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974 lines
35 KiB
C
974 lines
35 KiB
C
/*
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* Copyright (c) 1983 Eric P. Allman
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)sendmail.h 8.43.1.1 (Berkeley) 2/10/95
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*/
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/*
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** SENDMAIL.H -- Global definitions for sendmail.
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*/
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# ifdef _DEFINE
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# define EXTERN
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# ifndef lint
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static char SmailSccsId[] = "@(#)sendmail.h 8.43.1.1 2/10/95";
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# endif
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# else /* _DEFINE */
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# define EXTERN extern
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# endif /* _DEFINE */
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# include <unistd.h>
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# include <stddef.h>
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# include <stdlib.h>
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# include <stdio.h>
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# include <ctype.h>
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# include <setjmp.h>
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# include <sysexits.h>
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# include <string.h>
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# include <time.h>
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# include <errno.h>
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# include "conf.h"
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# include "useful.h"
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# ifdef LOG
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# include <syslog.h>
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# endif /* LOG */
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# ifdef DAEMON
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# include <sys/socket.h>
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# endif
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# ifdef NETUNIX
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# include <sys/un.h>
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# endif
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# ifdef NETINET
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# include <netinet/in.h>
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# endif
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# ifdef NETISO
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# include <netiso/iso.h>
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# endif
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# ifdef NETNS
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# include <netns/ns.h>
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# endif
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# ifdef NETX25
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# include <netccitt/x25.h>
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# endif
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/*
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** Data structure for bit maps.
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**
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** Each bit in this map can be referenced by an ascii character.
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** This is 128 possible bits, or 12 8-bit bytes.
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*/
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#define BITMAPBYTES 16 /* number of bytes in a bit map */
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#define BYTEBITS 8 /* number of bits in a byte */
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/* internal macros */
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#define _BITWORD(bit) (bit / (BYTEBITS * sizeof (int)))
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#define _BITBIT(bit) (1 << (bit % (BYTEBITS * sizeof (int))))
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typedef int BITMAP[BITMAPBYTES / sizeof (int)];
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/* test bit number N */
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#define bitnset(bit, map) ((map)[_BITWORD(bit)] & _BITBIT(bit))
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/* set bit number N */
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#define setbitn(bit, map) (map)[_BITWORD(bit)] |= _BITBIT(bit)
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/* clear bit number N */
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#define clrbitn(bit, map) (map)[_BITWORD(bit)] &= ~_BITBIT(bit)
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/* clear an entire bit map */
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#define clrbitmap(map) bzero((char *) map, BITMAPBYTES)
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/*
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** Address structure.
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** Addresses are stored internally in this structure.
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*/
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struct address
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{
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char *q_paddr; /* the printname for the address */
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char *q_user; /* user name */
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char *q_ruser; /* real user name, or NULL if q_user */
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char *q_host; /* host name */
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struct mailer *q_mailer; /* mailer to use */
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u_short q_flags; /* status flags, see below */
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uid_t q_uid; /* user-id of receiver (if known) */
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gid_t q_gid; /* group-id of receiver (if known) */
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char *q_home; /* home dir (local mailer only) */
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char *q_fullname; /* full name if known */
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struct address *q_next; /* chain */
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struct address *q_alias; /* address this results from */
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char *q_owner; /* owner of q_alias */
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struct address *q_tchain; /* temporary use chain */
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time_t q_timeout; /* timeout for this address */
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};
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typedef struct address ADDRESS;
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# define QDONTSEND 000001 /* don't send to this address */
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# define QBADADDR 000002 /* this address is verified bad */
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# define QGOODUID 000004 /* the q_uid q_gid fields are good */
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# define QPRIMARY 000010 /* set from argv */
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# define QQUEUEUP 000020 /* queue for later transmission */
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# define QSENT 000040 /* has been successfully delivered */
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# define QNOTREMOTE 000100 /* not an address for remote forwarding */
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# define QSELFREF 000200 /* this address references itself */
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# define QVERIFIED 000400 /* verified, but not expanded */
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# define QREPORT 001000 /* report this address in return message */
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# define QBOGUSSHELL 002000 /* this entry has an invalid shell listed */
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# define QUNSAFEADDR 004000 /* address aquired through an unsafe path */
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# define NULLADDR ((ADDRESS *) NULL)
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/*
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** Mailer definition structure.
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** Every mailer known to the system is declared in this
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** structure. It defines the pathname of the mailer, some
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** flags associated with it, and the argument vector to
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** pass to it. The flags are defined in conf.c
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**
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** The argument vector is expanded before actual use. All
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** words except the first are passed through the macro
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** processor.
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*/
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struct mailer
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{
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char *m_name; /* symbolic name of this mailer */
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char *m_mailer; /* pathname of the mailer to use */
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BITMAP m_flags; /* status flags, see below */
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short m_mno; /* mailer number internally */
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char **m_argv; /* template argument vector */
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short m_sh_rwset; /* rewrite set: sender header addresses */
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short m_se_rwset; /* rewrite set: sender envelope addresses */
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short m_rh_rwset; /* rewrite set: recipient header addresses */
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short m_re_rwset; /* rewrite set: recipient envelope addresses */
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char *m_eol; /* end of line string */
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long m_maxsize; /* size limit on message to this mailer */
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int m_linelimit; /* max # characters per line */
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char *m_execdir; /* directory to chdir to before execv */
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};
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typedef struct mailer MAILER;
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/* bits for m_flags */
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# define M_ESMTP 'a' /* run Extended SMTP protocol */
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# define M_BLANKEND 'b' /* ensure blank line at end of message */
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# define M_NOCOMMENT 'c' /* don't include comment part of address */
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# define M_CANONICAL 'C' /* make addresses canonical "u@dom" */
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/* 'D' /* CF: include Date: */
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# define M_EXPENSIVE 'e' /* it costs to use this mailer.... */
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# define M_ESCFROM 'E' /* escape From lines to >From */
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# define M_FOPT 'f' /* mailer takes picky -f flag */
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/* 'F' /* CF: include From: or Resent-From: */
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# define M_NO_NULL_FROM 'g' /* sender of errors should be $g */
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# define M_HST_UPPER 'h' /* preserve host case distinction */
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# define M_PREHEAD 'H' /* MAIL11V3: preview headers */
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# define M_INTERNAL 'I' /* SMTP to another sendmail site */
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# define M_LOCALMAILER 'l' /* delivery is to this host */
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# define M_LIMITS 'L' /* must enforce SMTP line limits */
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# define M_MUSER 'm' /* can handle multiple users at once */
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/* 'M' /* CF: include Message-Id: */
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# define M_NHDR 'n' /* don't insert From line */
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# define M_MANYSTATUS 'N' /* MAIL11V3: DATA returns multi-status */
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# define M_FROMPATH 'p' /* use reverse-path in MAIL FROM: */
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/* 'P' /* CF: include Return-Path: */
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# define M_ROPT 'r' /* mailer takes picky -r flag */
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# define M_SECURE_PORT 'R' /* try to send on a reserved TCP port */
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# define M_STRIPQ 's' /* strip quote chars from user/host */
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# define M_RESTR 'S' /* must be daemon to execute */
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# define M_USR_UPPER 'u' /* preserve user case distinction */
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# define M_UGLYUUCP 'U' /* this wants an ugly UUCP from line */
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/* 'V' /* UIUC: !-relativize all addresses */
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/* 'x' /* CF: include Full-Name: */
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# define M_XDOT 'X' /* use hidden-dot algorithm */
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# define M_7BITS '7' /* use 7-bit path */
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EXTERN MAILER *Mailer[MAXMAILERS+1];
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EXTERN MAILER *LocalMailer; /* ptr to local mailer */
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EXTERN MAILER *ProgMailer; /* ptr to program mailer */
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EXTERN MAILER *FileMailer; /* ptr to *file* mailer */
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EXTERN MAILER *InclMailer; /* ptr to *include* mailer */
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/*
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** Header structure.
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** This structure is used internally to store header items.
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*/
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struct header
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{
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char *h_field; /* the name of the field */
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char *h_value; /* the value of that field */
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struct header *h_link; /* the next header */
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u_short h_flags; /* status bits, see below */
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BITMAP h_mflags; /* m_flags bits needed */
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};
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typedef struct header HDR;
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/*
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** Header information structure.
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** Defined in conf.c, this struct declares the header fields
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** that have some magic meaning.
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*/
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struct hdrinfo
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{
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char *hi_field; /* the name of the field */
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u_short hi_flags; /* status bits, see below */
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};
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extern struct hdrinfo HdrInfo[];
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/* bits for h_flags and hi_flags */
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# define H_EOH 00001 /* this field terminates header */
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# define H_RCPT 00002 /* contains recipient addresses */
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# define H_DEFAULT 00004 /* if another value is found, drop this */
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# define H_RESENT 00010 /* this address is a "Resent-..." address */
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# define H_CHECK 00020 /* check h_mflags against m_flags */
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# define H_ACHECK 00040 /* ditto, but always (not just default) */
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# define H_FORCE 00100 /* force this field, even if default */
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# define H_TRACE 00200 /* this field contains trace information */
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# define H_FROM 00400 /* this is a from-type field */
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# define H_VALID 01000 /* this field has a validated value */
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# define H_RECEIPTTO 02000 /* this field has return receipt info */
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# define H_ERRORSTO 04000 /* this field has error address info */
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/*
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** Information about currently open connections to mailers, or to
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** hosts that we have looked up recently.
