NFC: Move LLCP code to the NFC top level diirectory
And stop making it optional. LLCP is a fundamental part of the NFC specifications and making it optional does not make much sense. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz
parent
b006ed545c
commit
30cc458765
9 changed files with 8 additions and 79 deletions
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@ -15,6 +15,5 @@ menuconfig NFC
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source "net/nfc/nci/Kconfig"
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source "net/nfc/hci/Kconfig"
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source "net/nfc/llcp/Kconfig"
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source "drivers/nfc/Kconfig"
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@ -5,6 +5,8 @@
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obj-$(CONFIG_NFC) += nfc.o
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obj-$(CONFIG_NFC_NCI) += nci/
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obj-$(CONFIG_NFC_HCI) += hci/
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#obj-$(CONFIG_NFC_LLCP) += llcp/
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nfc-objs := core.o netlink.o af_nfc.o rawsock.o llcp_core.o llcp_commands.o \
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llcp_sock.o
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nfc-objs := core.o netlink.o af_nfc.o rawsock.o
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nfc-$(CONFIG_NFC_LLCP) += llcp/llcp.o llcp/commands.o llcp/sock.o
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267
net/nfc/llcp.h
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267
net/nfc/llcp.h
Normal file
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@ -0,0 +1,267 @@
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/*
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* Copyright (C) 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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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_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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struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local);
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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);
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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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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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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, 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, 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_disconnect(struct nfc_llcp_sock *sock);
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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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@ -1,7 +0,0 @@
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config NFC_LLCP
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depends on NFC
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bool "NFC LLCP support"
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default n
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help
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Say Y here if you want to build support for a kernel NFC LLCP
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implementation.
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817
net/nfc/llcp_commands.c
Normal file
817
net/nfc/llcp_commands.c
Normal file
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@ -0,0 +1,817 @@
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/*
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* Copyright (C) 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#define pr_fmt(fmt) "llcp: %s: " fmt, __func__
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/nfc.h>
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#include <net/nfc/nfc.h>
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#include "nfc.h"
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#include "llcp.h"
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static u8 llcp_tlv_length[LLCP_TLV_MAX] = {
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0,
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1, /* VERSION */
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2, /* MIUX */
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2, /* WKS */
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1, /* LTO */
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1, /* RW */
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0, /* SN */
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1, /* OPT */
