[linux-2.6-block.git] / net / nfc / llcp.h

/*
 * Copyright (C) 2011  Intel Corporation. All rights reserved.
 *
 * This program 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 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
 */

enum llcp_state {
	LLCP_CONNECTED = 1, /* wait_for_packet() wants that */
	LLCP_CONNECTING,
	LLCP_DISCONNECTING,
	LLCP_CLOSED,
	LLCP_BOUND,
	LLCP_LISTEN,
};

#define LLCP_DEFAULT_LTO 100
#define LLCP_DEFAULT_RW  1
#define LLCP_DEFAULT_MIU 128

#define LLCP_MAX_LTO  0xff
#define LLCP_MAX_RW   15
#define LLCP_MAX_MIUX 0x7ff
#define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128)

#define LLCP_WKS_NUM_SAP   16
#define LLCP_SDP_NUM_SAP   16
#define LLCP_LOCAL_NUM_SAP 32
#define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP)
#define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP)
#define LLCP_SDP_UNBOUND   (LLCP_MAX_SAP + 1)

struct nfc_llcp_sock;

struct llcp_sock_list {
	struct hlist_head head;
	rwlock_t          lock;
};

struct nfc_llcp_sdp_tlv {
	u8 *tlv;
	u8 tlv_len;

	char *uri;
	u8 tid;
	u8 sap;

	unsigned long time;

	struct hlist_node node;
};

struct nfc_llcp_local {
	struct list_head list;
	struct nfc_dev *dev;

	struct kref ref;

	struct mutex sdp_lock;

	struct timer_list link_timer;
	struct sk_buff_head tx_queue;
	struct work_struct	 tx_work;
	struct work_struct	 rx_work;
	struct sk_buff *rx_pending;
	struct work_struct	 timeout_work;

	u32 target_idx;
	u8 rf_mode;
	u8 comm_mode;
	u8 lto;
	u8 rw;
	__be16 miux;
	unsigned long local_wks;      /* Well known services */
	unsigned long local_sdp;      /* Local services  */
	unsigned long local_sap; /* Local SAPs, not available for discovery */
	atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP];

	/* local */
	u8 gb[NFC_MAX_GT_LEN];
	u8 gb_len;

	/* remote */
	u8 remote_gb[NFC_MAX_GT_LEN];
	u8 remote_gb_len;

	u8  remote_version;
	u16 remote_miu;
	u16 remote_lto;
	u8  remote_opt;
	u16 remote_wks;

	struct mutex sdreq_lock;
	struct hlist_head pending_sdreqs;
	struct timer_list sdreq_timer;
	struct work_struct sdreq_timeout_work;
	u8 sdreq_next_tid;

	/* sockets array */
	struct llcp_sock_list sockets;
	struct llcp_sock_list connecting_sockets;
	struct llcp_sock_list raw_sockets;
};

struct nfc_llcp_sock {
	struct sock sk;
	struct nfc_dev *dev;
	struct nfc_llcp_local *local;
	u32 target_idx;
	u32 nfc_protocol;

	/* Link parameters */
	u8 ssap;
	u8 dsap;
	char *service_name;
	size_t service_name_len;
	u8 rw;
	__be16 miux;


	/* Remote link parameters */
	u8 remote_rw;
	u16 remote_miu;

	/* Link variables */
	u8 send_n;
	u8 send_ack_n;
	u8 recv_n;
	u8 recv_ack_n;

	/* Is the remote peer ready to receive */
	u8 remote_ready;

	/* Reserved source SAP */
	u8 reserved_ssap;

	struct sk_buff_head tx_queue;
	struct sk_buff_head tx_pending_queue;

	struct list_head accept_queue;
	struct sock *parent;
};

struct nfc_llcp_ui_cb {
	__u8 dsap;
	__u8 ssap;
};

#define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0]))

#define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
#define nfc_llcp_dev(sk)  (nfc_llcp_sock((sk))->dev)

#define LLCP_HEADER_SIZE   2
#define LLCP_SEQUENCE_SIZE 1
#define LLCP_AGF_PDU_HEADER_SIZE 2

/* LLCP versions: 1.1 is 1.0 plus SDP */
#define LLCP_VERSION_10 0x10
#define LLCP_VERSION_11 0x11

