static void
dkim_sign_callback (struct rspamd_task *task, void *unused)
{
lua_State *L;
struct rspamd_task **ptask;
gboolean sign = FALSE;
gint err_idx;
GString *tb, *hdr;
GError *err = NULL;
const gchar *selector = NULL, *domain = NULL, *key = NULL;
rspamd_dkim_sign_context_t *ctx;
rspamd_dkim_sign_key_t *dkim_key;
if (dkim_module_ctx->sign_condition_ref != -1) {
sign = FALSE;
L = task->cfg->lua_state;
lua_pushcfunction (L, &rspamd_lua_traceback);
err_idx = lua_gettop (L);
lua_rawgeti (L, LUA_REGISTRYINDEX, dkim_module_ctx->sign_condition_ref);
ptask = lua_newuserdata (L, sizeof (struct rspamd_task *));
*ptask = task;
rspamd_lua_setclass (L, "rspamd{task}", -1);
if (lua_pcall (L, 1, 1, err_idx) != 0) {
tb = lua_touserdata (L, -1);
msg_err_task ("call to user extraction script failed: %v", tb);
g_string_free (tb, TRUE);
}
else {
if (lua_istable (L, -1)) {
/*
* Get the following elements:
* - selector
* - domain
* - key
*/
if (!rspamd_lua_parse_table_arguments (L, -1, &err,
"*key=S;*domain=S;*selector=S",
&key, &domain, &selector)) {
msg_err_task ("invalid return value from sign condition: %e",
err);
g_error_free (err);
return;
}
dkim_key = rspamd_lru_hash_lookup (dkim_module_ctx->dkim_sign_hash,
key, time (NULL));
if (dkim_key == NULL) {
dkim_key = rspamd_dkim_sign_key_load (key, &err);
if (dkim_key == NULL) {
msg_err_task ("cannot load dkim key %s: %e",
key, err);
g_error_free (err);
return;
}
rspamd_lru_hash_insert (dkim_module_ctx->dkim_sign_hash,
g_strdup (key), dkim_key,
time (NULL), 0);
}
ctx = rspamd_create_dkim_sign_context (task, dkim_key,
DKIM_CANON_RELAXED, DKIM_CANON_RELAXED,
dkim_module_ctx->sign_headers, &err);
if (ctx == NULL) {
msg_err_task ("cannot create sign context: %e",
key, err);
g_error_free (err);
return;
}
hdr = rspamd_dkim_sign (task, selector, domain, 0, 0, ctx);
if (hdr) {
rspamd_mempool_set_variable (task->task_pool, "dkim-signature",
hdr, rspamd_gstring_free_hard);
}
sign = TRUE;
}
else {
sign = FALSE;
}
}
/* Result + error function */
lua_settop (L, 0);
if (!sign) {
msg_debug_task ("skip signing as dkim condition callback returned"
" false");
return;
}
}
}
gint
lua_dkim_sign_handler (lua_State *L)
{
struct rspamd_task *task = lua_check_task (L, 1);
luaL_argcheck (L, lua_type (L, 2) == LUA_TTABLE, 2, "'table' expected");
GError *err = NULL;
GString *hdr;
const gchar *selector = NULL, *domain = NULL, *key = NULL;
rspamd_dkim_sign_context_t *ctx;
rspamd_dkim_sign_key_t *dkim_key;
/*
* Get the following elements:
* - selector
* - domain
* - key
*/
if (!rspamd_lua_parse_table_arguments (L, 2, &err,
"*key=S;*domain=S;*selector=S",
&key, &domain, &selector)) {
msg_err_task ("invalid return value from sign condition: %e",
err);
g_error_free (err);
lua_pushboolean (L, FALSE);
return 1;
}
if (dkim_module_ctx->dkim_sign_hash == NULL) {
dkim_module_ctx->dkim_sign_hash = rspamd_lru_hash_new (
128,
g_free, /* Keys are just C-strings */
(GDestroyNotify)rspamd_dkim_sign_key_unref);
}
dkim_key = rspamd_lru_hash_lookup (dkim_module_ctx->dkim_sign_hash,
key, time (NULL));
if (dkim_key == NULL) {
dkim_key = rspamd_dkim_sign_key_load (key, &err);
if (dkim_key == NULL) {
msg_err_task ("cannot load dkim key %s: %e",
key, err);
g_error_free (err);
lua_pushboolean (L, FALSE);
return 1;
}
rspamd_lru_hash_insert (dkim_module_ctx->dkim_sign_hash,
g_strdup (key), dkim_key,
time (NULL), 0);
}
ctx = rspamd_create_dkim_sign_context (task, dkim_key,
DKIM_CANON_RELAXED, DKIM_CANON_RELAXED,
dkim_module_ctx->sign_headers, &err);
if (ctx == NULL) {
msg_err_task ("cannot create sign context: %e",
err);
g_error_free (err);
lua_pushboolean (L, FALSE);
return 1;
}
hdr = rspamd_dkim_sign (task, selector, domain, 0, 0, ctx);
if (hdr) {
rspamd_mempool_set_variable (task->task_pool, "dkim-signature",
hdr, rspamd_gstring_free_hard);
lua_pushboolean (L, TRUE);
return 1;
}
lua_pushboolean (L, FALSE);
return 1;
}
/***
* @function rspamd_fann.create_full(params)
* Creates new neural network with parameters:
* - `layers` {table/numbers}: table of layers in form: {N1, N2, N3 ... Nn} where N is number of neurons in a layer
* - `activation_hidden` {string}: activation function type for hidden layers (`tanh` by default)
* - `activation_output` {string}: activation function type for output layer (`tanh` by default)
* - `sparsed` {float}: create sparsed ANN, where number is a coefficient for sparsing
* - `learn` {string}: learning algorithm (quickprop, rprop or incremental)
* - `randomize` {boolean}: randomize weights (true by default)
* @return {fann} fann object
*/
static gint
lua_fann_create_full (lua_State *L)
{
#ifndef WITH_FANN
return 0;
#else
struct fann *f, **pfann;
guint nlayers, *layers, i;
const gchar *activation_hidden = NULL, *activation_output, *learn_alg = NULL;
gdouble sparsed = 0.0;
gboolean randomize_ann = TRUE;
GError *err = NULL;
if (lua_type (L, 1) == LUA_TTABLE) {
lua_pushstring (L, "layers");
lua_gettable (L, 1);
if (lua_type (L, -1) != LUA_TTABLE) {
return luaL_error (L, "bad layers attribute");
}
nlayers = rspamd_lua_table_size (L, -1);
if (nlayers < 2) {
return luaL_error (L, "bad layers attribute");
}
layers = g_new0 (guint, nlayers);
for (i = 0; i < nlayers; i ++) {
lua_rawgeti (L, -1, i + 1);
layers[i] = luaL_checknumber (L, -1);
lua_pop (L, 1);
}
lua_pop (L, 1); /* Table */
if (!rspamd_lua_parse_table_arguments (L, 1, &err,
"sparsed=N;randomize=B;learn=S;activation_hidden=S;activation_output=S",
&sparsed, &randomize_ann, &learn_alg, &activation_hidden, &activation_output)) {
g_free (layers);
if (err) {
gint r;
r = luaL_error (L, "invalid arguments: %s", err->message);
g_error_free (err);
return r;
}
else {
return luaL_error (L, "invalid arguments");
}
}
if (sparsed != 0.0) {
f = fann_create_standard_array (nlayers, layers);
}
else {
f = fann_create_sparse_array (sparsed, nlayers, layers);
}
if (f != NULL) {
pfann = lua_newuserdata (L, sizeof (gpointer));
*pfann = f;
rspamd_lua_setclass (L, "rspamd{fann}", -1);
}
else {
g_free (layers);
return luaL_error (L, "cannot create fann");
}
fann_set_activation_function_hidden (f,
string_to_activation_func (activation_hidden));
fann_set_activation_function_output (f,
string_to_activation_func (activation_output));
fann_set_training_algorithm (f, string_to_learn_alg (learn_alg));
if (randomize_ann) {
fann_randomize_weights (f, 0, 1);
}
g_free (layers);
}
else {
return luaL_error (L, "bad arguments");
}
return 1;
#endif
}
/**
* @method rspamd_fann:train_threaded(inputs, outputs, callback, event_base, {params})
* Trains neural network with batch of samples. Inputs and outputs should be tables of
* equal size, each row in table should be N inputs and M outputs, e.g.
* {{0, 1, 1}, ...} -> {{0}, {1} ...}
* @param {table} inputs input samples
* @param {table} outputs output samples
* @param {callback} function that is called when train is completed
*/
static gint
lua_fann_train_threaded (lua_State *L)
{
#ifndef WITH_FANN
return 0;
#else
struct fann *f = rspamd_lua_check_fann (L, 1);
guint ninputs, noutputs, ndata, i, j;
struct lua_fann_train_cbdata *cbdata;
struct event_base *ev_base = lua_check_ev_base (L, 5);
GError *err = NULL;
const guint max_epochs_default = 1000;
const gdouble desired_mse_default = 0.0001;
if (f != NULL && lua_type (L, 2) == LUA_TTABLE &&
lua_type (L, 3) == LUA_TTABLE && lua_type (L, 4) == LUA_TFUNCTION &&
ev_base != NULL) {
/* First check sanity, call for table.getn for that */
ndata = rspamd_lua_table_size (L, 2);
ninputs = fann_get_num_input (f);
noutputs = fann_get_num_output (f);
cbdata = g_malloc0 (sizeof (*cbdata));
cbdata->L = L;
cbdata->f = f;
cbdata->train = rspamd_fann_create_train (ndata, ninputs, noutputs);
lua_pushvalue (L, 4);
cbdata->cbref = luaL_ref (L, LUA_REGISTRYINDEX);
if (rspamd_socketpair (cbdata->pair, 0) == -1) {
msg_err ("cannot open socketpair: %s", strerror (errno));
cbdata->pair[0] = -1;
cbdata->pair[1] = -1;
goto err;
}
for (i = 0; i < ndata; i ++) {
lua_rawgeti (L, 2, i + 1);
if (rspamd_lua_table_size (L, -1) != ninputs) {
msg_err ("invalid number of inputs: %d, %d expected",
rspamd_lua_table_size (L, -1), ninputs);
goto err;
}
for (j = 0; j < ninputs; j ++) {
lua_rawgeti (L, -1, j + 1);
cbdata->train->input[i][j] = lua_tonumber (L, -1);
lua_pop (L, 1);
}
lua_pop (L, 1);
lua_rawgeti (L, 3, i + 1);
if (rspamd_lua_table_size (L, -1) != noutputs) {
msg_err ("invalid number of outputs: %d, %d expected",
rspamd_lua_table_size (L, -1), noutputs);
goto err;
}
for (j = 0; j < noutputs; j++) {
lua_rawgeti (L, -1, j + 1);
cbdata->train->output[i][j] = lua_tonumber (L, -1);
lua_pop (L, 1);
}
}
cbdata->max_epochs = max_epochs_default;
cbdata->desired_mse = desired_mse_default;
if (lua_type (L, 5) == LUA_TTABLE) {
rspamd_lua_parse_table_arguments (L, 5, NULL,
"max_epochs=I;desired_mse=N",
&cbdata->max_epochs, &cbdata->desired_mse);
}
/* Now we can call training in a separate thread */
rspamd_socket_nonblocking (cbdata->pair[0]);
event_set (&cbdata->io, cbdata->pair[0], EV_READ, lua_fann_thread_notify,
cbdata);
event_base_set (ev_base, &cbdata->io);
/* TODO: add timeout */
event_add (&cbdata->io, NULL);
cbdata->t = rspamd_create_thread ("fann train", lua_fann_train_thread,
cbdata, &err);
if (cbdata->t == NULL) {
msg_err ("cannot create training thread: %e", err);
if (err) {
g_error_free (err);
}
goto err;
}
}
else {
return luaL_error (L, "invalid arguments");
}
return 0;
err:
if (cbdata->pair[0] != -1) {
close (cbdata->pair[0]);
}
if (cbdata->pair[1] != -1) {
close (cbdata->pair[1]);
}
fann_destroy_train (cbdata->train);
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->cbref);
g_free (cbdata);
return luaL_error (L, "invalid arguments");
#endif
}
static gint
lua_worker_spawn_process (lua_State *L)
{
struct rspamd_worker *w = lua_check_worker (L, 1);
struct rspamd_lua_process_cbdata *cbdata;
struct rspamd_abstract_worker_ctx *actx;
struct rspamd_srv_command srv_cmd;
const gchar *cmdline = NULL, *input = NULL;
gsize inputlen = 0;
pid_t pid;
GError *err = NULL;
gint func_cbref, cb_cbref;
if (!rspamd_lua_parse_table_arguments (L, 2, &err,
"func=F;exec=S;stdin=V;*on_complete=F", &func_cbref,
&cmdline, &inputlen, &input, &cb_cbref)) {
msg_err ("cannot get parameters list: %e", err);
if (err) {
g_error_free (err);
}
return 0;
}
cbdata = g_malloc0 (sizeof (*cbdata));
cbdata->cb_cbref = cb_cbref;
cbdata->func_cbref = func_cbref;
if (input) {
cbdata->out_buf = g_string_new_len (input, inputlen);
cbdata->out_pos = 0;
}
if (rspamd_socketpair (cbdata->sp, TRUE) == -1) {
msg_err ("cannot spawn socketpair: %s", strerror (errno));
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->func_cbref);
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->cb_cbref);
g_free (cbdata);
return 0;
}
actx = w->ctx;
cbdata->wrk = w;
cbdata->L = L;
cbdata->ev_base = actx->ev_base;
cbdata->sz = (guint64)-1;
pid = fork ();
if (pid == -1) {
msg_err ("cannot spawn process: %s", strerror (errno));
close (cbdata->sp[0]);
close (cbdata->sp[1]);
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->func_cbref);
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->cb_cbref);
g_free (cbdata);
return 0;
}
else if (pid == 0) {
/* Child */
gint rc;
gchar inbuf[4];
rspamd_log_update_pid (w->cf->type, w->srv->logger);
rc = ottery_init (w->srv->cfg->libs_ctx->ottery_cfg);
if (rc != OTTERY_ERR_NONE) {
msg_err ("cannot initialize PRNG: %d", rc);
abort ();
}
rspamd_random_seed_fast ();
#ifdef HAVE_EVUTIL_RNG_INIT
evutil_secure_rng_init ();
#endif
close (cbdata->sp[0]);
/* Here we assume that we can block on writing results */
rspamd_socket_blocking (cbdata->sp[1]);
event_reinit (cbdata->ev_base);
g_hash_table_remove_all (w->signal_events);
rspamd_worker_unblock_signals ();
rspamd_lua_execute_lua_subprocess (L, cbdata);
/* Wait for parent to reply and exit */
rc = read (cbdata->sp[1], inbuf, sizeof (inbuf));
if (memcmp (inbuf, "\0\0\0\0", 4) == 0) {
exit (EXIT_SUCCESS);
}
else {
msg_err ("got invalid reply from parent");
exit (EXIT_FAILURE);
}
}
cbdata->cpid = pid;
cbdata->io_buf = g_string_sized_new (8);
/* Notify main */
memset (&srv_cmd, 0, sizeof (srv_cmd));
srv_cmd.type = RSPAMD_SRV_ON_FORK;
srv_cmd.cmd.on_fork.state = child_create;
srv_cmd.cmd.on_fork.cpid = pid;
srv_cmd.cmd.on_fork.ppid = getpid ();
rspamd_srv_send_command (w, cbdata->ev_base, &srv_cmd, -1, NULL, NULL);
close (cbdata->sp[1]);
rspamd_socket_nonblocking (cbdata->sp[0]);
/* Parent */
rspamd_worker_set_signal_handler (SIGCHLD, w, cbdata->ev_base,
rspamd_lua_cld_handler,
cbdata);
/* Add result pipe waiting */
event_set (&cbdata->ev, cbdata->sp[0], EV_READ | EV_PERSIST,
rspamd_lua_subprocess_io, cbdata);
event_base_set (cbdata->ev_base, &cbdata->ev);
/* TODO: maybe add timeout? */
event_add (&cbdata->ev, NULL);
return 0;
}
