generic state functions. */
+sctp_state_fn_t sctp_sf_not_impl;
+sctp_state_fn_t sctp_sf_bug;
+
+/* Prototypes for gener timer state functions. */
+sctp_state_fn_t sctp_sf_timer_ignore;
+
+/* Prototypes for chunk state functions. */
+sctp_state_fn_t sctp_sf_do_9_1_abort;
+sctp_state_fn_t sctp_sf_cookie_wait_abort;
+sctp_state_fn_t sctp_sf_cookie_echoed_abort;
+sctp_state_fn_t sctp_sf_shutdown_pending_abort;
+sctp_state_fn_t sctp_sf_shutdown_sent_abort;
+sctp_state_fn_t sctp_sf_shutdown_ack_sent_abort;
+sctp_state_fn_t sctp_sf_do_5_1B_init;
+sctp_state_fn_t sctp_sf_do_5_1C_ack;
+sctp_state_fn_t sctp_sf_do_5_1D_ce;
+sctp_state_fn_t sctp_sf_do_5_1E_ca;
+sctp_state_fn_t sctp_sf_do_4_C;
+sctp_state_fn_t sctp_sf_eat_data_6_2;
+sctp_state_fn_t sctp_sf_eat_data_fast_4_4;
+sctp_state_fn_t sctp_sf_eat_sack_6_2;
+sctp_state_fn_t sctp_sf_operr_notify;
+sctp_state_fn_t sctp_sf_t1_init_timer_expire;
+sctp_state_fn_t sctp_sf_t1_cookie_timer_expire;
+sctp_state_fn_t sctp_sf_t2_timer_expire;
+sctp_state_fn_t sctp_sf_t4_timer_expire;
+sctp_state_fn_t sctp_sf_t5_timer_expire;
+sctp_state_fn_t sctp_sf_sendbeat_8_3;
+sctp_state_fn_t sctp_sf_beat_8_3;
+sctp_state_fn_t sctp_sf_backbeat_8_3;
+sctp_state_fn_t sctp_sf_do_9_2_final;
+sctp_state_fn_t sctp_sf_do_9_2_shutdown;
+sctp_state_fn_t sctp_sf_do_9_2_shut_ctsn;
+sctp_state_fn_t sctp_sf_do_ecn_cwr;
+sctp_state_fn_t sctp_sf_do_ecne;
+sctp_state_fn_t sctp_sf_ootb;
+sctp_state_fn_t sctp_sf_pdiscard;
+sctp_state_fn_t sctp_sf_violation;
+sctp_state_fn_t sctp_sf_discard_chunk;
+sctp_state_fn_t sctp_sf_do_5_2_1_siminit;
+sctp_state_fn_t sctp_sf_do_5_2_2_dupinit;
+sctp_state_fn_t sctp_sf_do_5_2_3_initack;
+sctp_state_fn_t sctp_sf_do_5_2_4_dupcook;
+sctp_state_fn_t sctp_sf_unk_chunk;
+sctp_state_fn_t sctp_sf_do_8_5_1_E_sa;
+sctp_state_fn_t sctp_sf_cookie_echoed_err;
+sctp_state_fn_t sctp_sf_do_asconf;
+sctp_state_fn_t sctp_sf_do_asconf_ack;
+sctp_state_fn_t sctp_sf_do_reconf;
+sctp_state_fn_t sctp_sf_do_9_2_reshutack;
+sctp_state_fn_t sctp_sf_eat_fwd_tsn;
+sctp_state_fn_t sctp_sf_eat_fwd_tsn_fast;
+sctp_state_fn_t sctp_sf_eat_auth;
+
+/* Prototypes for primitive event state functions.  */
+sctp_state_fn_t sctp_sf_do_prm_asoc;
+sctp_state_fn_t sctp_sf_do_prm_send;
+sctp_state_fn_t sctp_sf_do_9_2_prm_shutdown;
+sctp_state_fn_t sctp_sf_cookie_wait_prm_shutdown;
+sctp_state_fn_t sctp_sf_cookie_echoed_prm_shutdown;
+sctp_state_fn_t sctp_sf_do_9_1_prm_abort;
+sctp_state_fn_t sctp_sf_cookie_wait_prm_abort;
+sctp_state_fn_t sctp_sf_cookie_echoed_prm_abort;
+sctp_state_fn_t sctp_sf_shutdown_pending_prm_abort;
+sctp_state_fn_t sctp_sf_shutdown_sent_prm_abort;
+sctp_state_fn_t sctp_sf_shutdown_ack_sent_prm_abort;
+sctp_state_fn_t sctp_sf_error_closed;
+sctp_state_fn_t sctp_sf_error_shutdown;
+sctp_state_fn_t sctp_sf_ignore_primitive;
+sctp_state_fn_t sctp_sf_do_prm_requestheartbeat;
+sctp_state_fn_t sctp_sf_do_prm_asconf;
+sctp_state_fn_t sctp_sf_do_prm_reconf;
+
+/* Prototypes for other event state functions.  */
+sctp_state_fn_t sctp_sf_do_no_pending_tsn;
+sctp_state_fn_t sctp_sf_do_9_2_start_shutdown;
+sctp_state_fn_t sctp_sf_do_9_2_shutdown_ack;
+sctp_state_fn_t sctp_sf_ignore_other;
+sctp_state_fn_t sctp_sf_cookie_wait_icmp_abort;
+
+/* Prototypes for timeout event state functions.  */
+sctp_state_fn_t sctp_sf_do_6_3_3_rtx;
+sctp_state_fn_t sctp_sf_send_reconf;
+sctp_state_fn_t sctp_sf_send_probe;
+sctp_state_fn_t sctp_sf_do_6_2_sack;
+sctp_state_fn_t sctp_sf_autoclose_timer_expire;
+
+/* Prototypes for utility support functions.  */
+__u8 sctp_get_chunk_type(struct sctp_chunk *chunk);
+const struct sctp_sm_table_entry *sctp_sm_lookup_event(
+					struct net *net,
+					enum sctp_event_type event_type,
+					enum sctp_state state,
+					union sctp_subtype event_subtype);
+int sctp_chunk_iif(const struct sctp_chunk *);
+struct sctp_association *sctp_make_temp_asoc(const struct sctp_endpoint *,
+					     struct sctp_chunk *,
+					     gfp_t gfp);
+__u32 sctp_generate_verification_tag(void);
+void sctp_populate_tie_tags(__u8 *cookie, __u32 curTag, __u32 hisTag);
+
+/* Prototypes for chunk-building functions.  */
+struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
+				  const struct sctp_bind_addr *bp,
+				  gfp_t gfp, int vparam_len);
+struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
+				      const struct sctp_chunk *chunk,
+				      const gfp_t gfp, const int unkparam_len);
+struct sctp_chunk *sctp_make_cookie_echo(const struct sctp_association *asoc,
+					 const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_cookie_ack(const struct sctp_association *asoc,
+					const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_cwr(const struct sctp_association *asoc,
+				 const __u32 lowest_tsn,
+				 const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_idata(const struct sctp_association *asoc,
+				   __u8 flags, int paylen, gfp_t gfp);
+struct sctp_chunk *sctp_make_ifwdtsn(const struct sctp_association *asoc,
+				     __u32 new_cum_tsn, size_t nstreams,
+				     struct sctp_ifwdtsn_skip *skiplist);
+struct sctp_chunk *sctp_make_datafrag_empty(const struct sctp_association *asoc,
+					    const struct sctp_sndrcvinfo *sinfo,
+					    int len, __u8 flags, gfp_t gfp);
+struct sctp_chunk *sctp_make_ecne(const struct sctp_association *asoc,
+				  const __u32 lowest_tsn);
+struct sctp_chunk *sctp_make_sack(struct sctp_association *asoc);
+struct sctp_chunk *sctp_make_shutdown(const struct sctp_association *asoc,
+				      const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_shutdown_ack(const struct sctp_association *asoc,
+					  const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_shutdown_complete(
+					const struct sctp_association *asoc,
+					const struct sctp_chunk *chunk);
+int sctp_init_cause(struct sctp_chunk *chunk, __be16 cause, size_t paylen);
+struct sctp_chunk *sctp_make_abort(const struct sctp_association *asoc,
+				   const struct sctp_chunk *chunk,
+				   const size_t hint);
+struct sctp_chunk *sctp_make_abort_no_data(const struct sctp_association *asoc,
+					   const struct sctp_chunk *chunk,
+					   __u32 tsn);
+struct sctp_chunk *sctp_make_abort_user(const struct sctp_association *asoc,
+					struct msghdr *msg, size_t msg_len);
+struct sctp_chunk *sctp_make_abort_violation(
+					const struct sctp_association *asoc,
+					const struct sctp_chunk *chunk,
+					const __u8 *payload,
+					const size_t paylen);
+struct sctp_chunk *sctp_make_violation_paramlen(
+					const struct sctp_association *asoc,
+					const struct sctp_chunk *chunk,
+					struct sctp_paramhdr *param);
+struct sctp_chunk *sctp_make_violation_max_retrans(
+					const struct sctp_association *asoc,
+					const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_new_encap_port(
+					const struct sctp_association *asoc,
+					const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_heartbeat(const struct sctp_association *asoc,
+				       const struct sctp_transport *transport,
+				       __u32 probe_size);
+struct sctp_chunk *sctp_make_heartbeat_ack(const struct sctp_association *asoc,
+					   const struct sctp_chunk *chunk,
+					   const void *payload,
+					   const size_t paylen);
+struct sctp_chunk *sctp_make_pad(const struct sctp_association *asoc, int len);
+struct sctp_chunk *sctp_make_op_error(const struct sctp_association *asoc,
+				      const struct sctp_chunk *chunk,
+				      __be16 cause_code, const void *payload,
+				      size_t paylen, size_t reserve_tail);
+
+struct sctp_chunk *sctp_make_asconf_update_ip(struct sctp_association *asoc,
+					      union sctp_addr *laddr,
+					      struct sockaddr *addrs,
+					      int addrcnt, __be16 flags);
+struct sctp_chunk *sctp_make_asconf_set_prim(struct sctp_association *asoc,
+					     union sctp_addr *addr);
+bool sctp_verify_asconf(const struct sctp_association *asoc,
+			struct sctp_chunk *chunk, bool addr_param_needed,
+			struct sctp_paramhdr **errp);
+struct sctp_chunk *sctp_process_asconf(struct sctp_association *asoc,
+				       struct sctp_chunk *asconf);
+int sctp_process_asconf_ack(struct sctp_association *asoc,
+			    struct sctp_chunk *asconf_ack);
+struct sctp_chunk *sctp_make_fwdtsn(const struct sctp_association *asoc,
+				    __u32 new_cum_tsn, size_t nstreams,
+				    struct sctp_fwdtsn_skip *skiplist);
+struct sctp_chunk *sctp_make_auth(const struct sctp_association *asoc,
+				  __u16 key_id);
+struct sctp_chunk *sctp_make_strreset_req(const struct sctp_association *asoc,
+					  __u16 stream_num, __be16 *stream_list,
+					  bool out, bool in);
+struct sctp_chunk *sctp_make_strreset_tsnreq(
+					const struct sctp_association *asoc);
+struct sctp_chunk *sctp_make_strreset_addstrm(
+					const struct sctp_association *asoc,
+					__u16 out, __u16 in);
+struct sctp_chunk *sctp_make_strreset_resp(const struct sctp_association *asoc,
+					   __u32 result, __u32 sn);
+struct sctp_chunk *sctp_make_strreset_tsnresp(struct sctp_association *asoc,
+					      __u32 result, __u32 sn,
+					      __u32 sender_tsn,
+					      __u32 receiver_tsn);
+bool sctp_verify_reconf(const struct sctp_association *asoc,
+			struct sctp_chunk *chunk,
+			struct sctp_paramhdr **errp);
+void sctp_chunk_assign_tsn(struct sctp_chunk *chunk);
+void sctp_chunk_assign_ssn(struct sctp_chunk *chunk);
+
+/* Prototypes for stream-processing functions.  */
+struct sctp_chunk *sctp_process_strreset_outreq(
+				struct sctp_association *asoc,
+				union sctp_params param,
+				struct sctp_ulpevent **evp);
+struct sctp_chunk *sctp_process_strreset_inreq(
+				struct sctp_association *asoc,
+				union sctp_params param,
+				struct sctp_ulpevent **evp);
+struct sctp_chunk *sctp_process_strreset_tsnreq(
+				struct sctp_association *asoc,
+				union sctp_params param,
+				struct sctp_ulpevent **evp);
+struct sctp_chunk *sctp_process_strreset_addstrm_out(
+				struct sctp_association *asoc,
+				union sctp_params param,
+				struct sctp_ulpevent **evp);
+struct sctp_chunk *sctp_process_strreset_addstrm_in(
+				struct sctp_association *asoc,
+				union sctp_params param,
+				struct sctp_ulpevent **evp);
+struct sctp_chunk *sctp_process_strreset_resp(
+				struct sctp_association *asoc,
+				union sctp_params param,
+				struct sctp_ulpevent **evp);
+
+/* Prototypes for statetable processing. */
+
+int sctp_do_sm(struct net *net, enum sctp_event_type event_type,
+	       union sctp_subtype subtype, enum sctp_state state,
+	       struct sctp_endpoint *ep, struct sctp_association *asoc,
+	       void *event_arg, gfp_t gfp);
+
+/* 2nd level prototypes */
+void sctp_generate_t3_rtx_event(struct timer_list *t);
+void sctp_generate_heartbeat_event(struct timer_list *t);
+void sctp_generate_reconf_event(struct timer_list *t);
+void sctp_generate_probe_event(struct timer_list *t);
+void sctp_generate_proto_unreach_event(struct timer_list *t);
+
+void sctp_ootb_pkt_free(struct sctp_packet *packet);
+
+struct sctp_association *sctp_unpack_cookie(
+					const struct sctp_endpoint *ep,
+					const struct sctp_association *asoc,
+					struct sctp_chunk *chunk,
+					gfp_t gfp, int *err,
+					struct sctp_chunk **err_chk_p);
+
+/* 3rd level prototypes */
+__u32 sctp_generate_tag(const struct sctp_endpoint *ep);
+__u32 sctp_generate_tsn(const struct sctp_endpoint *ep);
+
+/* Extern declarations for major data structures.  */
+extern sctp_timer_event_t *sctp_timer_events[SCTP_NUM_TIMEOUT_TYPES];
+
+
+/* Get the size of a DATA chunk payload. */
+static inline __u16 sctp_data_size(struct sctp_chunk *chunk)
+{
+	__u16 size;
+
+	size = ntohs(chunk->chunk_hdr->length);
+	size -= sctp_datachk_len(&chunk->asoc->stream);
+
+	return size;
+}
+
+/* Compare two TSNs */
+#define TSN_lt(a,b)	\
+	(typecheck(__u32, a) && \
+	 typecheck(__u32, b) && \
+	 ((__s32)((a) - (b)) < 0))
+
+#define TSN_lte(a,b)	\
+	(typecheck(__u32, a) && \
+	 typecheck(__u32, b) && \
+	 ((__s32)((a) - (b)) <= 0))
+
+/* Compare two MIDs */
+#define MID_lt(a, b)	\
+	(typecheck(__u32, a) && \
+	 typecheck(__u32, b) && \
+	 ((__s32)((a) - (b)) < 0))
+
+/* Compare two SSNs */
+#define SSN_lt(a,b)		\
+	(typecheck(__u16, a) && \
+	 typecheck(__u16, b) && \
+	 ((__s16)((a) - (b)) < 0))
+
+/* ADDIP 3.1.1 */
+#define ADDIP_SERIAL_gte(a,b)	\
+	(typecheck(__u32, a) && \
+	 typecheck(__u32, b) && \
+	 ((__s32)((b) - (a)) <= 0))
+
+/* Check VTAG of the packet matches the sender's own tag. */
+static inline int
+sctp_vtag_verify(const struct sctp_chunk *chunk,
+		 const struct sctp_association *asoc)
+{
+	/* RFC 2960 Sec 8.5 When receiving an SCTP packet, the endpoint
+	 * MUST ensure that the value in the Verification Tag field of
+	 * the received SCTP packet matches its own Tag. If the received
+	 * Verification Tag value does not match the receiver's own
+	 * tag value, the receiver shall silently discard the packet...
+	 */
+	if (ntohl(chunk->sctp_hdr->vtag) != asoc->c.my_vtag)
+		return 0;
+
+	chunk->transport->encap_port = SCTP_INPUT_CB(chunk->skb)->encap_port;
+	return 1;
+}
+
+/* Check VTAG of the packet matches the sender's own tag and the T bit is
+ * not set, OR its peer's tag and the T bit is set in the Chunk Flags.
+ */
+static inline int
+sctp_vtag_verify_either(const struct sctp_chunk *chunk,
+			const struct sctp_association *asoc)
+{
+        /* RFC 2960 Section 8.5.1, sctpimpguide Section 2.41
+	 *
+	 * B) The receiver of a ABORT MUST accept the packet
+	 *    if the Verification Tag field of the packet matches its own tag
+	 *    and the T bit is not set
+	 *    OR
+	 *    it is set to its peer's tag and the T bit is set in the Chunk
+	 *    Flags.
+	 *    Otherwise, the receiver MUST silently discard the packet
+	 *    and take no further action.
+	 *
+	 * C) The receiver of a SHUTDOWN COMPLETE shall accept the packet
+	 *    if the Verification Tag field of the packet matches its own tag
+	 *    and the T bit is not set
+	 *    OR
+	 *    it is set to its peer's tag and the T bit is set in the Chunk
+	 *    Flags.
+	 *    Otherwise, the receiver MUST silently discard the packet
+	 *    and take no further action.  An endpoint MUST ignore the
+	 *    SHUTDOWN COMPLETE if it is not in the SHUTDOWN-ACK-SENT state.
+	 */
+        if ((!sctp_test_T_bit(chunk) &&
+             (ntohl(chunk->sctp_hdr->vtag) == asoc->c.my_vtag)) ||
+	    (sctp_test_T_bit(chunk) && asoc->c.peer_vtag &&
+	     (ntohl(chunk->sctp_hdr->vtag) == asoc->c.peer_vtag))) {
+                return 1;
+	}
+
+	return 0;
+}
+
+#endif /* __sctp_sm_h__ */