xref: /unit/src/nxt_router.c (revision 343)

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Valentin V. Bartenev
 * Copyright (C) NGINX, Inc.
 */

#include <nxt_router.h>
#include <nxt_conf.h>


typedef struct {
    nxt_str_t         type;
    uint32_t          workers;
    nxt_msec_t        timeout;
    uint32_t          requests;
    nxt_conf_value_t  *limits_value;
} nxt_router_app_conf_t;


typedef struct {
    nxt_str_t  application;
} nxt_router_listener_conf_t;


typedef struct nxt_req_app_link_s nxt_req_app_link_t;


typedef struct {
    uint32_t             stream;
    nxt_conn_t           *conn;
    nxt_app_t            *app;
    nxt_port_t           *app_port;
    nxt_req_app_link_t   *ra;

    nxt_queue_link_t     link;     /* for nxt_conn_t.requests */
} nxt_req_conn_link_t;


struct nxt_req_app_link_s {
    uint32_t             stream;
    nxt_port_t           *app_port;
    nxt_pid_t            app_pid;
    nxt_port_t           *reply_port;
    nxt_app_parse_ctx_t  *ap;
    nxt_req_conn_link_t  *rc;

    nxt_queue_link_t     link; /* for nxt_app_t.requests */

    nxt_mp_t             *mem_pool;
    nxt_work_t           work;
};


typedef struct {
    nxt_socket_conf_t       *socket_conf;
    nxt_router_temp_conf_t  *temp_conf;
} nxt_socket_rpc_t;


typedef struct {
    nxt_mp_t             *mem_pool;
    nxt_port_recv_msg_t  msg;
    nxt_work_t           work;
} nxt_remove_pid_msg_t;


static nxt_int_t nxt_router_start_worker(nxt_task_t *task, nxt_app_t *app);

static void nxt_router_worker_remove_pid_handler(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_worker_remove_pid_done(nxt_task_t *task, void *obj,
    void *data);

static nxt_router_temp_conf_t *nxt_router_temp_conf(nxt_task_t *task);
static void nxt_router_conf_apply(nxt_task_t *task, void *obj, void *data);
static void nxt_router_conf_ready(nxt_task_t *task,
    nxt_router_temp_conf_t *tmcf);
static void nxt_router_conf_error(nxt_task_t *task,
    nxt_router_temp_conf_t *tmcf);
static void nxt_router_conf_send(nxt_task_t *task,
    nxt_router_temp_conf_t *tmcf, nxt_port_msg_type_t type);
static void nxt_router_listen_sockets_sort(nxt_router_t *router,
    nxt_router_temp_conf_t *tmcf);

static nxt_int_t nxt_router_conf_create(nxt_task_t *task,
    nxt_router_temp_conf_t *tmcf, u_char *start, u_char *end);
static nxt_app_t *nxt_router_app_find(nxt_queue_t *queue, nxt_str_t *name);
static nxt_app_t *nxt_router_listener_application(nxt_router_temp_conf_t *tmcf,
    nxt_str_t *name);
static void nxt_router_listen_socket_rpc_create(nxt_task_t *task,
    nxt_router_temp_conf_t *tmcf, nxt_socket_conf_t *skcf);
static void nxt_router_listen_socket_ready(nxt_task_t *task,
    nxt_port_recv_msg_t *msg, void *data);
static void nxt_router_listen_socket_error(nxt_task_t *task,
    nxt_port_recv_msg_t *msg, void *data);
static nxt_socket_conf_t *nxt_router_socket_conf(nxt_task_t *task, nxt_mp_t *mp,
    nxt_sockaddr_t *sa);

static nxt_int_t nxt_router_engines_create(nxt_task_t *task,
    nxt_router_t *router, nxt_router_temp_conf_t *tmcf,
    const nxt_event_interface_t *interface);
static nxt_int_t nxt_router_engine_conf_create(nxt_router_temp_conf_t *tmcf,
    nxt_router_engine_conf_t *recf);
static nxt_int_t nxt_router_engine_conf_update(nxt_router_temp_conf_t *tmcf,
    nxt_router_engine_conf_t *recf);
static nxt_int_t nxt_router_engine_conf_delete(nxt_router_temp_conf_t *tmcf,
    nxt_router_engine_conf_t *recf);
static void nxt_router_engine_socket_count(nxt_queue_t *sockets);
static nxt_int_t nxt_router_engine_joints_create(nxt_router_temp_conf_t *tmcf,
    nxt_router_engine_conf_t *recf, nxt_queue_t *sockets,
    nxt_work_handler_t handler);
static nxt_int_t nxt_router_engine_quit(nxt_router_temp_conf_t *tmcf,
    nxt_router_engine_conf_t *recf);
static nxt_int_t nxt_router_engine_joints_delete(nxt_router_temp_conf_t *tmcf,
    nxt_router_engine_conf_t *recf, nxt_queue_t *sockets);

static nxt_int_t nxt_router_threads_create(nxt_task_t *task, nxt_runtime_t *rt,
    nxt_router_temp_conf_t *tmcf);
static nxt_int_t nxt_router_thread_create(nxt_task_t *task, nxt_runtime_t *rt,
    nxt_event_engine_t *engine);
static void nxt_router_apps_sort(nxt_task_t *task, nxt_router_t *router,
    nxt_router_temp_conf_t *tmcf);

static void nxt_router_engines_post(nxt_router_t *router,
    nxt_router_temp_conf_t *tmcf);
static void nxt_router_engine_post(nxt_event_engine_t *engine,
    nxt_work_t *jobs);

static void nxt_router_thread_start(void *data);
static void nxt_router_listen_socket_create(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_listen_socket_update(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_listen_socket_delete(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_worker_thread_quit(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_listen_socket_close(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_listen_socket_release(nxt_task_t *task,
    nxt_socket_conf_joint_t *joint);
static void nxt_router_thread_exit_handler(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_conf_release(nxt_task_t *task,
    nxt_socket_conf_joint_t *joint);

static void nxt_router_app_port_ready(nxt_task_t *task,
    nxt_port_recv_msg_t *msg, void *data);
static void nxt_router_app_port_error(nxt_task_t *task,
    nxt_port_recv_msg_t *msg, void *data);

static nxt_port_t * nxt_router_app_get_idle_port(nxt_app_t *app);
static void nxt_router_app_port_release(nxt_task_t *task, nxt_port_t *port,
    uint32_t request_failed, uint32_t got_response);

static void nxt_router_conn_init(nxt_task_t *task, void *obj, void *data);
static void nxt_router_conn_http_header_parse(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_conn_http_body_read(nxt_task_t *task, void *obj,
    void *data);
static void nxt_router_process_http_request(nxt_task_t *task,
    nxt_conn_t *c, nxt_app_parse_ctx_t *ap);
static void nxt_router_process_http_request_mp(nxt_task_t *task,
    nxt_req_app_link_t *ra);
static nxt_int_t nxt_python_prepare_msg(nxt_task_t *task, nxt_app_request_t *r,
    nxt_app_wmsg_t *wmsg);
static nxt_int_t nxt_php_prepare_msg(nxt_task_t *task, nxt_app_request_t *r,
    nxt_app_wmsg_t *wmsg);
static nxt_int_t nxt_go_prepare_msg(nxt_task_t *task, nxt_app_request_t *r,
    nxt_app_wmsg_t *wmsg);
static void nxt_router_conn_ready(nxt_task_t *task, void *obj, void *data);
static void nxt_router_conn_close(nxt_task_t *task, void *obj, void *data);
static void nxt_router_conn_free(nxt_task_t *task, void *obj, void *data);
static void nxt_router_conn_error(nxt_task_t *task, void *obj, void *data);
static void nxt_router_conn_timeout(nxt_task_t *task, void *obj, void *data);
static void nxt_router_app_timeout(nxt_task_t *task, void *obj, void *data);
static nxt_msec_t nxt_router_conn_timeout_value(nxt_conn_t *c, uintptr_t data);

static void nxt_router_gen_error(nxt_task_t *task, nxt_conn_t *c, int code,
    const char* fmt, ...);

static nxt_router_t  *nxt_router;


static nxt_app_prepare_msg_t  nxt_app_prepare_msg[] = {
    nxt_python_prepare_msg,
    nxt_php_prepare_msg,
    nxt_go_prepare_msg,
};


nxt_int_t
nxt_router_start(nxt_task_t *task, void *data)
{
    nxt_int_t      ret;
    nxt_router_t   *router;
    nxt_runtime_t  *rt;

    rt = task->thread->runtime;

    ret = nxt_app_http_init(task, rt);
    if (nxt_slow_path(ret != NXT_OK)) {
        return ret;
    }

    router = nxt_zalloc(sizeof(nxt_router_t));
    if (nxt_slow_path(router == NULL)) {
        return NXT_ERROR;
    }

    nxt_queue_init(&router->engines);
    nxt_queue_init(&router->sockets);
    nxt_queue_init(&router->apps);

    nxt_router = router;

    return NXT_OK;
}


static void
nxt_router_start_worker_handler(nxt_task_t *task, nxt_port_t *port, void *data)
{
    size_t         size;
    uint32_t       stream;
    nxt_app_t      *app;
    nxt_buf_t      *b;
    nxt_port_t     *main_port;
    nxt_runtime_t  *rt;

    app = data;

    rt = task->thread->runtime;
    main_port = rt->port_by_type[NXT_PROCESS_MAIN];

    nxt_debug(task, "app '%V' %p start worker", &app->name, app);

    size = app->name.length + 1 + app->conf.length;

    b = nxt_buf_mem_ts_alloc(task, task->thread->engine->mem_pool, size);

    if (nxt_slow_path(b == NULL)) {
        goto failed;
    }

    nxt_buf_cpystr(b, &app->name);
    *b->mem.free++ = '\0';
    nxt_buf_cpystr(b, &app->conf);

    stream = nxt_port_rpc_register_handler(task, port,
                                           nxt_router_app_port_ready,
                                           nxt_router_app_port_error,
                                           -1, app);

    if (nxt_slow_path(stream == 0)) {
        nxt_mp_release(b->data, b);

        goto failed;
    }

    nxt_port_socket_write(task, main_port, NXT_PORT_MSG_START_WORKER, -1,
                          stream, port->id, b);

    return;

failed:

    nxt_thread_mutex_lock(&app->mutex);

    app->pending_workers--;

    nxt_thread_mutex_unlock(&app->mutex);

    nxt_router_app_use(task, app, -1);
}


static nxt_int_t
nxt_router_start_worker(nxt_task_t *task, nxt_app_t *app)
{
    nxt_int_t      res;
    nxt_port_t     *router_port;
    nxt_runtime_t  *rt;

    rt = task->thread->runtime;
    router_port = rt->port_by_type[NXT_PROCESS_ROUTER];

    nxt_router_app_use(task, app, 1);

    res = nxt_port_post(task, router_port, nxt_router_start_worker_handler,
                        app);

    if (res == NXT_OK) {
        return res;
    }

    nxt_thread_mutex_lock(&app->mutex);

    app->pending_workers--;

    nxt_thread_mutex_unlock(&app->mutex);

    nxt_router_app_use(task, app, -1);

    return NXT_ERROR;
}


static nxt_req_app_link_t *
nxt_router_ra_create(nxt_task_t *task, nxt_req_conn_link_t *rc)
{
    nxt_mp_t            *mp;
    nxt_event_engine_t  *engine;
    nxt_req_app_link_t  *ra;

    mp = rc->conn->mem_pool;
    engine = task->thread->engine;

    ra = nxt_mp_retain(mp, sizeof(nxt_req_app_link_t));

    if (nxt_slow_path(ra == NULL)) {
        return NULL;
    }

    nxt_debug(task, "ra stream #%uD create", rc->stream);

    nxt_memzero(ra, sizeof(nxt_req_app_link_t));

    ra->stream = rc->stream;
    ra->app_pid = -1;
    ra->rc = rc;
    rc->ra = ra;
    ra->reply_port = engine->port;

    ra->mem_pool = mp;

    ra->work.handler = NULL;
    ra->work.task = &engine->task;
    ra->work.obj = ra;
    ra->work.data = engine;

    return ra;
}


static void
nxt_router_ra_release(nxt_task_t *task, void *obj, void *data)
{
    nxt_req_app_link_t   *ra;
    nxt_event_engine_t   *engine;
    nxt_req_conn_link_t  *rc;

    ra = obj;
    engine = data;

    if (task->thread->engine != engine) {
        if (ra->app_port != NULL) {
            ra->app_pid = ra->app_port->pid;
        }

        ra->work.handler = nxt_router_ra_release;
        ra->work.task = &engine->task;
        ra->work.next = NULL;

        nxt_debug(task, "ra stream #%uD post release to %p",
                  ra->stream, engine);

        nxt_event_engine_post(engine, &ra->work);

        return;
    }

    nxt_debug(task, "ra stream #%uD release", ra->stream);

    rc = ra->rc;

    if (rc != NULL) {
        if (ra->app_pid != -1) {
            nxt_port_rpc_ex_set_peer(task, engine->port, rc, ra->app_pid);
        }

