net/nfc/llcp.h - arm/linux - Git at Google


            
            /*

            
             * 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);
	/*
	* 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);