--- /dev/null
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/port.h"
+
+#include <limits.h>
+#include <string.h>
+
+#include <grpc/slice_buffer.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/iomgr/error.h"
+#include "src/core/lib/iomgr/iomgr_custom.h"
+#include "src/core/lib/iomgr/resource_quota.h"
+#include "src/core/lib/iomgr/tcp_client.h"
+#include "src/core/lib/iomgr/tcp_custom.h"
+#include "src/core/lib/iomgr/tcp_server.h"
+#include "src/core/lib/slice/slice_internal.h"
+#include "src/core/lib/slice/slice_string_helpers.h"
+
+#define GRPC_TCP_DEFAULT_READ_SLICE_SIZE 8192
+
+extern grpc_core::TraceFlag grpc_tcp_trace;
+
+grpc_socket_vtable* grpc_custom_socket_vtable = nullptr;
+extern grpc_tcp_server_vtable custom_tcp_server_vtable;
+extern grpc_tcp_client_vtable custom_tcp_client_vtable;
+
+void grpc_custom_endpoint_init(grpc_socket_vtable* impl) {
+ grpc_custom_socket_vtable = impl;
+ grpc_set_tcp_client_impl(&custom_tcp_client_vtable);
+ grpc_set_tcp_server_impl(&custom_tcp_server_vtable);
+}
+
+typedef struct {
+ grpc_endpoint base;
+ gpr_refcount refcount;
+ grpc_custom_socket* socket;
+
+ grpc_closure* read_cb;
+ grpc_closure* write_cb;
+
+ grpc_slice_buffer* read_slices;
+ grpc_slice_buffer* write_slices;
+
+ grpc_resource_user* resource_user;
+ grpc_resource_user_slice_allocator slice_allocator;
+
+ bool shutting_down;
+
+ char* peer_string;
+} custom_tcp_endpoint;
+
+static void tcp_free(grpc_custom_socket* s) {
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)s->endpoint;
+ grpc_resource_user_unref(tcp->resource_user);
+ gpr_free(tcp->peer_string);
+ gpr_free(tcp);
+ s->refs--;
+ if (s->refs == 0) {
+ grpc_custom_socket_vtable->destroy(s);
+ gpr_free(s);
+ }
+}
+
+#ifndef NDEBUG
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp), (reason), __FILE__, __LINE__)
+#define TCP_REF(tcp, reason) tcp_ref((tcp), (reason), __FILE__, __LINE__)
+static void tcp_unref(custom_tcp_endpoint* tcp, const char* reason,
+ const char* file, int line) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ gpr_atm val = gpr_atm_no_barrier_load(&tcp->refcount.count);
+ gpr_log(file, line, GPR_LOG_SEVERITY_ERROR,
+ "TCP unref %p : %s %" PRIdPTR " -> %" PRIdPTR, tcp->socket, reason,
+ val, val - 1);
+ }
+ if (gpr_unref(&tcp->refcount)) {
+ tcp_free(tcp->socket);
+ }
+}
+
+static void tcp_ref(custom_tcp_endpoint* tcp, const char* reason,
+ const char* file, int line) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ gpr_atm val = gpr_atm_no_barrier_load(&tcp->refcount.count);
+ gpr_log(file, line, GPR_LOG_SEVERITY_ERROR,
+ "TCP ref %p : %s %" PRIdPTR " -> %" PRIdPTR, tcp->socket, reason,
+ val, val + 1);
+ }
+ gpr_ref(&tcp->refcount);
+}
+#else
+#define TCP_UNREF(tcp, reason) tcp_unref((tcp))
+#define TCP_REF(tcp, reason) tcp_ref((tcp))
+static void tcp_unref(custom_tcp_endpoint* tcp) {
+ if (gpr_unref(&tcp->refcount)) {
+ tcp_free(tcp->socket);
+ }
+}
+
+static void tcp_ref(custom_tcp_endpoint* tcp) { gpr_ref(&tcp->refcount); }
+#endif
+
+static void call_read_cb(custom_tcp_endpoint* tcp, grpc_error* error) {
+ grpc_closure* cb = tcp->read_cb;
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ gpr_log(GPR_INFO, "TCP:%p call_cb %p %p:%p", tcp->socket, cb, cb->cb,
+ cb->cb_arg);
+ size_t i;
+ const char* str = grpc_error_string(error);
+ gpr_log(GPR_INFO, "read: error=%s", str);
+
+ for (i = 0; i < tcp->read_slices->count; i++) {
+ char* dump = grpc_dump_slice(tcp->read_slices->slices[i],
+ GPR_DUMP_HEX | GPR_DUMP_ASCII);
+ gpr_log(GPR_INFO, "READ %p (peer=%s): %s", tcp, tcp->peer_string, dump);
+ gpr_free(dump);
+ }
+ }
+ TCP_UNREF(tcp, "read");
+ tcp->read_slices = nullptr;
+ tcp->read_cb = nullptr;
+ GRPC_CLOSURE_SCHED(cb, error);
+}
+
+static void custom_read_callback(grpc_custom_socket* socket, size_t nread,
+ grpc_error* error) {
+ grpc_core::ApplicationCallbackExecCtx callback_exec_ctx;
+ grpc_core::ExecCtx exec_ctx;
+ grpc_slice_buffer garbage;
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)socket->endpoint;
+ if (error == GRPC_ERROR_NONE && nread == 0) {
+ error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("EOF");
+ }
+ if (error == GRPC_ERROR_NONE) {
+ // Successful read
+ if ((size_t)nread < tcp->read_slices->length) {
+ /* TODO(murgatroid99): Instead of discarding the unused part of the read
+ * buffer, reuse it as the next read buffer. */
+ grpc_slice_buffer_init(&garbage);
+ grpc_slice_buffer_trim_end(
+ tcp->read_slices, tcp->read_slices->length - (size_t)nread, &garbage);
+ grpc_slice_buffer_reset_and_unref_internal(&garbage);
+ }
+ } else {
+ grpc_slice_buffer_reset_and_unref_internal(tcp->read_slices);
+ }
+ call_read_cb(tcp, error);
+}
+
+static void tcp_read_allocation_done(void* tcpp, grpc_error* error) {
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)tcpp;
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ gpr_log(GPR_INFO, "TCP:%p read_allocation_done: %s", tcp->socket,
+ grpc_error_string(error));
+ }
+ if (error == GRPC_ERROR_NONE) {
+ /* Before calling read, we allocate a buffer with exactly one slice
+ * to tcp->read_slices and wait for the callback indicating that the
+ * allocation was successful. So slices[0] should always exist here */
+ char* buffer = (char*)GRPC_SLICE_START_PTR(tcp->read_slices->slices[0]);
+ size_t len = GRPC_SLICE_LENGTH(tcp->read_slices->slices[0]);
+ grpc_custom_socket_vtable->read(tcp->socket, buffer, len,
+ custom_read_callback);
+ } else {
+ grpc_slice_buffer_reset_and_unref_internal(tcp->read_slices);
+ call_read_cb(tcp, GRPC_ERROR_REF(error));
+ }
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ const char* str = grpc_error_string(error);
+ gpr_log(GPR_INFO, "Initiating read on %p: error=%s", tcp->socket, str);
+ }
+}
+
+static void endpoint_read(grpc_endpoint* ep, grpc_slice_buffer* read_slices,
+ grpc_closure* cb, bool urgent) {
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)ep;
+ GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD();
+ GPR_ASSERT(tcp->read_cb == nullptr);
+ tcp->read_cb = cb;
+ tcp->read_slices = read_slices;
+ grpc_slice_buffer_reset_and_unref_internal(read_slices);
+ TCP_REF(tcp, "read");
+ grpc_resource_user_alloc_slices(&tcp->slice_allocator,
+ GRPC_TCP_DEFAULT_READ_SLICE_SIZE, 1,
+ tcp->read_slices);
+}
+
+static void custom_write_callback(grpc_custom_socket* socket,
+ grpc_error* error) {
+ grpc_core::ApplicationCallbackExecCtx callback_exec_ctx;
+ grpc_core::ExecCtx exec_ctx;
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)socket->endpoint;
+ grpc_closure* cb = tcp->write_cb;
+ tcp->write_cb = nullptr;
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ const char* str = grpc_error_string(error);
+ gpr_log(GPR_INFO, "write complete on %p: error=%s", tcp->socket, str);
+ }
+ TCP_UNREF(tcp, "write");
+ GRPC_CLOSURE_SCHED(cb, error);
+}
+
+static void endpoint_write(grpc_endpoint* ep, grpc_slice_buffer* write_slices,
+ grpc_closure* cb, void* arg) {
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)ep;
+ GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD();
+
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ size_t j;
+
+ for (j = 0; j < write_slices->count; j++) {
+ char* data = grpc_dump_slice(write_slices->slices[j],
+ GPR_DUMP_HEX | GPR_DUMP_ASCII);
+ gpr_log(GPR_INFO, "WRITE %p (peer=%s): %s", tcp->socket, tcp->peer_string,
+ data);
+ gpr_free(data);
+ }
+ }
+
+ if (tcp->shutting_down) {
+ GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+ "TCP socket is shutting down"));
+ return;
+ }
+
+ GPR_ASSERT(tcp->write_cb == nullptr);
+ tcp->write_slices = write_slices;
+ GPR_ASSERT(tcp->write_slices->count <= UINT_MAX);
+ if (tcp->write_slices->count == 0) {
+ // No slices means we don't have to do anything,
+ // and libuv doesn't like empty writes
+ GRPC_CLOSURE_SCHED(cb, GRPC_ERROR_NONE);
+ return;
+ }
+ tcp->write_cb = cb;
+ TCP_REF(tcp, "write");
+ grpc_custom_socket_vtable->write(tcp->socket, tcp->write_slices,
+ custom_write_callback);
+}
+
+static void endpoint_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
+ // No-op. We're ignoring pollsets currently
+ (void)ep;
+ (void)pollset;
+}
+
+static void endpoint_add_to_pollset_set(grpc_endpoint* ep,
+ grpc_pollset_set* pollset) {
+ // No-op. We're ignoring pollsets currently
+ (void)ep;
+ (void)pollset;
+}
+
+static void endpoint_delete_from_pollset_set(grpc_endpoint* ep,
+ grpc_pollset_set* pollset) {
+ // No-op. We're ignoring pollsets currently
+ (void)ep;
+ (void)pollset;
+}
+
+static void endpoint_shutdown(grpc_endpoint* ep, grpc_error* why) {
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)ep;
+ if (!tcp->shutting_down) {
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ const char* str = grpc_error_string(why);
+ gpr_log(GPR_INFO, "TCP %p shutdown why=%s", tcp->socket, str);
+ }
+ tcp->shutting_down = true;
+ // GRPC_CLOSURE_SCHED(tcp->read_cb, GRPC_ERROR_REF(why));
+ // GRPC_CLOSURE_SCHED(tcp->write_cb, GRPC_ERROR_REF(why));
+ // tcp->read_cb = nullptr;
+ // tcp->write_cb = nullptr;
+ grpc_resource_user_shutdown(tcp->resource_user);
+ grpc_custom_socket_vtable->shutdown(tcp->socket);
+ }
+ GRPC_ERROR_UNREF(why);
+}
+
+static void custom_close_callback(grpc_custom_socket* socket) {
+ socket->refs--;
+ if (socket->refs == 0) {
+ grpc_custom_socket_vtable->destroy(socket);
+ gpr_free(socket);
+ } else if (socket->endpoint) {
+ grpc_core::ApplicationCallbackExecCtx callback_exec_ctx;
+ grpc_core::ExecCtx exec_ctx;
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)socket->endpoint;
+ TCP_UNREF(tcp, "destroy");
+ }
+}
+
+static void endpoint_destroy(grpc_endpoint* ep) {
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)ep;
+ grpc_custom_socket_vtable->close(tcp->socket, custom_close_callback);
+}
+
+static char* endpoint_get_peer(grpc_endpoint* ep) {
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)ep;
+ return gpr_strdup(tcp->peer_string);
+}
+
+static grpc_resource_user* endpoint_get_resource_user(grpc_endpoint* ep) {
+ custom_tcp_endpoint* tcp = (custom_tcp_endpoint*)ep;
+ return tcp->resource_user;
+}
+
+static int endpoint_get_fd(grpc_endpoint* ep) { return -1; }
+
+static bool endpoint_can_track_err(grpc_endpoint* ep) { return false; }
+
+static grpc_endpoint_vtable vtable = {endpoint_read,
+ endpoint_write,
+ endpoint_add_to_pollset,
+ endpoint_add_to_pollset_set,
+ endpoint_delete_from_pollset_set,
+ endpoint_shutdown,
+ endpoint_destroy,
+ endpoint_get_resource_user,
+ endpoint_get_peer,
+ endpoint_get_fd,
+ endpoint_can_track_err};
+
+grpc_endpoint* custom_tcp_endpoint_create(grpc_custom_socket* socket,
+ grpc_resource_quota* resource_quota,
+ char* peer_string) {
+ custom_tcp_endpoint* tcp =
+ (custom_tcp_endpoint*)gpr_malloc(sizeof(custom_tcp_endpoint));
+ grpc_core::ApplicationCallbackExecCtx callback_exec_ctx;
+ grpc_core::ExecCtx exec_ctx;
+
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ gpr_log(GPR_INFO, "Creating TCP endpoint %p", socket);
+ }
+ memset(tcp, 0, sizeof(custom_tcp_endpoint));
+ socket->refs++;
+ socket->endpoint = (grpc_endpoint*)tcp;
+ tcp->socket = socket;
+ tcp->base.vtable = &vtable;
+ gpr_ref_init(&tcp->refcount, 1);
+ tcp->peer_string = gpr_strdup(peer_string);
+ tcp->shutting_down = false;
+ tcp->resource_user = grpc_resource_user_create(resource_quota, peer_string);
+ grpc_resource_user_slice_allocator_init(
+ &tcp->slice_allocator, tcp->resource_user, tcp_read_allocation_done, tcp);
+
+ return &tcp->base;
+}
git://repos.xcallymotion.com / motion2.git / blobdiff