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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 | |
98b32dec | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
d646960f SO |
16 | */ |
17 | ||
18 | enum llcp_state { | |
19 | LLCP_CONNECTED = 1, /* wait_for_packet() wants that */ | |
b4011239 | 20 | LLCP_CONNECTING, |
17f7ae16 | 21 | LLCP_DISCONNECTING, |
d646960f SO |
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 | |
66cbfa10 | 34 | #define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128) |
eda21f16 | 35 | |
d646960f SO |
36 | #define LLCP_WKS_NUM_SAP 16 |
37 | #define LLCP_SDP_NUM_SAP 16 | |
38 | #define LLCP_LOCAL_NUM_SAP 32 | |
39 | #define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP) | |
40 | #define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP) | |
8f50020e | 41 | #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1) |
d646960f SO |
42 | |
43 | struct nfc_llcp_sock; | |
44 | ||
a69f32af SO |
45 | struct llcp_sock_list { |
46 | struct hlist_head head; | |
47 | rwlock_t lock; | |
48 | }; | |
49 | ||
e0ae7bac TE |
50 | struct nfc_llcp_sdp_tlv { |
51 | u8 *tlv; | |
52 | u8 tlv_len; | |
53 | ||
54 | char *uri; | |
55 | u8 tid; | |
56 | u8 sap; | |
57 | ||
40213fa8 TE |
58 | unsigned long time; |
59 | ||
e0ae7bac TE |
60 | struct hlist_node node; |
61 | }; | |
62 | ||
d646960f SO |
63 | struct nfc_llcp_local { |
64 | struct list_head list; | |
65 | struct nfc_dev *dev; | |
66 | ||
c7aa1225 SO |
67 | struct kref ref; |
68 | ||
d646960f | 69 | struct mutex sdp_lock; |
d646960f SO |
70 | |
71 | struct timer_list link_timer; | |
72 | struct sk_buff_head tx_queue; | |
d646960f | 73 | struct work_struct tx_work; |
d646960f SO |
74 | struct work_struct rx_work; |
75 | struct sk_buff *rx_pending; | |
d646960f SO |
76 | struct work_struct timeout_work; |
77 | ||
78 | u32 target_idx; | |
79 | u8 rf_mode; | |
80 | u8 comm_mode; | |
52feb444 TE |
81 | u8 lto; |
82 | u8 rw; | |
83 | __be16 miux; | |
d646960f SO |
84 | unsigned long local_wks; /* Well known services */ |
85 | unsigned long local_sdp; /* Local services */ | |
86 | unsigned long local_sap; /* Local SAPs, not available for discovery */ | |
8f50020e | 87 | atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP]; |
d646960f SO |
88 | |
89 | /* local */ | |
90 | u8 gb[NFC_MAX_GT_LEN]; | |
91 | u8 gb_len; | |
92 | ||
93 | /* remote */ | |
94 | u8 remote_gb[NFC_MAX_GT_LEN]; | |
95 | u8 remote_gb_len; | |
96 | ||
97 | u8 remote_version; | |
98 | u16 remote_miu; | |
99 | u16 remote_lto; | |
100 | u8 remote_opt; | |
101 | u16 remote_wks; | |
d646960f | 102 | |
d9b8d8e1 TE |
103 | struct mutex sdreq_lock; |
104 | struct hlist_head pending_sdreqs; | |
40213fa8 TE |
105 | struct timer_list sdreq_timer; |
106 | struct work_struct sdreq_timeout_work; | |
d9b8d8e1 TE |
107 | u8 sdreq_next_tid; |
108 | ||
d646960f | 109 | /* sockets array */ |
a69f32af SO |
110 | struct llcp_sock_list sockets; |
111 | struct llcp_sock_list connecting_sockets; | |
4463523b | 112 | struct llcp_sock_list raw_sockets; |
d646960f SO |
113 | }; |
114 | ||
115 | struct nfc_llcp_sock { | |
116 | struct sock sk; | |
d646960f SO |
117 | struct nfc_dev *dev; |
118 | struct nfc_llcp_local *local; | |
119 | u32 target_idx; | |
120 | u32 nfc_protocol; | |
121 | ||
7a06e586 | 122 | /* Link parameters */ |
d646960f SO |
123 | u8 ssap; |
124 | u8 dsap; | |
125 | char *service_name; | |
126 | size_t service_name_len; | |
26fd76ca | 127 | u8 rw; |
5eef6669 | 128 | __be16 miux; |
26fd76ca | 129 | |
e4306bec SO |
130 | |
131 | /* Remote link parameters */ | |
132 | u8 remote_rw; | |
133 | u16 remote_miu; | |
d646960f SO |
134 | |
135 | /* Link variables */ | |
136 | u8 send_n; | |
137 | u8 send_ack_n; | |
138 | u8 recv_n; | |
139 | u8 recv_ack_n; | |
140 | ||
141 | /* Is the remote peer ready to receive */ | |
142 | u8 remote_ready; | |
143 | ||
cbbf4721 SO |
144 | /* Reserved source SAP */ |
145 | u8 reserved_ssap; | |
146 | ||
d646960f SO |
147 | struct sk_buff_head tx_queue; |
148 | struct sk_buff_head tx_pending_queue; | |
d646960f SO |
149 | |
150 | struct list_head accept_queue; | |
151 | struct sock *parent; | |
152 | }; | |
153 | ||
968272bf SO |
154 | struct nfc_llcp_ui_cb { |
155 | __u8 dsap; | |
156 | __u8 ssap; | |
157 | }; | |
158 | ||
159 | #define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0])) | |
160 | ||
d646960f SO |
161 | #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk)) |
162 | #define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev) | |
163 | ||
164 | #define LLCP_HEADER_SIZE 2 | |
165 | #define LLCP_SEQUENCE_SIZE 1 | |
098dafcf | 166 | #define LLCP_AGF_PDU_HEADER_SIZE 2 |
d646960f SO |
167 | |
168 | /* LLCP versions: 1.1 is 1.0 plus SDP */ | |
