Adding upstream version 1:9.16.44.upstream/1%9.16.44upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2218 insertions, 0 deletions

diff --git a/lib/isc/tests/netmgr_test.c b/lib/isc/tests/netmgr_test.c
new file mode 100644
index 0000000..8e30359
--- /dev/null
+++ b/lib/isc/tests/netmgr_test.c
@@ -0,0 +1,2218 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#if HAVE_CMOCKA
+#include <sched.h> /* IWYU pragma: keep */
+#include <setjmp.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <uv.h>
+
+#define UNIT_TESTING
+#include <cmocka.h>
+
+#include <isc/nonce.h>
+#include <isc/os.h>
+#include <isc/quota.h>
+#include <isc/refcount.h>
+#include <isc/sockaddr.h>
+#include <isc/thread.h>
+#include <isc/util.h>
+
+#include "uv_wrap.h"
+#define KEEP_BEFORE
+
+#include "../netmgr/netmgr-int.h"
+#include "../netmgr/udp.c"
+#include "../netmgr/uv-compat.c"
+#include "../netmgr/uv-compat.h"
+#include "../netmgr_p.h"
+#include "isctest.h"
+
+typedef void (*stream_connect_function)(isc_nm_t *nm);
+
+static void
+connect_connect_cb(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg);
+static void
+connect_read_cb(isc_nmhandle_t *handle, isc_result_t eresult,
+		isc_region_t *region, void *cbarg);
+
+isc_nm_t *listen_nm = NULL;
+isc_nm_t *connect_nm = NULL;
+
+static isc_sockaddr_t udp_listen_addr;
+static isc_sockaddr_t udp_connect_addr;
+
+static isc_sockaddr_t tcp_listen_addr;
+static isc_sockaddr_t tcp_connect_addr;
+
+static uint64_t send_magic = 0;
+static uint64_t stop_magic = 0;
+
+static isc_region_t send_msg = { .base = (unsigned char *)&send_magic,
+				 .length = sizeof(send_magic) };
+
+static isc_region_t stop_msg = { .base = (unsigned char *)&stop_magic,
+				 .length = sizeof(stop_magic) };
+
+static atomic_bool do_send = false;
+static unsigned int workers = 0;
+
+static atomic_int_fast64_t nsends;
+static int_fast64_t esends; /* expected sends */
+
+static atomic_int_fast64_t ssends = 0;
+static atomic_int_fast64_t sreads = 0;
+static atomic_int_fast64_t saccepts = 0;
+
+static atomic_int_fast64_t cconnects = 0;
+static atomic_int_fast64_t csends = 0;
+static atomic_int_fast64_t creads = 0;
+static atomic_int_fast64_t ctimeouts = 0;
+
+static isc_refcount_t active_cconnects;
+static isc_refcount_t active_csends;
+static isc_refcount_t active_creads;
+static isc_refcount_t active_ssends;
+static isc_refcount_t active_sreads;
+
+static isc_quota_t listener_quota;
+static atomic_bool check_listener_quota;
+
+static bool skip_long_tests = false;
+
+static bool allow_send_back = false;
+static bool noanswer = false;
+
+static isc_nm_recv_cb_t connect_readcb = NULL;
+
+#define SKIP_IN_CI             \
+	if (skip_long_tests) { \
+		skip();        \
+		return;        \
+	}
+
+#define NSENDS 100
+
+/* Timeout for soft-timeout tests (0.05 seconds) */
+#define T_SOFT 50
+
+/* Timeouts in miliseconds */
+#define T_INIT	     120 * 1000
+#define T_IDLE	     120 * 1000
+#define T_KEEPALIVE  120 * 1000
+#define T_ADVERTISED 120 * 1000
+#define T_CONNECT    30 * 1000
+
+/* Wait for 1 second (1000 * 1000 microseconds) */
+#define WAIT_REPEATS 1000
+#define T_WAIT	     1000 /* In microseconds */
+
+#define WAIT_FOR(v, op, val)                                \
+	{                                                   \
+		X(v);                                       \
+		int_fast64_t __r = WAIT_REPEATS;            \
+		int_fast64_t __o = 0;                       \
+		do {                                        \
+			int_fast64_t __l = atomic_load(&v); \
+			if (__l op val) {                   \
+				break;                      \
+			};                                  \
+			if (__o == __l) {                   \
+				__r--;                      \
+			} else {                            \
+				__r = WAIT_REPEATS;         \
+			}                                   \
+			__o = __l;                          \
+			isc_test_nap(T_WAIT);               \
+		} while (__r > 0);                          \
+		X(v);                                       \
+		P(__r);                                     \
+		assert_true(atomic_load(&v) op val);        \
+	}
+
+#define WAIT_FOR_EQ(v, val) WAIT_FOR(v, ==, val)
+#define WAIT_FOR_NE(v, val) WAIT_FOR(v, !=, val)
+#define WAIT_FOR_LE(v, val) WAIT_FOR(v, <=, val)
+#define WAIT_FOR_LT(v, val) WAIT_FOR(v, <, val)
+#define WAIT_FOR_GE(v, val) WAIT_FOR(v, >=, val)
+#define WAIT_FOR_GT(v, val) WAIT_FOR(v, >, val)
+
+#define DONE() atomic_store(&do_send, false);
+
+#define CHECK_RANGE_FULL(v)                \
+	{                                  \
+		int __v = atomic_load(&v); \
+		assert_true(__v > 1);      \
+	}
+
+#define CHECK_RANGE_HALF(v)                \
+	{                                  \
+		int __v = atomic_load(&v); \
+		assert_true(__v > 1);      \
+	}
+
+/* Enable this to print values while running tests */
+#undef PRINT_DEBUG
+#ifdef PRINT_DEBUG
+#define X(v)                                                               \
+	fprintf(stderr, "%s:%s:%d:%s = %" PRId64 "\n", __func__, __FILE__, \
