sendmail.h

早期freebsd实现

{
	HDR		*e_header;	/* head of header list */
	long		e_msgpriority;	/* adjusted priority of this message */
	time_t		e_ctime;	/* time message appeared in the queue */
	char		*e_to;		/* the target person */
	char		*e_receiptto;	/* return receipt address */
	ADDRESS		e_from;		/* the person it is from */
	char		*e_sender;	/* e_from.q_paddr w comments stripped */
	char		**e_fromdomain;	/* the domain part of the sender */
	ADDRESS		*e_sendqueue;	/* list of message recipients */
	ADDRESS		*e_errorqueue;	/* the queue for error responses */
	long		e_msgsize;	/* size of the message in bytes */
	long		e_flags;	/* flags, see below */
	int		e_nrcpts;	/* number of recipients */
	short		e_class;	/* msg class (priority, junk, etc.) */
	short		e_hopcount;	/* number of times processed */
	short		e_nsent;	/* number of sends since checkpoint */
	short		e_sendmode;	/* message send mode */
	short		e_errormode;	/* error return mode */
	int		(*e_puthdr)__P((MCI *, ENVELOPE *));
					/* function to put header of message */
	int		(*e_putbody)__P((MCI *, ENVELOPE *, char *));
					/* function to put body of message */
	struct envelope	*e_parent;	/* the message this one encloses */
	struct envelope *e_sibling;	/* the next envelope of interest */
	char		*e_bodytype;	/* type of message body */
	char		*e_df;		/* location of temp file */
	FILE		*e_dfp;		/* temporary file */
	char		*e_id;		/* code for this entry in queue */
	FILE		*e_xfp;		/* transcript file */
	FILE		*e_lockfp;	/* the lock file for this message */
	char		*e_message;	/* error message */
	char		*e_statmsg;	/* stat msg (changes per delivery) */
	char		*e_msgboundary;	/* MIME-style message part boundary */
	char		*e_origrcpt;	/* original recipient (one only) */
	char		*e_macro[128];	/* macro definitions */
};

/* values for e_flags */
#define EF_OLDSTYLE	0x0000001	/* use spaces (not commas) in hdrs */
#define EF_INQUEUE	0x0000002	/* this message is fully queued */
#define EF_CLRQUEUE	0x0000008	/* disk copy is no longer needed */
#define EF_SENDRECEIPT	0x0000010	/* send a return receipt */
#define EF_FATALERRS	0x0000020	/* fatal errors occured */
#define EF_KEEPQUEUE	0x0000040	/* keep queue files always */
#define EF_RESPONSE	0x0000080	/* this is an error or return receipt */
#define EF_RESENT	0x0000100	/* this message is being forwarded */
#define EF_VRFYONLY	0x0000200	/* verify only (don't expand aliases) */
#define EF_WARNING	0x0000400	/* warning message has been sent */
#define EF_QUEUERUN	0x0000800	/* this envelope is from queue */
#define EF_GLOBALERRS	0x0001000	/* treat errors as global */
#define EF_PM_NOTIFY	0x0002000	/* send return mail to postmaster */
#define EF_METOO	0x0004000	/* send to me too */
#define EF_LOGSENDER	0x0008000	/* need to log the sender */
#define EF_NORECEIPT	0x0010000	/* suppress all return-receipts */

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

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

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

struct rewrite
{
	char	**r_lhs;	/* pattern match */
	char	**r_rhs;	/* substitution value */
	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.