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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 * ip/tcp_format.c: tcp formatting
18 * Copyright (c) 2008 Eliot Dresselhaus
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:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
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.
40 #include <vnet/ip/ip.h>
42 static u8 * format_tcp_flags (u8 * s, va_list * args)
44 int flags = va_arg (*args, int);
46 #define _(f) if (flags & TCP_FLAG_##f) s = format (s, "%s, ", #f);
53 /* Format TCP header. */
54 u8 * format_tcp_header (u8 * s, va_list * args)
56 tcp_header_t * tcp = va_arg (*args, tcp_header_t *);
57 u32 max_header_bytes = va_arg (*args, u32);
62 if (max_header_bytes < sizeof (tcp[0]))
63 return format (s, "TCP header truncated");
65 indent = format_get_indent (s);
68 s = format (s, "TCP: %d -> %d",
69 clib_net_to_host_u16 (tcp->ports.src),
70 clib_net_to_host_u16 (tcp->ports.dst));
72 s = format (s, "\n%Useq. tx 0x%08x rx 0x%08x",
73 format_white_space, indent,
74 clib_net_to_host_u32 (tcp->seq_number),
75 clib_net_to_host_u32 (tcp->ack_number));
77 s = format (s, "\n%Uflags %U, tcp header: %d bytes",
78 format_white_space, indent,
79 format_tcp_flags, tcp->flags,
80 (tcp->tcp_header_u32s_and_reserved >> 4) * sizeof (u32));
82 s = format (s, "\n%Uwindow %d, checksum 0x%04x",
83 format_white_space, indent,
84 clib_net_to_host_u16 (tcp->window),
85 clib_net_to_host_u16 (tcp->checksum));
87 header_bytes = tcp_header_bytes (tcp);
89 /* Format TCP options. */
93 u8 * option_start = (void *) (tcp + 1);
94 u8 * option_end = (void *) tcp + header_bytes;
96 for (o = option_start; o < option_end; )
115 /* Recurse into next protocol layer. */
116 if (max_header_bytes != 0 && header_bytes < max_header_bytes)
118 ip_main_t * im = &ip_main;
119 tcp_udp_port_info_t * pi;
121 pi = ip_get_tcp_udp_port_info (im, tcp->ports.dst);
123 if (pi && pi->format_header)
124 s = format (s, "\n%U%U",
125 format_white_space, indent - 2,
127 /* next protocol header */ (void*) tcp + header_bytes,
128 max_header_bytes - header_bytes);