169 | #define LLCP_VERSION_10 0x10 | |
170 | #define LLCP_VERSION_11 0x11 | |
171 | ||
172 | /* LLCP PDU types */ | |
173 | #define LLCP_PDU_SYMM 0x0 | |
174 | #define LLCP_PDU_PAX 0x1 | |
175 | #define LLCP_PDU_AGF 0x2 | |
176 | #define LLCP_PDU_UI 0x3 | |
177 | #define LLCP_PDU_CONNECT 0x4 | |
178 | #define LLCP_PDU_DISC 0x5 | |
179 | #define LLCP_PDU_CC 0x6 | |
180 | #define LLCP_PDU_DM 0x7 | |
181 | #define LLCP_PDU_FRMR 0x8 | |
182 | #define LLCP_PDU_SNL 0x9 | |
183 | #define LLCP_PDU_I 0xc | |
184 | #define LLCP_PDU_RR 0xd | |
185 | #define LLCP_PDU_RNR 0xe | |
186 | ||
187 | /* Parameters TLV types */ | |
188 | #define LLCP_TLV_VERSION 0x1 | |
189 | #define LLCP_TLV_MIUX 0x2 | |
190 | #define LLCP_TLV_WKS 0x3 | |
191 | #define LLCP_TLV_LTO 0x4 | |
192 | #define LLCP_TLV_RW 0x5 | |
193 | #define LLCP_TLV_SN 0x6 | |
194 | #define LLCP_TLV_OPT 0x7 | |
195 | #define LLCP_TLV_SDREQ 0x8 | |
196 | #define LLCP_TLV_SDRES 0x9 | |
197 | #define LLCP_TLV_MAX 0xa | |
198 | ||
199 | /* Well known LLCP SAP */ | |
200 | #define LLCP_SAP_SDP 0x1 | |
201 | #define LLCP_SAP_IP 0x2 | |
202 | #define LLCP_SAP_OBEX 0x3 | |
203 | #define LLCP_SAP_SNEP 0x4 | |
204 | #define LLCP_SAP_MAX 0xff | |
205 | ||
206 | /* Disconnection reason code */ | |
207 | #define LLCP_DM_DISC 0x00 | |
208 | #define LLCP_DM_NOCONN 0x01 | |
209 | #define LLCP_DM_NOBOUND 0x02 | |
210 | #define LLCP_DM_REJ 0x03 | |
211 | ||
212 | ||
a69f32af SO |
213 | void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s); |
214 | void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s); | |
abd18d43 | 215 | void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock); |
d646960f | 216 | struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); |
c7aa1225 SO |
217 | struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local); |
218 | int nfc_llcp_local_put(struct nfc_llcp_local *local); | |
d646960f | 219 | u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
427a2eb1 | 220 | struct nfc_llcp_sock *sock); |
d646960f SO |
221 | u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local); |
222 | void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap); | |
d094afa1 | 223 | int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock); |
4463523b TE |
224 | void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, |
225 | struct sk_buff *skb, u8 direction); | |
d646960f SO |
226 | |
227 | /* Sock API */ | |
11aa9c28 | 228 | struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern); |
d646960f SO |
229 | void nfc_llcp_sock_free(struct nfc_llcp_sock *sock); |
230 | void nfc_llcp_accept_unlink(struct sock *sk); | |
231 | void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk); | |
232 | struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock); | |
233 | ||
234 | /* TLV API */ | |
7a06e586 SO |
235 | int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local, |
236 | u8 *tlv_array, u16 tlv_array_len); | |
237 | int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock, | |
238 | u8 *tlv_array, u16 tlv_array_len); | |
d646960f SO |
239 | |
240 | /* Commands API */ | |
241 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); | |
242 | u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length); | |
e0ae7bac | 243 | struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap); |
d9b8d8e1 TE |
244 | struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri, |
245 | size_t uri_len); | |
e0ae7bac | 246 | void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp); |
d9b8d8e1 | 247 | void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head); |
d646960f | 248 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); |
d646960f SO |
249 | int nfc_llcp_send_symm(struct nfc_dev *dev); |
250 | int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); | |
251 | int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); | |
e0ae7bac TE |
252 | int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local, |
253 | struct hlist_head *tlv_list, size_t tlvs_len); | |
d9b8d8e1 TE |
254 | int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local, |
255 | struct hlist_head *tlv_list, size_t tlvs_len); | |
d646960f SO |
256 | int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); |
257 | int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); | |
53a0ac2e | 258 | int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, |
427a2eb1 | 259 | struct msghdr *msg, size_t len); |
94f418a2 SO |
260 | int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, |
261 | struct msghdr *msg, size_t len); | |
d094afa1 | 262 | int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); |
d646960f SO |
263 | |
264 | /* Socket API */ | |
265 | int __init nfc_llcp_sock_init(void); | |
266 | void nfc_llcp_sock_exit(void); |