diff options
Diffstat (limited to 'src/vnet/tcp/tcp.c')
| -rw-r--r-- | src/vnet/tcp/tcp.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c index f379e699..8ed325d2 100644 --- a/src/vnet/tcp/tcp.c +++ b/src/vnet/tcp/tcp.c @@ -732,6 +732,7 @@ format_tcp_connection (u8 * s, va_list * args) if (verbose > 1) s = format (s, " %U\n%U", format_tcp_timers, tc, format_tcp_vars, tc); } + return s; } @@ -792,6 +793,30 @@ format_tcp_sacks (u8 * s, va_list * args) } u8 * +format_tcp_rcv_sacks (u8 * s, va_list * args) +{ + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + sack_block_t *sacks = tc->rcv_opts.sacks; + sack_block_t *block; + int i, len = 0; + + len = vec_len (sacks); + for (i = 0; i < len - 1; i++) + { + block = &sacks[i]; + s = format (s, " start %u end %u\n", block->start - tc->iss, + block->end - tc->iss); + } + if (len) + { + block = &sacks[len - 1]; + s = format (s, " start %u end %u", block->start - tc->iss, + block->end - tc->iss); + } + return s; +} + +u8 * format_tcp_sack_hole (u8 * s, va_list * args) { sack_scoreboard_hole_t *hole = va_arg (*args, sack_scoreboard_hole_t *); @@ -820,6 +845,7 @@ format_tcp_scoreboard (u8 * s, va_list * args) s = format (s, "%U", format_tcp_sack_hole, hole); hole = scoreboard_next_hole (sb, hole); } + return s; } @@ -1304,7 +1330,189 @@ VLIB_CLI_COMMAND (tcp_src_address_command, static) = }; /* *INDENT-ON* */ +static u8 * +tcp_scoreboard_dump_trace (u8 * s, sack_scoreboard_t * sb) +{ +#if TCP_SCOREBOARD_TRACE + + scoreboard_trace_elt_t *block; + int i = 0; + + if (!sb->trace) + return s; + + s = format (s, "scoreboard trace:"); + vec_foreach (block, sb->trace) + { + s = format (s, "{%u, %u, %u, %u, %u}, ", block->start, block->end, + block->ack, block->snd_una_max, block->group); + if ((++i % 3) == 0) + s = format (s, "\n"); + } + return s; +#else + return 0; +#endif +} + +static clib_error_t * +tcp_show_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd_arg) +{ + transport_connection_t *tconn = 0; + tcp_connection_t *tc; + u8 *s = 0; + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U", unformat_transport_connection, &tconn, + TRANSPORT_PROTO_TCP)) + ; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + + if (!TCP_SCOREBOARD_TRACE) + { + vlib_cli_output (vm, "scoreboard tracing not enabled"); + return 0; + } + + tc = tcp_get_connection_from_transport (tconn); + s = tcp_scoreboard_dump_trace (s, &tc->sack_sb); + vlib_cli_output (vm, "%v", s); + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command, static) = +{ + .path = "show tcp scoreboard trace", + .short_help = "show tcp scoreboard trace <connection>", + .function = tcp_show_scoreboard_trace_fn, +}; +/* *INDENT-ON* */ +u8 * +tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose) +{ + int i, trace_len; + scoreboard_trace_elt_t *trace; + u32 next_ack, left, group, has_new_ack = 0; + tcp_connection_t _dummy_tc, *dummy_tc = &_dummy_tc; + sack_block_t *block; + + if (!tc) + return s; + + memset (dummy_tc, 0, sizeof (*dummy_tc)); + tcp_connection_timers_init (dummy_tc); + scoreboard_init (&dummy_tc->sack_sb); + dummy_tc->rcv_opts.flags |= TCP_OPTS_FLAG_SACK; + +#if TCP_SCOREBOARD_TRACE + trace = tc->sack_sb.trace; + trace_len = vec_len (tc->sack_sb.trace); +#else + trace = 0; + trace_len = 0; +#endif + + for (i = 0; i < trace_len; i++) + { + if (trace[i].ack != 0) + { + dummy_tc->snd_una = trace[i].ack - 1448; + dummy_tc->snd_una_max = trace[i].ack; + } + } + + left = 0; + while (left < trace_len) + { + group = trace[left].group; + vec_reset_length (dummy_tc->rcv_opts.sacks); + has_new_ack = 0; + while (trace[left].group == group) + { + if (trace[left].ack != 0) + { + if (verbose) + s = format (s, "Adding ack %u, snd_una_max %u, segs: ", + trace[left].ack, trace[left].snd_una_max); + dummy_tc->snd_una_max = trace[left].snd_una_max; + next_ack = trace[left].ack; + has_new_ack = 1; + } + else + { + if (verbose) + s = format (s, "[%u, %u], ", trace[left].start, + trace[left].end); + vec_add2 (dummy_tc->rcv_opts.sacks, block, 1); + block->start = trace[left].start; + block->end = trace[left].end; + } + left++; + } + + /* Push segments */ + tcp_rcv_sacks (dummy_tc, next_ack); + if (has_new_ack) + dummy_tc->snd_una = next_ack + dummy_tc->sack_sb.snd_una_adv; + + if (verbose) + s = format (s, "result: %U", format_tcp_scoreboard, + &dummy_tc->sack_sb); + + } + s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb); + + return s; +} + +static clib_error_t * +tcp_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd_arg) +{ + transport_connection_t *tconn = 0; + tcp_connection_t *tc = 0; + u8 *str = 0; + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U", unformat_transport_connection, &tconn, + TRANSPORT_PROTO_TCP)) + ; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + + if (!TCP_SCOREBOARD_TRACE) + { + vlib_cli_output (vm, "scoreboard tracing not enabled"); + return 0; + } + + tc = tcp_get_connection_from_transport (tconn); + if (!tc) + { + vlib_cli_output (vm, "connection not found"); + return 0; + } + str = tcp_scoreboard_replay (str, tc, 1); + vlib_cli_output (vm, "%v", str); + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (tcp_replay_scoreboard_command, static) = +{ + .path = "tcp replay scoreboard", + .short_help = "tcp replay scoreboard <connection>", + .function = tcp_scoreboard_trace_fn, +}; +/* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON |