--- /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_classify.h>
+#include <plugins/gbp/gbp_policy.h>
+#include <plugins/gbp/gbp_policy_dpo.h>
+#include <plugins/gbp/gbp_bridge_domain.h>
+#include <plugins/gbp/gbp_ext_itf.h>
+#include <plugins/gbp/gbp_contract.h>
+
+#include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
+#include <vnet/vxlan-gbp/vxlan_gbp.h>
+
+typedef enum
+{
+ GBP_POLICY_NEXT_DROP,
+ GBP_POLICY_N_NEXT,
+} gbp_policy_next_t;
+
+always_inline dpo_proto_t
+ethertype_to_dpo_proto (u16 etype)
+{
+ etype = clib_net_to_host_u16 (etype);
+
+ switch (etype)
+ {
+ case ETHERNET_TYPE_IP4:
+ return (DPO_PROTO_IP4);
+ case ETHERNET_TYPE_IP6:
+ return (DPO_PROTO_IP6);
+ }
+
+ return (DPO_PROTO_NONE);
+}
+
+always_inline u32
+gbp_rule_l2_redirect (const gbp_rule_t * gu, vlib_buffer_t * b0)
+{
+ const ethernet_header_t *eth0;
+ const dpo_id_t *dpo;
+ dpo_proto_t dproto;
+
+ eth0 = vlib_buffer_get_current (b0);
+ /* pop the ethernet header to prepare for L3 rewrite */
+ vlib_buffer_advance (b0, vnet_buffer (b0)->l2.l2_len);
+
+ dproto = ethertype_to_dpo_proto (eth0->type);
+ dpo = &gu->gu_dpo[GBP_POLICY_NODE_L2][dproto];
+
+ /* save the LB index for the next node and reset the IP flow hash
+ * so it's recalculated */
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
+ vnet_buffer (b0)->ip.flow_hash = 0;
+
+ return (dpo->dpoi_next_node);
+}
+
+static_always_inline gbp_policy_next_t
+gbp_policy_l2_feature_next (gbp_policy_main_t * gpm, vlib_buffer_t * b,
+ const gbp_policy_type_t type)
+{
+ u32 feat_bit;
+
+ switch (type)
+ {
+ case GBP_POLICY_PORT:
+ feat_bit = L2OUTPUT_FEAT_GBP_POLICY_PORT;
+ break;
+ case GBP_POLICY_MAC:
+ feat_bit = L2OUTPUT_FEAT_GBP_POLICY_MAC;
+ break;
+ case GBP_POLICY_LPM:
+ feat_bit = L2OUTPUT_FEAT_GBP_POLICY_LPM;
+ break;
+ default:
+ return GBP_POLICY_NEXT_DROP;
+ }
+
+ return vnet_l2_feature_next (b, gpm->l2_output_feat_next[type], feat_bit);
+}
+
+static uword
+gbp_policy_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, const gbp_policy_type_t type)
+{
+ gbp_main_t *gm = &gbp_main;
+ gbp_policy_main_t *gpm = &gbp_policy_main;
+ u32 n_left_from, *from, *to_next;
+ u32 next_index;
+ u32 n_allow_intra, n_allow_a_bit, n_allow_sclass_1;
+
+ next_index = 0;
+ n_left_from = frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+ n_allow_intra = n_allow_a_bit = n_allow_sclass_1 = 0;
+
+ 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_rule_action_t action0 = GBP_RULE_DENY;
+ const ethernet_header_t *h0;
+ const gbp_endpoint_t *ge0;
+ gbp_contract_error_t err0;
+ u32 acl_match = ~0, rule_match = ~0;
+ gbp_policy_next_t next0;
+ gbp_contract_key_t key0;
+ u32 bi0, sw_if_index0;
+ vlib_buffer_t *b0;
+ gbp_rule_t *rule0;
+
+ next0 = GBP_POLICY_NEXT_DROP;
+ 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);
+ h0 = vlib_buffer_get_current (b0);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+
+ /*
+ * Reflection check; in and out on an ivxlan tunnel
+ */
+ if ((~0 != vxlan_gbp_tunnel_by_sw_if_index (sw_if_index0)) &&
+ (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_R))
+ {
+ goto trace;
+ }
+
+ /*
+ * If the A-bit is set then policy has already been applied
+ * and we skip enforcement here.
