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review.evervolv.com / android_kernel_oneplus_sm8150 / 2d6cf2b51fa3492c479c6d1f86496e120b51e1d8 / . / net / nfc / llcp / llcp.h
blob: 0ad2e3361584a074ab2c0a09b489d1056889f247 [file] [log] [blame]
Samuel Ortizd6469602011-12-14 16:43:12 +0100[diff] [blame]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
20enum llcp_state {
21 LLCP_CONNECTED = 1, /* wait_for_packet() wants that */
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
31#define LLCP_WKS_NUM_SAP 16
32#define LLCP_SDP_NUM_SAP 16
33#define LLCP_LOCAL_NUM_SAP 32
34#define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP)
35#define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP)
36
37struct nfc_llcp_sock;
38
39struct nfc_llcp_local {
40 struct list_head list;
41 struct nfc_dev *dev;
42
43 struct mutex sdp_lock;
44 struct mutex socket_lock;
45
46 struct timer_list link_timer;
47 struct sk_buff_head tx_queue;
48 struct workqueue_struct *tx_wq;
49 struct work_struct tx_work;
50 struct workqueue_struct *rx_wq;
51 struct work_struct rx_work;
52 struct sk_buff *rx_pending;
53 struct workqueue_struct *timeout_wq;
54 struct work_struct timeout_work;
55
56 u32 target_idx;
57 u8 rf_mode;
58 u8 comm_mode;
59 unsigned long local_wks; /* Well known services */
60 unsigned long local_sdp; /* Local services */
61 unsigned long local_sap; /* Local SAPs, not available for discovery */
62
63 /* local */
64 u8 gb[NFC_MAX_GT_LEN];
65 u8 gb_len;
66
67 /* remote */
68 u8 remote_gb[NFC_MAX_GT_LEN];
69 u8 remote_gb_len;
70
71 u8 remote_version;
72 u16 remote_miu;
73 u16 remote_lto;
74 u8 remote_opt;
75 u16 remote_wks;
76 u8 remote_rw;
77
78 /* sockets array */
79 struct nfc_llcp_sock *sockets[LLCP_MAX_SAP];
80};
81
82struct nfc_llcp_sock {
83 struct sock sk;
84 struct list_head list;
85 struct nfc_dev *dev;
86 struct nfc_llcp_local *local;
87 u32 target_idx;
88 u32 nfc_protocol;
89
90 u8 ssap;
91 u8 dsap;
92 char *service_name;
93 size_t service_name_len;
94
95 /* Link variables */
96 u8 send_n;
97 u8 send_ack_n;
98 u8 recv_n;
99 u8 recv_ack_n;
100
101 /* Is the remote peer ready to receive */
102 u8 remote_ready;
103
104 struct sk_buff_head tx_queue;
105 struct sk_buff_head tx_pending_queue;
106 struct sk_buff_head tx_backlog_queue;
107
108 struct list_head accept_queue;
109 struct sock *parent;
110};
111
112#define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
113#define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev)
114
115#define LLCP_HEADER_SIZE 2
116#define LLCP_SEQUENCE_SIZE 1
117
118/* LLCP versions: 1.1 is 1.0 plus SDP */
119#define LLCP_VERSION_10 0x10
120#define LLCP_VERSION_11 0x11
121
122/* LLCP PDU types */
123#define LLCP_PDU_SYMM 0x0
124#define LLCP_PDU_PAX 0x1
125#define LLCP_PDU_AGF 0x2
126#define LLCP_PDU_UI 0x3
127#define LLCP_PDU_CONNECT 0x4
128#define LLCP_PDU_DISC 0x5
129#define LLCP_PDU_CC 0x6
130#define LLCP_PDU_DM 0x7
131#define LLCP_PDU_FRMR 0x8
132#define LLCP_PDU_SNL 0x9
133#define LLCP_PDU_I 0xc
134#define LLCP_PDU_RR 0xd
135#define LLCP_PDU_RNR 0xe
136
137/* Parameters TLV types */
138#define LLCP_TLV_VERSION 0x1
139#define LLCP_TLV_MIUX 0x2
140#define LLCP_TLV_WKS 0x3
141#define LLCP_TLV_LTO 0x4
142#define LLCP_TLV_RW 0x5
143#define LLCP_TLV_SN 0x6
144#define LLCP_TLV_OPT 0x7
145#define LLCP_TLV_SDREQ 0x8
146#define LLCP_TLV_SDRES 0x9
147#define LLCP_TLV_MAX 0xa
148
149/* Well known LLCP SAP */
150#define LLCP_SAP_SDP 0x1
151#define LLCP_SAP_IP 0x2
152#define LLCP_SAP_OBEX 0x3
153#define LLCP_SAP_SNEP 0x4
154#define LLCP_SAP_MAX 0xff
155
156/* Disconnection reason code */
157#define LLCP_DM_DISC 0x00
158#define LLCP_DM_NOCONN 0x01
159#define LLCP_DM_NOBOUND 0x02
160#define LLCP_DM_REJ 0x03
161
162
163struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
164u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
165 struct nfc_llcp_sock *sock);
166u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
167void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
168
169/* Sock API */
170struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp);
171void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
172void nfc_llcp_accept_unlink(struct sock *sk);
173void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk);
174struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock);
175
176/* TLV API */
177int nfc_llcp_parse_tlv(struct nfc_llcp_local *local,
178 u8 *tlv_array, u16 tlv_array_len);
179
180/* Commands API */
181void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
182u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length);
183void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
184int nfc_llcp_disconnect(struct nfc_llcp_sock *sock);
185int nfc_llcp_send_symm(struct nfc_dev *dev);
186int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
187int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
188int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
189int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
190
191/* Socket API */
192int __init nfc_llcp_sock_init(void);
193void nfc_llcp_sock_exit(void);