Gecko [ thecigaretteboxes.com ]

Name	Size	Permission
9p	[ DIR ]	drwxr-xr-x
bluetooth	[ DIR ]	drwxr-xr-x
caif	[ DIR ]	drwxr-xr-x
iucv	[ DIR ]	drwxr-xr-x
netfilter	[ DIR ]	drwxr-xr-x
netns	[ DIR ]	drwxr-xr-x
nfc	[ DIR ]	drwxr-xr-x
phonet	[ DIR ]	drwxr-xr-x
sctp	[ DIR ]	drwxr-xr-x
tc_act	[ DIR ]	drwxr-xr-x
6lowpan.h	10.03 KB	-rw-r--r--
Space.h	1.07 KB	-rw-r--r--
act_api.h	6.98 KB	-rw-r--r--
addrconf.h	14.1 KB	-rw-r--r--
af_ieee802154.h	1.19 KB	-rw-r--r--
af_rxrpc.h	2.65 KB	-rw-r--r--
af_unix.h	2.59 KB	-rw-r--r--
af_vsock.h	6.8 KB	-rw-r--r--
ah.h	382 B	-rw-r--r--
arp.h	2.09 KB	-rw-r--r--
atmclip.h	1.48 KB	-rw-r--r--
ax25.h	15.08 KB	-rw-r--r--
ax88796.h	1.31 KB	-rw-r--r--
bond_3ad.h	9.44 KB	-rw-r--r--
bond_alb.h	5.92 KB	-rw-r--r--
bond_options.h	3.74 KB	-rw-r--r--
bonding.h	19.63 KB	-rw-r--r--
bpf_sk_storage.h	558 B	-rw-r--r--
busy_poll.h	3.23 KB	-rw-r--r--
calipso.h	1.55 KB	-rw-r--r--
cfg80211-wext.h	1.81 KB	-rw-r--r--
cfg80211.h	265.02 KB	-rw-r--r--
cfg802154.h	10.51 KB	-rw-r--r--
checksum.h	4.67 KB	-rw-r--r--
cipso_ipv4.h	7.61 KB	-rw-r--r--
cls_cgroup.h	1.94 KB	-rw-r--r--
codel.h	5.65 KB	-rw-r--r--
codel_impl.h	7.98 KB	-rw-r--r--
codel_qdisc.h	2.9 KB	-rw-r--r--
compat.h	1.44 KB	-rw-r--r--
datalink.h	619 B	-rw-r--r--
dcbevent.h	742 B	-rw-r--r--
dcbnl.h	4.22 KB	-rw-r--r--
devlink.h	33.11 KB	-rw-r--r--
drop_monitor.h	788 B	-rw-r--r--
dsa.h	19.45 KB	-rw-r--r--
dsfield.h	1.11 KB	-rw-r--r--
dst.h	13.23 KB	-rw-r--r--
dst_cache.h	2.54 KB	-rw-r--r--
dst_metadata.h	5.39 KB	-rw-r--r--
dst_ops.h	2.08 KB	-rw-r--r--
erspan.h	8.96 KB	-rw-r--r--
esp.h	877 B	-rw-r--r--
ethoc.h	391 B	-rw-r--r--
failover.h	1.15 KB	-rw-r--r--
fib_notifier.h	1.28 KB	-rw-r--r--
fib_rules.h	5.48 KB	-rw-r--r--
firewire.h	636 B	-rw-r--r--
flow.h	5.92 KB	-rw-r--r--
flow_dissector.h	8.99 KB	-rw-r--r--
flow_offload.h	10.72 KB	-rw-r--r--
fou.h	549 B	-rw-r--r--
fq.h	2.7 KB	-rw-r--r--
fq_impl.h	7 KB	-rw-r--r--
garp.h	2.62 KB	-rw-r--r--
gen_stats.h	2.7 KB	-rw-r--r--
genetlink.h	12.2 KB	-rw-r--r--
geneve.h	1.85 KB	-rw-r--r--
gre.h	3.3 KB	-rw-r--r--
gro_cells.h	443 B	-rw-r--r--
gtp.h	633 B	-rw-r--r--
gue.h	3.23 KB	-rw-r--r--
hwbm.h	969 B	-rw-r--r--
icmp.h	1.81 KB	-rw-r--r--
ieee80211_radiotap.h	13.04 KB	-rw-r--r--
ieee802154_netdev.h	9.86 KB	-rw-r--r--
if_inet6.h	6.19 KB	-rw-r--r--
ife.h	1.03 KB	-rw-r--r--
ila.h	291 B	-rw-r--r--
inet6_connection_sock.h	765 B	-rw-r--r--
inet6_hashtables.h	3.45 KB	-rw-r--r--
inet_common.h	2.27 KB	-rw-r--r--
inet_connection_sock.h	11.41 KB	-rw-r--r--
inet_ecn.h	7.5 KB	-rw-r--r--
inet_frag.h	4.9 KB	-rw-r--r--
inet_hashtables.h	13.77 KB	-rw-r--r--
inet_sock.h	9.48 KB	-rw-r--r--
inet_timewait_sock.h	3.65 KB	-rw-r--r--
inetpeer.h	3.29 KB	-rw-r--r--
ip.h	21.92 KB	-rw-r--r--
ip6_checksum.h	2.69 KB	-rw-r--r--
ip6_fib.h	13.23 KB	-rw-r--r--
ip6_route.h	9.89 KB	-rw-r--r--
ip6_tunnel.h	4.98 KB	-rw-r--r--
ip_fib.h	13.57 KB	-rw-r--r--
ip_tunnels.h	14.69 KB	-rw-r--r--
ip_vs.h	48.06 KB	-rw-r--r--
ipcomp.h	659 B	-rw-r--r--
ipconfig.h	811 B	-rw-r--r--
ipv6.h	32.75 KB	-rw-r--r--
ipv6_frag.h	2.65 KB	-rw-r--r--
ipv6_stubs.h	2.74 KB	-rw-r--r--
ipx.h	4.28 KB	-rw-r--r--
iw_handler.h	20.91 KB	-rw-r--r--
kcm.h	4.84 KB	-rw-r--r--
l3mdev.h	6.14 KB	-rw-r--r--
lag.h	409 B	-rw-r--r--
lapb.h	4.76 KB	-rw-r--r--
lib80211.h	3.92 KB	-rw-r--r--
llc.h	4.41 KB	-rw-r--r--
llc_c_ac.h	9.31 KB	-rw-r--r--
llc_c_ev.h	10.68 KB	-rw-r--r--
llc_c_st.h	1.72 KB	-rw-r--r--
llc_conn.h	4.06 KB	-rw-r--r--
llc_if.h	2.16 KB	-rw-r--r--
llc_pdu.h	14.35 KB	-rw-r--r--
llc_s_ac.h	1.55 KB	-rw-r--r--
llc_s_ev.h	2.2 KB	-rw-r--r--
llc_s_st.h	947 B	-rw-r--r--
llc_sap.h	1.08 KB	-rw-r--r--
lwtunnel.h	6.54 KB	-rw-r--r--
mac80211.h	251.74 KB	-rw-r--r--
mac802154.h	14.88 KB	-rw-r--r--
mip6.h	1017 B	-rw-r--r--
mld.h	2.8 KB	-rw-r--r--
mpls.h	535 B	-rw-r--r--
mpls_iptunnel.h	430 B	-rw-r--r--
mrp.h	3.05 KB	-rw-r--r--
ncsi.h	1.92 KB	-rw-r--r--
ndisc.h	14.77 KB	-rw-r--r--
neighbour.h	15.75 KB	-rw-r--r--
net_failover.h	1023 B	-rw-r--r--
net_namespace.h	12.13 KB	-rw-r--r--
net_ratelimit.h	220 B	-rw-r--r--
netevent.h	1.02 KB	-rw-r--r--
netlabel.h	20.14 KB	-rw-r--r--
netlink.h	56.77 KB	-rw-r--r--
netprio_cgroup.h	1.03 KB	-rw-r--r--
netrom.h	7.71 KB	-rw-r--r--
nexthop.h	7.58 KB	-rw-r--r--
nl802154.h	12.09 KB	-rw-r--r--
nsh.h	12.31 KB	-rw-r--r--
p8022.h	447 B	-rw-r--r--
page_pool.h	6.46 KB	-rw-r--r--
ping.h	2.9 KB	-rw-r--r--
pkt_cls.h	19.61 KB	-rw-r--r--
pkt_sched.h	4.61 KB	-rw-r--r--
pptp.h	557 B	-rw-r--r--
protocol.h	3.82 KB	-rw-r--r--
psample.h	888 B	-rw-r--r--
psnap.h	351 B	-rw-r--r--
raw.h	2.09 KB	-rw-r--r--
rawv6.h	854 B	-rw-r--r--
red.h	10.45 KB	-rw-r--r--
regulatory.h	10.89 KB	-rw-r--r--
request_sock.h	6.37 KB	-rw-r--r--
rose.h	7.62 KB	-rw-r--r--
route.h	10.87 KB	-rw-r--r--
rsi_91x.h	1.67 KB	-rw-r--r--
rtnetlink.h	6.28 KB	-rw-r--r--
rtnh.h	859 B	-rw-r--r--
sch_generic.h	33.05 KB	-rw-r--r--
scm.h	3.75 KB	-rw-r--r--
secure_seq.h	855 B	-rw-r--r--
seg6.h	1.57 KB	-rw-r--r--
seg6_hmac.h	1.44 KB	-rw-r--r--
seg6_local.h	644 B	-rw-r--r--
slhc_vj.h	6.67 KB	-rw-r--r--
smc.h	2.18 KB	-rw-r--r--
snmp.h	5.02 KB	-rw-r--r--
sock.h	75.57 KB	-rw-r--r--
sock_reuseport.h	1.58 KB	-rw-r--r--
stp.h	383 B	-rw-r--r--
strparser.h	4.03 KB	-rw-r--r--
switchdev.h	8 KB	-rw-r--r--
tcp.h	70.97 KB	-rw-r--r--
tcp_states.h	1.2 KB	-rw-r--r--
timewait_sock.h	925 B	-rw-r--r--
tipc.h	2.35 KB	-rw-r--r--
tls.h	19.86 KB	-rw-r--r--
transp_v6.h	2.05 KB	-rw-r--r--
tso.h	515 B	-rw-r--r--
tun_proto.h	988 B	-rw-r--r--
udp.h	14.71 KB	-rw-r--r--
udp_tunnel.h	5.37 KB	-rw-r--r--
udplite.h	3.67 KB	-rw-r--r--
vsock_addr.h	657 B	-rw-r--r--
vxlan.h	13.45 KB	-rw-r--r--
wext.h	1.47 KB	-rw-r--r--
wimax.h	19.36 KB	-rw-r--r--
x25.h	9.43 KB	-rw-r--r--
x25device.h	387 B	-rw-r--r--
xdp.h	5.32 KB	-rw-r--r--
xdp_priv.h	446 B	-rw-r--r--
xdp_sock.h	8.26 KB	-rw-r--r--
xfrm.h	53.07 KB	-rw-r--r--

Code Editor : tls.h

/*
 * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
 * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _TLS_OFFLOAD_H
#define _TLS_OFFLOAD_H

#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/crypto.h>
#include <linux/socket.h>
#include <linux/tcp.h>
#include <linux/skmsg.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/rcupdate.h>

#include <net/tcp.h>
#include <net/strparser.h>
#include <crypto/aead.h>
#include <uapi/linux/tls.h>

/* Maximum data size carried in a TLS record */
#define TLS_MAX_PAYLOAD_SIZE		((size_t)1 << 14)

#define TLS_HEADER_SIZE			5
#define TLS_NONCE_OFFSET		TLS_HEADER_SIZE

#define TLS_CRYPTO_INFO_READY(info)	((info)->cipher_type)

#define TLS_RECORD_TYPE_DATA		0x17

#define TLS_AAD_SPACE_SIZE		13
#define TLS_DEVICE_NAME_MAX		32

#define MAX_IV_SIZE			16
#define TLS_MAX_REC_SEQ_SIZE		8

/* For AES-CCM, the full 16-bytes of IV is made of '4' fields of given sizes.
 *
 * IV[16] = b0[1] || implicit nonce[4] || explicit nonce[8] || length[3]
 *
 * The field 'length' is encoded in field 'b0' as '(length width - 1)'.
 * Hence b0 contains (3 - 1) = 2.
 */
#define TLS_AES_CCM_IV_B0_BYTE		2

/*
 * This structure defines the routines for Inline TLS driver.
 * The following routines are optional and filled with a
 * null pointer if not defined.
 *
 * @name: Its the name of registered Inline tls device
 * @dev_list: Inline tls device list
 * int (*feature)(struct tls_device *device);
 *     Called to return Inline TLS driver capability
 *
 * int (*hash)(struct tls_device *device, struct sock *sk);
 *     This function sets Inline driver for listen and program
 *     device specific functioanlity as required
 *
 * void (*unhash)(struct tls_device *device, struct sock *sk);
 *     This function cleans listen state set by Inline TLS driver
 *
 * void (*release)(struct kref *kref);
 *     Release the registered device and allocated resources
 * @kref: Number of reference to tls_device
 */
struct tls_device {
	char name[TLS_DEVICE_NAME_MAX];
	struct list_head dev_list;
	int  (*feature)(struct tls_device *device);
	int  (*hash)(struct tls_device *device, struct sock *sk);
	void (*unhash)(struct tls_device *device, struct sock *sk);
	void (*release)(struct kref *kref);
	struct kref kref;
};

enum {
	TLS_BASE,
	TLS_SW,
	TLS_HW,
	TLS_HW_RECORD,
	TLS_NUM_CONFIG,
};

/* TLS records are maintained in 'struct tls_rec'. It stores the memory pages
 * allocated or mapped for each TLS record. After encryption, the records are
 * stores in a linked list.
 */
struct tls_rec {
	struct list_head list;
	int tx_ready;
	int tx_flags;

struct sk_msg msg_plaintext;
	struct sk_msg msg_encrypted;

/* AAD | msg_plaintext.sg.data | sg_tag */
	struct scatterlist sg_aead_in[2];
	/* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */
	struct scatterlist sg_aead_out[2];

char content_type;
	struct scatterlist sg_content_type;

char aad_space[TLS_AAD_SPACE_SIZE];
	u8 iv_data[MAX_IV_SIZE];
	struct aead_request aead_req;
	u8 aead_req_ctx[];
};

struct tx_work {
	struct delayed_work work;
	struct sock *sk;
};

struct tls_sw_context_tx {
	struct crypto_aead *aead_send;
	struct crypto_wait async_wait;
	struct tx_work tx_work;
	struct tls_rec *open_rec;
	struct list_head tx_list;
	atomic_t encrypt_pending;
	int async_capable;

