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bind9/tests/dns/dispatch_test.c
Ondřej Surý b69e783164
Update netmgr, tasks, and applications to use isc_loopmgr 
Previously:

* applications were using isc_app as the base unit for running the
  application and signal handling.

* networking was handled in the netmgr layer, which would start a
  number of threads, each with a uv_loop event loop.

* task/event handling was done in the isc_task unit, which used
  netmgr event loops to run the isc_event calls.

In this refactoring:

* the network manager now uses isc_loop instead of maintaining its
  own worker threads and event loops.

* the taskmgr that manages isc_task instances now also uses isc_loopmgr,
  and every isc_task runs on a specific isc_loop bound to the specific
  thread.

* applications have been updated as necessary to use the new API.

* new ISC_LOOP_TEST macros have been added to enable unit tests to
  run isc_loop event loops. unit tests have been updated to use this
  where needed.
2022-08-26 09:09:24 +02:00

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/*
* 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.
*/
#include <inttypes.h>
#include <sched.h> /* IWYU pragma: keep */
#include <setjmp.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define UNIT_TESTING
#include <cmocka.h>
#include <isc/buffer.h>
#include <isc/managers.h>
#include <isc/refcount.h>
#include <isc/util.h>
#include <isc/uv.h>
#include <dns/dispatch.h>
#include <dns/name.h>
#include <dns/view.h>
#include <tests/dns.h>
/* Timeouts in miliseconds */
#define T_SERVER_INIT 5000
#define T_SERVER_IDLE 5000
#define T_SERVER_KEEPALIVE 5000
#define T_SERVER_ADVERTISED 5000
#define T_CLIENT_INIT 2000
#define T_CLIENT_IDLE 2000
#define T_CLIENT_KEEPALIVE 2000
#define T_CLIENT_ADVERTISED 2000
#define T_CLIENT_CONNECT 1000
/* dns_dispatchset_t *dset = NULL; */
static isc_sockaddr_t udp_server_addr;
static isc_sockaddr_t udp_connect_addr;
static isc_sockaddr_t tcp_server_addr;
static isc_sockaddr_t tcp_connect_addr;
static dns_dispatchmgr_t *dispatchmgr = NULL;
static dns_dispatch_t *dispatch = NULL;
static isc_nmsocket_t *sock = NULL;
static isc_nm_t *connect_nm = NULL;
const struct in6_addr in6addr_blackhole = { { { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1 } } };
struct {
uint8_t rbuf[12];
isc_region_t region;
uint8_t message[12];
} testdata;
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()");
close(fd);
return (r);
}
r = getsockname(fd, (struct sockaddr *)&addr->type.sa, &addrlen);
if (r != 0) {
perror("setup_ephemeral_port: getsockname()");
close(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");
close(fd);
return (r);
}
#endif
return (fd);
}
static int
setup_test(void **state) {
uv_os_sock_t socket = -1;
setup_loopmgr(state);
setup_netmgr(state);
isc_netmgr_create(mctx, loopmgr, &connect_nm);
udp_connect_addr = (isc_sockaddr_t){ .length = 0 };
isc_sockaddr_fromin6(&udp_connect_addr, &in6addr_loopback, 0);
tcp_connect_addr = (isc_sockaddr_t){ .length = 0 };
isc_sockaddr_fromin6(&tcp_connect_addr, &in6addr_loopback, 0);
udp_server_addr = (isc_sockaddr_t){ .length = 0 };
socket = setup_ephemeral_port(&udp_server_addr, SOCK_DGRAM);
if (socket < 0) {
return (-1);
}
close(socket);
tcp_server_addr = (isc_sockaddr_t){ .length = 0 };
socket = setup_ephemeral_port(&tcp_server_addr, SOCK_STREAM);
if (socket < 0) {
return (-1);
}
close(socket);
isc_nm_settimeouts(netmgr, T_SERVER_INIT, T_SERVER_IDLE,
T_SERVER_KEEPALIVE, T_SERVER_ADVERTISED);
/*
* Use shorter client-side timeouts, to ensure that clients
* time out before the server.
*/
isc_nm_settimeouts(connect_nm, T_CLIENT_INIT, T_CLIENT_IDLE,
T_CLIENT_KEEPALIVE, T_CLIENT_ADVERTISED);
memset(testdata.rbuf, 0, sizeof(testdata.rbuf));
testdata.region.base = testdata.rbuf;
testdata.region.length = sizeof(testdata.rbuf);
memset(testdata.message, 0, sizeof(testdata.message));
return (0);
}
static int
teardown_test(void **state) {
isc_netmgr_destroy(&connect_nm);
teardown_netmgr(state);
teardown_loopmgr(state);
return (0);
}
static isc_result_t
make_dispatchset(unsigned int ndisps, dns_dispatchset_t **dsetp) {
isc_result_t result;
isc_sockaddr_t any;
dns_dispatch_t *disp = NULL;
isc_sockaddr_any(&any);
result = dns_dispatch_createudp(dispatchmgr, &any, &disp);
if (result != ISC_R_SUCCESS) {
return (result);
}
result = dns_dispatchset_create(mctx, disp, dsetp, ndisps);
dns_dispatch_detach(&disp);
return (result);
}
/* create dispatch set */
ISC_LOOP_TEST_IMPL(dispatchset_create) {
dns_dispatchset_t *dset = NULL;
isc_result_t result;
UNUSED(arg);
result = dns_dispatchmgr_create(mctx, connect_nm, &dispatchmgr);
assert_int_equal(result, ISC_R_SUCCESS);
result = make_dispatchset(1, &dset);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatchset_destroy(&dset);
result = make_dispatchset(10, &dset);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatchset_destroy(&dset);
dns_dispatchmgr_detach(&dispatchmgr);
isc_loopmgr_shutdown(loopmgr);
}
/* test dispatch set round-robin */
ISC_LOOP_TEST_IMPL(dispatchset_get) {
isc_result_t result;
dns_dispatchset_t *dset = NULL;
dns_dispatch_t *d1, *d2, *d3, *d4, *d5;
UNUSED(arg);
result = dns_dispatchmgr_create(mctx, connect_nm, &dispatchmgr);
assert_int_equal(result, ISC_R_SUCCESS);
result = make_dispatchset(1, &dset);
assert_int_equal(result, ISC_R_SUCCESS);
d1 = dns_dispatchset_get(dset);
d2 = dns_dispatchset_get(dset);
d3 = dns_dispatchset_get(dset);
d4 = dns_dispatchset_get(dset);
d5 = dns_dispatchset_get(dset);
assert_ptr_equal(d1, d2);
assert_ptr_equal(d2, d3);
assert_ptr_equal(d3, d4);
assert_ptr_equal(d4, d5);
dns_dispatchset_destroy(&dset);
result = make_dispatchset(4, &dset);
assert_int_equal(result, ISC_R_SUCCESS);
d1 = dns_dispatchset_get(dset);
d2 = dns_dispatchset_get(dset);
d3 = dns_dispatchset_get(dset);
d4 = dns_dispatchset_get(dset);
d5 = dns_dispatchset_get(dset);
assert_ptr_equal(d1, d5);
assert_ptr_not_equal(d1, d2);
assert_ptr_not_equal(d2, d3);
assert_ptr_not_equal(d3, d4);
assert_ptr_not_equal(d4, d5);
dns_dispatchset_destroy(&dset);
dns_dispatchmgr_detach(&dispatchmgr);
isc_loopmgr_shutdown(loopmgr);
}
static dns_dispentry_t *dispentry = NULL;
static atomic_bool first = true;
static void
server_senddone(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg) {
UNUSED(handle);
UNUSED(eresult);
UNUSED(cbarg);
return;
}
static void
nameserver(isc_nmhandle_t *handle, isc_result_t eresult, isc_region_t *region,
void *cbarg) {
isc_region_t response1, response2;
static unsigned char buf1[16];
static unsigned char buf2[16];
UNUSED(eresult);
UNUSED(cbarg);
memmove(buf1, region->base, 12);
memset(buf1 + 12, 0, 4);
buf1[2] |= 0x80; /* qr=1 */
memmove(buf2, region->base, 12);
memset(buf2 + 12, 1, 4);
buf2[2] |= 0x80; /* qr=1 */
/*
* send message to be discarded.
*/
response1.base = buf1;
response1.length = sizeof(buf1);
isc_nm_send(handle, &response1, server_senddone, NULL);
/*
* send nextitem message.
*/
response2.base = buf2;
response2.length = sizeof(buf2);
isc_nm_send(handle, &response2, server_senddone, NULL);
}
static isc_result_t
accept_cb(isc_nmhandle_t *handle, isc_result_t eresult, void *cbarg) {
UNUSED(handle);
UNUSED(cbarg);
return (eresult);
}
static void
noop_nameserver(isc_nmhandle_t *handle, isc_result_t eresult,
isc_region_t *region, void *cbarg) {
UNUSED(handle);
UNUSED(eresult);
UNUSED(region);
UNUSED(cbarg);
}
static void
response_getnext(isc_result_t result, isc_region_t *region, void *arg) {
UNUSED(region);
UNUSED(arg);
if (atomic_compare_exchange_strong(&first, &(bool){ true }, false)) {
result = dns_dispatch_getnext(dispentry);
assert_int_equal(result, ISC_R_SUCCESS);
} else {
dns_dispatch_done(&dispentry);
isc_loopmgr_shutdown(loopmgr);
}
}
static void
response(isc_result_t eresult, isc_region_t *region, void *arg) {
UNUSED(region);
UNUSED(arg);
assert_int_equal(eresult, ISC_R_SUCCESS);
dns_dispatch_done(&dispentry);
isc_loopmgr_shutdown(loopmgr);
}
static void
response_timeout(isc_result_t eresult, isc_region_t *region, void *arg) {
UNUSED(region);
UNUSED(arg);
assert_int_equal(eresult, ISC_R_TIMEDOUT);
dns_dispatch_done(&dispentry);
isc_loopmgr_shutdown(loopmgr);
}
static void
connected(isc_result_t eresult, isc_region_t *region, void *cbarg) {
isc_region_t *r = (isc_region_t *)cbarg;
UNUSED(eresult);
UNUSED(region);
dns_dispatch_send(dispentry, r, -1);
}
static void
client_senddone(isc_result_t eresult, isc_region_t *region, void *cbarg) {
UNUSED(eresult);
UNUSED(region);
UNUSED(cbarg);
}
static void
timeout_connected(isc_result_t eresult, isc_region_t *region, void *cbarg) {
UNUSED(region);
UNUSED(cbarg);
if (eresult == ISC_R_ADDRNOTAVAIL || eresult == ISC_R_CONNREFUSED) {
/* FIXME: Skip */
} else {
assert_int_equal(eresult, ISC_R_TIMEDOUT);
}
dns_dispatch_done(&dispentry);
isc_loopmgr_shutdown(loopmgr);
}
ISC_LOOP_TEST_IMPL(dispatch_timeout_tcp_connect) {
isc_result_t result;
uint16_t id;
/* Client */
tcp_connect_addr = (isc_sockaddr_t){ .length = 0 };
isc_sockaddr_fromin6(&tcp_connect_addr, &in6addr_blackhole, 0);
testdata.region.base = testdata.message;
testdata.region.length = sizeof(testdata.message);
result = dns_dispatchmgr_create(mctx, connect_nm, &dispatchmgr);
assert_int_equal(result, ISC_R_SUCCESS);
result = dns_dispatch_createtcp(dispatchmgr, &tcp_connect_addr,
&tcp_server_addr, -1, &dispatch);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatchmgr_detach(&dispatchmgr);
result = dns_dispatch_add(dispatch, 0, T_CLIENT_CONNECT,
&tcp_server_addr, timeout_connected,
client_senddone, response_timeout,
&testdata.region, &id, &dispentry);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatch_detach(&dispatch);
testdata.message[0] = (id >> 8) & 0xff;
testdata.message[1] = id & 0xff;
dns_dispatch_connect(dispentry);
}
static void
stop_listening(void *arg) {
UNUSED(arg);
isc_nm_stoplistening(sock);
isc_nmsocket_close(&sock);
assert_null(sock);
}
ISC_LOOP_TEST_IMPL(dispatch_timeout_tcp_response) {
isc_result_t result;
uint16_t id;
/* Server */
result = isc_nm_listentcpdns(netmgr, ISC_NM_LISTEN_ONE,
&tcp_server_addr, noop_nameserver, NULL,
accept_cb, NULL, 0, NULL, &sock);
assert_int_equal(result, ISC_R_SUCCESS);
/* ensure we stop listening after the test is done */
isc_loop_teardown(isc_loop_main(loopmgr), stop_listening, sock);
/* Client */
result = dns_dispatchmgr_create(mctx, connect_nm, &dispatchmgr);
assert_int_equal(result, ISC_R_SUCCESS);
result = dns_dispatch_createtcp(dispatchmgr, &tcp_connect_addr,
&tcp_server_addr, -1, &dispatch);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatchmgr_detach(&dispatchmgr);
result = dns_dispatch_add(dispatch, 0, T_CLIENT_CONNECT,
&tcp_server_addr, connected, client_senddone,
response_timeout, &testdata.region, &id,
&dispentry);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatch_detach(&dispatch);
dns_dispatch_connect(dispentry);
}
ISC_LOOP_TEST_IMPL(dispatch_tcp_response) {
isc_result_t result;
uint16_t id;
/* Server */
result = isc_nm_listentcpdns(netmgr, ISC_NM_LISTEN_ONE,
&tcp_server_addr, nameserver, NULL,
accept_cb, NULL, 0, NULL, &sock);
assert_int_equal(result, ISC_R_SUCCESS);
isc_loop_teardown(isc_loop_main(loopmgr), stop_listening, sock);
/* Client */
testdata.region.base = testdata.message;
testdata.region.length = sizeof(testdata.message);
result = dns_dispatchmgr_create(mctx, connect_nm, &dispatchmgr);
assert_int_equal(result, ISC_R_SUCCESS);
result = dns_dispatch_createtcp(dispatchmgr, &tcp_connect_addr,
&tcp_server_addr, -1, &dispatch);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatchmgr_detach(&dispatchmgr);
result = dns_dispatch_add(dispatch, 0, T_CLIENT_CONNECT,
&tcp_server_addr, connected, client_senddone,
response, &testdata.region, &id, &dispentry);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatch_detach(&dispatch);
testdata.message[0] = (id >> 8) & 0xff;
testdata.message[1] = id & 0xff;
dns_dispatch_connect(dispentry);
}
ISC_LOOP_TEST_IMPL(dispatch_timeout_udp_response) {
isc_result_t result;
uint16_t id;
/* Server */
result = dns_dispatchmgr_create(mctx, connect_nm, &dispatchmgr);
assert_int_equal(result, ISC_R_SUCCESS);
result = isc_nm_listenudp(netmgr, ISC_NM_LISTEN_ONE, &udp_server_addr,
noop_nameserver, NULL, &sock);
assert_int_equal(result, ISC_R_SUCCESS);
/* ensure we stop listening after the test is done */
isc_loop_teardown(isc_loop_main(loopmgr), stop_listening, sock);
/* Client */
result = dns_dispatch_createudp(dispatchmgr, &udp_connect_addr,
&dispatch);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatchmgr_detach(&dispatchmgr);
result = dns_dispatch_add(dispatch, 0, T_CLIENT_CONNECT,
&udp_server_addr, connected, client_senddone,
response_timeout, &testdata.region, &id,
&dispentry);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatch_detach(&dispatch);
dns_dispatch_connect(dispentry);
}
/* test dispatch getnext */
ISC_LOOP_TEST_IMPL(dispatch_getnext) {
isc_result_t result;
uint16_t id;
/* Server */
result = isc_nm_listenudp(netmgr, ISC_NM_LISTEN_ONE, &udp_server_addr,
nameserver, NULL, &sock);
assert_int_equal(result, ISC_R_SUCCESS);
isc_loop_teardown(isc_loop_main(loopmgr), stop_listening, sock);
/* Client */
testdata.region.base = testdata.message;
testdata.region.length = sizeof(testdata.message);
result = dns_dispatchmgr_create(mctx, connect_nm, &dispatchmgr);
assert_int_equal(result, ISC_R_SUCCESS);
result = dns_dispatch_createudp(dispatchmgr, &udp_connect_addr,
&dispatch);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatchmgr_detach(&dispatchmgr);
result = dns_dispatch_add(dispatch, 0, T_CLIENT_CONNECT,
&udp_server_addr, connected, client_senddone,
response_getnext, &testdata.region, &id,
&dispentry);
assert_int_equal(result, ISC_R_SUCCESS);
dns_dispatch_detach(&dispatch);
testdata.message[0] = (id >> 8) & 0xff;
testdata.message[1] = id & 0xff;
dns_dispatch_connect(dispentry);
}
ISC_TEST_LIST_START
ISC_TEST_ENTRY_CUSTOM(dispatch_timeout_udp_response, setup_test, teardown_test)
ISC_TEST_ENTRY_CUSTOM(dispatchset_create, setup_test, teardown_test)
ISC_TEST_ENTRY_CUSTOM(dispatchset_get, setup_test, teardown_test)
ISC_TEST_ENTRY_CUSTOM(dispatch_timeout_tcp_response, setup_test, teardown_test)
ISC_TEST_ENTRY_CUSTOM(dispatch_timeout_tcp_connect, setup_test, teardown_test)
ISC_TEST_ENTRY_CUSTOM(dispatch_tcp_response, setup_test, teardown_test)
ISC_TEST_ENTRY_CUSTOM(dispatch_getnext, setup_test, teardown_test)
ISC_TEST_LIST_END
ISC_TEST_MAIN
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