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/*
*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "test/core/util/passthru_endpoint.h"
#include <inttypes.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/iomgr/sockaddr.h"
#include "src/core/lib/slice/slice_internal.h"
typedef struct passthru_endpoint passthru_endpoint;
typedef struct {
grpc_endpoint base;
passthru_endpoint *parent;
grpc_slice_buffer read_buffer;
grpc_slice_buffer *on_read_out;
grpc_closure *on_read;
grpc_resource_user *resource_user;
} half;
struct passthru_endpoint {
gpr_mu mu;
int halves;
grpc_passthru_endpoint_stats *stats;
grpc_passthru_endpoint_stats
dummy_stats; // used if constructor stats == NULL
bool shutdown;
half client;
half server;
};
static void me_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_slice_buffer *slices, grpc_closure *cb) {
half *m = (half *)ep;
gpr_mu_lock(&m->parent->mu);
if (m->parent->shutdown) {
grpc_closure_sched(exec_ctx, cb, GRPC_ERROR_CREATE("Already shutdown"));
} else if (m->read_buffer.count > 0) {
grpc_slice_buffer_swap(&m->read_buffer, slices);
grpc_closure_sched(exec_ctx, cb, GRPC_ERROR_NONE);
} else {
m->on_read = cb;
m->on_read_out = slices;
}
gpr_mu_unlock(&m->parent->mu);
}
static half *other_half(half *h) {
if (h == &h->parent->client) return &h->parent->server;
return &h->parent->client;
}
static void me_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_slice_buffer *slices, grpc_closure *cb) {
half *m = other_half((half *)ep);
gpr_mu_lock(&m->parent->mu);
grpc_error *error = GRPC_ERROR_NONE;
m->parent->stats->num_writes++;
if (m->parent->shutdown) {
error = GRPC_ERROR_CREATE("Endpoint already shutdown");
} else if (m->on_read != NULL) {
for (size_t i = 0; i < slices->count; i++) {
grpc_slice_buffer_add(m->on_read_out, grpc_slice_ref(slices->slices[i]));
}
grpc_closure_sched(exec_ctx, m->on_read, GRPC_ERROR_NONE);
m->on_read = NULL;
} else {
for (size_t i = 0; i < slices->count; i++) {
grpc_slice_buffer_add(&m->read_buffer, grpc_slice_ref(slices->slices[i]));
}
}
gpr_mu_unlock(&m->parent->mu);
grpc_closure_sched(exec_ctx, cb, error);
}
static void me_add_to_pollset(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_pollset *pollset) {}
static void me_add_to_pollset_set(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_pollset_set *pollset) {}
static void me_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_error *why) {
half *m = (half *)ep;
gpr_mu_lock(&m->parent->mu);
m->parent->shutdown = true;
if (m->on_read) {
grpc_closure_sched(exec_ctx, m->on_read,
GRPC_ERROR_CREATE_REFERENCING("Shutdown", &why, 1));
m->on_read = NULL;
}
m = other_half(m);
if (m->on_read) {
grpc_closure_sched(exec_ctx, m->on_read,
GRPC_ERROR_CREATE_REFERENCING("Shutdown", &why, 1));
m->on_read = NULL;
}
gpr_mu_unlock(&m->parent->mu);
grpc_resource_user_shutdown(exec_ctx, m->resource_user);
GRPC_ERROR_UNREF(why);
}
static void me_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
passthru_endpoint *p = ((half *)ep)->parent;
gpr_mu_lock(&p->mu);
if (0 == --p->halves) {
gpr_mu_unlock(&p->mu);
gpr_mu_destroy(&p->mu);
grpc_slice_buffer_destroy_internal(exec_ctx, &p->client.read_buffer);
grpc_slice_buffer_destroy_internal(exec_ctx, &p->server.read_buffer);
grpc_resource_user_unref(exec_ctx, p->client.resource_user);
grpc_resource_user_unref(exec_ctx, p->server.resource_user);
gpr_free(p);
} else {
gpr_mu_unlock(&p->mu);
}
}
static char *me_get_peer(grpc_endpoint *ep) {
return gpr_strdup("fake:mock_endpoint");
}
static int me_get_fd(grpc_endpoint *ep) { return -1; }
static grpc_workqueue *me_get_workqueue(grpc_endpoint *ep) { return NULL; }
static grpc_resource_user *me_get_resource_user(grpc_endpoint *ep) {
half *m = (half *)ep;
return m->resource_user;
}
static const grpc_endpoint_vtable vtable = {
me_read,
me_write,
me_get_workqueue,
me_add_to_pollset,
me_add_to_pollset_set,
me_shutdown,
me_destroy,
me_get_resource_user,
me_get_peer,
me_get_fd,
};
static void half_init(half *m, passthru_endpoint *parent,
grpc_resource_quota *resource_quota,
const char *half_name) {
m->base.vtable = &vtable;
m->parent = parent;
grpc_slice_buffer_init(&m->read_buffer);
m->on_read = NULL;
char *name;
gpr_asprintf(&name, "passthru_endpoint_%s_%" PRIxPTR, half_name,
(intptr_t)parent);
m->resource_user = grpc_resource_user_create(resource_quota, name);
gpr_free(name);
}
void grpc_passthru_endpoint_create(grpc_endpoint **client,
grpc_endpoint **server,
grpc_resource_quota *resource_quota,
grpc_passthru_endpoint_stats *stats) {
passthru_endpoint *m = gpr_malloc(sizeof(*m));
m->halves = 2;
m->shutdown = 0;
m->stats = stats == NULL ? &m->dummy_stats : stats;
memset(m->stats, 0, sizeof(*m->stats));
half_init(&m->client, m, resource_quota, "client");
half_init(&m->server, m, resource_quota, "server");
gpr_mu_init(&m->mu);
*client = &m->client.base;
*server = &m->server.base;
}
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