mdw@git.distorted.org.uk Git - qmail/blob - hfield.c

   1 #include "hfield.h"
   2
   3 static char *(hname[]) = {
   4   "unknown-header"
   5 , "sender"
   6 , "from"
   7 , "reply-to"
   8 , "to"
   9 , "cc"
  10 , "bcc"
  11 , "date"
  12 , "message-id"
  13 , "subject"
  14 , "resent-sender"
  15 , "resent-from"
  16 , "resent-reply-to"
  17 , "resent-to"
  18 , "resent-cc"
  19 , "resent-bcc"
  20 , "resent-date"
  21 , "resent-message-id"
  22 , "return-receipt-to"
  23 , "errors-to"
  24 , "apparently-to"
  25 , "received"
  26 , "return-path"
  27 , "delivered-to"
  28 , "content-length"
  29 , "content-type"
  30 , "content-transfer-encoding"
  31 , "notice-requested-upon-delivery-to"
  32 , "mail-followup-to"
  33 , 0
  34 };
  35
  36 static int hmatch(s,len,t)
  37 char *s;
  38 int len;
  39 char *t;
  40 {
  41  int i;
  42  char ch;
  43
  44  for (i = 0;ch = t[i];++i)
  45   {
  46    if (i >= len) return 0;
  47    if (ch != s[i])
  48     {
  49      if (ch == '-') return 0;
  50      if (ch - 32 != s[i]) return 0;
  51     }
  52   }
  53  for (;;)
  54   {
  55    if (i >= len) return 0;
  56    ch = s[i];
  57    if (ch == ':') return 1;
  58    if ((ch != ' ') && (ch != '\t')) return 0;
  59    ++i;
  60   }
  61 }
  62
  63 int hfield_known(s,len)
  64 char *s;
  65 int len;
  66 {
  67  int i;
  68  char *t;
  69
  70  for (i = 1;t = hname[i];++i)
  71    if (hmatch(s,len,t))
  72      return i;
  73  return 0;
  74 }
  75
  76 int hfield_valid(s,len)
  77 char *s;
  78 int len;
  79 {
  80  int i;
  81  int j;
  82  char ch;
  83
  84  for (j = 0;j < len;++j)
  85    if (s[j] == ':')
  86      break;
  87  if (j >= len) return 0;
  88  while (j)
  89   {
  90    ch = s[j - 1];
  91    if ((ch != ' ') && (ch != '\t'))
  92      break;
  93    --j;
  94   }
  95  if (!j) return 0;
  96
  97  for (i = 0;i < j;++i)
  98   {
  99    ch = s[i];
 100    if (ch <= 32) return 0;
 101    if (ch >= 127) return 0;
 102   }
 103  return 1;
 104 }
 105
 106 unsigned int hfield_skipname(s,len)
 107 char *s;
 108 int len;
 109 {
 110  int i;
 111  char ch;
 112
 113  for (i = 0;i < len;++i)
 114    if (s[i] == ':')
 115      break;
 116  if (i < len) ++i;
 117  while (i < len)
 118   {
 119    ch = s[i];
 120    if ((ch != '\t') && (ch != '\n') && (ch != '\r') && (ch != ' '))
 121      break;
 122    ++i;
 123   }
 124  return i;
 125 }