| /* |
| * |
| * 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 <grpc/grpc.h> |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/slice.h> |
| #include <grpc/support/slice_buffer.h> |
| |
| #include "src/core/ext/client_config/client_channel.h" |
| #include "src/core/ext/client_config/http_connect_handshaker.h" |
| #include "src/core/ext/client_config/resolver_registry.h" |
| #include "src/core/ext/transport/chttp2/transport/chttp2_transport.h" |
| #include "src/core/lib/channel/channel_args.h" |
| #include "src/core/lib/channel/compress_filter.h" |
| #include "src/core/lib/channel/handshaker.h" |
| #include "src/core/lib/channel/http_client_filter.h" |
| #include "src/core/lib/iomgr/tcp_client.h" |
| #include "src/core/lib/surface/api_trace.h" |
| #include "src/core/lib/surface/channel.h" |
| |
| typedef struct { |
| grpc_connector base; |
| gpr_refcount refs; |
| |
| grpc_closure *notify; |
| grpc_connect_in_args args; |
| grpc_connect_out_args *result; |
| grpc_closure initial_string_sent; |
| gpr_slice_buffer initial_string_buffer; |
| |
| grpc_endpoint *tcp; |
| |
| grpc_closure connected; |
| |
| grpc_handshake_manager *handshake_mgr; |
| } connector; |
| |
| static void connector_ref(grpc_connector *con) { |
| connector *c = (connector *)con; |
| gpr_ref(&c->refs); |
| } |
| |
| static void connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *con) { |
| connector *c = (connector *)con; |
| if (gpr_unref(&c->refs)) { |
| /* c->initial_string_buffer does not need to be destroyed */ |
| grpc_handshake_manager_destroy(exec_ctx, c->handshake_mgr); |
| gpr_free(c); |
| } |
| } |
| |
| static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg, |
| grpc_error *error) { |
| connector_unref(exec_ctx, arg); |
| } |
| |
| static void on_handshake_done(grpc_exec_ctx *exec_ctx, grpc_endpoint *endpoint, |
| grpc_channel_args *args, |
| gpr_slice_buffer *read_buffer, void *user_data, |
| grpc_error *error) { |
| connector *c = user_data; |
| if (error != GRPC_ERROR_NONE) { |
| grpc_channel_args_destroy(args); |
| gpr_free(read_buffer); |
| } else { |
| c->result->transport = |
| grpc_create_chttp2_transport(exec_ctx, args, endpoint, 1); |
| GPR_ASSERT(c->result->transport); |
| grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, |
| read_buffer); |
| c->result->channel_args = args; |
| } |
| grpc_closure *notify = c->notify; |
| c->notify = NULL; |
| grpc_exec_ctx_sched(exec_ctx, notify, error, NULL); |
| } |
| |
| static void connected(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { |
| connector *c = arg; |
| grpc_endpoint *tcp = c->tcp; |
| if (tcp != NULL) { |
| if (!GPR_SLICE_IS_EMPTY(c->args.initial_connect_string)) { |
| grpc_closure_init(&c->initial_string_sent, on_initial_connect_string_sent, |
| c); |
| gpr_slice_buffer_init(&c->initial_string_buffer); |
| gpr_slice_buffer_add(&c->initial_string_buffer, |
| c->args.initial_connect_string); |
| connector_ref(arg); |
| grpc_endpoint_write(exec_ctx, tcp, &c->initial_string_buffer, |
| &c->initial_string_sent); |
| } else { |
| grpc_handshake_manager_do_handshake( |
| exec_ctx, c->handshake_mgr, tcp, c->args.channel_args, |
| c->args.deadline, NULL /* acceptor */, on_handshake_done, c); |
| } |
| } else { |
| memset(c->result, 0, sizeof(*c->result)); |
| grpc_closure *notify = c->notify; |
| c->notify = NULL; |
| grpc_exec_ctx_sched(exec_ctx, notify, GRPC_ERROR_REF(error), NULL); |
| } |
| } |
| |
| static void connector_shutdown(grpc_exec_ctx *exec_ctx, grpc_connector *con) {} |
| |
| static void connector_connect(grpc_exec_ctx *exec_ctx, grpc_connector *con, |
| const grpc_connect_in_args *args, |
| grpc_connect_out_args *result, |
| grpc_closure *notify) { |
| connector *c = (connector *)con; |
| GPR_ASSERT(c->notify == NULL); |
| GPR_ASSERT(notify->cb); |
| c->notify = notify; |
| c->args = *args; |
| c->result = result; |
| c->tcp = NULL; |
| grpc_closure_init(&c->connected, connected, c); |
| grpc_tcp_client_connect(exec_ctx, &c->connected, &c->tcp, |
| args->interested_parties, args->addr, args->addr_len, |
| args->deadline); |
| } |
| |
| static const grpc_connector_vtable connector_vtable = { |
| connector_ref, connector_unref, connector_shutdown, connector_connect}; |
| |
| typedef struct { |
| grpc_client_channel_factory base; |
| gpr_refcount refs; |
| grpc_channel_args *merge_args; |
| } client_channel_factory; |
| |
| static void client_channel_factory_ref( |
| grpc_client_channel_factory *cc_factory) { |
| client_channel_factory *f = (client_channel_factory *)cc_factory; |
| gpr_ref(&f->refs); |
| } |
| |
| static void client_channel_factory_unref( |
| grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory) { |
| client_channel_factory *f = (client_channel_factory *)cc_factory; |
| if (gpr_unref(&f->refs)) { |
| grpc_channel_args_destroy(f->merge_args); |
| gpr_free(f); |
| } |
| } |
| |
| static grpc_subchannel *client_channel_factory_create_subchannel( |
| grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory, |
| grpc_subchannel_args *args) { |
| client_channel_factory *f = (client_channel_factory *)cc_factory; |
| connector *c = gpr_malloc(sizeof(*c)); |
| grpc_channel_args *final_args = |
| grpc_channel_args_merge(args->args, f->merge_args); |
| grpc_subchannel *s; |
| memset(c, 0, sizeof(*c)); |
| c->base.vtable = &connector_vtable; |
| gpr_ref_init(&c->refs, 1); |
| 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, args->server_name)); |
| gpr_free(proxy_name); |
| } |
| args->args = final_args; |
| s = grpc_subchannel_create(exec_ctx, &c->base, args); |
| grpc_connector_unref(exec_ctx, &c->base); |
| grpc_channel_args_destroy(final_args); |
| return s; |
| } |
| |
| static grpc_channel *client_channel_factory_create_channel( |
| grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory, |
| const char *target, grpc_client_channel_type type, |
| grpc_channel_args *args) { |
| client_channel_factory *f = (client_channel_factory *)cc_factory; |
| grpc_channel_args *final_args = grpc_channel_args_merge(args, f->merge_args); |
| grpc_channel *channel = grpc_channel_create(exec_ctx, target, final_args, |
| GRPC_CLIENT_CHANNEL, NULL); |
| grpc_channel_args_destroy(final_args); |
| grpc_resolver *resolver = grpc_resolver_create(target); |
| if (!resolver) { |
| GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, channel, |
| "client_channel_factory_create_channel"); |
| return NULL; |
| } |
| |
| grpc_client_channel_finish_initialization( |
| exec_ctx, grpc_channel_get_channel_stack(channel), resolver, &f->base); |
| GRPC_RESOLVER_UNREF(exec_ctx, resolver, "create_channel"); |
| |
| return channel; |
| } |
| |
| static const grpc_client_channel_factory_vtable client_channel_factory_vtable = |
| {client_channel_factory_ref, client_channel_factory_unref, |
| client_channel_factory_create_subchannel, |
| client_channel_factory_create_channel}; |
| |
| /* Create a client channel: |
| Asynchronously: - resolve target |
| - connect to it (trying alternatives as presented) |
| - perform handshakes */ |
| grpc_channel *grpc_insecure_channel_create(const char *target, |
| const grpc_channel_args *args, |
| void *reserved) { |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| GRPC_API_TRACE( |
| "grpc_insecure_channel_create(target=%p, args=%p, reserved=%p)", 3, |
| (target, args, reserved)); |
| GPR_ASSERT(!reserved); |
| |
| client_channel_factory *f = gpr_malloc(sizeof(*f)); |
| memset(f, 0, sizeof(*f)); |
| f->base.vtable = &client_channel_factory_vtable; |
| gpr_ref_init(&f->refs, 1); |
| f->merge_args = grpc_channel_args_copy(args); |
| |
| grpc_channel *channel = client_channel_factory_create_channel( |
| &exec_ctx, &f->base, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR, NULL); |
| |
| grpc_client_channel_factory_unref(&exec_ctx, &f->base); |
| grpc_exec_ctx_finish(&exec_ctx); |
| |
| return channel != NULL ? channel : grpc_lame_client_channel_create( |
| target, GRPC_STATUS_INTERNAL, |
| "Failed to create client channel"); |
| } |