| /* |
| Copyright (c) 2012-2014 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 "xsub.h" |
| #include "trie.h" |
| |
| #include "../../nn.h" |
| #include "../../pubsub.h" |
| |
| #include "../utils/fq.h" |
| |
| #include "../../utils/err.h" |
| #include "../../utils/cont.h" |
| #include "../../utils/fast.h" |
| #include "../../utils/alloc.h" |
| #include "../../utils/attr.h" |
| |
| struct nn_xsub_data { |
| struct nn_fq_data fq; |
| }; |
| |
| struct nn_xsub { |
| struct nn_sockbase sockbase; |
| struct nn_fq fq; |
| struct nn_trie trie; |
| }; |
| |
| /* Private functions. */ |
| static void nn_xsub_init (struct nn_xsub *self, |
| const struct nn_sockbase_vfptr *vfptr, void *hint); |
| static void nn_xsub_term (struct nn_xsub *self); |
| |
| /* Implementation of nn_sockbase's virtual functions. */ |
| static void nn_xsub_destroy (struct nn_sockbase *self); |
| static int nn_xsub_add (struct nn_sockbase *self, struct nn_pipe *pipe); |
| static void nn_xsub_rm (struct nn_sockbase *self, struct nn_pipe *pipe); |
| static void nn_xsub_in (struct nn_sockbase *self, struct nn_pipe *pipe); |
| static void nn_xsub_out (struct nn_sockbase *self, struct nn_pipe *pipe); |
| static int nn_xsub_events (struct nn_sockbase *self); |
| static int nn_xsub_recv (struct nn_sockbase *self, struct nn_msg *msg); |
| static int nn_xsub_setopt (struct nn_sockbase *self, int level, int option, |
| const void *optval, size_t optvallen); |
| static const struct nn_sockbase_vfptr nn_xsub_sockbase_vfptr = { |
| NULL, |
| nn_xsub_destroy, |
| nn_xsub_add, |
| nn_xsub_rm, |
| nn_xsub_in, |
| nn_xsub_out, |
| nn_xsub_events, |
| NULL, |
| nn_xsub_recv, |
| nn_xsub_setopt, |
| NULL |
| }; |
| |
| static void nn_xsub_init (struct nn_xsub *self, |
| const struct nn_sockbase_vfptr *vfptr, void *hint) |
| { |
| nn_sockbase_init (&self->sockbase, vfptr, hint); |
| nn_fq_init (&self->fq); |
| nn_trie_init (&self->trie); |
| } |
| |
| static void nn_xsub_term (struct nn_xsub *self) |
| { |
| nn_trie_term (&self->trie); |
| nn_fq_term (&self->fq); |
| nn_sockbase_term (&self->sockbase); |
| } |
| |
| void nn_xsub_destroy (struct nn_sockbase *self) |
| { |
| struct nn_xsub *xsub; |
| |
| xsub = nn_cont (self, struct nn_xsub, sockbase); |
| |
| nn_xsub_term (xsub); |
| nn_free (xsub); |
| } |
| |
| static int nn_xsub_add (struct nn_sockbase *self, struct nn_pipe *pipe) |
| { |
| struct nn_xsub *xsub; |
| struct nn_xsub_data *data; |
| int rcvprio; |
| size_t sz; |
| |
| xsub = nn_cont (self, struct nn_xsub, sockbase); |
| |
| sz = sizeof (rcvprio); |
| nn_pipe_getopt (pipe, NN_SOL_SOCKET, NN_RCVPRIO, &rcvprio, &sz); |
| nn_assert (sz == sizeof (rcvprio)); |
| nn_assert (rcvprio >= 1 && rcvprio <= 16); |
| |
| data = nn_alloc (sizeof (struct nn_xsub_data), "pipe data (sub)"); |
| alloc_assert (data); |
| nn_pipe_setdata (pipe, data); |
| nn_fq_add (&xsub->fq, &data->fq, pipe, rcvprio); |
| |
| return 0; |
| } |
| |
| static void nn_xsub_rm (struct nn_sockbase *self, struct nn_pipe *pipe) |
| { |
| struct nn_xsub *xsub; |
| struct nn_xsub_data *data; |
| |
| xsub = nn_cont (self, struct nn_xsub, sockbase); |
| data = nn_pipe_getdata (pipe); |
| nn_fq_rm (&xsub->fq, &data->fq); |
| nn_free (data); |
| } |
| |
| static void nn_xsub_in (struct nn_sockbase *self, struct nn_pipe *pipe) |
| { |
| struct nn_xsub *xsub; |
| struct nn_xsub_data *data; |
| |
| xsub = nn_cont (self, struct nn_xsub, sockbase); |
| data = nn_pipe_getdata (pipe); |
| nn_fq_in (&xsub->fq, &data->fq); |
| } |
| |
| static void nn_xsub_out (NN_UNUSED struct nn_sockbase *self, |
| NN_UNUSED struct nn_pipe *pipe) |
| { |
| /* We are not going to send any messages until subscription forwarding |
| is implemented, so there's no point is maintaining a list of pipes |
| ready for sending. */ |
| } |
| |
| static int nn_xsub_events (struct nn_sockbase *self) |
| { |
| return nn_fq_can_recv (&nn_cont (self, struct nn_xsub, sockbase)->fq) ? |
| NN_SOCKBASE_EVENT_IN : 0; |
| } |
| |
| static int nn_xsub_recv (struct nn_sockbase *self, struct nn_msg *msg) |
| { |
| int rc; |
| struct nn_xsub *xsub; |
| |
| xsub = nn_cont (self, struct nn_xsub, sockbase); |
| |
| /* Loop while a matching message is found or when there are no more |
| messages to receive. */ |
| while (1) { |
| rc = nn_fq_recv (&xsub->fq, msg, NULL); |
| if (nn_slow (rc == -EAGAIN)) |
| return -EAGAIN; |
| errnum_assert (rc >= 0, -rc); |
| rc = nn_trie_match (&xsub->trie, nn_chunkref_data (&msg->body), |
| nn_chunkref_size (&msg->body)); |
| if (rc == 0) { |
| nn_msg_term (msg); |
| continue; |
| } |
| if (rc == 1) |
| return 0; |
| errnum_assert (0, -rc); |
| } |
| } |
| |
| static int nn_xsub_setopt (struct nn_sockbase *self, int level, int option, |
| const void *optval, size_t optvallen) |
| { |
| int rc; |
| struct nn_xsub *xsub; |
| |
| xsub = nn_cont (self, struct nn_xsub, sockbase); |
| |
| if (level != NN_SUB) |
| return -ENOPROTOOPT; |
| |
| if (option == NN_SUB_SUBSCRIBE) { |
| rc = nn_trie_subscribe (&xsub->trie, optval, optvallen); |
| if (rc >= 0) |
| return 0; |
| return rc; |
| } |
| |
| if (option == NN_SUB_UNSUBSCRIBE) { |
| rc = nn_trie_unsubscribe (&xsub->trie, optval, optvallen); |
| if (rc >= 0) |
| return 0; |
| return rc; |
| } |
| |
| return -ENOPROTOOPT; |
| } |
| |
| int nn_xsub_create (void *hint, struct nn_sockbase **sockbase) |
| { |
| struct nn_xsub *self; |
| |
| self = nn_alloc (sizeof (struct nn_xsub), "socket (xsub)"); |
| alloc_assert (self); |
| nn_xsub_init (self, &nn_xsub_sockbase_vfptr, hint); |
| *sockbase = &self->sockbase; |
| |
| return 0; |
| } |
| |
| int nn_xsub_ispeer (int socktype) |
| { |
| return socktype == NN_PUB ? 1 : 0; |
| } |
| |
| struct nn_socktype nn_xsub_socktype = { |
| AF_SP_RAW, |
| NN_SUB, |
| NN_SOCKTYPE_FLAG_NOSEND, |
| nn_xsub_create, |
| nn_xsub_ispeer, |
| }; |