FM / linux

/usr/include/linux

Name	Size	Mode	Actions
android/	-	0755	rm
byteorder/	-	0755	rm
caif/	-	0755	rm
can/	-	0755	rm
cifs/	-	0755	rm
dvb/	-	0755	rm
genwqe/	-	0755	rm
hdlc/	-	0755	rm
hsi/	-	0755	rm
iio/	-	0755	rm
isdn/	-	0755	rm
misc/	-	0755	rm
mmc/	-	0755	rm
netfilter/	-	0755	rm
netfilter_arp/	-	0755	rm
netfilter_bridge/	-	0755	rm
netfilter_ipv4/	-	0755	rm
netfilter_ipv6/	-	0755	rm
nfsd/	-	0755	rm
raid/	-	0755	rm
sched/	-	0755	rm
spi/	-	0755	rm
sunrpc/	-	0755	rm
surface_aggregator/	-	0755	rm
tc_act/	-	0755	rm
tc_ematch/	-	0755	rm
usb/	-	0755	rm
a.out.h	6892	0644	edit dl rm
acct.h	3913	0644	edit dl rm
acrn.h	16686	0644	edit dl rm
adb.h	1140	0644	edit dl rm
adfs_fs.h	993	0644	edit dl rm
affs_hardblocks.h	1578	0644	edit dl rm
agpgart.h	3940	0644	edit dl rm
aio_abi.h	3398	0644	edit dl rm
am437x-vpfe.h	3681	0644	edit dl rm
apm_bios.h	3683	0644	edit dl rm
arcfb.h	213	0644	edit dl rm
arm_sdei.h	2751	0644	edit dl rm
aspeed-lpc-ctrl.h	1780	0644	edit dl rm
aspeed-p2a-ctrl.h	1906	0644	edit dl rm
atalk.h	1023	0644	edit dl rm
atm.h	7888	0644	edit dl rm
atmapi.h	952	0644	edit dl rm
atmarp.h	1296	0644	edit dl rm
atmbr2684.h	3271	0644	edit dl rm
atmclip.h	576	0644	edit dl rm
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atmlec.h	2381	0644	edit dl rm
atmmpc.h	4226	0644	edit dl rm
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atmsvc.h	1853	0644	edit dl rm
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atm_he.h	406	0644	edit dl rm
atm_idt77105.h	955	0644	edit dl rm
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atm_tcp.h	1622	0644	edit dl rm
atm_zatm.h	1540	0644	edit dl rm
audit.h	21570	0644	edit dl rm
auto_dev-ioctl.h	4986	0644	edit dl rm
auto_fs.h	6428	0644	edit dl rm
auto_fs4.h	451	0644	edit dl rm
auxvec.h	1597	0644	edit dl rm
ax25.h	2824	0644	edit dl rm
batadv_packet.h	20345	0644	edit dl rm
batman_adv.h	16887	0644	edit dl rm
baycom.h	883	0644	edit dl rm
bcm933xx_hcs.h	419	0644	edit dl rm
bfs_fs.h	1905	0644	edit dl rm
binfmts.h	776	0644	edit dl rm
bits.h	447	0644	edit dl rm
blkpg.h	904	0644	edit dl rm
blktrace_api.h	4701	0644	edit dl rm
blkzoned.h	6493	0644	edit dl rm
bpf.h	278639	0644	edit dl rm
bpfilter.h	465	0644	edit dl rm
bpf_common.h	1367	0644	edit dl rm
bpf_perf_event.h	529	0644	edit dl rm
bpqether.h	981	0644	edit dl rm
bsg.h	2494	0644	edit dl rm
bt-bmc.h	572	0644	edit dl rm
btf.h	5591	0644	edit dl rm
btrfs.h	30570	0644	edit dl rm
btrfs_tree.h	25829	0644	edit dl rm
cachefiles.h	1650	0644	edit dl rm
can.h	11496	0644	edit dl rm
capability.h	13491	0644	edit dl rm
capi.h	3124	0644	edit dl rm
cciss_defs.h	3281	0644	edit dl rm
cciss_ioctl.h	2761	0644	edit dl rm
ccs.h	767	0644	edit dl rm
cdrom.h	29561	0644	edit dl rm
cec-funcs.h	54419	0644	edit dl rm
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cfm_bridge.h	1456	0644	edit dl rm
cgroupstats.h	2219	0644	edit dl rm
chio.h	5282	0644	edit dl rm
close_range.h	377	0644	edit dl rm
cm4000_cs.h	1806	0644	edit dl rm
cn_proc.h	4149	0644	edit dl rm
coda.h	18216	0644	edit dl rm
coff.h	12549	0644	edit dl rm
connector.h	2253	0644	edit dl rm
const.h	987	0644	edit dl rm
coresight-stm.h	747	0644	edit dl rm
cramfs_fs.h	3555	0644	edit dl rm
cryptouser.h	5321	0644	edit dl rm
cuda.h	905	0644	edit dl rm
cxl_mem.h	7915	0644	edit dl rm
cycx_cfm.h	2990	0644	edit dl rm
dcbnl.h	25292	0644	edit dl rm
dccp.h	6436	0644	edit dl rm
devlink.h	23316	0644	edit dl rm
dlm.h	2553	0644	edit dl rm
dlmconstants.h	5080	0644	edit dl rm
dlm_device.h	2543	0644	edit dl rm
dlm_netlink.h	1159	0644	edit dl rm
dlm_plock.h	894	0644	edit dl rm
dm-ioctl.h	11753	0644	edit dl rm
dm-log-userspace.h	15191	0644	edit dl rm
dma-buf.h	5247	0644	edit dl rm
dma-heap.h	1394	0644	edit dl rm
dn.h	4642	0644	edit dl rm
dns_resolver.h	3949	0644	edit dl rm
dpll.h	8697	0644	edit dl rm
dqblk_xfs.h	9388	0644	edit dl rm
edd.h	5604	0644	edit dl rm
efs_fs_sb.h	2227	0644	edit dl rm
elf-em.h	2627	0644	edit dl rm
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elf.h	15042	0644	edit dl rm
errno.h	23	0644	edit dl rm
errqueue.h	1983	0644	edit dl rm
erspan.h	1059	0644	edit dl rm
ethtool.h	103855	0644	edit dl rm
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eventfd.h	264	0644	edit dl rm
eventpoll.h	2913	0644	edit dl rm
f2fs.h	3301	0644	edit dl rm
fadvise.h	842	0644	edit dl rm
falloc.h	3643	0644	edit dl rm
fanotify.h	7886	0644	edit dl rm
fb.h	16477	0644	edit dl rm
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fd.h	12117	0644	edit dl rm
fdreg.h	5364	0644	edit dl rm
fib_rules.h	2036	0644	edit dl rm
fiemap.h	2775	0644	edit dl rm
filter.h	2216	0644	edit dl rm
firewire-cdev.h	44240	0644	edit dl rm
firewire-constants.h	3231	0644	edit dl rm
fou.h	819	0644	edit dl rm
fpga-dfl.h	8728	0644	edit dl rm
fs.h	13186	0644	edit dl rm
fscrypt.h	6565	0644	edit dl rm
fsi.h	2255	0644	edit dl rm
fsl_hypervisor.h	7301	0644	edit dl rm
fsl_mc.h	734	0644	edit dl rm
fsmap.h	4393	0644	edit dl rm
fsverity.h	3185	0644	edit dl rm
fuse.h	25968	0644	edit dl rm
futex.h	6127	0644	edit dl rm
gameport.h	897	0644	edit dl rm
genetlink.h	2238	0644	edit dl rm
gen_stats.h	1526	0644	edit dl rm
gfs2_ondisk.h	14773	0644	edit dl rm
gpio.h	19922	0644	edit dl rm
gsmmux.h	4509	0644	edit dl rm
gtp.h	734	0644	edit dl rm
handshake.h	1646	0644	edit dl rm
hash_info.h	971	0644	edit dl rm
hdlc.h	637	0644	edit dl rm
hdlcdrv.h	2908	0644	edit dl rm
hdreg.h	22703	0644	edit dl rm
hid.h	2086	0644	edit dl rm
hiddev.h	6345	0644	edit dl rm
hidraw.h	1993	0644	edit dl rm
hpet.h	743	0644	edit dl rm
hsr_netlink.h	1101	0644	edit dl rm
hw_breakpoint.h	742	0644	edit dl rm
hyperv.h	11152	0644	edit dl rm
i2c-dev.h	1875	0644	edit dl rm
i2c.h	6890	0644	edit dl rm
i2o-dev.h	11555	0644	edit dl rm
i8k.h	1528	0644	edit dl rm
icmp.h	4785	0644	edit dl rm
icmpv6.h	4300	0644	edit dl rm
idxd.h	9328	0644	edit dl rm
if.h	10925	0644	edit dl rm
ife.h	351	0644	edit dl rm
if_addr.h	1886	0644	edit dl rm
if_addrlabel.h	721	0644	edit dl rm
if_alg.h	1566	0644	edit dl rm
if_arcnet.h	3717	0644	edit dl rm
if_arp.h	6565	0644	edit dl rm
if_bonding.h	5145	0644	edit dl rm
if_bridge.h	20755	0644	edit dl rm
if_cablemodem.h	986	0644	edit dl rm
if_eql.h	1349	0644	edit dl rm
if_ether.h	8410	0644	edit dl rm
if_fc.h	1738	0644	edit dl rm
if_fddi.h	4369	0644	edit dl rm
if_hippi.h	4235	0644	edit dl rm
if_infiniband.h	1245	0644	edit dl rm
if_link.h	54131	0644	edit dl rm
if_ltalk.h	210	0644	edit dl rm
if_macsec.h	6503	0644	edit dl rm
if_packet.h	8183	0644	edit dl rm
if_phonet.h	424	0644	edit dl rm
if_plip.h	660	0644	edit dl rm
if_ppp.h	29	0644	edit dl rm
if_pppol2tp.h	3303	0644	edit dl rm
if_pppox.h	4879	0644	edit dl rm
if_slip.h	872	0644	edit dl rm
if_team.h	2600	0644	edit dl rm
if_tun.h	4098	0644	edit dl rm
if_tunnel.h	5488	0644	edit dl rm
if_vlan.h	1831	0644	edit dl rm
if_x25.h	881	0644	edit dl rm
if_xdp.h	5414	0644	edit dl rm
igmp.h	3064	0644	edit dl rm
ila.h	1246	0644	edit dl rm
in.h	10486	0644	edit dl rm
in6.h	7537	0644	edit dl rm
inet_diag.h	5017	0644	edit dl rm
inotify.h	3292	0644	edit dl rm
input-event-codes.h	30203	0644	edit dl rm
input.h	16217	0644	edit dl rm
in_route.h	936	0644	edit dl rm
ioctl.h	163	0644	edit dl rm
iommufd.h	37327	0644	edit dl rm
ioprio.h	4175	0644	edit dl rm
io_uring.h	20887	0644	edit dl rm
ip.h	4813	0644	edit dl rm
ip6_tunnel.h	1953	0644	edit dl rm
ipc.h	2101	0644	edit dl rm
ipmi.h	15442	0644	edit dl rm
ipmi_bmc.h	488	0644	edit dl rm
ipmi_msgdefs.h	3430	0644	edit dl rm
ipmi_ssif_bmc.h	441	0644	edit dl rm
ipsec.h	947	0644	edit dl rm
ipv6.h	4169	0644	edit dl rm
ipv6_route.h	1908	0644	edit dl rm
ipx.h	2347	0644	edit dl rm
ip_vs.h	14135	0644	edit dl rm
irqnr.h	104	0644	edit dl rm
iso_fs.h	6485	0644	edit dl rm
isst_if.h	15281	0644	edit dl rm
ivtv.h	3022	0644	edit dl rm
ivtvfb.h	1207	0644	edit dl rm
jffs2.h	6815	0644	edit dl rm
joystick.h	3434	0644	edit dl rm
kcm.h	822	0644	edit dl rm
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kcov.h	1963	0644	edit dl rm
kd.h	6452	0644	edit dl rm
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kernel.h	194	0644	edit dl rm
kernelcapi.h	1019	0644	edit dl rm
kexec.h	2097	0644	edit dl rm
keyboard.h	13459	0644	edit dl rm
keyctl.h	5996	0644	edit dl rm
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kvm.h	48372	0644	edit dl rm
kvm_para.h	1001	0644	edit dl rm
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lp.h	4190	0644	edit dl rm
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mptcp.h	3763	0644	edit dl rm
mptcp_pm.h	4407	0644	edit dl rm
mqueue.h	2201	0644	edit dl rm
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mrp_bridge.h	1708	0644	edit dl rm
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msg.h	3386	0644	edit dl rm
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mtio.h	8175	0644	edit dl rm
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net.h	2085	0644	edit dl rm
netconf.h	614	0644	edit dl rm
netdev.h	5786	0644	edit dl rm
netdevice.h	2253	0644	edit dl rm
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netfilter_arp.h	445	0644	edit dl rm
netfilter_bridge.h	1168	0644	edit dl rm
netfilter_decnet.h	1758	0644	edit dl rm
netfilter_ipv4.h	1488	0644	edit dl rm
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nfs_fs.h	1654	0644	edit dl rm
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nvram.h	532	0644	edit dl rm
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omapfb.h	5918	0644	edit dl rm
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packet_diag.h	1672	0644	edit dl rm
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pci.h	1380	0644	edit dl rm
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pci_regs.h	63374	0644	edit dl rm
perf_event.h	43709	0644	edit dl rm
personality.h	2097	0644	edit dl rm
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string.h	238	0644	edit dl rm
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sysinfo.h	1049	0644	edit dl rm
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taskstats.h	8322	0644	edit dl rm
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Edit: /usr/include/linux/sctp.h (36022B)

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/* SCTP kernel implementation
 * (C) Copyright IBM Corp. 2001, 2004
 * Copyright (c) 1999-2000 Cisco, Inc.
 * Copyright (c) 1999-2001 Motorola, Inc.
 * Copyright (c) 2002 Intel Corp.
 *
 * This file is part of the SCTP kernel implementation
 *
 * This header represents the structures and constants needed to support
 * the SCTP Extension to the Sockets API.
 *
 * This SCTP implementation is free software;
 * you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This SCTP implementation is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <linux-sctp@vger.kernel.org>
 *
 * Or submit a bug report through the following website:
 *    http://www.sf.net/projects/lksctp
 *
 * Written or modified by:
 *    La Monte H.P. Yarroll    <piggy@acm.org>
 *    R. Stewart               <randall@sctp.chicago.il.us>
 *    K. Morneau               <kmorneau@cisco.com>
 *    Q. Xie                   <qxie1@email.mot.com>
 *    Karl Knutson             <karl@athena.chicago.il.us>
 *    Jon Grimm                <jgrimm@us.ibm.com>
 *    Daisy Chang              <daisyc@us.ibm.com>
 *    Ryan Layer               <rmlayer@us.ibm.com>
 *    Ardelle Fan              <ardelle.fan@intel.com>
 *    Sridhar Samudrala        <sri@us.ibm.com>
 *    Inaky Perez-Gonzalez     <inaky.gonzalez@intel.com>
 *    Vlad Yasevich            <vladislav.yasevich@hp.com>
 *
 * Any bugs reported given to us we will try to fix... any fixes shared will
 * be incorporated into the next SCTP release.
 */

#ifndef _SCTP_H
#define _SCTP_H

#include <linux/types.h>
#include <linux/socket.h>

typedef __s32 sctp_assoc_t;

#define SCTP_FUTURE_ASSOC	0
#define SCTP_CURRENT_ASSOC	1
#define SCTP_ALL_ASSOC		2

/* The following symbols come from the Sockets API Extensions for
 * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
 */
#define SCTP_RTOINFO	0
#define SCTP_ASSOCINFO  1
#define SCTP_INITMSG	2
#define SCTP_NODELAY	3		/* Get/set nodelay option. */
#define SCTP_AUTOCLOSE	4
#define SCTP_SET_PEER_PRIMARY_ADDR 5
#define SCTP_PRIMARY_ADDR	6
#define SCTP_ADAPTATION_LAYER	7
#define SCTP_DISABLE_FRAGMENTS	8
#define SCTP_PEER_ADDR_PARAMS	9
#define SCTP_DEFAULT_SEND_PARAM	10
#define SCTP_EVENTS	11
#define SCTP_I_WANT_MAPPED_V4_ADDR 12	/* Turn on/off mapped v4 addresses  */
#define SCTP_MAXSEG	13		/* Get/set maximum fragment. */
#define SCTP_STATUS	14
#define SCTP_GET_PEER_ADDR_INFO	15
#define SCTP_DELAYED_ACK_TIME	16
#define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME
#define SCTP_DELAYED_SACK SCTP_DELAYED_ACK_TIME
#define SCTP_CONTEXT	17
#define SCTP_FRAGMENT_INTERLEAVE	18
#define SCTP_PARTIAL_DELIVERY_POINT	19 /* Set/Get partial delivery point */
#define SCTP_MAX_BURST	20		/* Set/Get max burst */
#define SCTP_AUTH_CHUNK	21	/* Set only: add a chunk type to authenticate */
#define SCTP_HMAC_IDENT	22
#define SCTP_AUTH_KEY	23
#define SCTP_AUTH_ACTIVE_KEY	24
#define SCTP_AUTH_DELETE_KEY	25
#define SCTP_PEER_AUTH_CHUNKS	26	/* Read only */
#define SCTP_LOCAL_AUTH_CHUNKS	27	/* Read only */
#define SCTP_GET_ASSOC_NUMBER	28	/* Read only */
#define SCTP_GET_ASSOC_ID_LIST	29	/* Read only */
#define SCTP_AUTO_ASCONF       30
#define SCTP_PEER_ADDR_THLDS	31
#define SCTP_RECVRCVINFO	32
#define SCTP_RECVNXTINFO	33
#define SCTP_DEFAULT_SNDINFO	34
#define SCTP_AUTH_DEACTIVATE_KEY	35
#define SCTP_REUSE_PORT		36
#define SCTP_PEER_ADDR_THLDS_V2	37

/* Internal Socket Options. Some of the sctp library functions are
 * implemented using these socket options.
 */
#define SCTP_SOCKOPT_BINDX_ADD	100	/* BINDX requests for adding addrs */
#define SCTP_SOCKOPT_BINDX_REM	101	/* BINDX requests for removing addrs. */
#define SCTP_SOCKOPT_PEELOFF	102	/* peel off association. */
/* Options 104-106 are deprecated and removed. Do not use this space */
#define SCTP_SOCKOPT_CONNECTX_OLD	107	/* CONNECTX old requests. */
#define SCTP_GET_PEER_ADDRS	108		/* Get all peer address. */
#define SCTP_GET_LOCAL_ADDRS	109		/* Get all local address. */
#define SCTP_SOCKOPT_CONNECTX	110		/* CONNECTX requests. */
#define SCTP_SOCKOPT_CONNECTX3	111	/* CONNECTX requests (updated) */
#define SCTP_GET_ASSOC_STATS	112	/* Read only */
#define SCTP_PR_SUPPORTED	113
#define SCTP_DEFAULT_PRINFO	114
#define SCTP_PR_ASSOC_STATUS	115
#define SCTP_PR_STREAM_STATUS	116
#define SCTP_RECONFIG_SUPPORTED	117
#define SCTP_ENABLE_STREAM_RESET	118
#define SCTP_RESET_STREAMS	119
#define SCTP_RESET_ASSOC	120
#define SCTP_ADD_STREAMS	121
#define SCTP_SOCKOPT_PEELOFF_FLAGS 122
#define SCTP_STREAM_SCHEDULER	123
#define SCTP_STREAM_SCHEDULER_VALUE	124
#define SCTP_INTERLEAVING_SUPPORTED	125
#define SCTP_SENDMSG_CONNECT	126
#define SCTP_EVENT	127
#define SCTP_ASCONF_SUPPORTED	128
#define SCTP_AUTH_SUPPORTED	129
#define SCTP_ECN_SUPPORTED	130
#define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE	131
#define SCTP_EXPOSE_PF_STATE	SCTP_EXPOSE_POTENTIALLY_FAILED_STATE
#define SCTP_REMOTE_UDP_ENCAPS_PORT	132
#define SCTP_PLPMTUD_PROBE_INTERVAL	133

/* PR-SCTP policies */
#define SCTP_PR_SCTP_NONE	0x0000
#define SCTP_PR_SCTP_TTL	0x0010
#define SCTP_PR_SCTP_RTX	0x0020
#define SCTP_PR_SCTP_PRIO	0x0030
#define SCTP_PR_SCTP_MAX	SCTP_PR_SCTP_PRIO
#define SCTP_PR_SCTP_MASK	0x0030

#define __SCTP_PR_INDEX(x)	((x >> 4) - 1)
#define SCTP_PR_INDEX(x)	__SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x)

#define SCTP_PR_POLICY(x)	((x) & SCTP_PR_SCTP_MASK)
#define SCTP_PR_SET_POLICY(flags, x)	\
	do {				\
		flags &= ~SCTP_PR_SCTP_MASK;	\
		flags |= x;		\
	} while (0)

#define SCTP_PR_TTL_ENABLED(x)	(SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL)
#define SCTP_PR_RTX_ENABLED(x)	(SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX)
#define SCTP_PR_PRIO_ENABLED(x)	(SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO)

/* For enable stream reset */
#define SCTP_ENABLE_RESET_STREAM_REQ	0x01
#define SCTP_ENABLE_RESET_ASSOC_REQ	0x02
#define SCTP_ENABLE_CHANGE_ASSOC_REQ	0x04
#define SCTP_ENABLE_STRRESET_MASK	0x07

#define SCTP_STREAM_RESET_INCOMING	0x01
#define SCTP_STREAM_RESET_OUTGOING	0x02

/* These are bit fields for msghdr->msg_flags.  See section 5.1.  */
/* On user space Linux, these live in <bits/socket.h> as an enum.  */
enum sctp_msg_flags {
	MSG_NOTIFICATION = 0x8000,
#define MSG_NOTIFICATION MSG_NOTIFICATION
};

/* 5.3.1 SCTP Initiation Structure (SCTP_INIT)
 *
 *   This cmsghdr structure provides information for initializing new
 *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option
 *   uses this same data structure.  This structure is not used for
 *   recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   ----------------------
 *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg
 */
struct sctp_initmsg {
	__u16 sinit_num_ostreams;
	__u16 sinit_max_instreams;
	__u16 sinit_max_attempts;
	__u16 sinit_max_init_timeo;
};

/* 5.3.2 SCTP Header Information Structure (SCTP_SNDRCV)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg() and
 *   describes SCTP header information about a received message through
 *   recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   ----------------------
 *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 */
struct sctp_sndrcvinfo {
	__u16 sinfo_stream;
	__u16 sinfo_ssn;
	__u16 sinfo_flags;
	__u32 sinfo_ppid;
	__u32 sinfo_context;
	__u32 sinfo_timetolive;
	__u32 sinfo_tsn;
	__u32 sinfo_cumtsn;
	sctp_assoc_t sinfo_assoc_id;
};

/* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------
 *   IPPROTO_SCTP  SCTP_SNDINFO   struct sctp_sndinfo
 */
struct sctp_sndinfo {
	__u16 snd_sid;
	__u16 snd_flags;
	__u32 snd_ppid;
	__u32 snd_context;
	sctp_assoc_t snd_assoc_id;
};

/* 5.3.5 SCTP Receive Information Structure (SCTP_RCVINFO)
 *
 *   This cmsghdr structure describes SCTP receive information
 *   about a received message through recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------
 *   IPPROTO_SCTP  SCTP_RCVINFO   struct sctp_rcvinfo
 */
struct sctp_rcvinfo {
	__u16 rcv_sid;
	__u16 rcv_ssn;
	__u16 rcv_flags;
	__u32 rcv_ppid;
	__u32 rcv_tsn;
	__u32 rcv_cumtsn;
	__u32 rcv_context;
	sctp_assoc_t rcv_assoc_id;
};

/* 5.3.6 SCTP Next Receive Information Structure (SCTP_NXTINFO)
 *
 *   This cmsghdr structure describes SCTP receive information
 *   of the next message that will be delivered through recvmsg()
 *   if this information is already available when delivering
 *   the current message.
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------
 *   IPPROTO_SCTP  SCTP_NXTINFO   struct sctp_nxtinfo
 */
struct sctp_nxtinfo {
	__u16 nxt_sid;
	__u16 nxt_flags;
	__u32 nxt_ppid;
	__u32 nxt_length;
	sctp_assoc_t nxt_assoc_id;
};

/* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------
 *   IPPROTO_SCTP  SCTP_PRINFO    struct sctp_prinfo
 */
struct sctp_prinfo {
	__u16 pr_policy;
	__u32 pr_value;
};

/* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   -------------------
 *   IPPROTO_SCTP  SCTP_AUTHINFO  struct sctp_authinfo
 */
struct sctp_authinfo {
	__u16 auth_keynumber;
};

/*
 *  sinfo_flags: 16 bits (unsigned integer)
 *
 *   This field may contain any of the following flags and is composed of
 *   a bitwise OR of these values.
 */
enum sctp_sinfo_flags {
	SCTP_UNORDERED		= (1 << 0), /* Send/receive message unordered. */
	SCTP_ADDR_OVER		= (1 << 1), /* Override the primary destination. */
	SCTP_ABORT		= (1 << 2), /* Send an ABORT message to the peer. */
	SCTP_SACK_IMMEDIATELY	= (1 << 3), /* SACK should be sent without delay. */
	/* 2 bits here have been used by SCTP_PR_SCTP_MASK */
	SCTP_SENDALL		= (1 << 6),
	SCTP_PR_SCTP_ALL	= (1 << 7),
	SCTP_NOTIFICATION	= MSG_NOTIFICATION, /* Next message is not user msg but notification. */
	SCTP_EOF		= MSG_FIN,  /* Initiate graceful shutdown process. */
};

typedef union {
	__u8   			raw;
	struct sctp_initmsg	init;
	struct sctp_sndrcvinfo	sndrcv;
} sctp_cmsg_data_t;

/* These are cmsg_types.  */
typedef enum sctp_cmsg_type {
	SCTP_INIT,		/* 5.2.1 SCTP Initiation Structure */
#define SCTP_INIT	SCTP_INIT
	SCTP_SNDRCV,		/* 5.2.2 SCTP Header Information Structure */
#define SCTP_SNDRCV	SCTP_SNDRCV
	SCTP_SNDINFO,		/* 5.3.4 SCTP Send Information Structure */
#define SCTP_SNDINFO	SCTP_SNDINFO
	SCTP_RCVINFO,		/* 5.3.5 SCTP Receive Information Structure */
#define SCTP_RCVINFO	SCTP_RCVINFO
	SCTP_NXTINFO,		/* 5.3.6 SCTP Next Receive Information Structure */
#define SCTP_NXTINFO	SCTP_NXTINFO
	SCTP_PRINFO,		/* 5.3.7 SCTP PR-SCTP Information Structure */
#define SCTP_PRINFO	SCTP_PRINFO
	SCTP_AUTHINFO,		/* 5.3.8 SCTP AUTH Information Structure */
#define SCTP_AUTHINFO	SCTP_AUTHINFO
	SCTP_DSTADDRV4,		/* 5.3.9 SCTP Destination IPv4 Address Structure */
#define SCTP_DSTADDRV4	SCTP_DSTADDRV4
	SCTP_DSTADDRV6,		/* 5.3.10 SCTP Destination IPv6 Address Structure */
#define SCTP_DSTADDRV6	SCTP_DSTADDRV6
} sctp_cmsg_t;

/*
 * 5.3.1.1 SCTP_ASSOC_CHANGE
 *
 *   Communication notifications inform the ULP that an SCTP association
 *   has either begun or ended. The identifier for a new association is
 *   provided by this notificaion. The notification information has the
 *   following format:
 *
 */
struct sctp_assoc_change {
	__u16 sac_type;
	__u16 sac_flags;
	__u32 sac_length;
	__u16 sac_state;
	__u16 sac_error;
	__u16 sac_outbound_streams;
	__u16 sac_inbound_streams;
	sctp_assoc_t sac_assoc_id;
	__u8 sac_info[0];
};

/*
 *   sac_state: 32 bits (signed integer)
 *
 *   This field holds one of a number of values that communicate the
 *   event that happened to the association.  They include:
 *
 *   Note:  The following state names deviate from the API draft as
 *   the names clash too easily with other kernel symbols.
 */
enum sctp_sac_state {
	SCTP_COMM_UP,
	SCTP_COMM_LOST,
	SCTP_RESTART,
	SCTP_SHUTDOWN_COMP,
	SCTP_CANT_STR_ASSOC,
};

/*
 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
 *
 *   When a destination address on a multi-homed peer encounters a change
 *   an interface details event is sent.  The information has the
 *   following structure:
 */
struct sctp_paddr_change {
	__u16 spc_type;
	__u16 spc_flags;
	__u32 spc_length;
	struct sockaddr_storage spc_aaddr;
	int spc_state;
	int spc_error;
	sctp_assoc_t spc_assoc_id;
} __attribute__((packed, aligned(4)));

/*
 *    spc_state:  32 bits (signed integer)
 *
 *   This field holds one of a number of values that communicate the
 *   event that happened to the address.  They include:
 */
enum sctp_spc_state {
	SCTP_ADDR_AVAILABLE,
	SCTP_ADDR_UNREACHABLE,
	SCTP_ADDR_REMOVED,
	SCTP_ADDR_ADDED,
	SCTP_ADDR_MADE_PRIM,
	SCTP_ADDR_CONFIRMED,
	SCTP_ADDR_POTENTIALLY_FAILED,
#define SCTP_ADDR_PF	SCTP_ADDR_POTENTIALLY_FAILED
};

/*
 * 5.3.1.3 SCTP_REMOTE_ERROR
 *
 *   A remote peer may send an Operational Error message to its peer.
 *   This message indicates a variety of error conditions on an
 *   association. The entire error TLV as it appears on the wire is
 *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP
 *   specification [SCTP] and any extensions for a list of possible
 *   error formats. SCTP error TLVs have the format:
 */
struct sctp_remote_error {
	__u16 sre_type;
	__u16 sre_flags;
	__u32 sre_length;
	__be16 sre_error;
	sctp_assoc_t sre_assoc_id;
	__u8 sre_data[0];
};

/*
 * 5.3.1.4 SCTP_SEND_FAILED
 *
 *   If SCTP cannot deliver a message it may return the message as a
 *   notification.
 */
struct sctp_send_failed {
	__u16 ssf_type;
	__u16 ssf_flags;
	__u32 ssf_length;
	__u32 ssf_error;
	struct sctp_sndrcvinfo ssf_info;
	sctp_assoc_t ssf_assoc_id;
	__u8 ssf_data[0];
};

struct sctp_send_failed_event {
	__u16 ssf_type;
	__u16 ssf_flags;
	__u32 ssf_length;
	__u32 ssf_error;
	struct sctp_sndinfo ssfe_info;
	sctp_assoc_t ssf_assoc_id;
	__u8 ssf_data[0];
};

/*
 *   ssf_flags: 16 bits (unsigned integer)
 *
 *   The flag value will take one of the following values
 *
 *   SCTP_DATA_UNSENT  - Indicates that the data was never put on
 *                       the wire.
 *
 *   SCTP_DATA_SENT    - Indicates that the data was put on the wire.
 *                       Note that this does not necessarily mean that the
 *                       data was (or was not) successfully delivered.
 */
enum sctp_ssf_flags {
	SCTP_DATA_UNSENT,
	SCTP_DATA_SENT,
};

/*
 * 5.3.1.5 SCTP_SHUTDOWN_EVENT
 *
 *   When a peer sends a SHUTDOWN, SCTP delivers this notification to
 *   inform the application that it should cease sending data.
 */
struct sctp_shutdown_event {
	__u16 sse_type;
	__u16 sse_flags;
	__u32 sse_length;
	sctp_assoc_t sse_assoc_id;
};

/*
 * 5.3.1.6 SCTP_ADAPTATION_INDICATION
 *
 *   When a peer sends a Adaptation Layer Indication parameter , SCTP
 *   delivers this notification to inform the application
 *   that of the peers requested adaptation layer.
 */
struct sctp_adaptation_event {
	__u16 sai_type;
	__u16 sai_flags;
	__u32 sai_length;
	__u32 sai_adaptation_ind;
	sctp_assoc_t sai_assoc_id;
};

/*
 * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
 *
 *   When a receiver is engaged in a partial delivery of a
 *   message this notification will be used to indicate
 *   various events.
 */
struct sctp_pdapi_event {
	__u16 pdapi_type;
	__u16 pdapi_flags;
	__u32 pdapi_length;
	__u32 pdapi_indication;
	sctp_assoc_t pdapi_assoc_id;
	__u32 pdapi_stream;
	__u32 pdapi_seq;
};

enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };

/*
 * 5.3.1.8.  SCTP_AUTHENTICATION_EVENT
 *
 *  When a receiver is using authentication this message will provide
 *  notifications regarding new keys being made active as well as errors.
 */
struct sctp_authkey_event {
	__u16 auth_type;
	__u16 auth_flags;
	__u32 auth_length;
	__u16 auth_keynumber;
	__u16 auth_altkeynumber;
	__u32 auth_indication;
	sctp_assoc_t auth_assoc_id;
};

enum {
	SCTP_AUTH_NEW_KEY,
#define	SCTP_AUTH_NEWKEY	SCTP_AUTH_NEW_KEY /* compatible with before */
	SCTP_AUTH_FREE_KEY,
	SCTP_AUTH_NO_AUTH,
};

/*
 * 6.1.9. SCTP_SENDER_DRY_EVENT
 *
 * When the SCTP stack has no more user data to send or retransmit, this
 * notification is given to the user. Also, at the time when a user app
 * subscribes to this event, if there is no data to be sent or
 * retransmit, the stack will immediately send up this notification.
 */
struct sctp_sender_dry_event {
	__u16 sender_dry_type;
	__u16 sender_dry_flags;
	__u32 sender_dry_length;
	sctp_assoc_t sender_dry_assoc_id;
};

#define SCTP_STREAM_RESET_INCOMING_SSN	0x0001
#define SCTP_STREAM_RESET_OUTGOING_SSN	0x0002
#define SCTP_STREAM_RESET_DENIED	0x0004
#define SCTP_STREAM_RESET_FAILED	0x0008
struct sctp_stream_reset_event {
	__u16 strreset_type;
	__u16 strreset_flags;
	__u32 strreset_length;
	sctp_assoc_t strreset_assoc_id;
	__u16 strreset_stream_list[];
};

#define SCTP_ASSOC_RESET_DENIED		0x0004
#define SCTP_ASSOC_RESET_FAILED		0x0008
struct sctp_assoc_reset_event {
	__u16 assocreset_type;
	__u16 assocreset_flags;
	__u32 assocreset_length;
	sctp_assoc_t assocreset_assoc_id;
	__u32 assocreset_local_tsn;
	__u32 assocreset_remote_tsn;
};

#define SCTP_ASSOC_CHANGE_DENIED	0x0004
#define SCTP_ASSOC_CHANGE_FAILED	0x0008
#define SCTP_STREAM_CHANGE_DENIED	SCTP_ASSOC_CHANGE_DENIED
#define SCTP_STREAM_CHANGE_FAILED	SCTP_ASSOC_CHANGE_FAILED
struct sctp_stream_change_event {
	__u16 strchange_type;
	__u16 strchange_flags;
	__u32 strchange_length;
	sctp_assoc_t strchange_assoc_id;
	__u16 strchange_instrms;
	__u16 strchange_outstrms;
};

/*
 * Described in Section 7.3
 *   Ancillary Data and Notification Interest Options
 */
struct sctp_event_subscribe {
	__u8 sctp_data_io_event;
	__u8 sctp_association_event;
	__u8 sctp_address_event;
	__u8 sctp_send_failure_event;
	__u8 sctp_peer_error_event;
	__u8 sctp_shutdown_event;
	__u8 sctp_partial_delivery_event;
	__u8 sctp_adaptation_layer_event;
	__u8 sctp_authentication_event;
	__u8 sctp_sender_dry_event;
	__u8 sctp_stream_reset_event;
	__u8 sctp_assoc_reset_event;
	__u8 sctp_stream_change_event;
	__u8 sctp_send_failure_event_event;
};

/*
 * 5.3.1 SCTP Notification Structure
 *
 *   The notification structure is defined as the union of all
 *   notification types.
 *
 */
union sctp_notification {
	struct {
		__u16 sn_type;             /* Notification type. */
		__u16 sn_flags;
		__u32 sn_length;
	} sn_header;
	struct sctp_assoc_change sn_assoc_change;
	struct sctp_paddr_change sn_paddr_change;
	struct sctp_remote_error sn_remote_error;
	struct sctp_send_failed sn_send_failed;
	struct sctp_shutdown_event sn_shutdown_event;
	struct sctp_adaptation_event sn_adaptation_event;
	struct sctp_pdapi_event sn_pdapi_event;
	struct sctp_authkey_event sn_authkey_event;
	struct sctp_sender_dry_event sn_sender_dry_event;
	struct sctp_stream_reset_event sn_strreset_event;
	struct sctp_assoc_reset_event sn_assocreset_event;
	struct sctp_stream_change_event sn_strchange_event;
	struct sctp_send_failed_event sn_send_failed_event;
};

/* Section 5.3.1
 * All standard values for sn_type flags are greater than 2^15.
 * Values from 2^15 and down are reserved.
 */

enum sctp_sn_type {
	SCTP_SN_TYPE_BASE	= (1<<15),
	SCTP_DATA_IO_EVENT	= SCTP_SN_TYPE_BASE,
#define SCTP_DATA_IO_EVENT		SCTP_DATA_IO_EVENT
	SCTP_ASSOC_CHANGE,
#define SCTP_ASSOC_CHANGE		SCTP_ASSOC_CHANGE
	SCTP_PEER_ADDR_CHANGE,
#define SCTP_PEER_ADDR_CHANGE		SCTP_PEER_ADDR_CHANGE
	SCTP_SEND_FAILED,
#define SCTP_SEND_FAILED		SCTP_SEND_FAILED
	SCTP_REMOTE_ERROR,
#define SCTP_REMOTE_ERROR		SCTP_REMOTE_ERROR
	SCTP_SHUTDOWN_EVENT,
#define SCTP_SHUTDOWN_EVENT		SCTP_SHUTDOWN_EVENT
	SCTP_PARTIAL_DELIVERY_EVENT,
#define SCTP_PARTIAL_DELIVERY_EVENT	SCTP_PARTIAL_DELIVERY_EVENT
	SCTP_ADAPTATION_INDICATION,
#define SCTP_ADAPTATION_INDICATION	SCTP_ADAPTATION_INDICATION
	SCTP_AUTHENTICATION_EVENT,
#define SCTP_AUTHENTICATION_INDICATION	SCTP_AUTHENTICATION_EVENT
	SCTP_SENDER_DRY_EVENT,
#define SCTP_SENDER_DRY_EVENT		SCTP_SENDER_DRY_EVENT
	SCTP_STREAM_RESET_EVENT,
#define SCTP_STREAM_RESET_EVENT		SCTP_STREAM_RESET_EVENT
	SCTP_ASSOC_RESET_EVENT,
#define SCTP_ASSOC_RESET_EVENT		SCTP_ASSOC_RESET_EVENT
	SCTP_STREAM_CHANGE_EVENT,
#define SCTP_STREAM_CHANGE_EVENT	SCTP_STREAM_CHANGE_EVENT
	SCTP_SEND_FAILED_EVENT,
#define SCTP_SEND_FAILED_EVENT		SCTP_SEND_FAILED_EVENT
	SCTP_SN_TYPE_MAX	= SCTP_SEND_FAILED_EVENT,
#define SCTP_SN_TYPE_MAX		SCTP_SN_TYPE_MAX
};

/* Notification error codes used to fill up the error fields in some
 * notifications.
 * SCTP_PEER_ADDRESS_CHAGE 	: spc_error
 * SCTP_ASSOC_CHANGE		: sac_error
 * These names should be potentially included in the draft 04 of the SCTP
 * sockets API specification.
 */
typedef enum sctp_sn_error {
	SCTP_FAILED_THRESHOLD,
	SCTP_RECEIVED_SACK,
	SCTP_HEARTBEAT_SUCCESS,
	SCTP_RESPONSE_TO_USER_REQ,
	SCTP_INTERNAL_ERROR,
	SCTP_SHUTDOWN_GUARD_EXPIRES,
	SCTP_PEER_FAULTY,
} sctp_sn_error_t;

/*
 * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
 *
 *   The protocol parameters used to initialize and bound retransmission
 *   timeout (RTO) are tunable.  See [SCTP] for more information on how
 *   these parameters are used in RTO calculation.
 */
struct sctp_rtoinfo {
	sctp_assoc_t	srto_assoc_id;
	__u32		srto_initial;
	__u32		srto_max;
	__u32		srto_min;
};

/*
 * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
 *
 *   This option is used to both examine and set various association and
 *   endpoint parameters.
 */
struct sctp_assocparams {
	sctp_assoc_t	sasoc_assoc_id;
	__u16		sasoc_asocmaxrxt;
	__u16		sasoc_number_peer_destinations;
	__u32		sasoc_peer_rwnd;
	__u32		sasoc_local_rwnd;
	__u32		sasoc_cookie_life;
};

/*
 * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
 *
 *  Requests that the peer mark the enclosed address as the association
 *  primary. The enclosed address must be one of the association's
 *  locally bound addresses. The following structure is used to make a
 *   set primary request:
 */
struct sctp_setpeerprim {
	sctp_assoc_t            sspp_assoc_id;
	struct sockaddr_storage sspp_addr;
} __attribute__((packed, aligned(4)));

/*
 * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
 *
 *  Requests that the local SCTP stack use the enclosed peer address as
 *  the association primary. The enclosed address must be one of the
 *  association peer's addresses. The following structure is used to
 *  make a set peer primary request:
 */
struct sctp_prim {
	sctp_assoc_t            ssp_assoc_id;
	struct sockaddr_storage ssp_addr;
} __attribute__((packed, aligned(4)));

/* For backward compatibility use, define the old name too */
#define sctp_setprim	sctp_prim

/*
 * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
 *
 * Requests that the local endpoint set the specified Adaptation Layer
 * Indication parameter for all future INIT and INIT-ACK exchanges.
 */
struct sctp_setadaptation {
	__u32	ssb_adaptation_ind;
};

/*
 * 7.1.13 Peer Address Parameters  (SCTP_PEER_ADDR_PARAMS)
 *
 *   Applications can enable or disable heartbeats for any peer address
 *   of an association, modify an address's heartbeat interval, force a
 *   heartbeat to be sent immediately, and adjust the address's maximum
 *   number of retransmissions sent before an address is considered
 *   unreachable. The following structure is used to access and modify an
 *   address's parameters:
 */
enum  sctp_spp_flags {
	SPP_HB_ENABLE = 1<<0,		/*Enable heartbeats*/
	SPP_HB_DISABLE = 1<<1,		/*Disable heartbeats*/
	SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
	SPP_HB_DEMAND = 1<<2,		/*Send heartbeat immediately*/
	SPP_PMTUD_ENABLE = 1<<3,	/*Enable PMTU discovery*/
	SPP_PMTUD_DISABLE = 1<<4,	/*Disable PMTU discovery*/
	SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
	SPP_SACKDELAY_ENABLE = 1<<5,	/*Enable SACK*/
	SPP_SACKDELAY_DISABLE = 1<<6,	/*Disable SACK*/
	SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
	SPP_HB_TIME_IS_ZERO = 1<<7,	/* Set HB delay to 0 */
	SPP_IPV6_FLOWLABEL = 1<<8,
	SPP_DSCP = 1<<9,
};

struct sctp_paddrparams {
	sctp_assoc_t		spp_assoc_id;
	struct sockaddr_storage	spp_address;
	__u32			spp_hbinterval;
	__u16			spp_pathmaxrxt;
	__u32			spp_pathmtu;
	__u32			spp_sackdelay;
	__u32			spp_flags;
	__u32			spp_ipv6_flowlabel;
	__u8			spp_dscp;
} __attribute__((packed, aligned(4)));

