--- /dev/null
+/*
+ * 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.
+ */
+#ifndef __included_vxlan_gbp_packet_h__
+#define __included_vxlan_gbp_packet_h__ 1
+
+#include <vlib/vlib.h>
+
+/*
+ * From draft-smith-vxlan-group-policy-04.txt
+ *
+ * 0 1 2 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |G|R|R|R|I|R|R|R|R|D|E|S|A|R|R|R| Group Policy ID |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | VXLAN Network Identifier (VNI) | Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * G bit: Bit 0 of the initial word is defined as the G (Group Based
+ * Policy Extension) bit.
+ *
+ * I bit: where the I flag MUST be set to 1 for a valid
+ * VXLAN Network ID (VNI).
+ *
+ * D bit: Bit 9 of the initial word is defined as the Don't Learn bit.
+ * When set, this bit indicates that the egress VTEP MUST NOT learn the
+ * source address of the encapsulated frame.
+ *
+ * E bit: Bit 10 of the initial word is defined as the bounce packet.
+ * When set, this bit indicates that packet is bounced and must be
+ * dropped.
+ *
+ * S bit: Bit 11 of the initial word is defined as the source policy
+ * applied bit.
+ *
+ * A bit: Bit 12 of the initial word is defined as the A (Policy
+ * Applied) bit. This bit is only defined as the A bit when the G bit
+ * is set to 1.
+ *
+ * A = 1 indicates that the group policy has already been applied to
+ * this packet. Policies MUST NOT be applied by devices when the A
+ * bit is set.
+ *
+ * A = 0 indicates that the group policy has not been applied to this
+ * packet. Group policies MUST be applied by devices when the A bit
+ * is set to 0 and the destination Group has been determined.
+ * Devices that apply the Group policy MUST set the A bit to 1 after
+ * the policy has been applied.
+ *
+ * Group Policy ID: 16 bit identifier that indicates the source TSI
+ * Group membership being encapsulated by VXLAN. Its value is source
+ * class id.
+ *
+ * FOR INTERNAL USE ONLY
+ * R bit: Bit 12 of the initial word is defined as the reflection bit
+ * Set on packet rx checked on tx and dropped if set. this prevents
+ * packets recieved on an iVXLAN tunnel being reflected back to
+ * another.
+ */
+
+typedef struct
+{
+ union
+ {
+ struct
+ {
+ union
+ {
+ struct
+ {
+ u8 flag_g_i;
+ u8 gpflags;
+ };
+ u16 flags;
+ };
+ u16 sclass;
+ };
+ u32 flags_sclass_as_u32;
+ };
+ u32 vni_reserved;
+} vxlan_gbp_header_t;
+
+#define foreach_vxlan_gbp_flags \
+ _ (0x80, G) \
+ _ (0x08, I)
+
+typedef enum
+{
+ VXLAN_GBP_FLAGS_NONE = 0,
+#define _(n,f) VXLAN_GBP_FLAGS_##f = n,
+ foreach_vxlan_gbp_flags
+#undef _
+} __attribute__ ((packed)) vxlan_gbp_flags_t;
+
+#define VXLAN_GBP_FLAGS_GI (VXLAN_GBP_FLAGS_G|VXLAN_GBP_FLAGS_I)
+
+#define foreach_vxlan_gbp_gpflags \
+_ (0x40, D) \
+_ (0x20, E) \
+_ (0x10, S) \
+_ (0x08, A) \
+_ (0x04, R)
+
+typedef enum
+{
+ VXLAN_GBP_GPFLAGS_NONE = 0,
+#define _(n,f) VXLAN_GBP_GPFLAGS_##f = n,
+ foreach_vxlan_gbp_gpflags
+#undef _
+} __attribute__ ((packed)) vxlan_gbp_gpflags_t;
+
+static inline u32
+vxlan_gbp_get_vni (vxlan_gbp_header_t * h)
+{
+ u32 vni_reserved_host_byte_order;
+
+ vni_reserved_host_byte_order = clib_net_to_host_u32 (h->vni_reserved);
+ return vni_reserved_host_byte_order >> 8;
+}
+
+static inline u16
+vxlan_gbp_get_sclass (vxlan_gbp_header_t * h)
+{
+ u16 sclass_host_byte_order;
+
+ sclass_host_byte_order = clib_net_to_host_u16 (h->sclass);
+ return sclass_host_byte_order;
+}
+
+static inline vxlan_gbp_gpflags_t
+vxlan_gbp_get_gpflags (vxlan_gbp_header_t * h)
+{
+ return h->gpflags;
+}
+
+static inline vxlan_gbp_flags_t
+vxlan_gbp_get_flags (vxlan_gbp_header_t * h)
+{
+ return h->flag_g_i;
+}
+
+static inline void
+vxlan_gbp_set_header (vxlan_gbp_header_t * h, u32 vni)
+{
+ h->vni_reserved = clib_host_to_net_u32 (vni << 8);
+ h->flags_sclass_as_u32 = 0;
+ h->flag_g_i = VXLAN_GBP_FLAGS_I | VXLAN_GBP_FLAGS_G;
+}
+
+extern u8 *format_vxlan_gbp_header_flags (u8 * s, va_list * args);
+extern u8 *format_vxlan_gbp_header_gpflags (u8 * s, va_list * args);
+
+#endif /* __included_vxlan_gbp_packet_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff