/* * 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/ip6_pg: IP v4 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/ip/ip.h> #include <vnet/pg/pg.h> static void ip6_pg_edit_function (pg_main_t * pg, pg_stream_t * s, pg_edit_group_t * g, u32 * packets, u32 n_packets) { vlib_main_t *vm = vlib_get_main (); u32 ip_header_offset = g->start_byte_offset; while (n_packets >= 2) { u32 pi0, pi1; vlib_buffer_t *p0, *p1; ip6_header_t *ip0, *ip1; pi0 = packets[0]; pi1 = packets[1]; p0 = vlib_get_buffer (vm, pi0); p1 = vlib_get_buffer (vm, pi1); n_packets -= 2; packets += 2; ip0 = (void *) (p0->data + ip_header_offset); ip1 = (void *) (p1->data + ip_header_offset); ip0->payload_length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, p0) - ip_header_offset - sizeof (ip0[0])); ip1->payload_length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, p1) - ip_header_offset - sizeof (ip1[0])); } while (n_packets >= 1) { u32 pi0; vlib_buffer_t *p0; ip6_header_t *ip0; pi0 = packets[0]; p0 = vlib_get_buffer (vm, pi0); n_packets -= 1; packets += 1; ip0 = (void *) (p0->data + ip_header_offset); ip0->payload_length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, p0) - ip_header_offset - sizeof (ip0[0])); } } typedef struct { pg_edit_t ip_version; pg_edit_t traffic_class; pg_edit_t flow_label; pg_edit_t payload_length; pg_edit_t protocol; pg_edit_t hop_limit; pg_edit_t src_address, dst_address; } pg_ip6_header_t; static inline void pg_ip6_header_init (pg_ip6_header_t * p) { /* Initialize fields that are not bit fields in the IP header. */ #define _(f) pg_edit_init (&p->f, ip6_header_t, f); _(payload_length); _(hop_limit); _(protocol); _(src_address); _(dst_address); #undef _ /* Initialize bit fields. */ pg_edit_init_bitfield (&p->ip_version, ip6_header_t, ip_version_traffic_class_and_flow_label, 28, 4); pg_edit_init_bitfield (&p->traffic_class, ip6_header_t, ip_version_traffic_class_and_flow_label, 20, 8); pg_edit_init_bitfield (&p->flow_label, ip6_header_t, ip_version_traffic_class_and_flow_label, 0, 20); } uword unformat_pg_ip6_header (unformat_input_t * input, va_list * args) { pg_stream_t *s = va_arg (*args, pg_stream_t *); pg_ip6_header_t *p; u32 group_index; p = pg_create_edit_group (s, sizeof (p[0]), sizeof (ip6_header_t), &group_index); pg_ip6_header_init (p); /* Defaults. */ pg_edit_set_fixed (&p->ip_version, 6); pg_edit_set_fixed (&p->traffic_class, 0); pg_edit_set_fixed (&p->flow_label, 0); pg_edit_set_fixed (&p->hop_limit, 64); p->payload_length.type = PG_EDIT_UNSPECIFIED; if (!unformat (input, "%U: %U -> %U", unformat_pg_edit, unformat_ip_protocol, &p->protocol, unformat_pg_edit, unformat_ip6_address, &p->src_address, unformat_pg_edit, unformat_ip6_address, &p->dst_address)) goto error; /* Parse options. */ while (1) { if (unformat (input, "version %U", unformat_pg_edit, unformat_pg_number, &p->ip_version)) ; else if (unformat (input, "traffic-class %U", unformat_pg_edit, unformat_pg_number, &p->traffic_class)) ; else if (unformat (input, "length %U", unformat_pg_edit, unformat_pg_number, &p->payload_length)) ; else if (unformat (input, "hop-limit %U", unformat_pg_edit, unformat_pg_number, &p->hop_limit)) ; /* Can't parse input: try next protocol level. */ else break; } { ip_main_t *im = &ip_main; ip_protocol_t protocol; ip_protocol_info_t *pi; pi = 0; if (p->protocol.type == PG_EDIT_FIXED) { protocol = pg_edit_get_value (&p->protocol, PG_EDIT_LO); pi = ip_get_protocol_info (im, protocol); } 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; if (p->payload_length.type == PG_EDIT_UNSPECIFIED && s->min_packet_bytes == s->max_packet_bytes && group_index + 1 < vec_len (s->edit_groups)) { pg_edit_set_fixed (&p->payload_length, pg_edit_group_n_bytes (s, group_index) - sizeof (ip6_header_t)); } p = pg_get_edit_group (s, group_index); if (p->payload_length.type == PG_EDIT_UNSPECIFIED) { pg_edit_group_t *g = pg_stream_get_group (s, group_index); g->edit_function = ip6_pg_edit_function; } 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: */