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>
18 vlib_node_registration_t dslite_ce_decap_node;
22 DSLITE_CE_DECAP_NEXT_IP4_LOOKUP,
23 DSLITE_IN2OUT_NEXT_IP6_ICMP,
24 DSLITE_CE_DECAP_NEXT_DROP,
25 DSLITE_CE_DECAP_N_NEXT,
26 } dslite_ce_decap_next_t;
28 static char *dslite_ce_decap_error_strings[] = {
29 #define _(sym,string) string,
35 dslite_ce_decap_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
38 u32 n_left_from, *from, *to_next;
39 dslite_ce_decap_next_t next_index;
41 from = vlib_frame_vector_args (frame);
42 n_left_from = frame->n_vectors;
43 next_index = node->cached_next_index;
45 while (n_left_from > 0)
49 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
51 while (n_left_from > 0 && n_left_to_next > 0)
55 u32 next0 = DSLITE_CE_DECAP_NEXT_IP4_LOOKUP;
56 u8 error0 = DSLITE_ERROR_CE_DECAP;
61 /* speculatively enqueue b0 to the current next frame */
69 b0 = vlib_get_buffer (vm, bi0);
70 ip60 = vlib_buffer_get_current (b0);
72 if (PREDICT_FALSE (ip60->protocol != IP_PROTOCOL_IP_IN_IP))
74 if (ip60->protocol == IP_PROTOCOL_ICMP6)
76 next0 = DSLITE_IN2OUT_NEXT_IP6_ICMP;
79 error0 = DSLITE_ERROR_BAD_IP6_PROTOCOL;
80 next0 = DSLITE_CE_DECAP_NEXT_DROP;
84 ip40 = vlib_buffer_get_current (b0) + sizeof (ip6_header_t);
85 proto0 = ip_proto_to_snat_proto (ip40->protocol);
87 if (PREDICT_FALSE (proto0 == ~0))
89 error0 = DSLITE_ERROR_UNSUPPORTED_PROTOCOL;
90 next0 = DSLITE_CE_DECAP_NEXT_DROP;
96 (ip60->ip_version_traffic_class_and_flow_label) & 0x0ff00000) >>
98 vlib_buffer_advance (b0, sizeof (ip6_header_t));
101 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
102 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
104 dslite_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
105 t->next_index = next0;
108 b0->error = node->errors[error0];
110 /* verify speculative enqueue, maybe switch current next frame */
111 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
112 n_left_to_next, bi0, next0);
114 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
117 return frame->n_vectors;
121 VLIB_REGISTER_NODE (dslite_ce_decap_node) = {
122 .function = dslite_ce_decap_node_fn,
123 .name = "dslite-ce-decap",
124 .vector_size = sizeof (u32),
125 .format_trace = format_dslite_ce_trace,
126 .type = VLIB_NODE_TYPE_INTERNAL,
127 .n_errors = ARRAY_LEN (dslite_ce_decap_error_strings),
128 .error_strings = dslite_ce_decap_error_strings,
129 .n_next_nodes = DSLITE_CE_DECAP_N_NEXT,
130 /* edit / add dispositions here */
132 [DSLITE_CE_DECAP_NEXT_DROP] = "error-drop",
133 [DSLITE_CE_DECAP_NEXT_IP4_LOOKUP] = "ip4-lookup",
134 [DSLITE_IN2OUT_NEXT_IP6_ICMP] = "ip6-icmp-input",
139 VLIB_NODE_FUNCTION_MULTIARCH (dslite_ce_decap_node, dslite_ce_decap_node_fn);
142 * fd.io coding-style-patch-verification: ON
145 * eval: (c-set-style "gnu")