--- /dev/null
+/*
+ * Copyright (c) 2017 SUSE LLC.
+ * 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_vnet_geneve_packet_h
+#define included_vnet_geneve_packet_h
+
+/*
+ *
+ * As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
+ *
+ * Section 3.5
+ *
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Option Class | Type |R|R|R| Length |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Variable Option Data |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+#define GENEVE_MAX_OPT_LENGTH 128
+
+/*
+ *
+ * As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
+ *
+ * Section 7
+ *
+ * +----------------+--------------------------------------+
+ * | Option Class | Description |
+ * +----------------+--------------------------------------+
+ * | 0x0000..0x00FF | Unassigned - IETF Review |
+ * | 0x0100 | Linux |
+ * | 0x0101 | Open vSwitch |
+ * | 0x0102 | Open Virtual Networking (OVN) |
+ * | 0x0103 | In-band Network Telemetry (INT) |
+ * | 0x0104 | VMware |
+ * | 0x0105..0xFFEF | Unassigned - First Come First Served |
+ * | 0xFFF0..FFFF | Experimental |
+ * +----------------+--------------------------------------+
+*/
+#define LINUX_OPT_CLASS 0x0100
+#define OVS_OPT_CLASS 0x0101
+#define OVN_OPT_CLASS 0x0102
+#define INT_OPT_CLASS 0x0103
+#define VMWARE_OPT_CLASS 0x0104
+
+/*
+ * 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
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Option Class | Type |R|R|R| Length |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Variable Option Data |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+typedef struct
+{
+ u16 opt_class;
+ u8 type;
+ /* The 3 reserved bits are for future use;
+ * Need to be 0 on sending and ignored on receipt.
+ */
+ u8 res;
+ /* Length is expressed in 4-bytes multiples excluding the options header. */
+ u8 length;
+ u32 opt_data[];
+} geneve_options_t;
+
+/*
+ *
+ * As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
+ *
+ * Section 3/3.4
+ *
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |Ver| Opt Len |O|C| Rsvd. | Protocol Type |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Virtual Network Identifier (VNI) | Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Variable Length Options |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ */
+#define GENEVE_BASE_HEADER_LENGTH 8 // GENEVE BASE HEADER in bytes
+#define GENEVE_MAX_TOTAL_HDR_LENGTH 260
+
+#define GENEVE_VERSION 0
+#define GENEVE_ETH_PROTOCOL 0x6558
+
+typedef struct
+{
+ /*
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |Ver| Opt Len |O|C| Rsvd. | Protocol Type |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+ u32 first_word;
+
+ /*
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Virtual Network Identifier (VNI) | Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+ u32 vni_rsvd;
+ geneve_options_t opts[];
+} geneve_header_t;
+
+#define GENEVE_VERSION_SHIFT 30
+#define GENEVE_OPTLEN_SHIFT 24
+#define GENEVE_O_BIT_SHIFT 23
+#define GENEVE_C_BIT_SHIFT 22
+#define GENEVE_6_RESERVED_SHIFT 16
+#define GENEVE_VNI_SHIFT 8
+
+#define GENEVE_VERSION_MASK 0xC0000000
+#define GENEVE_OPTLEN_MASK 0x3F000000
+#define GENEVE_O_BIT_MASK 0x00800000
+#define GENEVE_C_BIT_MASK 0x00400000
+#define GENEVE_6_RESERVED_MASK 0x003F0000
+#define GENEVE_PROTOCOL_MASK 0x0000FFFF
+#define GENEVE_VNI_MASK 0xFFFFFF00
+
+/*
+ * Return the VNI in host-byte order
+ */
+static inline u32
+vnet_get_geneve_vni (geneve_header_t * h)
+{
+ return ((clib_net_to_host_u32 (h->vni_rsvd) & GENEVE_VNI_MASK) >>
+ GENEVE_VNI_SHIFT);
+}
+
+static inline u32
+vnet_get_geneve_vni_network_order (geneve_header_t * h)
+{
+ return (h->vni_rsvd & clib_net_to_host_u32 (GENEVE_VNI_MASK));
+}
+
+static inline void
+vnet_set_geneve_vni (geneve_header_t * h, u32 vni)
+{
+ h->vni_rsvd &= ~(GENEVE_VNI_MASK);
+ h->vni_rsvd |=
+ clib_host_to_net_u32 ((vni << GENEVE_VNI_SHIFT) & GENEVE_VNI_MASK);
+}
+
+static inline u8
+vnet_get_geneve_version (geneve_header_t * h)
+{
+ return ((h->first_word & GENEVE_VERSION_MASK) >> GENEVE_VERSION_SHIFT);
+}
+
+static inline void
+vnet_set_geneve_version (geneve_header_t * h, u8 version)
+{
+ h->first_word &= ~(GENEVE_VERSION_MASK);
+ h->first_word |= ((version << GENEVE_VERSION_SHIFT) & GENEVE_VERSION_MASK);
+}
+
+static inline u8
+vnet_get_geneve_options_len (geneve_header_t * h)
+{
+ return ((h->first_word & GENEVE_OPTLEN_MASK) >> GENEVE_OPTLEN_SHIFT);
+}
+
+static inline void
+vnet_set_geneve_options_len (geneve_header_t * h, u8 len)
+{
+ h->first_word &= ~(GENEVE_OPTLEN_MASK);
+ h->first_word |= ((len << GENEVE_OPTLEN_SHIFT) & GENEVE_OPTLEN_MASK);
+}
+
+static inline u8
+vnet_get_geneve_oamframe_bit (geneve_header_t * h)
+{
+ return ((h->first_word & GENEVE_O_BIT_MASK) >> GENEVE_O_BIT_SHIFT);
+}
+
+static inline void
+vnet_set_geneve_oamframe_bit (geneve_header_t * h, u8 oam)
+{
+ h->first_word &= ~(GENEVE_O_BIT_MASK);
+ h->first_word |= ((oam << GENEVE_O_BIT_SHIFT) & GENEVE_O_BIT_MASK);
+}
+
+static inline u8
+vnet_get_geneve_critical_bit (geneve_header_t * h)
+{
+ return ((h->first_word & GENEVE_C_BIT_MASK) >> GENEVE_C_BIT_SHIFT);
+}
+
+static inline void
+vnet_set_geneve_critical_bit (geneve_header_t * h, u8 critical_opts)
+{
+ h->first_word &= ~(GENEVE_C_BIT_MASK);
+ h->first_word |=
+ ((critical_opts << GENEVE_C_BIT_SHIFT) & GENEVE_C_BIT_MASK);
+}
+
+static inline u16
+vnet_get_geneve_protocol (geneve_header_t * h)
+{
+ return (h->first_word & GENEVE_PROTOCOL_MASK);
+}
+
+static inline void
+vnet_set_geneve_protocol (geneve_header_t * h, u16 protocol)
+{
+ h->first_word &= ~(GENEVE_PROTOCOL_MASK);
+ h->first_word |= (protocol & GENEVE_PROTOCOL_MASK);
+}
+
+static inline void
+vnet_geneve_hdr_1word_ntoh (geneve_header_t * h)
+{
+ h->first_word = clib_net_to_host_u32 (h->first_word);
+}
+
+static inline void
+vnet_geneve_hdr_1word_hton (geneve_header_t * h)
+{
+ h->first_word = clib_host_to_net_u32 (h->first_word);
+}
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff