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/*
* Copyright (c) 2009-2012, Vsevolod Stakhov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 AUTHOR ''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 AUTHOR 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 "lua_common.h"
#include "message.h"
#include "expressions.h"
#include "protocol.h"
#include "filter.h"
#include "dns.h"
#include "util.h"
#include "images.h"
#include "cfg_file.h"
#include "statfile.h"
#include "tokenizers/tokenizers.h"
#include "classifiers/classifiers.h"
#include "binlog.h"
#include "statfile_sync.h"
#include "diff.h"
/***
* @module rspamd_task
* This module provides routines for tasks manipulation in rspamd. Tasks usually
* represent messages being scanned, and this API provides access to such elements
* as headers, symbols, metrics and so on and so forth. Normally, task objects
* are passed to the lua callbacks allowing to check specific properties of messages
* and add the corresponding symbols to the scan's results.
@example
rspamd_config.DATE_IN_PAST = function(task)
if rspamd_config:get_api_version() >= 5 then
local dm = task:get_date{format = 'message', gmt = true}
local dt = task:get_date{format = 'connect', gmt = true}
-- A day
if dt - dm > 86400 then
return true
end
end
return false
end
*/
/* Task creation */
/***
* @function rspamd_task.create_empty()
* Creates new empty task object.
* @return {rspamd_task} task object
*/
LUA_FUNCTION_DEF (task, create_empty);
/***
* @function rspamd_task.create_from_buffer(input)
* Creates new task object and load its content from the string provided.
* @param {string} input string that contains MIME message
* @return {rspamd_task} task object
*/
LUA_FUNCTION_DEF (task, create_from_buffer);
/* Task methods */
LUA_FUNCTION_DEF (task, get_message);
LUA_FUNCTION_DEF (task, process_message);
/***
* @method task:get_cfg()
* Get configuration object for a task.
* @return {rspamd_config} (config.md)[configuration object] for the task
*/
LUA_FUNCTION_DEF (task, get_cfg);
LUA_FUNCTION_DEF (task, set_cfg);
LUA_FUNCTION_DEF (task, destroy);
/***
* @method task:get_mempool()
* Returns memory pool valid for a lifetime of task. It is used internally by
* many rspamd routines.
* @return {rspamd_mempool} memory pool object
*/
LUA_FUNCTION_DEF (task, get_mempool);
/***
* @method task:get_session()
* Returns asynchronous session object that is used by many rspamd asynchronous
* utilities internally.
* @return {rspamd_session} session object
*/
LUA_FUNCTION_DEF (task, get_session);
/***
* @method task:get_ev_base()
* Return asynchronous event base for using in callbacks and resolver.
* @return {rspamd_ev_base} event base
*/
LUA_FUNCTION_DEF (task, get_ev_base);
/***
* @method task:insert_result(symbol, weigth[, option1, ...])
* Insert specific symbol to the tasks scanning results assigning the initial
* weight to it.
* @param {string} symbol symbol to insert
* @param {number} weight initial weight (this weight is multiplied by the metric weight)
* @param {string} options list of optional options attached to a symbol inserted
@example
local function cb(task)
if task:get_header('Some header') then
task:insert_result('SOME_HEADER', 1.0, 'Got some header')
end
end
*/
LUA_FUNCTION_DEF (task, insert_result);
/***
* @method task:set_pre_results(action, description)
* Sets pre-result for a task. It is used in pre-filters to specify early results
* of the task scanned. If a pre-filter sets some result, then further processing
* may be skipped. For selecting action it is possible to use global table
* `rspamd_actions` or a string value:
*
* - `reject`: reject message permanently
* - `add header`: add spam header
* - `rewrite subject`: rewrite subject to spam subject
* - `greylist`: greylist message
* @param {rspamd_action or string} action a numeric or string action value
* @param {string} description optional descripton
@example
local function cb(task)
local gr = task:get_header('Greylist')
if gr and gr == 'greylist' then
task:set_pre_result(rspamd_actions['greylist'], 'Greylisting required')
end
end
*/
LUA_FUNCTION_DEF (task, set_pre_result);
/***
* @method task:get_urls()
* Get all URLs found in a message.
* @return {table rspamd_url} list of all urls found
@example
local function phishing_cb(task)
local urls = task:get_urls();
if urls then
for _,url in ipairs(urls) do
if url:is_phished() then
return true
end
end
end
return false
end
*/
LUA_FUNCTION_DEF (task, get_urls);
/***
* @method task:get_urls()
* Get all email addresses found in a message.
* @return {table rspamd_url} list of all email addresses found
*/
LUA_FUNCTION_DEF (task, get_emails);
/***
* @method task:get_text_parts()
* Get all text (and HTML) parts found in a message
* @return {table rspamd_text_part} list of text parts
*/
LUA_FUNCTION_DEF (task, get_text_parts);
/***
* @method task:get_parts()
* Get all mime parts found in a message
* @return {table rspamd_mime_part} list of mime parts
*/
LUA_FUNCTION_DEF (task, get_parts);
/***
* @method task:get_header(name[, case_sensitive])
* Get decoded value of a header specified with optional case_sensitive flag.
* By default headers are searched in caseless matter.
* @param {string} name name of header to get
* @param {boolean} case_sensitive case sensitiveness flag to search for a header
* @return {string} decoded value of a header
*/
LUA_FUNCTION_DEF (task, get_header);
/***
* @method task:get_header_raw(name[, case_sensitive])
* Get raw value of a header specified with optional case_sensitive flag.
* By default headers are searched in caseless matter.
* @param {string} name name of header to get
* @param {boolean} case_sensitive case sensitiveness flag to search for a header
* @return {string} raw value of a header
*/
LUA_FUNCTION_DEF (task, get_header_raw);
/***
* @method task:get_header_full(name[, case_sensitive])
* Get raw value of a header specified with optional case_sensitive flag.
* By default headers are searched in caseless matter. This method returns more
* information about the header as a list of tables with the following structure:
*
* - `name` - name of a header
* - `value` - raw value of a header
* - `decoded` - decoded value of a header
* - `tab_separated` - `true` if a header and a value are separated by `tab` character
* - `empty_separator` - `true` if there are no separator between a header and a value
* @param {string} name name of header to get
* @param {boolean} case_sensitive case sensitiveness flag to search for a header
* @return {list of tables} all values of a header as specified above
@example
function check_header_delimiter_tab(task, header_name)
for _,rh in ipairs(task:get_header_full(header_name)) do
if rh['tab_separated'] then return true end
end
return false
end
*/
LUA_FUNCTION_DEF (task, get_header_full);
/***
* @method task:get_received_headers()
* Returns a list of tables of parsed received headers. A tables returned have
* the following structure:
*
* - `from_hostname` - string that represents hostname provided by a peer
* - `from_ip` - string representation of IP address as provided by a peer
* - `real_hostname` - hostname as resolved by MTA
* - `real_ip` - string representation of IP as resolved by PTR request of MTA
* - `by_hostname` - MTA hostname
*
* Please note that in some situations rspamd cannot parse all the fields of received headers.
* In that case you should check all strings for validity.
* @return {table of tables} list of received headers described above
*/
LUA_FUNCTION_DEF (task, get_received_headers);
/***
* @method task:get_resolver()
* Returns ready to use rspamd_resolver object suitable for making asynchronous DNS requests.
