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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 */ | |
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 | ||
eda21f16 SO |
31 | #define LLCP_MAX_LTO 0xff |
32 | #define LLCP_MAX_RW 15 | |
33 | #define LLCP_MAX_MIUX 0x7ff | |
34 | ||
d646960f SO |
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) | |
8f50020e | 40 | #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1) |
d646960f SO |
41 | |
42 | struct nfc_llcp_sock; | |
43 | ||
a69f32af SO |
44 | struct llcp_sock_list { |
45 | struct hlist_head head; | |
46 | rwlock_t lock; | |
47 | }; | |
48 | ||
d646960f SO |
49 | struct nfc_llcp_local { |
50 | struct list_head list; | |
51 | struct nfc_dev *dev; | |
52 | ||
c7aa1225 SO |
53 | struct kref ref; |
54 | ||
d646960f | 55 | struct mutex sdp_lock; |
d646960f SO |
56 | |
57 | struct timer_list link_timer; | |
58 | struct sk_buff_head tx_queue; | |
d646960f | 59 | struct work_struct tx_work; |
d646960f SO |
60 | struct work_struct rx_work; |
61 | struct sk_buff *rx_pending; | |
d646960f SO |
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 */ | |
8f50020e | 70 | atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP]; |
d646960f SO |
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; | |
d646960f SO |
85 | |
86 | /* sockets array */ | |
a69f32af SO |
87 | struct llcp_sock_list sockets; |
88 | struct llcp_sock_list connecting_sockets; | |
4463523b | 89 | struct llcp_sock_list raw_sockets; |
d646960f SO |
90 | }; |
91 | ||
92 | struct nfc_llcp_sock { | |
93 | struct sock sk; | |
d646960f SO |
94 | struct nfc_dev *dev; |
95 | struct nfc_llcp_local *local; | |
96 | u32 target_idx; | |
97 | u32 nfc_protocol; | |
98 | ||
7a06e586 | 99 | /* Link parameters */ |
d646960f SO |
100 | u8 ssap; |
101 | u8 dsap; | |
102 | char *service_name; | |
103 | size_t service_name_len; | |
7a06e586 | 104 | u8 rw; |
93d7e490 | 105 | u16 miu; |
d646960f SO |
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 | ||
cbbf4721 SO |
116 | /* Reserved source SAP */ |
117 | u8 reserved_ssap; | |
118 | ||
d646960f SO |
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 | ||
a69f32af SO |
178 | void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s); |
179 | void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s); | |
d646960f | 180 | struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); |
c7aa1225 SO |
181 | struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local); |
182 | int nfc_llcp_local_put(struct nfc_llcp_local *local); | |
d646960f | 183 | u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
427a2eb1 | 184 | struct nfc_llcp_sock *sock); |
d646960f SO |
185 | u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local); |
186 | void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap); | |
d094afa1 | 187 | int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock); |
4463523b TE |
188 | void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, |
189 | struct sk_buff *skb, u8 direction); | |
d646960f SO |
190 | |
191 | /* Sock API */ | |
192 | struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp); | |
193 | void nfc_llcp_sock_free(struct nfc_llcp_sock *sock); | |
194 | void nfc_llcp_accept_unlink(struct sock *sk); | |
195 | void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk); | |
196 | struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock); | |
197 | ||
198 | /* TLV API */ | |
7a06e586 SO |
199 | int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local, |
200 | u8 *tlv_array, u16 tlv_array_len); | |
201 | int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock, | |
202 | u8 *tlv_array, u16 tlv_array_len); | |
d646960f SO |
203 | |
204 | /* Commands API */ | |
205 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); | |
206 | u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length); | |
207 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); | |
208 | int nfc_llcp_disconnect(struct nfc_llcp_sock *sock); | |
209 | int nfc_llcp_send_symm(struct nfc_dev *dev); | |
210 | int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); | |
211 | int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); | |
c43bb03d | 212 | int nfc_llcp_send_snl(struct nfc_llcp_local *local, u8 tid, u8 sap); |
d646960f SO |
213 | int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); |
214 | int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); | |
53a0ac2e | 215 | int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, |
427a2eb1 | 216 | struct msghdr *msg, size_t len); |
d094afa1 | 217 | int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); |
d646960f SO |
218 | |
219 | /* Socket API */ | |
220 | int __init nfc_llcp_sock_init(void); | |
221 | void nfc_llcp_sock_exit(void); |