sendmail.h

早期freebsd实现

**
**	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 *));

/* 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