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-rw-r--r--src/sp/protocol/reqrep0/req.c869
1 files changed, 869 insertions, 0 deletions
diff --git a/src/sp/protocol/reqrep0/req.c b/src/sp/protocol/reqrep0/req.c
new file mode 100644
index 00000000..cb3c9395
--- /dev/null
+++ b/src/sp/protocol/reqrep0/req.c
@@ -0,0 +1,869 @@
+//
+// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// 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 <stdio.h>
+
+#include "core/nng_impl.h"
+#include "nng/protocol/reqrep0/req.h"
+
+// Request protocol. The REQ protocol is the "request" side of a
+// request-reply pair. This is useful for building RPC clients, for example.
+
+typedef struct req0_pipe req0_pipe;
+typedef struct req0_sock req0_sock;
+typedef struct req0_ctx req0_ctx;
+
+static void req0_run_send_queue(req0_sock *, nni_list *);
+static void req0_ctx_reset(req0_ctx *);
+static void req0_ctx_timeout(void *);
+static void req0_pipe_fini(void *);
+static void req0_ctx_fini(void *);
+static int req0_ctx_init(void *, void *);
+
+// A req0_ctx is a "context" for the request. It uses most of the
+// socket, but keeps track of its own outstanding replays, the request ID,
+// and so forth.
+struct req0_ctx {
+ req0_sock * sock;
+ nni_list_node sock_node; // node on the socket context list
+ nni_list_node send_node; // node on the send_queue
+ nni_list_node pipe_node; // node on the pipe list
+ uint32_t request_id; // request ID, without high bit set
+ nni_aio * recv_aio; // user aio waiting to recv - only one!
+ nni_aio * send_aio; // user aio waiting to send
+ nng_msg * req_msg; // request message (owned by protocol)
+ size_t req_len; // length of request message (for stats)
+ nng_msg * rep_msg; // reply message
+ nni_timer_node timer;
+ nni_duration retry;
+ bool conn_reset; // sent message w/o retry, peer disconnect
+};
+
+// A req0_sock is our per-socket protocol private structure.
+struct req0_sock {
+ nni_duration retry;
+ bool closed;
+ nni_atomic_int ttl;
+ req0_ctx master; // base socket master
+ nni_list ready_pipes;
+ nni_list busy_pipes;
+ nni_list stop_pipes;
+ nni_list contexts;
+ nni_list send_queue; // contexts waiting to send.
+ nni_id_map requests; // contexts by request ID
+ nni_pollable readable;
+ nni_pollable writable;
+ nni_mtx mtx;
+};
+
+// A req0_pipe is our per-pipe protocol private structure.
+struct req0_pipe {
+ nni_pipe * pipe;
+ req0_sock * req;
+ nni_list_node node;
+ nni_list contexts; // contexts with pending traffic
+ bool closed;
+ nni_aio aio_send;
+ nni_aio aio_recv;
+};
+
+static void req0_sock_fini(void *);
+static void req0_send_cb(void *);
+static void req0_recv_cb(void *);
+
+static int
+req0_sock_init(void *arg, nni_sock *sock)
+{
+ req0_sock *s = arg;
+
+ NNI_ARG_UNUSED(sock);
+
+ // Request IDs are 32 bits, with the high order bit set.
+ // We start at a random point, to minimize likelihood of
+ // accidental collision across restarts.
+ nni_id_map_init(&s->requests, 0x80000000u, 0xffffffffu, true);
+
+ nni_mtx_init(&s->mtx);
+
+ NNI_LIST_INIT(&s->ready_pipes, req0_pipe, node);
+ NNI_LIST_INIT(&s->busy_pipes, req0_pipe, node);
+ NNI_LIST_INIT(&s->stop_pipes, req0_pipe, node);
+ NNI_LIST_INIT(&s->send_queue, req0_ctx, send_node);
+ NNI_LIST_INIT(&s->contexts, req0_ctx, sock_node);
+
+ // this is "semi random" start for request IDs.
+ s->retry = NNI_SECOND * 60;
+
+ (void) req0_ctx_init(&s->master, s);
+
+ nni_pollable_init(&s->writable);
+ nni_pollable_init(&s->readable);
+
+ nni_atomic_init(&s->ttl);
+ nni_atomic_set(&s->ttl, 8);
+ return (0);
+}
+
+static void
+req0_sock_open(void *arg)
+{
+ NNI_ARG_UNUSED(arg);
+}
+
+static void
+req0_sock_close(void *arg)
+{
+ req0_sock *s = arg;
+
+ nni_mtx_lock(&s->mtx);
+ s->closed = true;
+ nni_mtx_unlock(&s->mtx);
+}
+
+static void
+req0_sock_fini(void *arg)
+{
+ req0_sock *s = arg;
+
+ nni_mtx_lock(&s->mtx);
+ NNI_ASSERT(nni_list_empty(&s->busy_pipes));
+ NNI_ASSERT(nni_list_empty(&s->stop_pipes));
+ NNI_ASSERT(nni_list_empty(&s->ready_pipes));
+ nni_mtx_unlock(&s->mtx);
+
+ req0_ctx_fini(&s->master);
+ nni_pollable_fini(&s->readable);
+ nni_pollable_fini(&s->writable);
+ nni_id_map_fini(&s->requests);
+ nni_mtx_fini(&s->mtx);
+}
+
+static void
+req0_pipe_stop(void *arg)
+{
+ req0_pipe *p = arg;
+ req0_sock *s = p->req;
+
+ nni_aio_stop(&p->aio_recv);
+ nni_aio_stop(&p->aio_send);
+ nni_mtx_lock(&s->mtx);
+ nni_list_node_remove(&p->node);
+ nni_mtx_unlock(&s->mtx);
+}
+
+static void
+req0_pipe_fini(void *arg)
+{
+ req0_pipe *p = arg;
+
+ nni_aio_fini(&p->aio_recv);
+ nni_aio_fini(&p->aio_send);
+}
+
+static int
+req0_pipe_init(void *arg, nni_pipe *pipe, void *s)
+{
+ req0_pipe *p = arg;
+
+ nni_aio_init(&p->aio_recv, req0_recv_cb, p);
+ nni_aio_init(&p->aio_send, req0_send_cb, p);
+ NNI_LIST_NODE_INIT(&p->node);
+ NNI_LIST_INIT(&p->contexts, req0_ctx, pipe_node);
+ p->pipe = pipe;
+ p->req = s;
+ return (0);
+}
+
+static int
+req0_pipe_start(void *arg)
+{
+ req0_pipe *p = arg;
+ req0_sock *s = p->req;
+
+ if (nni_pipe_peer(p->pipe) != NNG_REQ0_PEER) {
+ return (NNG_EPROTO);
+ }
+
+ nni_mtx_lock(&s->mtx);
+ nni_list_append(&s->ready_pipes, p);
+ nni_pollable_raise(&s->writable);
+ req0_run_send_queue(s, NULL);
+ nni_mtx_unlock(&s->mtx);
+
+ nni_pipe_recv(p->pipe, &p->aio_recv);
+ return (0);
+}
+
+static void
+req0_pipe_close(void *arg)
+{
+ req0_pipe *p = arg;
+ req0_sock *s = p->req;
+ req0_ctx * ctx;
+
+ nni_aio_close(&p->aio_recv);
+ nni_aio_close(&p->aio_send);
+
+ nni_mtx_lock(&s->mtx);
+ // This removes the node from either busy_pipes or ready_pipes.
+ // It doesn't much matter which. We stick the pipe on the stop
+ // list, so that we can wait for that to close down safely.
+ p->closed = true;
+ nni_list_node_remove(&p->node);
+ nni_list_append(&s->stop_pipes, p);
+ if (nni_list_empty(&s->ready_pipes)) {
+ nni_pollable_clear(&s->writable);
+ }
+
+ while ((ctx = nni_list_first(&p->contexts)) != NULL) {
+ nni_list_remove(&p->contexts, ctx);
+ nng_aio *aio;
+ if (ctx->retry <= 0) {
+ // If we can't retry, then just cancel the operation
+ // altogether. We should only be waiting for recv,
+ // because we will already have sent if we are here.
+ if ((aio = ctx->recv_aio) != NULL) {
+ ctx->recv_aio = NULL;
+ nni_aio_finish_error(aio, NNG_ECONNRESET);
+ req0_ctx_reset(ctx);
+ } else {
+ req0_ctx_reset(ctx);
+ ctx->conn_reset = true;
+ }
+ } else {
+ // Reset the timer on this so it expires immediately.
+ // This is actually easier than canceling the timer and
+ // running the send_queue separately. (In particular,
+ // it avoids a potential deadlock on cancelling the
+ // timer.)
+ nni_timer_schedule(&ctx->timer, NNI_TIME_ZERO);
+ }
+ }
+ nni_mtx_unlock(&s->mtx);
+}
+
+// For cooked mode, we use a context, and send out that way. This
+// completely bypasses the upper write queue. Each context keeps one
+// message pending; these are "scheduled" via the send_queue. The send_queue
+// is ordered, so FIFO ordering between contexts is provided for.
+
+static void
+req0_send_cb(void *arg)
+{
+ req0_pipe *p = arg;
+ req0_sock *s = p->req;
+ nni_aio * aio;
+ nni_list sent_list;
+
+ nni_aio_list_init(&sent_list);
+ if (nni_aio_result(&p->aio_send) != 0) {
+ // We failed to send... clean up and deal with it.
+ nni_msg_free(nni_aio_get_msg(&p->aio_send));
+ nni_aio_set_msg(&p->aio_send, NULL);
+ nni_pipe_close(p->pipe);
+ return;
+ }
+
+ // We completed a cooked send, so we need to reinsert ourselves
+ // in the ready list, and re-run the send_queue.
+
+ nni_mtx_lock(&s->mtx);
+ if (p->closed || s->closed) {
+ // This occurs if the req0_pipe_close has been called.
+ // In that case we don't want any more processing.
+ nni_mtx_unlock(&s->mtx);
+ return;
+ }
+ nni_list_remove(&s->busy_pipes, p);
+ nni_list_append(&s->ready_pipes, p);
+ if (nni_list_empty(&s->send_queue)) {
+ nni_pollable_raise(&s->writable);
+ }
+ req0_run_send_queue(s, &sent_list);
+ nni_mtx_unlock(&s->mtx);
+
+ while ((aio = nni_list_first(&sent_list)) != NULL) {
+ nni_list_remove(&sent_list, aio);
+ nni_aio_finish_sync(aio, 0, 0);
+ }
+}
+
+static void
+req0_recv_cb(void *arg)
+{
+ req0_pipe *p = arg;
+ req0_sock *s = p->req;
+ req0_ctx * ctx;
+ nni_msg * msg;
+ nni_aio * aio;
+ uint32_t id;
+
+ if (nni_aio_result(&p->aio_recv) != 0) {
+ nni_pipe_close(p->pipe);
+ return;
+ }
+
+ msg = nni_aio_get_msg(&p->aio_recv);
+ nni_aio_set_msg(&p->aio_recv, NULL);
+ nni_msg_set_pipe(msg, nni_pipe_id(p->pipe));
+
+ // We yank 4 bytes from front of body, and move them to the header.
+ if (nni_msg_len(msg) < 4) {
+ // Malformed message.
+ goto malformed;
+ }
+ id = nni_msg_trim_u32(msg);
+
+ // Schedule another receive while we are processing this.
+ nni_mtx_lock(&s->mtx);
+
+ // NB: If close was called, then this will just abort.
+ nni_pipe_recv(p->pipe, &p->aio_recv);
+
+ // Look for a context to receive it.
+ if (((ctx = nni_id_get(&s->requests, id)) == NULL) ||
+ (ctx->send_aio != NULL) || (ctx->rep_msg != NULL)) {
+ nni_mtx_unlock(&s->mtx);
+ // No waiting context, we have not sent the request out to
+ // the wire yet, or context already has a reply ready.
+ // Discard the message.
+ nni_msg_free(msg);
+ return;
+ }
+
+ // We have our match, so we can remove this.
+ nni_list_node_remove(&ctx->send_node);
+ nni_id_remove(&s->requests, id);
+ ctx->request_id = 0;
+ if (ctx->req_msg != NULL) {
+ nni_msg_free(ctx->req_msg);
+ ctx->req_msg = NULL;
+ }
+
+ // Is there an aio waiting for us?
+ if ((aio = ctx->recv_aio) != NULL) {
+ ctx->recv_aio = NULL;
+ nni_mtx_unlock(&s->mtx);
+ nni_aio_set_msg(aio, msg);
+ nni_aio_finish_sync(aio, 0, nni_msg_len(msg));
+ } else {
+ // No AIO, so stash msg. Receive will pick it up later.
+ ctx->rep_msg = msg;
+ if (ctx == &s->master) {
+ nni_pollable_raise(&s->readable);
+ }
+ nni_mtx_unlock(&s->mtx);
+ }
+ return;
+
+malformed:
+ nni_msg_free(msg);
+ nni_pipe_close(p->pipe);
+}
+
+static void
+req0_ctx_timeout(void *arg)
+{
+ req0_ctx * ctx = arg;
+ req0_sock *s = ctx->sock;
+
+ nni_mtx_lock(&s->mtx);
+ if ((ctx->req_msg != NULL) && (!s->closed)) {
+ if (!nni_list_node_active(&ctx->send_node)) {
+ nni_list_append(&s->send_queue, ctx);
+ }
+ req0_run_send_queue(s, NULL);
+ }
+ nni_mtx_unlock(&s->mtx);
+}
+
+static int
+req0_ctx_init(void *arg, void *sock)
+{
+ req0_sock *s = sock;
+ req0_ctx * ctx = arg;
+
+ nni_timer_init(&ctx->timer, req0_ctx_timeout, ctx);
+
+ nni_mtx_lock(&s->mtx);
+ ctx->sock = s;
+ ctx->recv_aio = NULL;
+ ctx->retry = s->retry;
+ nni_list_append(&s->contexts, ctx);
+ nni_mtx_unlock(&s->mtx);
+
+ return (0);
+}
+
+static void
+req0_ctx_fini(void *arg)
+{
+ req0_ctx * ctx = arg;
+ req0_sock *s = ctx->sock;
+ nni_aio * aio;
+
+ nni_mtx_lock(&s->mtx);
+ if ((aio = ctx->recv_aio) != NULL) {
+ ctx->recv_aio = NULL;
+ nni_aio_finish_error(aio, NNG_ECLOSED);
+ }
+ if ((aio = ctx->send_aio) != NULL) {
+ ctx->send_aio = NULL;
+ nni_aio_set_msg(aio, ctx->req_msg);
+ ctx->req_msg = NULL;
+ nni_aio_finish_error(aio, NNG_ECLOSED);
+ }
+ req0_ctx_reset(ctx);
+ nni_list_remove(&s->contexts, ctx);
+ nni_mtx_unlock(&s->mtx);
+
+ nni_timer_cancel(&ctx->timer);
+ nni_timer_fini(&ctx->timer);
+}
+
+static int
+req0_ctx_set_resend_time(void *arg, const void *buf, size_t sz, nni_opt_type t)
+{
+ req0_ctx *ctx = arg;
+ return (nni_copyin_ms(&ctx->retry, buf, sz, t));
+}
+
+static int
+req0_ctx_get_resend_time(void *arg, void *buf, size_t *szp, nni_opt_type t)
+{
+ req0_ctx *ctx = arg;
+ return (nni_copyout_ms(ctx->retry, buf, szp, t));
+}
+
+static void
+req0_run_send_queue(req0_sock *s, nni_list *sent_list)
+{
+ req0_ctx *ctx;
+ nni_aio * aio;
+
+ // Note: This routine should be called with the socket lock held.
+ while ((ctx = nni_list_first(&s->send_queue)) != NULL) {
+ req0_pipe *p;
+
+ if ((p = nni_list_first(&s->ready_pipes)) == NULL) {
+ return;
+ }
+
+ // We have a place to send it, so do the send.
+ // If a sending error occurs that causes the message to
+ // be dropped, we rely on the resend timer to pick it up.
+ // We also notify the completion callback if this is the
+ // first send attempt.
+ nni_list_remove(&s->send_queue, ctx);
+
+ // Schedule a resubmit timer. We only do this if we got
+ // a pipe to send to. Otherwise, we should get handled
+ // the next time that the send_queue is run. We don't do this
+ // 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));
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2026-01-18 17:05:22 +0000