[deliverable/linux.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, write to the
 * Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

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);
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
	15	* along with this program; if not, write to the
	16	* Free Software Foundation, Inc.,
	17	* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	18	*/
	19
	20	enum llcp_state {
	21	LLCP_CONNECTED = 1, /* wait_for_packet() wants that */
b4011239	22	LLCP_CONNECTING,
17f7ae16	23	LLCP_DISCONNECTING,
d646960f SO	24	LLCP_CLOSED,
	25	LLCP_BOUND,
	26	LLCP_LISTEN,
	27	};
	28
	29	#define LLCP_DEFAULT_LTO 100
	30	#define LLCP_DEFAULT_RW 1
	31	#define LLCP_DEFAULT_MIU 128
	32
eda21f16 SO	33	#define LLCP_MAX_LTO 0xff
	34	#define LLCP_MAX_RW 15
	35	#define LLCP_MAX_MIUX 0x7ff
66cbfa10	36	#define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128)
eda21f16	37
d646960f SO	38	#define LLCP_WKS_NUM_SAP 16
	39	#define LLCP_SDP_NUM_SAP 16
	40	#define LLCP_LOCAL_NUM_SAP 32
	41	#define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP)
	42	#define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP)
8f50020e	43	#define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1)
d646960f SO	44
	45	struct nfc_llcp_sock;
	46
a69f32af SO	47	struct llcp_sock_list {
	48	struct hlist_head head;
	49	rwlock_t lock;
	50	};
	51
e0ae7bac TE	52	struct nfc_llcp_sdp_tlv {
	53	u8 *tlv;
	54	u8 tlv_len;
	55
	56	char *uri;
	57	u8 tid;
	58	u8 sap;
	59
40213fa8 TE	60	unsigned long time;
40213fa8 TE	61
e0ae7bac TE	62	struct hlist_node node;
	63	};
	64
d646960f SO	65	struct nfc_llcp_local {
	66	struct list_head list;
	67	struct nfc_dev *dev;
	68
c7aa1225 SO	69	struct kref ref;
c7aa1225 SO	70
d646960f	71	struct mutex sdp_lock;
d646960f SO	72
	73	struct timer_list link_timer;
	74	struct sk_buff_head tx_queue;
d646960f	75	struct work_struct tx_work;
d646960f SO	76	struct work_struct rx_work;
d646960f SO	77	struct sk_buff *rx_pending;
d646960f SO	78	struct work_struct timeout_work;
	79
	80	u32 target_idx;
	81	u8 rf_mode;
	82	u8 comm_mode;
52feb444 TE	83	u8 lto;
	84	u8 rw;
	85	__be16 miux;
d646960f SO	86	unsigned long local_wks; /* Well known services */
	87	unsigned long local_sdp; /* Local services */
	88	unsigned long local_sap; /* Local SAPs, not available for discovery */
8f50020e	89	atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP];
d646960f SO	90
	91	/* local */
	92	u8 gb[NFC_MAX_GT_LEN];
	93	u8 gb_len;
	94
	95	/* remote */
	96	u8 remote_gb[NFC_MAX_GT_LEN];
	97	u8 remote_gb_len;
	98
	99	u8 remote_version;
	100	u16 remote_miu;
	101	u16 remote_lto;
	102	u8 remote_opt;
	103	u16 remote_wks;
d646960f	104
d9b8d8e1 TE	105	struct mutex sdreq_lock;
d9b8d8e1 TE	106	struct hlist_head pending_sdreqs;
40213fa8 TE	107	struct timer_list sdreq_timer;
40213fa8 TE	108	struct work_struct sdreq_timeout_work;
d9b8d8e1 TE	109	u8 sdreq_next_tid;
d9b8d8e1 TE	110
d646960f	111	/* sockets array */
a69f32af SO	112	struct llcp_sock_list sockets;
a69f32af SO	113	struct llcp_sock_list connecting_sockets;
4463523b	114	struct llcp_sock_list raw_sockets;
d646960f SO	115	};
	116
	117	struct nfc_llcp_sock {
	118	struct sock sk;
d646960f SO	119	struct nfc_dev *dev;
	120	struct nfc_llcp_local *local;
	121	u32 target_idx;
	122	u32 nfc_protocol;
	123
7a06e586	124	/* Link parameters */
d646960f SO	125	u8 ssap;
	126	u8 dsap;
	127	char *service_name;
	128	size_t service_name_len;
26fd76ca	129	u8 rw;
5eef6669	130	__be16 miux;
26fd76ca	131
e4306bec SO	132
	133	/* Remote link parameters */
	134	u8 remote_rw;
	135	u16 remote_miu;
d646960f SO	136
	137	/* Link variables */
	138	u8 send_n;
	139	u8 send_ack_n;
	140	u8 recv_n;
	141	u8 recv_ack_n;
	142
	143	/* Is the remote peer ready to receive */
	144	u8 remote_ready;
	145
cbbf4721 SO	146	/* Reserved source SAP */
	147	u8 reserved_ssap;
	148
d646960f SO	149	struct sk_buff_head tx_queue;
d646960f SO	150	struct sk_buff_head tx_pending_queue;
d646960f SO	151
	152	struct list_head accept_queue;
	153	struct sock *parent;
	154	};
	155
968272bf SO	156	struct nfc_llcp_ui_cb {
	157	__u8 dsap;
	158	__u8 ssap;
	159	};
	160
	161	#define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0]))
	162
d646960f SO	163	#define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
	164	#define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev)
	165
	166	#define LLCP_HEADER_SIZE 2
	167	#define LLCP_SEQUENCE_SIZE 1
098dafcf	168	#define LLCP_AGF_PDU_HEADER_SIZE 2
