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/*
* antispam plugin for dovecot
*
* Copyright (C) 2004-2007 Johannes Berg <johannes@sipsolutions.net>
* 2006 Frank Cusack
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License Version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*
* based on the original framework http://www.dovecot.org/patches/1.0/copy_plugin.c
*
* Please see http://johannes.sipsolutions.net/wiki/Projects/dovecot-dspam-integration
* for more information on this code.
*
* Install the plugin in the usual dovecot module location.
*/
#include <stdlib.h>
/* dovecot headers we need */
#include "lib.h"
#include "str.h"
#include "client.h"
#include "mail-storage-private.h"
/* defined by imap, pop3, lda */
extern void (*hook_mail_storage_created)(struct mail_storage *storage);
/* internal stuff we need */
#include "antispam-plugin.h"
#ifdef CONFIG_DOVECOT_11
uint32_t PLUGIN_FUNCTION(id) = 0;
#endif
static pool_t global_pool;
static char **trash_folders = NULL;
static char *default_spam_folders[] = {
"SPAM",
NULL
};
static char **spam_folders = default_spam_folders;
static char **unsure_folders = NULL;
bool antispam_can_append_to_spam = FALSE;
static char **spam_keywords = NULL;
bool need_keyword_hook;
bool need_folder_hook;
static bool mailbox_in_list(struct mailbox *box, char **list)
{
if (!list)
return FALSE;
while (*list) {
if (mailbox_equals(box, box->storage, *list))
return TRUE;
list++;
}
return FALSE;
}
bool mailbox_is_spam(struct mailbox *box)
{
debug_verbose("mailbox_is_spam(%s)\n", mailbox_get_name(box));
return mailbox_in_list(box, spam_folders);
}
bool mailbox_is_trash(struct mailbox *box)
{
debug_verbose("mailbox_is_trash(%s)\n", mailbox_get_name(box));
return mailbox_in_list(box, trash_folders);
}
bool mailbox_is_unsure(struct mailbox *box)
{
debug_verbose("mailbox_is_unsure(%s)\n", mailbox_get_name(box));
return mailbox_in_list(box, unsure_folders);
}
bool keyword_is_spam(const char *keyword)
{
char **k = spam_keywords;
if (!spam_keywords)
return FALSE;
while (*k) {
if (strcmp(*k, keyword) == 0)
return TRUE;
k++;
}
return FALSE;
}
const char *get_setting(const char *name)
{
const char *env;
t_push();
env = t_strconcat(t_str_ucase(stringify(PLUGINNAME)),
"_",
name,
NULL);
env = getenv(env);
t_pop();
return env;
}
void PLUGIN_FUNCTION(init)(void)
{
const char *tmp;
char * const *iter;
int spam_folder_count = 0;
debug("plugin initialising\n");
global_pool = pool_alloconly_create("antispam-pool", 1024);
tmp = get_setting("TRASH");
if (tmp)
trash_folders = p_strsplit(global_pool, tmp, ";");
if (trash_folders) {
iter = trash_folders;
while (*iter) {
debug("\"%s\" is trash folder\n", *iter);
iter++;
}
} else
debug("no trash folders\n");
tmp = get_setting("SPAM");
if (tmp)
spam_folders = p_strsplit(global_pool, tmp, ";");
if (spam_folders) {
iter = spam_folders;
while (*iter) {
debug("\"%s\" is spam folder\n", *iter);
iter++;
spam_folder_count++;
}
} else
debug("no spam folders\n");
tmp = get_setting("UNSURE");
if (tmp)
unsure_folders = p_strsplit(global_pool, tmp, ";");
if (unsure_folders) {
iter = unsure_folders;
while (*iter) {
debug("\"%s\" is unsure folder\n", *iter);
iter++;
}
} else
debug("no unsure folders\n");
tmp = get_setting("ALLOW_APPEND_TO_SPAM");
if (tmp && strcasecmp(tmp, "yes") == 0) {
antispam_can_append_to_spam = TRUE;
debug("allowing APPEND to spam folders");
}
tmp = get_setting("SPAM_KEYWORDS");
if (tmp)
spam_keywords = p_strsplit(global_pool, tmp, ";");
if (spam_keywords) {
iter = spam_keywords;
while (*iter) {
debug("\"%s\" is spam keyword\n", *iter);
iter++;
}
}
/* set spam_folders to empty to only allow keywords */
need_folder_hook = spam_folder_count > 0;
need_keyword_hook = !!spam_keywords;
backend_init(global_pool);
antispam_next_hook_mail_storage_created = hook_mail_storage_created;
hook_mail_storage_created = antispam_mail_storage_created;
}
void PLUGIN_FUNCTION(deinit)(void)
{
hook_mail_storage_created = antispam_next_hook_mail_storage_created;
backend_exit();
mempool_unref(&global_pool);
}
/* put dovecot version we built against into plugin for checking */
const char *PLUGIN_FUNCTION(version) = PACKAGE_VERSION;
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