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*/
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# define MCI struct mailer_con_info
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MCI
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{
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short mci_flags; /* flag bits, see below */
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short mci_errno; /* error number on last connection */
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short mci_herrno; /* h_errno from last DNS lookup */
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short mci_exitstat; /* exit status from last connection */
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short mci_state; /* SMTP state */
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long mci_maxsize; /* max size this server will accept */
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FILE *mci_in; /* input side of connection */
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FILE *mci_out; /* output side of connection */
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int mci_pid; /* process id of subordinate proc */
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char *mci_phase; /* SMTP phase string */
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struct mailer *mci_mailer; /* ptr to the mailer for this conn */
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char *mci_host; /* host name */
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time_t mci_lastuse; /* last usage time */
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};
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/* flag bits */
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#define MCIF_VALID 000001 /* this entry is valid */
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#define MCIF_TEMP 000002 /* don't cache this connection */
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#define MCIF_CACHED 000004 /* currently in open cache */
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#define MCIF_ESMTP 000010 /* this host speaks ESMTP */
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#define MCIF_EXPN 000020 /* EXPN command supported */
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#define MCIF_SIZE 000040 /* SIZE option supported */
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#define MCIF_8BITMIME 000100 /* BODY=8BITMIME supported */
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#define MCIF_7BIT 000200 /* strip this message to 7 bits */
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#define MCIF_MULTSTAT 000400 /* MAIL11V3: handles MULT status */
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/* states */
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#define MCIS_CLOSED 0 /* no traffic on this connection */
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#define MCIS_OPENING 1 /* sending initial protocol */
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#define MCIS_OPEN 2 /* open, initial protocol sent */
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#define MCIS_ACTIVE 3 /* message being sent */
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#define MCIS_QUITING 4 /* running quit protocol */
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#define MCIS_SSD 5 /* service shutting down */
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#define MCIS_ERROR 6 /* I/O error on connection */
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/*
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** Envelope structure.
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** This structure defines the message itself. There is usually
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** only one of these -- for the message that we originally read
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** and which is our primary interest -- but other envelopes can
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** be generated during processing. For example, error messages
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** will have their own envelope.
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*/
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# define ENVELOPE struct envelope
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ENVELOPE
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{
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HDR *e_header; /* head of header list */
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long e_msgpriority; /* adjusted priority of this message */
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time_t e_ctime; /* time message appeared in the queue */
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char *e_to; /* the target person */
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char *e_receiptto; /* return receipt address */
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ADDRESS e_from; /* the person it is from */
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char *e_sender; /* e_from.q_paddr w comments stripped */
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char **e_fromdomain; /* the domain part of the sender */
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ADDRESS *e_sendqueue; /* list of message recipients */
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ADDRESS *e_errorqueue; /* the queue for error responses */
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long e_msgsize; /* size of the message in bytes */
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long e_flags; /* flags, see below */
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int e_nrcpts; /* number of recipients */
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short e_class; /* msg class (priority, junk, etc.) */
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short e_hopcount; /* number of times processed */
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short e_nsent; /* number of sends since checkpoint */
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short e_sendmode; /* message send mode */
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short e_errormode; /* error return mode */
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int (*e_puthdr)__P((MCI *, ENVELOPE *));
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/* function to put header of message */
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int (*e_putbody)__P((MCI *, ENVELOPE *, char *));
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/* function to put body of message */
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struct envelope *e_parent; /* the message this one encloses */
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struct envelope *e_sibling; /* the next envelope of interest */
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char *e_bodytype; /* type of message body */
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char *e_df; /* location of temp file */
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FILE *e_dfp; /* temporary file */
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char *e_id; /* code for this entry in queue */
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FILE *e_xfp; /* transcript file */
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FILE *e_lockfp; /* the lock file for this message */
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char *e_message; /* error message */
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char *e_statmsg; /* stat msg (changes per delivery) */
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char *e_msgboundary; /* MIME-style message part boundary */
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char *e_origrcpt; /* original recipient (one only) */
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char *e_macro[128]; /* macro definitions */
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};
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/* values for e_flags */
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#define EF_OLDSTYLE 0x0000001 /* use spaces (not commas) in hdrs */
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#define EF_INQUEUE 0x0000002 /* this message is fully queued */
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#define EF_CLRQUEUE 0x0000008 /* disk copy is no longer needed */
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#define EF_SENDRECEIPT 0x0000010 /* send a return receipt */
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#define EF_FATALERRS 0x0000020 /* fatal errors occured */
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#define EF_KEEPQUEUE 0x0000040 /* keep queue files always */
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||
#define EF_RESPONSE 0x0000080 /* this is an error or return receipt */
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||
#define EF_RESENT 0x0000100 /* this message is being forwarded */
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||
#define EF_VRFYONLY 0x0000200 /* verify only (don't expand aliases) */
|
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#define EF_WARNING 0x0000400 /* warning message has been sent */
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#define EF_QUEUERUN 0x0000800 /* this envelope is from queue */
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||
#define EF_GLOBALERRS 0x0001000 /* treat errors as global */
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#define EF_PM_NOTIFY 0x0002000 /* send return mail to postmaster */
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#define EF_METOO 0x0004000 /* send to me too */
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||
#define EF_LOGSENDER 0x0008000 /* need to log the sender */
|
||
#define EF_NORECEIPT 0x0010000 /* suppress all return-receipts */
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||
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||
EXTERN ENVELOPE *CurEnv; /* envelope currently being processed */
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||
/*
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||
** Message priority classes.
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||
**
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||
** 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
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||
{
|
||
char *pri_name; /* external name of priority */
|
||
int pri_val; /* internal value for same */
|
||
};
|
||
|
||
EXTERN struct priority Priorities[MAXPRIORITIES];
|
||
EXTERN int NumPriorities; /* pointer into Priorities */
|
||
/*
|
||
** Rewrite rules.
|
||
*/
|
||
|
||
struct rewrite
|
||
{
|
||
char **r_lhs; /* pattern match */
|
||
char **r_rhs; /* substitution value */
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||
struct rewrite *r_next;/* next in chain */
|
||
};
|
||
|
||
EXTERN struct rewrite *RewriteRules[MAXRWSETS];
|
||
|
||
/*
|
||
** 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.
|
||
*/
|
||
|
||
/* left hand side items */
|
||
# define MATCHZANY 0220 /* match zero or more tokens */
|
||
# define MATCHANY 0221 /* match one or more tokens */
|
||
# define MATCHONE 0222 /* match exactly one token */
|
||
# define MATCHCLASS 0223 /* match one token in a class */
|
||
# define MATCHNCLASS 0224 /* match anything not in class */
|
||
# define MATCHREPL 0225 /* replacement on RHS for above */
|
||
|
||
/* right hand side items */
|
||
# define CANONNET 0226 /* canonical net, next token */
|
||
# define CANONHOST 0227 /* canonical host, next token */
|
||
# define CANONUSER 0230 /* canonical user, next N tokens */
|
||
# define CALLSUBR 0231 /* call another rewriting set */
|
||
|
||
/* conditionals in macros */
|
||
# define CONDIF 0232 /* conditional if-then */
|
||
# define CONDELSE 0233 /* conditional else */
|
||
# define CONDFI 0234 /* conditional fi */
|
||
|
||
/* bracket characters for host name lookup */
|
||
# define HOSTBEGIN 0235 /* hostname lookup begin */
|
||
# define HOSTEND 0236 /* hostname lookup end */
|
||
|
||
/* bracket characters for generalized lookup */
|
||
# define LOOKUPBEGIN 0205 /* generalized lookup begin */
|
||
# define LOOKUPEND 0206 /* generalized lookup end */
|
||
|
||
/* macro substitution character */
|
||
# define MACROEXPAND 0201 /* macro expansion */
|
||
# define MACRODEXPAND 0202 /* deferred macro expansion */
|
||
|
||
/* to make the code clearer */
|
||
# define MATCHZERO CANONHOST
|
||
|
||
/* external <==> internal mapping table */
|
||
struct metamac
|
||
{
|
||
char metaname; /* external code (after $) */
|
||
u_char metaval; /* internal code (as above) */
|
||
};
|
||
/*
|
||
** 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 */
|
||
};
|
||
|
||
/* values for nc_flags */
|
||
#define NCF_VALID 0x0001 /* entry valid */
|
||
/*
|
||
** 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
|
||
|
||
|
||
/*
|
||
** An actual map.
|
||
*/
|
||
|
||
MAP
|
||
{
|
||
MAPCLASS *map_class; /* the class of this map */
|
||
char *map_mname; /* name of this map */
|
||
int 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_app; /* to append to successful 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 */
|
||
};
|
||
|
||
/* bit values for map_flags */
|
||
# define MF_VALID 0x0001 /* this entry is valid */
|
||
# define MF_INCLNULL 0x0002 /* include null byte in key */
|
||
# define MF_OPTIONAL 0x0004 /* don't complain if map not found */
|
||
# define MF_NOFOLDCASE 0x0008 /* don't fold case in keys */
|
||
# define MF_MATCHONLY 0x0010 /* don't use the map value */
|
||
# define MF_OPEN 0x0020 /* this entry is open */
|
||
# define MF_WRITABLE 0x0040 /* open for writing */
|
||
# define MF_ALIAS 0x0080 /* this is an alias file */
|
||
# define MF_TRY0NULL 0x0100 /* try with no null byte */
|
||
# define MF_TRY1NULL 0x0200 /* try with the null byte */
|
||
# define MF_LOCKED 0x0400 /* this map is currently locked */
|
||
# define MF_ALIASWAIT 0x0800 /* alias map in aliaswait state */
|
||
# define MF_IMPL_HASH 0x1000 /* implicit: underlying hash database */
|
||
# define MF_IMPL_NDBM 0x2000 /* implicit: underlying NDBM database */
|
||
|
||
|
||
/*
|
||
** 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 */
|
||
/*
|
||
** Symbol table definitions
|
||
*/
|
||
|
||
struct symtab
|
||
{
|
||
char *s_name; /* name to be entered */
|
||
char s_type; /* general type (see below) */
|
||
struct symtab *s_next; /* pointer to next in chain */
|
||
union
|
||
{
|
||
BITMAP 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 */
|
||
char *sv_hostsig; /* host signature */
|
||
MCI sv_mci; /* mailer connection info */
|
||
NAMECANON sv_namecanon; /* canonical name cache */
|
||
} 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_MCI 16 /* 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
|
||
|
||
extern STAB *stab __P((char *, int, int));
|
||
extern void stabapply __P((void (*)(STAB *, int), int));
|
||
|
||
/* opcodes to stab */
|
||
# define ST_FIND 0 /* find entry */
|
||
# define ST_ENTER 1 /* enter if not there */
|
||
/*
|
||
** STRUCT EVENT -- event queue.
|
||
**
|
||
** Maintained in sorted order.
|
||
**
|
||
** We store the pid of the process that set this event to insure
|
||
** that when we fork we will not take events intended for the parent.
|
||
*/
|
||
|
||
struct event
|
||
{
|
||
time_t ev_time; /* time of the function call */
|
||
int (*ev_func)__P((int));
|
||
/* function to call */
|
||
int ev_arg; /* argument to ev_func */
|
||
int ev_pid; /* pid that set this event */
|
||
struct event *ev_link; /* link to next item */
|
||
};
|
||
|
||
typedef struct event EVENT;
|
||
|
||
EXTERN EVENT *EventQueue; /* head of event queue */
|
||
/*
|
||
** Operation, send, and error 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. It's 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.
|
||
*/
|
||
|
||
EXTERN char OpMode; /* operation mode, see below */
|
||
|
||
#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_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_FREEZE 'z' /* freeze the configuration file */
|
||
|
||
|
||
/* values for e_sendmode -- send modes */
|
||
#define SM_DELIVER 'i' /* interactive delivery */
|
||
#define SM_QUICKD 'j' /* deliver w/o queueing */
|
||
#define SM_FORK 'b' /* deliver in background */
|
||
#define SM_QUEUE 'q' /* queue, don't deliver */
|
||
#define SM_VERIFY 'v' /* verify only (used internally) */
|
||
|
||
/* used only as a parameter to sendall */
|
||
#define SM_DEFAULT '\0' /* unspecified, use SendMode */
|
||
|
||
|
||
/* 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) */
|
||
/*
|
||
** Additional definitions
|
||
*/
|
||
|
||
|
||
/*
|
||
** Privacy flags
|
||
** These are bit values for the PrivacyFlags word.
|
||
*/
|
||
|
||
#define PRIV_PUBLIC 0 /* what have I got to hide? */
|
||
#define PRIV_NEEDMAILHELO 00001 /* insist on HELO for MAIL, at least */
|
||
#define PRIV_NEEDEXPNHELO 00002 /* insist on HELO for EXPN */
|
||
#define PRIV_NEEDVRFYHELO 00004 /* insist on HELO for VRFY */
|
||
#define PRIV_NOEXPN 00010 /* disallow EXPN command entirely */
|
||
#define PRIV_NOVRFY 00020 /* disallow VRFY command entirely */
|
||
#define PRIV_AUTHWARNINGS 00040 /* flag possible authorization probs */
|
||
#define PRIV_NORECEIPTS 00100 /* disallow return receipts */
|
||
#define PRIV_RESTRICTMAILQ 01000 /* restrict mailq command */
|
||
#define PRIV_RESTRICTQRUN 02000 /* restrict queue run */
|
||
#define PRIV_GOAWAY 00777 /* don't give no info, anyway, anyhow */
|
||
|
||
/* struct defining such things */
|
||
struct prival
|
||
{
|
||
char *pv_name; /* name of privacy flag */
|
||
int pv_flag; /* numeric level */
|
||
};
|
||
|
||
|
||
/*
|
||
** Flags passed to remotename, parseaddr, allocaddr, and buildaddr.
|
||
*/
|
||
|
||
#define RF_SENDERADDR 0001 /* this is a sender address */
|
||
#define RF_HEADERADDR 0002 /* this is a header address */
|
||
#define RF_CANONICAL 0004 /* strip comment information */
|
||
#define RF_ADDDOMAIN 0010 /* OK to do domain extension */
|
||
#define RF_COPYPARSE 0020 /* copy parsed user & host */
|
||
#define RF_COPYPADDR 0040 /* copy print address */
|
||
#define RF_COPYALL (RF_COPYPARSE|RF_COPYPADDR)
|
||
#define RF_COPYNONE 0
|
||
|
||
|
||
/*
|
||
** Flags passed to safefile.
|
||
*/
|
||
|
||
#define SFF_ANYFILE 0 /* no special restrictions */
|
||
#define SFF_MUSTOWN 0x0001 /* user must own this file */
|
||
#define SFF_NOSLINK 0x0002 /* file cannot be a symbolic link */
|
||
#define SFF_ROOTOK 0x0004 /* ok for root to own this file */
|
||
|
||
|
||
/*
|
||
** Regular UNIX sockaddrs are too small to handle ISO addresses, so
|
||
** we are forced to declare a supertype here.
|
||
*/
|
||
|
||
union bigsockaddr
|
||
{
|
||
struct sockaddr sa; /* general version */
|
||
#ifdef NETUNIX
|
||
struct sockaddr_un sunix; /* UNIX family */
|
||
#endif
|
||
#ifdef NETINET
|
||
struct sockaddr_in sin; /* INET family */
|
||
#endif
|
||
#ifdef NETISO
|
||
struct sockaddr_iso siso; /* ISO family */
|
||
#endif
|
||
#ifdef NETNS
|
||
struct sockaddr_ns sns; /* XNS family */
|
||
#endif
|
||
#ifdef NETX25
|
||
struct sockaddr_x25 sx25; /* X.25 family */
|
||
#endif
|
||
};
|
||
|
||
#define SOCKADDR union bigsockaddr
|
||
/*
|
||
** Global variables.
|
||
*/
|
||
|
||
EXTERN bool FromFlag; /* if set, "From" person is explicit */
|
||
EXTERN bool MeToo; /* send to the sender also */
|
||
EXTERN bool IgnrDot; /* don't let dot end messages */
|
||
EXTERN bool SaveFrom; /* save leading "From" lines */
|
||
EXTERN bool Verbose; /* set if blow-by-blow desired */
|
||
EXTERN bool GrabTo; /* if set, get recipients from msg */
|
||
EXTERN bool NoReturn; /* don't return letter to sender */
|
||
EXTERN bool SuprErrs; /* set if we are suppressing errors */
|
||
EXTERN bool HoldErrs; /* only output errors to transcript */
|
||
EXTERN bool NoConnect; /* don't connect to non-local mailers */
|
||
EXTERN bool SuperSafe; /* be extra careful, even if expensive */
|
||
EXTERN bool ForkQueueRuns; /* fork for each job when running the queue */
|
||
EXTERN bool AutoRebuild; /* auto-rebuild the alias database as needed */
|
||
EXTERN bool CheckAliases; /* parse addresses during newaliases */
|
||
EXTERN bool NoAlias; /* suppress aliasing */
|
||
EXTERN bool UseNameServer; /* use internet domain name server */
|
||
EXTERN bool SevenBit; /* force 7-bit data */
|
||
EXTERN time_t SafeAlias; /* interval to wait until @:@ in alias file */
|
||
EXTERN FILE *InChannel; /* input connection */
|
||
EXTERN FILE *OutChannel; /* output connection */
|
||
EXTERN uid_t RealUid; /* when Daemon, real uid of caller */
|
||
EXTERN gid_t RealGid; /* when Daemon, real gid of caller */
|
||
EXTERN uid_t DefUid; /* default uid to run as */
|
||
EXTERN gid_t DefGid; /* default gid to run as */
|
||
EXTERN char *DefUser; /* default user to run as (from DefUid) */
|
||
EXTERN int OldUmask; /* umask when sendmail starts up */
|
||
EXTERN int Errors; /* set if errors (local to single pass) */
|
||
EXTERN int ExitStat; /* exit status code */
|
||
EXTERN int AliasLevel; /* depth of aliasing */
|
||
EXTERN int LineNumber; /* line number in current input */
|
||
EXTERN int LogLevel; /* level of logging to perform */
|
||
EXTERN int FileMode; /* mode on files */
|
||
EXTERN int QueueLA; /* load average starting forced queueing */
|
||
EXTERN int RefuseLA; /* load average refusing connections are */
|
||
EXTERN int CurrentLA; /* current load average */
|
||
EXTERN long QueueFactor; /* slope of queue function */
|
||
EXTERN time_t QueueIntvl; /* intervals between running the queue */
|
||
EXTERN char *HelpFile; /* location of SMTP help file */
|
||
EXTERN char *ErrMsgFile; /* file to prepend to all error messages */
|
||
EXTERN char *StatFile; /* location of statistics summary */
|
||
EXTERN char *QueueDir; /* location of queue directory */
|
||
EXTERN char *FileName; /* name to print on error messages */
|
||
EXTERN char *SmtpPhase; /* current phase in SMTP processing */
|
||
EXTERN char *MyHostName; /* name of this host for SMTP messages */
|
||
EXTERN char *RealHostName; /* name of host we are talking to */
|
||
EXTERN SOCKADDR RealHostAddr; /* address of host we are talking to */
|
||
EXTERN char *CurHostName; /* current host we are dealing with */
|
||
EXTERN jmp_buf TopFrame; /* branch-to-top-of-loop-on-error frame */
|
||
EXTERN bool QuickAbort; /* .... but only if we want a quick abort */
|
||
EXTERN bool LogUsrErrs; /* syslog user errors (e.g., SMTP RCPT cmd) */
|
||
EXTERN bool SendMIMEErrors; /* send error messages in MIME format */
|
||
EXTERN bool MatchGecos; /* look for user names in gecos field */
|
||
EXTERN bool UseErrorsTo; /* use Errors-To: header (back compat) */
|
||
EXTERN bool TryNullMXList; /* if we are the best MX, try host directly */
|
||
extern bool CheckLoopBack; /* check for loopback on HELO packet */
|
||
EXTERN bool InChild; /* true if running in an SMTP subprocess */
|
||
EXTERN bool DisConnected; /* running with OutChannel redirected to xf */
|
||
EXTERN char SpaceSub; /* substitution for <lwsp> */
|
||
EXTERN int PrivacyFlags; /* privacy flags */
|
||
EXTERN char *ConfFile; /* location of configuration file [conf.c] */
|
||
extern char *PidFile; /* location of proc id file [conf.c] */
|
||
extern ADDRESS NullAddress; /* a null (template) address [main.c] */
|
||
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 *UdbSpec; /* user database source spec */
|
||
EXTERN int MaxHopCount; /* max # of hops until bounce */
|
||
EXTERN int ConfigLevel; /* config file level */
|
||
EXTERN char *TimeZoneSpec; /* override time zone specification */
|
||
EXTERN char *ForwardPath; /* path to search for .forward files */
|
||
EXTERN long MinBlocksFree; /* min # of blocks free on queue fs */
|
||
EXTERN char *FallBackMX; /* fall back MX host */
|
||
EXTERN long MaxMessageSize; /* advertised max size we will accept */
|
||
EXTERN char *PostMasterCopy; /* address to get errs cc's */
|
||
EXTERN int CheckpointInterval; /* queue file checkpoint interval */
|
||
EXTERN bool DontPruneRoutes; /* don't prune source routes */
|
||
extern bool BrokenSmtpPeers; /* peers can't handle 2-line greeting */
|
||
EXTERN int MaxMciCache; /* maximum entries in MCI cache */
|
||
EXTERN time_t MciCacheTimeout; /* maximum idle time on connections */
|
||
EXTERN char *QueueLimitRecipient; /* limit queue runs to this recipient */
|
||
EXTERN char *QueueLimitSender; /* limit queue runs to this sender */
|
||
EXTERN char *QueueLimitId; /* limit queue runs to this id */
|
||
EXTERN FILE *TrafficLogFile; /* file in which to log all traffic */
|
||
extern int errno;
|
||
|
||
|
||
/*
|
||
** 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_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 */
|
||
/* following are per message */
|
||
time_t to_q_return; /* queue return timeout */
|
||
time_t to_q_warning; /* queue warning timeout */
|
||
} TimeOuts;
|
||
|
||
|
||
/*
|
||
** Trace information
|
||
*/
|
||
|
||
/* trace vector and macros for debugging flags */
|
||
EXTERN u_char tTdvect[100];
|
||
# define tTd(flag, level) (tTdvect[flag] >= level)
|
||
# define tTdlevel(flag) (tTdvect[flag])
|
||
/*
|
||
** Miscellaneous information.
|
||
*/
|
||
|
||
|
||
|
||
/*
|
||
** Some in-line functions
|
||
*/
|
||
|
||
/* set exit status */
|
||
#define setstat(s) { \
|
||
if (ExitStat == EX_OK || ExitStat == EX_TEMPFAIL) \
|
||
ExitStat = s; \
|
||
}
|
||
|
||
/* make a copy of a string */
|
||
#define newstr(s) strcpy(xalloc(strlen(s) + 1), s)
|
||
|
||
#define STRUCTCOPY(s, d) d = s
|
||
|
||
|
||
/*
|
||
** Declarations of useful functions
|
||
*/
|
||
|
||
extern ADDRESS *parseaddr __P((char *, ADDRESS *, int, int, char **, ENVELOPE *));
|
||
extern char *xalloc __P((int));
|
||
extern bool sameaddr __P((ADDRESS *, ADDRESS *));
|
||
extern FILE *dfopen __P((char *, int, int));
|
||
extern EVENT *setevent __P((time_t, int(*)(), int));
|
||
extern char *sfgets __P((char *, int, FILE *, time_t, char *));
|
||
extern char *queuename __P((ENVELOPE *, int));
|
||
extern time_t curtime __P(());
|
||
extern bool transienterror __P((int));
|
||
extern const char *errstring __P((int));
|
||
extern void expand __P((char *, char *, char *, ENVELOPE *));
|
||
extern void define __P((int, char *, ENVELOPE *));
|
||
extern char *macvalue __P((int, ENVELOPE *));
|
||
extern char **prescan __P((char *, int, char[], int, char **));
|
||
extern int rewrite __P((char **, int, int, ENVELOPE *));
|
||
extern char *fgetfolded __P((char *, int, FILE *));
|
||
extern ADDRESS *recipient __P((ADDRESS *, ADDRESS **, ENVELOPE *));
|
||
extern ENVELOPE *newenvelope __P((ENVELOPE *, ENVELOPE *));
|
||
extern void dropenvelope __P((ENVELOPE *));
|
||
extern void clearenvelope __P((ENVELOPE *, int));
|
||
extern char *username __P(());
|
||
extern MCI *mci_get __P((char *, MAILER *));
|
||
extern char *pintvl __P((time_t, int));
|
||
extern char *map_rewrite __P((MAP *, char *, int, char **));
|
||
extern ADDRESS *getctladdr __P((ADDRESS *));
|
||
extern char *anynet_ntoa __P((SOCKADDR *));
|
||
extern char *remotename __P((char *, MAILER *, int, int *, ENVELOPE *));
|
||
extern bool shouldqueue __P((long, time_t));
|
||
extern bool lockfile __P((int, char *, char *, int));
|
||
extern char *hostsignature __P((MAILER *, char *, ENVELOPE *));
|
||
extern void openxscript __P((ENVELOPE *));
|
||
extern void closexscript __P((ENVELOPE *));
|
||
extern sigfunc_t setsignal __P((int, sigfunc_t));
|
||
extern char *shortenstring __P((char *, int));
|
||
extern bool usershellok __P((char *));
|
||
extern void commaize __P((HDR *, char *, int, MCI *, ENVELOPE *));
|
||
extern char *denlstring __P((char *));
|
||
|
||
/* ellipsis is a different case though */
|
||
#ifdef __STDC__
|
||
extern void auth_warning(ENVELOPE *, const char *, ...);
|
||
extern void syserr(const char *, ...);
|
||
extern void usrerr(const char *, ...);
|
||
extern void message(const char *, ...);
|
||
extern void nmessage(const char *, ...);
|
||
#else
|
||
extern void auth_warning();
|
||
extern void syserr();
|
||
extern void usrerr();
|
||
extern void message();
|
||
extern void nmessage();
|
||
#endif
|