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Name	Size	Permission	Date
9p	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
bluetooth	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
caif	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
iucv	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
mana	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
netfilter	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
netns	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
nfc	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
page_pool	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
phonet	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
sctp	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
tc_act	[ DIR ]	drwxr-xr-x	2026-07-17 06:29
6lowpan.h	10.03 KB	-rw-r--r--	2024-03-10 20:38
Space.h	455 B	-rw-r--r--	2024-03-10 20:38
act_api.h	9.35 KB	-rw-r--r--	2026-07-01 19:48
addrconf.h	14.28 KB	-rw-r--r--	2026-07-01 19:48
af_ieee802154.h	1.19 KB	-rw-r--r--	2024-03-10 20:38
af_rxrpc.h	3.3 KB	-rw-r--r--	2024-03-10 20:38
af_unix.h	3.76 KB	-rw-r--r--	2026-07-01 19:48
af_vsock.h	8.41 KB	-rw-r--r--	2026-07-01 19:48
ah.h	382 B	-rw-r--r--	2024-03-10 20:38
amt.h	8.35 KB	-rw-r--r--	2024-03-10 20:38
arp.h	1.95 KB	-rw-r--r--	2024-03-10 20:38
atmclip.h	1.48 KB	-rw-r--r--	2024-03-10 20:38
ax25.h	14.94 KB	-rw-r--r--	2026-07-01 19:48
ax88796.h	1.43 KB	-rw-r--r--	2024-03-10 20:38
bareudp.h	333 B	-rw-r--r--	2024-03-10 20:38
bond_3ad.h	9.5 KB	-rw-r--r--	2026-07-01 19:48
bond_alb.h	6.1 KB	-rw-r--r--	2024-03-10 20:38
bond_options.h	4.88 KB	-rw-r--r--	2026-07-01 19:48
bonding.h	21.5 KB	-rw-r--r--	2026-07-01 19:48
bpf_sk_storage.h	1.74 KB	-rw-r--r--	2024-03-10 20:38
busy_poll.h	4.28 KB	-rw-r--r--	2026-07-01 19:48
calipso.h	1.55 KB	-rw-r--r--	2024-03-10 20:38
cfg80211-wext.h	1.86 KB	-rw-r--r--	2024-03-10 20:38
cfg80211.h	336.64 KB	-rw-r--r--	2026-07-01 19:48
cfg802154.h	16.68 KB	-rw-r--r--	2026-07-01 19:48
checksum.h	4.98 KB	-rw-r--r--	2026-07-01 19:48
cipso_ipv4.h	7.37 KB	-rw-r--r--	2024-03-10 20:38
cls_cgroup.h	2.04 KB	-rw-r--r--	2026-07-01 19:48
codel.h	5.86 KB	-rw-r--r--	2024-03-10 20:38
codel_impl.h	8.3 KB	-rw-r--r--	2024-03-10 20:38
codel_qdisc.h	2.95 KB	-rw-r--r--	2024-03-10 20:38
compat.h	2.48 KB	-rw-r--r--	2024-03-10 20:38
datalink.h	590 B	-rw-r--r--	2024-03-10 20:38
dcbevent.h	766 B	-rw-r--r--	2024-03-10 20:38
dcbnl.h	4.98 KB	-rw-r--r--	2024-03-10 20:38
devlink.h	70.92 KB	-rw-r--r--	2024-03-10 20:38
dropreason-core.h	14.76 KB	-rw-r--r--	2026-07-01 19:48
dropreason.h	1.36 KB	-rw-r--r--	2024-03-10 20:38
dsa.h	41.09 KB	-rw-r--r--	2026-07-01 19:48
dsa_stubs.h	1.28 KB	-rw-r--r--	2024-03-10 20:38
