1 files changed, 0 insertions, 432 deletions
diff --git a/src/protocol/reqrep0/xrep.c b/src/protocol/reqrep0/xrep.c
deleted file mode 100644
index 9737c600..00000000
--- a/src/protocol/reqrep0/xrep.c
+++ /dev/null
@@ -1,432 +0,0 @@
-//
-// 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 <string.h>
-
-#include "core/nng_impl.h"
-#include "nng/protocol/reqrep0/rep.h"
-
-// Response protocol in raw mode.  The REP protocol is the "reply" side of a
-// request-reply pair.  This is useful for building RPC servers, for
-// example.
-
-typedef struct xrep0_pipe xrep0_pipe;
-typedef struct xrep0_sock xrep0_sock;
-
-static void xrep0_sock_getq_cb(void *);
-static void xrep0_pipe_getq_cb(void *);
-static void xrep0_pipe_putq_cb(void *);
-static void xrep0_pipe_send_cb(void *);
-static void xrep0_pipe_recv_cb(void *);
-static void xrep0_pipe_fini(void *);
-
-// xrep0_sock is our per-socket protocol private structure.
-struct xrep0_sock {
-	nni_msgq *     uwq;
-	nni_msgq *     urq;
-	nni_mtx        lk;
-	nni_atomic_int ttl;
-	nni_id_map     pipes;
-	nni_aio        aio_getq;
-};
-
-// xrep0_pipe is our per-pipe protocol private structure.
-struct xrep0_pipe {
-	nni_pipe *  pipe;
-	xrep0_sock *rep;
-	nni_msgq *  sendq;
-	nni_aio     aio_getq;
-	nni_aio     aio_send;
-	nni_aio     aio_recv;
-	nni_aio     aio_putq;
-};
-
-static void
-xrep0_sock_fini(void *arg)
-{
-	xrep0_sock *s = arg;
-
-	nni_aio_fini(&s->aio_getq);
-	nni_id_map_fini(&s->pipes);
-	nni_mtx_fini(&s->lk);
-}
-
-static int
-xrep0_sock_init(void *arg, nni_sock *sock)
-{
-	xrep0_sock *s = arg;
-
-	nni_mtx_init(&s->lk);
-	nni_aio_init(&s->aio_getq, xrep0_sock_getq_cb, s);
-	nni_atomic_init(&s->ttl);
-	nni_atomic_set(&s->ttl, 8); // Per RFC
-	s->uwq = nni_sock_sendq(sock);
-	s->urq = nni_sock_recvq(sock);
-
-	nni_id_map_init(&s->pipes, 0, 0, false);
-	return (0);
-}
-
-static void
-xrep0_sock_open(void *arg)
-{
-	xrep0_sock *s = arg;
-
-	// This starts us retrieving message from the upper write q.
-	nni_msgq_aio_get(s->uwq, &s->aio_getq);
-}
-
-static void
-xrep0_sock_close(void *arg)
-{
-	xrep0_sock *s = arg;
-
-	nni_aio_close(&s->aio_getq);
-}
-
-static void
-xrep0_pipe_stop(void *arg)
-{
-	xrep0_pipe *p = arg;
-
-	nni_aio_stop(&p->aio_getq);
-	nni_aio_stop(&p->aio_send);
-	nni_aio_stop(&p->aio_recv);
-	nni_aio_stop(&p->aio_putq);
-}
-
-static void
-xrep0_pipe_fini(void *arg)
-{
-	xrep0_pipe *p = arg;
-
-	nni_aio_fini(&p->aio_getq);
-	nni_aio_fini(&p->aio_send);
-	nni_aio_fini(&p->aio_recv);
-	nni_aio_fini(&p->aio_putq);
-	nni_msgq_fini(p->sendq);
-}
-
-static int
-xrep0_pipe_init(void *arg, nni_pipe *pipe, void *s)
-{
-	xrep0_pipe *p = arg;
-	int         rv;
-
-	nni_aio_init(&p->aio_getq, xrep0_pipe_getq_cb, p);
-	nni_aio_init(&p->aio_send, xrep0_pipe_send_cb, p);
-	nni_aio_init(&p->aio_recv, xrep0_pipe_recv_cb, p);
-	nni_aio_init(&p->aio_putq, xrep0_pipe_putq_cb, p);
-
-	p->pipe = pipe;
-	p->rep  = s;
-
-	// We want a pretty deep send queue on pipes. The rationale here is
-	// that the send rate will be mitigated by the receive rate.
-	// If a slow pipe (req pipe not reading its own responses!?)
-	// comes up, then we will start discarding its replies eventually,
-	// but it takes some time.  It would be poor form for a peer to
-	// smash us with requests, but be unable to handle replies faster
-	// than we can forward them.  If they do that, their replies get
-	// dropped.  (From a DDoS perspective, it might be nice in the
-	// future if we had a way to exert back pressure to the send side --
-	// essentially don't let peers send requests faster than they are
-	// willing to receive replies.  Something to think about for the
-	// future.)
-	if ((rv = nni_msgq_init(&p->sendq, 64)) != 0) {
-		xrep0_pipe_fini(p);
-		return (rv);
-	}
-	return (0);
-}
-
-static int
-xrep0_pipe_start(void *arg)
-{
-	xrep0_pipe *p = arg;
-	xrep0_sock *s = p->rep;
-	int         rv;
-
-	if (nni_pipe_peer(p->pipe) != NNG_REP0_PEER) {
-		// Peer protocol mismatch.
-		return (NNG_EPROTO);
-	}
-
-	nni_mtx_lock(&s->lk);
-	rv = nni_id_set(&s->pipes, nni_pipe_id(p->pipe), p);
-	nni_mtx_unlock(&s->lk);
-	if (rv != 0) {
-		return (rv);
-	}
-
-	nni_msgq_aio_get(p->sendq, &p->aio_getq);
-	nni_pipe_recv(p->pipe, &p->aio_recv);
-	return (0);
-}
-
-static void
-xrep0_pipe_close(void *arg)
-{
-	xrep0_pipe *p = arg;
-	xrep0_sock *s = p->rep;
-
-	nni_aio_close(&p->aio_getq);
-	nni_aio_close(&p->aio_send);
-	nni_aio_close(&p->aio_recv);
-	nni_aio_close(&p->aio_putq);
-	nni_msgq_close(p->sendq);
-
-	nni_mtx_lock(&s->lk);
-	nni_id_remove(&s->pipes, nni_pipe_id(p->pipe));
-	nni_mtx_unlock(&s->lk);
-}
-
-static void
-xrep0_sock_getq_cb(void *arg)
-{
-	xrep0_sock *s   = arg;
-	nni_msgq *  uwq = s->uwq;
-	nni_msg *   msg;
-	uint32_t    id;
-	xrep0_pipe *p;
-
-	// This watches for messages from the upper write queue,
-	// extracts the destination pipe, and forwards it to the appropriate
-	// destination pipe via a separate queue.  This prevents a single bad
-	// or slow pipe from gumming up the works for the entire socket.
-
-	if (nni_aio_result(&s->aio_getq) != 0) {
-		// Closed socket?
-		return;
-	}
-
-	msg = nni_aio_get_msg(&s->aio_getq);
-	nni_aio_set_msg(&s->aio_getq, NULL);
-
-	// We yank the outgoing pipe id from the header
-	if (nni_msg_header_len(msg) < 4) {
-		nni_msg_free(msg);
-
-		// Look for another message on the upper write queue.
-		nni_msgq_aio_get(uwq, &s->aio_getq);
-		return;
-	}
-
-	id = nni_msg_header_trim_u32(msg);
-
-	// Look for the pipe, and attempt to put the message there
-	// (non-blocking) if we can.  If we can't for any reason, then we
-	// free the message.
-	nni_mtx_lock(&s->lk);
-	if (((p = nni_id_get(&s->pipes, id)) == NULL) ||
-	    (nni_msgq_tryput(p->sendq, msg) != 0)) {
-		nni_msg_free(msg);
-	}
-	nni_mtx_unlock(&s->lk);
-
-	// Now look for another message on the upper write queue.
-	nni_msgq_aio_get(uwq, &s->aio_getq);
-}
-
-static void
-xrep0_pipe_getq_cb(void *arg)
-{
-	xrep0_pipe *p = arg;
-
-	if (nni_aio_result(&p->aio_getq) != 0) {
-		nni_pipe_close(p->pipe);
-		return;
-	}
-
-	nni_aio_set_msg(&p->aio_send, nni_aio_get_msg(&p->aio_getq));
-	nni_aio_set_msg(&p->aio_getq, NULL);
-
-	nni_pipe_send(p->pipe, &p->aio_send);
-}
-
-static void
-xrep0_pipe_send_cb(void *arg)
-{
-	xrep0_pipe *p = arg;
-
-	if (nni_aio_result(&p->aio_send) != 0) {
-		nni_msg_free(nni_aio_get_msg(&p->aio_send));
-		nni_aio_set_msg(&p->aio_send, NULL);
-		nni_pipe_close(p->pipe);
-		return;
-	}
-
-	nni_msgq_aio_get(p->sendq, &p->aio_getq);
-}
-
-static void
-xrep0_pipe_recv_cb(void *arg)
-{
-	xrep0_pipe *p = arg;
-	xrep0_sock *s = p->rep;
-	nni_msg *   msg;
-	int         hops;
-	int         ttl;
-
-	if (nni_aio_result(&p->aio_recv) != 0) {
-		nni_pipe_close(p->pipe);
-		return;
-	}
-
-	ttl = nni_atomic_get(&s->ttl);
-
-	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));
-
-	// Store the pipe id in the header, first thing.
-	nni_msg_header_append_u32(msg, nni_pipe_id(p->pipe));
-
-	// Move backtrace from body to header
-	hops = 1;
-	for (;;) {
-		bool     end;
-		uint8_t *body;
-		if (hops > ttl) {
-			// This isn't malformed, but it has gone through
-			// too many hops.  Do not disconnect, because we
-			// can legitimately receive messages with too many
-			// hops from devices, etc.
-			goto drop;
-		}
-		hops++;
-		if (nni_msg_len(msg) < 4) {
-			// Peer is speaking garbage. Kick it.
-			nni_msg_free(msg);
-			nni_pipe_close(p->pipe);
-			return;
-		}
-		body = nni_msg_body(msg);
-		end  = ((body[0] & 0x80u) != 0);
-		if (nni_msg_header_append(msg, body, 4) != 0) {
-			// Out of memory most likely, but keep going to
-			// avoid breaking things.
-			goto drop;
-		}
-		nni_msg_trim(msg, 4);
-		if (end) {
-			break;
-		}
-	}
-
-	// Go ahead and send it up.
-	nni_aio_set_msg(&p->aio_putq, msg);
-	nni_msgq_aio_put(s->urq, &p->aio_putq);
-	return;
-
-drop:
-	nni_msg_free(msg);
-	nni_pipe_recv(p->pipe, &p->aio_recv);
-}
-
-static void
-xrep0_pipe_putq_cb(void *arg)
-{
-	xrep0_pipe *p = arg;
-
-	if (nni_aio_result(&p->aio_putq) != 0) {
-		nni_msg_free(nni_aio_get_msg(&p->aio_putq));
-		nni_aio_set_msg(&p->aio_putq, NULL);
-		nni_pipe_close(p->pipe);
-		return;
-	}
-
-	nni_pipe_recv(p->pipe, &p->aio_recv);
-}
-
-static int
-xrep0_sock_set_maxttl(void *arg, const void *buf, size_t sz, nni_opt_type t)
-{
-	xrep0_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
-xrep0_sock_get_maxttl(void *arg, void *buf, size_t *szp, nni_opt_type t)
-{
-	xrep0_sock *s = arg;
-	return (nni_copyout_int(nni_atomic_get(&s->ttl), buf, szp, t));
-}
-
-static void
-xrep0_sock_send(void *arg, nni_aio *aio)
-{
-	xrep0_sock *s = arg;
-
-	nni_msgq_aio_put(s->uwq, aio);
-}
-
-static void
-xrep0_sock_recv(void *arg, nni_aio *aio)
-{
-	xrep0_sock *s = arg;
-
-	nni_msgq_aio_get(s->urq, aio);
-}
-
-// This is the global protocol structure -- our linkage to the core.
-// This should be the only global non-static symbol in this file.
-static nni_proto_pipe_ops xrep0_pipe_ops = {
-	.pipe_size  = sizeof(xrep0_pipe),
-	.pipe_init  = xrep0_pipe_init,
-	.pipe_fini  = xrep0_pipe_fini,
-	.pipe_start = xrep0_pipe_start,
-	.pipe_close = xrep0_pipe_close,
-	.pipe_stop  = xrep0_pipe_stop,
-};
-
-static nni_option xrep0_sock_options[] = {
-	{
-	    .o_name = NNG_OPT_MAXTTL,
-	    .o_get  = xrep0_sock_get_maxttl,
-	    .o_set  = xrep0_sock_set_maxttl,
-	},
-	// terminate list
-	{
-	    .o_name = NULL,
-	},
-};
-
-static nni_proto_sock_ops xrep0_sock_ops = {
-	.sock_size    = sizeof(xrep0_sock),
-	.sock_init    = xrep0_sock_init,
-	.sock_fini    = xrep0_sock_fini,
-	.sock_open    = xrep0_sock_open,
-	.sock_close   = xrep0_sock_close,
-	.sock_options = xrep0_sock_options,
-	.sock_send    = xrep0_sock_send,
-	.sock_recv    = xrep0_sock_recv,
-};
-
-static nni_proto xrep0_proto = {
-	.proto_version  = NNI_PROTOCOL_VERSION,
-	.proto_self     = { NNG_REP0_SELF, NNG_REP0_SELF_NAME },
-	.proto_peer     = { NNG_REP0_PEER, NNG_REP0_PEER_NAME },
-	.proto_flags    = NNI_PROTO_FLAG_SNDRCV | NNI_PROTO_FLAG_RAW,
-	.proto_sock_ops = &xrep0_sock_ops,
-	.proto_pipe_ops = &xrep0_pipe_ops,
-};
-
-int
-nng_rep0_open_raw(nng_socket *sidp)
-{
-	return (nni_proto_open(sidp, &xrep0_proto));
-}