/* $Id: isdnif.h,v 1.30 1999/08/23 15:54:29 keil Exp $ * * Linux ISDN subsystem * * Definition of the interface between the subsystem and its low-level drivers. * * Copyright 1994,95,96 by Fritz Elfert (fritz@wuemaus.franken.de) * Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg * * 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, 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, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Log: isdnif.h,v $ * Revision 1.30 1999/08/23 15:54:29 keil * more backported changes from kernel 2.3.14 * * Revision 1.29 1999/07/31 13:00:02 armin * Added tty fax capabilities. * * Revision 1.28 1999/07/13 20:57:48 werner * added callback ISDN_STAT_DISCH for limiting b-channel resources. * * Revision 1.27 1999/07/11 17:07:39 armin * Added tty modem register S23. * Added new layer 2 and 3 protocols for Fax and DSP functions. * * Revision 1.26 1999/07/01 08:35:44 keil * compatibility to 2.3 * * Revision 1.25 1998/06/17 19:51:55 he * merged with 2.1.10[34] (cosmetics and udelay() -> mdelay()) * brute force fix to avoid Ugh's in isdn_tty_write() * cleaned up some dead code * * Revision 1.24 1998/03/19 13:18:57 keil * Start of a CAPI like interface for supplementary Service * first service: SUSPEND * * Revision 1.23 1998/02/20 17:36:52 fritz * Added L2-protocols for V.110, changed FEATURE-Flag-constants. * * Revision 1.22 1998/01/31 22:14:12 keil * changes for 2.1.82 * * Revision 1.21 1997/10/09 21:28:13 fritz * New HL<->LL interface: * New BSENT callback with nr. of bytes included. * Sending without ACK. * New L1 error status (not yet in use). * Cleaned up obsolete structures. * Implemented Cisco-SLARP. * Changed local net-interface data to be dynamically allocated. * Removed old 2.0 compatibility stuff. * * Revision 1.20 1997/05/27 15:18:06 fritz * Added changes for recent 2.1.x kernels: * changed return type of isdn_close * queue_task_* -> queue_task * clear/set_bit -> test_and_... where apropriate. * changed type of hard_header_cache parameter. * * Revision 1.19 1997/03/25 23:13:56 keil * NI-1 US protocol * * Revision 1.18 1997/03/04 22:09:18 calle * Change macros copy_from_user and copy_to_user in inline function. * These are now correct replacements of the functions for 2.1.xx * * Revision 1.17 1997/02/10 21:12:53 fritz * More setup-interface changes. * * Revision 1.16 1997/02/10 19:42:57 fritz * New interface for reporting incoming calls. * * Revision 1.15 1997/02/09 00:18:42 keil * leased line support * * Revision 1.14 1997/02/03 23:43:00 fritz * Misc changes for Kernel 2.1.X compatibility. * * Revision 1.13 1996/11/13 02:39:59 fritz * More compatibility changes. * * Revision 1.12 1996/11/06 17:38:48 keil * more changes for 2.1.X * * Revision 1.11 1996/10/23 11:59:42 fritz * More compatibility changes. * * Revision 1.10 1996/10/22 23:14:19 fritz * Changes for compatibility to 2.0.X and 2.1.X kernels. * * Revision 1.9 1996/06/06 21:24:24 fritz * Started adding support for suspend/resume. * * Revision 1.8 1996/05/18 01:45:37 fritz * More spelling corrections. * * Revision 1.7 1996/05/18 01:37:19 fritz * Added spelling corrections and some minor changes * to stay in sync with kernel. * * Revision 1.6 1996/05/17 03:59:28 fritz * Marked rcvcallb and writebuf obsolete. * * Revision 1.5 1996/05/01 11:43:54 fritz * Removed STANDALONE * * Revision 1.4 1996/05/01 11:38:40 fritz * Added ISDN_FEATURE_L2_TRANS * * Revision 1.3 1996/04/29 22:57:54 fritz * Added driverId and channel parameters to * writecmd() and readstat(). * Added constant for voice-support. * * Revision 1.2 1996/04/20 17:02:40 fritz * Changes to support skbuffs for Lowlevel-Drivers. * Misc. typos * * Revision 1.1 1996/01/09 05:50:51 fritz * Initial revision * */ #ifndef isdnif_h #define isdnif_h #include #include /* * Values for general protocol-selection */ #define ISDN_PTYPE_UNKNOWN 0 /* Protocol undefined */ #define ISDN_PTYPE_1TR6 1 /* german 1TR6-protocol */ #define ISDN_PTYPE_EURO 2 /* EDSS1-protocol */ #define ISDN_PTYPE_LEASED 3 /* for leased lines */ #define ISDN_PTYPE_NI1 4 /* US NI-1 protocol */ #define ISDN_PTYPE_MAX 7 /* Max. 8 Protocols */ /* * Values for Layer-2-protocol-selection */ #define ISDN_PROTO_L2_X75I 0 /* X75/LAPB with I-Frames */ #define ISDN_PROTO_L2_X75UI 1 /* X75/LAPB with UI-Frames */ #define ISDN_PROTO_L2_X75BUI 2 /* X75/LAPB with UI-Frames */ #define ISDN_PROTO_L2_HDLC 3 /* HDLC */ #define ISDN_PROTO_L2_TRANS 4 /* Transparent (Voice) */ #define ISDN_PROTO_L2_X25DTE 5 /* X25/LAPB DTE mode */ #define ISDN_PROTO_L2_X25DCE 6 /* X25/LAPB DCE mode */ #define ISDN_PROTO_L2_V11096 7 /* V.110 bitrate adaption 9600 Baud */ #define ISDN_PROTO_L2_V11019 8 /* V.110 bitrate adaption 19200 Baud */ #define ISDN_PROTO_L2_V11038 9 /* V.110 bitrate adaption 38400 Baud */ #define ISDN_PROTO_L2_MODEM 10 /* Analog Modem on Board */ #define ISDN_PROTO_L2_FAX 11 /* Fax Group 2/3 */ #define ISDN_PROTO_L2_MAX 15 /* Max. 16 Protocols */ /* * Values for Layer-3-protocol-selection */ #define ISDN_PROTO_L3_TRANS 0 /* Transparent */ #define ISDN_PROTO_L3_TRANSDSP 1 /* Transparent with DSP */ #define ISDN_PROTO_L3_FAX 2 /* Fax Group 2/3 */ #define ISDN_PROTO_L3_MAX 7 /* Max. 8 Protocols */ #ifdef __KERNEL__ #include /***************************************************************************/ /* Extensions made by Werner Cornelius (werner@ikt.de) */ /* */ /* The proceed command holds a incoming call in a state to leave processes */ /* enough time to check whether ist should be accepted. */ /* The PROT_IO Command extends the interface to make protocol dependant */ /* features available (call diversion, call waiting...). */ /* */ /* The PROT_IO Command is executed with the desired driver id and the arg */ /* parameter coded as follows: */ /* The lower 8 bits of arg contain the desired protocol from ISDN_PTYPE */ /* definitions. The upper 24 bits represent the protocol specific cmd/stat.*/ /* Any additional data is protocol and command specific. */ /* This mechanism also applies to the statcallb callback STAT_PROT. */ /* */ /* This suggested extension permits an easy expansion of protocol specific */ /* handling. Extensions may be added at any time without changing the HL */ /* driver code and not getting conflicts without certifications. */ /* The well known CAPI 2.0 interface handles such extensions in a similar */ /* way. Perhaps a protocol specific module may be added and separately */ /* loaded and linked to the basic isdn module for handling. */ /***************************************************************************/ /*****************/ /* DSS1 commands */ /*****************/ #define DSS1_CMD_INVOKE ((0x00 << 8) | ISDN_PTYPE_EURO) /* invoke a supplementary service */ #define DSS1_CMD_INVOKE_ABORT ((0x01 << 8) | ISDN_PTYPE_EURO) /* abort a invoke cmd */ /*******************************/ /* DSS1 Status callback values */ /*******************************/ #define DSS1_STAT_INVOKE_RES ((0x80 << 8) | ISDN_PTYPE_EURO) /* Result for invocation */ #define DSS1_STAT_INVOKE_ERR ((0x81 << 8) | ISDN_PTYPE_EURO) /* Error Return for invocation */ #define DSS1_STAT_INVOKE_BRD ((0x82 << 8) | ISDN_PTYPE_EURO) /* Deliver invoke broadcast info */ /*********************************************************************/ /* structures for DSS1 commands and callback */ /* */ /* An action is invoked by sending a DSS1_CMD_INVOKE. The ll_id, proc*/ /* timeout, datalen and data fields must be set before calling. */ /* */ /* The return value is a positive hl_id value also delivered in the */ /* hl_id field. A value of zero signals no more left hl_id capacitys.*/ /* A negative return value signals errors in LL. So if the return */ /* value is <= 0 no action in LL will be taken -> request ignored */ /* */ /* The timeout field must be filled with a positive value specifying */ /* the amount of time the INVOKED process waits for a reaction from */ /* the network. */ /* If a response (either error or result) is received during this */ /* intervall, a reporting callback is initiated and the process will */ /* be deleted, the hl identifier will be freed. */ /* If no response is received during the specified intervall, a error*/ /* callback is initiated with timeout set to -1 and a datalen set */ /* to 0. */ /* If timeout is set to a value <= 0 during INVOCATION the process is*/ /* immediately deleted after sending the data. No callback occurs ! */ /* */ /* A currently waiting process may be aborted with INVOKE_ABORT. No */ /* callback will occur when a process has been aborted. */ /* */ /* Broadcast invoke frames from the network are reported via the */ /* STAT_INVOKE_BRD callback. The ll_id is set to 0, the other fields */ /* are supplied by the network and not by the HL. */ /*********************************************************************/ typedef struct { ulong ll_id; /* ID supplied by LL when executing */ /* a command and returned by HL for */ /* INVOKE_RES and INVOKE_ERR */ int hl_id; /* ID supplied by HL when called */ /* for executing a cmd and delivered */ /* for results and errors */ /* must be supplied by LL when aborting*/ int proc; /* invoke procedure used by CMD_INVOKE */ /* returned by callback and broadcast */ int timeout; /* timeout for INVOKE CMD in ms */ /* -1 in stat callback when timed out */ /* error value when error callback */ int datalen; /* length of cmd or stat data */ u_char *data;/* pointer to data delivered or send */ } dss1_cmd_stat; /* * Commands from linklevel to lowlevel * */ #define ISDN_CMD_IOCTL 0 /* Perform ioctl */ #define ISDN_CMD_DIAL 1 /* Dial out */ #define ISDN_CMD_ACCEPTD 2 /* Accept an incoming call on D-Chan. */ #define ISDN_CMD_ACCEPTB 3 /* Request B-Channel connect. */ #define ISDN_CMD_HANGUP 4 /* Hangup */ #define ISDN_CMD_CLREAZ 5 /* Clear EAZ(s) of channel */ #define ISDN_CMD_SETEAZ 6 /* Set EAZ(s) of channel */ #define ISDN_CMD_GETEAZ 7 /* Get EAZ(s) of channel */ #define ISDN_CMD_SETSIL 8 /* Set Service-Indicator-List of channel */ #define ISDN_CMD_GETSIL 9 /* Get Service-Indicator-List of channel */ #define ISDN_CMD_SETL2 10 /* Set B-Chan. Layer2-Parameter */ #define ISDN_CMD_GETL2 11 /* Get B-Chan. Layer2-Parameter */ #define ISDN_CMD_SETL3 12 /* Set B-Chan. Layer3-Parameter */ #define ISDN_CMD_GETL3 13 /* Get B-Chan. Layer3-Parameter */ #define ISDN_CMD_LOCK 14 /* Signal usage by upper levels */ #define ISDN_CMD_UNLOCK 15 /* Release usage-lock */ #define ISDN_CMD_SUSPEND 16 /* Suspend connection */ #define ISDN_CMD_RESUME 17 /* Resume connection */ #define ISDN_CMD_PROCEED 18 /* Proceed with call establishment */ #define ISDN_CMD_ALERT 19 /* Alert after Proceeding */ #define ISDN_CMD_REDIR 20 /* Redir a incoming call */ #define ISDN_CMD_PROT_IO 21 /* Protocol specific commands */ #define CAPI_PUT_MESSAGE 22 /* CAPI message send down or up */ #define ISDN_CMD_FAXCMD 23 /* FAX commands to HL-driver */ #define ISDN_CMD_AUDIO 24 /* DSP, DTMF, ... settings */ /* * Status-Values delivered from lowlevel to linklevel via * statcallb(). * */ #define ISDN_STAT_STAVAIL 256 /* Raw status-data available */ #define ISDN_STAT_ICALL 257 /* Incoming call detected */ #define ISDN_STAT_RUN 258 /* Signal protocol-code is running */ #define ISDN_STAT_STOP 259 /* Signal halt of protocol-code */ #define ISDN_STAT_DCONN 260 /* Signal D-Channel connect */ #define ISDN_STAT_BCONN 261 /* Signal B-Channel connect */ #define ISDN_STAT_DHUP 262 /* Signal D-Channel disconnect */ #define ISDN_STAT_BHUP 263 /* Signal B-Channel disconnect */ #define ISDN_STAT_CINF 264 /* Charge-Info */ #define ISDN_STAT_LOAD 265 /* Signal new lowlevel-driver is loaded */ #define ISDN_STAT_UNLOAD 266 /* Signal unload of lowlevel-driver */ #define ISDN_STAT_BSENT 267 /* Signal packet sent */ #define ISDN_STAT_NODCH 268 /* Signal no D-Channel */ #define ISDN_STAT_ADDCH 269 /* Add more Channels */ #define ISDN_STAT_CAUSE 270 /* Cause-Message */ #define ISDN_STAT_ICALLW 271 /* Incoming call without B-chan waiting */ #define ISDN_STAT_REDIR 272 /* Redir result */ #define ISDN_STAT_PROT 273 /* protocol IO specific callback */ #define ISDN_STAT_DISPLAY 274 /* deliver a received display message */ #define ISDN_STAT_L1ERR 275 /* Signal Layer-1 Error */ #define ISDN_STAT_FAXIND 276 /* FAX indications from HL-driver */ #define ISDN_STAT_AUDIO 277 /* DTMF, DSP indications */ #define ISDN_STAT_DISCH 278 /* Disable/Enable channel usage */ /* * Audio commands */ #define ISDN_AUDIO_SETDD 0 /* Set DTMF detection */ #define ISDN_AUDIO_DTMF 1 /* Rx/Tx DTMF */ /* * Values for errcode field */ #define ISDN_STAT_L1ERR_SEND 1 #define ISDN_STAT_L1ERR_RECV 2 /* * Values for feature-field of interface-struct. */ /* Layer 2 */ #define ISDN_FEATURE_L2_X75I (0x0001 << ISDN_PROTO_L2_X75I) #define ISDN_FEATURE_L2_X75UI (0x0001 << ISDN_PROTO_L2_X75UI) #define ISDN_FEATURE_L2_X75BUI (0x0001 << ISDN_PROTO_L2_X75BUI) #define ISDN_FEATURE_L2_HDLC (0x0001 << ISDN_PROTO_L2_HDLC) #define ISDN_FEATURE_L2_TRANS (0x0001 << ISDN_PROTO_L2_TRANS) #define ISDN_FEATURE_L2_X25DTE (0x0001 << ISDN_PROTO_L2_X25DTE) #define ISDN_FEATURE_L2_X25DCE (0x0001 << ISDN_PROTO_L2_X25DCE) #define ISDN_FEATURE_L2_V11096 (0x0001 << ISDN_PROTO_L2_V11096) #define ISDN_FEATURE_L2_V11019 (0x0001 << ISDN_PROTO_L2_V11019) #define ISDN_FEATURE_L2_V11038 (0x0001 << ISDN_PROTO_L2_V11038) #define ISDN_FEATURE_L2_MODEM (0x0001 << ISDN_PROTO_L2_MODEM) #define ISDN_FEATURE_L2_FAX (0x0001 << ISDN_PROTO_L2_FAX) #define ISDN_FEATURE_L2_MASK (0x0FFFF) /* Max. 16 protocols */ #define ISDN_FEATURE_L2_SHIFT (0) /* Layer 3 */ #define ISDN_FEATURE_L3_TRANS (0x10000 << ISDN_PROTO_L3_TRANS) #define ISDN_FEATURE_L3_TRANSDSP (0x10000 << ISDN_PROTO_L3_TRANSDSP) #define ISDN_FEATURE_L3_FAX (0x10000 << ISDN_PROTO_L3_FAX) #define ISDN_FEATURE_L3_MASK (0x0FF0000) /* Max. 8 Protocols */ #define ISDN_FEATURE_L3_SHIFT (16) /* Signaling */ #define ISDN_FEATURE_P_UNKNOWN (0x1000000 << ISDN_PTYPE_UNKNOWN) #define ISDN_FEATURE_P_1TR6 (0x1000000 << ISDN_PTYPE_1TR6) #define ISDN_FEATURE_P_EURO (0x1000000 << ISDN_PTYPE_EURO) #define ISDN_FEATURE_P_NI1 (0x1000000 << ISDN_PTYPE_NI1) #define ISDN_FEATURE_P_MASK (0x0FF000000) /* Max. 8 Protocols */ #define ISDN_FEATURE_P_SHIFT (24) typedef struct setup_parm { unsigned char phone[32]; /* Remote Phone-Number */ unsigned char eazmsn[32]; /* Local EAZ or MSN */ unsigned char si1; /* Service Indicator 1 */ unsigned char si2; /* Service Indicator 2 */ unsigned char plan; /* Numbering plan */ unsigned char screen; /* Screening info */ } setup_parm; #ifdef CONFIG_ISDN_TTY_FAX /* T.30 Fax G3 */ #define FAXIDLEN 21 typedef struct T30_s { /* session parameters */ __u8 resolution __attribute__ ((packed)); __u8 rate __attribute__ ((packed)); __u8 width __attribute__ ((packed)); __u8 length __attribute__ ((packed)); __u8 compression __attribute__ ((packed)); __u8 ecm __attribute__ ((packed)); __u8 binary __attribute__ ((packed)); __u8 scantime __attribute__ ((packed)); __u8 id[FAXIDLEN] __attribute__ ((packed)); /* additional parameters */ __u8 phase __attribute__ ((packed)); __u8 direction __attribute__ ((packed)); __u8 code __attribute__ ((packed)); __u8 badlin __attribute__ ((packed)); __u8 badmul __attribute__ ((packed)); __u8 bor __attribute__ ((packed)); __u8 fet __attribute__ ((packed)); __u8 pollid[FAXIDLEN] __attribute__ ((packed)); __u8 cq __attribute__ ((packed)); __u8 cr __attribute__ ((packed)); __u8 ctcrty __attribute__ ((packed)); __u8 minsp __attribute__ ((packed)); __u8 phcto __attribute__ ((packed)); __u8 rel __attribute__ ((packed)); __u8 nbc __attribute__ ((packed)); /* remote station parameters */ __u8 r_resolution __attribute__ ((packed)); __u8 r_rate __attribute__ ((packed)); __u8 r_width __attribute__ ((packed)); __u8 r_length __attribute__ ((packed)); __u8 r_compression __attribute__ ((packed)); __u8 r_ecm __attribute__ ((packed)); __u8 r_binary __attribute__ ((packed)); __u8 r_scantime __attribute__ ((packed)); __u8 r_id[FAXIDLEN] __attribute__ ((packed)); __u8 r_code __attribute__ ((packed)); } T30_s; #define ISDN_TTY_FAX_CONN_IN 0 #define ISDN_TTY_FAX_CONN_OUT 1 #define ISDN_TTY_FAX_FCON 0 #define ISDN_TTY_FAX_DIS 1 #define ISDN_TTY_FAX_FTT 2 #define ISDN_TTY_FAX_MCF 3 #define ISDN_TTY_FAX_DCS 4 #define ISDN_TTY_FAX_TRAIN_OK 5 #define ISDN_TTY_FAX_EOP 6 #define ISDN_TTY_FAX_EOM 7 #define ISDN_TTY_FAX_MPS 8 #define ISDN_TTY_FAX_DTC 9 #define ISDN_TTY_FAX_RID 10 #define ISDN_TTY_FAX_HNG 11 #define ISDN_TTY_FAX_DT 12 #define ISDN_TTY_FAX_FCON_I 13 #define ISDN_TTY_FAX_DR 14 #define ISDN_TTY_FAX_ET 15 #define ISDN_TTY_FAX_CFR 16 #define ISDN_TTY_FAX_PTS 17 #define ISDN_TTY_FAX_SENT 18 #define ISDN_FAX_PHASE_IDLE 0 #define ISDN_FAX_PHASE_A 1 #define ISDN_FAX_PHASE_B 2 #define ISDN_FAX_PHASE_C 3 #define ISDN_FAX_PHASE_D 4 #define ISDN_FAX_PHASE_E 5 #endif /* TTY_FAX */ /* CAPI structs */ /* this is compatible to the old union size */ #define MAX_CAPI_PARA_LEN 50 typedef struct { /* Header */ __u16 Length; __u16 ApplId; __u8 Command; __u8 Subcommand; __u16 Messagenumber; /* Parameter */ union { __u32 Controller; __u32 PLCI; __u32 NCCI; } adr; __u8 para[MAX_CAPI_PARA_LEN]; } capi_msg; /* * Structure for exchanging above infos * */ typedef struct { int driver; /* Lowlevel-Driver-ID */ int command; /* Command or Status (see above) */ ulong arg; /* Additional Data */ union { ulong errcode; /* Type of error with STAT_L1ERR */ int length; /* Amount of bytes sent with STAT_BSENT */ u_char num[50];/* Additional Data */ setup_parm setup;/* For SETUP msg */ capi_msg cmsg; /* For CAPI like messages */ char display[85];/* display message data */ dss1_cmd_stat dss1_io; /* DSS1 IO-parameter/result */ #ifdef CONFIG_ISDN_TTY_FAX T30_s *fax; /* Pointer to ttys fax struct */ #endif } parm; } isdn_ctrl; /* * The interface-struct itself (initialized at load-time of lowlevel-driver) * * See Documentation/isdn/INTERFACE for a description, how the communication * between the ISDN subsystem and its drivers is done. * */ typedef struct { /* Number of channels supported by this driver */ int channels; /* * Maximum Size of transmit/receive-buffer this driver supports. */ int maxbufsize; /* Feature-Flags for this driver. * See defines ISDN_FEATURE_... for Values */ unsigned long features; /* * Needed for calculating * dev->hard_header_len = linklayer header + hl_hdrlen; * Drivers, not supporting sk_buff's should set this to 0. */ unsigned short hl_hdrlen; /* * Receive-Callback using sk_buff's * Parameters: * int Driver-ID * int local channel-number (0 ...) * struct sk_buff *skb received Data */ void (*rcvcallb_skb)(int, int, struct sk_buff *); /* Status-Callback * Parameters: * isdn_ctrl* * driver = Driver ID. * command = One of above ISDN_STAT_... constants. * arg = depending on status-type. * num = depending on status-type. */ int (*statcallb)(isdn_ctrl*); /* Send command * Parameters: * isdn_ctrl* * driver = Driver ID. * command = One of above ISDN_CMD_... constants. * arg = depending on command. * num = depending on command. */ int (*command)(isdn_ctrl*); /* * Send data using sk_buff's * Parameters: * int driverId * int local channel-number (0...) * int Flag: Need ACK for this packet. * struct sk_buff *skb Data to send */ int (*writebuf_skb) (int, int, int, struct sk_buff *); /* Send raw D-Channel-Commands * Parameters: * u_char pointer data * int length of data * int Flag: 0 = Call form Kernel-Space (use memcpy, * no schedule allowed) * 1 = Data is in User-Space (use memcpy_fromfs, * may schedule) * int driverId * int local channel-number (0 ...) */ int (*writecmd)(const u_char*, int, int, int, int); /* Read raw Status replies * u_char pointer data (volatile) * int length of buffer * int Flag: 0 = Call form Kernel-Space (use memcpy, * no schedule allowed) * 1 = Data is in User-Space (use memcpy_fromfs, * may schedule) * int driverId * int local channel-number (0 ...) */ int (*readstat)(u_char*, int, int, int, int); char id[20]; } isdn_if; /* * Function which must be called by lowlevel-driver at loadtime with * the following fields of above struct set: * * channels Number of channels that will be supported. * hl_hdrlen Space to preserve in sk_buff's when sending. Drivers, not * supporting sk_buff's should set this to 0. * command Address of Command-Handler. * features Bitwise coded Features of this driver. (use ISDN_FEATURE_...) * writebuf_skb Address of Skbuff-Send-Handler. * writecmd " " D-Channel " which accepts raw D-Ch-Commands. * readstat " " D-Channel " which delivers raw Status-Data. * * The linklevel-driver fills the following fields: * * channels Driver-ID assigned to this driver. (Must be used on all * subsequent callbacks. * rcvcallb_skb Address of handler for received Skbuff's. * statcallb " " " for status-changes. * */ extern int register_isdn(isdn_if*); #include #endif /* __KERNEL__ */ #endif /* isdnif_h */