GPB_LPM_CLASSIFY_DROP,
} gbp_lpm_classify_next_t;
-always_inline void
-gbp_classify_get_src_ip4_address (const ethernet_header_t * eh0,
- const ip4_address_t ** ip4)
-{
- const ip4_header_t *iph4;
-
- iph4 = (ip4_header_t *) (eh0 + 1);
- *ip4 = &iph4->src_address;
-}
-
-always_inline void
-gbp_classify_get_src_ip6_address (const ethernet_header_t * eh0,
- const ip6_address_t ** ip6)
-{
- const ip6_header_t *iph6;
-
- iph6 = (ip6_header_t *) (eh0 + 1);
- *ip6 = &iph6->src_address;
-}
-
-always_inline void
-gbp_classify_get_src_ip_address (const ethernet_header_t * eh0,
- const ip4_address_t ** ip4,
- const ip6_address_t ** ip6)
-{
- u16 etype = clib_net_to_host_u16 (eh0->type);
-
- switch (etype)
- {
- case ETHERNET_TYPE_IP4:
- gbp_classify_get_src_ip4_address (eh0, ip4);
- break;
- case ETHERNET_TYPE_IP6:
- gbp_classify_get_src_ip6_address (eh0, ip6);
- break;
- case ETHERNET_TYPE_VLAN:
- {
- ethernet_vlan_header_t *vh0;
-
- vh0 = (ethernet_vlan_header_t *) (eh0 + 1);
-
- switch (clib_net_to_host_u16 (vh0->type))
- {
- case ETHERNET_TYPE_IP4:
- {
- gbp_classify_get_src_ip4_address (eh0, ip4);
- break;
- case ETHERNET_TYPE_IP6:
- gbp_classify_get_src_ip6_address (eh0, ip6);
- break;
- }
- }
- break;
- }
- case ETHERNET_TYPE_ARP:
- {
- const ethernet_arp_header_t *ea0;
-
- ea0 = (ethernet_arp_header_t *) (eh0 + 1);
-
- *ip4 = &ea0->ip4_over_ethernet[0].ip4;
- break;
- }
- default:
- break;
- }
-}
-
/**
* per-packet trace data
*/
return s;
}
+enum gbp_lpm_type
+{
+ GBP_LPM_RECIRC,
+ GBP_LPM_EPG,
+ GBP_LPM_ANON
+};
+
/*
* Determine the SRC EPG from a LPM
*/
gbp_lpm_classify_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame,
- dpo_proto_t dproto, u8 is_recirc)
+ 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;
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_endpoint_t *ge0;
const gbp_recirc_t *gr0;
- const dpo_id_t *dpo0;
- load_balance_t *lb0;
vlib_buffer_t *b0;
sclass_t sclass0;
else if (DPO_PROTO_ETHERNET == dproto)
{
eh0 = vlib_buffer_get_current (b0);
- gbp_classify_get_src_ip_address (eh0, &ip4_0, &ip6_0);
+ gbp_classify_get_ip_address (eh0, &ip4_0, &ip6_0,
+ GBP_CLASSIFY_GET_IP_SRC);
}
- if (is_recirc)
+ if (GBP_LPM_RECIRC == type)
{
gr0 = gbp_recirc_get (sw_if_index0);
fib_index0 = gr0->gr_fib_index[dproto];
goto trace;
}
- 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)
+ if (GBP_LPM_ANON == type)
{
- ge0 = gbp_endpoint_find_ip4 (ip4_0, fib_index0);
+ /*
+ * 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 if (ip6_0)
+ else
{
- ge0 = gbp_endpoint_find_ip6 (ip6_0, fib_index0);
- }
+ /*
+ * 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);
- next0 = vnet_l2_feature_next
- (b0, gscm->l2_input_feat_next[GBP_SRC_CLASSIFY_LPM],
- L2INPUT_FEAT_GBP_LPM_CLASSIFY);
+ 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 != ge0)
- {
- sclass0 = ge0->ge_fwd.gef_sclass;
- goto trace;
+ /*
+ * 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;
+ }
}
}
- if (ip4_0)
- {
- lbi0 = ip4_fib_forwarding_lookup (fib_index0, ip4_0);
- }
- else if (ip6_0)
+ gpd0 = gbp_classify_get_gpd (ip4_0, ip6_0, fib_index0);
+ if (0 == gpd0)
{
- lbi0 =
- ip6_fib_table_fwding_lookup (&ip6_main, fib_index0, ip6_0);
- }
- else
- {
- /* not IP so no LPM classify possible */
+ /* could not classify => drop */
sclass0 = SCLASS_INVALID;
next0 = GPB_LPM_CLASSIFY_DROP;
goto trace;
}
- lb0 = load_balance_get (lbi0);
- dpo0 = load_balance_get_bucket_i (lb0, 0);
- if (gbp_policy_dpo_type == dpo0->dpoi_type)
- {
- gpd0 = gbp_policy_dpo_get (dpo0->dpoi_index);
- sclass0 = gpd0->gpd_sclass;
- }
- else
- {
- /* could not classify => drop */
- sclass0 = SCLASS_INVALID;
- 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;
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return (gbp_lpm_classify_inline (vm, node, frame, DPO_PROTO_IP4, 1));
+ 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, 1));
+ 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, 0));
+ 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_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",
Code Review / vpp.git / blobdiff