253 lines
6.7 KiB
C
253 lines
6.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2011 Intel Corporation. All rights reserved.
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*/
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enum llcp_state {
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LLCP_CONNECTED = 1, /* wait_for_packet() wants that */
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LLCP_CONNECTING,
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LLCP_CLOSED,
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LLCP_BOUND,
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LLCP_LISTEN,
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};
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#define LLCP_DEFAULT_LTO 100
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#define LLCP_DEFAULT_RW 1
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#define LLCP_DEFAULT_MIU 128
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#define LLCP_MAX_LTO 0xff
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#define LLCP_MAX_RW 15
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#define LLCP_MAX_MIUX 0x7ff
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#define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128)
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#define LLCP_WKS_NUM_SAP 16
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#define LLCP_SDP_NUM_SAP 16
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#define LLCP_LOCAL_NUM_SAP 32
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#define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP)
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#define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP)
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#define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1)
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struct nfc_llcp_sock;
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struct llcp_sock_list {
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struct hlist_head head;
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rwlock_t lock;
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};
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struct nfc_llcp_sdp_tlv {
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u8 *tlv;
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u8 tlv_len;
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char *uri;
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u8 tid;
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u8 sap;
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unsigned long time;
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struct hlist_node node;
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};
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struct nfc_llcp_local {
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struct list_head list;
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struct nfc_dev *dev;
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struct kref ref;
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struct mutex sdp_lock;
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struct timer_list link_timer;
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struct sk_buff_head tx_queue;
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struct work_struct tx_work;
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struct work_struct rx_work;
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struct sk_buff *rx_pending;
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struct work_struct timeout_work;
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u32 target_idx;
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u8 rf_mode;
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u8 comm_mode;
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u8 lto;
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u8 rw;
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__be16 miux;
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unsigned long local_wks; /* Well known services */
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unsigned long local_sdp; /* Local services */
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unsigned long local_sap; /* Local SAPs, not available for discovery */
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atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP];
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/* local */
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u8 gb[NFC_MAX_GT_LEN];
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u8 gb_len;
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/* remote */
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u8 remote_gb[NFC_MAX_GT_LEN];
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u8 remote_gb_len;
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u8 remote_version;
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u16 remote_miu;
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u16 remote_lto;
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u8 remote_opt;
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u16 remote_wks;
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struct mutex sdreq_lock;
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struct hlist_head pending_sdreqs;
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struct timer_list sdreq_timer;
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struct work_struct sdreq_timeout_work;
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u8 sdreq_next_tid;
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/* sockets array */
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struct llcp_sock_list sockets;
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struct llcp_sock_list connecting_sockets;
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struct llcp_sock_list raw_sockets;
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};
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struct nfc_llcp_sock {
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struct sock sk;
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struct nfc_dev *dev;
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struct nfc_llcp_local *local;
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u32 target_idx;
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u32 nfc_protocol;
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/* Link parameters */
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u8 ssap;
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u8 dsap;
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char *service_name;
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size_t service_name_len;
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u8 rw;
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__be16 miux;
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/* Remote link parameters */
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u8 remote_rw;
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u16 remote_miu;
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/* Link variables */
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u8 send_n;
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u8 send_ack_n;
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u8 recv_n;
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u8 recv_ack_n;
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/* Is the remote peer ready to receive */
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u8 remote_ready;
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/* Reserved source SAP */
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u8 reserved_ssap;
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struct sk_buff_head tx_queue;
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struct sk_buff_head tx_pending_queue;
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struct list_head accept_queue;
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struct sock *parent;
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};
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struct nfc_llcp_ui_cb {
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__u8 dsap;
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__u8 ssap;
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};
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#define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0]))
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#define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
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#define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev)
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#define LLCP_HEADER_SIZE 2
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#define LLCP_SEQUENCE_SIZE 1
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#define LLCP_AGF_PDU_HEADER_SIZE 2
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/* LLCP versions: 1.1 is 1.0 plus SDP */
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#define LLCP_VERSION_10 0x10
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#define LLCP_VERSION_11 0x11
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/* LLCP PDU types */
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#define LLCP_PDU_SYMM 0x0
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#define LLCP_PDU_PAX 0x1
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#define LLCP_PDU_AGF 0x2
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#define LLCP_PDU_UI 0x3
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#define LLCP_PDU_CONNECT 0x4
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#define LLCP_PDU_DISC 0x5
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#define LLCP_PDU_CC 0x6
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#define LLCP_PDU_DM 0x7
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#define LLCP_PDU_FRMR 0x8
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#define LLCP_PDU_SNL 0x9
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#define LLCP_PDU_I 0xc
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#define LLCP_PDU_RR 0xd
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#define LLCP_PDU_RNR 0xe
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/* Parameters TLV types */
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#define LLCP_TLV_VERSION 0x1
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#define LLCP_TLV_MIUX 0x2
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#define LLCP_TLV_WKS 0x3
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#define LLCP_TLV_LTO 0x4
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#define LLCP_TLV_RW 0x5
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#define LLCP_TLV_SN 0x6
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#define LLCP_TLV_OPT 0x7
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#define LLCP_TLV_SDREQ 0x8
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#define LLCP_TLV_SDRES 0x9
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#define LLCP_TLV_MAX 0xa
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/* Well known LLCP SAP */
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#define LLCP_SAP_SDP 0x1
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#define LLCP_SAP_IP 0x2
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#define LLCP_SAP_OBEX 0x3
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#define LLCP_SAP_SNEP 0x4
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#define LLCP_SAP_MAX 0xff
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/* Disconnection reason code */
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#define LLCP_DM_DISC 0x00
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#define LLCP_DM_NOCONN 0x01
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#define LLCP_DM_NOBOUND 0x02
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#define LLCP_DM_REJ 0x03
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void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s);
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void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s);
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void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock);
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struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
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int nfc_llcp_local_put(struct nfc_llcp_local *local);
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u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
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struct nfc_llcp_sock *sock);
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u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
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void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
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int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
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void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
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struct sk_buff *skb, u8 direction);
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/* Sock API */
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struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern);
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void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
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void nfc_llcp_accept_unlink(struct sock *sk);
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void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk);
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struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock);
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/* TLV API */
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int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
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const u8 *tlv_array, u16 tlv_array_len);
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int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
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const u8 *tlv_array, u16 tlv_array_len);
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/* Commands API */
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void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
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u8 *nfc_llcp_build_tlv(u8 type, const u8 *value, u8 value_length, u8 *tlv_length);
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struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap);
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struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, const char *uri,
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size_t uri_len);
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void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp);
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void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head);
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void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
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int nfc_llcp_send_symm(struct nfc_dev *dev);
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int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
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int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
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int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
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struct hlist_head *tlv_list, size_t tlvs_len);
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int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
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struct hlist_head *tlv_list, size_t tlvs_len);
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int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
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int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
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int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
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struct msghdr *msg, size_t len);
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int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
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struct msghdr *msg, size_t len);
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int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
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/* Socket API */
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int __init nfc_llcp_sock_init(void);
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void nfc_llcp_sock_exit(void);
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