--- /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