src/src/mime.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2004 */
   6 /* License: GPL */
   7
   8 #ifdef WITH_CONTENT_SCAN
   9
  10 #define MIME_MAX_HEADER_SIZE 8192
  11 #define MIME_MAX_LINE_LENGTH 32768
  12
  13 #define MBC_ATTACHMENT            0
  14 #define MBC_COVERLETTER_ONESHOT   1
  15 #define MBC_COVERLETTER_ALL       2
  16
  17 struct mime_boundary_context
  18 {
  19   struct mime_boundary_context *parent;
  20   unsigned char *boundary;
  21   int context;
  22 };
  23
  24 typedef struct mime_header {
  25   uschar *name;
  26   int    namelen;
  27   void   *value;
  28 } mime_header;
  29
  30 static mime_header mime_header_list[] = {
  31   { US"content-type:", 13, &mime_content_type },
  32   { US"content-disposition:", 20, &mime_content_disposition },
  33   { US"content-transfer-encoding:", 26, &mime_content_transfer_encoding },
  34   { US"content-id:", 11, &mime_content_id },
  35   { US"content-description:", 20 , &mime_content_description }
  36 };
  37
  38 static int mime_header_list_size = sizeof(mime_header_list)/sizeof(mime_header);
  39
  40
  41
  42 typedef struct mime_parameter {
  43   uschar *name;
  44   int    namelen;
  45   void   *value;
  46 } mime_parameter;
  47
  48 static mime_parameter mime_parameter_list[] = {
  49   { US"name=", 5, &mime_filename },
  50   { US"filename=", 9, &mime_filename },
  51   { US"charset=", 8, &mime_charset },
  52   { US"boundary=", 9, &mime_boundary }
  53 };
  54
  55 static int mime_parameter_list_size = sizeof(mime_parameter_list)/sizeof(mime_parameter);
  56
  57
  58 /* MIME Anomaly list */
  59 #define MIME_ANOMALY_BROKEN_BASE64    2, "Broken BASE64 encoding detected"
  60 #define MIME_ANOMALY_BROKEN_QP        1, "Broken Quoted-Printable encoding detected"
  61
  62
  63 /* BASE64 decoder matrix */
  64 static unsigned char mime_b64[256]={
  65 /*   0 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  66 /*  16 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  67 /*  32 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,   62,  128,  128,  128,   63,
  68 /*  48 */   52,   53,   54,   55,   56,   57,   58,   59,   60,   61,  128,  128,  128,  255,  128,  128,
  69 /*  64 */  128,    0,    1,    2,    3,    4,    5,    6,    7,    8,    9,   10,   11,   12,   13,   14,
  70 /*  80 */   15,   16,   17,   18,   19,   20,   21,   22,   23,   24,   25,  128,  128,  128,  128,  128,
  71 /*  96 */  128,   26,   27,   28,   29,   30,   31,   32,   33,   34,   35,   36,   37,   38,   39,   40,
  72 /* 112 */   41,   42,   43,   44,   45,   46,   47,   48,   49,   50,   51,  128,  128,  128,  128,  128,
  73 /* 128 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  74 /* 144 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  75 /* 160 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  76 /* 176 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  77 /* 192 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  78 /* 208 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  79 /* 224 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,
  80 /* 240 */  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128,  128
  81 };
  82
  83 #endif