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/*
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 "xreq.h"
#include "../../nn.h"
#include "../../reqrep.h"
#include "../../utils/err.h"
#include "../../utils/cont.h"
#include "../../utils/fast.h"
#include "../../utils/alloc.h"
#include "../../utils/list.h"
#include "../../utils/attr.h"
struct nn_xreq_data {
struct nn_lb_data lb;
struct nn_fq_data fq;
};
/* Private functions. */
static void nn_xreq_destroy (struct nn_sockbase *self);
static const struct nn_sockbase_vfptr nn_xreq_sockbase_vfptr = {
NULL,
nn_xreq_destroy,
nn_xreq_add,
nn_xreq_rm,
nn_xreq_in,
nn_xreq_out,
nn_xreq_events,
nn_xreq_send,
nn_xreq_recv,
nn_xreq_setopt,
nn_xreq_getopt
};
void nn_xreq_init(struct nn_xreq *self,const struct nn_sockbase_vfptr *vfptr,void *hint)
{
nn_sockbase_init(&self->sockbase,vfptr,hint);
nn_lb_init(&self->lb);
nn_fq_init(&self->fq);
}
void nn_xreq_term (struct nn_xreq *self)
{
nn_fq_term (&self->fq);
nn_lb_term (&self->lb);
nn_sockbase_term (&self->sockbase);
}
static void nn_xreq_destroy (struct nn_sockbase *self)
{
struct nn_xreq *xreq;
xreq = nn_cont (self, struct nn_xreq, sockbase);
nn_xreq_term (xreq);
nn_free (xreq);
}
int nn_xreq_add(struct nn_sockbase *self, struct nn_pipe *pipe)
{
struct nn_xreq *xreq;
struct nn_xreq_data *data;
int sndprio;
int rcvprio;
size_t sz;
xreq = nn_cont (self, struct nn_xreq, sockbase);
sz = sizeof (sndprio);
nn_pipe_getopt (pipe, NN_SOL_SOCKET, NN_SNDPRIO, &sndprio, &sz);
nn_assert (sz == sizeof (sndprio));
nn_assert (sndprio >= 1 && sndprio <= 16);
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_xreq_data),"pipe data (req)");
alloc_assert(data);
nn_pipe_setdata(pipe,data);
nn_lb_add(&xreq->lb,&data->lb,pipe,sndprio);
nn_fq_add(&xreq->fq,&data->fq,pipe,rcvprio);
return 0;
}
void nn_xreq_rm (struct nn_sockbase *self, struct nn_pipe *pipe)
{
struct nn_xreq *xreq;
struct nn_xreq_data *data;
xreq = nn_cont (self, struct nn_xreq, sockbase);
data = nn_pipe_getdata (pipe);
nn_lb_rm (&xreq->lb, &data->lb);
nn_fq_rm (&xreq->fq, &data->fq);
nn_free (data);
nn_sockbase_stat_increment (self, NN_STAT_CURRENT_SND_PRIORITY,
nn_lb_get_priority (&xreq->lb));
}
void nn_xreq_in (struct nn_sockbase *self, struct nn_pipe *pipe)
{
struct nn_xreq *xreq;
struct nn_xreq_data *data;
xreq = nn_cont (self, struct nn_xreq, sockbase);
data = nn_pipe_getdata (pipe);
nn_fq_in (&xreq->fq, &data->fq);
}
void nn_xreq_out (struct nn_sockbase *self, struct nn_pipe *pipe)
{
struct nn_xreq *xreq;
struct nn_xreq_data *data;
xreq = nn_cont (self, struct nn_xreq, sockbase);
data = nn_pipe_getdata (pipe);
nn_lb_out (&xreq->lb, &data->lb);
nn_sockbase_stat_increment (self, NN_STAT_CURRENT_SND_PRIORITY,
nn_lb_get_priority (&xreq->lb));
}
int nn_xreq_events (struct nn_sockbase *self)
{
struct nn_xreq *xreq;
xreq = nn_cont (self, struct nn_xreq, sockbase);
return (nn_fq_can_recv (&xreq->fq) ? NN_SOCKBASE_EVENT_IN : 0) |
(nn_lb_can_send (&xreq->lb) ? NN_SOCKBASE_EVENT_OUT : 0);
}
int nn_xreq_send (struct nn_sockbase *self, struct nn_msg *msg)
{
return nn_xreq_send_to (self, msg, NULL);
}
int nn_xreq_send_to (struct nn_sockbase *self, struct nn_msg *msg,
struct nn_pipe **to)
{
int rc;
/* If request cannot be sent due to the pushback, drop it silenly. */
rc = nn_lb_send (&nn_cont (self, struct nn_xreq, sockbase)->lb, msg, to);
if (nn_slow (rc == -EAGAIN))
return -EAGAIN;
errnum_assert (rc >= 0, -rc);
return 0;
}
int nn_xreq_recv (struct nn_sockbase *self, struct nn_msg *msg)
{
int rc;
rc = nn_fq_recv (&nn_cont (self, struct nn_xreq, sockbase)->fq, msg, NULL);
if (rc == -EAGAIN)
return -EAGAIN;
errnum_assert (rc >= 0, -rc);
if (!(rc & NN_PIPE_PARSED)) {
/* Ignore malformed replies. */
if (nn_slow (nn_chunkref_size (&msg->body) < sizeof (uint32_t))) {
nn_msg_term (msg);
return -EAGAIN;
}
/* Split the message into the header and the body. */
nn_assert (nn_chunkref_size (&msg->sphdr) == 0);
nn_chunkref_term (&msg->sphdr);
nn_chunkref_init (&msg->sphdr, sizeof (uint32_t));
memcpy (nn_chunkref_data (&msg->sphdr), nn_chunkref_data (&msg->body),
sizeof (uint32_t));
nn_chunkref_trim (&msg->body, sizeof (uint32_t));
}
return 0;
}
int nn_xreq_setopt (NN_UNUSED struct nn_sockbase *self,
NN_UNUSED int level, NN_UNUSED int option,
NN_UNUSED const void *optval, NN_UNUSED size_t optvallen)
{
return -ENOPROTOOPT;
}
int nn_xreq_getopt (NN_UNUSED struct nn_sockbase *self,
NN_UNUSED int level, NN_UNUSED int option,
NN_UNUSED void *optval, NN_UNUSED size_t *optvallen)
{
return -ENOPROTOOPT;
}
static int nn_xreq_create (void *hint, struct nn_sockbase **sockbase)
{
struct nn_xreq *self;
self = nn_alloc (sizeof (struct nn_xreq), "socket (xreq)");
alloc_assert (self);
nn_xreq_init (self, &nn_xreq_sockbase_vfptr, hint);
*sockbase = &self->sockbase;
return 0;
}
int nn_xreq_ispeer (int socktype)
{
return socktype == NN_REP ? 1 : 0;
}
static struct nn_socktype nn_xreq_socktype_struct = {
AF_SP_RAW,
NN_REQ,
0,
nn_xreq_create,
nn_xreq_ispeer,
NN_LIST_ITEM_INITIALIZER
};
struct nn_socktype *nn_xreq_socktype = &nn_xreq_socktype_struct;