--- /dev/null
+/* $Id: isdn.h,v 1.125.2.3 2004/02/10 01:07:14 keil Exp $
+ *
+ * Main header for the Linux ISDN subsystem (linklevel).
+ *
+ * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
+ * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
+ * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+#ifndef __ISDN_H__
+#define __ISDN_H__
+
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <asm/io.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/wait.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial_reg.h>
+#include <linux/fcntl.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/tcp.h>
+#include <linux/mutex.h>
+#include <uapi/linux/isdn.h>
+
+#define ISDN_TTY_MAJOR 43
+#define ISDN_TTYAUX_MAJOR 44
+#define ISDN_MAJOR 45
+
+/* The minor-devicenumbers for Channel 0 and 1 are used as arguments for
+ * physical Channel-Mapping, so they MUST NOT be changed without changing
+ * the correspondent code in isdn.c
+ */
+
+#define ISDN_MINOR_B 0
+#define ISDN_MINOR_BMAX (ISDN_MAX_CHANNELS-1)
+#define ISDN_MINOR_CTRL 64
+#define ISDN_MINOR_CTRLMAX (64 + (ISDN_MAX_CHANNELS-1))
+#define ISDN_MINOR_PPP 128
+#define ISDN_MINOR_PPPMAX (128 + (ISDN_MAX_CHANNELS-1))
+#define ISDN_MINOR_STATUS 255
+
+#ifdef CONFIG_ISDN_PPP
+
+#ifdef CONFIG_ISDN_PPP_VJ
+# include <net/slhc_vj.h>
+#endif
+
+#include <linux/ppp_defs.h>
+#include <linux/ppp-ioctl.h>
+
+#include <linux/isdn_ppp.h>
+#endif
+
+#ifdef CONFIG_ISDN_X25
+# include <linux/concap.h>
+#endif
+
+#include <linux/isdnif.h>
+
+#define ISDN_DRVIOCTL_MASK 0x7f /* Mask for Device-ioctl */
+
+/* Until now unused */
+#define ISDN_SERVICE_VOICE 1
+#define ISDN_SERVICE_AB 1<<1
+#define ISDN_SERVICE_X21 1<<2
+#define ISDN_SERVICE_G4 1<<3
+#define ISDN_SERVICE_BTX 1<<4
+#define ISDN_SERVICE_DFUE 1<<5
+#define ISDN_SERVICE_X25 1<<6
+#define ISDN_SERVICE_TTX 1<<7
+#define ISDN_SERVICE_MIXED 1<<8
+#define ISDN_SERVICE_FW 1<<9
+#define ISDN_SERVICE_GTEL 1<<10
+#define ISDN_SERVICE_BTXN 1<<11
+#define ISDN_SERVICE_BTEL 1<<12
+
+/* Macros checking plain usage */
+#define USG_NONE(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)
+#define USG_RAW(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW)
+#define USG_MODEM(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)
+#define USG_VOICE(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)
+#define USG_NET(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET)
+#define USG_FAX(x) ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX)
+#define USG_OUTGOING(x) ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING)
+#define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \
+ ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE) )
+
+/* Timer-delays and scheduling-flags */
+#define ISDN_TIMER_RES 4 /* Main Timer-Resolution */
+#define ISDN_TIMER_02SEC (HZ/ISDN_TIMER_RES/5) /* Slow-Timer1 .2 sec */
+#define ISDN_TIMER_1SEC (HZ/ISDN_TIMER_RES) /* Slow-Timer2 1 sec */
+#define ISDN_TIMER_RINGING 5 /* tty RINGs = ISDN_TIMER_1SEC * this factor */
+#define ISDN_TIMER_KEEPINT 10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */
+#define ISDN_TIMER_MODEMREAD 1
+#define ISDN_TIMER_MODEMPLUS 2
+#define ISDN_TIMER_MODEMRING 4
+#define ISDN_TIMER_MODEMXMIT 8
+#define ISDN_TIMER_NETDIAL 16
+#define ISDN_TIMER_NETHANGUP 32
+#define ISDN_TIMER_CARRIER 256 /* Wait for Carrier */
+#define ISDN_TIMER_FAST (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \
+ ISDN_TIMER_MODEMXMIT)
+#define ISDN_TIMER_SLOW (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \
+ ISDN_TIMER_NETDIAL | ISDN_TIMER_CARRIER)
+
+/* Timeout-Values for isdn_net_dial() */
+#define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
+#define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
+#define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
+
+/* GLOBAL_FLAGS */
+#define ISDN_GLOBAL_STOPPED 1
+
+/*=================== Start of ip-over-ISDN stuff =========================*/
+
+/* Feature- and status-flags for a net-interface */
+#define ISDN_NET_CONNECTED 0x01 /* Bound to ISDN-Channel */
+#define ISDN_NET_SECURE 0x02 /* Accept calls from phonelist only */
+#define ISDN_NET_CALLBACK 0x04 /* activate callback */
+#define ISDN_NET_CBHUP 0x08 /* hangup before callback */
+#define ISDN_NET_CBOUT 0x10 /* remote machine does callback */
+
+#define ISDN_NET_MAGIC 0x49344C02 /* for paranoia-checking */
+
+/* Phone-list-element */
+typedef struct {
+ void *next;
+ char num[ISDN_MSNLEN];
+} isdn_net_phone;
+
+/*
+ Principles when extending structures for generic encapsulation protocol
+ ("concap") support:
+ - Stuff which is hardware specific (here i4l-specific) goes in
+ the netdev -> local structure (here: isdn_net_local)
+ - Stuff which is encapsulation protocol specific goes in the structure
+ which holds the linux device structure (here: isdn_net_device)
+*/
+
+/* Local interface-data */
+typedef struct isdn_net_local_s {
+ ulong magic;
+ struct net_device_stats stats; /* Ethernet Statistics */
+ int isdn_device; /* Index to isdn-device */
+ int isdn_channel; /* Index to isdn-channel */
+ int ppp_slot; /* PPPD device slot number */
+ int pre_device; /* Preselected isdn-device */
+ int pre_channel; /* Preselected isdn-channel */
+ int exclusive; /* If non-zero idx to reserved chan.*/
+ int flags; /* Connection-flags */
+ int dialretry; /* Counter for Dialout-retries */
+ int dialmax; /* Max. Number of Dial-retries */
+ int cbdelay; /* Delay before Callback starts */
+ int dtimer; /* Timeout-counter for dialing */
+ char msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */
+ u_char cbhup; /* Flag: Reject Call before Callback*/
+ u_char dialstate; /* State for dialing */
+ u_char p_encap; /* Packet encapsulation */
+ /* 0 = Ethernet over ISDN */
+ /* 1 = RAW-IP */
+ /* 2 = IP with type field */
+ u_char l2_proto; /* Layer-2-protocol */
+ /* See ISDN_PROTO_L2..-constants in */
+ /* isdnif.h */
+ /* 0 = X75/LAPB with I-Frames */
+ /* 1 = X75/LAPB with UI-Frames */
+ /* 2 = X75/LAPB with BUI-Frames */
+ /* 3 = HDLC */
+ u_char l3_proto; /* Layer-3-protocol */
+ /* See ISDN_PROTO_L3..-constants in */
+ /* isdnif.h */
+ /* 0 = Transparent */
+ int huptimer; /* Timeout-counter for auto-hangup */
+ int charge; /* Counter for charging units */
+ ulong chargetime; /* Timer for Charging info */
+ int hupflags; /* Flags for charge-unit-hangup: */
+ /* bit0: chargeint is invalid */
+ /* bit1: Getting charge-interval */
+ /* bit2: Do charge-unit-hangup */
+ /* bit3: Do hangup even on incoming */
+ int outgoing; /* Flag: outgoing call */
+ int onhtime; /* Time to keep link up */
+ int chargeint; /* Interval between charge-infos */
+ int onum; /* Flag: at least 1 outgoing number */
+ int cps; /* current speed of this interface */
+ int transcount; /* byte-counter for cps-calculation */
+ int sqfull; /* Flag: netdev-queue overloaded */
+ ulong sqfull_stamp; /* Start-Time of overload */
+ ulong slavedelay; /* Dynamic bundling delaytime */
+ int triggercps; /* BogoCPS needed for trigger slave */
+ isdn_net_phone *phone[2]; /* List of remote-phonenumbers */
+ /* phone[0] = Incoming Numbers */
+ /* phone[1] = Outgoing Numbers */
+ isdn_net_phone *dial; /* Pointer to dialed number */
+ struct net_device *master; /* Ptr to Master device for slaves */
+ struct net_device *slave; /* Ptr to Slave device for masters */
+ struct isdn_net_local_s *next; /* Ptr to next link in bundle */
+ struct isdn_net_local_s *last; /* Ptr to last link in bundle */
+ struct isdn_net_dev_s *netdev; /* Ptr to netdev */
+ struct sk_buff_head super_tx_queue; /* List of supervisory frames to */
+ /* be transmitted asap */
+ atomic_t frame_cnt; /* number of frames currently */
+ /* queued in HL driver */
+ /* Ptr to orig. hard_header_cache */
+ spinlock_t xmit_lock; /* used to protect the xmit path of */
+ /* a particular channel (including */
+ /* the frame_cnt */
+
+ int pppbind; /* ippp device for bindings */
+ int dialtimeout; /* How long shall we try on dialing? (jiffies) */
+ int dialwait; /* How long shall we wait after failed attempt? (jiffies) */
+ ulong dialstarted; /* jiffies of first dialing-attempt */
+ ulong dialwait_timer; /* jiffies of earliest next dialing-attempt */
+ int huptimeout; /* How long will the connection be up? (seconds) */
+#ifdef CONFIG_ISDN_X25
+ struct concap_device_ops *dops; /* callbacks used by encapsulator */
+#endif
+ /* use an own struct for that in later versions */
+ ulong cisco_myseq; /* Local keepalive seq. for Cisco */
+ ulong cisco_mineseen; /* returned keepalive seq. from remote */
+ ulong cisco_yourseq; /* Remote keepalive seq. for Cisco */
+ int cisco_keepalive_period; /* keepalive period */
+ ulong cisco_last_slarp_in; /* jiffie of last keepalive packet we received */
+ char cisco_line_state; /* state of line according to keepalive packets */
+ char cisco_debserint; /* debugging flag of cisco hdlc with slarp */
+ struct timer_list cisco_timer;
+ struct work_struct tqueue;
+} isdn_net_local;
+
+/* the interface itself */
+typedef struct isdn_net_dev_s {
+ isdn_net_local *local;
+ isdn_net_local *queue; /* circular list of all bundled
+ channels, which are currently
+ online */
+ spinlock_t queue_lock; /* lock to protect queue */
+ void *next; /* Pointer to next isdn-interface */
+ struct net_device *dev; /* interface to upper levels */
+#ifdef CONFIG_ISDN_PPP
+ ippp_bundle * pb; /* pointer to the common bundle structure
+ * with the per-bundle data */
+#endif
+#ifdef CONFIG_ISDN_X25
+ struct concap_proto *cprot; /* connection oriented encapsulation protocol */
+#endif
+
+} isdn_net_dev;
+
+/*===================== End of ip-over-ISDN stuff ===========================*/
+
+/*======================= Start of ISDN-tty stuff ===========================*/
+
+#define ISDN_ASYNC_MAGIC 0x49344C01 /* for paranoia-checking */
+#define ISDN_SERIAL_XMIT_SIZE 1024 /* Default bufsize for write */
+#define ISDN_SERIAL_XMIT_MAX 4000 /* Maximum bufsize for write */
+
+#ifdef CONFIG_ISDN_AUDIO
+/* For using sk_buffs with audio we need some private variables
+ * within each sk_buff. For this purpose, we declare a struct here,
+ * and put it always at the private skb->cb data array. A few macros help
+ * accessing the variables.
+ */
+typedef struct _isdn_audio_data {
+ unsigned short dle_count;
+ unsigned char lock;
+} isdn_audio_data_t;
+
+#define ISDN_AUDIO_SKB_DLECOUNT(skb) (((isdn_audio_data_t *)&skb->cb[0])->dle_count)
+#define ISDN_AUDIO_SKB_LOCK(skb) (((isdn_audio_data_t *)&skb->cb[0])->lock)
+#endif
+
+/* Private data of AT-command-interpreter */
+typedef struct atemu {
+ u_char profile[ISDN_MODEM_NUMREG]; /* Modem-Regs. Profile 0 */
+ u_char mdmreg[ISDN_MODEM_NUMREG]; /* Modem-Registers */
+ char pmsn[ISDN_MSNLEN]; /* EAZ/MSNs Profile 0 */
+ char msn[ISDN_MSNLEN]; /* EAZ/MSN */
+ char plmsn[ISDN_LMSNLEN]; /* Listening MSNs Profile 0 */
+ char lmsn[ISDN_LMSNLEN]; /* Listening MSNs */
+ char cpn[ISDN_MSNLEN]; /* CalledPartyNumber on incoming call */
+ char connmsg[ISDN_CMSGLEN]; /* CONNECT-Msg from HL-Driver */
+#ifdef CONFIG_ISDN_AUDIO
+ u_char vpar[10]; /* Voice-parameters */
+ int lastDLE; /* Flag for voice-coding: DLE seen */
+#endif
+ int mdmcmdl; /* Length of Modem-Commandbuffer */
+ int pluscount; /* Counter for +++ sequence */
+ u_long lastplus; /* Timestamp of last + */
+ int carrierwait; /* Seconds of carrier waiting */
+ char mdmcmd[255]; /* Modem-Commandbuffer */
+ unsigned int charge; /* Charge units of current connection */
+} atemu;
+
+/* Private data (similar to async_struct in <linux/serial.h>) */
+typedef struct modem_info {
+ int magic;
+ struct tty_port port;
+ int x_char; /* xon/xoff character */
+ int mcr; /* Modem control register */
+ int msr; /* Modem status register */
+ int lsr; /* Line status register */
+ int line;
+ int online; /* 1 = B-Channel is up, drop data */
+ /* 2 = B-Channel is up, deliver d.*/
+ int dialing; /* Dial in progress or ATA */
+ int rcvsched; /* Receive needs schedule */
+ int isdn_driver; /* Index to isdn-driver */
+ int isdn_channel; /* Index to isdn-channel */
+ int drv_index; /* Index to dev->usage */
+ int ncarrier; /* Flag: schedule NO CARRIER */
+ unsigned char last_cause[8]; /* Last cause message */
+ unsigned char last_num[ISDN_MSNLEN];
+ /* Last phone-number */
+ unsigned char last_l2; /* Last layer-2 protocol */
+ unsigned char last_si; /* Last service */
+ unsigned char last_lhup; /* Last hangup local? */
+ unsigned char last_dir; /* Last direction (in or out) */
+ struct timer_list nc_timer; /* Timer for delayed NO CARRIER */
+ int send_outstanding;/* # of outstanding send-requests */
+ int xmit_size; /* max. # of chars in xmit_buf */
+ int xmit_count; /* # of chars in xmit_buf */
+ struct sk_buff_head xmit_queue; /* transmit queue */
+ atomic_t xmit_lock; /* Semaphore for isdn_tty_write */
+#ifdef CONFIG_ISDN_AUDIO
+ int vonline; /* Voice-channel status */
+ /* Bit 0 = recording */
+ /* Bit 1 = playback */
+ /* Bit 2 = playback, DLE-ETX seen */
+ struct sk_buff_head dtmf_queue; /* queue for dtmf results */
+ void *adpcms; /* state for adpcm decompression */
+ void *adpcmr; /* state for adpcm compression */
+ void *dtmf_state; /* state for dtmf decoder */
+ void *silence_state; /* state for silence detection */
+#endif
+#ifdef CONFIG_ISDN_TTY_FAX
+ struct T30_s *fax; /* T30 Fax Group 3 data/interface */
+ int faxonline; /* Fax-channel status */
+#endif
+ atemu emu; /* AT-emulator data */
+ spinlock_t readlock;
+} modem_info;
+
+#define ISDN_MODEM_WINSIZE 8
+
+/* Description of one ISDN-tty */
+typedef struct _isdn_modem {
+ int refcount; /* Number of opens */
+ struct tty_driver *tty_modem; /* tty-device */
+ struct tty_struct *modem_table[ISDN_MAX_CHANNELS]; /* ?? copied from Orig */
+ struct ktermios *modem_termios[ISDN_MAX_CHANNELS];
+ struct ktermios *modem_termios_locked[ISDN_MAX_CHANNELS];
+ modem_info info[ISDN_MAX_CHANNELS]; /* Private data */
+} isdn_modem_t;
+
+/*======================= End of ISDN-tty stuff ============================*/
+
+/*======================== Start of V.110 stuff ============================*/
+#define V110_BUFSIZE 1024
+
+typedef struct {
+ int nbytes; /* 1 Matrixbyte -> nbytes in stream */
+ int nbits; /* Number of used bits in streambyte */
