| /* |
| * |
| * 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 "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/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; |
| |
| gpr_mu mu; |
| grpc_endpoint *connecting_endpoint; |
| grpc_endpoint *newly_connecting_endpoint; |
| |
| grpc_closure connected_closure; |
| |
| grpc_mdctx *mdctx; |
| } 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)) |
| { |
| grpc_mdctx_unref (c->mdctx); |
| gpr_free (c); |
| } |
| } |
| |
| static void |
| on_secure_handshake_done (grpc_exec_ctx * exec_ctx, void *arg, grpc_security_status status, grpc_endpoint * wrapped_endpoint, grpc_endpoint * secure_endpoint) |
| { |
| connector *c = arg; |
| grpc_closure *notify; |
| 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_ASSERT (c->connecting_endpoint == wrapped_endpoint); |
| 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 |
| { |
| GPR_ASSERT (c->connecting_endpoint == wrapped_endpoint); |
| c->connecting_endpoint = NULL; |
| gpr_mu_unlock (&c->mu); |
| c->result->transport = grpc_create_chttp2_transport (exec_ctx, c->args.channel_args, secure_endpoint, c->mdctx, 1); |
| grpc_chttp2_transport_start_reading (exec_ctx, c->result->transport, NULL, 0); |
| 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; |
| notify->cb (exec_ctx, notify->cb_arg, 1); |
| } |
| |
| static void |
| connected (grpc_exec_ctx * exec_ctx, void *arg, int 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); |
| 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_mdctx *mdctx; |
| 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); |
| grpc_mdctx_unref (f->mdctx); |
| 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; |
| c->mdctx = f->mdctx; |
| grpc_mdctx_ref (c->mdctx); |
| gpr_ref_init (&c->refs, 1); |
| args->args = final_args; |
| args->master = f->master; |
| args->mdctx = f->mdctx; |
| s = grpc_subchannel_create (&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_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 *connector; |
| grpc_mdctx *mdctx; |
| grpc_resolver *resolver; |
| subchannel_factory *f; |
| #define MAX_FILTERS 3 |
| const grpc_channel_filter *filters[MAX_FILTERS]; |
| grpc_closure_list closure_list = GRPC_CLOSURE_LIST_INIT; |
| size_t n = 0; |
| |
| GPR_ASSERT (reserved == NULL); |
| if (grpc_find_security_connector_in_args (args) != NULL) |
| { |
| gpr_log (GPR_ERROR, "Cannot set security context in channel args."); |
| return grpc_lame_client_channel_create (target, GRPC_STATUS_INVALID_ARGUMENT, "Security connector exists in channel args."); |
| } |
| |
| if (grpc_credentials_create_security_connector (creds, target, args, NULL, &connector, &new_args_from_connector) != GRPC_SECURITY_OK) |
| { |
| return grpc_lame_client_channel_create (target, GRPC_STATUS_INVALID_ARGUMENT, "Failed to create security connector."); |
| } |
| mdctx = grpc_mdctx_create (); |
| |
| connector_arg = grpc_security_connector_to_arg (&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 (target, filters, n, args_copy, mdctx, 1, &closure_list); |
| |
| f = gpr_malloc (sizeof (*f)); |
| f->base.vtable = &subchannel_factory_vtable; |
| gpr_ref_init (&f->refs, 1); |
| grpc_mdctx_ref (mdctx); |
| f->mdctx = mdctx; |
| GRPC_SECURITY_CONNECTOR_REF (&connector->base, "subchannel_factory"); |
| f->security_connector = 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) |
| { |
| return NULL; |
| } |
| |
| grpc_client_channel_set_resolver (grpc_channel_get_channel_stack (channel), resolver, &closure_list); |
| GRPC_RESOLVER_UNREF (resolver, "create", &closure_list); |
| grpc_subchannel_factory_unref (&f->base, &closure_list); |
| GRPC_SECURITY_CONNECTOR_UNREF (&connector->base, "channel_create"); |
| |
| grpc_channel_args_destroy (args_copy); |
| if (new_args_from_connector != NULL) |
| { |
| grpc_channel_args_destroy (new_args_from_connector); |
| } |
| |
| grpc_closure_list_run (&closure_list); |
| |
| return channel; |
| } |