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.
16 #include <plugins/gbp/gbp.h>
19 * Grouping of global data for the GBP source EPG classification feature
21 typedef struct gbp_policy_main_t_
24 * Next nodes for L2 output features
26 u32 l2_output_feat_next[32];
29 static gbp_policy_main_t gbp_policy_main;
31 #define foreach_gbp_policy \
36 #define _(sym,str) GBP_ERROR_##sym,
42 static char *gbp_policy_error_strings[] = {
43 #define _(sym,string) string,
50 #define _(sym,str) GBP_POLICY_NEXT_##sym,
57 * per-packet trace data
59 typedef struct gbp_policy_trace_t_
61 /* per-pkt trace data */
68 gbp_policy (vlib_main_t * vm,
69 vlib_node_runtime_t * node, vlib_frame_t * frame)
71 gbp_policy_main_t *gpm = &gbp_policy_main;
72 u32 n_left_from, *from, *to_next;
76 n_left_from = frame->n_vectors;
77 from = vlib_frame_vector_args (frame);
79 while (n_left_from > 0)
83 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
85 while (n_left_from > 0 && n_left_to_next > 0)
87 gbp_policy_next_t next0;
88 gbp_contract_key_t key0;
89 u32 bi0, sw_if_index0;
93 next0 = GBP_POLICY_NEXT_DENY;
101 b0 = vlib_get_buffer (vm, bi0);
104 * determine the src and dst EPG
106 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
107 key0.gck_dst = gbp_port_to_epg (sw_if_index0);
108 key0.gck_src = vnet_buffer2 (b0)->gbp.src_epg;
111 if (~0 != key0.gck_src)
113 if (PREDICT_FALSE (key0.gck_src == key0.gck_dst))
118 next0 = vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
119 L2OUTPUT_FEAT_GBP_POLICY);
123 acl_index0 = gbp_acl_lookup (&key0);
125 if (~0 != acl_index0)
128 * TODO tests against the ACL
131 * ACL tables are not available outside of ACL plugin
132 * until then bypass the ACL to next node
135 vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
136 L2OUTPUT_FEAT_GBP_POLICY);
143 * the src EPG is not set when the packet arrives on an EPG
144 * uplink interface and we do not need to apply policy
146 next0 = vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
147 L2OUTPUT_FEAT_GBP_POLICY);
150 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
152 gbp_policy_trace_t *t =
153 vlib_add_trace (vm, node, b0, sizeof (*t));
154 t->src_epg = key0.gck_src;
155 t->dst_epg = key0.gck_dst;
156 t->acl_index = acl_index0;
159 /* verify speculative enqueue, maybe switch current next frame */
160 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
161 to_next, n_left_to_next,
165 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
168 return frame->n_vectors;
171 /* packet trace format function */
173 format_gbp_policy_trace (u8 * s, va_list * args)
175 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
176 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
177 gbp_policy_trace_t *t = va_arg (*args, gbp_policy_trace_t *);
180 format (s, "src:%d, dst:%d, acl:%d", t->src_epg, t->dst_epg,
187 VLIB_REGISTER_NODE (gbp_policy_node) = {
188 .function = gbp_policy,
189 .name = "gbp-policy",
190 .vector_size = sizeof (u32),
191 .format_trace = format_gbp_policy_trace,
192 .type = VLIB_NODE_TYPE_INTERNAL,
194 .n_errors = ARRAY_LEN(gbp_policy_error_strings),
195 .error_strings = gbp_policy_error_strings,
197 .n_next_nodes = GBP_POLICY_N_NEXT,
200 [GBP_POLICY_NEXT_DENY] = "error-drop",
204 VLIB_NODE_FUNCTION_MULTIARCH (gbp_policy_node, gbp_policy);
208 static clib_error_t *
209 gbp_policy_init (vlib_main_t * vm)
211 gbp_policy_main_t *gpm = &gbp_policy_main;
213 /* Initialize the feature next-node indexes */
214 feat_bitmap_init_next_nodes (vm,
215 gbp_policy_node.index,
217 l2output_get_feat_names (),
218 gpm->l2_output_feat_next);
223 VLIB_INIT_FUNCTION (gbp_policy_init);
226 * fd.io coding-style-patch-verification: ON
229 * eval: (c-set-style "gnu")