+ */
+ if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A)
+ {
+ next0 = gbp_policy_l2_feature_next (gpm, b0, type);
+ n_allow_a_bit++;
+ key0.as_u64 = ~0;
+ goto trace;
+ }
+
+ /*
+ * determine the src and dst EPG
+ */
+
+ /* zero out the key to ensure the pad space is clear */
+ key0.as_u64 = 0;
+ key0.gck_src = vnet_buffer2 (b0)->gbp.sclass;
+ key0.gck_dst = SCLASS_INVALID;
+
+ if (GBP_POLICY_LPM == type)
+ {
+ const ip4_address_t *ip4 = 0;
+ const ip6_address_t *ip6 = 0;
+ const dpo_proto_t proto =
+ gbp_classify_get_ip_address (h0, &ip4, &ip6,
+ GBP_CLASSIFY_GET_IP_DST);
+ if (PREDICT_TRUE (DPO_PROTO_NONE != proto))
+ {
+ const gbp_ext_itf_t *ext_itf =
+ gbp_ext_itf_get (sw_if_index0);
+ const gbp_policy_dpo_t *gpd =
+ gbp_classify_get_gpd (ip4, ip6,
+ ext_itf->gx_fib_index[proto]);
+ if (gpd)
+ key0.gck_dst = gpd->gpd_sclass;
+ }
+ }
+ else
+ {
+ if (GBP_POLICY_PORT == type)
+ ge0 = gbp_endpoint_find_itf (sw_if_index0);
+ else
+ ge0 = gbp_endpoint_find_mac (h0->dst_address,
+ vnet_buffer (b0)->l2.bd_index);
+ if (NULL != ge0)
+ key0.gck_dst = ge0->ge_fwd.gef_sclass;
+ }
+
+ if (SCLASS_INVALID == key0.gck_dst)
+ {
+ /* If you cannot determine the destination EP then drop */
+ b0->error = node->errors[GBP_CONTRACT_ERROR_DROP_NO_DCLASS];
+ goto trace;
+ }
+
+ key0.gck_src = vnet_buffer2 (b0)->gbp.sclass;
+ if (SCLASS_INVALID == key0.gck_src)
+ {
+ /*
+ * the src EPG is not set when the packet arrives on an EPG
+ * uplink interface and we do not need to apply policy
+ */
+ next0 = gbp_policy_l2_feature_next (gpm, b0, type);
+ goto trace;
+ }
+
+ key0.gck_scope =
+ gbp_bridge_domain_get_scope (vnet_buffer (b0)->l2.bd_index);
+
+ action0 =
+ gbp_contract_apply (vm, gm, &key0, b0, &rule0, &n_allow_intra,
+ &n_allow_sclass_1, &acl_match, &rule_match,
+ &err0, GBP_CONTRACT_APPLY_L2);
+ switch (action0)
+ {
+ case GBP_RULE_PERMIT:
+ next0 = gbp_policy_l2_feature_next (gpm, b0, type);
+ vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
+ break;
+ case GBP_RULE_REDIRECT:
+ next0 = gbp_rule_l2_redirect (rule0, b0);
+ vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
+ break;
+ case GBP_RULE_DENY:
+ next0 = GBP_POLICY_NEXT_DROP;
+ b0->error = node->errors[err0];
+ break;
+ }
+
+ trace:
+ gbp_policy_trace (vm, node, b0, &key0, action0, acl_match,
+ rule_match);
+
+ /* 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);
+ }
+
+ vlib_node_increment_counter (vm, node->node_index,
+ GBP_CONTRACT_ERROR_ALLOW_INTRA, n_allow_intra);
+ vlib_node_increment_counter (vm, node->node_index,
+ GBP_CONTRACT_ERROR_ALLOW_A_BIT, n_allow_a_bit);
+ vlib_node_increment_counter (vm, node->node_index,
+ GBP_CONTRACT_ERROR_ALLOW_SCLASS_1,
+ n_allow_sclass_1);
+
+ return frame->n_vectors;
+}
+
+VLIB_NODE_FN (gbp_policy_port_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return (gbp_policy_inline (vm, node, frame, GBP_POLICY_PORT));
+}
+
+VLIB_NODE_FN (gbp_policy_mac_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return (gbp_policy_inline (vm, node, frame, GBP_POLICY_MAC));
+}
+
+VLIB_NODE_FN (gbp_policy_lpm_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return (gbp_policy_inline (vm, node, frame, GBP_POLICY_LPM));
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (gbp_policy_port_node) = {
+ .name = "gbp-policy-port",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_policy_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(gbp_contract_error_strings),
+ .error_strings = gbp_contract_error_strings,
+
+ .n_next_nodes = GBP_POLICY_N_NEXT,
+ .next_nodes = {
+ [GBP_POLICY_NEXT_DROP] = "error-drop",
+ },
+};
+
+VLIB_REGISTER_NODE (gbp_policy_mac_node) = {
+ .name = "gbp-policy-mac",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_policy_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(gbp_contract_error_strings),
+ .error_strings = gbp_contract_error_strings,
+
+ .n_next_nodes = GBP_POLICY_N_NEXT,
+ .next_nodes = {
+ [GBP_POLICY_NEXT_DROP] = "error-drop",
+ },
+};
+
+VLIB_REGISTER_NODE (gbp_policy_lpm_node) = {
+ .name = "gbp-policy-lpm",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_policy_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(gbp_contract_error_strings),
+ .error_strings = gbp_contract_error_strings,
+
+ .n_next_nodes = GBP_POLICY_N_NEXT,
+ .next_nodes = {
+ [GBP_POLICY_NEXT_DROP] = "error-drop",
+ },
+};
+
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff