| /* |
| * |
| * 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/census/grpc_filter.h" |
| #include "src/core/channel/channel_args.h" |
| #include "src/core/channel/client_channel.h" |
| #include "src/core/channel/compress_filter.h" |
| #include "src/core/channel/http_client_filter.h" |
| #include "src/core/client_config/resolver_registry.h" |
| #include "src/core/iomgr/tcp_client.h" |
| #include "src/core/security/auth_filters.h" |
| #include "src/core/security/credentials.h" |
| #include "src/core/security/security_context.h" |
| #include "src/core/surface/api_trace.h" |
| #include "src/core/surface/channel.h" |
| #include "src/core/transport/chttp2_transport.h" |
| #include "src/core/tsi/transport_security_interface.h" |
| |
| typedef struct { |
| grpc_connector base; |
| gpr_refcount refs; |
| |
| grpc_channel_security_connector *security_connector; |
| |
| grpc_closure *notify; |
| grpc_connect_in_args args; |
| grpc_connect_out_args *result; |
| grpc_closure initial_string_sent; |
| gpr_slice_buffer initial_string_buffer; |
| |
| gpr_mu mu; |
| grpc_endpoint *connecting_endpoint; |
| grpc_endpoint *newly_connecting_endpoint; |
| |
| grpc_closure connected_closure; |
| } 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_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *arg, |
| grpc_security_status status, |
| grpc_endpoint *secure_endpoint, |
| grpc_auth_context *auth_context) { |
| connector *c = arg; |
| grpc_closure *notify; |
| grpc_channel_args *args_copy = NULL; |
| gpr_mu_lock(&c->mu); |
| if (c->connecting_endpoint == NULL) { |
| memset(c->result, 0, sizeof(*c->result)); |
| gpr_mu_unlock(&c->mu); |
| } else if (status != GRPC_SECURITY_OK) { |
| gpr_log(GPR_ERROR, "Secure handshake failed with error %d.", status); |
| memset(c->result, 0, sizeof(*c->result)); |
| c->connecting_endpoint = NULL; |
| gpr_mu_unlock(&c->mu); |
| } else { |
| grpc_arg auth_context_arg; |
| c->connecting_endpoint = NULL; |
| gpr_mu_unlock(&c->mu); |
| c->result->transport = grpc_create_chttp2_transport( |
| exec_ctx, c->args.channel_args, secure_endpoint, 1); |
| grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, NULL, |
| 0); |
| auth_context_arg = grpc_auth_context_to_arg(auth_context); |
| args_copy = grpc_channel_args_copy_and_add(c->args.channel_args, |
| &auth_context_arg, 1); |
| c->result->channel_args = args_copy; |
| c->result->filters = gpr_malloc(sizeof(grpc_channel_filter *) * 2); |
| c->result->filters[0] = &grpc_http_client_filter; |
| c->result->filters[1] = &grpc_client_auth_filter; |
| c->result->num_filters = 2; |
| } |
| notify = c->notify; |
| c->notify = NULL; |
| /* look at c->args which are connector args. */ |
| notify->cb(exec_ctx, notify->cb_arg, 1); |
| if (args_copy != NULL) grpc_channel_args_destroy(args_copy); |
| } |
| |
| static void on_initial_connect_string_sent(grpc_exec_ctx *exec_ctx, void *arg, |
| bool success) { |
| connector *c = arg; |
| grpc_security_connector_do_handshake(exec_ctx, &c->security_connector->base, |
| c->connecting_endpoint, |
| on_secure_handshake_done, c); |
| } |
| |
| static void connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) { |
| connector *c = arg; |
| grpc_closure *notify; |
| grpc_endpoint *tcp = c->newly_connecting_endpoint; |
| if (tcp != NULL) { |
| gpr_mu_lock(&c->mu); |
| GPR_ASSERT(c->connecting_endpoint == NULL); |
| c->connecting_endpoint = tcp; |
| gpr_mu_unlock(&c->mu); |
| 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); |
| grpc_endpoint_write(exec_ctx, tcp, &c->initial_string_buffer, |
| &c->initial_string_sent); |
| } else { |
| grpc_security_connector_do_handshake(exec_ctx, |
| &c->security_connector->base, tcp, |
| on_secure_handshake_done, c); |
| } |
| } 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) { |
| connector *c = (connector *)con; |
| grpc_endpoint *ep; |
| gpr_mu_lock(&c->mu); |
| ep = c->connecting_endpoint; |
| c->connecting_endpoint = NULL; |
| gpr_mu_unlock(&c->mu); |
| if (ep) { |
| grpc_endpoint_shutdown(exec_ctx, ep); |
| } |
| } |
| |
| 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; |
| gpr_mu_lock(&c->mu); |
| GPR_ASSERT(c->connecting_endpoint == NULL); |
| gpr_mu_unlock(&c->mu); |
| grpc_closure_init(&c->connected_closure, connected, c); |
| grpc_tcp_client_connect( |
| exec_ctx, &c->connected_closure, &c->newly_connecting_endpoint, |
| 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_security_connector *security_connector; |
| 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_SECURITY_CONNECTOR_UNREF(&f->security_connector->base, |
| "subchannel_factory"); |
| 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; |
| c->security_connector = f->security_connector; |
| gpr_mu_init(&c->mu); |
| 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 secure client channel: |
| Asynchronously: - resolve target |
| - connect to it (trying alternatives as presented) |
| - perform handshakes */ |
| grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds, |
| const char *target, |
| const grpc_channel_args *args, |
| void *reserved) { |
| grpc_channel *channel; |
| grpc_arg connector_arg; |
| grpc_channel_args *args_copy; |
| grpc_channel_args *new_args_from_connector; |
| grpc_channel_security_connector *security_connector; |
| grpc_resolver *resolver; |
| subchannel_factory *f; |
| #define MAX_FILTERS 3 |
| const grpc_channel_filter *filters[MAX_FILTERS]; |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| size_t n = 0; |
| |
| GRPC_API_TRACE( |
| "grpc_secure_channel_create(creds=%p, target=%s, args=%p, " |
| "reserved=%p)", |
| 4, (creds, target, args, reserved)); |
| GPR_ASSERT(reserved == NULL); |
| |
| if (grpc_find_security_connector_in_args(args) != NULL) { |
| gpr_log(GPR_ERROR, "Cannot set security context in channel args."); |
| grpc_exec_ctx_finish(&exec_ctx); |
| return grpc_lame_client_channel_create( |
| target, GRPC_STATUS_INVALID_ARGUMENT, |
| "Security connector exists in channel args."); |
| } |
| |
| if (grpc_channel_credentials_create_security_connector( |
| creds, target, args, &security_connector, &new_args_from_connector) != |
| GRPC_SECURITY_OK) { |
| grpc_exec_ctx_finish(&exec_ctx); |
| return grpc_lame_client_channel_create( |
| target, GRPC_STATUS_INVALID_ARGUMENT, |
| "Failed to create security connector."); |
| } |
| |
| connector_arg = grpc_security_connector_to_arg(&security_connector->base); |
| args_copy = grpc_channel_args_copy_and_add( |
| new_args_from_connector != NULL ? new_args_from_connector : args, |
| &connector_arg, 1); |
| if (grpc_channel_args_is_census_enabled(args)) { |
| filters[n++] = &grpc_client_census_filter; |
| } |
| filters[n++] = &grpc_compress_filter; |
| filters[n++] = &grpc_client_channel_filter; |
| GPR_ASSERT(n <= MAX_FILTERS); |
| |
| channel = grpc_channel_create_from_filters(&exec_ctx, target, filters, n, |
| args_copy, 1); |
| |
| f = gpr_malloc(sizeof(*f)); |
| f->base.vtable = &subchannel_factory_vtable; |
| gpr_ref_init(&f->refs, 1); |
| GRPC_SECURITY_CONNECTOR_REF(&security_connector->base, "subchannel_factory"); |
| f->security_connector = security_connector; |
| f->merge_args = grpc_channel_args_copy(args_copy); |
| f->master = channel; |
| GRPC_CHANNEL_INTERNAL_REF(channel, "subchannel_factory"); |
| resolver = grpc_resolver_create(target, &f->base); |
| if (resolver) { |
| 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_SECURITY_CONNECTOR_UNREF(&security_connector->base, "channel_create"); |
| grpc_channel_args_destroy(args_copy); |
| if (new_args_from_connector != NULL) { |
| grpc_channel_args_destroy(new_args_from_connector); |
| } |
| |
| if (!resolver) { |
| GRPC_CHANNEL_INTERNAL_UNREF(&exec_ctx, channel, "subchannel_factory"); |
| channel = NULL; |
| } |
| grpc_exec_ctx_finish(&exec_ctx); |
| |
| return channel; |
| } |