Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 1 | /*--------------------------------------------------------------------------- |
| 2 | * Copyright (c) 2009-2014 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 | /* |
| 17 | * IPv4 and IPv6 Fragmentation Nodes |
| 18 | * |
| 19 | * A packet sent to those nodes require the following |
| 20 | * buffer attributes to be set: |
| 21 | * ip_frag.header_offset : |
| 22 | * Where to find the IPv4 (or IPv6) header in the packet. Previous |
| 23 | * bytes are left untouched and copied in every fragment. The fragments |
| 24 | * are then appended. This option is used for fragmented packets |
| 25 | * that are encapsulated. |
| 26 | * ip_frag.mtu : |
| 27 | * Maximum size of IP packets, header included, but ignoring |
| 28 | * the 'ip_frag.header_offset' copied bytes. |
| 29 | * ip_frag.next_index : |
| 30 | * One of ip_frag_next_t, indicating to which exit node the fragments |
| 31 | * should be sent to. |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | #ifndef IP_FRAG_H |
| 36 | #define IP_FRAG_H |
| 37 | |
| 38 | #include <vnet/vnet.h> |
| 39 | |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 40 | #define IP_FRAG_FLAG_IP4_HEADER 0x01 //Encapsulating IPv4 header |
| 41 | #define IP_FRAG_FLAG_IP6_HEADER 0x02 //Encapsulating IPv6 header |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 42 | |
| 43 | #define IP4_FRAG_NODE_NAME "ip4-frag" |
| 44 | #define IP6_FRAG_NODE_NAME "ip6-frag" |
| 45 | |
Damjan Marion | b8abf87 | 2016-03-14 20:02:35 +0100 | [diff] [blame] | 46 | extern vlib_node_registration_t ip4_frag_node; |
| 47 | extern vlib_node_registration_t ip6_frag_node; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 48 | |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 49 | typedef enum |
| 50 | { |
Ole Troan | b3655e5 | 2018-08-16 22:08:49 +0200 | [diff] [blame] | 51 | IP4_FRAG_NEXT_IP4_REWRITE, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 52 | IP4_FRAG_NEXT_IP4_LOOKUP, |
| 53 | IP4_FRAG_NEXT_IP6_LOOKUP, |
Ole Troan | 9fb8755 | 2016-01-13 22:30:43 +0100 | [diff] [blame] | 54 | IP4_FRAG_NEXT_ICMP_ERROR, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 55 | IP4_FRAG_NEXT_DROP, |
| 56 | IP4_FRAG_N_NEXT |
| 57 | } ip4_frag_next_t; |
| 58 | |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 59 | typedef enum |
| 60 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 61 | IP6_FRAG_NEXT_IP4_LOOKUP, |
| 62 | IP6_FRAG_NEXT_IP6_LOOKUP, |
Ole Troan | b3655e5 | 2018-08-16 22:08:49 +0200 | [diff] [blame] | 63 | IP6_FRAG_NEXT_IP6_REWRITE, |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 64 | IP6_FRAG_NEXT_DROP, |
| 65 | IP6_FRAG_N_NEXT |
| 66 | } ip6_frag_next_t; |
| 67 | |
| 68 | #define foreach_ip_frag_error \ |
| 69 | /* Must be first. */ \ |
| 70 | _(NONE, "packet fragmented") \ |
| 71 | _(SMALL_PACKET, "packet smaller than MTU") \ |
| 72 | _(FRAGMENT_SENT, "number of sent fragments") \ |
Ole Troan | 9fb8755 | 2016-01-13 22:30:43 +0100 | [diff] [blame] | 73 | _(CANT_FRAGMENT_HEADER, "can't fragment header") \ |
| 74 | _(DONT_FRAGMENT_SET, "can't fragment this packet") \ |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 75 | _(MALFORMED, "malformed packet") \ |
| 76 | _(MEMORY, "could not allocate buffer") \ |
| 77 | _(UNKNOWN, "unknown error") |
| 78 | |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 79 | typedef enum |
| 80 | { |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 81 | #define _(sym,str) IP_FRAG_ERROR_##sym, |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 82 | foreach_ip_frag_error |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 83 | #undef _ |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 84 | IP_FRAG_N_ERROR, |
| 85 | } ip_frag_error_t; |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 86 | |
Ole Troan | 282093f | 2018-09-19 12:38:51 +0200 | [diff] [blame^] | 87 | void ip_frag_set_vnet_buffer (vlib_buffer_t * b, u16 mtu, |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 88 | u8 next_index, u8 flags); |
Vijayabhaskar Katamreddy | e95d1a1 | 2018-06-28 11:08:29 -0700 | [diff] [blame] | 89 | void |
| 90 | ip4_frag_do_fragment (vlib_main_t * vm, u32 pi, u32 ** buffer, |
| 91 | ip_frag_error_t * error); |
| 92 | void |
| 93 | ip6_frag_do_fragment (vlib_main_t * vm, u32 pi, u32 ** buffer, |
| 94 | ip_frag_error_t * error); |
Ed Warnicke | cb9cada | 2015-12-08 15:45:58 -0700 | [diff] [blame] | 95 | #endif /* ifndef IP_FRAG_H */ |
Dave Barach | d7cb1b5 | 2016-12-09 09:52:16 -0500 | [diff] [blame] | 96 | |
| 97 | /* |
| 98 | * fd.io coding-style-patch-verification: ON |
| 99 | * |
| 100 | * Local Variables: |
| 101 | * eval: (c-set-style "gnu") |
| 102 | * End: |
| 103 | */ |