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0, /* SDREQ */
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2, /* SDRES */
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};
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static u8 llcp_tlv8(u8 *tlv, u8 type)
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{
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if (tlv[0] != type || tlv[1] != llcp_tlv_length[tlv[0]])
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return 0;
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return tlv[2];
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}
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static u16 llcp_tlv16(u8 *tlv, u8 type)
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{
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if (tlv[0] != type || tlv[1] != llcp_tlv_length[tlv[0]])
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return 0;
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return be16_to_cpu(*((__be16 *)(tlv + 2)));
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}
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static u8 llcp_tlv_version(u8 *tlv)
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{
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return llcp_tlv8(tlv, LLCP_TLV_VERSION);
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}
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static u16 llcp_tlv_miux(u8 *tlv)
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{
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return llcp_tlv16(tlv, LLCP_TLV_MIUX) & 0x7ff;
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}
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static u16 llcp_tlv_wks(u8 *tlv)
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{
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return llcp_tlv16(tlv, LLCP_TLV_WKS);
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}
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static u16 llcp_tlv_lto(u8 *tlv)
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{
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return llcp_tlv8(tlv, LLCP_TLV_LTO);
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}
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static u8 llcp_tlv_opt(u8 *tlv)
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{
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return llcp_tlv8(tlv, LLCP_TLV_OPT);
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}
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static u8 llcp_tlv_rw(u8 *tlv)
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{
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return llcp_tlv8(tlv, LLCP_TLV_RW) & 0xf;
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}
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u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length)
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{
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u8 *tlv, length;
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pr_debug("type %d\n", type);
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if (type >= LLCP_TLV_MAX)
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return NULL;
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length = llcp_tlv_length[type];
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if (length == 0 && value_length == 0)
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return NULL;
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else if (length == 0)
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length = value_length;
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*tlv_length = 2 + length;
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tlv = kzalloc(2 + length, GFP_KERNEL);
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if (tlv == NULL)
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return tlv;
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tlv[0] = type;
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tlv[1] = length;
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memcpy(tlv + 2, value, length);
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return tlv;
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}
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struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap)
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{
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struct nfc_llcp_sdp_tlv *sdres;
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u8 value[2];
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sdres = kzalloc(sizeof(struct nfc_llcp_sdp_tlv), GFP_KERNEL);
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if (sdres == NULL)
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return NULL;
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value[0] = tid;
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value[1] = sap;
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sdres->tlv = nfc_llcp_build_tlv(LLCP_TLV_SDRES, value, 2,
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&sdres->tlv_len);
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if (sdres->tlv == NULL) {
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kfree(sdres);
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return NULL;
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}
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sdres->tid = tid;
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sdres->sap = sap;
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INIT_HLIST_NODE(&sdres->node);
|
||||
|
||||
return sdres;
|
||||
}
|
||||
|
||||
struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri,
|
||||
size_t uri_len)
|
||||
{
|
||||
struct nfc_llcp_sdp_tlv *sdreq;
|
||||
|
||||
pr_debug("uri: %s, len: %zu\n", uri, uri_len);
|
||||
|
||||
sdreq = kzalloc(sizeof(struct nfc_llcp_sdp_tlv), GFP_KERNEL);
|
||||
if (sdreq == NULL)
|
||||
return NULL;
|
||||
|
||||
sdreq->tlv_len = uri_len + 3;
|
||||
|
||||
if (uri[uri_len - 1] == 0)
|
||||
sdreq->tlv_len--;
|
||||
|
||||
sdreq->tlv = kzalloc(sdreq->tlv_len + 1, GFP_KERNEL);
|
||||
if (sdreq->tlv == NULL) {
|
||||
kfree(sdreq);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
sdreq->tlv[0] = LLCP_TLV_SDREQ;
|
||||
sdreq->tlv[1] = sdreq->tlv_len - 2;
|
||||
sdreq->tlv[2] = tid;
|
||||
|
||||
sdreq->tid = tid;
|
||||
sdreq->uri = sdreq->tlv + 3;
|
||||
memcpy(sdreq->uri, uri, uri_len);
|
||||
|
||||
sdreq->time = jiffies;
|
||||
|
||||
INIT_HLIST_NODE(&sdreq->node);
|
||||
|
||||
return sdreq;
|
||||
}
|
||||
|
||||
void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp)
|
||||
{
|
||||
kfree(sdp->tlv);
|
||||
kfree(sdp);
|
||||
}
|
||||
|
||||
void nfc_llcp_free_sdp_tlv_list(struct hlist_head *head)
|
||||
{
|
||||
struct nfc_llcp_sdp_tlv *sdp;
|
||||
struct hlist_node *n;
|
||||
|
||||
hlist_for_each_entry_safe(sdp, n, head, node) {
|
||||
hlist_del(&sdp->node);
|
||||
|
||||
nfc_llcp_free_sdp_tlv(sdp);
|
||||
}
|
||||
}
|
||||
|
||||
int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
|
||||
u8 *tlv_array, u16 tlv_array_len)
|
||||
{
|
||||
u8 *tlv = tlv_array, type, length, offset = 0;
|
||||
|
||||
pr_debug("TLV array length %d\n", tlv_array_len);
|
||||
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
while (offset < tlv_array_len) {
|
||||
type = tlv[0];
|
||||
length = tlv[1];
|
||||
|
||||
pr_debug("type 0x%x length %d\n", type, length);
|
||||
|
||||
switch (type) {
|
||||
case LLCP_TLV_VERSION:
|
||||
local->remote_version = llcp_tlv_version(tlv);
|
||||
break;
|
||||
case LLCP_TLV_MIUX:
|
||||
local->remote_miu = llcp_tlv_miux(tlv) + 128;
|
||||
break;
|
||||
case LLCP_TLV_WKS:
|
||||
local->remote_wks = llcp_tlv_wks(tlv);
|
||||
break;
|
||||
case LLCP_TLV_LTO:
|
||||
local->remote_lto = llcp_tlv_lto(tlv) * 10;
|
||||
break;
|
||||
case LLCP_TLV_OPT:
|
||||
local->remote_opt = llcp_tlv_opt(tlv);
|
||||
break;
|
||||
default:
|
||||
pr_err("Invalid gt tlv value 0x%x\n", type);
|
||||
break;
|
||||
}
|
||||
|
||||
offset += length + 2;
|
||||
tlv += length + 2;
|
||||
}
|
||||
|
||||
pr_debug("version 0x%x miu %d lto %d opt 0x%x wks 0x%x\n",
|
||||
local->remote_version, local->remote_miu,
|
||||
local->remote_lto, local->remote_opt,
|
||||
local->remote_wks);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
|
||||
u8 *tlv_array, u16 tlv_array_len)
|
||||
{
|
||||
u8 *tlv = tlv_array, type, length, offset = 0;
|
||||
|
||||
pr_debug("TLV array length %d\n", tlv_array_len);
|
||||
|
||||
if (sock == NULL)
|
||||
return -ENOTCONN;
|
||||
|
||||
while (offset < tlv_array_len) {
|
||||
type = tlv[0];
|
||||
length = tlv[1];
|
||||
|
||||
pr_debug("type 0x%x length %d\n", type, length);
|
||||
|
||||
switch (type) {
|
||||
case LLCP_TLV_MIUX:
|
||||
sock->remote_miu = llcp_tlv_miux(tlv) + 128;
|
||||
break;
|
||||
case LLCP_TLV_RW:
|
||||
sock->remote_rw = llcp_tlv_rw(tlv);
|
||||
break;
|
||||
case LLCP_TLV_SN:
|
||||
break;
|
||||
default:
|
||||
pr_err("Invalid gt tlv value 0x%x\n", type);
|
||||
break;
|
||||
}
|
||||
|
||||
offset += length + 2;
|
||||
tlv += length + 2;
|
||||
}
|
||||
|
||||
pr_debug("sock %p rw %d miu %d\n", sock,
|
||||
sock->remote_rw, sock->remote_miu);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct sk_buff *llcp_add_header(struct sk_buff *pdu,
|
||||
u8 dsap, u8 ssap, u8 ptype)
|
||||
{
|
||||
u8 header[2];
|
||||
|
||||
pr_debug("ptype 0x%x dsap 0x%x ssap 0x%x\n", ptype, dsap, ssap);
|
||||
|
||||
header[0] = (u8)((dsap << 2) | (ptype >> 2));
|
||||
header[1] = (u8)((ptype << 6) | ssap);
|
||||
|
||||
pr_debug("header 0x%x 0x%x\n", header[0], header[1]);
|
||||
|
||||
memcpy(skb_put(pdu, LLCP_HEADER_SIZE), header, LLCP_HEADER_SIZE);
|
||||
|
||||
return pdu;
|
||||
}
|
||||
|
||||
static struct sk_buff *llcp_add_tlv(struct sk_buff *pdu, u8 *tlv,
|
||||
u8 tlv_length)
|
||||
{
|
||||
/* XXX Add an skb length check */
|
||||
|
||||
if (tlv == NULL)
|
||||
return NULL;
|
||||
|
||||
memcpy(skb_put(pdu, tlv_length), tlv, tlv_length);
|
||||
|
||||
return pdu;
|
||||
}
|
||||
|
||||
static struct sk_buff *llcp_allocate_pdu(struct nfc_llcp_sock *sock,
|
||||
u8 cmd, u16 size)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
int err;
|
||||
|
||||
if (sock->ssap == 0)
|
||||
return NULL;
|
||||
|
||||
skb = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT,
|
||||
size + LLCP_HEADER_SIZE, &err);
|
||||
if (skb == NULL) {
|
||||
pr_err("Could not allocate PDU\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
skb = llcp_add_header(skb, sock->dsap, sock->ssap, cmd);
|
||||
|
||||
return skb;
|
||||
}
|
||||
|
||||
int nfc_llcp_disconnect(struct nfc_llcp_sock *sock)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
struct nfc_dev *dev;
|
||||
struct nfc_llcp_local *local;
|
||||
|
||||
pr_debug("Sending DISC\n");
|
||||
|
||||
local = sock->local;
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
dev = sock->dev;
|
||||
if (dev == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
skb = llcp_allocate_pdu(sock, LLCP_PDU_DISC, 0);
|
||||
if (skb == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
skb_queue_tail(&local->tx_queue, skb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_symm(struct nfc_dev *dev)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
struct nfc_llcp_local *local;
|
||||
u16 size = 0;
|
||||
|
||||
pr_debug("Sending SYMM\n");
|
||||
|
||||
local = nfc_llcp_find_local(dev);
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
size += LLCP_HEADER_SIZE;
|
||||
size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
|
||||
|
||||
skb = alloc_skb(size, GFP_KERNEL);
|
||||
if (skb == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
|
||||
|
||||
skb = llcp_add_header(skb, 0, 0, LLCP_PDU_SYMM);
|
||||
|
||||
__net_timestamp(skb);
|
||||
|
||||
nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_TX);
|
||||
|
||||
return nfc_data_exchange(dev, local->target_idx, skb,
|
||||
nfc_llcp_recv, local);
|
||||
}
|
||||
|
||||
int nfc_llcp_send_connect(struct nfc_llcp_sock *sock)
|
||||
{
|
||||
struct nfc_llcp_local *local;
|
||||
struct sk_buff *skb;
|
||||
u8 *service_name_tlv = NULL, service_name_tlv_length;
|
||||
u8 *miux_tlv = NULL, miux_tlv_length;
|
||||
u8 *rw_tlv = NULL, rw_tlv_length, rw;
|
||||
int err;
|
||||
u16 size = 0, miux;
|
||||
|
||||
pr_debug("Sending CONNECT\n");
|
||||
|
||||
local = sock->local;
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
if (sock->service_name != NULL) {
|
||||
service_name_tlv = nfc_llcp_build_tlv(LLCP_TLV_SN,
|
||||
sock->service_name,
|
||||
sock->service_name_len,
|
||||
&service_name_tlv_length);
|
||||
size += service_name_tlv_length;
|
||||
}
|
||||
|
||||
/* If the socket parameters are not set, use the local ones */
|
||||
miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ?
|
||||
local->miux : sock->miux;
|
||||
rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw;
|
||||
|
||||
miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
|
||||
&miux_tlv_length);
|
||||
size += miux_tlv_length;
|
||||
|
||||
rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
|
||||
size += rw_tlv_length;
|
||||
|
||||
pr_debug("SKB size %d SN length %zu\n", size, sock->service_name_len);
|
||||
|
||||
skb = llcp_allocate_pdu(sock, LLCP_PDU_CONNECT, size);
|
||||
if (skb == NULL) {
|
||||
err = -ENOMEM;
|
||||
goto error_tlv;
|
||||
}
|
||||
|
||||
if (service_name_tlv != NULL)
|
||||
skb = llcp_add_tlv(skb, service_name_tlv,
|
||||
service_name_tlv_length);
|
||||
|
||||
skb = llcp_add_tlv(skb, miux_tlv, miux_tlv_length);
|
||||
skb = llcp_add_tlv(skb, rw_tlv, rw_tlv_length);
|
||||
|
||||
skb_queue_tail(&local->tx_queue, skb);
|
||||
|
||||
return 0;
|
||||
|
||||
error_tlv:
|
||||
pr_err("error %d\n", err);
|
||||
|
||||
kfree(service_name_tlv);
|
||||
kfree(miux_tlv);
|
||||
kfree(rw_tlv);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_cc(struct nfc_llcp_sock *sock)
|
||||
{
|
||||
struct nfc_llcp_local *local;
|
||||
struct sk_buff *skb;
|
||||
u8 *miux_tlv = NULL, miux_tlv_length;
|
||||
u8 *rw_tlv = NULL, rw_tlv_length, rw;
|
||||
int err;
|
||||
u16 size = 0, miux;
|
||||
|
||||
pr_debug("Sending CC\n");
|
||||
|
||||
local = sock->local;
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
/* If the socket parameters are not set, use the local ones */
|
||||
miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ?
|
||||
local->miux : sock->miux;
|
||||
rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw;
|
||||
|
||||
miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
|
||||
&miux_tlv_length);
|
||||
size += miux_tlv_length;
|
||||
|
||||
rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
|
||||
size += rw_tlv_length;
|
||||
|
||||
skb = llcp_allocate_pdu(sock, LLCP_PDU_CC, size);
|
||||
if (skb == NULL) {
|
||||
err = -ENOMEM;
|
||||
goto error_tlv;
|
||||
}
|
||||
|
||||
skb = llcp_add_tlv(skb, miux_tlv, miux_tlv_length);
|
||||
skb = llcp_add_tlv(skb, rw_tlv, rw_tlv_length);
|
||||
|
||||
skb_queue_tail(&local->tx_queue, skb);
|
||||
|
||||
return 0;
|
||||
|
||||
error_tlv:
|
||||
pr_err("error %d\n", err);
|
||||
|
||||
kfree(miux_tlv);
|
||||
kfree(rw_tlv);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct sk_buff *nfc_llcp_allocate_snl(struct nfc_llcp_local *local,
|
||||
size_t tlv_length)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
struct nfc_dev *dev;
|
||||
u16 size = 0;
|
||||
|
||||
if (local == NULL)
|
||||
return ERR_PTR(-ENODEV);
|
||||
|
||||
dev = local->dev;
|
||||
if (dev == NULL)
|
||||
return ERR_PTR(-ENODEV);
|
||||
|
||||
size += LLCP_HEADER_SIZE;
|
||||
size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
|
||||
size += tlv_length;
|
||||
|
||||
skb = alloc_skb(size, GFP_KERNEL);
|
||||
if (skb == NULL)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
|
||||
|
||||
skb = llcp_add_header(skb, LLCP_SAP_SDP, LLCP_SAP_SDP, LLCP_PDU_SNL);
|
||||
|
||||
return skb;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
|
||||
struct hlist_head *tlv_list, size_t tlvs_len)
|
||||
{
|
||||
struct nfc_llcp_sdp_tlv *sdp;
|
||||
struct hlist_node *n;
|
||||
struct sk_buff *skb;
|
||||
|
||||
skb = nfc_llcp_allocate_snl(local, tlvs_len);
|
||||
if (IS_ERR(skb))
|
||||
return PTR_ERR(skb);
|
||||
|
||||
hlist_for_each_entry_safe(sdp, n, tlv_list, node) {
|
||||
memcpy(skb_put(skb, sdp->tlv_len), sdp->tlv, sdp->tlv_len);
|
||||
|
||||
hlist_del(&sdp->node);
|
||||
|
||||
nfc_llcp_free_sdp_tlv(sdp);
|
||||
}
|
||||
|
||||
skb_queue_tail(&local->tx_queue, skb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
|
||||
struct hlist_head *tlv_list, size_t tlvs_len)
|
||||
{
|
||||
struct nfc_llcp_sdp_tlv *sdreq;
|
||||
struct hlist_node *n;
|
||||
struct sk_buff *skb;
|
||||
|
||||
skb = nfc_llcp_allocate_snl(local, tlvs_len);
|
||||
if (IS_ERR(skb))
|
||||
return PTR_ERR(skb);
|
||||
|
||||
mutex_lock(&local->sdreq_lock);
|
||||
|
||||
if (hlist_empty(&local->pending_sdreqs))
|
||||
mod_timer(&local->sdreq_timer,
|
||||
jiffies + msecs_to_jiffies(3 * local->remote_lto));
|
||||
|
||||
hlist_for_each_entry_safe(sdreq, n, tlv_list, node) {
|
||||
pr_debug("tid %d for %s\n", sdreq->tid, sdreq->uri);
|
||||
|
||||
memcpy(skb_put(skb, sdreq->tlv_len), sdreq->tlv,
|
||||
sdreq->tlv_len);
|
||||
|
||||
hlist_del(&sdreq->node);
|
||||
|
||||
hlist_add_head(&sdreq->node, &local->pending_sdreqs);
|
||||
}
|
||||
|
||||
mutex_unlock(&local->sdreq_lock);
|
||||
|
||||
skb_queue_tail(&local->tx_queue, skb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
struct nfc_dev *dev;
|
||||
u16 size = 1; /* Reason code */
|
||||
|
||||
pr_debug("Sending DM reason 0x%x\n", reason);
|
||||
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
dev = local->dev;
|
||||
if (dev == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
size += LLCP_HEADER_SIZE;
|
||||
size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
|
||||
|
||||
skb = alloc_skb(size, GFP_KERNEL);
|
||||
if (skb == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
|
||||
|
||||
skb = llcp_add_header(skb, dsap, ssap, LLCP_PDU_DM);
|
||||
|
||||
memcpy(skb_put(skb, 1), &reason, 1);
|
||||
|
||||
skb_queue_head(&local->tx_queue, skb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
struct nfc_llcp_local *local;
|
||||
|
||||
pr_debug("Send DISC\n");
|
||||
|
||||
local = sock->local;
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
skb = llcp_allocate_pdu(sock, LLCP_PDU_DISC, 0);
|
||||
if (skb == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
skb_queue_head(&local->tx_queue, skb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
|
||||
struct msghdr *msg, size_t len)
|
||||
{
|
||||
struct sk_buff *pdu;
|
||||
struct sock *sk = &sock->sk;
|
||||
struct nfc_llcp_local *local;
|
||||
size_t frag_len = 0, remaining_len;
|
||||
u8 *msg_data, *msg_ptr;
|
||||
u16 remote_miu;
|
||||
|
||||
pr_debug("Send I frame len %zd\n", len);
|
||||
|
||||
local = sock->local;
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
/* Remote is ready but has not acknowledged our frames */
|
||||
if((sock->remote_ready &&
|
||||
skb_queue_len(&sock->tx_pending_queue) >= sock->remote_rw &&
|
||||
skb_queue_len(&sock->tx_queue) >= 2 * sock->remote_rw)) {
|
||||
pr_err("Pending queue is full %d frames\n",
|
||||
skb_queue_len(&sock->tx_pending_queue));
|
||||
return -ENOBUFS;
|
||||
}
|
||||
|
||||
/* Remote is not ready and we've been queueing enough frames */
|
||||
if ((!sock->remote_ready &&
|
||||
skb_queue_len(&sock->tx_queue) >= 2 * sock->remote_rw)) {
|
||||
pr_err("Tx queue is full %d frames\n",
|
||||
skb_queue_len(&sock->tx_queue));
|
||||
return -ENOBUFS;
|
||||
}
|
||||
|
||||
msg_data = kzalloc(len, GFP_KERNEL);
|
||||
if (msg_data == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
if (memcpy_fromiovec(msg_data, msg->msg_iov, len)) {
|
||||
kfree(msg_data);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
remaining_len = len;
|
||||
msg_ptr = msg_data;
|
||||
|
||||
do {
|
||||
remote_miu = sock->remote_miu > LLCP_MAX_MIU ?
|
||||
local->remote_miu : sock->remote_miu;
|
||||
|
||||
frag_len = min_t(size_t, remote_miu, remaining_len);
|
||||
|
||||
pr_debug("Fragment %zd bytes remaining %zd",
|
||||
frag_len, remaining_len);
|
||||
|
||||
pdu = llcp_allocate_pdu(sock, LLCP_PDU_I,
|
||||
frag_len + LLCP_SEQUENCE_SIZE);
|
||||
if (pdu == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
skb_put(pdu, LLCP_SEQUENCE_SIZE);
|
||||
|
||||
if (likely(frag_len > 0))
|
||||
memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
|
||||
|
||||
skb_queue_tail(&sock->tx_queue, pdu);
|
||||
|
||||
lock_sock(sk);
|
||||
|
||||
nfc_llcp_queue_i_frames(sock);
|
||||
|
||||
release_sock(sk);
|
||||
|
||||
remaining_len -= frag_len;
|
||||
msg_ptr += frag_len;
|
||||
} while (remaining_len > 0);
|
||||
|
||||
kfree(msg_data);
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
|
||||
struct msghdr *msg, size_t len)
|
||||
{
|
||||
struct sk_buff *pdu;
|
||||
struct nfc_llcp_local *local;
|
||||
size_t frag_len = 0, remaining_len;
|
||||
u8 *msg_ptr, *msg_data;
|
||||
u16 remote_miu;
|
||||
int err;
|
||||
|
||||
pr_debug("Send UI frame len %zd\n", len);
|
||||
|
||||
local = sock->local;
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
msg_data = kzalloc(len, GFP_KERNEL);
|
||||
if (msg_data == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
if (memcpy_fromiovec(msg_data, msg->msg_iov, len)) {
|
||||
kfree(msg_data);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
remaining_len = len;
|
||||
msg_ptr = msg_data;
|
||||
|
||||
do {
|
||||
remote_miu = sock->remote_miu > LLCP_MAX_MIU ?
