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

37 files changed, 1414 insertions, 230 deletions

diff --git a/test/core/bad_client/gen_build_yaml.py b/test/core/bad_client/gen_build_yaml.py
index fb86525b1a..32ab3f2137 100755
--- a/test/core/bad_client/gen_build_yaml.py
+++ b/test/core/bad_client/gen_build_yaml.py
@@ -83,6 +83,7 @@ def main():
               'secure': 'no',
               'src': ['test/core/bad_client/tests/%s.c' % t],
               'vs_proj_dir': 'test',
+              'exclude_iomgrs': ['uv'],
               'deps': [
                   'bad_client_test',
                   'grpc_test_util_unsecure',
diff --git a/test/core/client_channel/set_initial_connect_string_test.c b/test/core/client_channel/set_initial_connect_string_test.c
index b7bd67567c..379f30fb9f 100644
--- a/test/core/client_channel/set_initial_connect_string_test.c
+++ b/test/core/client_channel/set_initial_connect_string_test.c
@@ -30,6 +30,13 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
+
+/* With the addition of a libuv endpoint, sockaddr.h now includes uv.h when
+   using that endpoint. Because of various transitive includes in uv.h,
+   including windows.h on Windows, uv.h must be included before other system
+   headers. Therefore, sockaddr.h must always be included first */
+#include "src/core/lib/iomgr/sockaddr.h"
+
 #include <string.h>
 
 #include <grpc/grpc.h>
@@ -93,15 +100,14 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
   grpc_endpoint_read(exec_ctx, tcp, &state.temp_incoming_buffer, &on_read);
 }
 
-static void set_magic_initial_string(struct sockaddr **addr, size_t *addr_len,
+static void set_magic_initial_string(grpc_resolved_address **addr,
                                      gpr_slice *connect_string) {
   GPR_ASSERT(addr);
-  GPR_ASSERT(addr_len);
+  GPR_ASSERT((*addr)->len);
   *connect_string = gpr_slice_from_copied_string(magic_connect_string);
 }
 
-static void reset_addr_and_set_magic_string(struct sockaddr **addr,
-                                            size_t *addr_len,
+static void reset_addr_and_set_magic_string(grpc_resolved_address **addr,
                                             gpr_slice *connect_string) {
   struct sockaddr_in target;
   *connect_string = gpr_slice_from_copied_string(magic_connect_string);
@@ -109,9 +115,9 @@ static void reset_addr_and_set_magic_string(struct sockaddr **addr,
   target.sin_family = AF_INET;
   target.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
   target.sin_port = htons((uint16_t)server_port);
-  *addr_len = sizeof(target);
-  *addr = (struct sockaddr *)gpr_malloc(sizeof(target));
-  memcpy(*addr, &target, sizeof(target));
+  (*addr)->len = sizeof(target);
+  *addr = (grpc_resolved_address *)gpr_malloc(sizeof(grpc_resolved_address));
+  memcpy((*addr)->addr, &target, sizeof(target));
 }
 
 static gpr_timespec n_sec_deadline(int seconds) {
diff --git a/test/core/end2end/bad_server_response_test.c b/test/core/end2end/bad_server_response_test.c
index 5ed0eb64d2..9a3e1301f9 100644
--- a/test/core/end2end/bad_server_response_test.c
+++ b/test/core/end2end/bad_server_response_test.c
@@ -30,6 +30,13 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
+
+/* With the addition of a libuv endpoint, sockaddr.h now includes uv.h when
+   using that endpoint. Because of various transitive includes in uv.h,
+   including windows.h on Windows, uv.h must be included before other system
+   headers. Therefore, sockaddr.h must always be included first */
+#include "src/core/lib/iomgr/sockaddr.h"
+
 #include <string.h>
 
 #include <grpc/grpc.h>
@@ -40,7 +47,6 @@
 #include <grpc/support/thd.h>
 
 // #include "src/core/ext/transport/chttp2/transport/internal.h"
-#include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 #include "test/core/util/port.h"
diff --git a/test/core/end2end/cq_verifier_internal.h b/test/core/end2end/cq_verifier_internal.h
new file mode 100644
index 0000000000..1549608469
--- /dev/null
+++ b/test/core/end2end/cq_verifier_internal.h
@@ -0,0 +1,47 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPC_TEST_CORE_END2END_CQ_VERIFIER_INTERNAL_H
+#define GRPC_TEST_CORE_END2END_CQ_VERIFIER_INTERNAL_H
+
+#include "test/core/end2end/cq_verifier.h"
+
+typedef struct expectation expectation;
+
+expectation *cq_verifier_get_first_expectation(cq_verifier *v);
+
+void cq_verifier_set_first_expectation(cq_verifier *v, expectation *e);
+
+grpc_event cq_verifier_next_event(cq_verifier *v, int timeout_seconds);
+
+#endif /* GRPC_TEST_CORE_END2END_CQ_VERIFIER_INTERNAL_H */
diff --git a/test/core/end2end/cq_verifier_native.c b/test/core/end2end/cq_verifier_native.c
new file mode 100644
index 0000000000..b1fcb4beed
--- /dev/null
+++ b/test/core/end2end/cq_verifier_native.c
@@ -0,0 +1,74 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+/* This check is for testing only. */
+#ifndef GRPC_UV
+
+#include "test/core/end2end/cq_verifier_internal.h"
+
+/* the verifier itself */
+struct cq_verifier {
+  /* bound completion queue */
+  grpc_completion_queue *cq;
+  /* start of expectation list */
+  expectation *first_expectation;
+  uv_timer_t timer;
+};
+
+cq_verifier *cq_verifier_create(grpc_completion_queue *cq) {
+  cq_verifier *v = gpr_malloc(sizeof(cq_verifier));
+  v->cq = cq;
+  cq_verifier_set_first_expectation(v, NULL);
+  return v;
+}
+
+void cq_verifier_destroy(cq_verifier *v) {
+  cq_verify(v);
+  gpr_free(v);
+}
+
+expectation *cq_verifier_get_first_expectation(cq_verifier *v) {
+  return v->first_expectation;
+}
+
+void cq_verifier_set_first_expectation(cq_verifier *v, expectation *e) {
+  v->first_expectation = e;
+}
+
+grpc_event cq_verifier_next_event(cq_verifier *v, int timeout_seconds) {
+  const gpr_timespec deadline =
+      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(timeout_seconds);
+  return grpc_completion_queue_next(v->cq, deadline, NULL);
+}
+
+#endif /* GRPC_UV */
diff --git a/test/core/end2end/cq_verifier_uv.c b/test/core/end2end/cq_verifier_uv.c
new file mode 100644
index 0000000000..2b5a2ca495
--- /dev/null
+++ b/test/core/end2end/cq_verifier_uv.c
@@ -0,0 +1,112 @@
+/*
+ *
+ * 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 <grpc/support/port_platform.h>
+
+#ifdef GRPC_UV
+
+#include <uv.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "test/core/end2end/cq_verifier_internal.h"
+
+typedef enum timer_state {
+  TIMER_STARTED,
+  TIMER_TRIGGERED,
+  TIMER_CLOSED
+} timer_state;
+
+/* the verifier itself */
+struct cq_verifier {
+  /* bound completion queue */
+  grpc_completion_queue *cq;
+  /* start of expectation list */
+  expectation *first_expectation;
+  uv_timer_t timer;
+};
+
+cq_verifier *cq_verifier_create(grpc_completion_queue *cq) {
+  cq_verifier *v = gpr_malloc(sizeof(cq_verifier));
+  v->cq = cq;
+  v->first_expectation = NULL;
+  uv_timer_init(uv_default_loop(), &v->timer);
+  v->timer.data = (void *)TIMER_STARTED;
+  return v;
+}
+
+static void timer_close_cb(uv_handle_t *handle) {
+  handle->data = (void *)TIMER_CLOSED;
+}
+
+void cq_verifier_destroy(cq_verifier *v) {
+  cq_verify(v);
+  uv_close((uv_handle_t *)&v->timer, timer_close_cb);
+  while ((timer_state)v->timer.data != TIMER_CLOSED) {
+    uv_run(uv_default_loop(), UV_RUN_NOWAIT);
+  }
+  gpr_free(v);
+}
+
+expectation *cq_verifier_get_first_expectation(cq_verifier *v) {
+  return v->first_expectation;
+}
+
+void cq_verifier_set_first_expectation(cq_verifier *v, expectation *e) {
+  v->first_expectation = e;
+}
+
+static void timer_run_cb(uv_timer_t *timer) {
+  timer->data = (void *)TIMER_TRIGGERED;
+}
+
+grpc_event cq_verifier_next_event(cq_verifier *v, int timeout_seconds) {
+  uint64_t timeout_ms =
+      timeout_seconds < 0 ? 0 : (uint64_t)timeout_seconds * 1000;
+  grpc_event ev;
+  v->timer.data = (void *)TIMER_STARTED;
+  uv_timer_start(&v->timer, timer_run_cb, timeout_ms, 0);
+  ev = grpc_completion_queue_next(v->cq, gpr_inf_past(GPR_CLOCK_MONOTONIC),
+                                  NULL);
+  // Stop the loop if the timer goes off or we get a non-timeout event
+  while (((timer_state)v->timer.data != TIMER_TRIGGERED) &&
+         ev.type == GRPC_QUEUE_TIMEOUT) {
+    uv_run(uv_default_loop(), UV_RUN_ONCE);
+    ev = grpc_completion_queue_next(v->cq, gpr_inf_past(GPR_CLOCK_MONOTONIC),
+                                    NULL);
+  }
+  return ev;
+}
+
+#endif /* GRPC_UV */
diff --git a/test/core/end2end/dualstack_socket_test.c b/test/core/end2end/dualstack_socket_test.c
index cb07ca535b..f427202a7b 100644
--- a/test/core/end2end/dualstack_socket_test.c
+++ b/test/core/end2end/dualstack_socket_test.c
@@ -31,6 +31,11 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+// This test won't work except with posix sockets enabled
+#ifdef GRPC_POSIX_SOCKET
+
 #include <string.h>
 
 #include <grpc/grpc.h>
@@ -353,3 +358,9 @@ int main(int argc, char **argv) {
 
   return 0;
 }
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/test/core/end2end/fake_resolver.c b/test/core/end2end/fake_resolver.c
index c5a916ef8b..54cc381612 100644
--- a/test/core/end2end/fake_resolver.c
+++ b/test/core/end2end/fake_resolver.c
@@ -181,10 +181,7 @@ static grpc_resolver* fake_resolver_create(grpc_resolver_factory* factory,
     grpc_uri ith_uri = *args->uri;
     char* part_str = gpr_dump_slice(path_parts.slices[i], GPR_DUMP_ASCII);
     ith_uri.path = part_str;
-    if (!parse_ipv4(
-            &ith_uri,
-            (struct sockaddr_storage*)(&addresses->addresses[i].address.addr),
-            &addresses->addresses[i].address.len)) {
+    if (!parse_ipv4(&ith_uri, &addresses->addresses[i].address)) {
       errors_found = true;
     }
     gpr_free(part_str);
diff --git a/test/core/end2end/fixtures/h2_fd.c b/test/core/end2end/fixtures/h2_fd.c
index 5a58fe34cd..2dfa54fb6b 100644
--- a/test/core/end2end/fixtures/h2_fd.c
+++ b/test/core/end2end/fixtures/h2_fd.c
@@ -31,6 +31,11 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+// This test won't work except with posix sockets enabled
+#ifdef GRPC_POSIX_SOCKET
+
 #include "test/core/end2end/end2end_tests.h"
 
 #include <fcntl.h>
@@ -129,3 +134,9 @@ int main(int argc, char **argv) {
 
   return 0;
 }
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/test/core/end2end/fixtures/h2_full+pipe.c b/test/core/end2end/fixtures/h2_full+pipe.c
index 5d4c44ce94..e0026a7940 100644
--- a/test/core/end2end/fixtures/h2_full+pipe.c
+++ b/test/core/end2end/fixtures/h2_full+pipe.c
@@ -31,6 +31,11 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+// This test requires posix wakeup fds
+#ifdef GRPC_POSIX_WAKEUP_FD
+
 #include "test/core/end2end/end2end_tests.h"
 
 #include <string.h>
@@ -121,3 +126,9 @@ int main(int argc, char **argv) {
 
   return 0;
 }
+
+#else /* GRPC_POSIX_WAKEUP_FD */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_WAKEUP_FD */
diff --git a/test/core/end2end/fixtures/h2_full+trace.c b/test/core/end2end/fixtures/h2_full+trace.c
index 64aa53a5ae..eadc62d963 100644
--- a/test/core/end2end/fixtures/h2_full+trace.c
+++ b/test/core/end2end/fixtures/h2_full+trace.c
@@ -31,9 +31,14 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
 #include "test/core/end2end/end2end_tests.h"
 
 #include <string.h>
+#ifdef GRPC_POSIX_SOCKET
+#include <unistd.h>
+#endif
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
@@ -111,7 +116,7 @@ int main(int argc, char **argv) {
      code paths in trace.c to be taken */
   gpr_setenv("GRPC_TRACE", "doesnt-exist,http,all");
 
-#ifdef GPR_POSIX_SOCKET
+#ifdef GRPC_POSIX_SOCKET
   g_fixture_slowdown_factor = isatty(STDOUT_FILENO) ? 10.0 : 1.0;
 #else
   g_fixture_slowdown_factor = 10.0;
diff --git a/test/core/end2end/fixtures/h2_sockpair+trace.c b/test/core/end2end/fixtures/h2_sockpair+trace.c
index dd4376f046..15b045c33c 100644
--- a/test/core/end2end/fixtures/h2_sockpair+trace.c
+++ b/test/core/end2end/fixtures/h2_sockpair+trace.c
@@ -31,9 +31,14 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
 #include "test/core/end2end/end2end_tests.h"
 
 #include <string.h>
+#ifdef GRPC_POSIX_SOCKET
+#include <unistd.h>
+#endif
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -148,7 +153,7 @@ int main(int argc, char **argv) {
   /* force tracing on, with a value to force many
      code paths in trace.c to be taken */
   gpr_setenv("GRPC_TRACE", "doesnt-exist,http,all");
-#ifdef GPR_POSIX_SOCKET
+#ifdef GRPC_POSIX_SOCKET
   g_fixture_slowdown_factor = isatty(STDOUT_FILENO) ? 10.0 : 1.0;
 #else
   g_fixture_slowdown_factor = 10.0;
diff --git a/test/core/end2end/fixtures/http_proxy.c b/test/core/end2end/fixtures/http_proxy.c
index 22533b9694..b8f046c7df 100644
--- a/test/core/end2end/fixtures/http_proxy.c
+++ b/test/core/end2end/fixtures/http_proxy.c
@@ -33,6 +33,8 @@
 
 #include "test/core/end2end/fixtures/http_proxy.h"
 
+#include "src/core/lib/iomgr/sockaddr.h"
+
 #include <string.h>
 
 #include <grpc/support/alloc.h>
@@ -358,8 +360,7 @@ static void on_read_request_done(grpc_exec_ctx* exec_ctx, void* arg,
       gpr_now(GPR_CLOCK_MONOTONIC), gpr_time_from_seconds(10, GPR_TIMESPAN));
   grpc_tcp_client_connect(exec_ctx, &conn->on_server_connect_done,
                           &conn->server_endpoint, conn->pollset_set,
-                          (struct sockaddr*)&resolved_addresses->addrs[0].addr,
-                          resolved_addresses->addrs[0].len, deadline);
+                          &resolved_addresses->addrs[0], deadline);
   grpc_resolved_addresses_destroy(resolved_addresses);
 }
 
@@ -430,13 +431,13 @@ grpc_end2end_http_proxy* grpc_end2end_http_proxy_create() {
       grpc_tcp_server_create(NULL, proxy->channel_args, &proxy->server);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   // Bind to port.
-  struct sockaddr_in addr;
-  memset(&addr, 0, sizeof(addr));
-  addr.sin_family = AF_INET;
-  grpc_sockaddr_set_port((struct sockaddr*)&addr, proxy_port);
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  addr->sin_family = AF_INET;
+  grpc_sockaddr_set_port(&resolved_addr, proxy_port);
   int port;
-  error = grpc_tcp_server_add_port(proxy->server, (struct sockaddr*)&addr,
-                                   sizeof(addr), &port);
+  error = grpc_tcp_server_add_port(proxy->server, &resolved_addr, &port);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(port == proxy_port);
   // Start server.
diff --git a/test/core/end2end/fuzzers/api_fuzzer.c b/test/core/end2end/fuzzers/api_fuzzer.c
index 96ea82d95e..4e19b76014 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.c
+++ b/test/core/end2end/fuzzers/api_fuzzer.c
@@ -231,8 +231,8 @@ void my_resolve_address(grpc_exec_ctx *exec_ctx, const char *addr,
 // defined in tcp_client_posix.c
 extern void (*grpc_tcp_client_connect_impl)(
     grpc_exec_ctx *exec_ctx, grpc_closure *closure, grpc_endpoint **ep,
-    grpc_pollset_set *interested_parties, const struct sockaddr *addr,
-    size_t addr_len, gpr_timespec deadline);
+    grpc_pollset_set *interested_parties, const grpc_resolved_address *addr,
+    gpr_timespec deadline);
 
 static void sched_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
                           grpc_endpoint **ep, gpr_timespec deadline);
@@ -289,7 +289,7 @@ static void sched_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
 static void my_tcp_client_connect(grpc_exec_ctx *exec_ctx,
                                   grpc_closure *closure, grpc_endpoint **ep,
                                   grpc_pollset_set *interested_parties,
-                                  const struct sockaddr *addr, size_t addr_len,
+                                  const grpc_resolved_address *addr,
                                   gpr_timespec deadline) {
   sched_connect(exec_ctx, closure, ep, deadline);
 }
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index d3d6f5e9ce..0bbf10d475 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -39,19 +39,20 @@ import hashlib
 
 FixtureOptions = collections.namedtuple(
     'FixtureOptions',
-    'fullstack includes_proxy dns_resolver secure platforms ci_mac tracing exclude_configs')
+    'fullstack includes_proxy dns_resolver secure platforms ci_mac tracing exclude_configs exclude_iomgrs')
 default_unsecure_fixture_options = FixtureOptions(
-    True, False, True, False, ['windows', 'linux', 'mac', 'posix'], True, False, [])
+    True, False, True, False, ['windows', 'linux', 'mac', 'posix'], True, False, [], [])
 socketpair_unsecure_fixture_options = default_unsecure_fixture_options._replace(fullstack=False, dns_resolver=False)
 default_secure_fixture_options = default_unsecure_fixture_options._replace(secure=True)
-uds_fixture_options = default_unsecure_fixture_options._replace(dns_resolver=False, platforms=['linux', 'mac', 'posix'])
+uds_fixture_options = default_unsecure_fixture_options._replace(dns_resolver=False, platforms=['linux', 'mac', 'posix'], exclude_iomgrs=['uv'])
 fd_unsecure_fixture_options = default_unsecure_fixture_options._replace(
-    dns_resolver=False, fullstack=False, platforms=['linux', 'mac', 'posix'])
+    dns_resolver=False, fullstack=False, platforms=['linux', 'mac', 'posix'], exclude_iomgrs=['uv'])
 
 
 # maps fixture name to whether it requires the security library
 END2END_FIXTURES = {
     'h2_compress': default_unsecure_fixture_options,
+
     'h2_census': default_unsecure_fixture_options,
     'h2_load_reporting': default_unsecure_fixture_options,
     'h2_fakesec': default_secure_fixture_options._replace(ci_mac=False),
@@ -59,28 +60,31 @@ END2END_FIXTURES = {
     'h2_fd': fd_unsecure_fixture_options,
     'h2_full': default_unsecure_fixture_options,
     'h2_full+pipe': default_unsecure_fixture_options._replace(
-        platforms=['linux']),
+        platforms=['linux'], exclude_iomgrs=['uv']),
     'h2_full+trace': default_unsecure_fixture_options._replace(tracing=True),
-    'h2_http_proxy': default_unsecure_fixture_options._replace(ci_mac=False),
-    'h2_oauth2': default_secure_fixture_options._replace(ci_mac=False),
-    'h2_proxy': default_unsecure_fixture_options._replace(includes_proxy=True,
-                                                          ci_mac=False),
+    'h2_http_proxy': default_unsecure_fixture_options._replace(
+        ci_mac=False, exclude_iomgrs=['uv']),
+    'h2_oauth2': default_secure_fixture_options._replace(
+        ci_mac=False, exclude_iomgrs=['uv']),
+    'h2_proxy': default_unsecure_fixture_options._replace(
+        includes_proxy=True, ci_mac=False, exclude_iomgrs=['uv']),
     'h2_sockpair_1byte': socketpair_unsecure_fixture_options._replace(
-        ci_mac=False, exclude_configs=['msan']),
-    'h2_sockpair': socketpair_unsecure_fixture_options._replace(ci_mac=False),
+        ci_mac=False, exclude_configs=['msan'], exclude_iomgrs=['uv']),
+    'h2_sockpair': socketpair_unsecure_fixture_options._replace(
+        ci_mac=False, exclude_iomgrs=['uv']),
     'h2_sockpair+trace': socketpair_unsecure_fixture_options._replace(
-        ci_mac=False, tracing=True),
+        ci_mac=False, tracing=True, exclude_iomgrs=['uv']),
     'h2_ssl': default_secure_fixture_options,
     'h2_ssl_cert': default_secure_fixture_options,
-    'h2_ssl_proxy': default_secure_fixture_options._replace(includes_proxy=True,
-                                                            ci_mac=False),
+    'h2_ssl_proxy': default_secure_fixture_options._replace(
+        includes_proxy=True, ci_mac=False, exclude_iomgrs=['uv']),
     'h2_uds': uds_fixture_options,
 }
 
 TestOptions = collections.namedtuple(
     'TestOptions',
-    'needs_fullstack needs_dns proxyable secure traceable cpu_cost')
-default_test_options = TestOptions(False, False, True, False, True, 1.0)
+    'needs_fullstack needs_dns proxyable secure traceable cpu_cost exclude_iomgrs')
+default_test_options = TestOptions(False, False, True, False, True, 1.0, [])
 connectivity_test_options = default_test_options._replace(needs_fullstack=True)
 
 LOWCPU = 0.1
@@ -97,8 +101,8 @@ END2END_TESTS = {
     'cancel_in_a_vacuum': default_test_options._replace(cpu_cost=LOWCPU),
     'cancel_with_status': default_test_options._replace(cpu_cost=LOWCPU),
     'compressed_payload': default_test_options._replace(proxyable=False),
-    'connectivity': connectivity_test_options._replace(proxyable=False,
-                                                       cpu_cost=LOWCPU),
+    'connectivity': connectivity_test_options._replace(
+        proxyable=False, cpu_cost=LOWCPU, exclude_iomgrs=['uv']),
     'default_host': default_test_options._replace(needs_fullstack=True,
                                                   needs_dns=True),
     'disappearing_server': connectivity_test_options,
@@ -247,6 +251,8 @@ def main():
               'name': '%s_test' % f,
               'args': [t],
               'exclude_configs': END2END_FIXTURES[f].exclude_configs,
+              'exclude_iomgrs': list(set(END2END_FIXTURES[f].exclude_iomgrs) |
+                                     set(END2END_TESTS[t].exclude_iomgrs)),
               'platforms': END2END_FIXTURES[f].platforms,
               'ci_platforms': (END2END_FIXTURES[f].platforms
                                if END2END_FIXTURES[f].ci_mac else without(
@@ -262,6 +268,8 @@ def main():
               'name': '%s_nosec_test' % f,
               'args': [t],
               'exclude_configs': END2END_FIXTURES[f].exclude_configs,
+              'exclude_iomgrs': list(set(END2END_FIXTURES[f].exclude_iomgrs) |
+                                     set(END2END_TESTS[t].exclude_iomgrs)),
               'platforms': END2END_FIXTURES[f].platforms,
               'ci_platforms': (END2END_FIXTURES[f].platforms
                                if END2END_FIXTURES[f].ci_mac else without(
diff --git a/test/core/handshake/client_ssl.c b/test/core/handshake/client_ssl.c
new file mode 100644
index 0000000000..ee90f0b0bc
--- /dev/null
+++ b/test/core/handshake/client_ssl.c
@@ -0,0 +1,311 @@
+/*
+ *
+ * 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 <arpa/inet.h>
+#include <openssl/err.h>
+#include <openssl/ssl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/thd.h>
+#include "src/core/lib/iomgr/load_file.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+#define SSL_CERT_PATH "src/core/lib/tsi/test_creds/server1.pem"
+#define SSL_KEY_PATH "src/core/lib/tsi/test_creds/server1.key"
+#define SSL_CA_PATH "src/core/lib/tsi/test_creds/ca.pem"
+
+// Arguments for TLS server thread.
+typedef struct {
+  int socket;
+  char *alpn_preferred;
+} server_args;
+
+// From https://wiki.openssl.org/index.php/Simple_TLS_Server.
+static int create_socket(int port) {
+  int s;
+  struct sockaddr_in addr;
+
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons((uint16_t)port);
+  addr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+  s = socket(AF_INET, SOCK_STREAM, 0);
+  if (s < 0) {
+    perror("Unable to create socket");
+    return -1;
+  }
+
+  if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+    perror("Unable to bind");
+    gpr_log(GPR_ERROR, "Unable to bind to %d", port);
+    close(s);
+    return -1;
+  }
+
+  if (listen(s, 1) < 0) {
+    perror("Unable to listen");
+    close(s);
+    return -1;
+  }
+
+  return s;
+}
+
+// Server callback during ALPN negotiation. See man page for
+// SSL_CTX_set_alpn_select_cb.
+static int alpn_select_cb(SSL *ssl, const uint8_t **out, uint8_t *out_len,
+                          const uint8_t *in, unsigned in_len, void *arg) {
+  const uint8_t *alpn_preferred = (const uint8_t *)arg;
+
+  *out = alpn_preferred;
+  *out_len = (uint8_t)strlen((char *)alpn_preferred);
+
+  // Validate that the ALPN list includes "h2" and "grpc-exp", that "grpc-exp"
+  // precedes "h2".
+  bool grpc_exp_seen = false;
+  bool h2_seen = false;
+  const char *inp = (const char *)in;
+  for (int i = 0; i < (int)in_len; ++i) {
+    const size_t length = (size_t)*inp++;
+    if (length == strlen("grpc-exp") && strncmp(inp, "grpc-exp", length) == 0) {
+      grpc_exp_seen = true;
+      GPR_ASSERT(!h2_seen);
+    }
+    if (length == strlen("h2") && strncmp(inp, "h2", length) == 0) {
+      h2_seen = true;
+      GPR_ASSERT(grpc_exp_seen);
+    }
+    inp += length;
+  }
+
+  GPR_ASSERT(grpc_exp_seen);
+  GPR_ASSERT(h2_seen);
+
+  return SSL_TLSEXT_ERR_OK;
+}
+
+// Minimal TLS server. This is largely based on the example at
+// https://wiki.openssl.org/index.php/Simple_TLS_Server and the gRPC core
+// internals in src/core/lib/tsi/ssl_transport_security.c.
+static void server_thread(void *arg) {
+  const server_args *args = (server_args *)arg;
+
+  SSL_load_error_strings();
+  OpenSSL_add_ssl_algorithms();
+
+  const SSL_METHOD *method = TLSv1_2_server_method();
+  SSL_CTX *ctx = SSL_CTX_new(method);
+  if (!ctx) {
+    perror("Unable to create SSL context");
+    ERR_print_errors_fp(stderr);
+    abort();
+  }
+
+  // Load key pair.
+  if (SSL_CTX_use_certificate_file(ctx, SSL_CERT_PATH, SSL_FILETYPE_PEM) < 0) {
+    ERR_print_errors_fp(stderr);
+    abort();
+  }
+  if (SSL_CTX_use_PrivateKey_file(ctx, SSL_KEY_PATH, SSL_FILETYPE_PEM) < 0) {
+    ERR_print_errors_fp(stderr);
+    abort();
+  }
+
+  // Set the cipher list to match the one expressed in
+  // src/core/lib/tsi/ssl_transport_security.c.
+  const char *cipher_list =
+      "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-"
+      "SHA384:ECDHE-RSA-AES256-GCM-SHA384";
+  if (!SSL_CTX_set_cipher_list(ctx, cipher_list)) {
+    ERR_print_errors_fp(stderr);
+    gpr_log(GPR_ERROR, "Couldn't set server cipher list.");
+    abort();
+  }
+
+  // Register the ALPN selection callback.
+  SSL_CTX_set_alpn_select_cb(ctx, alpn_select_cb, args->alpn_preferred);
+
+  // bind/listen/accept at TCP layer.
+  const int sock = args->socket;
+  gpr_log(GPR_INFO, "Server listening");
+  struct sockaddr_in addr;
+  socklen_t len = sizeof(addr);
+  const int client = accept(sock, (struct sockaddr *)&addr, &len);
+  if (client < 0) {
+    perror("Unable to accept");
+    abort();
+  }
+
+  // Establish a SSL* and accept at SSL layer.
+  SSL *ssl = SSL_new(ctx);
+  GPR_ASSERT(ssl);
+  SSL_set_fd(ssl, client);
+  if (SSL_accept(ssl) <= 0) {
+    ERR_print_errors_fp(stderr);
+    gpr_log(GPR_ERROR, "Handshake failed.");
+  } else {
+    gpr_log(GPR_INFO, "Handshake successful.");
+  }
+
+  // Wait until the client drops its connection.
+  char buf;
+  while (SSL_read(ssl, &buf, sizeof(buf)) > 0)
+    ;
+
+  SSL_free(ssl);
+  close(client);
+  close(sock);
+  SSL_CTX_free(ctx);
+  EVP_cleanup();
+}
+
+// This test launches a minimal TLS server on a separate thread and then
+// establishes a TLS handshake via the core library to the server. The TLS
+// server validates ALPN aspects of the handshake and supplies the protocol
+// specified in the server_alpn_preferred argument to the client.
+static bool client_ssl_test(char *server_alpn_preferred) {
+  bool success = true;
+
+  grpc_init();
+
+  // Find a port we can bind to. Retries added to handle flakes in port server
+  // and port picking.
+  int port = -1;
+  int server_socket = -1;
+  int socket_retries = 10;
+  while (server_socket == -1 && socket_retries-- > 0) {
+    port = grpc_pick_unused_port_or_die();
+    server_socket = create_socket(port);
+    if (server_socket == -1) {
+      sleep(1);
+    }
+  }
+  GPR_ASSERT(server_socket > 0);
+
+  // Launch the TLS server thread.
+  gpr_thd_options thdopt = gpr_thd_options_default();
+  gpr_thd_id thdid;
+  gpr_thd_options_set_joinable(&thdopt);
+  server_args args = {.socket = server_socket,
+                      .alpn_preferred = server_alpn_preferred};
+  GPR_ASSERT(gpr_thd_new(&thdid, server_thread, &args, &thdopt));
+
+  // Load key pair and establish client SSL credentials.
+  grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
+  gpr_slice ca_slice, cert_slice, key_slice;
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
+                               grpc_load_file(SSL_CA_PATH, 1, &ca_slice)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
+                               grpc_load_file(SSL_CERT_PATH, 1, &cert_slice)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
+                               grpc_load_file(SSL_KEY_PATH, 1, &key_slice)));
+  const char *ca_cert = (const char *)GPR_SLICE_START_PTR(ca_slice);
+  pem_key_cert_pair.private_key = (const char *)GPR_SLICE_START_PTR(key_slice);
+  pem_key_cert_pair.cert_chain = (const char *)GPR_SLICE_START_PTR(cert_slice);
+  grpc_channel_credentials *ssl_creds =
+      grpc_ssl_credentials_create(ca_cert, &pem_key_cert_pair, NULL);
+
+  // Establish a channel pointing at the TLS server. Since the gRPC runtime is
+  // lazy, this won't necessarily establish a connection yet.
+  char *target;
+  gpr_asprintf(&target, "127.0.0.1:%d", port);
+  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
+                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
+                                {"foo.test.google.fr"}};
+  grpc_channel_args grpc_args;
+  grpc_args.num_args = 1;
+  grpc_args.args = &ssl_name_override;
+  grpc_channel *channel =
+      grpc_secure_channel_create(ssl_creds, target, &grpc_args, NULL);
+  GPR_ASSERT(channel);
+  gpr_free(target);
+
+  // Initially the channel will be idle, the
+  // grpc_channel_check_connectivity_state triggers an attempt to connect.
+  GPR_ASSERT(grpc_channel_check_connectivity_state(
+                 channel, 1 /* try_to_connect */) == GRPC_CHANNEL_IDLE);
+
+  // Wait a bounded number of times for the channel to be ready. When the
+  // channel is ready, the initial TLS handshake will have successfully
+  // completed and we know that the client's ALPN list satisfied the server.
+  int retries = 10;
+  grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
+  grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
+  while (state != GRPC_CHANNEL_READY && retries-- > 0) {
+    grpc_channel_watch_connectivity_state(
+        channel, state, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3), cq, NULL);
+    gpr_timespec cq_deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5);
+    grpc_event ev = grpc_completion_queue_next(cq, cq_deadline, NULL);
+    GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+    state =
+        grpc_channel_check_connectivity_state(channel, 0 /* try_to_connect */);
+  }
+  grpc_completion_queue_destroy(cq);
+  if (retries < 0) {
+    success = false;
+  }
+
+  grpc_channel_destroy(channel);
+  grpc_channel_credentials_release(ssl_creds);
+  gpr_slice_unref(cert_slice);
+  gpr_slice_unref(key_slice);
+  gpr_slice_unref(ca_slice);
+
+  gpr_thd_join(thdid);
+
+  grpc_shutdown();
+
+  return success;
+}
+
+int main(int argc, char *argv[]) {
+  // Handshake succeeeds when the server has grpc-exp as the ALPN preference.
+  GPR_ASSERT(client_ssl_test("grpc-exp"));
+  // Handshake succeeeds when the server has h2 as the ALPN preference. This
+  // covers legacy gRPC servers which don't support grpc-exp.
+  GPR_ASSERT(client_ssl_test("h2"));
+  // Handshake fails when the server uses a fake protocol as its ALPN
+  // preference. This validates the client is correctly validating ALPN returns
+  // and sanity checks the client_ssl_test.
+  GPR_ASSERT(!client_ssl_test("foo"));
+  return 0;
+}
diff --git a/test/core/handshake/server_ssl.c b/test/core/handshake/server_ssl.c
new file mode 100644
index 0000000000..3e89f8e265
--- /dev/null
+++ b/test/core/handshake/server_ssl.c
@@ -0,0 +1,270 @@
+/*
+ *
+ * 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 <arpa/inet.h>
+#include <openssl/err.h>
+#include <openssl/ssl.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include "src/core/lib/iomgr/load_file.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+#define SSL_CERT_PATH "src/core/lib/tsi/test_creds/server1.pem"
+#define SSL_KEY_PATH "src/core/lib/tsi/test_creds/server1.key"
+#define SSL_CA_PATH "src/core/lib/tsi/test_creds/ca.pem"
+
+// Handshake completed signal to server thread.
+static gpr_event client_handshake_complete;
+
+static int create_socket(int port) {
+  int s;
+  struct sockaddr_in addr;
+
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons((uint16_t)port);
+  addr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+  s = socket(AF_INET, SOCK_STREAM, 0);
+  if (s < 0) {
+    perror("Unable to create socket");
+    return -1;
+  }
+
+  if (connect(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+    perror("Unable to connect");
+    return -1;
+  }
+
+  return s;
+}
+
+// Simple gRPC server. This listens until client_handshake_complete occurs.
+static void server_thread(void *arg) {
+  const int port = *(int *)arg;
+
+  // Load key pair and establish server SSL credentials.
+  grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
+  gpr_slice ca_slice, cert_slice, key_slice;
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
+                               grpc_load_file(SSL_CA_PATH, 1, &ca_slice)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
+                               grpc_load_file(SSL_CERT_PATH, 1, &cert_slice)));
+  GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
+                               grpc_load_file(SSL_KEY_PATH, 1, &key_slice)));
+  const char *ca_cert = (const char *)GPR_SLICE_START_PTR(ca_slice);
+  pem_key_cert_pair.private_key = (const char *)GPR_SLICE_START_PTR(key_slice);
+  pem_key_cert_pair.cert_chain = (const char *)GPR_SLICE_START_PTR(cert_slice);
+  grpc_server_credentials *ssl_creds = grpc_ssl_server_credentials_create(
+      ca_cert, &pem_key_cert_pair, 1, 0, NULL);
+
+  // Start server listening on local port.
+  char *addr;
+  gpr_asprintf(&addr, "127.0.0.1:%d", port);
+  grpc_server *server = grpc_server_create(NULL, NULL);
+  GPR_ASSERT(grpc_server_add_secure_http2_port(server, addr, ssl_creds));
+  free(addr);
+
+  grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
+
+  grpc_server_register_completion_queue(server, cq, NULL);
+  grpc_server_start(server);
+
+  // Wait a bounded number of time until client_handshake_complete is set,
+  // sleeping between polls.
+  int retries = 10;
+  while (!gpr_event_get(&client_handshake_complete) && retries-- > 0) {
+    const gpr_timespec cq_deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1);
+    grpc_event ev = grpc_completion_queue_next(cq, cq_deadline, NULL);
+    GPR_ASSERT(ev.type == GRPC_QUEUE_TIMEOUT);
+  }
+
+  gpr_log(GPR_INFO, "Shutting down server");
+  grpc_server_shutdown_and_notify(server, cq, NULL);
+  grpc_completion_queue_shutdown(cq);
+
+  const gpr_timespec cq_deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5);
+  grpc_event ev = grpc_completion_queue_next(cq, cq_deadline, NULL);
+  GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
+
+  grpc_server_destroy(server);
+  grpc_completion_queue_destroy(cq);
+  grpc_server_credentials_release(ssl_creds);
+  gpr_slice_unref(cert_slice);
+  gpr_slice_unref(key_slice);
+  gpr_slice_unref(ca_slice);
+}
+
+// This test launches a gRPC server on a separate thread and then establishes a
+// TLS handshake via a minimal TLS client. The TLS client has configurable (via
+// alpn_list) ALPN settings and can probe at the supported ALPN preferences
+// using this (via alpn_expected).
+static bool server_ssl_test(const char *alpn_list[], unsigned int alpn_list_len,
+                            const char *alpn_expected) {
+  bool success = true;
+
+  grpc_init();
+  int port = grpc_pick_unused_port_or_die();
+  gpr_event_init(&client_handshake_complete);
+
+  // Launch the gRPC server thread.
+  gpr_thd_options thdopt = gpr_thd_options_default();
+  gpr_thd_id thdid;
+  gpr_thd_options_set_joinable(&thdopt);
+  GPR_ASSERT(gpr_thd_new(&thdid, server_thread, &port, &thdopt));
+
+  SSL_load_error_strings();
+  OpenSSL_add_ssl_algorithms();
+
+  const SSL_METHOD *method = TLSv1_2_client_method();
+  SSL_CTX *ctx = SSL_CTX_new(method);
+  if (!ctx) {
+    perror("Unable to create SSL context");
+    ERR_print_errors_fp(stderr);
+    abort();
+  }
+
+  // Load key pair.
+  if (SSL_CTX_use_certificate_file(ctx, SSL_CERT_PATH, SSL_FILETYPE_PEM) < 0) {
+    ERR_print_errors_fp(stderr);
+    abort();
+  }
+  if (SSL_CTX_use_PrivateKey_file(ctx, SSL_KEY_PATH, SSL_FILETYPE_PEM) < 0) {
+    ERR_print_errors_fp(stderr);
+    abort();
+  }
+
+  // Set the cipher list to match the one expressed in
+  // src/core/lib/tsi/ssl_transport_security.c.
+  const char *cipher_list =
+      "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-"
+      "SHA384:ECDHE-RSA-AES256-GCM-SHA384";
+  if (!SSL_CTX_set_cipher_list(ctx, cipher_list)) {
+    ERR_print_errors_fp(stderr);
+    gpr_log(GPR_ERROR, "Couldn't set server cipher list.");
+    abort();
+  }
+
+  // Configure ALPN list the client will send to the server. This must match the
+  // wire format, see documentation for SSL_CTX_set_alpn_protos.
+  unsigned int alpn_protos_len = alpn_list_len;
+  for (unsigned int i = 0; i < alpn_list_len; ++i) {
+    alpn_protos_len += (unsigned int)strlen(alpn_list[i]);
+  }
+  unsigned char *alpn_protos = gpr_malloc(alpn_protos_len);
+  unsigned char *p = alpn_protos;
+  for (unsigned int i = 0; i < alpn_list_len; ++i) {
+    const uint8_t len = (uint8_t)strlen(alpn_list[i]);
+    *p++ = len;
+    memcpy(p, alpn_list[i], len);
+    p += len;
+  }
+  GPR_ASSERT(SSL_CTX_set_alpn_protos(ctx, alpn_protos, alpn_protos_len) == 0);
+
+  // Try and connect to server. We allow a bounded number of retries as we might
+  // be racing with the server setup on its separate thread.
+  int retries = 10;
+  int sock = -1;
+  while (sock == -1 && retries-- > 0) {
+    sock = create_socket(port);
+    if (sock < 0) {
+      sleep(1);
+    }
+  }
+  GPR_ASSERT(sock > 0);
+  gpr_log(GPR_INFO, "Connected to server on port %d", port);
+
+  // Establish a SSL* and connect at SSL layer.
+  SSL *ssl = SSL_new(ctx);
+  GPR_ASSERT(ssl);
+  SSL_set_fd(ssl, sock);
+  if (SSL_connect(ssl) <= 0) {
+    ERR_print_errors_fp(stderr);
+    gpr_log(GPR_ERROR, "Handshake failed.");
+    success = false;
+  } else {
+    gpr_log(GPR_INFO, "Handshake successful.");
+    // Validate ALPN preferred by server matches alpn_expected.
+    const unsigned char *alpn_selected;
+    unsigned int alpn_selected_len;
+    SSL_get0_alpn_selected(ssl, &alpn_selected, &alpn_selected_len);
+    if (strlen(alpn_expected) != alpn_selected_len ||
+        strncmp((const char *)alpn_selected, alpn_expected,
+                alpn_selected_len) != 0) {
+      gpr_log(GPR_ERROR, "Unexpected ALPN protocol preference");
+      success = false;
+    }
+  }
+  gpr_event_set(&client_handshake_complete, &client_handshake_complete);
+
+  SSL_free(ssl);
+  gpr_free(alpn_protos);
+  SSL_CTX_free(ctx);
+  EVP_cleanup();
+  close(sock);
+
+  gpr_thd_join(thdid);
+
+  grpc_shutdown();
+
+  return success;
+}
+
+int main(int argc, char *argv[]) {
+  // Handshake succeeeds when the client supplies the standard ALPN list.
+  const char *full_alpn_list[] = {"grpc-exp", "h2"};
+  GPR_ASSERT(server_ssl_test(full_alpn_list, 2, "grpc-exp"));
+  // Handshake succeeeds when the client supplies only h2 as the ALPN list. This
+  // covers legacy gRPC clients which don't support grpc-exp.
+  const char *h2_only_alpn_list[] = {"h2"};
+  GPR_ASSERT(server_ssl_test(h2_only_alpn_list, 1, "h2"));
+  // Handshake succeeds when the client supplies superfluous ALPN entries and
+  // also when h2 precedes gprc-exp.
+  const char *extra_alpn_list[] = {"foo", "h2", "bar", "grpc-exp"};
+  GPR_ASSERT(server_ssl_test(extra_alpn_list, 4, "h2"));
+  // Handshake fails when the client uses a fake protocol as its only ALPN
+  // preference. This validates the server is correctly validating ALPN
+  // and sanity checks the server_ssl_test.
+  const char *fake_alpn_list[] = {"foo"};
+  GPR_ASSERT(!server_ssl_test(fake_alpn_list, 1, "foo"));
+  return 0;
+}
diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
index 2547dc9871..564b05d7f4 100644
--- a/test/core/iomgr/ev_epoll_linux_test.c
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -30,10 +30,10 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
-#include <grpc/support/port_platform.h>
+#include "src/core/lib/iomgr/port.h"
 
 /* This test only relevant on linux systems where epoll() is available */
-#ifdef GPR_LINUX_EPOLL
+#ifdef GRPC_LINUX_EPOLL
 #include "src/core/lib/iomgr/ev_epoll_linux.h"
 #include "src/core/lib/iomgr/ev_posix.h"
 
@@ -239,6 +239,6 @@ int main(int argc, char **argv) {
   grpc_iomgr_shutdown();
   return 0;
 }
-#else /* defined(GPR_LINUX_EPOLL) */
+#else /* defined(GRPC_LINUX_EPOLL) */
 int main(int argc, char **argv) { return 0; }
-#endif /* !defined(GPR_LINUX_EPOLL) */
+#endif /* !defined(GRPC_LINUX_EPOLL) */
diff --git a/test/core/iomgr/fd_posix_test.c b/test/core/iomgr/fd_posix_test.c
index 62dc24d85a..6166699fe6 100644
--- a/test/core/iomgr/fd_posix_test.c
+++ b/test/core/iomgr/fd_posix_test.c
@@ -31,6 +31,11 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+// This test won't work except with posix sockets enabled
+#ifdef GRPC_POSIX_SOCKET
+
 #include "src/core/lib/iomgr/ev_posix.h"
 
 #include <ctype.h>
@@ -548,3 +553,9 @@ int main(int argc, char **argv) {
   grpc_iomgr_shutdown();
   return 0;
 }
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/test/core/iomgr/resolve_address_test.c b/test/core/iomgr/resolve_address_test.c
index 4417d96043..2dd0d88b3f 100644
--- a/test/core/iomgr/resolve_address_test.c
+++ b/test/core/iomgr/resolve_address_test.c
@@ -36,6 +36,7 @@
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
 #include "src/core/lib/iomgr/executor.h"
+#include "src/core/lib/iomgr/iomgr.h"
 #include "test/core/util/test_config.h"
 
 static gpr_timespec test_deadline(void) {
diff --git a/test/core/iomgr/sockaddr_utils_test.c b/test/core/iomgr/sockaddr_utils_test.c
index a330314443..8569c697fe 100644
--- a/test/core/iomgr/sockaddr_utils_test.c
+++ b/test/core/iomgr/sockaddr_utils_test.c
@@ -31,6 +31,11 @@
  *
  */
 
+/* With the addition of a libuv endpoint, sockaddr.h now includes uv.h when
+   using that endpoint. Because of various transitive includes in uv.h,
+   including windows.h on Windows, uv.h must be included before other system
+   headers. Therefore, sockaddr.h must always be included first */
+#include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 
 #include <errno.h>
@@ -41,24 +46,28 @@
 #include <grpc/support/port_platform.h>
 #include "test/core/util/test_config.h"
 
-static struct sockaddr_in make_addr4(const uint8_t *data, size_t data_len) {
-  struct sockaddr_in addr4;
-  memset(&addr4, 0, sizeof(addr4));
-  addr4.sin_family = AF_INET;
-  GPR_ASSERT(data_len == sizeof(addr4.sin_addr.s_addr));
-  memcpy(&addr4.sin_addr.s_addr, data, data_len);
-  addr4.sin_port = htons(12345);
-  return addr4;
+static grpc_resolved_address make_addr4(const uint8_t *data, size_t data_len) {
+  grpc_resolved_address resolved_addr4;
+  struct sockaddr_in *addr4 = (struct sockaddr_in *)resolved_addr4.addr;
+  memset(&resolved_addr4, 0, sizeof(resolved_addr4));
+  addr4->sin_family = AF_INET;
+  GPR_ASSERT(data_len == sizeof(addr4->sin_addr.s_addr));
+  memcpy(&addr4->sin_addr.s_addr, data, data_len);
+  addr4->sin_port = htons(12345);
+  resolved_addr4.len = sizeof(struct sockaddr_in);
+  return resolved_addr4;
 }
 
-static struct sockaddr_in6 make_addr6(const uint8_t *data, size_t data_len) {
-  struct sockaddr_in6 addr6;
-  memset(&addr6, 0, sizeof(addr6));
-  addr6.sin6_family = AF_INET6;
-  GPR_ASSERT(data_len == sizeof(addr6.sin6_addr.s6_addr));
-  memcpy(&addr6.sin6_addr.s6_addr, data, data_len);
-  addr6.sin6_port = htons(12345);
-  return addr6;
+static grpc_resolved_address make_addr6(const uint8_t *data, size_t data_len) {
+  grpc_resolved_address resolved_addr6;
+  struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)resolved_addr6.addr;
+  memset(&resolved_addr6, 0, sizeof(resolved_addr6));
+  addr6->sin6_family = AF_INET6;
+  GPR_ASSERT(data_len == sizeof(addr6->sin6_addr.s6_addr));
+  memcpy(&addr6->sin6_addr.s6_addr, data, data_len);
+  addr6->sin6_port = htons(12345);
+  resolved_addr6.len = sizeof(struct sockaddr_in6);
+  return resolved_addr6;
 }
 
 static const uint8_t kMapped[] = {0, 0, 0,    0,    0,   0, 0, 0,
@@ -72,102 +81,96 @@ static const uint8_t kIPv6[] = {0x20, 0x01, 0x0d, 0xb8, 0, 0, 0, 0,
                                 0,    0,    0,    0,    0, 0, 0, 1};
 
 static void test_sockaddr_is_v4mapped(void) {
-  struct sockaddr_in input4;
-  struct sockaddr_in6 input6;
-  struct sockaddr_in output4;
-  struct sockaddr_in expect4;
+  grpc_resolved_address input4;
+  grpc_resolved_address input6;
+  grpc_resolved_address output4;
+  grpc_resolved_address expect4;
 
   gpr_log(GPR_INFO, "%s", "test_sockaddr_is_v4mapped");
 
   /* v4mapped input should succeed. */
   input6 = make_addr6(kMapped, sizeof(kMapped));
-  GPR_ASSERT(grpc_sockaddr_is_v4mapped((const struct sockaddr *)&input6, NULL));
-  GPR_ASSERT(
-      grpc_sockaddr_is_v4mapped((const struct sockaddr *)&input6, &output4));
+  GPR_ASSERT(grpc_sockaddr_is_v4mapped(&input6, NULL));
+  GPR_ASSERT(grpc_sockaddr_is_v4mapped(&input6, &output4));
   expect4 = make_addr4(kIPv4, sizeof(kIPv4));
   GPR_ASSERT(memcmp(&expect4, &output4, sizeof(expect4)) == 0);
 
   /* Non-v4mapped input should fail. */
   input6 = make_addr6(kNotQuiteMapped, sizeof(kNotQuiteMapped));
-  GPR_ASSERT(
-      !grpc_sockaddr_is_v4mapped((const struct sockaddr *)&input6, NULL));
-  GPR_ASSERT(
-      !grpc_sockaddr_is_v4mapped((const struct sockaddr *)&input6, &output4));
+  GPR_ASSERT(!grpc_sockaddr_is_v4mapped(&input6, NULL));
+  GPR_ASSERT(!grpc_sockaddr_is_v4mapped(&input6, &output4));
   /* Output is unchanged. */
   GPR_ASSERT(memcmp(&expect4, &output4, sizeof(expect4)) == 0);
 
   /* Plain IPv4 input should also fail. */
   input4 = make_addr4(kIPv4, sizeof(kIPv4));
-  GPR_ASSERT(
-      !grpc_sockaddr_is_v4mapped((const struct sockaddr *)&input4, NULL));
+  GPR_ASSERT(!grpc_sockaddr_is_v4mapped(&input4, NULL));
 }
 
 static void test_sockaddr_to_v4mapped(void) {
-  struct sockaddr_in input4;
-  struct sockaddr_in6 input6;
-  struct sockaddr_in6 output6;
-  struct sockaddr_in6 expect6;
+  grpc_resolved_address input4;
+  grpc_resolved_address input6;
+  grpc_resolved_address output6;
+  grpc_resolved_address expect6;
 
   gpr_log(GPR_INFO, "%s", "test_sockaddr_to_v4mapped");
 
   /* IPv4 input should succeed. */
   input4 = make_addr4(kIPv4, sizeof(kIPv4));
-  GPR_ASSERT(
-      grpc_sockaddr_to_v4mapped((const struct sockaddr *)&input4, &output6));
+  GPR_ASSERT(grpc_sockaddr_to_v4mapped(&input4, &output6));
   expect6 = make_addr6(kMapped, sizeof(kMapped));
   GPR_ASSERT(memcmp(&expect6, &output6, sizeof(output6)) == 0);
 
   /* IPv6 input should fail. */
   input6 = make_addr6(kIPv6, sizeof(kIPv6));
-  GPR_ASSERT(
-      !grpc_sockaddr_to_v4mapped((const struct sockaddr *)&input6, &output6));
+  GPR_ASSERT(!grpc_sockaddr_to_v4mapped(&input6, &output6));
   /* Output is unchanged. */
   GPR_ASSERT(memcmp(&expect6, &output6, sizeof(output6)) == 0);
 
   /* Already-v4mapped input should also fail. */
   input6 = make_addr6(kMapped, sizeof(kMapped));
-  GPR_ASSERT(
-      !grpc_sockaddr_to_v4mapped((const struct sockaddr *)&input6, &output6));
+  GPR_ASSERT(!grpc_sockaddr_to_v4mapped(&input6, &output6));
 }
 
 static void test_sockaddr_is_wildcard(void) {
-  struct sockaddr_in wild4;
-  struct sockaddr_in6 wild6;
-  struct sockaddr_in6 wild_mapped;
-  struct sockaddr dummy;
+  grpc_resolved_address wild4;
+  grpc_resolved_address wild6;
+  grpc_resolved_address wild_mapped;
+  grpc_resolved_address dummy;
+  struct sockaddr_in *wild4_addr;
+  struct sockaddr_in6 *wild6_addr;
+  struct sockaddr_in6 *wild_mapped_addr;
   int port;
 
   gpr_log(GPR_INFO, "%s", "test_sockaddr_is_wildcard");
 
   /* Generate wildcards. */
   grpc_sockaddr_make_wildcards(555, &wild4, &wild6);
-  GPR_ASSERT(
-      grpc_sockaddr_to_v4mapped((const struct sockaddr *)&wild4, &wild_mapped));
+  GPR_ASSERT(grpc_sockaddr_to_v4mapped(&wild4, &wild_mapped));
 
   /* Test 0.0.0.0:555 */
   port = -1;
-  GPR_ASSERT(grpc_sockaddr_is_wildcard((const struct sockaddr *)&wild4, &port));
+  GPR_ASSERT(grpc_sockaddr_is_wildcard(&wild4, &port));
   GPR_ASSERT(port == 555);
-  memset(&wild4.sin_addr.s_addr, 0xbd, 1);
-  GPR_ASSERT(
-      !grpc_sockaddr_is_wildcard((const struct sockaddr *)&wild4, &port));
+  wild4_addr = (struct sockaddr_in *)&wild4.addr;
+  memset(&wild4_addr->sin_addr.s_addr, 0xbd, 1);
+  GPR_ASSERT(!grpc_sockaddr_is_wildcard(&wild4, &port));
 
   /* Test [::]:555 */
   port = -1;
-  GPR_ASSERT(grpc_sockaddr_is_wildcard((const struct sockaddr *)&wild6, &port));
+  GPR_ASSERT(grpc_sockaddr_is_wildcard(&wild6, &port));
   GPR_ASSERT(port == 555);
-  memset(&wild6.sin6_addr.s6_addr, 0xbd, 1);
-  GPR_ASSERT(
-      !grpc_sockaddr_is_wildcard((const struct sockaddr *)&wild6, &port));
+  wild6_addr = (struct sockaddr_in6 *)&wild6.addr;
+  memset(&wild6_addr->sin6_addr.s6_addr, 0xbd, 1);
+  GPR_ASSERT(!grpc_sockaddr_is_wildcard(&wild6, &port));
 
   /* Test [::ffff:0.0.0.0]:555 */
   port = -1;
-  GPR_ASSERT(
-      grpc_sockaddr_is_wildcard((const struct sockaddr *)&wild_mapped, &port));
+  GPR_ASSERT(grpc_sockaddr_is_wildcard(&wild_mapped, &port));
   GPR_ASSERT(port == 555);
-  memset(&wild_mapped.sin6_addr.s6_addr, 0xbd, 1);
-  GPR_ASSERT(
-      !grpc_sockaddr_is_wildcard((const struct sockaddr *)&wild_mapped, &port));
+  wild_mapped_addr = (struct sockaddr_in6 *)&wild_mapped.addr;
+  memset(&wild_mapped_addr->sin6_addr.s6_addr, 0xbd, 1);
+  GPR_ASSERT(!grpc_sockaddr_is_wildcard(&wild_mapped, &port));
 
   /* Test AF_UNSPEC. */
   port = -1;
@@ -176,12 +179,12 @@ static void test_sockaddr_is_wildcard(void) {
   GPR_ASSERT(port == -1);
 }
 
-static void expect_sockaddr_str(const char *expected, void *addr,
-                                int normalize) {
+static void expect_sockaddr_str(const char *expected,
+                                grpc_resolved_address *addr, int normalize) {
   int result;
   char *str;
   gpr_log(GPR_INFO, "  expect_sockaddr_str(%s)", expected);
-  result = grpc_sockaddr_to_string(&str, (struct sockaddr *)addr, normalize);
+  result = grpc_sockaddr_to_string(&str, addr, normalize);
   GPR_ASSERT(str != NULL);
   GPR_ASSERT(result >= 0);
   GPR_ASSERT((size_t)result == strlen(str));
@@ -189,19 +192,21 @@ static void expect_sockaddr_str(const char *expected, void *addr,
   gpr_free(str);
 }
 
-static void expect_sockaddr_uri(const char *expected, void *addr) {
+static void expect_sockaddr_uri(const char *expected,
+                                grpc_resolved_address *addr) {
   char *str;
   gpr_log(GPR_INFO, "  expect_sockaddr_uri(%s)", expected);
-  str = grpc_sockaddr_to_uri((struct sockaddr *)addr);
+  str = grpc_sockaddr_to_uri(addr);
   GPR_ASSERT(str != NULL);
   GPR_ASSERT(strcmp(expected, str) == 0);
   gpr_free(str);
 }
 
 static void test_sockaddr_to_string(void) {
-  struct sockaddr_in input4;
-  struct sockaddr_in6 input6;
-  struct sockaddr dummy;
+  grpc_resolved_address input4;
+  grpc_resolved_address input6;
+  grpc_resolved_address dummy;
+  struct sockaddr *dummy_addr;
 
   gpr_log(GPR_INFO, "%s", "test_sockaddr_to_string");
 
@@ -228,7 +233,8 @@ static void test_sockaddr_to_string(void) {
   expect_sockaddr_uri("ipv6:[::fffe:c000:263]:12345", &input6);
 
   memset(&dummy, 0, sizeof(dummy));
-  dummy.sa_family = 123;
+  dummy_addr = (struct sockaddr *)dummy.addr;
+  dummy_addr->sa_family = 123;
   expect_sockaddr_str("(sockaddr family=123)", &dummy, 0);
   expect_sockaddr_str("(sockaddr family=123)", &dummy, 1);
   GPR_ASSERT(grpc_sockaddr_to_uri(&dummy) == NULL);
@@ -237,24 +243,26 @@ static void test_sockaddr_to_string(void) {
 }
 
 static void test_sockaddr_set_get_port(void) {
-  struct sockaddr_in input4;
-  struct sockaddr_in6 input6;
-  struct sockaddr dummy;
+  grpc_resolved_address input4;
+  grpc_resolved_address input6;
+  grpc_resolved_address dummy;
+  struct sockaddr *dummy_addr;
 
   gpr_log(GPR_DEBUG, "test_sockaddr_set_get_port");
 
   input4 = make_addr4(kIPv4, sizeof(kIPv4));
-  GPR_ASSERT(grpc_sockaddr_get_port((struct sockaddr *)&input4) == 12345);
-  GPR_ASSERT(grpc_sockaddr_set_port((struct sockaddr *)&input4, 54321));
-  GPR_ASSERT(grpc_sockaddr_get_port((struct sockaddr *)&input4) == 54321);
+  GPR_ASSERT(grpc_sockaddr_get_port(&input4) == 12345);
+  GPR_ASSERT(grpc_sockaddr_set_port(&input4, 54321));
+  GPR_ASSERT(grpc_sockaddr_get_port(&input4) == 54321);
 
   input6 = make_addr6(kIPv6, sizeof(kIPv6));
-  GPR_ASSERT(grpc_sockaddr_get_port((struct sockaddr *)&input6) == 12345);
-  GPR_ASSERT(grpc_sockaddr_set_port((struct sockaddr *)&input6, 54321));
-  GPR_ASSERT(grpc_sockaddr_get_port((struct sockaddr *)&input6) == 54321);
+  GPR_ASSERT(grpc_sockaddr_get_port(&input6) == 12345);
+  GPR_ASSERT(grpc_sockaddr_set_port(&input6, 54321));
+  GPR_ASSERT(grpc_sockaddr_get_port(&input6) == 54321);
 
   memset(&dummy, 0, sizeof(dummy));
-  dummy.sa_family = 123;
+  dummy_addr = (struct sockaddr *)dummy.addr;
+  dummy_addr->sa_family = 123;
   GPR_ASSERT(grpc_sockaddr_get_port(&dummy) == 0);
   GPR_ASSERT(grpc_sockaddr_set_port(&dummy, 1234) == 0);
 }
diff --git a/test/core/iomgr/socket_utils_test.c b/test/core/iomgr/socket_utils_test.c
index 297531c44d..67bc914c15 100644
--- a/test/core/iomgr/socket_utils_test.c
+++ b/test/core/iomgr/socket_utils_test.c
@@ -31,7 +31,11 @@
  *
  */
 
-#include <grpc/support/port_platform.h>
+#include "src/core/lib/iomgr/port.h"
+
+// This test won't work except with posix sockets enabled
+#ifdef GRPC_POSIX_SOCKET
+
 #include "src/core/lib/iomgr/socket_utils_posix.h"
 
 #include <errno.h>
@@ -68,3 +72,9 @@ int main(int argc, char **argv) {
 
   return 0;
 }
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/test/core/iomgr/tcp_client_posix_test.c b/test/core/iomgr/tcp_client_posix_test.c
index d0c1047423..6c6962ed7a 100644
--- a/test/core/iomgr/tcp_client_posix_test.c
+++ b/test/core/iomgr/tcp_client_posix_test.c
@@ -85,8 +85,8 @@ static void must_fail(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
 }
 
 void test_succeeds(void) {
-  struct sockaddr_in addr;
-  socklen_t addr_len = sizeof(addr);
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   int svr_fd;
   int r;
   int connections_complete_before;
@@ -95,13 +95,15 @@ void test_succeeds(void) {
 
   gpr_log(GPR_DEBUG, "test_succeeds");
 
-  memset(&addr, 0, sizeof(addr));
-  addr.sin_family = AF_INET;
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  resolved_addr.len = sizeof(struct sockaddr_in);
+  addr->sin_family = AF_INET;
 
   /* create a dummy server */
   svr_fd = socket(AF_INET, SOCK_STREAM, 0);
   GPR_ASSERT(svr_fd >= 0);
-  GPR_ASSERT(0 == bind(svr_fd, (struct sockaddr *)&addr, addr_len));
+  GPR_ASSERT(
+      0 == bind(svr_fd, (struct sockaddr *)addr, (socklen_t)resolved_addr.len));
   GPR_ASSERT(0 == listen(svr_fd, 1));
 
   gpr_mu_lock(g_mu);
@@ -109,16 +111,17 @@ void test_succeeds(void) {
   gpr_mu_unlock(g_mu);
 
   /* connect to it */
-  GPR_ASSERT(getsockname(svr_fd, (struct sockaddr *)&addr, &addr_len) == 0);
+  GPR_ASSERT(getsockname(svr_fd, (struct sockaddr *)addr,
+                         (socklen_t *)&resolved_addr.len) == 0);
   grpc_closure_init(&done, must_succeed, NULL);
   grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, g_pollset_set,
-                          (struct sockaddr *)&addr, addr_len,
-                          gpr_inf_future(GPR_CLOCK_REALTIME));
+                          &resolved_addr, gpr_inf_future(GPR_CLOCK_REALTIME));
 
   /* await the connection */
   do {
-    addr_len = sizeof(addr);
-    r = accept(svr_fd, (struct sockaddr *)&addr, &addr_len);
+    resolved_addr.len = sizeof(addr);
+    r = accept(svr_fd, (struct sockaddr *)addr,
+               (socklen_t *)&resolved_addr.len);
   } while (r == -1 && errno == EINTR);
   GPR_ASSERT(r >= 0);
   close(r);
@@ -143,16 +146,17 @@ void test_succeeds(void) {
 }
 
 void test_fails(void) {
-  struct sockaddr_in addr;
-  socklen_t addr_len = sizeof(addr);
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   int connections_complete_before;
   grpc_closure done;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   gpr_log(GPR_DEBUG, "test_fails");
 
-  memset(&addr, 0, sizeof(addr));
-  addr.sin_family = AF_INET;
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  resolved_addr.len = sizeof(struct sockaddr_in);
+  addr->sin_family = AF_INET;
 
   gpr_mu_lock(g_mu);
   connections_complete_before = g_connections_complete;
@@ -161,8 +165,7 @@ void test_fails(void) {
   /* connect to a broken address */
   grpc_closure_init(&done, must_fail, NULL);
   grpc_tcp_client_connect(&exec_ctx, &done, &g_connecting, g_pollset_set,
-                          (struct sockaddr *)&addr, addr_len,
-                          gpr_inf_future(GPR_CLOCK_REALTIME));
+                          &resolved_addr, gpr_inf_future(GPR_CLOCK_REALTIME));
 
   gpr_mu_lock(g_mu);
 
diff --git a/test/core/iomgr/tcp_posix_test.c b/test/core/iomgr/tcp_posix_test.c
index 42614567ca..d998958744 100644
--- a/test/core/iomgr/tcp_posix_test.c
+++ b/test/core/iomgr/tcp_posix_test.c
@@ -31,6 +31,11 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+// This test won't work except with posix sockets enabled
+#ifdef GRPC_POSIX_SOCKET
+
 #include "src/core/lib/iomgr/tcp_posix.h"
 
 #include <errno.h>
@@ -544,3 +549,9 @@ int main(int argc, char **argv) {
 
   return 0;
 }
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.c
index 5791f562e1..f839911a84 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.c
@@ -31,6 +31,11 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+// This test won't work except with posix sockets enabled
+#ifdef GRPC_POSIX_SOCKET
+
 #include "src/core/lib/iomgr/tcp_server.h"
 
 #include <errno.h>
@@ -46,6 +51,7 @@
 #include <grpc/support/time.h>
 
 #include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
@@ -149,16 +155,18 @@ static void test_no_op_with_start(void) {
 
 static void test_no_op_with_port(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  struct sockaddr_in addr;
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   grpc_tcp_server *s;
   GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port");
 
-  memset(&addr, 0, sizeof(addr));
-  addr.sin_family = AF_INET;
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  resolved_addr.len = sizeof(struct sockaddr_in);
+  addr->sin_family = AF_INET;
   int port;
-  GPR_ASSERT(grpc_tcp_server_add_port(s, (struct sockaddr *)&addr, sizeof(addr),
-                                      &port) == GRPC_ERROR_NONE &&
+  GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr, &port) ==
+                 GRPC_ERROR_NONE &&
              port > 0);
 
   grpc_tcp_server_unref(&exec_ctx, s);
@@ -167,16 +175,18 @@ static void test_no_op_with_port(void) {
 
 static void test_no_op_with_port_and_start(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  struct sockaddr_in addr;
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   grpc_tcp_server *s;
   GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port_and_start");
   int port;
 
-  memset(&addr, 0, sizeof(addr));
-  addr.sin_family = AF_INET;
-  GPR_ASSERT(grpc_tcp_server_add_port(s, (struct sockaddr *)&addr, sizeof(addr),
-                                      &port) == GRPC_ERROR_NONE &&
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  resolved_addr.len = sizeof(struct sockaddr_in);
+  addr->sin_family = AF_INET;
+  GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr, &port) ==
+                 GRPC_ERROR_NONE &&
              port > 0);
 
   grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);
@@ -221,9 +231,11 @@ static void tcp_connect(grpc_exec_ctx *exec_ctx, const struct sockaddr *remote,
    the same port should be tested. */
 static void test_connect(unsigned n) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  struct sockaddr_storage addr;
-  struct sockaddr_storage addr1;
-  socklen_t addr_len = sizeof(addr);
+  grpc_resolved_address resolved_addr;
+  grpc_resolved_address resolved_addr1;
+  struct sockaddr_storage *addr = (struct sockaddr_storage *)resolved_addr.addr;
+  struct sockaddr_storage *addr1 =
+      (struct sockaddr_storage *)resolved_addr1.addr;
   unsigned svr_fd_count;
   int svr_port;
   unsigned svr1_fd_count;
@@ -235,19 +247,20 @@ static void test_connect(unsigned n) {
   server_weak_ref_init(&weak_ref);
   LOG_TEST("test_connect");
   gpr_log(GPR_INFO, "clients=%d", n);
-  memset(&addr, 0, sizeof(addr));
-  memset(&addr1, 0, sizeof(addr1));
-  addr.ss_family = addr1.ss_family = AF_INET;
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  memset(&resolved_addr1, 0, sizeof(resolved_addr1));
+  resolved_addr.len = sizeof(struct sockaddr_storage);
+  resolved_addr1.len = sizeof(struct sockaddr_storage);
+  addr->ss_family = addr1->ss_family = AF_INET;
   GPR_ASSERT(GRPC_ERROR_NONE ==
-             grpc_tcp_server_add_port(s, (struct sockaddr *)&addr, addr_len,
-                                      &svr_port));
+             grpc_tcp_server_add_port(s, &resolved_addr, &svr_port));
   GPR_ASSERT(svr_port > 0);
   /* Cannot use wildcard (port==0), because add_port() will try to reuse the
      same port as a previous add_port(). */
   svr1_port = grpc_pick_unused_port_or_die();
-  grpc_sockaddr_set_port((struct sockaddr *)&addr1, svr1_port);
-  GPR_ASSERT(grpc_tcp_server_add_port(s, (struct sockaddr *)&addr1, addr_len,
-                                      &svr_port) == GRPC_ERROR_NONE &&
+  grpc_sockaddr_set_port(&resolved_addr1, svr1_port);
+  GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr1, &svr_port) ==
+                 GRPC_ERROR_NONE &&
              svr_port == svr1_port);
 
   /* Bad port_index. */
@@ -268,16 +281,18 @@ static void test_connect(unsigned n) {
     int fd = grpc_tcp_server_port_fd(s, 0, i);
     GPR_ASSERT(fd >= 0);
     if (i == 0) {
-      GPR_ASSERT(getsockname(fd, (struct sockaddr *)&addr, &addr_len) == 0);
-      GPR_ASSERT(addr_len <= sizeof(addr));
+      GPR_ASSERT(getsockname(fd, (struct sockaddr *)addr,
+                             (socklen_t *)&resolved_addr.len) == 0);
+      GPR_ASSERT(resolved_addr.len <= sizeof(*addr));
     }
   }
   for (i = 0; i < svr1_fd_count; ++i) {
     int fd = grpc_tcp_server_port_fd(s, 1, i);
     GPR_ASSERT(fd >= 0);
     if (i == 0) {
-      GPR_ASSERT(getsockname(fd, (struct sockaddr *)&addr1, &addr_len) == 0);
-      GPR_ASSERT(addr_len <= sizeof(addr1));
+      GPR_ASSERT(getsockname(fd, (struct sockaddr *)addr1,
+                             (socklen_t *)&resolved_addr1.len) == 0);
+      GPR_ASSERT(resolved_addr1.len <= sizeof(*addr1));
     }
   }
 
@@ -287,7 +302,8 @@ static void test_connect(unsigned n) {
     on_connect_result result;
     int svr_fd;
     on_connect_result_init(&result);
-    tcp_connect(&exec_ctx, (struct sockaddr *)&addr, addr_len, &result);
+    tcp_connect(&exec_ctx, (struct sockaddr *)addr,
+                (socklen_t)resolved_addr.len, &result);
     GPR_ASSERT(result.server_fd >= 0);
     svr_fd = result.server_fd;
     GPR_ASSERT(grpc_tcp_server_port_fd(s, result.port_index, result.fd_index) ==
@@ -301,7 +317,8 @@ static void test_connect(unsigned n) {
     grpc_tcp_server_unref(&exec_ctx, result.server);
 
     on_connect_result_init(&result);
-    tcp_connect(&exec_ctx, (struct sockaddr *)&addr1, addr_len, &result);
+    tcp_connect(&exec_ctx, (struct sockaddr *)addr1,
+                (socklen_t)resolved_addr1.len, &result);
     GPR_ASSERT(result.server_fd >= 0);
     GPR_ASSERT(result.server_fd != svr_fd);
     GPR_ASSERT(grpc_tcp_server_port_fd(s, result.port_index, result.fd_index) ==
@@ -350,3 +367,9 @@ int main(int argc, char **argv) {
   gpr_free(g_pollset);
   return 0;
 }
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/test/core/iomgr/timer_heap_test.c b/test/core/iomgr/timer_heap_test.c
index d1cb0047f2..410d972313 100644
--- a/test/core/iomgr/timer_heap_test.c
+++ b/test/core/iomgr/timer_heap_test.c
@@ -31,6 +31,11 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+// This test only works with the generic timer implementation
+#ifdef GRPC_TIMER_USE_GENERIC
+
 #include "src/core/lib/iomgr/timer_heap.h"
 
 #include <stdlib.h>
@@ -315,3 +320,9 @@ int main(int argc, char **argv) {
 
   return 0;
 }
+
+#else /* GRPC_TIMER_USE_GENERIC */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_TIMER_USE_GENERIC */
diff --git a/test/core/iomgr/udp_server_test.c b/test/core/iomgr/udp_server_test.c
index 71d2fb5bd4..d9f9cd748b 100644
--- a/test/core/iomgr/udp_server_test.c
+++ b/test/core/iomgr/udp_server_test.c
@@ -31,6 +31,11 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+// This test won't work except with posix sockets enabled
+#ifdef GRPC_POSIX_SOCKET
+
 #include "src/core/lib/iomgr/udp_server.h"
 
 #include <netinet/in.h>
@@ -98,14 +103,16 @@ static void test_no_op_with_start(void) {
 static void test_no_op_with_port(void) {
   g_number_of_orphan_calls = 0;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  struct sockaddr_in addr;
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   grpc_udp_server *s = grpc_udp_server_create();
   LOG_TEST("test_no_op_with_port");
 