+		__LINE__, #v, atomic_load(&v))
+#define P(v) fprintf(stderr, #v " = %" PRId64 "\n", v)
+#define F()                                                   \
+	fprintf(stderr, "%s(%p, %s, %p)\n", __func__, handle, \
+		isc_result_totext(eresult), cbarg)
+#else
+#define X(v)
+#define P(v)
+#define F()
+#endif
+
+#define atomic_assert_int_eq(val, exp) assert_int_equal(atomic_load(&val), exp)
+#define atomic_assert_int_ne(val, exp) \
+	assert_int_not_equal(atomic_load(&val), exp)
+#define atomic_assert_int_le(val, exp) assert_true(atomic_load(&val) <= exp)
+#define atomic_assert_int_lt(val, exp) assert_true(atomic_load(&val) > exp)
+#define atomic_assert_int_ge(val, exp) assert_true(atomic_load(&val) >= exp)
+#define atomic_assert_int_gt(val, exp) assert_true(atomic_load(&val) > exp)
+
+static int
+_setup(void **state __attribute__((unused))) {
+	char *p = NULL;
+
+	if (workers == 0) {
+		workers = isc_os_ncpus();
+	}
+	p = getenv("ISC_TASK_WORKERS");
+	if (p != NULL) {
+		workers = atoi(p);
+	}
+	INSIST(workers != 0);
+
+	if (isc_test_begin(NULL, false, workers) != ISC_R_SUCCESS) {
+		return (-1);
+	}
+
+	signal(SIGPIPE, SIG_IGN);
+
+	if (getenv("CI") == NULL || getenv("CI_ENABLE_ALL_TESTS") != NULL) {
+		esends = NSENDS * workers;
+	} else {
+		esends = workers;
+		skip_long_tests = true;
+	}
+
+	return (0);
+}
+
+static int
+_teardown(void **state __attribute__((unused))) {
+	isc_test_end();
+
+	return (0);
+}
+
+static int
+setup_ephemeral_port(isc_sockaddr_t *addr, sa_family_t family) {
+	socklen_t addrlen = sizeof(*addr);
+	uv_os_sock_t fd;
+	int r;
+
+	isc_sockaddr_fromin6(addr, &in6addr_loopback, 0);
+
+	fd = socket(AF_INET6, family, 0);
+	if (fd < 0) {
+		perror("setup_ephemeral_port: socket()");
+		return (-1);
+	}
+
+	r = bind(fd, (const struct sockaddr *)&addr->type.sa,
+		 sizeof(addr->type.sin6));
+	if (r != 0) {
+		perror("setup_ephemeral_port: bind()");
+		isc__nm_closesocket(fd);
+		return (r);
+	}
+
+	r = getsockname(fd, (struct sockaddr *)&addr->type.sa, &addrlen);
+	if (r != 0) {
+		perror("setup_ephemeral_port: getsockname()");
+		isc__nm_closesocket(fd);
+		return (r);
+	}
+
+#if IPV6_RECVERR
+#define setsockopt_on(socket, level, name) \
+	setsockopt(socket, level, name, &(int){ 1 }, sizeof(int))
+
+	r = setsockopt_on(fd, IPPROTO_IPV6, IPV6_RECVERR);
+	if (r != 0) {
+		perror("setup_ephemeral_port");
+		isc__nm_closesocket(fd);
+		return (r);
+	}
+#endif
+
+	return (fd);
+}
+
+static int
+nm_setup(void **state __attribute__((unused))) {
+	uv_os_sock_t tcp_listen_sock = -1;
+	uv_os_sock_t udp_listen_sock = -1;
+
+	udp_connect_addr = (isc_sockaddr_t){ .length = 0 };
+	isc_sockaddr_fromin6(&udp_connect_addr, &in6addr_loopback, 0);
+
+	udp_listen_addr = (isc_sockaddr_t){ .length = 0 };
+	udp_listen_sock = setup_ephemeral_port(&udp_listen_addr, SOCK_DGRAM);
+	if (udp_listen_sock < 0) {
+		return (-1);
+	}
+	isc__nm_closesocket(udp_listen_sock);
+
+	tcp_connect_addr = (isc_sockaddr_t){ .length = 0 };
+	isc_sockaddr_fromin6(&tcp_connect_addr, &in6addr_loopback, 0);
+
+	tcp_listen_addr = (isc_sockaddr_t){ .length = 0 };
+	tcp_listen_sock = setup_ephemeral_port(&tcp_listen_addr, SOCK_STREAM);
+	if (tcp_listen_sock < 0) {
+		return (-1);
+	}
+	isc__nm_closesocket(tcp_listen_sock);
+
+	atomic_store(&do_send, true);
+	atomic_store(&nsends, esends);
+
+	atomic_store(&saccepts, 0);
+	atomic_store(&sreads, 0);
+	atomic_store(&ssends, 0);
+
+	atomic_store(&cconnects, 0);
+	atomic_store(&csends, 0);
+	atomic_store(&creads, 0);
+	atomic_store(&ctimeouts, 0);
+	allow_send_back = false;
+
+	isc_refcount_init(&active_cconnects, 0);
+	isc_refcount_init(&active_csends, 0);
+	isc_refcount_init(&active_creads, 0);
+	isc_refcount_init(&active_ssends, 0);
+	isc_refcount_init(&active_sreads, 0);
+
+	isc_nonce_buf(&send_magic, sizeof(send_magic));
+	isc_nonce_buf(&stop_magic, sizeof(stop_magic));
+	if (send_magic == stop_magic) {
+		return (-1);
+	}
+
+	isc__netmgr_create(test_mctx, workers, &listen_nm);
+	assert_non_null(listen_nm);
+	isc_nm_settimeouts(listen_nm, T_INIT, T_IDLE, T_KEEPALIVE,
+			   T_ADVERTISED);
+
+	isc__netmgr_create(test_mctx, workers, &connect_nm);
+	assert_non_null(connect_nm);
+	isc_nm_settimeouts(connect_nm, T_INIT, T_IDLE, T_KEEPALIVE,
+			   T_ADVERTISED);
+
+	isc_quota_init(&listener_quota, 0);
+	atomic_store(&check_listener_quota, false);
+
+	connect_readcb = connect_read_cb;
+	noanswer = false;
+
+	return (0);
+}
+
+static int
+nm_teardown(void **state __attribute__((unused))) {
+	UNUSED(state);
+
+	isc__netmgr_destroy(&connect_nm);
+	assert_null(connect_nm);
+
+	isc__netmgr_destroy(&listen_nm);
+	assert_null(listen_nm);
+
+	WAIT_FOR_EQ(active_cconnects, 0);
+	WAIT_FOR_EQ(active_csends, 0);
+	WAIT_FOR_EQ(active_csends, 0);
+	WAIT_FOR_EQ(active_ssends, 0);
+	WAIT_FOR_EQ(active_sreads, 0);
+
+	isc_refcount_destroy(&active_cconnects);
+	isc_refcount_destroy(&active_csends);
+	isc_refcount_destroy(&active_creads);
+	isc_refcount_destroy(&active_ssends);
+	isc_refcount_destroy(&active_sreads);
+
+	return (0);
+}
+
+/* Callbacks */
+
+static void
+noop_recv_cb(isc_nmhandle_t *handle, isc_result_t eresult, isc_region_t *region,
+	     void *cbarg) {
+	UNUSED(handle);
+	UNUSED(eresult);
+	UNUSED(region);
+	UNUSED(cbarg);
+}
+
+static unsigned int
+noop_accept_cb(isc_nmhandle_t *handle, unsigned int result, void *cbarg) {
+	UNUSED(handle);
+	UNUSED(result);
+	UNUSED(cbarg);
+
+	return (0);
+}
+
+static void
+connect_send_cb(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg);
+
+static void
+connect_send(isc_nmhandle_t *handle);
+
+static void
+connect_send_cb(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg) {
+	isc_nmhandle_t *sendhandle = handle;
+
+	assert_non_null(sendhandle);
+
+	UNUSED(cbarg);
+
+	F();
+
+	if (eresult != ISC_R_SUCCESS) {
+		/* Send failed, we need to stop reading too */
+		isc_nm_cancelread(handle);
+		goto unref;
+	}
+
+	atomic_fetch_add(&csends, 1);
+unref:
+	isc_refcount_decrement(&active_csends);
+	isc_nmhandle_detach(&sendhandle);
+}
+
+static void
+connect_send(isc_nmhandle_t *handle) {
+	isc_nmhandle_t *sendhandle = NULL;
+	isc_refcount_increment0(&active_csends);
+	isc_nmhandle_attach(handle, &sendhandle);
+	isc_nmhandle_setwritetimeout(handle, T_IDLE);
+	if (atomic_fetch_sub(&nsends, 1) > 1) {
+		isc_nm_send(sendhandle, &send_msg, connect_send_cb, NULL);
+	} else {
+		isc_nm_send(sendhandle, &stop_msg, connect_send_cb, NULL);
+	}
+}
+
+static void
+connect_read_cb(isc_nmhandle_t *handle, isc_result_t eresult,
+		isc_region_t *region, void *cbarg) {
+	uint64_t magic = 0;
+
+	UNUSED(cbarg);
+
+	assert_non_null(handle);
+
+	F();
+
+	if (eresult != ISC_R_SUCCESS) {
+		goto unref;
+	}
+
+	assert_true(region->length >= sizeof(magic));
+
+	atomic_fetch_add(&creads, 1);
+
+	memmove(&magic, region->base, sizeof(magic));
+
+	assert_true(magic == stop_magic || magic == send_magic);
+
+	if (magic == send_magic && allow_send_back) {
+		connect_send(handle);
+		return;
+	}
+
+unref:
+	isc_refcount_decrement(&active_creads);
+	isc_nmhandle_detach(&handle);
+}
+
+static void
+connect_connect_cb(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg) {
+	isc_nmhandle_t *readhandle = NULL;
+
+	UNUSED(cbarg);
+
+	F();
+
+	isc_refcount_decrement(&active_cconnects);
+
+	if (eresult != ISC_R_SUCCESS || connect_readcb == NULL) {
+		return;
+	}
+
+	atomic_fetch_add(&cconnects, 1);
+
+	isc_refcount_increment0(&active_creads);
+	isc_nmhandle_attach(handle, &readhandle);
+	isc_nm_read(handle, connect_readcb, NULL);
+
+	connect_send(handle);
+}
+
+static void
+listen_send_cb(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg) {
+	isc_nmhandle_t *sendhandle = handle;
+
+	UNUSED(cbarg);
+	UNUSED(eresult);
+
+	assert_non_null(sendhandle);
+
+	F();
+
+	if (eresult != ISC_R_SUCCESS) {
+		goto unref;
+	}
+
+	atomic_fetch_add(&ssends, 1);
+unref:
+	isc_nmhandle_detach(&sendhandle);
+	isc_refcount_decrement(&active_ssends);
+}
+
+static void
+listen_read_cb(isc_nmhandle_t *handle, isc_result_t eresult,
+	       isc_region_t *region, void *cbarg) {
+	uint64_t magic = 0;
+
+	assert_non_null(handle);
+
+	F();
+
+	if (eresult != ISC_R_SUCCESS) {
+		goto unref;
+	}
+
+	atomic_fetch_add(&sreads, 1);
+
+	assert_true(region->length >= sizeof(magic));
+
+	memmove(&magic, region->base, sizeof(magic));
+	assert_true(magic == stop_magic || magic == send_magic);
+
+	if (magic == send_magic) {
+		if (!noanswer) {
+			isc_nmhandle_t *sendhandle = NULL;
+			isc_nmhandle_attach(handle, &sendhandle);
+			isc_refcount_increment0(&active_ssends);
+			isc_nmhandle_setwritetimeout(sendhandle, T_IDLE);
+			isc_nm_send(sendhandle, &send_msg, listen_send_cb,
+				    cbarg);
+		}
+		return;
+	}
+
+unref:
+	if (handle == cbarg) {
+		isc_refcount_decrement(&active_sreads);
+		isc_nmhandle_detach(&handle);
+	}
+}
+
+static isc_result_t
+listen_accept_cb(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg) {
+	UNUSED(handle);
+	UNUSED(cbarg);
+
+	F();
+
+	return (eresult);
+}
+
+static isc_result_t
+stream_accept_cb(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg) {
+	isc_nmhandle_t *readhandle = NULL;
+
+	UNUSED(cbarg);
+
+	F();
+
+	if (eresult != ISC_R_SUCCESS) {
+		return (eresult);
+	}
+
+	atomic_fetch_add(&saccepts, 1);
+
+	isc_refcount_increment0(&active_sreads);
+	isc_nmhandle_attach(handle, &readhandle);
+	isc_nm_read(handle, listen_read_cb, readhandle);
+
+	return (ISC_R_SUCCESS);
+}
+
+typedef void (*connect_func)(isc_nm_t *);
+
+static isc_threadresult_t
+connect_thread(isc_threadarg_t arg) {
+	connect_func connect = (connect_func)arg;
+	isc_sockaddr_t connect_addr;
+
+	connect_addr = (isc_sockaddr_t){ .length = 0 };
+	isc_sockaddr_fromin6(&connect_addr, &in6addr_loopback, 0);
+
+	while (atomic_load(&do_send)) {
+		uint_fast32_t active =
+			isc_refcount_increment0(&active_cconnects);
+		if (active > workers) {
+			/*
+			 * If we have more active connections than workers,
+			 * start slowing down the connections to prevent the
+			 * thundering herd problem.
+			 */
+			isc_test_nap((active - workers) * 1000);
+		}
+		connect(connect_nm);
+	}
+
+	return ((isc_threadresult_t)0);
+}
+
+/* UDP */
+
+static void
+udp_connect(isc_nm_t *nm) {
+	isc_nm_udpconnect(nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+}
+
+static void
+mock_listenudp_uv_udp_open(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	WILL_RETURN(uv_udp_open, UV_ENOMEM);
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, noop_recv_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_not_equal(result, ISC_R_SUCCESS);
+	assert_null(listen_sock);
+
+	RESET_RETURN;
+}
+
+static void
+mock_listenudp_uv_udp_bind(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	WILL_RETURN(uv_udp_bind, UV_EADDRINUSE);
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, noop_recv_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_not_equal(result, ISC_R_SUCCESS);
+	assert_null(listen_sock);
+
+	RESET_RETURN;
+}
+
+static void
+mock_listenudp_uv_udp_recv_start(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	WILL_RETURN(uv_udp_recv_start, UV_EADDRINUSE);
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, noop_recv_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_not_equal(result, ISC_R_SUCCESS);
+	assert_null(listen_sock);
+
+	RESET_RETURN;
+}
+
+static void
+mock_udpconnect_uv_udp_open(void **state __attribute__((unused))) {
+	WILL_RETURN(uv_udp_open, UV_ENOMEM);
+
+	connect_readcb = NULL;
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+	isc__netmgr_shutdown(connect_nm);
+
+	RESET_RETURN;
+}
+
+static void
+mock_udpconnect_uv_udp_bind(void **state __attribute__((unused))) {
+	WILL_RETURN(uv_udp_bind, UV_ENOMEM);
+
+	connect_readcb = NULL;
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+	isc__netmgr_shutdown(connect_nm);
+
+	RESET_RETURN;
+}
+
+#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
+static void
+mock_udpconnect_uv_udp_connect(void **state __attribute__((unused))) {
+	WILL_RETURN(uv_udp_connect, UV_ENOMEM);
+
+	connect_readcb = NULL;
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+	isc__netmgr_shutdown(connect_nm);
+
+	RESET_RETURN;
+}
+#endif
+
+static void
+mock_udpconnect_uv_recv_buffer_size(void **state __attribute__((unused))) {
+	WILL_RETURN(uv_recv_buffer_size, UV_ENOMEM);
+
+	connect_readcb = NULL;
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+	isc__netmgr_shutdown(connect_nm);
+
+	RESET_RETURN;
+}
+
+static void
+mock_udpconnect_uv_send_buffer_size(void **state __attribute__((unused))) {
+	WILL_RETURN(uv_send_buffer_size, UV_ENOMEM);
+
+	connect_readcb = NULL;
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+	isc__netmgr_shutdown(connect_nm);
+
+	RESET_RETURN;
+}
+
+static void
+udp_noop(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, noop_recv_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	connect_readcb = NULL;
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+	isc__netmgr_shutdown(connect_nm);
+
+	atomic_assert_int_eq(cconnects, 0);
+	atomic_assert_int_eq(csends, 0);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 0);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+udp_noresponse(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, noop_recv_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_EQ(csends, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 1);
+	atomic_assert_int_eq(csends, 1);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 0);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+timeout_retry_cb(isc_nmhandle_t *handle, isc_result_t eresult,
+		 isc_region_t *region, void *cbarg) {
+	UNUSED(region);
+	UNUSED(cbarg);
+
+	assert_non_null(handle);
+
+	F();
+
+	if (eresult == ISC_R_TIMEDOUT && atomic_load(&csends) < 5) {
+		isc_nmhandle_settimeout(handle, T_SOFT);
+		connect_send(handle);
+		return;
+	}
+
+	atomic_fetch_add(&ctimeouts, 1);
+
+	isc_refcount_decrement(&active_creads);
+	isc_nmhandle_detach(&handle);
+}
+
+static void
+udp_timeout_recovery(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	SKIP_IN_CI;
+
+	/*
+	 * Listen using the noop callback so that client reads will time out.
+	 */
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, noop_recv_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	/*
+	 * Connect with client timeout set to 0.05 seconds, then sleep for at
+	 * least a second for each 'tick'. timeout_retry_cb() will give up
+	 * after five timeouts.
+	 */
+	connect_readcb = timeout_retry_cb;
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_SOFT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_GE(csends, 1);
+	WAIT_FOR_GE(csends, 2);
+	WAIT_FOR_GE(csends, 3);
+	WAIT_FOR_GE(csends, 4);
+	WAIT_FOR_EQ(csends, 5);
+	WAIT_FOR_EQ(ctimeouts, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+}
+
+static void
+udp_recv_one(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	atomic_store(&nsends, 1);
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, listen_read_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_LE(nsends, 0);
+	WAIT_FOR_EQ(csends, 1);
+	WAIT_FOR_EQ(sreads, 1);
+	WAIT_FOR_EQ(ssends, 0);
+	WAIT_FOR_EQ(creads, 0);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 1);
+	atomic_assert_int_eq(csends, 1);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 1);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+udp_recv_two(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	atomic_store(&nsends, 2);
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, listen_read_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_udpconnect(connect_nm, &udp_connect_addr, &udp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 2);
+	WAIT_FOR_LE(nsends, 0);
+	WAIT_FOR_EQ(csends, 2);
+	WAIT_FOR_EQ(sreads, 2);
+	WAIT_FOR_EQ(ssends, 1);
+	WAIT_FOR_EQ(creads, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 2);
+	atomic_assert_int_eq(csends, 2);
+	atomic_assert_int_eq(creads, 1);
+	atomic_assert_int_eq(sreads, 2);
+	atomic_assert_int_eq(ssends, 1);
+}
+
+static void
+udp_recv_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+
+	SKIP_IN_CI;
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, listen_read_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, udp_connect, &threads[i]);
+	}
+
+	WAIT_FOR_GE(cconnects, esends);
+	WAIT_FOR_GE(csends, esends);
+	WAIT_FOR_GE(sreads, esends);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	isc__netmgr_shutdown(connect_nm);
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_FULL(csends);
+	CHECK_RANGE_FULL(creads);
+	CHECK_RANGE_FULL(sreads);
+	CHECK_RANGE_FULL(ssends);
+}
+
+static void
+udp_recv_half_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+
+	SKIP_IN_CI;
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, listen_read_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, udp_connect, &threads[i]);
+	}
+
+	WAIT_FOR_GE(cconnects, esends / 2);
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc__netmgr_shutdown(connect_nm);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_FULL(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+static void
+udp_half_recv_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+
+	SKIP_IN_CI;
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, listen_read_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, udp_connect, &threads[i]);
+	}
+
+	WAIT_FOR_GE(cconnects, esends / 2);
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	/* Try to send a little while longer */
+	isc_test_nap((esends / 2) * 10000);
+
+	isc__netmgr_shutdown(connect_nm);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_FULL(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+static void
+udp_half_recv_half_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+
+	SKIP_IN_CI;
+
+	result = isc_nm_listenudp(listen_nm, &udp_listen_addr, listen_read_cb,
+				  NULL, 0, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, udp_connect, &threads[i]);
+	}
+
+	WAIT_FOR_GE(cconnects, esends / 2);
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc__netmgr_shutdown(connect_nm);
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_FULL(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+/* Common stream protocols code */
+
+static isc_quota_t *
+tcp_listener_init_quota(size_t nthreads) {
+	isc_quota_t *quotap = NULL;
+	if (atomic_load(&check_listener_quota)) {
+		unsigned max_quota = ISC_MAX(nthreads / 2, 1);
+		isc_quota_max(&listener_quota, max_quota);
+		quotap = &listener_quota;
+	}
+	return (quotap);
+}
+
+static void
+tcp_connect(isc_nm_t *nm) {
+	isc_nm_tcpconnect(nm, &tcp_connect_addr, &tcp_listen_addr,
+			  connect_connect_cb, NULL, T_CONNECT, 0);
+}
+
+static stream_connect_function
+get_stream_connect_function(void) {
+	return (tcp_connect);
+}
+
+static isc_result_t
+stream_listen(isc_nm_accept_cb_t accept_cb, void *accept_cbarg,
+	      size_t extrahandlesize, int backlog, isc_quota_t *quota,
+	      isc_nmsocket_t **sockp) {
+	isc_result_t result = ISC_R_SUCCESS;
+
+	result = isc_nm_listentcp(listen_nm, &tcp_listen_addr, accept_cb,
+				  accept_cbarg, extrahandlesize, backlog, quota,
+				  sockp);
+
+	return (result);
+}
+
+static void
+stream_connect(isc_nm_cb_t cb, void *cbarg, unsigned int timeout,
+	       size_t extrahandlesize) {
+	isc_nm_tcpconnect(connect_nm, &tcp_connect_addr, &tcp_listen_addr, cb,
+			  cbarg, timeout, extrahandlesize);
+}
+
+static void
+stream_noop(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	result = stream_listen(noop_accept_cb, NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	connect_readcb = NULL;
+	isc_refcount_increment0(&active_cconnects);
+	stream_connect(connect_connect_cb, NULL, T_CONNECT, 0);
+	isc__netmgr_shutdown(connect_nm);
+
+	atomic_assert_int_eq(cconnects, 0);
+	atomic_assert_int_eq(csends, 0);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 0);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+stream_noresponse(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	result = stream_listen(noop_accept_cb, NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_refcount_increment0(&active_cconnects);
+	stream_connect(connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_EQ(csends, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 1);
+	atomic_assert_int_eq(csends, 1);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 0);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+stream_timeout_recovery(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	SKIP_IN_CI;
+
+	/*
+	 * Accept connections but don't send responses, forcing client
+	 * reads to time out.
+	 */
+	noanswer = true;
+	result = stream_listen(stream_accept_cb, NULL, 0, 0, NULL,
+			       &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	/*
+	 * Shorten all the client timeouts to 0.05 seconds.
+	 */
+	isc_nm_settimeouts(connect_nm, T_SOFT, T_SOFT, T_SOFT, T_SOFT);
+	connect_readcb = timeout_retry_cb;
+	isc_refcount_increment0(&active_cconnects);
+	stream_connect(connect_connect_cb, NULL, T_SOFT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_GE(csends, 1);
+	WAIT_FOR_GE(csends, 2);
+	WAIT_FOR_GE(csends, 3);
+	WAIT_FOR_GE(csends, 4);
+	WAIT_FOR_EQ(csends, 5);
+	WAIT_FOR_EQ(ctimeouts, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+}
+
+static void
+stream_recv_one(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_quota_t *quotap = tcp_listener_init_quota(1);
+
+	atomic_store(&nsends, 1);
+
+	result = stream_listen(stream_accept_cb, NULL, 0, 0, quotap,
+			       &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_refcount_increment0(&active_cconnects);
+	stream_connect(connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_LE(nsends, 0);
+	WAIT_FOR_EQ(csends, 1);
+	WAIT_FOR_EQ(sreads, 1);
+	WAIT_FOR_EQ(ssends, 0);
+	WAIT_FOR_EQ(creads, 0);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 1);
+	atomic_assert_int_eq(csends, 1);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 1);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+stream_recv_two(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_quota_t *quotap = tcp_listener_init_quota(1);
+
+	atomic_store(&nsends, 2);
+
+	result = stream_listen(stream_accept_cb, NULL, 0, 0, quotap,
+			       &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_refcount_increment0(&active_cconnects);
+	stream_connect(connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+
+	isc_refcount_increment0(&active_cconnects);
+	stream_connect(connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 2);
+	WAIT_FOR_LE(nsends, 0);
+	WAIT_FOR_EQ(csends, 2);
+	WAIT_FOR_EQ(sreads, 2);
+	WAIT_FOR_EQ(ssends, 1);
+	WAIT_FOR_EQ(creads, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 2);
+	atomic_assert_int_eq(csends, 2);
+	atomic_assert_int_eq(creads, 1);
+	atomic_assert_int_eq(sreads, 2);
+	atomic_assert_int_eq(ssends, 1);
+}
+
+static void
+stream_recv_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+	isc_quota_t *quotap = tcp_listener_init_quota(workers);
+
+	SKIP_IN_CI;
+
+	result = stream_listen(stream_accept_cb, NULL, 0, 0, quotap,
+			       &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, get_stream_connect_function(),
+				  &threads[i]);
+	}
+
+	if (allow_send_back) {
+		WAIT_FOR_GE(cconnects, 1);
+	} else {
+		WAIT_FOR_GE(cconnects, esends);
+	}
+	WAIT_FOR_GE(csends, esends);
+	WAIT_FOR_GE(sreads, esends);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	isc__netmgr_shutdown(connect_nm);
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_FULL(csends);
+	CHECK_RANGE_FULL(creads);
+	CHECK_RANGE_FULL(sreads);
+	CHECK_RANGE_FULL(ssends);
+}
+
+static void
+stream_recv_half_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+	isc_quota_t *quotap = tcp_listener_init_quota(workers);
+
+	SKIP_IN_CI;
+
+	result = stream_listen(stream_accept_cb, NULL, 0, 0, quotap,
+			       &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, get_stream_connect_function(),
+				  &threads[i]);
+	}
+
+	if (allow_send_back) {
+		WAIT_FOR_GE(cconnects, 1);
+	} else {
+		WAIT_FOR_GE(cconnects, esends / 2);
+	}
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc__netmgr_shutdown(connect_nm);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_HALF(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+static void
+stream_half_recv_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+	isc_quota_t *quotap = tcp_listener_init_quota(workers);
+
+	SKIP_IN_CI;
+
+	result = stream_listen(stream_accept_cb, NULL, 0, 0, quotap,
+			       &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, get_stream_connect_function(),
+				  &threads[i]);
+	}
+
+	if (allow_send_back) {
+		WAIT_FOR_GE(cconnects, 1);
+	} else {
+		WAIT_FOR_GE(cconnects, esends / 2);
+	}
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	/* Try to send a little while longer */
+	isc_test_nap((esends / 2) * 10000);
+
+	isc__netmgr_shutdown(connect_nm);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_HALF(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+static void
+stream_half_recv_half_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+	isc_quota_t *quotap = tcp_listener_init_quota(workers);
+
+	SKIP_IN_CI;
+
+	result = stream_listen(stream_accept_cb, NULL, 0, 0, quotap,
+			       &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, get_stream_connect_function(),
+				  &threads[i]);
+	}
+
+	if (allow_send_back) {
+		WAIT_FOR_GE(cconnects, 1);
+	} else {
+		WAIT_FOR_GE(cconnects, esends / 2);
+	}
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc__netmgr_shutdown(connect_nm);
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_HALF(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+/* TCP */
+static void
+tcp_noop(void **state) {
+	stream_noop(state);
+}
+
+static void
+tcp_noresponse(void **state) {
+	stream_noresponse(state);
+}
+
+static void
+tcp_timeout_recovery(void **state) {
+	stream_timeout_recovery(state);
+}
+
+static void
+tcp_recv_one(void **state) {
+	stream_recv_one(state);
+}
+
+static void
+tcp_recv_two(void **state) {
+	stream_recv_two(state);
+}
+
+static void
+tcp_recv_send(void **state) {
+	SKIP_IN_CI;
+	stream_recv_send(state);
+}
+
+static void
+tcp_recv_half_send(void **state) {
+	SKIP_IN_CI;
+	stream_recv_half_send(state);
+}
+
+static void
+tcp_half_recv_send(void **state) {
+	SKIP_IN_CI;
+	stream_half_recv_send(state);
+}
+
+static void
+tcp_half_recv_half_send(void **state) {
+	SKIP_IN_CI;
+	stream_half_recv_half_send(state);
+}
+
+static void
+tcp_recv_send_sendback(void **state) {
+	SKIP_IN_CI;
+	stream_recv_send(state);
+}
+
+static void
+tcp_recv_half_send_sendback(void **state) {
+	SKIP_IN_CI;
+	stream_recv_half_send(state);
+}
+
+static void
+tcp_half_recv_send_sendback(void **state) {
+	SKIP_IN_CI;
+	stream_half_recv_send(state);
+}
+
+static void
+tcp_half_recv_half_send_sendback(void **state) {
+	SKIP_IN_CI;
+	stream_half_recv_half_send(state);
+}
+
+/* TCP Quota */
+
+static void
+tcp_recv_one_quota(void **state) {
+	atomic_store(&check_listener_quota, true);
+	stream_recv_one(state);
+}
+
+static void
+tcp_recv_two_quota(void **state) {
+	atomic_store(&check_listener_quota, true);
+	stream_recv_two(state);
+}
+
+static void
+tcp_recv_send_quota(void **state) {
+	SKIP_IN_CI;
+	atomic_store(&check_listener_quota, true);
