--- /dev/null
+/*
+ *
+ * Copyright 2015 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/ext/transport/chttp2/server/chttp2_server.h"
+
+#include <inttypes.h>
+#include <limits.h>
+#include <string.h>
+
+#include <grpc/grpc.h>
+#include <grpc/impl/codegen/grpc_types.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+
+#include "src/core/ext/filters/http/server/http_server_filter.h"
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/channel/handshaker.h"
+#include "src/core/lib/channel/handshaker_registry.h"
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/resource_quota.h"
+#include "src/core/lib/iomgr/tcp_server.h"
+#include "src/core/lib/slice/slice_internal.h"
+#include "src/core/lib/surface/api_trace.h"
+#include "src/core/lib/surface/server.h"
+
+typedef struct {
+ grpc_server* server;
+ grpc_tcp_server* tcp_server;
+ grpc_channel_args* args;
+ gpr_mu mu;
+ bool shutdown;
+ grpc_closure tcp_server_shutdown_complete;
+ grpc_closure* server_destroy_listener_done;
+ grpc_core::HandshakeManager* pending_handshake_mgrs;
+ grpc_core::RefCountedPtr<grpc_core::channelz::ListenSocketNode>
+ channelz_listen_socket;
+} server_state;
+
+typedef struct {
+ gpr_refcount refs;
+ server_state* svr_state;
+ grpc_pollset* accepting_pollset;
+ grpc_tcp_server_acceptor* acceptor;
+ grpc_core::RefCountedPtr<grpc_core::HandshakeManager> handshake_mgr;
+ // State for enforcing handshake timeout on receiving HTTP/2 settings.
+ grpc_chttp2_transport* transport;
+ grpc_millis deadline;
+ grpc_timer timer;
+ grpc_closure on_timeout;
+ grpc_closure on_receive_settings;
+ grpc_pollset_set* interested_parties;
+} server_connection_state;
+
+static void server_connection_state_unref(
+ server_connection_state* connection_state) {
+ if (gpr_unref(&connection_state->refs)) {
+ if (connection_state->transport != nullptr) {
+ GRPC_CHTTP2_UNREF_TRANSPORT(connection_state->transport,
+ "receive settings timeout");
+ }
+ grpc_pollset_set_del_pollset(connection_state->interested_parties,
+ connection_state->accepting_pollset);
+ grpc_pollset_set_destroy(connection_state->interested_parties);
+ gpr_free(connection_state);
+ }
+}
+
+static void on_timeout(void* arg, grpc_error* error) {
+ server_connection_state* connection_state =
+ static_cast<server_connection_state*>(arg);
+ // Note that we may be called with GRPC_ERROR_NONE when the timer fires
+ // or with an error indicating that the timer system is being shut down.
+ if (error != GRPC_ERROR_CANCELLED) {
+ grpc_transport_op* op = grpc_make_transport_op(nullptr);
+ op->disconnect_with_error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+ "Did not receive HTTP/2 settings before handshake timeout");
+ grpc_transport_perform_op(&connection_state->transport->base, op);
+ }
+ server_connection_state_unref(connection_state);
+}
+
+static void on_receive_settings(void* arg, grpc_error* error) {
+ server_connection_state* connection_state =
+ static_cast<server_connection_state*>(arg);
+ if (error == GRPC_ERROR_NONE) {
+ grpc_timer_cancel(&connection_state->timer);
+ }
+ server_connection_state_unref(connection_state);
+}
+
+static void on_handshake_done(void* arg, grpc_error* error) {
+ auto* args = static_cast<grpc_core::HandshakerArgs*>(arg);
+ server_connection_state* connection_state =
+ static_cast<server_connection_state*>(args->user_data);
+ gpr_mu_lock(&connection_state->svr_state->mu);
+ grpc_resource_user* resource_user = grpc_server_get_default_resource_user(
+ connection_state->svr_state->server);
+ if (error != GRPC_ERROR_NONE || connection_state->svr_state->shutdown) {
+ const char* error_str = grpc_error_string(error);
+ gpr_log(GPR_DEBUG, "Handshaking failed: %s", error_str);
+ grpc_resource_user* resource_user = grpc_server_get_default_resource_user(
+ connection_state->svr_state->server);
+ if (resource_user != nullptr) {
+ grpc_resource_user_free(resource_user, GRPC_RESOURCE_QUOTA_CHANNEL_SIZE);
+ }
+ if (error == GRPC_ERROR_NONE && args->endpoint != nullptr) {
+ // We were shut down after handshaking completed successfully, so
+ // destroy the endpoint here.
+ // TODO(ctiller): It is currently necessary to shutdown endpoints
+ // before destroying them, even if we know that there are no
+ // pending read/write callbacks. This should be fixed, at which
+ // point this can be removed.
