blob: 7286c86982ffa0ec135376717b902354f0167eb3 [file] [log] [blame]
Samuel Ortizd6469602011-12-14 16:43:12 +01001/*
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
Samuel Ortizeda21f12012-03-05 01:03:43 +010031#define LLCP_MAX_LTO 0xff
32#define LLCP_MAX_RW 15
33#define LLCP_MAX_MIUX 0x7ff
34
Samuel Ortizd6469602011-12-14 16:43:12 +010035#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
41struct nfc_llcp_sock;
42
Samuel Ortiza69f32a2012-05-04 17:04:19 +020043struct llcp_sock_list {
44 struct hlist_head head;
45 rwlock_t lock;
46};
47
Samuel Ortizd6469602011-12-14 16:43:12 +010048struct nfc_llcp_local {
49 struct list_head list;
50 struct nfc_dev *dev;
51
Samuel Ortizc7aa1222012-05-04 11:24:16 +020052 struct kref ref;
53
Samuel Ortizd6469602011-12-14 16:43:12 +010054 struct mutex sdp_lock;
Samuel Ortizd6469602011-12-14 16:43:12 +010055
56 struct timer_list link_timer;
57 struct sk_buff_head tx_queue;
58 struct workqueue_struct *tx_wq;
59 struct work_struct tx_work;
60 struct workqueue_struct *rx_wq;
61 struct work_struct rx_work;
62 struct sk_buff *rx_pending;
63 struct workqueue_struct *timeout_wq;
64 struct work_struct timeout_work;
65
66 u32 target_idx;
67 u8 rf_mode;
68 u8 comm_mode;
69 unsigned long local_wks; /* Well known services */
70 unsigned long local_sdp; /* Local services */
71 unsigned long local_sap; /* Local SAPs, not available for discovery */
72
73 /* local */
74 u8 gb[NFC_MAX_GT_LEN];
75 u8 gb_len;
76
77 /* remote */
78 u8 remote_gb[NFC_MAX_GT_LEN];
79 u8 remote_gb_len;
80
81 u8 remote_version;
82 u16 remote_miu;
83 u16 remote_lto;
84 u8 remote_opt;
85 u16 remote_wks;
Samuel Ortizd6469602011-12-14 16:43:12 +010086
87 /* sockets array */
Samuel Ortiza69f32a2012-05-04 17:04:19 +020088 struct llcp_sock_list sockets;
89 struct llcp_sock_list connecting_sockets;
Samuel Ortizd6469602011-12-14 16:43:12 +010090};
91
92struct nfc_llcp_sock {
93 struct sock sk;
Samuel Ortizd6469602011-12-14 16:43:12 +010094 struct nfc_dev *dev;
95 struct nfc_llcp_local *local;
96 u32 target_idx;
97 u32 nfc_protocol;
98
Samuel Ortiz7a06e582012-05-07 22:03:34 +020099 /* Link parameters */
Samuel Ortizd6469602011-12-14 16:43:12 +0100100 u8 ssap;
101 u8 dsap;
102 char *service_name;
103 size_t service_name_len;
Samuel Ortiz7a06e582012-05-07 22:03:34 +0200104 u8 rw;
Samuel Ortiz93d7e492012-05-14 17:37:32 +0200105 u16 miu;
Samuel Ortizd6469602011-12-14 16:43:12 +0100106
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 struct sk_buff_head tx_queue;
117 struct sk_buff_head tx_pending_queue;
118 struct sk_buff_head tx_backlog_queue;
119
120 struct list_head accept_queue;
121 struct sock *parent;
122};
123
124#define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
125#define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev)
126
127#define LLCP_HEADER_SIZE 2
128#define LLCP_SEQUENCE_SIZE 1
129
130/* LLCP versions: 1.1 is 1.0 plus SDP */
131#define LLCP_VERSION_10 0x10
132#define LLCP_VERSION_11 0x11
133
134/* LLCP PDU types */
135#define LLCP_PDU_SYMM 0x0
136#define LLCP_PDU_PAX 0x1
137#define LLCP_PDU_AGF 0x2
138#define LLCP_PDU_UI 0x3
139#define LLCP_PDU_CONNECT 0x4
140#define LLCP_PDU_DISC 0x5
141#define LLCP_PDU_CC 0x6
142#define LLCP_PDU_DM 0x7
143#define LLCP_PDU_FRMR 0x8
144#define LLCP_PDU_SNL 0x9
145#define LLCP_PDU_I 0xc
146#define LLCP_PDU_RR 0xd
147#define LLCP_PDU_RNR 0xe
148
149/* Parameters TLV types */
150#define LLCP_TLV_VERSION 0x1
151#define LLCP_TLV_MIUX 0x2
152#define LLCP_TLV_WKS 0x3
153#define LLCP_TLV_LTO 0x4
154#define LLCP_TLV_RW 0x5
155#define LLCP_TLV_SN 0x6
156#define LLCP_TLV_OPT 0x7
157#define LLCP_TLV_SDREQ 0x8
158#define LLCP_TLV_SDRES 0x9
159#define LLCP_TLV_MAX 0xa
160
161/* Well known LLCP SAP */
162#define LLCP_SAP_SDP 0x1
163#define LLCP_SAP_IP 0x2
164#define LLCP_SAP_OBEX 0x3
165#define LLCP_SAP_SNEP 0x4
166#define LLCP_SAP_MAX 0xff
167
168/* Disconnection reason code */
169#define LLCP_DM_DISC 0x00
170#define LLCP_DM_NOCONN 0x01
171#define LLCP_DM_NOBOUND 0x02
172#define LLCP_DM_REJ 0x03
173
174
Samuel Ortiza69f32a2012-05-04 17:04:19 +0200175void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s);
176void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s);
Samuel Ortizd6469602011-12-14 16:43:12 +0100177struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
Samuel Ortizc7aa1222012-05-04 11:24:16 +0200178struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local);
179int nfc_llcp_local_put(struct nfc_llcp_local *local);
Samuel Ortizd6469602011-12-14 16:43:12 +0100180u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
Samuel Ortiz427a2eb2012-03-05 01:03:52 +0100181 struct nfc_llcp_sock *sock);
Samuel Ortizd6469602011-12-14 16:43:12 +0100182u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
183void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
Samuel Ortizd094afa2012-03-05 01:03:42 +0100184int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
Samuel Ortizd6469602011-12-14 16:43:12 +0100185
186/* Sock API */
187struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp);
188void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
189void nfc_llcp_accept_unlink(struct sock *sk);
190void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk);
191struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock);
192
193/* TLV API */
Samuel Ortiz7a06e582012-05-07 22:03:34 +0200194int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
195 u8 *tlv_array, u16 tlv_array_len);
196int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
197 u8 *tlv_array, u16 tlv_array_len);
Samuel Ortizd6469602011-12-14 16:43:12 +0100198
199/* Commands API */
200void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
201u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length);
202void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
203int nfc_llcp_disconnect(struct nfc_llcp_sock *sock);
204int nfc_llcp_send_symm(struct nfc_dev *dev);
205int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
206int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
207int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
208int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
Samuel Ortiz53a0ac22012-03-05 01:03:37 +0100209int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
Samuel Ortiz427a2eb2012-03-05 01:03:52 +0100210 struct msghdr *msg, size_t len);
Samuel Ortizd094afa2012-03-05 01:03:42 +0100211int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
Samuel Ortizd6469602011-12-14 16:43:12 +0100212
213/* Socket API */
214int __init nfc_llcp_sock_init(void);
215void nfc_llcp_sock_exit(void);