/*****************************************************************************
* wanrouter.h        Definitions for the WAN Multiprotocol Router Module.
*                This module provides API and common services for WAN Link
*                Drivers and is completely hardware-independent.
*
* Author:         Nenad Corbic <ncorbic@sangoma.com>
*                Gideon Hack         
* Additions:        Arnaldo Melo
*
* Copyright:        (c) 1995-2000 Sangoma Technologies Inc.
*
*                This program is free software; you can redistribute it and/or
*                modify it under the terms of the GNU General Public License
*                as published by the Free Software Foundation; either version
*                2 of the License, or (at your option) any later version.
* ============================================================================
* Jul 21, 2000  Nenad Corbic        Added WAN_FT1_READY State
* Feb 24, 2000  Nenad Corbic    Added support for socket based x25api
* Jan 28, 2000  Nenad Corbic    Added support for the ASYNC protocol.
* Oct 04, 1999  Nenad Corbic         Updated for 2.1.0 release
* Jun 02, 1999  Gideon Hack        Added support for the S514 adapter.
* May 23, 1999        Arnaldo Melo        Added local_addr to wanif_conf_t
*                                WAN_DISCONNECTING state added
* Jul 20, 1998        David Fong        Added Inverse ARP options to 'wanif_conf_t'
* Jun 12, 1998        David Fong        Added Cisco HDLC support.
* Dec 16, 1997        Jaspreet Singh        Moved 'enable_IPX' and 'network_number' to
*                                'wanif_conf_t'
* Dec 05, 1997        Jaspreet Singh        Added 'pap', 'chap' to 'wanif_conf_t'
*                                Added 'authenticator' to 'wan_ppp_conf_t'
* Nov 06, 1997        Jaspreet Singh        Changed Router Driver version to 1.1 from 1.0
* Oct 20, 1997        Jaspreet Singh        Added 'cir','bc','be' and 'mc' to 'wanif_conf_t'
*                                Added 'enable_IPX' and 'network_number' to 
*                                'wan_device_t'.  Also added defines for
*                                UDP PACKET TYPE, Interrupt test, critical values
*                                for RACE conditions.
* Oct 05, 1997        Jaspreet Singh        Added 'dlci_num' and 'dlci[100]' to 
*                                'wan_fr_conf_t' to configure a list of dlci(s)
*                                for a NODE 
* Jul 07, 1997        Jaspreet Singh        Added 'ttl' to 'wandev_conf_t' & 'wan_device_t'
* May 29, 1997         Jaspreet Singh        Added 'tx_int_enabled' to 'wan_device_t'
* May 21, 1997        Jaspreet Singh        Added 'udp_port' to 'wan_device_t'
* Apr 25, 1997  Farhan Thawar   Added 'udp_port' to 'wandev_conf_t'
* Jan 16, 1997        Gene Kozin        router_devlist made public
* Jan 02, 1997        Gene Kozin        Initial version (based on wanpipe.h).
*****************************************************************************/

#ifndef        _ROUTER_H
#define        _ROUTER_H

#define        ROUTER_NAME        "wanrouter"        /* in case we ever change it */
#define        ROUTER_VERSION        1                /* version number */
#define        ROUTER_RELEASE        1                /* release (minor version) number */
#define        ROUTER_IOCTL        'W'                /* for IOCTL calls */
#define        ROUTER_MAGIC        0x524D4157L        /* signature: 'WANR' reversed */

/* IOCTL codes for /proc/router/<device> entries (up to 255) */
enum router_ioctls
{
        ROUTER_SETUP        = ROUTER_IOCTL<<8,        /* configure device */
        ROUTER_DOWN,                                /* shut down device */
        ROUTER_STAT,                                /* get device status */
        ROUTER_IFNEW,                                /* add interface */
        ROUTER_IFDEL,                                /* delete interface */
        ROUTER_IFSTAT,                                /* get interface status */
        ROUTER_USER        = (ROUTER_IOCTL<<8)+16,        /* driver-specific calls */
        ROUTER_USER_MAX        = (ROUTER_IOCTL<<8)+31
};

/* identifiers for displaying proc file data for dual port adapters */
#define PROC_DATA_PORT_0 0x8000        /* the data is for port 0 */
#define PROC_DATA_PORT_1 0x8001        /* the data is for port 1 */

/* NLPID for packet encapsulation (ISO/IEC TR 9577) */
#define        NLPID_IP        0xCC        /* Internet Protocol Datagram */
#define        NLPID_SNAP        0x80        /* IEEE Subnetwork Access Protocol */
#define        NLPID_CLNP        0x81        /* ISO/IEC 8473 */
#define        NLPID_ESIS        0x82        /* ISO/IEC 9542 */
#define        NLPID_ISIS        0x83        /* ISO/IEC ISIS */
#define        NLPID_Q933        0x08        /* CCITT Q.933 */

/* Miscellaneous */
#define        WAN_IFNAME_SZ        15        /* max length of the interface name */
#define        WAN_DRVNAME_SZ        15        /* max length of the link driver name */
#define        WAN_ADDRESS_SZ        31        /* max length of the WAN media address */
#define USED_BY_FIELD        8        /* max length of the used by field */

/* Defines for UDP PACKET TYPE */
#define UDP_PTPIPE_TYPE         0x01
#define UDP_FPIPE_TYPE                0x02
#define UDP_CPIPE_TYPE                0x03
#define UDP_DRVSTATS_TYPE         0x04
#define UDP_INVALID_TYPE          0x05

/* Command return code */
#define CMD_OK                0                /* normal firmware return code */
#define CMD_TIMEOUT        0xFF                /* firmware command timed out */

/* UDP Packet Management */
#define UDP_PKT_FRM_STACK        0x00
#define UDP_PKT_FRM_NETWORK        0x01

/* Maximum interrupt test counter */
#define MAX_INTR_TEST_COUNTER        100

/* Critical Values for RACE conditions*/
#define CRITICAL_IN_ISR                0xA1
#define CRITICAL_INTR_HANDLED        0xB1

/****** Data Types **********************************************************/

/*----------------------------------------------------------------------------
 * X.25-specific link-level configuration.
 */
typedef struct wan_x25_conf
{
        unsigned lo_pvc;        /* lowest permanent circuit number */
        unsigned hi_pvc;        /* highest permanent circuit number */
        unsigned lo_svc;        /* lowest switched circuit number */
        unsigned hi_svc;        /* highest switched circuit number */
        unsigned hdlc_window;        /* HDLC window size (1..7) */
        unsigned pkt_window;        /* X.25 packet window size (1..7) */
        unsigned t1;                /* HDLC timer T1, sec (1..30) */
        unsigned t2;                /* HDLC timer T2, sec (0..29) */
        unsigned t4;                /* HDLC supervisory frame timer = T4 * T1 */
        unsigned n2;                /* HDLC retransmission limit (1..30) */
        unsigned t10_t20;        /* X.25 RESTART timeout, sec (1..255) */
        unsigned t11_t21;        /* X.25 CALL timeout, sec (1..255) */
        unsigned t12_t22;        /* X.25 RESET timeout, sec (1..255) */
        unsigned t13_t23;        /* X.25 CLEAR timeout, sec (1..255) */
        unsigned t16_t26;        /* X.25 INTERRUPT timeout, sec (1..255) */
        unsigned t28;                /* X.25 REGISTRATION timeout, sec (1..255) */
        unsigned r10_r20;        /* RESTART retransmission limit (0..250) */
        unsigned r12_r22;        /* RESET retransmission limit (0..250) */
        unsigned r13_r23;        /* CLEAR retransmission limit (0..250) */
        unsigned ccitt_compat;        /* compatibility mode: 1988/1984/1980 */
        unsigned x25_conf_opt;   /* User defined x25 config optoins */
        unsigned char LAPB_hdlc_only; /* Run in HDLC only mode */
        unsigned char logging;   /* Control connection logging */  
        unsigned char oob_on_modem; /* Whether to send modem status to the user app */
} wan_x25_conf_t;

/*----------------------------------------------------------------------------
 * Frame relay specific link-level configuration.
 */
typedef struct wan_fr_conf
{
        unsigned signalling;        /* local in-channel signalling type */
        unsigned t391;                /* link integrity verification timer */
        unsigned t392;                /* polling verification timer */
        unsigned n391;                /* full status polling cycle counter */
        unsigned n392;                /* error threshold counter */
        unsigned n393;                /* monitored events counter */
        unsigned dlci_num;        /* number of DLCs (access node) */
        unsigned  dlci[100];    /* List of all DLCIs */
} wan_fr_conf_t;

/*----------------------------------------------------------------------------
 * PPP-specific link-level configuration.
 */
typedef struct wan_ppp_conf
{
        unsigned restart_tmr;        /* restart timer */
        unsigned auth_rsrt_tmr;        /* authentication timer */
        unsigned auth_wait_tmr;        /* authentication timer */
        unsigned mdm_fail_tmr;        /* modem failure timer */
        unsigned dtr_drop_tmr;        /* DTR drop timer */
        unsigned connect_tmout;        /* connection timeout */
        unsigned conf_retry;        /* max. retry */
        unsigned term_retry;        /* max. retry */
        unsigned fail_retry;        /* max. retry */
        unsigned auth_retry;        /* max. retry */
        unsigned auth_options;        /* authentication opt. */
        unsigned ip_options;        /* IP options */
        char        authenticator;        /* AUTHENTICATOR or not */
        char        ip_mode;        /* Static/Host/Peer */
} wan_ppp_conf_t;

/*----------------------------------------------------------------------------
 * CHDLC-specific link-level configuration.
 */
typedef struct wan_chdlc_conf
{
        unsigned char ignore_dcd;        /* Protocol options:                */
        unsigned char ignore_cts;        /*  Ignore these to determine        */
        unsigned char ignore_keepalive;        /*  link status (Yes or No)        */
        unsigned char hdlc_streaming;        /*  hdlc_streaming mode (Y/N) */
        unsigned char receive_only;        /*  no transmit buffering (Y/N) */
        unsigned keepalive_tx_tmr;        /* transmit keepalive timer */
        unsigned keepalive_rx_tmr;        /* receive  keepalive timer */
        unsigned keepalive_err_margin;        /* keepalive_error_tolerance */
        unsigned slarp_timer;                /* SLARP request timer */
} wan_chdlc_conf_t;


/*----------------------------------------------------------------------------
 * WAN device configuration. Passed to ROUTER_SETUP IOCTL.
 */
typedef struct wandev_conf
{
        unsigned magic;                /* magic number (for verification) */
        unsigned config_id;        /* configuration structure identifier */
                                /****** hardware configuration ******/
        unsigned ioport;        /* adapter I/O port base */
        unsigned long maddr;        /* dual-port memory address */
        unsigned msize;                /* dual-port memory size */
        int irq;                /* interrupt request level */
        int dma;                /* DMA request level */
        char S514_CPU_no[1];        /* S514 PCI adapter CPU number ('A' or 'B') */
        unsigned PCI_slot_no;        /* S514 PCI adapter slot number */
        char auto_pci_cfg;        /* S515 PCI automatic slot detection */
        char comm_port;                /* Communication Port (PRI=0, SEC=1) */ 
        unsigned bps;                /* data transfer rate */
        unsigned mtu;                /* maximum transmit unit size */
        unsigned udp_port;      /* UDP port for management */
        unsigned char ttl;        /* Time To Live for UDP security */
        unsigned char ft1;        /* FT1 Configurator Option */
        char interface;                /* RS-232/V.35, etc. */
        char clocking;                /* external/internal */
        char line_coding;        /* NRZ/NRZI/FM0/FM1, etc. */
        char station;                /* DTE/DCE, primary/secondary, etc. */
        char connection;        /* permanent/switched/on-demand */
        char read_mode;                /* read mode: Polling or interrupt */
        char receive_only;        /* disable tx buffers */
        char tty;                /* Create a fake tty device */
        unsigned tty_major;        /* Major number for wanpipe tty device */
        unsigned tty_minor;         /* Minor number for wanpipe tty device */
        unsigned tty_mode;        /* TTY operation mode SYNC or ASYNC */
        char backup;                /* Backup Mode */
        unsigned hw_opt[4];        /* other hardware options */
        unsigned reserved[4];
                                /****** arbitrary data ***************/
        unsigned data_size;        /* data buffer size */
        void* data;                /* data buffer, e.g. firmware */
        union                        /****** protocol-specific ************/
        {
                wan_x25_conf_t x25;        /* X.25 configuration */
                wan_ppp_conf_t ppp;        /* PPP configuration */
                wan_fr_conf_t fr;        /* frame relay configuration */
                wan_chdlc_conf_t chdlc;        /* Cisco HDLC configuration */
        } u;
} wandev_conf_t;

/* 'config_id' definitions */
#define        WANCONFIG_X25        101        /* X.25 link */
#define        WANCONFIG_FR        102        /* frame relay link */
#define        WANCONFIG_PPP        103        /* synchronous PPP link */
#define WANCONFIG_CHDLC        104        /* Cisco HDLC Link */
#define WANCONFIG_BSC        105        /* BiSync Streaming */
#define WANCONFIG_HDLC        106        /* HDLC Support */
#define WANCONFIG_MPPP  107        /* Multi Port PPP over RAW CHDLC */

