Annotation of 43BSDReno/usr.sbin/sendmail/src/sendmail.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Eric P. Allman
                      3:  * Copyright (c) 1988 Regents of the University of California.
                      4:  * All rights reserved.
                      5:  *
                      6:  * Redistribution and use in source and binary forms are permitted provided
                      7:  * that: (1) source distributions retain this entire copyright notice and
                      8:  * comment, and (2) distributions including binaries display the following
                      9:  * acknowledgement:  ``This product includes software developed by the
                     10:  * University of California, Berkeley and its contributors'' in the
                     11:  * documentation or other materials provided with the distribution and in
                     12:  * all advertising materials mentioning features or use of this software.
                     13:  * Neither the name of the University nor the names of its contributors may
                     14:  * be used to endorse or promote products derived from this software without
                     15:  * specific prior written permission.
                     16:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     19:  *
                     20:  *     @(#)sendmail.h  5.16 (Berkeley) 6/1/90
                     21:  */
                     22: 
                     23: /*
                     24: **  SENDMAIL.H -- Global definitions for sendmail.
                     25: */
                     26: 
                     27: # ifdef _DEFINE
                     28: # define EXTERN
                     29: # ifndef lint
                     30: static char SmailSccsId[] =    "@(#)sendmail.h 5.16            6/1/90";
                     31: # endif lint
                     32: # else  _DEFINE
                     33: # define EXTERN extern
                     34: # endif _DEFINE
                     35: 
                     36: # include <stdio.h>
                     37: # include <ctype.h>
                     38: # include <setjmp.h>
                     39: # include "conf.h"
                     40: # include "useful.h"
                     41: 
                     42: # ifdef LOG
                     43: # include <sys/syslog.h>
                     44: # endif LOG
                     45: 
                     46: # ifdef DAEMON
                     47: # ifdef VMUNIX
                     48: # include <sys/socket.h>
                     49: # include <netinet/in.h>
                     50: # endif VMUNIX
                     51: # endif DAEMON
                     52: 
                     53: 
                     54: # define PSBUFSIZE     (MAXNAME + MAXATOM)     /* size of prescan buffer */
                     55: 
                     56: 
                     57: /*
                     58: **  Data structure for bit maps.
                     59: **
                     60: **     Each bit in this map can be referenced by an ascii character.
                     61: **     This is 128 possible bits, or 12 8-bit bytes.
                     62: */
                     63: 
                     64: #define BITMAPBYTES    16      /* number of bytes in a bit map */
                     65: #define BYTEBITS       8       /* number of bits in a byte */
                     66: 
                     67: /* internal macros */
                     68: #define _BITWORD(bit)  (bit / (BYTEBITS * sizeof (int)))
                     69: #define _BITBIT(bit)   (1 << (bit % (BYTEBITS * sizeof (int))))
                     70: 
                     71: typedef int    BITMAP[BITMAPBYTES / sizeof (int)];
                     72: 
                     73: /* test bit number N */
                     74: #define bitnset(bit, map)      ((map)[_BITWORD(bit)] & _BITBIT(bit))
                     75: 
                     76: /* set bit number N */
                     77: #define setbitn(bit, map)      (map)[_BITWORD(bit)] |= _BITBIT(bit)
                     78: 
                     79: /* clear bit number N */
                     80: #define clrbitn(bit, map)      (map)[_BITWORD(bit)] &= ~_BITBIT(bit)
                     81: 
                     82: /* clear an entire bit map */
                     83: #define clrbitmap(map)         bzero((char *) map, BITMAPBYTES)
                     84: /*
                     85: **  Address structure.
                     86: **     Addresses are stored internally in this structure.
                     87: */
                     88: 
                     89: struct address
                     90: {
                     91:        char            *q_paddr;       /* the printname for the address */
                     92:        char            *q_user;        /* user name */
                     93:        char            *q_ruser;       /* real user name, or NULL if q_user */
                     94:        char            *q_host;        /* host name */
                     95:        struct mailer   *q_mailer;      /* mailer to use */
                     96:        u_short         q_flags;        /* status flags, see below */
                     97:        short           q_uid;          /* user-id of receiver (if known) */
                     98:        short           q_gid;          /* group-id of receiver (if known) */
                     99:        char            *q_home;        /* home dir (local mailer only) */
                    100:        char            *q_fullname;    /* full name if known */
                    101:        struct address  *q_next;        /* chain */
                    102:        struct address  *q_alias;       /* address this results from */
                    103:        struct address  *q_tchain;      /* temporary use chain */
                    104:        time_t          q_timeout;      /* timeout for this address */
                    105: };
                    106: 
                    107: typedef struct address ADDRESS;
                    108: 
                    109: # define QDONTSEND     000001  /* don't send to this address */
                    110: # define QBADADDR      000002  /* this address is verified bad */
                    111: # define QGOODUID      000004  /* the q_uid q_gid fields are good */
                    112: # define QPRIMARY      000010  /* set from argv */
                    113: # define QQUEUEUP      000020  /* queue for later transmission */
                    114: /*
                    115: **  Mailer definition structure.
                    116: **     Every mailer known to the system is declared in this
                    117: **     structure.  It defines the pathname of the mailer, some
                    118: **     flags associated with it, and the argument vector to
                    119: **     pass to it.  The flags are defined in conf.c
                    120: **
                    121: **     The argument vector is expanded before actual use.  All
                    122: **     words except the first are passed through the macro
                    123: **     processor.
                    124: */
                    125: 
                    126: struct mailer
                    127: {
                    128:        char    *m_name;        /* symbolic name of this mailer */
                    129:        char    *m_mailer;      /* pathname of the mailer to use */
                    130:        BITMAP  m_flags;        /* status flags, see below */
                    131:        short   m_mno;          /* mailer number internally */
                    132:        char    **m_argv;       /* template argument vector */
                    133:        short   m_s_rwset;      /* rewriting set for sender addresses */
                    134:        short   m_r_rwset;      /* rewriting set for recipient addresses */
                    135:        char    *m_eol;         /* end of line string */
                    136:        long    m_maxsize;      /* size limit on message to this mailer */
                    137: };
                    138: 
                    139: typedef struct mailer  MAILER;
                    140: 
                    141: /* bits for m_flags */
                    142: # define M_CANONICAL   'C'     /* make addresses canonical "u@dom" */
                    143: # define M_EXPENSIVE   'e'     /* it costs to use this mailer.... */
                    144: # define M_ESCFROM     'E'     /* escape From lines to >From */
                    145: # define M_FOPT                'f'     /* mailer takes picky -f flag */
                    146: # define M_HST_UPPER   'h'     /* preserve host case distinction */
                    147: # define M_INTERNAL    'I'     /* SMTP to another sendmail site */
                    148: # define M_LOCAL       'l'     /* delivery is to this host */
                    149: # define M_LIMITS      'L'     /* must enforce SMTP line limits */
                    150: # define M_MUSER       'm'     /* can handle multiple users at once */
                    151: # define M_NHDR                'n'     /* don't insert From line */
                    152: # define M_FROMPATH    'p'     /* use reverse-path in MAIL FROM: */
                    153: # define M_ROPT                'r'     /* mailer takes picky -r flag */
                    154: # define M_SECURE_PORT 'R'     /* try to send on a reserved TCP port */
                    155: # define M_STRIPQ      's'     /* strip quote chars from user/host */
                    156: # define M_RESTR       'S'     /* must be daemon to execute */
                    157: # define M_USR_UPPER   'u'     /* preserve user case distinction */
                    158: # define M_UGLYUUCP    'U'     /* this wants an ugly UUCP from line */
                    159: # define M_XDOT                'X'     /* use hidden-dot algorithm */
                    160: 
                    161: EXTERN MAILER  *Mailer[MAXMAILERS+1];
                    162: 
                    163: EXTERN MAILER  *LocalMailer;           /* ptr to local mailer */
                    164: EXTERN MAILER  *ProgMailer;            /* ptr to program mailer */
                    165: /*
                    166: **  Header structure.
                    167: **     This structure is used internally to store header items.
                    168: */
                    169: 
                    170: struct header
                    171: {
                    172:        char            *h_field;       /* the name of the field */
                    173:        char            *h_value;       /* the value of that field */
                    174:        struct header   *h_link;        /* the next header */
                    175:        u_short         h_flags;        /* status bits, see below */
                    176:        BITMAP          h_mflags;       /* m_flags bits needed */
                    177: };
                    178: 
                    179: typedef struct header  HDR;
                    180: 
                    181: /*
                    182: **  Header information structure.
                    183: **     Defined in conf.c, this struct declares the header fields
                    184: **     that have some magic meaning.
                    185: */
                    186: 
                    187: struct hdrinfo
                    188: {
                    189:        char    *hi_field;      /* the name of the field */
                    190:        u_short hi_flags;       /* status bits, see below */
                    191: };
                    192: 
                    193: extern struct hdrinfo  HdrInfo[];
                    194: 
                    195: /* bits for h_flags and hi_flags */
                    196: # define H_EOH         00001   /* this field terminates header */
                    197: # define H_RCPT                00002   /* contains recipient addresses */
                    198: # define H_DEFAULT     00004   /* if another value is found, drop this */
                    199: # define H_RESENT      00010   /* this address is a "Resent-..." address */
                    200: # define H_CHECK       00020   /* check h_mflags against m_flags */
                    201: # define H_ACHECK      00040   /* ditto, but always (not just default) */
                    202: # define H_FORCE       00100   /* force this field, even if default */
                    203: # define H_TRACE       00200   /* this field contains trace information */
                    204: # define H_FROM                00400   /* this is a from-type field */
                    205: # define H_VALID       01000   /* this field has a validated value */
                    206: /*
                    207: **  Envelope structure.
                    208: **     This structure defines the message itself.  There is usually
                    209: **     only one of these -- for the message that we originally read
                    210: **     and which is our primary interest -- but other envelopes can
                    211: **     be generated during processing.  For example, error messages
                    212: **     will have their own envelope.
                    213: */
                    214: 
                    215: struct envelope
                    216: {
                    217:        HDR             *e_header;      /* head of header list */
                    218:        long            e_msgpriority;  /* adjusted priority of this message */
                    219:        time_t          e_ctime;        /* time message appeared in the queue */
                    220:        char            *e_to;          /* the target person */
                    221:        char            *e_receiptto;   /* return receipt address */
                    222:        ADDRESS         e_from;         /* the person it is from */
                    223:        char            **e_fromdomain; /* the domain part of the sender */
                    224:        ADDRESS         *e_sendqueue;   /* list of message recipients */
                    225:        ADDRESS         *e_errorqueue;  /* the queue for error responses */
                    226:        long            e_msgsize;      /* size of the message in bytes */
                    227:        int             e_nrcpts;       /* number of recipients */
                    228:        short           e_class;        /* msg class (priority, junk, etc.) */
                    229:        short           e_flags;        /* flags, see below */
                    230:        short           e_hopcount;     /* number of times processed */
                    231:        int             (*e_puthdr)();  /* function to put header of message */
                    232:        int             (*e_putbody)(); /* function to put body of message */
                    233:        struct envelope *e_parent;      /* the message this one encloses */
                    234:        struct envelope *e_sibling;     /* the next envelope of interest */
                    235:        char            *e_df;          /* location of temp file */
                    236:        FILE            *e_dfp;         /* temporary file */
                    237:        char            *e_id;          /* code for this entry in queue */
                    238:        FILE            *e_xfp;         /* transcript file */
                    239:        char            *e_message;     /* error message */
                    240:        char            *e_macro[128];  /* macro definitions */
                    241: };
                    242: 
                    243: typedef struct envelope        ENVELOPE;
                    244: 
                    245: /* values for e_flags */
                    246: #define EF_OLDSTYLE    000001          /* use spaces (not commas) in hdrs */
                    247: #define EF_INQUEUE     000002          /* this message is fully queued */
                    248: #define EF_TIMEOUT     000004          /* this message is too old */
                    249: #define EF_CLRQUEUE    000010          /* disk copy is no longer needed */
                    250: #define EF_SENDRECEIPT 000020          /* send a return receipt */
                    251: #define EF_FATALERRS   000040          /* fatal errors occured */
                    252: #define EF_KEEPQUEUE   000100          /* keep queue files always */
                    253: #define EF_RESPONSE    000200          /* this is an error or return receipt */
                    254: #define EF_RESENT      000400          /* this message is being forwarded */
                    255: 
                    256: EXTERN ENVELOPE        *CurEnv;        /* envelope currently being processed */
                    257: /*
                    258: **  Message priority classes.
                    259: **
                    260: **     The message class is read directly from the Priority: header
                    261: **     field in the message.
                    262: **
                    263: **     CurEnv->e_msgpriority is the number of bytes in the message plus
                    264: **     the creation time (so that jobs ``tend'' to be ordered correctly),
                    265: **     adjusted by the message class, the number of recipients, and the
                    266: **     amount of time the message has been sitting around.  This number
                    267: **     is used to order the queue.  Higher values mean LOWER priority.
                    268: **
                    269: **     Each priority class point is worth WkClassFact priority points;
                    270: **     each recipient is worth WkRecipFact priority points.  Each time
                    271: **     we reprocess a message the priority is adjusted by WkTimeFact.
                    272: **     WkTimeFact should normally decrease the priority so that jobs
                    273: **     that have historically failed will be run later; thanks go to
                    274: **     Jay Lepreau at Utah for pointing out the error in my thinking.
                    275: **
                    276: **     The "class" is this number, unadjusted by the age or size of
                    277: **     this message.  Classes with negative representations will have
                    278: **     error messages thrown away if they are not local.
                    279: */
                    280: 
                    281: struct priority
                    282: {
                    283:        char    *pri_name;      /* external name of priority */
                    284:        int     pri_val;        /* internal value for same */
                    285: };
                    286: 
                    287: EXTERN struct priority Priorities[MAXPRIORITIES];
                    288: EXTERN int             NumPriorities;  /* pointer into Priorities */
                    289: /*
                    290: **  Rewrite rules.
                    291: */
                    292: 
                    293: struct rewrite
                    294: {
                    295:        char    **r_lhs;        /* pattern match */
                    296:        char    **r_rhs;        /* substitution value */
                    297:        struct rewrite  *r_next;/* next in chain */
                    298: };
                    299: 
                    300: EXTERN struct rewrite  *RewriteRules[MAXRWSETS];
                    301: 
                    302: /*
                    303: **  Special characters in rewriting rules.
                    304: **     These are used internally only.
                    305: **     The COND* rules are actually used in macros rather than in
                    306: **             rewriting rules, but are given here because they
                    307: **             cannot conflict.
                    308: */
                    309: 
                    310: /* left hand side items */
                    311: # define MATCHZANY     '\020'  /* match zero or more tokens */
                    312: # define MATCHANY      '\021'  /* match one or more tokens */
                    313: # define MATCHONE      '\022'  /* match exactly one token */
                    314: # define MATCHCLASS    '\023'  /* match one token in a class */
                    315: # define MATCHNCLASS   '\024'  /* match anything not in class */
                    316: # define MATCHREPL     '\025'  /* replacement on RHS for above */
                    317: 
                    318: /* right hand side items */
                    319: # define CANONNET      '\026'  /* canonical net, next token */
                    320: # define CANONHOST     '\027'  /* canonical host, next token */
                    321: # define CANONUSER     '\030'  /* canonical user, next N tokens */
                    322: # define CALLSUBR      '\031'  /* call another rewriting set */
                    323: 
                    324: /* conditionals in macros */
                    325: # define CONDIF                '\032'  /* conditional if-then */
                    326: # define CONDELSE      '\033'  /* conditional else */
                    327: # define CONDFI                '\034'  /* conditional fi */
                    328: 
                    329: /* bracket characters for host name lookup */
                    330: # define HOSTBEGIN     '\035'  /* hostname lookup begin */
                    331: # define HOSTEND       '\036'  /* hostname lookup end */
                    332: 
                    333: /* \001 is also reserved as the macro expansion character */
                    334: /*
                    335: **  Information about hosts that we have looked up recently.
                    336: **
                    337: **     This stuff is 4.2/3bsd specific.
