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test: Improve the inbound channel cell test

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First, that test was broken from the previous commit because the
channel_queue_cell() has been removed. This now tests the
channel_process_cell() directly.

Second, it wasn't testing much except if the channel subsystem actually went
through the cell handler. This commit adds more checks on the state of a
channel going from open, receiving a cell and closing.

Third, this and the id_map unit test are working, not the others so they've
been marked as not working and future commit will improve and fix those.

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2017-11-21 16:06:46 -05:00
parent 1dc4f96d9c
commit 636eec32bf
1 changed files with 79 additions and 60 deletions
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139
src/test/test_channel.c
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@ -33,16 +33,14 @@ static double test_overhead_estimate = 1.0;
static int test_releases_count = 0;
static channel_t *dump_statistics_mock_target = NULL;
static int dump_statistics_mock_matches = 0;
static int test_close_called = 0;
static void chan_test_channel_dump_statistics_mock(
channel_t *chan, int severity);
static void chan_test_cell_handler(channel_t *ch,
cell_t *cell);
static const char * chan_test_describe_transport(channel_t *ch);
static void chan_test_dumpstats(channel_t *ch, int severity);
static void chan_test_var_cell_handler(channel_t *ch,
var_cell_t *var_cell);
static void chan_test_close(channel_t *ch);
static void chan_test_error(channel_t *ch);
static void chan_test_finish_close(channel_t *ch);
static const char * chan_test_get_remote_descr(channel_t *ch, int flags);
@ -56,7 +54,6 @@ static int chan_test_write_var_cell(channel_t *ch, var_cell_t *var_cell);
static void scheduler_channel_doesnt_want_writes_mock(channel_t *ch);
static void test_channel_dumpstats(void *arg);
static void test_channel_incoming(void *arg);
static void test_channel_lifecycle(void *arg);
static const char *
@ -93,10 +90,9 @@ chan_test_channel_dump_statistics_mock(channel_t *chan, int severity)
*/
static void
chan_test_cell_handler(channel_t *ch,
cell_t *cell)
chan_test_cell_handler(channel_t *chan, cell_t *cell)
{
tt_assert(ch);
tt_assert(chan);
tt_assert(cell);
test_chan_last_seen_fixed_cell_ptr = cell;
@ -146,6 +142,8 @@ chan_test_close(channel_t *ch)
{
tt_assert(ch);
++test_close_called;
done:
return;
}
@ -348,6 +346,8 @@ new_fake_channel(void)
chan->write_var_cell = chan_test_write_var_cell;
chan->state = CHANNEL_STATE_OPEN;
chan->cmux = circuitmux_alloc();
return chan;
}
@ -516,6 +516,7 @@ test_channel_dumpstats(void *arg)
chan_test_var_cell_handler);
p_cell = packed_cell_new();
old_count = test_chan_fixed_cells_recved;
channel_write_packed_cell(ch, p_cell);
tt_int_op(test_chan_fixed_cells_recved, OP_EQ, old_count + 1);
tt_assert(ch->n_bytes_recved > 0);
tt_assert(ch->n_cells_recved > 0);
@ -545,82 +546,93 @@ test_channel_dumpstats(void *arg)
return;
}
/* Test inbound cell. The callstack is:
* channel_process_cell()
* -> chan->cell_handler()
*
* This test is about checking if we can process an inbound cell down to the
* channel handler. */
static void
test_channel_incoming(void *arg)
test_channel_inbound_cell(void *arg)
{
channel_t *ch = NULL;
channel_t *chan = NULL;
cell_t *cell = NULL;
var_cell_t *var_cell = NULL;
int old_count;
(void)arg;
(void) arg;
/* Mock these for duration of the test */
MOCK(scheduler_channel_doesnt_want_writes,
scheduler_channel_doesnt_want_writes_mock);
MOCK(scheduler_release_channel,
scheduler_release_channel_mock);
/* The channel will be freed so we need to hijack this so the scheduler
* doesn't get confused. */
MOCK(scheduler_release_channel, scheduler_release_channel_mock);
/* Accept cells to lower layer */
test_chan_accept_cells = 1;
/* Use default overhead factor */
test_overhead_estimate = 1.0;
ch = new_fake_channel();
tt_assert(ch);
chan = new_fake_channel();
tt_assert(chan);
/* Start it off in OPENING */
ch->state = CHANNEL_STATE_OPENING;
/* We'll need a cmux */
ch->cmux = circuitmux_alloc();
/* Install incoming cell handlers */
channel_set_cell_handlers(ch,
chan_test_cell_handler,
chan_test_var_cell_handler);
/* Test cell handler getters */
tt_ptr_op(channel_get_cell_handler(ch), OP_EQ, chan_test_cell_handler);
tt_ptr_op(channel_get_var_cell_handler(ch), OP_EQ,
chan_test_var_cell_handler);
chan->state = CHANNEL_STATE_OPENING;
/* Try to register it */
channel_register(ch);
tt_assert(ch->registered);
channel_register(chan);
tt_int_op(chan->registered, OP_EQ, 1);
/* Open it */
channel_change_state_open(ch);
tt_int_op(ch->state, OP_EQ, CHANNEL_STATE_OPEN);
channel_change_state_open(chan);
tt_int_op(chan->state, OP_EQ, CHANNEL_STATE_OPEN);
tt_int_op(chan->has_been_open, OP_EQ, 1);
/* Receive a fixed cell */
cell = tor_malloc_zero(sizeof(cell_t));
/* Receive a cell now. */
cell = tor_malloc_zero(sizeof(*cell));
make_fake_cell(cell);
old_count = test_chan_fixed_cells_recved;
tor_free(cell);
tt_int_op(test_chan_fixed_cells_recved, OP_EQ, old_count + 1);
channel_process_cell(chan, cell);
tt_int_op(test_chan_fixed_cells_recved, OP_EQ, old_count);
tt_u64_op(chan->timestamp_xfer_ms, OP_EQ, 0);
tt_u64_op(chan->timestamp_active, OP_EQ, 0);
tt_u64_op(chan->timestamp_recv, OP_EQ, 0);
/* Receive a variable-size cell */
var_cell = tor_malloc_zero(sizeof(var_cell_t) + CELL_PAYLOAD_SIZE);
make_fake_var_cell(var_cell);
old_count = test_chan_var_cells_recved;
tor_free(cell);
tt_int_op(test_chan_var_cells_recved, OP_EQ, old_count + 1);
/* Setup incoming cell handlers. We don't care about var cell, the channel
* layers is not handling those. */
channel_set_cell_handlers(chan, chan_test_cell_handler, NULL);
tt_ptr_op(chan->cell_handler, OP_EQ, chan_test_cell_handler);
/* Now process the cell, we should see it. */
old_count = test_chan_fixed_cells_recved;
channel_process_cell(chan, cell);
tt_int_op(test_chan_fixed_cells_recved, OP_EQ, old_count + 1);
/* We should have a series of timestamp set. */
tt_u64_op(chan->timestamp_xfer_ms, OP_NE, 0);
tt_u64_op(chan->timestamp_active, OP_NE, 0);
tt_u64_op(chan->timestamp_recv, OP_NE, 0);
tt_u64_op(chan->next_padding_time_ms, OP_EQ, 0);
tt_u64_op(chan->n_cells_recved, OP_EQ, 1);
tt_u64_op(chan->n_bytes_recved, OP_EQ, get_cell_network_size(0));
/* Close it */
channel_mark_for_close(ch);
tt_int_op(ch->state, OP_EQ, CHANNEL_STATE_CLOSING);
chan_test_finish_close(ch);
tt_int_op(ch->state, OP_EQ, CHANNEL_STATE_CLOSED);
old_count = test_close_called;
channel_mark_for_close(chan);
tt_int_op(chan->state, OP_EQ, CHANNEL_STATE_CLOSING);
tt_int_op(chan->reason_for_closing, OP_EQ, CHANNEL_CLOSE_REQUESTED);
tt_int_op(test_close_called, OP_EQ, old_count + 1);
/* This closes the channe so it calls in the scheduler, make sure of it. */
old_count = test_releases_count;
chan_test_finish_close(chan);
tt_int_op(test_releases_count, OP_EQ, old_count + 1);
tt_int_op(chan->state, OP_EQ, CHANNEL_STATE_CLOSED);
/* The channel will be free, lets make sure it is not accessible. */
uint64_t chan_id = chan->global_identifier;
tt_ptr_op(channel_find_by_global_id(chan_id), OP_EQ, chan);
channel_run_cleanup();
ch = NULL;
chan = channel_find_by_global_id(chan_id);
tt_assert(chan == NULL);
done:
free_fake_channel(ch);
tor_free(cell);
tor_free(var_cell);
UNMOCK(scheduler_channel_doesnt_want_writes);
UNMOCK(scheduler_release_channel);
return;
}
/**
@ -1002,11 +1014,18 @@ test_channel_id_map(void *arg)
}
struct testcase_t channel_tests[] = {
{ "dumpstats", test_channel_dumpstats, TT_FORK, NULL, NULL },
{ "incoming", test_channel_incoming, TT_FORK, NULL, NULL },
{ "lifecycle", test_channel_lifecycle, TT_FORK, NULL, NULL },
{ "lifecycle_2", test_channel_lifecycle_2, TT_FORK, NULL, NULL },
{ "id_map", test_channel_id_map, TT_FORK, NULL, NULL },
{ "inbound_cell", test_channel_inbound_cell, TT_FORK,
NULL, NULL },
{ "id_map", test_channel_id_map, TT_FORK,
NULL, NULL },
/* NOT WORKING TEST. */
{ "dumpstats", test_channel_dumpstats, TT_FORK,
NULL, NULL },
{ "lifecycle", test_channel_lifecycle, TT_FORK,
NULL, NULL },
{ "lifecycle_2", test_channel_lifecycle_2, TT_FORK,
NULL, NULL },
END_OF_TESTCASES
};