        rc->app_port = ra->app_port;

        ra->app_port = NULL;
        rc->ra = NULL;
        ra->rc = NULL;
    }

    if (ra->app_port != NULL) {
        nxt_router_app_port_release(task, ra->app_port, 0, 1);

        ra->app_port = NULL;
    }

    nxt_mp_release(ra->mem_pool, ra);
}


static void
nxt_router_ra_abort(nxt_task_t *task, void *obj, void *data)
{
    nxt_conn_t           *c;
    nxt_req_app_link_t   *ra;
    nxt_req_conn_link_t  *rc;
    nxt_event_engine_t   *engine;

    ra = obj;
    engine = data;

    if (task->thread->engine != engine) {
        ra->work.handler = nxt_router_ra_abort;
        ra->work.task = &engine->task;
        ra->work.next = NULL;

        nxt_debug(task, "ra stream #%uD post abort to %p", ra->stream, engine);

        nxt_event_engine_post(engine, &ra->work);

        return;
    }

    nxt_debug(task, "ra stream #%uD abort", ra->stream);

    rc = ra->rc;

    if (rc != NULL) {
        c = rc->conn;

        nxt_router_gen_error(task, c, 500,
                             "Failed to start application worker");

        rc->ra = NULL;
        ra->rc = NULL;
    }

    if (ra->app_port != NULL) {
        nxt_router_app_port_release(task, ra->app_port, 0, 1);

        ra->app_port = NULL;
    }

    nxt_mp_release(ra->mem_pool, ra);
}


nxt_inline void
nxt_router_rc_unlink(nxt_task_t *task, nxt_req_conn_link_t *rc)
{
    nxt_req_app_link_t  *ra;

    if (rc->app_port != NULL) {
        nxt_router_app_port_release(task, rc->app_port, 0, 1);

        rc->app_port = NULL;
    }

    ra = rc->ra;

    if (ra != NULL) {
        rc->ra = NULL;
        ra->rc = NULL;

        nxt_thread_mutex_lock(&rc->app->mutex);

        if (ra->link.next != NULL) {
            nxt_queue_remove(&ra->link);

            ra->link.next = NULL;

        } else {
            ra = NULL;
        }

        nxt_thread_mutex_unlock(&rc->app->mutex);
    }

    if (ra != NULL) {
        nxt_router_ra_release(task, ra, ra->work.data);
    }

    if (rc->app != NULL) {
        nxt_router_app_use(task, rc->app, -1);

        rc->app = NULL;
    }

    nxt_queue_remove(&rc->link);

    rc->conn = NULL;
}


void
nxt_router_new_port_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
{
    nxt_port_new_port_handler(task, msg);

    if (msg->port_msg.stream == 0) {
        return;
    }

    if (msg->new_port == NULL || msg->new_port->type != NXT_PROCESS_WORKER) {
        msg->port_msg.type = _NXT_PORT_MSG_RPC_ERROR;
    }

    nxt_port_rpc_handler(task, msg);
}


void
nxt_router_conf_data_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
{
    size_t                  dump_size;
    nxt_int_t               ret;
    nxt_buf_t               *b;
    nxt_router_temp_conf_t  *tmcf;

    b = msg->buf;

    dump_size = nxt_buf_used_size(b);

    if (dump_size > 300) {
        dump_size = 300;
    }

    nxt_debug(task, "router conf data (%z): %*s",
              msg->size, dump_size, b->mem.pos);

    tmcf = nxt_router_temp_conf(task);
    if (nxt_slow_path(tmcf == NULL)) {
        return;
    }

    tmcf->conf->router = nxt_router;
    tmcf->stream = msg->port_msg.stream;
    tmcf->port = nxt_runtime_port_find(task->thread->runtime,
                                       msg->port_msg.pid,
                                       msg->port_msg.reply_port);

    ret = nxt_router_conf_create(task, tmcf, b->mem.pos, b->mem.free);

    if (nxt_fast_path(ret == NXT_OK)) {
        nxt_router_conf_apply(task, tmcf, NULL);

    } else {
        nxt_router_conf_error(task, tmcf);
    }
}


void
nxt_router_remove_pid_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
{
    nxt_mp_t              *mp;
    nxt_buf_t             *buf;
    nxt_event_engine_t    *engine;
    nxt_remove_pid_msg_t  *rp;

    nxt_port_remove_pid_handler(task, msg);

    if (msg->port_msg.stream == 0) {
        return;
    }

    mp = nxt_mp_create(1024, 128, 256, 32);

    buf = nxt_buf_mem_alloc(mp, nxt_buf_used_size(msg->buf), 0);
    buf->mem.free = nxt_cpymem(buf->mem.free, msg->buf->mem.pos,
                               nxt_buf_used_size(msg->buf));

    nxt_queue_each(engine, &nxt_router->engines, nxt_event_engine_t, link0)
    {
        rp = nxt_mp_retain(mp, sizeof(nxt_remove_pid_msg_t));

        rp->mem_pool = mp;

        rp->msg.fd = msg->fd;
        rp->msg.buf = buf;
        rp->msg.port = engine->port;
        rp->msg.port_msg = msg->port_msg;
        rp->msg.size = msg->size;
        rp->msg.new_port = NULL;

        rp->work.handler = nxt_router_worker_remove_pid_handler;
        rp->work.task = &engine->task;
        rp->work.obj = rp;
        rp->work.data = task->thread->engine;
        rp->work.next = NULL;

        nxt_event_engine_post(engine, &rp->work);
    }
    nxt_queue_loop;

    nxt_mp_release(mp, NULL);

    msg->port_msg.type = _NXT_PORT_MSG_RPC_ERROR;

    nxt_port_rpc_handler(task, msg);
}


static void
nxt_router_worker_remove_pid_handler(nxt_task_t *task, void *obj, void *data)
{
    nxt_pid_t             pid;
    nxt_buf_t             *buf;
    nxt_event_engine_t    *engine;
    nxt_remove_pid_msg_t  *rp;

    rp = obj;

    buf = rp->msg.buf;

    nxt_assert(nxt_buf_used_size(buf) == sizeof(pid));

    nxt_memcpy(&pid, buf->mem.pos, sizeof(pid));

    nxt_port_rpc_remove_peer(task, rp->msg.port, pid);

    engine = rp->work.data;

    rp->work.handler = nxt_router_worker_remove_pid_done;
    rp->work.task = &engine->task;
    rp->work.next = NULL;

    nxt_event_engine_post(engine, &rp->work);
}


static void
nxt_router_worker_remove_pid_done(nxt_task_t *task, void *obj, void *data)
{
    nxt_remove_pid_msg_t  *rp;

    rp = obj;

    nxt_mp_release(rp->mem_pool, rp);
}


static nxt_router_temp_conf_t *
nxt_router_temp_conf(nxt_task_t *task)
{
    nxt_mp_t                *mp, *tmp;
    nxt_router_conf_t       *rtcf;
    nxt_router_temp_conf_t  *tmcf;

    mp = nxt_mp_create(1024, 128, 256, 32);
    if (nxt_slow_path(mp == NULL)) {
        return NULL;
    }

    rtcf = nxt_mp_zget(mp, sizeof(nxt_router_conf_t));
    if (nxt_slow_path(rtcf == NULL)) {
        goto fail;
    }

    rtcf->mem_pool = mp;

    tmp = nxt_mp_create(1024, 128, 256, 32);
    if (nxt_slow_path(tmp == NULL)) {
        goto fail;
    }

    tmcf = nxt_mp_zget(tmp, sizeof(nxt_router_temp_conf_t));
    if (nxt_slow_path(tmcf == NULL)) {
        goto temp_fail;
    }

    tmcf->mem_pool = tmp;
    tmcf->conf = rtcf;
    tmcf->count = 1;
    tmcf->engine = task->thread->engine;

    tmcf->engines = nxt_array_create(tmcf->mem_pool, 4,
                                     sizeof(nxt_router_engine_conf_t));
    if (nxt_slow_path(tmcf->engines == NULL)) {
        goto temp_fail;
    }

    nxt_queue_init(&tmcf->deleting);
    nxt_queue_init(&tmcf->keeping);
    nxt_queue_init(&tmcf->updating);
    nxt_queue_init(&tmcf->pending);
    nxt_queue_init(&tmcf->creating);
    nxt_queue_init(&tmcf->apps);
    nxt_queue_init(&tmcf->previous);

    return tmcf;

temp_fail:

    nxt_mp_destroy(tmp);

fail:

    nxt_mp_destroy(mp);

    return NULL;
}


static void
nxt_router_conf_apply(nxt_task_t *task, void *obj, void *data)
{
    nxt_int_t                    ret;
    nxt_router_t                 *router;
    nxt_runtime_t                *rt;
    nxt_queue_link_t             *qlk;
    nxt_socket_conf_t            *skcf;
    nxt_router_temp_conf_t       *tmcf;
    const nxt_event_interface_t  *interface;

    tmcf = obj;

    qlk = nxt_queue_first(&tmcf->pending);

    if (qlk != nxt_queue_tail(&tmcf->pending)) {
        nxt_queue_remove(qlk);
        nxt_queue_insert_tail(&tmcf->creating, qlk);

        skcf = nxt_queue_link_data(qlk, nxt_socket_conf_t, link);

        nxt_router_listen_socket_rpc_create(task, tmcf, skcf);

        return;
    }

    rt = task->thread->runtime;

    interface = nxt_service_get(rt->services, "engine", NULL);

    router = tmcf->conf->router;

    ret = nxt_router_engines_create(task, router, tmcf, interface);
    if (nxt_slow_path(ret != NXT_OK)) {
        goto fail;
    }

    ret = nxt_router_threads_create(task, rt, tmcf);
    if (nxt_slow_path(ret != NXT_OK)) {
        goto fail;
    }

    nxt_router_apps_sort(task, router, tmcf);

    nxt_router_engines_post(router, tmcf);

    nxt_queue_add(&router->sockets, &tmcf->updating);
    nxt_queue_add(&router->sockets, &tmcf->creating);

    nxt_router_conf_ready(task, tmcf);

    return;

fail:

    nxt_router_conf_error(task, tmcf);

    return;
}


static void
nxt_router_conf_wait(nxt_task_t *task, void *obj, void *data)
{
    nxt_joint_job_t  *job;

    job = obj;

    nxt_router_conf_ready(task, job->tmcf);
}


static void
nxt_router_conf_ready(nxt_task_t *task, nxt_router_temp_conf_t *tmcf)
{
    nxt_debug(task, "temp conf count:%D", tmcf->count);

    if (--tmcf->count == 0) {
        nxt_router_conf_send(task, tmcf, NXT_PORT_MSG_RPC_READY_LAST);
    }
}


static void
nxt_router_conf_error(nxt_task_t *task, nxt_router_temp_conf_t *tmcf)
{
    nxt_socket_t       s;
    nxt_router_t       *router;
    nxt_queue_link_t   *qlk;
    nxt_socket_conf_t  *skcf;

    nxt_log(task, NXT_LOG_CRIT, "failed to apply new conf");

    for (qlk = nxt_queue_first(&tmcf->creating);
         qlk != nxt_queue_tail(&tmcf->creating);
         qlk = nxt_queue_next(qlk))
    {
        skcf = nxt_queue_link_data(qlk, nxt_socket_conf_t, link);
        s = skcf->listen.socket;

        if (s != -1) {
            nxt_socket_close(task, s);
        }

        nxt_free(skcf->socket);
    }

    router = tmcf->conf->router;

    nxt_queue_add(&router->sockets, &tmcf->keeping);
    nxt_queue_add(&router->sockets, &tmcf->deleting);

    // TODO: new engines and threads

    nxt_mp_destroy(tmcf->conf->mem_pool);

    nxt_router_conf_send(task, tmcf, NXT_PORT_MSG_RPC_ERROR);
}


static void
nxt_router_conf_send(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
    nxt_port_msg_type_t type)
{
    nxt_port_socket_write(task, tmcf->port, type, -1, tmcf->stream, 0, NULL);
}


static nxt_conf_map_t  nxt_router_conf[] = {
    {
        nxt_string("listeners_threads"),
        NXT_CONF_MAP_INT32,
        offsetof(nxt_router_conf_t, threads),
    },
};


static nxt_conf_map_t  nxt_router_app_conf[] = {
    {
        nxt_string("type"),
        NXT_CONF_MAP_STR,
        offsetof(nxt_router_app_conf_t, type),
    },

    {
        nxt_string("workers"),
        NXT_CONF_MAP_INT32,
        offsetof(nxt_router_app_conf_t, workers),
    },

    {
        nxt_string("limits"),
        NXT_CONF_MAP_PTR,
        offsetof(nxt_router_app_conf_t, limits_value),
    },
};


static nxt_conf_map_t  nxt_router_app_limits_conf[] = {
    {
        nxt_string("timeout"),
        NXT_CONF_MAP_MSEC,
        offsetof(nxt_router_app_conf_t, timeout),
    },

    {
        nxt_string("requests"),
        NXT_CONF_MAP_INT32,
        offsetof(nxt_router_app_conf_t, requests),
    },
};