                    338: */
                    339: 
                    340: # ifdef DAEMON
                    341: # ifdef VMUNIX
                    342: 
                    343: # define HOSTINFO      struct hostinfo
                    344: 
                    345: HOSTINFO
                    346: {
                    347:        char            *ho_name;       /* name of this host */
                    348:        struct in_addr  ho_inaddr;      /* internet address */
                    349:        short           ho_flags;       /* flag bits, see below */
                    350:        short           ho_errno;       /* error number on last connection */
                    351:        short           ho_exitstat;    /* exit status from last connection */
                    352: };
                    353: 
                    354: 
                    355: /* flag bits */
                    356: #define HOF_VALID      00001           /* this entry is valid */
                    357: 
                    358: # endif VMUNIX
                    359: # endif DAEMON
                    360: /*
                    361: **  Symbol table definitions
                    362: */
                    363: 
                    364: struct symtab
                    365: {
                    366:        char            *s_name;        /* name to be entered */
                    367:        char            s_type;         /* general type (see below) */
                    368:        struct symtab   *s_next;        /* pointer to next in chain */
                    369:        union
                    370:        {
                    371:                BITMAP          sv_class;       /* bit-map of word classes */
                    372:                ADDRESS         *sv_addr;       /* pointer to address header */
                    373:                MAILER          *sv_mailer;     /* pointer to mailer */
                    374:                char            *sv_alias;      /* alias */
                    375: # ifdef HOSTINFO
                    376:                HOSTINFO        sv_host;        /* host information */
                    377: # endif HOSTINFO
                    378:        }       s_value;
                    379: };
                    380: 
                    381: typedef struct symtab  STAB;
                    382: 
                    383: /* symbol types */
                    384: # define ST_UNDEF      0       /* undefined type */
                    385: # define ST_CLASS      1       /* class map */
                    386: # define ST_ADDRESS    2       /* an address in parsed format */
                    387: # define ST_MAILER     3       /* a mailer header */
                    388: # define ST_ALIAS      4       /* an alias */
                    389: # define ST_HOST       5       /* host information */
                    390: 
                    391: # define s_class       s_value.sv_class
                    392: # define s_address     s_value.sv_addr
                    393: # define s_mailer      s_value.sv_mailer
                    394: # define s_alias       s_value.sv_alias
                    395: # define s_host                s_value.sv_host
                    396: 
                    397: extern STAB    *stab();
                    398: 
                    399: /* opcodes to stab */
                    400: # define ST_FIND       0       /* find entry */
                    401: # define ST_ENTER      1       /* enter if not there */
                    402: /*
                    403: **  STRUCT EVENT -- event queue.
                    404: **
                    405: **     Maintained in sorted order.
                    406: **
                    407: **     We store the pid of the process that set this event to insure
                    408: **     that when we fork we will not take events intended for the parent.
                    409: */
                    410: 
                    411: struct event
                    412: {
                    413:        time_t          ev_time;        /* time of the function call */
                    414:        int             (*ev_func)();   /* function to call */
                    415:        int             ev_arg;         /* argument to ev_func */
                    416:        int             ev_pid;         /* pid that set this event */
                    417:        struct event    *ev_link;       /* link to next item */
                    418: };
                    419: 
                    420: typedef struct event   EVENT;
                    421: 
                    422: EXTERN EVENT   *EventQueue;            /* head of event queue */
                    423: /*
                    424: **  Operation, send, and error modes
                    425: **
                    426: **     The operation mode describes the basic operation of sendmail.
                    427: **     This can be set from the command line, and is "send mail" by
                    428: **     default.
                    429: **
                    430: **     The send mode tells how to send mail.  It can be set in the
                    431: **     configuration file.  It's setting determines how quickly the
                    432: **     mail will be delivered versus the load on your system.  If the
                    433: **     -v (verbose) flag is given, it will be forced to SM_DELIVER
                    434: **     mode.
                    435: **
                    436: **     The error mode tells how to return errors.
