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/*
* Storage implementation for antispam plugin
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
*
* Derived from Quota plugin:
* Copyright (C) 2005 Timo Sirainen
*/
#include <sys/stat.h>
#include "lib.h"
#include "array.h"
#include "istream.h"
#include "mail-search.h"
#include "mail-storage-private.h"
#include "antispam-plugin.h"
#define ANTISPAM_CONTEXT(obj) \
*((void **)array_idx_modifyable(&(obj)->module_contexts, \
antispam_storage_module_id))
struct antispam_mail_storage {
struct mail_storage_vfuncs super;
struct antispam *antispam;
};
enum mailbox_move_type {
MMT_UNINTERESTING,
MMT_FROM_SPAM,
MMT_TO_SPAM,
};
struct antispam_mailbox {
struct mailbox_vfuncs super;
enum mailbox_move_type movetype;
unsigned int save_hack:1;
};
static unsigned int antispam_storage_module_id = 0;
static bool antispam_storage_module_id_set = FALSE;
static int
antispam_copy(struct mailbox_transaction_context *t, struct mail *mail,
enum mail_flags flags, struct mail_keywords *keywords,
struct mail *dest_mail)
{
struct antispam_mailbox *asbox = ANTISPAM_CONTEXT(t->box);
struct antispam_transaction_context *ast =
ANTISPAM_CONTEXT(t);
struct mail *copy_dest_mail;
int ret;
if (dest_mail != NULL)
copy_dest_mail = dest_mail;
else
copy_dest_mail = mail_alloc(t, MAIL_FETCH_PHYSICAL_SIZE, NULL);
i_assert(mail->box);
asbox->save_hack = FALSE;
asbox->movetype = MMT_UNINTERESTING;
if (!mailbox_is_trash(mail->box) &&
!mailbox_is_trash(t->box)) {
bool src_spam = mailbox_is_spam(mail->box);
bool dst_spam = mailbox_is_spam(t->box);
if (src_spam && !dst_spam)
asbox->movetype = MMT_FROM_SPAM;
else if (!src_spam && dst_spam)
asbox->movetype = MMT_TO_SPAM;
}
if (asbox->super.copy(t, mail, flags, keywords, copy_dest_mail) < 0)
return -1;
/*
* If copying used saving internally, we already have treated the mail
*/
if (asbox->save_hack || asbox->movetype == MMT_UNINTERESTING)
ret = 0;
else
ret = backend_handle_mail(t, ast, copy_dest_mail,
asbox->movetype == MMT_FROM_SPAM);
if (copy_dest_mail != dest_mail)
mail_free(©_dest_mail);
return ret;
}
static int antispam_save_finish(struct mail_save_context *ctx,
struct mail *dest_mail)
{
struct antispam_mailbox *asbox =
ANTISPAM_CONTEXT(ctx->transaction->box);
struct antispam_transaction_context *ast =
ANTISPAM_CONTEXT(ctx->transaction);
struct mail *save_dest_mail;
int ret;
if (dest_mail != NULL)
save_dest_mail = dest_mail;
else
save_dest_mail = mail_alloc(ctx->transaction,
MAIL_FETCH_PHYSICAL_SIZE, NULL);
if (asbox->super.save_finish(ctx, save_dest_mail) < 0)
return -1;
asbox->save_hack = TRUE;
if (asbox->movetype != MMT_UNINTERESTING)
ret = backend_handle_mail(ctx->transaction, ast, save_dest_mail,
asbox->movetype == MMT_FROM_SPAM);
else
ret = 0;
if (save_dest_mail != dest_mail)
mail_free(&save_dest_mail);
return ret;
}
static struct antispam_transaction_context *
antispam_transaction_begin(struct mailbox *box)
{
struct antispam_transaction_context *ast;
ast = backend_start(box);
i_assert(ast != NULL);
return ast;
}
static void
antispam_transaction_rollback(struct antispam_transaction_context **_ast)
{
struct antispam_transaction_context *ast = *_ast;
backend_rollback(ast);
*_ast = NULL;
}
static int
antispam_transaction_commit(struct mailbox_transaction_context *ctx,
struct antispam_transaction_context **_ast)
{
struct antispam_transaction_context *ast = *_ast;
int ret;
ret = backend_commit(ctx, ast);
*_ast = NULL;
return ret;
}
static struct mailbox_transaction_context *
antispam_mailbox_transaction_begin(struct mailbox *box,
enum mailbox_transaction_flags flags)
{
struct antispam_mailbox *asbox = ANTISPAM_CONTEXT(box);
struct mailbox_transaction_context *t;
struct antispam_transaction_context *ast;
t = asbox->super.transaction_begin(box, flags);
ast = antispam_transaction_begin(box);
array_idx_set(&t->module_contexts, antispam_storage_module_id, &ast);
return t;
}
static int
antispam_mailbox_transaction_commit(struct mailbox_transaction_context *ctx,
enum mailbox_sync_flags flags)
{
struct antispam_mailbox *asbox = ANTISPAM_CONTEXT(ctx->box);
struct antispam_transaction_context *ast = ANTISPAM_CONTEXT(ctx);
if (antispam_transaction_commit(ctx, &ast) < 0) {
asbox->super.transaction_rollback(ctx);
return -1;
} else
return asbox->super.transaction_commit(ctx, flags);
}
static void
antispam_mailbox_transaction_rollback(struct mailbox_transaction_context *ctx)
{
struct antispam_mailbox *asbox = ANTISPAM_CONTEXT(ctx->box);
struct antispam_transaction_context *ast = ANTISPAM_CONTEXT(ctx);
antispam_transaction_rollback(&ast);
asbox->super.transaction_rollback(ctx);
}
static struct mailbox *antispam_mailbox_open(struct mail_storage *storage,
const char *name,
struct istream *input,
enum mailbox_open_flags flags)
{
struct antispam_mail_storage *as_storage = ANTISPAM_CONTEXT(storage);
struct mailbox *box;
struct antispam_mailbox *asbox;
box = as_storage->super.mailbox_open(storage, name, input, flags);
if (box == NULL)
return NULL;
asbox = p_new(box->pool, struct antispam_mailbox, 1);
asbox->super = box->v;
box->v.save_finish = antispam_save_finish;
box->v.transaction_begin = antispam_mailbox_transaction_begin;
box->v.transaction_commit = antispam_mailbox_transaction_commit;
box->v.transaction_rollback = antispam_mailbox_transaction_rollback;
box->v.copy = antispam_copy;
array_idx_set(&box->module_contexts, antispam_storage_module_id,
&asbox);
return box;
}
void antispam_mail_storage_created(struct mail_storage *storage)
{
struct antispam_mail_storage *as_storage;
if (antispam_next_hook_mail_storage_created != NULL)
antispam_next_hook_mail_storage_created(storage);
as_storage = p_new(storage->pool, struct antispam_mail_storage, 1);
as_storage->super = storage->v;
storage->v.mailbox_open = antispam_mailbox_open;
if (!antispam_storage_module_id_set) {
antispam_storage_module_id = mail_storage_module_id++;
antispam_storage_module_id_set = TRUE;
}
array_idx_set(&storage->module_contexts,
antispam_storage_module_id, &as_storage);
}
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