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/*-
* Copyright 2016 Vsevolod Stakhov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include "libutil/util.h"
#include "libserver/cfg_file.h"
#include "libserver/cfg_rcl.h"
#include "libserver/worker_util.h"
#include "libserver/rspamd_control.h"
#include "libutil/addr.h"
#include "lua/lua_common.h"
#include "unix-std.h"
#include "utlist.h"
#ifdef HAVE_GLOB_H
#include <glob.h>
#endif
static gpointer init_log_helper (struct rspamd_config *cfg);
static void start_log_helper (struct rspamd_worker *worker);
worker_t log_helper_worker = {
"log_helper", /* Name */
init_log_helper, /* Init function */
start_log_helper, /* Start function */
RSPAMD_WORKER_UNIQUE | RSPAMD_WORKER_KILLABLE,
RSPAMD_WORKER_SOCKET_NONE, /* No socket */
RSPAMD_WORKER_VER /* Version info */
};
static const guint64 rspamd_log_helper_magic = 0x1090bb46aaa74c9aULL;
/*
* Worker's context
*/
struct log_helper_ctx {
guint64 magic;
/* Events base */
struct event_base *ev_base;
/* DNS resolver */
struct rspamd_dns_resolver *resolver;
/* Config */
struct rspamd_config *cfg;
/* END OF COMMON PART */
struct event log_ev;
struct rspamd_worker_lua_script *scripts;
lua_State *L;
gint pair[2];
};
static gpointer
init_log_helper (struct rspamd_config *cfg)
{
struct log_helper_ctx *ctx;
GQuark type;
type = g_quark_try_string ("log_helper");
(void)type;
ctx = rspamd_mempool_alloc (cfg->cfg_pool, sizeof (*ctx));
ctx->magic = rspamd_log_helper_magic;
ctx->cfg = cfg;
return ctx;
}
static void
rspamd_log_helper_read (gint fd, short what, gpointer ud)
{
struct log_helper_ctx *ctx = ud;
guchar buf[8192];
gssize r;
guint32 n, i, nextra;
struct rspamd_protocol_log_message_sum *sm;
struct rspamd_worker_lua_script *sc;
struct rspamd_config **pcfg;
struct event_base **pevbase;
r = read (fd, buf, sizeof (buf));
if (r >= (gssize)sizeof (struct rspamd_protocol_log_message_sum)) {
memcpy (&n, buf, sizeof (n));
memcpy (&nextra, buf + sizeof (n), sizeof (nextra));
if (n + nextra !=
(r - sizeof (*sm)) / sizeof (struct rspamd_protocol_log_symbol_result)) {
msg_warn ("cannot read data from log pipe: bad length: %d elements "
"announced but %d available", n + nextra,
(gint)((r - sizeof (*sm)) /
sizeof (struct rspamd_protocol_log_symbol_result)));
}
else {
sm = g_malloc (r);
memcpy (sm, buf, r);
DL_FOREACH (ctx->scripts, sc) {
lua_rawgeti (ctx->L, LUA_REGISTRYINDEX, sc->cbref);
lua_pushnumber (ctx->L, sm->score);
lua_pushnumber (ctx->L, sm->required_score);
lua_createtable (ctx->L, n, 0);
for (i = 0; i < n; i ++) {
lua_createtable (ctx->L, 2, 0);
lua_pushnumber (ctx->L, sm->results[i].id);
lua_rawseti (ctx->L, -2, 1);
lua_pushnumber (ctx->L, sm->results[i].score);
lua_rawseti (ctx->L, -2, 2);
lua_rawseti (ctx->L, -2, (i + 1));
}
pcfg = lua_newuserdata (ctx->L, sizeof (*pcfg));
*pcfg = ctx->cfg;
rspamd_lua_setclass (ctx->L, "rspamd{config}", -1);
lua_pushnumber (ctx->L, sm->settings_id);
lua_createtable (ctx->L, nextra, 0);
for (i = 0; i < nextra; i ++) {
lua_createtable (ctx->L, 2, 0);
lua_pushnumber (ctx->L, sm->results[i + n].id);
lua_rawseti (ctx->L, -2, 1);
lua_pushnumber (ctx->L, sm->results[i + n].score);
lua_rawseti (ctx->L, -2, 2);
lua_rawseti (ctx->L, -2, (i + 1));
}
pevbase = lua_newuserdata (ctx->L, sizeof (*pevbase));
*pevbase = ctx->ev_base;
rspamd_lua_setclass (ctx->L, "rspamd{ev_base}", -1);
if (lua_pcall (ctx->L, 7, 0, 0) != 0) {
msg_err ("error executing log handler code: %s",
lua_tostring (ctx->L, -1));
lua_pop (ctx->L, 1);
}
}
g_free (sm);
}
}
else if (r == -1) {
if (errno != EAGAIN || errno != EINTR) {
msg_warn ("cannot read data from log pipe: %s", strerror (errno));
event_del (&ctx->log_ev);
}
}
else if (r == 0) {
msg_warn ("cannot read data from log pipe: EOF");
event_del (&ctx->log_ev);
}
}
static void
rspamd_log_helper_reply_handler (struct rspamd_worker *worker,
struct rspamd_srv_reply *rep, gint rep_fd,
gpointer ud)
{
struct log_helper_ctx *ctx = ud;
close (ctx->pair[1]);
msg_info ("start waiting for log events");
event_set (&ctx->log_ev, ctx->pair[0], EV_READ | EV_PERSIST,
rspamd_log_helper_read, ctx);
event_base_set (ctx->ev_base, &ctx->log_ev);
event_add (&ctx->log_ev, NULL);
}
static void
start_log_helper (struct rspamd_worker *worker)
{
struct log_helper_ctx *ctx = worker->ctx;
gssize r = -1;
gint nscripts = 0;
struct rspamd_worker_lua_script *tmp;
static struct rspamd_srv_command srv_cmd;
ctx->ev_base = rspamd_prepare_worker (worker,
"log_helper",
NULL);
ctx->cfg = worker->srv->cfg;
ctx->scripts = worker->cf->scripts;
ctx->L = ctx->cfg->lua_state;
ctx->resolver = dns_resolver_init (worker->srv->logger,
ctx->ev_base,
worker->srv->cfg);
rspamd_upstreams_library_config (worker->srv->cfg, ctx->cfg->ups_ctx,
ctx->ev_base, ctx->resolver->r);
DL_COUNT (worker->cf->scripts, tmp, nscripts);
msg_info ("started log_helper worker with %d scripts", nscripts);
r = rspamd_socketpair (ctx->pair, FALSE);
if (r == -1) {
msg_err ("cannot create socketpair: %s, exiting now", strerror (errno));
/* Prevent new processes spawning */
exit (EXIT_SUCCESS);
}
memset (&srv_cmd, 0, sizeof (srv_cmd));
srv_cmd.type = RSPAMD_SRV_LOG_PIPE;
srv_cmd.cmd.log_pipe.type = RSPAMD_LOG_PIPE_SYMBOLS;
/* Wait for startup being completed */
rspamd_mempool_lock_mutex (worker->srv->start_mtx);
rspamd_srv_send_command (worker, ctx->ev_base, &srv_cmd, ctx->pair[1],
rspamd_log_helper_reply_handler, ctx);
rspamd_mempool_unlock_mutex (worker->srv->start_mtx);
rspamd_lua_run_postloads (ctx->cfg->lua_state, ctx->cfg, ctx->ev_base,
worker);
event_base_loop (ctx->ev_base, 0);
close (ctx->pair[0]);
rspamd_worker_block_signals ();
rspamd_log_close (worker->srv->logger);
REF_RELEASE (ctx->cfg);
exit (EXIT_SUCCESS);
}
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