+++ /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