Merge with master

1 files changed, 129 insertions, 0 deletions

diff --git a/test/core/util/reconnect_server.cc b/test/core/util/reconnect_server.cc
new file mode 100644
index 0000000000..0e4145831c
--- /dev/null
+++ b/test/core/util/reconnect_server.cc
@@ -0,0 +1,129 @@
+/*
+ *
+ * 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 "test/core/util/reconnect_server.h"
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+#include <string.h>
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/iomgr/tcp_server.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_tcp_server.h"
+
+static void pretty_print_backoffs(reconnect_server* server) {
+  gpr_timespec diff;
+  int i = 1;
+  double expected_backoff = 1000.0, backoff;
+  timestamp_list* head = server->head;
+  gpr_log(GPR_INFO, "reconnect server: new connection");
+  for (head = server->head; head && head->next; head = head->next, i++) {
+    diff = gpr_time_sub(head->next->timestamp, head->timestamp);
+    backoff = gpr_time_to_millis(diff);
+    gpr_log(GPR_INFO,
+            "retry %2d:backoff %6.2fs,expected backoff %6.2fs, jitter %4.2f%%",
+            i, backoff / 1000.0, expected_backoff / 1000.0,
+            (backoff - expected_backoff) * 100.0 / expected_backoff);
+    expected_backoff *= 1.6;
+    int max_reconnect_backoff_ms = 120 * 1000;
+    if (server->max_reconnect_backoff_ms > 0) {
+      max_reconnect_backoff_ms = server->max_reconnect_backoff_ms;
+    }
+    if (expected_backoff > max_reconnect_backoff_ms) {
+      expected_backoff = max_reconnect_backoff_ms;
+    }
+  }
+}
+
+static void on_connect(void* arg, grpc_endpoint* tcp,
+                       grpc_pollset* accepting_pollset,
+                       grpc_tcp_server_acceptor* acceptor) {
+  gpr_free(acceptor);
+  char* peer;
+  char* last_colon;
+  reconnect_server* server = (reconnect_server*)arg;
+  gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
+  timestamp_list* new_tail;
+  peer = grpc_endpoint_get_peer(tcp);
+  grpc_endpoint_shutdown(tcp,
+                         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected"));
+  grpc_endpoint_destroy(tcp);
+  if (peer) {
+    last_colon = strrchr(peer, ':');
+    if (server->peer == NULL) {
+      server->peer = peer;
+    } else {
+      if (last_colon == NULL) {
+        gpr_log(GPR_ERROR, "peer does not contain a ':'");
+      } else if (strncmp(server->peer, peer, (size_t)(last_colon - peer)) !=
+                 0) {
+        gpr_log(GPR_ERROR, "mismatched peer! %s vs %s", server->peer, peer);
+      }
+      gpr_free(peer);
+    }
+  }
+  new_tail = static_cast<timestamp_list*>(gpr_malloc(sizeof(timestamp_list)));
+  new_tail->timestamp = now;
+  new_tail->next = NULL;
+  if (server->tail == NULL) {
+    server->head = new_tail;
+    server->tail = new_tail;
+  } else {
+    server->tail->next = new_tail;
+    server->tail = new_tail;
+  }
+  pretty_print_backoffs(server);
+}
+
+void reconnect_server_init(reconnect_server* server) {
+  test_tcp_server_init(&server->tcp_server, on_connect, server);
+  server->head = NULL;
+  server->tail = NULL;
+  server->peer = NULL;
+  server->max_reconnect_backoff_ms = 0;
+}
+
+void reconnect_server_start(reconnect_server* server, int port) {
+  test_tcp_server_start(&server->tcp_server, port);
+}
+
+void reconnect_server_poll(reconnect_server* server, int seconds) {
+  test_tcp_server_poll(&server->tcp_server, seconds);
+}
+
+void reconnect_server_clear_timestamps(reconnect_server* server) {
+  timestamp_list* new_head = server->head;
+  while (server->head) {
+    new_head = server->head->next;
+    gpr_free(server->head);
+    server->head = new_head;
+  }
+  server->tail = NULL;
+  gpr_free(server->peer);
+  server->peer = NULL;
+}
+
+void reconnect_server_destroy(reconnect_server* server) {
+  reconnect_server_clear_timestamps(server);
+  test_tcp_server_destroy(&server->tcp_server);
+}