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/ip.h: ip generic (4 or 6) main
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 #ifndef included_ip_main_h
41 #define included_ip_main_h
43 #include <vppinfra/hash.h>
44 #include <vppinfra/heap.h> /* adjacency heap */
45 #include <vppinfra/ptclosure.h>
47 #include <vnet/vnet.h>
49 #include <vnet/ip/ip_types.h>
50 #include <vnet/ip/format.h>
51 #include <vnet/ip/ip_packet.h>
52 #include <vnet/ip/lookup.h>
53 #include <vnet/ip/ip_interface.h>
55 #include <vnet/tcp/tcp_packet.h>
56 #include <vnet/udp/udp_packet.h>
57 #include <vnet/ip/icmp46_packet.h>
59 #include <vnet/ip/ip4.h>
60 #include <vnet/ip/ip4_error.h>
61 #include <vnet/ip/ip4_packet.h>
62 #include <vnet/ip/icmp4.h>
64 #include <vnet/ip/ip6.h>
65 #include <vnet/ip/ip6_packet.h>
66 #include <vnet/ip/ip6_error.h>
67 #include <vnet/ip/icmp6.h>
69 /* Per protocol info. */
72 /* Protocol name (also used as hash key). */
75 /* Protocol number. */
76 ip_protocol_t protocol;
78 /* Format function for this IP protocol. */
79 format_function_t *format_header;
81 /* Parser for header. */
82 unformat_function_t *unformat_header;
84 /* Parser for per-protocol matches. */
85 unformat_function_t *unformat_match;
87 /* Parser for packet generator edits for this protocol. */
88 unformat_function_t *unformat_pg_edit;
91 /* Per TCP/UDP port info. */
94 /* Port name (used as hash key). */
97 /* UDP/TCP port number in network byte order. */
100 /* Port specific format function. */
101 format_function_t *format_header;
103 /* Parser for packet generator edits for this protocol. */
104 unformat_function_t *unformat_pg_edit;
105 } tcp_udp_port_info_t;
109 /* Per IP protocol info. */
110 ip_protocol_info_t *protocol_infos;
112 /* Protocol info index hashed by 8 bit IP protocol. */
113 uword *protocol_info_by_protocol;
115 /* Hash table mapping IP protocol name (see protocols.def)
116 to protocol number. */
117 uword *protocol_info_by_name;
119 /* Per TCP/UDP port info. */
120 tcp_udp_port_info_t *port_infos;
122 /* Hash table from network-byte-order port to port info index. */
123 uword *port_info_by_port;
125 /* Hash table mapping TCP/UDP name to port info index. */
126 uword *port_info_by_name;
129 extern ip_main_t ip_main;
131 clib_error_t *ip_main_init (vlib_main_t * vm);
133 static inline ip_protocol_info_t *
134 ip_get_protocol_info (ip_main_t * im, u32 protocol)
138 p = hash_get (im->protocol_info_by_protocol, protocol);
139 return p ? vec_elt_at_index (im->protocol_infos, p[0]) : 0;
142 static inline tcp_udp_port_info_t *
143 ip_get_tcp_udp_port_info (ip_main_t * im, u32 port)
147 p = hash_get (im->port_info_by_port, port);
148 return p ? vec_elt_at_index (im->port_infos, p[0]) : 0;
151 always_inline ip_csum_t
152 ip_incremental_checksum_buffer (vlib_main_t * vm,
153 vlib_buffer_t * first_buffer,
154 u32 first_buffer_offset,
155 u32 n_bytes_to_checksum, ip_csum_t sum)
157 vlib_buffer_t *b = first_buffer;
158 u32 n_bytes_left = n_bytes_to_checksum;
159 ASSERT (b->current_length >= first_buffer_offset);
163 n = clib_min (n_bytes_left, b->current_length - first_buffer_offset);
164 h = vlib_buffer_get_current (b) + first_buffer_offset;
165 sum = ip_incremental_checksum (sum, h, n);
166 if (PREDICT_FALSE (b->flags & VLIB_BUFFER_NEXT_PRESENT))
171 if (n_bytes_left == 0)
173 b = vlib_get_buffer (vm, b->next_buffer);
174 n = clib_min (n_bytes_left, b->current_length);
175 h = vlib_buffer_get_current (b);
176 sum = ip_incremental_checksum (sum, h, n);
184 ip_calculate_l4_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
185 ip_csum_t sum0, u32 payload_length,
186 u8 * iph, u32 ip_header_size, u8 * l4h)
189 u8 *data_this_buffer, length_odd;
190 u32 n_bytes_left, n_this_buffer, n_ip_bytes_this_buffer;
192 n_bytes_left = payload_length;
194 if (l4h) /* packet l4 header and no buffer chain involved */
197 n_this_buffer = payload_length;
198 data_this_buffer = l4h;
203 if (iph) /* ip header pointer set to packet in buffer */
205 ASSERT (ip_header_size);
206 n_this_buffer = payload_length;
207 data_this_buffer = iph + ip_header_size; /* at l4 header */
208 n_ip_bytes_this_buffer =
209 p0->current_length - (((u8 *) iph - p0->data) - p0->current_data);
210 if (PREDICT_FALSE (payload_length + ip_header_size >
211 n_ip_bytes_this_buffer))
213 n_this_buffer = n_ip_bytes_this_buffer - ip_header_size;
214 if (PREDICT_FALSE (n_this_buffer >> 31))
215 { /* error - ip header don't fit this buffer */
220 else /* packet in buffer with no ip header */
221 { /* buffer current pointer at l4 header */
222 n_this_buffer = p0->current_length;
223 data_this_buffer = vlib_buffer_get_current (p0);
225 n_this_buffer = clib_min (n_this_buffer, n_bytes_left);
230 sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
231 n_bytes_left -= n_this_buffer;
232 if (n_bytes_left == 0)
235 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
240 length_odd = (n_this_buffer & 1);
242 p0 = vlib_get_buffer (vm, p0->next_buffer);
243 data_this_buffer = vlib_buffer_get_current (p0);
244 n_this_buffer = clib_min (p0->current_length, n_bytes_left);
246 if (PREDICT_FALSE (length_odd))
248 /* Prepend a 0 byte to maintain 2-byte checksum alignment */
252 data_this_buffer[0] = 0;
256 sum16 = ~ip_csum_fold (sum0);
260 void ip_del_all_interface_addresses (vlib_main_t * vm, u32 sw_if_index);
262 extern vlib_node_registration_t ip4_inacl_node;
263 extern vlib_node_registration_t ip6_inacl_node;
265 void ip_table_create (fib_protocol_t fproto, u32 table_id, u8 is_api,
268 void ip_table_delete (fib_protocol_t fproto, u32 table_id, u8 is_api);
270 int ip_table_bind (fib_protocol_t fproto, u32 sw_if_index,
271 u32 table_id, u8 is_api);
273 u8 ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4);
274 u8 ip_is_local_host (ip46_address_t * ip46_address, u8 is_ip4);
275 u8 ip4_is_local_host (ip4_address_t * ip4_address);
276 u8 ip6_is_local_host (ip6_address_t * ip6_address);
277 u8 ip_is_local (u32 fib_index, ip46_address_t * ip46_address, u8 is_ip4);
278 void ip_copy (ip46_address_t * dst, ip46_address_t * src, u8 is_ip4);
279 void ip_set (ip46_address_t * dst, void *src, u8 is_ip4);
281 always_inline u32 vlib_buffer_get_ip4_fib_index (vlib_buffer_t * b);
282 always_inline u32 vlib_buffer_get_ip6_fib_index (vlib_buffer_t * b);
284 vlib_buffer_get_ip_fib_index (vlib_buffer_t * b, u8 is_ip4)
286 return (is_ip4 ? vlib_buffer_get_ip4_fib_index
287 : vlib_buffer_get_ip6_fib_index) (b);
290 #endif /* included_ip_main_h */
293 * fd.io coding-style-patch-verification: ON
296 * eval: (c-set-style "gnu")