/*
 * 7.1.18.  Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
 *
 * This set option adds a chunk type that the user is requesting to be
 * received only in an authenticated way.  Changes to the list of chunks
 * will only effect future associations on the socket.
 */
struct sctp_authchunk {
	__u8		sauth_chunk;
};

/*
 * 7.1.19.  Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
 *
 * This option gets or sets the list of HMAC algorithms that the local
 * endpoint requires the peer to use.
 */
/* This here is only used by user space as is. It might not be a good idea
 * to export/reveal the whole structure with reserved fields etc.
 */
enum {
	SCTP_AUTH_HMAC_ID_SHA1 = 1,
	SCTP_AUTH_HMAC_ID_SHA256 = 3,
};

struct sctp_hmacalgo {
	__u32		shmac_num_idents;
	__u16		shmac_idents[];
};

/* Sadly, user and kernel space have different names for
 * this structure member, so this is to not break anything.
 */
#define shmac_number_of_idents	shmac_num_idents

/*
 * 7.1.20.  Set a shared key (SCTP_AUTH_KEY)
 *
 * This option will set a shared secret key which is used to build an
 * association shared key.
 */
struct sctp_authkey {
	sctp_assoc_t	sca_assoc_id;
	__u16		sca_keynumber;
	__u16		sca_keylength;
	__u8		sca_key[];
};

/*
 * 7.1.21.  Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
 *
 * This option will get or set the active shared key to be used to build
 * the association shared key.
 */

struct sctp_authkeyid {
	sctp_assoc_t	scact_assoc_id;
	__u16		scact_keynumber;
};

/*
 * 7.1.23.  Get or set delayed ack timer (SCTP_DELAYED_SACK)
 *
 * This option will effect the way delayed acks are performed.  This
 * option allows you to get or set the delayed ack time, in
 * milliseconds.  It also allows changing the delayed ack frequency.
 * Changing the frequency to 1 disables the delayed sack algorithm.  If
 * the assoc_id is 0, then this sets or gets the endpoints default
 * values.  If the assoc_id field is non-zero, then the set or get
 * effects the specified association for the one to many model (the
 * assoc_id field is ignored by the one to one model).  Note that if
 * sack_delay or sack_freq are 0 when setting this option, then the
 * current values will remain unchanged.
 */
struct sctp_sack_info {
	sctp_assoc_t	sack_assoc_id;
	uint32_t	sack_delay;
	uint32_t	sack_freq;
};

struct sctp_assoc_value {
    sctp_assoc_t            assoc_id;
    uint32_t                assoc_value;
};

struct sctp_stream_value {
	sctp_assoc_t assoc_id;
	uint16_t stream_id;
	uint16_t stream_value;
};

/*
 * 7.2.2 Peer Address Information
 *
 *   Applications can retrieve information about a specific peer address
 *   of an association, including its reachability state, congestion
 *   window, and retransmission timer values.  This information is
 *   read-only. The following structure is used to access this
 *   information:
 */
struct sctp_paddrinfo {
	sctp_assoc_t		spinfo_assoc_id;
	struct sockaddr_storage	spinfo_address;
	__s32			spinfo_state;
	__u32			spinfo_cwnd;
	__u32			spinfo_srtt;
	__u32			spinfo_rto;
	__u32			spinfo_mtu;
} __attribute__((packed, aligned(4)));

/* Peer addresses's state. */
/* UNKNOWN: Peer address passed by the upper layer in sendmsg or connect[x]
 * calls.
 * UNCONFIRMED: Peer address received in INIT/INIT-ACK address parameters.
 *              Not yet confirmed by a heartbeat and not available for data
 *		transfers.
 * ACTIVE : Peer address confirmed, active and available for data transfers.
 * INACTIVE: Peer address inactive and not available for data transfers.
 */
enum sctp_spinfo_state {
	SCTP_INACTIVE,
	SCTP_PF,
#define	SCTP_POTENTIALLY_FAILED		SCTP_PF
	SCTP_ACTIVE,
	SCTP_UNCONFIRMED,
	SCTP_UNKNOWN = 0xffff  /* Value used for transport state unknown */
};

/*
 * 7.2.1 Association Status (SCTP_STATUS)
 *
 *   Applications can retrieve current status information about an
 *   association, including association state, peer receiver window size,
 *   number of unacked data chunks, and number of data chunks pending
 *   receipt.  This information is read-only.  The following structure is
 *   used to access this information:
 */
struct sctp_status {
	sctp_assoc_t		sstat_assoc_id;
	__s32			sstat_state;
	__u32			sstat_rwnd;
	__u16			sstat_unackdata;
	__u16			sstat_penddata;
	__u16			sstat_instrms;
	__u16			sstat_outstrms;
	__u32			sstat_fragmentation_point;
	struct sctp_paddrinfo	sstat_primary;
};

/*
 * 7.2.3.  Get the list of chunks the peer requires to be authenticated
 *         (SCTP_PEER_AUTH_CHUNKS)
 *
 * This option gets a list of chunks for a specified association that
 * the peer requires to be received authenticated only.
 */
struct sctp_authchunks {
	sctp_assoc_t	gauth_assoc_id;
	__u32		gauth_number_of_chunks;
	uint8_t		gauth_chunks[];
};

/* The broken spelling has been released already in lksctp-tools header,
 * so don't break anyone, now that it's fixed.
 */
#define guth_number_of_chunks	gauth_number_of_chunks

/* Association states.  */
enum sctp_sstat_state {
	SCTP_EMPTY                = 0,
	SCTP_CLOSED               = 1,
	SCTP_COOKIE_WAIT          = 2,
	SCTP_COOKIE_ECHOED        = 3,
	SCTP_ESTABLISHED          = 4,
	SCTP_SHUTDOWN_PENDING     = 5,
	SCTP_SHUTDOWN_SENT        = 6,
	SCTP_SHUTDOWN_RECEIVED    = 7,
	SCTP_SHUTDOWN_ACK_SENT    = 8,
};

/*
 * 8.2.6. Get the Current Identifiers of Associations
 *        (SCTP_GET_ASSOC_ID_LIST)
 *
 * This option gets the current list of SCTP association identifiers of
 * the SCTP associations handled by a one-to-many style socket.
 */
struct sctp_assoc_ids {
	__u32		gaids_number_of_ids;
	sctp_assoc_t	gaids_assoc_id[];
};

/*
 * 8.3, 8.5 get all peer/local addresses in an association.
 * This parameter struct is used by SCTP_GET_PEER_ADDRS and
 * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
 * sctp_getpaddrs() and sctp_getladdrs() API.
 */
struct sctp_getaddrs_old {
	sctp_assoc_t            assoc_id;
	int			addr_num;
	struct sockaddr		*addrs;
};

struct sctp_getaddrs {
	sctp_assoc_t		assoc_id; /*input*/
	__u32			addr_num; /*output*/
	__u8			addrs[0]; /*output, variable size*/
};

/* A socket user request obtained via SCTP_GET_ASSOC_STATS that retrieves
 * association stats. All stats are counts except sas_maxrto and
 * sas_obs_rto_ipaddr. maxrto is the max observed rto + transport since
 * the last call. Will return 0 when RTO was not update since last call
 */
struct sctp_assoc_stats {
	sctp_assoc_t	sas_assoc_id;    /* Input */
					 /* Transport of observed max RTO */
	struct sockaddr_storage sas_obs_rto_ipaddr;
	__u64		sas_maxrto;      /* Maximum Observed RTO for period */
	__u64		sas_isacks;	 /* SACKs received */
	__u64		sas_osacks;	 /* SACKs sent */
	__u64		sas_opackets;	 /* Packets sent */
	__u64		sas_ipackets;	 /* Packets received */
	__u64		sas_rtxchunks;   /* Retransmitted Chunks */
	__u64		sas_outofseqtsns;/* TSN received > next expected */
	__u64		sas_idupchunks;  /* Dups received (ordered+unordered) */
	__u64		sas_gapcnt;      /* Gap Acknowledgements Received */
	__u64		sas_ouodchunks;  /* Unordered data chunks sent */
	__u64		sas_iuodchunks;  /* Unordered data chunks received */
	__u64		sas_oodchunks;	 /* Ordered data chunks sent */
	__u64		sas_iodchunks;	 /* Ordered data chunks received */
	__u64		sas_octrlchunks; /* Control chunks sent */
	__u64		sas_ictrlchunks; /* Control chunks received */
};

/*
 * 8.1 sctp_bindx()
 *
 * The flags parameter is formed from the bitwise OR of zero or more of the
 * following currently defined flags:
 */
#define SCTP_BINDX_ADD_ADDR 0x01
#define SCTP_BINDX_REM_ADDR 0x02

/* This is the structure that is passed as an argument(optval) to
 * getsockopt(SCTP_SOCKOPT_PEELOFF).
 */
typedef struct {
	sctp_assoc_t associd;
	int sd;
} sctp_peeloff_arg_t;

typedef struct {
	sctp_peeloff_arg_t p_arg;
	unsigned flags;
} sctp_peeloff_flags_arg_t;

/*
 *  Peer Address Thresholds socket option
 */
struct sctp_paddrthlds {
	sctp_assoc_t spt_assoc_id;
	struct sockaddr_storage spt_address;
	__u16 spt_pathmaxrxt;
	__u16 spt_pathpfthld;
};

/* Use a new structure with spt_pathcpthld for back compatibility */
struct sctp_paddrthlds_v2 {
	sctp_assoc_t spt_assoc_id;
	struct sockaddr_storage spt_address;
	__u16 spt_pathmaxrxt;
	__u16 spt_pathpfthld;
	__u16 spt_pathcpthld;
};

/*
 * Socket Option for Getting the Association/Stream-Specific PR-SCTP Status
 */
struct sctp_prstatus {
	sctp_assoc_t sprstat_assoc_id;
	__u16 sprstat_sid;
	__u16 sprstat_policy;
	__u64 sprstat_abandoned_unsent;
	__u64 sprstat_abandoned_sent;
};

struct sctp_default_prinfo {
	sctp_assoc_t pr_assoc_id;
	__u32 pr_value;
	__u16 pr_policy;
};

struct sctp_info {
	__u32	sctpi_tag;
	__u32	sctpi_state;
	__u32	sctpi_rwnd;
	__u16	sctpi_unackdata;
	__u16	sctpi_penddata;
	__u16	sctpi_instrms;
	__u16	sctpi_outstrms;
	__u32	sctpi_fragmentation_point;
	__u32	sctpi_inqueue;
	__u32	sctpi_outqueue;
	__u32	sctpi_overall_error;
	__u32	sctpi_max_burst;
	__u32	sctpi_maxseg;
	__u32	sctpi_peer_rwnd;
	__u32	sctpi_peer_tag;
	__u8	sctpi_peer_capable;
	__u8	sctpi_peer_sack;
	__u16	__reserved1;

/* assoc status info */
	__u64	sctpi_isacks;
	__u64	sctpi_osacks;
	__u64	sctpi_opackets;
	__u64	sctpi_ipackets;
	__u64	sctpi_rtxchunks;
	__u64	sctpi_outofseqtsns;
	__u64	sctpi_idupchunks;
	__u64	sctpi_gapcnt;
	__u64	sctpi_ouodchunks;
	__u64	sctpi_iuodchunks;
	__u64	sctpi_oodchunks;
	__u64	sctpi_iodchunks;
	__u64	sctpi_octrlchunks;
	__u64	sctpi_ictrlchunks;

/* primary transport info */
	struct sockaddr_storage	sctpi_p_address;
	__s32	sctpi_p_state;
	__u32	sctpi_p_cwnd;
	__u32	sctpi_p_srtt;
	__u32	sctpi_p_rto;
	__u32	sctpi_p_hbinterval;
	__u32	sctpi_p_pathmaxrxt;
	__u32	sctpi_p_sackdelay;
	__u32	sctpi_p_sackfreq;
	__u32	sctpi_p_ssthresh;
	__u32	sctpi_p_partial_bytes_acked;
	__u32	sctpi_p_flight_size;
	__u16	sctpi_p_error;
	__u16	__reserved2;

/* sctp sock info */
	__u32	sctpi_s_autoclose;
	__u32	sctpi_s_adaptation_ind;
	__u32	sctpi_s_pd_point;
	__u8	sctpi_s_nodelay;
	__u8	sctpi_s_disable_fragments;
	__u8	sctpi_s_v4mapped;
	__u8	sctpi_s_frag_interleave;
	__u32	sctpi_s_type;
	__u32	__reserved3;
};

struct sctp_reset_streams {
	sctp_assoc_t srs_assoc_id;
	uint16_t srs_flags;
	uint16_t srs_number_streams;	/* 0 == ALL */
	uint16_t srs_stream_list[];	/* list if srs_num_streams is not 0 */
};

struct sctp_add_streams {
	sctp_assoc_t sas_assoc_id;
	uint16_t sas_instrms;
	uint16_t sas_outstrms;
};

struct sctp_event {
	sctp_assoc_t se_assoc_id;
	uint16_t se_type;
	uint8_t se_on;
};

struct sctp_udpencaps {
	sctp_assoc_t sue_assoc_id;
	struct sockaddr_storage sue_address;
	uint16_t sue_port;
};

/* SCTP Stream schedulers */
enum sctp_sched_type {
	SCTP_SS_FCFS,
	SCTP_SS_DEFAULT = SCTP_SS_FCFS,
	SCTP_SS_PRIO,
	SCTP_SS_RR,
	SCTP_SS_FC,
	SCTP_SS_WFQ,
	SCTP_SS_MAX = SCTP_SS_WFQ
};

/* Probe Interval socket option */
struct sctp_probeinterval {
	sctp_assoc_t spi_assoc_id;
	struct sockaddr_storage spi_address;
	__u32 spi_interval;
};

#endif /* _SCTP_H */

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