+++ /dev/null
-/*
- * gbp.h : Group Based Policy
- *
- * 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_dpo.h>
-#include <plugins/gbp/gbp_ext_itf.h>
-#include <vnet/fib/ip4_fib.h>
-#include <vnet/fib/ip6_fib.h>
-#include <vnet/dpo/load_balance.h>
-#include <vnet/l2/l2_input.h>
-#include <vnet/l2/feat_bitmap.h>
-#include <vnet/fib/fib_table.h>
-#include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
-#include <vnet/ethernet/arp_packet.h>
-
-/**
- * per-packet trace data
- */
-typedef struct gbp_classify_trace_t_
-{
- /* per-pkt trace data */
- sclass_t sclass;
-} gbp_classify_trace_t;
-
-/*
- * determine the SRC EPG form the input port
- */
-always_inline uword
-gbp_classify_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- gbp_src_classify_type_t type, dpo_proto_t dproto)
-{
- gbp_src_classify_main_t *gscm = &gbp_src_classify_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)
- {
- u32 next0, bi0, sw_if_index0;
- const gbp_endpoint_t *ge0;
- vlib_buffer_t *b0;
- sclass_t sclass0;
-
- 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);
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- vnet_buffer2 (b0)->gbp.flags = VXLAN_GBP_GPFLAGS_NONE;
-
- if (GBP_SRC_CLASSIFY_NULL == type)
- {
- sclass0 = SCLASS_INVALID;
- next0 =
- vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type],
- L2INPUT_FEAT_GBP_NULL_CLASSIFY);
- }
- else
- {
- if (DPO_PROTO_ETHERNET == dproto)
- {
- const ethernet_header_t *h0;
-
- h0 = vlib_buffer_get_current (b0);
- next0 =
- vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type],
- L2INPUT_FEAT_GBP_SRC_CLASSIFY);
- ge0 = gbp_endpoint_find_mac (h0->src_address,
- vnet_buffer (b0)->l2.bd_index);
- }
- else if (DPO_PROTO_IP4 == dproto)
- {
- const ip4_header_t *h0;
-
- h0 = vlib_buffer_get_current (b0);
-
- ge0 = gbp_endpoint_find_ip4
- (&h0->src_address,
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0));
-
-
- /*
- * Go straight to looukp, do not pass go, do not collect $200
- */
- next0 = 0;
- }
- else if (DPO_PROTO_IP6 == dproto)
- {
- const ip6_header_t *h0;
-
- h0 = vlib_buffer_get_current (b0);
-
- ge0 = gbp_endpoint_find_ip6
- (&h0->src_address,
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6,
- sw_if_index0));
-
-
- /*
- * Go straight to lookup, do not pass go, do not collect $200
- */
- next0 = 0;
- }
- else
- {
- ge0 = NULL;
- next0 = 0;
- ASSERT (0);
- }
-
- if (PREDICT_TRUE (NULL != ge0))
- sclass0 = ge0->ge_fwd.gef_sclass;
- else
- sclass0 = SCLASS_INVALID;
- }
-
- vnet_buffer2 (b0)->gbp.sclass = sclass0;
-
- if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- gbp_classify_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sclass = sclass0;
- }
-
- 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;
-}
-
-VLIB_NODE_FN (gbp_src_classify_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return (gbp_classify_inline (vm, node, frame,
- GBP_SRC_CLASSIFY_PORT, DPO_PROTO_ETHERNET));
-}
-
-VLIB_NODE_FN (gbp_null_classify_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return (gbp_classify_inline (vm, node, frame,
- GBP_SRC_CLASSIFY_NULL, DPO_PROTO_ETHERNET));
-}
-
-VLIB_NODE_FN (gbp_ip4_src_classify_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return (gbp_classify_inline (vm, node, frame,
- GBP_SRC_CLASSIFY_PORT, DPO_PROTO_IP4));
-}
-
-VLIB_NODE_FN (gbp_ip6_src_classify_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return (gbp_classify_inline (vm, node, frame,
- GBP_SRC_CLASSIFY_PORT, DPO_PROTO_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, "sclass:%d", t->sclass);
-
- return s;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (gbp_null_classify_node) = {
- .name = "gbp-null-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_gbp_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = 0,
- .n_next_nodes = 0,
-};
-
-VLIB_REGISTER_NODE (gbp_src_classify_node) = {
- .name = "gbp-src-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_gbp_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = 0,
- .n_next_nodes = 0,
-};
-
-VLIB_REGISTER_NODE (gbp_ip4_src_classify_node) = {
- .name = "ip4-gbp-src-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 = {
- [0] = "ip4-lookup"
- },
-};
-
-VLIB_REGISTER_NODE (gbp_ip6_src_classify_node) = {
- .name = "ip6-gbp-src-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 = {
- [0] = "ip6-lookup"
- },
-};
-
-VNET_FEATURE_INIT (gbp_ip4_src_classify_feat_node, static) =
-{
- .arc_name = "ip4-unicast",
- .node_name = "ip4-gbp-src-classify",
- .runs_before = VNET_FEATURES ("nat44-out2in"),
-};
-VNET_FEATURE_INIT (gbp_ip6_src_classify_feat_node, static) =
-{
- .arc_name = "ip6-unicast",
- .node_name = "ip6-gbp-src-classify",
- .runs_before = VNET_FEATURES ("nat66-out2in"),
-};
-
-/* *INDENT-ON* */
-
-typedef enum gbp_lpm_classify_next_t_
-{
- GPB_LPM_CLASSIFY_DROP,
-} gbp_lpm_classify_next_t;
-
-/**
- * per-packet trace data
- */
-typedef struct gbp_lpm_classify_trace_t_
-{
- sclass_t sclass;
- index_t lbi;
- ip46_address_t src;
-} gbp_lpm_classify_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_gbp_lpm_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_lpm_classify_trace_t *t = va_arg (*args, gbp_lpm_classify_trace_t *);
-
- s = format (s, "sclass:%d lb:%d src:%U",
- t->sclass, t->lbi, format_ip46_address, &t->src, IP46_TYPE_ANY);
-
- return s;
-}
-
-enum gbp_lpm_type
-{
- GBP_LPM_RECIRC,
- GBP_LPM_EPG,
- GBP_LPM_ANON
-};
-
-/*
- * 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,
- const dpo_proto_t dproto,
- const enum gbp_lpm_type type)
-{
- gbp_src_classify_main_t *gscm = &gbp_src_classify_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)
- {
- u32 bi0, sw_if_index0, fib_index0, lbi0;
- const gbp_endpoint_t *ge0, *ge_lpm0;
- gbp_lpm_classify_next_t next0;
- const ethernet_header_t *eh0;
- const gbp_policy_dpo_t *gpd0;
- const ip4_address_t *ip4_0;
- const ip6_address_t *ip6_0;
- const gbp_recirc_t *gr0;
- vlib_buffer_t *b0;
- sclass_t sclass0;
-
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
- ip4_0 = NULL;
- ip6_0 = NULL;
- next0 = GPB_LPM_CLASSIFY_DROP;
-
- lbi0 = ~0;
- eh0 = NULL;
- b0 = vlib_get_buffer (vm, bi0);
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- vnet_buffer2 (b0)->gbp.flags = VXLAN_GBP_GPFLAGS_NONE;
-
- if (DPO_PROTO_IP4 == dproto)
- ip4_0 =
- &((ip4_header_t *) vlib_buffer_get_current (b0))->src_address;
- else if (DPO_PROTO_IP6 == dproto)
- ip6_0 =
- &((ip6_header_t *) vlib_buffer_get_current (b0))->src_address;
- else if (DPO_PROTO_ETHERNET == dproto)
- {
- eh0 = vlib_buffer_get_current (b0);
- gbp_classify_get_ip_address (eh0, &ip4_0, &ip6_0,
- GBP_CLASSIFY_GET_IP_SRC);
- }
-
- if (GBP_LPM_RECIRC == type)
- {
- gr0 = gbp_recirc_get (sw_if_index0);
- fib_index0 = gr0->gr_fib_index[dproto];
- ge0 = NULL;
-
- vnet_feature_next (&next0, b0);
- }
- else
- {
- if (NULL == eh0)
- {
- /* packet should be l2 */
- sclass0 = SCLASS_INVALID;
- goto trace;
- }
-
- if (GBP_LPM_ANON == type)
- {
- /*
- * anonymous LPM classification: only honour LPM as no EP
- * were programmed
- */
- gbp_ext_itf_t *gei = gbp_ext_itf_get (sw_if_index0);
- if (ip4_0)
- fib_index0 = gei->gx_fib_index[DPO_PROTO_IP4];
- else if (ip6_0)
- fib_index0 = gei->gx_fib_index[DPO_PROTO_IP6];
- else
- {
- /* not IP so no LPM classify possible */
- sclass0 = SCLASS_INVALID;
- next0 = GPB_LPM_CLASSIFY_DROP;
- goto trace;
- }
- next0 = vnet_l2_feature_next
- (b0, gscm->l2_input_feat_next[GBP_SRC_CLASSIFY_LPM_ANON],
- L2INPUT_FEAT_GBP_LPM_ANON_CLASSIFY);
- }
- else
- {
- /*
- * not an anonymous LPM classification: check it comes from
- * an EP, and use EP RD info
- */
- ge0 = gbp_endpoint_find_mac (eh0->src_address,
- vnet_buffer (b0)->l2.bd_index);
-
- if (NULL == ge0)
- {
- /* packet must have come from an EP's mac */
- sclass0 = SCLASS_INVALID;
- goto trace;
- }
-
- fib_index0 = ge0->ge_fwd.gef_fib_index;
-
- if (~0 == fib_index0)
- {
- sclass0 = SCLASS_INVALID;
- goto trace;
- }
-
- if (ip4_0)
- {
- ge_lpm0 = gbp_endpoint_find_ip4 (ip4_0, fib_index0);
- }
- else if (ip6_0)
- {
- ge_lpm0 = gbp_endpoint_find_ip6 (ip6_0, fib_index0);
- }
- else
- {
- ge_lpm0 = NULL;
- }
-
- next0 = vnet_l2_feature_next
- (b0, gscm->l2_input_feat_next[GBP_SRC_CLASSIFY_LPM],
- L2INPUT_FEAT_GBP_LPM_CLASSIFY);
-
- /*
- * if we found the EP by IP lookup, it must be from the EP
- * not a network behind it
- */
- if (NULL != ge_lpm0)
- {
- if (PREDICT_FALSE (ge0 != ge_lpm0))
- {
- /* an EP spoofing another EP */
- sclass0 = SCLASS_INVALID;
- next0 = GPB_LPM_CLASSIFY_DROP;
- }
- else
- {
- sclass0 = ge0->ge_fwd.gef_sclass;
- }
- goto trace;
- }
- }
- }
-
- gpd0 = gbp_classify_get_gpd (ip4_0, ip6_0, fib_index0);
- if (0 == gpd0)
- {
- /* could not classify => drop */
- sclass0 = SCLASS_INVALID;
- next0 = GPB_LPM_CLASSIFY_DROP;
- goto trace;
- }
-
- sclass0 = gpd0->gpd_sclass;
-
- /* all packets from an external network should not be learned by the
- * reciever. so set the Do-not-learn bit here */
- vnet_buffer2 (b0)->gbp.flags = VXLAN_GBP_GPFLAGS_D;
-
- trace:
- vnet_buffer2 (b0)->gbp.sclass = sclass0;
-
- if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- gbp_lpm_classify_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sclass = sclass0;
- t->lbi = lbi0;
- if (ip4_0)
- t->src.ip4 = *ip4_0;
- if (ip6_0)
- t->src.ip6 = *ip6_0;
- }
-
- 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;
-}
-
-VLIB_NODE_FN (gbp_ip4_lpm_classify_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return (gbp_lpm_classify_inline
- (vm, node, frame, DPO_PROTO_IP4, GBP_LPM_RECIRC));
-}
-
-VLIB_NODE_FN (gbp_ip6_lpm_classify_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return (gbp_lpm_classify_inline
- (vm, node, frame, DPO_PROTO_IP6, GBP_LPM_RECIRC));
-}
-
-VLIB_NODE_FN (gbp_l2_lpm_classify_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return (gbp_lpm_classify_inline
- (vm, node, frame, DPO_PROTO_ETHERNET, GBP_LPM_EPG));
-}
-
-VLIB_NODE_FN (gbp_l2_lpm_anon_classify_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return (gbp_lpm_classify_inline
- (vm, node, frame, DPO_PROTO_ETHERNET, GBP_LPM_ANON));
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (gbp_ip4_lpm_classify_node) = {
- .name = "ip4-gbp-lpm-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_gbp_lpm_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = 0,
- .n_next_nodes = 1,
- .next_nodes = {
- [GPB_LPM_CLASSIFY_DROP] = "ip4-drop"
- },
-};
-
-VLIB_REGISTER_NODE (gbp_ip6_lpm_classify_node) = {
- .name = "ip6-gbp-lpm-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_gbp_lpm_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = 0,
- .n_next_nodes = 1,
- .next_nodes = {
- [GPB_LPM_CLASSIFY_DROP] = "ip6-drop"
- },
-};
-
-VLIB_REGISTER_NODE (gbp_l2_lpm_classify_node) = {
- .name = "l2-gbp-lpm-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_gbp_lpm_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = 0,
- .n_next_nodes = 1,
- .next_nodes = {
- [GPB_LPM_CLASSIFY_DROP] = "error-drop"
- },
-};
-
-VLIB_REGISTER_NODE (gbp_l2_lpm_anon_classify_node) = {
- .name = "l2-gbp-lpm-anon-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_gbp_lpm_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = 0,
- .n_next_nodes = 1,
- .next_nodes = {
- [GPB_LPM_CLASSIFY_DROP] = "error-drop"
- },
-};
-
-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:
- */
Code Review / vpp.git / blobdiff