Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015 Cisco and/or its affiliates. |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | /* |
| 16 | * tcp/tcp_format.c: tcp formatting |
| 17 | * |
| 18 | * Copyright (c) 2008 Eliot Dresselhaus |
| 19 | * |
| 20 | * Permission is hereby granted, free of charge, to any person obtaining |
| 21 | * a copy of this software and associated documentation files (the |
| 22 | * "Software"), to deal in the Software without restriction, including |
| 23 | * without limitation the rights to use, copy, modify, merge, publish, |
| 24 | * distribute, sublicense, and/or sell copies of the Software, and to |
| 25 | * permit persons to whom the Software is furnished to do so, subject to |
| 26 | * the following conditions: |
| 27 | * |
| 28 | * The above copyright notice and this permission notice shall be |
| 29 | * included in all copies or substantial portions of the Software. |
| 30 | * |
| 31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 32 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 33 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 34 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| 35 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| 36 | * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| 37 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 38 | */ |
| 39 | |
| 40 | #include <vnet/ip/ip.h> |
| 41 | #include <vnet/tcp/tcp.h> |
| 42 | |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 43 | u8 * |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 44 | format_tcp_flags (u8 * s, va_list * args) |
| 45 | { |
| 46 | int flags = va_arg (*args, int); |
| 47 | |
Dave Barach | 6368151 | 2017-04-20 17:50:39 -0400 | [diff] [blame] | 48 | s = format (s, "0x%02x", flags); |
| 49 | #define _(f) if (flags & TCP_FLAG_##f) s = format (s, " %s", #f); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 50 | foreach_tcp_flag |
| 51 | #undef _ |
| 52 | return s; |
| 53 | } |
| 54 | |
| 55 | /* Format TCP header. */ |
| 56 | u8 * |
| 57 | format_tcp_header (u8 * s, va_list * args) |
| 58 | { |
| 59 | tcp_header_t *tcp = va_arg (*args, tcp_header_t *); |
| 60 | u32 max_header_bytes = va_arg (*args, u32); |
| 61 | u32 header_bytes; |
| 62 | uword indent; |
| 63 | |
| 64 | /* Nothing to do. */ |
| 65 | if (max_header_bytes < sizeof (tcp[0])) |
| 66 | return format (s, "TCP header truncated"); |
| 67 | |
| 68 | indent = format_get_indent (s); |
| 69 | indent += 2; |
| 70 | header_bytes = tcp_header_bytes (tcp); |
| 71 | |
| 72 | s = format (s, "TCP: %d -> %d", clib_net_to_host_u16 (tcp->src), |
| 73 | clib_net_to_host_u16 (tcp->dst)); |
| 74 | |
| 75 | s = format (s, "\n%Useq. 0x%08x ack 0x%08x", format_white_space, indent, |
| 76 | clib_net_to_host_u32 (tcp->seq_number), |
| 77 | clib_net_to_host_u32 (tcp->ack_number)); |
| 78 | |
| 79 | s = format (s, "\n%Uflags %U, tcp header: %d bytes", format_white_space, |
| 80 | indent, format_tcp_flags, tcp->flags, header_bytes); |
| 81 | |
| 82 | s = format (s, "\n%Uwindow %d, checksum 0x%04x", format_white_space, indent, |
| 83 | clib_net_to_host_u16 (tcp->window), |
| 84 | clib_net_to_host_u16 (tcp->checksum)); |
| 85 | |
| 86 | |
| 87 | #if 0 |
| 88 | /* Format TCP options. */ |
| 89 | { |
| 90 | u8 *o; |
| 91 | u8 *option_start = (void *) (tcp + 1); |
| 92 | u8 *option_end = (void *) tcp + header_bytes; |
| 93 | |
| 94 | for (o = option_start; o < option_end;) |
| 95 | { |
| 96 | u32 length = o[1]; |
| 97 | switch (o[0]) |
| 98 | { |
| 99 | case TCP_OPTION_END: |
| 100 | length = 1; |
| 101 | o = option_end; |
| 102 | break; |
| 103 | |
| 104 | case TCP_OPTION_NOOP: |
| 105 | length = 1; |
| 106 | break; |
| 107 | |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | #endif |
| 112 | |
| 113 | /* Recurse into next protocol layer. */ |
| 114 | if (max_header_bytes != 0 && header_bytes < max_header_bytes) |
| 115 | { |
| 116 | ip_main_t *im = &ip_main; |
| 117 | tcp_udp_port_info_t *pi; |
| 118 | |
| 119 | pi = ip_get_tcp_udp_port_info (im, tcp->dst); |
| 120 | |
| 121 | if (pi && pi->format_header) |
| 122 | s = format (s, "\n%U%U", format_white_space, indent - 2, |
| 123 | pi->format_header, |
| 124 | /* next protocol header */ (void *) tcp + header_bytes, |
| 125 | max_header_bytes - header_bytes); |
| 126 | } |
| 127 | |
| 128 | return s; |
| 129 | } |
| 130 | |
Florin Coras | 45d3496 | 2017-04-25 00:05:27 -0700 | [diff] [blame] | 131 | u8 * |
| 132 | format_tcp_sacks (u8 * s, va_list * args) |
| 133 | { |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 134 | tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); |
| 135 | sack_block_t *sacks = tc->snd_sacks; |
Florin Coras | 45d3496 | 2017-04-25 00:05:27 -0700 | [diff] [blame] | 136 | sack_block_t *block; |
| 137 | vec_foreach (block, sacks) |
| 138 | { |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 139 | s = format (s, " start %u end %u\n", block->start - tc->irs, |
| 140 | block->end - tc->irs); |
Florin Coras | 45d3496 | 2017-04-25 00:05:27 -0700 | [diff] [blame] | 141 | } |
| 142 | return s; |
| 143 | } |
| 144 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 145 | /* |
| 146 | * fd.io coding-style-patch-verification: ON |
| 147 | * |
| 148 | * Local Variables: |
| 149 | * eval: (c-set-style "gnu") |
| 150 | * End: |
| 151 | */ |