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freebsd-skq/sys/netgraph/bluetooth/include/ng_btsocket_rfcomm.h
emax 580248c6b5 Make default RFCOMM session MTU match default L2CAP MTU. 
This is just a workaround for a know problem with Motorola E1000
phone. Something is wrong with the configuration of L2CAP/RFCOMM
channel. Even though we set L2CAP MTU to 132 bytes (default RFCOMM
MTU 127 + 5 bytes RFCOMM frame header) and the phone accepts it,
the phone still sends oversized L2CAP packets. It appears that the
phone wants to use bigger (667 bytes) RFCOMM frames, but it does
not segment them according to the configured L2CAP MTU. The 667
bytes RFCOMM frame size corresponds to the default L2CAP MTU of
672 bytes (667 + 5 bytes RFCOMM frame header).

This problem only appears if connection was initiated from the
phone. I'm not sure who is at fault here, so for now just put
workaround in place. Quick look at the spec did not reveal any
anwser.

Tested by:	Jes < jjess at freebsd dot polarhome dot com >
MFC after:	3 days
2005-01-11 01:39:53 +00:00

340 lines
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/*
* ng_btsocket_rfcomm.h
*/
/*-
* Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: ng_btsocket_rfcomm.h,v 1.10 2003/03/29 22:27:42 max Exp $
* $FreeBSD$
*/
#ifndef _NETGRAPH_BTSOCKET_RFCOMM_H_
#define _NETGRAPH_BTSOCKET_RFCOMM_H_
/*****************************************************************************
*****************************************************************************
** RFCOMM **
*****************************************************************************
*****************************************************************************/
/* XXX FIXME this does not belong here */
#define RFCOMM_DEFAULT_MTU 667
#define RFCOMM_MAX_MTU 1024
#define RFCOMM_DEFAULT_CREDITS 7
#define RFCOMM_MAX_CREDITS 40
/* RFCOMM frame types */
#define RFCOMM_FRAME_SABM 0x2f
#define RFCOMM_FRAME_DISC 0x43
#define RFCOMM_FRAME_UA 0x63
#define RFCOMM_FRAME_DM 0x0f
#define RFCOMM_FRAME_UIH 0xef
/* RFCOMM MCC commands */
#define RFCOMM_MCC_TEST 0x08 /* Test */
#define RFCOMM_MCC_FCON 0x28 /* Flow Control on */
#define RFCOMM_MCC_FCOFF 0x18 /* Flow Control off */
#define RFCOMM_MCC_MSC 0x38 /* Modem Status Command */
#define RFCOMM_MCC_RPN 0x24 /* Remote Port Negotiation */
#define RFCOMM_MCC_RLS 0x14 /* Remote Line Status */
#define RFCOMM_MCC_PN 0x20 /* Port Negotiation */
#define RFCOMM_MCC_NSC 0x04 /* Non Supported Command */
/* RFCOMM modem signals */
#define RFCOMM_MODEM_FC 0x02 /* Flow Control asserted */
#define RFCOMM_MODEM_RTC 0x04 /* Ready To Communicate */
#define RFCOMM_MODEM_RTR 0x08 /* Ready To Receive */
#define RFCOMM_MODEM_IC 0x40 /* Incomming Call */
#define RFCOMM_MODEM_DV 0x80 /* Data Valid */
/* RPN parameters - baud rate */
#define RFCOMM_RPN_BR_2400 0x0
#define RFCOMM_RPN_BR_4800 0x1
#define RFCOMM_RPN_BR_7200 0x2
#define RFCOMM_RPN_BR_9600 0x3
#define RFCOMM_RPN_BR_19200 0x4
#define RFCOMM_RPN_BR_38400 0x5
#define RFCOMM_RPN_BR_57600 0x6
#define RFCOMM_RPN_BR_115200 0x7
#define RFCOMM_RPN_BR_230400 0x8
/* RPN parameters - data bits */
#define RFCOMM_RPN_DATA_5 0x0
#define RFCOMM_RPN_DATA_6 0x1
#define RFCOMM_RPN_DATA_7 0x2
#define RFCOMM_RPN_DATA_8 0x3
/* RPN parameters - stop bit */
#define RFCOMM_RPN_STOP_1 0
#define RFCOMM_RPN_STOP_15 1
/* RPN parameters - parity */
#define RFCOMM_RPN_PARITY_NONE 0x0
#define RFCOMM_RPN_PARITY_ODD 0x4
#define RFCOMM_RPN_PARITY_EVEN 0x5
#define RFCOMM_RPN_PARITY_MARK 0x6
#define RFCOMM_RPN_PARITY_SPACE 0x7
/* RPN parameters - flow control */
#define RFCOMM_RPN_FLOW_NONE 0x00
#define RFCOMM_RPN_XON_CHAR 0x11
#define RFCOMM_RPN_XOFF_CHAR 0x13
/* RPN parameters - mask */
#define RFCOMM_RPN_PM_BITRATE 0x0001
#define RFCOMM_RPN_PM_DATA 0x0002
#define RFCOMM_RPN_PM_STOP 0x0004
#define RFCOMM_RPN_PM_PARITY 0x0008
#define RFCOMM_RPN_PM_PARITY_TYPE 0x0010
#define RFCOMM_RPN_PM_XON 0x0020
#define RFCOMM_RPN_PM_XOFF 0x0040
#define RFCOMM_RPN_PM_FLOW 0x3F00
#define RFCOMM_RPN_PM_ALL 0x3F7F
/* RFCOMM frame header */
struct rfcomm_frame_hdr
{
u_int8_t address;
u_int8_t control;
u_int8_t length; /* Actual size could be 2 bytes */
} __attribute__ ((packed));
/* RFCOMM command frame header */
struct rfcomm_cmd_hdr
{
u_int8_t address;
u_int8_t control;
u_int8_t length;
u_int8_t fcs;
} __attribute__ ((packed));
/* RFCOMM MCC command header */
struct rfcomm_mcc_hdr
{
u_int8_t type;
u_int8_t length; /* XXX FIXME Can actual size be 2 bytes?? */
} __attribute__ ((packed));
/* RFCOMM MSC command */
struct rfcomm_mcc_msc
{
u_int8_t address;
u_int8_t modem;
} __attribute__ ((packed));
/* RFCOMM RPN command */
struct rfcomm_mcc_rpn
{
u_int8_t dlci;
u_int8_t bit_rate;
u_int8_t line_settings;
u_int8_t flow_control;
u_int8_t xon_char;
u_int8_t xoff_char;
u_int16_t param_mask;
} __attribute__ ((packed));
/* RFCOMM RLS command */
struct rfcomm_mcc_rls
{
u_int8_t address;
u_int8_t status;
} __attribute__ ((packed));
/* RFCOMM PN command */
struct rfcomm_mcc_pn
{
u_int8_t dlci;
u_int8_t flow_control;
u_int8_t priority;
u_int8_t ack_timer;
u_int16_t mtu;
u_int8_t max_retrans;
u_int8_t credits;
} __attribute__ ((packed));
/* RFCOMM frame parsing macros */
#define RFCOMM_DLCI(b) (((b) & 0xfc) >> 2)
#define RFCOMM_CHANNEL(b) (((b) & 0xf8) >> 3)
#define RFCOMM_DIRECTION(b) (((b) & 0x04) >> 2)
#define RFCOMM_TYPE(b) (((b) & 0xef))
#define RFCOMM_EA(b) (((b) & 0x01))
#define RFCOMM_CR(b) (((b) & 0x02) >> 1)
#define RFCOMM_PF(b) (((b) & 0x10) >> 4)
#define RFCOMM_SRVCHANNEL(dlci) ((dlci) >> 1)
#define RFCOMM_MKADDRESS(cr, dlci) \
((((dlci) & 0x3f) << 2) | ((cr) << 1) | 0x01)
#define RFCOMM_MKCONTROL(type, pf) ((((type) & 0xef) | ((pf) << 4)))
#define RFCOMM_MKDLCI(dir, channel) ((((channel) & 0x1f) << 1) | (dir))
#define RFCOMM_MKLEN8(len) (((len) << 1) | 1)
#define RFCOMM_MKLEN16(len) ((len) << 1)
/* RFCOMM MCC macros */
#define RFCOMM_MCC_TYPE(b) (((b) & 0xfc) >> 2)
#define RFCOMM_MCC_LENGTH(b) (((b) & 0xfe) >> 1)
#define RFCOMM_MKMCC_TYPE(cr, type) ((((type) << 2) | ((cr) << 1) | 0x01))
/* RPN macros */
#define RFCOMM_RPN_DATA_BITS(line) ((line) & 0x3)
#define RFCOMM_RPN_STOP_BITS(line) (((line) >> 2) & 0x1)
#define RFCOMM_RPN_PARITY(line) (((line) >> 3) & 0x3)
#define RFCOMM_MKRPN_LINE_SETTINGS(data, stop, parity) \
(((data) & 0x3) | (((stop) & 0x1) << 2) | (((parity) & 0x3) << 3))
/*****************************************************************************
*****************************************************************************
** SOCK_STREAM RFCOMM sockets **
*****************************************************************************
*****************************************************************************/
#define NG_BTSOCKET_RFCOMM_SENDSPACE \
(RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 2)
#define NG_BTSOCKET_RFCOMM_RECVSPACE \
(RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 2)
/*
* Bluetooth RFCOMM session. One L2CAP connection == one RFCOMM session
*/
struct ng_btsocket_rfcomm_pcb;
struct ng_btsocket_rfcomm_session;
struct ng_btsocket_rfcomm_session {
struct socket *l2so; /* L2CAP socket */
u_int16_t state; /* session state */
#define NG_BTSOCKET_RFCOMM_SESSION_CLOSED 0
#define NG_BTSOCKET_RFCOMM_SESSION_LISTENING 1
#define NG_BTSOCKET_RFCOMM_SESSION_CONNECTING 2
#define NG_BTSOCKET_RFCOMM_SESSION_CONNECTED 3
#define NG_BTSOCKET_RFCOMM_SESSION_OPEN 4
#define NG_BTSOCKET_RFCOMM_SESSION_DISCONNECTING 5
u_int16_t flags; /* session flags */
#define NG_BTSOCKET_RFCOMM_SESSION_INITIATOR (1 << 0) /* initiator */
#define NG_BTSOCKET_RFCOMM_SESSION_LFC (1 << 1) /* local flow */
#define NG_BTSOCKET_RFCOMM_SESSION_RFC (1 << 2) /* remote flow */
#define INITIATOR(s) \
(((s)->flags & NG_BTSOCKET_RFCOMM_SESSION_INITIATOR)? 1 : 0)
u_int16_t mtu; /* default MTU */
struct ng_bt_mbufq outq; /* outgoing queue */
struct mtx session_mtx; /* session lock */
LIST_HEAD(, ng_btsocket_rfcomm_pcb) dlcs; /* active DLC */
LIST_ENTRY(ng_btsocket_rfcomm_session) next; /* link to next */
};
typedef struct ng_btsocket_rfcomm_session ng_btsocket_rfcomm_session_t;
typedef struct ng_btsocket_rfcomm_session * ng_btsocket_rfcomm_session_p;
/*
* Bluetooth RFCOMM socket PCB (DLC)
*/
struct ng_btsocket_rfcomm_pcb {
struct socket *so; /* RFCOMM socket */
struct ng_btsocket_rfcomm_session *session; /* RFCOMM session */
u_int16_t flags; /* DLC flags */
#define NG_BTSOCKET_RFCOMM_DLC_TIMO (1 << 0) /* timeout pending */
#define NG_BTSOCKET_RFCOMM_DLC_CFC (1 << 1) /* credit flow ctrl */
#define NG_BTSOCKET_RFCOMM_DLC_TIMEDOUT (1 << 2) /* timeout happend */
#define NG_BTSOCKET_RFCOMM_DLC_DETACHED (1 << 3) /* DLC detached */
#define NG_BTSOCKET_RFCOMM_DLC_SENDING (1 << 4) /* send pending */
u_int16_t state; /* DLC state */
#define NG_BTSOCKET_RFCOMM_DLC_CLOSED 0
#define NG_BTSOCKET_RFCOMM_DLC_W4_CONNECT 1
#define NG_BTSOCKET_RFCOMM_DLC_CONFIGURING 2
#define NG_BTSOCKET_RFCOMM_DLC_CONNECTING 3
#define NG_BTSOCKET_RFCOMM_DLC_CONNECTED 4
#define NG_BTSOCKET_RFCOMM_DLC_DISCONNECTING 5
bdaddr_t src; /* source address */
bdaddr_t dst; /* dest. address */
u_int8_t channel; /* RFCOMM channel */
u_int8_t dlci; /* RFCOMM DLCI */
u_int8_t lmodem; /* local mdm signls */
u_int8_t rmodem; /* remote -/- */
u_int16_t mtu; /* MTU */
int16_t rx_cred; /* RX credits */
int16_t tx_cred; /* TX credits */
struct mtx pcb_mtx; /* PCB lock */
struct callout_handle timo; /* timeout */
LIST_ENTRY(ng_btsocket_rfcomm_pcb) session_next;/* link to next */
LIST_ENTRY(ng_btsocket_rfcomm_pcb) next; /* link to next */
};
typedef struct ng_btsocket_rfcomm_pcb ng_btsocket_rfcomm_pcb_t;
typedef struct ng_btsocket_rfcomm_pcb * ng_btsocket_rfcomm_pcb_p;
#define so2rfcomm_pcb(so) \
((struct ng_btsocket_rfcomm_pcb *)((so)->so_pcb))
/*
* Bluetooth RFCOMM socket methods
*/
#ifdef _KERNEL
void ng_btsocket_rfcomm_init (void);
int ng_btsocket_rfcomm_abort (struct socket *);
int ng_btsocket_rfcomm_accept (struct socket *, struct sockaddr **);
int ng_btsocket_rfcomm_attach (struct socket *, int, struct thread *);
int ng_btsocket_rfcomm_bind (struct socket *, struct sockaddr *,
struct thread *);
int ng_btsocket_rfcomm_connect (struct socket *, struct sockaddr *,
struct thread *);
int ng_btsocket_rfcomm_control (struct socket *, u_long, caddr_t,
struct ifnet *, struct thread *);
int ng_btsocket_rfcomm_ctloutput (struct socket *, struct sockopt *);
int ng_btsocket_rfcomm_detach (struct socket *);
int ng_btsocket_rfcomm_disconnect (struct socket *);
int ng_btsocket_rfcomm_listen (struct socket *, struct thread *);
int ng_btsocket_rfcomm_peeraddr (struct socket *, struct sockaddr **);
int ng_btsocket_rfcomm_send (struct socket *, int, struct mbuf *,
struct sockaddr *, struct mbuf *,
struct thread *);
int ng_btsocket_rfcomm_sockaddr (struct socket *, struct sockaddr **);
#endif /* _KERNEL */
#endif /* _NETGRAPH_BTSOCKET_RFCOMM_H_ */
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