/*
 * Copyright (c) 1998-2009 Sendmail, Inc. and its suppliers.
 *      All rights reserved.
 * Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.
 * Copyright (c) 1988, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 */

/*
**  SENDMAIL.H -- MTA-specific definitions for sendmail.
*/

#ifndef _SENDMAIL_H
# define _SENDMAIL_H 1

#ifndef MILTER
# define MILTER 1       /* turn on MILTER by default */
#endif /* MILTER */

#ifdef _DEFINE
# define EXTERN
#else /* _DEFINE */
# define EXTERN extern
#endif /* _DEFINE */


#include <unistd.h>

#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <setjmp.h>
#include <string.h>
#include <time.h>
# ifdef EX_OK
#  undef EX_OK                  /* for SVr4.2 SMP */
# endif /* EX_OK */

#include "sendmail/sendmail.h"

/* profiling? */
#if MONCONTROL
# define SM_PROF(x)     moncontrol(x)
#else /* MONCONTROL */
# define SM_PROF(x)
#endif /* MONCONTROL */

#ifdef _DEFINE
# ifndef lint
SM_UNUSED(static char SmailId[]) = "@(#)$Id: sendmail.h,v 8.1068 2009/12/18 17:08:01 ca Exp $";
# endif /* ! lint */
#endif /* _DEFINE */

#include "bf.h"
#include "timers.h"
#include <sm/exc.h>
#include <sm/heap.h>
#include <sm/debug.h>
#include <sm/rpool.h>
#include <sm/io.h>
#include <sm/path.h>
#include <sm/signal.h>
#include <sm/clock.h>
#include <sm/mbdb.h>
#include <sm/errstring.h>
#include <sm/sysexits.h>
#include <sm/shm.h>
#include <sm/misc.h>

#ifdef LOG
# include <syslog.h>
#endif /* LOG */



# if NETINET || NETINET6 || NETUNIX || NETISO || NETNS || NETX25
#  include <sys/socket.h>
# endif /* NETINET || NETINET6 || NETUNIX || NETISO || NETNS || NETX25 */
# if NETUNIX
#  include <sys/un.h>
# endif /* NETUNIX */
# if NETINET || NETINET6
#  include <netinet/in.h>
# endif /* NETINET || NETINET6 */
# if NETINET6
/*
**  There is no standard yet for IPv6 includes.
**  Specify OS specific implementation in conf.h
*/
# endif /* NETINET6 */
# if NETISO
#  include <netiso/iso.h>
# endif /* NETISO */
# if NETNS
#  include <netns/ns.h>
# endif /* NETNS */
# if NETX25
#  include <netccitt/x25.h>
# endif /* NETX25 */

# if NAMED_BIND
#  include <arpa/nameser.h>
#  ifdef NOERROR
#   undef NOERROR               /* avoid <sys/streams.h> conflict */
#  endif /* NOERROR */
#  include <resolv.h>
# else /* NAMED_BIND */
#   undef SM_SET_H_ERRNO
#   define SM_SET_H_ERRNO(err)
# endif /* NAMED_BIND */

# if HESIOD
#  include <hesiod.h>
#  if !defined(HES_ER_OK) || defined(HESIOD_INTERFACES)
#   define HESIOD_INIT          /* support for the new interface */
#  endif /* !defined(HES_ER_OK) || defined(HESIOD_INTERFACES) */
# endif /* HESIOD */

#if STARTTLS
#  include <openssl/ssl.h>
# if !TLS_NO_RSA
#  define RSA_KEYLENGTH 512
# endif /* !TLS_NO_RSA */
#endif /* STARTTLS */

#if SASL  /* include the sasl include files if we have them */


# if SASL == 2 || SASL >= 20000
#  include <sasl/sasl.h>
#  include <sasl/saslutil.h>
# else /* SASL == 2 || SASL >= 20000 */
#  include <sasl.h>
#  include <saslutil.h>
# endif /* SASL == 2 || SASL >= 20000 */
# if defined(SASL_VERSION_MAJOR) && defined(SASL_VERSION_MINOR) && defined(SASL_VERSION_STEP)
#  define SASL_VERSION (SASL_VERSION_MAJOR * 10000)  + (SASL_VERSION_MINOR * 100) + SASL_VERSION_STEP
#  if SASL == 1 || SASL == 2
#   undef SASL
#   define SASL SASL_VERSION
#  else /* SASL == 1 || SASL == 2 */
#   if SASL != SASL_VERSION
  ERROR README: -DSASL (SASL) does not agree with the version of the CYRUS_SASL library (SASL_VERSION)
  ERROR README: see README!
#   endif /* SASL != SASL_VERSION */
#  endif /* SASL == 1 || SASL == 2 */
# else /* defined(SASL_VERSION_MAJOR) && defined(SASL_VERSION_MINOR) && defined(SASL_VERSION_STEP) */
#  if SASL == 1
  ERROR README: please set -DSASL to the version of the CYRUS_SASL library
  ERROR README: see README!
#  endif /* SASL == 1 */
# endif /* defined(SASL_VERSION_MAJOR) && defined(SASL_VERSION_MINOR) && defined(SASL_VERSION_STEP) */
#endif /* SASL */

/*
**  Following are "sort of" configuration constants, but they should
**  be pretty solid on most architectures today.  They have to be
**  defined after <arpa/nameser.h> because some versions of that
**  file also define them.  In all cases, we can't use sizeof because
**  some systems (e.g., Crays) always treat everything as being at
**  least 64 bits.
*/

#ifndef INADDRSZ
# define INADDRSZ       4               /* size of an IPv4 address in bytes */
#endif /* ! INADDRSZ */
#ifndef IN6ADDRSZ
# define IN6ADDRSZ      16              /* size of an IPv6 address in bytes */
#endif /* ! IN6ADDRSZ */
#ifndef INT16SZ
# define INT16SZ        2               /* size of a 16 bit integer in bytes */
#endif /* ! INT16SZ */
#ifndef INT32SZ
# define INT32SZ        4               /* size of a 32 bit integer in bytes */
#endif /* ! INT32SZ */
#ifndef INADDR_LOOPBACK
# define INADDR_LOOPBACK        0x7f000001      /* loopback address */
#endif /* ! INADDR_LOOPBACK */

/*
**  Error return from inet_addr(3), in case not defined in /usr/include.
*/

#ifndef INADDR_NONE
# define INADDR_NONE    0xffffffff
#endif /* ! INADDR_NONE */


/* (f)open() modes for queue files */
# define QF_O_EXTRA     0


/*
**  An 'argument class' describes the storage allocation status
**  of an object pointed to by an argument to a function.
*/

typedef enum
{
        A_HEAP, /* the storage was allocated by malloc, and the
                 * ownership of the storage is ceded by the caller
                 * to the called function. */
        A_TEMP, /* The storage is temporary, and is only guaranteed
                 * to be valid for the duration of the function call. */
        A_PERM  /* The storage is 'permanent': this might mean static
                 * storage, or rpool storage. */
} ARGCLASS_T;

/* forward references for prototypes */
typedef struct envelope ENVELOPE;
typedef struct mailer   MAILER;
typedef struct queuegrp QUEUEGRP;

/*
**  Address structure.
**      Addresses are stored internally in this structure.
*/

struct address
{
        char            *q_paddr;       /* the printname for the address */
        char            *q_user;        /* user name */
        char            *q_ruser;       /* real user name, or NULL if q_user */
        char            *q_host;        /* host name */
        struct mailer   *q_mailer;      /* mailer to use */
        unsigned long   q_flags;        /* status flags, see below */
        uid_t           q_uid;          /* user-id of receiver (if known) */
        gid_t           q_gid;          /* group-id of receiver (if known) */
        char            *q_home;        /* home dir (local mailer only) */
        char            *q_fullname;    /* full name if known */
        struct address  *q_next;        /* chain */
        struct address  *q_alias;       /* address this results from */
        char            *q_owner;       /* owner of q_alias */
        struct address  *q_tchain;      /* temporary use chain */
#if PIPELINING
        struct address  *q_pchain;      /* chain for pipelining */
#endif /* PIPELINING */
        char            *q_finalrcpt;   /* Final-Recipient: DSN header */
        char            *q_orcpt;       /* ORCPT parameter from RCPT TO: line */
        char            *q_status;      /* status code for DSNs */
        char            *q_rstatus;     /* remote status message for DSNs */
        time_t          q_statdate;     /* date of status messages */
        char            *q_statmta;     /* MTA generating q_rstatus */
        short           q_state;        /* address state, see below */
        char            *q_signature;   /* MX-based sorting value */
        int             q_qgrp;         /* index into queue groups */
        int             q_qdir;         /* queue directory inside group */
        char            *q_message;     /* error message */
};

typedef struct address ADDRESS;

/* bit values for q_flags */
#define QGOODUID        0x00000001      /* the q_uid q_gid fields are good */
#define QPRIMARY        0x00000002      /* set from RCPT or argv */
#define QNOTREMOTE      0x00000004      /* address not for remote forwarding */
#define QSELFREF        0x00000008      /* this address references itself */
#define QBOGUSSHELL     0x00000010      /* user has no valid shell listed */
#define QUNSAFEADDR     0x00000020      /* address acquired via unsafe path */
#define QPINGONSUCCESS  0x00000040      /* give return on successful delivery */
#define QPINGONFAILURE  0x00000080      /* give return on failure */
#define QPINGONDELAY    0x00000100      /* give return on message delay */
#define QHASNOTIFY      0x00000200      /* propagate notify parameter */
#define QRELAYED        0x00000400      /* DSN: relayed to non-DSN aware sys */
#define QEXPANDED       0x00000800      /* DSN: undergone list expansion */
#define QDELIVERED      0x00001000      /* DSN: successful final delivery */
#define QDELAYED        0x00002000      /* DSN: message delayed */
#define QALIAS          0x00004000      /* expanded alias */
#define QBYTRACE        0x00008000      /* DeliverBy: trace */
#define QBYNDELAY       0x00010000      /* DeliverBy: notify, delay */
#define QBYNRELAY       0x00020000      /* DeliverBy: notify, relayed */
#define QTHISPASS       0x40000000      /* temp: address set this pass */
#define QRCPTOK         0x80000000      /* recipient() processed address */

#define Q_PINGFLAGS     (QPINGONSUCCESS|QPINGONFAILURE|QPINGONDELAY)

/* values for q_state */
#define QS_OK           0               /* address ok (for now)/not yet tried */
#define QS_SENT         1               /* good address, delivery complete */
#define QS_BADADDR      2               /* illegal address */
#define QS_QUEUEUP      3               /* save address in queue */
#define QS_RETRY        4               /* retry delivery for next MX */
#define QS_VERIFIED     5               /* verified, but not expanded */

/*
**  Notice: all of the following values are variations of QS_DONTSEND.
**      If new states are added, they must be inserted in the proper place!
**      See the macro definition of QS_IS_DEAD() down below.
*/

#define QS_DONTSEND     6               /* don't send to this address */
#define QS_EXPANDED     7               /* expanded */
#define QS_SENDER       8               /* message sender (MeToo) */
#define QS_CLONED       9               /* addr cloned to split envelope */
#define QS_DISCARDED    10              /* rcpt discarded (EF_DISCARD) */
#define QS_REPLACED     11              /* maplocaluser()/UserDB replaced */
#define QS_REMOVED      12              /* removed (removefromlist()) */
#define QS_DUPLICATE    13              /* duplicate suppressed */
#define QS_INCLUDED     14              /* :include: delivery */
#define QS_FATALERR     15              /* fatal error, don't deliver */

/* address state testing primitives */
#define QS_IS_OK(s)             ((s) == QS_OK)
#define QS_IS_SENT(s)           ((s) == QS_SENT)
#define QS_IS_BADADDR(s)        ((s) == QS_BADADDR)
#define QS_IS_QUEUEUP(s)        ((s) == QS_QUEUEUP)
#define QS_IS_RETRY(s)          ((s) == QS_RETRY)
#define QS_IS_VERIFIED(s)       ((s) == QS_VERIFIED)
#define QS_IS_EXPANDED(s)       ((s) == QS_EXPANDED)
#define QS_IS_REMOVED(s)        ((s) == QS_REMOVED)
#define QS_IS_UNDELIVERED(s)    ((s) == QS_OK || \
                                 (s) == QS_QUEUEUP || \
                                 (s) == QS_RETRY || \
                                 (s) == QS_VERIFIED)
#define QS_IS_UNMARKED(s)       ((s) == QS_OK || \
                                 (s) == QS_RETRY)
#define QS_IS_SENDABLE(s)       ((s) == QS_OK || \
                                 (s) == QS_QUEUEUP || \
                                 (s) == QS_RETRY)
#define QS_IS_ATTEMPTED(s)      ((s) == QS_QUEUEUP || \
                                 (s) == QS_RETRY || \
                                 (s) == QS_SENT || \
                                 (s) == QS_DISCARDED)
#define QS_IS_DEAD(s)           ((s) >= QS_DONTSEND)


#define NULLADDR        ((ADDRESS *) NULL)

extern ADDRESS  NullAddress;    /* a null (template) address [main.c] */

/* functions */
extern void     cataddr __P((char **, char **, char *, int, int, bool));
extern char     *crackaddr __P((char *, ENVELOPE *));
extern bool     emptyaddr __P((ADDRESS *));
extern ADDRESS  *getctladdr __P((ADDRESS *));
extern int      include __P((char *, bool, ADDRESS *, ADDRESS **, int, ENVELOPE *));
extern bool     invalidaddr __P((char *, char *, bool));
extern ADDRESS  *parseaddr __P((char *, ADDRESS *, int, int, char **,
                                ENVELOPE *, bool));
extern char     **prescan __P((char *, int, char[], int, char **, unsigned char *, bool));
extern void     printaddr __P((SM_FILE_T *, ADDRESS *, bool));
extern ADDRESS  *recipient __P((ADDRESS *, ADDRESS **, int, ENVELOPE *));
extern char     *remotename __P((char *, MAILER *, int, int *, ENVELOPE *));
extern int      rewrite __P((char **, int, int, ENVELOPE *, int));
extern bool     sameaddr __P((ADDRESS *, ADDRESS *));
extern int      sendtolist __P((char *, ADDRESS *, ADDRESS **, int, ENVELOPE *));
#if MILTER
extern int      removefromlist __P((char *, ADDRESS **, ENVELOPE *));
#endif /* MILTER */
extern void     setsender __P((char *, ENVELOPE *, char **, int, bool));
typedef void esmtp_args_F __P((ADDRESS *, char *, char *, ENVELOPE *));
extern void     parse_esmtp_args __P((ENVELOPE *, ADDRESS *, char *, char *,
                        char *, char *args[], esmtp_args_F));
extern esmtp_args_F mail_esmtp_args;
extern esmtp_args_F rcpt_esmtp_args;
extern void     reset_mail_esmtp_args __P((ENVELOPE *));

/* macro to simplify the common call to rewrite() */
#define REWRITE(pvp, rs, env)   rewrite(pvp, rs, 0, env, MAXATOM)

/*
**  Token Tables for prescan
*/

extern unsigned char    ExtTokenTab[256];       /* external strings */
extern unsigned char    IntTokenTab[256];       /* internal strings */


/*
**  Mailer definition structure.
**      Every mailer known to the system is declared in this
**      structure.  It defines the pathname of the mailer, some
**      flags associated with it, and the argument vector to
**      pass to it.  The flags are defined in conf.c
**
**      The argument vector is expanded before actual use.  All
**      words except the first are passed through the macro
**      processor.
*/

struct mailer
{
        char    *m_name;        /* symbolic name of this mailer */
        char    *m_mailer;      /* pathname of the mailer to use */
        char    *m_mtatype;     /* type of this MTA */
        char    *m_addrtype;    /* type for addresses */
        char    *m_diagtype;    /* type for diagnostics */
        BITMAP256 m_flags;      /* status flags, see below */
        short   m_mno;          /* mailer number internally */
        short   m_nice;         /* niceness to run at (mostly for prog) */
        char    **m_argv;       /* template argument vector */
        short   m_sh_rwset;     /* rewrite set: sender header addresses */
        short   m_se_rwset;     /* rewrite set: sender envelope addresses */
        short   m_rh_rwset;     /* rewrite set: recipient header addresses */
        short   m_re_rwset;     /* rewrite set: recipient envelope addresses */
        char    *m_eol;         /* end of line string */
        long    m_maxsize;      /* size limit on message to this mailer */
        int     m_linelimit;    /* max # characters per line */
        int     m_maxdeliveries; /* max deliveries per mailer connection */
        char    *m_execdir;     /* directory to chdir to before execv */
        char    *m_rootdir;     /* directory to chroot to before execv */
        uid_t   m_uid;          /* UID to run as */
        gid_t   m_gid;          /* GID to run as */
        char    *m_defcharset;  /* default character set */
        time_t  m_wait;         /* timeout to wait for end */
        int     m_maxrcpt;      /* max recipients per envelope client-side */
        short   m_qgrp;         /* queue group for this mailer */
};

/* bits for m_flags */
#define M_ESMTP         'a'     /* run Extended SMTP */
#define M_ALIASABLE     'A'     /* user can be LHS of an alias */
#define M_BLANKEND      'b'     /* ensure blank line at end of message */
#define M_STRIPBACKSL   'B'     /* strip all leading backslashes from user */
#define M_NOCOMMENT     'c'     /* don't include comment part of address */
#define M_CANONICAL     'C'     /* make addresses canonical "u@dom" */
#define M_NOBRACKET     'd'     /* never angle bracket envelope route-addrs */
                /*      'D'        CF: include Date: */
#define M_EXPENSIVE     'e'     /* it costs to use this mailer.... */
#define M_ESCFROM       'E'     /* escape From lines to >From */
#define M_FOPT          'f'     /* mailer takes picky -f flag */
                /*      'F'        CF: include From: or Resent-From: */
#define M_NO_NULL_FROM  'g'     /* sender of errors should be $g */
#define M_HST_UPPER     'h'     /* preserve host case distinction */
#define M_PREHEAD       'H'     /* MAIL11V3: preview headers */
#define M_UDBENVELOPE   'i'     /* do udbsender rewriting on envelope */
#define M_INTERNAL      'I'     /* SMTP to another sendmail site */
#define M_UDBRECIPIENT  'j'     /* do udbsender rewriting on recipient lines */
#define M_NOLOOPCHECK   'k'     /* don't check for loops in HELO command */
#define M_CHUNKING      'K'     /* CHUNKING: reserved for future use */
#define M_LOCALMAILER   'l'     /* delivery is to this host */
#define M_LIMITS        'L'     /* must enforce SMTP line limits */
#define M_MUSER         'm'     /* can handle multiple users at once */
                /*      'M'        CF: include Message-Id: */
#define M_NHDR          'n'     /* don't insert From line */
#define M_MANYSTATUS    'N'     /* MAIL11V3: DATA returns multi-status */
#define M_RUNASRCPT     'o'     /* always run mailer as recipient */
#define M_FROMPATH      'p'     /* use reverse-path in MAIL FROM: */
                /*      'P'        CF: include Return-Path: */
#define M_VRFY250       'q'     /* VRFY command returns 250 instead of 252 */
#define M_ROPT          'r'     /* mailer takes picky -r flag */
#define M_SECURE_PORT   'R'     /* try to send on a reserved TCP port */
#define M_STRIPQ        's'     /* strip quote chars from user/host */
#define M_SPECIFIC_UID  'S'     /* run as specific uid/gid */
#define M_USR_UPPER     'u'     /* preserve user case distinction */
#define M_UGLYUUCP      'U'     /* this wants an ugly UUCP from line */
#define M_CONTENT_LEN   'v'     /* add Content-Length: header (SVr4) */
                /*      'V'        UIUC: !-relativize all addresses */
#define M_HASPWENT      'w'     /* check for /etc/passwd entry */
#define M_NOHOSTSTAT    'W'     /* ignore long term host status information */
                /*      'x'        CF: include Full-Name: */
#define M_XDOT          'X'     /* use hidden-dot algorithm */
#define M_LMTP          'z'     /* run Local Mail Transport Protocol */
#define M_DIALDELAY     'Z'     /* apply dial delay sleeptime */
#define M_NOMX          '0'     /* turn off MX lookups */
#define M_NONULLS       '1'     /* don't send null bytes */
#define M_FSMTP         '2'     /* force SMTP (no ESMTP even if offered) */
#define M_EBCDIC        '3'     /* extend Q-P encoding for EBCDIC */
#define M_TRYRULESET5   '5'     /* use ruleset 5 after local aliasing */
#define M_7BITHDRS      '6'     /* strip headers to 7 bits even in 8 bit path */
#define M_7BITS         '7'     /* use 7-bit path */
#define M_8BITS         '8'     /* force "just send 8" behaviour */
#define M_MAKE8BIT      '9'     /* convert 7 -> 8 bit if appropriate */
#define M_CHECKINCLUDE  ':'     /* check for :include: files */
#define M_CHECKPROG     '|'     /* check for |program addresses */
#define M_CHECKFILE     '/'     /* check for /file addresses */
#define M_CHECKUDB      '@'     /* user can be user database key */
#define M_CHECKHDIR     '~'     /* SGI: check for valid home directory */
#define M_HOLD          '%'     /* Hold delivery until ETRN/-qI/-qR/-qS */
#define M_PLUS          '+'     /* Reserved: Used in mc for adding new flags */
#define M_MINUS         '-'     /* Reserved: Used in mc for removing flags */

/* functions */
extern void     initerrmailers __P((void));
extern void     makemailer __P((char *));
extern void     makequeue __P((char *, bool));
extern void     runqueueevent __P((int));
#if _FFR_QUEUE_RUN_PARANOIA
extern bool     checkqueuerunner __P((void));
#endif /* _FFR_QUEUE_RUN_PARANOIA */

EXTERN MAILER   *FileMailer;    /* ptr to *file* mailer */
EXTERN MAILER   *InclMailer;    /* ptr to *include* mailer */
EXTERN MAILER   *LocalMailer;   /* ptr to local mailer */
EXTERN MAILER   *ProgMailer;    /* ptr to program mailer */
EXTERN MAILER   *Mailer[MAXMAILERS + 1];

/*
**  Queue group definition structure.
**      Every queue group known to the system is declared in this structure.
**      It defines the basic pathname of the queue group, some flags
**      associated with it, and the argument vector to pass to it.
*/

struct qpaths_s
{
        char    *qp_name;       /* name of queue dir, relative path */
        short   qp_subdirs;     /* use subdirs? */
        short   qp_fsysidx;     /* file system index of this directory */
# if SM_CONF_SHM
        int     qp_idx;         /* index into array for queue information */
# endif /* SM_CONF_SHM */
};

typedef struct qpaths_s QPATHS;

struct queuegrp
{
        char    *qg_name;       /* symbolic name of this queue group */

        /*
        **  For now this is the same across all queue groups.
        **  Otherwise we have to play around with chdir().
        */

        char    *qg_qdir;       /* common component of queue directory */
        short   qg_index;       /* queue number internally, index in Queue[] */
        int     qg_maxqrun;     /* max # of jobs in 1 queuerun */
        int     qg_numqueues;   /* number of queues in this queue */

        /*
        **  qg_queueintvl == 0 denotes that no individual value is used.
        **  Whatever accesses this must deal with "<= 0" as
        **  "not set, use appropriate default".
        */

        time_t  qg_queueintvl;  /* interval for queue runs */
        QPATHS  *qg_qpaths;     /* list of queue directories */
        BITMAP256 qg_flags;     /* status flags, see below */
        short   qg_nice;        /* niceness for queue run */
        int     qg_wgrp;        /* Assigned to this work group */
        int     qg_maxlist;     /* max items in work queue for this group */
        int     qg_curnum;      /* current number of queue for queue runs */
        int     qg_maxrcpt;     /* max recipients per envelope, 0==no limit */

        time_t  qg_nextrun;     /* time for next queue runs */
#if _FFR_QUEUE_GROUP_SORTORDER
        short   qg_sortorder;   /* how do we sort this queuerun */
#endif /* _FFR_QUEUE_GROUP_SORTORDER */
#if 0
        long    qg_wkrcptfact;  /* multiplier for # recipients -> priority */
        long    qg_qfactor;     /* slope of queue function */
        bool    qg_doqueuerun;  /* XXX flag is it time to do a queuerun */
#endif /* 0 */
};

/* bits for qg_flags (XXX: unused as of now) */
#define QD_DEFINED      ((char) 1)      /* queue group has been defined */
#define QD_FORK         'f'     /* fork queue runs */

extern void     filesys_update __P((void));
#if _FFR_ANY_FREE_FS
extern bool     filesys_free __P((long));
#endif /* _FFR_ANY_FREE_FS */

#if SASL
/*
**  SASL
*/

/* lines in authinfo file or index into SASL_AI_T */
# define SASL_WRONG     (-1)
# define SASL_USER      0       /* authorization id (user) */
# define SASL_AUTHID    1       /* authentication id */
# define SASL_PASSWORD  2       /* password fuer authid */
# define SASL_DEFREALM  3       /* realm to use */
# define SASL_MECHLIST  4       /* list of mechanisms to try */
# define SASL_ID_REALM  5       /* authid@defrealm */

/*
**  Current mechanism; this is just used to convey information between
**  invocation of SASL callback functions.
**  It must be last in the list, because it's not allocated by us
**  and hence we don't free() it.
*/
# define SASL_MECH      6
# define SASL_ENTRIES   7       /* number of entries in array */

# define SASL_USER_BIT          (1 << SASL_USER)
# define SASL_AUTHID_BIT        (1 << SASL_AUTHID)
# define SASL_PASSWORD_BIT      (1 << SASL_PASSWORD)
# define SASL_DEFREALM_BIT      (1 << SASL_DEFREALM)
# define SASL_MECHLIST_BIT      (1 << SASL_MECHLIST)

/* authenticated? */
# define SASL_NOT_AUTH  0               /* not authenticated */
# define SASL_PROC_AUTH 1               /* in process of authenticating */
# define SASL_IS_AUTH   2               /* authenticated */

/* SASL options */
# define SASL_AUTH_AUTH 0x1000          /* use auth= only if authenticated */
# if SASL >= 20101
#  define SASL_SEC_MASK SASL_SEC_MAXIMUM /* mask for SASL_SEC_* values: sasl.h */
# else /* SASL >= 20101 */
#  define SASL_SEC_MASK 0x0fff          /* mask for SASL_SEC_* values: sasl.h */
#  if (SASL_SEC_NOPLAINTEXT & SASL_SEC_MASK) == 0 || \
        (SASL_SEC_NOACTIVE & SASL_SEC_MASK) == 0 || \
        (SASL_SEC_NODICTIONARY & SASL_SEC_MASK) == 0 || \
        (SASL_SEC_FORWARD_SECRECY & SASL_SEC_MASK) == 0 || \
        (SASL_SEC_NOANONYMOUS & SASL_SEC_MASK) == 0 || \
        (SASL_SEC_PASS_CREDENTIALS & SASL_SEC_MASK) == 0
ERROR: change SASL_SEC_MASK_ notify sendmail.org!
#  endif /* SASL_SEC_NOPLAINTEXT & SASL_SEC_MASK) == 0 ... */
# endif /* SASL >= 20101 */
# define MAXOUTLEN 8192 /* length of output buffer, should be 2^n */

/* functions */
extern char     *intersect __P((char *, char *, SM_RPOOL_T *));
extern char     *iteminlist __P((char *, char *, char *));
# if SASL >= 20000
extern int      proxy_policy __P((sasl_conn_t *, void *, const char *, unsigned, const char *, unsigned, const char *, unsigned, struct propctx *));
extern int      safesaslfile __P((void *, const char *, sasl_verify_type_t));
# else /* SASL >= 20000 */
extern int      proxy_policy __P((void *, const char *, const char *, const char **, const char **));
#  if SASL > 10515
extern int      safesaslfile __P((void *, char *, int));
#  else /* SASL > 10515 */
extern int      safesaslfile __P((void *, char *));
#  endif /* SASL > 10515 */
# endif /* SASL >= 20000 */
extern void     stop_sasl_client __P((void));

/* structure to store authinfo */
typedef char *SASL_AI_T[SASL_ENTRIES];

EXTERN char     *AuthMechanisms;        /* AUTH mechanisms */
EXTERN char     *AuthRealm;     /* AUTH realm */
EXTERN char     *SASLInfo;      /* file with AUTH info */
EXTERN int      SASLOpts;       /* options for SASL */
EXTERN int      MaxSLBits;      /* max. encryption bits for SASL */
#endif /* SASL */

/*
**  Structure to store macros.
*/
typedef struct
{
        SM_RPOOL_T      *mac_rpool;             /* resource pool */
        BITMAP256       mac_allocated;          /* storage has been alloc()? */
        char            *mac_table[MAXMACROID + 1];     /* macros */
} MACROS_T;

EXTERN MACROS_T         GlobalMacros;

/*
**  Information about currently open connections to mailers, or to
**  hosts that we have looked up recently.
*/

#define MCI             struct mailer_con_info

MCI
{
        unsigned long   mci_flags;      /* flag bits, see below */
        short           mci_errno;      /* error number on last connection */
        short           mci_herrno;     /* h_errno from last DNS lookup */
        short           mci_exitstat;   /* exit status from last connection */
        short           mci_state;      /* SMTP state */
        int             mci_deliveries; /* delivery attempts for connection */
        long            mci_maxsize;    /* max size this server will accept */
        SM_FILE_T       *mci_in;        /* input side of connection */
        SM_FILE_T       *mci_out;       /* output side of connection */
        pid_t           mci_pid;        /* process id of subordinate proc */
        char            *mci_phase;     /* SMTP phase string */
        struct mailer   *mci_mailer;    /* ptr to the mailer for this conn */
        char            *mci_host;      /* host name */
        char            *mci_status;    /* DSN status to be copied to addrs */
        char            *mci_rstatus;   /* SMTP status to be copied to addrs */
        time_t          mci_lastuse;    /* last usage time */
        SM_FILE_T       *mci_statfile;  /* long term status file */
        char            *mci_heloname;  /* name to use as HELO arg */
        long            mci_min_by;     /* minimum DELIVERBY */
        bool            mci_retryrcpt;  /* tempfail for at least one rcpt */
        char            *mci_tolist;    /* list of valid recipients */
        SM_RPOOL_T      *mci_rpool;     /* resource pool */
#if PIPELINING
        int             mci_okrcpts;    /* number of valid recipients */
        ADDRESS         *mci_nextaddr;  /* next address for pipelined status */
#endif /* PIPELINING */
#if SASL
        SASL_AI_T       mci_sai;        /* authentication info */
        bool            mci_sasl_auth;  /* authenticated? */
        int             mci_sasl_string_len;
        char            *mci_sasl_string;       /* sasl reply string */
        char            *mci_saslcap;   /* SASL list of mechanisms */
        sasl_conn_t     *mci_conn;      /* SASL connection */
#endif /* SASL */
#if STARTTLS
        SSL             *mci_ssl;       /* SSL connection */
#endif /* STARTTLS */
        MACROS_T        mci_macro;      /* macro definitions */
};


/* flag bits */
#define MCIF_VALID      0x00000001      /* this entry is valid */
/* 0x00000002 unused, was MCIF_TEMP */
#define MCIF_CACHED     0x00000004      /* currently in open cache */
#define MCIF_ESMTP      0x00000008      /* this host speaks ESMTP */
#define MCIF_EXPN       0x00000010      /* EXPN command supported */
#define MCIF_SIZE       0x00000020      /* SIZE option supported */
#define MCIF_8BITMIME   0x00000040      /* BODY=8BITMIME supported */
#define MCIF_7BIT       0x00000080      /* strip this message to 7 bits */
/* 0x00000100 unused, was MCIF_MULTSTAT: MAIL11V3: handles MULT status */
#define MCIF_INHEADER   0x00000200      /* currently outputing header */
#define MCIF_CVT8TO7    0x00000400      /* convert from 8 to 7 bits */
#define MCIF_DSN        0x00000800      /* DSN extension supported */
#define MCIF_8BITOK     0x00001000      /* OK to send 8 bit characters */
#define MCIF_CVT7TO8    0x00002000      /* convert from 7 to 8 bits */
#define MCIF_INMIME     0x00004000      /* currently reading MIME header */
#define MCIF_AUTH       0x00008000      /* AUTH= supported */
#define MCIF_AUTHACT    0x00010000      /* SASL (AUTH) active */
#define MCIF_ENHSTAT    0x00020000      /* ENHANCEDSTATUSCODES supported */
#define MCIF_PIPELINED  0x00040000      /* PIPELINING supported */
#define MCIF_VERB       0x00080000      /* VERB supported */
#if STARTTLS
#define MCIF_TLS        0x00100000      /* STARTTLS supported */
#define MCIF_TLSACT     0x00200000      /* STARTTLS active */
#define MCIF_EXTENS     (MCIF_EXPN | MCIF_SIZE | MCIF_8BITMIME | MCIF_DSN | MCIF_8BITOK | MCIF_AUTH | MCIF_ENHSTAT | MCIF_TLS)
#else /* STARTTLS */
#define MCIF_EXTENS     (MCIF_EXPN | MCIF_SIZE | MCIF_8BITMIME | MCIF_DSN | MCIF_8BITOK | MCIF_AUTH | MCIF_ENHSTAT)
#endif /* STARTTLS */
#define MCIF_DLVR_BY    0x00400000      /* DELIVERBY */
#if _FFR_IGNORE_EXT_ON_HELO
# define MCIF_HELO      0x00800000      /* we used HELO: ignore extensions */
#endif /* _FFR_IGNORE_EXT_ON_HELO */
#define MCIF_INLONGLINE 0x01000000      /* in the middle of a long line */
#define MCIF_ONLY_EHLO  0x10000000      /* use only EHLO in smtpinit */

/* states */
#define MCIS_CLOSED     0               /* no traffic on this connection */
#define MCIS_OPENING    1               /* sending initial protocol */
#define MCIS_OPEN       2               /* open, initial protocol sent */
#define MCIS_MAIL       3               /* MAIL command sent */
#define MCIS_RCPT       4               /* RCPT commands being sent */
#define MCIS_DATA       5               /* DATA command sent */
#define MCIS_QUITING    6               /* running quit protocol */
#define MCIS_SSD        7               /* service shutting down */
#define MCIS_ERROR      8               /* I/O error on connection */

/* functions */
extern void     mci_cache __P((MCI *));
extern void     mci_close __P((MCI *, char *where));
extern void     mci_dump __P((SM_FILE_T *, MCI *, bool));
extern void     mci_dump_all __P((SM_FILE_T *, bool));
extern void     mci_flush __P((bool, MCI *));
extern MCI      *mci_get __P((char *, MAILER *));
extern int      mci_lock_host __P((MCI *));
extern bool     mci_match __P((char *, MAILER *));
extern int      mci_print_persistent __P((char *, char *));
extern int      mci_purge_persistent __P((char *, char *));
extern MCI      **mci_scan __P((MCI *));
extern void     mci_setstat __P((MCI *, int, char *, char *));
extern void     mci_store_persistent __P((MCI *));
extern int      mci_traverse_persistent __P((int (*)(char *, char *), char *));
extern void     mci_unlock_host __P((MCI *));

EXTERN int      MaxMciCache;            /* maximum entries in MCI cache */
EXTERN time_t   MciCacheTimeout;        /* maximum idle time on connections */
EXTERN time_t   MciInfoTimeout;         /* how long 'til we retry down hosts */

/*
**  Header structure.
**      This structure is used internally to store header items.
*/

struct header
{
        char            *h_field;       /* the name of the field */
        char            *h_value;       /* the value of that field */
        struct header   *h_link;        /* the next header */
        unsigned char   h_macro;        /* include header if macro defined */
        unsigned long   h_flags;        /* status bits, see below */
        BITMAP256       h_mflags;       /* m_flags bits needed */
};

typedef struct header   HDR;

/*
**  Header information structure.
**      Defined in conf.c, this struct declares the header fields
**      that have some magic meaning.
*/

struct hdrinfo
{
        char            *hi_field;      /* the name of the field */
        unsigned long   hi_flags;       /* status bits, see below */
        char            *hi_ruleset;    /* validity check ruleset */
};

extern struct hdrinfo   HdrInfo[];

/* bits for h_flags and hi_flags */
#define H_EOH           0x00000001      /* field terminates header */
#define H_RCPT          0x00000002      /* contains recipient addresses */
#define H_DEFAULT       0x00000004      /* if another value is found, drop this */
#define H_RESENT        0x00000008      /* this address is a "Resent-..." address */
#define H_CHECK         0x00000010      /* check h_mflags against m_flags */
#define H_ACHECK        0x00000020      /* ditto, but always (not just default) */
#define H_FORCE         0x00000040      /* force this field, even if default */
#define H_TRACE         0x00000080      /* this field contains trace information */
#define H_FROM          0x00000100      /* this is a from-type field */
#define H_VALID         0x00000200      /* this field has a validated value */
#define H_RECEIPTTO     0x00000400      /* field has return receipt info */
#define H_ERRORSTO      0x00000800      /* field has error address info */
#define H_CTE           0x00001000      /* field is a content-transfer-encoding */
#define H_CTYPE         0x00002000      /* this is a content-type field */
#define H_BCC           0x00004000      /* Bcc: header: strip value or delete */
#define H_ENCODABLE     0x00008000      /* field can be RFC 1522 encoded */
#define H_STRIPCOMM     0x00010000      /* header check: strip comments */
#define H_BINDLATE      0x00020000      /* only expand macros at deliver */
#define H_USER          0x00040000      /* header came from the user/SMTP */

/* bits for chompheader() */
#define CHHDR_DEF       0x0001  /* default header */
#define CHHDR_CHECK     0x0002  /* call ruleset for header */
#define CHHDR_USER      0x0004  /* header from user */
#define CHHDR_QUEUE     0x0008  /* header from queue file */

/* functions */
extern void     addheader __P((char *, char *, int, ENVELOPE *, bool));
extern unsigned long    chompheader __P((char *, int, HDR **, ENVELOPE *));
extern bool     commaize __P((HDR *, char *, bool, MCI *, ENVELOPE *, int));
extern HDR      *copyheader __P((HDR *, SM_RPOOL_T *));
extern void     eatheader __P((ENVELOPE *, bool, bool));
extern char     *hvalue __P((char *, HDR *));
extern void     insheader __P((int, char *, char *, int, ENVELOPE *, bool));
extern bool     isheader __P((char *));
extern bool     putfromline __P((MCI *, ENVELOPE *));
extern void     setupheaders __P((void));

/*
**  Performance monitoring
*/

#define TIMERS          struct sm_timers

TIMERS
{
        TIMER   ti_overall;     /* the whole process */
};


#define PUSHTIMER(l, t) { if (tTd(98, l)) pushtimer(&t); }
#define POPTIMER(l, t)  { if (tTd(98, l)) poptimer(&t); }

/*
**  Envelope structure.
**      This structure defines the message itself.  There is usually
**      only one of these -- for the message that we originally read
**      and which is our primary interest -- but other envelopes can
**      be generated during processing.  For example, error messages
**      will have their own envelope.
*/

struct envelope
{
        HDR             *e_header;      /* head of header list */
        long            e_msgpriority;  /* adjusted priority of this message */
        time_t          e_ctime;        /* time message appeared in the queue */
        char            *e_to;          /* (list of) target person(s) */
        ADDRESS         e_from;         /* the person it is from */
        char            *e_sender;      /* e_from.q_paddr w comments stripped */
        char            **e_fromdomain; /* the domain part of the sender */
        ADDRESS         *e_sendqueue;   /* list of message recipients */
        ADDRESS         *e_errorqueue;  /* the queue for error responses */

        /*
        **  Overflow detection is based on < 0, so don't change this
        **  to unsigned.  We don't use unsigned and == ULONG_MAX because
        **  some libc's don't have strtoul(), see mail_esmtp_args().
        */

        long            e_msgsize;      /* size of the message in bytes */
        char            *e_msgid;       /* message id (for logging) */
        unsigned long   e_flags;        /* flags, see below */
        int             e_nrcpts;       /* number of recipients */
        short           e_class;        /* msg class (priority, junk, etc.) */
        short           e_hopcount;     /* number of times processed */
        short           e_nsent;        /* number of sends since checkpoint */
        short           e_sendmode;     /* message send mode */
        short           e_errormode;    /* error return mode */
        short           e_timeoutclass; /* message timeout class */
        bool            (*e_puthdr)__P((MCI *, HDR *, ENVELOPE *, int));
                                        /* function to put header of message */
        bool            (*e_putbody)__P((MCI *, ENVELOPE *, char *));
                                        /* function to put body of message */
        ENVELOPE        *e_parent;      /* the message this one encloses */
        ENVELOPE        *e_sibling;     /* the next envelope of interest */
        char            *e_bodytype;    /* type of message body */
        SM_FILE_T       *e_dfp;         /* data file */
        char            *e_id;          /* code for this entry in queue */
#if _FFR_SESSID
        char            *e_sessid;      /* session ID for this envelope */
#endif /* _FFR_SESSID */
        int             e_qgrp;         /* queue group (index into queues) */
        int             e_qdir;         /* index into queue directories */
        int             e_dfqgrp;       /* data file queue group index */
        int             e_dfqdir;       /* data file queue directory index */
        int             e_xfqgrp;       /* queue group (index into queues) */
        int             e_xfqdir;       /* index into queue directories (xf) */
        SM_FILE_T       *e_xfp;         /* transcript file */
        SM_FILE_T       *e_lockfp;      /* the lock file for this message */
        char            *e_message;     /* error message; readonly; NULL,
                                         * or allocated from e_rpool */
        char            *e_statmsg;     /* stat msg (changes per delivery).
                                         * readonly. NULL or allocated from
                                         * e_rpool. */
        char            *e_quarmsg;     /* why envelope is quarantined */
        char            e_qfletter;     /* queue file letter on disk */
        char            *e_msgboundary; /* MIME-style message part boundary */
        char            *e_origrcpt;    /* original recipient (one only) */
        char            *e_envid;       /* envelope id from MAIL FROM: line */
        char            *e_status;      /* DSN status for this message */
        time_t          e_dtime;        /* time of last delivery attempt */
        int             e_ntries;       /* number of delivery attempts */
        dev_t           e_dfdev;        /* data file device (crash recovery) */
        ino_t           e_dfino;        /* data file inode (crash recovery) */
        MACROS_T        e_macro;        /* macro definitions */
        MCI             *e_mci;         /* connection info */
        char            *e_auth_param;  /* readonly; NULL or static storage or
                                         * allocated from e_rpool */
        TIMERS          e_timers;       /* per job timers */
        long            e_deliver_by;   /* deliver by */
        int             e_dlvr_flag;    /* deliver by flag */
        SM_RPOOL_T      *e_rpool;       /* resource pool for this envelope */
        unsigned int    e_features;     /* server features */
#if _FFR_MILTER_ENHSC
#define ENHSC_LEN       11
        char            e_enhsc[ENHSC_LEN];     /* enhanced status code */
#endif /* _FFR_MILTER_ENHSC */
};

/* values for e_flags */
#define EF_OLDSTYLE     0x00000001L     /* use spaces (not commas) in hdrs */
#define EF_INQUEUE      0x00000002L     /* this message is fully queued */
#define EF_NO_BODY_RETN 0x00000004L     /* omit message body on error */
#define EF_CLRQUEUE     0x00000008L     /* disk copy is no longer needed */
#define EF_SENDRECEIPT  0x00000010L     /* send a return receipt */
#define EF_FATALERRS    0x00000020L     /* fatal errors occurred */
#define EF_DELETE_BCC   0x00000040L     /* delete Bcc: headers entirely */
#define EF_RESPONSE     0x00000080L     /* this is an error or return receipt */
#define EF_RESENT       0x00000100L     /* this message is being forwarded */
#define EF_VRFYONLY     0x00000200L     /* verify only (don't expand aliases) */
#define EF_WARNING      0x00000400L     /* warning message has been sent */
#define EF_QUEUERUN     0x00000800L     /* this envelope is from queue */
#define EF_GLOBALERRS   0x00001000L     /* treat errors as global */
#define EF_PM_NOTIFY    0x00002000L     /* send return mail to postmaster */
#define EF_METOO        0x00004000L     /* send to me too */
#define EF_LOGSENDER    0x00008000L     /* need to log the sender */
#define EF_NORECEIPT    0x00010000L     /* suppress all return-receipts */
#define EF_HAS8BIT      0x00020000L     /* at least one 8-bit char in body */
#define EF_NL_NOT_EOL   0x00040000L     /* don't accept raw NL as EOLine */
#define EF_CRLF_NOT_EOL 0x00080000L     /* don't accept CR-LF as EOLine */
#define EF_RET_PARAM    0x00100000L     /* RCPT command had RET argument */
#define EF_HAS_DF       0x00200000L     /* set when data file is instantiated */
#define EF_IS_MIME      0x00400000L     /* really is a MIME message */
#define EF_DONT_MIME    0x00800000L     /* never MIME this message */
#define EF_DISCARD      0x01000000L     /* discard the message */
#define EF_TOOBIG       0x02000000L     /* message is too big */
#define EF_SPLIT        0x04000000L     /* envelope has been split */
#define EF_UNSAFE       0x08000000L     /* unsafe: read from untrusted source */
#define EF_TOODEEP      0x10000000L     /* message is nested too deep */

#define DLVR_NOTIFY     0x01
#define DLVR_RETURN     0x02
#define DLVR_TRACE      0x10
#define IS_DLVR_NOTIFY(e)       (((e)->e_dlvr_flag & DLVR_NOTIFY) != 0)
#define IS_DLVR_RETURN(e)       (((e)->e_dlvr_flag & DLVR_RETURN) != 0)
#define IS_DLVR_TRACE(e)        (((e)->e_dlvr_flag & DLVR_TRACE) != 0)
#define IS_DLVR_BY(e)           ((e)->e_dlvr_flag != 0)

#define BODYTYPE_NONE   (0)
#define BODYTYPE_7BIT   (1)
#define BODYTYPE_8BITMIME       (2)
#define BODYTYPE_ILLEGAL        (-1)
#define BODYTYPE_VALID(b) ((b) == BODYTYPE_7BIT || (b) == BODYTYPE_8BITMIME)

extern ENVELOPE BlankEnvelope;

/* functions */
extern void     clearenvelope __P((ENVELOPE *, bool, SM_RPOOL_T *));
extern int      dropenvelope __P((ENVELOPE *, bool, bool));
extern ENVELOPE *newenvelope __P((ENVELOPE *, ENVELOPE *, SM_RPOOL_T *));
extern void     clrsessenvelope __P((ENVELOPE *));
extern void     printenvflags __P((ENVELOPE *));
extern bool     putbody __P((MCI *, ENVELOPE *, char *));
extern bool     putheader __P((MCI *, HDR *, ENVELOPE *, int));

/*
**  Message priority classes.
**
**      The message class is read directly from the Priority: header
**      field in the message.
**
**      CurEnv->e_msgpriority is the number of bytes in the message plus
**      the creation time (so that jobs ``tend'' to be ordered correctly),
**      adjusted by the message class, the number of recipients, and the
**      amount of time the message has been sitting around.  This number
**      is used to order the queue.  Higher values mean LOWER priority.
**
**      Each priority class point is worth WkClassFact priority points;
**      each recipient is worth WkRecipFact priority points.  Each time
**      we reprocess a message the priority is adjusted by WkTimeFact.
**      WkTimeFact should normally decrease the priority so that jobs
**      that have historically failed will be run later; thanks go to
**      Jay Lepreau at Utah for pointing out the error in my thinking.
**
**      The "class" is this number, unadjusted by the age or size of
**      this message.  Classes with negative representations will have
**      error messages thrown away if they are not local.
*/

struct priority
{
        char    *pri_name;      /* external name of priority */
        int     pri_val;        /* internal value for same */
};

EXTERN int      NumPriorities;  /* pointer into Priorities */
EXTERN struct priority  Priorities[MAXPRIORITIES];

/*
**  Rewrite rules.
*/

struct rewrite
{
        char    **r_lhs;        /* pattern match */
        char    **r_rhs;        /* substitution value */
        struct rewrite  *r_next;/* next in chain */
        int     r_line;         /* rule line in sendmail.cf */
};

/*
**  Special characters in rewriting rules.
**      These are used internally only.
**      The COND* rules are actually used in macros rather than in
**              rewriting rules, but are given here because they
**              cannot conflict.
*/

/* "out of band" indicator */
/* sm/sendmail.h #define METAQUOTE ((unsigned char)0377) quotes the next octet */

/* left hand side items */
#define MATCHZANY       ((unsigned char)0220)   /* match zero or more tokens */
#define MATCHANY        ((unsigned char)0221)   /* match one or more tokens */
#define MATCHONE        ((unsigned char)0222)   /* match exactly one token */
#define MATCHCLASS      ((unsigned char)0223)   /* match one token in a class */
#define MATCHNCLASS     ((unsigned char)0224)   /* match tokens not in class */

/* right hand side items */
#define MATCHREPL       ((unsigned char)0225)   /* RHS replacement for above */
#define CANONNET        ((unsigned char)0226)   /* canonical net, next token */
#define CANONHOST       ((unsigned char)0227)   /* canonical host, next token */
#define CANONUSER       ((unsigned char)0230)   /* canonical user, next N tokens */
#define CALLSUBR        ((unsigned char)0231)   /* call another rewriting set */

/* conditionals in macros (anywhere) */
#define CONDIF          ((unsigned char)0232)   /* conditional if-then */
#define CONDELSE        ((unsigned char)0233)   /* conditional else */
#define CONDFI          ((unsigned char)0234)   /* conditional fi */

/* bracket characters for RHS host name lookup */
#define HOSTBEGIN       ((unsigned char)0235)   /* hostname lookup begin */
#define HOSTEND         ((unsigned char)0236)   /* hostname lookup end */

/* bracket characters for RHS generalized lookup */
#define LOOKUPBEGIN     ((unsigned char)0205)   /* generalized lookup begin */
#define LOOKUPEND       ((unsigned char)0206)   /* generalized lookup end */

/* macro substitution characters (anywhere) */
#define MACROEXPAND     ((unsigned char)0201)   /* macro expansion */
#define MACRODEXPAND    ((unsigned char)0202)   /* deferred macro expansion */

/* to make the code clearer */
#define MATCHZERO       CANONHOST

#define MAXMATCH        9       /* max params per rewrite */
#define MAX_MAP_ARGS    10      /* max arguments for map */

/* external <==> internal mapping table */
struct metamac
{
        char            metaname;       /* external code (after $) */
        unsigned char   metaval;        /* internal code (as above) */
};

/* values for macros with external names only */
#define MID_OPMODE      0202    /* operation mode */

/* functions */
#if SM_HEAP_CHECK
extern void
macdefine_tagged __P((
        MACROS_T *_mac,
        ARGCLASS_T _vclass,
        int _id,
        char *_value,
        char *_file,
        int _line,
        int _group));
# define macdefine(mac,c,id,v) \
        macdefine_tagged(mac,c,id,v,__FILE__,__LINE__,sm_heap_group())
#else /* SM_HEAP_CHECK */
extern void
macdefine __P((
        MACROS_T *_mac,
        ARGCLASS_T _vclass,
        int _id,
        char *_value));
# define macdefine_tagged(mac,c,id,v,file,line,grp) macdefine(mac,c,id,v)
#endif /* SM_HEAP_CHECK */
extern void     macset __P((MACROS_T *, int, char *));
#define macget(mac, i) (mac)->mac_table[i]
extern void     expand __P((char *, char *, size_t, ENVELOPE *));
extern int      macid_parse __P((char *, char **));
#define macid(name)  macid_parse(name, NULL)
extern char     *macname __P((int));
extern char     *macvalue __P((int, ENVELOPE *));
extern int      rscheck __P((char *, char *, char *, ENVELOPE *, int, int, char *, char *, ADDRESS *));
extern int      rscap __P((char *, char *, char *, ENVELOPE *, char ***, char *, int));
extern void     setclass __P((int, char *));
extern int      strtorwset __P((char *, char **, int));
extern char     *translate_dollars __P((char *, char *, int *));
extern bool     wordinclass __P((char *, int));

/*
**  Name canonification short circuit.
**
**      If the name server for a host is down, the process of trying to
**      canonify the name can hang.  This is similar to (but alas, not
**      identical to) looking up the name for delivery.  This stab type
**      caches the result of the name server lookup so we don't hang
**      multiple times.
*/

#define NAMECANON       struct _namecanon

NAMECANON
{
        short           nc_errno;       /* cached errno */
        short           nc_herrno;      /* cached h_errno */
        short           nc_stat;        /* cached exit status code */
        short           nc_flags;       /* flag bits */
        char            *nc_cname;      /* the canonical name */
        time_t          nc_exp;         /* entry expires at */
};

/* values for nc_flags */
#define NCF_VALID       0x0001  /* entry valid */

/* hostsignature structure */

struct hostsig_t
{
        char            *hs_sig;        /* hostsignature */
        time_t          hs_exp;         /* entry expires at */
};

typedef struct hostsig_t HOSTSIG_T;

/* functions */
extern bool     getcanonname __P((char *, int, bool, int *));
extern int      getmxrr __P((char *, char **, unsigned short *, bool, int *, bool, int *));
extern char     *hostsignature __P((MAILER *, char *));
extern int      getfallbackmxrr __P((char *));

/*
**  Mapping functions
**
**      These allow arbitrary mappings in the config file.  The idea
**      (albeit not the implementation) comes from IDA sendmail.
*/

#define MAPCLASS        struct _mapclass
#define MAP             struct _map
#define MAXMAPACTIONS   5               /* size of map_actions array */


/*
**  An actual map.
*/

MAP
{
        MAPCLASS        *map_class;     /* the class of this map */
        MAPCLASS        *map_orgclass;  /* the original class of this map */
        char            *map_mname;     /* name of this map */
        long            map_mflags;     /* flags, see below */
        char            *map_file;      /* the (nominal) filename */
        ARBPTR_T        map_db1;        /* the open database ptr */
        ARBPTR_T        map_db2;        /* an "extra" database pointer */
        char            *map_keycolnm;  /* key column name */
        char            *map_valcolnm;  /* value column name */
        unsigned char   map_keycolno;   /* key column number */
        unsigned char   map_valcolno;   /* value column number */
        char            map_coldelim;   /* column delimiter */
        char            map_spacesub;   /* spacesub */
        char            *map_app;       /* to append to successful matches */
        char            *map_tapp;      /* to append to "tempfail" matches */
        char            *map_domain;    /* the (nominal) NIS domain */
        char            *map_rebuild;   /* program to run to do auto-rebuild */
        time_t          map_mtime;      /* last database modification time */
        time_t          map_timeout;    /* timeout for map accesses */
        int             map_retry;      /* # of retries for map accesses */
        pid_t           map_pid;        /* PID of process which opened map */
        int             map_lockfd;     /* auxiliary lock file descriptor */
        short           map_specificity;        /* specificity of aliases */
        MAP             *map_stack[MAXMAPSTACK];   /* list for stacked maps */
        short           map_return[MAXMAPACTIONS]; /* return bitmaps for stacked maps */
};


/* bit values for map_mflags */
#define MF_VALID        0x00000001      /* this entry is valid */
#define MF_INCLNULL     0x00000002      /* include null byte in key */
#define MF_OPTIONAL     0x00000004      /* don't complain if map not found */
#define MF_NOFOLDCASE   0x00000008      /* don't fold case in keys */
#define MF_MATCHONLY    0x00000010      /* don't use the map value */
#define MF_OPEN         0x00000020      /* this entry is open */
#define MF_WRITABLE     0x00000040      /* open for writing */
#define MF_ALIAS        0x00000080      /* this is an alias file */
#define MF_TRY0NULL     0x00000100      /* try with no null byte */
#define MF_TRY1NULL     0x00000200      /* try with the null byte */
#define MF_LOCKED       0x00000400      /* this map is currently locked */
#define MF_ALIASWAIT    0x00000800      /* alias map in aliaswait state */
#define MF_IMPL_HASH    0x00001000      /* implicit: underlying hash database */
#define MF_IMPL_NDBM    0x00002000      /* implicit: underlying NDBM database */
/* 0x00004000   */
#define MF_APPEND       0x00008000      /* append new entry on rebuild */
#define MF_KEEPQUOTES   0x00010000      /* don't dequote key before lookup */
#define MF_NODEFER      0x00020000      /* don't defer if map lookup fails */
#define MF_REGEX_NOT    0x00040000      /* regular expression negation */
#define MF_DEFER        0x00080000      /* don't lookup map in defer mode */
#define MF_SINGLEMATCH  0x00100000      /* successful only if match one key */
#define MF_SINGLEDN     0x00200000      /* only one match, but multi values */
#define MF_FILECLASS    0x00400000      /* this is a file class map */
#define MF_OPENBOGUS    0x00800000      /* open failed, don't call map_close */
#define MF_CLOSING      0x01000000      /* map is being closed */

#define DYNOPENMAP(map) if (!bitset(MF_OPEN, (map)->map_mflags)) \
        {       \
                if (!openmap(map))      \
                        return NULL;    \
        }


/* indices for map_actions */
#define MA_NOTFOUND     0               /* member map returned "not found" */
#define MA_UNAVAIL      1               /* member map is not available */
#define MA_TRYAGAIN     2               /* member map returns temp failure */

/* macros to handle MapTempFail */
#define BIT_IS_MTP      0x01    /* temp.failure occurred */
#define BIT_ASK_MTP     0x02    /* do we care about MapTempFail? */
#define RESET_MAPTEMPFAIL       MapTempFail = 0
#define INIT_MAPTEMPFAIL        MapTempFail = BIT_ASK_MTP
#define SET_MAPTEMPFAIL         MapTempFail |= BIT_IS_MTP
#define IS_MAPTEMPFAIL          bitset(BIT_IS_MTP, MapTempFail)
#define ASK_MAPTEMPFAIL         bitset(BIT_ASK_MTP, MapTempFail)

/*
**  The class of a map -- essentially the functions to call
*/

MAPCLASS
{
        char    *map_cname;             /* name of this map class */
        char    *map_ext;               /* extension for database file */
        short   map_cflags;             /* flag bits, see below */
        bool    (*map_parse)__P((MAP *, char *));
                                        /* argument parsing function */
        char    *(*map_lookup)__P((MAP *, char *, char **, int *));
                                        /* lookup function */
        void    (*map_store)__P((MAP *, char *, char *));
                                        /* store function */
        bool    (*map_open)__P((MAP *, int));
                                        /* open function */
        void    (*map_close)__P((MAP *));
                                        /* close function */
};

/* bit values for map_cflags */
#define MCF_ALIASOK     0x0001          /* can be used for aliases */
#define MCF_ALIASONLY   0x0002          /* usable only for aliases */
#define MCF_REBUILDABLE 0x0004          /* can rebuild alias files */
#define MCF_OPTFILE     0x0008          /* file name is optional */
#define MCF_NOTPERSIST  0x0010          /* don't keep map open all the time */

/* functions */
extern void     closemaps __P((bool));
extern bool     impl_map_open __P((MAP *, int));
extern void     initmaps __P((void));
extern MAP      *makemapentry __P((char *));
extern void     maplocaluser __P((ADDRESS *, ADDRESS **, int, ENVELOPE *));
extern char     *map_rewrite __P((MAP *, const char *, size_t, char **));
#if NETINFO
extern char     *ni_propval __P((char *, char *, char *, char *, int));
#endif /* NETINFO */
extern bool     openmap __P((MAP *));
extern int      udbexpand __P((ADDRESS *, ADDRESS **, int, ENVELOPE *));
#if USERDB
extern void     _udbx_close __P((void));
extern char     *udbsender __P((char *, SM_RPOOL_T *));
#endif /* USERDB */

/*
**  LDAP related items
*/
#if LDAPMAP
/* struct defining LDAP Auth Methods */
struct lamvalues
{
        char    *lam_name;      /* name of LDAP auth method */
        int     lam_code;       /* numeric code */
};

/* struct defining LDAP Alias Dereferencing */
struct ladvalues
{
        char    *lad_name;      /* name of LDAP alias dereferencing method */
        int     lad_code;       /* numeric code */
};

/* struct defining LDAP Search Scope */
struct lssvalues
{
        char    *lss_name;      /* name of LDAP search scope */
        int     lss_code;       /* numeric code */
};

/* functions */
extern bool     ldapmap_parseargs __P((MAP *, char *));
extern void     ldapmap_set_defaults __P((char *));
#endif /* LDAPMAP */

/*
**  PH related items
*/

#if PH_MAP

# include <phclient.h>

struct ph_map_struct
{
        char    *ph_servers;     /* list of ph servers */
        char    *ph_field_list;  /* list of fields to search for match */
        PH      *ph;             /* PH server handle */
        int     ph_fastclose;    /* send "quit" command on close */
        time_t  ph_timeout;      /* timeout interval */
};
typedef struct ph_map_struct    PH_MAP_STRUCT;

#endif /* PH_MAP */

/*
**  Regular UNIX sockaddrs are too small to handle ISO addresses, so
**  we are forced to declare a supertype here.
*/

#if NETINET || NETINET6 || NETUNIX || NETISO || NETNS || NETX25
union bigsockaddr
{
        struct sockaddr         sa;     /* general version */
# if NETUNIX
        struct sockaddr_un      sunix;  /* UNIX family */
# endif /* NETUNIX */
# if NETINET
        struct sockaddr_in      sin;    /* INET family */
# endif /* NETINET */
# if NETINET6
        struct sockaddr_in6     sin6;   /* INET/IPv6 */
# endif /* NETINET6 */
# if NETISO
        struct sockaddr_iso     siso;   /* ISO family */
# endif /* NETISO */
# if NETNS
        struct sockaddr_ns      sns;    /* XNS family */
# endif /* NETNS */
# if NETX25
        struct sockaddr_x25     sx25;   /* X.25 family */
# endif /* NETX25 */
};

# define SOCKADDR       union bigsockaddr

/* functions */
extern char     *anynet_ntoa __P((SOCKADDR *));
# if NETINET6
extern char     *anynet_ntop __P((struct in6_addr *, char *, size_t));
extern int      anynet_pton __P((int, const char *, void *));
# endif /* NETINET6 */
extern char     *hostnamebyanyaddr __P((SOCKADDR *));
extern char     *validate_connection __P((SOCKADDR *, char *, ENVELOPE *));
# if SASL >= 20000
extern bool     iptostring __P((SOCKADDR *, SOCKADDR_LEN_T, char *, unsigned));
# endif /* SASL >= 20000 */

#endif /* NETINET || NETINET6 || NETUNIX || NETISO || NETNS || NETX25 */

/*
**  Process List (proclist)
*/

#define NO_PID          ((pid_t) 0)
#ifndef PROC_LIST_SEG
# define PROC_LIST_SEG  32              /* number of pids to alloc at a time */
#endif /* ! PROC_LIST_SEG */

/* process types */
#define PROC_NONE               0
#define PROC_DAEMON             1
#define PROC_DAEMON_CHILD       2
#define PROC_QUEUE              3
#define PROC_QUEUE_CHILD        3
#define PROC_CONTROL            4
#define PROC_CONTROL_CHILD      5

/* functions */
extern void     proc_list_add __P((pid_t, char *, int, int, int, SOCKADDR *));
extern void     proc_list_clear __P((void));
extern void     proc_list_display __P((SM_FILE_T *, char *));
extern void     proc_list_drop __P((pid_t, int, int *));
extern void     proc_list_probe __P((void));
extern void     proc_list_set __P((pid_t, char *));
extern void     proc_list_signal __P((int, int));

/*
**  Symbol table definitions
*/

struct symtab
{
        char            *s_name;        /* name to be entered */
        short           s_symtype;      /* general type (see below) */
        struct symtab   *s_next;        /* pointer to next in chain */
        union
        {
                BITMAP256       sv_class;       /* bit-map of word classes */
                ADDRESS         *sv_addr;       /* pointer to address header */
                MAILER          *sv_mailer;     /* pointer to mailer */
                char            *sv_alias;      /* alias */
                MAPCLASS        sv_mapclass;    /* mapping function class */
                MAP             sv_map;         /* mapping function */
                HOSTSIG_T       sv_hostsig;     /* host signature */
                MCI             sv_mci;         /* mailer connection info */
                NAMECANON       sv_namecanon;   /* canonical name cache */
                int             sv_macro;       /* macro name => id mapping */
                int             sv_ruleset;     /* ruleset index */
                struct hdrinfo  sv_header;      /* header metainfo */
                char            *sv_service[MAXMAPSTACK]; /* service switch */
#if LDAPMAP
                MAP             *sv_lmap;       /* Maps for LDAP connection */
#endif /* LDAPMAP */
#if SOCKETMAP
                MAP             *sv_socketmap;  /* Maps for SOCKET connection */
#endif /* SOCKETMAP */
#if MILTER
                struct milter   *sv_milter;     /* milter filter name */
#endif /* MILTER */
                QUEUEGRP        *sv_queue;      /* pointer to queue */
        }       s_value;
};

typedef struct symtab   STAB;

/* symbol types */
#define ST_UNDEF        0       /* undefined type */
#define ST_CLASS        1       /* class map */
#define ST_ADDRESS      2       /* an address in parsed format */
#define ST_MAILER       3       /* a mailer header */
#define ST_ALIAS        4       /* an alias */
#define ST_MAPCLASS     5       /* mapping function class */
#define ST_MAP          6       /* mapping function */
#define ST_HOSTSIG      7       /* host signature */
#define ST_NAMECANON    8       /* cached canonical name */
#define ST_MACRO        9       /* macro name to id mapping */
#define ST_RULESET      10      /* ruleset index */
#define ST_SERVICE      11      /* service switch entry */
#define ST_HEADER       12      /* special header flags */
#if LDAPMAP
# define ST_LMAP        13      /* List head of maps for LDAP connection */
#endif /* LDAPMAP */
#if MILTER
# define ST_MILTER      14      /* milter filter */
#endif /* MILTER */
#define ST_QUEUE        15      /* a queue entry */

#if SOCKETMAP
# define ST_SOCKETMAP   16      /* List head of maps for SOCKET connection */
#endif /* SOCKETMAP */

/* This entry must be last */
#define ST_MCI          17      /* mailer connection info (offset) */

#define s_class         s_value.sv_class
#define s_address       s_value.sv_addr
#define s_mailer        s_value.sv_mailer
#define s_alias         s_value.sv_alias
#define s_mci           s_value.sv_mci
#define s_mapclass      s_value.sv_mapclass
#define s_hostsig       s_value.sv_hostsig
#define s_map           s_value.sv_map
#define s_namecanon     s_value.sv_namecanon
#define s_macro         s_value.sv_macro
#define s_ruleset       s_value.sv_ruleset
#define s_service       s_value.sv_service
#define s_header        s_value.sv_header
#if LDAPMAP
# define s_lmap         s_value.sv_lmap
#endif /* LDAPMAP */
#if SOCKETMAP
# define s_socketmap    s_value.sv_socketmap
#endif /* SOCKETMAP */
#if MILTER
# define s_milter       s_value.sv_milter
#endif /* MILTER */
#define s_quegrp        s_value.sv_queue

/* opcodes to stab */
#define ST_FIND         0       /* find entry */
#define ST_ENTER        1       /* enter if not there */

/* functions */
extern STAB     *stab __P((char *, int, int));
extern void     stabapply __P((void (*)(STAB *, int), int));

/*
**  Operation, send, error, and MIME modes
**
**      The operation mode describes the basic operation of sendmail.
**      This can be set from the command line, and is "send mail" by
**      default.
**
**      The send mode tells how to send mail.  It can be set in the
**      configuration file.  Its setting determines how quickly the
**      mail will be delivered versus the load on your system.  If the
**      -v (verbose) flag is given, it will be forced to SM_DELIVER
**      mode.
**
**      The error mode tells how to return errors.
*/

#define MD_DELIVER      'm'             /* be a mail sender */
#define MD_SMTP         's'             /* run SMTP on standard input */
#define MD_ARPAFTP      'a'             /* obsolete ARPANET mode (Grey Book) */
#define MD_DAEMON       'd'             /* run as a daemon */
#define MD_FGDAEMON     'D'             /* run daemon in foreground */
#define MD_LOCAL        'l'             /* like daemon, but localhost only */
#define MD_VERIFY       'v'             /* verify: don't collect or deliver */
#define MD_TEST         't'             /* test mode: resolve addrs only */
#define MD_INITALIAS    'i'             /* initialize alias database */
#define MD_PRINT        'p'             /* print the queue */
#define MD_PRINTNQE     'P'             /* print number of entries in queue */
#define MD_FREEZE       'z'             /* freeze the configuration file */
#define MD_HOSTSTAT     'h'             /* print persistent host stat info */
#define MD_PURGESTAT    'H'             /* purge persistent host stat info */
#define MD_QUEUERUN     'q'             /* queue run */
#define MD_CHECKCONFIG  'C'             /* check configuration file */

#if _FFR_LOCAL_DAEMON
EXTERN bool     LocalDaemon;
#else /* _FFR_LOCAL_DAEMON */
# define LocalDaemon    false
#endif /* _FFR_LOCAL_DAEMON */

/* Note: see also include/sendmail/pathnames.h: GET_CLIENT_CF */

/* values for e_sendmode -- send modes */
#define SM_DELIVER      'i'             /* interactive delivery */
#define SM_FORK         'b'             /* deliver in background */
#if _FFR_DM_ONE
#define SM_DM_ONE       'o' /* deliver first TA in background, then queue */
#endif /* _FFR_DM_ONE */
#define SM_QUEUE        'q'             /* queue, don't deliver */
#define SM_DEFER        'd'             /* defer map lookups as well as queue */
#define SM_VERIFY       'v'             /* verify only (used internally) */
#define DM_NOTSET       (-1)    /* DeliveryMode (per daemon) option not set */

#define WILL_BE_QUEUED(m)       ((m) == SM_QUEUE || (m) == SM_DEFER)

/* used only as a parameter to sendall */
#define SM_DEFAULT      '\0'            /* unspecified, use SendMode */

/* functions */
extern void     set_delivery_mode __P((int, ENVELOPE *));

/* values for e_errormode -- error handling modes */
#define EM_PRINT        'p'             /* print errors */
#define EM_MAIL         'm'             /* mail back errors */
#define EM_WRITE        'w'             /* write back errors */
#define EM_BERKNET      'e'             /* special berknet processing */
#define EM_QUIET        'q'             /* don't print messages (stat only) */


/* bit values for MimeMode */
#define MM_CVTMIME      0x0001          /* convert 8 to 7 bit MIME */
#define MM_PASS8BIT     0x0002          /* just send 8 bit data blind */
#define MM_MIME8BIT     0x0004          /* convert 8-bit data to MIME */


/* how to handle messages without any recipient addresses */
#define NRA_NO_ACTION           0       /* just leave it as is */
#define NRA_ADD_TO              1       /* add To: header */
#define NRA_ADD_APPARENTLY_TO   2       /* add Apparently-To: header */
#define NRA_ADD_BCC             3       /* add empty Bcc: header */
#define NRA_ADD_TO_UNDISCLOSED  4       /* add To: undisclosed:; header */


/* flags to putxline */
#define PXLF_NOTHINGSPECIAL     0       /* no special mapping */
#define PXLF_MAPFROM            0x0001  /* map From_ to >From_ */
#define PXLF_STRIP8BIT          0x0002  /* strip 8th bit */
#define PXLF_HEADER             0x0004  /* map newlines in headers */
#define PXLF_NOADDEOL           0x0008  /* if EOL not present, don't add one */
#define PXLF_STRIPMQUOTE        0x0010  /* strip METAQUOTEs */

/*
**  Privacy flags
**      These are bit values for the PrivacyFlags word.
*/

#define PRIV_PUBLIC             0               /* what have I got to hide? */
#define PRIV_NEEDMAILHELO       0x00000001      /* insist on HELO for MAIL */
#define PRIV_NEEDEXPNHELO       0x00000002      /* insist on HELO for EXPN */
#define PRIV_NEEDVRFYHELO       0x00000004      /* insist on HELO for VRFY */
#define PRIV_NOEXPN             0x00000008      /* disallow EXPN command */
#define PRIV_NOVRFY             0x00000010      /* disallow VRFY command */
#define PRIV_AUTHWARNINGS       0x00000020      /* flag possible auth probs */
#define PRIV_NOVERB             0x00000040      /* disallow VERB command */
#define PRIV_RESTRICTMAILQ      0x00010000      /* restrict mailq command */
#define PRIV_RESTRICTQRUN       0x00020000      /* restrict queue run */
#define PRIV_RESTRICTEXPAND     0x00040000      /* restrict alias/forward expansion */
#define PRIV_NOETRN             0x00080000      /* disallow ETRN command */
#define PRIV_NOBODYRETN         0x00100000      /* do not return bodies on bounces */
#define PRIV_NORECEIPTS         0x00200000      /* disallow return receipts */
#define PRIV_NOACTUALRECIPIENT  0x00400000 /* no X-Actual-Recipient in DSNs */

/* don't give no info, anyway, anyhow (in the main SMTP transaction) */
#define PRIV_GOAWAY             0x0000ffff

/* struct defining such things */
struct prival
{
        char            *pv_name;       /* name of privacy flag */
        unsigned long   pv_flag;        /* numeric level */
};

EXTERN unsigned long    PrivacyFlags;   /* privacy flags */


/*
**  Flags passed to remotename, parseaddr, allocaddr, and buildaddr.
*/

#define RF_SENDERADDR           0x001   /* this is a sender address */
#define RF_HEADERADDR           0x002   /* this is a header address */
#define RF_CANONICAL            0x004   /* strip comment information */
#define RF_ADDDOMAIN            0x008   /* OK to do domain extension */
#define RF_COPYPARSE            0x010   /* copy parsed user & host */
#define RF_COPYPADDR            0x020   /* copy print address */
#define RF_COPYALL              (RF_COPYPARSE|RF_COPYPADDR)
#define RF_COPYNONE             0
#define RF_RM_ADDR              0x040   /* address to be removed */

/*
**  Flags passed to rscheck
*/

#define RSF_RMCOMM              0x0001  /* strip comments */
#define RSF_UNSTRUCTURED        0x0002  /* unstructured, ignore syntax errors */
#define RSF_COUNT               0x0004  /* count rejections (statistics)? */

/*
**  Flags passed to mime8to7 and putheader.
*/

#define M87F_OUTER              0       /* outer context */
#define M87F_NO8BIT             0x0001  /* can't have 8-bit in this section */
#define M87F_DIGEST             0x0002  /* processing multipart/digest */
#define M87F_NO8TO7             0x0004  /* don't do 8->7 bit conversions */

/* functions */
extern bool     mime7to8 __P((MCI *, HDR *, ENVELOPE *));
extern int      mime8to7 __P((MCI *, HDR *, ENVELOPE *, char **, int, int));

/*
**  Flags passed to returntosender.
*/

#define RTSF_NO_BODY            0       /* send headers only */
#define RTSF_SEND_BODY          0x0001  /* include body of message in return */
#define RTSF_PM_BOUNCE          0x0002  /* this is a postmaster bounce */

/* functions */
extern int      returntosender __P((char *, ADDRESS *, int, ENVELOPE *));

/*
**  Mail Filters (milter)
*/

/*
**  32-bit type used by milter
**  (needed by libmilter even if MILTER isn't defined)
*/

typedef SM_INT32        mi_int32;

#if MILTER
# define SMFTO_WRITE    0               /* Timeout for sending information */
# define SMFTO_READ     1               /* Timeout waiting for a response */
# define SMFTO_EOM      2               /* Timeout for ACK/NAK to EOM */
# define SMFTO_CONNECT  3               /* Timeout for connect() */

# define SMFTO_NUM_TO   4               /* Total number of timeouts */

struct milter
{
        char            *mf_name;       /* filter name */
        BITMAP256       mf_flags;       /* MTA flags */
        mi_int32        mf_fvers;       /* filter version */
        mi_int32        mf_fflags;      /* filter flags */
        mi_int32        mf_pflags;      /* protocol flags */
        char            *mf_conn;       /* connection info */
        int             mf_sock;        /* connected socket */
        char            mf_state;       /* state of filter */
        time_t          mf_timeout[SMFTO_NUM_TO]; /* timeouts */
#if _FFR_MILTER_CHECK
        /* for testing only */
        mi_int32        mf_mta_prot_version;
        mi_int32        mf_mta_prot_flags;
        mi_int32        mf_mta_actions;
#endif /* _FFR_MILTER_CHECK */
};

struct milters
{
        mi_int32        mis_flags;      /* filter flags */
};
typedef struct milters  milters_T;

#define MIS_FL_NONE     0x00000000      /* no requirements... */
#define MIS_FL_DEL_RCPT 0x00000001      /* can delete rcpt */
#define MIS_FL_REJ_RCPT 0x00000002      /* can reject rcpt */


/* MTA flags */
# define SMF_REJECT             'R'     /* Reject connection on filter fail */
# define SMF_TEMPFAIL           'T'     /* tempfail connection on failure */
# define SMF_TEMPDROP           '4'     /* 421 connection on failure */

EXTERN struct milter    *InputFilters[MAXFILTERS];
EXTERN char             *InputFilterList;
EXTERN int              MilterLogLevel;

/* functions */
extern void     setup_daemon_milters __P((void));
#endif /* MILTER */

/*
**  Vendor codes
**
**      Vendors can customize sendmail to add special behaviour,
**      generally for back compatibility.  Ideally, this should
**      be set up in the .cf file using the "V" command.  However,
**      it's quite reasonable for some vendors to want the default
**      be their old version; this can be set using
**              -DVENDOR_DEFAULT=VENDOR_xxx
**      in the Makefile.
**
**      Vendors should apply to sendmail@sendmail.org for
**      unique vendor codes.
*/

#define VENDOR_BERKELEY 1       /* Berkeley-native configuration file */
#define VENDOR_SUN      2       /* Sun-native configuration file */
#define VENDOR_HP       3       /* Hewlett-Packard specific config syntax */
#define VENDOR_IBM      4       /* IBM specific config syntax */
#define VENDOR_SENDMAIL 5       /* Sendmail, Inc. specific config syntax */
#define VENDOR_DEC      6       /* Compaq, DEC, Digital */

/* prototypes for vendor-specific hook routines */
extern void     vendor_daemon_setup __P((ENVELOPE *));
extern void     vendor_set_uid __P((UID_T));


/*
**  Terminal escape codes.
**
**      To make debugging output clearer.
*/

struct termescape
{
        char    *te_rv_on;      /* turn reverse-video on */
        char    *te_under_on;   /* turn underlining on */
        char    *te_normal;     /* revert to normal output */
};

/*
**  Additional definitions
*/

/*
**  d_flags, see daemon.c
**  general rule: lower case: required, upper case: No
*/

#define D_AUTHREQ       'a'     /* authentication required */
#define D_BINDIF        'b'     /* use if_addr for outgoing connection */
#define D_CANONREQ      'c'     /* canonification required (cf) */
#define D_IFNHELO       'h'     /* use if name for HELO */
#define D_FQMAIL        'f'     /* fq sender address required (cf) */
#define D_FQRCPT        'r'     /* fq recipient address required (cf) */
#define D_SMTPS         's'     /* SMTP over SSL (smtps) */
#define D_UNQUALOK      'u'     /* unqualified address is ok (cf) */
#define D_NOAUTH        'A'     /* no AUTH */
#define D_NOCANON       'C'     /* no canonification (cf) */
#define D_NOETRN        'E'     /* no ETRN (MSA) */
#define D_NOTLS         'S'     /* don't use STARTTLS */
#define D_ETRNONLY      ((char)0x01)    /* allow only ETRN (disk low) */
#define D_OPTIONAL      'O'     /* optional socket */
#define D_DISABLE       ((char)0x02)    /* optional socket disabled */
#define D_ISSET         ((char)0x03)    /* this client struct is set */

#if STARTTLS
/*
**  TLS
*/

/* what to do in the TLS initialization */
#define TLS_I_NONE      0x00000000      /* no requirements... */
#define TLS_I_CERT_EX   0x00000001      /* cert must exist */
#define TLS_I_CERT_UNR  0x00000002      /* cert must be g/o unreadable */
#define TLS_I_KEY_EX    0x00000004      /* key must exist */
#define TLS_I_KEY_UNR   0x00000008      /* key must be g/o unreadable */
#define TLS_I_CERTP_EX  0x00000010      /* CA cert path must exist */
#define TLS_I_CERTP_UNR 0x00000020      /* CA cert path must be g/o unreadable */
#define TLS_I_CERTF_EX  0x00000040      /* CA cert file must exist */
#define TLS_I_CERTF_UNR 0x00000080      /* CA cert file must be g/o unreadable */
#define TLS_I_RSA_TMP   0x00000100      /* RSA TMP must be generated */
#define TLS_I_USE_KEY   0x00000200      /* private key must usable */
#define TLS_I_USE_CERT  0x00000400      /* certificate must be usable */
#define TLS_I_VRFY_PATH 0x00000800      /* load verify path must succeed */
#define TLS_I_VRFY_LOC  0x00001000      /* load verify default must succeed */
#define TLS_I_CACHE     0x00002000      /* require cache */
#define TLS_I_TRY_DH    0x00004000      /* try DH certificate */
#define TLS_I_REQ_DH    0x00008000      /* require DH certificate */
#define TLS_I_DHPAR_EX  0x00010000      /* require DH parameters */
#define TLS_I_DHPAR_UNR 0x00020000      /* DH param. must be g/o unreadable */
#define TLS_I_DH512     0x00040000      /* generate 512bit DH param */
#define TLS_I_DH1024    0x00080000      /* generate 1024bit DH param */
#define TLS_I_DH2048    0x00100000      /* generate 2048bit DH param */
#define TLS_I_NO_VRFY   0x00200000      /* do not require authentication */
#define TLS_I_KEY_OUNR  0x00400000      /* Key must be other unreadable */
#define TLS_I_CRLF_EX   0x00800000      /* CRL file must exist */
#define TLS_I_CRLF_UNR  0x01000000      /* CRL file must be g/o unreadable */

/* require server cert */
#define TLS_I_SRV_CERT   (TLS_I_CERT_EX | TLS_I_KEY_EX | \
                          TLS_I_KEY_UNR | TLS_I_KEY_OUNR | \
                          TLS_I_CERTP_EX | TLS_I_CERTF_EX | \
                          TLS_I_USE_KEY | TLS_I_USE_CERT | TLS_I_CACHE)

/* server requirements */
#define TLS_I_SRV       (TLS_I_SRV_CERT | TLS_I_RSA_TMP | TLS_I_VRFY_PATH | \
                         TLS_I_VRFY_LOC | TLS_I_TRY_DH | TLS_I_DH512 | \
                         TLS_I_CACHE)

/* client requirements */
#define TLS_I_CLT       (TLS_I_KEY_UNR | TLS_I_KEY_OUNR)

#define TLS_AUTH_OK     0
#define TLS_AUTH_NO     1
#define TLS_AUTH_FAIL   (-1)

/* functions */
extern bool     init_tls_library __P((void));
extern bool     inittls __P((SSL_CTX **, unsigned long, long, bool, char *, char *, char *, char *, char *));
extern bool     initclttls __P((bool));
extern void     setclttls __P((bool));
extern bool     initsrvtls __P((bool));
extern int      tls_get_info __P((SSL *, bool, char *, MACROS_T *, bool));
extern int      endtls __P((SSL *, char *));
extern void     tlslogerr __P((const char *));


EXTERN char     *CACertPath;    /* path to CA certificates (dir. with hashes) */
EXTERN char     *CACertFile;    /* file with CA certificate */
EXTERN char     *CltCertFile;   /* file with client certificate */
EXTERN char     *CltKeyFile;    /* file with client private key */
# if _FFR_TLS_1
EXTERN char     *CipherList;    /* list of ciphers */
EXTERN char     *DHParams5;     /* file with DH parameters (512) */
# endif /* _FFR_TLS_1 */
EXTERN char     *DHParams;      /* file with DH parameters */
EXTERN char     *RandFile;      /* source of random data */
EXTERN char     *SrvCertFile;   /* file with server certificate */
EXTERN char     *SrvKeyFile;    /* file with server private key */
EXTERN char     *CRLFile;       /* file CRLs */
#if _FFR_CRLPATH
EXTERN char     *CRLPath;       /* path to CRLs (dir. with hashes) */
#endif /* _FFR_CRLPATH */
EXTERN unsigned long    TLS_Srv_Opts;   /* TLS server options */
EXTERN long     Srv_SSL_Options, Clt_SSL_Options; /* SSL options */
#endif /* STARTTLS */

/*
**  Queue related items
*/

/* queue file names */
#define ANYQFL_LETTER '?'
#define QUARQF_LETTER 'h'
#define DATAFL_LETTER 'd'
#define XSCRPT_LETTER 'x'
#define NORMQF_LETTER 'q'
#define NEWQFL_LETTER 't'

# define TEMPQF_LETTER 'T'
# define LOSEQF_LETTER 'Q'

/* queue sort order */
#define QSO_BYPRIORITY  0               /* sort by message priority */
#define QSO_BYHOST      1               /* sort by first host name */
#define QSO_BYTIME      2               /* sort by submission time */
#define QSO_BYFILENAME  3               /* sort by file name only */
#define QSO_RANDOM      4               /* sort in random order */
#define QSO_BYMODTIME   5               /* sort by modification time */
#define QSO_NONE        6               /* do not sort */
#if _FFR_RHS
# define QSO_BYSHUFFLE  7               /* sort by shuffled host name */
#endif /* _FFR_RHS */

#define NOQGRP  (-1)            /* no queue group (yet) */
#define ENVQGRP (-2)            /* use queue group of envelope */
#define NOAQGRP (-3)            /* no queue group in addr (yet) */
#define ISVALIDQGRP(x)  ((x) >= 0)      /* valid queue group? */
#define NOQDIR  (-1)            /* no queue directory (yet) */
#define ENVQDIR (-2)            /* use queue directory of envelope */
#define NOAQDIR (-3)            /* no queue directory in addr (yet) */
#define ISVALIDQDIR(x)  ((x) >= 0)      /* valid queue directory? */
#define RS_QUEUEGROUP   "queuegroup"    /* ruleset for queue group selection */

#define NOW     ((time_t) (-1))         /* queue return: now */

/* SuperSafe values */
#define SAFE_NO                 0       /* no fsync(): don't use... */
#define SAFE_INTERACTIVE        1       /* limit fsync() in -odi */
#define SAFE_REALLY             2       /* always fsync() */
#define SAFE_REALLY_POSTMILTER  3       /* fsync() if milter says OK */

/* QueueMode bits */
#define QM_NORMAL               ' '
#define QM_QUARANTINE           'Q'
#define QM_LOST                 'L'

/* Queue Run Limitations */
struct queue_char
{
        char                    *queue_match;   /* string to match */
        bool                    queue_negate;   /* or not match, if set */
        struct queue_char       *queue_next;
};

/* run_work_group() flags */
#define RWG_NONE                0x0000
#define RWG_FORK                0x0001
#define RWG_VERBOSE             0x0002
#define RWG_PERSISTENT          0x0004
#define RWG_FORCE               0x0008
#define RWG_RUNALL              0x0010

typedef struct queue_char       QUEUE_CHAR;

EXTERN int      volatile CurRunners;    /* current number of runner children */
EXTERN int      MaxQueueRun;    /* maximum number of jobs in one queue run */
EXTERN int      MaxQueueChildren;       /* max # of forked queue children */
EXTERN int      MaxRunnersPerQueue;     /* max # proc's active in queue group */
EXTERN int      NiceQueueRun;   /* nice queue runs to this value */
EXTERN int      NumQueue;       /* number of queue groups */
EXTERN int      QueueFileMode;  /* mode on files in mail queue */
EXTERN int      QueueMode;      /* which queue items to act upon */
EXTERN int      QueueSortOrder; /* queue sorting order algorithm */
EXTERN time_t   MinQueueAge;    /* min delivery interval */
#if _FFR_EXPDELAY
EXTERN time_t   MaxQueueAge;    /* max delivery interval */
#endif /* _FFR_EXPDELAY */
EXTERN time_t   QueueIntvl;     /* intervals between running the queue */
EXTERN char     *QueueDir;      /* location of queue directory */
EXTERN QUEUE_CHAR       *QueueLimitId;          /* limit queue run to id */
EXTERN QUEUE_CHAR       *QueueLimitQuarantine;  /* limit queue run to quarantine reason */
EXTERN QUEUE_CHAR       *QueueLimitRecipient;   /* limit queue run to rcpt */
EXTERN QUEUE_CHAR       *QueueLimitSender;      /* limit queue run to sender */
EXTERN QUEUEGRP *Queue[MAXQUEUEGROUPS + 1];     /* queue groups */

/* functions */
extern void     assign_queueid __P((ENVELOPE *));
extern ADDRESS  *copyqueue __P((ADDRESS *, SM_RPOOL_T *));
extern void     cleanup_queues __P((void));
extern bool     doqueuerun __P((void));
extern void     initsys __P((ENVELOPE *));
extern void     loseqfile __P((ENVELOPE *, char *));
extern int      name2qid __P((char *));
extern char     *qid_printname __P((ENVELOPE *));
extern char     *qid_printqueue __P((int, int));
extern void     quarantine_queue __P((char *, int));
extern char     *queuename __P((ENVELOPE *, int));
extern void     queueup __P((ENVELOPE *, bool, bool));
extern bool     runqueue __P((bool, bool, bool, bool));
extern bool     run_work_group __P((int, int));
extern void     set_def_queueval __P((QUEUEGRP *, bool));
extern void     setup_queues __P((bool));
extern bool     setnewqueue __P((ENVELOPE *));
extern bool     shouldqueue __P((long, time_t));
extern void     sync_queue_time __P((void));
extern void     init_qid_alg __P((void));
extern int      print_single_queue __P((int, int));
#if REQUIRES_DIR_FSYNC
# define SYNC_DIR(path, panic) sync_dir(path, panic)
extern void     sync_dir __P((char *, bool));
#else /* REQUIRES_DIR_FSYNC */
# define SYNC_DIR(path, panic) ((void) 0)
#endif /* REQUIRES_DIR_FSYNC */

/*
**  Timeouts
**
**      Indicated values are the MINIMUM per RFC 1123 section 5.3.2.
*/

EXTERN struct
{
                        /* RFC 1123-specified timeouts [minimum value] */
        time_t  to_initial;     /* initial greeting timeout [5m] */
        time_t  to_mail;        /* MAIL command [5m] */
        time_t  to_rcpt;        /* RCPT command [5m] */
        time_t  to_datainit;    /* DATA initiation [2m] */
        time_t  to_datablock;   /* DATA block [3m] */
        time_t  to_datafinal;   /* DATA completion [10m] */
        time_t  to_nextcommand; /* next command [5m] */
                        /* following timeouts are not mentioned in RFC 1123 */
        time_t  to_iconnect;    /* initial connection timeout (first try) */
        time_t  to_connect;     /* initial connection timeout (later tries) */
        time_t  to_aconnect;    /* all connections timeout (MX and A records) */
        time_t  to_rset;        /* RSET command */
        time_t  to_helo;        /* HELO command */
        time_t  to_quit;        /* QUIT command */
        time_t  to_miscshort;   /* misc short commands (NOOP, VERB, etc) */
        time_t  to_ident;       /* IDENT protocol requests */
        time_t  to_fileopen;    /* opening :include: and .forward files */
        time_t  to_control;     /* process a control socket command */
        time_t  to_lhlo;        /* LMTP: LHLO command */
#if SASL
        time_t  to_auth;        /* AUTH dialogue [10m] */
#endif /* SASL */
#if STARTTLS
        time_t  to_starttls;    /* STARTTLS dialogue [10m] */
#endif /* STARTTLS */
                        /* following are per message */
        time_t  to_q_return[MAXTOCLASS];        /* queue return timeouts */
        time_t  to_q_warning[MAXTOCLASS];       /* queue warning timeouts */
        time_t  res_retrans[MAXRESTOTYPES];     /* resolver retransmit */
        int     res_retry[MAXRESTOTYPES];       /* resolver retry */
} TimeOuts;

/* timeout classes for return and warning timeouts */
#define TOC_NORMAL      0       /* normal delivery */
#define TOC_URGENT      1       /* urgent delivery */
#define TOC_NONURGENT   2       /* non-urgent delivery */
#define TOC_DSN         3       /* DSN delivery */

/* resolver timeout specifiers */
#define RES_TO_FIRST    0       /* first attempt */
#define RES_TO_NORMAL   1       /* subsequent attempts */
#define RES_TO_DEFAULT  2       /* default value */

/* functions */
extern void     inittimeouts __P((char *, bool));

/*
**  Interface probing
*/

#define DPI_PROBENONE           0       /* Don't probe any interfaces */
#define DPI_PROBEALL            1       /* Probe all interfaces */
#define DPI_SKIPLOOPBACK        2       /* Don't probe loopback interfaces */

/*
**  Trace information
*/

/* macros for debugging flags */
#define tTd(flag, level)        (tTdvect[flag] >= (unsigned char)level)
#define tTdlevel(flag)          (tTdvect[flag])

/* variables */
extern unsigned char    tTdvect[100];   /* trace vector */

/*
**  Miscellaneous information.
*/

/*
**  The "no queue id" queue id for sm_syslog
*/

#define NOQID           ""

#define CURHOSTNAME     (CurHostName == NULL ? "local" : CurHostName)

/*
**  Some in-line functions
*/

/* set exit status */
#define setstat(s)      { \
                                if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \
                                        ExitStat = s; \
                        }


#define STRUCTCOPY(s, d)        d = s

/* free a pointer if it isn't NULL and set it to NULL */
#define SM_FREE_CLR(p)  \
                        if ((p) != NULL) \
                        { \
                                sm_free(p); \
                                (p) = NULL; \
                        } \
                        else

/*
**  Update a permanent string variable with a new value.
**  The old value is freed, the new value is strdup'ed.
**
**  We use sm_pstrdup_x to duplicate the string because it raises
**  an exception on error, and because it allocates "permanent storage"
**  which is not expected to be freed before process exit.
**  The latter is important for memory leak analysis.
**
**  If an exception occurs while strdup'ing the new value,
**  then the variable remains set to the old value.
**  That's why the strdup must occur before we free the old value.
**
**  The macro uses a do loop so that this idiom will work:
**      if (...)
**              PSTRSET(var, val1);
**      else
**              PSTRSET(var, val2);
*/
#define PSTRSET(var, val) \
        do \
        { \
                char *_newval = sm_pstrdup_x(val); \
                if (var != NULL) \
                        sm_free(var); \
                var = _newval; \
        } while (0)

#define _CHECK_RESTART \
        do \
        { \
                if (ShutdownRequest != NULL) \
                        shutdown_daemon(); \
                else if (RestartRequest != NULL) \
                        restart_daemon(); \
                else if (RestartWorkGroup) \
                        restart_marked_work_groups(); \
        } while (0)

# define CHECK_RESTART _CHECK_RESTART

/* reply types (text in SmtpMsgBuffer) */
#define XS_DEFAULT      0
#define XS_STARTTLS     1
#define XS_AUTH         2

/*
**  Global variables.
*/

#if _FFR_ADDR_TYPE_MODES
EXTERN bool     AddrTypeModes;  /* addr_type: extra "mode" information */
#endif /* _FFR_ADDR_TYPE_MODES */
EXTERN bool     AllowBogusHELO; /* allow syntax errors on HELO command */
EXTERN bool     CheckAliases;   /* parse addresses during newaliases */
#if _FFR_QUEUE_RUN_PARANOIA
EXTERN int      CheckQueueRunners; /* check whether queue runners are OK */
#endif /* _FFR_QUEUE_RUN_PARANOIA */
EXTERN bool     ColonOkInAddr;  /* single colon legal in address */
#if !defined(_USE_SUN_NSSWITCH_) && !defined(_USE_DEC_SVC_CONF_)
EXTERN bool     ConfigFileRead; /* configuration file has been read */
#endif /* !defined(_USE_SUN_NSSWITCH_) && !defined(_USE_DEC_SVC_CONF_) */
EXTERN bool     DisConnected;   /* running with OutChannel redirect to transcript file */
EXTERN bool     DontExpandCnames;       /* do not $[...$] expand CNAMEs */
EXTERN bool     DontInitGroups; /* avoid initgroups() because of NIS cost */
EXTERN bool     DontLockReadFiles;      /* don't read lock support files */
EXTERN bool     DontPruneRoutes;        /* don't prune source routes */
EXTERN bool     ForkQueueRuns;  /* fork for each job when running the queue */
EXTERN bool     FromFlag;       /* if set, "From" person is explicit */
EXTERN bool     GrabTo;         /* if set, get recipients from msg */
EXTERN bool     EightBitAddrOK; /* we'll let 8-bit addresses through */
EXTERN bool     HasEightBits;   /* has at least one eight bit input byte */
EXTERN bool     HasWildcardMX;  /* don't use MX records when canonifying */
EXTERN bool     HoldErrs;       /* only output errors to transcript */
EXTERN bool     IgnoreHostStatus;       /* ignore long term host status files */
EXTERN bool     IgnrDot;        /* don't let dot end messages */
EXTERN bool     LogUsrErrs;     /* syslog user errors (e.g., SMTP RCPT cmd) */
EXTERN bool     MatchGecos;     /* look for user names in gecos field */
EXTERN bool     MeToo;          /* send to the sender also */
EXTERN bool     NoAlias;        /* suppress aliasing */
EXTERN bool     NoConnect;      /* don't connect to non-local mailers */
EXTERN bool     OnlyOneError;   /*  .... or only want to give one SMTP reply */
EXTERN bool     QuickAbort;     /*  .... but only if we want a quick abort */
#if REQUIRES_DIR_FSYNC
EXTERN bool     RequiresDirfsync;       /* requires fsync() for directory */
#endif /* REQUIRES_DIR_FSYNC */
EXTERN bool     volatile RestartWorkGroup; /* daemon needs to restart some work groups */
EXTERN bool     RrtImpliesDsn;  /* turn Return-Receipt-To: into DSN */
EXTERN bool     SaveFrom;       /* save leading "From" lines */
EXTERN bool     SendMIMEErrors; /* send error messages in MIME format */
EXTERN bool     SevenBitInput;  /* force 7-bit data on input */
EXTERN bool     SingleLineFromHeader;   /* force From: header to be one line */
EXTERN bool     SingleThreadDelivery;   /* single thread hosts on delivery */
EXTERN bool     SoftBounce;     /* replace 5xy by 4xy (for testing) */
EXTERN bool     volatile StopRequest;   /* stop sending output */
EXTERN bool     SuprErrs;       /* set if we are suppressing errors */
EXTERN bool     TryNullMXList;  /* if we are the best MX, try host directly */
EXTERN bool     UseMSP;         /* mail submission: group writable queue ok? */
EXTERN bool     WorkAroundBrokenAAAA;   /* some nameservers return SERVFAIL on AAAA queries */
EXTERN bool     UseErrorsTo;    /* use Errors-To: header (back compat) */
EXTERN bool     UseNameServer;  /* using DNS -- interpret h_errno & MX RRs */
EXTERN char     InetMode;               /* default network for daemon mode */
EXTERN char     OpMode;         /* operation mode, see below */
EXTERN char     SpaceSub;       /* substitution for <lwsp> */
#if _FFR_BADRCPT_SHUTDOWN
EXTERN int      BadRcptShutdown; /* Shutdown connection for rejected RCPTs */
EXTERN int      BadRcptShutdownGood; /* above even when there are good RCPTs */
#endif /* _FFR_BADRCPT_SHUTDOWN */
EXTERN int      BadRcptThrottle; /* Throttle rejected RCPTs per SMTP message */
#if _FFR_RCPTTHROTDELAY
EXTERN unsigned int BadRcptThrottleDelay; /* delay for BadRcptThrottle */
#else
# define BadRcptThrottleDelay   1
#endif /* _FFR_RCPTTHROTDELAY */
EXTERN int      CheckpointInterval;     /* queue file checkpoint interval */
EXTERN int      ConfigLevel;    /* config file level */
EXTERN int      ConnRateThrottle;       /* throttle for SMTP connection rate */
EXTERN int      volatile CurChildren;   /* current number of daemonic children */
EXTERN int      CurrentLA;      /* current load average */
EXTERN int      DefaultNotify;  /* default DSN notification flags */
EXTERN int      DelayLA;        /* load average to delay connections */
EXTERN int      DontProbeInterfaces;    /* don't probe interfaces for names */
EXTERN int      Errors;         /* set if errors (local to single pass) */
EXTERN int      ExitStat;       /* exit status code */
EXTERN int      FastSplit;      /* fast initial splitting of envelopes */
EXTERN int      FileMode;       /* mode on files */
EXTERN int      LineNumber;     /* line number in current input */
EXTERN int      LogLevel;       /* level of logging to perform */
EXTERN int      MaxAliasRecursion;      /* maximum depth of alias recursion */
EXTERN int      MaxChildren;    /* maximum number of daemonic children */
EXTERN int      MaxForwardEntries;      /* maximum number of forward entries */
EXTERN int      MaxHeadersLength;       /* max length of headers */
EXTERN int      MaxHopCount;    /* max # of hops until bounce */
EXTERN int      MaxMacroRecursion;      /* maximum depth of macro recursion */
EXTERN int      MaxMimeFieldLength;     /* maximum MIME field length */
EXTERN int      MaxMimeHeaderLength;    /* maximum MIME header length */
EXTERN int      MaxNOOPCommands; /* max "noise" commands before slowdown */

EXTERN int      MaxRcptPerMsg;  /* max recipients per SMTP message */
EXTERN int      MaxRuleRecursion;       /* maximum depth of ruleset recursion */
#if _FFR_MSG_ACCEPT
EXTERN char     *MessageAccept; /* "Message accepted for delivery" reply text */
#endif /* _FFR_MSG_ACCEPT */

EXTERN int      MimeMode;       /* MIME processing mode */
EXTERN int      NoRecipientAction;

#if SM_CONF_SHM
EXTERN int      Numfilesys;     /* number of queue file systems */
EXTERN int      *PNumFileSys;
# define NumFileSys     (*PNumFileSys)
# else /* SM_CONF_SHM */
EXTERN int      NumFileSys;     /* number of queue file systems */
# endif /* SM_CONF_SHM */

EXTERN int      QueueLA;        /* load average starting forced queueing */
EXTERN int      RefuseLA;       /* load average refusing connections */
EXTERN time_t   RejectLogInterval;      /* time btwn log msgs while refusing */
#if _FFR_MEMSTAT
EXTERN long     QueueLowMem;    /* low memory starting forced queueing */
EXTERN long     RefuseLowMem;   /* low memory refusing connections */
EXTERN char     *MemoryResource;/* memory resource to look up */
#endif /* _FFR_MEMSTAT */
EXTERN int      SuperSafe;      /* be extra careful, even if expensive */
EXTERN int      VendorCode;     /* vendor-specific operation enhancements */
EXTERN int      Verbose;        /* set if blow-by-blow desired */
EXTERN gid_t    DefGid;         /* default gid to run as */
EXTERN gid_t    RealGid;        /* real gid of caller */
EXTERN gid_t    RunAsGid;       /* GID to become for bulk of run */
EXTERN gid_t    EffGid;         /* effective gid */
#if SM_CONF_SHM
EXTERN key_t    ShmKey;         /* shared memory key */
EXTERN char     *ShmKeyFile;    /* shared memory key file */
#endif /* SM_CONF_SHM */
EXTERN pid_t    CurrentPid;     /* current process id */
EXTERN pid_t    DaemonPid;      /* process id of daemon */
EXTERN pid_t    PidFilePid;     /* daemon/queue runner who wrote pid file */
EXTERN uid_t    DefUid;         /* default uid to run as */
EXTERN uid_t    RealUid;        /* real uid of caller */
EXTERN uid_t    RunAsUid;       /* UID to become for bulk of run */
EXTERN uid_t    TrustedUid;     /* uid of trusted user for files and startup */
EXTERN size_t   DataFileBufferSize;     /* size of buf for in-core data file */
EXTERN time_t   DeliverByMin;   /* deliver by minimum time */
EXTERN time_t   DialDelay;      /* delay between dial-on-demand tries */
EXTERN time_t   SafeAlias;      /* interval to wait until @:@ in alias file */
EXTERN time_t   ServiceCacheMaxAge;     /* refresh interval for cache */
EXTERN size_t   XscriptFileBufferSize;  /* size of buf for in-core transcript file */
EXTERN MODE_T   OldUmask;       /* umask when sendmail starts up */
EXTERN long     MaxMessageSize; /* advertised max size we will accept */
EXTERN long     MinBlocksFree;  /* min # of blocks free on queue fs */
EXTERN long     QueueFactor;    /* slope of queue function */
EXTERN long     WkClassFact;    /* multiplier for message class -> priority */
EXTERN long     WkRecipFact;    /* multiplier for # of recipients -> priority */
EXTERN long     WkTimeFact;     /* priority offset each time this job is run */
EXTERN char     *ControlSocketName; /* control socket filename [control.c] */
EXTERN char     *CurHostName;   /* current host we are dealing with */
EXTERN char     *DeadLetterDrop;        /* path to dead letter office */
EXTERN char     *DefUser;       /* default user to run as (from DefUid) */
EXTERN char     *DefaultCharSet;        /* default character set for MIME */
EXTERN char     *DoubleBounceAddr;      /* where to send double bounces */
EXTERN char     *ErrMsgFile;    /* file to prepend to all error messages */
EXTERN char     *FallbackMX;    /* fall back MX host */
EXTERN char     *FallbackSmartHost;     /* fall back smart host */
EXTERN char     *FileName;      /* name to print on error messages */
EXTERN char     *ForwardPath;   /* path to search for .forward files */
EXTERN char     *HeloName;      /* hostname to announce in HELO */
EXTERN char     *HelpFile;      /* location of SMTP help file */
EXTERN char     *HostStatDir;   /* location of host status information */
EXTERN char     *HostsFile;     /* path to /etc/hosts file */
extern char     *Mbdb;          /* mailbox database type */
EXTERN char     *MustQuoteChars;        /* quote these characters in phrases */
EXTERN char     *MyHostName;    /* name of this host for SMTP messages */
EXTERN char     *OperatorChars; /* operators (old $o macro) */
EXTERN char     *PidFile;       /* location of proc id file [conf.c] */
EXTERN char     *PostMasterCopy;        /* address to get errs cc's */
EXTERN char     *ProcTitlePrefix; /* process title prefix */
EXTERN char     *RealHostName;  /* name of host we are talking to */
EXTERN char     *RealUserName;  /* real user name of caller */
EXTERN char     *volatile RestartRequest;/* a sendmail restart has been requested */
EXTERN char     *RunAsUserName; /* user to become for bulk of run */
EXTERN char     *SafeFileEnv;   /* chroot location for file delivery */
EXTERN char     *ServiceSwitchFile;     /* backup service switch */
EXTERN char     *volatile ShutdownRequest;/* a sendmail shutdown has been requested */
EXTERN char     *SmtpGreeting;  /* SMTP greeting message (old $e macro) */
EXTERN char     *SmtpPhase;     /* current phase in SMTP processing */
EXTERN char     SmtpError[MAXLINE];     /* save failure error messages */
EXTERN char     *StatFile;      /* location of statistics summary */
EXTERN char     *TimeZoneSpec;  /* override time zone specification */
EXTERN char     *UdbSpec;       /* user database source spec */
EXTERN char     *UnixFromLine;  /* UNIX From_ line (old $l macro) */
EXTERN char     **ExternalEnviron;      /* saved user (input) environment */
EXTERN char     **SaveArgv;     /* argument vector for re-execing */
EXTERN BITMAP256        DontBlameSendmail;      /* DontBlameSendmail bits */
EXTERN SM_FILE_T        *InChannel;     /* input connection */
EXTERN SM_FILE_T        *OutChannel;    /* output connection */
EXTERN SM_FILE_T        *TrafficLogFile; /* file in which to log all traffic */
#if HESIOD
EXTERN void     *HesiodContext;
#endif /* HESIOD */
EXTERN ENVELOPE *CurEnv;        /* envelope currently being processed */
EXTERN char     *RuleSetNames[MAXRWSETS];       /* ruleset number to name */
EXTERN char     *UserEnviron[MAXUSERENVIRON + 1];
EXTERN struct rewrite   *RewriteRules[MAXRWSETS];
EXTERN struct termescape        TermEscape;     /* terminal escape codes */
EXTERN SOCKADDR ConnectOnlyTo;  /* override connection address (for testing) */
EXTERN SOCKADDR RealHostAddr;   /* address of host we are talking to */
extern const SM_EXC_TYPE_T EtypeQuickAbort; /* type of a QuickAbort exception */


EXTERN int ConnectionRateWindowSize;

/*
**  Declarations of useful functions
*/

/* Transcript file */
extern void     closexscript __P((ENVELOPE *));
extern void     openxscript __P((ENVELOPE *));

/* error related */
extern void     buffer_errors __P((void));
extern void     flush_errors __P((bool));
extern void PRINTFLIKE(1, 2)    message __P((const char *, ...));
extern void PRINTFLIKE(1, 2)    nmessage __P((const char *, ...));
extern void PRINTFLIKE(1, 2)    syserr __P((const char *, ...));
extern void PRINTFLIKE(2, 3)    usrerrenh __P((char *, const char *, ...));
extern void PRINTFLIKE(1, 2)    usrerr __P((const char *, ...));
extern int      isenhsc __P((const char *, int));
extern int      extenhsc __P((const char *, int, char *));

/* alias file */
extern void     alias __P((ADDRESS *, ADDRESS **, int, ENVELOPE *));
extern bool     aliaswait __P((MAP *, char *, bool));
extern void     forward __P((ADDRESS *, ADDRESS **, int, ENVELOPE *));
extern void     readaliases __P((MAP *, SM_FILE_T *, bool, bool));
extern bool     rebuildaliases __P((MAP *, bool));
extern void     setalias __P((char *));

/* logging */
extern void     logdelivery __P((MAILER *, MCI *, char *, const char *, ADDRESS *, time_t, ENVELOPE *));
extern void     logsender __P((ENVELOPE *, char *));
extern void PRINTFLIKE(3, 4) sm_syslog __P((int, const char *, const char *, ...));

/* SMTP */
extern void     giveresponse __P((int, char *, MAILER *, MCI *, ADDRESS *, time_t, ENVELOPE *, ADDRESS *));
extern int      reply __P((MAILER *, MCI *, ENVELOPE *, time_t, void (*)__P((char *, bool, MAILER *, MCI *, ENVELOPE *)), char **, int));
extern void     smtp __P((char *volatile, BITMAP256, ENVELOPE *volatile));
#if SASL
extern int      smtpauth __P((MAILER *, MCI *, ENVELOPE *));
#endif /* SASL */
extern int      smtpdata __P((MAILER *, MCI *, ENVELOPE *, ADDRESS *, time_t));
extern int      smtpgetstat __P((MAILER *, MCI *, ENVELOPE *));
extern int      smtpmailfrom __P((MAILER *, MCI *, ENVELOPE *));
extern void     smtpmessage __P((char *, MAILER *, MCI *, ...));
extern void     smtpinit __P((MAILER *, MCI *, ENVELOPE *, bool));
extern char     *smtptodsn __P((int));
extern int      smtpprobe __P((MCI *));
extern void     smtpquit __P((MAILER *, MCI *, ENVELOPE *));
extern int      smtprcpt __P((ADDRESS *, MAILER *, MCI *, ENVELOPE *, ADDRESS *, time_t));
extern void     smtprset __P((MAILER *, MCI *, ENVELOPE *));

#define REPLYTYPE(r)    ((r) / 100)             /* first digit of reply code */
#define ISSMTPCODE(c)   (isascii(c[0]) && isdigit(c[0]) && \
                    isascii(c[1]) && isdigit(c[1]) && \
                    isascii(c[2]) && isdigit(c[2]))
#define ISSMTPREPLY(c)  (ISSMTPCODE(c) && \
                    (c[3] == ' ' || c[3] == '-' || c[3] == '\0'))

/* delivery */
extern pid_t    dowork __P((int, int, char *, bool, bool, ENVELOPE *));
extern pid_t    doworklist __P((ENVELOPE *, bool, bool));
extern int      endmailer __P((MCI *, ENVELOPE *, char **));
extern int      mailfile __P((char *volatile, MAILER *volatile, ADDRESS *, volatile long, ENVELOPE *));
extern void     sendall __P((ENVELOPE *, int));

/* stats */
#define STATS_NORMAL            'n'
#define STATS_QUARANTINE        'q'
#define STATS_REJECT            'r'
#define STATS_CONNECT           'c'

extern void     markstats __P((ENVELOPE *, ADDRESS *, int));
extern void     clearstats __P((void));
extern void     poststats __P((char *));

/* control socket */
extern void     closecontrolsocket  __P((bool));
extern void     clrcontrol  __P((void));
extern void     control_command __P((int, ENVELOPE *));
extern int      opencontrolsocket __P((void));

#if MILTER
/* milter functions */
extern void     milter_config __P((char *, struct milter **, int));
extern void     milter_setup __P((char *));
extern void     milter_set_option __P((char *, char *, bool));
extern bool     milter_init __P((ENVELOPE *, char *, milters_T *));
extern void     milter_quit __P((ENVELOPE *));
extern void     milter_abort __P((ENVELOPE *));
extern char     *milter_connect __P((char *, SOCKADDR, ENVELOPE *, char *));
extern char     *milter_helo __P((char *, ENVELOPE *, char *));
extern char     *milter_envfrom __P((char **, ENVELOPE *, char *));
extern char     *milter_data_cmd __P((ENVELOPE *, char *));
extern char     *milter_envrcpt __P((char **, ENVELOPE *, char *, bool));
extern char     *milter_data __P((ENVELOPE *, char *));
extern char     *milter_unknown __P((char *, ENVELOPE *, char *));
#endif /* MILTER */

extern char     *addquotes __P((char *, SM_RPOOL_T *));
extern char     *arpadate __P((char *));
extern bool     atobool __P((char *));
extern int      atooct __P((char *));
extern void     auth_warning __P((ENVELOPE *, const char *, ...));
extern int      blocksignal __P((int));
extern bool     bitintersect __P((BITMAP256, BITMAP256));
extern bool     bitzerop __P((BITMAP256));
extern int      check_bodytype __P((char *));
extern void     buildfname __P((char *, char *, char *, int));
extern bool     chkclientmodifiers __P((int));
extern bool     chkdaemonmodifiers __P((int));
extern int      checkcompat __P((ADDRESS *, ENVELOPE *));
#ifdef XDEBUG
extern void     checkfd012 __P((char *));
extern void     checkfdopen __P((int, char *));
#endif /* XDEBUG */
extern void     checkfds __P((char *));
extern bool     chownsafe __P((int, bool));
extern void     cleanstrcpy __P((char *, char *, int));
#if SM_CONF_SHM
extern void     cleanup_shm __P((bool));
#endif /* SM_CONF_SHM */
extern void     close_sendmail_pid __P((void));
extern void     clrdaemon __P((void));
extern void     collect __P((SM_FILE_T *, bool, HDR **, ENVELOPE *, bool));
extern bool     connection_rate_check __P((SOCKADDR *, ENVELOPE *));
extern time_t   convtime __P((char *, int));
extern char     **copyplist __P((char **, bool, SM_RPOOL_T *));
extern void     copy_class __P((int, int));
extern int      count_open_connections __P((SOCKADDR *));
extern time_t   curtime __P((void));
extern char     *defcharset __P((ENVELOPE *));
extern char     *denlstring __P((char *, bool, bool));
extern void     dferror __P((SM_FILE_T *volatile, char *, ENVELOPE *));
extern void     disconnect __P((int, ENVELOPE *));
extern void     disk_status __P((SM_FILE_T *, char *));
extern bool     dns_getcanonname __P((char *, int, bool, int *, int *));
extern pid_t    dofork __P((void));
extern int      drop_privileges __P((bool));
extern int      dsntoexitstat __P((char *));
extern void     dumpfd __P((int, bool, bool));
#if SM_HEAP_CHECK
extern void     dumpstab __P((void));
#endif /* SM_HEAP_CHECK */
extern void     dumpstate __P((char *));
extern bool     enoughdiskspace __P((long, ENVELOPE *));
extern char     *exitstat __P((char *));
extern void     fatal_error __P((SM_EXC_T *));
extern char     *fgetfolded __P((char *, int *, SM_FILE_T *));
extern void     fill_fd __P((int, char *));
extern char     *find_character __P((char *, int));
extern int      finduser __P((char *, bool *, SM_MBDB_T *));
extern void     finis __P((bool, bool, volatile int));
extern void     fixcrlf __P((char *, bool));
extern long     freediskspace __P((const char *, long *));
#if NETINET6 && NEEDSGETIPNODE
extern void     freehostent __P((struct hostent *));
#endif /* NETINET6 && NEEDSGETIPNODE */
extern char     *get_column __P((char *, int, int, char *, int));
extern char     *getauthinfo __P((int, bool *));
extern int      getdtsize __P((void));
extern int      getla __P((void));
extern char     *getmodifiers __P((char *, BITMAP256));
extern BITMAP256        *getrequests __P((ENVELOPE *));
extern char     *getvendor __P((int));
extern void     help __P((char *, ENVELOPE *));
extern void     init_md __P((int, char **));
extern void     initdaemon __P((void));
extern void     inithostmaps __P((void));
extern void     initmacros __P((ENVELOPE *));
extern void     initsetproctitle __P((int, char **, char **));
extern void     init_vendor_macros __P((ENVELOPE *));
extern SIGFUNC_DECL     intsig __P((int));
extern bool     isloopback __P((SOCKADDR sa));
extern void     load_if_names __P((void));
extern bool     lockfile __P((int, char *, char *, int));
extern void     log_sendmail_pid __P((ENVELOPE *));
extern void     logundelrcpts __P((ENVELOPE *, char *, int, bool));
extern char     lower __P((int));
extern void     makelower __P((char *));
extern int      makeconnection_ds __P((char *, MCI *));
extern int      makeconnection __P((char *, volatile unsigned int, MCI *, ENVELOPE *, time_t));
extern void     makeworkgroups __P((void));
extern void     markfailure __P((ENVELOPE *, ADDRESS *, MCI *, int, bool));
extern void     mark_work_group_restart __P((int, int));
extern MCI      *mci_new __P((SM_RPOOL_T *));
extern char     *munchstring __P((char *, char **, int));
extern struct hostent   *myhostname __P((char *, int));
extern char     *newstr __P((const char *));
#if NISPLUS
extern char     *nisplus_default_domain __P((void));    /* extern for Sun */
#endif /* NISPLUS */
extern bool     path_is_dir __P((char *, bool));
extern int      pickqdir __P((QUEUEGRP *qg, long fsize, ENVELOPE *e));
extern char     *pintvl __P((time_t, bool));
extern void     printav __P((SM_FILE_T *, char **));
extern void     printmailer __P((SM_FILE_T *, MAILER *));
extern void     printnqe __P((SM_FILE_T *, char *));
extern void     printopenfds __P((bool));
extern void     printqueue __P((void));
extern void     printrules __P((void));
extern pid_t    prog_open __P((char **, int *, ENVELOPE *));
extern bool     putline __P((char *, MCI *));
extern bool     putxline __P((char *, size_t, MCI *, int));
extern void     queueup_macros __P((int, SM_FILE_T *, ENVELOPE *));
extern void     readcf __P((char *, bool, ENVELOPE *));
extern SIGFUNC_DECL     reapchild __P((int));
extern int      releasesignal __P((int));
extern void     resetlimits __P((void));
extern void     restart_daemon __P((void));
extern void     restart_marked_work_groups __P((void));
extern bool     rfc822_string __P((char *));
extern void     rmexpstab __P((void));
extern bool     savemail __P((ENVELOPE *, bool));
extern void     seed_random __P((void));
extern void     sendtoargv __P((char **, ENVELOPE *));
extern void     setclientoptions __P((char *));
extern bool     setdaemonoptions __P((char *));
extern void     setdefaults __P((ENVELOPE *));
extern void     setdefuser __P((void));
extern bool     setvendor __P((char *));
extern void     set_op_mode __P((int));
extern void     setoption __P((int, char *, bool, bool, ENVELOPE *));
extern sigfunc_t        setsignal __P((int, sigfunc_t));
extern void     sm_setuserenv __P((const char *, const char *));
extern void     settime __P((ENVELOPE *));
#if STARTTLS
extern void     set_tls_rd_tmo __P((int));
#else /* STARTTLS */
#define set_tls_rd_tmo(rd_tmo)
#endif /* STARTTLS */
extern char     *sfgets __P((char *, int, SM_FILE_T *, time_t, char *));
extern char     *shortenstring __P((const char *, size_t));
extern char     *shorten_hostname __P((char []));
extern bool     shorten_rfc822_string __P((char *, size_t));
extern void     shutdown_daemon __P((void));
extern void     sm_closefrom __P((int lowest, int highest));
extern void     sm_close_on_exec __P((int lowest, int highest));
extern struct hostent   *sm_gethostbyname __P((char *, int));
extern struct hostent   *sm_gethostbyaddr __P((char *, int, int));
extern void     sm_getla __P((void));
extern struct passwd    *sm_getpwnam __P((char *));
extern struct passwd    *sm_getpwuid __P((UID_T));
extern void     sm_setproctitle __P((bool, ENVELOPE *, const char *, ...));
extern pid_t    sm_wait __P((int *));
extern bool     split_by_recipient __P((ENVELOPE *e));
extern void     stop_sendmail __P((void));
extern void     stripbackslash __P((char *));
extern bool     strreplnonprt __P((char *, int));
extern bool     strcontainedin __P((bool, char *, char *));
extern int      switch_map_find __P((char *, char *[], short []));
#if STARTTLS
extern void     tls_set_verify __P((SSL_CTX *, SSL *, bool));
#endif /* STARTTLS */
extern bool     transienterror __P((int));
extern void     truncate_at_delim __P((char *, size_t, int));
extern void     tTflag __P((char *));
extern void     tTsetup __P((unsigned char *, unsigned int, char *));
extern SIGFUNC_DECL     tick __P((int));
extern char     *ttypath __P((void));
extern void     unlockqueue __P((ENVELOPE *));
#if !HASUNSETENV
extern void     unsetenv __P((char *));
#endif /* !HASUNSETENV */

/* update file system information: +/- some blocks */
#if SM_CONF_SHM
extern void     upd_qs __P((ENVELOPE *, int, int, char *));
# define updfs(e, count, space, where) upd_qs(e, count, space, where)
#else /* SM_CONF_SHM */
# define updfs(e, count, space, where)
# define upd_qs(e, count, space, where)
#endif /* SM_CONF_SHM */

extern char     *username __P((void));
extern bool     usershellok __P((char *, char *));
extern void     vendor_post_defaults __P((ENVELOPE *));
extern void     vendor_pre_defaults __P((ENVELOPE *));
extern int      waitfor __P((pid_t));
extern bool     writable __P((char *, ADDRESS *, long));
#if SM_HEAP_CHECK
# define xalloc(size)   xalloc_tagged(size, __FILE__, __LINE__)
extern char *xalloc_tagged __P((int, char*, int));
#else /* SM_HEAP_CHECK */
extern char *xalloc __P((int));
#endif /* SM_HEAP_CHECK */
extern void     xputs __P((SM_FILE_T *, const char *));
extern char     *xtextify __P((char *, char *));
extern bool     xtextok __P((char *));
extern int      xunlink __P((char *));
extern char     *xuntextify __P((char *));


#undef EXTERN
#endif /* ! _SENDMAIL_H */