Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1 | /* |
Florin Coras | c5df8c7 | 2019-04-08 07:42:30 -0700 | [diff] [blame] | 2 | * Copyright (c) 2015-2019 Cisco and/or its affiliates. |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 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 | * ip/udp_format.c: udp 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 | |
| 42 | /* Format UDP header. */ |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 43 | u8 * |
| 44 | format_udp_header (u8 * s, va_list * args) |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 45 | { |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 46 | udp_header_t *udp = va_arg (*args, udp_header_t *); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 47 | u32 max_header_bytes = va_arg (*args, u32); |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame] | 48 | u32 indent; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 49 | u32 header_bytes = sizeof (udp[0]); |
| 50 | |
| 51 | /* Nothing to do. */ |
| 52 | if (max_header_bytes < sizeof (udp[0])) |
| 53 | return format (s, "UDP header truncated"); |
| 54 | |
| 55 | indent = format_get_indent (s); |
| 56 | indent += 2; |
| 57 | |
| 58 | s = format (s, "UDP: %d -> %d", |
| 59 | clib_net_to_host_u16 (udp->src_port), |
| 60 | clib_net_to_host_u16 (udp->dst_port)); |
| 61 | |
| 62 | s = format (s, "\n%Ulength %d, checksum 0x%04x", |
| 63 | format_white_space, indent, |
| 64 | clib_net_to_host_u16 (udp->length), |
| 65 | clib_net_to_host_u16 (udp->checksum)); |
| 66 | |
| 67 | /* Recurse into next protocol layer. */ |
| 68 | if (max_header_bytes != 0 && header_bytes < max_header_bytes) |
| 69 | { |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 70 | ip_main_t *im = &ip_main; |
| 71 | tcp_udp_port_info_t *pi; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 72 | |
| 73 | pi = ip_get_tcp_udp_port_info (im, udp->dst_port); |
| 74 | |
| 75 | if (pi && pi->format_header) |
| 76 | s = format (s, "\n%U%U", |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 77 | format_white_space, indent - 2, pi->format_header, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 78 | /* next protocol header */ (udp + 1), |
| 79 | max_header_bytes - sizeof (udp[0])); |
| 80 | } |
| 81 | |
| 82 | return s; |
| 83 | } |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 84 | |
| 85 | /* |
| 86 | * fd.io coding-style-patch-verification: ON |
| 87 | * |
| 88 | * Local Variables: |
| 89 | * eval: (c-set-style "gnu") |
| 90 | * End: |
| 91 | */ |