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Diffstat (limited to 'extras/deprecated/vnet/vxlan-gbp/vxlan_gbp_packet.h')
| -rw-r--r-- | extras/deprecated/vnet/vxlan-gbp/vxlan_gbp_packet.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/extras/deprecated/vnet/vxlan-gbp/vxlan_gbp_packet.h b/extras/deprecated/vnet/vxlan-gbp/vxlan_gbp_packet.h new file mode 100644 index 00000000000..e655b333b89 --- /dev/null +++ b/extras/deprecated/vnet/vxlan-gbp/vxlan_gbp_packet.h @@ -0,0 +1,173 @@ +/* + * 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: + */ |