dsfield.h	1.12 KB	-rw-r--r--	2024-03-10 20:38
dst.h	15.12 KB	-rw-r--r--	2026-07-01 19:48
dst_cache.h	2.96 KB	-rw-r--r--	2024-03-10 20:38
dst_metadata.h	6.34 KB	-rw-r--r--	2024-03-10 20:38
dst_ops.h	2.07 KB	-rw-r--r--	2026-07-01 19:48
erspan.h	9.04 KB	-rw-r--r--	2024-03-10 20:38
esp.h	1.18 KB	-rw-r--r--	2024-03-10 20:38
espintcp.h	966 B	-rw-r--r--	2024-03-10 20:38
ethoc.h	439 B	-rw-r--r--	2024-03-10 20:38
failover.h	1.18 KB	-rw-r--r--	2024-03-10 20:38
fib_notifier.h	1.35 KB	-rw-r--r--	2024-03-10 20:38
fib_rules.h	5.39 KB	-rw-r--r--	2024-03-10 20:38
firewire.h	599 B	-rw-r--r--	2024-03-10 20:38
flow.h	4.96 KB	-rw-r--r--	2024-03-10 20:38
flow_dissector.h	11.95 KB	-rw-r--r--	2024-03-10 20:38
flow_offload.h	17.37 KB	-rw-r--r--	2024-03-10 20:38
fou.h	578 B	-rw-r--r--	2024-03-10 20:38
fq.h	2.41 KB	-rw-r--r--	2024-03-10 20:38
fq_impl.h	7.96 KB	-rw-r--r--	2024-03-10 20:38
garp.h	2.67 KB	-rw-r--r--	2024-03-10 20:38
gen_stats.h	2.99 KB	-rw-r--r--	2024-03-10 20:38
genetlink.h	19.62 KB	-rw-r--r--	2026-07-01 19:48
geneve.h	1.84 KB	-rw-r--r--	2024-03-10 20:38
gre.h	3.29 KB	-rw-r--r--	2024-03-10 20:38
gro.h	13.38 KB	-rw-r--r--	2026-07-01 19:48
gro_cells.h	443 B	-rw-r--r--	2024-03-10 20:38
gso.h	3.2 KB	-rw-r--r--	2024-03-10 20:38
gtp.h	1.46 KB	-rw-r--r--	2024-03-10 20:38
gue.h	3.29 KB	-rw-r--r--	2024-03-10 20:38
handshake.h	1.39 KB	-rw-r--r--	2024-03-10 20:38
hwbm.h	995 B	-rw-r--r--	2024-03-10 20:38
icmp.h	1.87 KB	-rw-r--r--	2024-03-10 20:38
ieee80211_radiotap.h	23.22 KB	-rw-r--r--	2026-07-01 19:48
ieee802154_netdev.h	13.02 KB	-rw-r--r--	2024-03-10 20:38
if_inet6.h	6.6 KB	-rw-r--r--	2024-03-10 20:38
ife.h	1.03 KB	-rw-r--r--	2024-03-10 20:38
inet6_connection_sock.h	794 B	-rw-r--r--	2024-03-10 20:38
inet6_hashtables.h	5.57 KB	-rw-r--r--	2026-07-01 19:48
inet_common.h	2.83 KB	-rw-r--r--	2024-03-10 20:38
inet_connection_sock.h	11.7 KB	-rw-r--r--	2026-07-01 19:48
inet_dscp.h	1.55 KB	-rw-r--r--	2024-03-10 20:38
inet_ecn.h	7.83 KB	-rw-r--r--	2024-03-10 20:38
inet_frag.h	5.25 KB	-rw-r--r--	2026-07-01 19:48
inet_hashtables.h	16.91 KB	-rw-r--r--	2026-07-01 19:48
inet_sock.h	11.36 KB	-rw-r--r--	2026-07-01 19:48
inet_timewait_sock.h	3.71 KB	-rw-r--r--	2026-07-01 19:48
inetpeer.h	3.23 KB	-rw-r--r--	2026-07-01 19:48
ioam6.h	1.24 KB	-rw-r--r--	2026-07-01 19:48
ip.h	23.13 KB	-rw-r--r--	2026-07-01 19:48
ip6_checksum.h	2.3 KB	-rw-r--r--	2024-03-10 20:38
ip6_fib.h	17.6 KB	-rw-r--r--	2026-07-01 19:48
ip6_route.h	10.18 KB	-rw-r--r--	2026-07-01 19:48
ip6_tunnel.h	5.31 KB	-rw-r--r--	2026-07-01 19:48
ip_fib.h	16.13 KB	-rw-r--r--	2026-07-01 19:48
ip_tunnels.h	16.89 KB	-rw-r--r--	2026-07-01 19:48
ip_vs.h	53.83 KB	-rw-r--r--	2024-03-10 20:38
