| /* |
| * |
| * 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/server/chttp2_server.h" |
| |
| #include <grpc/grpc.h> |
| |
| #include <string.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| #include <grpc/support/sync.h> |
| #include <grpc/support/useful.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/channel/handshaker_registry.h" |
| #include "src/core/lib/channel/http_server_filter.h" |
| #include "src/core/lib/iomgr/endpoint.h" |
| #include "src/core/lib/iomgr/resolve_address.h" |
| #include "src/core/lib/iomgr/tcp_server.h" |
| #include "src/core/lib/slice/slice_internal.h" |
| #include "src/core/lib/surface/api_trace.h" |
| #include "src/core/lib/surface/server.h" |
| |
| typedef struct pending_handshake_manager_node { |
| grpc_handshake_manager *handshake_mgr; |
| struct pending_handshake_manager_node *next; |
| } pending_handshake_manager_node; |
| |
| typedef struct { |
| grpc_server *server; |
| grpc_tcp_server *tcp_server; |
| grpc_channel_args *args; |
| gpr_mu mu; |
| bool shutdown; |
| grpc_closure tcp_server_shutdown_complete; |
| grpc_closure *server_destroy_listener_done; |
| pending_handshake_manager_node *pending_handshake_mgrs; |
| } server_state; |
| |
| typedef struct { |
| server_state *server_state; |
| grpc_pollset *accepting_pollset; |
| grpc_tcp_server_acceptor *acceptor; |
| grpc_handshake_manager *handshake_mgr; |
| } server_connection_state; |
| |
| static void pending_handshake_manager_add_locked( |
| server_state *state, grpc_handshake_manager *handshake_mgr) { |
| pending_handshake_manager_node *node = gpr_malloc(sizeof(*node)); |
| node->handshake_mgr = handshake_mgr; |
| node->next = state->pending_handshake_mgrs; |
| state->pending_handshake_mgrs = node; |
| } |
| |
| static void pending_handshake_manager_remove_locked( |
| server_state *state, grpc_handshake_manager *handshake_mgr) { |
| pending_handshake_manager_node **prev_node = &state->pending_handshake_mgrs; |
| for (pending_handshake_manager_node *node = state->pending_handshake_mgrs; |
| node != NULL; node = node->next) { |
| if (node->handshake_mgr == handshake_mgr) { |
| *prev_node = node->next; |
| gpr_free(node); |
| break; |
| } |
| prev_node = &node->next; |
| } |
| } |
| |
| static void pending_handshake_manager_shutdown_locked(grpc_exec_ctx *exec_ctx, |
| server_state *state, |
| grpc_error *why) { |
| pending_handshake_manager_node *prev_node = NULL; |
| for (pending_handshake_manager_node *node = state->pending_handshake_mgrs; |
| node != NULL; node = node->next) { |
| grpc_handshake_manager_shutdown(exec_ctx, node->handshake_mgr, |
| GRPC_ERROR_REF(why)); |
| gpr_free(prev_node); |
| prev_node = node; |
| } |
| gpr_free(prev_node); |
| state->pending_handshake_mgrs = NULL; |
| GRPC_ERROR_UNREF(why); |
| } |
| |
| static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg, |
| grpc_error *error) { |
| grpc_handshaker_args *args = arg; |
| server_connection_state *connection_state = args->user_data; |
| gpr_mu_lock(&connection_state->server_state->mu); |
| if (error != GRPC_ERROR_NONE || connection_state->server_state->shutdown) { |
| const char *error_str = grpc_error_string(error); |
| gpr_log(GPR_ERROR, "Handshaking failed: %s", error_str); |
| |
| if (error == GRPC_ERROR_NONE && args->endpoint != NULL) { |
| // 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_ERROR_NONE); |
| grpc_endpoint_destroy(exec_ctx, args->endpoint); |
| grpc_channel_args_destroy(exec_ctx, args->args); |
| grpc_slice_buffer_destroy_internal(exec_ctx, args->read_buffer); |
| gpr_free(args->read_buffer); |
| } |
| } else { |
| // If the handshaking succeeded but there is no endpoint, then the |
| // handshaker may have handed off the connection to some external |
| // code, so we can just clean up here without creating a transport. |
| if (args->endpoint != NULL) { |
| grpc_transport *transport = |
| grpc_create_chttp2_transport(exec_ctx, args->args, args->endpoint, 0); |
| grpc_server_setup_transport( |
| exec_ctx, connection_state->server_state->server, transport, |
| connection_state->accepting_pollset, args->args); |
| grpc_chttp2_transport_start_reading(exec_ctx, transport, |
| args->read_buffer); |
| grpc_channel_args_destroy(exec_ctx, args->args); |
| } |
| } |
| pending_handshake_manager_remove_locked(connection_state->server_state, |
| connection_state->handshake_mgr); |
| gpr_mu_unlock(&connection_state->server_state->mu); |
| grpc_handshake_manager_destroy(exec_ctx, connection_state->handshake_mgr); |
| grpc_tcp_server_unref(exec_ctx, connection_state->server_state->tcp_server); |
| gpr_free(connection_state->acceptor); |
| gpr_free(connection_state); |
| } |
| |
| static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp, |
| grpc_pollset *accepting_pollset, |
| grpc_tcp_server_acceptor *acceptor) { |
| server_state *state = arg; |
| gpr_mu_lock(&state->mu); |
| if (state->shutdown) { |
| gpr_mu_unlock(&state->mu); |
| grpc_endpoint_destroy(exec_ctx, tcp); |
| gpr_free(acceptor); |
| return; |
| } |
| grpc_handshake_manager *handshake_mgr = grpc_handshake_manager_create(); |
| pending_handshake_manager_add_locked(state, handshake_mgr); |
| gpr_mu_unlock(&state->mu); |
| grpc_tcp_server_ref(state->tcp_server); |
| server_connection_state *connection_state = |
| gpr_malloc(sizeof(*connection_state)); |
| connection_state->server_state = state; |
| connection_state->accepting_pollset = accepting_pollset; |
| connection_state->acceptor = acceptor; |
| connection_state->handshake_mgr = handshake_mgr; |
| grpc_handshakers_add(exec_ctx, HANDSHAKER_SERVER, state->args, |
| connection_state->handshake_mgr); |
| // TODO(roth): We should really get this timeout value from channel |
| // args instead of hard-coding it. |
| const gpr_timespec deadline = gpr_time_add( |
| gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(120, GPR_TIMESPAN)); |
| grpc_handshake_manager_do_handshake(exec_ctx, connection_state->handshake_mgr, |
| tcp, state->args, deadline, acceptor, |
| on_handshake_done, connection_state); |
| } |
| |
| /* Server callback: start listening on our ports */ |
| static void server_start_listener(grpc_exec_ctx *exec_ctx, grpc_server *server, |
| void *arg, grpc_pollset **pollsets, |
| size_t pollset_count) { |
| server_state *state = arg; |
| gpr_mu_lock(&state->mu); |
| state->shutdown = false; |
| gpr_mu_unlock(&state->mu); |
| grpc_tcp_server_start(exec_ctx, state->tcp_server, pollsets, pollset_count, |
| on_accept, state); |
| } |
| |
| static void tcp_server_shutdown_complete(grpc_exec_ctx *exec_ctx, void *arg, |
| grpc_error *error) { |
| server_state *state = arg; |
| /* ensure all threads have unlocked */ |
| gpr_mu_lock(&state->mu); |
| grpc_closure *destroy_done = state->server_destroy_listener_done; |
| GPR_ASSERT(state->shutdown); |
| pending_handshake_manager_shutdown_locked(exec_ctx, state, |
| GRPC_ERROR_REF(error)); |
| gpr_mu_unlock(&state->mu); |
| // Flush queued work before destroying handshaker factory, since that |
| // may do a synchronous unref. |
| grpc_exec_ctx_flush(exec_ctx); |
| if (destroy_done != NULL) { |
| destroy_done->cb(exec_ctx, destroy_done->cb_arg, GRPC_ERROR_REF(error)); |
| grpc_exec_ctx_flush(exec_ctx); |
