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      1 /*	$NetBSD: rcpt_buf.c,v 1.4 2022/10/08 16:12:45 christos Exp $	*/
      2 
      3 /*++
      4 /* NAME
      5 /*	rcpt_buf
      6 /* SUMMARY
      7 /*	recipient buffer manager
      8 /* SYNOPSIS
      9 /*	#include <rcpt_buf.h>
     10 /*
     11 /*	typedef struct {
     12 /*		RECIPIENT rcpt;		/* convenience */
     13 /* .in +4
     14 /*		VSTRING *address;	/* final recipient */
     15 /*		VSTRING *orig_addr;	/* original recipient */
     16 /*		VSTRING *dsn_orcpt;	/* dsn original recipient */
     17 /*		int     dsn_notify;	/* DSN notify flags */
     18 /*		long    offset;		/* REC_TYPE_RCPT byte */
     19 /* .in -4
     20 /*	} RCPT_BUF;
     21 /*
     22 /*	RECIPIENT *RECIPIENT_FROM_RCPT_BUF(rcpb)
     23 /*	RCPT_BUF *rcpb;
     24 /*
     25 /*	RCPT_BUF *rcpb_create(void)
     26 /*
     27 /*	void	rcpb_reset(rcpb)
     28 /*	RCPT_BUF *rcpb;
     29 /*
     30 /*	void	rcpb_free(rcpb)
     31 /*	RCPT_BUF *rcpb;
     32 /*
     33 /*	int	rcpb_scan(scan_fn, stream, flags, ptr)
     34 /*	ATTR_SCAN_COMMON_FN scan_fn;
     35 /*	VSTREAM *stream;
     36 /*	int	flags;
     37 /*	void	*ptr;
     38 /* DESCRIPTION
     39 /*	RECIPIENT_FROM_RCPT_BUF() populates the rcpt member with
     40 /*	a shallow copy of the contents of the other fields.
     41 /*
     42 /*	rcpb_scan() reads a recipient buffer from the named stream
     43 /*	using the specified attribute scan routine. rcpb_scan()
     44 /*	is meant to be passed as a call-back to attr_scan(), thusly:
     45 /*
     46 /*	... ATTR_TYPE_FUNC, rcpb_scan, (void *) rcpt_buf, ...
     47 /*
     48 /*	rcpb_create(), rcpb_reset() and rcpb_free() create, wipe
     49 /*	and destroy recipient buffer instances.
     50 /* DIAGNOSTICS
     51 /*	Fatal: out of memory.
     52 /* LICENSE
     53 /* .ad
     54 /* .fi
     55 /*	The Secure Mailer license must be distributed with this software.
     56 /* AUTHOR(S)
     57 /*	Wietse Venema
     58 /*	IBM T.J. Watson Research
     59 /*	P.O. Box 704
     60 /*	Yorktown Heights, NY 10598, USA
     61 /*
     62 /*	Wietse Venema
     63 /*	Google, Inc.
     64 /*	111 8th Avenue
     65 /*	New York, NY 10011, USA
     66 /*--*/
     67 
     68 /* System library. */
     69 
     70 #include <sys_defs.h>
     71 
     72 /* Utility library. */
     73 
     74 #include <mymalloc.h>
     75 #include <vstring.h>
     76 #include <vstream.h>
     77 
     78 /* Global library. */
     79 
     80 #include <mail_proto.h>
     81 #include <rcpt_buf.h>
     82 
     83 /* Application-specific. */
     84 
     85 /* rcpb_create - create recipient buffer */
     86 
     87 RCPT_BUF *rcpb_create(void)
     88 {
     89     RCPT_BUF *rcpt;
     90 
     91     rcpt = (RCPT_BUF *) mymalloc(sizeof(*rcpt));
     92     rcpt->offset = 0;
     93     rcpt->dsn_orcpt = vstring_alloc(10);
     94     rcpt->dsn_notify = 0;
     95     rcpt->orig_addr = vstring_alloc(10);
     96     rcpt->address = vstring_alloc(10);
     97     return (rcpt);
     98 }
     99 
    100 /* rcpb_reset - reset recipient buffer */
    101 
    102 void    rcpb_reset(RCPT_BUF *rcpt)
    103 {
    104 #define BUF_TRUNCATE(s) (vstring_str(s)[0] = 0)
    105 
    106     rcpt->offset = 0;
    107     BUF_TRUNCATE(rcpt->dsn_orcpt);
    108     rcpt->dsn_notify = 0;
    109     BUF_TRUNCATE(rcpt->orig_addr);
    110     BUF_TRUNCATE(rcpt->address);
    111 }
    112 
    113 /* rcpb_free - destroy recipient buffer */
    114 
    115 void    rcpb_free(RCPT_BUF *rcpt)
    116 {
    117     vstring_free(rcpt->dsn_orcpt);
    118     vstring_free(rcpt->orig_addr);
    119     vstring_free(rcpt->address);
    120     myfree((void *) rcpt);
    121 }
    122 
    123 /* rcpb_scan - receive recipient buffer */
    124 
    125 int     rcpb_scan(ATTR_SCAN_COMMON_FN scan_fn, VSTREAM *fp,
    126 		          int flags, void *ptr)
    127 {
    128     RCPT_BUF *rcpt = (RCPT_BUF *) ptr;
    129     int     ret;
    130 
    131     /*
    132      * The order of attributes is determined by historical compatibility and
    133      * can be fixed after all the ad-hoc read/write code is replaced.
    134      */
    135     ret = scan_fn(fp, flags | ATTR_FLAG_MORE,
    136 		  RECV_ATTR_STR(MAIL_ATTR_ORCPT, rcpt->orig_addr),
    137 		  RECV_ATTR_STR(MAIL_ATTR_RECIP, rcpt->address),
    138 		  RECV_ATTR_LONG(MAIL_ATTR_OFFSET, &rcpt->offset),
    139 		  RECV_ATTR_STR(MAIL_ATTR_DSN_ORCPT, rcpt->dsn_orcpt),
    140 		  RECV_ATTR_INT(MAIL_ATTR_DSN_NOTIFY, &rcpt->dsn_notify),
    141 		  ATTR_TYPE_END);
    142     return (ret == 5 ? 1 : -1);
    143 }
    144