//
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// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
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// Copyright 2018 Capitar IT Group BV <info@capitar.com>
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//
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// This software is supplied under the terms of the MIT License, a
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// copy of which should be located in the distribution where this
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// file was obtained (LICENSE.txt). A copy of the license may also be
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// found online at https://opensource.org/licenses/MIT.
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//
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#include <stdio.h>
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#include "core/nng_impl.h"
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#include "nng/protocol/reqrep0/req.h"
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// Request protocol. The REQ protocol is the "request" side of a
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// request-reply pair. This is useful for building RPC clients, for example.
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typedef struct req0_pipe req0_pipe;
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typedef struct req0_sock req0_sock;
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typedef struct req0_ctx req0_ctx;
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static void req0_run_send_queue(req0_sock *, nni_list *);
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static void req0_ctx_reset(req0_ctx *);
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static void req0_ctx_timeout(void *);
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static void req0_pipe_fini(void *);
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static void req0_ctx_fini(void *);
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static int req0_ctx_init(void *, void *);
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// A req0_ctx is a "context" for the request. It uses most of the
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// socket, but keeps track of its own outstanding replays, the request ID,
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// and so forth.
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struct req0_ctx {
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req0_sock * sock;
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nni_list_node sock_node; // node on the socket context list
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nni_list_node send_node; // node on the send_queue
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nni_list_node pipe_node; // node on the pipe list
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uint32_t request_id; // request ID, without high bit set
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nni_aio * recv_aio; // user aio waiting to recv - only one!
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nni_aio * send_aio; // user aio waiting to send
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nng_msg * req_msg; // request message (owned by protocol)
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size_t req_len; // length of request message (for stats)
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nng_msg * rep_msg; // reply message
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nni_timer_node timer;
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nni_duration retry;
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bool conn_reset; // sent message w/o retry, peer disconnect
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};
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// A req0_sock is our per-socket protocol private structure.
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struct req0_sock {
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nni_duration retry;
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bool closed;
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nni_atomic_int ttl;
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req0_ctx master; // base socket master
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nni_list ready_pipes;
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nni_list busy_pipes;
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nni_list stop_pipes;
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nni_list contexts;
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nni_list send_queue; // contexts waiting to send.
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nni_id_map requests; // contexts by request ID
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nni_pollable readable;
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nni_pollable writable;
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nni_mtx mtx;
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};
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// A req0_pipe is our per-pipe protocol private structure.
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struct req0_pipe {
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nni_pipe * pipe;
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req0_sock * req;
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nni_list_node node;
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nni_list contexts; // contexts with pending traffic
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bool closed;
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nni_aio aio_send;
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nni_aio aio_recv;
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};
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static void req0_sock_fini(void *);
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static void req0_send_cb(void *);
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static void req0_recv_cb(void *);
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static int
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req0_sock_init(void *arg, nni_sock *sock)
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{
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req0_sock *s = arg;
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NNI_ARG_UNUSED(sock);
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// Request IDs are 32 bits, with the high order bit set.
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// We start at a random point, to minimize likelihood of
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// accidental collision across restarts.
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nni_id_map_init(&s->requests, 0x80000000u, 0xffffffffu, true);
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nni_mtx_init(&s->mtx);
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NNI_LIST_INIT(&s->ready_pipes, req0_pipe, node);
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NNI_LIST_INIT(&s->busy_pipes, req0_pipe, node);
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NNI_LIST_INIT(&s->stop_pipes, req0_pipe, node);
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NNI_LIST_INIT(&s->send_queue, req0_ctx, send_node);
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NNI_LIST_INIT(&s->contexts, req0_ctx, sock_node);
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// this is "semi random" start for request IDs.
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s->retry = NNI_SECOND * 60;
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(void) req0_ctx_init(&s->master, s);
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nni_pollable_init(&s->writable);
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nni_pollable_init(&s->readable);
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nni_atomic_init(&s->ttl);
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nni_atomic_set(&s->ttl, 8);
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return (0);
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}
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static void
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req0_sock_open(void *arg)
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{
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NNI_ARG_UNUSED(arg);
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}
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static void
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req0_sock_close(void *arg)
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{
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req0_sock *s = arg;
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nni_mtx_lock(&s->mtx);
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s->closed = true;
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nni_mtx_unlock(&s->mtx);
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}
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static void
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req0_sock_fini(void *arg)
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{
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req0_sock *s = arg;
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nni_mtx_lock(&s->mtx);
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NNI_ASSERT(nni_list_empty(&s->busy_pipes));
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NNI_ASSERT(nni_list_empty(&s->stop_pipes));
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NNI_ASSERT(nni_list_empty(&s->ready_pipes));
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nni_mtx_unlock(&s->mtx);
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req0_ctx_fini(&s->master);
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nni_pollable_fini(&s->readable);
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nni_pollable_fini(&s->writable);
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nni_id_map_fini(&s->requests);
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nni_mtx_fini(&s->mtx);
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}
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static void
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req0_pipe_stop(void *arg)
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{
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req0_pipe *p = arg;
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req0_sock *s = p->req;
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nni_aio_stop(&p->aio_recv);
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nni_aio_stop(&p->aio_send);
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nni_mtx_lock(&s->mtx);
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nni_list_node_remove(&p->node);
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nni_mtx_unlock(&s->mtx);
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}
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static void
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req0_pipe_fini(void *arg)
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{
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req0_pipe *p = arg;
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nni_aio_fini(&p->aio_recv);
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nni_aio_fini(&p->aio_send);
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}
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static int
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req0_pipe_init(void *arg, nni_pipe *pipe, void *s)
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{
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req0_pipe *p = arg;
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nni_aio_init(&p->aio_recv, req0_recv_cb, p);
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nni_aio_init(&p->aio_send, req0_send_cb, p);
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NNI_LIST_NODE_INIT(&p->node);
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NNI_LIST_INIT(&p->contexts, req0_ctx, pipe_node);
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p->pipe = pipe;
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p->req = s;
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return (0);
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}
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static int
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req0_pipe_start(void *arg)
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{
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req0_pipe *p = arg;
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req0_sock *s = p->req;
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if (nni_pipe_peer(p->pipe) != NNG_REQ0_PEER) {
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return (NNG_EPROTO);
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}
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nni_mtx_lock(&s->mtx);
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nni_list_append(&s->ready_pipes, p);
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nni_pollable_raise(&s->writable);
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req0_run_send_queue(s, NULL);
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nni_mtx_unlock(&s->mtx);
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nni_pipe_recv(p->pipe, &p->aio_recv);
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return (0);
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}
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static void
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req0_pipe_close(void *arg)
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{
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req0_pipe *p = arg;
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req0_sock *s = p->req;
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req0_ctx * ctx;
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nni_aio_close(&p->aio_recv);
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nni_aio_close(&p->aio_send);
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nni_mtx_lock(&s->mtx);
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// This removes the node from either busy_pipes or ready_pipes.
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// It doesn't much matter which. We stick the pipe on the stop
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// list, so that we can wait for that to close down safely.
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p->closed = true;
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nni_list_node_remove(&p->node);
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nni_list_append(&s->stop_pipes, p);
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if (nni_list_empty(&s->ready_pipes)) {
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nni_pollable_clear(&s->writable);
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}
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while ((ctx = nni_list_first(&p->contexts)) != NULL) {
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nni_list_remove(&p->contexts, ctx);
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nng_aio *aio;
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if (ctx->retry <= 0) {
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// If we can't retry, then just cancel the operation
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// altogether. We should only be waiting for recv,
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// because we will already have sent if we are here.
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if ((aio = ctx->recv_aio) != NULL) {
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ctx->recv_aio = NULL;
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nni_aio_finish_error(aio, NNG_ECONNRESET);
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req0_ctx_reset(ctx);
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} else {
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req0_ctx_reset(ctx);
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ctx->conn_reset = true;
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}
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} else {
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// Reset the timer on this so it expires immediately.
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// This is actually easier than canceling the timer and
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// running the send_queue separately. (In particular,
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// it avoids a potential deadlock on cancelling the
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// timer.)
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nni_timer_schedule(&ctx->timer, NNI_TIME_ZERO);
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}
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}
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nni_mtx_unlock(&s->mtx);
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}
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// For cooked mode, we use a context, and send out that way. This
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// completely bypasses the upper write queue. Each context keeps one
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// message pending; these are "scheduled" via the send_queue. The send_queue
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// is ordered, so FIFO ordering between contexts is provided for.
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static void
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req0_send_cb(void *arg)
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{
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req0_pipe *p = arg;
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req0_sock *s = p->req;
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nni_aio * aio;
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nni_list sent_list;
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nni_aio_list_init(&sent_list);
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if (nni_aio_result(&p->aio_send) != 0) {
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// We failed to send... clean up and deal with it.
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nni_msg_free(nni_aio_get_msg(&p->aio_send));
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nni_aio_set_msg(&p->aio_send, NULL);
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nni_pipe_close(p->pipe);
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return;
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}
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// We completed a cooked send, so we need to reinsert ourselves
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// in the ready list, and re-run the send_queue.
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nni_mtx_lock(&s->mtx);
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if (p->closed || s->closed) {
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// This occurs if the req0_pipe_close has been called.
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// In that case we don't want any more processing.
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nni_mtx_unlock(&s->mtx);
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return;
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}
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nni_list_remove(&s->busy_pipes, p);
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nni_list_append(&s->ready_pipes, p);
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if (nni_list_empty(&s->send_queue)) {
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nni_pollable_raise(&s->writable);
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}
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req0_run_send_queue(s, &sent_list);
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nni_mtx_unlock(&s->mtx);
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while ((aio = nni_list_first(&sent_list)) != NULL) {
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nni_list_remove(&sent_list, aio);
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nni_aio_finish_sync(aio, 0, 0);
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}
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}
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static void
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req0_recv_cb(void *arg)
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{
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req0_pipe *p = arg;
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req0_sock *s = p->req;
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req0_ctx * ctx;
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nni_msg * msg;
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nni_aio * aio;
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uint32_t id;
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if (nni_aio_result(&p->aio_recv) != 0) {
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nni_pipe_close(p->pipe);
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return;
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}
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msg = nni_aio_get_msg(&p->aio_recv);
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nni_aio_set_msg(&p->aio_recv, NULL);
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nni_msg_set_pipe(msg, nni_pipe_id(p->pipe));
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// We yank 4 bytes from front of body, and move them to the header.
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if (nni_msg_len(msg) < 4) {
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// Malformed message.
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goto malformed;
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}
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id = nni_msg_trim_u32(msg);
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// Schedule another receive while we are processing this.
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nni_mtx_lock(&s->mtx);
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// NB: If close was called, then this will just abort.
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nni_pipe_recv(p->pipe, &p->aio_recv);
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// Look for a context to receive it.
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if (((ctx = nni_id_get(&s->requests, id)) == NULL) ||
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(ctx->send_aio != NULL) || (ctx->rep_msg != NULL)) {
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nni_mtx_unlock(&s->mtx);
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// No waiting context, we have not sent the request out to
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// the wire yet, or context already has a reply ready.
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// Discard the message.
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nni_msg_free(msg);
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return;
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}
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// We have our match, so we can remove this.
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nni_list_node_remove(&ctx->send_node);
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nni_id_remove(&s->requests, id);
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ctx->request_id = 0;
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if (ctx->req_msg != NULL) {
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nni_msg_free(ctx->req_msg);
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ctx->req_msg = NULL;
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}
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// Is there an aio waiting for us?
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if ((aio = ctx->recv_aio) != NULL) {
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ctx->recv_aio = NULL;
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nni_mtx_unlock(&s->mtx);
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nni_aio_set_msg(aio, msg);
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nni_aio_finish_sync(aio, 0, nni_msg_len(msg));
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} else {
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// No AIO, so stash msg. Receive will pick it up later.
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ctx->rep_msg = msg;
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if (ctx == &s->master) {
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nni_pollable_raise(&s->readable);
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}
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nni_mtx_unlock(&s->mtx);
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}
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return;
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|
malformed:
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nni_msg_free(msg);
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nni_pipe_close(p->pipe);
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}
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static void
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req0_ctx_timeout(void *arg)
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{
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req0_ctx * ctx = arg;
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req0_sock *s = ctx->sock;
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nni_mtx_lock(&s->mtx);
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if ((ctx->req_msg != NULL) && (!s->closed)) {
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if (!nni_list_node_active(&ctx->send_node)) {
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nni_list_append(&s->send_queue, ctx);
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}
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req0_run_send_queue(s, NULL);
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}
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nni_mtx_unlock(&s->mtx);
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}
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static int
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req0_ctx_init(void *arg, void *sock)
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{
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req0_sock *s = sock;
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req0_ctx * ctx = arg;
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nni_timer_init(&ctx->timer, req0_ctx_timeout, ctx);
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nni_mtx_lock(&s->mtx);
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ctx->sock = s;
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ctx->recv_aio = NULL;
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ctx->retry = s->retry;
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nni_list_append(&s->contexts, ctx);
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nni_mtx_unlock(&s->mtx);
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return (0);
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}
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static void
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req0_ctx_fini(void *arg)
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{
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req0_ctx * ctx = arg;
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req0_sock *s = ctx->sock;
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nni_aio * aio;
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nni_mtx_lock(&s->mtx);
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if ((aio = ctx->recv_aio) != NULL) {
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ctx->recv_aio = NULL;
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nni_aio_finish_error(aio, NNG_ECLOSED);
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}
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if ((aio = ctx->send_aio) != NULL) {
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ctx->send_aio = NULL;
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nni_aio_set_msg(aio, ctx->req_msg);
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ctx->req_msg = NULL;
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nni_aio_finish_error(aio, NNG_ECLOSED);
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}
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req0_ctx_reset(ctx);
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nni_list_remove(&s->contexts, ctx);
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nni_mtx_unlock(&s->mtx);
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nni_timer_cancel(&ctx->timer);
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nni_timer_fini(&ctx->timer);
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}
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static int
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req0_ctx_set_resend_time(void *arg, const void *buf, size_t sz, nni_opt_type t)
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{
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req0_ctx *ctx = arg;
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return (nni_copyin_ms(&ctx->retry, buf, sz, t));
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}
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static int
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req0_ctx_get_resend_time(void *arg, void *buf, size_t *szp, nni_opt_type t)
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{
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req0_ctx *ctx = arg;
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return (nni_copyout_ms(ctx->retry, buf, szp, t));
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}
|
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static void
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req0_run_send_queue(req0_sock *s, nni_list *sent_list)
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{
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req0_ctx *ctx;
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nni_aio * aio;
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// Note: This routine should be called with the socket lock held.
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while ((ctx = nni_list_first(&s->send_queue)) != NULL) {
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req0_pipe *p;
|
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if ((p = nni_list_first(&s->ready_pipes)) == NULL) {
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return;
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}
|
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// We have a place to send it, so do the send.
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// If a sending error occurs that causes the message to
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// be dropped, we rely on the resend timer to pick it up.
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// We also notify the completion callback if this is the
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// first send attempt.
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nni_list_remove(&s->send_queue, ctx);
|
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// Schedule a resubmit timer. We only do this if we got
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// a pipe to send to. Otherwise, we should get handled
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// the next time that the send_queue is run. We don't do this
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// if the retry is "disabled" with NNG_DURATION_INFINITE.
|
if (ctx->retry > 0) {
|
nni_timer_schedule(
|
&ctx->timer, nni_clock() + ctx->retry);
|
}
|
|
// Put us on the pipe list of active contexts.
|
// This gives the pipe a chance to kick a resubmit
|
// if the pipe is removed.
|
nni_list_node_remove(&ctx->pipe_node);
|
nni_list_append(&p->contexts, ctx);
|
|
nni_list_remove(&s->ready_pipes, p);
|
nni_list_append(&s->busy_pipes, p);
|
if (nni_list_empty(&s->ready_pipes)) {
|
nni_pollable_clear(&s->writable);
|
}
|
|
if ((aio = ctx->send_aio) != NULL) {
|
ctx->send_aio = NULL;
|
nni_aio_bump_count(aio, ctx->req_len);
|
// If the list was passed in, we want to do a
|
// synchronous completion later.
|
if (sent_list != NULL) {
|
nni_list_append(sent_list, aio);
|
} else {
|
nni_aio_finish(aio, 0, 0);
|
}
|
}
|
|
// At this point, we will never give this message back to
|
// to the user, so we don't have to worry about making it
|
// unique. We can freely clone it.
|
nni_msg_clone(ctx->req_msg);
|
nni_aio_set_msg(&p->aio_send, ctx->req_msg);
|
nni_pipe_send(p->pipe, &p->aio_send);
|
}
|
}
|
|
void
|
req0_ctx_reset(req0_ctx *ctx)
|
{
|
req0_sock *s = ctx->sock;
|
// Call with sock lock held!
|
|
// We cannot safely "wait" using nni_timer_cancel, but this removes
|
// any scheduled timer activation. If the timeout is already running
|
// concurrently, it will still run. It should do nothing, because
|
// we toss the request. There is still a very narrow race if the
|
// timeout fires, but doesn't actually start running before we
|
// both finish this function, *and* manage to reschedule another
|
// request. The consequence of that occurring is that the request
|
// will be emitted on the wire twice. This is not actually tragic.
|
nni_timer_schedule(&ctx->timer, NNI_TIME_NEVER);
|
|
nni_list_node_remove(&ctx->pipe_node);
|
nni_list_node_remove(&ctx->send_node);
|
if (ctx->request_id != 0) {
|
nni_id_remove(&s->requests, ctx->request_id);
|
ctx->request_id = 0;
|
}
|
if (ctx->req_msg != NULL) {
|
nni_msg_free(ctx->req_msg);
|
ctx->req_msg = NULL;
|
}
|
if (ctx->rep_msg != NULL) {
|
nni_msg_free(ctx->rep_msg);
|
ctx->rep_msg = NULL;
|
}
|
ctx->conn_reset = false;
|
}
|
|
static void
|
req0_ctx_cancel_recv(nni_aio *aio, void *arg, int rv)
|
{
|
req0_ctx * ctx = arg;
|
req0_sock *s = ctx->sock;
|
|
nni_mtx_lock(&s->mtx);
|
if (ctx->recv_aio == aio) {
|
ctx->recv_aio = NULL;
|
|
// Cancellation of a pending receive is treated as aborting the
|
// entire state machine. This allows us to preserve the
|
// semantic of exactly one receive operation per send
|
// operation, and should be the least surprising for users. The
|
// main consequence is that if a receive operation is completed
|
// (in error or otherwise), the user must submit a new send
|
// operation to restart the state machine.
|
req0_ctx_reset(ctx);
|
|
nni_aio_finish_error(aio, rv);
|
}
|
nni_mtx_unlock(&s->mtx);
|
}
|
|
static void
|
req0_ctx_recv(void *arg, nni_aio *aio)
|
{
|
req0_ctx * ctx = arg;
|
req0_sock *s = ctx->sock;
|
nni_msg * msg;
|
|
if (nni_aio_begin(aio) != 0) {
|
return;
|
}
|
nni_mtx_lock(&s->mtx);
|
if ((ctx->recv_aio != NULL) ||
|
((ctx->req_msg == NULL) && (ctx->rep_msg == NULL))) {
|
// We have already got a pending receive or have not
|
// tried to send a request yet.
|
// Either of these violate our basic state assumptions.
|
int rv;
|
if (ctx->conn_reset) {
|
ctx->conn_reset = false;
|
rv = NNG_ECONNRESET;
|
} else {
|
rv = NNG_ESTATE;
|
}
|
nni_mtx_unlock(&s->mtx);
|
nni_aio_finish_error(aio, rv);
|
return;
|
}
|
|
if ((msg = ctx->rep_msg) == NULL) {
|
int rv;
|
rv = nni_aio_schedule(aio, req0_ctx_cancel_recv, ctx);
|
if (rv != 0) {
|
nni_mtx_unlock(&s->mtx);
|
nni_aio_finish_error(aio, rv);
|
return;
|
}
|
ctx->recv_aio = aio;
|
nni_mtx_unlock(&s->mtx);
|
return;
|
}
|
|
ctx->rep_msg = NULL;
|
|
// We have got a message to pass up, yay!
|
nni_aio_set_msg(aio, msg);
|
if (ctx == &s->master) {
|
nni_pollable_clear(&s->readable);
|
}
|
nni_mtx_unlock(&s->mtx);
|
nni_aio_finish(aio, 0, nni_msg_len(msg));
|
}
|
|
static void
|
req0_ctx_cancel_send(nni_aio *aio, void *arg, int rv)
|
{
|
req0_ctx * ctx = arg;
|
req0_sock *s = ctx->sock;
|
|
nni_mtx_lock(&s->mtx);
|
if (ctx->send_aio == aio) {
|
// There should not be a pending reply, because we canceled
|
// it while we were waiting.
|
NNI_ASSERT(ctx->recv_aio == NULL);
|
ctx->send_aio = NULL;
|
// Restore the message back to the aio.
|
nni_aio_set_msg(aio, ctx->req_msg);
|
nni_msg_header_clear(ctx->req_msg);
|
ctx->req_msg = NULL;
|
|
// Cancellation of a pending receive is treated as aborting the
|
// entire state machine. This allows us to preserve the
|
// semantic of exactly one receive operation per send
|
// operation, and should be the least surprising for users. The
|
// main consequence is that if a receive operation is completed
|
// (in error or otherwise), the user must submit a new send
|
// operation to restart the state machine.
|
req0_ctx_reset(ctx);
|
|
nni_aio_finish_error(aio, rv);
|
}
|
nni_mtx_unlock(&s->mtx);
|
}
|
|
static void
|
req0_ctx_send(void *arg, nni_aio *aio)
|
{
|
req0_ctx * ctx = arg;
|
req0_sock *s = ctx->sock;
|
nng_msg * msg = nni_aio_get_msg(aio);
|
int rv;
|
|
if (nni_aio_begin(aio) != 0) {
|
return;
|
}
|
nni_mtx_lock(&s->mtx);
|
if (s->closed) {
|
nni_mtx_unlock(&s->mtx);
|
nni_aio_finish_error(aio, NNG_ECLOSED);
|
return;
|
}
|
// Sending a new request cancels the old one, including any
|
// outstanding reply.
|
if (ctx->recv_aio != NULL) {
|
nni_aio_finish_error(ctx->recv_aio, NNG_ECANCELED);
|
ctx->recv_aio = NULL;
|
}
|
if (ctx->send_aio != NULL) {
|
nni_aio_set_msg(ctx->send_aio, ctx->req_msg);
|
nni_msg_header_clear(ctx->req_msg);
|
ctx->req_msg = NULL;
|
nni_aio_finish_error(ctx->send_aio, NNG_ECANCELED);
|
ctx->send_aio = NULL;
|
nni_list_remove(&s->send_queue, ctx);
|
}
|
|
// This resets the entire state machine.
|
req0_ctx_reset(ctx);
|
|
// Insert us on the per ID hash list, so that receives can find us.
|
if ((rv = nni_id_alloc(&s->requests, &ctx->request_id, ctx)) != 0) {
|
nni_mtx_unlock(&s->mtx);
|
nni_aio_finish_error(aio, rv);
|
return;
|
}
|
nni_msg_header_clear(msg);
|
nni_msg_header_append_u32(msg, ctx->request_id);
|
|
// If no pipes are ready, and the request was a poll (no background
|
// schedule), then fail it. Should be NNG_ETIMEDOUT.
|
rv = nni_aio_schedule(aio, req0_ctx_cancel_send, ctx);
|
if ((rv != 0) && (nni_list_empty(&s->ready_pipes))) {
|
nni_id_remove(&s->requests, ctx->request_id);
|
nni_mtx_unlock(&s->mtx);
|
nni_aio_finish_error(aio, rv);
|
return;
|
}
|
ctx->req_len = nni_msg_len(msg);
|
ctx->req_msg = msg;
|
ctx->send_aio = aio;
|
nni_aio_set_msg(aio, NULL);
|
|
// Stick us on the send_queue list.
|
nni_list_append(&s->send_queue, ctx);
|
|
req0_run_send_queue(s, NULL);
|
nni_mtx_unlock(&s->mtx);
|
}
|
|
static void
|
req0_sock_send(void *arg, nni_aio *aio)
|
{
|
req0_sock *s = arg;
|
req0_ctx_send(&s->master, aio);
|
}
|
|
static void
|
req0_sock_recv(void *arg, nni_aio *aio)
|
{
|
req0_sock *s = arg;
|
req0_ctx_recv(&s->master, aio);
|
}
|
|
static int
|
req0_sock_set_max_ttl(void *arg, const void *buf, size_t sz, nni_opt_type t)
|
{
|
req0_sock *s = arg;
|
int ttl;
|
int rv;
|
if ((rv = nni_copyin_int(&ttl, buf, sz, 1, NNI_MAX_MAX_TTL, t)) == 0) {
|
nni_atomic_set(&s->ttl, ttl);
|
}
|
return (rv);
|
}
|
|
static int
|
req0_sock_get_max_ttl(void *arg, void *buf, size_t *szp, nni_opt_type t)
|
{
|
req0_sock *s = arg;
|
return (nni_copyout_int(nni_atomic_get(&s->ttl), buf, szp, t));
|
}
|
|
static int
|
req0_sock_set_resend_time(
|
void *arg, const void *buf, size_t sz, nni_opt_type t)
|
{
|
req0_sock *s = arg;
|
int rv;
|
rv = req0_ctx_set_resend_time(&s->master, buf, sz, t);
|
s->retry = s->master.retry;
|
return (rv);
|
}
|
|
static int
|
req0_sock_get_resend_time(void *arg, void *buf, size_t *szp, nni_opt_type t)
|
{
|
req0_sock *s = arg;
|
return (req0_ctx_get_resend_time(&s->master, buf, szp, t));
|
}
|
|
static int
|
req0_sock_get_send_fd(void *arg, void *buf, size_t *szp, nni_opt_type t)
|
{
|
req0_sock *s = arg;
|
int rv;
|
int fd;
|
|
if ((rv = nni_pollable_getfd(&s->writable, &fd)) != 0) {
|
return (rv);
|
}
|
return (nni_copyout_int(fd, buf, szp, t));
|
}
|
|
static int
|
req0_sock_get_recv_fd(void *arg, void *buf, size_t *szp, nni_opt_type t)
|
{
|
req0_sock *s = arg;
|
int rv;
|
int fd;
|
|
if ((rv = nni_pollable_getfd(&s->readable, &fd)) != 0) {
|
return (rv);
|
}
|
|
return (nni_copyout_int(fd, buf, szp, t));
|
}
|
|
static nni_proto_pipe_ops req0_pipe_ops = {
|
.pipe_size = sizeof(req0_pipe),
|
.pipe_init = req0_pipe_init,
|
.pipe_fini = req0_pipe_fini,
|
.pipe_start = req0_pipe_start,
|
.pipe_close = req0_pipe_close,
|
.pipe_stop = req0_pipe_stop,
|
};
|
|
static nni_option req0_ctx_options[] = {
|
{
|
.o_name = NNG_OPT_REQ_RESENDTIME,
|
.o_get = req0_ctx_get_resend_time,
|
.o_set = req0_ctx_set_resend_time,
|
},
|
{
|
.o_name = NULL,
|
},
|
};
|
|
static nni_proto_ctx_ops req0_ctx_ops = {
|
.ctx_size = sizeof(req0_ctx),
|
.ctx_init = req0_ctx_init,
|
.ctx_fini = req0_ctx_fini,
|
.ctx_recv = req0_ctx_recv,
|
.ctx_send = req0_ctx_send,
|
.ctx_options = req0_ctx_options,
|
};
|
|
static nni_option req0_sock_options[] = {
|
{
|
.o_name = NNG_OPT_MAXTTL,
|
.o_get = req0_sock_get_max_ttl,
|
.o_set = req0_sock_set_max_ttl,
|
},
|
{
|
.o_name = NNG_OPT_REQ_RESENDTIME,
|
.o_get = req0_sock_get_resend_time,
|
.o_set = req0_sock_set_resend_time,
|
},
|
{
|
.o_name = NNG_OPT_RECVFD,
|
.o_get = req0_sock_get_recv_fd,
|
},
|
{
|
.o_name = NNG_OPT_SENDFD,
|
.o_get = req0_sock_get_send_fd,
|
},
|
// terminate list
|
{
|
.o_name = NULL,
|
},
|
};
|
|
static nni_proto_sock_ops req0_sock_ops = {
|
.sock_size = sizeof(req0_sock),
|
.sock_init = req0_sock_init,
|
.sock_fini = req0_sock_fini,
|
.sock_open = req0_sock_open,
|
.sock_close = req0_sock_close,
|
.sock_options = req0_sock_options,
|
.sock_send = req0_sock_send,
|
.sock_recv = req0_sock_recv,
|
};
|
|
static nni_proto req0_proto = {
|
.proto_version = NNI_PROTOCOL_VERSION,
|
.proto_self = { NNG_REQ0_SELF, NNG_REQ0_SELF_NAME },
|
.proto_peer = { NNG_REQ0_PEER, NNG_REQ0_PEER_NAME },
|
.proto_flags = NNI_PROTO_FLAG_SNDRCV,
|
.proto_sock_ops = &req0_sock_ops,
|
.proto_pipe_ops = &req0_pipe_ops,
|
.proto_ctx_ops = &req0_ctx_ops,
|
};
|
|
int
|
nng_req0_open(nng_socket *sock)
|
{
|
return (nni_proto_open(sock, &req0_proto));
|
}
|