d646960f SO	169
	170	/* LLCP versions: 1.1 is 1.0 plus SDP */
	171	#define LLCP_VERSION_10 0x10
	172	#define LLCP_VERSION_11 0x11
	173
	174	/* LLCP PDU types */
	175	#define LLCP_PDU_SYMM 0x0
	176	#define LLCP_PDU_PAX 0x1
	177	#define LLCP_PDU_AGF 0x2
	178	#define LLCP_PDU_UI 0x3
	179	#define LLCP_PDU_CONNECT 0x4
	180	#define LLCP_PDU_DISC 0x5
	181	#define LLCP_PDU_CC 0x6
	182	#define LLCP_PDU_DM 0x7
	183	#define LLCP_PDU_FRMR 0x8
	184	#define LLCP_PDU_SNL 0x9
	185	#define LLCP_PDU_I 0xc
	186	#define LLCP_PDU_RR 0xd
	187	#define LLCP_PDU_RNR 0xe
	188
	189	/* Parameters TLV types */
	190	#define LLCP_TLV_VERSION 0x1
	191	#define LLCP_TLV_MIUX 0x2
	192	#define LLCP_TLV_WKS 0x3
	193	#define LLCP_TLV_LTO 0x4
	194	#define LLCP_TLV_RW 0x5
	195	#define LLCP_TLV_SN 0x6
	196	#define LLCP_TLV_OPT 0x7
	197	#define LLCP_TLV_SDREQ 0x8
	198	#define LLCP_TLV_SDRES 0x9
	199	#define LLCP_TLV_MAX 0xa
	200
	201	/* Well known LLCP SAP */
	202	#define LLCP_SAP_SDP 0x1
	203	#define LLCP_SAP_IP 0x2
	204	#define LLCP_SAP_OBEX 0x3
	205	#define LLCP_SAP_SNEP 0x4
	206	#define LLCP_SAP_MAX 0xff
	207
	208	/* Disconnection reason code */
	209	#define LLCP_DM_DISC 0x00
	210	#define LLCP_DM_NOCONN 0x01
	211	#define LLCP_DM_NOBOUND 0x02
	212	#define LLCP_DM_REJ 0x03
	213
	214
a69f32af SO	215	void nfc_llcp_sock_link(struct llcp_sock_list l, struct sock s);
a69f32af SO	216	void nfc_llcp_sock_unlink(struct llcp_sock_list l, struct sock s);
abd18d43	217	void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock);
d646960f	218	struct nfc_llcp_local nfc_llcp_find_local(struct nfc_dev dev);
c7aa1225 SO	219	struct nfc_llcp_local nfc_llcp_local_get(struct nfc_llcp_local local);
c7aa1225 SO	220	int nfc_llcp_local_put(struct nfc_llcp_local *local);
d646960f	221	u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
427a2eb1	222	struct nfc_llcp_sock *sock);
d646960f SO	223	u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
d646960f SO	224	void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
d094afa1	225	int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
4463523b TE	226	void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
4463523b TE	227	struct sk_buff *skb, u8 direction);
d646960f SO	228
	229	/* Sock API */
	230	struct sock nfc_llcp_sock_alloc(struct socket sock, int type, gfp_t gfp);
	231	void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
	232	void nfc_llcp_accept_unlink(struct sock *sk);
	233	void nfc_llcp_accept_enqueue(struct sock parent, struct sock sk);
	234	struct sock nfc_llcp_accept_dequeue(struct sock sk, struct socket *newsock);
	235
	236	/* TLV API */
7a06e586 SO	237	int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
	238	u8 *tlv_array, u16 tlv_array_len);
	239	int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
	240	u8 *tlv_array, u16 tlv_array_len);
d646960f SO	241
	242	/* Commands API */
	243	void nfc_llcp_recv(void data, struct sk_buff skb, int err);
	244	u8 nfc_llcp_build_tlv(u8 type, u8 value, u8 value_length, u8 *tlv_length);
e0ae7bac	245	struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap);
d9b8d8e1 TE	246	struct nfc_llcp_sdp_tlv nfc_llcp_build_sdreq_tlv(u8 tid, char uri,
d9b8d8e1 TE	247	size_t uri_len);
e0ae7bac	248	void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp);
d9b8d8e1	249	void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head);
d646960f	250	void nfc_llcp_recv(void data, struct sk_buff skb, int err);
d646960f SO	251	int nfc_llcp_send_symm(struct nfc_dev *dev);
	252	int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
	253	int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
e0ae7bac TE	254	int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
e0ae7bac TE	255	struct hlist_head *tlv_list, size_t tlvs_len);
d9b8d8e1 TE	256	int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
d9b8d8e1 TE	257	struct hlist_head *tlv_list, size_t tlvs_len);
d646960f SO	258	int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
d646960f SO	259	int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
53a0ac2e	260	int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
427a2eb1	261	struct msghdr *msg, size_t len);
94f418a2 SO	262	int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
94f418a2 SO	263	struct msghdr *msg, size_t len);
d094afa1	264	int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
d646960f SO	265
	266	/* Socket API */
	267	int __init nfc_llcp_sock_init(void);
	268	void nfc_llcp_sock_exit(void);