vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2016-04-12	Added a LICENSE file	Ed Warnicke	1	-0/+202

/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* * ip/ip.h: ip generic (4 or 6) main * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef included_ip_main_h #define included_ip_main_h #include <vppinfra/hash.h> #include <vppinfra/heap.h> /* adjacency heap */ #include <vppinfra/ptclosure.h> #include <vnet/vnet.h> #include <vnet/ip/ip_types.h> #include <vnet/ip/format.h> #include <vnet/ip/ip_packet.h> #include <vnet/ip/lookup.h> #include <vnet/ip/ip_interface.h> #include <vnet/tcp/tcp_packet.h> #include <vnet/udp/udp_packet.h> #include <vnet/ip/icmp46_packet.h> #include <vnet/ip/ip4.h> #include <vnet/ip/ip4_error.h> #include <vnet/ip/ip4_packet.h> #include <vnet/ip/icmp4.h> #include <vnet/ip/ip6.h> #include <vnet/ip/ip6_packet.h> #include <vnet/ip/ip6_error.h> #include <vnet/ip/icmp6.h> /* Per protocol info. */ typedef struct { /* Protocol name (also used as hash key). */ u8 *name; /* Protocol number. */ ip_protocol_t protocol; /* Format function for this IP protocol. */ format_function_t *format_header; /* Parser for header. */ unformat_function_t *unformat_header; /* Parser for per-protocol matches. */ unformat_function_t *unformat_match; /* Parser for packet generator edits for this protocol. */ unformat_function_t *unformat_pg_edit; } ip_protocol_info_t; /* Per TCP/UDP port info. */ typedef struct { /* Port name (used as hash key). */ u8 *name; /* UDP/TCP port number in network byte order. */ u16 port; /* Port specific format function. */ format_function_t *format_header; /* Parser for packet generator edits for this protocol. */ unformat_function_t *unformat_pg_edit; } tcp_udp_port_info_t; typedef struct { /* Per IP protocol info. */ ip_protocol_info_t *protocol_infos; /* Protocol info index hashed by 8 bit IP protocol. */ uword *protocol_info_by_protocol; /* Hash table mapping IP protocol name (see protocols.def) to protocol number. */ uword *protocol_info_by_name; /* Per TCP/UDP port info. */ tcp_udp_port_info_t *port_infos; /* Hash table from network-byte-order port to port info index. */ uword *port_info_by_port; /* Hash table mapping TCP/UDP name to port info index. */ uword *port_info_by_name; } ip_main_t; extern ip_main_t ip_main; clib_error_t *ip_main_init (vlib_main_t * vm); static inline ip_protocol_info_t * ip_get_protocol_info (ip_main_t * im, u32 protocol) { uword *p; p = hash_get (im->protocol_info_by_protocol, protocol); return p ? vec_elt_at_index (im->protocol_infos, p[0]) : 0; } static inline tcp_udp_port_info_t * ip_get_tcp_udp_port_info (ip_main_t * im, u32 port) { uword *p; p = hash_get (im->port_info_by_port, port); return p ? vec_elt_at_index (im->port_infos, p[0]) : 0; } always_inline ip_csum_t ip_incremental_checksum_buffer (vlib_main_t * vm, vlib_buffer_t * first_buffer, u32 first_buffer_offset, u32 n_bytes_to_checksum, ip_csum_t sum) { vlib_buffer_t *b = first_buffer; u32 n_bytes_left = n_bytes_to_checksum; ASSERT (b->current_length >= first_buffer_offset); void *h; u32 n; n = clib_min (n_bytes_left, b->current_length - first_buffer_offset); h = vlib_buffer_get_current (b) + first_buffer_offset; sum = ip_incremental_checksum (sum, h, n); if (PREDICT_FALSE (b->flags & VLIB_BUFFER_NEXT_PRESENT)) { while (1) { n_bytes_left -= n; if (n_bytes_left == 0) break; b = vlib_get_buffer (vm, b->next_buffer); n = clib_min (n_bytes_left, b->current_length); h = vlib_buffer_get_current (b); sum = ip_incremental_checksum (sum, h, n); } } return sum; } always_inline u16 ip_calculate_l4_checksum (vlib_main_t * vm, vlib_buffer_t * p0, ip_csum_t sum0, u32 payload_length, u8 * iph, u32 ip_header_size, u8 * l4h) { u16 sum16; u8 *data_this_buffer, length_odd; u32 n_bytes_left, n_this_buffer, n_ip_bytes_this_buffer; n_bytes_left = payload_length; if (l4h) /* packet l4 header and no buffer chain involved */ { ASSERT (p0 == NULL); n_this_buffer = payload_length; data_this_buffer = l4h; } else { ASSERT (p0); if (iph) /* ip header pointer set to packet in buffer */ { ASSERT (ip_header_size); n_this_buffer = payload_length; data_this_buffer = iph + ip_header_size; /* at l4 header */ n_ip_bytes_this_buffer = p0->current_length - (((u8 *) iph - p0->data) - p0->current_data); if (PREDICT_FALSE (payload_length + ip_header_size > n_ip_bytes_this_buffer)) { n_this_buffer = n_ip_bytes_this_buffer - ip_header_size; if (PREDICT_FALSE (n_this_buffer >> 31)) { /* error - ip header don't fit this buffer */ return 0xfefe; } } } else /* packet in buffer with no ip header */ { /* buffer current pointer at l4 header */ n_this_buffer = p0->current_length; data_this_buffer = vlib_buffer_get_current (p0); } n_this_buffer = clib_min (n_this_buffer, n_bytes_left); } while (1) { sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer); n_bytes_left -= n_this_buffer; if (n_bytes_left == 0) break; if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT)) { return 0xfefe; } length_odd = (n_this_buffer & 1); p0 = vlib_get_buffer (vm, p0->next_buffer); data_this_buffer = vlib_buffer_get_current (p0); n_this_buffer = clib_min (p0->current_length, n_bytes_left); if (PREDICT_FALSE (length_odd)) { /* Prepend a 0 byte to maintain 2-byte checksum alignment */ data_this_buffer--; n_this_buffer++; n_bytes_left++; data_this_buffer[0] = 0; } } sum16 = ~ip_csum_fold (sum0); return sum16; } void ip_del_all_interface_addresses (vlib_main_t * vm, u32 sw_if_index); extern vlib_node_registration_t ip4_inacl_node; extern vlib_node_registration_t ip6_inacl_node; void ip_table_create (fib_protocol_t fproto, u32 table_id, u8 is_api, const u8 * name); void ip_table_delete (fib_protocol_t fproto, u32 table_id, u8 is_api); int ip_table_bind (fib_protocol_t fproto, u32 sw_if_index, u32 table_id); u32 ip_table_get_unused_id (fib_protocol_t fproto); u8 ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4); u8 ip_is_local_host (ip46_address_t * ip46_address, u8 is_ip4); u8 ip4_is_local_host (ip4_address_t * ip4_address); u8 ip6_is_local_host (ip6_address_t * ip6_address); u8 ip_is_local (u32 fib_index, ip46_address_t * ip46_address, u8 is_ip4); void ip_copy (ip46_address_t * dst, ip46_address_t * src, u8 is_ip4); void ip_set (ip46_address_t * dst, void *src, u8 is_ip4); void ip_feature_enable_disable (ip_address_family_t af, ip_sub_address_family_t safi, ip_feature_location_t loc, const char *feature, u32 sw_if_index, int enable_disable, void *feature_config, u32 n_feature_config_bytes); always_inline u32 vlib_buffer_get_ip4_fib_index (vlib_buffer_t * b); always_inline u32 vlib_buffer_get_ip6_fib_index (vlib_buffer_t * b); always_inline u32 vlib_buffer_get_ip_fib_index (vlib_buffer_t * b, u8 is_ip4) { return (is_ip4 ? vlib_buffer_get_ip4_fib_index : vlib_buffer_get_ip6_fib_index) (b); } #endif /* included_ip_main_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */