tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_MAX_LTO 0xff
32#define LLCP_MAX_RW 15
33#define LLCP_MAX_MIUX 0x7ff
34
35#define LLCP_WKS_NUM_SAP 16
36#define LLCP_SDP_NUM_SAP 16
37#define LLCP_LOCAL_NUM_SAP 32
38#define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP)
39#define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP)
40#define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1)
41
42struct nfc_llcp_sock;
43
44struct llcp_sock_list {
45 struct hlist_head head;
46 rwlock_t lock;
47};
48
49struct nfc_llcp_local {
50 struct list_head list;
51 struct nfc_dev *dev;
52
53 struct kref ref;
54
55 struct mutex sdp_lock;
56
57 struct timer_list link_timer;
58 struct sk_buff_head tx_queue;
59 struct work_struct tx_work;
60 struct work_struct rx_work;
61 struct sk_buff *rx_pending;
62 struct work_struct timeout_work;
63
64 u32 target_idx;
65 u8 rf_mode;
66 u8 comm_mode;
67 unsigned long local_wks; /* Well known services */
68 unsigned long local_sdp; /* Local services */
69 unsigned long local_sap; /* Local SAPs, not available for discovery */
70 atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP];
71
72 /* local */
73 u8 gb[NFC_MAX_GT_LEN];
74 u8 gb_len;
75
76 /* remote */
77 u8 remote_gb[NFC_MAX_GT_LEN];
78 u8 remote_gb_len;
79
80 u8 remote_version;
81 u16 remote_miu;
82 u16 remote_lto;
83 u8 remote_opt;
84 u16 remote_wks;
85
86 /* sockets array */
87 struct llcp_sock_list sockets;
88 struct llcp_sock_list connecting_sockets;
89 struct llcp_sock_list raw_sockets;
90};
91
92struct nfc_llcp_sock {
93 struct sock sk;
94 struct nfc_dev *dev;
95 struct nfc_llcp_local *local;
96 u32 target_idx;
97 u32 nfc_protocol;
98
99 /* Link parameters */
100 u8 ssap;
101 u8 dsap;
102 char *service_name;
103 size_t service_name_len;
104 u8 rw;
105 u16 miu;
106
107 /* Link variables */
108 u8 send_n;
109 u8 send_ack_n;
110 u8 recv_n;
111 u8 recv_ack_n;
112
113 /* Is the remote peer ready to receive */
114 u8 remote_ready;
115
116 /* Reserved source SAP */
117 u8 reserved_ssap;
118
119 struct sk_buff_head tx_queue;
120 struct sk_buff_head tx_pending_queue;
121 struct sk_buff_head tx_backlog_queue;
122
123 struct list_head accept_queue;
124 struct sock *parent;
125};
126
127#define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
128#define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev)
129
130#define LLCP_HEADER_SIZE 2
131#define LLCP_SEQUENCE_SIZE 1
132
133/* LLCP versions: 1.1 is 1.0 plus SDP */
134#define LLCP_VERSION_10 0x10
135#define LLCP_VERSION_11 0x11
136
137/* LLCP PDU types */
138#define LLCP_PDU_SYMM 0x0
139#define LLCP_PDU_PAX 0x1
140#define LLCP_PDU_AGF 0x2
141#define LLCP_PDU_UI 0x3
142#define LLCP_PDU_CONNECT 0x4
143#define LLCP_PDU_DISC 0x5
144#define LLCP_PDU_CC 0x6
145#define LLCP_PDU_DM 0x7
146#define LLCP_PDU_FRMR 0x8
147#define LLCP_PDU_SNL 0x9
148#define LLCP_PDU_I 0xc
149#define LLCP_PDU_RR 0xd
150#define LLCP_PDU_RNR 0xe
151
152/* Parameters TLV types */
153#define LLCP_TLV_VERSION 0x1
154#define LLCP_TLV_MIUX 0x2
155#define LLCP_TLV_WKS 0x3
156#define LLCP_TLV_LTO 0x4
157#define LLCP_TLV_RW 0x5
158#define LLCP_TLV_SN 0x6
159#define LLCP_TLV_OPT 0x7
160#define LLCP_TLV_SDREQ 0x8
161#define LLCP_TLV_SDRES 0x9
162#define LLCP_TLV_MAX 0xa
163
164/* Well known LLCP SAP */
165#define LLCP_SAP_SDP 0x1
166#define LLCP_SAP_IP 0x2
167#define LLCP_SAP_OBEX 0x3
168#define LLCP_SAP_SNEP 0x4
169#define LLCP_SAP_MAX 0xff
170
171/* Disconnection reason code */
172#define LLCP_DM_DISC 0x00
173#define LLCP_DM_NOCONN 0x01
174#define LLCP_DM_NOBOUND 0x02
175#define LLCP_DM_REJ 0x03
176
177
178void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s);
179void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s);
180struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
181struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local);
182int nfc_llcp_local_put(struct nfc_llcp_local *local);
183u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
184 struct nfc_llcp_sock *sock);
185u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
186void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
187int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
188void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
189 struct sk_buff *skb, u8 direction);
190
191/* Sock API */
192struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp);
193void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
194void nfc_llcp_accept_unlink(struct sock *sk);
195void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk);
196struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock);
197
198/* TLV API */
199int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
200 u8 *tlv_array, u16 tlv_array_len);
201int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
202 u8 *tlv_array, u16 tlv_array_len);
203
204/* Commands API */
205void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
206u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length);
207void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
208int nfc_llcp_disconnect(struct nfc_llcp_sock *sock);
209int nfc_llcp_send_symm(struct nfc_dev *dev);
210int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
211int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
212int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
213int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
214int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
215 struct msghdr *msg, size_t len);
216int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
217
218/* Socket API */
219int __init nfc_llcp_sock_init(void);
220void nfc_llcp_sock_exit(void);