1 files changed, 151 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/tcp_client_custom.cc b/src/core/lib/iomgr/tcp_client_custom.cc
new file mode 100644
index 0000000000..55632a55a1
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_client_custom.cc
@@ -0,0 +1,151 @@
+/*
+ *
+ * Copyright 2018 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"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/iomgr/error.h"
+#include "src/core/lib/iomgr/iomgr_custom.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+#include "src/core/lib/iomgr/tcp_client.h"
+#include "src/core/lib/iomgr/tcp_custom.h"
+#include "src/core/lib/iomgr/timer.h"
+
+extern grpc_core::TraceFlag grpc_tcp_trace;
+extern grpc_socket_vtable* grpc_custom_socket_vtable;
+
+struct grpc_custom_tcp_connect {
+  grpc_custom_socket* socket;
+  grpc_timer alarm;
+  grpc_closure on_alarm;
+  grpc_closure* closure;
+  grpc_endpoint** endpoint;
+  int refs;
+  char* addr_name;
+  grpc_resource_quota* resource_quota;
+};
+
+static void custom_tcp_connect_cleanup(grpc_custom_tcp_connect* connect) {
+  grpc_custom_socket* socket = connect->socket;
+  grpc_resource_quota_unref_internal(connect->resource_quota);
+  gpr_free(connect->addr_name);
+  gpr_free(connect);
+  socket->refs--;
+  if (socket->refs == 0) {
+    grpc_custom_socket_vtable->destroy(socket);
+    gpr_free(socket);
+  }
+}
+
+static void custom_close_callback(grpc_custom_socket* socket) {}
+
+static void on_alarm(void* acp, grpc_error* error) {
+  int done;
+  grpc_custom_socket* socket = (grpc_custom_socket*)acp;
+  grpc_custom_tcp_connect* connect = socket->connector;
+  if (grpc_tcp_trace.enabled()) {
+    const char* str = grpc_error_string(error);
+    gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: on_alarm: error=%s",
+            connect->addr_name, str);
+  }
+  if (error == GRPC_ERROR_NONE) {
+    /* error == NONE implies that the timer ran out, and wasn't cancelled. If
+       it was cancelled, then the handler that cancelled it also should close
+       the handle, if applicable */
+    grpc_custom_socket_vtable->close(socket, custom_close_callback);
+  }
+  done = (--connect->refs == 0);
+  if (done) {
+    custom_tcp_connect_cleanup(connect);
+  }
+}
+
+static void custom_connect_callback(grpc_custom_socket* socket,
+                                    grpc_error* error) {
+  grpc_core::ExecCtx exec_ctx;
+  grpc_custom_tcp_connect* connect = socket->connector;
+  int done;
+  grpc_closure* closure = connect->closure;
+  grpc_timer_cancel(&connect->alarm);
+  if (error == GRPC_ERROR_NONE) {
+    *connect->endpoint = custom_tcp_endpoint_create(
+        socket, connect->resource_quota, connect->addr_name);
+  }
+  done = (--connect->refs == 0);
+  if (done) {
+    grpc_core::ExecCtx::Get()->Flush();
+    custom_tcp_connect_cleanup(connect);
+  }
+  GRPC_CLOSURE_SCHED(closure, error);
+}
+
+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* resolved_addr,
+                        grpc_millis deadline) {
+  GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD();
+  (void)channel_args;
+  (void)interested_parties;
+  grpc_custom_tcp_connect* connect;
+  grpc_resource_quota* resource_quota = grpc_resource_quota_create(nullptr);
+  if (channel_args != nullptr) {
+    for (size_t i = 0; i < channel_args->num_args; i++) {
+      if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
+        grpc_resource_quota_unref_internal(resource_quota);
+        resource_quota = grpc_resource_quota_ref_internal(
+            (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
+      }
+    }
+  }
+  grpc_custom_socket* socket =
+      (grpc_custom_socket*)gpr_malloc(sizeof(grpc_custom_socket));
+  socket->refs = 2;
+  grpc_custom_socket_vtable->init(socket, GRPC_AF_UNSPEC);
+  connect =
+      (grpc_custom_tcp_connect*)gpr_malloc(sizeof(grpc_custom_tcp_connect));
+  connect->closure = closure;
+  connect->endpoint = ep;
+  connect->addr_name = grpc_sockaddr_to_uri(resolved_addr);
+  connect->resource_quota = resource_quota;
+  connect->socket = socket;
+  socket->connector = connect;
+  socket->endpoint = nullptr;
+  socket->listener = nullptr;
+  connect->refs = 2;
+
+  if (grpc_tcp_trace.enabled()) {
+    gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %p %s: asynchronously connecting",
+            socket, connect->addr_name);
+  }
+
+  grpc_custom_socket_vtable->connect(
+      socket, (const grpc_sockaddr*)resolved_addr->addr, resolved_addr->len,
+      custom_connect_callback);
+  GRPC_CLOSURE_INIT(&connect->on_alarm, on_alarm, socket,
+                    grpc_schedule_on_exec_ctx);
+  grpc_timer_init(&connect->alarm, deadline, &connect->on_alarm);
+}
+
+grpc_tcp_client_vtable custom_tcp_client_vtable = {tcp_connect};