/*
 * Configuration options defines.
 */
/* general options */
#define        WANOPT_OFF        0
#define        WANOPT_ON        1
#define        WANOPT_NO        0
#define        WANOPT_YES        1

/* intercace options */
#define        WANOPT_RS232        0
#define        WANOPT_V35        1

/* data encoding options */
#define        WANOPT_NRZ        0
#define        WANOPT_NRZI        1
#define        WANOPT_FM0        2
#define        WANOPT_FM1        3

/* link type options */
#define        WANOPT_POINTTOPOINT        0        /* RTS always active */
#define        WANOPT_MULTIDROP        1        /* RTS is active when transmitting */

/* clocking options */
#define        WANOPT_EXTERNAL        0
#define        WANOPT_INTERNAL        1

/* station options */
#define        WANOPT_DTE                0
#define        WANOPT_DCE                1
#define        WANOPT_CPE                0
#define        WANOPT_NODE                1
#define        WANOPT_SECONDARY        0
#define        WANOPT_PRIMARY                1

/* connection options */
#define        WANOPT_PERMANENT        0        /* DTR always active */
#define        WANOPT_SWITCHED                1        /* use DTR to setup link (dial-up) */
#define        WANOPT_ONDEMAND                2        /* activate DTR only before sending */

/* frame relay in-channel signalling */
#define        WANOPT_FR_ANSI                1        /* ANSI T1.617 Annex D */
#define        WANOPT_FR_Q933                2        /* ITU Q.933A */
#define        WANOPT_FR_LMI                3        /* LMI */

/* PPP IP Mode Options */
#define        WANOPT_PPP_STATIC        0
#define        WANOPT_PPP_HOST                1
#define        WANOPT_PPP_PEER                2

/* ASY Mode Options */
#define WANOPT_ONE                 1
#define WANOPT_TWO                2
#define WANOPT_ONE_AND_HALF        3

#define WANOPT_NONE        0
#define WANOPT_ODD      1
#define WANOPT_EVEN        2

/* CHDLC Protocol Options */
/* DF Commmented out for now.

#define WANOPT_CHDLC_NO_DCD                IGNORE_DCD_FOR_LINK_STAT
#define WANOPT_CHDLC_NO_CTS                IGNORE_CTS_FOR_LINK_STAT
#define WANOPT_CHDLC_NO_KEEPALIVE        IGNORE_KPALV_FOR_LINK_STAT
*/

/* Port options */
#define WANOPT_PRI 0
#define WANOPT_SEC 1
/* read mode */
#define        WANOPT_INTR        0
#define WANOPT_POLL        1


#define WANOPT_TTY_SYNC  0
#define WANOPT_TTY_ASYNC 1
/*----------------------------------------------------------------------------
 * WAN Link Status Info (for ROUTER_STAT IOCTL).
 */
typedef struct wandev_stat
{
        unsigned state;                /* link state */
        unsigned ndev;                /* number of configured interfaces */

        /* link/interface configuration */
        unsigned connection;        /* permanent/switched/on-demand */
        unsigned media_type;        /* Frame relay/PPP/X.25/SDLC, etc. */
        unsigned mtu;                /* max. transmit unit for this device */

        /* physical level statistics */
        unsigned modem_status;        /* modem status */
        unsigned rx_frames;        /* received frames count */
        unsigned rx_overruns;        /* receiver overrun error count */
        unsigned rx_crc_err;        /* receive CRC error count */
        unsigned rx_aborts;        /* received aborted frames count */
        unsigned rx_bad_length;        /* unexpetedly long/short frames count */
        unsigned rx_dropped;        /* frames discarded at device level */
        unsigned tx_frames;        /* transmitted frames count */
        unsigned tx_underruns;        /* aborted transmissions (underruns) count */
        unsigned tx_timeouts;        /* transmission timeouts */
        unsigned tx_rejects;        /* other transmit errors */

        /* media level statistics */
        unsigned rx_bad_format;        /* frames with invalid format */
        unsigned rx_bad_addr;        /* frames with invalid media address */
        unsigned tx_retries;        /* frames re-transmitted */
        unsigned reserved[16];        /* reserved for future use */
} wandev_stat_t;

/* 'state' defines */
enum wan_states
{
        WAN_UNCONFIGURED,        /* link/channel is not configured */
        WAN_DISCONNECTED,        /* link/channel is disconnected */
        WAN_CONNECTING,                /* connection is in progress */
        WAN_CONNECTED,                /* link/channel is operational */
        WAN_LIMIT,                /* for verification only */
        WAN_DUALPORT,                /* for Dual Port cards */
        WAN_DISCONNECTING,
        WAN_FT1_READY                /* FT1 Configurator Ready */
};

enum {
        WAN_LOCAL_IP,
        WAN_POINTOPOINT_IP,
        WAN_NETMASK_IP,
        WAN_BROADCAST_IP
};

/* 'modem_status' masks */
#define        WAN_MODEM_CTS        0x0001        /* CTS line active */
#define        WAN_MODEM_DCD        0x0002        /* DCD line active */
#define        WAN_MODEM_DTR        0x0010        /* DTR line active */
#define        WAN_MODEM_RTS        0x0020        /* RTS line active */

/*----------------------------------------------------------------------------
 * WAN interface (logical channel) configuration (for ROUTER_IFNEW IOCTL).
 */
typedef struct wanif_conf
{
        unsigned magic;                        /* magic number */
        unsigned config_id;                /* configuration identifier */
        char name[WAN_IFNAME_SZ+1];        /* interface name, ASCIIZ */
        char addr[WAN_ADDRESS_SZ+1];        /* media address, ASCIIZ */
        char usedby[USED_BY_FIELD];        /* used by API or WANPIPE */
        unsigned idle_timeout;                /* sec, before disconnecting */
        unsigned hold_timeout;                /* sec, before re-connecting */
        unsigned cir;                        /* Committed Information Rate fwd,bwd*/
        unsigned bc;                        /* Committed Burst Size fwd, bwd */
        unsigned be;                        /* Excess Burst Size fwd, bwd */ 
        unsigned char enable_IPX;        /* Enable or Disable IPX */
        unsigned char inarp;                /* Send Inverse ARP requests Y/N */
        unsigned inarp_interval;        /* sec, between InARP requests */
        unsigned long network_number;        /* Network Number for IPX */
        char mc;                        /* Multicast on or off */
        char local_addr[WAN_ADDRESS_SZ+1];/* local media address, ASCIIZ */
        unsigned char port;                /* board port */
        unsigned char protocol;                /* prococol used in this channel (TCPOX25 or X25) */
        char pap;                        /* PAP enabled or disabled */
        char chap;                        /* CHAP enabled or disabled */
        unsigned char userid[511];        /* List of User Id */
        unsigned char passwd[511];        /* List of passwords */
        unsigned char sysname[31];        /* Name of the system */
        unsigned char ignore_dcd;        /* Protocol options: */
        unsigned char ignore_cts;        /*  Ignore these to determine */
        unsigned char ignore_keepalive;        /*  link status (Yes or No) */
        unsigned char hdlc_streaming;        /*  Hdlc streaming mode (Y/N) */
        unsigned keepalive_tx_tmr;        /* transmit keepalive timer */
        unsigned keepalive_rx_tmr;        /* receive  keepalive timer */
        unsigned keepalive_err_margin;        /* keepalive_error_tolerance */
        unsigned slarp_timer;                /* SLARP request timer */
        unsigned char ttl;                /* Time To Live for UDP security */
        char interface;                        /* RS-232/V.35, etc. */
        char clocking;                        /* external/internal */
        unsigned bps;                        /* data transfer rate */
        unsigned mtu;                        /* maximum transmit unit size */
        unsigned char if_down;                /* brind down interface when disconnected */
        unsigned char gateway;                /* Is this interface a gateway */
        unsigned char true_if_encoding;        /* Set the dev->type to true board protocol */

        unsigned char asy_data_trans;     /* async API options */
        unsigned char rts_hs_for_receive; /* async Protocol options */
        unsigned char xon_xoff_hs_for_receive;
        unsigned char xon_xoff_hs_for_transmit;
        unsigned char dcd_hs_for_transmit;
        unsigned char cts_hs_for_transmit;
        unsigned char async_mode;
        unsigned tx_bits_per_char;
        unsigned rx_bits_per_char;
        unsigned stop_bits;  
        unsigned char parity;
         unsigned break_timer;
        unsigned inter_char_timer;
        unsigned rx_complete_length;
        unsigned xon_char;
        unsigned xoff_char;
        unsigned char receive_only;        /*  no transmit buffering (Y/N) */
} wanif_conf_t;

#endif        /* _ROUTER_H */