ipcomp.h	737 B	-rw-r--r--	2024-03-10 20:38
ipconfig.h	837 B	-rw-r--r--	2024-03-10 20:38
ipv6.h	37.62 KB	-rw-r--r--	2026-07-01 19:48
ipv6_frag.h	3.38 KB	-rw-r--r--	2024-03-10 20:38
ipv6_stubs.h	3.75 KB	-rw-r--r--	2026-07-01 19:48
iw_handler.h	20.66 KB	-rw-r--r--	2024-03-10 20:38
kcm.h	4.84 KB	-rw-r--r--	2026-07-01 19:48
l3mdev.h	7.03 KB	-rw-r--r--	2026-07-01 19:48
lag.h	409 B	-rw-r--r--	2024-03-10 20:38
lapb.h	4.82 KB	-rw-r--r--	2026-07-01 19:48
lib80211.h	3.92 KB	-rw-r--r--	2024-03-10 20:38
llc.h	4.41 KB	-rw-r--r--	2024-03-10 20:38
llc_c_ac.h	9.32 KB	-rw-r--r--	2024-03-10 20:38
llc_c_ev.h	10.61 KB	-rw-r--r--	2024-03-10 20:38
llc_c_st.h	1.77 KB	-rw-r--r--	2024-03-10 20:38
llc_conn.h	4.11 KB	-rw-r--r--	2024-03-10 20:38
llc_if.h	2.17 KB	-rw-r--r--	2024-03-10 20:38
llc_pdu.h	14.46 KB	-rw-r--r--	2024-03-10 20:38
llc_s_ac.h	1.59 KB	-rw-r--r--	2024-03-10 20:38
llc_s_ev.h	2.22 KB	-rw-r--r--	2024-03-10 20:38
llc_s_st.h	1.03 KB	-rw-r--r--	2024-03-10 20:38
llc_sap.h	1.08 KB	-rw-r--r--	2024-03-10 20:38
lwtunnel.h	6.69 KB	-rw-r--r--	2026-07-01 19:48
mac80211.h	293.31 KB	-rw-r--r--	2026-07-01 19:48
mac802154.h	14.88 KB	-rw-r--r--	2024-03-10 20:38
macsec.h	10.53 KB	-rw-r--r--	2026-07-01 19:48
mctp.h	8.1 KB	-rw-r--r--	2026-07-01 19:48
mctpdevice.h	1.26 KB	-rw-r--r--	2024-03-10 20:38
mip6.h	1016 B	-rw-r--r--	2024-03-10 20:38
mld.h	2.85 KB	-rw-r--r--	2024-03-10 20:38
mpls.h	943 B	-rw-r--r--	2024-03-10 20:38
mpls_iptunnel.h	481 B	-rw-r--r--	2024-03-10 20:38
mptcp.h	7.41 KB	-rw-r--r--	2024-03-10 20:38
mrp.h	3.13 KB	-rw-r--r--	2024-03-10 20:38
ncsi.h	1.94 KB	-rw-r--r--	2024-03-10 20:38
ndisc.h	14.64 KB	-rw-r--r--	2024-03-10 20:38
neighbour.h	16.55 KB	-rw-r--r--	2026-07-01 19:48
net_debug.h	5.08 KB	-rw-r--r--	2026-07-01 19:48
net_failover.h	1023 B	-rw-r--r--	2024-03-10 20:38
net_namespace.h	14.36 KB	-rw-r--r--	2026-07-01 19:48
net_ratelimit.h	220 B	-rw-r--r--	2024-03-10 20:38
net_trackers.h	424 B	-rw-r--r--	2024-03-10 20:38
netdev_queues.h	5.75 KB	-rw-r--r--	2024-03-10 20:38
netdev_rx_queue.h	1.32 KB	-rw-r--r--	2024-03-10 20:38
netevent.h	1.04 KB	-rw-r--r--	2024-03-10 20:38
netkit.h	1.16 KB	-rw-r--r--	2024-03-10 20:38
netlabel.h	20.15 KB	-rw-r--r--	2026-07-01 19:48
netlink.h	64.18 KB	-rw-r--r--	2024-03-10 20:38
netprio_cgroup.h	1.02 KB	-rw-r--r--	2024-03-10 20:38
netrom.h	7.73 KB	-rw-r--r--	2024-03-10 20:38
nexthop.h	11.91 KB	-rw-r--r--	2024-03-10 20:38
nl802154.h	16.04 KB	-rw-r--r--	2024-03-10 20:38
nsh.h	12.3 KB	-rw-r--r--	2024-03-10 20:38
p8022.h	403 B	-rw-r--r--	2024-03-10 20:38
pie.h	3.61 KB	-rw-r--r--	2026-07-01 19:48
ping.h	2.66 KB	-rw-r--r--	2024-03-10 20:38
pkt_cls.h	25.52 KB	-rw-r--r--	2026-07-01 19:48
