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Diffstat (limited to 'src/protocol/survey0/xrespond.c')
-rw-r--r--src/protocol/survey0/xrespond.c417
1 files changed, 0 insertions, 417 deletions
diff --git a/src/protocol/survey0/xrespond.c b/src/protocol/survey0/xrespond.c
deleted file mode 100644
index b2f203c3..00000000
--- a/src/protocol/survey0/xrespond.c
+++ /dev/null
@@ -1,417 +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 <stdlib.h>
-
-#include "core/nng_impl.h"
-#include "nng/protocol/survey0/respond.h"
-
-// Respondent protocol. The RESPONDENT protocol is the "replier" side of
-// the surveyor pattern. This is useful for building service discovery, or
-// voting algorithms, for example.
-
-#ifndef NNI_PROTO_SURVEYOR_V0
-#define NNI_PROTO_SURVEYOR_V0 NNI_PROTO(6, 2)
-#endif
-
-#ifndef NNI_PROTO_RESPONDENT_V0
-#define NNI_PROTO_RESPONDENT_V0 NNI_PROTO(6, 3)
-#endif
-
-typedef struct xresp0_pipe xresp0_pipe;
-typedef struct xresp0_sock xresp0_sock;
-
-static void xresp0_recv_cb(void *);
-static void xresp0_putq_cb(void *);
-static void xresp0_getq_cb(void *);
-static void xresp0_send_cb(void *);
-static void xresp0_sock_getq_cb(void *);
-static void xresp0_pipe_fini(void *);
-
-// resp0_sock is our per-socket protocol private structure.
-struct xresp0_sock {
- nni_msgq * urq;
- nni_msgq * uwq;
- nni_atomic_int ttl;
- nni_id_map pipes;
- nni_aio aio_getq;
- nni_mtx mtx;
-};
-
-// resp0_pipe is our per-pipe protocol private structure.
-struct xresp0_pipe {
- nni_pipe * npipe;
- xresp0_sock *psock;
- uint32_t id;
- nni_msgq * sendq;
- nni_aio aio_getq;
- nni_aio aio_putq;
- nni_aio aio_send;
- nni_aio aio_recv;
-};
-
-static void
-xresp0_sock_fini(void *arg)
-{
- xresp0_sock *s = arg;
-
- nni_aio_fini(&s->aio_getq);
- nni_id_map_fini(&s->pipes);
- nni_mtx_fini(&s->mtx);
-}
-
-static int
-xresp0_sock_init(void *arg, nni_sock *nsock)
-{
- xresp0_sock *s = arg;
-
- nni_mtx_init(&s->mtx);
- nni_atomic_init(&s->ttl);
- nni_atomic_set(&s->ttl, 8); // Per RFC
- nni_id_map_init(&s->pipes, 0, 0, false);
- nni_aio_init(&s->aio_getq, xresp0_sock_getq_cb, s);
-
- s->urq = nni_sock_recvq(nsock);
- s->uwq = nni_sock_sendq(nsock);
-
- return (0);
-}
-
-static void
-xresp0_sock_open(void *arg)
-{
- xresp0_sock *s = arg;
-
- nni_msgq_aio_get(s->uwq, &s->aio_getq);
-}
-
-static void
-xresp0_sock_close(void *arg)
-{
- xresp0_sock *s = arg;
-
- nni_aio_close(&s->aio_getq);
-}
-
-static void
-xresp0_pipe_stop(void *arg)
-{
- xresp0_pipe *p = arg;
-
- nni_aio_stop(&p->aio_putq);
- nni_aio_stop(&p->aio_getq);
- nni_aio_stop(&p->aio_send);
- nni_aio_stop(&p->aio_recv);
-}
-
-static void
-xresp0_pipe_fini(void *arg)
-{
- xresp0_pipe *p = arg;
-
- nni_aio_fini(&p->aio_putq);
- nni_aio_fini(&p->aio_getq);
- nni_aio_fini(&p->aio_send);
- nni_aio_fini(&p->aio_recv);
- nni_msgq_fini(p->sendq);
-}
-
-static int
-xresp0_pipe_init(void *arg, nni_pipe *npipe, void *s)
-{
- xresp0_pipe *p = arg;
- int rv;
-
- nni_aio_init(&p->aio_putq, xresp0_putq_cb, p);
- nni_aio_init(&p->aio_recv, xresp0_recv_cb, p);
- nni_aio_init(&p->aio_getq, xresp0_getq_cb, p);
- nni_aio_init(&p->aio_send, xresp0_send_cb, p);
-
- if ((rv = nni_msgq_init(&p->sendq, 2)) != 0) {
- xresp0_pipe_fini(p);
- return (rv);
- }
-
- p->npipe = npipe;
- p->psock = s;
- return (0);
-}
-
-static int
-xresp0_pipe_start(void *arg)
-{
- xresp0_pipe *p = arg;
- xresp0_sock *s = p->psock;
- int rv;
-
- if (nni_pipe_peer(p->npipe) != NNI_PROTO_SURVEYOR_V0) {
- return (NNG_EPROTO);
- }
-
- p->id = nni_pipe_id(p->npipe);
-
- nni_mtx_lock(&s->mtx);
- rv = nni_id_set(&s->pipes, p->id, p);
- nni_mtx_unlock(&s->mtx);
- if (rv != 0) {
- return (rv);
- }
-
- nni_pipe_recv(p->npipe, &p->aio_recv);
- nni_msgq_aio_get(p->sendq, &p->aio_getq);
-
- return (rv);
-}
-
-static void
-xresp0_pipe_close(void *arg)
-{
- xresp0_pipe *p = arg;
- xresp0_sock *s = p->psock;
-
- nni_aio_close(&p->aio_putq);
- nni_aio_close(&p->aio_getq);
- nni_aio_close(&p->aio_send);
- nni_aio_close(&p->aio_recv);
-
- nni_msgq_close(p->sendq);
-
- nni_mtx_lock(&s->mtx);
- nni_id_remove(&s->pipes, p->id);
- nni_mtx_unlock(&s->mtx);
-}
-
-// resp0_sock_send 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.s
-
-void
-xresp0_sock_getq_cb(void *arg)
-{
- xresp0_sock *s = arg;
- nni_msg * msg;
- uint32_t id;
- xresp0_pipe *p;
-
- 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);
-
- // We yank the outgoing pipe id from the header
- if (nni_msg_header_len(msg) < 4) {
- nni_msg_free(msg);
- // We can't really close down the socket, so just keep going.
- nni_msgq_aio_get(s->uwq, &s->aio_getq);
- return;
- }
- id = nni_msg_header_trim_u32(msg);
-
- nni_mtx_lock(&s->mtx);
- // Look for the pipe, and attempt to put the message there
- // (nonblocking) if we can. If we can't for any reason, then we
- // free the message.
- if (((p = nni_id_get(&s->pipes, id)) == NULL) ||
- (nni_msgq_tryput(p->sendq, msg) != 0)) {
- nni_msg_free(msg);
- }
- nni_mtx_unlock(&s->mtx);
- nni_msgq_aio_get(s->uwq, &s->aio_getq);
-}
-
-void
-xresp0_getq_cb(void *arg)
-{
- xresp0_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);
-}
-
-void
-xresp0_send_cb(void *arg)
-{
- xresp0_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
-xresp0_recv_cb(void *arg)
-{
- xresp0_pipe *p = arg;
- xresp0_sock *s = p->psock;
- nni_msgq * urq = s->urq;
- nni_msg * msg;
- int hops;
- int ttl;
-
- if (nni_aio_result(&p->aio_recv) != 0) {
- nni_pipe_close(p->npipe);
- 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, p->id);
-
- // Store the pipe id in the header, first thing.
- nni_msg_header_append_u32(msg, p->id);
-
- // Move backtrace from body to header
- hops = 1;
- for (;;) {
- bool end;
- uint8_t *body;
-
- if (hops > ttl) {
- goto drop;
- }
- hops++;
- if (nni_msg_len(msg) < 4) {
- // Peer sent 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, 4) != 0) {
- goto drop;
- }
- nni_msg_trim(msg, 4);
- if (end) {
- break;
- }
- }
-
- // Now send it up.
- nni_aio_set_msg(&p->aio_putq, msg);
- nni_msgq_aio_put(urq, &p->aio_putq);
- return;
-
-drop:
- nni_msg_free(msg);
- nni_pipe_recv(p->npipe, &p->aio_recv);
-}
-
-static void
-xresp0_putq_cb(void *arg)
-{
- xresp0_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 int
-xresp0_sock_set_maxttl(void *arg, const void *buf, size_t sz, nni_opt_type t)
-{
- xresp0_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
-xresp0_sock_get_maxttl(void *arg, void *buf, size_t *szp, nni_opt_type t)
-{
- xresp0_sock *s = arg;
- return (nni_copyout_int(nni_atomic_get(&s->ttl), buf, szp, t));
-}
-
-static void
-xresp0_sock_send(void *arg, nni_aio *aio)
-{
- xresp0_sock *s = arg;
-
- nni_msgq_aio_put(s->uwq, aio);
-}
-
-static void
-xresp0_sock_recv(void *arg, nni_aio *aio)
-{
- xresp0_sock *s = arg;
-
- nni_msgq_aio_get(s->urq, aio);
-}
-
-static nni_proto_pipe_ops xresp0_pipe_ops = {
- .pipe_size = sizeof(xresp0_pipe),
- .pipe_init = xresp0_pipe_init,
- .pipe_fini = xresp0_pipe_fini,
- .pipe_start = xresp0_pipe_start,
- .pipe_close = xresp0_pipe_close,
- .pipe_stop = xresp0_pipe_stop,
-};
-
-static nni_option xresp0_sock_options[] = {
- {
- .o_name = NNG_OPT_MAXTTL,
- .o_get = xresp0_sock_get_maxttl,
- .o_set = xresp0_sock_set_maxttl,
- },
- // terminate list
- {
- .o_name = NULL,
- },
-};
-
-static nni_proto_sock_ops xresp0_sock_ops = {
- .sock_size = sizeof(xresp0_sock),
- .sock_init = xresp0_sock_init,
- .sock_fini = xresp0_sock_fini,
- .sock_open = xresp0_sock_open,
- .sock_close = xresp0_sock_close,
- .sock_send = xresp0_sock_send,
- .sock_recv = xresp0_sock_recv,
- .sock_options = xresp0_sock_options,
-};
-
-static nni_proto xresp0_proto = {
- .proto_version = NNI_PROTOCOL_VERSION,
- .proto_self = { NNI_PROTO_RESPONDENT_V0, "respondent" },
- .proto_peer = { NNI_PROTO_SURVEYOR_V0, "surveyor" },
- .proto_flags = NNI_PROTO_FLAG_SNDRCV | NNI_PROTO_FLAG_RAW,
- .proto_sock_ops = &xresp0_sock_ops,
- .proto_pipe_ops = &xresp0_pipe_ops,
-};
-
-int
-nng_respondent0_open_raw(nng_socket *sidp)
-{
- return (nni_proto_open(sidp, &xresp0_proto));
-}
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