* @return {rspamd_resolver} resolver object associated with the task's session
* @example
local logger = require "rspamd_logger"
local function task_cb(task)
local function dns_cb(resolver, to_resolve, results, err)
-- task object is available due to closure
task:inc_dns_req()
if results then
logger.info(string.format('<%s> [%s] resolved for symbol: %s',
task:get_message_id(), to_resolve, 'EXAMPLE_SYMBOL'))
task:insert_result('EXAMPLE_SYMBOL', 1)
end
end
local r = task:get_resolver()
r:resolve_a(task:get_session(), task:get_mempool(), 'example.com', dns_cb)
end
*/
LUA_FUNCTION_DEF (task, get_resolver);
/***
* @method task:inc_dns_req()
* Increment number of DNS requests for the task. Is used just for logging purposes.
*/
LUA_FUNCTION_DEF (task, inc_dns_req);
/***
* @method task:call_rspamd_function(function[, param, param...])
* Calls rspamd expression function `func` with the specified parameters.
* It returns the boolean result of function invocation.
* @param {string} function name of internal or registered lua function to call
* @param {list of strings} params parameters for a function
* @return {bool} true or false returned by expression function
*/
LUA_FUNCTION_DEF (task, call_rspamd_function);
/***
* @method task:get_recipients([type])
* Return SMTP or MIME recipients for a task. This function returns list of internet addresses each one is a table with the following structure:
*
* - `name` - name of internet address in UTF8, e.g. for `Vsevolod Stakhov <blah@foo.com>` it returns `Vsevolod Stakhov`
* - `addr` - address part of the address
* - `user` - user part (if present) of the address, e.g. `blah`
* - `domain` - domain part (if present), e.g. `foo.com`
* @param {integer} type if specified has the following meaning: `0` means try SMTP recipients and fallback to MIME if failed, `1` means checking merely SMTP recipients and `2` means MIME recipients only
* @return {list of addresses} list of recipients or `nil`
*/
LUA_FUNCTION_DEF (task, get_recipients);
/***
* @method task:get_from([type])
* Return SMTP or MIME sender for a task. This function returns list of internet addresses each one is a table with the following structure:
*
* - `name` - name of internet address in UTF8, e.g. for `Vsevolod Stakhov <blah@foo.com>` it returns `Vsevolod Stakhov`
* - `addr` - address part of the address
* - `user` - user part (if present) of the address, e.g. `blah`
* - `domain` - domain part (if present), e.g. `foo.com`
* @param {integer} type if specified has the following meaning: `0` means try SMTP sender and fallback to MIME if failed, `1` means checking merely SMTP sender and `2` means MIME `From:` only
* @return {list of addresses} list of recipients or `nil`
*/
LUA_FUNCTION_DEF (task, get_from);
/***
* @method task:get_user()
* Returns authenticated user name for this task if specified by an MTA.
* @return {string} username or nil
*/
LUA_FUNCTION_DEF (task, get_user);
LUA_FUNCTION_DEF (task, set_user);
/***
* @method task:get_from_ip()
* Returns [ip_addr](ip.md) object of a sender that is provided by MTA
* @return {rspamd_ip} ip address object
*/
LUA_FUNCTION_DEF (task, get_from_ip);
LUA_FUNCTION_DEF (task, set_from_ip);
LUA_FUNCTION_DEF (task, get_from_ip_num);
/***
* @method task:get_client_ip()
* Returns [ip_addr](ip.md) object of a client connected to rspamd (normally, it is an IP address of MTA)
* @return {rspamd_ip} ip address object
*/
LUA_FUNCTION_DEF (task, get_client_ip);
/***
* @method task:get_helo()
* Returns the value of SMTP helo provided by MTA.
* @return {string} HELO value
*/
LUA_FUNCTION_DEF (task, get_helo);
LUA_FUNCTION_DEF (task, set_helo);
/***
* @method task:get_hostname()
* Returns the value of sender's hostname provided by MTA
* @return {string} hostname value
*/
LUA_FUNCTION_DEF (task, get_hostname);
LUA_FUNCTION_DEF (task, set_hostname);
/***
* @method task:get_images()
* Returns list of all images found in a task as a table of `rspamd_image`.
* @return {list of rspamd_image} images found in a message
*/
LUA_FUNCTION_DEF (task, get_images);
/***
* @method task:get_symbol(name)
* Searches for a symbol `name` in all metrics results and returns a list of tables
* one per metric that describes the symbol inserted. Please note that this function
* is intended to return values for **inserted** symbols, so if this symbol was not
* inserted it won't be in the function's output. This method is useful for post-filters mainly.
* The symbols are returned as the list of the following tables:
*
* - `metric` - name of metric
* - `score` - score of a symbol in that metric
* - `options` - a table of strings representing options of a symbol
* @param {string} name symbol's name
* @return {list of tables} list of tables or nil if symbol was not found in any metric
*/
LUA_FUNCTION_DEF (task, get_symbol);
/***
* @method task:get_date(type[, gmt])
* Returns timestamp for a connection or for a MIME message. This function can be called with a
* single table arguments with the following fields:
*
* * `format` - a format of date returned:
* - `message` - returns a mime date as integer (unix timestamp)
* - `message_str` - returns a mime date as string (UTC format)
* - `connect` - returns a unix timestamp of a connection to rspamd
* - `connect_str` - returns connection time in UTC format
* * `gmt` - returns date in `GMT` timezone (normal for unix timestamps)
*
* By default this function returns connection time in numeric format.
* @param {string} type date format as described above
* @param {boolean} gmt gmt flag as described above
* @return {string/number} date representation according to format
* @example
rspamd_config.DATE_IN_PAST = function(task)
local dm = task:get_date{format = 'message', gmt = true}
local dt = task:get_date{format = 'connect', gmt = true}
-- A day
if dt - dm > 86400 then
return true
end
return false
end
*/
LUA_FUNCTION_DEF (task, get_date);
/***
* @method task:get_message_id()
* Returns message id of the specified task
* @return {string} if of a message
*/
LUA_FUNCTION_DEF (task, get_message_id);
LUA_FUNCTION_DEF (task, get_timeval);
/***
* @method task:get_metric_score(name)
* Get the current score of metric `name`. Should be used in post-filters only.
* @param {string} name name of a metric
* @return {number} the current score of the metric
*/
LUA_FUNCTION_DEF (task, get_metric_score);
/***
* @method task:get_metric_action(name)
* Get the current action of metric `name`. Should be used in post-filters only.
* @param {string} name name of a metric
* @return {string} the current action of the metric as a string
*/
LUA_FUNCTION_DEF (task, get_metric_action);
/***
* @method task:learn(is_spam[, classifier)
* Learn classifier `classifier` with the task. If `is_spam` is true then message
* is learnt as spam. Otherwise HAM is learnt. By default, this function learns
* `bayes` classifier.
* @param {boolean} is_spam learn spam or ham
* @param {string} classifier classifier's name
* @return {boolean} `true` if classifier has been learnt successfully
*/
LUA_FUNCTION_DEF (task, learn);
/***
* @method task:set_settings(obj)
* Set users settings object for a task. The format of this object is described
* [here](https://rspamd.com/doc/configuration/settings.html).
* @param {any} obj any lua object that corresponds to the settings format
*/
LUA_FUNCTION_DEF (task, set_settings);
static const struct luaL_reg tasklib_f[] = {
LUA_INTERFACE_DEF (task, create_empty),
LUA_INTERFACE_DEF (task, create_from_buffer),
{NULL, NULL}
};
static const struct luaL_reg tasklib_m[] = {
LUA_INTERFACE_DEF (task, get_message),
LUA_INTERFACE_DEF (task, destroy),
LUA_INTERFACE_DEF (task, process_message),
LUA_INTERFACE_DEF (task, set_cfg),
LUA_INTERFACE_DEF (task, get_cfg),
LUA_INTERFACE_DEF (task, get_mempool),
LUA_INTERFACE_DEF (task, get_session),
LUA_INTERFACE_DEF (task, get_ev_base),
LUA_INTERFACE_DEF (task, insert_result),
LUA_INTERFACE_DEF (task, set_pre_result),
LUA_INTERFACE_DEF (task, get_urls),
LUA_INTERFACE_DEF (task, get_emails),
LUA_INTERFACE_DEF (task, get_text_parts),
LUA_INTERFACE_DEF (task, get_parts),
LUA_INTERFACE_DEF (task, get_header),
LUA_INTERFACE_DEF (task, get_header_raw),
LUA_INTERFACE_DEF (task, get_header_full),
LUA_INTERFACE_DEF (task, get_received_headers),
LUA_INTERFACE_DEF (task, get_resolver),
LUA_INTERFACE_DEF (task, inc_dns_req),
LUA_INTERFACE_DEF (task, call_rspamd_function),
LUA_INTERFACE_DEF (task, get_recipients),
LUA_INTERFACE_DEF (task, get_from),
LUA_INTERFACE_DEF (task, get_user),
LUA_INTERFACE_DEF (task, set_user),
LUA_INTERFACE_DEF (task, get_from_ip),
LUA_INTERFACE_DEF (task, set_from_ip),
LUA_INTERFACE_DEF (task, get_from_ip_num),
LUA_INTERFACE_DEF (task, get_client_ip),
LUA_INTERFACE_DEF (task, get_helo),
LUA_INTERFACE_DEF (task, set_helo),
LUA_INTERFACE_DEF (task, get_hostname),
LUA_INTERFACE_DEF (task, set_hostname),
LUA_INTERFACE_DEF (task, get_images),
LUA_INTERFACE_DEF (task, get_symbol),
LUA_INTERFACE_DEF (task, get_date),
LUA_INTERFACE_DEF (task, get_message_id),
LUA_INTERFACE_DEF (task, get_timeval),
LUA_INTERFACE_DEF (task, get_metric_score),
LUA_INTERFACE_DEF (task, get_metric_action),
LUA_INTERFACE_DEF (task, learn),
LUA_INTERFACE_DEF (task, set_settings),
{"__tostring", rspamd_lua_class_tostring},
{NULL, NULL}
};
/* Textpart methods */
LUA_FUNCTION_DEF (textpart, get_content);
LUA_FUNCTION_DEF (textpart, get_length);
LUA_FUNCTION_DEF (textpart, is_empty);
LUA_FUNCTION_DEF (textpart, is_html);
LUA_FUNCTION_DEF (textpart, get_fuzzy);
LUA_FUNCTION_DEF (textpart, get_language);
LUA_FUNCTION_DEF (textpart, compare_distance);
static const struct luaL_reg textpartlib_m[] = {
LUA_INTERFACE_DEF (textpart, get_content),
LUA_INTERFACE_DEF (textpart, get_length),
LUA_INTERFACE_DEF (textpart, is_empty),
LUA_INTERFACE_DEF (textpart, is_html),
LUA_INTERFACE_DEF (textpart, get_fuzzy),
LUA_INTERFACE_DEF (textpart, get_language),
LUA_INTERFACE_DEF (textpart, compare_distance),
{"__tostring", rspamd_lua_class_tostring},
{NULL, NULL}
};
/* Mimepart methods */
LUA_FUNCTION_DEF (mimepart, get_content);
LUA_FUNCTION_DEF (mimepart, get_length);
LUA_FUNCTION_DEF (mimepart, get_type);
LUA_FUNCTION_DEF (mimepart, get_filename);
static const struct luaL_reg mimepartlib_m[] = {
LUA_INTERFACE_DEF (mimepart, get_content),
LUA_INTERFACE_DEF (mimepart, get_length),
LUA_INTERFACE_DEF (mimepart, get_type),
LUA_INTERFACE_DEF (mimepart, get_filename),
{"__tostring", rspamd_lua_class_tostring},
{NULL, NULL}
};
/* Image methods */
LUA_FUNCTION_DEF (image, get_width);
LUA_FUNCTION_DEF (image, get_height);
LUA_FUNCTION_DEF (image, get_type);
LUA_FUNCTION_DEF (image, get_filename);
LUA_FUNCTION_DEF (image, get_size);
static const struct luaL_reg imagelib_m[] = {
LUA_INTERFACE_DEF (image, get_width),
LUA_INTERFACE_DEF (image, get_height),
LUA_INTERFACE_DEF (image, get_type),
LUA_INTERFACE_DEF (image, get_filename),
LUA_INTERFACE_DEF (image, get_size),
{"__tostring", rspamd_lua_class_tostring},
{NULL, NULL}
};
/* URL methods */
LUA_FUNCTION_DEF (url, get_length);
LUA_FUNCTION_DEF (url, get_host);
LUA_FUNCTION_DEF (url, get_user);
LUA_FUNCTION_DEF (url, get_path);
LUA_FUNCTION_DEF (url, get_text);
LUA_FUNCTION_DEF (url, is_phished);
LUA_FUNCTION_DEF (url, get_phished);
static const struct luaL_reg urllib_m[] = {
LUA_INTERFACE_DEF (url, get_length),
LUA_INTERFACE_DEF (url, get_host),
LUA_INTERFACE_DEF (url, get_user),
LUA_INTERFACE_DEF (url, get_path),
LUA_INTERFACE_DEF (url, get_text),
LUA_INTERFACE_DEF (url, is_phished),
LUA_INTERFACE_DEF (url, get_phished),
{"__tostring", rspamd_lua_class_tostring},
{NULL, NULL}
};
/* Utility functions */
static struct rspamd_task *
lua_check_task (lua_State * L)
{
void *ud = luaL_checkudata (L, 1, "rspamd{task}");
luaL_argcheck (L, ud != NULL, 1, "'task' expected");
return ud ? *((struct rspamd_task **)ud) : NULL;
}
static struct mime_text_part *
lua_check_textpart (lua_State * L)
{
void *ud = luaL_checkudata (L, 1, "rspamd{textpart}");
luaL_argcheck (L, ud != NULL, 1, "'textpart' expected");
return ud ? *((struct mime_text_part **)ud) : NULL;
}
static struct mime_part *
lua_check_mimepart (lua_State * L)
{
void *ud = luaL_checkudata (L, 1, "rspamd{mimepart}");
luaL_argcheck (L, ud != NULL, 1, "'mimepart' expected");
return ud ? *((struct mime_part **)ud) : NULL;
}
static struct rspamd_image *
lua_check_image (lua_State * L)
{
void *ud = luaL_checkudata (L, 1, "rspamd{image}");
luaL_argcheck (L, ud != NULL, 1, "'image' expected");
return ud ? *((struct rspamd_image **)ud) : NULL;
}
static struct uri *
lua_check_url (lua_State * L)
{
void *ud = luaL_checkudata (L, 1, "rspamd{url}");
luaL_argcheck (L, ud != NULL, 1, "'url' expected");
return ud ? *((struct uri **)ud) : NULL;
}
static int
lua_task_create_empty (lua_State *L)
{
struct rspamd_task **ptask, *task;
task = rspamd_task_new (NULL);
ptask = lua_newuserdata (L, sizeof (gpointer));
rspamd_lua_setclass (L, "rspamd{task}", -1);
*ptask = task;
return 1;
}
static int
lua_task_create_from_buffer (lua_State *L)
{
struct rspamd_task **ptask, *task;
const gchar *data;
size_t len;
data = luaL_checklstring (L, 1, &len);
if (data) {
task = rspamd_task_new (NULL);
ptask = lua_newuserdata (L, sizeof (gpointer));
rspamd_lua_setclass (L, "rspamd{task}", -1);
*ptask = task;
task->msg = g_string_new_len (data, len);
}
return 1;
}
static int
lua_task_process_message (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task != NULL && task->msg != NULL && task->msg->len > 0) {
