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authorMohsin Kazmi <sykazmi@cisco.com>2018-08-20 18:32:39 +0200
committerNeale Ranns <nranns@cisco.com>2018-09-10 12:38:30 +0000
commit61b94c6bc417dbcb11323962b40493e6f7ec2f7e (patch)
treeaa10b1e25de448b4ea13eaf00c4f3e1e98833dc6 /src/vnet/vxlan-gbp/vxlan_gbp_packet.h
parentb414d0d23aff66f793c018a75d83af4d29fb1bd4 (diff)
vxlan-gbp: Add support for vxlan gbp
This patch implements vxlan with extension of group based policy support. Change-Id: I70405bf7332c02867286da8958d9652837edd3c2 Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src/vnet/vxlan-gbp/vxlan_gbp_packet.h')
-rw-r--r--src/vnet/vxlan-gbp/vxlan_gbp_packet.h150
1 files changed, 150 insertions, 0 deletions
diff --git a/src/vnet/vxlan-gbp/vxlan_gbp_packet.h b/src/vnet/vxlan-gbp/vxlan_gbp_packet.h
new file mode 100644
index 00000000000..e1674a0dba8
--- /dev/null
+++ b/src/vnet/vxlan-gbp/vxlan_gbp_packet.h
@@ -0,0 +1,150 @@
+/*
+ * 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
+
+/*
+ * 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.
+ *
+ */
+
+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 VXLAN_GBP_FLAGS_G 0x80
+#define VXLAN_GBP_FLAGS_I 0x08
+
+#define foreach_vxlan_gbp_gpflags \
+_ (0x40, D) \
+_ (0x20, E) \
+_ (0x10, S) \
+_ (0x08, A)
+
+typedef enum
+{
+#define _(n,f) VXLAN_GBP_GPFLAGS_##f = n,
+ foreach_vxlan_gbp_gpflags
+#undef _
+} vxlan_gbp_gpflag_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 u8
+vxlan_gbp_get_gpflags (vxlan_gbp_header_t * h)
+{
+ return h->gpflags;
+}
+
+static inline u8
+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;
+}
+
+#endif /* __included_vxlan_gbp_packet_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */