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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vnet/tcp/tcp.h>
#define TCP_TEST_I(_cond, _comment, _args...) \
({ \
int _evald = (_cond); \
if (!(_evald)) { \
fformat(stderr, "FAIL:%d: " _comment "\n", \
__LINE__, ##_args); \
} else { \
fformat(stderr, "PASS:%d: " _comment "\n", \
__LINE__, ##_args); \
} \
_evald; \
})
#define TCP_TEST(_cond, _comment, _args...) \
{ \
if (!TCP_TEST_I(_cond, _comment, ##_args)) { \
return 1; \
} \
}
static int
tcp_test_sack ()
{
tcp_connection_t _tc, *tc = &_tc;
sack_scoreboard_t *sb = &tc->sack_sb;
sack_block_t *sacks = 0, block;
sack_scoreboard_hole_t *hole;
int i;
memset (tc, 0, sizeof (*tc));
tc->snd_una = 0;
tc->snd_una_max = 1000;
tc->snd_nxt = 1000;
tc->opt.flags |= TCP_OPTS_FLAG_SACK;
scoreboard_init (&tc->sack_sb);
for (i = 0; i < 1000 / 100; i++)
{
block.start = i * 100;
block.end = (i + 1) * 100;
vec_add1 (sacks, block);
}
/*
* Inject even blocks
*/
for (i = 0; i < 1000 / 200; i++)
{
vec_add1 (tc->opt.sacks, sacks[i * 2]);
}
tc->opt.n_sack_blocks = vec_len (tc->opt.sacks);
tcp_rcv_sacks (tc, 0);
TCP_TEST ((pool_elts (sb->holes) == 5),
"scoreboard has %d elements", pool_elts (sb->holes));
/* First SACK block should be rejected */
hole = scoreboard_first_hole (sb);
TCP_TEST ((hole->start == 0 && hole->end == 200),
"first hole start %u end %u", hole->start, hole->end);
hole = scoreboard_last_hole (sb);
TCP_TEST ((hole->start == 900 && hole->end == 1000),
"last hole start %u end %u", hole->start, hole->end);
TCP_TEST ((sb->sacked_bytes == 400), "sacked bytes %d", sb->sacked_bytes);
TCP_TEST ((sb->snd_una_adv == 0), "snd_una_adv %u", sb->snd_una_adv);
TCP_TEST ((sb->last_sacked_bytes == 400),
"last sacked bytes %d", sb->last_sacked_bytes);
/*
* Inject odd blocks
*/
vec_reset_length (tc->opt.sacks);
for (i = 0; i < 1000 / 200; i++)
{
vec_add1 (tc->opt.sacks, sacks[i * 2 + 1]);
}
tc->opt.n_sack_blocks = vec_len (tc->opt.sacks);
tcp_rcv_sacks (tc, 0);
hole = scoreboard_first_hole (sb);
TCP_TEST ((pool_elts (sb->holes) == 1),
"scoreboard has %d holes", pool_elts (sb->holes));
TCP_TEST ((hole->start == 0 && hole->end == 100),
"first hole start %u end %u", hole->start, hole->end);
TCP_TEST ((sb->sacked_bytes == 900), "sacked bytes %d", sb->sacked_bytes);
TCP_TEST ((sb->snd_una_adv == 0), "snd_una_adv %u", sb->snd_una_adv);
TCP_TEST ((sb->max_byte_sacked == 1000),
"max sacked byte %u", sb->max_byte_sacked);
TCP_TEST ((sb->last_sacked_bytes == 500),
"last sacked bytes %d", sb->last_sacked_bytes);
/*
* Ack until byte 100, all bytes are now acked + sacked
*/
tcp_rcv_sacks (tc, 100);
TCP_TEST ((pool_elts (sb->holes) == 0),
"scoreboard has %d elements", pool_elts (sb->holes));
TCP_TEST ((sb->snd_una_adv == 900),
"snd_una_adv after ack %u", sb->snd_una_adv);
TCP_TEST ((sb->max_byte_sacked == 1000),
"max sacked byte %u", sb->max_byte_sacked);
TCP_TEST ((sb->sacked_bytes == 0), "sacked bytes %d", sb->sacked_bytes);
TCP_TEST ((sb->last_sacked_bytes == 0),
"last sacked bytes %d", sb->last_sacked_bytes);
/*
* Add new block
*/
vec_reset_length (tc->opt.sacks);
block.start = 1200;
block.end = 1300;
vec_add1 (tc->opt.sacks, block);
tc->snd_una_max = 1500;
tc->snd_una = 1000;
tc->snd_nxt = 1500;
tcp_rcv_sacks (tc, 1000);
TCP_TEST ((sb->snd_una_adv == 0),
"snd_una_adv after ack %u", sb->snd_una_adv);
TCP_TEST ((pool_elts (sb->holes) == 2),
"scoreboard has %d holes", pool_elts (sb->holes));
hole = scoreboard_first_hole (sb);
TCP_TEST ((hole->start == 1000 && hole->end == 1200),
"first hole start %u end %u", hole->start, hole->end);
hole = scoreboard_last_hole (sb);
TCP_TEST ((hole->start == 1300 && hole->end == 1500),
"last hole start %u end %u", hole->start, hole->end);
TCP_TEST ((sb->sacked_bytes == 100), "sacked bytes %d", sb->sacked_bytes);
/*
* Ack first hole
*/
vec_reset_length (tc->opt.sacks);
tcp_rcv_sacks (tc, 1200);
TCP_TEST ((sb->snd_una_adv == 100),
"snd_una_adv after ack %u", sb->snd_una_adv);
TCP_TEST ((sb->sacked_bytes == 0), "sacked bytes %d", sb->sacked_bytes);
TCP_TEST ((pool_elts (sb->holes) == 1),
"scoreboard has %d elements", pool_elts (sb->holes));
/*
* Remove all
*/
scoreboard_clear (sb);
TCP_TEST ((pool_elts (sb->holes) == 0),
"number of holes %d", pool_elts (sb->holes));
return 0;
}
static clib_error_t *
tcp_test (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd_arg)
{
int res = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "sack"))
{
res = tcp_test_sack ();
}
else
{
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
}
}
if (res)
{
return clib_error_return (0, "TCP unit test failed");
}
else
{
return 0;
}
}
VLIB_CLI_COMMAND (tcp_test_command, static) =
{
.path = "test tcp",.short_help = "internal tcp unit tests",.function =
tcp_test,};
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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