if (process_message (task) == 0) {
lua_pushboolean (L, TRUE);
}
else {
lua_pushboolean (L, FALSE);
}
}
else {
lua_pushboolean (L, FALSE);
}
return 1;
}
static int
lua_task_get_cfg (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
struct rspamd_config **pcfg;
pcfg = lua_newuserdata (L, sizeof (gpointer));
rspamd_lua_setclass (L, "rspamd{config}", -1);
*pcfg = task->cfg;
return 1;
}
static int
lua_task_set_cfg (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
void *ud = luaL_checkudata (L, 2, "rspamd{config}");
luaL_argcheck (L, ud != NULL, 1, "'config' expected");
task->cfg = ud ? *((struct rspamd_config **)ud) : NULL;
return 0;
}
static int
lua_task_destroy (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task != NULL) {
rspamd_task_free (task, FALSE);
}
return 0;
}
static int
lua_task_get_message (lua_State * L)
{
GMimeMessage **pmsg;
struct rspamd_task *task = lua_check_task (L);
if (task != NULL && task->message != NULL) {
pmsg = lua_newuserdata (L, sizeof (GMimeMessage *));
rspamd_lua_setclass (L, "rspamd{message}", -1);
*pmsg = task->message;
}
else {
lua_pushnil (L);
}
return 1;
}
static int
lua_task_get_mempool (lua_State * L)
{
rspamd_mempool_t **ppool;
struct rspamd_task *task = lua_check_task (L);
if (task != NULL) {
ppool = lua_newuserdata (L, sizeof (rspamd_mempool_t *));
rspamd_lua_setclass (L, "rspamd{mempool}", -1);
*ppool = task->task_pool;
}
else {
lua_pushnil (L);
}
return 1;
}
static int
lua_task_get_session (lua_State * L)
{
struct rspamd_async_session **psession;
struct rspamd_task *task = lua_check_task (L);
if (task != NULL) {
psession = lua_newuserdata (L, sizeof (void *));
rspamd_lua_setclass (L, "rspamd{session}", -1);
*psession = task->s;
}
else {
lua_pushnil (L);
}
return 1;
}
static int
lua_task_get_ev_base (lua_State * L)
{
struct event_base **pbase;
struct rspamd_task *task = lua_check_task (L);
if (task != NULL) {
pbase = lua_newuserdata (L, sizeof (struct event_base *));
rspamd_lua_setclass (L, "rspamd{ev_base}", -1);
*pbase = task->ev_base;
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_insert_result (lua_State * L)
{
struct rspamd_task *task = lua_check_task (L);
const gchar *symbol_name, *param;
double flag;
GList *params = NULL;
gint i, top;
if (task != NULL) {
symbol_name =
rspamd_mempool_strdup (task->task_pool, luaL_checkstring (L, 2));
flag = luaL_checknumber (L, 3);
top = lua_gettop (L);
/* Get additional options */
for (i = 4; i <= top; i++) {
param = luaL_checkstring (L, i);
params =
g_list_prepend (params,
rspamd_mempool_strdup (task->task_pool, param));
}
rspamd_task_insert_result (task, symbol_name, flag, params);
}
return 0;
}
static gint
lua_task_set_pre_result (lua_State * L)
{
struct rspamd_task *task = lua_check_task (L);
struct metric_result *mres;
gchar *action_str;
gint action = METRIC_ACTION_MAX;
if (task != NULL) {
if (lua_type (L, 2) == LUA_TNUMBER) {
action = lua_tointeger (L, 2);
}
else if (lua_type (L, 2) == LUA_TSTRING) {
rspamd_action_from_str (lua_tostring (L, 2), &action);
}
if (action < (gint)task->pre_result.action &&
action < METRIC_ACTION_MAX &&
action >= METRIC_ACTION_REJECT) {
/* We also need to set the default metric to that result */
mres = rspamd_create_metric_result (task, DEFAULT_METRIC);
if (mres != NULL) {
mres->score = mres->metric->actions[action].score;
mres->action = action;
}
task->pre_result.action = action;
if (lua_gettop (L) >= 3) {
action_str = rspamd_mempool_strdup (task->task_pool,
luaL_checkstring (L, 3));
task->pre_result.str = action_str;
task->messages = g_list_prepend (task->messages, action_str);
}
else {
task->pre_result.str = "unknown";
}
msg_info ("<%s>: set pre-result to %s: '%s'",
task->message_id, rspamd_action_to_str (action),
task->pre_result.str);
}
}
return 0;
}
struct lua_tree_cb_data {
lua_State *L;
int i;
};
static gboolean
lua_tree_url_callback (gpointer key, gpointer value, gpointer ud)
{
struct uri **purl;
struct lua_tree_cb_data *cb = ud;
purl = lua_newuserdata (cb->L, sizeof (struct uri *));
rspamd_lua_setclass (cb->L, "rspamd{url}", -1);
*purl = value;
lua_rawseti (cb->L, -2, cb->i++);
return FALSE;
}
static gint
lua_task_get_urls (lua_State * L)
{
struct rspamd_task *task = lua_check_task (L);
struct lua_tree_cb_data cb;
if (task) {
lua_newtable (L);
cb.i = 1;
cb.L = L;
g_tree_foreach (task->urls, lua_tree_url_callback, &cb);
return 1;
}
lua_pushnil (L);
return 1;
}
static gint
lua_task_get_emails (lua_State * L)
{
struct rspamd_task *task = lua_check_task (L);
struct lua_tree_cb_data cb;
if (task) {
lua_newtable (L);
cb.i = 1;
cb.L = L;
g_tree_foreach (task->emails, lua_tree_url_callback, &cb);
return 1;
}
lua_pushnil (L);
return 1;
}
static gint
lua_task_get_text_parts (lua_State * L)
{
gint i = 1;
struct rspamd_task *task = lua_check_task (L);
GList *cur;
struct mime_text_part *part, **ppart;
if (task != NULL) {
lua_newtable (L);
cur = task->text_parts;
while (cur) {
part = cur->data;
ppart = lua_newuserdata (L, sizeof (struct mime_text_part *));
*ppart = part;
rspamd_lua_setclass (L, "rspamd{textpart}", -1);
/* Make it array */
lua_rawseti (L, -2, i++);
cur = g_list_next (cur);
}
return 1;
}
lua_pushnil (L);
return 1;
}
static gint
lua_task_get_parts (lua_State * L)
{
gint i = 1;
struct rspamd_task *task = lua_check_task (L);
GList *cur;
struct mime_part *part, **ppart;
if (task != NULL) {
lua_newtable (L);
cur = task->parts;
while (cur) {
part = cur->data;
ppart = lua_newuserdata (L, sizeof (struct mime_part *));
*ppart = part;
rspamd_lua_setclass (L, "rspamd{mimepart}", -1);
/* Make it array */
lua_rawseti (L, -2, i++);
cur = g_list_next (cur);
}
return 1;
}
lua_pushnil (L);
return 1;
}
static gint
lua_task_push_header (lua_State * L,
struct rspamd_task *task,
const gchar *name,
gboolean strong,
gboolean full,
gboolean raw)
{
struct raw_header *rh;
gint i = 1;
const gchar *val;
rh = g_hash_table_lookup (task->raw_headers, name);
if (rh == NULL) {
lua_pushnil (L);
return 1;
}
if (full) {
lua_newtable (L);
}
while (rh) {
if (rh->name == NULL) {
rh = rh->next;
continue;
}
/* Check case sensivity */
if (strong) {
if (strcmp (rh->name, name) != 0) {
rh = rh->next;
continue;
}
}
if (full) {
/* Create new associated table for a header */
lua_newtable (L);
rspamd_lua_table_set (L, "name", rh->name);
if (rh->value) {
rspamd_lua_table_set (L, "value", rh->value);
}
if (rh->decoded) {
rspamd_lua_table_set (L, "decoded", rh->value);
}
lua_pushstring (L, "tab_separated");
lua_pushboolean (L, rh->tab_separated);
lua_settable (L, -3);
lua_pushstring (L, "empty_separator");
lua_pushboolean (L, rh->empty_separator);
lua_settable (L, -3);
rspamd_lua_table_set (L, "separator", rh->separator);
lua_rawseti (L, -2, i++);
/* Process next element */
rh = rh->next;
}
else {
if (raw) {
val = rh->decoded;
}
else {
val = rh->value;
}
if (val) {
lua_pushstring (L, val);
}
else {
lua_pushnil (L);
}
return 1;
}
}
return 1;
}
static gint
lua_task_get_header_common (lua_State *L, gboolean full, gboolean raw)
{
gboolean strong = FALSE;
struct rspamd_task *task = lua_check_task (L);
const gchar *name;
name = luaL_checkstring (L, 2);
if (name && task) {
if (lua_gettop (L) == 3) {
strong = lua_toboolean (L, 3);
}
return lua_task_push_header (L, task, name, strong, full, raw);
}
lua_pushnil (L);
return 1;
}
static gint
lua_task_get_header_full (lua_State * L)
{
return lua_task_get_header_common (L, TRUE, TRUE);
}
static gint
lua_task_get_header (lua_State * L)
{
return lua_task_get_header_common (L, FALSE, FALSE);
}
static gint
lua_task_get_header_raw (lua_State * L)
{
return lua_task_get_header_common (L, FALSE, TRUE);
}
static gint
lua_task_get_received_headers (lua_State * L)
{
struct rspamd_task *task = lua_check_task (L);
GList *cur;
struct received_header *rh;
gint i = 1;
if (task) {
lua_newtable (L);
cur = g_list_first (task->received);
while (cur) {
rh = cur->data;
if (rh->is_error || G_UNLIKELY (
rh->from_ip == NULL &&
rh->real_ip == NULL &&
rh->real_hostname == NULL &&
rh->by_hostname == NULL)) {
cur = g_list_next (cur);
continue;
}
lua_newtable (L);
rspamd_lua_table_set (L, "from_hostname", rh->from_hostname);
lua_pushstring (L, "from_ip");
rspamd_lua_ip_push_fromstring (L, rh->from_ip);
lua_settable (L, -3);
rspamd_lua_table_set (L, "real_hostname", rh->real_hostname);
lua_pushstring (L, "real_ip");
rspamd_lua_ip_push_fromstring (L, rh->real_ip);
lua_settable (L, -3);
rspamd_lua_table_set (L, "by_hostname", rh->by_hostname);
lua_rawseti (L, -2, i++);
cur = g_list_next (cur);
}
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_get_resolver (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
struct rspamd_dns_resolver **presolver;
if (task != NULL && task->resolver != NULL) {
presolver = lua_newuserdata (L, sizeof (void *));
rspamd_lua_setclass (L, "rspamd{resolver}", -1);
*presolver = task->resolver;
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_inc_dns_req (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task != NULL) {
task->dns_requests++;
}
return 0;
}
static gint
lua_task_call_rspamd_function (lua_State * L)
{
struct rspamd_task *task = lua_check_task (L);
struct expression_function f;
gint i, top;
gboolean res;
gchar *arg;
if (task) {
f.name = (gchar *)luaL_checkstring (L, 2);
if (f.name) {
f.args = NULL;
top = lua_gettop (L);
/* Get arguments after function name */
for (i = 3; i <= top; i++) {
arg = (gchar *)luaL_checkstring (L, i);
if (arg != NULL) {
f.args = g_list_prepend (f.args, arg);
}
}
res = call_expression_function (&f, task, L);
lua_pushboolean (L, res);
if (f.args) {
g_list_free (f.args);
}
return 1;
}
}
lua_pushnil (L);
return 1;
}
static gboolean
lua_push_internet_address (lua_State *L, InternetAddress *ia)
{
#ifndef GMIME24
if (internet_address_get_type (ia) == INTERNET_ADDRESS_NAME) {
lua_newtable (L);
rspamd_lua_table_set (L, "name", internet_address_get_name (ia));
rspamd_lua_table_set (L, "addr", internet_address_get_addr (ia));
return TRUE;
}
return FALSE;
#else
InternetAddressMailbox *iamb;
const char *addr, *at;
if (ia && INTERNET_ADDRESS_IS_MAILBOX (ia)) {
lua_newtable (L);
iamb = INTERNET_ADDRESS_MAILBOX (ia);
addr = internet_address_mailbox_get_addr (iamb);
if (addr) {
rspamd_lua_table_set (L, "name", internet_address_get_name (ia));
rspamd_lua_table_set (L, "addr", addr);
/* Set optional fields */
at = strchr (addr, '@');
if (at != NULL) {
lua_pushstring(L, "user");
lua_pushlstring(L, addr, at - addr);
lua_settable (L, -3);
lua_pushstring(L, "domain");
lua_pushstring(L, at + 1);
lua_settable (L, -3);
}
return TRUE;
}
}
return FALSE;
#endif
}
/*
* Push internet addresses to lua as a table
*/
static void
lua_push_internet_address_list (lua_State *L, InternetAddressList *addrs)
{
InternetAddress *ia;
gint idx = 1;
#ifndef GMIME24
/* Gmime 2.2 version */
InternetAddressList *cur;
lua_newtable (L);
cur = addrs;
while (cur) {
ia = internet_address_list_get_address (cur);
if (lua_push_internet_address (L, ia)) {
lua_rawseti (L, -2, idx++);
}
cur = internet_address_list_next (cur);
}
#else
/* Gmime 2.4 version */
gsize len, i;
lua_newtable (L);
if (addrs != NULL) {
len = internet_address_list_length (addrs);
for (i = 0; i < len; i++) {
ia = internet_address_list_get_address (addrs, i);
if (lua_push_internet_address (L, ia)) {
lua_rawseti (L, -2, idx++);
}
}
}
#endif
}
static gint
lua_task_get_recipients (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
InternetAddressList *addrs;
gint what = 0;
if (task) {
if (lua_gettop (L) == 2) {
/* Get what value */
what = lua_tonumber (L, 2);
}
switch (what) {
case 1:
/* Here we check merely envelope rcpt */
addrs = task->rcpt_envelope;
break;
case 2:
/* Here we check merely mime rcpt */
addrs = task->rcpt_mime;
break;
case 0:
default:
if (task->rcpt_envelope) {
addrs = task->rcpt_envelope;
}
else {
addrs = task->rcpt_mime;
}
break;
}
if (addrs) {
lua_push_internet_address_list (L, addrs);
}
else {
lua_pushnil (L);
}
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_get_from (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
InternetAddressList *addrs;
gint what = 0;
if (task) {
if (lua_gettop (L) == 2) {
/* Get what value */
what = lua_tonumber (L, 2);
}
switch (what) {
case 1:
/* Here we check merely envelope rcpt */
addrs = task->from_envelope;
break;
case 2:
/* Here we check merely mime rcpt */
addrs = task->from_mime;
break;
case 0:
default:
if (task->from_envelope) {
addrs = task->from_envelope;
}
else {
addrs = task->from_mime;
}
break;
}
if (addrs) {
lua_push_internet_address_list (L, addrs);
}
else {
lua_pushnil (L);
}
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_get_user (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task && task->user != NULL) {
lua_pushstring (L, task->user);
return 1;
}
lua_pushnil (L);
return 1;
}
static gint
lua_task_set_user (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
const gchar *new_user;
if (task) {
new_user = luaL_checkstring (L, 2);
if (new_user) {
task->user = rspamd_mempool_strdup (task->task_pool, new_user);
}
}
return 0;
}
static gint
lua_task_get_from_ip (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task) {
rspamd_lua_ip_push (L, &task->from_addr);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_set_from_ip (lua_State *L)
{
msg_err ("this function is deprecated and should no longer be used");
return 0;
}
static gint
lua_task_get_from_ip_num (lua_State *L)
{
msg_err ("this function is deprecated and should no longer be used");
lua_pushnil (L);
return 1;
}
static gint
lua_task_get_client_ip (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task) {
rspamd_lua_ip_push (L, &task->client_addr);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_get_helo (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task) {
if (task->helo != NULL) {
lua_pushstring (L, (gchar *)task->helo);
return 1;
}
}
lua_pushnil (L);
return 1;
}
static gint
lua_task_set_helo (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
const gchar *new_helo;
if (task) {
new_helo = luaL_checkstring (L, 2);
if (new_helo) {
task->helo = rspamd_mempool_strdup (task->task_pool, new_helo);
}
}
return 0;
}
static gint
lua_task_get_hostname (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task) {
if (task->hostname != NULL) {
/* Check whether it looks like an IP address */
if (*task->hostname == '[') {
/*
* From the milter documentation:
* If the reverse lookup fails or if none of the IP
* addresses of the resolved host name matches the
* original IP address, hostname will contain the
* message sender's IP address enclosed in square
* brackets (e.g. `[a.b.c.d]')
*/
lua_pushstring (L, "unknown");
}
else {
lua_pushstring (L, task->hostname);
}
return 1;
}
}
lua_pushnil (L);
return 1;
}
static gint
lua_task_set_hostname (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
const gchar *new_hostname;
if (task) {
new_hostname = luaL_checkstring (L, 2);
if (new_hostname) {
task->hostname = rspamd_mempool_strdup (task->task_pool,
new_hostname);
}
}
return 0;
}
static gint
lua_task_get_images (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
gint i = 1;
GList *cur;
struct rspamd_image **pimg;
if (task) {
cur = task->images;
if (cur != NULL) {
lua_newtable (L);
while (cur) {
pimg = lua_newuserdata (L, sizeof (struct rspamd_image *));
rspamd_lua_setclass (L, "rspamd{image}", -1);
*pimg = cur->data;
lua_rawseti (L, -2, i++);
cur = g_list_next (cur);
}
return 1;
}
}
lua_pushnil (L);
return 1;
}
static inline gboolean
lua_push_symbol_result (lua_State *L,
struct rspamd_task *task,
struct metric *metric,
const gchar *symbol)
{
struct metric_result *metric_res;
struct symbol *s;
gint j;
GList *opt;
metric_res = g_hash_table_lookup (task->results, metric->name);
if (metric_res) {
if ((s = g_hash_table_lookup (metric_res->symbols, symbol)) != NULL) {
j = 0;
lua_newtable (L);
lua_pushstring (L, "metric");
lua_pushstring (L, metric->name);
lua_settable (L, -3);
lua_pushstring (L, "score");
lua_pushnumber (L, s->score);
lua_settable (L, -3);
if (s->options) {
opt = s->options;
lua_pushstring (L, "options");
lua_newtable (L);
while (opt) {
lua_pushstring (L, opt->data);
lua_rawseti (L, -2, j++);
opt = g_list_next (opt);
}
lua_settable (L, -3);
}
return TRUE;
}
}
return FALSE;
}
static gint
lua_task_get_symbol (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
const gchar *symbol;
struct metric *metric;
GList *cur = NULL, *metric_list;
gboolean found = FALSE;
gint i = 1;
symbol = luaL_checkstring (L, 2);
if (task && symbol) {
metric_list = g_hash_table_lookup (task->cfg->metrics_symbols, symbol);
if (metric_list) {
lua_newtable (L);
cur = metric_list;
}
else {
metric = task->cfg->default_metric;
}
if (!cur && metric) {
if ((found = lua_push_symbol_result (L, task, metric, symbol))) {
lua_newtable (L);
lua_rawseti (L, -2, i++);
}
}
else {
while (cur) {
metric = cur->data;
if (lua_push_symbol_result (L, task, metric, symbol)) {
lua_rawseti (L, -2, i++);
found = TRUE;
}
cur = g_list_next (cur);
}
}
}
if (!found) {
lua_pushnil (L);
}
return 1;
}
enum lua_date_type {
DATE_CONNECT = 0,
DATE_MESSAGE,
DATE_CONNECT_STRING,
DATE_MESSAGE_STRING
};
static enum lua_date_type
lua_task_detect_date_type (lua_State *L, gint idx, gboolean *gmt)
{
enum lua_date_type type = DATE_CONNECT;
if (lua_type (L, idx) == LUA_TNUMBER) {
gint num = lua_tonumber (L, idx);
if (num >= DATE_CONNECT && num <= DATE_MESSAGE_STRING) {
return num;
}
}
else if (lua_type (L, idx) == LUA_TTABLE) {
const gchar *str;
lua_pushvalue (L, idx);
lua_pushstring (L, "format");
lua_gettable (L, -2);
str = lua_tostring (L, -1);
if (g_ascii_strcasecmp (str, "message") == 0) {
type = DATE_MESSAGE;
}
else if (g_ascii_strcasecmp (str, "connect_str") == 0) {
type = DATE_CONNECT_STRING;
}
else if (g_ascii_strcasecmp (str, "message_str") == 0) {
type = DATE_MESSAGE_STRING;
}
lua_pop (L, 1);
lua_pushstring (L, "gmt");
lua_gettable (L, -2);
if (lua_type (L, -1) == LUA_TBOOLEAN) {
*gmt = lua_toboolean (L, -1);
}
/* Value and table */
lua_pop (L, 2);
}
return type;
}
static gint
lua_task_get_date (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
gdouble tim;
enum lua_date_type type = DATE_CONNECT;
gboolean gmt = TRUE;
if (task != NULL) {
if (lua_gettop (L) > 1) {
type = lua_task_detect_date_type (L, 2, &gmt);
}
/* Get GMT date and store it to time_t */
if (type == DATE_CONNECT || type == DATE_CONNECT_STRING) {
tim = (tv_to_msec (&task->tv)) / 1000.;
if (!gmt) {
struct tm t;
time_t tt;
tt = tim;
localtime_r (&tt, &t);
t.tm_gmtoff = 0;
t.tm_isdst = 0;
tim = mktime (&t);
}
}
else {
if (task->message) {
time_t tt;
gint offset;
g_mime_message_get_date (task->message, &tt, &offset);
if (!gmt) {
tt += (offset * 60 * 60) / 100 + (offset * 60 * 60) % 100;
}
tim = tt;
}
else {
tim = 0.0;
}
}
if (type == DATE_CONNECT || type == DATE_MESSAGE) {
lua_pushnumber (L, tim);
}
else {
GTimeVal tv;
gchar *out;
double_to_tv (tim, &tv);
out = g_time_val_to_iso8601 (&tv);
lua_pushstring (L, out);
g_free (out);
}
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_get_message_id (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task != NULL && task->message_id != NULL) {
lua_pushstring (L, task->message_id);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_get_timeval (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
if (task != NULL) {
lua_newtable (L);
lua_pushstring (L, "tv_sec");
lua_pushnumber (L, (lua_Number)task->tv.tv_sec);
lua_settable (L, -3);
lua_pushstring (L, "tv_usec");
lua_pushnumber (L, (lua_Number)task->tv.tv_usec);
lua_settable (L, -3);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_task_learn (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
gboolean is_spam = FALSE;
const gchar *clname;
struct rspamd_classifier_config *cl;
GError *err = NULL;
int ret = 1;
is_spam = lua_toboolean(L, 2);
if (lua_gettop (L) > 2) {
clname = luaL_checkstring (L, 3);
}
else {
clname = "bayes";
}
cl = rspamd_config_find_classifier (task->cfg, clname);
if (cl == NULL) {
msg_warn ("classifier %s is not found", clname);
lua_pushboolean (L, FALSE);
lua_pushstring (L, "classifier not found");
ret = 2;
}
else {
if (!rspamd_learn_task_spam (cl, task, is_spam, &err)) {
lua_pushboolean (L, FALSE);
if (err != NULL) {
lua_pushstring (L, err->message);
ret = 2;
}
}
else {
lua_pushboolean (L, TRUE);
}
}
return ret;
}
static gint
lua_task_set_settings (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
ucl_object_t *settings;
settings = ucl_object_lua_import (L, 2);
if (settings != NULL) {
task->settings = settings;
}
return 0;
}
static gint
lua_task_get_metric_score (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
const gchar *metric_name;
struct metric_result *metric_res;
metric_name = luaL_checkstring (L, 2);
if (task && metric_name) {
if ((metric_res =
g_hash_table_lookup (task->results, metric_name)) != NULL) {
lua_newtable (L);
lua_pushnumber (L, metric_res->score);
lua_rawseti (L, -2, 1);
lua_pushnumber (L,
metric_res->metric->actions[METRIC_ACTION_REJECT].score);
lua_rawseti (L, -2, 2);
lua_pushnumber (L,
metric_res->metric->actions[METRIC_ACTION_REJECT].score);
lua_rawseti (L, -2, 3);
}
else {
lua_pushnil (L);
}
return 1;
}
return 0;
}
static gint
lua_task_get_metric_action (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L);
const gchar *metric_name;
struct metric_result *metric_res;
enum rspamd_metric_action action;
metric_name = luaL_checkstring (L, 2);
if (task && metric_name) {
if ((metric_res =
g_hash_table_lookup (task->results, metric_name)) != NULL) {
action = rspamd_check_action_metric (task, metric_res->score,
NULL,
metric_res->metric);
lua_pushstring (L, rspamd_action_to_str (action));
}
else {
lua_pushnil (L);
}
return 1;
}
return 0;
}
/***
* @module mime_textpart
* This module provides different methods to manipulate text parts data. Text parts
* could be obtained from the `rspamd_task` by using of method `task:get_text_parts()`
@example
rspamd_config.R_EMPTY_IMAGE = function (task)
parts = task:get_text_parts()
if parts then
for _,part in ipairs(parts) do
if part:is_empty() then
images = task:get_images()
if images then
return true
end
return false
end
end
end
return false
end
*/
/***
* @method text_part:get_content()
* Get the text of the part
* @return {string} `UTF8` encoded content of the part
*/
static gint
lua_textpart_get_content (lua_State * L)
{
struct mime_text_part *part = lua_check_textpart (L);
if (part == NULL || part->is_empty) {
lua_pushnil (L);
return 1;
}
lua_pushlstring (L, (const gchar *)part->content->data, part->content->len);
return 1;
}
/***
* @method text_part:get_length()
* Get length of the text of the part
* @return {integer} length of part in **bytes**
*/
static gint
lua_textpart_get_length (lua_State * L)
{
struct mime_text_part *part = lua_check_textpart (L);
if (part == NULL) {
lua_pushnil (L);
return 1;
}
if (part->is_empty) {
lua_pushnumber (L, 0);
}
else {
lua_pushnumber (L, part->content->len);
}
return 1;
}
/***
* @method text_part:is_empty()
* Returns `true` if the specified part is empty
* @return {bool} whether a part is empty
*/
static gint
lua_textpart_is_empty (lua_State * L)
{
struct mime_text_part *part = lua_check_textpart (L);
if (part == NULL) {
lua_pushnil (L);
return 1;
}
lua_pushboolean (L, part->is_empty);
return 1;
}
/***
* @method text_part:is_html()
* Returns `true` if the specified part has HTML content
* @return {bool} whether a part is HTML part
*/
static gint
lua_textpart_is_html (lua_State * L)
{
struct mime_text_part *part = lua_check_textpart (L);
if (part == NULL) {
lua_pushnil (L);
return 1;
}
lua_pushboolean (L, part->is_html);
return 1;
}
/***
* @method text_part:get_fuzzy()
* Returns base32 encoded value of fuzzy hash of the specified part
* @return {string} fuzzy hash value
*/
static gint
lua_textpart_get_fuzzy (lua_State * L)
{
struct mime_text_part *part = lua_check_textpart (L);
gchar *out;
if (part == NULL || part->is_empty) {
lua_pushnil (L);
return 1;
}
out = rspamd_encode_base32 (part->fuzzy->hash_pipe,
strlen (part->fuzzy->hash_pipe));
lua_pushstring (L, out);
g_free (out);
return 1;
}
/***
* @method text_part:is_language()
* Returns the code of the most used unicode script in the text part. Does not work with raw parts
* @return {string} short abbreviation (such as `ru`) for the script's language
*/
static gint
lua_textpart_get_language (lua_State * L)
{
struct mime_text_part *part = lua_check_textpart (L);
if (part != NULL) {
if (part->lang_code != NULL && part->lang_code[0] != '\0') {
lua_pushstring (L, part->lang_code);
return 1;
}
}
lua_pushnil (L);
return 1;
}
/***
* @method text_part:compare_distance(other)
* Calculates the difference to another text part. This function is intended to work with
* the parts of `multipart/alternative` container only. If the two parts are not the parts of the
* same `multipart/alternative` container, then they are considered as unrelated and
* `-1` is returned.
* @param {text_part} other text part to compare
* @return {integer} commodity percentage (e.g. the same strings give `100`, different give `0` and unrelated give `-1`)
*/
static gint
lua_textpart_compare_distance (lua_State * L)
{
struct mime_text_part *part = lua_check_textpart (L), *other;
void *ud = luaL_checkudata (L, 2, "rspamd{textpart}");
gint diff = -1;
GMimeObject *parent;
const GMimeContentType *ct;
luaL_argcheck (L, ud != NULL, 2, "'textpart' expected");
other = ud ? *((struct mime_text_part **)ud) : NULL;
if (other != NULL && part->parent && part->parent == other->parent) {
parent = part->parent;
ct = g_mime_object_get_content_type (parent);
#ifndef GMIME24
if (ct == NULL ||
!g_mime_content_type_is_type (ct, "multipart", "alternative")) {
#else
if (ct == NULL ||
!g_mime_content_type_is_type ((GMimeContentType *)ct, "multipart",
"alternative")) {
#endif
diff = -1;
}
else {
if (!part->is_empty && !other->is_empty) {
if (part->diff_str != NULL && other->diff_str != NULL) {
diff = rspamd_diff_distance (part->diff_str,
other->diff_str);
}
else {
diff = rspamd_fuzzy_compare_parts (part, other);
}
}
else if ((part->is_empty &&
!other->is_empty) || (!part->is_empty && other->is_empty)) {
/* Empty and non empty parts are different */
diff = 0;
}
}
}
else {
diff = -1;
}
lua_pushinteger (L, diff);
return 1;
}
/* Mimepart implementation */
static gint
lua_mimepart_get_content (lua_State * L)
{
struct mime_part *part = lua_check_mimepart (L);
if (part == NULL) {
lua_pushnil (L);
return 1;
}
lua_pushlstring (L, (const gchar *)part->content->data, part->content->len);
return 1;
}
static gint
lua_mimepart_get_length (lua_State * L)
{
struct mime_part *part = lua_check_mimepart (L);
if (part == NULL) {
lua_pushnil (L);
return 1;
}
lua_pushinteger (L, part->content->len);
return 1;
}
static gint
lua_mimepart_get_type (lua_State * L)
{
struct mime_part *part = lua_check_mimepart (L);
if (part == NULL) {
lua_pushnil (L);
lua_pushnil (L);
return 2;
}
#ifndef GMIME24
lua_pushstring (L, part->type->type);
lua_pushstring (L, part->type->subtype);
#else
lua_pushstring (L, g_mime_content_type_get_media_type (part->type));
lua_pushstring (L, g_mime_content_type_get_media_subtype (part->type));
#endif
return 2;
}
static gint
lua_mimepart_get_filename (lua_State * L)
{
struct mime_part *part = lua_check_mimepart (L);
if (part == NULL || part->filename == NULL) {
lua_pushnil (L);
return 1;
}
lua_pushstring (L, part->filename);
return 1;
}
/* Image functions */
static gint
lua_image_get_width (lua_State *L)
{
struct rspamd_image *img = lua_check_image (L);
if (img != NULL) {
lua_pushnumber (L, img->width);
}
else {
lua_pushnumber (L, 0);
}
return 1;
}
static gint
lua_image_get_height (lua_State *L)
{
struct rspamd_image *img = lua_check_image (L);
if (img != NULL) {
lua_pushnumber (L, img->height);
}
else {
lua_pushnumber (L, 0);
}
return 1;
}
static gint
lua_image_get_type (lua_State *L)
{
struct rspamd_image *img = lua_check_image (L);
if (img != NULL) {
lua_pushstring (L, image_type_str (img->type));
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_image_get_size (lua_State *L)
{
struct rspamd_image *img = lua_check_image (L);
if (img != NULL) {
lua_pushinteger (L, img->data->len);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_image_get_filename (lua_State *L)
{
struct rspamd_image *img = lua_check_image (L);
if (img != NULL && img->filename != NULL) {
lua_pushstring (L, img->filename);
}
else {
lua_pushnil (L);
}
return 1;
}
/* URL part */
static gint
lua_url_get_length (lua_State *L)
{
struct uri *url = lua_check_url (L);
if (url != NULL) {
lua_pushinteger (L, strlen (struri (url)));
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_url_get_host (lua_State *L)
{
struct uri *url = lua_check_url (L);
if (url != NULL) {
lua_pushlstring (L, url->host, url->hostlen);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_url_get_user (lua_State *L)
{
struct uri *url = lua_check_url (L);
if (url != NULL && url->user != NULL) {
lua_pushlstring (L, url->user, url->userlen);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_url_get_path (lua_State *L)
{
struct uri *url = lua_check_url (L);
if (url != NULL) {
lua_pushlstring (L, url->data, url->datalen);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_url_get_text (lua_State *L)
{
struct uri *url = lua_check_url (L);
if (url != NULL) {
lua_pushstring (L, struri (url));
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_url_is_phished (lua_State *L)
{
struct uri *url = lua_check_url (L);
if (url != NULL) {
lua_pushboolean (L, url->is_phished);
}
else {
lua_pushnil (L);
}
return 1;
}
static gint
lua_url_get_phished (lua_State *L)
{
struct uri **purl, *url = lua_check_url (L);
if (url) {
if (url->is_phished && url->phished_url != NULL) {
purl = lua_newuserdata (L, sizeof (struct uri *));
rspamd_lua_setclass (L, "rspamd{url}", -1);
*purl = url->phished_url;
return 1;
}
}
lua_pushnil (L);
return 1;
}
/* Init part */
static gint
lua_load_task (lua_State * L)
{
lua_newtable (L);
luaL_register (L, NULL, tasklib_f);
return 1;
}
void
luaopen_task (lua_State * L)
{
rspamd_lua_new_class (L, "rspamd{task}", tasklib_m);
lua_pop (L, 1); /* remove metatable from stack */
rspamd_lua_add_preload (L, "rspamd_task", lua_load_task);
}
void
luaopen_textpart (lua_State * L)
{
rspamd_lua_new_class (L, "rspamd{textpart}", textpartlib_m);
luaL_register (L, "rspamd_textpart", null_reg);
lua_pop (L, 1); /* remove metatable from stack */
}
void
luaopen_mimepart (lua_State * L)
{
rspamd_lua_new_class (L, "rspamd{mimepart}", mimepartlib_m);
lua_pop (L, 1); /* remove metatable from stack */
}
void
luaopen_image (lua_State * L)
{
rspamd_lua_new_class (L, "rspamd{image}", imagelib_m);
lua_pop (L, 1); /* remove metatable from stack */
}
void
luaopen_url (lua_State * L)
{
rspamd_lua_new_class (L, "rspamd{url}", urllib_m);
lua_pop (L, 1); /* remove metatable from stack */
}
|