| /* |
| Copyright (c) 2012-2013 Martin Sustrik All rights reserved. |
| Copyright (c) 2013 GoPivotal, Inc. All rights reserved. |
| Copyright 2016 Garrett D'Amore <garrett@damore.org> |
| |
| 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 "cinproc.h" |
| #include "binproc.h" |
| #include "ins.h" |
| |
| #include "../../utils/err.h" |
| #include "../../utils/cont.h" |
| #include "../../utils/alloc.h" |
| #include "../../utils/attr.h" |
| |
| #include <stddef.h> |
| |
| #define NN_CINPROC_STATE_IDLE 1 |
| #define NN_CINPROC_STATE_ACTIVE 2 |
| #define NN_CINPROC_STATE_STOPPING 3 |
| |
| #define NN_CINPROC_ACTION_CONNECT 1 |
| |
| #define NN_CINPROC_SRC_SINPROC 1 |
| |
| /* Implementation of nn_ep callback interface. */ |
| static void nn_cinproc_stop (void *); |
| static void nn_cinproc_destroy (void *); |
| static const struct nn_ep_ops nn_cinproc_ops = { |
| nn_cinproc_stop, |
| nn_cinproc_destroy |
| }; |
| |
| /* Private functions. */ |
| static void nn_cinproc_handler (struct nn_fsm *self, int src, int type, |
| void *srcptr); |
| static void nn_cinproc_shutdown (struct nn_fsm *self, int src, int type, |
| void *srcptr); |
| static void nn_cinproc_connect (struct nn_ins_item *self, |
| struct nn_ins_item *peer); |
| |
| int nn_cinproc_create (struct nn_ep *ep) |
| { |
| struct nn_cinproc *self; |
| |
| self = nn_alloc (sizeof (struct nn_cinproc), "cinproc"); |
| alloc_assert (self); |
| |
| nn_ep_tran_setup (ep, &nn_cinproc_ops, self); |
| |
| nn_ins_item_init (&self->item, ep); |
| nn_fsm_init_root (&self->fsm, nn_cinproc_handler, nn_cinproc_shutdown, |
| nn_ep_getctx (ep)); |
| self->state = NN_CINPROC_STATE_IDLE; |
| nn_list_init (&self->sinprocs); |
| |
| nn_ep_stat_increment (ep, NN_STAT_INPROGRESS_CONNECTIONS, 1); |
| |
| /* Start the state machine. */ |
| nn_fsm_start (&self->fsm); |
| |
| /* Register the inproc endpoint into a global repository. */ |
| nn_ins_connect (&self->item, nn_cinproc_connect); |
| |
| return 0; |
| } |
| |
| static void nn_cinproc_stop (void *self) |
| { |
| struct nn_cinproc *cinproc = self; |
| |
| nn_fsm_stop (&cinproc->fsm); |
| } |
| |
| static void nn_cinproc_destroy (void *self) |
| { |
| struct nn_cinproc *cinproc = self; |
| |
| nn_list_term (&cinproc->sinprocs); |
| nn_fsm_term (&cinproc->fsm); |
| nn_ins_item_term (&cinproc->item); |
| |
| nn_free (cinproc); |
| } |
| |
| static void nn_cinproc_connect (struct nn_ins_item *self, |
| struct nn_ins_item *peer) |
| { |
| struct nn_cinproc *cinproc; |
| struct nn_binproc *binproc; |
| struct nn_sinproc *sinproc; |
| |
| cinproc = nn_cont (self, struct nn_cinproc, item); |
| binproc = nn_cont (peer, struct nn_binproc, item); |
| |
| nn_assert_state (cinproc, NN_CINPROC_STATE_ACTIVE); |
| |
| sinproc = nn_alloc (sizeof (struct nn_sinproc), "sinproc"); |
| alloc_assert (sinproc); |
| nn_sinproc_init (sinproc, NN_CINPROC_SRC_SINPROC, |
| cinproc->item.ep, &cinproc->fsm); |
| |
| nn_list_insert (&cinproc->sinprocs, &sinproc->item, |
| nn_list_end (&cinproc->sinprocs)); |
| |
| nn_sinproc_connect (sinproc, &binproc->fsm); |
| |
| nn_ep_stat_increment (cinproc->item.ep, NN_STAT_INPROGRESS_CONNECTIONS, -1); |
| nn_ep_stat_increment (cinproc->item.ep, NN_STAT_ESTABLISHED_CONNECTIONS, 1); |
| } |
| |
| static void nn_cinproc_shutdown (struct nn_fsm *self, int src, int type, |
| NN_UNUSED void *srcptr) |
| { |
| struct nn_cinproc *cinproc; |
| struct nn_sinproc *sinproc; |
| struct nn_list_item *it; |
| |
| cinproc = nn_cont (self, struct nn_cinproc, fsm); |
| |
| if (src == NN_FSM_ACTION && type == NN_FSM_STOP) { |
| |
| /* First, unregister the endpoint from the global repository of inproc |
| endpoints. This way, new connections cannot be created anymore. */ |
| nn_ins_disconnect (&cinproc->item); |
| |
| /* Stop the existing connection. */ |
| for (it = nn_list_begin (&cinproc->sinprocs); |
| it != nn_list_end (&cinproc->sinprocs); |
| it = nn_list_next (&cinproc->sinprocs, it)) { |
| sinproc = nn_cont (it, struct nn_sinproc, item); |
| nn_sinproc_stop (sinproc); |
| } |
| cinproc->state = NN_CINPROC_STATE_STOPPING; |
| goto finish; |
| } |
| if (cinproc->state == NN_CINPROC_STATE_STOPPING) { |
| sinproc = (struct nn_sinproc *) srcptr; |
| nn_list_erase (&cinproc->sinprocs, &sinproc->item); |
| nn_sinproc_term (sinproc); |
| nn_free (sinproc); |
| |
| finish: |
| if (!nn_list_empty (&cinproc->sinprocs)) |
| return; |
| cinproc->state = NN_CINPROC_STATE_IDLE; |
| nn_fsm_stopped_noevent (&cinproc->fsm); |
| nn_ep_stopped (cinproc->item.ep); |
| return; |
| } |
| |
| nn_fsm_bad_state(cinproc->state, src, type); |
| } |
| |
| static void nn_cinproc_handler (struct nn_fsm *self, int src, int type, |
| void *srcptr) |
| { |
| struct nn_cinproc *cinproc; |
| struct nn_sinproc *sinproc; |
| struct nn_sinproc *peer; |
| |
| cinproc = nn_cont (self, struct nn_cinproc, fsm); |
| |
| |
| switch (cinproc->state) { |
| |
| /******************************************************************************/ |
| /* IDLE state. */ |
| /******************************************************************************/ |
| case NN_CINPROC_STATE_IDLE: |
| switch (src) { |
| |
| case NN_FSM_ACTION: |
| switch (type) { |
| case NN_FSM_START: |
| cinproc->state = NN_CINPROC_STATE_ACTIVE; |
| return; |
| default: |
| nn_fsm_bad_action (cinproc->state, src, type); |
| } |
| |
| default: |
| nn_fsm_bad_source (cinproc->state, src, type); |
| } |
| |
| /******************************************************************************/ |
| /* ACTIVE state. */ |
| /******************************************************************************/ |
| case NN_CINPROC_STATE_ACTIVE: |
| switch (src) { |
| case NN_SINPROC_SRC_PEER: |
| peer = (struct nn_sinproc*) srcptr; |
| |
| switch (type) { |
| case NN_SINPROC_CONNECT: |
| sinproc = nn_alloc (sizeof (struct nn_sinproc), "sinproc"); |
| alloc_assert (sinproc); |
| nn_sinproc_init (sinproc, NN_CINPROC_SRC_SINPROC, |
| cinproc->item.ep, &cinproc->fsm); |
| nn_list_insert (&cinproc->sinprocs, &sinproc->item, |
| nn_list_end (&cinproc->sinprocs)); |
| nn_sinproc_accept (sinproc, peer); |
| nn_ep_stat_increment (cinproc->item.ep, |
| NN_STAT_INPROGRESS_CONNECTIONS, -1); |
| nn_ep_stat_increment (cinproc->item.ep, |
| NN_STAT_ESTABLISHED_CONNECTIONS, 1); |
| return; |
| default: |
| nn_fsm_bad_action (cinproc->state, src, type); |
| } |
| |
| case NN_CINPROC_SRC_SINPROC: |
| switch (type) { |
| case NN_SINPROC_DISCONNECT: |
| nn_ep_stat_increment (cinproc->item.ep, |
| NN_STAT_INPROGRESS_CONNECTIONS, 1); |
| return; |
| } |
| return; |
| |
| default: |
| nn_fsm_bad_source (cinproc->state, src, type); |
| } |
| |
| /******************************************************************************/ |
| /* Invalid state. */ |
| /******************************************************************************/ |
| default: |
| nn_fsm_bad_state (cinproc->state, src, type); |
| } |
| } |