Merge remote-tracking branch 'upstream/master' into max_send_size_filter

55 files changed, 451 insertions, 119 deletions

diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 93d21c07d2..00b7fc4cc2 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -399,6 +399,19 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
           push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE,
                        (uint32_t)value);
         }
+      } else if (0 == strcmp(channel_args->args[i].key,
+                             GRPC_ARG_HTTP2_MAX_FRAME_SIZE)) {
+        if (channel_args->args[i].type != GRPC_ARG_INTEGER) {
+          gpr_log(GPR_ERROR, "%s: must be an integer",
+                  GRPC_ARG_HTTP2_MAX_FRAME_SIZE);
+        } else if (channel_args->args[i].value.integer < 16384 ||
+                   channel_args->args[i].value.integer > 16777215) {
+          gpr_log(GPR_ERROR, "%s: must be between 16384 and 16777215",
+                  GRPC_ARG_HTTP2_MAX_FRAME_SIZE);
+        } else {
+          push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE,
+                       (uint32_t)channel_args->args[i].value.integer);
+        }
       }
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/frame.h b/src/core/ext/transport/chttp2/transport/frame.h
index 7776609367..507aae4100 100644
--- a/src/core/ext/transport/chttp2/transport/frame.h
+++ b/src/core/ext/transport/chttp2/transport/frame.h
@@ -52,8 +52,6 @@ typedef struct grpc_chttp2_transport_parsing grpc_chttp2_transport_parsing;
 #define GRPC_CHTTP2_FRAME_GOAWAY 7
 #define GRPC_CHTTP2_FRAME_WINDOW_UPDATE 8
 
-#define GRPC_CHTTP2_MAX_PAYLOAD_LENGTH ((1 << 14) - 1)
-
 #define GRPC_CHTTP2_DATA_FLAG_END_STREAM 1
 #define GRPC_CHTTP2_FLAG_ACK 1
 #define GRPC_CHTTP2_DATA_FLAG_END_HEADERS 4
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.c b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
index 2cb8205d94..581471ba02 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
@@ -78,6 +78,8 @@ typedef struct {
   uint32_t stream_id;
   gpr_slice_buffer *output;
   grpc_transport_one_way_stats *stats;
+  /* maximum size of a frame */
+  size_t max_frame_size;
 } framer_state;
 
 /* fills p (which is expected to be 9 bytes long) with a data frame header */
@@ -123,7 +125,7 @@ static void begin_frame(framer_state *st) {
    needed */
 static void ensure_space(framer_state *st, size_t need_bytes) {
   if (st->output->length - st->output_length_at_start_of_frame + need_bytes <=
-      GRPC_CHTTP2_MAX_PAYLOAD_LENGTH) {
+      st->max_frame_size) {
     return;
   }
   finish_frame(st, 0, 0);
@@ -149,8 +151,8 @@ static void add_header_data(framer_state *st, gpr_slice slice) {
   size_t len = GPR_SLICE_LENGTH(slice);
   size_t remaining;
   if (len == 0) return;
-  remaining = GRPC_CHTTP2_MAX_PAYLOAD_LENGTH +
-              st->output_length_at_start_of_frame - st->output->length;
+  remaining = st->max_frame_size + st->output_length_at_start_of_frame -
+              st->output->length;
   if (len <= remaining) {
     st->stats->header_bytes += len;
     gpr_slice_buffer_add(st->output, slice);
@@ -542,6 +544,7 @@ void grpc_chttp2_hpack_compressor_set_max_table_size(
 void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c,
                                uint32_t stream_id,
                                grpc_metadata_batch *metadata, int is_eof,
+                               size_t max_frame_size,
                                grpc_transport_one_way_stats *stats,
                                gpr_slice_buffer *outbuf) {
   framer_state st;
@@ -555,6 +558,7 @@ void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c,
   st.output = outbuf;
   st.is_first_frame = 1;
   st.stats = stats;
+  st.max_frame_size = max_frame_size;
 
   /* Encode a metadata batch; store the returned values, representing
      a metadata element that needs to be unreffed back into the metadata
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.h b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
index 0f7b0b063a..4c3a931549 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
@@ -91,6 +91,7 @@ void grpc_chttp2_hpack_compressor_set_max_usable_size(
 
 void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c, uint32_t id,
                                grpc_metadata_batch *metadata, int is_eof,
+                               size_t max_frame_size,
                                grpc_transport_one_way_stats *stats,
                                gpr_slice_buffer *outbuf);
 
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index e1dcf5262a..d67c014e54 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -223,6 +223,8 @@ typedef struct {
   uint8_t is_client;
   /** callback for when writing is done */
   grpc_closure done_cb;
+  /** maximum frame size */
+  uint32_t max_frame_size;
 } grpc_chttp2_transport_writing;
 
 struct grpc_chttp2_transport_parsing {
diff --git a/src/core/ext/transport/chttp2/transport/writing.c b/src/core/ext/transport/chttp2/transport/writing.c
index 8f7a1f55c6..311b26e354 100644
--- a/src/core/ext/transport/chttp2/transport/writing.c
+++ b/src/core/ext/transport/chttp2/transport/writing.c
@@ -51,6 +51,10 @@ int grpc_chttp2_unlocking_check_writes(
 
   GPR_TIMER_BEGIN("grpc_chttp2_unlocking_check_writes", 0);
 
+  transport_writing->max_frame_size =
+      transport_global->settings[GRPC_ACKED_SETTINGS]
+                                [GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE];
+
   /* simple writes are queued to qbuf, and flushed here */
   gpr_slice_buffer_swap(&transport_global->qbuf, &transport_writing->outbuf);
   GPR_ASSERT(transport_global->qbuf.count == 0);
@@ -206,14 +210,15 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
   while (
       grpc_chttp2_list_pop_writing_stream(transport_writing, &stream_writing)) {
     uint32_t max_outgoing =
-        (uint32_t)GPR_MIN(GRPC_CHTTP2_MAX_PAYLOAD_LENGTH,
+        (uint32_t)GPR_MIN(transport_writing->max_frame_size,
                           GPR_MIN(stream_writing->outgoing_window,
                                   transport_writing->outgoing_window));
     /* send initial metadata if it's available */
     if (stream_writing->send_initial_metadata != NULL) {
       grpc_chttp2_encode_header(
           &transport_writing->hpack_compressor, stream_writing->id,
-          stream_writing->send_initial_metadata, 0, &stream_writing->stats,
+          stream_writing->send_initial_metadata, 0,
+          transport_writing->max_frame_size, &stream_writing->stats,
           &transport_writing->outbuf);
       stream_writing->send_initial_metadata = NULL;
       stream_writing->sent_initial_metadata = 1;
@@ -303,7 +308,8 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
       } else {
         grpc_chttp2_encode_header(
             &transport_writing->hpack_compressor, stream_writing->id,
-            stream_writing->send_trailing_metadata, 1, &stream_writing->stats,
+            stream_writing->send_trailing_metadata, 1,
+            transport_writing->max_frame_size, &stream_writing->stats,
             &transport_writing->outbuf);
       }
       if (!transport_writing->is_client && !stream_writing->read_closed) {
diff --git a/src/core/lib/channel/http_client_filter.c b/src/core/lib/channel/http_client_filter.c
index ef68cc86ea..edcc741ff6 100644
--- a/src/core/lib/channel/http_client_filter.c
+++ b/src/core/lib/channel/http_client_filter.c
@@ -233,7 +233,6 @@ static void hc_mutate_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
     if (method == GRPC_MDELEM_METHOD_GET) {
       /* allocate memory to hold the entire payload */
       calld->payload_bytes = gpr_malloc(op->send_message->length);
-      GPR_ASSERT(calld->payload_bytes);
 
       /* read slices of send_message and copy into payload_bytes */
       calld->send_op = *op;
diff --git a/src/core/lib/support/percent_encoding.c b/src/core/lib/support/percent_encoding.c
new file mode 100644
index 0000000000..3c19f264f9
--- /dev/null
+++ b/src/core/lib/support/percent_encoding.c
@@ -0,0 +1,180 @@
+/*
+ *
+ * Copyright 2016, 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/lib/support/percent_encoding.h"
+
+#include <grpc/support/log.h>
+
+const uint8_t gpr_url_percent_encoding_unreserved_bytes[256 / 8] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0xff, 0x03, 0xfe, 0xff, 0xff,
+    0x87, 0xfe, 0xff, 0xff, 0x47, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+const uint8_t gpr_compatible_percent_encoding_unreserved_bytes[256 / 8] = {
+    0x00, 0x00, 0x00, 0x00, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+static bool is_unreserved_character(uint8_t c,
+                                    const uint8_t *unreserved_bytes) {
+  return ((unreserved_bytes[c / 8] >> (c % 8)) & 1) != 0;
+}
+
+gpr_slice gpr_percent_encode_slice(gpr_slice slice,
+                                   const uint8_t *unreserved_bytes) {
+  static const uint8_t hex[] = "0123456789ABCDEF";
+
+  // first pass: count the number of bytes needed to output this string
+  size_t output_length = 0;
+  const uint8_t *slice_start = GPR_SLICE_START_PTR(slice);
+  const uint8_t *slice_end = GPR_SLICE_END_PTR(slice);
+  const uint8_t *p;
+  bool any_reserved_bytes = false;
+  for (p = slice_start; p < slice_end; p++) {
+    bool unres = is_unreserved_character(*p, unreserved_bytes);
+    output_length += unres ? 1 : 3;
+    any_reserved_bytes |= !unres;
+  }
+  // no unreserved bytes: return the string unmodified
+  if (!any_reserved_bytes) {
+    return gpr_slice_ref(slice);
+  }
+  // second pass: actually encode
+  gpr_slice out = gpr_slice_malloc(output_length);
+  uint8_t *q = GPR_SLICE_START_PTR(out);
+  for (p = slice_start; p < slice_end; p++) {
+    if (is_unreserved_character(*p, unreserved_bytes)) {
+      *q++ = *p;
+    } else {
+      *q++ = '%';
+      *q++ = hex[*p >> 4];
+      *q++ = hex[*p & 15];
+    }
+  }
+  GPR_ASSERT(q == GPR_SLICE_END_PTR(out));
+  return out;
+}
+
+static bool valid_hex(const uint8_t *p, const uint8_t *end) {
+  if (p >= end) return false;
+  return (*p >= '0' && *p <= '9') || (*p >= 'a' && *p <= 'f') ||
+         (*p >= 'A' && *p <= 'F');
+}
+
+static uint8_t dehex(uint8_t c) {
+  if (c >= '0' && c <= '9') return (uint8_t)(c - '0');
+  if (c >= 'A' && c <= 'F') return (uint8_t)(c - 'A' + 10);
+  if (c >= 'a' && c <= 'f') return (uint8_t)(c - 'a' + 10);
+  GPR_UNREACHABLE_CODE(return 255);
+}
+
+bool gpr_strict_percent_decode_slice(gpr_slice slice_in,
+                                     const uint8_t *unreserved_bytes,
+                                     gpr_slice *slice_out) {
+  const uint8_t *p = GPR_SLICE_START_PTR(slice_in);
+  const uint8_t *in_end = GPR_SLICE_END_PTR(slice_in);
+  size_t out_length = 0;
+  bool any_percent_encoded_stuff = false;
+  while (p != in_end) {
+    if (*p == '%') {
+      if (!valid_hex(++p, in_end)) return false;
+      if (!valid_hex(++p, in_end)) return false;
+      p++;
+      out_length++;
+      any_percent_encoded_stuff = true;
+    } else if (is_unreserved_character(*p, unreserved_bytes)) {
+      p++;
+      out_length++;
+    } else {
+      return false;
+    }
+  }
+  if (!any_percent_encoded_stuff) {
+    *slice_out = gpr_slice_ref(slice_in);
+    return true;
+  }
+  p = GPR_SLICE_START_PTR(slice_in);
+  *slice_out = gpr_slice_malloc(out_length);
+  uint8_t *q = GPR_SLICE_START_PTR(*slice_out);
+  while (p != in_end) {
+    if (*p == '%') {
+      *q++ = (uint8_t)(dehex(p[1]) << 4) | (dehex(p[2]));
+      p += 3;
+    } else {
+      *q++ = *p++;
+    }
+  }
+  GPR_ASSERT(q == GPR_SLICE_END_PTR(*slice_out));
+  return true;
+}
+
+gpr_slice gpr_permissive_percent_decode_slice(gpr_slice slice_in) {
+  const uint8_t *p = GPR_SLICE_START_PTR(slice_in);
+  const uint8_t *in_end = GPR_SLICE_END_PTR(slice_in);
+  size_t out_length = 0;
+  bool any_percent_encoded_stuff = false;
+  while (p != in_end) {
+    if (*p == '%') {
+      if (!valid_hex(p + 1, in_end) || !valid_hex(p + 2, in_end)) {
+        p++;
+        out_length++;
+      } else {
+        p += 3;
+        out_length++;
+        any_percent_encoded_stuff = true;
+      }
+    } else {
+      p++;
+      out_length++;
+    }
+  }
+  if (!any_percent_encoded_stuff) {
+    return gpr_slice_ref(slice_in);
+  }
+  p = GPR_SLICE_START_PTR(slice_in);
+  gpr_slice out = gpr_slice_malloc(out_length);
+  uint8_t *q = GPR_SLICE_START_PTR(out);
+  while (p != in_end) {
+    if (*p == '%') {
+      if (!valid_hex(p + 1, in_end) || !valid_hex(p + 2, in_end)) {
+        *q++ = *p++;
+      } else {
+        *q++ = (uint8_t)(dehex(p[1]) << 4) | (dehex(p[2]));
+        p += 3;
+      }
+    } else {
+      *q++ = *p++;
+    }
+  }
+  GPR_ASSERT(q == GPR_SLICE_END_PTR(out));
+  return out;
+}
diff --git a/src/core/lib/support/percent_encoding.h b/src/core/lib/support/percent_encoding.h
new file mode 100644
index 0000000000..000bf14ede
--- /dev/null
+++ b/src/core/lib/support/percent_encoding.h
@@ -0,0 +1,78 @@
+/*
+ *
+ * Copyright 2016, 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.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H
+#define GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H
+
+/* Percent encoding and decoding of slices.
+   Transforms arbitrary strings into safe-for-transmission strings by using
+   variants of percent encoding (RFC 3986).
+   Two major variants are supplied: one that strictly matches URL encoding,
+     and another which applies percent encoding only to non-http2 header
+     bytes (the 'compatible' variant) */
+
+#include <stdbool.h>
+
+#include <grpc/support/slice.h>
+
+/* URL percent encoding spec bitfield (usabel as 'unreserved_bytes' in
+   gpr_percent_encode_slice, gpr_strict_percent_decode_slice).
+   Flags [A-Za-z0-9-_.~] as unreserved bytes for the percent encoding routines
+   */
+extern const uint8_t gpr_url_percent_encoding_unreserved_bytes[256 / 8];
+/* URL percent encoding spec bitfield (usabel as 'unreserved_bytes' in
+   gpr_percent_encode_slice, gpr_strict_percent_decode_slice).
+   Flags ascii7 non-control characters excluding '%' as unreserved bytes for the
+   percent encoding routines */
+extern const uint8_t gpr_compatible_percent_encoding_unreserved_bytes[256 / 8];
+
+/* Percent-encode a slice, returning the new slice (this cannot fail):
+   unreserved_bytes is a bitfield indicating which bytes are considered
+   unreserved and thus do not need percent encoding */
+gpr_slice gpr_percent_encode_slice(gpr_slice slice,
+                                   const uint8_t *unreserved_bytes);
+/* Percent-decode a slice, strictly.
+   If the input is legal (contains no unreserved bytes, and legal % encodings),
+   returns true and sets *slice_out to the decoded slice.
+   If the input is not legal, returns false and leaves *slice_out untouched.
+   unreserved_bytes is a bitfield indicating which bytes are considered
+   unreserved and thus do not need percent encoding */
+bool gpr_strict_percent_decode_slice(gpr_slice slice_in,
+                                     const uint8_t *unreserved_bytes,
+                                     gpr_slice *slice_out);
+/* Percent-decode a slice, permissively.
+   If a % triplet can not be decoded, pass it through verbatim.
+   This cannot fail. */
+gpr_slice gpr_permissive_percent_decode_slice(gpr_slice slice_in);
+
+#endif /* GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H */
diff --git a/src/cpp/client/channel.cc b/src/cpp/client/channel_cc.cc
index 43b3875cb3..43b3875cb3 100644
--- a/src/cpp/client/channel.cc
+++ b/src/cpp/client/channel_cc.cc
diff --git a/src/cpp/client/credentials.cc b/src/cpp/client/credentials_cc.cc
index e6a4f81b0d..e6a4f81b0d 100644
--- a/src/cpp/client/credentials.cc
+++ b/src/cpp/client/credentials_cc.cc
diff --git a/src/cpp/common/completion_queue.cc b/src/cpp/common/completion_queue_cc.cc
index 00cc102f92..00cc102f92 100644
--- a/src/cpp/common/completion_queue.cc
+++ b/src/cpp/common/completion_queue_cc.cc
diff --git a/src/cpp/server/server.cc b/src/cpp/server/server_cc.cc
index a693ce9b8e..a693ce9b8e 100644
--- a/src/cpp/server/server.cc
+++ b/src/cpp/server/server_cc.cc
diff --git a/src/cpp/util/byte_buffer.cc b/src/cpp/util/byte_buffer_cc.cc
index 91ed66b766..91ed66b766 100644
--- a/src/cpp/util/byte_buffer.cc
+++ b/src/cpp/util/byte_buffer_cc.cc
diff --git a/src/cpp/util/slice.cc b/src/cpp/util/slice_cc.cc
index 7e88423b6c..7e88423b6c 100644
--- a/src/cpp/util/slice.cc
+++ b/src/cpp/util/slice_cc.cc
diff --git a/src/cpp/util/time.cc b/src/cpp/util/time_cc.cc
index c43d848cc6..c43d848cc6 100644
--- a/src/cpp/util/time.cc
+++ b/src/cpp/util/time_cc.cc
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.csproj b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
index 7a6955311a..a44aaf1fdd 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.csproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
@@ -49,14 +49,26 @@
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="log4net">
+      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Zlib.Portable">
+      <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.Auth/packages.config b/src/csharp/Grpc.Auth/packages.config
index 738d3e6f3b..11c6375c63 100644
--- a/src/csharp/Grpc.Auth/packages.config
+++ b/src/csharp/Grpc.Auth/packages.config
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
+  <package id="log4net" version="2.0.3" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 30f0944693..595e29f50a 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -23,18 +23,13 @@
   },
   "dependencies": {
     "Grpc.Core": "1.1.0-dev",
-    "Google.Apis.Auth": "1.15.0"
+    "Google.Apis.Auth": "1.16.0"
   },
   "frameworks": {
     "net45": { },
     "netstandard1.5": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
-        "Microsoft.NETCore.Portable.Compatibility": "1.0.1",
-        "NETStandard.Library": "1.6.0",
-        "System.Threading.Tasks": "4.0.11"
+        "NETStandard.Library": "1.6.0"
       }
     }
   }
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index f7e21a25dd..50c328abe1 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -36,9 +36,6 @@
   "frameworks": {
     "net45": { },
     "netstandard1.5": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
         "NETStandard.Library": "1.6.0",
         "System.Threading.Thread": "4.0.0"
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index ad319478ab..c0725a1468 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -56,9 +56,6 @@
   "frameworks": {
     "net45": { },
     "netcoreapp1.0": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
         "Microsoft.NETCore.App": "1.0.0",
         "NETStandard.Library": "1.6.0"
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index ad319478ab..c0725a1468 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -56,9 +56,6 @@
   "frameworks": {
     "net45": { },
     "netcoreapp1.0": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
         "Microsoft.NETCore.App": "1.0.0",
         "NETStandard.Library": "1.6.0"
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
index c8801a9413..a114d96127 100644
--- a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
@@ -36,9 +36,6 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
@@ -48,6 +45,9 @@
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Examples.Tests/packages.config b/src/csharp/Grpc.Examples.Tests/packages.config
index cc473eb34c..f14517d2e2 100644
--- a/src/csharp/Grpc.Examples.Tests/packages.config
+++ b/src/csharp/Grpc.Examples.Tests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.csproj b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
index 4521649b6f..dcbef5fc0b 100644
--- a/src/csharp/Grpc.Examples/Grpc.Examples.csproj
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
@@ -37,10 +37,6 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
@@ -50,6 +46,9 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Examples/packages.config b/src/csharp/Grpc.Examples/packages.config
index 8985ae4c77..d17347f08f 100644
--- a/src/csharp/Grpc.Examples/packages.config
+++ b/src/csharp/Grpc.Examples/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index 98bd5d852c..ce0cfa860d 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -11,7 +11,7 @@
     "Grpc.Core": {
       "target": "project"
     },
-    "Google.Protobuf": "3.0.0-beta3"
+    "Google.Protobuf": "3.0.0"
   },
   "frameworks": {
     "net45": {
@@ -21,9 +21,6 @@
       }
     },
     "netcoreapp1.0": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
         "Microsoft.NETCore.App": "1.0.0",
         "NETStandard.Library": "1.6.0"
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
index aefacfbcc0..93c3b3a55f 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
@@ -44,15 +44,15 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.HealthCheck.Tests/packages.config b/src/csharp/Grpc.HealthCheck.Tests/packages.config
index 2bcfec8829..e796d6b135 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/packages.config
+++ b/src/csharp/Grpc.HealthCheck.Tests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
index e13416cc1a..54a2984964 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
@@ -38,10 +38,6 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
@@ -53,6 +49,9 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.HealthCheck/packages.config b/src/csharp/Grpc.HealthCheck/packages.config
index 063094f775..f8e353bf26 100644
--- a/src/csharp/Grpc.HealthCheck/packages.config
+++ b/src/csharp/Grpc.HealthCheck/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 7c062a7e40..9d631229d8 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -23,7 +23,7 @@
   },
   "dependencies": {
     "Grpc.Core": "1.1.0-dev",
-    "Google.Protobuf": "3.0.0-beta3"
+    "Google.Protobuf": "3.0.0"
   },
   "frameworks": {
     "net45": {
@@ -33,9 +33,6 @@
       }
     },
     "netstandard1.5": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
         "NETStandard.Library": "1.6.0"
       }
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
index 6816b5c5a2..ae58073b52 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
@@ -49,14 +49,26 @@
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="log4net">
+      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Zlib.Portable">
+      <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/packages.config b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
index 738d3e6f3b..11c6375c63 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
+  <package id="log4net" version="2.0.3" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index 287950720f..e54b5bd296 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -59,8 +59,7 @@
     "net45": { },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
         "Microsoft.NETCore.App": "1.0.0",
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index 287950720f..e54b5bd296 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -59,8 +59,7 @@
     "net45": { },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
         "Microsoft.NETCore.App": "1.0.0",
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
index 987387ca25..d5c40ba948 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -49,14 +49,26 @@
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="log4net">
+      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Zlib.Portable">
+      <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/packages.config b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
index 738d3e6f3b..11c6375c63 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
+  <package id="log4net" version="2.0.3" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index 287950720f..e54b5bd296 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -59,8 +59,7 @@
     "net45": { },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
         "Microsoft.NETCore.App": "1.0.0",
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index 287950720f..e54b5bd296 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -59,8 +59,7 @@
     "net45": { },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
         "Microsoft.NETCore.App": "1.0.0",
diff --git a/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs b/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
index c17ede7561..ac6c8d0740 100644
--- a/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
@@ -48,8 +48,6 @@ namespace Grpc.IntegrationTesting
     {
         TestService.TestServiceClient unimplementedClient = new UnimplementedTestServiceClient();
 
-        // TODO: replace Moq by some mocking library with CoreCLR support.
-#if !NETCOREAPP1_0
         [Test]
         public void ExpandedParamOverloadCanBeMocked()
         {
@@ -72,7 +70,6 @@ namespace Grpc.IntegrationTesting
 
             Assert.AreSame(expected, mockClient.Object.UnaryCall(new SimpleRequest(), new CallOptions()));
         }
-#endif
 
         [Test]
         public void DefaultMethodStubThrows_UnaryCall()
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index e030b21eec..afd85fb484 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -38,9 +38,6 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Moq">
-      <HintPath>..\packages\Moq.4.2.1510.2205\lib\net40\Moq.dll</HintPath>
-    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
@@ -48,9 +45,6 @@
     <Reference Include="BouncyCastle.Crypto">
       <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
@@ -63,17 +57,38 @@
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
+    <Reference Include="CommandLineParser.Unofficial">
+      <HintPath>..\packages\CommandLineParser.Unofficial.2.0.275\lib\net45\CommandLineParser.Unofficial.dll</HintPath>
+    </Reference>
+    <Reference Include="log4net">
+      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Zlib.Portable">
+      <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="CommandLineParser.Unofficial">
-      <HintPath>..\packages\CommandLineParser.Unofficial.2.0.275\lib\net45\CommandLineParser.Unofficial.dll</HintPath>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
+    <Reference Include="Castle.Core">
+      <HintPath>..\packages\Castle.Core.3.3.3\lib\net45\Castle.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Moq">
+      <HintPath>..\packages\Moq.4.6.38-alpha\lib\net45\Moq.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting/packages.config b/src/csharp/Grpc.IntegrationTesting/packages.config
index 8bf9dd4937..a39fb3a23e 100644
--- a/src/csharp/Grpc.IntegrationTesting/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting/packages.config
@@ -1,13 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
+  <package id="Castle.Core" version="3.3.3" targetFramework="net45" />
   <package id="CommandLineParser.Unofficial" version="2.0.275" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
-  <package id="Moq" version="4.2.1510.2205" targetFramework="net45" />
+  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
+  <package id="log4net" version="2.0.3" targetFramework="net45" />
+  <package id="Moq" version="4.6.38-alpha" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 9d706510b2..abc217b092 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -57,16 +57,14 @@
     "Grpc.Core": {
       "target": "project"
     },
-    "Google.Protobuf": "3.0.0-beta3",
+    "Google.Protobuf": "3.0.0",
     "CommandLineParser.Unofficial": "2.0.275",
+    "Moq": "4.6.38-alpha",
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
   "frameworks": {
     "net45": {
-      "dependencies": {
-        "Moq": "4.2.1510.2205"
-      },
       "frameworkAssemblies": {
         "System.Runtime": "",
         "System.IO": ""
@@ -74,8 +72,7 @@
     },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
         "Microsoft.NETCore.App": "1.0.0",
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 3d0947c03d..068bf709b8 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -255,8 +255,10 @@ GPR_EXPORT intptr_t GPR_CALLTYPE grpcsharp_batch_context_recv_message_length(
   }
 
   GPR_ASSERT(grpc_byte_buffer_reader_init(&reader, ctx->recv_message));
+  intptr_t result = (intptr_t)grpc_byte_buffer_length(reader.buffer_out);
+  grpc_byte_buffer_reader_destroy(&reader);
 
-  return (intptr_t)grpc_byte_buffer_length(reader.buffer_out);
+  return result;
 }
 
 /*
@@ -279,6 +281,8 @@ GPR_EXPORT void GPR_CALLTYPE grpcsharp_batch_context_recv_message_to_buffer(
     offset += len;
     gpr_slice_unref(slice);
   }
+
+  grpc_byte_buffer_reader_destroy(&reader);
 }
 
 GPR_EXPORT grpc_status_code GPR_CALLTYPE
diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index 05a1d10f6d..eecda4c03a 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -103,6 +103,11 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 
 @synthesize state = _state;
 
+// TODO(jcanizales): If grpc_init is idempotent, this should be changed from load to initialize.
++ (void)load {
+  grpc_init();
+}
+
 - (instancetype)init {
   return [self initWithHost:nil path:nil requestsWriter:nil];
 }
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
index 97f6b89340..1339429660 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
@@ -245,11 +245,6 @@
   }
 
   if (self = [super init]) {
-    static dispatch_once_t initialization;
-    dispatch_once(&initialization, ^{
-      grpc_init();
-    });
-
     // Each completion queue consumes one thread. There's a trade to be made between creating and
     // consuming too many threads and having contention of multiple calls in a single completion
     // queue. Currently we use a singleton queue.
diff --git a/src/php/lib/Grpc/BaseStub.php b/src/php/lib/Grpc/BaseStub.php
index 2fec1bd9cc..d850eebc78 100644
--- a/src/php/lib/Grpc/BaseStub.php
+++ b/src/php/lib/Grpc/BaseStub.php
@@ -41,6 +41,7 @@ namespace Grpc;
 class BaseStub
 {
     private $hostname;
+    private $hostname_override;
     private $channel;
 
     // a callback function
@@ -75,6 +76,9 @@ class BaseStub
         } else {
             $opts['grpc.primary_user_agent'] = '';
         }
+        if (!empty($opts['grpc.ssl_target_name_override'])) {
+            $this->hostname_override = $opts['grpc.ssl_target_name_override'];
+        }
         $opts['grpc.primary_user_agent'] .=
             'grpc-php/'.$package_config['version'];
         if (!array_key_exists('credentials', $opts)) {
@@ -173,7 +177,12 @@ class BaseStub
         }
         $service_name = substr($method, 0, $last_slash_idx);
 
-        return 'https://'.$this->hostname.$service_name;
+        if ($this->hostname_override) {
+            $hostname = $this->hostname_override;
+        } else {
+            $hostname = $this->hostname;
+        }
+        return 'https://'.$hostname.$service_name;
     }
 
     /**
diff --git a/src/php/tests/interop/interop_client.php b/src/php/tests/interop/interop_client.php
index c94ba61296..94ceeda02c 100755
--- a/src/php/tests/interop/interop_client.php
+++ b/src/php/tests/interop/interop_client.php
@@ -108,7 +108,7 @@ function performLargeUnary($stub, $fillUsername = false, $fillOauthScope = false
     $request->setFillUsername($fillUsername);
     $request->setFillOauthScope($fillOauthScope);
 
-    $options = false;
+    $options = [];
     if ($callback) {
         $options['call_credentials_callback'] = $callback;
     }
diff --git a/src/proto/grpc/testing/echo.proto b/src/proto/grpc/testing/echo.proto
index c596aabfcc..ca60a41b4f 100644
--- a/src/proto/grpc/testing/echo.proto
+++ b/src/proto/grpc/testing/echo.proto
@@ -42,7 +42,7 @@ service EchoTestService {
   rpc Unimplemented(EchoRequest) returns (EchoResponse);
 }
 
-service UnimplementedService {
+service UnimplementedEchoService {
   rpc Unimplemented(EchoRequest) returns (EchoResponse);
 }
 
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index 513839df7d..faf3ab5f0d 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -1078,7 +1078,7 @@ def access_token_call_credentials(access_token):
 
   Args:
     access_token: A string to place directly in the http request
-      authorization header, ie "Authorization: Bearer <access_token>".
+      authorization header, ie "authorization: Bearer <access_token>".
 
   Returns:
     A CallCredentials.
@@ -1193,7 +1193,7 @@ def insecure_channel(target, options=None):
 
 
 def secure_channel(target, credentials, options=None):
-  """Creates an insecure Channel to a server.
+  """Creates a secure Channel to a server.
 
   Args:
     target: The target to which to connect.
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 461ec052f7..f9c0722222 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -51,6 +51,7 @@ CORE_SOURCE_FILES = [
   'src/core/lib/support/log_posix.c',
   'src/core/lib/support/log_windows.c',
   'src/core/lib/support/murmur_hash.c',
+  'src/core/lib/support/percent_encoding.c',
   'src/core/lib/support/slice.c',
   'src/core/lib/support/slice_buffer.c',
   'src/core/lib/support/stack_lockfree.c',
diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index 3524355cbf..7384206602 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -31,13 +31,9 @@
 
 import os
 import os.path
-import shutil
 import sys
 
-from distutils import core as _core
-from distutils import extension as _extension
 import setuptools
-from setuptools.command import egg_info
 
 import grpc.tools.command
 
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 6d65db8306..66c54aa3e0 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -91,6 +91,10 @@ if grpc_config == 'gcov'
   $LDFLAGS << ' -fprofile-arcs -ftest-coverage -rdynamic'
 end
 
+if grpc_config == 'dbg'
+  $CFLAGS << ' -O0'
+end
+
 $LDFLAGS << ' -Wl,-wrap,memcpy' if RUBY_PLATFORM =~ /linux/
 $LDFLAGS << ' -static' if windows
 
diff --git a/src/ruby/lib/grpc/grpc.rb b/src/ruby/lib/grpc/grpc.rb
index b60a828d66..f46710dc74 100644
--- a/src/ruby/lib/grpc/grpc.rb
+++ b/src/ruby/lib/grpc/grpc.rb
@@ -28,7 +28,12 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 begin
-  require_relative "#{RUBY_VERSION.sub(/\.\d$/, '')}/grpc_c"
-rescue LoadError
-  require_relative 'grpc_c'
+  ruby_version_dirname = /(\d+\.\d+)/.match(RUBY_VERSION).to_s
+  distrib_lib_dir = File.expand_path(ruby_version_dirname,
+                                     File.dirname(__FILE__))
+  if File.directory?(distrib_lib_dir)
+    require_relative "#{distrib_lib_dir}/grpc_c"
+  else
+    require_relative 'grpc_c'
+  end
 end