#define BIT_TX_SCHEDULED	0
#define BIT_TX_CLOSING		1
	unsigned long tx_bitmask;
};

struct tls_sw_context_rx {
	struct crypto_aead *aead_recv;
	struct crypto_wait async_wait;
	struct strparser strp;
	struct sk_buff_head rx_list;	/* list of decrypted 'data' records */
	void (*saved_data_ready)(struct sock *sk);

struct sk_buff *recv_pkt;
	int async_capable;
	atomic_t decrypt_pending;
};

struct tls_record_info {
	struct list_head list;
	u32 end_seq;
	int len;
	int num_frags;
	skb_frag_t frags[MAX_SKB_FRAGS];
};

struct tls_offload_context_tx {
	struct crypto_aead *aead_send;
	spinlock_t lock;	/* protects records list */
	struct list_head records_list;
	struct tls_record_info *open_record;
	struct tls_record_info *retransmit_hint;
	u64 hint_record_sn;
	u64 unacked_record_sn;

struct scatterlist sg_tx_data[MAX_SKB_FRAGS];
	void (*sk_destruct)(struct sock *sk);
	struct work_struct destruct_work;
	struct tls_context *ctx;
	u8 driver_state[] __aligned(8);
	/* The TLS layer reserves room for driver specific state
	 * Currently the belief is that there is not enough
	 * driver specific state to justify another layer of indirection
	 */
#define TLS_DRIVER_STATE_SIZE_TX	16
};

#define TLS_OFFLOAD_CONTEXT_SIZE_TX                                            \
	(sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX)

enum tls_context_flags {
	/* tls_device_down was called after the netdev went down, device state
	 * was released, and kTLS works in software, even though rx_conf is
	 * still TLS_HW (needed for transition).
	 */
	TLS_RX_DEV_DEGRADED = 0,
	/* Unlike RX where resync is driven entirely by the core in TX only
	 * the driver knows when things went out of sync, so we need the flag
	 * to be atomic.
	 */
	TLS_TX_SYNC_SCHED = 1,
	/* tls_dev_del was called for the RX side, device state was released,
	 * but tls_ctx->netdev might still be kept, because TX-side driver
	 * resources might not be released yet. Used to prevent the second
	 * tls_dev_del call in tls_device_down if it happens simultaneously.
	 */
	TLS_RX_DEV_CLOSED = 2,
};

struct cipher_context {
	char *iv;
	char *rec_seq;
};

union tls_crypto_context {
	struct tls_crypto_info info;
	union {
		struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
		struct tls12_crypto_info_aes_gcm_256 aes_gcm_256;
	};
};

struct tls_prot_info {
	u16 version;
	u16 cipher_type;
	u16 prepend_size;
	u16 tag_size;
	u16 overhead_size;
	u16 iv_size;
	u16 salt_size;
	u16 rec_seq_size;
	u16 aad_size;
	u16 tail_size;
};

struct tls_context {
	/* read-only cache line */
	struct tls_prot_info prot_info;

u8 tx_conf:3;
	u8 rx_conf:3;

int (*push_pending_record)(struct sock *sk, int flags);
	void (*sk_write_space)(struct sock *sk);

void *priv_ctx_tx;
	void *priv_ctx_rx;

struct net_device *netdev;

/* rw cache line */
	struct cipher_context tx;
	struct cipher_context rx;

struct scatterlist *partially_sent_record;
	u16 partially_sent_offset;

bool in_tcp_sendpages;
	bool pending_open_record_frags;

struct mutex tx_lock; /* protects partially_sent_* fields and
			       * per-type TX fields
			       */
	unsigned long flags;

/* cache cold stuff */
	struct proto *sk_proto;
	struct sock *sk;

void (*sk_destruct)(struct sock *sk);

union tls_crypto_context crypto_send;
	union tls_crypto_context crypto_recv;

struct list_head list;
	refcount_t refcount;
	struct rcu_head rcu;
};

enum tls_offload_ctx_dir {
	TLS_OFFLOAD_CTX_DIR_RX,
	TLS_OFFLOAD_CTX_DIR_TX,
};

struct tlsdev_ops {
	int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
			   enum tls_offload_ctx_dir direction,
			   struct tls_crypto_info *crypto_info,
			   u32 start_offload_tcp_sn);
	void (*tls_dev_del)(struct net_device *netdev,
			    struct tls_context *ctx,
			    enum tls_offload_ctx_dir direction);
	int (*tls_dev_resync)(struct net_device *netdev,
			      struct sock *sk, u32 seq, u8 *rcd_sn,
			      enum tls_offload_ctx_dir direction);
};

enum tls_offload_sync_type {
	TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0,
	TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1,
};

#define TLS_DEVICE_RESYNC_NH_START_IVAL		2
#define TLS_DEVICE_RESYNC_NH_MAX_IVAL		128

struct tls_offload_context_rx {
	/* sw must be the first member of tls_offload_context_rx */
	struct tls_sw_context_rx sw;
	enum tls_offload_sync_type resync_type;
	/* this member is set regardless of resync_type, to avoid branches */
	u8 resync_nh_reset:1;
	/* CORE_NEXT_HINT-only member, but use the hole here */
	u8 resync_nh_do_now:1;
	union {
		/* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */
		struct {
			atomic64_t resync_req;
		};
		/* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */
		struct {
			u32 decrypted_failed;
			u32 decrypted_tgt;
		} resync_nh;
	};
	u8 driver_state[] __aligned(8);
	/* The TLS layer reserves room for driver specific state
	 * Currently the belief is that there is not enough
	 * driver specific state to justify another layer of indirection
	 */
#define TLS_DRIVER_STATE_SIZE_RX	8
};

#define TLS_OFFLOAD_CONTEXT_SIZE_RX					\
	(sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX)

void tls_ctx_free(struct sock *sk, struct tls_context *ctx);
int wait_on_pending_writer(struct sock *sk, long *timeo);
int tls_sk_query(struct sock *sk, int optname, char __user *optval,
		int __user *optlen);
int tls_sk_attach(struct sock *sk, int optname, char __user *optval,
		  unsigned int optlen);
void tls_err_abort(struct sock *sk, int err);

int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
void tls_sw_strparser_done(struct tls_context *tls_ctx);
int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
			   int offset, size_t size, int flags);
int tls_sw_sendpage(struct sock *sk, struct page *page,
		    int offset, size_t size, int flags);
void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);
void tls_sw_release_resources_tx(struct sock *sk);
void tls_sw_free_ctx_tx(struct tls_context *tls_ctx);
void tls_sw_free_resources_rx(struct sock *sk);
void tls_sw_release_resources_rx(struct sock *sk);
void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
		   int nonblock, int flags, int *addr_len);
bool tls_sw_stream_read(const struct sock *sk);
ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
			   struct pipe_inode_info *pipe,
			   size_t len, unsigned int flags);

int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
int tls_device_sendpage(struct sock *sk, struct page *page,
			int offset, size_t size, int flags);
int tls_tx_records(struct sock *sk, int flags);

struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context,
				       u32 seq, u64 *p_record_sn);

static inline bool tls_record_is_start_marker(struct tls_record_info *rec)
{
	return rec->len == 0;
}

static inline u32 tls_record_start_seq(struct tls_record_info *rec)
{
	return rec->end_seq - rec->len;
}

int tls_push_sg(struct sock *sk, struct tls_context *ctx,
		struct scatterlist *sg, u16 first_offset,
		int flags);
int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
			    int flags);
void tls_free_partial_record(struct sock *sk, struct tls_context *ctx);

static inline struct tls_msg *tls_msg(struct sk_buff *skb)
{
	struct sk_skb_cb *scb = (struct sk_skb_cb *)skb->cb;

return &scb->tls;
}

static inline bool tls_is_partially_sent_record(struct tls_context *ctx)
{
	return !!ctx->partially_sent_record;
}

static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)
{
	return tls_ctx->pending_open_record_frags;
}

static inline bool is_tx_ready(struct tls_sw_context_tx *ctx)
{
	struct tls_rec *rec;

rec = list_first_entry_or_null(&ctx->tx_list, struct tls_rec, list);
	if (!rec)
		return false;

return READ_ONCE(rec->tx_ready);
}

static inline u16 tls_user_config(struct tls_context *ctx, bool tx)
{
	u16 config = tx ? ctx->tx_conf : ctx->rx_conf;

switch (config) {
	case TLS_BASE:
		return TLS_CONF_BASE;
	case TLS_SW:
		return TLS_CONF_SW;
	case TLS_HW:
		return TLS_CONF_HW;
	case TLS_HW_RECORD:
		return TLS_CONF_HW_RECORD;
	}
	return 0;
}

struct sk_buff *
tls_validate_xmit_skb(struct sock *sk, struct net_device *dev,
		      struct sk_buff *skb);
struct sk_buff *
tls_validate_xmit_skb_sw(struct sock *sk, struct net_device *dev,
			 struct sk_buff *skb);

static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk)
{
#ifdef CONFIG_SOCK_VALIDATE_XMIT
	return sk_fullsock(sk) &&
	       (smp_load_acquire(&sk->sk_validate_xmit_skb) ==
	       &tls_validate_xmit_skb);
#else
	return false;
#endif
}

static inline bool tls_bigint_increment(unsigned char *seq, int len)
{
	int i;

for (i = len - 1; i >= 0; i--) {
		++seq[i];
		if (seq[i] != 0)
			break;
	}

return (i == -1);
}

static inline struct tls_context *tls_get_ctx(const struct sock *sk)
{
	struct inet_connection_sock *icsk = inet_csk(sk);

/* Use RCU on icsk_ulp_data only for sock diag code,
	 * TLS data path doesn't need rcu_dereference().
	 */
	return (__force void *)icsk->icsk_ulp_data;
}

static inline void tls_advance_record_sn(struct sock *sk,
					 struct tls_prot_info *prot,
					 struct cipher_context *ctx)
{
	if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
		tls_err_abort(sk, -EBADMSG);

if (prot->version != TLS_1_3_VERSION)
		tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
				     prot->iv_size);
}

static inline void tls_fill_prepend(struct tls_context *ctx,
			     char *buf,
			     size_t plaintext_len,
			     unsigned char record_type,
			     int version)
{
	struct tls_prot_info *prot = &ctx->prot_info;
	size_t pkt_len, iv_size = prot->iv_size;

pkt_len = plaintext_len + prot->tag_size;
	if (version != TLS_1_3_VERSION) {
		pkt_len += iv_size;

memcpy(buf + TLS_NONCE_OFFSET,
		       ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size);
	}

/* we cover nonce explicit here as well, so buf should be of
	 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE
	 */
	buf[0] = version == TLS_1_3_VERSION ?
		   TLS_RECORD_TYPE_DATA : record_type;
	/* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */
	buf[1] = TLS_1_2_VERSION_MINOR;
	buf[2] = TLS_1_2_VERSION_MAJOR;
	/* we can use IV for nonce explicit according to spec */
	buf[3] = pkt_len >> 8;
	buf[4] = pkt_len & 0xFF;
}

static inline void tls_make_aad(char *buf,
				size_t size,
				char *record_sequence,
				int record_sequence_size,
				unsigned char record_type,
				int version)
{
	if (version != TLS_1_3_VERSION) {
		memcpy(buf, record_sequence, record_sequence_size);
		buf += 8;
	} else {
		size += TLS_CIPHER_AES_GCM_128_TAG_SIZE;
	}

buf[0] = version == TLS_1_3_VERSION ?
		  TLS_RECORD_TYPE_DATA : record_type;
	buf[1] = TLS_1_2_VERSION_MAJOR;
	buf[2] = TLS_1_2_VERSION_MINOR;
	buf[3] = size >> 8;
	buf[4] = size & 0xFF;
}

static inline void xor_iv_with_seq(int version, char *iv, char *seq)
{
	int i;

if (version == TLS_1_3_VERSION) {
		for (i = 0; i < 8; i++)
			iv[i + 4] ^= seq[i];
	}
}

static inline struct tls_sw_context_rx *tls_sw_ctx_rx(
		const struct tls_context *tls_ctx)
{
	return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx;
}

static inline struct tls_sw_context_tx *tls_sw_ctx_tx(
		const struct tls_context *tls_ctx)
{
	return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx;
}

static inline struct tls_offload_context_tx *
tls_offload_ctx_tx(const struct tls_context *tls_ctx)
{
	return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx;
}

static inline bool tls_sw_has_ctx_tx(const struct sock *sk)
{
	struct tls_context *ctx = tls_get_ctx(sk);

if (!ctx)
		return false;
	return !!tls_sw_ctx_tx(ctx);
}

static inline bool tls_sw_has_ctx_rx(const struct sock *sk)
{
	struct tls_context *ctx = tls_get_ctx(sk);

if (!ctx)
		return false;
	return !!tls_sw_ctx_rx(ctx);
}

void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
void tls_device_write_space(struct sock *sk, struct tls_context *ctx);

static inline struct tls_offload_context_rx *
tls_offload_ctx_rx(const struct tls_context *tls_ctx)
{
	return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx;
}

#if IS_ENABLED(CONFIG_TLS_DEVICE)
static inline void *__tls_driver_ctx(struct tls_context *tls_ctx,
				     enum tls_offload_ctx_dir direction)
{
	if (direction == TLS_OFFLOAD_CTX_DIR_TX)
		return tls_offload_ctx_tx(tls_ctx)->driver_state;
	else
		return tls_offload_ctx_rx(tls_ctx)->driver_state;
}

static inline void *
tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction)
{
	return __tls_driver_ctx(tls_get_ctx(sk), direction);
}
#endif

/* The TLS context is valid until sk_destruct is called */
static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
{
	struct tls_context *tls_ctx = tls_get_ctx(sk);
	struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);

atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | 1);
}

static inline void
tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type)
{
	struct tls_context *tls_ctx = tls_get_ctx(sk);

tls_offload_ctx_rx(tls_ctx)->resync_type = type;
}

static inline void tls_offload_tx_resync_request(struct sock *sk)
{
	struct tls_context *tls_ctx = tls_get_ctx(sk);

WARN_ON(test_and_set_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags));
}

/* Driver's seq tracking has to be disabled until resync succeeded */
static inline bool tls_offload_tx_resync_pending(struct sock *sk)
{
	struct tls_context *tls_ctx = tls_get_ctx(sk);
	bool ret;

ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags);
	smp_mb__after_atomic();
	return ret;
}

int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
		      unsigned char *record_type);
void tls_register_device(struct tls_device *device);
void tls_unregister_device(struct tls_device *device);
int decrypt_skb(struct sock *sk, struct sk_buff *skb,
		struct scatterlist *sgout);
struct sk_buff *tls_encrypt_skb(struct sk_buff *skb);

struct sk_buff *tls_validate_xmit_skb(struct sock *sk,
				      struct net_device *dev,
				      struct sk_buff *skb);

int tls_sw_fallback_init(struct sock *sk,
			 struct tls_offload_context_tx *offload_ctx,
			 struct tls_crypto_info *crypto_info);

#ifdef CONFIG_TLS_DEVICE
int tls_device_init(void);
void tls_device_cleanup(void);
int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
void tls_device_free_resources_tx(struct sock *sk);
int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
void tls_device_offload_cleanup_rx(struct sock *sk);
void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
			 struct sk_buff *skb, struct strp_msg *rxm);
#else
static inline int tls_device_init(void) { return 0; }
static inline void tls_device_cleanup(void) {}

static inline int
tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
{
	return -EOPNOTSUPP;
}

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

static inline int
tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
{
	return -EOPNOTSUPP;
}

static inline void tls_device_offload_cleanup_rx(struct sock *sk) {}
static inline void
tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {}

static inline int
tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
		     struct sk_buff *skb, struct strp_msg *rxm)
{
	return 0;
}
#endif
#endif /* _TLS_OFFLOAD_H */

${this.title}

Code Editor : tls.h