aboutsummaryrefslogtreecommitdiff
path: root/src/protocol/pair0
diff options
context:
space:
mode:
Diffstat (limited to 'src/protocol/pair0')
-rw-r--r--src/protocol/pair0/CMakeLists.txt18
-rw-r--r--src/protocol/pair0/pair.c305
-rw-r--r--src/protocol/pair0/pair.h28
3 files changed, 351 insertions, 0 deletions
diff --git a/src/protocol/pair0/CMakeLists.txt b/src/protocol/pair0/CMakeLists.txt
new file mode 100644
index 00000000..68e7ad34
--- /dev/null
+++ b/src/protocol/pair0/CMakeLists.txt
@@ -0,0 +1,18 @@
+#
+# 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.
+#
+
+# PAIRv0 protocol
+
+if (NNG_PROTO_PAIR0)
+ set(PAIR0_SOURCES protocol/pair0/pair.c protocol/pair0/pair.h)
+ install(FILES pair.h DESTINATION include/nng/protocol/pair0)
+endif()
+
+set(NNG_SOURCES ${NNG_SOURCES} ${PAIR0_SOURCES} PARENT_SCOPE)
diff --git a/src/protocol/pair0/pair.c b/src/protocol/pair0/pair.c
new file mode 100644
index 00000000..bac405b8
--- /dev/null
+++ b/src/protocol/pair0/pair.c
@@ -0,0 +1,305 @@
+//
+// 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"
+
+// Pair protocol. The PAIR protocol is a simple 1:1 messaging pattern.
+// While a peer is connected to the server, all other peer connection
+// attempts are discarded.
+
+#ifndef NNI_PROTO_PAIR_V0
+#define NNI_PROTO_PAIR_V0 NNI_PROTO(1, 0)
+#endif
+
+typedef struct pair0_pipe pair0_pipe;
+typedef struct pair0_sock pair0_sock;
+
+static void pair0_send_cb(void *);
+static void pair0_recv_cb(void *);
+static void pair0_getq_cb(void *);
+static void pair0_putq_cb(void *);
+static void pair0_pipe_fini(void *);
+
+// pair0_sock is our per-socket protocol private structure.
+struct pair0_sock {
+ pair0_pipe *ppipe;
+ nni_msgq * uwq;
+ nni_msgq * urq;
+ int raw;
+ nni_mtx mtx;
+};
+
+// An pair0_pipe is our per-pipe protocol private structure. We keep
+// one of these even though in theory we'd only have a single underlying
+// pipe. The separate data structure is more like other protocols that do
+// manage multiple pipes.
+struct pair0_pipe {
+ nni_pipe * npipe;
+ pair0_sock *psock;
+ nni_aio * aio_send;
+ nni_aio * aio_recv;
+ nni_aio * aio_getq;
+ nni_aio * aio_putq;
+};
+
+static int
+pair0_sock_init(void **sp, nni_sock *nsock)
+{
+ pair0_sock *s;
+
+ if ((s = NNI_ALLOC_STRUCT(s)) == NULL) {
+ return (NNG_ENOMEM);
+ }
+ nni_mtx_init(&s->mtx);
+ s->ppipe = NULL;
+ s->raw = 0;
+ s->uwq = nni_sock_sendq(nsock);
+ s->urq = nni_sock_recvq(nsock);
+ *sp = s;
+ return (0);
+}
+
+static void
+pair0_sock_fini(void *arg)
+{
+ pair0_sock *s = arg;
+
+ nni_mtx_fini(&s->mtx);
+ NNI_FREE_STRUCT(s);
+}
+
+static void
+pair0_pipe_fini(void *arg)
+{
+ pair0_pipe *p = arg;
+
+ nni_aio_fini(p->aio_send);
+ nni_aio_fini(p->aio_recv);
+ nni_aio_fini(p->aio_putq);
+ nni_aio_fini(p->aio_getq);
+ NNI_FREE_STRUCT(p);
+}
+
+static int
+pair0_pipe_init(void **pp, nni_pipe *npipe, void *psock)
+{
+ pair0_pipe *p;
+ int rv;
+
+ if ((p = NNI_ALLOC_STRUCT(p)) == NULL) {
+ return (NNG_ENOMEM);
+ }
+ if (((rv = nni_aio_init(&p->aio_send, pair0_send_cb, p)) != 0) ||
+ ((rv = nni_aio_init(&p->aio_recv, pair0_recv_cb, p)) != 0) ||
+ ((rv = nni_aio_init(&p->aio_getq, pair0_getq_cb, p)) != 0) ||
+ ((rv = nni_aio_init(&p->aio_putq, pair0_putq_cb, p)) != 0)) {
+ pair0_pipe_fini(p);
+ return (rv);
+ }
+
+ p->npipe = npipe;
+ p->psock = psock;
+ *pp = p;
+ return (0);
+}
+
+static int
+pair0_pipe_start(void *arg)
+{
+ pair0_pipe *p = arg;
+ pair0_sock *s = p->psock;
+
+ nni_mtx_lock(&s->mtx);
+ if (s->ppipe != NULL) {
+ nni_mtx_unlock(&s->mtx);
+ return (NNG_EBUSY); // Already have a peer, denied.
+ }
+ s->ppipe = p;
+ nni_mtx_unlock(&s->mtx);
+
+ // Schedule a getq on the upper, and a read from the pipe.
+ // Each of these also sets up another hold on the pipe itself.