+ unsigned char key; /* Bitmask in stream eg. 11 (nbits=2) */
+ int decodelen; /* Amount of data in decodebuf */
+ int SyncInit; /* Number of sync frames to send */
+ unsigned char *OnlineFrame; /* Precalculated V110 idle frame */
+ unsigned char *OfflineFrame; /* Precalculated V110 sync Frame */
+ int framelen; /* Length of frames */
+ int skbuser; /* Number of unacked userdata skbs */
+ int skbidle; /* Number of unacked idle/sync skbs */
+ int introducer; /* Local vars for decoder */
+ int dbit;
+ unsigned char b;
+ int skbres; /* space to reserve in outgoing skb */
+ int maxsize; /* maxbufsize of lowlevel driver */
+ unsigned char *encodebuf; /* temporary buffer for encoding */
+ unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices */
+} isdn_v110_stream;
+
+/*========================= End of V.110 stuff =============================*/
+
+/*======================= Start of general stuff ===========================*/
+
+typedef struct {
+ char *next;
+ char *private;
+} infostruct;
+
+#define DRV_FLAG_RUNNING 1
+#define DRV_FLAG_REJBUS 2
+#define DRV_FLAG_LOADED 4
+
+/* Description of hardware-level-driver */
+typedef struct _isdn_driver {
+ ulong online; /* Channel-Online flags */
+ ulong flags; /* Misc driver Flags */
+ int locks; /* Number of locks for this driver */
+ int channels; /* Number of channels */
+ wait_queue_head_t st_waitq; /* Wait-Queue for status-read's */
+ int maxbufsize; /* Maximum Buffersize supported */
+ unsigned long pktcount; /* Until now: unused */
+ int stavail; /* Chars avail on Status-device */
+ isdn_if *interface; /* Interface to driver */
+ int *rcverr; /* Error-counters for B-Ch.-receive */
+ int *rcvcount; /* Byte-counters for B-Ch.-receive */
+#ifdef CONFIG_ISDN_AUDIO
+ unsigned long DLEflag; /* Flags: Insert DLE at next read */
+#endif
+ struct sk_buff_head *rpqueue; /* Pointers to start of Rcv-Queue */
+ wait_queue_head_t *rcv_waitq; /* Wait-Queues for B-Channel-Reads */
+ wait_queue_head_t *snd_waitq; /* Wait-Queue for B-Channel-Send's */
+ char msn2eaz[10][ISDN_MSNLEN]; /* Mapping-Table MSN->EAZ */
+} isdn_driver_t;
+
+/* Main driver-data */
+typedef struct isdn_devt {
+ struct module *owner;
+ spinlock_t lock;
+ unsigned short flags; /* Bitmapped Flags: */
+ int drivers; /* Current number of drivers */
+ int channels; /* Current number of channels */
+ int net_verbose; /* Verbose-Flag */
+ int modempoll; /* Flag: tty-read active */
+ spinlock_t timerlock;
+ int tflags; /* Timer-Flags: */
+ /* see ISDN_TIMER_..defines */
+ int global_flags;
+ infostruct *infochain; /* List of open info-devs. */
+ wait_queue_head_t info_waitq; /* Wait-Queue for isdninfo */
+ struct timer_list timer; /* Misc.-function Timer */
+ int chanmap[ISDN_MAX_CHANNELS]; /* Map minor->device-channel */
+ int drvmap[ISDN_MAX_CHANNELS]; /* Map minor->driver-index */
+ int usage[ISDN_MAX_CHANNELS]; /* Used by tty/ip/voice */
+ char num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
+ /* Remote number of active ch.*/
+ int m_idx[ISDN_MAX_CHANNELS]; /* Index for mdm.... */
+ isdn_driver_t *drv[ISDN_MAX_DRIVERS]; /* Array of drivers */
+ isdn_net_dev *netdev; /* Linked list of net-if's */
+ char drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID */
+ struct task_struct *profd; /* For iprofd */
+ isdn_modem_t mdm; /* tty-driver-data */
+ isdn_net_dev *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers */
+ isdn_net_dev *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers */
+ ulong ibytes[ISDN_MAX_CHANNELS]; /* Statistics incoming bytes */
+ ulong obytes[ISDN_MAX_CHANNELS]; /* Statistics outgoing bytes */
+ int v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */
+ atomic_t v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */
+ isdn_v110_stream *v110[ISDN_MAX_CHANNELS]; /* V.110 private data */
+ struct mutex mtx; /* serialize list access*/
+ unsigned long global_features;
+} isdn_dev;
+
+extern isdn_dev *dev;
+
+
+#endif /* __ISDN_H__ */
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