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