| } |
| grpc_channel_args_destroy(exec_ctx, state->args); |
| gpr_mu_destroy(&state->mu); |
| gpr_free(state); |
| } |
| |
| /* Server callback: destroy the tcp listener (so we don't generate further |
| callbacks) */ |
| static void server_destroy_listener(grpc_exec_ctx *exec_ctx, |
| grpc_server *server, void *arg, |
| grpc_closure *destroy_done) { |
| server_state *state = arg; |
| gpr_mu_lock(&state->mu); |
| state->shutdown = true; |
| state->server_destroy_listener_done = destroy_done; |
| grpc_tcp_server *tcp_server = state->tcp_server; |
| gpr_mu_unlock(&state->mu); |
| grpc_tcp_server_shutdown_listeners(exec_ctx, tcp_server); |
| grpc_tcp_server_unref(exec_ctx, tcp_server); |
| } |
| |
| grpc_error *grpc_chttp2_server_add_port(grpc_exec_ctx *exec_ctx, |
| grpc_server *server, const char *addr, |
| grpc_channel_args *args, |
| int *port_num) { |
| grpc_resolved_addresses *resolved = NULL; |
| grpc_tcp_server *tcp_server = NULL; |
| size_t i; |
| size_t count = 0; |
| int port_temp; |
| grpc_error *err = GRPC_ERROR_NONE; |
| server_state *state = NULL; |
| grpc_error **errors = NULL; |
| |
| *port_num = -1; |
| |
| /* resolve address */ |
| err = grpc_blocking_resolve_address(addr, "https", &resolved); |
| if (err != GRPC_ERROR_NONE) { |
| goto error; |
| } |
| state = gpr_malloc(sizeof(*state)); |
| memset(state, 0, sizeof(*state)); |
| grpc_closure_init(&state->tcp_server_shutdown_complete, |
| tcp_server_shutdown_complete, state, |
| grpc_schedule_on_exec_ctx); |
| err = grpc_tcp_server_create(exec_ctx, &state->tcp_server_shutdown_complete, |
| args, &tcp_server); |
| if (err != GRPC_ERROR_NONE) { |
| goto error; |
| } |
| |
| state->server = server; |
| state->tcp_server = tcp_server; |
| state->args = args; |
| state->shutdown = true; |
| gpr_mu_init(&state->mu); |
| |
| const size_t naddrs = resolved->naddrs; |
| errors = gpr_malloc(sizeof(*errors) * naddrs); |
| for (i = 0; i < naddrs; i++) { |
| errors[i] = |
| grpc_tcp_server_add_port(tcp_server, &resolved->addrs[i], &port_temp); |
| if (errors[i] == GRPC_ERROR_NONE) { |
| if (*port_num == -1) { |
| *port_num = port_temp; |
| } else { |
| GPR_ASSERT(*port_num == port_temp); |
| } |
| count++; |
| } |
| } |
| if (count == 0) { |
| char *msg; |
| gpr_asprintf(&msg, "No address added out of total %" PRIuPTR " resolved", |
| naddrs); |
| err = GRPC_ERROR_CREATE_REFERENCING(msg, errors, naddrs); |
| gpr_free(msg); |
| goto error; |
| } else if (count != naddrs) { |
| char *msg; |
| gpr_asprintf(&msg, "Only %" PRIuPTR |
| " addresses added out of total %" PRIuPTR " resolved", |
| count, naddrs); |
| err = GRPC_ERROR_CREATE_REFERENCING(msg, errors, naddrs); |
| gpr_free(msg); |
| |
| const char *warning_message = grpc_error_string(err); |
| gpr_log(GPR_INFO, "WARNING: %s", warning_message); |
| |
| /* we managed to bind some addresses: continue */ |
| } |
| grpc_resolved_addresses_destroy(resolved); |
| |
| /* Register with the server only upon success */ |
| grpc_server_add_listener(exec_ctx, server, state, server_start_listener, |
| server_destroy_listener); |
| goto done; |
| |
| /* Error path: cleanup and return */ |
| error: |
| GPR_ASSERT(err != GRPC_ERROR_NONE); |
| if (resolved) { |
| grpc_resolved_addresses_destroy(resolved); |
| } |
| if (tcp_server) { |
| grpc_tcp_server_unref(exec_ctx, tcp_server); |
| } else { |
| grpc_channel_args_destroy(exec_ctx, args); |
| gpr_free(state); |
| } |
| *port_num = 0; |
| |
| done: |
| if (errors != NULL) { |
| for (i = 0; i < naddrs; i++) { |
| GRPC_ERROR_UNREF(errors[i]); |
| } |
| gpr_free(errors); |
| } |
| return err; |
| } |