diff options
Diffstat (limited to 'extras/deprecated/plugins/gbp/gbp_classify_node.c')
| -rw-r--r-- | extras/deprecated/plugins/gbp/gbp_classify_node.c | 628 |
1 files changed, 628 insertions, 0 deletions
diff --git a/extras/deprecated/plugins/gbp/gbp_classify_node.c b/extras/deprecated/plugins/gbp/gbp_classify_node.c new file mode 100644 index 00000000000..a2058a21284 --- /dev/null +++ b/extras/deprecated/plugins/gbp/gbp_classify_node.c @@ -0,0 +1,628 @@ +/* + * 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: + */ |