Commit | Line | Data |
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1ccea77e | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
d646960f SO |
2 | /* |
3 | * Copyright (C) 2011 Intel Corporation. All rights reserved. | |
d646960f SO |
4 | */ |
5 | ||
6 | enum llcp_state { | |
7 | LLCP_CONNECTED = 1, /* wait_for_packet() wants that */ | |
b4011239 | 8 | LLCP_CONNECTING, |
d646960f SO |
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 | ||
eda21f16 SO |
18 | #define LLCP_MAX_LTO 0xff |
19 | #define LLCP_MAX_RW 15 | |
20 | #define LLCP_MAX_MIUX 0x7ff | |
66cbfa10 | 21 | #define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128) |
eda21f16 | 22 | |
d646960f SO |
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) | |
8f50020e | 28 | #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1) |
d646960f SO |
29 | |
30 | struct nfc_llcp_sock; | |
31 | ||
a69f32af SO |
32 | struct llcp_sock_list { |
33 | struct hlist_head head; | |
34 | rwlock_t lock; | |
35 | }; | |
36 | ||
e0ae7bac TE |
37 | struct nfc_llcp_sdp_tlv { |
38 | u8 *tlv; | |
39 | u8 tlv_len; | |
40 | ||
41 | char *uri; | |
42 | u8 tid; | |
43 | u8 sap; | |
44 | ||
40213fa8 TE |
45 | unsigned long time; |
46 | ||
e0ae7bac TE |
47 | struct hlist_node node; |
48 | }; | |
49 | ||
d646960f SO |
50 | struct nfc_llcp_local { |
51 | struct list_head list; | |
52 | struct nfc_dev *dev; | |
53 | ||
c7aa1225 SO |
54 | struct kref ref; |
55 | ||
d646960f | 56 | struct mutex sdp_lock; |
d646960f SO |
57 | |
58 | struct timer_list link_timer; | |
59 | struct sk_buff_head tx_queue; | |
d646960f | 60 | struct work_struct tx_work; |
d646960f SO |
61 | struct work_struct rx_work; |
62 | struct sk_buff *rx_pending; | |
d646960f SO |
63 | struct work_struct timeout_work; |
64 | ||
65 | u32 target_idx; | |
66 | u8 rf_mode; | |
67 | u8 comm_mode; | |
52feb444 TE |
68 | u8 lto; |
69 | u8 rw; | |
70 | __be16 miux; | |
d646960f SO |
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 */ | |
8f50020e | 74 | atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP]; |
d646960f SO |
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; | |
d646960f | 89 | |
d9b8d8e1 TE |
90 | struct mutex sdreq_lock; |
91 | struct hlist_head pending_sdreqs; | |
40213fa8 TE |
92 | struct timer_list sdreq_timer; |
93 | struct work_struct sdreq_timeout_work; | |
d9b8d8e1 TE |
94 | u8 sdreq_next_tid; |
95 | ||
d646960f | 96 | /* sockets array */ |
a69f32af SO |
97 | struct llcp_sock_list sockets; |
98 | struct llcp_sock_list connecting_sockets; | |
4463523b | 99 | struct llcp_sock_list raw_sockets; |
d646960f SO |
100 | }; |
101 | ||
102 | struct nfc_llcp_sock { | |
103 | struct sock sk; | |
d646960f SO |
104 | struct nfc_dev *dev; |
105 | struct nfc_llcp_local *local; | |
106 | u32 target_idx; | |
107 | u32 nfc_protocol; | |
108 | ||
7a06e586 | 109 | /* Link parameters */ |
d646960f SO |
110 | u8 ssap; |
111 | u8 dsap; | |
112 | char *service_name; | |
113 | size_t service_name_len; | |
26fd76ca | 114 | u8 rw; |
5eef6669 | 115 | __be16 miux; |
26fd76ca | 116 | |
e4306bec SO |
117 | |
118 | /* Remote link parameters */ | |
119 | u8 remote_rw; | |
120 | u16 remote_miu; | |
d646960f SO |
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 | ||
cbbf4721 SO |
131 | /* Reserved source SAP */ |
132 | u8 reserved_ssap; | |
133 | ||
d646960f SO |
134 | struct sk_buff_head tx_queue; |
135 | struct sk_buff_head tx_pending_queue; | |
d646960f SO |
136 | |
137 | struct list_head accept_queue; | |
138 | struct sock *parent; | |
139 | }; | |
140 | ||
968272bf SO |
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 | ||
d646960f SO |
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 LLCP_HEADER_SIZE 2 | |
152 | #define LLCP_SEQUENCE_SIZE 1 | |
098dafcf | 153 | #define LLCP_AGF_PDU_HEADER_SIZE 2 |
d646960f SO |
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 | ||
a69f32af SO |
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); | |
abd18d43 | 202 | void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock); |
d646960f | 203 | struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); |
c7aa1225 SO |
204 | struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local); |
205 | int nfc_llcp_local_put(struct nfc_llcp_local *local); | |
d646960f | 206 | u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
427a2eb1 | 207 | struct nfc_llcp_sock *sock); |
d646960f SO |
208 | u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local); |
209 | void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap); | |
d094afa1 | 210 | int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock); |
4463523b TE |
211 | void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, |
212 | struct sk_buff *skb, u8 direction); | |
d646960f SO |
213 | |
214 | /* Sock API */ | |
11aa9c28 | 215 | struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern); |
d646960f SO |
216 | void nfc_llcp_sock_free(struct nfc_llcp_sock *sock); |
217 | void nfc_llcp_accept_unlink(struct sock *sk); | |
218 | void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk); | |
219 | struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock); | |
220 | ||
221 | /* TLV API */ | |
7a06e586 | 222 | int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local, |
3df40eb3 | 223 | const u8 *tlv_array, u16 tlv_array_len); |
7a06e586 | 224 | int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock, |
3df40eb3 | 225 | const u8 *tlv_array, u16 tlv_array_len); |
d646960f SO |
226 | |
227 | /* Commands API */ | |
228 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); | |
3df40eb3 | 229 | u8 *nfc_llcp_build_tlv(u8 type, const u8 *value, u8 value_length, u8 *tlv_length); |
e0ae7bac | 230 | struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap); |
3df40eb3 | 231 | struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, const char *uri, |
d9b8d8e1 | 232 | size_t uri_len); |
e0ae7bac | 233 | void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp); |
d9b8d8e1 | 234 | void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head); |
d646960f | 235 | void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); |
d646960f SO |
236 | int nfc_llcp_send_symm(struct nfc_dev *dev); |
237 | int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); | |
238 | int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); | |
e0ae7bac TE |
239 | int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local, |
240 | struct hlist_head *tlv_list, size_t tlvs_len); | |
d9b8d8e1 TE |
241 | int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local, |
242 | struct hlist_head *tlv_list, size_t tlvs_len); | |
d646960f SO |
243 | int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); |
244 | int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); | |
53a0ac2e | 245 | int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, |
427a2eb1 | 246 | struct msghdr *msg, size_t len); |
94f418a2 SO |
247 | int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, |
248 | struct msghdr *msg, size_t len); | |
d094afa1 | 249 | int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); |
d646960f SO |
250 | |
251 | /* Socket API */ | |
252 | int __init nfc_llcp_sock_init(void); | |
253 | void nfc_llcp_sock_exit(void); |