sendmail.h

早期freebsd实现

/*
 * Copyright (c) 1983 Eric P. Allman
 * Copyright (c) 1988, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)sendmail.h	8.43 (Berkeley) 4/14/94
 */

/*
**  SENDMAIL.H -- Global definitions for sendmail.
*/

# ifdef _DEFINE
# define EXTERN
# ifndef lint
static char SmailSccsId[] =	"@(#)sendmail.h	8.43		4/14/94";
# endif
# else /*  _DEFINE */
# define EXTERN extern
# endif /* _DEFINE */

# include <unistd.h>
# include <stddef.h>
# include <stdlib.h>
# include <stdio.h>
# include <ctype.h>
# include <setjmp.h>
# include <sysexits.h>
# include <string.h>
# include <time.h>
# include <errno.h>

# include "conf.h"
# include "useful.h"

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

# ifdef DAEMON
# include <sys/socket.h>
# endif
# ifdef NETUNIX
# include <sys/un.h>
# endif
# ifdef NETINET
# include <netinet/in.h>
# endif
# ifdef NETISO
# include <netiso/iso.h>
# endif
# ifdef NETNS
# include <netns/ns.h>
# endif
# ifdef NETX25
# include <netccitt/x25.h>
# endif




/*
**  Data structure for bit maps.
**
**	Each bit in this map can be referenced by an ascii character.
**	This is 128 possible bits, or 12 8-bit bytes.
*/

#define BITMAPBYTES	16	/* number of bytes in a bit map */
#define BYTEBITS	8	/* number of bits in a byte */

/* internal macros */
#define _BITWORD(bit)	(bit / (BYTEBITS * sizeof (int)))
#define _BITBIT(bit)	(1 << (bit % (BYTEBITS * sizeof (int))))

typedef int	BITMAP[BITMAPBYTES / sizeof (int)];

/* test bit number N */
#define bitnset(bit, map)	((map)[_BITWORD(bit)] & _BITBIT(bit))

/* set bit number N */
#define setbitn(bit, map)	(map)[_BITWORD(bit)] |= _BITBIT(bit)

/* clear bit number N */
#define clrbitn(bit, map)	(map)[_BITWORD(bit)] &= ~_BITBIT(bit)

/* clear an entire bit map */
#define clrbitmap(map)		bzero((char *) map, BITMAPBYTES)
/*
**  Address structure.
**	Addresses are stored internally in this structure.
*/

struct address
{
	char		*q_paddr;	/* the printname for the address */
	char		*q_user;	/* user name */
	char		*q_ruser;	/* real user name, or NULL if q_user */
	char		*q_host;	/* host name */
	struct mailer	*q_mailer;	/* mailer to use */
	u_short		q_flags;	/* status flags, see below */
	uid_t		q_uid;		/* user-id of receiver (if known) */
	gid_t		q_gid;		/* group-id of receiver (if known) */
	char		*q_home;	/* home dir (local mailer only) */
	char		*q_fullname;	/* full name if known */
	struct address	*q_next;	/* chain */
	struct address	*q_alias;	/* address this results from */
	char		*q_owner;	/* owner of q_alias */
	struct address	*q_tchain;	/* temporary use chain */
	time_t		q_timeout;	/* timeout for this address */
};

typedef struct address ADDRESS;

# define QDONTSEND	000001	/* don't send to this address */
# define QBADADDR	000002	/* this address is verified bad */
# define QGOODUID	000004	/* the q_uid q_gid fields are good */
# define QPRIMARY	000010	/* set from argv */
# define QQUEUEUP	000020	/* queue for later transmission */
# define QSENT		000040	/* has been successfully delivered */
# define QNOTREMOTE	000100	/* not an address for remote forwarding */
# define QSELFREF	000200	/* this address references itself */
# define QVERIFIED	000400	/* verified, but not expanded */
# define QREPORT	001000	/* report this address in return message */
# define QBOGUSSHELL	002000	/* this entry has an invalid shell listed */
# define QUNSAFEADDR	004000	/* address aquired through an unsafe path */

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

struct mailer
{
	char	*m_name;	/* symbolic name of this mailer */
	char	*m_mailer;	/* pathname of the mailer to use */
	BITMAP	m_flags;	/* status flags, see below */
	short	m_mno;		/* mailer number internally */
	char	**m_argv;	/* template argument vector */
	short	m_sh_rwset;	/* rewrite set: sender header addresses */
	short	m_se_rwset;	/* rewrite set: sender envelope addresses */
	short	m_rh_rwset;	/* rewrite set: recipient header addresses */
	short	m_re_rwset;	/* rewrite set: recipient envelope addresses */
	char	*m_eol;		/* end of line string */
	long	m_maxsize;	/* size limit on message to this mailer */
	int	m_linelimit;	/* max # characters per line */
	char	*m_execdir;	/* directory to chdir to before execv */
};

typedef struct mailer	MAILER;