                    437: */
                    438: 
                    439: EXTERN char    OpMode;         /* operation mode, see below */
                    440: 
                    441: #define MD_DELIVER     'm'             /* be a mail sender */
                    442: #define MD_ARPAFTP     'a'             /* old-style arpanet protocols */
                    443: #define MD_SMTP                's'             /* run SMTP on standard input */
                    444: #define MD_DAEMON      'd'             /* run as a daemon */
                    445: #define MD_VERIFY      'v'             /* verify: don't collect or deliver */
                    446: #define MD_TEST                't'             /* test mode: resolve addrs only */
                    447: #define MD_INITALIAS   'i'             /* initialize alias database */
                    448: #define MD_PRINT       'p'             /* print the queue */
                    449: #define MD_FREEZE      'z'             /* freeze the configuration file */
                    450: 
                    451: 
                    452: EXTERN char    SendMode;       /* send mode, see below */
                    453: 
                    454: #define SM_DELIVER     'i'             /* interactive delivery */
                    455: #define SM_QUICKD      'j'             /* deliver w/o queueing */
                    456: #define SM_FORK                'b'             /* deliver in background */
                    457: #define SM_QUEUE       'q'             /* queue, don't deliver */
                    458: #define SM_VERIFY      'v'             /* verify only (used internally) */
                    459: 
                    460: /* used only as a parameter to sendall */
                    461: #define SM_DEFAULT     '\0'            /* unspecified, use SendMode */
                    462: 
                    463: 
                    464: EXTERN char    ErrorMode;      /* error mode, see below */
                    465: 
                    466: #define EM_PRINT       'p'             /* print errors */
                    467: #define EM_MAIL                'm'             /* mail back errors */
                    468: #define EM_WRITE       'w'             /* write back errors */
                    469: #define EM_BERKNET     'e'             /* special berknet processing */
                    470: #define EM_QUIET       'q'             /* don't print messages (stat only) */
                    471: 
                    472: /* offset used to issure that the error messages for name server error
                    473:  * codes are unique.
                    474:  */
                    475: #define        MAX_ERRNO       100
                    476: /*
                    477: **  Global variables.
                    478: */
                    479: 
                    480: EXTERN bool    FromFlag;       /* if set, "From" person is explicit */
                    481: EXTERN bool    NoAlias;        /* if set, don't do any aliasing */
                    482: EXTERN bool    ForceMail;      /* if set, mail even if already got a copy */
                    483: EXTERN bool    MeToo;          /* send to the sender also */
                    484: EXTERN bool    IgnrDot;        /* don't let dot end messages */
                    485: EXTERN bool    SaveFrom;       /* save leading "From" lines */
                    486: EXTERN bool    Verbose;        /* set if blow-by-blow desired */
                    487: EXTERN bool    GrabTo;         /* if set, get recipients from msg */
                    488: EXTERN bool    NoReturn;       /* don't return letter to sender */
                    489: EXTERN bool    SuprErrs;       /* set if we are suppressing errors */
                    490: EXTERN bool    QueueRun;       /* currently running message from the queue */
                    491: EXTERN bool    HoldErrs;       /* only output errors to transcript */
                    492: EXTERN bool    NoConnect;      /* don't connect to non-local mailers */
                    493: EXTERN bool    SuperSafe;      /* be extra careful, even if expensive */
                    494: EXTERN bool    ForkQueueRuns;  /* fork for each job when running the queue */
                    495: EXTERN bool    AutoRebuild;    /* auto-rebuild the alias database as needed */
                    496: EXTERN bool    CheckAliases;   /* parse addresses during newaliases */
                    497: EXTERN bool    UseNameServer;  /* use internet domain name server */
                    498: EXTERN int     SafeAlias;      /* minutes to wait until @:@ in alias file */
                    499: EXTERN time_t  TimeOut;        /* time until timeout */
                    500: EXTERN FILE    *InChannel;     /* input connection */
                    501: EXTERN FILE    *OutChannel;    /* output connection */
                    502: EXTERN int     RealUid;        /* when Daemon, real uid of caller */
                    503: EXTERN int     RealGid;        /* when Daemon, real gid of caller */
                    504: EXTERN int     DefUid;         /* default uid to run as */
                    505: EXTERN char    *DefUser;       /* default user to run as (from DefUid) */
                    506: EXTERN int     DefGid;         /* default gid to run as */
                    507: EXTERN int     OldUmask;       /* umask when sendmail starts up */
                    508: EXTERN int     Errors;         /* set if errors (local to single pass) */
                    509: EXTERN int     ExitStat;       /* exit status code */
                    510: EXTERN int     AliasLevel;     /* depth of aliasing */
                    511: EXTERN int     MotherPid;      /* proc id of parent process */
                    512: EXTERN int     LineNumber;     /* line number in current input */
                    513: EXTERN time_t  ReadTimeout;    /* timeout on reads */
                    514: EXTERN int     LogLevel;       /* level of logging to perform */
                    515: EXTERN int     FileMode;       /* mode on files */
                    516: EXTERN int     QueueLA;        /* load average starting forced queueing */
                    517: EXTERN int     RefuseLA;       /* load average refusing connections are */
                    518: EXTERN int     QueueFactor;    /* slope of queue function */
                    519: EXTERN time_t  QueueIntvl;     /* intervals between running the queue */
                    520: EXTERN char    *AliasFile;     /* location of alias file */
                    521: EXTERN char    *HelpFile;      /* location of SMTP help file */
                    522: EXTERN char    *StatFile;      /* location of statistics summary */
                    523: EXTERN char    *QueueDir;      /* location of queue directory */
                    524: EXTERN char    *FileName;      /* name to print on error messages */
                    525: EXTERN char    *SmtpPhase;     /* current phase in SMTP processing */
                    526: EXTERN char    *MyHostName;    /* name of this host for SMTP messages */
                    527: EXTERN char    *RealHostName;  /* name of host we are talking to */
                    528: EXTERN struct  sockaddr_in RealHostAddr;/* address of host we are talking to */
                    529: EXTERN char    *CurHostName;   /* current host we are dealing with */
                    530: EXTERN jmp_buf TopFrame;       /* branch-to-top-of-loop-on-error frame */
                    531: EXTERN bool    QuickAbort;     /*  .... but only if we want a quick abort */
                    532: extern char    *ConfFile;      /* location of configuration file [conf.c] */
                    533: extern char    *FreezeFile;    /* location of frozen memory image [conf.c] */
                    534: extern char    Arpa_Info[];    /* the reply code for Arpanet info [conf.c] */
                    535: extern ADDRESS NullAddress;    /* a null (template) address [main.c] */
                    536: EXTERN char    SpaceSub;       /* substitution for <lwsp> */
                    537: EXTERN int     WkClassFact;    /* multiplier for message class -> priority */
                    538: EXTERN int     WkRecipFact;    /* multiplier for # of recipients -> priority */
                    539: EXTERN int     WkTimeFact;     /* priority offset each time this job is run */
                    540: EXTERN int     CheckPointLimit;        /* deliveries before checkpointing */
                    541: EXTERN int     Nmx;                    /* number of MX RRs */
                    542: EXTERN char    *PostMasterCopy;        /* address to get errs cc's */
                    543: EXTERN char    *MxHosts[MAXMXHOSTS+1]; /* for MX RRs */
                    544: EXTERN char    *TrustedUsers[MAXTRUST+1];      /* list of trusted users */
                    545: EXTERN char    *UserEnviron[MAXUSERENVIRON+1]; /* saved user environment */
                    546: /*
                    547: **  Trace information
                    548: */
                    549: 
                    550: /* trace vector and macros for debugging flags */
                    551: EXTERN u_char  tTdvect[100];
                    552: # define tTd(flag, level)      (tTdvect[flag] >= level)
                    553: # define tTdlevel(flag)                (tTdvect[flag])
                    554: /*
                    555: **  Miscellaneous information.
                    556: */
                    557: 
                    558: # include      <sysexits.h>
                    559: 
                    560: 
                    561: /*
                    562: **  Some in-line functions
                    563: */
                    564: 
                    565: /* set exit status */
                    566: #define setstat(s)     { \
                    567:                                if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \
                    568:                                        ExitStat = s; \
                    569:                        }
                    570: 
                    571: /* make a copy of a string */
                    572: #define newstr(s)      strcpy(xalloc(strlen(s) + 1), s)
                    573: 
                    574: #define STRUCTCOPY(s, d)       d = s
                    575: 
                    576: 
                    577: /*
                    578: **  Declarations of useful functions
                    579: */
                    580: 
                    581: extern ADDRESS *parseaddr();
                    582: extern char    *xalloc();
                    583: extern bool    sameaddr();
                    584: extern FILE    *dfopen();
                    585: extern EVENT   *setevent();
                    586: extern char    *sfgets();
                    587: extern char    *queuename();
                    588: extern time_t  curtime();

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