--- /dev/null
+/*
+ * Copyright (c) 2018 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.
+ */
+
+#include <plugins/gbp/gbp.h>
+
+/**
+ * Grouping of global data for the GBP source EPG classification feature
+ */
+typedef struct gbp_policy_main_t_
+{
+ /**
+ * Next nodes for L2 output features
+ */
+ u32 l2_output_feat_next[32];
+} gbp_policy_main_t;
+
+static gbp_policy_main_t gbp_policy_main;
+
+#define foreach_gbp_policy \
+ _(DENY, "deny")
+
+typedef enum
+{
+#define _(sym,str) GBP_ERROR_##sym,
+ foreach_gbp_policy
+#undef _
+ GBP_POLICY_N_ERROR,
+} gbp_policy_error_t;
+
+static char *gbp_policy_error_strings[] = {
+#define _(sym,string) string,
+ foreach_gbp_policy
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) GBP_POLICY_NEXT_##sym,
+ foreach_gbp_policy
+#undef _
+ GBP_POLICY_N_NEXT,
+} gbp_policy_next_t;
+
+/**
+ * per-packet trace data
+ */
+typedef struct gbp_policy_trace_t_
+{
+ /* per-pkt trace data */
+ epg_id_t src_epg;
+ epg_id_t dst_epg;
+ u32 acl_index;
+} gbp_policy_trace_t;
+
+static uword
+gbp_policy (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ gbp_policy_main_t *gpm = &gbp_policy_main;
+ u32 n_left_from, *from, *to_next;
+ u32 next_index;
+
+ next_index = 0;
+ n_left_from = frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ gbp_policy_next_t next0;
+ gbp_contract_key_t key0;
+ u32 bi0, sw_if_index0;
+ vlib_buffer_t *b0;
+ u32 acl_index0;
+
+ next0 = GBP_POLICY_NEXT_DENY;
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ /*
+ * determine the src and dst EPG
+ */
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ key0.gck_dst = gbp_port_to_epg (sw_if_index0);
+ key0.gck_src = vnet_buffer2 (b0)->gbp.src_epg;
+ acl_index0 = ~0;
+
+ if (~0 != key0.gck_src)
+ {
+ if (PREDICT_FALSE (key0.gck_src == key0.gck_dst))
+ {
+ /*
+ * intra-epg allowed
+ */
+ next0 = vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
+ L2OUTPUT_FEAT_GBP_POLICY);
+ }
+ else
+ {
+ acl_index0 = gbp_acl_lookup (&key0);
+
+ if (~0 != acl_index0)
+ {
+ /*
+ * TODO tests against the ACL
+ */
+ /*
+ * ACL tables are not available outside of ACL plugin
+ * until then bypass the ACL to next node
+ */
+ next0 =
+ vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
+ L2OUTPUT_FEAT_GBP_POLICY);
+ }
+ }
+ }
+ else
+ {
+ /*
+ * the src EPG is not set when the packet arrives on an EPG
+ * uplink interface and we do not need to apply policy
+ */
+ next0 = vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
+ L2OUTPUT_FEAT_GBP_POLICY);
+ }
+
+ if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ gbp_policy_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->src_epg = key0.gck_src;
+ t->dst_epg = key0.gck_dst;
+ t->acl_index = acl_index0;
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+/* packet trace format function */
+static u8 *
+format_gbp_policy_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ gbp_policy_trace_t *t = va_arg (*args, gbp_policy_trace_t *);
+
+ s =
+ format (s, "src:%d, dst:%d, acl:%d", t->src_epg, t->dst_epg,
+ t->acl_index);
+
+ return s;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (gbp_policy_node) = {
+ .function = gbp_policy,
+ .name = "gbp-policy",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_policy_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(gbp_policy_error_strings),
+ .error_strings = gbp_policy_error_strings,
+
+ .n_next_nodes = GBP_POLICY_N_NEXT,
+
+ .next_nodes = {
+ [GBP_POLICY_NEXT_DENY] = "error-drop",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_policy_node, gbp_policy);
+
+/* *INDENT-ON* */
+
+static clib_error_t *
+gbp_policy_init (vlib_main_t * vm)
+{
+ gbp_policy_main_t *gpm = &gbp_policy_main;
+
+ /* Initialize the feature next-node indexes */
+ feat_bitmap_init_next_nodes (vm,
+ gbp_policy_node.index,
+ L2OUTPUT_N_FEAT,
+ l2output_get_feat_names (),
+ gpm->l2_output_feat_next);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (gbp_policy_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff