--- /dev/null
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/port.h"
+
+#ifdef GRPC_POSIX_SOCKET_TCP_CLIENT
+
+#include "src/core/lib/iomgr/tcp_client_posix.h"
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
+
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/gpr/string.h"
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/iomgr/iomgr_posix.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/socket_mutator.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+#include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/iomgr/timer.h"
+#include "src/core/lib/iomgr/unix_sockets_posix.h"
+#include "src/core/lib/slice/slice_internal.h"
+
+extern grpc_core::TraceFlag grpc_tcp_trace;
+
+typedef struct {
+ gpr_mu mu;
+ grpc_fd* fd;
+ grpc_timer alarm;
+ grpc_closure on_alarm;
+ int refs;
+ grpc_closure write_closure;
+ grpc_pollset_set* interested_parties;
+ char* addr_str;
+ grpc_endpoint** ep;
+ grpc_closure* closure;
+ grpc_channel_args* channel_args;
+} async_connect;
+
+static grpc_error* prepare_socket(const grpc_resolved_address* addr, int fd,
+ const grpc_channel_args* channel_args) {
+ grpc_error* err = GRPC_ERROR_NONE;
+
+ GPR_ASSERT(fd >= 0);
+
+ err = grpc_set_socket_nonblocking(fd, 1);
+ if (err != GRPC_ERROR_NONE) goto error;
+ err = grpc_set_socket_cloexec(fd, 1);
+ if (err != GRPC_ERROR_NONE) goto error;
+ if (!grpc_is_unix_socket(addr)) {
+ err = grpc_set_socket_low_latency(fd, 1);
+ if (err != GRPC_ERROR_NONE) goto error;
+ err = grpc_set_socket_reuse_addr(fd, 1);
+ if (err != GRPC_ERROR_NONE) goto error;
+ err = grpc_set_socket_tcp_user_timeout(fd, channel_args,
+ true /* is_client */);
+ if (err != GRPC_ERROR_NONE) goto error;
+ }
+ err = grpc_set_socket_no_sigpipe_if_possible(fd);
+ if (err != GRPC_ERROR_NONE) goto error;
+ if (channel_args) {
+ for (size_t i = 0; i < channel_args->num_args; i++) {
+ if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_SOCKET_MUTATOR)) {
+ GPR_ASSERT(channel_args->args[i].type == GRPC_ARG_POINTER);
+ grpc_socket_mutator* mutator = static_cast<grpc_socket_mutator*>(
+ channel_args->args[i].value.pointer.p);
+ err = grpc_set_socket_with_mutator(fd, mutator);
+ if (err != GRPC_ERROR_NONE) goto error;
+ }
+ }
+ }
+ goto done;
+
+error:
+ if (fd >= 0) {
+ close(fd);
+ }
+done:
+ return err;
+}
+
+static void tc_on_alarm(void* acp, grpc_error* error) {
+ int done;
+ async_connect* ac = static_cast<async_connect*>(acp);
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ const char* str = grpc_error_string(error);
+ gpr_log(GPR_INFO, "CLIENT_CONNECT: %s: on_alarm: error=%s", ac->addr_str,
+ str);
+ }
+ gpr_mu_lock(&ac->mu);
+ if (ac->fd != nullptr) {
+ grpc_fd_shutdown(
+ ac->fd, GRPC_ERROR_CREATE_FROM_STATIC_STRING("connect() timed out"));
+ }
+ done = (--ac->refs == 0);
+ gpr_mu_unlock(&ac->mu);
+ if (done) {
+ gpr_mu_destroy(&ac->mu);
+ gpr_free(ac->addr_str);
+ grpc_channel_args_destroy(ac->channel_args);
+ gpr_free(ac);
+ }
+}
+
+grpc_endpoint* grpc_tcp_client_create_from_fd(
+ grpc_fd* fd, const grpc_channel_args* channel_args, const char* addr_str) {
+ return grpc_tcp_create(fd, channel_args, addr_str);
+}
+
+static void on_writable(void* acp, grpc_error* error) {
+ async_connect* ac = static_cast<async_connect*>(acp);
+ int so_error = 0;
+ socklen_t so_error_size;
+ int err;
+ int done;
+ grpc_endpoint** ep = ac->ep;
+ grpc_closure* closure = ac->closure;
+ grpc_fd* fd;
+
+ GRPC_ERROR_REF(error);
+
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ const char* str = grpc_error_string(error);
+ gpr_log(GPR_INFO, "CLIENT_CONNECT: %s: on_writable: error=%s", ac->addr_str,
+ str);
+ }
+
+ gpr_mu_lock(&ac->mu);
+ GPR_ASSERT(ac->fd);
+ fd = ac->fd;
+ ac->fd = nullptr;
+ gpr_mu_unlock(&ac->mu);
+
+ grpc_timer_cancel(&ac->alarm);
+
+ gpr_mu_lock(&ac->mu);
+ if (error != GRPC_ERROR_NONE) {
+ error =
+ grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR,
+ grpc_slice_from_static_string("Timeout occurred"));
+ goto finish;
+ }
+
+ do {
+ so_error_size = sizeof(so_error);
+ err = getsockopt(grpc_fd_wrapped_fd(fd), SOL_SOCKET, SO_ERROR, &so_error,
+ &so_error_size);
+ } while (err < 0 && errno == EINTR);
+ if (err < 0) {
+ error = GRPC_OS_ERROR(errno, "getsockopt");
+ goto finish;
+ }
+
+ switch (so_error) {
+ case 0:
+ grpc_pollset_set_del_fd(ac->interested_parties, fd);
+ *ep = grpc_tcp_client_create_from_fd(fd, ac->channel_args, ac->addr_str);
+ fd = nullptr;
+ break;
+ case ENOBUFS:
+ /* We will get one of these errors if we have run out of
+ memory in the kernel for the data structures allocated
+ when you connect a socket. If this happens it is very
+ likely that if we wait a little bit then try again the
+ connection will work (since other programs or this
+ program will close their network connections and free up
+ memory). This does _not_ indicate that there is anything
+ wrong with the server we are connecting to, this is a
+ local problem.
+
+ If you are looking at this code, then chances are that
+ your program or another program on the same computer
+ opened too many network connections. The "easy" fix:
+ don't do that! */
+ gpr_log(GPR_ERROR, "kernel out of buffers");
+ gpr_mu_unlock(&ac->mu);
+ grpc_fd_notify_on_write(fd, &ac->write_closure);
+ return;
+ case ECONNREFUSED:
+ /* This error shouldn't happen for anything other than connect(). */
+ error = GRPC_OS_ERROR(so_error, "connect");
+ break;
+ default:
+ /* We don't really know which syscall triggered the problem here,
+ so punt by reporting getsockopt(). */
+ error = GRPC_OS_ERROR(so_error, "getsockopt(SO_ERROR)");
+ break;
+ }
+
+finish:
+ if (fd != nullptr) {
+ grpc_pollset_set_del_fd(ac->interested_parties, fd);
+ grpc_fd_orphan(fd, nullptr, nullptr, "tcp_client_orphan");
+ fd = nullptr;
+ }
+ done = (--ac->refs == 0);
+ // Create a copy of the data from "ac" to be accessed after the unlock, as
+ // "ac" and its contents may be deallocated by the time they are read.
+ const grpc_slice addr_str_slice = grpc_slice_from_copied_string(ac->addr_str);
+ gpr_mu_unlock(&ac->mu);
+ if (error != GRPC_ERROR_NONE) {
+ char* error_descr;
+ grpc_slice str;
+ bool ret = grpc_error_get_str(error, GRPC_ERROR_STR_DESCRIPTION, &str);
+ GPR_ASSERT(ret);
+ char* desc = grpc_slice_to_c_string(str);
+ gpr_asprintf(&error_descr, "Failed to connect to remote host: %s", desc);
+ error = grpc_error_set_str(error, GRPC_ERROR_STR_DESCRIPTION,
+ grpc_slice_from_copied_string(error_descr));
+ gpr_free(error_descr);
+ gpr_free(desc);
+ error = grpc_error_set_str(error, GRPC_ERROR_STR_TARGET_ADDRESS,
+ addr_str_slice /* takes ownership */);
+ } else {
+ grpc_slice_unref_internal(addr_str_slice);
+ }
+ if (done) {
+ // This is safe even outside the lock, because "done", the sentinel, is
+ // populated *inside* the lock.
+ gpr_mu_destroy(&ac->mu);
+ gpr_free(ac->addr_str);
+ grpc_channel_args_destroy(ac->channel_args);
+ gpr_free(ac);
+ }
+ GRPC_CLOSURE_SCHED(closure, error);
+}
+
+grpc_error* grpc_tcp_client_prepare_fd(const grpc_channel_args* channel_args,
+ const grpc_resolved_address* addr,
+ grpc_resolved_address* mapped_addr,
+ grpc_fd** fdobj) {
+ grpc_dualstack_mode dsmode;
+ int fd;
+ grpc_error* error;
+ char* name;
+ char* addr_str;
+ *fdobj = nullptr;
+ /* Use dualstack sockets where available. Set mapped to v6 or v4 mapped to
+ v6. */
+ if (!grpc_sockaddr_to_v4mapped(addr, mapped_addr)) {
+ /* addr is v4 mapped to v6 or v6. */
+ memcpy(mapped_addr, addr, sizeof(*mapped_addr));
+ }
+ error =
+ grpc_create_dualstack_socket(mapped_addr, SOCK_STREAM, 0, &dsmode, &fd);
+ if (error != GRPC_ERROR_NONE) {
+ return error;
+ }
+ if (dsmode == GRPC_DSMODE_IPV4) {
+ /* Original addr is either v4 or v4 mapped to v6. Set mapped_addr to v4. */
+ if (!grpc_sockaddr_is_v4mapped(addr, mapped_addr)) {
+ memcpy(mapped_addr, addr, sizeof(*mapped_addr));
+ }
+ }
+ if ((error = prepare_socket(mapped_addr, fd, channel_args)) !=
+ GRPC_ERROR_NONE) {
+ return error;
+ }
+ addr_str = grpc_sockaddr_to_uri(mapped_addr);
+ gpr_asprintf(&name, "tcp-client:%s", addr_str);
+ *fdobj = grpc_fd_create(fd, name, true);
+ gpr_free(name);
+ gpr_free(addr_str);
+ return GRPC_ERROR_NONE;
+}
+
+void grpc_tcp_client_create_from_prepared_fd(
+ grpc_pollset_set* interested_parties, grpc_closure* closure, grpc_fd* fdobj,
+ const grpc_channel_args* channel_args, const grpc_resolved_address* addr,
+ grpc_millis deadline, grpc_endpoint** ep) {
+ const int fd = grpc_fd_wrapped_fd(fdobj);
+ int err;
+ async_connect* ac;
+ do {
+ err = connect(fd, reinterpret_cast<const grpc_sockaddr*>(addr->addr),
+ addr->len);
+ } while (err < 0 && errno == EINTR);
+ if (err >= 0) {
+ char* addr_str = grpc_sockaddr_to_uri(addr);
+ *ep = grpc_tcp_client_create_from_fd(fdobj, channel_args, addr_str);
+ gpr_free(addr_str);
+ GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
+ return;
+ }
+ if (errno != EWOULDBLOCK && errno != EINPROGRESS) {
+ grpc_fd_orphan(fdobj, nullptr, nullptr, "tcp_client_connect_error");
+ GRPC_CLOSURE_SCHED(closure, GRPC_OS_ERROR(errno, "connect"));
+ return;
+ }
+
+ grpc_pollset_set_add_fd(interested_parties, fdobj);
+
+ ac = static_cast<async_connect*>(gpr_malloc(sizeof(async_connect)));
+ ac->closure = closure;
+ ac->ep = ep;
+ ac->fd = fdobj;
+ ac->interested_parties = interested_parties;
+ ac->addr_str = grpc_sockaddr_to_uri(addr);
+ gpr_mu_init(&ac->mu);
+ ac->refs = 2;
+ GRPC_CLOSURE_INIT(&ac->write_closure, on_writable, ac,
+ grpc_schedule_on_exec_ctx);
+ ac->channel_args = grpc_channel_args_copy(channel_args);
+
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
+ gpr_log(GPR_INFO, "CLIENT_CONNECT: %s: asynchronously connecting fd %p",
+ ac->addr_str, fdobj);
+ }
+
+ gpr_mu_lock(&ac->mu);
+ GRPC_CLOSURE_INIT(&ac->on_alarm, tc_on_alarm, ac, grpc_schedule_on_exec_ctx);
+ grpc_timer_init(&ac->alarm, deadline, &ac->on_alarm);
+ grpc_fd_notify_on_write(ac->fd, &ac->write_closure);
+ gpr_mu_unlock(&ac->mu);
+}
+
+static void tcp_connect(grpc_closure* closure, grpc_endpoint** ep,
+ grpc_pollset_set* interested_parties,
+ const grpc_channel_args* channel_args,
+ const grpc_resolved_address* addr,
+ grpc_millis deadline) {
+ grpc_resolved_address mapped_addr;
+ grpc_fd* fdobj = nullptr;
+ grpc_error* error;
+ *ep = nullptr;
+ if ((error = grpc_tcp_client_prepare_fd(channel_args, addr, &mapped_addr,
+ &fdobj)) != GRPC_ERROR_NONE) {
+ GRPC_CLOSURE_SCHED(closure, error);
+ return;
+ }
+ grpc_tcp_client_create_from_prepared_fd(interested_parties, closure, fdobj,
+ channel_args, &mapped_addr, deadline,
+ ep);
+}
+
+grpc_tcp_client_vtable grpc_posix_tcp_client_vtable = {tcp_connect};
+#endif
git://repos.xcallymotion.com / motion2.git / blobdiff