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-rw-r--r--src/protocol/pubsub0/pub.c344
1 files changed, 344 insertions, 0 deletions
diff --git a/src/protocol/pubsub0/pub.c b/src/protocol/pubsub0/pub.c
new file mode 100644
index 00000000..f4a33b77
--- /dev/null
+++ b/src/protocol/pubsub0/pub.c
@@ -0,0 +1,344 @@
+//
+// Copyright 2017 Garrett D'Amore <garrett@damore.org>
+// Copyright 2017 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 <stdlib.h>
+#include <string.h>
+
+#include "core/nng_impl.h"
+#include "protocol/pubsub0/pub.h"
+
+// Publish protocol. The PUB protocol simply sends messages out, as
+// a broadcast. It has nothing more sophisticated because it does not
+// perform sender-side filtering. Its best effort delivery, so anything
+// that can't receive the message won't get one.
+
+#ifndef NNI_PROTO_SUB_V0
+#define NNI_PROTO_SUB_V0 NNI_PROTO(2, 1)
+#endif
+
+#ifndef NNI_PROTO_PUB_V0
+#define NNI_PROTO_PUB_V0 NNI_PROTO(2, 0)
+#endif
+
+typedef struct pub0_pipe pub0_pipe;
+typedef struct pub0_sock pub0_sock;
+
+static void pub0_pipe_recv_cb(void *);
+static void pub0_pipe_send_cb(void *);
+static void pub0_pipe_getq_cb(void *);
+static void pub0_sock_getq_cb(void *);
+static void pub0_sock_fini(void *);
+static void pub0_pipe_fini(void *);
+
+// pub0_sock is our per-socket protocol private structure.
+struct pub0_sock {
+ nni_msgq *uwq;
+ int raw;
+ nni_aio * aio_getq;
+ nni_list pipes;
+ nni_mtx mtx;
+};
+
+// pub0_pipe is our per-pipe protocol private structure.
+struct pub0_pipe {
+ nni_pipe * pipe;
+ pub0_sock * pub;
+ nni_msgq * sendq;
+ nni_aio * aio_getq;
+ nni_aio * aio_send;
+ nni_aio * aio_recv;
+ nni_list_node node;
+};
+
+static void
+pub0_sock_fini(void *arg)
+{
+ pub0_sock *s = arg;
+
+ nni_aio_stop(s->aio_getq);
+ nni_aio_fini(s->aio_getq);
+ nni_mtx_fini(&s->mtx);
+ NNI_FREE_STRUCT(s);
+}
+
+static int
+pub0_sock_init(void **sp, nni_sock *sock)
+{
+ pub0_sock *s;
+ int rv;
+
+ if ((s = NNI_ALLOC_STRUCT(s)) == NULL) {
+ return (NNG_ENOMEM);
+ }
+ nni_mtx_init(&s->mtx);
+ if ((rv = nni_aio_init(&s->aio_getq, pub0_sock_getq_cb, s)) != 0) {
+ pub0_sock_fini(s);
+ return (rv);
+ }
+
+ s->raw = 0;
+ NNI_LIST_INIT(&s->pipes, pub0_pipe, node);
+
+ s->uwq = nni_sock_sendq(sock);
+
+ *sp = s;
+ return (0);
+}
+
+static void
+pub0_sock_open(void *arg)
+{
+ pub0_sock *s = arg;
+
+ nni_msgq_aio_get(s->uwq, s->aio_getq);
+}
+
+static void
+pub0_sock_close(void *arg)
+{
+ pub0_sock *s = arg;
+
+ nni_aio_cancel(s->aio_getq, NNG_ECLOSED);
+}
+
+static void
+pub0_pipe_fini(void *arg)
+{
+ pub0_pipe *p = arg;
+ nni_aio_fini(p->aio_getq);
+ nni_aio_fini(p->aio_send);
+ nni_aio_fini(p->aio_recv);
+ nni_msgq_fini(p->sendq);
+ NNI_FREE_STRUCT(p);
+}
+
+static int
+pub0_pipe_init(void **pp, nni_pipe *pipe, void *s)
+{
+ pub0_pipe *p;
+ int rv;
+
+ if ((p = NNI_ALLOC_STRUCT(p)) == NULL) {
+ return (NNG_ENOMEM);
+ }
+
+ // XXX: consider making this depth tunable
+ if (((rv = nni_msgq_init(&p->sendq, 16)) != 0) ||
+ ((rv = nni_aio_init(&p->aio_getq, pub0_pipe_getq_cb, p)) != 0) ||
+ ((rv = nni_aio_init(&p->aio_send, pub0_pipe_send_cb, p)) != 0) ||
+ ((rv = nni_aio_init(&p->aio_recv, pub0_pipe_recv_cb, p)) != 0)) {
+
+ pub0_pipe_fini(p);
+ return (rv);
+ }
+
+ p->pipe = pipe;
+ p->pub = s;
+ *pp = p;
+ return (0);
+}
+
+static int
+pub0_pipe_start(void *arg)
+{
+ pub0_pipe *p = arg;
+ pub0_sock *s = p->pub;
+
+ if (nni_pipe_peer(p->pipe) != NNI_PROTO_SUB_V0) {
+ return (NNG_EPROTO);
+ }
+ nni_mtx_lock(&s->mtx);
+ nni_list_append(&s->pipes, p);
+ nni_mtx_unlock(&s->mtx);
+
+ // Start the receiver and the queue reader.
+ nni_pipe_recv(p->pipe, p->aio_recv);
+ nni_msgq_aio_get(p->sendq, p->aio_getq);
+
+ return (0);
+}
+
+static void
+pub0_pipe_stop(void *arg)
+{
+ pub0_pipe *p = arg;
+ pub0_sock *s = p->pub;
+
+ nni_aio_stop(p->aio_getq);
+ nni_aio_stop(p->aio_send);
+ nni_aio_stop(p->aio_recv);
+
+ 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
+pub0_sock_getq_cb(void *arg)
+{
+ pub0_sock *s = arg;
+ nni_msgq * uwq = s->uwq;
+ nni_msg * msg, *dup;
+
+ pub0_pipe *p;
+ pub0_pipe *last;
+ int rv;
+
+ if (nni_aio_result(s->aio_getq) != 0) {
+ return;
+ }
+
+ msg = nni_aio_get_msg(s->aio_getq);
+ nni_aio_set_msg(s->aio_getq, NULL);
+
+ nni_mtx_lock(&s->mtx);
+ last = nni_list_last(&s->pipes);
+ NNI_LIST_FOREACH (&s->pipes, p) {
+ if (p != last) {
+ rv = nni_msg_dup(&dup, msg);
+ if (rv != 0) {
+ continue;
+ }
+ } else {
+ dup = msg;
+ }
+ if ((rv = nni_msgq_tryput(p->sendq, dup)) != 0) {
+ nni_msg_free(dup);
+ }
+ }
+ nni_mtx_unlock(&s->mtx);
+
+ if (last == NULL) {
+ nni_msg_free(msg);
+ }
+
+ nni_msgq_aio_get(uwq, s->aio_getq);
+}
+
+static void
+pub0_pipe_recv_cb(void *arg)
+{
+ pub0_pipe *p = arg;
+
+ if (nni_aio_result(p->aio_recv) != 0) {
+ nni_pipe_stop(p->pipe);
+ return;
+ }
+
+ nni_msg_free(nni_aio_get_msg(p->aio_recv));
+ nni_aio_set_msg(p->aio_recv, NULL);
+ nni_pipe_recv(p->pipe, p->aio_recv);
+}
+
+static void
+pub0_pipe_getq_cb(void *arg)
+{
+ pub0_pipe *p = arg;
+
+ if (nni_aio_result(p->aio_getq) != 0) {
+ nni_pipe_stop(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
+pub0_pipe_send_cb(void *arg)
+{
+ pub0_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_stop(p->pipe);
+ return;
+ }
+
+ nni_aio_set_msg(p->aio_send, NULL);
+ nni_msgq_aio_get(p->sendq, p->aio_getq);
+}
+
+static int
+pub0_sock_setopt_raw(void *arg, const void *buf, size_t sz)
+{
+ pub0_sock *s = arg;
+ return (nni_setopt_int(&s->raw, buf, sz, 0, 1));
+}
+
+static int
+pub0_sock_getopt_raw(void *arg, void *buf, size_t *szp)
+{
+ pub0_sock *s = arg;
+ return (nni_getopt_int(s->raw, buf, szp));
+}
+
+static void
+pub0_sock_recv(void *arg, nni_aio *aio)
+{
+ nni_aio_finish_error(aio, NNG_ENOTSUP);
+}
+
+static void
+pub0_sock_send(void *arg, nni_aio *aio)
+{
+ pub0_sock *s = arg;
+
+ nni_msgq_aio_put(s->uwq, aio);
+}
+
+static nni_proto_pipe_ops pub0_pipe_ops = {
+ .pipe_init = pub0_pipe_init,
+ .pipe_fini = pub0_pipe_fini,
+ .pipe_start = pub0_pipe_start,
+ .pipe_stop = pub0_pipe_stop,
+};
+
+static nni_proto_sock_option pub0_sock_options[] = {
+ {
+ .pso_name = NNG_OPT_RAW,
+ .pso_getopt = pub0_sock_getopt_raw,
+ .pso_setopt = pub0_sock_setopt_raw,
+ },
+ // terminate list
+ { NULL, NULL, NULL },
+};
+
+static nni_proto_sock_ops pub0_sock_ops = {
+ .sock_init = pub0_sock_init,
+ .sock_fini = pub0_sock_fini,
+ .sock_open = pub0_sock_open,
+ .sock_close = pub0_sock_close,
+ .sock_send = pub0_sock_send,
+ .sock_recv = pub0_sock_recv,
+ .sock_options = pub0_sock_options,
+};
+
+static nni_proto pub0_proto = {
+ .proto_version = NNI_PROTOCOL_VERSION,
+ .proto_self = { NNI_PROTO_PUB_V0, "pub" },
+ .proto_peer = { NNI_PROTO_SUB_V0, "sub" },
+ .proto_flags = NNI_PROTO_FLAG_SND,
+ .proto_sock_ops = &pub0_sock_ops,
+ .proto_pipe_ops = &pub0_pipe_ops,
+};
+
+int
+nng_pub0_open(nng_socket *sidp)
+{
+ return (nni_proto_open(sidp, &pub0_proto));
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2026-01-18 13:55:54 +0000