+ nni_msgq_aio_get(s->uwq, p->aio_getq);
+ nni_pipe_recv(p->npipe, p->aio_recv);
+
+ return (0);
+}
+
+static void
+pair0_pipe_stop(void *arg)
+{
+ pair0_pipe *p = arg;
+ pair0_sock *s = p->psock;
+
+ nni_aio_stop(p->aio_send);
+ nni_aio_stop(p->aio_recv);
+ nni_aio_stop(p->aio_putq);
+ nni_aio_stop(p->aio_getq);
+
+ nni_mtx_lock(&s->mtx);
+ if (s->ppipe == p) {
+ s->ppipe = NULL;
+ }
+ nni_mtx_unlock(&s->mtx);
+}
+
+static void
+pair0_recv_cb(void *arg)
+{
+ pair0_pipe *p = arg;
+ pair0_sock *s = p->psock;
+ nni_msg * msg;
+
+ if (nni_aio_result(p->aio_recv) != 0) {
+ nni_pipe_stop(p->npipe);
+ return;
+ }
+
+ msg = nni_aio_get_msg(p->aio_recv);
+ nni_aio_set_msg(p->aio_putq, msg);
+ nni_aio_set_msg(p->aio_recv, NULL);
+
+ nni_msg_set_pipe(msg, nni_pipe_id(p->npipe));
+ nni_msgq_aio_put(s->urq, p->aio_putq);
+}
+
+static void
+pair0_putq_cb(void *arg)
+{
+ pair0_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_stop(p->npipe);
+ return;
+ }
+ nni_pipe_recv(p->npipe, p->aio_recv);
+}
+
+static void
+pair0_getq_cb(void *arg)
+{
+ pair0_pipe *p = arg;
+ pair0_sock *s = p->psock;
+
+ if (nni_aio_result(p->aio_getq) != 0) {
+ nni_pipe_stop(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
+pair0_send_cb(void *arg)
+{
+ pair0_pipe *p = arg;
+ pair0_sock *s = p->psock;
+
+ 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->npipe);
+ return;
+ }
+
+ nni_msgq_aio_get(s->uwq, p->aio_getq);
+}
+
+static void
+pair0_sock_open(void *arg)
+{
+ NNI_ARG_UNUSED(arg);
+}
+
+static void
+pair0_sock_close(void *arg)
+{
+ NNI_ARG_UNUSED(arg);
+}
+
+static int
+pair0_sock_setopt_raw(void *arg, const void *buf, size_t sz)
+{
+ pair0_sock *s = arg;
+ return (nni_setopt_int(&s->raw, buf, sz, 0, 1));
+}
+
+static int
+pair0_sock_getopt_raw(void *arg, void *buf, size_t *szp)
+{
+ pair0_sock *s = arg;
+ return (nni_getopt_int(s->raw, buf, szp));
+}
+
+static void
+pair0_sock_send(void *arg, nni_aio *aio)
+{
+ pair0_sock *s = arg;
+
+ nni_msgq_aio_put(s->uwq, aio);
+}
+
+static void
+pair0_sock_recv(void *arg, nni_aio *aio)
+{
+ pair0_sock *s = arg;
+
+ nni_msgq_aio_get(s->urq, aio);
+}
+
+static nni_proto_pipe_ops pair0_pipe_ops = {
+ .pipe_init = pair0_pipe_init,
+ .pipe_fini = pair0_pipe_fini,
+ .pipe_start = pair0_pipe_start,
+ .pipe_stop = pair0_pipe_stop,
+};
+
+static nni_proto_sock_option pair0_sock_options[] = {
+ {
+ .pso_name = NNG_OPT_RAW,
+ .pso_getopt = pair0_sock_getopt_raw,
+ .pso_setopt = pair0_sock_setopt_raw,
+ },
+ // terminate list
+ { NULL, NULL, NULL },
+};
+
+static nni_proto_sock_ops pair0_sock_ops = {
+ .sock_init = pair0_sock_init,
+ .sock_fini = pair0_sock_fini,
+ .sock_open = pair0_sock_open,
+ .sock_close = pair0_sock_close,
+ .sock_send = pair0_sock_send,
+ .sock_recv = pair0_sock_recv,
+ .sock_options = pair0_sock_options,
+};
+
+// Legacy protocol (v0)
+static nni_proto pair0_proto = {
+ .proto_version = NNI_PROTOCOL_VERSION,
+ .proto_self = { NNI_PROTO_PAIR_V0, "pair" },
+ .proto_peer = { NNI_PROTO_PAIR_V0, "pair" },
+ .proto_flags = NNI_PROTO_FLAG_SNDRCV,
+ .proto_sock_ops = &pair0_sock_ops,
+ .proto_pipe_ops = &pair0_pipe_ops,
+};
+
+int
+nng_pair0_open(nng_socket *sidp)
+{
+ return (nni_proto_open(sidp, &pair0_proto));
+}
diff --git a/src/protocol/pair0/pair.h b/src/protocol/pair0/pair.h
new file mode 100644
index 00000000..6828c921
--- /dev/null
+++ b/src/protocol/pair0/pair.h
@@ -0,0 +1,28 @@
+//
+// 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.
+//
+
+#ifndef NNG_PROTOCOL_PAIR0_PAIR_H
+#define NNG_PROTOCOL_PAIR0_PAIR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+NNG_DECL int nng_pair0_open(nng_socket *);
+
+#ifndef nng_pair_open
+#define nng_pair_open nng_pair0_open
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NNG_PROTOCOL_PAIR0_PAIR_H
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2026-01-18 19:25:10 +0000