pkt_sched.h	7.74 KB	-rw-r--r--	2026-07-01 19:48
pptp.h	604 B	-rw-r--r--	2024-03-10 20:38
protocol.h	3.81 KB	-rw-r--r--	2024-03-10 20:38
psample.h	1.06 KB	-rw-r--r--	2024-03-10 20:38
psnap.h	430 B	-rw-r--r--	2024-03-10 20:38
raw.h	2.46 KB	-rw-r--r--	2024-03-10 20:38
rawv6.h	862 B	-rw-r--r--	2024-03-10 20:38
red.h	11.33 KB	-rw-r--r--	2024-03-10 20:38
regulatory.h	9.96 KB	-rw-r--r--	2024-03-10 20:38
request_sock.h	6.5 KB	-rw-r--r--	2024-03-10 20:38
rose.h	8.06 KB	-rw-r--r--	2026-07-01 19:48
route.h	11.32 KB	-rw-r--r--	2026-07-01 19:48
rpl.h	749 B	-rw-r--r--	2024-03-10 20:38
rsi_91x.h	1.67 KB	-rw-r--r--	2024-03-10 20:38
rtnetlink.h	7.58 KB	-rw-r--r--	2026-07-01 19:48
rtnh.h	859 B	-rw-r--r--	2024-03-10 20:38
sch_generic.h	35.08 KB	-rw-r--r--	2026-07-01 19:48
scm.h	5.36 KB	-rw-r--r--	2026-07-01 19:48
secure_seq.h	868 B	-rw-r--r--	2024-03-10 20:38
seg6.h	2.18 KB	-rw-r--r--	2024-03-10 20:38
seg6_hmac.h	1.44 KB	-rw-r--r--	2024-03-10 20:38
seg6_local.h	644 B	-rw-r--r--	2024-03-10 20:38
selftests.h	582 B	-rw-r--r--	2024-03-10 20:38
slhc_vj.h	6.67 KB	-rw-r--r--	2024-03-10 20:38
smc.h	2.5 KB	-rw-r--r--	2026-07-01 19:48
snmp.h	5.14 KB	-rw-r--r--	2024-03-10 20:38
sock.h	85.78 KB	-rw-r--r--	2026-07-01 19:48
sock_reuseport.h	1.83 KB	-rw-r--r--	2024-03-10 20:38
stp.h	412 B	-rw-r--r--	2024-03-10 20:38
strparser.h	4.34 KB	-rw-r--r--	2026-07-01 19:48
switchdev.h	15.1 KB	-rw-r--r--	2024-03-10 20:38
tc_wrapper.h	6.29 KB	-rw-r--r--	2026-07-01 19:48
tcp.h	85.12 KB	-rw-r--r--	2026-07-01 19:48
tcp_ao.h	12.08 KB	-rw-r--r--	2026-07-01 19:48
tcp_states.h	1.3 KB	-rw-r--r--	2024-03-10 20:38
tcx.h	4.3 KB	-rw-r--r--	2026-07-01 19:48
timewait_sock.h	925 B	-rw-r--r--	2024-03-10 20:38
tipc.h	2.35 KB	-rw-r--r--	2024-03-10 20:38
tls.h	13.28 KB	-rw-r--r--	2026-07-01 19:48
tls_prot.h	1.84 KB	-rw-r--r--	2024-03-10 20:38
tls_toe.h	2.94 KB	-rw-r--r--	2024-03-10 20:38
transp_v6.h	1.88 KB	-rw-r--r--	2024-03-10 20:38
tso.h	721 B	-rw-r--r--	2024-03-10 20:38
tun_proto.h	1015 B	-rw-r--r--	2024-03-10 20:38
udp.h	15.88 KB	-rw-r--r--	2026-07-01 19:48
udp_tunnel.h	12.49 KB	-rw-r--r--	2026-07-01 19:48
udplite.h	2.3 KB	-rw-r--r--	2024-03-10 20:38
vsock_addr.h	662 B	-rw-r--r--	2024-03-10 20:38
vxlan.h	15.83 KB	-rw-r--r--	2026-07-01 19:48
wext.h	1.47 KB	-rw-r--r--	2024-03-10 20:38
x25.h	9.46 KB	-rw-r--r--	2024-03-10 20:38
x25device.h	387 B	-rw-r--r--	2024-03-10 20:38
xdp.h	16.93 KB	-rw-r--r--	2026-07-01 19:48
xdp_priv.h	427 B	-rw-r--r--	2024-03-10 20:38
xdp_sock.h	6.3 KB	-rw-r--r--	2026-07-01 19:48
xdp_sock_drv.h	10.15 KB	-rw-r--r--	2026-07-01 19:48
xfrm.h	58.29 KB	-rw-r--r--	2026-07-01 19:48
xsk_buff_pool.h	7.09 KB	-rw-r--r--	2026-07-01 19:48

Rename

/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _TCP_AO_H
#define _TCP_AO_H

#define TCP_AO_KEY_ALIGN	1
#define __tcp_ao_key_align __aligned(TCP_AO_KEY_ALIGN)

union tcp_ao_addr {
	struct in_addr  a4;
#if IS_ENABLED(CONFIG_IPV6)
	struct in6_addr	a6;
#endif
};

struct tcp_ao_hdr {
	u8	kind;
	u8	length;
	u8	keyid;
	u8	rnext_keyid;
};

struct tcp_ao_counters {
	atomic64_t	pkt_good;
	atomic64_t	pkt_bad;
	atomic64_t	key_not_found;
	atomic64_t	ao_required;
	atomic64_t	dropped_icmp;
};

struct tcp_ao_key {
	struct hlist_node	node;
	union tcp_ao_addr	addr;
	u8			key[TCP_AO_MAXKEYLEN] __tcp_ao_key_align;
	unsigned int		tcp_sigpool_id;
	unsigned int		digest_size;
	int			l3index;
	u8			prefixlen;
	u8			family;
	u8			keylen;
	u8			keyflags;
	u8			sndid;
	u8			rcvid;
	u8			maclen;
	struct rcu_head		rcu;
	atomic64_t		pkt_good;
	atomic64_t		pkt_bad;
	u8			traffic_keys[];
};

static inline u8 *rcv_other_key(struct tcp_ao_key *key)
{
	return key->traffic_keys;
}

static inline u8 *snd_other_key(struct tcp_ao_key *key)
{
	return key->traffic_keys + key->digest_size;
}

static inline int tcp_ao_maclen(const struct tcp_ao_key *key)
{
	return key->maclen;
}

/* Use tcp_ao_len_aligned() for TCP header calculations */
static inline int tcp_ao_len(const struct tcp_ao_key *key)
{
	return tcp_ao_maclen(key) + sizeof(struct tcp_ao_hdr);
}

static inline int tcp_ao_len_aligned(const struct tcp_ao_key *key)
{
	return round_up(tcp_ao_len(key), 4);
}

static inline unsigned int tcp_ao_digest_size(struct tcp_ao_key *key)
{
	return key->digest_size;
}

static inline int tcp_ao_sizeof_key(const struct tcp_ao_key *key)
{
	return sizeof(struct tcp_ao_key) + (key->digest_size << 1);
}

struct tcp_ao_info {
	/* List of tcp_ao_key's */
	struct hlist_head	head;
	/* current_key and rnext_key are maintained on sockets
	 * in TCP_AO_ESTABLISHED states.
	 * Their purpose is to cache keys on established connections,
	 * saving needless lookups. Never dereference any of them from
	 * listen sockets.
	 * ::current_key may change in RX to the key that was requested by
	 * the peer, please use READ_ONCE()/WRITE_ONCE() in order to avoid
	 * load/store tearing.
	 * Do the same for ::rnext_key, if you don't hold socket lock
	 * (it's changed only by userspace request in setsockopt()).
	 */
	struct tcp_ao_key	*current_key;
	struct tcp_ao_key	*rnext_key;
	struct tcp_ao_counters	counters;
	u32			ao_required	:1,
				accept_icmps	:1,
				__unused	:30;
	__be32			lisn;
	__be32			risn;
	/* Sequence Number Extension (SNE) are upper 4 bytes for SEQ,
	 * that protect TCP-AO connection from replayed old TCP segments.
	 * See RFC5925 (6.2).
	 * In order to get correct SNE, there's a helper tcp_ao_compute_sne().
	 * It needs SEQ basis to understand whereabouts are lower SEQ numbers.
	 * According to that basis vector, it can provide incremented SNE
	 * when SEQ rolls over or provide decremented SNE when there's
	 * a retransmitted segment from before-rolling over.
	 * - for request sockets such basis is rcv_isn/snt_isn, which seems
	 *   good enough as it's unexpected to receive 4 Gbytes on reqsk.
	 * - for full sockets the basis is rcv_nxt/snd_una. snd_una is
	 *   taken instead of snd_nxt as currently it's easier to track
	 *   in tcp_snd_una_update(), rather than updating SNE in all
	 *   WRITE_ONCE(tp->snd_nxt, ...)
	 * - for time-wait sockets the basis is tw_rcv_nxt/tw_snd_nxt.
	 *   tw_snd_nxt is not expected to change, while tw_rcv_nxt may.
	 */
	u32			snd_sne;
	u32			rcv_sne;
	refcount_t		refcnt;		/* Protects twsk destruction */
	struct rcu_head		rcu;
};

#ifdef CONFIG_TCP_MD5SIG
#include <linux/jump_label.h>
extern struct static_key_false_deferred tcp_md5_needed;
#define static_branch_tcp_md5()	static_branch_unlikely(&tcp_md5_needed.key)
#else
#define static_branch_tcp_md5()	false
#endif
#ifdef CONFIG_TCP_AO
/* TCP-AO structures and functions */
#include <linux/jump_label.h>
extern struct static_key_false_deferred tcp_ao_needed;
#define static_branch_tcp_ao()	static_branch_unlikely(&tcp_ao_needed.key)
#else
#define static_branch_tcp_ao()	false
#endif

static inline bool tcp_hash_should_produce_warnings(void)
{
	return static_branch_tcp_md5() || static_branch_tcp_ao();
}

#define tcp_hash_fail(msg, family, skb, fmt, ...)			\
do {									\
	const struct tcphdr *th = tcp_hdr(skb);				\
	char hdr_flags[6];						\
	char *f = hdr_flags;						\
									\
	if (!tcp_hash_should_produce_warnings())			\
		break;							\
	if (th->fin)							\
		*f++ = 'F';						\
	if (th->syn)							\
		*f++ = 'S';						\
	if (th->rst)							\
		*f++ = 'R';						\
	if (th->psh)							\
		*f++ = 'P';						\
	if (th->ack)							\
		*f++ = '.';						\
	*f = 0;								\
	if ((family) == AF_INET) {					\
		net_info_ratelimited("%s for %pI4.%d->%pI4.%d [%s] " fmt "\n", \
				msg, &ip_hdr(skb)->saddr, ntohs(th->source), \
				&ip_hdr(skb)->daddr, ntohs(th->dest),	\
				hdr_flags, ##__VA_ARGS__);		\
	} else {							\
		net_info_ratelimited("%s for [%pI6c].%d->[%pI6c].%d [%s]" fmt "\n", \
				msg, &ipv6_hdr(skb)->saddr, ntohs(th->source), \
				&ipv6_hdr(skb)->daddr, ntohs(th->dest),	\
				hdr_flags, ##__VA_ARGS__);		\
	}								\
} while (0)

#ifdef CONFIG_TCP_AO
/* TCP-AO structures and functions */
struct tcp4_ao_context {
	__be32		saddr;
	__be32		daddr;
	__be16		sport;
	__be16		dport;
	__be32		sisn;
	__be32		disn;
};

struct tcp6_ao_context {
	struct in6_addr	saddr;
	struct in6_addr	daddr;
	__be16		sport;
	__be16		dport;
	__be32		sisn;
	__be32		disn;
};

struct tcp_sigpool;
/* Established states are fast-path and there always is current_key/rnext_key */
#define TCP_AO_ESTABLISHED (TCPF_ESTABLISHED | TCPF_FIN_WAIT1 | TCPF_FIN_WAIT2 | \
			    TCPF_CLOSE_WAIT | TCPF_LAST_ACK | TCPF_CLOSING)

