1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * Copyright (C) 2011 Intel Corporation. All rights reserved. |
4 | */ |
5 | |
6 | enum llcp_state { |
7 | LLCP_CONNECTED = 1, /* wait_for_packet() wants that */ |
8 | LLCP_CONNECTING, |
9 | LLCP_CLOSED, |
10 | LLCP_BOUND, |
11 | LLCP_LISTEN, |
12 | }; |
13 | |
14 | #define LLCP_DEFAULT_LTO 100 |
15 | #define LLCP_DEFAULT_RW 1 |
16 | #define LLCP_DEFAULT_MIU 128 |
17 | |
18 | #define LLCP_MAX_LTO 0xff |
19 | #define LLCP_MAX_RW 15 |
20 | #define LLCP_MAX_MIUX 0x7ff |
21 | #define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128) |
22 | |
23 | #define LLCP_WKS_NUM_SAP 16 |
24 | #define LLCP_SDP_NUM_SAP 16 |
25 | #define LLCP_LOCAL_NUM_SAP 32 |
26 | #define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP) |
27 | #define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP) |
28 | #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1) |
29 | |
30 | struct nfc_llcp_sock; |
31 | |
32 | struct llcp_sock_list { |
33 | struct hlist_head head; |
34 | rwlock_t lock; |
35 | }; |
36 | |
37 | struct nfc_llcp_sdp_tlv { |
38 | u8 *tlv; |
39 | u8 tlv_len; |
40 | |
41 | char *uri; |
42 | u8 tid; |
43 | u8 sap; |
44 | |
45 | unsigned long time; |
46 | |
47 | struct hlist_node node; |
48 | }; |
49 | |
50 | struct nfc_llcp_local { |
51 | struct list_head list; |
52 | struct nfc_dev *dev; |
53 | |
54 | struct kref ref; |
55 | |
56 | struct mutex sdp_lock; |
57 | |
58 | struct timer_list link_timer; |
59 | struct sk_buff_head tx_queue; |
60 | struct work_struct tx_work; |
61 | struct work_struct rx_work; |
62 | struct sk_buff *rx_pending; |
63 | struct work_struct timeout_work; |
64 | |
65 | u32 target_idx; |
66 | u8 rf_mode; |
67 | u8 comm_mode; |
68 | u8 lto; |
69 | u8 rw; |
70 | __be16 miux; |
71 | unsigned long local_wks; /* Well known services */ |
72 | unsigned long local_sdp; /* Local services */ |
73 | unsigned long local_sap; /* Local SAPs, not available for discovery */ |
74 | atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP]; |
75 | |
76 | /* local */ |
77 | u8 gb[NFC_MAX_GT_LEN]; |
78 | u8 gb_len; |
79 | |
80 | /* remote */ |
81 | u8 remote_gb[NFC_MAX_GT_LEN]; |
82 | u8 remote_gb_len; |
83 | |
84 | u8 remote_version; |
85 | u16 remote_miu; |
86 | u16 remote_lto; |
87 | u8 remote_opt; |
88 | u16 remote_wks; |
89 | |
90 | struct mutex sdreq_lock; |
91 | struct hlist_head pending_sdreqs; |
92 | struct timer_list sdreq_timer; |
93 | struct work_struct sdreq_timeout_work; |
94 | u8 sdreq_next_tid; |
95 | |
96 | /* sockets array */ |
97 | struct llcp_sock_list sockets; |
98 | struct llcp_sock_list connecting_sockets; |
99 | struct llcp_sock_list raw_sockets; |
100 | }; |
101 | |
102 | struct nfc_llcp_sock { |
103 | struct sock sk; |
104 | struct nfc_dev *dev; |
105 | struct nfc_llcp_local *local; |
106 | u32 target_idx; |
107 | u32 nfc_protocol; |
108 | |
109 | /* Link parameters */ |
110 | u8 ssap; |
111 | u8 dsap; |
112 | char *service_name; |
113 | size_t service_name_len; |
114 | u8 rw; |
115 | __be16 miux; |
116 | |
117 | |
118 | /* Remote link parameters */ |
119 | u8 remote_rw; |
120 | u16 remote_miu; |
121 | |
122 | /* Link variables */ |
123 | u8 send_n; |
124 | u8 send_ack_n; |
125 | u8 recv_n; |
126 | u8 recv_ack_n; |
127 | |
128 | /* Is the remote peer ready to receive */ |
129 | u8 remote_ready; |
130 | |
131 | /* Reserved source SAP */ |
132 | u8 reserved_ssap; |
133 | |
134 | struct sk_buff_head tx_queue; |
135 | struct sk_buff_head tx_pending_queue; |
136 | |
137 | struct list_head accept_queue; |
138 | struct sock *parent; |
139 | }; |
140 | |
141 | struct nfc_llcp_ui_cb { |
142 | __u8 dsap; |
143 | __u8 ssap; |
144 | }; |
145 | |
146 | #define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0])) |
147 | |
148 | #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk)) |
149 | #define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev) |
150 | |
151 | #define 2 |
152 | #define LLCP_SEQUENCE_SIZE 1 |
153 | #define 2 |
154 | |
155 | /* LLCP versions: 1.1 is 1.0 plus SDP */ |
156 | #define LLCP_VERSION_10 0x10 |
157 | #define LLCP_VERSION_11 0x11 |
158 | |
159 | /* LLCP PDU types */ |
160 | #define LLCP_PDU_SYMM 0x0 |
161 | #define LLCP_PDU_PAX 0x1 |
162 | #define LLCP_PDU_AGF 0x2 |
163 | #define LLCP_PDU_UI 0x3 |
164 | #define LLCP_PDU_CONNECT 0x4 |
165 | #define LLCP_PDU_DISC 0x5 |
166 | #define LLCP_PDU_CC 0x6 |
167 | #define LLCP_PDU_DM 0x7 |
168 | #define LLCP_PDU_FRMR 0x8 |
169 | #define LLCP_PDU_SNL 0x9 |
170 | #define LLCP_PDU_I 0xc |
171 | #define LLCP_PDU_RR 0xd |
172 | #define LLCP_PDU_RNR 0xe |
173 | |
174 | /* Parameters TLV types */ |
175 | #define LLCP_TLV_VERSION 0x1 |
176 | #define LLCP_TLV_MIUX 0x2 |
177 | #define LLCP_TLV_WKS 0x3 |
178 | #define LLCP_TLV_LTO 0x4 |
179 | #define LLCP_TLV_RW 0x5 |
180 | #define LLCP_TLV_SN 0x6 |
181 | #define LLCP_TLV_OPT 0x7 |
182 | #define LLCP_TLV_SDREQ 0x8 |
183 | #define LLCP_TLV_SDRES 0x9 |
184 | #define LLCP_TLV_MAX 0xa |
185 | |
186 | /* Well known LLCP SAP */ |
187 | #define LLCP_SAP_SDP 0x1 |
188 | #define LLCP_SAP_IP 0x2 |
189 | #define LLCP_SAP_OBEX 0x3 |
190 | #define LLCP_SAP_SNEP 0x4 |
191 | #define LLCP_SAP_MAX 0xff |
192 | |
193 | /* Disconnection reason code */ |
194 | #define LLCP_DM_DISC 0x00 |
195 | #define LLCP_DM_NOCONN 0x01 |
196 | #define LLCP_DM_NOBOUND 0x02 |
197 | #define LLCP_DM_REJ 0x03 |
198 | |
199 | |
200 | void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s); |
201 | void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s); |
202 | void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock); |
203 | struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); |
204 | int nfc_llcp_local_put(struct nfc_llcp_local *local); |
205 | u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
206 | struct nfc_llcp_sock *sock); |
207 | u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local); |
208 | void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap); |
209 | int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock); |
210 | void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, |
211 | struct sk_buff *skb, u8 direction); |
212 | |
213 | /* Sock API */ |
214 | struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern); |
215 | void nfc_llcp_sock_free(struct nfc_llcp_sock *sock); |
216 | void nfc_llcp_accept_unlink(struct sock *sk); |
217 | void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk); |
218 | struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock); |
219 | |
220 | /* TLV API */ |
221 | int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local, |
222 | const u8 *tlv_array, u16 tlv_array_len); |
223 | int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock, |
224 | const u8 *tlv_array, u16 tlv_array_len); |
225 | |
226 | /* Commands API */ |
227 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); |
228 | u8 *nfc_llcp_build_tlv(u8 type, const u8 *value, u8 value_length, u8 *tlv_length); |
229 | struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap); |
230 | struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, const char *uri, |
231 | size_t uri_len); |
232 | void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp); |
233 | void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head); |
234 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); |
235 | int nfc_llcp_send_symm(struct nfc_dev *dev); |
236 | int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); |
237 | int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); |
238 | int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local, |
239 | struct hlist_head *tlv_list, size_t tlvs_len); |
240 | int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local, |
241 | struct hlist_head *tlv_list, size_t tlvs_len); |
242 | int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); |
243 | int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); |
244 | int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, |
245 | struct msghdr *msg, size_t len); |
246 | int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, |
247 | struct msghdr *msg, size_t len); |
248 | int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); |
249 | |
250 | /* Socket API */ |
251 | int __init nfc_llcp_sock_init(void); |
252 | void nfc_llcp_sock_exit(void); |
253 | |