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/*

 * pppd.h - PPP daemon global declarations.

 *

 * Copyright (c) 1989 Carnegie Mellon University.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms are permitted

 * provided that the above copyright notice and this paragraph are

 * duplicated in all such forms and that any documentation,

 * advertising materials, and other materials related to such

 * distribution and use acknowledge that the software was developed

 * by Carnegie Mellon University.  The name of the

 * University may not be used to endorse or promote products derived

 * from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 *

 * $Id: pppd.h,v 1.2 2001-09-27 12:01:57 chris Exp $

 */

/*

 * TODO:

 */

#ifndef __PPPD_H__

#define __PPPD_H__

#include <stdio.h>              /* for FILE */

#include <sys/param.h>          /* for MAXPATHLEN and BSD4_4, if defined */

#include <sys/types.h>          /* for u_int32_t, if defined */

#include <sys/time.h>           /* for struct timeval */

#include <net/ppp_defs.h>

#if __STDC__

#include <stdarg.h>

#define __V(x)  x

#else

#include <varargs.h>

#define __V(x)  (va_alist) va_dcl

#define const

#endif

/*

 * Limits.

 */

#define NUM_PPP         1       /* One PPP interface supported (per process) */

#define MAXWORDLEN      1024    /* max length of word in file (incl null) */

#define MAXARGS         1       /* max # args to a command */

#define MAXNAMELEN      256     /* max length of hostname or name for auth */

#define MAXSECRETLEN    256     /* max length of password or secret */

/*

 * Global variables.

 */

extern int      hungup;         /* Physical layer has disconnected */

extern int      interfunit;             /* Interface unit number */

extern char     ifname[];       /* Interface name */

extern int      ttyfd;          /* Serial device file descriptor */

extern char     hostname[];     /* Our hostname */

extern u_char   outpacket_buf[]; /* Buffer for outgoing packets */

extern int      phase;          /* Current state of link - see values below */

extern int      baud_rate;      /* Current link speed in bits/sec */

extern char     *progname;      /* Name of this program */

extern int      redirect_stderr;/* Connector's stderr should go to file */

extern char     peer_authname[];/* Authenticated name of peer */

extern int      privileged;     /* We were run by real-uid root */

extern int      need_holdoff;   /* Need holdoff period after link terminates */

extern char     **script_env;   /* Environment variables for scripts */

extern int      detached;       /* Have detached from controlling tty */

/*

 * Variables set by command-line options.

 */

extern int      debug;          /* Debug flag */

extern int      kdebugflag;     /* Tell kernel to print debug messages */

extern int      default_device; /* Using /dev/tty or equivalent */

extern char     devnam[];       /* Device name */

extern int      crtscts;        /* Use hardware flow control */

extern int      modem;          /* Use modem control lines */

extern int      inspeed;        /* Input/Output speed requested */

extern u_int32_t netmask;       /* IP netmask to set on interface */

extern int      lockflag;       /* Create lock file to lock the serial dev */

extern int      nodetach;       /* Don't detach from controlling tty */

extern char     *connector[];   /* Script to establish physical link */

extern char     **disconnector; /* Script to disestablish physical link */

extern char     **welcomer;     /* Script to welcome client after connection */

extern int      maxconnect;     /* Maximum connect time (seconds) */

extern char     user[];         /* Our name for authenticating ourselves */

extern char     passwd[];       /* Password for PAP */

extern int      auth_required;  /* Peer is required to authenticate */

extern int      proxyarp;       /* Set up proxy ARP entry for peer */

extern int      persist;        /* Reopen link after it goes down */

extern int      uselogin;       /* Use /etc/passwd for checking PAP */

extern int      lcp_echo_interval; /* Interval between LCP echo-requests */

extern int      lcp_echo_fails; /* Tolerance to unanswered echo-requests */

extern char     our_name[];     /* Our name for authentication purposes */

extern char     remote_name[];  /* Peer's name for authentication */

extern int      explicit_remote;/* remote_name specified with remotename opt */

extern int      usehostname;    /* Use hostname for our_name */

extern int      disable_defaultip; /* Don't use hostname for default IP adrs */

extern int      demand;         /* Do dial-on-demand */

extern char     *ipparam;       /* Extra parameter for ip up/down scripts */

extern int      cryptpap;       /* Others' PAP passwords are encrypted */

extern int      idle_time_limit;/* Shut down link if idle for this long */

extern int      holdoff;        /* Dead time before restarting */

extern int      refuse_pap;     /* Don't wanna auth. ourselves with PAP */

extern int      refuse_chap;    /* Don't wanna auth. ourselves with CHAP */

#ifdef PPP_FILTER

extern struct   bpf_program pass_filter;   /* Filter for pkts to pass */

extern struct   bpf_program active_filter; /* Filter for link-active pkts */

#endif

#ifdef MSLANMAN

extern int      ms_lanman;      /* Nonzero if use LanMan password instead of NT */

                                /* Has meaning only with MS-CHAP challenges */

#endif

/*

 * Values for phase.

 */

#define PHASE_DEAD              0

#define PHASE_INITIALIZE        1

#define PHASE_DORMANT           2

#define PHASE_ESTABLISH         3

#define PHASE_AUTHENTICATE      4

#define PHASE_CALLBACK          5

#define PHASE_NETWORK           6

#define PHASE_TERMINATE         7

#define PHASE_HOLDOFF           8

/*

 * The following struct gives the addresses of procedures to call

 * for a particular protocol.

 */

struct protent {

    u_short protocol;           /* PPP protocol number */

    /* Initialization procedure */

    void (*init) __P((int unit));

    /* Process a received packet */

    void (*input) __P((int unit, u_char *pkt, int len));

    /* Process a received protocol-reject */

    void (*protrej) __P((int unit));

    /* Lower layer has come up */

    void (*lowerup) __P((int unit));

    /* Lower layer has gone down */

    void (*lowerdown) __P((int unit));

    /* Open the protocol */

    void (*open) __P((int unit));

    /* Close the protocol */

    void (*close) __P((int unit, char *reason));

    /* Print a packet in readable form */

    int  (*printpkt) __P((u_char *pkt, int len,

                          void (*printer) __P((void *, char *, ...)),

                          void *arg));

    /* Process a received data packet */

    void (*datainput) __P((int unit, u_char *pkt, int len));

    int  enabled_flag;          /* 0 iff protocol is disabled */

    char *name;                 /* Text name of protocol */

    /* Check requested options, assign defaults */

    void (*check_options) __P((void));

    /* Configure interface for demand-dial */

    int  (*demand_conf) __P((int unit));

    /* Say whether to bring up link for this pkt */

    int  (*active_pkt) __P((u_char *pkt, int len));

};

/* Table of pointers to supported protocols */

extern struct protent *protocols[];

/*

 * Prototypes.

 */

/* Procedures exported from main.c. */

void detach __P((void));        /* Detach from controlling tty */

void die __P((int));            /* Cleanup and exit */

void quit __P((void));          /* like die(1) */

void novm __P((char *));        /* Say we ran out of memory, and die */

void my_timeout __P((void (*func)(void *), void *arg, int t));

                                /* Call func(arg) after t seconds */

void untimeout __P((void (*func)(void *), void *arg));

                                /* Cancel call to func(arg) */

int run_program __P((char *prog, char **args, int must_exist));

                                /* Run program prog with args in child */

void demuxprotrej __P((int, int));

                                /* Demultiplex a Protocol-Reject */

void format_packet __P((u_char *, int, void (*) (void *, char *, ...),

                void *));       /* Format a packet in human-readable form */

void log_packet __P((u_char *, int, char *, int));

                                /* Format a packet and log it with syslog */

void print_string __P((char *, int,  void (*) (void *, char *, ...),

                void *));       /* Format a string for output */

int fmtmsg __P((char *, int, char *, ...));             /* sprintf++ */

int vfmtmsg __P((char *, int, char *, va_list));        /* vsprintf++ */

void script_setenv __P((char *, char *));       /* set script env var */

void script_unsetenv __P((char *));             /* unset script env var */

/* My procedures */

int connect_stb();

int disconnect_stb();

int pppdmain(int, char*[]);

int chatmain(char*);

/* Procedures exported from auth.c */

void link_required __P((int));    /* we are starting to use the link */

void link_terminated __P((int));  /* we are finished with the link */

void link_down __P((int));        /* the LCP layer has left the Opened state */

void link_established __P((int)); /* the link is up; authenticate now */

void np_up __P((int, int));       /* a network protocol has come up */

void np_down __P((int, int));     /* a network protocol has gone down */

void np_finished __P((int, int)); /* a network protocol no longer needs link */

void auth_peer_fail __P((int, int));

                                /* peer failed to authenticate itself */

void auth_peer_success __P((int, int, char *, int));

                                /* peer successfully authenticated itself */

void auth_withpeer_fail __P((int, int));

                                /* we failed to authenticate ourselves */

void auth_withpeer_success __P((int, int));

                                /* we successfully authenticated ourselves */

void auth_check_options __P((void));

                                /* check authentication options supplied */

void auth_reset __P((int));     /* check what secrets we have */

int  check_passwd __P((int, char *, int, char *, int, char **, int *));

                                /* Check peer-supplied username/password */

int  get_secret __P((int, char *, char *, char *, int *, int));

                                /* get "secret" for chap */

int  auth_ip_addr __P((int, u_int32_t));

                                /* check if IP address is authorized */

int  bad_ip_adrs __P((u_int32_t));

                                /* check if IP address is unreasonable */

void check_access __P((FILE *, char *));

                                /* check permissions on secrets file */

/* Procedures exported from demand.c */

void demand_conf __P((void));   /* config interface(s) for demand-dial */

void demand_block __P((void));  /* set all NPs to queue up packets */

void demand_unblock __P((void)); /* set all NPs to pass packets */

void demand_discard __P((void)); /* set all NPs to discard packets */

void demand_rexmit __P((int));  /* retransmit saved frames for an NP */

int  loop_chars __P((unsigned char *, int)); /* process chars from loopback */

int  loop_frame __P((unsigned char *, int)); /* process frame from loopback */

/* Procedures exported from sys-*.c */

void sys_init __P((void));      /* Do system-dependent initialization */

void sys_cleanup __P((void));   /* Restore system state before exiting */

void sys_check_options __P((void)); /* Check options specified */

void sys_close __P((void));     /* Clean up in a child before execing */

int  ppp_available __P((void)); /* Test whether ppp kernel support exists */

void open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */

void establish_ppp __P((int));  /* Turn serial port into a ppp interface */

void restore_loop __P((void));  /* Transfer ppp unit back to loopback */

void disestablish_ppp __P((int)); /* Restore port to normal operation */

void clean_check __P((void));   /* Check if line was 8-bit clean */

void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */

void restore_tty __P((int));    /* Restore port's original parameters */

void setdtr __P((int, int));    /* Raise or lower port's DTR line */

void output __P((int, u_char *, int)); /* Output a PPP packet */

void wait_input __P((struct timeval *));

                                /* Wait for input, with timeout */

void wait_loop_output __P((struct timeval *));

                                /* Wait for pkt from loopback, with timeout */

void wait_time __P((struct timeval *)); /* Wait for given length of time */

int  read_packet __P((u_char *)); /* Read PPP packet */

int  get_loop_output __P((void)); /* Read pkts from loopback */

void ppp_send_config __P((int, int, u_int32_t, int, int));

                                /* Configure i/f transmit parameters */

void ppp_set_xaccm __P((int, ext_accm));

                                /* Set extended transmit ACCM */

void ppp_recv_config __P((int, int, u_int32_t, int, int));

                                /* Configure i/f receive parameters */

int  ccp_test __P((int, u_char *, int, int));

                                /* Test support for compression scheme */

void ccp_flags_set __P((int, int, int));

                                /* Set kernel CCP state */

int  ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */

int  get_idle_time __P((int, struct ppp_idle *));

                                /* Find out how long link has been idle */

int  sifvjcomp __P((int, int, int, int));

                                /* Configure VJ TCP header compression */

int  sifup __P((int));          /* Configure i/f up (for IP) */

int  sifnpmode __P((int u, int proto, enum NPmode mode));

                                /* Set mode for handling packets for proto */

int  sifdown __P((int));        /* Configure i/f down (for IP) */

int  sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));

                                /* Configure IP addresses for i/f */

int  cifaddr __P((int, u_int32_t, u_int32_t));

                                /* Reset i/f IP addresses */

int  sifdefaultroute __P((int, u_int32_t, u_int32_t));

                                /* Create default route through i/f */

int  cifdefaultroute __P((int, u_int32_t, u_int32_t));

                                /* Delete default route through i/f */

int  sifproxyarp __P((int, u_int32_t));

                                /* Add proxy ARP entry for peer */

int  cifproxyarp __P((int, u_int32_t));

                                /* Delete proxy ARP entry for peer */

u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */

int  lock __P((char *));        /* Create lock file for device */

void unlock __P((void));        /* Delete previously-created lock file */

int  daemon __P((int, int));    /* Detach us from terminal session */

void logwtmp __P((const char *, const char *, const char *));

                                /* Write entry to wtmp file */

int  get_host_seed __P((void)); /* Get host-dependent random number seed */

#ifdef PPP_FILTER

int  set_filters __P((struct bpf_program *pass, struct bpf_program *active));

                                /* Set filter programs in kernel */

#endif

/* Procedures exported from options.c */

int  parse_args __P((int argc, char **argv));

                                /* Parse options from arguments given */

void usage __P((void));         /* Print a usage message */

int  options_from_file __P((char *filename, int must_exist, int check_prot,

                            int privileged));

                                /* Parse options from an options file */

int  options_from_user __P((void)); /* Parse options from user's .ppprc */

int  options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */

void scan_args __P((int argc, char **argv));

                                /* Look for tty name in command-line args */

int  getword __P((FILE *f, char *word, int *newlinep, char *filename));

                                /* Read a word from a file */

void option_error __P((char *fmt, ...));

                                /* Print an error message about an option */

/*

 * This structure is used to store information about certain

 * options, such as where the option value came from (/etc/ppp/options,

 * command line, etc.) and whether it came from a privileged source.

 */

struct option_info {

    int     priv;               /* was value set by sysadmin? */

    char    *source;            /* where option came from */

};

extern struct option_info auth_req_info;

extern struct option_info connector_info;

extern struct option_info disconnector_info;

extern struct option_info welcomer_info;

extern struct option_info devnam_info;

/*

 * Inline versions of get/put char/short/long.

 * Pointer is advanced; we assume that both arguments

 * are lvalues and will already be in registers.

 * cp MUST be u_char *.

 */

#define GETCHAR(c, cp) { \

        (c) = *(cp)++; \

}

#define PUTCHAR(c, cp) { \

        *(cp)++ = (u_char) (c); \

}

#define GETSHORT(s, cp) { \

        (s) = *(cp)++ << 8; \

        (s) |= *(cp)++; \

}

#define PUTSHORT(s, cp) { \

        *(cp)++ = (u_char) ((s) >> 8); \

        *(cp)++ = (u_char) (s); \

}

#define GETLONG(l, cp) { \

        (l) = *(cp)++ << 8; \

        (l) |= *(cp)++; (l) <<= 8; \

        (l) |= *(cp)++; (l) <<= 8; \

        (l) |= *(cp)++; \

}

#define PUTLONG(l, cp) { \

        *(cp)++ = (u_char) ((l) >> 24); \

        *(cp)++ = (u_char) ((l) >> 16); \

        *(cp)++ = (u_char) ((l) >> 8); \

        *(cp)++ = (u_char) (l); \

}

#define INCPTR(n, cp)   ((cp) += (n))

#define DECPTR(n, cp)   ((cp) -= (n))

#undef  FALSE

#define FALSE   0

#undef  TRUE

#define TRUE    1

/*

 * System dependent definitions for user-level 4.3BSD UNIX implementation.

 */

#define DEMUXPROTREJ(u, p)      demuxprotrej(u, p)

#define TIMEOUT(r, f, t)        my_timeout((r), (f), (t))

#define UNTIMEOUT(r, f)         untimeout((r), (f))

#define BCOPY(s, d, l)          memcpy(d, s, l)

#define BZERO(s, n)             memset(s, 0, n)

#define EXIT(u)                 quit()

#define PRINTMSG(m, l)  { m[l] = '\0'; syslog(LOG_INFO, "Remote message: %s", m); }

/*

 * MAKEHEADER - Add Header fields to a packet.

 */

#define MAKEHEADER(p, t) { \

    PUTCHAR(PPP_ALLSTATIONS, p); \

    PUTCHAR(PPP_UI, p); \

    PUTSHORT(t, p); }

/* #define DEBUGALL */

#ifdef DEBUGALL

#define DEBUGMAIN       1

#define DEBUGFSM        1

#define DEBUGLCP        1

#define DEBUGIPCP       1

#define DEBUGUPAP       1

#define DEBUGCHAP       1

#endif

#ifndef LOG_PPP                 /* we use LOG_LOCAL2 for syslog by default */

#if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \

  || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \

  || defined(DEBUGCHAP) || defined(DEBUG)

#define LOG_PPP LOG_LOCAL2

#else

#define LOG_PPP LOG_DAEMON

#endif

#endif /* LOG_PPP */

extern rtems_id pppdaemon_tid;

#ifdef DEBUGMAIN

#define MAINDEBUG(x)    if (debug) syslog x

#else

#define MAINDEBUG(x)

#endif

#ifdef DEBUGSYS

#define SYSDEBUG(x)     if (debug) syslog x

#else

#define SYSDEBUG(x)

#endif

#ifdef DEBUGFSM

#define FSMDEBUG(x)     if (debug) syslog x

#else

#define FSMDEBUG(x)

#endif

#ifdef DEBUGLCP

#define LCPDEBUG(x)     if (debug) syslog x

#else

#define LCPDEBUG(x)

#endif

#ifdef DEBUGIPCP

#define IPCPDEBUG(x)    if (debug) syslog x

#else

#define IPCPDEBUG(x)

#endif

#ifdef DEBUGUPAP

#define UPAPDEBUG(x)    if (debug) syslog x

#else

#define UPAPDEBUG(x)

#endif

#ifdef DEBUGCHAP

#define CHAPDEBUG(x)    if (debug) syslog x

#else

#define CHAPDEBUG(x)

#endif

#ifdef DEBUGIPXCP

#define IPXCPDEBUG(x)   if (debug) syslog x

#else

#define IPXCPDEBUG(x)

#endif

#ifndef SIGTYPE

#if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)

#define SIGTYPE void

#else

#define SIGTYPE int

#endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */

#endif /* SIGTYPE */

#ifndef MIN

#define MIN(a, b)       ((a) < (b)? (a): (b))

#endif

#ifndef MAX

#define MAX(a, b)       ((a) > (b)? (a): (b))

#endif

#endif /* __PPP_H__ */