int tcp_ao_transmit_skb(struct sock *sk, struct sk_buff *skb,
			struct tcp_ao_key *key, struct tcphdr *th,
			__u8 *hash_location);
int tcp_ao_hash_skb(unsigned short int family,
		    char *ao_hash, struct tcp_ao_key *key,
		    const struct sock *sk, const struct sk_buff *skb,
		    const u8 *tkey, int hash_offset, u32 sne);
int tcp_parse_ao(struct sock *sk, int cmd, unsigned short int family,
		 sockptr_t optval, int optlen);
struct tcp_ao_key *tcp_ao_established_key(const struct sock *sk,
					  struct tcp_ao_info *ao,
					  int sndid, int rcvid);
int tcp_ao_copy_all_matching(const struct sock *sk, struct sock *newsk,
			     struct request_sock *req, struct sk_buff *skb,
			     int family);
int tcp_ao_calc_traffic_key(struct tcp_ao_key *mkt, u8 *key, void *ctx,
			    unsigned int len, struct tcp_sigpool *hp);
void tcp_ao_destroy_sock(struct sock *sk, bool twsk);
void tcp_ao_time_wait(struct tcp_timewait_sock *tcptw, struct tcp_sock *tp);
bool tcp_ao_ignore_icmp(const struct sock *sk, int family, int type, int code);
int tcp_ao_get_mkts(struct sock *sk, sockptr_t optval, sockptr_t optlen);
int tcp_ao_get_sock_info(struct sock *sk, sockptr_t optval, sockptr_t optlen);
int tcp_ao_get_repair(struct sock *sk, sockptr_t optval, sockptr_t optlen);
int tcp_ao_set_repair(struct sock *sk, sockptr_t optval, unsigned int optlen);
enum skb_drop_reason tcp_inbound_ao_hash(struct sock *sk,
			const struct sk_buff *skb, unsigned short int family,
			const struct request_sock *req, int l3index,
			const struct tcp_ao_hdr *aoh);
u32 tcp_ao_compute_sne(u32 next_sne, u32 next_seq, u32 seq);
struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk, int l3index,
				    const union tcp_ao_addr *addr,
				    int family, int sndid, int rcvid);
int tcp_ao_hash_hdr(unsigned short family, char *ao_hash,
		    struct tcp_ao_key *key, const u8 *tkey,
		    const union tcp_ao_addr *daddr,
		    const union tcp_ao_addr *saddr,
		    const struct tcphdr *th, u32 sne);
int tcp_ao_prepare_reset(const struct sock *sk, struct sk_buff *skb,
			 const struct tcp_ao_hdr *aoh, int l3index, u32 seq,
			 struct tcp_ao_key **key, char **traffic_key,
			 bool *allocated_traffic_key, u8 *keyid, u32 *sne);

