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authorFlorin Coras <fcoras@cisco.com>2020-07-02 09:44:21 -0700
committerDave Barach <openvpp@barachs.net>2020-07-02 19:13:32 +0000
commit3e9ff291da7e76bfa2fe6a15a7842edb9933f8b8 (patch)
treea8afc9dd7df82d3e97580855786d91b3fa3ee3ac
parent39008ca19ea46922541f80fdafd713e198fce8c6 (diff)
tcp: cli to dump half-open connections
Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Idf7e483de0afc95a7579145fb16689e1853b10f9
-rw-r--r--src/vnet/tcp/tcp_cli.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/vnet/tcp/tcp_cli.c b/src/vnet/tcp/tcp_cli.c
index 02cbdde7222..ada2ac0b4d5 100644
--- a/src/vnet/tcp/tcp_cli.c
+++ b/src/vnet/tcp/tcp_cli.c
@@ -897,6 +897,110 @@ VLIB_CLI_COMMAND (clear_tcp_stats_command, static) =
};
/* *INDENT-ON* */
+static void
+tcp_show_half_open (vlib_main_t * vm, u32 start, u32 end, u8 verbose)
+{
+ tcp_main_t *tm = &tcp_main;
+ u8 output_suppressed = 0;
+ u32 n_elts, count = 0;
+ tcp_connection_t *tc;
+ int max_index, i;
+
+ n_elts = pool_elts (tm->half_open_connections);
+ max_index = pool_len (tm->half_open_connections) - 1;
+ if (verbose && end == ~0 && n_elts > 50)
+ {
+ vlib_cli_output (vm, "Too many connections, use range <start> <end>");
+ return;
+ }
+
+ if (!verbose)
+ {
+ vlib_cli_output (vm, "%u tcp half-open connections", n_elts);
+ return;
+ }
+
+ for (i = start; i <= clib_min (end, max_index); i++)
+ {
+ if (pool_is_free_index (tm->half_open_connections, i))
+ continue;
+
+ tc = pool_elt_at_index (tm->half_open_connections, i);
+
+ count += 1;
+ if (verbose)
+ {
+ if (count > 50 || (verbose > 1 && count > 10))
+ {
+ output_suppressed = 1;
+ continue;
+ }
+ }
+ vlib_cli_output (vm, "%U", format_tcp_connection, tc, verbose);
+ }
+ if (!output_suppressed)
+ vlib_cli_output (vm, "%u tcp half-open connections", n_elts);
+ else
+ vlib_cli_output (vm, "%u tcp half-open connections matched. Output "
+ "suppressed. Use finer grained filter.", count);
+
+}
+
+static clib_error_t *
+show_tcp_half_open_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 start, end = ~0, verbose = 0;
+ clib_error_t *error = 0;
+
+ session_cli_return_if_not_enabled ();
+
+ if (!unformat_user (input, unformat_line_input, line_input))
+ {
+ tcp_show_half_open (vm, 0, ~0, 0);
+ return 0;
+ }
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "range %u %u", &start, &end))
+ ;
+ else if (unformat (line_input, "verbose %d"), &verbose)
+ ;
+ else if (unformat (line_input, "verbose"))
+ verbose = 1;
+ else
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ goto done;
+ }
+ }
+
+ if (start > end)
+ {
+ error = clib_error_return (0, "invalid range start: %u end: %u", start,
+ end);
+ goto done;
+ }
+
+ tcp_show_half_open (vm, start, end, verbose);
+
+done:
+ unformat_free (line_input);
+ return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_tcp_half_open_command, static) =
+{
+ .path = "show tcp half-open",
+ .short_help = "show tcp half-open [verbose <n>] [range <start> <end>]",
+ .function = show_tcp_half_open_fn,
+};
+/* *INDENT-ON* */
+
uword
unformat_tcp_cc_algo (unformat_input_t * input, va_list * va)
{