--- /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>
+#include <plugins/gbp/gbp_policy_dpo.h>
+#include <plugins/gbp/gbp_recirc.h>
+
+#include <vnet/dpo/dvr_dpo.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vnet/fib/ip6_fib.h>
+#include <vnet/dpo/load_balance.h>
+
+/**
+ * DPO pool
+ */
+static gbp_policy_dpo_t *gbp_policy_dpo_pool;
+
+/**
+ * DPO type registered for these GBP FWD
+ */
+static dpo_type_t gbp_policy_dpo_type;
+
+static inline gbp_policy_dpo_t *
+gbp_policy_dpo_get_i (index_t index)
+{
+ return (pool_elt_at_index (gbp_policy_dpo_pool, index));
+}
+
+gbp_policy_dpo_t *
+gbp_policy_dpo_get (index_t index)
+{
+ return (gbp_policy_dpo_get_i (index));
+}
+
+static gbp_policy_dpo_t *
+gbp_policy_dpo_alloc (void)
+{
+ gbp_policy_dpo_t *gpd;
+
+ pool_get (gbp_policy_dpo_pool, gpd);
+
+ return (gpd);
+}
+
+static inline gbp_policy_dpo_t *
+gbp_policy_dpo_get_from_dpo (const dpo_id_t * dpo)
+{
+ ASSERT (gbp_policy_dpo_type == dpo->dpoi_type);
+
+ return (gbp_policy_dpo_get_i (dpo->dpoi_index));
+}
+
+static inline index_t
+gbp_policy_dpo_get_index (gbp_policy_dpo_t * gpd)
+{
+ return (gpd - gbp_policy_dpo_pool);
+}
+
+static void
+gbp_policy_dpo_lock (dpo_id_t * dpo)
+{
+ gbp_policy_dpo_t *gpd;
+
+ gpd = gbp_policy_dpo_get_from_dpo (dpo);
+ gpd->gpd_locks++;
+}
+
+static void
+gbp_policy_dpo_unlock (dpo_id_t * dpo)
+{
+ gbp_policy_dpo_t *gpd;
+
+ gpd = gbp_policy_dpo_get_from_dpo (dpo);
+ gpd->gpd_locks--;
+
+ if (0 == gpd->gpd_locks)
+ {
+ dpo_reset (&gpd->gpd_dpo);
+ pool_put (gbp_policy_dpo_pool, gpd);
+ }
+}
+
+void
+gbp_policy_dpo_add_or_lock (dpo_proto_t dproto,
+ epg_id_t epg, u32 sw_if_index, dpo_id_t * dpo)
+{
+ gbp_policy_dpo_t *gpd;
+ dpo_id_t parent = DPO_INVALID;
+
+ gpd = gbp_policy_dpo_alloc ();
+ memset (gpd, 0, sizeof (*gpd));
+
+ gpd->gpd_proto = dproto;
+ gpd->gpd_sw_if_index = sw_if_index;
+ gpd->gpd_epg = epg;
+
+ /*
+ * stack on the DVR DPO for the output interface
+ */
+ dvr_dpo_add_or_lock (sw_if_index, dproto, &parent);
+
+ dpo_stack (gbp_policy_dpo_type, dproto, &gpd->gpd_dpo, &parent);
+
+ dpo_set (dpo, gbp_policy_dpo_type, dproto, gbp_policy_dpo_get_index (gpd));
+}
+
+u8 *
+format_gbp_policy_dpo (u8 * s, va_list * ap)
+{
+ index_t index = va_arg (*ap, index_t);
+ u32 indent = va_arg (*ap, u32);
+ gbp_policy_dpo_t *gpd = gbp_policy_dpo_get_i (index);
+ vnet_main_t *vnm = vnet_get_main ();
+
+ s = format (s, "gbp-policy-dpo: %U, epg:%d out:%U",
+ format_dpo_proto, gpd->gpd_proto,
+ gpd->gpd_epg,
+ format_vnet_sw_if_index_name, vnm, gpd->gpd_sw_if_index);
+ s = format (s, "\n%U", format_white_space, indent + 2);
+ s = format (s, "%U", format_dpo_id, &gpd->gpd_dpo, indent + 4);
+
+ return (s);
+}
+
+const static dpo_vft_t gbp_policy_dpo_vft = {
+ .dv_lock = gbp_policy_dpo_lock,
+ .dv_unlock = gbp_policy_dpo_unlock,
+ .dv_format = format_gbp_policy_dpo,
+};
+
+/**
+ * @brief The per-protocol VLIB graph nodes that are assigned to a glean
+ * object.
+ *
+ * this means that these graph nodes are ones from which a glean is the
+ * parent object in the DPO-graph.
+ */
+const static char *const gbp_policy_dpo_ip4_nodes[] = {
+ "ip4-gbp-policy-dpo",
+ NULL,
+};
+
+const static char *const gbp_policy_dpo_ip6_nodes[] = {
+ "ip6-gbp-policy-dpo",
+ NULL,
+};
+
+const static char *const *const gbp_policy_dpo_nodes[DPO_PROTO_NUM] = {
+ [DPO_PROTO_IP4] = gbp_policy_dpo_ip4_nodes,
+ [DPO_PROTO_IP6] = gbp_policy_dpo_ip6_nodes,
+};
+
+dpo_type_t
+gbp_policy_dpo_get_type (void)
+{
+ return (gbp_policy_dpo_type);
+}
+
+static clib_error_t *
+gbp_policy_dpo_module_init (vlib_main_t * vm)
+{
+ gbp_policy_dpo_type = dpo_register_new_type (&gbp_policy_dpo_vft,
+ gbp_policy_dpo_nodes);
+
+ return (NULL);
+}
+
+VLIB_INIT_FUNCTION (gbp_policy_dpo_module_init);
+
+typedef struct gbp_policy_dpo_trace_t_
+{
+ u32 src_epg;
+ u32 dst_epg;
+ u32 acl_index;
+} gbp_policy_dpo_trace_t;
+
+typedef enum
+{
+ GBP_POLICY_DROP,
+ GBP_POLICY_N_NEXT,
+} gbp_policy_next_t;
+
+always_inline uword
+gbp_policy_dpo_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, fib_protocol_t fproto)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ 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)
+ {
+ const gbp_policy_dpo_t *gpd0;
+ u32 bi0, next0, acl_index0;
+ gbp_contract_key_t key0;
+ vlib_buffer_t *b0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+ next0 = GBP_POLICY_DROP;
+ acl_index0 = ~0;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ gpd0 =
+ gbp_policy_dpo_get_i (vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = gpd0->gpd_dpo.dpoi_index;
+
+ key0.gck_src = vnet_buffer2 (b0)->gbp.src_epg;
+ key0.gck_dst = gpd0->gpd_epg;
+
+ if (~0 != key0.gck_src)
+ {
+ if (PREDICT_FALSE (key0.gck_src == key0.gck_dst))
+ {
+ /*
+ * intra-epg allowed
+ */
+ next0 = gpd0->gpd_dpo.dpoi_next_node;
+ }
+ 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 = gpd0->gpd_dpo.dpoi_next_node;
+ }
+ }
+ }
+ 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 = gpd0->gpd_dpo.dpoi_next_node;
+ }
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ gbp_policy_dpo_trace_t *tr;
+
+ tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->src_epg = key0.gck_src;
+ tr->dst_epg = key0.gck_dst;
+ tr->acl_index = acl_index0;
+ }
+
+ 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 from_frame->n_vectors;
+}
+
+static u8 *
+format_gbp_policy_dpo_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_dpo_trace_t *t = va_arg (*args, gbp_policy_dpo_trace_t *);
+
+ s = format (s, " src-epg:%d dst-epg:%d acl-index:%d",
+ t->src_epg, t->dst_epg, t->acl_index);
+
+ return s;
+}
+
+static uword
+ip4_gbp_policy_dpo (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+ return (gbp_policy_dpo_inline (vm, node, from_frame, FIB_PROTOCOL_IP4));
+}
+
+static uword
+ip6_gbp_policy_dpo (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+ return (gbp_policy_dpo_inline (vm, node, from_frame, FIB_PROTOCOL_IP6));
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_gbp_policy_dpo_node) = {
+ .function = ip4_gbp_policy_dpo,
+ .name = "ip4-gbp-policy-dpo",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_policy_dpo_trace,
+ .n_next_nodes = GBP_POLICY_N_NEXT,
+ .next_nodes =
+ {
+ [GBP_POLICY_DROP] = "ip4-drop",
+ }
+};
+VLIB_REGISTER_NODE (ip6_gbp_policy_dpo_node) = {
+ .function = ip6_gbp_policy_dpo,
+ .name = "ip6-gbp-policy-dpo",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_policy_dpo_trace,
+ .n_next_nodes = GBP_POLICY_N_NEXT,
+ .next_nodes =
+ {
+ [GBP_POLICY_DROP] = "ip6-drop",
+ }
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_gbp_policy_dpo_node, ip4_gbp_policy_dpo)
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_gbp_policy_dpo_node, ip6_gbp_policy_dpo)
+/* *INDENT-ON* */
+
+ /**
+ * per-packet trace data
+ */
+typedef struct gbp_classify_trace_t_
+{
+ /* per-pkt trace data */
+ epg_id_t src_epg;
+} gbp_classify_trace_t;
+
+typedef enum gbp_lpm_classify_next_t_
+{
+ GPB_LPM_CLASSIFY_DROP,
+} gbp_lpm_classify_next_t;
+
+/*
+ * Determine the SRC EPG from a LPM
+ */
+always_inline uword
+gbp_lpm_classify_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, fib_protocol_t fproto)
+{
+ 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)
+ {
+ u32 bi0, sw_if_index0, fib_index0, lbi0;
+ gbp_lpm_classify_next_t next0;
+ const gbp_policy_dpo_t *gpd0;
+ const gbp_recirc_t *gr0;
+ const dpo_id_t *dpo0;
+ load_balance_t *lb0;
+ ip4_header_t *ip4_0;
+ ip6_header_t *ip6_0;
+ vlib_buffer_t *b0;
+ epg_id_t src_epg0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+ next0 = GPB_LPM_CLASSIFY_DROP;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ gr0 = gbp_recirc_get (sw_if_index0);
+ fib_index0 = gr0->gr_fib_index[fproto];
+
+ if (FIB_PROTOCOL_IP4 == fproto)
+ {
+ ip4_0 = vlib_buffer_get_current (b0);
+ lbi0 = ip4_fib_forwarding_lookup (fib_index0,
+ &ip4_0->src_address);
+ }
+ else
+ {
+ ip6_0 = vlib_buffer_get_current (b0);
+ lbi0 = ip6_fib_table_fwding_lookup (&ip6_main, fib_index0,
+ &ip6_0->src_address);
+ }
+
+ lb0 = load_balance_get (lbi0);
+ dpo0 = load_balance_get_bucket_i (lb0, 0);
+
+ if (gbp_policy_dpo_type == dpo0->dpoi_type)
+ {
+ gpd0 = gbp_policy_dpo_get_i (dpo0->dpoi_index);
+ src_epg0 = gpd0->gpd_epg;
+ vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX],
+ &next0, b0);
+ }
+ else
+ {
+ /* could not classify => drop */
+ src_epg0 = 0;
+ }
+
+ vnet_buffer2 (b0)->gbp.src_epg = src_epg0;
+
+ if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ gbp_classify_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->src_epg = src_epg0;
+ }
+
+ 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;
+}
+
+static uword
+gbp_ip4_lpm_classify (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return (gbp_lpm_classify_inline (vm, node, frame, FIB_PROTOCOL_IP4));
+}
+
+static uword
+gbp_ip6_lpm_classify (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return (gbp_lpm_classify_inline (vm, node, frame, FIB_PROTOCOL_IP6));
+}
+
+ /* packet trace format function */
+static u8 *
+format_gbp_classify_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_classify_trace_t *t = va_arg (*args, gbp_classify_trace_t *);
+
+ s = format (s, "src-epg:%d", t->src_epg);
+
+ return s;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (gbp_ip4_lpm_classify_node) = {
+ .function = gbp_ip4_lpm_classify,
+ .name = "ip4-gbp-lpm-classify",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_classify_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = 0,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [GPB_LPM_CLASSIFY_DROP] = "ip4-drop"
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_ip4_lpm_classify_node, gbp_ip4_lpm_classify);
+
+VLIB_REGISTER_NODE (gbp_ip6_lpm_classify_node) = {
+ .function = gbp_ip6_lpm_classify,
+ .name = "ip6-gpb-lpm-classify",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_classify_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = 0,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [GPB_LPM_CLASSIFY_DROP] = "ip6-drop"
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_ip6_lpm_classify_node, gbp_ip6_lpm_classify);
+
+VNET_FEATURE_INIT (gbp_ip4_lpm_classify_feat_node, static) =
+{
+ .arc_name = "ip4-unicast",
+ .node_name = "ip4-gbp-lpm-classify",
+ .runs_before = VNET_FEATURES ("nat44-out2in"),
+};
+VNET_FEATURE_INIT (gbp_ip6_lpm_classify_feat_node, static) =
+{
+ .arc_name = "ip6-unicast",
+ .node_name = "ip6-gbp-lpm-classify",
+ .runs_before = VNET_FEATURES ("nat66-out2in"),
+};
+
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
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