|
||||
local->remote_miu : sock->remote_miu;
|
||||
|
||||
frag_len = min_t(size_t, remote_miu, remaining_len);
|
||||
|
||||
pr_debug("Fragment %zd bytes remaining %zd",
|
||||
frag_len, remaining_len);
|
||||
|
||||
pdu = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT,
|
||||
frag_len + LLCP_HEADER_SIZE, &err);
|
||||
if (pdu == NULL) {
|
||||
pr_err("Could not allocate PDU\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
|
||||
|
||||
if (likely(frag_len > 0))
|
||||
memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
|
||||
|
||||
/* No need to check for the peer RW for UI frames */
|
||||
skb_queue_tail(&local->tx_queue, pdu);
|
||||
|
||||
remaining_len -= frag_len;
|
||||
msg_ptr += frag_len;
|
||||
} while (remaining_len > 0);
|
||||
|
||||
kfree(msg_data);
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
int nfc_llcp_send_rr(struct nfc_llcp_sock *sock)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
struct nfc_llcp_local *local;
|
||||
|
||||
pr_debug("Send rr nr %d\n", sock->recv_n);
|
||||
|
||||
local = sock->local;
|
||||
if (local == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
skb = llcp_allocate_pdu(sock, LLCP_PDU_RR, LLCP_SEQUENCE_SIZE);
|
||||
if (skb == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
skb_put(skb, LLCP_SEQUENCE_SIZE);
|
||||
|
||||
skb->data[2] = sock->recv_n;
|
||||
|
||||
skb_queue_head(&local->tx_queue, skb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
1624
net/nfc/llcp_core.c
Normal file
1624
net/nfc/llcp_core.c
Normal file
File diff suppressed because it is too large
Load diff
1025
net/nfc/llcp_sock.c
Normal file
1025
net/nfc/llcp_sock.c
Normal file
File diff suppressed because it is too large
Load diff
|
|
@ -28,8 +28,7 @@
|
|||
#include <linux/slab.h>
|
||||
|
||||
#include "nfc.h"
|
||||
|
||||
#include "llcp/llcp.h"
|
||||
#include "llcp.h"
|
||||
|
||||
static struct genl_multicast_group nfc_genl_event_mcgrp = {
|
||||
.name = NFC_GENL_MCAST_EVENT_NAME,
|
||||
|
|
|
|||
|
|
@ -48,8 +48,6 @@ struct nfc_rawsock {
|
|||
|
||||
struct nfc_llcp_sdp_tlv;
|
||||
|
||||
#ifdef CONFIG_NFC_LLCP
|
||||
|
||||
void nfc_llcp_mac_is_down(struct nfc_dev *dev);
|
||||
void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
|
||||
u8 comm_mode, u8 rf_mode);
|
||||
|
|
@ -64,68 +62,6 @@ void nfc_llcp_exit(void);
|
|||
void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp);
|
||||
void nfc_llcp_free_sdp_tlv_list(struct hlist_head *head);
|
||||
|
||||
#else
|
||||
|
||||
static inline void nfc_llcp_mac_is_down(struct nfc_dev *dev)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
|
||||
u8 comm_mode, u8 rf_mode)
|
||||
{
|
||||
}
|
||||
|
||||
static inline int nfc_llcp_register_device(struct nfc_dev *dev)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void nfc_llcp_unregister_device(struct nfc_dev *dev)
|
||||
{
|
||||
}
|
||||
|
||||
static inline int nfc_llcp_set_remote_gb(struct nfc_dev *dev,
|
||||
u8 *gb, u8 gb_len)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *gb_len)
|
||||
{
|
||||
*gb_len = 0;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline int nfc_llcp_data_received(struct nfc_dev *dev,
|
||||
struct sk_buff *skb)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline int nfc_llcp_init(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void nfc_llcp_exit(void)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head)
|
||||
{
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
int __init rawsock_init(void);
|
||||
void rawsock_exit(void);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue