fib: Decouple source from priority and behaviour - vpp

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author	Neale Ranns <nranns@cisco.com>	2019-12-04 06:11:00 +0000
committer	Ole Trøan <otroan@employees.org>	2019-12-04 22:47:12 +0000
commit	3bab8f9c5396a7bf1115b93a9e0691a76a9ed14c (patch)
tree	0212708b47f042ac393848e0471669f837788278 /src/vnet/fib/fib_entry_src.h
parent	5f8f6173328f8d77feea5fd100e150c3094c11f0 (diff)

fib: Decouple source from priority and behaviour

Type: feature the fib_source_t enum alone no longer defines the priority and behaviour, instead each source must be allocated these attributes. This allows the creation of other sources by the plugins (and soon over the API). Signed-off-by: Neale Ranns <nranns@cisco.com> Change-Id: I890ee820fbc16079ee417ea1fbc163192806e853

Diffstat (limited to 'src/vnet/fib/fib_entry_src.h')

-rw-r--r--

src/vnet/fib/fib_entry_src.h

1 files changed, 4 insertions, 4 deletions

/* * 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/udp_pg: UDP packet-generator interface * * 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. */ #include <vnet/pg/pg.h> #include <vnet/ip/ip.h> /* for unformat_udp_udp_port */ #define UDP_PG_EDIT_LENGTH (1 << 0) #define UDP_PG_EDIT_CHECKSUM (1 << 1) always_inline void udp_pg_edit_function_inline (pg_main_t * pg, pg_stream_t * s, pg_edit_group_t * g, u32 * packets, u32 n_packets, u32 flags) { vlib_main_t *vm = vlib_get_main (); u32 ip_offset, udp_offset; udp_offset = g->start_byte_offset; ip_offset = (g - 1)->start_byte_offset; while (n_packets >= 1) { vlib_buffer_t *p0; ip4_header_t *ip0; udp_header_t *udp0; u32 udp_len0; p0 = vlib_get_buffer (vm, packets[0]); n_packets -= 1; packets += 1; ip0 = (void *) (p0->data + ip_offset); udp0 = (void *) (p0->data + udp_offset); udp_len0 = clib_net_to_host_u16 (ip0->length) - sizeof (ip0[0]); if (flags & UDP_PG_EDIT_LENGTH) udp0->length = clib_net_to_host_u16 (vlib_buffer_length_in_chain (vm, p0) - ip_offset); /* Initialize checksum with header. */ if (flags & UDP_PG_EDIT_CHECKSUM) { ip_csum_t sum0; sum0 = clib_mem_unaligned (&ip0->src_address, u64); sum0 = ip_csum_with_carry (sum0, clib_host_to_net_u32 (udp_len0 + (ip0->protocol << 16))); /* Invalidate possibly old checksum. */ udp0->checksum = 0; sum0 = ip_incremental_checksum_buffer (vm, p0, udp_offset, udp_len0, sum0); sum0 = ~ip_csum_fold (sum0); /* Zero checksum means checksumming disabled. */ sum0 = sum0 != 0 ? sum0 : 0xffff; udp0->checksum = sum0; } } } static void udp_pg_edit_function (pg_main_t * pg, pg_stream_t * s, pg_edit_group_t * g, u32 * packets, u32 n_packets) { switch (g->edit_function_opaque) { case UDP_PG_EDIT_LENGTH: udp_pg_edit_function_inline (pg, s, g, packets, n_packets, UDP_PG_EDIT_LENGTH); break; case UDP_PG_EDIT_CHECKSUM: udp_pg_edit_function_inline (pg, s, g, packets, n_packets, UDP_PG_EDIT_CHECKSUM); break; case UDP_PG_EDIT_CHECKSUM | UDP_PG_EDIT_LENGTH: udp_pg_edit_function_inline (pg, s, g, packets, n_packets, UDP_PG_EDIT_CHECKSUM | UDP_PG_EDIT_LENGTH); break; default: ASSERT (0); break; } } typedef struct { pg_edit_t src_port, dst_port; pg_edit_t length; pg_edit_t checksum; } pg_udp_header_t; static inline void pg_udp_header_init (pg_udp_header_t * p) { /* Initialize fields that are not bit fields in the IP header. */ #define _(f) pg_edit_init (&p->f, udp_header_t, f); _(src_port); _(dst_port); _(length); _(checksum); #undef _ } uword unformat_pg_udp_header (unformat_input_t * input, va_list * args) { pg_stream_t *s = va_arg (*args, pg_stream_t *); pg_udp_header_t *p; u32 group_index; p = pg_create_edit_group (s, sizeof (p[0]), sizeof (udp_header_t), &group_index); pg_udp_header_init (p); /* Defaults. */ p->checksum.type = PG_EDIT_UNSPECIFIED; p->length.type = PG_EDIT_UNSPECIFIED; if (!unformat (input, "UDP: %U -> %U", unformat_pg_edit, unformat_tcp_udp_port, &p->src_port, unformat_pg_edit, unformat_tcp_udp_port, &p->dst_port)) goto error; /* Parse options. */ while (1) { if (unformat (input, "length %U", unformat_pg_edit, unformat_pg_number, &p->length)) ; else if (unformat (input, "checksum %U", unformat_pg_edit, unformat_pg_number, &p->checksum)) ; /* Can't parse input: try next protocol level. */ else break; } { ip_main_t *im = &ip_main; u16 dst_port; tcp_udp_port_info_t *pi; pi = 0; if (p->dst_port.type == PG_EDIT_FIXED) { dst_port = pg_edit_get_value (&p->dst_port, PG_EDIT_LO); pi = ip_get_tcp_udp_port_info (im, dst_port); } if (pi && pi->unformat_pg_edit && unformat_user (input, pi->unformat_pg_edit, s)) ; else if (!unformat_user (input, unformat_pg_payload, s)) goto error; p = pg_get_edit_group (s, group_index); if (p->checksum.type == PG_EDIT_UNSPECIFIED || p->length.type == PG_EDIT_UNSPECIFIED) { pg_edit_group_t *g = pg_stream_get_group (s, group_index); g->edit_function = udp_pg_edit_function; g->edit_function_opaque = 0; if (p->checksum.type == PG_EDIT_UNSPECIFIED) g->edit_function_opaque |= UDP_PG_EDIT_CHECKSUM; if (p->length.type == PG_EDIT_UNSPECIFIED) g->edit_function_opaque |= UDP_PG_EDIT_LENGTH; } return 1; } error: /* Free up any edits we may have added. */ pg_free_edit_group (s); return 0; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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