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231 lines
7.9 KiB
231 lines
7.9 KiB
/*
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Copyright (c) 2012-2014 Martin Sustrik All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom
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the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#include "atcpmux.h"
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#include "../../utils/err.h"
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#include "../../utils/cont.h"
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#include "../../utils/attr.h"
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#define NN_ATCPMUX_STATE_IDLE 1
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#define NN_ATCPMUX_STATE_ACTIVE 2
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#define NN_ATCPMUX_STATE_STOPPING_STCPMUX 3
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#define NN_ATCPMUX_STATE_STOPPING_USOCK 4
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#define NN_ATCPMUX_STATE_DONE 5
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#define NN_ATCPMUX_STATE_STOPPING_STCPMUX_FINAL 6
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#define NN_ATCPMUX_STATE_STOPPING 7
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#define NN_ATCPMUX_SRC_USOCK 1
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#define NN_ATCPMUX_SRC_STCPMUX 2
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/* Private functions. */
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static void nn_atcpmux_handler (struct nn_fsm *self, int src, int type,
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void *srcptr);
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static void nn_atcpmux_shutdown (struct nn_fsm *self, int src, int type,
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void *srcptr);
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void nn_atcpmux_init (struct nn_atcpmux *self, int src,
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struct nn_epbase *epbase, struct nn_fsm *owner)
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{
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nn_fsm_init (&self->fsm, nn_atcpmux_handler, nn_atcpmux_shutdown,
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src, self, owner);
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self->state = NN_ATCPMUX_STATE_IDLE;
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self->epbase = epbase;
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nn_usock_init (&self->usock, NN_ATCPMUX_SRC_USOCK, &self->fsm);
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nn_stcpmux_init (&self->stcpmux, NN_ATCPMUX_SRC_STCPMUX,
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epbase, &self->fsm);
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nn_fsm_event_init (&self->accepted);
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nn_fsm_event_init (&self->done);
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nn_list_item_init (&self->item);
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}
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void nn_atcpmux_term (struct nn_atcpmux *self)
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{
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nn_assert_state (self, NN_ATCPMUX_STATE_IDLE);
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nn_list_item_term (&self->item);
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nn_fsm_event_term (&self->done);
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nn_fsm_event_term (&self->accepted);
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nn_stcpmux_term (&self->stcpmux);
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nn_usock_term (&self->usock);
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nn_fsm_term (&self->fsm);
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}
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int nn_atcpmux_isidle (struct nn_atcpmux *self)
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{
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return nn_fsm_isidle (&self->fsm);
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}
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void nn_atcpmux_start (struct nn_atcpmux *self, int fd)
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{
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nn_assert_state (self, NN_ATCPMUX_STATE_IDLE);
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/* Start the state machine. */
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nn_fsm_start (&self->fsm);
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/* Start the stcp state machine. */
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nn_usock_start_fd (&self->usock, fd);
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nn_stcpmux_start (&self->stcpmux, &self->usock);
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self->state = NN_ATCPMUX_STATE_ACTIVE;
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}
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void nn_atcpmux_stop (struct nn_atcpmux *self)
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{
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nn_fsm_stop (&self->fsm);
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}
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static void nn_atcpmux_shutdown (struct nn_fsm *self, int src, int type,
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NN_UNUSED void *srcptr)
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{
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struct nn_atcpmux *atcpmux;
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atcpmux = nn_cont (self, struct nn_atcpmux, fsm);
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if (nn_slow (src == NN_FSM_ACTION && type == NN_FSM_STOP)) {
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if (!nn_stcpmux_isidle (&atcpmux->stcpmux)) {
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nn_epbase_stat_increment (atcpmux->epbase,
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NN_STAT_DROPPED_CONNECTIONS, 1);
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nn_stcpmux_stop (&atcpmux->stcpmux);
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}
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atcpmux->state = NN_ATCPMUX_STATE_STOPPING_STCPMUX_FINAL;
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}
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if (nn_slow (atcpmux->state == NN_ATCPMUX_STATE_STOPPING_STCPMUX_FINAL)) {
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if (!nn_stcpmux_isidle (&atcpmux->stcpmux))
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return;
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nn_usock_stop (&atcpmux->usock);
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atcpmux->state = NN_ATCPMUX_STATE_STOPPING;
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}
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if (nn_slow (atcpmux->state == NN_ATCPMUX_STATE_STOPPING)) {
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if (!nn_usock_isidle (&atcpmux->usock))
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return;
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atcpmux->state = NN_ATCPMUX_STATE_IDLE;
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nn_fsm_stopped (&atcpmux->fsm, NN_ATCPMUX_STOPPED);
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return;
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}
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nn_fsm_bad_action(atcpmux->state, src, type);
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}
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static void nn_atcpmux_handler (struct nn_fsm *self, int src, int type,
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NN_UNUSED void *srcptr)
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{
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struct nn_atcpmux *atcpmux;
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atcpmux = nn_cont (self, struct nn_atcpmux, fsm);
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switch (atcpmux->state) {
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/******************************************************************************/
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/* IDLE state. */
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/* The state machine wasn't yet started. */
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/******************************************************************************/
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case NN_ATCPMUX_STATE_IDLE:
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switch (src) {
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case NN_FSM_ACTION:
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switch (type) {
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case NN_FSM_START:
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// TODO
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atcpmux->state = NN_ATCPMUX_STATE_ACTIVE;
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return;
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default:
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nn_fsm_bad_action (atcpmux->state, src, type);
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}
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default:
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nn_fsm_bad_source (atcpmux->state, src, type);
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}
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/******************************************************************************/
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/* ACTIVE state. */
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/******************************************************************************/
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case NN_ATCPMUX_STATE_ACTIVE:
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switch (src) {
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case NN_ATCPMUX_SRC_STCPMUX:
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switch (type) {
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case NN_STCPMUX_ERROR:
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nn_stcpmux_stop (&atcpmux->stcpmux);
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atcpmux->state = NN_ATCPMUX_STATE_STOPPING_STCPMUX;
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nn_epbase_stat_increment (atcpmux->epbase,
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NN_STAT_BROKEN_CONNECTIONS, 1);
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return;
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default:
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nn_fsm_bad_action (atcpmux->state, src, type);
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}
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default:
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nn_fsm_bad_source (atcpmux->state, src, type);
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}
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/******************************************************************************/
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/* STOPPING_STCPMUX state. */
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/******************************************************************************/
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case NN_ATCPMUX_STATE_STOPPING_STCPMUX:
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switch (src) {
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case NN_ATCPMUX_SRC_STCPMUX:
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switch (type) {
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case NN_USOCK_SHUTDOWN:
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return;
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case NN_STCPMUX_STOPPED:
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nn_usock_stop (&atcpmux->usock);
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atcpmux->state = NN_ATCPMUX_STATE_STOPPING_USOCK;
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return;
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default:
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nn_fsm_bad_action (atcpmux->state, src, type);
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}
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default:
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nn_fsm_bad_source (atcpmux->state, src, type);
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}
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/******************************************************************************/
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/* STOPPING_USOCK state. */
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/******************************************************************************/
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case NN_ATCPMUX_STATE_STOPPING_USOCK:
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switch (src) {
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case NN_ATCPMUX_SRC_USOCK:
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switch (type) {
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case NN_USOCK_SHUTDOWN:
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return;
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case NN_USOCK_STOPPED:
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nn_fsm_raise (&atcpmux->fsm, &atcpmux->done, NN_ATCPMUX_ERROR);
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atcpmux->state = NN_ATCPMUX_STATE_DONE;
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return;
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default:
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nn_fsm_bad_action (atcpmux->state, src, type);
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}
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default:
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nn_fsm_bad_source (atcpmux->state, src, type);
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}
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/******************************************************************************/
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/* Invalid state. */
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/******************************************************************************/
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default:
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nn_fsm_bad_state (atcpmux->state, src, type);
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}
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}
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