diff options
Diffstat (limited to 'src/core/lib/surface/channel_create.c')
| -rw-r--r-- | src/core/lib/surface/channel_create.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/src/core/lib/surface/channel_create.c b/src/core/lib/surface/channel_create.c new file mode 100644 index 0000000000..e8777ce816 --- /dev/null +++ b/src/core/lib/surface/channel_create.c @@ -0,0 +1,223 @@ +/* + * + * Copyright 2015-2016, 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 <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/lib/census/grpc_filter.h" +#include "src/core/lib/channel/channel_args.h" +#include "src/core/lib/channel/client_channel.h" +#include "src/core/lib/channel/compress_filter.h" +#include "src/core/lib/channel/http_client_filter.h" +#include "src/core/lib/client_config/resolver_registry.h" +#include "src/core/lib/iomgr/tcp_client.h" +#include "src/core/lib/surface/api_trace.h" +#include "src/core/lib/surface/channel.h" +#include "src/core/lib/transport/chttp2_transport.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; +} 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 */ + gpr_free(c); + } +} + +static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg, + bool success) { + connector_unref(exec_ctx, arg); +} + +static void connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) { + connector *c = arg; + grpc_closure *notify; + 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); + } + c->result->transport = + grpc_create_chttp2_transport(exec_ctx, c->args.channel_args, tcp, 1); + grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, NULL, + 0); + GPR_ASSERT(c->result->transport); + c->result->channel_args = c->args.channel_args; + } else { + memset(c->result, 0, sizeof(*c->result)); + } + notify = c->notify; + c->notify = NULL; + notify->cb(exec_ctx, notify->cb_arg, 1); +} + +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_subchannel_factory base; + gpr_refcount refs; + grpc_channel_args *merge_args; + grpc_channel *master; +} subchannel_factory; + +static void subchannel_factory_ref(grpc_subchannel_factory *scf) { + subchannel_factory *f = (subchannel_factory *)scf; + gpr_ref(&f->refs); +} + +static void subchannel_factory_unref(grpc_exec_ctx *exec_ctx, + grpc_subchannel_factory *scf) { + subchannel_factory *f = (subchannel_factory *)scf; + if (gpr_unref(&f->refs)) { + GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, f->master, "subchannel_factory"); + grpc_channel_args_destroy(f->merge_args); + gpr_free(f); + } +} + +static grpc_subchannel *subchannel_factory_create_subchannel( + grpc_exec_ctx *exec_ctx, grpc_subchannel_factory *scf, + grpc_subchannel_args *args) { + subchannel_factory *f = (subchannel_factory *)scf; + 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); + 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 const grpc_subchannel_factory_vtable subchannel_factory_vtable = { + subchannel_factory_ref, subchannel_factory_unref, + subchannel_factory_create_subchannel}; + +/* 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_channel *channel = NULL; + grpc_resolver *resolver; + subchannel_factory *f; + 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); + + channel = + grpc_channel_create(&exec_ctx, target, args, GRPC_CLIENT_CHANNEL, NULL); + + f = gpr_malloc(sizeof(*f)); + f->base.vtable = &subchannel_factory_vtable; + gpr_ref_init(&f->refs, 1); + f->merge_args = grpc_channel_args_copy(args); + f->master = channel; + GRPC_CHANNEL_INTERNAL_REF(f->master, "subchannel_factory"); + resolver = grpc_resolver_create(target, &f->base); + if (!resolver) { + GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, f->master, "subchannel_factory"); + grpc_subchannel_factory_unref(&exec_ctx, &f->base); + grpc_exec_ctx_finish(&exec_ctx); + return NULL; + } + + grpc_client_channel_set_resolver( + &exec_ctx, grpc_channel_get_channel_stack(channel), resolver); + GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "create"); + grpc_subchannel_factory_unref(&exec_ctx, &f->base); + + grpc_exec_ctx_finish(&exec_ctx); + + return channel; +} |