Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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 | |
Samuel Ortiz | eda21f1 | 2012-03-05 01:03:43 +0100 | [diff] [blame] | 31 | #define LLCP_MAX_LTO 0xff |
| 32 | #define LLCP_MAX_RW 15 |
| 33 | #define LLCP_MAX_MIUX 0x7ff |
| 34 | |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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) |
Samuel Ortiz | 8f50020 | 2012-06-25 15:46:28 +0200 | [diff] [blame] | 40 | #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1) |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 41 | |
| 42 | struct nfc_llcp_sock; |
| 43 | |
Samuel Ortiz | a69f32a | 2012-05-04 17:04:19 +0200 | [diff] [blame] | 44 | struct llcp_sock_list { |
| 45 | struct hlist_head head; |
| 46 | rwlock_t lock; |
| 47 | }; |
| 48 | |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 49 | struct nfc_llcp_local { |
| 50 | struct list_head list; |
| 51 | struct nfc_dev *dev; |
| 52 | |
Samuel Ortiz | c7aa122 | 2012-05-04 11:24:16 +0200 | [diff] [blame] | 53 | struct kref ref; |
| 54 | |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 55 | struct mutex sdp_lock; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 56 | |
| 57 | struct timer_list link_timer; |
| 58 | struct sk_buff_head tx_queue; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 59 | struct work_struct tx_work; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 60 | struct work_struct rx_work; |
| 61 | struct sk_buff *rx_pending; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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 */ |
Samuel Ortiz | 8f50020 | 2012-06-25 15:46:28 +0200 | [diff] [blame] | 70 | atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP]; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 85 | |
| 86 | /* sockets array */ |
Samuel Ortiz | a69f32a | 2012-05-04 17:04:19 +0200 | [diff] [blame] | 87 | struct llcp_sock_list sockets; |
| 88 | struct llcp_sock_list connecting_sockets; |
Thierry Escande | 4463523b | 2012-09-26 18:16:44 +0200 | [diff] [blame] | 89 | struct llcp_sock_list raw_sockets; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | struct nfc_llcp_sock { |
| 93 | struct sock sk; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 94 | struct nfc_dev *dev; |
| 95 | struct nfc_llcp_local *local; |
| 96 | u32 target_idx; |
| 97 | u32 nfc_protocol; |
| 98 | |
Samuel Ortiz | 7a06e58 | 2012-05-07 22:03:34 +0200 | [diff] [blame] | 99 | /* Link parameters */ |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 100 | u8 ssap; |
| 101 | u8 dsap; |
| 102 | char *service_name; |
| 103 | size_t service_name_len; |
Samuel Ortiz | 7a06e58 | 2012-05-07 22:03:34 +0200 | [diff] [blame] | 104 | u8 rw; |
Samuel Ortiz | 93d7e49 | 2012-05-14 17:37:32 +0200 | [diff] [blame] | 105 | u16 miu; |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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 | |
Samuel Ortiz | cbbf472 | 2012-06-22 14:48:11 +0200 | [diff] [blame] | 116 | /* Reserved source SAP */ |
| 117 | u8 reserved_ssap; |
| 118 | |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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 | |
Samuel Ortiz | a69f32a | 2012-05-04 17:04:19 +0200 | [diff] [blame] | 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); |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 180 | struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); |
Samuel Ortiz | c7aa122 | 2012-05-04 11:24:16 +0200 | [diff] [blame] | 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); |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 183 | u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, |
Samuel Ortiz | 427a2eb | 2012-03-05 01:03:52 +0100 | [diff] [blame] | 184 | struct nfc_llcp_sock *sock); |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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); |
Samuel Ortiz | d094afa | 2012-03-05 01:03:42 +0100 | [diff] [blame] | 187 | int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock); |
Thierry Escande | 4463523b | 2012-09-26 18:16:44 +0200 | [diff] [blame] | 188 | void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, |
| 189 | struct sk_buff *skb, u8 direction); |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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 */ |
Samuel Ortiz | 7a06e58 | 2012-05-07 22:03:34 +0200 | [diff] [blame] | 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); |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 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); |
| 212 | int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); |
| 213 | int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); |
Samuel Ortiz | 53a0ac2 | 2012-03-05 01:03:37 +0100 | [diff] [blame] | 214 | int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, |
Samuel Ortiz | 427a2eb | 2012-03-05 01:03:52 +0100 | [diff] [blame] | 215 | struct msghdr *msg, size_t len); |
Samuel Ortiz | d094afa | 2012-03-05 01:03:42 +0100 | [diff] [blame] | 216 | int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); |
Samuel Ortiz | d646960 | 2011-12-14 16:43:12 +0100 | [diff] [blame] | 217 | |
| 218 | /* Socket API */ |
| 219 | int __init nfc_llcp_sock_init(void); |
| 220 | void nfc_llcp_sock_exit(void); |