llcp.rar_remote

/* * Copyright (C) 2011 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */ enum llcp_state { LLCP_CONNECTED = 1, /* wait_for_packet() wants that */ LLCP_CONNECTING, LLCP_DISCONNECTING, LLCP_CLOSED, LLCP_BOUND, LLCP_LISTEN, }; #define LLCP_DEFAULT_LTO 100 #define LLCP_DEFAULT_RW 1 #define LLCP_DEFAULT_MIU 128 #define LLCP_MAX_LTO 0xff #define LLCP_MAX_RW 15 #define LLCP_MAX_MIUX 0x7ff #define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128) #define LLCP_WKS_NUM_SAP 16 #define LLCP_SDP_NUM_SAP 16 #define LLCP_LOCAL_NUM_SAP 32 #define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP) #define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP) #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1) struct nfc_llcp_sock; struct llcp_sock_list { struct hlist_head head; rwlock_t lock; }; struct nfc_llcp_sdp_tlv { u8 *tlv; u8 tlv_len; char *uri; u8 tid; u8 sap; unsigned long time; struct hlist_node node; }; struct nfc_llcp_local { struct list_head list; struct nfc_dev *dev; struct kref ref; struct mutex sdp_lock; struct timer_list link_timer; struct sk_buff_head tx_queue; struct work_struct tx_work; struct work_struct rx_work; struct sk_buff *rx_pending; struct work_struct timeout_work; u32 target_idx; u8 rf_mode; u8 comm_mode; u8 lto; u8 rw; __be16 miux; unsigned long local_wks; /* Well known services */ unsigned long local_sdp; /* Local services */ unsigned long local_sap; /* Local SAPs, not available for discovery */ atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP]; /* local */ u8 gb[NFC_MAX_GT_LEN]; u8 gb_len; /* remote */ u8 remote_gb[NFC_MAX_GT_LEN]; u8 remote_gb_len; u8 remote_version; u16 remote_miu; u16 remote_lto; u8 remote_opt; u16 remote_wks; struct mutex sdreq_lock; struct hlist_head pending_sdreqs; struct timer_list sdreq_timer; struct work_struct sdreq_timeout_work; u8 sdreq_next_tid; /* sockets array */ struct llcp_sock_list sockets; struct llcp_sock_list connecting_sockets; struct llcp_sock_list raw_sockets; }; struct nfc_llcp_sock { struct sock sk; struct nfc_dev *dev; struct nfc_llcp_local *local; u32 target_idx; u32 nfc_protocol; /* Link parameters */ u8 ssap; u8 dsap; char *service_name; size_t service_name_len; u8 rw; __be16 miux; /* Remote link parameters */ u8 remote_rw; u16 remote_miu; /* Link variables */ u8 send_n; u8 send_ack_n; u8 recv_n; u8 recv_ack_n; /* Is the remote peer ready to receive */ u8 remote_ready; /* Reserved source SAP */ u8 reserved_ssap; struct sk_buff_head tx_queue; struct sk_buff_head tx_pending_queue; struct list_head accept_queue; struct sock *parent; }; struct nfc_llcp_ui_cb { __u8 dsap; __u8 ssap; }; #define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0])) #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk)) #define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev) #define LLCP_HEADER_SIZE 2 #define LLCP_SEQUENCE_SIZE 1 #define LLCP_AGF_PDU_HEADER_SIZE 2 /* LLCP versions: 1.1 is 1.0 plus SDP */ #define LLCP_VERSION_10 0x10 #define LLCP_VERSION_11 0x11 /* LLCP PDU types */ #define LLCP_PDU_SYMM 0x0 #define LLCP_PDU_PAX 0x1 #define LLCP_PDU_AGF 0x2 #define LLCP_PDU_UI 0x3 #define LLCP_PDU_CONNECT 0x4 #define LLCP_PDU_DISC 0x5 #define LLCP_PDU_CC 0x6 #define LLCP_PDU_DM 0x7 #define LLCP_PDU_FRMR 0x8 #define LLCP_PDU_SNL 0x9 #define LLCP_PDU_I 0xc #define LLCP_PDU_RR 0xd #define LLCP_PDU_RNR 0xe /* Parameters TLV types */ #define LLCP_TLV_VERSION 0x1 #define LLCP_TLV_MIUX 0x2 #define LLCP_TLV_WKS 0x3 #define LLCP_TLV_LTO 0x4 #define LLCP_TLV_RW 0x5 #define LLCP_TLV_SN 0x6 #define LLCP_TLV_OPT 0x7 #define LLCP_TLV_SDREQ 0x8 #define LLCP_TLV_SDRES 0x9 #define LLCP_TLV_MAX 0xa /* Well known LLCP SAP */ #define LLCP_SAP_SDP 0x1 #define LLCP_SAP_IP 0x2 #define LLCP_SAP_OBEX 0x3 #define LLCP_SAP_SNEP 0x4 #define LLCP_SAP_MAX 0xff /* Disconnection reason code */ #define LLCP_DM_DISC 0x00 #define LLCP_DM_NOCONN 0x01 #define LLCP_DM_NOBOUND 0x02 #define LLCP_DM_REJ 0x03 void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s); void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s); void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock); struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local); int nfc_llcp_local_put(struct nfc_llcp_local *local); u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, struct nfc_llcp_sock *sock); u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local); void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap); int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock); void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, struct sk_buff *skb, u8 direction); /* Sock API */ struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp); void nfc_llcp_sock_free(struct nfc_llcp_sock *sock); void nfc_llcp_accept_unlink(struct sock *sk); void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk); struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock); /* TLV API */ int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local, u8 *tlv_array, u16 tlv_array_len); int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock, u8 *tlv_array, u16 tlv_array_len); /* Commands API */ void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length); struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap); struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri, size_t uri_len); void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp); void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head); void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); int nfc_llcp_send_symm(struct nfc_dev *dev); int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local, struct hlist_head *tlv_list, size_t tlvs_len); int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local, struct hlist_head *tlv_list, size_t tlvs_len); int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, struct msghdr *msg, size_t len); int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, struct msghdr *msg, size_t len); int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); /* Socket API */ int __init nfc_llcp_sock_init(void); void nfc_llcp_sock_exit(void);