diff options
Diffstat (limited to 'extras/deprecated/plugins/gbp/gbp_policy_node.c')
| -rw-r--r-- | extras/deprecated/plugins/gbp/gbp_policy_node.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/extras/deprecated/plugins/gbp/gbp_policy_node.c b/extras/deprecated/plugins/gbp/gbp_policy_node.c new file mode 100644 index 00000000000..8c6ef5c2b94 --- /dev/null +++ b/extras/deprecated/plugins/gbp/gbp_policy_node.c @@ -0,0 +1,341 @@ +/* + * 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: + */ |