/* bits for m_flags */
# define M_ESMTP	'a'	/* run Extended SMTP protocol */
# define M_BLANKEND	'b'	/* ensure blank line at end of message */
# define M_NOCOMMENT	'c'	/* don't include comment part of address */
# define M_CANONICAL	'C'	/* make addresses canonical "u@dom" */
		/*	'D'	/* CF: include Date: */
# define M_EXPENSIVE	'e'	/* it costs to use this mailer.... */
# define M_ESCFROM	'E'	/* escape From lines to >From */
# define M_FOPT		'f'	/* mailer takes picky -f flag */
		/*	'F'	/* CF: include From: or Resent-From: */
# define M_NO_NULL_FROM	'g'	/* sender of errors should be $g */
# define M_HST_UPPER	'h'	/* preserve host case distinction */
# define M_PREHEAD	'H'	/* MAIL11V3: preview headers */
# define M_INTERNAL	'I'	/* SMTP to another sendmail site */
# define M_LOCALMAILER	'l'	/* delivery is to this host */
# define M_LIMITS	'L'	/* must enforce SMTP line limits */
# define M_MUSER	'm'	/* can handle multiple users at once */
		/*	'M'	/* CF: include Message-Id: */
# define M_NHDR		'n'	/* don't insert From line */
# define M_MANYSTATUS	'N'	/* MAIL11V3: DATA returns multi-status */
# define M_FROMPATH	'p'	/* use reverse-path in MAIL FROM: */
		/*	'P'	/* CF: include Return-Path: */
# define M_ROPT		'r'	/* mailer takes picky -r flag */
# define M_SECURE_PORT	'R'	/* try to send on a reserved TCP port */
# define M_STRIPQ	's'	/* strip quote chars from user/host */
# define M_RESTR	'S'	/* must be daemon to execute */
# define M_USR_UPPER	'u'	/* preserve user case distinction */
# define M_UGLYUUCP	'U'	/* this wants an ugly UUCP from line */
		/*	'V'	/* UIUC: !-relativize all addresses */
		/*	'x'	/* CF: include Full-Name: */
# define M_XDOT		'X'	/* use hidden-dot algorithm */
# define M_7BITS	'7'	/* use 7-bit path */

EXTERN MAILER	*Mailer[MAXMAILERS+1];

EXTERN MAILER	*LocalMailer;		/* ptr to local mailer */
EXTERN MAILER	*ProgMailer;		/* ptr to program mailer */
EXTERN MAILER	*FileMailer;		/* ptr to *file* mailer */
EXTERN MAILER	*InclMailer;		/* ptr to *include* mailer */
/*
**  Header structure.
**	This structure is used internally to store header items.
*/

struct header
{
	char		*h_field;	/* the name of the field */
	char		*h_value;	/* the value of that field */
	struct header	*h_link;	/* the next header */
	u_short		h_flags;	/* status bits, see below */
	BITMAP		h_mflags;	/* m_flags bits needed */
};

typedef struct header	HDR;

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

struct hdrinfo
{
	char	*hi_field;	/* the name of the field */
	u_short	hi_flags;	/* status bits, see below */
};

extern struct hdrinfo	HdrInfo[];

/* bits for h_flags and hi_flags */
# define H_EOH		00001	/* this field terminates header */
# define H_RCPT		00002	/* contains recipient addresses */
# define H_DEFAULT	00004	/* if another value is found, drop this */
# define H_RESENT	00010	/* this address is a "Resent-..." address */
# define H_CHECK	00020	/* check h_mflags against m_flags */
# define H_ACHECK	00040	/* ditto, but always (not just default) */
# define H_FORCE	00100	/* force this field, even if default */
# define H_TRACE	00200	/* this field contains trace information */
# define H_FROM		00400	/* this is a from-type field */
# define H_VALID	01000	/* this field has a validated value */
# define H_RECEIPTTO	02000	/* this field has return receipt info */
# define H_ERRORSTO	04000	/* this field has error address info */
/*
**  Information about currently open connections to mailers, or to
**  hosts that we have looked up recently.
*/

# define MCI		struct mailer_con_info

MCI
{
	short		mci_flags;	/* flag bits, see below */
	short		mci_errno;	/* error number on last connection */
	short		mci_herrno;	/* h_errno from last DNS lookup */
	short		mci_exitstat;	/* exit status from last connection */
	short		mci_state;	/* SMTP state */
	long		mci_maxsize;	/* max size this server will accept */
	FILE		*mci_in;	/* input side of connection */
	FILE		*mci_out;	/* output side of connection */
	int		mci_pid;	/* process id of subordinate proc */
	char		*mci_phase;	/* SMTP phase string */
	struct mailer	*mci_mailer;	/* ptr to the mailer for this conn */
	char		*mci_host;	/* host name */
	time_t		mci_lastuse;	/* last usage time */
};


/* flag bits */
#define MCIF_VALID	000001		/* this entry is valid */
#define MCIF_TEMP	000002		/* don't cache this connection */
#define MCIF_CACHED	000004		/* currently in open cache */
#define MCIF_ESMTP	000010		/* this host speaks ESMTP */
#define MCIF_EXPN	000020		/* EXPN command supported */
#define MCIF_SIZE	000040		/* SIZE option supported */
#define MCIF_8BITMIME	000100		/* BODY=8BITMIME supported */
#define MCIF_7BIT	000200		/* strip this message to 7 bits */
#define MCIF_MULTSTAT	000400		/* MAIL11V3: handles MULT status */

/* states */
#define MCIS_CLOSED	0		/* no traffic on this connection */
#define MCIS_OPENING	1		/* sending initial protocol */
#define MCIS_OPEN	2		/* open, initial protocol sent */
#define MCIS_ACTIVE	3		/* message being sent */
#define MCIS_QUITING	4		/* running quit protocol */
#define MCIS_SSD	5		/* service shutting down */
#define MCIS_ERROR	6		/* I/O error on connection */
/*
**  Envelope structure.
**	This structure defines the message itself.  There is usually
**	only one of these -- for the message that we originally read
**	and which is our primary interest -- but other envelopes can
**	be generated during processing.  For example, error messages
**	will have their own envelope.
*/

# define ENVELOPE	struct envelope

ENVELOPE