+ grpc_endpoint_shutdown(args->endpoint, GRPC_ERROR_NONE);
+ grpc_endpoint_destroy(args->endpoint);
+ grpc_channel_args_destroy(args->args);
+ grpc_slice_buffer_destroy_internal(args->read_buffer);
+ gpr_free(args->read_buffer);
+ }
+ } else {
+ // If the handshaking succeeded but there is no endpoint, then the
+ // handshaker may have handed off the connection to some external
+ // code, so we can just clean up here without creating a transport.
+ if (args->endpoint != nullptr) {
+ grpc_transport* transport = grpc_create_chttp2_transport(
+ args->args, args->endpoint, false, resource_user);
+ grpc_server_setup_transport(
+ connection_state->svr_state->server, transport,
+ connection_state->accepting_pollset, args->args,
+ grpc_chttp2_transport_get_socket_node(transport), resource_user);
+ // Use notify_on_receive_settings callback to enforce the
+ // handshake deadline.
+ connection_state->transport =
+ reinterpret_cast<grpc_chttp2_transport*>(transport);
+ gpr_ref(&connection_state->refs);
+ GRPC_CLOSURE_INIT(&connection_state->on_receive_settings,
+ on_receive_settings, connection_state,
+ grpc_schedule_on_exec_ctx);
+ grpc_chttp2_transport_start_reading(
+ transport, args->read_buffer, &connection_state->on_receive_settings);
+ grpc_channel_args_destroy(args->args);
+ gpr_ref(&connection_state->refs);
+ GRPC_CHTTP2_REF_TRANSPORT((grpc_chttp2_transport*)transport,
+ "receive settings timeout");
+ GRPC_CLOSURE_INIT(&connection_state->on_timeout, on_timeout,
+ connection_state, grpc_schedule_on_exec_ctx);
+ grpc_timer_init(&connection_state->timer, connection_state->deadline,
+ &connection_state->on_timeout);
+ } else {
+ if (resource_user != nullptr) {
+ grpc_resource_user_free(resource_user,
+ GRPC_RESOURCE_QUOTA_CHANNEL_SIZE);
+ }
+ }
+ }
+ connection_state->handshake_mgr->RemoveFromPendingMgrList(
+ &connection_state->svr_state->pending_handshake_mgrs);
+ gpr_mu_unlock(&connection_state->svr_state->mu);
+ connection_state->handshake_mgr.reset();
+ gpr_free(connection_state->acceptor);
+ grpc_tcp_server_unref(connection_state->svr_state->tcp_server);
+ server_connection_state_unref(connection_state);
+}
+
+static void on_accept(void* arg, grpc_endpoint* tcp,
+ grpc_pollset* accepting_pollset,
+ grpc_tcp_server_acceptor* acceptor) {
+ server_state* state = static_cast<server_state*>(arg);
+ gpr_mu_lock(&state->mu);
+ if (state->shutdown) {
+ gpr_mu_unlock(&state->mu);
+ grpc_endpoint_shutdown(tcp, GRPC_ERROR_NONE);
+ grpc_endpoint_destroy(tcp);
+ gpr_free(acceptor);
+ return;
+ }
+ grpc_resource_user* resource_user =
+ grpc_server_get_default_resource_user(state->server);
+ if (resource_user != nullptr &&
+ !grpc_resource_user_safe_alloc(resource_user,
+ GRPC_RESOURCE_QUOTA_CHANNEL_SIZE)) {
+ gpr_log(
+ GPR_ERROR,
+ "Memory quota exhausted, rejecting the connection, no handshaking.");
+ gpr_mu_unlock(&state->mu);
+ grpc_endpoint_shutdown(tcp, GRPC_ERROR_NONE);
+ grpc_endpoint_destroy(tcp);
+ gpr_free(acceptor);
+ return;
+ }
+ auto handshake_mgr = grpc_core::MakeRefCounted<grpc_core::HandshakeManager>();
+ handshake_mgr->AddToPendingMgrList(&state->pending_handshake_mgrs);
+ grpc_tcp_server_ref(state->tcp_server);
+ gpr_mu_unlock(&state->mu);
+ server_connection_state* connection_state =
+ static_cast<server_connection_state*>(
+ gpr_zalloc(sizeof(*connection_state)));
+ gpr_ref_init(&connection_state->refs, 1);
+ connection_state->svr_state = state;
+ connection_state->accepting_pollset = accepting_pollset;
+ connection_state->acceptor = acceptor;
+ connection_state->handshake_mgr = handshake_mgr;
+ connection_state->interested_parties = grpc_pollset_set_create();
+ grpc_pollset_set_add_pollset(connection_state->interested_parties,
+ connection_state->accepting_pollset);
+ grpc_core::HandshakerRegistry::AddHandshakers(
+ grpc_core::HANDSHAKER_SERVER, state->args,
+ connection_state->interested_parties,
+ connection_state->handshake_mgr.get());
+ const grpc_arg* timeout_arg =
+ grpc_channel_args_find(state->args, GRPC_ARG_SERVER_HANDSHAKE_TIMEOUT_MS);
+ connection_state->deadline =
+ grpc_core::ExecCtx::Get()->Now() +
+ grpc_channel_arg_get_integer(timeout_arg,
+ {120 * GPR_MS_PER_SEC, 1, INT_MAX});
+ connection_state->handshake_mgr->DoHandshake(
+ tcp, state->args, connection_state->deadline, acceptor, on_handshake_done,
+ connection_state);
+}
+
+/* Server callback: start listening on our ports */
+static void server_start_listener(grpc_server* server, void* arg,
+ grpc_pollset** pollsets,
+ size_t pollset_count) {
+ server_state* state = static_cast<server_state*>(arg);
+ gpr_mu_lock(&state->mu);
+ state->shutdown = false;
+ gpr_mu_unlock(&state->mu);
+ grpc_tcp_server_start(state->tcp_server, pollsets, pollset_count, on_accept,
+ state);
+}
+
+static void tcp_server_shutdown_complete(void* arg, grpc_error* error) {
+ server_state* state = static_cast<server_state*>(arg);
+ /* ensure all threads have unlocked */
+ gpr_mu_lock(&state->mu);
+ grpc_closure* destroy_done = state->server_destroy_listener_done;
+ GPR_ASSERT(state->shutdown);
+ if (state->pending_handshake_mgrs != nullptr) {
+ state->pending_handshake_mgrs->ShutdownAllPending(GRPC_ERROR_REF(error));
+ }
+ state->channelz_listen_socket.reset();
+ gpr_mu_unlock(&state->mu);
+ // Flush queued work before destroying handshaker factory, since that
+ // may do a synchronous unref.
+ grpc_core::ExecCtx::Get()->Flush();
+ if (destroy_done != nullptr) {
+ GRPC_CLOSURE_SCHED(destroy_done, GRPC_ERROR_REF(error));
+ grpc_core::ExecCtx::Get()->Flush();
+ }
+ grpc_channel_args_destroy(state->args);
+ gpr_mu_destroy(&state->mu);
+ gpr_free(state);
+}
+
+/* Server callback: destroy the tcp listener (so we don't generate further
+ callbacks) */
+static void server_destroy_listener(grpc_server* server, void* arg,
+ grpc_closure* destroy_done) {
+ server_state* state = static_cast<server_state*>(arg);
+ gpr_mu_lock(&state->mu);
+ state->shutdown = true;
+ state->server_destroy_listener_done = destroy_done;
+ grpc_tcp_server* tcp_server = state->tcp_server;
+ gpr_mu_unlock(&state->mu);
+ grpc_tcp_server_shutdown_listeners(tcp_server);
+ grpc_tcp_server_unref(tcp_server);
+}
+
+static grpc_error* chttp2_server_add_acceptor(grpc_server* server,
+ const char* name,
+ grpc_channel_args* args) {
+ grpc_tcp_server* tcp_server = nullptr;
+ grpc_error* err = GRPC_ERROR_NONE;
+ server_state* state = nullptr;
+ const grpc_arg* arg = nullptr;
+ grpc_core::TcpServerFdHandler** arg_val = nullptr;
+ state = static_cast<server_state*>(gpr_zalloc(sizeof(*state)));
+ GRPC_CLOSURE_INIT(&state->tcp_server_shutdown_complete,
+ tcp_server_shutdown_complete, state,
+ grpc_schedule_on_exec_ctx);
+ err = grpc_tcp_server_create(&state->tcp_server_shutdown_complete, args,
+ &tcp_server);
+ if (err != GRPC_ERROR_NONE) {
+ goto error;
+ }
+ state->server = server;
+ state->tcp_server = tcp_server;
+ state->args = args;
+ state->shutdown = true;
+ gpr_mu_init(&state->mu);
+ // TODO(yangg) channelz
+ arg = grpc_channel_args_find(args, name);
+ GPR_ASSERT(arg->type == GRPC_ARG_POINTER);
+ arg_val = static_cast<grpc_core::TcpServerFdHandler**>(arg->value.pointer.p);
+ *arg_val = grpc_tcp_server_create_fd_handler(tcp_server);
+
+ grpc_server_add_listener(server, state, server_start_listener,
+ server_destroy_listener, /* node */ nullptr);
+ return err;
+
+/* Error path: cleanup and return */
+error:
+ GPR_ASSERT(err != GRPC_ERROR_NONE);
+ if (tcp_server) {
+ grpc_tcp_server_unref(tcp_server);
+ } else {
+ grpc_channel_args_destroy(args);
+ gpr_free(state);
+ }
+ return err;
+}
+
+grpc_error* grpc_chttp2_server_add_port(grpc_server* server, const char* addr,
+ grpc_channel_args* args,
+ int* port_num) {
+ grpc_resolved_addresses* resolved = nullptr;
+ grpc_tcp_server* tcp_server = nullptr;
+ size_t i;
+ size_t count = 0;
+ int port_temp;
+ grpc_error* err = GRPC_ERROR_NONE;
+ server_state* state = nullptr;
+ grpc_error** errors = nullptr;
+ size_t naddrs = 0;
+ const grpc_arg* arg = nullptr;
+
+ *port_num = -1;
+
+ if (strncmp(addr, "external:", 9) == 0) {
+ return chttp2_server_add_acceptor(server, addr, args);
+ }
+
+ /* resolve address */
+ err = grpc_blocking_resolve_address(addr, "https", &resolved);
+ if (err != GRPC_ERROR_NONE) {
+ goto error;
+ }
+ state = static_cast<server_state*>(gpr_zalloc(sizeof(*state)));
+ GRPC_CLOSURE_INIT(&state->tcp_server_shutdown_complete,
+ tcp_server_shutdown_complete, state,
+ grpc_schedule_on_exec_ctx);
+ err = grpc_tcp_server_create(&state->tcp_server_shutdown_complete, args,
+ &tcp_server);
+ if (err != GRPC_ERROR_NONE) {
+ goto error;
+ }
+
+ state->server = server;
+ state->tcp_server = tcp_server;
+ state->args = args;
+ state->shutdown = true;
+ gpr_mu_init(&state->mu);
+
+ naddrs = resolved->naddrs;
+ errors = static_cast<grpc_error**>(gpr_malloc(sizeof(*errors) * naddrs));
+ for (i = 0; i < naddrs; i++) {
+ errors[i] =
+ grpc_tcp_server_add_port(tcp_server, &resolved->addrs[i], &port_temp);
+ if (errors[i] == GRPC_ERROR_NONE) {
+ if (*port_num == -1) {
+ *port_num = port_temp;
+ } else {
+ GPR_ASSERT(*port_num == port_temp);
+ }
+ count++;
+ }
+ }
+ if (count == 0) {
+ char* msg;
+ gpr_asprintf(&msg, "No address added out of total %" PRIuPTR " resolved",
+ naddrs);
+ err = GRPC_ERROR_CREATE_REFERENCING_FROM_COPIED_STRING(msg, errors, naddrs);
+ gpr_free(msg);
+ goto error;
+ } else if (count != naddrs) {
+ char* msg;
+ gpr_asprintf(&msg,
+ "Only %" PRIuPTR " addresses added out of total %" PRIuPTR
+ " resolved",
+ count, naddrs);
+ err = GRPC_ERROR_CREATE_REFERENCING_FROM_COPIED_STRING(msg, errors, naddrs);
+ gpr_free(msg);
+
+ const char* warning_message = grpc_error_string(err);
+ gpr_log(GPR_INFO, "WARNING: %s", warning_message);
+
+ /* we managed to bind some addresses: continue */
+ }
+ grpc_resolved_addresses_destroy(resolved);
+
+ arg = grpc_channel_args_find(args, GRPC_ARG_ENABLE_CHANNELZ);
+ if (grpc_channel_arg_get_bool(arg, GRPC_ENABLE_CHANNELZ_DEFAULT)) {
+ char* socket_name = nullptr;
+ gpr_asprintf(&socket_name, "chttp2 listener %s", addr);
+ state->channelz_listen_socket =
+ grpc_core::MakeRefCounted<grpc_core::channelz::ListenSocketNode>(
+ grpc_core::UniquePtr<char>(gpr_strdup(addr)),
+ grpc_core::UniquePtr<char>(socket_name));
+ }
+
+ /* Register with the server only upon success */
+ grpc_server_add_listener(server, state, server_start_listener,
+ server_destroy_listener,
+ state->channelz_listen_socket);
+ goto done;
+
+/* Error path: cleanup and return */
+error:
+ GPR_ASSERT(err != GRPC_ERROR_NONE);
+ if (resolved) {
+ grpc_resolved_addresses_destroy(resolved);
+ }
+ if (tcp_server) {
+ grpc_tcp_server_unref(tcp_server);
+ } else {
+ grpc_channel_args_destroy(args);
+ gpr_free(state);
+ }
+ *port_num = 0;
+
+done:
+ if (errors != nullptr) {
+ for (i = 0; i < naddrs; i++) {
+ GRPC_ERROR_UNREF(errors[i]);
+ }
+ gpr_free(errors);
+ }
+ return err;
+}
git://repos.xcallymotion.com / motion2.git / blobdiff