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      1 /*	$NetBSD: header_opts.h,v 1.4 2026/05/09 18:49:16 christos Exp $	*/
      2 
      3 #ifndef _HEADER_OPTS_H_INCLUDED_
      4 #define _HEADER_OPTS_H_INCLUDED_
      5 
      6 /*++
      7 /* NAME
      8 /*	header_opts 3h
      9 /* SUMMARY
     10 /*	message header classification
     11 /* SYNOPSIS
     12 /*	#include <header_opts.h>
     13 /* DESCRIPTION
     14 /* .nf
     15 
     16  /* External interface. */
     17 
     18 typedef struct {
     19     const char *name;			/* name, preferred capitalization */
     20     int     type;			/* type, see below */
     21     int     flags;			/* flags, see below */
     22 } HEADER_OPTS;
     23 
     24  /*
     25   * Header types.
     26   */
     27 #define HDR_OTHER			0
     28 #define HDR_APPARENTLY_TO		1
     29 #define HDR_BCC				2
     30 #define HDR_CC				3
     31 #define HDR_CONTENT_LENGTH		4
     32 #define HDR_CONTENT_TRANSFER_ENCODING	5
     33 #define HDR_CONTENT_TYPE		6
     34 #define HDR_DATE			7
     35 #define HDR_DELIVERED_TO		8
     36 #define HDR_ERRORS_TO			9
     37 #define HDR_FROM			10
     38 #define HDR_MESSAGE_ID			11
     39 #define HDR_RECEIVED			12
     40 #define HDR_REPLY_TO			13
     41 #define HDR_RESENT_BCC			14
     42 #define HDR_RESENT_CC			15
     43 #define HDR_RESENT_DATE			16
     44 #define HDR_RESENT_FROM			17
     45 #define HDR_RESENT_MESSAGE_ID		18
     46 #define HDR_RESENT_REPLY_TO		19
     47 #define HDR_RESENT_SENDER		20
     48 #define HDR_RESENT_TO			21
     49 #define HDR_RETURN_PATH			22
     50 #define HDR_RETURN_RECEIPT_TO		23
     51 #define HDR_SENDER			24
     52 #define HDR_TO				25
     53 #define HDR_MAIL_FOLLOWUP_TO		26
     54 #define HDR_CONTENT_DESCRIPTION		27
     55 #define HDR_CONTENT_DISPOSITION		28
     56 #define HDR_CONTENT_ID			29
     57 #define HDR_MIME_VERSION		30
     58 #define HDR_DISP_NOTIFICATION		31
     59 #define HDR_TLS_REQUIRED		32	/* RFC 8689 */
     60 #define HDR_REQTLS_ESMTP		33	/* non-standard */
     61 
     62  /*
     63   * Header flags.
     64   */
     65 #define HDR_OPT_DROP	(1<<0)		/* delete from input */
     66 #define HDR_OPT_SENDER	(1<<1)		/* sender address */
     67 #define HDR_OPT_RECIP	(1<<2)		/* recipient address */
     68 #define HDR_OPT_RR	(1<<3)		/* Resent- header */
     69 #define HDR_OPT_EXTRACT	(1<<4)		/* extract flag */
     70 #define HDR_OPT_MIME	(1<<5)		/* MIME header */
     71 
     72 #define HDR_OPT_XRECIP	(HDR_OPT_RECIP | HDR_OPT_EXTRACT)
     73 
     74 extern const HEADER_OPTS *header_opts_find(const char *);
     75 
     76 /* LICENSE
     77 /* .ad
     78 /* .fi
     79 /*	The Secure Mailer license must be distributed with this software.
     80 /* AUTHOR(S)
     81 /*	Wietse Venema
     82 /*	IBM T.J. Watson Research
     83 /*	P.O. Box 704
     84 /*	Yorktown Heights, NY 10598, USA
     85 /*
     86 /*	Wietse Venema
     87 /*	porcupine.org
     88 /*--*/
     89 
     90 #endif
     91