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/*
* Copyright 2016 Garrett D'Amore <garrett@damore.org>
*
* This software is supplied under the terms of the MIT License, a
* copy of which should be located in the distribution where this
* file was obtained (LICENSE.txt). A copy of the license may also be
* found online at https://opensource.org/licenses/MIT.
*/
#include "core/nng_impl.h"
/*
* Socket implementation.
*/
/*
* nni_socket_sendq and nni_socket_recvq are called by the protocol to obtain
* the upper read and write queues.
*/
nni_msgqueue_t
nni_socket_sendq(nni_socket_t s)
{
return (s->s_uwq);
}
nni_msgqueue_t
nni_socket_recvq(nni_socket_t s)
{
return (s->s_urq);
}
int
nni_socket_create(nni_socket_t *sockp, uint16_t proto)
{
nni_socket_t sock;
struct nni_protocol *ops;
int rv;
if ((ops = nni_protocol_find(proto)) == NULL) {
return (NNG_ENOTSUP);
}
if ((sock = nni_alloc(sizeof (*sock))) == NULL) {
return (NNG_ENOMEM);
}
sock->s_ops = *ops;
NNI_LIST_INIT(&sock->s_pipes, struct nng_pipe, p_sock_node);
//NNI_LIST_INIT(&sock->s_eps, nni_endpt_t, ep_node);
if ((rv = sock->s_ops.proto_create(&sock->s_data, sock)) != 0) {
nni_free(sock, sizeof (*sock));
return (rv);
}
*sockp = sock;
return (0);
}
int
nni_socket_close(nni_socket_t sock)
{
nni_pipe_t pipe;
nni_endpt_t ep;
nni_msgqueue_close(sock->s_urq);
/* XXX: drain this? */
nni_msgqueue_close(sock->s_uwq);
nni_mutex_enter(sock->s_mx);
NNI_LIST_FOREACH (&sock->s_eps, ep) {
#if 0
nni_ep_stop(ep);
// OR....
nni_mutex_enter(ep->ep_mx);
ep->ep_stop = 1;
nni_cond_broadcast(ep->ep_cond);
nni_mutex_exit(ep->ep_mx);
#endif
break; /* REMOVE ME */
}
nni_mutex_exit(sock->s_mx);
/* XXX: close endpoints - no new pipes made... */
/* XXX: protocol shutdown */
/*
* Paths to pipe close:
*
* - user calls nng_pipe_close()
* - protocol calls pipe_close() after underlying close
* - socket calls pipe close due to socket_close (here)
*/
/* XXX: close remaining pipes */
while ((pipe = nni_list_first(&sock->s_pipes)) != NULL) {
nni_list_remove(&sock->s_pipes, pipe);
/* XXX: nni_pipe_destroy */
}
/* XXX: wait for workers to cease activity */
while ((ep = nni_list_first(&sock->s_eps)) != NULL) {
nni_list_remove(&sock->s_eps, ep);
/* XXX: nni_ep_destroy(ep); */
}
return (0);
}
int
nni_socket_sendmsg(nni_socket_t sock, nni_msg_t msg, int tmout)
{
int rv;
int besteffort;
/*
* Senderr is typically set by protocols when the state machine
* indicates that it is no longer valid to send a message. E.g.
* a REP socket with no REQ pending.
*/
nni_mutex_enter(sock->s_mx);
if ((rv = sock->s_senderr) != 0) {
nni_mutex_exit(sock->s_mx);
return (rv);
}
besteffort = sock->s_besteffort;
nni_mutex_exit(sock->s_mx);
if (sock->s_ops.proto_send_filter != NULL) {
msg = sock->s_ops.proto_send_filter(sock->s_data, msg);
if (msg == NULL) {
return (0);
}
}
if (besteffort) {
/*
* BestEffort mode -- if we cannot handle the message due to
* backpressure, we just throw it away, and don't complain.
*/
tmout = 0;
}
rv = nni_msgqueue_put(sock->s_uwq, msg, tmout);
if (besteffort && (rv == NNG_EAGAIN)) {
/* Pretend this worked... it didn't, but pretend. */
nni_msg_free(msg);
return (0);
}
return (rv);
}
uint16_t
nni_socket_protocol(nni_socket_t sock)
{
return (sock->s_ops.proto_self);
}
void
nni_socket_remove_pipe(nni_socket_t sock, nni_pipe_t pipe)
{
nni_mutex_enter(sock->s_mx);
if (pipe->p_sock != sock) {
nni_mutex_exit(sock->s_mx);
}
/*
* Remove the pipe from the protocol. Protocols may
* keep lists of pipes for managing their topologies.
*/
sock->s_ops.proto_remove_pipe(sock->s_data, pipe);
/* Now remove it from our own list */
nni_list_remove(&sock->s_pipes, pipe);
pipe->p_sock = NULL;
// XXX: Redial
// XXX: also publish event...
//if (pipe->p_ep != NULL) {
// nn_endpt_remove_pipe(pipe->p_ep, pipe)
//}
nni_mutex_exit(sock->s_mx);
}
int
nni_socket_add_pipe(nni_socket_t sock, nni_pipe_t pipe)
{
int rv;
nni_mutex_enter(sock->s_mx);
if ((rv = sock->s_ops.proto_add_pipe(sock->s_data, pipe)) != 0) {
nni_mutex_exit(sock->s_mx);
return (rv);
}
nni_list_append(&sock->s_pipes, pipe);
pipe->p_sock = sock;
/* XXX: Publish event */
nni_mutex_exit(sock->s_mx);
return (0);
}
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