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_CONNECTING, 23 LLCP_DISCONNECTING, 24 LLCP_CLOSED, 25 LLCP_BOUND, 26 LLCP_LISTEN, 27 }; 28 29 #define LLCP_DEFAULT_LTO 100 30 #define LLCP_DEFAULT_RW 1 31 #define LLCP_DEFAULT_MIU 128 32 33 #define LLCP_MAX_LTO 0xff 34 #define LLCP_MAX_RW 15 35 #define LLCP_MAX_MIUX 0x7ff 36 #define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128) 37 38 #define LLCP_WKS_NUM_SAP 16 39 #define LLCP_SDP_NUM_SAP 16 40 #define LLCP_LOCAL_NUM_SAP 32 41 #define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP) 42 #define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP) 43 #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1) 44 45 struct nfc_llcp_sock; 46 47 struct llcp_sock_list { 48 struct hlist_head head; 49 rwlock_t lock; 50 }; 51 52 struct nfc_llcp_sdp_tlv { 53 u8 *tlv; 54 u8 tlv_len; 55 56 char *uri; 57 u8 tid; 58 u8 sap; 59 60 unsigned long time; 61 62 struct hlist_node node; 63 }; 64 65 struct nfc_llcp_local { 66 struct list_head list; 67 struct nfc_dev *dev; 68 69 struct kref ref; 70 71 struct mutex sdp_lock; 72 73 struct timer_list link_timer; 74 struct sk_buff_head tx_queue; 75 struct work_struct tx_work; 76 struct work_struct rx_work; 77 struct sk_buff *rx_pending; 78 struct work_struct timeout_work; 79 80 u32 target_idx; 81 u8 rf_mode; 82 u8 comm_mode; 83 u8 lto; 84 u8 rw; 85 __be16 miux; 86 unsigned long local_wks; /* Well known services */ 87 unsigned long local_sdp; /* Local services */ 88 unsigned long local_sap; /* Local SAPs, not available for discovery */ 89 atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP]; 90 91 /* local */ 92 u8 gb[NFC_MAX_GT_LEN]; 93 u8 gb_len; 94 95 /* remote */ 96 u8 remote_gb[NFC_MAX_GT_LEN]; 97 u8 remote_gb_len; 98 99 u8 remote_version; 100 u16 remote_miu; 101 u16 remote_lto; 102 u8 remote_opt; 103 u16 remote_wks; 104 105 struct mutex sdreq_lock; 106 struct hlist_head pending_sdreqs; 107 struct timer_list sdreq_timer; 108 struct work_struct sdreq_timeout_work; 109 u8 sdreq_next_tid; 110 111 /* sockets array */ 112 struct llcp_sock_list sockets; 113 struct llcp_sock_list connecting_sockets; 114 struct llcp_sock_list raw_sockets; 115 }; 116 117 struct nfc_llcp_sock { 118 struct sock sk; 119 struct nfc_dev *dev; 120 struct nfc_llcp_local *local; 121 u32 target_idx; 122 u32 nfc_protocol; 123 124 /* Link parameters */ 125 u8 ssap; 126 u8 dsap; 127 char *service_name; 128 size_t service_name_len; 129 u8 rw; 130 __be16 miux; 131 132 133 /* Remote link parameters */ 134 u8 remote_rw; 135 u16 remote_miu; 136 137 /* Link variables */ 138 u8 send_n; 139 u8 send_ack_n; 140 u8 recv_n; 141 u8 recv_ack_n; 142 143 /* Is the remote peer ready to receive */ 144 u8 remote_ready; 145 146 /* Reserved source SAP */ 147 u8 reserved_ssap; 148 149 struct sk_buff_head tx_queue; 150 struct sk_buff_head tx_pending_queue; 151 152 struct list_head accept_queue; 153 struct sock *parent; 154 }; 155 156 struct nfc_llcp_ui_cb { 157 __u8 dsap; 158 __u8 ssap; 159 }; 160 161 #define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0])) 162 163 #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk)) 164 #define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev) 165 166 #define LLCP_HEADER_SIZE 2 167 #define LLCP_SEQUENCE_SIZE 1 168 #define LLCP_AGF_PDU_HEADER_SIZE 2 169 170 /* LLCP versions: 1.1 is 1.0 plus SDP */ 171 #define LLCP_VERSION_10 0x10 172 #define LLCP_VERSION_11 0x11 173 174 /* LLCP PDU types */ 175 #define LLCP_PDU_SYMM 0x0 176 #define LLCP_PDU_PAX 0x1 177 #define LLCP_PDU_AGF 0x2 178 #define LLCP_PDU_UI 0x3 179 #define LLCP_PDU_CONNECT 0x4 180 #define LLCP_PDU_DISC 0x5 181 #define LLCP_PDU_CC 0x6 182 #define LLCP_PDU_DM 0x7 183 #define LLCP_PDU_FRMR 0x8 184 #define LLCP_PDU_SNL 0x9 185 #define LLCP_PDU_I 0xc 186 #define LLCP_PDU_RR 0xd 187 #define LLCP_PDU_RNR 0xe 188 189 /* Parameters TLV types */ 190 #define LLCP_TLV_VERSION 0x1 191 #define LLCP_TLV_MIUX 0x2 192 #define LLCP_TLV_WKS 0x3 193 #define LLCP_TLV_LTO 0x4 194 #define LLCP_TLV_RW 0x5 195 #define LLCP_TLV_SN 0x6 196 #define LLCP_TLV_OPT 0x7 197 #define LLCP_TLV_SDREQ 0x8 198 #define LLCP_TLV_SDRES 0x9 199 #define LLCP_TLV_MAX 0xa 200 201 /* Well known LLCP SAP */ 202 #define LLCP_SAP_SDP 0x1 203 #define LLCP_SAP_IP 0x2 204 #define LLCP_SAP_OBEX 0x3 205 #define LLCP_SAP_SNEP 0x4 206 #define LLCP_SAP_MAX 0xff 207 208 /* Disconnection reason code */ 209 #define LLCP_DM_DISC 0x00 210 #define LLCP_DM_NOCONN 0x01 211 #define LLCP_DM_NOBOUND 0x02 212 #define LLCP_DM_REJ 0x03 213 214 215 void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s); 216 void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s); 217 void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock); 218 struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); 219 struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local); 220 int nfc_llcp_local_put(struct nfc_llcp_local *local); 221 u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, 222 struct nfc_llcp_sock *sock); 223 u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local); 224 void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap); 225 int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock); 226 void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, 227 struct sk_buff *skb, u8 direction); 228 229 /* Sock API */ 230 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp); 231 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock); 232 void nfc_llcp_accept_unlink(struct sock *sk); 233 void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk); 234 struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock); 235 236 /* TLV API */ 237 int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local, 238 u8 *tlv_array, u16 tlv_array_len); 239 int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock, 240 u8 *tlv_array, u16 tlv_array_len); 241 242 /* Commands API */ 243 void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); 244 u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length); 245 struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap); 246 struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri, 247 size_t uri_len); 248 void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp); 249 void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head); 250 void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); 251 int nfc_llcp_send_symm(struct nfc_dev *dev); 252 int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); 253 int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); 254 int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local, 255 struct hlist_head *tlv_list, size_t tlvs_len); 256 int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local, 257 struct hlist_head *tlv_list, size_t tlvs_len); 258 int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); 259 int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); 260 int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, 261 struct msghdr *msg, size_t len); 262 int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, 263 struct msghdr *msg, size_t len); 264 int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); 265 266 /* Socket API */ 267 int __init nfc_llcp_sock_init(void); 268 void nfc_llcp_sock_exit(void); 269