blob: 4de9923593460541992179bfc960cbcc053e470f [file] [log] [blame]
Dave Barach68b0fb02017-02-28 15:15:56 -05001/*
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 Barach1f75cfd2017-04-14 16:46:44 -040043u8 *
Dave Barach68b0fb02017-02-28 15:15:56 -050044format_tcp_flags (u8 * s, va_list * args)
45{
46 int flags = va_arg (*args, int);
47
Dave Barach63681512017-04-20 17:50:39 -040048 s = format (s, "0x%02x", flags);
49#define _(f) if (flags & TCP_FLAG_##f) s = format (s, " %s", #f);
Dave Barach68b0fb02017-02-28 15:15:56 -050050 foreach_tcp_flag
51#undef _
52 return s;
53}
54
55/* Format TCP header. */
56u8 *
57format_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 Coras45d34962017-04-25 00:05:27 -0700131u8 *
132format_tcp_sacks (u8 * s, va_list * args)
133{
Florin Corasc28764f2017-04-26 00:08:42 -0700134 tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
135 sack_block_t *sacks = tc->snd_sacks;
Florin Coras45d34962017-04-25 00:05:27 -0700136 sack_block_t *block;
137 vec_foreach (block, sacks)
138 {
Florin Corasc28764f2017-04-26 00:08:42 -0700139 s = format (s, " start %u end %u\n", block->start - tc->irs,
140 block->end - tc->irs);
Florin Coras45d34962017-04-25 00:05:27 -0700141 }
142 return s;
143}
144
Dave Barach68b0fb02017-02-28 15:15:56 -0500145/*
146 * fd.io coding-style-patch-verification: ON
147 *
148 * Local Variables:
149 * eval: (c-set-style "gnu")
150 * End:
151 */