external/ibm-public/postfix/dist/src/global/rcpt_buf.c

   1 /*      $NetBSD$        */
   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_MASTER_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
  63 /* Syste, library. */
  64
  65 #include <sys_defs.h>
  66
  67 /* Utility library. */
  68
  69 #include <mymalloc.h>
  70 #include <vstring.h>
  71 #include <vstream.h>
  72
  73 /* Global library. */
  74
  75 #include <mail_proto.h>
  76 #include <rcpt_buf.h>
  77
  78 /* Application-specific. */
  79
  80 /* rcpb_create - create recipient buffer */
  81
  82 RCPT_BUF *rcpb_create(void)
  83 {
  84     RCPT_BUF *rcpt;
  85
  86     rcpt = (RCPT_BUF *) mymalloc(sizeof(*rcpt));
  87     rcpt->offset = 0;
  88     rcpt->dsn_orcpt = vstring_alloc(10);
  89     rcpt->dsn_notify = 0;
  90     rcpt->orig_addr = vstring_alloc(10);
  91     rcpt->address = vstring_alloc(10);
  92     return (rcpt);
  93 }
  94
  95 /* rcpb_reset - reset recipient buffer */
  96
  97 void    rcpb_reset(RCPT_BUF *rcpt)
  98 {
  99 #define BUF_TRUNCATE(s) (vstring_str(s)[0] = 0)
 100
 101     rcpt->offset = 0;
 102     BUF_TRUNCATE(rcpt->dsn_orcpt);
 103     rcpt->dsn_notify = 0;
 104     BUF_TRUNCATE(rcpt->orig_addr);
 105     BUF_TRUNCATE(rcpt->address);
 106 }
 107
 108 /* rcpb_free - destroy recipient buffer */
 109
 110 void    rcpb_free(RCPT_BUF *rcpt)
 111 {
 112     vstring_free(rcpt->dsn_orcpt);
 113     vstring_free(rcpt->orig_addr);
 114     vstring_free(rcpt->address);
 115     myfree((char *) rcpt);
 116 }
 117
 118 /* rcpb_scan - receive recipient buffer */
 119
 120 int     rcpb_scan(ATTR_SCAN_MASTER_FN scan_fn, VSTREAM *fp,
 121                           int flags, void *ptr)
 122 {
 123     RCPT_BUF *rcpt = (RCPT_BUF *) ptr;
 124     int     ret;
 125
 126     /*
 127      * The order of attributes is determined by historical compatibility and
 128      * can be fixed after all the ad-hoc read/write code is replaced.
 129      */
 130     ret = scan_fn(fp, flags | ATTR_FLAG_MORE,
 131                   ATTR_TYPE_STR, MAIL_ATTR_ORCPT, rcpt->orig_addr,
 132                   ATTR_TYPE_STR, MAIL_ATTR_RECIP, rcpt->address,
 133                   ATTR_TYPE_LONG, MAIL_ATTR_OFFSET, &rcpt->offset,
 134                   ATTR_TYPE_STR, MAIL_ATTR_DSN_ORCPT, rcpt->dsn_orcpt,
 135                   ATTR_TYPE_INT, MAIL_ATTR_DSN_NOTIFY, &rcpt->dsn_notify,
 136                   ATTR_TYPE_END);
 137     return (ret == 5 ? 1 : -1);
 138 }