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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 "config.h"
#include "main.h"
#include "util.h"
#include "view.h"
#include "expressions.h"
#include "cfg_file.h"
#include "map.h"
struct rspamd_view *
init_view (struct config_file *cfg, memory_pool_t * pool)
{
struct rspamd_view *new;
new = memory_pool_alloc0 (pool, sizeof (struct rspamd_view));
new->pool = pool;
new->from_hash = g_hash_table_new (rspamd_strcase_hash, rspamd_strcase_equal);
new->symbols_hash = g_hash_table_new (rspamd_strcase_hash, rspamd_strcase_equal);
new->rcpt_hash = g_hash_table_new (rspamd_strcase_hash, rspamd_strcase_equal);
new->ip_tree = radix_tree_create ();
new->client_ip_tree = radix_tree_create ();
new->cfg = cfg;
memory_pool_add_destructor (new->pool, (pool_destruct_func) g_hash_table_destroy, new->symbols_hash);
return new;
}
gboolean
add_view_from (struct rspamd_view * view, gchar *line)
{
struct rspamd_regexp *re = NULL;
if (add_map (view->cfg, line, "SMTP From view", read_host_list, fin_host_list, (void **)&view->from_hash)) {
return TRUE;
}
else if ((re = parse_regexp (view->pool, line, TRUE)) != NULL) {
view->from_re_list = g_list_prepend (view->from_re_list, re);
return TRUE;
}
return FALSE;
}
gboolean
add_view_rcpt (struct rspamd_view * view, gchar *line)
{
struct rspamd_regexp *re = NULL;
if (add_map (view->cfg, line, "Recipients view", read_host_list, fin_host_list, (void **)&view->rcpt_hash)) {
return TRUE;
}
else if ((re = parse_regexp (view->pool, line, TRUE)) != NULL) {
view->rcpt_re_list = g_list_prepend (view->rcpt_re_list, re);
return TRUE;
}
return FALSE;
}
gboolean
add_view_symbols (struct rspamd_view * view, gchar *line)
{
struct rspamd_regexp *re = NULL;
GList *symbols;
if (add_map (view->cfg, line, "Symbols view", read_host_list, fin_host_list, (void **)&view->symbols_hash)) {
return TRUE;
}
else if ((re = parse_regexp (view->pool, line, TRUE)) != NULL) {
view->symbols_re_list = g_list_prepend (view->symbols_re_list, re);
return TRUE;
}
else {
/* Try to parse symbols line as comma separated list */
symbols = parse_comma_list (view->pool, line);
while (symbols) {
g_hash_table_insert (view->symbols_hash, (gchar *)symbols->data, symbols->data);
/* Symbols list would be free at pool destruction */
symbols = g_list_next (symbols);
}
}
return FALSE;
}
gboolean
add_view_ip (struct rspamd_view * view, gchar *line)
{
if (add_map (view->cfg, line, "IP view", read_radix_list, fin_radix_list, (void **)&view->ip_tree)) {
return TRUE;
}
return FALSE;
}
gboolean
add_view_client_ip (struct rspamd_view * view, gchar *line)
{
if (add_map (view->cfg, line, "Client IP view", read_radix_list, fin_radix_list, (void **)&view->client_ip_tree)) {
return TRUE;
}
return FALSE;
}
static struct rspamd_view *
find_view_by_ip (GList * views, struct worker_task *task)
{
GList *cur;
struct rspamd_view *v;
#ifdef HAVE_INET_PTON
if (task->from_addr.ipv6 || task->from_addr.d.in4.s_addr == INADDR_NONE) {
return NULL;
}
cur = views;
while (cur) {
v = cur->data;
if (radix32tree_find (v->ip_tree, ntohl (task->from_addr.d.in4.s_addr)) != RADIX_NO_VALUE) {
return v;
}
cur = g_list_next (cur);
}
return NULL;
#else
if (task->from_addr.s_addr == INADDR_NONE) {
return NULL;
}
cur = views;
while (cur) {
v = cur->data;
if (radix32tree_find (v->ip_tree, ntohl (task->from_addr.s_addr)) != RADIX_NO_VALUE) {
return v;
}
cur = g_list_next (cur);
}
return NULL;
#endif
}
static struct rspamd_view *
find_view_by_client_ip (GList * views, struct worker_task *task)
{
GList *cur;
struct rspamd_view *v;
if (task->client_addr.s_addr == INADDR_NONE) {
return NULL;
}
cur = views;
while (cur) {
v = cur->data;
if (radix32tree_find (v->client_ip_tree, ntohl (task->client_addr.s_addr)) != RADIX_NO_VALUE) {
msg_info ("found view for client ip %s", inet_ntoa (task->client_addr));
return v;
}
cur = g_list_next (cur);
}
return NULL;
}
static struct rspamd_view *
find_view_by_from (GList * views, struct worker_task *task)
{
GList *cur, *cur_re;
struct rspamd_view *v;
struct rspamd_regexp *re;
gchar *from_domain;
if (task->from == NULL) {
return NULL;
}
cur = views;
while (cur) {
v = cur->data;
/* First try to lookup in hashtable domain name */
if ((from_domain = strchr (task->from, '@')) != NULL) {
from_domain ++;
if (g_hash_table_lookup (v->from_hash, from_domain) != NULL) {
msg_info ("found view for client from %s", task->from);
return v;
}
}
if (g_hash_table_lookup (v->from_hash, task->from) != NULL) {
msg_info ("found view for client from %s", task->from);
return v;
}
/* Then try to match re */
cur_re = v->from_re_list;
while (cur_re) {
re = cur_re->data;
if (g_regex_match (re->regexp, task->from, 0, NULL) == TRUE) {
msg_info ("found view for client from %s", task->from);
return v;
}
cur_re = g_list_next (cur_re);
}
cur = g_list_next (cur);
}
return NULL;
}
static inline gboolean
check_view_rcpt (struct rspamd_view *v, struct worker_task *task)
{
GList *cur, *cur_re;
gchar rcpt_user[256], *p;
gint l;
struct rspamd_regexp *re;
cur = task->rcpt;
while (cur) {
if ((p = strchr (cur->data, '@')) != NULL) {
l = MIN ((gint)sizeof (rcpt_user) - 1, p - (gchar *)cur->data);
memcpy (rcpt_user, cur->data, l);
rcpt_user[l] = '\0';
/* First try to lookup in hashtable */
if (g_hash_table_lookup (v->rcpt_hash, rcpt_user) != NULL) {
msg_info ("found view for client rcpt %s", rcpt_user);
return TRUE;
}
/* Then try to match re */
cur_re = v->rcpt_re_list;
while (cur_re) {
re = cur_re->data;
if (g_regex_match (re->regexp, rcpt_user, 0, NULL) == TRUE) {
msg_info ("found view for client rcpt %s", rcpt_user);
return TRUE;
}
cur_re = g_list_next (cur_re);
}
}
/* Now check the whole recipient */
if (g_hash_table_lookup (v->rcpt_hash, cur->data) != NULL) {
msg_info ("found view for client rcpt %s", rcpt_user);
return TRUE;
}
/* Then try to match re */
cur_re = v->rcpt_re_list;
while (cur_re) {
re = cur_re->data;
if (g_regex_match (re->regexp, cur->data, 0, NULL) == TRUE) {
msg_info ("found view for client rcpt %s", rcpt_user);
return TRUE;
}
cur_re = g_list_next (cur_re);
}
cur = g_list_next (cur);
}
return FALSE;
}
static struct rspamd_view *
find_view_by_rcpt (GList * views, struct worker_task *task)
{
GList *cur;
struct rspamd_view *v;
if (task->from == NULL) {
return NULL;
}
cur = views;
while (cur) {
v = cur->data;
if (check_view_rcpt (v, task)) {
return v;
}
cur = g_list_next (cur);
}
return NULL;
}
static gboolean
match_view_symbol (struct rspamd_view *v, const gchar *symbol)
{
GList *cur;
struct rspamd_regexp *re;
/* Special case */
if (symbol == NULL) {
return TRUE;
}
/* First try to lookup in hashtable */
if (g_hash_table_lookup (v->symbols_hash, symbol) != NULL) {
return TRUE;
}
/* Then try to match re */
cur = v->symbols_re_list;
while (cur) {
re = cur->data;
if (g_regex_match (re->regexp, symbol, 0, NULL) == TRUE) {
return TRUE;
}
cur = g_list_next (cur);
}
return FALSE;
}
gboolean
check_view (GList * views, const gchar *symbol, struct worker_task * task)
{
struct rspamd_view *selected = NULL;
if (views == NULL || (task->view == NULL && task->view_checked == TRUE)) {
/* If now views defined just return TRUE to check each symbol */
return TRUE;
}
if (task->view != NULL) {
goto check_symbol;
}
if ((selected = find_view_by_ip (views, task)) == NULL) {
if ((selected = find_view_by_client_ip (views, task)) == NULL) {
if ((selected = find_view_by_from (views, task)) == NULL) {
if ((selected = find_view_by_rcpt (views, task)) == NULL) {
/* No matching view for this task */
task->view_checked = TRUE;
return TRUE;
}
}
}
}
task->view_checked = TRUE;
task->view = selected;
check_symbol:
/* selected is now not NULL */
if (task->view->skip_check) {
return FALSE;
}
if (match_view_symbol (task->view, symbol)) {
return TRUE;
}
return FALSE;
}
gboolean
check_skip (GList * views, struct worker_task * task)
{
if (check_view (views, NULL, task) == FALSE) {
return TRUE;
}
return FALSE;
}
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