+	stream_recv_send(state);
+}
+
+static void
+tcp_recv_half_send_quota(void **state) {
+	SKIP_IN_CI;
+	atomic_store(&check_listener_quota, true);
+	stream_recv_half_send(state);
+}
+
+static void
+tcp_half_recv_send_quota(void **state) {
+	SKIP_IN_CI;
+	atomic_store(&check_listener_quota, true);
+	stream_half_recv_send(state);
+}
+
+static void
+tcp_half_recv_half_send_quota(void **state) {
+	SKIP_IN_CI;
+	atomic_store(&check_listener_quota, true);
+	stream_half_recv_half_send(state);
+}
+
+static void
+tcp_recv_send_quota_sendback(void **state) {
+	SKIP_IN_CI;
+	atomic_store(&check_listener_quota, true);
+	allow_send_back = true;
+	stream_recv_send(state);
+}
+
+static void
+tcp_recv_half_send_quota_sendback(void **state) {
+	SKIP_IN_CI;
+	atomic_store(&check_listener_quota, true);
+	allow_send_back = true;
+	stream_recv_half_send(state);
+}
+
+static void
+tcp_half_recv_send_quota_sendback(void **state) {
+	SKIP_IN_CI;
+	atomic_store(&check_listener_quota, true);
+	allow_send_back = true;
+	stream_half_recv_send(state);
+}
+
+static void
+tcp_half_recv_half_send_quota_sendback(void **state) {
+	SKIP_IN_CI;
+	atomic_store(&check_listener_quota, true);
+	allow_send_back = true;
+	stream_half_recv_half_send(state);
+}
+
+/* TCPDNS */
+
+static void
+tcpdns_connect(isc_nm_t *nm) {
+	isc_nm_tcpdnsconnect(nm, &tcp_connect_addr, &tcp_listen_addr,
+			     connect_connect_cb, NULL, T_CONNECT, 0);
+}
+
+static void
+tcpdns_noop(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr, noop_recv_cb,
+				     NULL, noop_accept_cb, NULL, 0, 0, NULL,
+				     &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	connect_readcb = NULL;
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_tcpdnsconnect(connect_nm, &tcp_connect_addr, &tcp_listen_addr,
+			     connect_connect_cb, NULL, T_CONNECT, 0);
+	isc__netmgr_shutdown(connect_nm);
+
+	atomic_assert_int_eq(cconnects, 0);
+	atomic_assert_int_eq(csends, 0);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 0);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+tcpdns_noresponse(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	isc_refcount_increment0(&active_cconnects);
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr, noop_recv_cb,
+				     NULL, noop_accept_cb, NULL, 0, 0, NULL,
+				     &listen_sock);
+	if (result != ISC_R_SUCCESS) {
+		isc_refcount_decrement(&active_cconnects);
+		isc_test_nap(1000);
+	}
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_nm_tcpdnsconnect(connect_nm, &tcp_connect_addr, &tcp_listen_addr,
+			     connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_EQ(csends, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 1);
+	atomic_assert_int_eq(csends, 1);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 0);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+tcpdns_timeout_recovery(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	SKIP_IN_CI;
+
+	/*
+	 * Accept connections but don't send responses, forcing client
+	 * reads to time out.
+	 */
+	noanswer = true;
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr,
+				     listen_read_cb, NULL, listen_accept_cb,
+				     NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	/*
+	 * Shorten all the TCP client timeouts to 0.05 seconds, connect,
+	 * then sleep for at least a second for each 'tick'.
+	 * timeout_retry_cb() will give up after five timeouts.
+	 */
+	connect_readcb = timeout_retry_cb;
+	isc_nm_settimeouts(connect_nm, T_SOFT, T_SOFT, T_SOFT, T_SOFT);
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_tcpdnsconnect(connect_nm, &tcp_connect_addr, &tcp_listen_addr,
+			     connect_connect_cb, NULL, T_SOFT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_GE(csends, 1);
+	WAIT_FOR_GE(csends, 2);
+	WAIT_FOR_GE(csends, 3);
+	WAIT_FOR_GE(csends, 4);
+	WAIT_FOR_EQ(csends, 5);
+	WAIT_FOR_EQ(ctimeouts, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+}
+
+static void
+tcpdns_recv_one(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	atomic_store(&nsends, 1);
+
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr,
+				     listen_read_cb, NULL, listen_accept_cb,
+				     NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_tcpdnsconnect(connect_nm, &tcp_connect_addr, &tcp_listen_addr,
+			     connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+	WAIT_FOR_LE(nsends, 0);
+	WAIT_FOR_EQ(csends, 1);
+	WAIT_FOR_EQ(sreads, 1);
+	WAIT_FOR_EQ(ssends, 0);
+	WAIT_FOR_EQ(creads, 0);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 1);
+	atomic_assert_int_eq(csends, 1);
+	atomic_assert_int_eq(creads, 0);
+	atomic_assert_int_eq(sreads, 1);
+	atomic_assert_int_eq(ssends, 0);
+}
+
+static void
+tcpdns_recv_two(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+
+	atomic_store(&nsends, 2);
+
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr,
+				     listen_read_cb, NULL, listen_accept_cb,
+				     NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_tcpdnsconnect(connect_nm, &tcp_connect_addr, &tcp_listen_addr,
+			     connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 1);
+
+	isc_refcount_increment0(&active_cconnects);
+	isc_nm_tcpdnsconnect(connect_nm, &tcp_connect_addr, &tcp_listen_addr,
+			     connect_connect_cb, NULL, T_CONNECT, 0);
+
+	WAIT_FOR_EQ(cconnects, 2);
+
+	WAIT_FOR_LE(nsends, 0);
+	WAIT_FOR_EQ(csends, 2);
+	WAIT_FOR_EQ(sreads, 2);
+	WAIT_FOR_EQ(ssends, 1);
+	WAIT_FOR_EQ(creads, 1);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+	isc__netmgr_shutdown(connect_nm);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	atomic_assert_int_eq(cconnects, 2);
+	atomic_assert_int_eq(csends, 2);
+	atomic_assert_int_eq(creads, 1);
+	atomic_assert_int_eq(sreads, 2);
+	atomic_assert_int_eq(ssends, 1);
+}
+
+static void
+tcpdns_recv_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+
+	SKIP_IN_CI;
+
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr,
+				     listen_read_cb, NULL, listen_accept_cb,
+				     NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, tcpdns_connect, &threads[i]);
+	}
+
+	WAIT_FOR_GE(cconnects, esends);
+	WAIT_FOR_GE(csends, esends);
+	WAIT_FOR_GE(sreads, esends);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	isc__netmgr_shutdown(connect_nm);
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_FULL(csends);
+	CHECK_RANGE_FULL(creads);
+	CHECK_RANGE_FULL(sreads);
+	CHECK_RANGE_FULL(ssends);
+}
+
+static void
+tcpdns_recv_half_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+
+	SKIP_IN_CI;
+
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr,
+				     listen_read_cb, NULL, listen_accept_cb,
+				     NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, tcpdns_connect, &threads[i]);
+	}
+
+	WAIT_FOR_GE(cconnects, esends / 2);
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc__netmgr_shutdown(connect_nm);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_HALF(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+static void
+tcpdns_half_recv_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+
+	SKIP_IN_CI;
+
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr,
+				     listen_read_cb, NULL, listen_accept_cb,
+				     NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, tcpdns_connect, &threads[i]);
+	}
+
+	WAIT_FOR_GE(cconnects, esends / 2);
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	/* Try to send a little while longer */
+	isc_test_nap((esends / 2) * 10000);
+
+	isc__netmgr_shutdown(connect_nm);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_HALF(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+static void
+tcpdns_half_recv_half_send(void **state __attribute__((unused))) {
+	isc_result_t result = ISC_R_SUCCESS;
+	isc_nmsocket_t *listen_sock = NULL;
+	isc_thread_t threads[workers];
+
+	SKIP_IN_CI;
+
+	result = isc_nm_listentcpdns(listen_nm, &tcp_listen_addr,
+				     listen_read_cb, NULL, listen_accept_cb,
+				     NULL, 0, 0, NULL, &listen_sock);
+	assert_int_equal(result, ISC_R_SUCCESS);
+
+	memset(threads, 0, sizeof(threads));
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_create(connect_thread, tcpdns_connect, &threads[i]);
+	}
+
+	WAIT_FOR_GE(cconnects, esends / 2);
+	WAIT_FOR_GE(csends, esends / 2);
+	WAIT_FOR_GE(sreads, esends / 2);
+	WAIT_FOR_GE(ssends, esends / 2);
+	WAIT_FOR_GE(creads, esends / 2);
+
+	isc__netmgr_shutdown(connect_nm);
+	isc_nm_stoplistening(listen_sock);
+	isc_nmsocket_close(&listen_sock);
+	assert_null(listen_sock);
+
+	DONE();
+	for (size_t i = 0; i < workers; i++) {
+		isc_thread_join(threads[i], NULL);
+	}
+
+	X(cconnects);
+	X(csends);
+	X(creads);
+	X(sreads);
+	X(ssends);
+
+	CHECK_RANGE_HALF(csends);
+	CHECK_RANGE_HALF(creads);
+	CHECK_RANGE_HALF(sreads);
+	CHECK_RANGE_HALF(ssends);
+}
+
+int
+main(void) {
+	const struct CMUnitTest tests[] = {
+		/* UDP */
+		cmocka_unit_test_setup_teardown(mock_listenudp_uv_udp_open,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(mock_listenudp_uv_udp_bind,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(
+			mock_listenudp_uv_udp_recv_start, nm_setup,
+			nm_teardown),
+		cmocka_unit_test_setup_teardown(mock_udpconnect_uv_udp_open,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(mock_udpconnect_uv_udp_bind,
+						nm_setup, nm_teardown),
+#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
+		cmocka_unit_test_setup_teardown(mock_udpconnect_uv_udp_connect,
+						nm_setup, nm_teardown),
+#endif
+		cmocka_unit_test_setup_teardown(
+			mock_udpconnect_uv_recv_buffer_size, nm_setup,
+			nm_teardown),
+		cmocka_unit_test_setup_teardown(
+			mock_udpconnect_uv_send_buffer_size, nm_setup,
+			nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_noop, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_noresponse, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_timeout_recovery, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_recv_one, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_recv_two, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_recv_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_recv_half_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_half_recv_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(udp_half_recv_half_send,
+						nm_setup, nm_teardown),
+
+		/* TCP */
+		cmocka_unit_test_setup_teardown(tcp_noop, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_noresponse, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_timeout_recovery, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_one, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_two, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_half_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_half_recv_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_half_recv_half_send,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_send_sendback,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_half_send_sendback,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_half_recv_send_sendback,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(
+			tcp_half_recv_half_send_sendback, nm_setup,
+			nm_teardown),
+
+		/* TCP Quota */
+		cmocka_unit_test_setup_teardown(tcp_recv_one_quota, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_two_quota, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_send_quota, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_half_send_quota,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_half_recv_send_quota,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_half_recv_half_send_quota,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(tcp_recv_send_quota_sendback,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(
+			tcp_recv_half_send_quota_sendback, nm_setup,
+			nm_teardown),
+		cmocka_unit_test_setup_teardown(
+			tcp_half_recv_send_quota_sendback, nm_setup,
+			nm_teardown),
+		cmocka_unit_test_setup_teardown(
+			tcp_half_recv_half_send_quota_sendback, nm_setup,
+			nm_teardown),
+
+		/* TCPDNS */
+		cmocka_unit_test_setup_teardown(tcpdns_recv_one, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcpdns_recv_two, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcpdns_noop, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcpdns_noresponse, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcpdns_timeout_recovery,
+						nm_setup, nm_teardown),
+		cmocka_unit_test_setup_teardown(tcpdns_recv_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcpdns_recv_half_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcpdns_half_recv_send, nm_setup,
+						nm_teardown),
+		cmocka_unit_test_setup_teardown(tcpdns_half_recv_half_send,
+						nm_setup, nm_teardown),
+
+	};
+
+	return (cmocka_run_group_tests(tests, _setup, _teardown));
+}
+
+#else /* HAVE_CMOCKA */
+
+#include <stdio.h>
+
+int
+main(void) {
+	printf("1..0 # Skipped: cmocka not available\n");
+	return (SKIPPED_TEST_EXIT_CODE);
+}
+
+#endif /* if HAVE_CMOCKA */