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-rw-r--r--src/protocol/pubsub/sub.c398
1 files changed, 0 insertions, 398 deletions
diff --git a/src/protocol/pubsub/sub.c b/src/protocol/pubsub/sub.c
deleted file mode 100644
index 555d528e..00000000
--- a/src/protocol/pubsub/sub.c
+++ /dev/null
@@ -1,398 +0,0 @@
-//
-// 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"
-
-const char *nng_opt_sub_subscribe = NNG_OPT_SUB_SUBSCRIBE;
-const char *nng_opt_sub_unsubscribe = NNG_OPT_SUB_UNSUBSCRIBE;
-
-// Subscriber protocol. The SUB protocol receives messages sent to
-// it from publishers, and filters out those it is not interested in,
-// only passing up ones that match known subscriptions.
-
-typedef struct sub_pipe sub_pipe;
-typedef struct sub_sock sub_sock;
-typedef struct sub_topic sub_topic;
-
-static void sub_recv_cb(void *);
-static void sub_putq_cb(void *);
-static void sub_pipe_fini(void *);
-
-struct sub_topic {
- nni_list_node node;
- size_t len;
- void * buf;
-};
-
-// An nni_rep_sock is our per-socket protocol private structure.
-struct sub_sock {
- nni_list topics;
- nni_msgq *urq;
- int raw;
- nni_mtx lk;
-};
-
-// An nni_rep_pipe is our per-pipe protocol private structure.
-struct sub_pipe {
- nni_pipe *pipe;
- sub_sock *sub;
- nni_aio * aio_recv;
- nni_aio * aio_putq;
-};
-
-static int
-sub_sock_init(void **sp, nni_sock *sock)
-{
- sub_sock *s;
-
- if ((s = NNI_ALLOC_STRUCT(s)) == NULL) {
- return (NNG_ENOMEM);
- }
- nni_mtx_init(&s->lk);
- NNI_LIST_INIT(&s->topics, sub_topic, node);
- s->raw = 0;
-
- s->urq = nni_sock_recvq(sock);
- *sp = s;
- return (0);
-}
-
-static void
-sub_sock_fini(void *arg)
-{
- sub_sock * s = arg;
- sub_topic *topic;
-
- while ((topic = nni_list_first(&s->topics)) != NULL) {
- nni_list_remove(&s->topics, topic);
- nni_free(topic->buf, topic->len);
- NNI_FREE_STRUCT(topic);
- }
- nni_mtx_fini(&s->lk);
- NNI_FREE_STRUCT(s);
-}
-
-static void
-sub_sock_open(void *arg)
-{
- NNI_ARG_UNUSED(arg);
-}
-
-static void
-sub_sock_close(void *arg)
-{
- NNI_ARG_UNUSED(arg);
-}
-
-static void
-sub_pipe_fini(void *arg)
-{
- sub_pipe *p = arg;
-
- nni_aio_fini(p->aio_putq);
- nni_aio_fini(p->aio_recv);
- NNI_FREE_STRUCT(p);
-}
-
-static int
-sub_pipe_init(void **pp, nni_pipe *pipe, void *s)
-{
- sub_pipe *p;
- int rv;
-
- if ((p = NNI_ALLOC_STRUCT(p)) == NULL) {
- return (NNG_ENOMEM);
- }
- if (((rv = nni_aio_init(&p->aio_putq, sub_putq_cb, p)) != 0) ||
- ((rv = nni_aio_init(&p->aio_recv, sub_recv_cb, p)) != 0)) {
- sub_pipe_fini(p);
- return (rv);
- }
-
- p->pipe = pipe;
- p->sub = s;
- *pp = p;
- return (0);
-}
-
-static int
-sub_pipe_start(void *arg)
-{
- sub_pipe *p = arg;
-
- nni_pipe_recv(p->pipe, p->aio_recv);
- return (0);
-}
-
-static void
-sub_pipe_stop(void *arg)
-{
- sub_pipe *p = arg;
-
- nni_aio_stop(p->aio_putq);
- nni_aio_stop(p->aio_recv);
-}
-
-static void
-sub_recv_cb(void *arg)
-{
- sub_pipe *p = arg;
- sub_sock *s = p->sub;
- nni_msgq *urq = s->urq;
- nni_msg * msg;
-
- if (nni_aio_result(p->aio_recv) != 0) {
- nni_pipe_stop(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));
- nni_aio_set_msg(p->aio_putq, msg);
- nni_msgq_aio_put(urq, p->aio_putq);
-}
-
-static void
-sub_putq_cb(void *arg)
-{
- sub_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->pipe);
- return;
- }
-
- nni_pipe_recv(p->pipe, p->aio_recv);
-}
-
-// For now we maintain subscriptions on a sorted linked list. As we do not
-// expect to have huge numbers of subscriptions, and as the operation is
-// really O(n), we think this is acceptable. In the future we might decide
-// to replace this with a patricia trie, like old nanomsg had.
-
-static int
-sub_subscribe(void *arg, const void *buf, size_t sz)
-{
- sub_sock * s = arg;
- sub_topic *topic;
- sub_topic *newtopic;
-
- nni_mtx_lock(&s->lk);
- NNI_LIST_FOREACH (&s->topics, topic) {
- int rv;
-
- if (topic->len >= sz) {
- rv = memcmp(topic->buf, buf, sz);
- } else {
- rv = memcmp(topic->buf, buf, topic->len);
- }
- if (rv == 0) {
- if (topic->len == sz) {
- // Already inserted.
