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/*
*
* 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 <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.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/http_server_filter.h"
#include "src/core/lib/iomgr/resolve_address.h"
#include "src/core/lib/iomgr/tcp_server.h"
#include "src/core/lib/surface/api_trace.h"
#include "src/core/lib/surface/server.h"
typedef struct server_connect_state {
grpc_server *server;
grpc_pollset *accepting_pollset;
grpc_tcp_server_acceptor *acceptor;
grpc_handshake_manager *handshake_mgr;
} server_connect_state;
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) {
server_connect_state *state = user_data;
if (error != GRPC_ERROR_NONE) {
const char *error_str = grpc_error_string(error);
gpr_log(GPR_ERROR, "Handshaking failed: %s", error_str);
grpc_error_free_string(error_str);
GRPC_ERROR_UNREF(error);
grpc_handshake_manager_shutdown(exec_ctx, state->handshake_mgr);
gpr_free(read_buffer);
} else {
// Beware that the call to grpc_create_chttp2_transport() has to happen
// before grpc_tcp_server_destroy(). This is fine here, but similar code
// asynchronously doing a handshake instead of calling
// grpc_tcp_server_start() (as in server_secure_chttp2.c) needs to add
// synchronization to avoid this case.
grpc_transport *transport =
grpc_create_chttp2_transport(exec_ctx, args, endpoint, 0);
grpc_server_setup_transport(exec_ctx, state->server, transport,
state->accepting_pollset,
grpc_server_get_channel_args(state->server));
grpc_chttp2_transport_start_reading(exec_ctx, transport, read_buffer);
}
// Clean up.
grpc_channel_args_destroy(args);
grpc_handshake_manager_destroy(exec_ctx, state->handshake_mgr);
gpr_free(state);
}
static void on_accept(grpc_exec_ctx *exec_ctx, void *server, grpc_endpoint *tcp,
grpc_pollset *accepting_pollset,
grpc_tcp_server_acceptor *acceptor) {
server_connect_state *state = gpr_malloc(sizeof(server_connect_state));
state->server = server;
state->accepting_pollset = accepting_pollset;
state->acceptor = acceptor;
state->handshake_mgr = grpc_handshake_manager_create();
// 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, state->handshake_mgr, tcp, grpc_server_get_channel_args(server),
deadline, acceptor, on_handshake_done, state);
}
/* Server callback: start listening on our ports */
static void start(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
grpc_pollset **pollsets, size_t pollset_count) {
grpc_tcp_server *tcp = tcpp;
grpc_tcp_server_start(exec_ctx, tcp, pollsets, pollset_count, on_accept,
server);
}
/* Server callback: destroy the tcp listener (so we don't generate further
callbacks) */
static void destroy(grpc_exec_ctx *exec_ctx, grpc_server *server, void *tcpp,
grpc_closure *destroy_done) {
grpc_tcp_server *tcp = tcpp;
grpc_tcp_server_shutdown_listeners(exec_ctx, tcp);
grpc_tcp_server_unref(exec_ctx, tcp);
grpc_exec_ctx_sched(exec_ctx, destroy_done, GRPC_ERROR_NONE, NULL);
}
int grpc_server_add_insecure_http2_port(grpc_server *server, const char *addr) {
grpc_resolved_addresses *resolved = NULL;
grpc_tcp_server *tcp = NULL;
size_t i;
size_t count = 0;
int port_num = -1;
int port_temp;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_error *err = GRPC_ERROR_NONE;
GRPC_API_TRACE("grpc_server_add_insecure_http2_port(server=%p, addr=%s)", 2,
(server, addr));
grpc_error **errors = NULL;
err = grpc_blocking_resolve_address(addr, "https", &resolved);
if (err != GRPC_ERROR_NONE) {
goto error;
}
err =
grpc_tcp_server_create(NULL, grpc_server_get_channel_args(server), &tcp);
if (err != GRPC_ERROR_NONE) {
goto error;
}
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, &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);
grpc_error_free_string(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, tcp, start, destroy);
goto done;
/* Error path: cleanup and return */
error:
GPR_ASSERT(err != GRPC_ERROR_NONE);
if (resolved) {
grpc_resolved_addresses_destroy(resolved);
}
if (tcp) {
grpc_tcp_server_unref(&exec_ctx, tcp);
}
port_num = 0;
const char *msg = grpc_error_string(err);
gpr_log(GPR_ERROR, "%s", msg);
grpc_error_free_string(msg);
GRPC_ERROR_UNREF(err);
done:
grpc_exec_ctx_finish(&exec_ctx);
if (errors != NULL) {
for (i = 0; i < naddrs; i++) {
GRPC_ERROR_UNREF(errors[i]);
}
}
gpr_free(errors);
return port_num;
}
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