-  memset(&addr, 0, sizeof(addr));
-  addr.sin_family = AF_INET;
-  GPR_ASSERT(grpc_udp_server_add_port(s, (struct sockaddr *)&addr, sizeof(addr),
-                                      on_read, on_fd_orphaned));
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  resolved_addr.len = sizeof(struct sockaddr_in);
+  addr->sin_family = AF_INET;
+  GPR_ASSERT(
+      grpc_udp_server_add_port(s, &resolved_addr, on_read, on_fd_orphaned));
 
   grpc_udp_server_destroy(&exec_ctx, s, NULL);
   grpc_exec_ctx_finish(&exec_ctx);
@@ -117,14 +124,16 @@ static void test_no_op_with_port(void) {
 static void test_no_op_with_port_and_start(void) {
   g_number_of_orphan_calls = 0;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  struct sockaddr_in addr;
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   grpc_udp_server *s = grpc_udp_server_create();
   LOG_TEST("test_no_op_with_port_and_start");
 
-  memset(&addr, 0, sizeof(addr));
-  addr.sin_family = AF_INET;
-  GPR_ASSERT(grpc_udp_server_add_port(s, (struct sockaddr *)&addr, sizeof(addr),
-                                      on_read, on_fd_orphaned));
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  resolved_addr.len = sizeof(struct sockaddr_in);
+  addr->sin_family = AF_INET;
+  GPR_ASSERT(
+      grpc_udp_server_add_port(s, &resolved_addr, on_read, on_fd_orphaned));
 
   grpc_udp_server_start(&exec_ctx, s, NULL, 0, NULL);
 
@@ -138,8 +147,8 @@ static void test_no_op_with_port_and_start(void) {
 
 static void test_receive(int number_of_clients) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  struct sockaddr_storage addr;
-  socklen_t addr_len = sizeof(addr);
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_storage *addr = (struct sockaddr_storage *)resolved_addr.addr;
   int clifd, svrfd;
   grpc_udp_server *s = grpc_udp_server_create();
   int i;
@@ -152,15 +161,17 @@ static void test_receive(int number_of_clients) {
   g_number_of_bytes_read = 0;
   g_number_of_orphan_calls = 0;
 
-  memset(&addr, 0, sizeof(addr));
-  addr.ss_family = AF_INET;
-  GPR_ASSERT(grpc_udp_server_add_port(s, (struct sockaddr *)&addr, addr_len,
-                                      on_read, on_fd_orphaned));
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  resolved_addr.len = sizeof(struct sockaddr_storage);
+  addr->ss_family = AF_INET;
+  GPR_ASSERT(
+      grpc_udp_server_add_port(s, &resolved_addr, on_read, on_fd_orphaned));
 
   svrfd = grpc_udp_server_get_fd(s, 0);
   GPR_ASSERT(svrfd >= 0);
-  GPR_ASSERT(getsockname(svrfd, (struct sockaddr *)&addr, &addr_len) == 0);
-  GPR_ASSERT(addr_len <= sizeof(addr));
+  GPR_ASSERT(getsockname(svrfd, (struct sockaddr *)addr,
+                         (socklen_t *)&resolved_addr.len) == 0);
+  GPR_ASSERT(resolved_addr.len <= sizeof(struct sockaddr_storage));
 
   pollsets[0] = g_pollset;
   grpc_udp_server_start(&exec_ctx, s, pollsets, 1, NULL);
@@ -172,9 +183,10 @@ static void test_receive(int number_of_clients) {
 
     number_of_reads_before = g_number_of_reads;
     /* Create a socket, send a packet to the UDP server. */
-    clifd = socket(addr.ss_family, SOCK_DGRAM, 0);
+    clifd = socket(addr->ss_family, SOCK_DGRAM, 0);
     GPR_ASSERT(clifd >= 0);
-    GPR_ASSERT(connect(clifd, (struct sockaddr *)&addr, addr_len) == 0);
+    GPR_ASSERT(connect(clifd, (struct sockaddr *)&addr,
+                       (socklen_t)resolved_addr.len) == 0);
     GPR_ASSERT(5 == write(clifd, "hello", 5));
     while (g_number_of_reads == number_of_reads_before &&
            gpr_time_cmp(deadline, gpr_now(deadline.clock_type)) > 0) {
@@ -229,3 +241,9 @@ int main(int argc, char **argv) {
   grpc_iomgr_shutdown();
   return 0;
 }
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/test/core/iomgr/wakeup_fd_cv_test.c b/test/core/iomgr/wakeup_fd_cv_test.c
index 952985ed7e..82452d2157 100644
--- a/test/core/iomgr/wakeup_fd_cv_test.c
+++ b/test/core/iomgr/wakeup_fd_cv_test.c
@@ -31,6 +31,10 @@
  *
  */
 
+#include "src/core/lib/iomgr/port.h"
+
+#ifdef GRPC_POSIX_SOCKET
+
 #include <pthread.h>
 
 #include <grpc/support/log.h>
@@ -238,3 +242,9 @@ int main(int argc, char **argv) {
   grpc_iomgr_platform_shutdown();
   return 0;
 }
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char **argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */
diff --git a/test/core/security/credentials_test.c b/test/core/security/credentials_test.c
index 2f8ffe4da6..b74baa33f1 100644
--- a/test/core/security/credentials_test.c
+++ b/test/core/security/credentials_test.c
@@ -1125,28 +1125,19 @@ static void test_metadata_plugin_failure(void) {
 }
 
 static void test_get_well_known_google_credentials_file_path(void) {
-#ifdef GPR_POSIX_FILE
   char *path;
-  char *old_home = gpr_getenv("HOME");
-  gpr_setenv("HOME", "/tmp");
+  char *home = gpr_getenv("HOME");
   path = grpc_get_well_known_google_credentials_file_path();
   GPR_ASSERT(path != NULL);
-  GPR_ASSERT(0 == strcmp("/tmp/.config/" GRPC_GOOGLE_CLOUD_SDK_CONFIG_DIRECTORY
-                         "/" GRPC_GOOGLE_WELL_KNOWN_CREDENTIALS_FILE,
-                         path));
   gpr_free(path);
 #if defined(GPR_POSIX_ENV) || defined(GPR_LINUX_ENV)
   unsetenv("HOME");
   path = grpc_get_well_known_google_credentials_file_path();
   GPR_ASSERT(path == NULL);
-#endif /* GPR_POSIX_ENV || GPR_LINUX_ENV */
-  gpr_setenv("HOME", old_home);
-  gpr_free(old_home);
-#else /* GPR_POSIX_FILE */
-  char *path = grpc_get_well_known_google_credentials_file_path();
-  GPR_ASSERT(path != NULL);
+  gpr_setenv("HOME", home);
   gpr_free(path);
-#endif
+#endif /* GPR_POSIX_ENV || GPR_LINUX_ENV */
+  gpr_free(home);
 }
 
 static void test_channel_creds_duplicate_without_call_creds(void) {
diff --git a/test/core/surface/concurrent_connectivity_test.c b/test/core/surface/concurrent_connectivity_test.c
index f7567f350d..f9f723baaa 100644
--- a/test/core/surface/concurrent_connectivity_test.c
+++ b/test/core/surface/concurrent_connectivity_test.c
@@ -31,6 +31,12 @@
  *
  */
 
+/* With the addition of a libuv endpoint, sockaddr.h now includes uv.h when
+   using that endpoint. Because of various transitive includes in uv.h,
+   including windows.h on Windows, uv.h must be included before other system
+   headers. Therefore, sockaddr.h must always be included first */
+#include "src/core/lib/iomgr/sockaddr.h"
+
 #include <memory.h>
 #include <stdio.h>
 
@@ -42,6 +48,7 @@
 
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/iomgr/tcp_server.h"
 
@@ -109,16 +116,15 @@ void bad_server_thread(void *vargs) {
   struct server_thread_args *args = (struct server_thread_args *)vargs;
 
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  struct sockaddr_storage addr;
-  socklen_t addr_len = sizeof(addr);
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_storage *addr = (struct sockaddr_storage *)resolved_addr.addr;
   int port;
   grpc_tcp_server *s;
   grpc_error *error = grpc_tcp_server_create(NULL, NULL, &s);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  memset(&addr, 0, sizeof(addr));
-  addr.ss_family = AF_INET;
-  error =
-      grpc_tcp_server_add_port(s, (struct sockaddr *)&addr, addr_len, &port);
+  memset(&resolved_addr, 0, sizeof(resolved_addr));
+  addr->ss_family = AF_INET;
+  error = grpc_tcp_server_add_port(s, &resolved_addr, &port);
   GPR_ASSERT(GRPC_LOG_IF_ERROR("grpc_tcp_server_add_port", error));
   GPR_ASSERT(port > 0);
   gpr_asprintf(&args->addr, "localhost:%d", port);
diff --git a/test/core/transport/chttp2/alpn_test.c b/test/core/transport/chttp2/alpn_test.c
index 48064ec9b3..cde891cd5d 100644
--- a/test/core/transport/chttp2/alpn_test.c
+++ b/test/core/transport/chttp2/alpn_test.c
@@ -38,6 +38,7 @@
 
 static void test_alpn_success(void) {
   GPR_ASSERT(grpc_chttp2_is_alpn_version_supported("h2", 2));
+  GPR_ASSERT(grpc_chttp2_is_alpn_version_supported("grpc-exp", 8));
 }
 
 static void test_alpn_failure(void) {
@@ -45,9 +46,27 @@ static void test_alpn_failure(void) {
   GPR_ASSERT(!grpc_chttp2_is_alpn_version_supported("h1-15", 5));
 }
 
+// First index in ALPN supported version list of a given protocol. Returns a
+// value one beyond the last valid element index if not found.
+static size_t alpn_version_index(const char *version, size_t size) {
+  size_t i;
+  for (i = 0; i < grpc_chttp2_num_alpn_versions(); ++i) {
+    if (!strncmp(version, grpc_chttp2_get_alpn_version_index(i), size)) {
+      return i;
+    }
+  }
+  return i;
+}
+
+static void test_alpn_grpc_before_h2(void) {
+  // grpc-exp is preferred over h2.
+  GPR_ASSERT(alpn_version_index("grpc-exp", 8) < alpn_version_index("h2", 2));
+}
+
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   test_alpn_success();
   test_alpn_failure();
+  test_alpn_grpc_before_h2();
   return 0;
 }
diff --git a/test/core/util/port_posix.c b/test/core/util/port_posix.c
index 265e0acee1..60537b4946 100644
--- a/test/core/util/port_posix.c
+++ b/test/core/util/port_posix.c
@@ -31,9 +31,9 @@
  *
  */
 
-#include <grpc/support/port_platform.h>
+#include "src/core/lib/iomgr/port.h"
 #include "test/core/util/test_config.h"
-#if defined(GPR_POSIX_SOCKET) && defined(GRPC_TEST_PICK_PORT)
+#if defined(GRPC_POSIX_SOCKET) && defined(GRPC_TEST_PICK_PORT)
 
 #include "test/core/util/port.h"
 
@@ -237,4 +237,4 @@ int grpc_pick_unused_port_or_die(void) {
 
 void grpc_recycle_unused_port(int port) { GPR_ASSERT(free_chosen_port(port)); }
 
-#endif /* GPR_POSIX_SOCKET && GRPC_TEST_PICK_PORT */
+#endif /* GRPC_POSIX_SOCKET && GRPC_TEST_PICK_PORT */
diff --git a/test/core/util/port_uv.c b/test/core/util/port_uv.c
new file mode 100644
index 0000000000..0c9c0d87d6
--- /dev/null
+++ b/test/core/util/port_uv.c
@@ -0,0 +1,117 @@
+/*
+ *
+ * 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 "src/core/lib/iomgr/port.h"
+#include "test/core/util/test_config.h"
+#if defined(GRPC_UV) && defined(GRPC_TEST_PICK_PORT)
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/support/env.h"
+#include "test/core/util/port.h"
+#include "test/core/util/port_server_client.h"
+
+// Almost everything in this file has been copied from port_posix.c
+
+static int *chosen_ports = NULL;
+static size_t num_chosen_ports = 0;
+
+static int free_chosen_port(int port) {
+  size_t i;
+  int found = 0;
+  size_t found_at = 0;
+  char *env = gpr_getenv("GRPC_TEST_PORT_SERVER");
+  /* Find the port and erase it from the list, then tell the server it can be
+     freed. */
+  for (i = 0; i < num_chosen_ports; i++) {
+    if (chosen_ports[i] == port) {
+      GPR_ASSERT(found == 0);
+      found = 1;
+      found_at = i;
+    }
+  }
+  if (found) {
+    chosen_ports[found_at] = chosen_ports[num_chosen_ports - 1];
+    num_chosen_ports--;
+    if (env) {
+      grpc_free_port_using_server(env, port);
+    }
+  }
+  gpr_free(env);
+  return found;
+}
+
+static void free_chosen_ports(void) {
+  char *env = gpr_getenv("GRPC_TEST_PORT_SERVER");
+  if (env != NULL) {
+    size_t i;
+    for (i = 0; i < num_chosen_ports; i++) {
+      grpc_free_port_using_server(env, chosen_ports[i]);
+    }
+    gpr_free(env);
+  }
+
+  gpr_free(chosen_ports);
+}
+
+static void chose_port(int port) {
+  if (chosen_ports == NULL) {
+    atexit(free_chosen_ports);
+  }
+  num_chosen_ports++;
+  chosen_ports = gpr_realloc(chosen_ports, sizeof(int) * num_chosen_ports);
+  chosen_ports[num_chosen_ports - 1] = port;
+}
+
+int grpc_pick_unused_port(void) {
+  // Currently only works with the port server
+  char *env = gpr_getenv("GRPC_TEST_PORT_SERVER");
+  GPR_ASSERT(env);
+  int port = grpc_pick_port_using_server(env);
+  gpr_free(env);
+  if (port != 0) {
+    chose_port(port);
+  }
+  return port;
+}
+
+int grpc_pick_unused_port_or_die(void) {
+  int port = grpc_pick_unused_port();
+  GPR_ASSERT(port > 0);
+  return port;
+}
+
+void grpc_recycle_unused_port(int port) { GPR_ASSERT(free_chosen_port(port)); }
+
+#endif /* GRPC_UV && GRPC_TEST_PICK_PORT */
diff --git a/test/core/util/port_windows.c b/test/core/util/port_windows.c
index 9023719675..0c50a46644 100644
--- a/test/core/util/port_windows.c
+++ b/test/core/util/port_windows.c
@@ -31,9 +31,11 @@
  *
  */
 
-#include <grpc/support/port_platform.h>
+#include "src/core/lib/iomgr/port.h"
 #include "test/core/util/test_config.h"
-#if defined(GPR_WINSOCK_SOCKET) && defined(GRPC_TEST_PICK_PORT)
+#if defined(GRPC_WINSOCK_SOCKET) && defined(GRPC_TEST_PICK_PORT)
+
+#include "src/core/lib/iomgr/sockaddr.h"
 
 #include "test/core/util/port.h"
 
@@ -242,4 +244,4 @@ int grpc_pick_unused_port_or_die(void) {
 
 void grpc_recycle_unused_port(int port) { GPR_ASSERT(free_chosen_port(port)); }
 
-#endif /* GPR_WINSOCK_SOCKET && GRPC_TEST_PICK_PORT */
+#endif /* GRPC_WINSOCK_SOCKET && GRPC_TEST_PICK_PORT */
diff --git a/test/core/util/test_tcp_server.c b/test/core/util/test_tcp_server.c
index 8a0b3932d8..9ac97413d4 100644
--- a/test/core/util/test_tcp_server.c
+++ b/test/core/util/test_tcp_server.c
@@ -31,6 +31,8 @@
  *
  */
 
+#include "src/core/lib/iomgr/sockaddr.h"
+
 #include "test/core/util/test_tcp_server.h"
 
 #include <grpc/grpc.h>
@@ -41,7 +43,7 @@
 #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/resolve_address.h"
 #include "src/core/lib/iomgr/tcp_server.h"
 #include "test/core/util/port.h"
 
@@ -64,19 +66,20 @@ void test_tcp_server_init(test_tcp_server *server,
 }
 
 void test_tcp_server_start(test_tcp_server *server, int port) {
-  struct sockaddr_in addr;
+  grpc_resolved_address resolved_addr;
+  struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   int port_added;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
-  addr.sin_family = AF_INET;
-  addr.sin_port = htons((uint16_t)port);
-  memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
+  addr->sin_family = AF_INET;
+  addr->sin_port = htons((uint16_t)port);
+  memset(&addr->sin_addr, 0, sizeof(addr->sin_addr));
 
   grpc_error *error = grpc_tcp_server_create(&server->shutdown_complete, NULL,
                                              &server->tcp_server);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  error = grpc_tcp_server_add_port(server->tcp_server, &addr, sizeof(addr),
-                                   &port_added);
+  error =
+      grpc_tcp_server_add_port(server->tcp_server, &resolved_addr, &port_added);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(port_added == port);
 
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index a9b7c8f8d3..823f0bd035 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -47,6 +47,7 @@
 #include <grpc/support/tls.h>
 #include <gtest/gtest.h>
 
+#include "src/core/lib/iomgr/port.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
@@ -54,7 +55,7 @@
 #include "test/cpp/util/string_ref_helper.h"
 #include "test/cpp/util/test_credentials_provider.h"
 
-#ifdef GPR_POSIX_SOCKET
+#ifdef GRPC_POSIX_SOCKET
 #include "src/core/lib/iomgr/ev_posix.h"
 #endif
 
@@ -73,7 +74,7 @@ namespace {
 void* tag(int i) { return (void*)(intptr_t)i; }
 int detag(void* p) { return static_cast<int>(reinterpret_cast<intptr_t>(p)); }
 
-#ifdef GPR_POSIX_SOCKET
+#ifdef GRPC_POSIX_SOCKET
 static int maybe_assert_non_blocking_poll(struct pollfd* pfds, nfds_t nfds,
                                           int timeout) {
   if (gpr_tls_get(&g_is_async_end2end_test)) {
diff --git a/test/cpp/interop/stress_test.cc b/test/cpp/interop/stress_test.cc
index 5647cb5531..46d09b7f28 100644
--- a/test/cpp/interop/stress_test.cc
+++ b/test/cpp/interop/stress_test.cc
@@ -46,6 +46,7 @@
 
 #include "src/proto/grpc/testing/metrics.grpc.pb.h"
 #include "src/proto/grpc/testing/metrics.pb.h"
+#include "test/cpp/interop/client_helper.h"
 #include "test/cpp/interop/interop_client.h"
 #include "test/cpp/interop/stress_interop_client.h"
 #include "test/cpp/util/metrics_server.h"
@@ -68,7 +69,8 @@ DEFINE_int32(test_duration_secs, -1,
 
 DEFINE_string(server_addresses, "localhost:8080",
               "The list of server"
-              " addresses in the format:\n"
+              "addresses. This option is ignored if either\n"
+              "server_port or server_host is specified. The format is: \n"
               " \"<name_1>:<port_1>,<name_2>:<port_1>...<name_N>:<port_N>\"\n"
               " Note: <name> can be servername or IP address.");
 
@@ -79,6 +81,34 @@ DEFINE_int32(num_stubs_per_channel, 1,
              "indicates the max number of parallel RPC calls on each channel "
              "at any given time.");
 
+DEFINE_string(test_case, "",
+              "Configure different test cases. Valid options are:\n\n"
+              "all : all test cases;\n"
+              "cancel_after_begin : cancel stream after starting it;\n"
+              "cancel_after_first_response: cancel on first response;\n"
+              "client_compressed_streaming : compressed request streaming with "
+              "client_compressed_unary : single compressed request;\n"
+              "client_streaming : request streaming with single response;\n"
+              "compute_engine_creds: large_unary with compute engine auth;\n"
+              "custom_metadata: server will echo custom metadata;\n"
+              "empty_stream : bi-di stream with no request/response;\n"
+              "empty_unary : empty (zero bytes) request and response;\n"
+              "half_duplex : half-duplex streaming;\n"
+              "jwt_token_creds: large_unary with JWT token auth;\n"
+              "large_unary : single request and (large) response;\n"
+              "oauth2_auth_token: raw oauth2 access token auth;\n"
+              "per_rpc_creds: raw oauth2 access token on a single rpc;\n"
+              "ping_pong : full-duplex streaming;\n"
+              "response streaming;\n"
+              "server_compressed_streaming : single request with compressed "
+              "server_compressed_unary : single compressed response;\n"
+              "server_streaming : single request with response streaming;\n"
+              "slow_consumer : single request with response streaming with "
+              "slow client consumer;\n"
+              "status_code_and_message: verify status code & message;\n"
+              "timeout_on_sleeping_server: deadline exceeds on stream;\n"
+              "unimplemented_method: client calls an unimplemented_method;\n");
+
 // TODO(sreek): Add more test cases here in future
 DEFINE_string(test_cases, "",
               "List of test cases to call along with the"
@@ -115,6 +145,17 @@ DEFINE_bool(do_not_abort_on_transient_failures, true,
             "If set to 'true', abort() is not called in case of transient "
             "failures like temporary connection failures.");
 
+// Options from client.cc (for compatibility with interop test).
+// TODO(sreek): Consolidate overlapping options
+DEFINE_bool(use_tls, false, "Whether to use tls.");
+DEFINE_bool(use_test_ca, false, "False to use SSL roots for google");
+DEFINE_int32(server_port, 0, "Server port.");
+DEFINE_string(server_host, "127.0.0.1", "Server host to connect to");
+DEFINE_string(server_host_override, "foo.test.google.fr",
+              "Override the server host which is sent in HTTP header");
+DEFINE_string(service_account_key_file, "",
+              "Path to service account json key file.");
+
 using grpc::testing::kTestCaseList;
 using grpc::testing::MetricsService;
 using grpc::testing::MetricsServiceImpl;
@@ -200,6 +241,8 @@ bool ParseTestCasesString(const grpc::string& test_cases,
 void LogParameterInfo(const std::vector<grpc::string>& addresses,
                       const std::vector<std::pair<TestCaseType, int>>& tests) {
   gpr_log(GPR_INFO, "server_addresses: %s", FLAGS_server_addresses.c_str());
+  gpr_log(GPR_INFO, "server_host: %s", FLAGS_server_host.c_str());
+  gpr_log(GPR_INFO, "server_port: %d", FLAGS_server_port);
   gpr_log(GPR_INFO, "test_cases : %s", FLAGS_test_cases.c_str());
   gpr_log(GPR_INFO, "sleep_duration_ms: %d", FLAGS_sleep_duration_ms);
   gpr_log(GPR_INFO, "test_duration_secs: %d", FLAGS_test_duration_secs);
@@ -243,11 +286,24 @@ int main(int argc, char** argv) {
 
   // Parse the server addresses
   std::vector<grpc::string> server_addresses;
-  ParseCommaDelimitedString(FLAGS_server_addresses, server_addresses);
+  if (FLAGS_server_port != 0) {
+    // We are using interop_client style cmdline options.
+    const int host_port_buf_size = 1024;
+    char host_port[host_port_buf_size];
+    snprintf(host_port, host_port_buf_size, "%s:%d", FLAGS_server_host.c_str(),
+             FLAGS_server_port);
+    std::string host_port_str(host_port);
+    ParseCommaDelimitedString(host_port_str, server_addresses);
+  } else {
+    ParseCommaDelimitedString(FLAGS_server_addresses, server_addresses);
+  }
 
   // Parse test cases and weights
   if (FLAGS_test_cases.length() == 0) {
-    gpr_log(GPR_ERROR, "Not running tests. The 'test_cases' string is empty");
+    // We are using interop_client style test_case option
+    FLAGS_test_cases = FLAGS_test_case + ":100";
+  } else if (FLAGS_test_case != "") {
+    gpr_log(GPR_ERROR, "specify --test_case or --test_cases but not both.");
     return 1;
   }
 
@@ -283,9 +339,14 @@ int main(int argc, char** argv) {
     // Create channel(s) for each server
     for (int channel_idx = 0; channel_idx < FLAGS_num_channels_per_server;
          channel_idx++) {
-      // TODO (sreek). This won't work for tests that require Authentication
-      std::shared_ptr<grpc::Channel> channel(
-          grpc::CreateChannel(*it, grpc::InsecureChannelCredentials()));
+      gpr_log(GPR_INFO, "Starting test with %s channel_idx=%d..", it->c_str(),
+              channel_idx);
+      std::shared_ptr<grpc::Channel> channel;
+      if (FLAGS_use_tls) {
+        channel = grpc::testing::CreateChannelForTestCase(FLAGS_test_case);
+      } else {
+        channel = grpc::CreateChannel(*it, grpc::InsecureChannelCredentials());
+      }
 
       // Create stub(s) for each channel
       for (int stub_idx = 0; stub_idx < FLAGS_num_stubs_per_channel;
@@ -311,8 +372,10 @@ int main(int argc, char** argv) {
   }
 
   // Start metrics server before waiting for the stress test threads
-  std::unique_ptr<grpc::Server> metrics_server =
-      metrics_service.StartServer(FLAGS_metrics_port);
+  if (FLAGS_metrics_port > 0) {
+    std::unique_ptr<grpc::Server> metrics_server =
+        metrics_service.StartServer(FLAGS_metrics_port);
+  }
 
   // Wait for the stress test threads to complete
   for (auto it = test_threads.begin(); it != test_threads.end(); it++) {