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

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      ehlo_mask 3
   6 /* SUMMARY
   7 /*      map EHLO keywords to bit mask
   8 /* SYNOPSIS
   9 /*      #include <ehlo_mask.h>
  10 /*
  11 /*      #define EHLO_MASK_8BITMIME      (1<<0)
  12 /*      #define EHLO_MASK_PIPELINING    (1<<1)
  13 /*      #define EHLO_MASK_SIZE          (1<<2)
  14 /*      #define EHLO_MASK_VRFY          (1<<3)
  15 /*      #define EHLO_MASK_ETRN          (1<<4)
  16 /*      #define EHLO_MASK_AUTH          (1<<5)
  17 /*      #define EHLO_MASK_VERP          (1<<6)
  18 /*      #define EHLO_MASK_STARTTLS      (1<<7)
  19 /*      #define EHLO_MASK_XCLIENT       (1<<8)
  20 /*      #define EHLO_MASK_XFORWARD      (1<<9)
  21 /*      #define EHLO_MASK_ENHANCEDSTATUSCODES   (1<<10)
  22 /*      #define EHLO_MASK_DSN           (1<<11)
  23 /*      #define EHLO_MASK_SILENT        (1<<15)
  24 /*
  25 /*      int     ehlo_mask(keyword_list)
  26 /*      const char *keyword_list;
  27 /*
  28 /*      const char *str_ehlo_mask(bitmask)
  29 /*      int     bitmask;
  30 /* DESCRIPTION
  31 /*      ehlo_mask() computes the bit-wise OR of the masks that correspond
  32 /*      to the names listed in the \fIkeyword_list\fR argument, separated by
  33 /*      comma and/or whitespace characters. Undefined names are silently
  34 /*      ignored.
  35 /*
  36 /*      str_ehlo_mask() translates a mask into its equivalent names.
  37 /*      The result is written to a static buffer that is overwritten
  38 /*      upon each call. Undefined bits cause a fatal run-time error.
  39 /* DIAGNOSTICS
  40 /*      Fatal: str_ehlo_mask() found an undefined bit.
  41 /* LICENSE
  42 /* .ad
  43 /* .fi
  44 /*      The Secure Mailer license must be distributed with this software.
  45 /* AUTHOR(S)
  46 /*      Wietse Venema
  47 /*      IBM T.J. Watson Research
  48 /*      P.O. Box 704
  49 /*      Yorktown Heights, NY 10598, USA
  50 /*--*/
  51
  52 /* System library.*/
  53
  54 #include <sys_defs.h>
  55
  56 /* Utility library. */
  57
  58 #include <name_mask.h>
  59
  60 /* Global library. */
  61
  62 #include <ehlo_mask.h>
  63
  64  /*
  65   * The lookup table.
  66   */
  67 static const NAME_MASK ehlo_mask_table[] = {
  68     "8BITMIME", EHLO_MASK_8BITMIME,
  69     "AUTH", EHLO_MASK_AUTH,
  70     "ETRN", EHLO_MASK_ETRN,
  71     "PIPELINING", EHLO_MASK_PIPELINING,
  72     "SIZE", EHLO_MASK_SIZE,
  73     "VERP", EHLO_MASK_VERP,
  74     "VRFY", EHLO_MASK_VRFY,
  75     "XCLIENT", EHLO_MASK_XCLIENT,
  76     "XFORWARD", EHLO_MASK_XFORWARD,
  77     "STARTTLS", EHLO_MASK_STARTTLS,
  78     "ENHANCEDSTATUSCODES", EHLO_MASK_ENHANCEDSTATUSCODES,
  79     "DSN", EHLO_MASK_DSN,
  80     "SILENT-DISCARD", EHLO_MASK_SILENT, /* XXX In-band signaling */
  81     0,
  82 };
  83
  84 /* ehlo_mask - string to bit mask */
  85
  86 int     ehlo_mask(const char *mask_str)
  87 {
  88
  89     /*
  90      * We allow "STARTTLS" besides "starttls, because EHLO keywords are often
  91      * spelled in uppercase. We ignore non-existent EHLO keywords so people
  92      * can switch between Postfix versions without trouble.
  93      */
  94     return (name_mask_opt("ehlo string mask", ehlo_mask_table,
  95                           mask_str, NAME_MASK_ANY_CASE));
  96 }
  97
  98 /* str_ehlo_mask - mask to string */
  99
 100 const char *str_ehlo_mask(int mask_bits)
 101 {
 102
 103     /*
 104      * We don't allow non-existent bits. Doing so makes no sense at this
 105      * time.
 106      */
 107     return (str_name_mask("ehlo bitmask", ehlo_mask_table, mask_bits));
 108 }
 109
 110 #ifdef TEST
 111
 112  /*
 113   * Stand-alone test program.
 114   */
 115 #include <stdlib.h>
 116 #include <vstream.h>
 117 #include <vstring.h>
 118 #include <vstring_vstream.h>
 119
 120 int     main(int unused_argc, char **unused_argv)
 121 {
 122     int     mask_bits;
 123     VSTRING *buf = vstring_alloc(1);
 124     const char *mask_string;
 125
 126     while (vstring_get_nonl(buf, VSTREAM_IN) != VSTREAM_EOF) {
 127         mask_bits = ehlo_mask(vstring_str(buf));
 128         mask_string = str_ehlo_mask(mask_bits);
 129         vstream_printf("%s -> 0x%x -> %s\n", vstring_str(buf), mask_bits,
 130                        mask_string);
 131         vstream_fflush(VSTREAM_OUT);
 132     }
 133     vstring_free(buf);
 134     exit(0);
 135 }
 136
 137 #endif