*/
#include <plugins/gbp/gbp.h>
+#include <plugins/gbp/gbp_policy_dpo.h>
+
+#include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
/**
* Grouping of global data for the GBP source EPG classification feature
/**
* Next nodes for L2 output features
*/
- u32 l2_output_feat_next[32];
+ u32 l2_output_feat_next[2][32];
} gbp_policy_main_t;
static gbp_policy_main_t gbp_policy_main;
typedef struct gbp_policy_trace_t_
{
/* per-pkt trace data */
- epg_id_t src_epg;
- epg_id_t dst_epg;
+ u32 src_epg;
+ u32 dst_epg;
u32 acl_index;
+ u32 allowed;
} gbp_policy_trace_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);
+}
+
+always_inline u8
+gbp_policy_is_ethertype_allowed (const gbp_contract_t * gc0, u16 ethertype)
+{
+ u16 *et;
+
+ vec_foreach (et, gc0->gc_allowed_ethertypes)
+ {
+ if (*et == ethertype)
+ return (1);
+ }
+ return (0);
+}
+
static uword
-gbp_policy (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
+gbp_policy_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, u8 is_port_based)
{
gbp_main_t *gm = &gbp_main;
gbp_policy_main_t *gpm = &gbp_policy_main;
while (n_left_from > 0 && n_left_to_next > 0)
{
+ const ethernet_header_t *h0;
+ const gbp_endpoint_t *ge0;
+ const gbp_contract_t *gc0;
gbp_policy_next_t next0;
gbp_contract_key_t key0;
- gbp_contract_value_t value0 = {
- .as_u64 = ~0,
- };
u32 bi0, sw_if_index0;
vlib_buffer_t *b0;
+ index_t gci0;
+ gc0 = NULL;
next0 = GBP_POLICY_NEXT_DENY;
bi0 = from[0];
to_next[0] = bi0;
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];
+ /*
+ * If the A0bit is set then policy has already been applied
+ * and we skip enforcement here.
+ */
+ if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A)
+ {
+ next0 = vnet_l2_feature_next (b0,
+ gpm->l2_output_feat_next
+ [is_port_based],
+ (is_port_based ?
+ L2OUTPUT_FEAT_GBP_POLICY_PORT :
+ L2OUTPUT_FEAT_GBP_POLICY_MAC));
+ key0.as_u32 = ~0;
+ goto trace;
+ }
/*
* determine the src and dst EPG
*/
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- key0.gck_dst = gbp_port_to_epg (sw_if_index0);
+ if (is_port_based)
+ 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_epg_id;
+ else
+ /* If you cannot determine the destination EP then drop */
+ goto trace;
+
key0.gck_src = vnet_buffer2 (b0)->gbp.src_epg;
- if (~0 != key0.gck_src)
+ if (EPG_INVALID != key0.gck_src)
{
if (PREDICT_FALSE (key0.gck_src == key0.gck_dst))
{
/*
* intra-epg allowed
*/
- next0 = vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
- L2OUTPUT_FEAT_GBP_POLICY);
+ next0 =
+ vnet_l2_feature_next (b0,
+ gpm->l2_output_feat_next
+ [is_port_based],
+ (is_port_based ?
+ L2OUTPUT_FEAT_GBP_POLICY_PORT :
+ L2OUTPUT_FEAT_GBP_POLICY_MAC));
+ vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
}
else
{
- value0.as_u64 = gbp_acl_lookup (&key0);
+ gci0 = gbp_contract_find (&key0);
- if (~0 != value0.gc_lc_index)
+ if (INDEX_INVALID != gci0)
{
+ u32 rule_match_p0, trace_bitmap0;
fa_5tuple_opaque_t pkt_5tuple0;
- u8 action0 = 0;
u32 acl_pos_p0, acl_match_p0;
- u32 rule_match_p0, trace_bitmap0;
- u8 *h0, l2_len0;
+ u8 is_ip60, l2_len0, action0;
+ const gbp_rule_t *gu;
u16 ether_type0;
- u8 is_ip60 = 0;
+ const u8 *h0;
+ action0 = 0;
+ gc0 = gbp_contract_get (gci0);
l2_len0 = vnet_buffer (b0)->l2.l2_len;
h0 = vlib_buffer_get_current (b0);
- ether_type0 =
- clib_net_to_host_u16 (*(u16 *) (h0 + l2_len0 - 2));
-
- is_ip60 = (ether_type0 == ETHERNET_TYPE_IP6) ? 1 : 0;
- /*
- * tests against the ACL
- */
- acl_plugin_fill_5tuple_inline (gm->
- acl_plugin.p_acl_main,
- value0.gc_lc_index, b0,
- is_ip60,
- /* is_input */ 0,
- /* is_l2_path */ 1,
- &pkt_5tuple0);
- acl_plugin_match_5tuple_inline (gm->
- acl_plugin.p_acl_main,
- value0.gc_lc_index,
- &pkt_5tuple0, is_ip60,
- &action0, &acl_pos_p0,
- &acl_match_p0,
- &rule_match_p0,
- &trace_bitmap0);
-
- if (action0 > 0)
- next0 =
- vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
- L2OUTPUT_FEAT_GBP_POLICY);
+ ether_type0 = *(u16 *) (h0 + l2_len0 - 2);
+
+ if (!gbp_policy_is_ethertype_allowed (gc0, ether_type0))
+ {
+ /*
+ * black list model so drop
+ */
+ goto trace;
+ }
+
+ if ((ether_type0 ==
+ clib_net_to_host_u16 (ETHERNET_TYPE_IP6))
+ || (ether_type0 ==
+ clib_net_to_host_u16 (ETHERNET_TYPE_IP4)))
+ {
+ is_ip60 =
+ (ether_type0 ==
+ clib_net_to_host_u16 (ETHERNET_TYPE_IP6)) ? 1 :
+ 0;
+ /*
+ * tests against the ACL
+ */
+ acl_plugin_fill_5tuple_inline (gm->
+ acl_plugin.p_acl_main,
+ gc0->gc_lc_index, b0,
+ is_ip60,
+ /* is_input */ 0,
+ /* is_l2_path */ 1,
+ &pkt_5tuple0);
+ acl_plugin_match_5tuple_inline (gm->
+ acl_plugin.p_acl_main,
+ gc0->gc_lc_index,
+ &pkt_5tuple0,
+ is_ip60, &action0,
+ &acl_pos_p0,
+ &acl_match_p0,
+ &rule_match_p0,
+ &trace_bitmap0);
+
+ if (action0 > 0)
+ {
+ vnet_buffer2 (b0)->gbp.flags |=
+ VXLAN_GBP_GPFLAGS_A;
+ gu =
+ gbp_rule_get (gc0->gc_rules[rule_match_p0]);
+
+ switch (gu->gu_action)
+ {
+ case GBP_RULE_PERMIT:
+ next0 = vnet_l2_feature_next
+ (b0,
+ gpm->l2_output_feat_next
+ [is_port_based],
+ (is_port_based ?
+ L2OUTPUT_FEAT_GBP_POLICY_PORT :
+ L2OUTPUT_FEAT_GBP_POLICY_MAC));
+ break;
+ case GBP_RULE_DENY:
+ ASSERT (0);
+ next0 = 0;
+ break;
+ case GBP_RULE_REDIRECT:
+ next0 = gbp_rule_l2_redirect (gu, b0);
+ break;
+ }
+ }
+ }
}
}
}
* the src EPG is not set when the packet arrives on an EPG
* uplink interface and we do not need to apply policy
*/
- next0 = vnet_l2_feature_next (b0, gpm->l2_output_feat_next,
- L2OUTPUT_FEAT_GBP_POLICY);
+ next0 =
+ vnet_l2_feature_next (b0,
+ gpm->l2_output_feat_next[is_port_based],
+ (is_port_based ?
+ L2OUTPUT_FEAT_GBP_POLICY_PORT :
+ L2OUTPUT_FEAT_GBP_POLICY_MAC));
}
+ trace:
if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
{
gbp_policy_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->src_epg = key0.gck_src;
t->dst_epg = key0.gck_dst;
- t->acl_index = value0.gc_acl_index;
+ t->acl_index = (gc0 ? gc0->gc_acl_index : ~0),
+ t->allowed = (next0 != GBP_POLICY_NEXT_DENY);
}
/* verify speculative enqueue, maybe switch current next frame */
return frame->n_vectors;
}
+static uword
+gbp_policy_port (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return (gbp_policy_inline (vm, node, frame, 1));
+}
+
+static uword
+gbp_policy_mac (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return (gbp_policy_inline (vm, node, frame, 0));
+}
+
/* packet trace format function */
static u8 *
format_gbp_policy_trace (u8 * s, va_list * args)
gbp_policy_trace_t *t = va_arg (*args, gbp_policy_trace_t *);
s =
- format (s, "src:%d, dst:%d, acl:%d", t->src_epg, t->dst_epg,
- t->acl_index);
+ format (s, "src:%d, dst:%d, acl:%d allowed:%d",
+ t->src_epg, t->dst_epg, t->acl_index, t->allowed);
return s;
}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (gbp_policy_node) = {
- .function = gbp_policy,
- .name = "gbp-policy",
+VLIB_REGISTER_NODE (gbp_policy_port_node) = {
+ .function = gbp_policy_port,
+ .name = "gbp-policy-port",
.vector_size = sizeof (u32),
.format_trace = format_gbp_policy_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
},
};
-VLIB_NODE_FUNCTION_MULTIARCH (gbp_policy_node, gbp_policy);
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_policy_port_node, gbp_policy_port);
+
+VLIB_REGISTER_NODE (gbp_policy_mac_node) = {
+ .function = gbp_policy_mac,
+ .name = "gbp-policy-mac",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_policy_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .sibling_of = "gbp-policy-port",
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (gbp_policy_mac_node, gbp_policy_mac);
/* *INDENT-ON* */
/* Initialize the feature next-node indexes */
feat_bitmap_init_next_nodes (vm,
- gbp_policy_node.index,
+ gbp_policy_port_node.index,
+ L2OUTPUT_N_FEAT,
+ l2output_get_feat_names (),
+ gpm->l2_output_feat_next[1]);
+ feat_bitmap_init_next_nodes (vm,
+ gbp_policy_mac_node.index,
L2OUTPUT_N_FEAT,
l2output_get_feat_names (),
- gpm->l2_output_feat_next);
+ gpm->l2_output_feat_next[0]);
return error;
}
Code Review / vpp.git / blobdiff