/* ipv4 specific functions */
int tcp_v4_parse_ao(struct sock *sk, int cmd, sockptr_t optval, int optlen);
struct tcp_ao_key *tcp_v4_ao_lookup(const struct sock *sk, struct sock *addr_sk,
				    int sndid, int rcvid);
int tcp_v4_ao_synack_hash(char *ao_hash, struct tcp_ao_key *mkt,
			  struct request_sock *req, const struct sk_buff *skb,
			  int hash_offset, u32 sne);
int tcp_v4_ao_calc_key_sk(struct tcp_ao_key *mkt, u8 *key,
			  const struct sock *sk,
			  __be32 sisn, __be32 disn, bool send);
int tcp_v4_ao_calc_key_rsk(struct tcp_ao_key *mkt, u8 *key,
			   struct request_sock *req);
struct tcp_ao_key *tcp_v4_ao_lookup_rsk(const struct sock *sk,
					struct request_sock *req,
					int sndid, int rcvid);
int tcp_v4_ao_hash_skb(char *ao_hash, struct tcp_ao_key *key,
		       const struct sock *sk, const struct sk_buff *skb,
		       const u8 *tkey, int hash_offset, u32 sne);
/* ipv6 specific functions */
int tcp_v6_ao_hash_pseudoheader(struct tcp_sigpool *hp,
				const struct in6_addr *daddr,
				const struct in6_addr *saddr, int nbytes);
int tcp_v6_ao_calc_key_skb(struct tcp_ao_key *mkt, u8 *key,
			   const struct sk_buff *skb, __be32 sisn, __be32 disn);
int tcp_v6_ao_calc_key_sk(struct tcp_ao_key *mkt, u8 *key,
			  const struct sock *sk, __be32 sisn,
			  __be32 disn, bool send);
int tcp_v6_ao_calc_key_rsk(struct tcp_ao_key *mkt, u8 *key,
			   struct request_sock *req);
struct tcp_ao_key *tcp_v6_ao_lookup(const struct sock *sk,
				    struct sock *addr_sk, int sndid, int rcvid);
struct tcp_ao_key *tcp_v6_ao_lookup_rsk(const struct sock *sk,
					struct request_sock *req,
					int sndid, int rcvid);
int tcp_v6_ao_hash_skb(char *ao_hash, struct tcp_ao_key *key,
		       const struct sock *sk, const struct sk_buff *skb,
		       const u8 *tkey, int hash_offset, u32 sne);
int tcp_v6_parse_ao(struct sock *sk, int cmd, sockptr_t optval, int optlen);
int tcp_v6_ao_synack_hash(char *ao_hash, struct tcp_ao_key *ao_key,
			  struct request_sock *req, const struct sk_buff *skb,
			  int hash_offset, u32 sne);
void tcp_ao_established(struct sock *sk);
void tcp_ao_finish_connect(struct sock *sk, struct sk_buff *skb);
void tcp_ao_connect_init(struct sock *sk);
void tcp_ao_syncookie(struct sock *sk, const struct sk_buff *skb,
		      struct request_sock *req, unsigned short int family);
#else /* CONFIG_TCP_AO */

static inline int tcp_ao_transmit_skb(struct sock *sk, struct sk_buff *skb,
				      struct tcp_ao_key *key, struct tcphdr *th,
				      __u8 *hash_location)
{
	return 0;
}

static inline void tcp_ao_syncookie(struct sock *sk, const struct sk_buff *skb,
				    struct request_sock *req, unsigned short int family)
{
}

static inline bool tcp_ao_ignore_icmp(const struct sock *sk, int family,
				      int type, int code)
{
	return false;
}

static inline enum skb_drop_reason tcp_inbound_ao_hash(struct sock *sk,
		const struct sk_buff *skb, unsigned short int family,
		const struct request_sock *req, int l3index,
		const struct tcp_ao_hdr *aoh)
{
	return SKB_NOT_DROPPED_YET;
}

static inline struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk,
		int l3index, const union tcp_ao_addr *addr,
		int family, int sndid, int rcvid)
{
	return NULL;
}

static inline void tcp_ao_destroy_sock(struct sock *sk, bool twsk)
{
}

static inline void tcp_ao_established(struct sock *sk)
{
}

static inline void tcp_ao_finish_connect(struct sock *sk, struct sk_buff *skb)
{
}

static inline void tcp_ao_time_wait(struct tcp_timewait_sock *tcptw,
				    struct tcp_sock *tp)
{
}

static inline void tcp_ao_connect_init(struct sock *sk)
{
}

static inline int tcp_ao_get_mkts(struct sock *sk, sockptr_t optval, sockptr_t optlen)
{
	return -ENOPROTOOPT;
}

static inline int tcp_ao_get_sock_info(struct sock *sk, sockptr_t optval, sockptr_t optlen)
{
	return -ENOPROTOOPT;
}

static inline int tcp_ao_get_repair(struct sock *sk,
				    sockptr_t optval, sockptr_t optlen)
{
	return -ENOPROTOOPT;
}

static inline int tcp_ao_set_repair(struct sock *sk,
				    sockptr_t optval, unsigned int optlen)
{
	return -ENOPROTOOPT;
}
#endif

#if defined(CONFIG_TCP_MD5SIG) || defined(CONFIG_TCP_AO)
int tcp_do_parse_auth_options(const struct tcphdr *th,
			      const u8 **md5_hash, const u8 **ao_hash);
#else
static inline int tcp_do_parse_auth_options(const struct tcphdr *th,
		const u8 **md5_hash, const u8 **ao_hash)
{
	*md5_hash = NULL;
	*ao_hash = NULL;
	return 0;
}
#endif

#endif /* _TCP_AO_H */