/* LLCP PDU types */
#define LLCP_PDU_SYMM     0x0
#define LLCP_PDU_PAX      0x1
#define LLCP_PDU_AGF      0x2
#define LLCP_PDU_UI       0x3
#define LLCP_PDU_CONNECT  0x4
#define LLCP_PDU_DISC     0x5
#define LLCP_PDU_CC       0x6
#define LLCP_PDU_DM       0x7
#define LLCP_PDU_FRMR     0x8
#define LLCP_PDU_SNL      0x9
#define LLCP_PDU_I        0xc
#define LLCP_PDU_RR       0xd
#define LLCP_PDU_RNR      0xe

/* Parameters TLV types */
#define LLCP_TLV_VERSION 0x1
#define LLCP_TLV_MIUX    0x2
#define LLCP_TLV_WKS     0x3
#define LLCP_TLV_LTO     0x4
#define LLCP_TLV_RW      0x5
#define LLCP_TLV_SN      0x6
#define LLCP_TLV_OPT     0x7
#define LLCP_TLV_SDREQ   0x8
#define LLCP_TLV_SDRES   0x9
#define LLCP_TLV_MAX     0xa

/* Well known LLCP SAP */
#define LLCP_SAP_SDP   0x1
#define LLCP_SAP_IP    0x2
#define LLCP_SAP_OBEX  0x3
#define LLCP_SAP_SNEP  0x4
#define LLCP_SAP_MAX   0xff

/* Disconnection reason code */
#define LLCP_DM_DISC    0x00
#define LLCP_DM_NOCONN  0x01
#define LLCP_DM_NOBOUND 0x02
#define LLCP_DM_REJ     0x03


void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s);
void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s);
void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock);
struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local);
int nfc_llcp_local_put(struct nfc_llcp_local *local);
u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
			 struct nfc_llcp_sock *sock);
u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
			       struct sk_buff *skb, u8 direction);

/* Sock API */
struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern);
void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
void nfc_llcp_accept_unlink(struct sock *sk);
void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk);
struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock);

/* TLV API */
int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
			  u8 *tlv_array, u16 tlv_array_len);
int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
				  u8 *tlv_array, u16 tlv_array_len);

/* Commands API */
void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length);
struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap);
struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri,
						  size_t uri_len);
void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp);
void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head);
void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
int nfc_llcp_send_symm(struct nfc_dev *dev);
int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
			    struct hlist_head *tlv_list, size_t tlvs_len);
int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
			    struct hlist_head *tlv_list, size_t tlvs_len);
int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
			  struct msghdr *msg, size_t len);
int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
			   struct msghdr *msg, size_t len);
int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);

/* Socket API */
int __init nfc_llcp_sock_init(void);
void nfc_llcp_sock_exit(void);
Commit	Line	Data
d646960f SO	1	/*
	2	* Copyright (C) 2011 Intel Corporation. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
98b32dec	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
d646960f SO	16	*/
	17
	18	enum llcp_state {
	19	LLCP_CONNECTED = 1, /* wait_for_packet() wants that */
b4011239	20	LLCP_CONNECTING,
17f7ae16	21	LLCP_DISCONNECTING,
d646960f SO	22	LLCP_CLOSED,
	23	LLCP_BOUND,
	24	LLCP_LISTEN,
	25	};
	26
	27	#define LLCP_DEFAULT_LTO 100
	28	#define LLCP_DEFAULT_RW 1
	29	#define LLCP_DEFAULT_MIU 128
	30
eda21f16 SO	31	#define LLCP_MAX_LTO 0xff
	32	#define LLCP_MAX_RW 15
	33	#define LLCP_MAX_MIUX 0x7ff
66cbfa10	34	#define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128)
eda21f16	35
d646960f SO	36	#define LLCP_WKS_NUM_SAP 16
	37	#define LLCP_SDP_NUM_SAP 16
	38	#define LLCP_LOCAL_NUM_SAP 32
	39	#define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP)
	40	#define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP)
8f50020e	41	#define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1)
d646960f SO	42
	43	struct nfc_llcp_sock;
	44
a69f32af SO	45	struct llcp_sock_list {
	46	struct hlist_head head;
	47	rwlock_t lock;
	48	};
	49
e0ae7bac TE	50	struct nfc_llcp_sdp_tlv {
	51	u8 *tlv;
	52	u8 tlv_len;
	53
	54	char *uri;
	55	u8 tid;
	56	u8 sap;
	57
40213fa8 TE	58	unsigned long time;
40213fa8 TE	59
e0ae7bac TE	60	struct hlist_node node;
	61	};
	62
d646960f SO	63	struct nfc_llcp_local {
	64	struct list_head list;
	65	struct nfc_dev *dev;
	66
c7aa1225 SO	67	struct kref ref;
c7aa1225 SO	68
d646960f	69	struct mutex sdp_lock;
d646960f SO	70
	71	struct timer_list link_timer;
	72	struct sk_buff_head tx_queue;
d646960f	73	struct work_struct tx_work;
d646960f SO	74	struct work_struct rx_work;
d646960f SO	75	struct sk_buff *rx_pending;
d646960f SO	76	struct work_struct timeout_work;
	77
	78	u32 target_idx;
	79	u8 rf_mode;
	80	u8 comm_mode;
52feb444 TE	81	u8 lto;
	82	u8 rw;
	83	__be16 miux;
d646960f SO	84	unsigned long local_wks; /* Well known services */
	85	unsigned long local_sdp; /* Local services */
	86	unsigned long local_sap; /* Local SAPs, not available for discovery */
8f50020e	87	atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP];
d646960f SO	88
	89	/* local */
	90	u8 gb[NFC_MAX_GT_LEN];
	91	u8 gb_len;
	92
	93	/* remote */
	94	u8 remote_gb[NFC_MAX_GT_LEN];
	95	u8 remote_gb_len;
	96
	97	u8 remote_version;
	98	u16 remote_miu;
	99	u16 remote_lto;
	100	u8 remote_opt;
	101	u16 remote_wks;
d646960f	102
d9b8d8e1 TE	103	struct mutex sdreq_lock;
d9b8d8e1 TE	104	struct hlist_head pending_sdreqs;
40213fa8 TE	105	struct timer_list sdreq_timer;
40213fa8 TE	106	struct work_struct sdreq_timeout_work;
d9b8d8e1 TE	107	u8 sdreq_next_tid;
d9b8d8e1 TE	108
d646960f	109	/* sockets array */
a69f32af SO	110	struct llcp_sock_list sockets;
a69f32af SO	111	struct llcp_sock_list connecting_sockets;
4463523b	112	struct llcp_sock_list raw_sockets;
d646960f SO	113	};
	114
	115	struct nfc_llcp_sock {
	116	struct sock sk;
d646960f SO	117	struct nfc_dev *dev;
	118	struct nfc_llcp_local *local;
	119	u32 target_idx;
	120	u32 nfc_protocol;
	121
7a06e586	122	/* Link parameters */
d646960f SO	123	u8 ssap;
	124	u8 dsap;
	125	char *service_name;
	126	size_t service_name_len;
26fd76ca	127	u8 rw;
5eef6669	128	__be16 miux;
26fd76ca	129
e4306bec SO	130
	131	/* Remote link parameters */
	132	u8 remote_rw;
	133	u16 remote_miu;
d646960f SO	134
	135	/* Link variables */
	136	u8 send_n;
	137	u8 send_ack_n;
	138	u8 recv_n;
	139	u8 recv_ack_n;
	140
	141	/* Is the remote peer ready to receive */
	142	u8 remote_ready;
	143
cbbf4721 SO	144	/* Reserved source SAP */
	145	u8 reserved_ssap;
	146
d646960f SO	147	struct sk_buff_head tx_queue;
d646960f SO	148	struct sk_buff_head tx_pending_queue;
d646960f SO	149
	150	struct list_head accept_queue;
	151	struct sock *parent;
	152	};
	153
968272bf SO	154	struct nfc_llcp_ui_cb {
	155	__u8 dsap;
	156	__u8 ssap;
	157	};
	158
	159	#define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0]))
	160
d646960f SO	161	#define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
	162	#define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev)
	163
	164	#define LLCP_HEADER_SIZE 2
	165	#define LLCP_SEQUENCE_SIZE 1
098dafcf	166	#define LLCP_AGF_PDU_HEADER_SIZE 2
d646960f SO	167
	168	/* LLCP versions: 1.1 is 1.0 plus SDP */
	169	#define LLCP_VERSION_10 0x10
	170	#define LLCP_VERSION_11 0x11
	171
	172	/* LLCP PDU types */
	173	#define LLCP_PDU_SYMM 0x0
	174	#define LLCP_PDU_PAX 0x1
	175	#define LLCP_PDU_AGF 0x2
	176	#define LLCP_PDU_UI 0x3
	177	#define LLCP_PDU_CONNECT 0x4
	178	#define LLCP_PDU_DISC 0x5
	179	#define LLCP_PDU_CC 0x6
	180	#define LLCP_PDU_DM 0x7
	181	#define LLCP_PDU_FRMR 0x8
	182	#define LLCP_PDU_SNL 0x9
	183	#define LLCP_PDU_I 0xc
	184	#define LLCP_PDU_RR 0xd
	185	#define LLCP_PDU_RNR 0xe
	186
	187	/* Parameters TLV types */
	188	#define LLCP_TLV_VERSION 0x1
	189	#define LLCP_TLV_MIUX 0x2
	190	#define LLCP_TLV_WKS 0x3
	191	#define LLCP_TLV_LTO 0x4
	192	#define LLCP_TLV_RW 0x5
	193	#define LLCP_TLV_SN 0x6
	194	#define LLCP_TLV_OPT 0x7
	195	#define LLCP_TLV_SDREQ 0x8
	196	#define LLCP_TLV_SDRES 0x9
	197	#define LLCP_TLV_MAX 0xa
	198
	199	/* Well known LLCP SAP */
	200	#define LLCP_SAP_SDP 0x1
	201	#define LLCP_SAP_IP 0x2
	202	#define LLCP_SAP_OBEX 0x3
	203	#define LLCP_SAP_SNEP 0x4
	204	#define LLCP_SAP_MAX 0xff
	205
	206	/* Disconnection reason code */
	207	#define LLCP_DM_DISC 0x00
	208	#define LLCP_DM_NOCONN 0x01
	209	#define LLCP_DM_NOBOUND 0x02
	210	#define LLCP_DM_REJ 0x03
	211
	212
a69f32af SO	213	void nfc_llcp_sock_link(struct llcp_sock_list l, struct sock s);
a69f32af SO	214	void nfc_llcp_sock_unlink(struct llcp_sock_list l, struct sock s);
abd18d43	215	void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock);
d646960f	216	struct nfc_llcp_local nfc_llcp_find_local(struct nfc_dev dev);
c7aa1225 SO	217	struct nfc_llcp_local nfc_llcp_local_get(struct nfc_llcp_local local);
c7aa1225 SO	218	int nfc_llcp_local_put(struct nfc_llcp_local *local);
d646960f	219	u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
427a2eb1	220	struct nfc_llcp_sock *sock);
d646960f SO	221	u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
d646960f SO	222	void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
d094afa1	223	int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
4463523b TE	224	void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
4463523b TE	225	struct sk_buff *skb, u8 direction);
d646960f SO	226
d646960f SO	227	/* Sock API */
11aa9c28	228	struct sock nfc_llcp_sock_alloc(struct socket sock, int type, gfp_t gfp, int kern);
d646960f SO	229	void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
	230	void nfc_llcp_accept_unlink(struct sock *sk);
	231	void nfc_llcp_accept_enqueue(struct sock parent, struct sock sk);
	232	struct sock nfc_llcp_accept_dequeue(struct sock sk, struct socket *newsock);
	233
	234	/* TLV API */
7a06e586 SO	235	int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
	236	u8 *tlv_array, u16 tlv_array_len);
	237	int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
	238	u8 *tlv_array, u16 tlv_array_len);
d646960f SO	239
	240	/* Commands API */
	241	void nfc_llcp_recv(void data, struct sk_buff skb, int err);
	242	u8 nfc_llcp_build_tlv(u8 type, u8 value, u8 value_length, u8 *tlv_length);
e0ae7bac	243	struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap);
d9b8d8e1 TE	244	struct nfc_llcp_sdp_tlv nfc_llcp_build_sdreq_tlv(u8 tid, char uri,
d9b8d8e1 TE	245	size_t uri_len);
e0ae7bac	246	void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp);
d9b8d8e1	247	void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head);
d646960f	248	void nfc_llcp_recv(void data, struct sk_buff skb, int err);
d646960f SO	249	int nfc_llcp_send_symm(struct nfc_dev *dev);
	250	int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
	251	int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
e0ae7bac TE	252	int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
e0ae7bac TE	253	struct hlist_head *tlv_list, size_t tlvs_len);
d9b8d8e1 TE	254	int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
d9b8d8e1 TE	255	struct hlist_head *tlv_list, size_t tlvs_len);
d646960f SO	256	int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
d646960f SO	257	int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
53a0ac2e	258	int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
427a2eb1	259	struct msghdr *msg, size_t len);
94f418a2 SO	260	int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
94f418a2 SO	261	struct msghdr *msg, size_t len);
d094afa1	262	int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
d646960f SO	263
	264	/* Socket API */
	265	int __init nfc_llcp_sock_init(void);
	266	void nfc_llcp_sock_exit(void);