add missing files

4 files changed, 1806 insertions, 0 deletions

diff --git a/extras/filters/filter-rspamd/json.c b/extras/filters/filter-rspamd/json.c
new file mode 100644
index 0000000..ea975e8
--- /dev/null
+++ b/extras/filters/filter-rspamd/json.c
@@ -0,0 +1,1011 @@
+/* vim: set et ts=3 sw=3 sts=3 ft=c:
+ *
+ * Copyright (C) 2012, 2013, 2014 James McLaughlin et al.  All rights reserved.
+ * https://github.com/udp/json-parser
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "json.h"
+
+#ifdef _MSC_VER
+   #ifndef _CRT_SECURE_NO_WARNINGS
+      #define _CRT_SECURE_NO_WARNINGS
+   #endif
+#endif
+
+const struct _json_value json_value_none;
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <math.h>
+
+typedef unsigned int json_uchar;
+
+static unsigned char hex_value (json_char c)
+{
+   if (isdigit(c))
+      return c - '0';
+
+   switch (c) {
+      case 'a': case 'A': return 0x0A;
+      case 'b': case 'B': return 0x0B;
+      case 'c': case 'C': return 0x0C;
+      case 'd': case 'D': return 0x0D;
+      case 'e': case 'E': return 0x0E;
+      case 'f': case 'F': return 0x0F;
+      default: return 0xFF;
+   }
+}
+
+typedef struct
+{
+   unsigned long used_memory;
+
+   unsigned int uint_max;
+   unsigned long ulong_max;
+
+   json_settings settings;
+   int first_pass;
+
+   const json_char * ptr;
+   unsigned int cur_line, cur_col;
+
+} json_state;
+
+static void * default_alloc (size_t size, int zero, void * user_data)
+{
+   return zero ? calloc (1, size) : malloc (size);
+}
+
+static void default_free (void * ptr, void * user_data)
+{
+   free (ptr);
+}
+
+static void * json_alloc (json_state * state, unsigned long size, int zero)
+{
+   if ((state->ulong_max - state->used_memory) < size)
+      return 0;
+
+   if (state->settings.max_memory
+         && (state->used_memory += size) > state->settings.max_memory)
+   {
+      return 0;
+   }
+
+   return state->settings.mem_alloc (size, zero, state->settings.user_data);
+}
+
+static int new_value (json_state * state,
+                      json_value ** top, json_value ** root, json_value ** alloc,
+                      json_type type)
+{
+   json_value * value;
+   int values_size;
+
+   if (!state->first_pass)
+   {
+      value = *top = *alloc;
+      *alloc = (*alloc)->_reserved.next_alloc;
+
+      if (!*root)
+         *root = value;
+
+      switch (value->type)
+      {
+         case json_array:
+
+            if (value->u.array.length == 0)
+               break;
+
+            if (! (value->u.array.values = (json_value **) json_alloc
+               (state, value->u.array.length * sizeof (json_value *), 0)) )
+            {
+               return 0;
+            }
+
+            value->u.array.length = 0;
+            break;
+
+         case json_object:
+
+            if (value->u.object.length == 0)
+               break;
+
+            values_size = sizeof (*value->u.object.values) * value->u.object.length;
+
+            if (! (value->u.object.values = (json_object_entry *) json_alloc
+                  (state, values_size + ((unsigned long) value->u.object.values), 0)) )
+            {
+               return 0;
+            }
+
+            value->_reserved.object_mem = (*(char **) &value->u.object.values) + values_size;
+
+            value->u.object.length = 0;
+            break;
+
+         case json_string:
+
+            if (! (value->u.string.ptr = (json_char *) json_alloc
+               (state, (value->u.string.length + 1) * sizeof (json_char), 0)) )
+            {
+               return 0;
+            }
+
+            value->u.string.length = 0;
+            break;
+
+         default:
+            break;
+      };
+
+      return 1;
+   }
+
+   if (! (value = (json_value *) json_alloc
+         (state, sizeof (json_value) + state->settings.value_extra, 1)))
+   {
+      return 0;
+   }
+
+   if (!*root)
+      *root = value;
+
+   value->type = type;
+   value->parent = *top;
+
+   #ifdef JSON_TRACK_SOURCE
+      value->line = state->cur_line;
+      value->col = state->cur_col;
+   #endif
+
+   if (*alloc)
+      (*alloc)->_reserved.next_alloc = value;
+
+   *alloc = *top = value;
+
+   return 1;
+}
+
+#define whitespace \
+   case '\n': ++ state.cur_line;  state.cur_col = 0; \
+   case ' ': case '\t': case '\r'
+
+#define string_add(b)  \
+   do { if (!state.first_pass) string [string_length] = b;  ++ string_length; } while (0);
+
+#define line_and_col \
+   state.cur_line, state.cur_col
+
+static const long
+   flag_next             = 1 << 0,
+   flag_reproc           = 1 << 1,
+   flag_need_comma       = 1 << 2,
+   flag_seek_value       = 1 << 3, 
+   flag_escaped          = 1 << 4,
+   flag_string           = 1 << 5,
+   flag_need_colon       = 1 << 6,
+   flag_done             = 1 << 7,
+   flag_num_negative     = 1 << 8,
+   flag_num_zero         = 1 << 9,
+   flag_num_e            = 1 << 10,
+   flag_num_e_got_sign   = 1 << 11,
+   flag_num_e_negative   = 1 << 12,
+   flag_line_comment     = 1 << 13,
+   flag_block_comment    = 1 << 14;
+
+json_value * json_parse_ex (json_settings * settings,
+                            const json_char * json,
+                            size_t length,
+                            char * error_buf)
+{
+   json_char error [json_error_max];
+   const json_char * end;
+   json_value * top, * root, * alloc = 0;
+   json_state state = { 0 };
+   long flags;
+   long num_digits = 0, num_e = 0;
+   json_int_t num_fraction = 0;
+
+   /* Skip UTF-8 BOM
+    */
+   if (length >= 3 && ((unsigned char) json [0]) == 0xEF
+                   && ((unsigned char) json [1]) == 0xBB
+                   && ((unsigned char) json [2]) == 0xBF)
+   {
+      json += 3;
+      length -= 3;
+   }
+
+   error[0] = '\0';
+   end = (json + length);
+
+   memcpy (&state.settings, settings, sizeof (json_settings));
+
+   if (!state.settings.mem_alloc)
+      state.settings.mem_alloc = default_alloc;
+
+   if (!state.settings.mem_free)
+      state.settings.mem_free = default_free;
+
+   memset (&state.uint_max, 0xFF, sizeof (state.uint_max));
+   memset (&state.ulong_max, 0xFF, sizeof (state.ulong_max));
+
+   state.uint_max -= 8; /* limit of how much can be added before next check */
+   state.ulong_max -= 8;
+
+   for (state.first_pass = 1; state.first_pass >= 0; -- state.first_pass)
+   {
+      json_uchar uchar;
+      unsigned char uc_b1, uc_b2, uc_b3, uc_b4;
+      json_char * string = 0;
+      unsigned int string_length = 0;
+
+      top = root = 0;
+      flags = flag_seek_value;
+
+      state.cur_line = 1;
+
+      for (state.ptr = json ;; ++ state.ptr)
+      {
+         json_char b = (state.ptr == end ? 0 : *state.ptr);
+         
+         if (flags & flag_string)
+         {
+            if (!b)
+            {  sprintf (error, "Unexpected EOF in string (at %d:%d)", line_and_col);
+               goto e_failed;
+            }
+
+            if (string_length > state.uint_max)
+               goto e_overflow;
+
+            if (flags & flag_escaped)
+            {
+               flags &= ~ flag_escaped;
+
+               switch (b)
+               {
+                  case 'b':  string_add ('\b');  break;
+                  case 'f':  string_add ('\f');  break;
+                  case 'n':  string_add ('\n');  break;
+                  case 'r':  string_add ('\r');  break;
+                  case 't':  string_add ('\t');  break;
+                  case 'u':
+
+                    if (end - state.ptr < 4 || 
+                        (uc_b1 = hex_value (*++ state.ptr)) == 0xFF ||
+                        (uc_b2 = hex_value (*++ state.ptr)) == 0xFF ||
+                        (uc_b3 = hex_value (*++ state.ptr)) == 0xFF ||
+                        (uc_b4 = hex_value (*++ state.ptr)) == 0xFF)
+                    {
+                        sprintf (error, "Invalid character value `%c` (at %d:%d)", b, line_and_col);
+                        goto e_failed;
+                    }
+
+                    uc_b1 = (uc_b1 << 4) | uc_b2;
+                    uc_b2 = (uc_b3 << 4) | uc_b4;
+                    uchar = (uc_b1 << 8) | uc_b2;
+
+                    if ((uchar & 0xF800) == 0xD800) {
+                        json_uchar uchar2;
+                        
+                        if (end - state.ptr < 6 || (*++ state.ptr) != '\\' || (*++ state.ptr) != 'u' ||
+                            (uc_b1 = hex_value (*++ state.ptr)) == 0xFF ||
+                            (uc_b2 = hex_value (*++ state.ptr)) == 0xFF ||
+                            (uc_b3 = hex_value (*++ state.ptr)) == 0xFF ||
+                            (uc_b4 = hex_value (*++ state.ptr)) == 0xFF)
+                        {
+                            sprintf (error, "Invalid character value `%c` (at %d:%d)", b, line_and_col);
+                            goto e_failed;
+                        }
+
+                        uc_b1 = (uc_b1 << 4) | uc_b2;
+                        uc_b2 = (uc_b3 << 4) | uc_b4;
+                        uchar2 = (uc_b1 << 8) | uc_b2;
+                        
+                        uchar = 0x010000 | ((uchar & 0x3FF) << 10) | (uchar2 & 0x3FF);
+                    }
+
+                    if (sizeof (json_char) >= sizeof (json_uchar) || (uchar <= 0x7F))
+                    {
+                       string_add ((json_char) uchar);
+                       break;
+                    }
+
+                    if (uchar <= 0x7FF)
+                    {
+                        if (state.first_pass)
+                           string_length += 2;
+                        else
+                        {  string [string_length ++] = 0xC0 | (uchar >> 6);
+                           string [string_length ++] = 0x80 | (uchar & 0x3F);
+                        }
+
+                        break;
+                    }
+
+                    if (uchar <= 0xFFFF) {
+                        if (state.first_pass)
+                           string_length += 3;
+                        else
+                        {  string [string_length ++] = 0xE0 | (uchar >> 12);
+                           string [string_length ++] = 0x80 | ((uchar >> 6) & 0x3F);
+                           string [string_length ++] = 0x80 | (uchar & 0x3F);
+                        }
+                        
+                        break;
+                    }
+
+                    if (state.first_pass)
+                       string_length += 4;
+                    else
+                    {  string [string_length ++] = 0xF0 | (uchar >> 18);
+                       string [string_length ++] = 0x80 | ((uchar >> 12) & 0x3F);
+                       string [string_length ++] = 0x80 | ((uchar >> 6) & 0x3F);
+                       string [string_length ++] = 0x80 | (uchar & 0x3F);
+                    }
+
+                    break;
+
+                  default:
+                     string_add (b);
+               };
+
+               continue;
+            }
+
+            if (b == '\\')
+            {
+               flags |= flag_escaped;
+               continue;
+            }
+
+            if (b == '"')
+            {
+               if (!state.first_pass)
+                  string [string_length] = 0;
+
+               flags &= ~ flag_string;
+               string = 0;
+
+               switch (top->type)
+               {
+                  case json_string:
+
+                     top->u.string.length = string_length;
+                     flags |= flag_next;
+
+                     break;
+
+                  case json_object:
+
+                     if (state.first_pass)
+                        (*(json_char **) &top->u.object.values) += string_length + 1;
+                     else
+                     {  
+                        top->u.object.values [top->u.object.length].name
+                           = (json_char *) top->_reserved.object_mem;
+
+                        top->u.object.values [top->u.object.length].name_length
+                           = string_length;
+
+                        (*(json_char **) &top->_reserved.object_mem) += string_length + 1;
+                     }
+
+                     flags |= flag_seek_value | flag_need_colon;
+                     continue;
+
+                  default:
+                     break;
+               };
+            }
+            else
+            {
+               string_add (b);
+               continue;
+            }
+         }
+
+         if (state.settings.settings & json_enable_comments)
+         {
+            if (flags & (flag_line_comment | flag_block_comment))
+            {
+               if (flags & flag_line_comment)
+               {
+                  if (b == '\r' || b == '\n' || !b)
+                  {
+                     flags &= ~ flag_line_comment;
+                     -- state.ptr;  /* so null can be reproc'd */
+                  }
+
+                  continue;
+               }
+
+               if (flags & flag_block_comment)
+               {
+                  if (!b)
+                  {  sprintf (error, "%d:%d: Unexpected EOF in block comment", line_and_col);
+                     goto e_failed;
+                  }
+
+                  if (b == '*' && state.ptr < (end - 1) && state.ptr [1] == '/')
+                  {
+                     flags &= ~ flag_block_comment;
+                     ++ state.ptr;  /* skip closing sequence */
+                  }
+
+                  continue;
+               }
+            }
+            else if (b == '/')
+            {
+               if (! (flags & (flag_seek_value | flag_done)) && top->type != json_object)
+               {  sprintf (error, "%d:%d: Comment not allowed here", line_and_col);
+                  goto e_failed;
+               }
+
+               if (++ state.ptr == end)
+               {  sprintf (error, "%d:%d: EOF unexpected", line_and_col);
+                  goto e_failed;
+               }
+
+               switch (b = *state.ptr)
+               {
+                  case '/':
+                     flags |= flag_line_comment;
+                     continue;
+
+                  case '*':
+                     flags |= flag_block_comment;
+                     continue;
+
+                  default:
+                     sprintf (error, "%d:%d: Unexpected `%c` in comment opening sequence", line_and_col, b);
+                     goto e_failed;
+               };
+            }
+         }
+
+         if (flags & flag_done)
+         {
+            if (!b)
+               break;
+
+            switch (b)
+            {
+               whitespace:
+                  continue;
+
+               default:
+
+                  sprintf (error, "%d:%d: Trailing garbage: `%c`",
+                           state.cur_line, state.cur_col, b);
+
+                  goto e_failed;
+            };
+         }
+
+         if (flags & flag_seek_value)
+         {
+            switch (b)
+            {
+               whitespace:
+                  continue;
+
+               case ']':
+
+                  if (top && top->type == json_array)
+                     flags = (flags & ~ (flag_need_comma | flag_seek_value)) | flag_next;
+                  else
+                  {  sprintf (error, "%d:%d: Unexpected ]", line_and_col);
+                     goto e_failed;
+                  }
+
+                  break;
+
+               default:
+
+                  if (flags & flag_need_comma)
+                  {
+                     if (b == ',')
+                     {  flags &= ~ flag_need_comma;
+                        continue;
+                     }
+                     else
+                     {
+                        sprintf (error, "%d:%d: Expected , before %c",
+                                 state.cur_line, state.cur_col, b);
+
+                        goto e_failed;
+                     }
+                  }
+
+                  if (flags & flag_need_colon)
+                  {
+                     if (b == ':')
+                     {  flags &= ~ flag_need_colon;
+                        continue;
+                     }
+                     else
+                     { 
+                        sprintf (error, "%d:%d: Expected : before %c",
+                                 state.cur_line, state.cur_col, b);
+
+                        goto e_failed;
+                     }
+                  }
+
+                  flags &= ~ flag_seek_value;
+
+                  switch (b)
+                  {
+                     case '{':
+
+                        if (!new_value (&state, &top, &root, &alloc, json_object))
+                           goto e_alloc_failure;
+
+                        continue;
+
+                     case '[':
+
+                        if (!new_value (&state, &top, &root, &alloc, json_array))
+                           goto e_alloc_failure;
+
+                        flags |= flag_seek_value;
+                        continue;
+
+                     case '"':
+
+                        if (!new_value (&state, &top, &root, &alloc, json_string))
+                           goto e_alloc_failure;
+
+                        flags |= flag_string;
+
+                        string = top->u.string.ptr;
+                        string_length = 0;
+
+                        continue;
+
+                     case 't':
+
+                        if ((end - state.ptr) < 3 || *(++ state.ptr) != 'r' ||
+                            *(++ state.ptr) != 'u' || *(++ state.ptr) != 'e')
+                        {
+                           goto e_unknown_value;
+                        }
+
+                        if (!new_value (&state, &top, &root, &alloc, json_boolean))
+                           goto e_alloc_failure;
+
+                        top->u.boolean = 1;
+
+                        flags |= flag_next;
+                        break;
+
+                     case 'f':
+
+                        if ((end - state.ptr) < 4 || *(++ state.ptr) != 'a' ||
+                            *(++ state.ptr) != 'l' || *(++ state.ptr) != 's' ||
+                            *(++ state.ptr) != 'e')
+                        {
+                           goto e_unknown_value;
+                        }
+
+                        if (!new_value (&state, &top, &root, &alloc, json_boolean))
+                           goto e_alloc_failure;
+
+                        flags |= flag_next;
+                        break;
+
+                     case 'n':
+
+                        if ((end - state.ptr) < 3 || *(++ state.ptr) != 'u' ||
+                            *(++ state.ptr) != 'l' || *(++ state.ptr) != 'l')
+                        {
+                           goto e_unknown_value;
+                        }
+
+                        if (!new_value (&state, &top, &root, &alloc, json_null))
+                           goto e_alloc_failure;
+
+                        flags |= flag_next;
+                        break;
+
+                     default:
+
+                        if (isdigit (b) || b == '-')
+                        {
+                           if (!new_value (&state, &top, &root, &alloc, json_integer))
+                              goto e_alloc_failure;
+
+                           if (!state.first_pass)
+                           {
+                              while (isdigit (b) || b == '+' || b == '-'
+                                        || b == 'e' || b == 'E' || b == '.')
+                              {
+                                 if ( (++ state.ptr) == end)
+                                 {
+                                    b = 0;
+                                    break;
+                                 }
+
+                                 b = *state.ptr;
+                              }
+
+                              flags |= flag_next | flag_reproc;
+                              break;
+                           }
+
+                           flags &= ~ (flag_num_negative | flag_num_e |
+                                        flag_num_e_got_sign | flag_num_e_negative |
+                                           flag_num_zero);
+
+                           num_digits = 0;
+                           num_fraction = 0;
+                           num_e = 0;
+
+                           if (b != '-')
+                           {
+                              flags |= flag_reproc;
+                              break;
+                           }
+
+                           flags |= flag_num_negative;
+                           continue;
+                        }
+                        else
+                        {  sprintf (error, "%d:%d: Unexpected %c when seeking value", line_and_col, b);
+                           goto e_failed;
+                        }
+                  };
+            };
+         }
+         else
+         {
+            switch (top->type)
+            {
+            case json_object:
+               
+               switch (b)
+               {
+                  whitespace:
+                     continue;
+
+                  case '"':
+
+                     if (flags & flag_need_comma)
+                     {  sprintf (error, "%d:%d: Expected , before \"", line_and_col);
+                        goto e_failed;
+                     }
+
+                     flags |= flag_string;
+
+                     string = (json_char *) top->_reserved.object_mem;
+                     string_length = 0;
+
+                     break;
+                  
+                  case '}':
+
+                     flags = (flags & ~ flag_need_comma) | flag_next;
+                     break;
+
+                  case ',':
+
+                     if (flags & flag_need_comma)
+                     {
+                        flags &= ~ flag_need_comma;
+                        break;
+                     }
+
+                  default:
+                     sprintf (error, "%d:%d: Unexpected `%c` in object", line_and_col, b);
+                     goto e_failed;
+               };
+
+               break;
+
+            case json_integer:
+            case json_double:
+
+               if (isdigit (b))
+               {
+                  ++ num_digits;
+
+                  if (top->type == json_integer || flags & flag_num_e)
+                  {
+                     if (! (flags & flag_num_e))
+                     {
+                        if (flags & flag_num_zero)
+                        {  sprintf (error, "%d:%d: Unexpected `0` before `%c`", line_and_col, b);
+                           goto e_failed;
+                        }
+
+                        if (num_digits == 1 && b == '0')
+                           flags |= flag_num_zero;
+                     }
+                     else
+                     {
+                        flags |= flag_num_e_got_sign;
+                        num_e = (num_e * 10) + (b - '0');
+                        continue;
+                     }
+
+                     top->u.integer = (top->u.integer * 10) + (b - '0');
+                     continue;
+                  }
+
+                  num_fraction = (num_fraction * 10) + (b - '0');
+                  continue;
+               }
+
+               if (b == '+' || b == '-')
+               {
+                  if ( (flags & flag_num_e) && !(flags & flag_num_e_got_sign))
+                  {
+                     flags |= flag_num_e_got_sign;
+
+                     if (b == '-')
+                        flags |= flag_num_e_negative;
+
+                     continue;
+                  }
+               }
+               else if (b == '.' && top->type == json_integer)
+               {
+                  if (!num_digits)
+                  {  sprintf (error, "%d:%d: Expected digit before `.`", line_and_col);
+                     goto e_failed;
+                  }
+
+                  top->type = json_double;
+                  top->u.dbl = (double) top->u.integer;
+
+                  num_digits = 0;
+                  continue;
+               }
+
+               if (! (flags & flag_num_e))
+               {
+                  if (top->type == json_double)
+                  {
+                     if (!num_digits)
+                     {  sprintf (error, "%d:%d: Expected digit after `.`", line_and_col);
+                        goto e_failed;
+                     }
+
+                     top->u.dbl += ((double) num_fraction) / (pow (10.0, (double) num_digits));
+                  }
+
+                  if (b == 'e' || b == 'E')
+                  {
+                     flags |= flag_num_e;
+
+                     if (top->type == json_integer)
+                     {
+                        top->type = json_double;
+                        top->u.dbl = (double) top->u.integer;
+                     }
+
+                     num_digits = 0;
+                     flags &= ~ flag_num_zero;
+
+                     continue;
+                  }
+               }
+               else
+               {
+                  if (!num_digits)
+                  {  sprintf (error, "%d:%d: Expected digit after `e`", line_and_col);
+                     goto e_failed;
+                  }
+
+                  top->u.dbl *= pow (10.0, (double)
+                      (flags & flag_num_e_negative ? - num_e : num_e));
+               }
+
+               if (flags & flag_num_negative)
+               {
+                  if (top->type == json_integer)
+                     top->u.integer = - top->u.integer;
+                  else
+                     top->u.dbl = - top->u.dbl;
+               }
+
+               flags |= flag_next | flag_reproc;
+               break;
+
+            default:
+               break;
+            };
+         }
+
+         if (flags & flag_reproc)
+         {
+            flags &= ~ flag_reproc;
+            -- state.ptr;
+         }
+
+         if (flags & flag_next)
+         {
+            flags = (flags & ~ flag_next) | flag_need_comma;
+
+            if (!top->parent)
+            {
+               /* root value done */
+
+               flags |= flag_done;
+               continue;
+            }
+
+            if (top->parent->type == json_array)
+               flags |= flag_seek_value;
+               
+            if (!state.first_pass)
+            {
+               json_value * parent = top->parent;
+
+               switch (parent->type)
+               {
+                  case json_object:
+
+                     parent->u.object.values
+                        [parent->u.object.length].value = top;
+
+                     break;
+
+                  case json_array:
+
+                     parent->u.array.values
+                           [parent->u.array.length] = top;
+
+                     break;
+
+                  default:
+                     break;
+               };
+            }
+
+            if ( (++ top->parent->u.array.length) > state.uint_max)
+               goto e_overflow;
+
+            top = top->parent;
+
+            continue;
+         }
+      }
+
+      alloc = root;
+   }
+
+   return root;
+
+e_unknown_value:
+
+   sprintf (error, "%d:%d: Unknown value", line_and_col);
+   goto e_failed;
+
+e_alloc_failure:
+
+   strlcpy (error, "Memory allocation failure", sizeof error);
+   goto e_failed;
+
+e_overflow:
+
+   sprintf (error, "%d:%d: Too long (caught overflow)", line_and_col);
+   goto e_failed;
+
+e_failed:
+
+   if (error_buf)
+   {
+      if (*error)
+	      strcpy (error_buf, error);
+      else
+	      strcpy (error_buf, "Unknown error");
+   }
+
+   if (state.first_pass)
+      alloc = root;
+
+   while (alloc)
+   {
+      top = alloc->_reserved.next_alloc;
+      state.settings.mem_free (alloc, state.settings.user_data);
+      alloc = top;
+   }
+
+   if (!state.first_pass)
+      json_value_free_ex (&state.settings, root);
+
+   return 0;
+}
+
+json_value * json_parse (const json_char * json, size_t length)
+{
+   json_settings settings = { 0 };
+   return json_parse_ex (&settings, json, length, 0);
+}
+
+void json_value_free_ex (json_settings * settings, json_value * value)
+{
+   json_value * cur_value;
+
+   if (!value)
+      return;
+
+   value->parent = 0;
+
+   while (value)
+   {
+      switch (value->type)
+      {
+         case json_array:
+
+            if (!value->u.array.length)
+            {
+               settings->mem_free (value->u.array.values, settings->user_data);
+               break;
+            }
+
+            value = value->u.array.values [-- value->u.array.length];
+            continue;
+
+         case json_object:
+
+            if (!value->u.object.length)
+            {
+               settings->mem_free (value->u.object.values, settings->user_data);
+               break;
+            }
+
+            value = value->u.object.values [-- value->u.object.length].value;
+            continue;
+
+         case json_string:
+
+            settings->mem_free (value->u.string.ptr, settings->user_data);
+            break;
+
+         default:
+            break;
+      };
+
+      cur_value = value;
+      value = value->parent;
+      settings->mem_free (cur_value, settings->user_data);
+   }
+}
+
+void json_value_free (json_value * value)
+{
+   json_settings settings = { 0 };
+   settings.mem_free = default_free;
+   json_value_free_ex (&settings, value);
+}
+
diff --git a/extras/filters/filter-rspamd/json.h b/extras/filters/filter-rspamd/json.h
new file mode 100644
index 0000000..f6549ec
--- /dev/null
+++ b/extras/filters/filter-rspamd/json.h
@@ -0,0 +1,283 @@
+
+/* vim: set et ts=3 sw=3 sts=3 ft=c:
+ *
+ * Copyright (C) 2012, 2013, 2014 James McLaughlin et al.  All rights reserved.
+ * https://github.com/udp/json-parser
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _JSON_H
+#define _JSON_H
+
+#ifndef json_char
+   #define json_char char
+#endif
+
+#ifndef json_int_t
+   #ifndef _MSC_VER
+      #include <inttypes.h>
+      #define json_int_t int64_t
+   #else
+      #define json_int_t __int64
+   #endif
+#endif
+
+#include <stdlib.h>
+
+#ifdef __cplusplus
+
+   #include <string.h>
+
+   extern "C"
+   {
+
+#endif
+
+typedef struct
+{
+   unsigned long max_memory;
+   int settings;
+
+   /* Custom allocator support (leave null to use malloc/free)
+    */
+
+   void * (* mem_alloc) (size_t, int zero, void * user_data);
+   void (* mem_free) (void *, void * user_data);
+
+   void * user_data;  /* will be passed to mem_alloc and mem_free */
+
+   size_t value_extra;  /* how much extra space to allocate for values? */
+
+} json_settings;
+
+#define json_enable_comments  0x01
+
+typedef enum
+{
+   json_none,
+   json_object,
+   json_array,
+   json_integer,
+   json_double,
+   json_string,
+   json_boolean,
+   json_null
+
+} json_type;
+
+extern const struct _json_value json_value_none;
+       
+typedef struct _json_object_entry
+{
+    json_char * name;
+    unsigned int name_length;
+    
+    struct _json_value * value;
+    
+} json_object_entry;
+
+typedef struct _json_value
+{
+   struct _json_value * parent;
+
+   json_type type;
+
+   union
+   {
+      int boolean;
+      json_int_t integer;
+      double dbl;
+
+      struct
+      {
+         unsigned int length;
+         json_char * ptr; /* null terminated */
+
+      } string;
+
+      struct
+      {
+         unsigned int length;
+
+         json_object_entry * values;
+
+         #if defined(__cplusplus) && __cplusplus >= 201103L
+         decltype(values) begin () const
+         {  return values;
+         }
+         decltype(values) end () const
+         {  return values + length;
+         }
+         #endif
+
+      } object;
+
+      struct
+      {
+         unsigned int length;
+         struct _json_value ** values;
+
+         #if defined(__cplusplus) && __cplusplus >= 201103L
+         decltype(values) begin () const
+         {  return values;
+         }
+         decltype(values) end () const
+         {  return values + length;
+         }
+         #endif
+
+      } array;
+
+   } u;
+
+   union
+   {
+      struct _json_value * next_alloc;
+      void * object_mem;
+
+   } _reserved;
+
+   #ifdef JSON_TRACK_SOURCE
+
+      /* Location of the value in the source JSON
+       */
+      unsigned int line, col;
+
+   #endif
+
+
+   /* Some C++ operator sugar */
+
+   #ifdef __cplusplus
+
+      public:
+
+         inline _json_value ()
+         {  memset (this, 0, sizeof (_json_value));
+         }
+
+         inline const struct _json_value &operator [] (int index) const
+         {
+            if (type != json_array || index < 0
+                     || ((unsigned int) index) >= u.array.length)
+            {
+               return json_value_none;
+            }
+
+            return *u.array.values [index];
+         }
+
+         inline const struct _json_value &operator [] (const char * index) const
+         { 
+            if (type != json_object)
+               return json_value_none;
+
+            for (unsigned int i = 0; i < u.object.length; ++ i)
+               if (!strcmp (u.object.values [i].name, index))
+                  return *u.object.values [i].value;
+
+            return json_value_none;
+         }
+
+         inline operator const char * () const
+         {  
+            switch (type)
+            {
+               case json_string:
+                  return u.string.ptr;
+
+               default:
+                  return "";
+            };
+         }
+
+         inline operator json_int_t () const
+         {  
+            switch (type)
+            {
+               case json_integer:
+                  return u.integer;
+
+               case json_double:
+                  return (json_int_t) u.dbl;
+
+               default:
+                  return 0;
+            };
+         }
+
+         inline operator bool () const
+         {  
+            if (type != json_boolean)
+               return false;
+
+            return u.boolean != 0;
+         }
+
+         inline operator double () const
+         {  
+            switch (type)
+            {
+               case json_integer:
+                  return (double) u.integer;
+
+               case json_double:
+                  return u.dbl;
+
+               default:
+                  return 0;
+            };
+         }
+
+   #endif
+
+} json_value;
+       
+json_value * json_parse (const json_char * json,
+                         size_t length);
+
+#define json_error_max 128
+json_value * json_parse_ex (json_settings * settings,
+                            const json_char * json,
+                            size_t length,
+                            char * error);
+
+void json_value_free (json_value *);
+
+
+/* Not usually necessary, unless you used a custom mem_alloc and now want to
+ * use a custom mem_free.
+ */
+void json_value_free_ex (json_settings * settings,
+                         json_value *);
+
+
+#ifdef __cplusplus
+   } /* extern "C" */
+#endif
+
+#endif
+
+
diff --git a/extras/filters/filter-rspamd/rspamd.c b/extras/filters/filter-rspamd/rspamd.c
new file mode 100644
index 0000000..8f5c039
--- /dev/null
+++ b/extras/filters/filter-rspamd/rspamd.c
@@ -0,0 +1,435 @@
+/*
+ * Copyright (c) 2016 Gilles Chehade <gilles@poolp.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "smtpd-defines.h"
+#include "smtpd-api.h"
+#include "log.h"
+#include "iobuf.h"
+#include "ioev.h"
+
+#include "rfc2822.h"
+#include "rspamd.h"
+#include "json.h"
+
+struct sockaddr_storage	ss;
+
+/* XXX
+ * this needs to be handled differently, but lets focus on the filter for now
+ */
+void
+rspamd_resolve(const char *h, const char *p)
+{
+	struct addrinfo hints, *addresses, *ai;
+	int fd, r;
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = PF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_protocol = IPPROTO_TCP;
+	if ((r = getaddrinfo(h, p, &hints, &addresses)))
+		fatalx("resolve: getaddrinfo %s", gai_strerror(r));
+	for (ai = addresses; ai; ai = ai->ai_next) {
+		if ((fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol)) == -1)
+			continue;
+		if (connect(fd, ai->ai_addr, ai->ai_addrlen) == -1) {
+			close(fd);
+			continue;
+		}
+		close(fd);
+		memmove(&ss, ai->ai_addr, ai->ai_addrlen);
+		break;
+	}
+	freeaddrinfo(addresses);
+	if (!ai)
+		fatalx("resolve: failed");
+}
+
+static void
+headers_callback(const struct rfc2822_header *hdr, void *arg)
+{
+	struct session		*rs = arg;
+	struct rfc2822_line	*l;
+	char			 buffer[4096];
+	int			 i = 0;
+
+	log_debug("#######1");
+	TAILQ_FOREACH(l, &hdr->lines, next) {
+		if (i++ == 0) {
+			snprintf(buffer, sizeof buffer,  "%s:%s", hdr->name, l->buffer);
+			filter_api_writeln(rs->id, buffer);
+			continue;
+		}
+		filter_api_writeln(rs->id, l->buffer);
+	}
+}
+
+static void
+dataline_callback(const char *line, void *arg)
+{
+	struct session	*rs = arg;
+
+	log_debug("debug: STREAM BACK: [%s]", rs->tx.line);
+	filter_api_writeln(rs->id, rs->tx.line);
+}
+
+
+struct session *
+session_init(uint64_t id)
+{
+	struct session	*rs;
+
+	rs = xcalloc(1, sizeof *rs, "on_connect");
+	rs->id = id;
+	return rs;
+}
+
+void
+session_reset(struct session *rs)
+{
+	iobuf_clear(&rs->iobuf);
+	io_clear(&rs->io);
+
+	filter_api_datahold_close(rs->id);
+
+	free(rs->tx.from);
+	free(rs->tx.rcpt);
+
+	rs->tx.eom = 0;
+	rs->tx.error = 0;
+	rs->tx.from = NULL;
+	rs->tx.rcpt = NULL;
+}
+
+void
+session_free(struct session *rs)
+{
+	session_reset(rs);
+
+	free(rs->ip);
+	free(rs->hostname);
+	free(rs->helo);
+	free(rs);
+}
+
+int
+rspamd_connect(struct session *rs)
+{
+	iobuf_xinit(&rs->iobuf, LINE_MAX, LINE_MAX, "on_eom");
+	io_init(&rs->io, -1, rs, rspamd_io, &rs->iobuf);
+	if (io_connect(&rs->io, (struct sockaddr *)&ss, NULL) == -1)
+		return 0;
+	return 1;
+}
+
+void
+rspamd_disconnect(struct session *rs)
+{
+	iobuf_clear(&rs->iobuf);
+	io_clear(&rs->io);
+}
+
+void
+rspamd_connected(struct session *rs)
+{
+	filter_api_accept(rs->id);
+}
+
+void
+rspamd_error(struct session *rs)
+{
+	filter_api_reject_code(rs->id, FILTER_FAIL, 421, "temporary failure");
+	session_reset(rs);
+}
+
+void
+rspamd_send_query(struct session *rs)
+{
+	iobuf_xfqueue(&rs->iobuf, "io",
+	    "POST /check HTTP/1.0\r\n"
+	    "Transfer-Encoding: chunked\r\n"
+	    "Pass: all\r\n"
+	    "IP: %s\r\n"
+	    "Helo: %s\r\n"
+	    "Hostname: %s\r\n"
+	    "From: %s\r\n"
+	    "Rcpt: %s\r\n"
+	    "\r\n",
+	    rs->ip,
+	    rs->helo,
+	    rs->hostname,
+	    rs->tx.from,
+	    rs->tx.rcpt);
+	io_reload(&rs->io);
+}
+
+void
+rspamd_send_chunk(struct session *rs, const char *line)
+{
+	if (line)
+		iobuf_xfqueue(&rs->iobuf, "io", "%x\r\n%s\r\n\r\n",
+		    strlen(line)+2, line);
+	else {
+		iobuf_xfqueue(&rs->iobuf, "io", "0\r\n\r\n");
+		rs->tx.eom = 1;
+	}
+		
+	io_reload(&rs->io);
+}
+
+void
+rspamd_read_response(struct session *rs)
+{
+	char	       *line;
+
+	while ((line = iobuf_getline(&rs->iobuf, NULL)))
+		if (strlen(line) == 0)
+			rs->rspamd.eoh = 1;
+
+	if (rs->rspamd.eoh) {
+		if (iobuf_len(&rs->iobuf) != 0) {
+			rs->rspamd.body = xmemdup(iobuf_data(&rs->iobuf),
+			    iobuf_len(&rs->iobuf) + 1, "rspamd_read_response");
+			rs->rspamd.body[iobuf_len(&rs->iobuf)] = 0;
+		}
+	}
+	iobuf_normalize(&rs->iobuf);
+}
+
+int
+rspamd_parse_response(struct session *rs)
+{
+	json_value     *jv;
+	json_value     *def = NULL;
+	char	       *name;
+	json_value     *val;
+	size_t		i;
+	
+	jv = json_parse(rs->rspamd.body, strlen(rs->rspamd.body));
+	if (jv == NULL || jv->type != json_object)
+		goto fail;
+
+	for (i = 0; i < jv->u.object.length; ++i)
+		if (strcmp(jv->u.object.values[i].name, "default") == 0) {
+			def = jv->u.object.values[i].value;
+			break;
+		}
+	if (def == NULL)
+		goto fail;
+
+	for (i = 0; i < def->u.object.length; ++i) {
+		name = def->u.object.values[i].name;
+
+		if (strcmp(name, "is_spam") == 0) {
+			val = def->u.object.values[i].value;
+			if (val->type != json_boolean)
+				goto fail;
+			rs->rspamd.is_spam = val->u.boolean;
+		}
+		else if (strcmp(name, "is_skipped") == 0) {
+			val = def->u.object.values[i].value;
+			if (val->type != json_boolean)
+				goto fail;
+			rs->rspamd.is_skipped = val->u.boolean;
+		}
+		else if (strcmp(name, "score") == 0) {
+			val = def->u.object.values[i].value;
+			if (val->type != json_double)
+				goto fail;
+			rs->rspamd.score = val->u.dbl;
+		}
+		else if (strcmp(name, "required_score") == 0) {
+			val = def->u.object.values[i].value;
+			if (val->type != json_double)
+				goto fail;
+			rs->rspamd.required_score = val->u.dbl;
+		}
+		else if (strcmp(name, "action") == 0) {
+			val = def->u.object.values[i].value;
+			if (val->type != json_string)
+				goto fail;
+			log_debug("[%.*s]", val->u.string.length, val->u.string.ptr);
+			if (strncmp(val->u.string.ptr, "no action",
+				val->u.string.length) == 0)
+				rs->rspamd.action = NO_ACTION;
+			else if (strncmp(val->u.string.ptr, "greylist",
+				val->u.string.length) == 0)
+				rs->rspamd.action = GREYLIST;
+			else if (strncmp(val->u.string.ptr, "add header",
+				val->u.string.length) == 0)
+				rs->rspamd.action = ADD_HEADER;
+			else if (strncmp(val->u.string.ptr, "rewrite subject",
+				val->u.string.length) == 0)
+				rs->rspamd.action = REWRITE_SUBJECT;
+			else if (strncmp(val->u.string.ptr, "soft reject",
+				val->u.string.length) == 0)
+				rs->rspamd.action = SOFT_REJECT;
+			else if (strncmp(val->u.string.ptr, "reject",
+				val->u.string.length) == 0)
+				rs->rspamd.action = REJECT;
+		}
+		else if (strcmp(name, "subject") == 0) {
+			val = def->u.object.values[i].value;
+			if (val->type != json_string)
+				goto fail;
+			rs->rspamd.subject = xmemdup(val->u.string.ptr,
+			    val->u.string.length, "rspamd_parse_result");
+		}
+	}
+
+	json_value_free(jv);
+	return 1;
+
+fail:
+	json_value_free(jv);
+	return -1;
+}
+
+void
+rspamd_spam_header(const char *header, void *arg)
+{
+	struct session *rs = arg;
+	char		buffer[4096];
+
+	snprintf(buffer, sizeof buffer, "X-Spam-Flag: %s",
+	    rs->rspamd.is_spam ? "Yes" : "No");
+	filter_api_writeln(rs->id, buffer);
+
+	snprintf(buffer, sizeof buffer, "X-Spam-Score: %.2f",
+	    rs->rspamd.score);
+	filter_api_writeln(rs->id, buffer);
+
+	snprintf(buffer, sizeof buffer, "X-Spam-Status: %s, score=%.2f, required=%.2f",
+	    rs->rspamd.is_spam ? "Yes" : "No",
+	    rs->rspamd.score,
+	    rs->rspamd.required_score);
+	filter_api_writeln(rs->id, buffer);
+}
+
+int
+rspamd_proceed(struct session *rs)
+{
+	rfc2822_parser_init(&rs->tx.rfc2822_parser);
+	rfc2822_parser_reset(&rs->tx.rfc2822_parser);
+	rfc2822_header_default_callback(&rs->tx.rfc2822_parser,
+	    headers_callback, rs);
+	rfc2822_body_callback(&rs->tx.rfc2822_parser,
+	    dataline_callback, rs);
+
+	switch (rs->rspamd.action) {
+	case NO_ACTION:
+		return 1;
+
+	case SOFT_REJECT:
+		filter_api_reject_code(rs->id, FILTER_FAIL, 421,
+		    "message content rejected");
+		return 0;
+
+	case GREYLIST:
+		filter_api_reject_code(rs->id, FILTER_FAIL, 421,
+		    "greylisted");
+		return 0;
+
+	case REJECT:
+		filter_api_reject_code(rs->id, FILTER_FAIL, 550,
+		    "message content rejected");
+		return 0;
+
+	case ADD_HEADER:
+		/* insert header */
+		log_debug("ADDING X-SPAM");
+		rfc2822_missing_header_callback(&rs->tx.rfc2822_parser,
+		    "x-spam", rspamd_spam_header, rs);
+		return 1;
+
+	case REWRITE_SUBJECT:
+		/* rewrite subject */
+		return 1;
+	}
+
+	
+	
+}
+
+
+void
+rspamd_io(struct io *io, int evt)
+{
+	struct session *rs = io->arg;
+	
+	switch (evt) {
+	case IO_CONNECTED:
+		rspamd_connected(rs);
+		rspamd_send_query(rs);
+		io_set_write(io);
+		break;
+
+	case IO_LOWAT:
+		/* we've hit EOM and no more data, toggle to read */
+		if (rs->tx.eom)
+			io_set_read(io);
+		break;
+
+	case IO_DATAIN:
+		/* accumulate reply */
+		rspamd_read_response(rs);
+		break;
+
+	case IO_DISCONNECTED:
+		rspamd_disconnect(rs);
+
+		/* we're done with rspamd, if there was a local error
+		 * during transaction, reject now, else move forward.
+		 */
+		if (rs->tx.error) {
+			rspamd_error(rs);
+			break;
+		}
+		/* process rspamd reply and start processing datahold */
+		if (! rspamd_parse_response(rs)) {
+			rspamd_error(rs);
+			break;
+		}
+
+		if (! rspamd_proceed(rs))
+			break;
+		
+		filter_api_datahold_start(rs->id);
+		break;
+
+	case IO_TIMEOUT:
+	case IO_ERROR:
+	default:
+		//rspamd_error(rs);
+		break;
+	}
+	return;
+}
+
diff --git a/extras/filters/filter-rspamd/rspamd.h b/extras/filters/filter-rspamd/rspamd.h
new file mode 100644
index 0000000..d7446d2
--- /dev/null
+++ b/extras/filters/filter-rspamd/rspamd.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2016 Gilles Chehade <gilles@poolp.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "includes.h"
+
+#define RSPAMD_HOST "127.0.0.1"
+#define RSPAMD_PORT "11333"
+
+struct session {
+	uint64_t	id;
+
+	struct iobuf	iobuf;
+	struct io	io;
+	
+	char	       *ip;
+	char	       *hostname;
+	char	       *helo;
+
+	struct tx {
+		FILE   *fp;
+		char   *line;
+		int	error;
+		int	eom;
+
+		char   *from;
+		char   *rcpt;
+		struct rfc2822_parser	rfc2822_parser;
+	} tx;
+	
+	struct rspamd_response {
+		int	eoh;
+		char   *body;
+
+		int	is_spam;
+		int	is_skipped;
+		double	score;
+		double	required_score;
+		enum {
+			NO_ACTION,
+			GREYLIST,
+			ADD_HEADER,
+			REWRITE_SUBJECT,
+			SOFT_REJECT,
+			REJECT
+		} action;
+		char   *subject;
+	} rspamd;
+
+};
+
+struct session  *session_init(uint64_t);
+void		session_reset(struct session *);
+void		session_free(struct session *);
+
+int		rspamd_connect(struct session *);
+void		rspamd_connected(struct session *);
+void		rspamd_error(struct session *);
+void		rspamd_io(struct io *, int);
+void		rspamd_send_query(struct session *);
+void		rspamd_send_chunk(struct session *, const char *);
+void		rspamd_read_response(struct session *);
+int		rspamd_parse_response(struct session *);
+
+