- nni_mtx_unlock(&s->lk);
- return (0);
- }
- if (topic->len > sz) {
- break;
- }
- } else if (rv > 0) {
- break;
- }
- }
-
- if ((newtopic = NNI_ALLOC_STRUCT(newtopic)) == NULL) {
- nni_mtx_unlock(&s->lk);
- return (NNG_ENOMEM);
- }
- if ((newtopic->buf = nni_alloc(sz)) == NULL) {
- nni_mtx_unlock(&s->lk);
- return (NNG_ENOMEM);
- }
- NNI_LIST_NODE_INIT(&newtopic->node);
- newtopic->len = sz;
- memcpy(newtopic->buf, buf, sz);
- if (topic != NULL) {
- nni_list_insert_before(&s->topics, newtopic, topic);
- } else {
- nni_list_append(&s->topics, newtopic);
- }
- nni_mtx_unlock(&s->lk);
- return (0);
-}
-
-static int
-sub_unsubscribe(void *arg, const void *buf, size_t sz)
-{
- sub_sock * s = arg;
- sub_topic *topic;
- int rv;
-
- nni_mtx_lock(&s->lk);
- NNI_LIST_FOREACH (&s->topics, topic) {
- if (topic->len >= sz) {
- rv = memcmp(topic->buf, buf, sz);
- } else {
- rv = memcmp(topic->buf, buf, topic->len);
- }
- if (rv == 0) {
- if (topic->len == sz) {
- nni_list_remove(&s->topics, topic);
- nni_mtx_unlock(&s->lk);
- nni_free(topic->buf, topic->len);
- NNI_FREE_STRUCT(topic);
- return (0);
- }
- if (topic->len > sz) {
- nni_mtx_unlock(&s->lk);
- return (NNG_ENOENT);
- }
- }
- if (rv > 0) {
- nni_mtx_unlock(&s->lk);
- return (NNG_ENOENT);
- }
- }
- nni_mtx_unlock(&s->lk);
- return (NNG_ENOENT);
-}
-
-static int
-sub_sock_setopt_raw(void *arg, const void *buf, size_t sz)
-{
- sub_sock *s = arg;
- return (nni_setopt_int(&s->raw, buf, sz, 0, 1));
-}
-
-static int
-sub_sock_getopt_raw(void *arg, void *buf, size_t *szp)
-{
- sub_sock *s = arg;
- return (nni_getopt_int(s->raw, buf, szp));
-}
-
-static void
-sub_sock_send(void *arg, nni_aio *aio)
-{
- nni_aio_finish_error(aio, NNG_ENOTSUP);
-}
-
-static void
-sub_sock_recv(void *arg, nni_aio *aio)
-{
- sub_sock *s = arg;
-
- nni_msgq_aio_get(s->urq, aio);
-}
-
-static nni_msg *
-sub_sock_filter(void *arg, nni_msg *msg)
-{
- sub_sock * s = arg;
- sub_topic *topic;
- char * body;
- size_t len;
- int match;
-
- nni_mtx_lock(&s->lk);
- if (s->raw) {
- nni_mtx_unlock(&s->lk);
- return (msg);
- }
-
- body = nni_msg_body(msg);
- len = nni_msg_len(msg);
-
- match = 0;
- // Check to see if the message matches one of our subscriptions.
- NNI_LIST_FOREACH (&s->topics, topic) {
- if (len >= topic->len) {
- int rv = memcmp(topic->buf, body, topic->len);
- if (rv == 0) {
- // Matched!
- match = 1;
- break;
- }
- if (rv > 0) {
- match = 0;
- break;
- }
- } else if (memcmp(topic->buf, body, len) >= 0) {
- match = 0;
- break;
- }
- }
- nni_mtx_unlock(&s->lk);
- if (!match) {
- nni_msg_free(msg);
- return (NULL);
- }
- return (msg);
-}
-
-// 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 sub_pipe_ops = {
- .pipe_init = sub_pipe_init,
- .pipe_fini = sub_pipe_fini,
- .pipe_start = sub_pipe_start,
- .pipe_stop = sub_pipe_stop,
-};
-
-static nni_proto_sock_option sub_sock_options[] = {
- {
- .pso_name = NNG_OPT_RAW,
- .pso_getopt = sub_sock_getopt_raw,
- .pso_setopt = sub_sock_setopt_raw,
- },
- {
- .pso_name = NNG_OPT_SUB_SUBSCRIBE,
- .pso_getopt = NULL,
- .pso_setopt = sub_subscribe,
- },
- {
- .pso_name = NNG_OPT_SUB_UNSUBSCRIBE,
- .pso_getopt = NULL,
- .pso_setopt = sub_unsubscribe,
- },
- // terminate list
- { NULL, NULL, NULL },
-};
-
-static nni_proto_sock_ops sub_sock_ops = {
- .sock_init = sub_sock_init,
- .sock_fini = sub_sock_fini,
- .sock_open = sub_sock_open,
- .sock_close = sub_sock_close,
- .sock_send = sub_sock_send,
- .sock_recv = sub_sock_recv,
- .sock_filter = sub_sock_filter,
- .sock_options = sub_sock_options,
-};
-
-static nni_proto sub_proto = {
- .proto_version = NNI_PROTOCOL_VERSION,
- .proto_self = { NNI_PROTO_SUB_V0, "sub" },
- .proto_peer = { NNI_PROTO_PUB_V0, "pub" },
- .proto_flags = NNI_PROTO_FLAG_RCV,
- .proto_sock_ops = &sub_sock_ops,
- .proto_pipe_ops = &sub_pipe_ops,
-};
-
-int
-nng_sub0_open(nng_socket *sidp)
-{
- return (nni_proto_open(sidp, &sub_proto));
-}
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