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Diffstat (limited to 'src/protocol/survey0/xsurvey.c')
-rw-r--r--src/protocol/survey0/xsurvey.c379
1 files changed, 0 insertions, 379 deletions
diff --git a/src/protocol/survey0/xsurvey.c b/src/protocol/survey0/xsurvey.c
deleted file mode 100644
index 2a198662..00000000
--- a/src/protocol/survey0/xsurvey.c
+++ /dev/null
@@ -1,379 +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 "core/nng_impl.h"
-#include "nng/protocol/survey0/survey.h"
-
-// Surveyor protocol. The SURVEYOR protocol is the "survey" side of the
-// survey pattern. This is useful for building service discovery, voting, etc.
-
-typedef struct xsurv0_pipe xsurv0_pipe;
-typedef struct xsurv0_sock xsurv0_sock;
-
-static void xsurv0_sock_getq_cb(void *);
-static void xsurv0_getq_cb(void *);
-static void xsurv0_putq_cb(void *);
-static void xsurv0_send_cb(void *);
-static void xsurv0_recv_cb(void *);
-
-// surv0_sock is our per-socket protocol private structure.
-struct xsurv0_sock {
- nni_list pipes;
- nni_aio aio_getq;
- nni_msgq * uwq;
- nni_msgq * urq;
- nni_mtx mtx;
- nni_atomic_int ttl;
-};
-
-// surv0_pipe is our per-pipe protocol private structure.
-struct xsurv0_pipe {
- nni_pipe * npipe;
- xsurv0_sock * psock;
- nni_msgq * sendq;
- nni_list_node node;
- nni_aio aio_getq;
- nni_aio aio_putq;
- nni_aio aio_send;
- nni_aio aio_recv;
-};
-
-static void
-xsurv0_sock_fini(void *arg)
-{
- xsurv0_sock *s = arg;
-
- nni_aio_fini(&s->aio_getq);
- nni_mtx_fini(&s->mtx);
-}
-
-static int
-xsurv0_sock_init(void *arg, nni_sock *nsock)
-{
- xsurv0_sock *s = arg;
-
- nni_aio_init(&s->aio_getq, xsurv0_sock_getq_cb, s);
- NNI_LIST_INIT(&s->pipes, xsurv0_pipe, node);
- nni_mtx_init(&s->mtx);
-
- s->uwq = nni_sock_sendq(nsock);
- s->urq = nni_sock_recvq(nsock);
- nni_atomic_init(&s->ttl);
- nni_atomic_set(&s->ttl, 8);
-
- return (0);
-}
-
-static void
-xsurv0_sock_open(void *arg)
-{
- xsurv0_sock *s = arg;
-
- nni_msgq_aio_get(s->uwq, &s->aio_getq);
-}
-
-static void
-xsurv0_sock_close(void *arg)
-{
- xsurv0_sock *s = arg;
-
- nni_aio_close(&s->aio_getq);
-}
-
-static void
-xsurv0_pipe_stop(void *arg)
-{
- xsurv0_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
-xsurv0_pipe_fini(void *arg)
-{
- xsurv0_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
-xsurv0_pipe_init(void *arg, nni_pipe *npipe, void *s)
-{
- xsurv0_pipe *p = arg;
- int rv;
-
- nni_aio_init(&p->aio_getq, xsurv0_getq_cb, p);
- nni_aio_init(&p->aio_putq, xsurv0_putq_cb, p);
- nni_aio_init(&p->aio_send, xsurv0_send_cb, p);
- nni_aio_init(&p->aio_recv, xsurv0_recv_cb, p);
-
- // This depth could be tunable. The queue exists so that if we
- // have multiple requests coming in faster than we can deliver them,
- // we try to avoid dropping them. We don't really have a solution
- // for applying back pressure. It would be nice if surveys carried
- // an expiration with them, so that we could discard any that are
- // not delivered before their expiration date.
- if ((rv = nni_msgq_init(&p->sendq, 16)) != 0) {
- xsurv0_pipe_fini(p);
- return (rv);
- }
-
- p->npipe = npipe;
- p->psock = s;
- return (0);
-}
-
-static int
-xsurv0_pipe_start(void *arg)
-{
- xsurv0_pipe *p = arg;
- xsurv0_sock *s = p->psock;
-
- if (nni_pipe_peer(p->npipe) != NNG_SURVEYOR0_PEER) {
- return (NNG_EPROTO);
- }
-
- nni_mtx_lock(&s->mtx);
- nni_list_append(&s->pipes, p);
- nni_mtx_unlock(&s->mtx);
-
- nni_msgq_aio_get(p->sendq, &p->aio_getq);
- nni_pipe_recv(p->npipe, &p->aio_recv);
- return (0);
-}
-
-static void
-xsurv0_pipe_close(void *arg)
-{
- xsurv0_pipe *p = arg;
- xsurv0_sock *s = p->psock;
-
- 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->mtx);
- if (nni_list_active(&s->pipes, p)) {
- nni_list_remove(&s->pipes, p);
- }
- nni_mtx_unlock(&s->mtx);
-}
-
-static void
-xsurv0_getq_cb(void *arg)
-{
- xsurv0_pipe *p = arg;
-
- if (nni_aio_result(&p->aio_getq) != 0) {
- nni_pipe_close(p->npipe);
- 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->npipe, &p->aio_send);
-}
-
-static void
-xsurv0_send_cb(void *arg)
-{
- xsurv0_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->npipe);
- return;
- }
-
- nni_msgq_aio_get(p->sendq, &p->aio_getq);
-}
-
-static void
-xsurv0_putq_cb(void *arg)
-{
- xsurv0_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->npipe);
- return;
- }
-
- nni_pipe_recv(p->npipe, &p->aio_recv);
-}
-
-static void
-xsurv0_recv_cb(void *arg)
-{
- xsurv0_pipe *p = arg;
- nni_msg * msg;
- bool end;
-
- if (nni_aio_result(&p->aio_recv) != 0) {
- nni_pipe_close(p->npipe);
- 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->npipe));
- end = false;
-
- while (!end) {
- uint8_t *body;
-
- if (nni_msg_len(msg) < 4) {
- // Peer gave us garbage, so kick it.
- nni_msg_free(msg);
- nni_pipe_close(p->npipe);
- return;
- }
- body = nni_msg_body(msg);
- end = ((body[0] & 0x80u) != 0);
-
- if (nni_msg_header_append(msg, body, sizeof(uint32_t)) != 0) {
- // TODO: bump a no-memory stat
- nni_msg_free(msg);
- // Closing the pipe may release some memory.
- // It at least gives an indication to the peer
- // that we've lost the message.
- nni_pipe_close(p->npipe);
- return;
- }
- nni_msg_trim(msg, sizeof(uint32_t));
- }
-
- nni_aio_set_msg(&p->aio_putq, msg);
- nni_msgq_aio_put(p->psock->urq, &p->aio_putq);
-}
-
-static int
-xsurv0_sock_set_max_ttl(void *arg, const void *buf, size_t sz, nni_opt_type t)
-{
- xsurv0_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
-xsurv0_sock_get_max_ttl(void *arg, void *buf, size_t *szp, nni_opt_type t)
-{
- xsurv0_sock *s = arg;
- return (nni_copyout_int(nni_atomic_get(&s->ttl), buf, szp, t));
-}
-
-static void
-xsurv0_sock_getq_cb(void *arg)
-{
- xsurv0_sock *s = arg;
- xsurv0_pipe *p;
- nni_msg * msg;
-
- if (nni_aio_result(&s->aio_getq) != 0) {
- // Should be NNG_ECLOSED.
- return;
- }
- msg = nni_aio_get_msg(&s->aio_getq);
- nni_aio_set_msg(&s->aio_getq, NULL);
-
- nni_mtx_lock(&s->mtx);
- NNI_LIST_FOREACH (&s->pipes, p) {
- nni_msg_clone(msg);
- if (nni_msgq_tryput(p->sendq, msg) != 0) {
- nni_msg_free(msg);
- }
- }
-
- nni_msgq_aio_get(s->uwq, &s->aio_getq);
- nni_mtx_unlock(&s->mtx);
-
- // If there were no pipes to send on, just toss the message.
- nni_msg_free(msg);
-}
-
-static void
-xsurv0_sock_recv(void *arg, nni_aio *aio)
-{
- xsurv0_sock *s = arg;
-
- nni_msgq_aio_get(s->urq, aio);
-}
-
-static void
-xsurv0_sock_send(void *arg, nni_aio *aio)
-{
- xsurv0_sock *s = arg;
-
- nni_msgq_aio_put(s->uwq, aio);
-}
-
-static nni_proto_pipe_ops xsurv0_pipe_ops = {
- .pipe_size = sizeof(xsurv0_pipe),
- .pipe_init = xsurv0_pipe_init,
- .pipe_fini = xsurv0_pipe_fini,
- .pipe_start = xsurv0_pipe_start,
- .pipe_close = xsurv0_pipe_close,
- .pipe_stop = xsurv0_pipe_stop,
-};
-
-static nni_option xsurv0_sock_options[] = {
- {
- .o_name = NNG_OPT_MAXTTL,
- .o_get = xsurv0_sock_get_max_ttl,
- .o_set = xsurv0_sock_set_max_ttl,
- },
- // terminate list
- {
- .o_name = NULL,
- },
-};
-
-static nni_proto_sock_ops xsurv0_sock_ops = {
- .sock_size = sizeof(xsurv0_sock),
- .sock_init = xsurv0_sock_init,
- .sock_fini = xsurv0_sock_fini,
- .sock_open = xsurv0_sock_open,
- .sock_close = xsurv0_sock_close,
- .sock_send = xsurv0_sock_send,
- .sock_recv = xsurv0_sock_recv,
- .sock_options = xsurv0_sock_options,
-};
-
-static nni_proto xsurv0_proto = {
- .proto_version = NNI_PROTOCOL_VERSION,
- .proto_self = { NNG_SURVEYOR0_SELF, NNG_SURVEYOR0_SELF_NAME },
- .proto_peer = { NNG_SURVEYOR0_PEER, NNG_SURVEYOR0_PEER_NAME },
- .proto_flags = NNI_PROTO_FLAG_SNDRCV | NNI_PROTO_FLAG_RAW,
- .proto_sock_ops = &xsurv0_sock_ops,
- .proto_pipe_ops = &xsurv0_pipe_ops,
-};
-
-int
-nng_surveyor0_open_raw(nng_socket *sidp)
-{
- return (nni_proto_open(sidp, &xsurv0_proto));
-}
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