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 31 #define LLCP_WKS_NUM_SAP 16 32 #define LLCP_SDP_NUM_SAP 16 33 #define LLCP_LOCAL_NUM_SAP 32 34 #define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP) 35 #define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP) 36 37 struct nfc_llcp_sock; 38 39 struct nfc_llcp_local { 40 struct list_head list; 41 struct nfc_dev *dev; 42 43 struct mutex sdp_lock; 44 struct mutex socket_lock; 45 46 struct timer_list link_timer; 47 struct sk_buff_head tx_queue; 48 struct workqueue_struct *tx_wq; 49 struct work_struct tx_work; 50 struct workqueue_struct *rx_wq; 51 struct work_struct rx_work; 52 struct sk_buff *rx_pending; 53 struct workqueue_struct *timeout_wq; 54 struct work_struct timeout_work; 55 56 u32 target_idx; 57 u8 rf_mode; 58 u8 comm_mode; 59 unsigned long local_wks; /* Well known services */ 60 unsigned long local_sdp; /* Local services */ 61 unsigned long local_sap; /* Local SAPs, not available for discovery */ 62 63 /* local */ 64 u8 gb[NFC_MAX_GT_LEN]; 65 u8 gb_len; 66 67 /* remote */ 68 u8 remote_gb[NFC_MAX_GT_LEN]; 69 u8 remote_gb_len; 70 71 u8 remote_version; 72 u16 remote_miu; 73 u16 remote_lto; 74 u8 remote_opt; 75 u16 remote_wks; 76 u8 remote_rw; 77 78 /* sockets array */ 79 struct nfc_llcp_sock *sockets[LLCP_MAX_SAP]; 80 }; 81 82 struct nfc_llcp_sock { 83 struct sock sk; 84 struct list_head list; 85 struct nfc_dev *dev; 86 struct nfc_llcp_local *local; 87 u32 target_idx; 88 u32 nfc_protocol; 89 90 u8 ssap; 91 u8 dsap; 92 char *service_name; 93 size_t service_name_len; 94 95 /* Link variables */ 96 u8 send_n; 97 u8 send_ack_n; 98 u8 recv_n; 99 u8 recv_ack_n; 100 101 /* Is the remote peer ready to receive */ 102 u8 remote_ready; 103 104 struct sk_buff_head tx_queue; 105 struct sk_buff_head tx_pending_queue; 106 struct sk_buff_head tx_backlog_queue; 107 108 struct list_head accept_queue; 109 struct sock *parent; 110 }; 111 112 #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk)) 113 #define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev) 114 115 #define LLCP_HEADER_SIZE 2 116 #define LLCP_SEQUENCE_SIZE 1 117 118 /* LLCP versions: 1.1 is 1.0 plus SDP */ 119 #define LLCP_VERSION_10 0x10 120 #define LLCP_VERSION_11 0x11 121 122 /* LLCP PDU types */ 123 #define LLCP_PDU_SYMM 0x0 124 #define LLCP_PDU_PAX 0x1 125 #define LLCP_PDU_AGF 0x2 126 #define LLCP_PDU_UI 0x3 127 #define LLCP_PDU_CONNECT 0x4 128 #define LLCP_PDU_DISC 0x5 129 #define LLCP_PDU_CC 0x6 130 #define LLCP_PDU_DM 0x7 131 #define LLCP_PDU_FRMR 0x8 132 #define LLCP_PDU_SNL 0x9 133 #define LLCP_PDU_I 0xc 134 #define LLCP_PDU_RR 0xd 135 #define LLCP_PDU_RNR 0xe 136 137 /* Parameters TLV types */ 138 #define LLCP_TLV_VERSION 0x1 139 #define LLCP_TLV_MIUX 0x2 140 #define LLCP_TLV_WKS 0x3 141 #define LLCP_TLV_LTO 0x4 142 #define LLCP_TLV_RW 0x5 143 #define LLCP_TLV_SN 0x6 144 #define LLCP_TLV_OPT 0x7 145 #define LLCP_TLV_SDREQ 0x8 146 #define LLCP_TLV_SDRES 0x9 147 #define LLCP_TLV_MAX 0xa 148 149 /* Well known LLCP SAP */ 150 #define LLCP_SAP_SDP 0x1 151 #define LLCP_SAP_IP 0x2 152 #define LLCP_SAP_OBEX 0x3 153 #define LLCP_SAP_SNEP 0x4 154 #define LLCP_SAP_MAX 0xff 155 156 /* Disconnection reason code */ 157 #define LLCP_DM_DISC 0x00 158 #define LLCP_DM_NOCONN 0x01 159 #define LLCP_DM_NOBOUND 0x02 160 #define LLCP_DM_REJ 0x03 161 162 163 struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); 164 u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, 165 struct nfc_llcp_sock *sock); 166 u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local); 167 void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap); 168 169 /* Sock API */ 170 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp); 171 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock); 172 void nfc_llcp_accept_unlink(struct sock *sk); 173 void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk); 174 struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock); 175 176 /* TLV API */ 177 int nfc_llcp_parse_tlv(struct nfc_llcp_local *local, 178 u8 *tlv_array, u16 tlv_array_len); 179 180 /* Commands API */ 181 void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); 182 u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length); 183 void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); 184 int nfc_llcp_disconnect(struct nfc_llcp_sock *sock); 185 int nfc_llcp_send_symm(struct nfc_dev *dev); 186 int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); 187 int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); 188 int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); 189 int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); 190 191 /* Socket API */ 192 int __init nfc_llcp_sock_init(void); 193 void nfc_llcp_sock_exit(void); 194