| /* |
| * |
| * Copyright 2015, 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 "src/core/ext/transport/chttp2/client/chttp2_connector.h" |
| |
| #include <grpc/grpc.h> |
| |
| #include <string.h> |
| |
| #include <grpc/slice_buffer.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/string_util.h> |
| |
| #include "src/core/ext/client_channel/connector.h" |
| #include "src/core/ext/client_channel/http_connect_handshaker.h" |
| #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h" |
| #include "src/core/lib/channel/channel_args.h" |
| #include "src/core/lib/channel/handshaker.h" |
| #include "src/core/lib/iomgr/tcp_client.h" |
| #include "src/core/lib/security/transport/security_connector.h" |
| |
| typedef struct { |
| grpc_connector base; |
| |
| gpr_mu mu; |
| gpr_refcount refs; |
| |
| bool shutdown; |
| bool connecting; |
| |
| char *server_name; |
| grpc_chttp2_create_handshakers_func create_handshakers; |
| void *create_handshakers_user_data; |
| |
| grpc_closure *notify; |
| grpc_connect_in_args args; |
| grpc_connect_out_args *result; |
| grpc_closure initial_string_sent; |
| grpc_slice_buffer initial_string_buffer; |
| |
| grpc_endpoint *endpoint; // Non-NULL until handshaking starts. |
| |
| grpc_closure connected; |
| |
| grpc_handshake_manager *handshake_mgr; |
| } chttp2_connector; |
| |
| static void chttp2_connector_ref(grpc_connector *con) { |
| chttp2_connector *c = (chttp2_connector *)con; |
| gpr_ref(&c->refs); |
| } |
| |
| static void chttp2_connector_unref(grpc_exec_ctx *exec_ctx, |
| grpc_connector *con) { |
| chttp2_connector *c = (chttp2_connector *)con; |
| if (gpr_unref(&c->refs)) { |
| /* c->initial_string_buffer does not need to be destroyed */ |
| gpr_mu_destroy(&c->mu); |
| // If handshaking is not yet in progress, destroy the endpoint. |
| // Otherwise, the handshaker will do this for us. |
| if (c->endpoint != NULL) grpc_endpoint_destroy(exec_ctx, c->endpoint); |
| gpr_free(c->server_name); |
| gpr_free(c); |
| } |
| } |
| |
| static void chttp2_connector_shutdown(grpc_exec_ctx *exec_ctx, |
| grpc_connector *con) { |
| chttp2_connector *c = (chttp2_connector *)con; |
| gpr_mu_lock(&c->mu); |
| c->shutdown = true; |
| if (c->handshake_mgr != NULL) { |
| grpc_handshake_manager_shutdown(exec_ctx, c->handshake_mgr); |
| } |
| // If handshaking is not yet in progress, shutdown the endpoint. |
| // Otherwise, the handshaker will do this for us. |
| if (!c->connecting && c->endpoint != NULL) { |
| grpc_endpoint_shutdown(exec_ctx, c->endpoint); |
| } |
| gpr_mu_unlock(&c->mu); |
| } |
| |
| static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg, |
| grpc_error *error) { |
| grpc_handshaker_args *args = arg; |
| chttp2_connector *c = args->user_data; |
| gpr_mu_lock(&c->mu); |
| if (error != GRPC_ERROR_NONE || c->shutdown) { |
| if (error == GRPC_ERROR_NONE) { |
| error = GRPC_ERROR_CREATE("connector shutdown"); |
| // 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(exec_ctx, args->endpoint); |
| grpc_endpoint_destroy(exec_ctx, args->endpoint); |
| grpc_channel_args_destroy(args->args); |
| grpc_slice_buffer_destroy(args->read_buffer); |
| gpr_free(args->read_buffer); |
| } else { |
| error = GRPC_ERROR_REF(error); |
| } |
| memset(c->result, 0, sizeof(*c->result)); |
| } else { |
| c->result->transport = |
| grpc_create_chttp2_transport(exec_ctx, args->args, args->endpoint, 1); |
| GPR_ASSERT(c->result->transport); |
| grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, |
| args->read_buffer); |
| c->result->channel_args = args->args; |
| } |
| grpc_closure *notify = c->notify; |
| c->notify = NULL; |
| grpc_exec_ctx_sched(exec_ctx, notify, error, NULL); |
| grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr); |
| c->handshake_mgr = NULL; |
| gpr_mu_unlock(&c->mu); |
| chttp2_connector_unref(exec_ctx, (grpc_connector *)c); |
| } |
| |
| static void start_handshake_locked(grpc_exec_ctx *exec_ctx, |
| chttp2_connector *c) { |
| c->handshake_mgr = grpc_handshake_manager_create(); |
| char *proxy_name = grpc_get_http_proxy_server(); |
| if (proxy_name != NULL) { |
| grpc_handshake_manager_add( |
| c->handshake_mgr, |
| grpc_http_connect_handshaker_create(proxy_name, c->server_name)); |
| gpr_free(proxy_name); |
| } |
| if (c->create_handshakers != NULL) { |
| c->create_handshakers(exec_ctx, c->create_handshakers_user_data, |
| c->handshake_mgr); |
| } |
| grpc_handshake_manager_do_handshake( |
| exec_ctx, c->handshake_mgr, c->endpoint, c->args.channel_args, |
| c->args.deadline, NULL /* acceptor */, on_handshake_done, c); |
| c->endpoint = NULL; // Endpoint handed off to handshake manager. |
| } |
| |
| static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg, |
| grpc_error *error) { |
| chttp2_connector *c = arg; |
| gpr_mu_lock(&c->mu); |
| if (error != GRPC_ERROR_NONE || c->shutdown) { |
| if (error == GRPC_ERROR_NONE) { |
| error = GRPC_ERROR_CREATE("connector shutdown"); |
| } else { |
| error = GRPC_ERROR_REF(error); |
| } |
| memset(c->result, 0, sizeof(*c->result)); |
| grpc_closure *notify = c->notify; |
| c->notify = NULL; |
| grpc_exec_ctx_sched(exec_ctx, notify, error, NULL); |
| gpr_mu_unlock(&c->mu); |
| chttp2_connector_unref(exec_ctx, arg); |
| } else { |
| start_handshake_locked(exec_ctx, c); |
| gpr_mu_unlock(&c->mu); |
| } |
| } |
| |
| static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { |
| chttp2_connector *c = arg; |
| gpr_mu_lock(&c->mu); |
| GPR_ASSERT(c->connecting); |
| c->connecting = false; |
| if (error != GRPC_ERROR_NONE || c->shutdown) { |
| if (error == GRPC_ERROR_NONE) { |
| error = GRPC_ERROR_CREATE("connector shutdown"); |
| } else { |
| error = GRPC_ERROR_REF(error); |
| } |
| memset(c->result, 0, sizeof(*c->result)); |
| grpc_closure *notify = c->notify; |
| c->notify = NULL; |
| grpc_exec_ctx_sched(exec_ctx, notify, error, NULL); |
| if (c->endpoint != NULL) grpc_endpoint_shutdown(exec_ctx, c->endpoint); |
| gpr_mu_unlock(&c->mu); |
| chttp2_connector_unref(exec_ctx, arg); |
| } else { |
| GPR_ASSERT(c->endpoint != NULL); |
| if (!GRPC_SLICE_IS_EMPTY(c->args.initial_connect_string)) { |
| grpc_closure_init(&c->initial_string_sent, on_initial_connect_string_sent, |
| c); |
| grpc_slice_buffer_init(&c->initial_string_buffer); |
| grpc_slice_buffer_add(&c->initial_string_buffer, |
| c->args.initial_connect_string); |
| grpc_endpoint_write(exec_ctx, c->endpoint, &c->initial_string_buffer, |
| &c->initial_string_sent); |
| } else { |
| start_handshake_locked(exec_ctx, c); |
| } |
| gpr_mu_unlock(&c->mu); |
| } |
| } |
| |
| static void chttp2_connector_connect(grpc_exec_ctx *exec_ctx, |
| grpc_connector *con, |
| const grpc_connect_in_args *args, |
| grpc_connect_out_args *result, |
| grpc_closure *notify) { |
| chttp2_connector *c = (chttp2_connector *)con; |
| gpr_mu_lock(&c->mu); |
| GPR_ASSERT(c->notify == NULL); |
| c->notify = notify; |
| c->args = *args; |
| c->result = result; |
| GPR_ASSERT(c->endpoint == NULL); |
| chttp2_connector_ref(con); // Ref taken for callback. |
| grpc_closure_init(&c->connected, connected, c); |
| GPR_ASSERT(!c->connecting); |
| c->connecting = true; |
| grpc_tcp_client_connect(exec_ctx, &c->connected, &c->endpoint, |
| args->interested_parties, args->channel_args, |
| args->addr, args->deadline); |
| gpr_mu_unlock(&c->mu); |
| } |
| |
| static const grpc_connector_vtable chttp2_connector_vtable = { |
| chttp2_connector_ref, chttp2_connector_unref, chttp2_connector_shutdown, |
| chttp2_connector_connect}; |
| |
| grpc_connector *grpc_chttp2_connector_create( |
| grpc_exec_ctx *exec_ctx, const char *server_name, |
| grpc_chttp2_create_handshakers_func create_handshakers, |
| void *create_handshakers_user_data) { |
| chttp2_connector *c = gpr_malloc(sizeof(*c)); |
| memset(c, 0, sizeof(*c)); |
| c->base.vtable = &chttp2_connector_vtable; |
| gpr_mu_init(&c->mu); |
| gpr_ref_init(&c->refs, 1); |
| c->server_name = gpr_strdup(server_name); |
| c->create_handshakers = create_handshakers; |
| c->create_handshakers_user_data = create_handshakers_user_data; |
| return &c->base; |
| } |