2 * Copyright (c) 2018 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.
15 #include <nat/dslite.h>
16 #include <nat/nat_inlines.h>
20 DSLITE_CE_ENCAP_NEXT_IP6_LOOKUP,
21 DSLITE_CE_ENCAP_NEXT_DROP,
22 DSLITE_CE_ENCAP_N_NEXT,
23 } dslite_ce_encap_next_t;
25 static char *dslite_ce_encap_error_strings[] = {
26 #define _(sym,string) string,
31 VLIB_NODE_FN (dslite_ce_encap_node) (vlib_main_t * vm,
32 vlib_node_runtime_t * node,
35 u32 n_left_from, *from, *to_next;
36 dslite_ce_encap_next_t next_index;
37 dslite_main_t *dm = &dslite_main;
39 from = vlib_frame_vector_args (frame);
40 n_left_from = frame->n_vectors;
41 next_index = node->cached_next_index;
43 while (n_left_from > 0)
47 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
49 while (n_left_from > 0 && n_left_to_next > 0)
53 u32 next0 = DSLITE_CE_ENCAP_NEXT_IP6_LOOKUP;
54 u8 error0 = DSLITE_ERROR_CE_ENCAP;
59 /* speculatively enqueue b0 to the current next frame */
67 b0 = vlib_get_buffer (vm, bi0);
68 ip40 = vlib_buffer_get_current (b0);
69 proto0 = ip_proto_to_snat_proto (ip40->protocol);
71 if (PREDICT_FALSE (proto0 == ~0))
73 error0 = DSLITE_ERROR_UNSUPPORTED_PROTOCOL;
74 next0 = DSLITE_CE_ENCAP_NEXT_DROP;
78 /* Construct IPv6 header */
79 vlib_buffer_advance (b0, -(sizeof (ip6_header_t)));
80 ip60 = vlib_buffer_get_current (b0);
81 ip60->ip_version_traffic_class_and_flow_label =
82 clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20));
83 ip60->payload_length = ip40->length;
84 ip60->protocol = IP_PROTOCOL_IP_IN_IP;
85 ip60->hop_limit = ip40->ttl;
86 ip60->dst_address.as_u64[0] = dm->aftr_ip6_addr.as_u64[0];
87 ip60->dst_address.as_u64[1] = dm->aftr_ip6_addr.as_u64[1];
88 ip60->src_address.as_u64[0] = dm->b4_ip6_addr.as_u64[0];
89 ip60->src_address.as_u64[1] = dm->b4_ip6_addr.as_u64[1];
92 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
93 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
95 dslite_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
96 t->next_index = next0;
99 b0->error = node->errors[error0];
101 /* verify speculative enqueue, maybe switch current next frame */
102 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
103 n_left_to_next, bi0, next0);
105 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
108 return frame->n_vectors;
112 VLIB_REGISTER_NODE (dslite_ce_encap_node) = {
113 .name = "dslite-ce-encap",
114 .vector_size = sizeof (u32),
115 .format_trace = format_dslite_ce_trace,
116 .type = VLIB_NODE_TYPE_INTERNAL,
117 .n_errors = ARRAY_LEN (dslite_ce_encap_error_strings),
118 .error_strings = dslite_ce_encap_error_strings,
119 .n_next_nodes = DSLITE_CE_ENCAP_N_NEXT,
120 /* edit / add dispositions here */
122 [DSLITE_CE_ENCAP_NEXT_DROP] = "error-drop",
123 [DSLITE_CE_ENCAP_NEXT_IP6_LOOKUP] = "ip6-lookup",
129 * fd.io coding-style-patch-verification: ON
132 * eval: (c-set-style "gnu")