From 067f8f963d64b1cbc70f2b78ebd2c6d3791e7d22 Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Sat, 4 Jan 2020 00:53:04 +0000 Subject: tcp: fix duplicate sack whith reneging Type: fix Signed-off-by: Florin Coras Change-Id: I6f7fb91e059996ff702eb9c36e3abaed237fe221 --- src/plugins/unittest/tcp_test.c | 110 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 99 insertions(+), 11 deletions(-) (limited to 'src/plugins') diff --git a/src/plugins/unittest/tcp_test.c b/src/plugins/unittest/tcp_test.c index dbdb5a977f6..5474f8dc511 100644 --- a/src/plugins/unittest/tcp_test.c +++ b/src/plugins/unittest/tcp_test.c @@ -85,6 +85,7 @@ tcp_test_sack_rx (vlib_main_t * vm, unformat_input_t * input) clib_memset (tc, 0, sizeof (*tc)); + tc->flags |= TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY; tc->snd_una = 0; tc->snd_una_max = 1000; tc->snd_nxt = 1000; @@ -132,11 +133,12 @@ tcp_test_sack_rx (vlib_main_t * vm, unformat_input_t * input) TCP_TEST ((sb->lost_bytes == 300), "lost bytes %u", sb->lost_bytes); /* - * Inject odd blocks + * Inject odd blocks except the last + * */ vec_reset_length (tc->rcv_opts.sacks); - for (i = 0; i < 1000 / 200; i++) + for (i = 0; i < 800 / 200; i++) { vec_add1 (tc->rcv_opts.sacks, sacks[i * 2 + 1]); } @@ -148,33 +150,120 @@ tcp_test_sack_rx (vlib_main_t * vm, unformat_input_t * input) sb, tc); hole = scoreboard_first_hole (sb); - TCP_TEST ((pool_elts (sb->holes) == 1), + TCP_TEST ((pool_elts (sb->holes) == 2), "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->sacked_bytes == 800), "sacked bytes %d", sb->sacked_bytes); TCP_TEST ((!sb->is_reneging), "is not reneging"); - TCP_TEST ((sb->high_sacked == 1000), "high sacked %u", sb->high_sacked); - TCP_TEST ((sb->last_sacked_bytes == 500), + TCP_TEST ((sb->high_sacked == 900), "high sacked %u", sb->high_sacked); + TCP_TEST ((sb->last_sacked_bytes == 400), "last sacked bytes %d", sb->last_sacked_bytes); TCP_TEST ((sb->lost_bytes == 100), "lost bytes %u", sb->lost_bytes); /* - * Ack until byte 100 - this is reneging because we should ack until 1000 + * Ack until byte 100 - this is reneging because we should ack until 900 */ tcp_rcv_sacks (tc, 100); if (verbose) vlib_cli_output (vm, "\nack until byte 100:\n%U", format_tcp_scoreboard, sb, tc); - TCP_TEST ((pool_elts (sb->holes) == 0), "scoreboard has %d elements", + TCP_TEST ((pool_elts (sb->holes) == 1), "scoreboard has %d elements", pool_elts (sb->holes)); TCP_TEST ((sb->is_reneging), "is reneging"); /* - * Sack all up to 1000 + * Make sure we accept duplicate acks while reneging. */ tc->snd_una = 100; + sb->high_rxt = 950; + + block.start = 900; + block.end = 950; + vec_add1 (tc->rcv_opts.sacks, block); + + tcp_rcv_sacks (tc, 100); + TCP_TEST ((pool_elts (sb->holes) == 1), "scoreboard has %d elements", + pool_elts (sb->holes)); + TCP_TEST ((sb->is_reneging), "is reneging"); + TCP_TEST ((sb->last_sacked_bytes == 50), "last sacked bytes %d", + sb->last_sacked_bytes); + TCP_TEST ((sb->rxt_sacked == 50), "last rxt sacked bytes %d", + sb->rxt_sacked); + + /* + * Sack all up to 950 + */ + tcp_rcv_sacks (tc, 950); + TCP_TEST ((sb->high_sacked == 950), "max sacked byte %u", sb->high_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); + TCP_TEST ((sb->lost_bytes == 0), "lost bytes %u", sb->lost_bytes); + TCP_TEST ((!sb->is_reneging), "is not reneging"); + + /* + * Sack [960 970] [980 990] + */ + sb->high_rxt = 985; + + tc->snd_una = 950; + vec_reset_length (tc->rcv_opts.sacks); + block.start = 960; + block.end = 970; + vec_add1 (tc->rcv_opts.sacks, block); + + block.start = 980; + block.end = 990; + vec_add1 (tc->rcv_opts.sacks, block); + + tcp_rcv_sacks (tc, 950); + TCP_TEST ((sb->high_sacked == 990), "max sacked byte %u", sb->high_sacked); + TCP_TEST ((sb->sacked_bytes == 20), "sacked bytes %d", sb->sacked_bytes); + TCP_TEST ((sb->last_sacked_bytes == 20), + "last sacked bytes %d", sb->last_sacked_bytes); + TCP_TEST ((sb->lost_bytes == 0), "lost bytes %u", sb->lost_bytes); + TCP_TEST ((!sb->is_reneging), "is not reneging"); + TCP_TEST ((sb->rxt_sacked == 15), "last rxt sacked bytes %d", + sb->rxt_sacked); + + /* + * Ack up to 960 (reneging) + [961 971] + */ + tc->rcv_opts.sacks[0].start = 961; + tc->rcv_opts.sacks[0].end = 971; + + tcp_rcv_sacks (tc, 960); + + TCP_TEST ((sb->is_reneging), "is reneging"); + TCP_TEST ((sb->sacked_bytes == 21), "sacked bytes %d", sb->sacked_bytes); + TCP_TEST ((sb->last_sacked_bytes == 1), + "last sacked bytes %d", sb->last_sacked_bytes); + TCP_TEST ((sb->rxt_sacked == 11), "last rxt sacked bytes %d", + sb->rxt_sacked); + TCP_TEST ((sb->last_bytes_delivered == 0), "last bytes delivered %d", + sb->last_bytes_delivered); + + /* + * Ack up to 960 (reneging) + [961 990] + */ + tc->snd_una = 960; + tc->rcv_opts.sacks[0].start = 961; + tc->rcv_opts.sacks[0].end = 990; + + tcp_rcv_sacks (tc, 960); + + TCP_TEST ((sb->is_reneging), "is reneging"); + TCP_TEST ((sb->sacked_bytes == 30), "sacked bytes %d", sb->sacked_bytes); + TCP_TEST ((sb->last_sacked_bytes == 9), + "last sacked bytes %d", sb->last_sacked_bytes); + TCP_TEST ((sb->rxt_sacked == 9), "last rxt sacked bytes %d", + sb->rxt_sacked); + + /* + * Sack all up to 1000 + */ tcp_rcv_sacks (tc, 1000); TCP_TEST ((sb->high_sacked == 1000), "max sacked byte %u", sb->high_sacked); TCP_TEST ((sb->sacked_bytes == 0), "sacked bytes %d", sb->sacked_bytes); @@ -183,11 +272,10 @@ tcp_test_sack_rx (vlib_main_t * vm, unformat_input_t * input) TCP_TEST ((sb->lost_bytes == 0), "lost bytes %u", sb->lost_bytes); TCP_TEST ((!sb->is_reneging), "is not reneging"); - /* * Add new block */ - + tc->flags = 0; vec_reset_length (tc->rcv_opts.sacks); block.start = 1200; -- cgit 1.2.3-korg