/*--------------------------------------------------------------------------- * Copyright (c) 2009-2014 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. *--------------------------------------------------------------------------- */ /* * Defines used for testing various optimisation schemes */ #define SIXRD_ENCAP_DUAL 0 #include "sixrd.h" static vlib_node_registration_t ip6_sixrd_node; typedef enum { IP6_SIXRD_NEXT_IP4_LOOKUP, IP6_SIXRD_NEXT_DROP, IP6_SIXRD_N_NEXT, } ip6_sixrd_next_t; /* * ip6_sixrd */ static uword ip6_sixrd (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame) { u32 n_left_from, *from, next_index, *to_next, n_left_to_next; vlib_node_runtime_t *error_node = vlib_node_get_runtime(vm, ip6_sixrd_node.index); u32 encap = 0; from = vlib_frame_vector_args(frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { u32 pi0; vlib_buffer_t *p0; sixrd_domain_t *d0; u8 error0 = SIXRD_ERROR_NONE; ip6_header_t *ip60; ip4_header_t *ip4h0; u32 next0 = IP6_SIXRD_NEXT_IP4_LOOKUP; u32 sixrd_domain_index0 = ~0; pi0 = to_next[0] = from[0]; from += 1; n_left_from -= 1; to_next +=1; n_left_to_next -= 1; p0 = vlib_get_buffer(vm, pi0); ip60 = vlib_buffer_get_current(p0); // p0->current_length = clib_net_to_host_u16(ip40->length); d0 = ip6_sixrd_get_domain(vnet_buffer(p0)->ip.adj_index[VLIB_TX], &sixrd_domain_index0); ASSERT(d0); /* SIXRD calc */ u64 dal60 = clib_net_to_host_u64(ip60->dst_address.as_u64[0]); u32 da40 = sixrd_get_addr(d0, dal60); u16 len = clib_net_to_host_u16(ip60->payload_length) + 60; if (da40 == 0) error0 = SIXRD_ERROR_UNKNOWN; /* construct ipv4 header */ vlib_buffer_advance(p0, - (sizeof(ip4_header_t))); ip4h0 = vlib_buffer_get_current(p0); vnet_buffer(p0)->sw_if_index[VLIB_TX] = (u32)~0; ip4h0->ip_version_and_header_length = 0x45; ip4h0->tos = 0; ip4h0->length = clib_host_to_net_u16(len); ip4h0->fragment_id = 0; ip4h0->flags_and_fragment_offset = 0; ip4h0->ttl = 0x40; ip4h0->protocol = IP_PROTOCOL_IPV6; ip4h0->src_address = d0->ip4_src; ip4h0->dst_address.as_u32 = clib_host_to_net_u32(da40); ip4h0->checksum = ip4_header_checksum(ip4h0); next0 = error0 == SIXRD_ERROR_NONE ? IP6_SIXRD_NEXT_IP4_LOOKUP : IP6_SIXRD_NEXT_DROP; if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED)) { sixrd_trace_t *tr = vlib_add_trace(vm, node, p0, sizeof(*tr)); tr->sixrd_domain_index = sixrd_domain_index0; } p0->error = error_node->errors[error0]; if (PREDICT_TRUE(error0 == SIXRD_ERROR_NONE)) encap++; vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, pi0, next0); } vlib_put_next_frame(vm, node, next_index, n_left_to_next); } vlib_node_increment_counter(vm, ip6_sixrd_node.index, SIXRD_ERROR_ENCAPSULATED, encap); return frame->n_vectors; } static char *sixrd_error_strings[] = { #define _(sym,string) string, foreach_sixrd_error #undef _ }; VLIB_REGISTER_NODE(ip6_sixrd_node,static) = { .function = ip6_sixrd, .name = "ip6-sixrd", .vector_size = sizeof(u32), .format_trace = format_sixrd_trace, .n_errors = SIXRD_N_ERROR, .error_strings = sixrd_error_strings, .n_next_nodes = IP6_SIXRD_N_NEXT, .next_nodes = { [IP6_SIXRD_NEXT_IP4_LOOKUP] = "ip4-lookup", [IP6_SIXRD_NEXT_DROP] = "error-drop", }, };