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authorMarco Varlese <marco.varlese@suse.com>2017-09-19 14:25:28 +0200
committerDamjan Marion <dmarion.lists@gmail.com>2017-10-06 08:51:09 +0000
commitb598f1d3d7d4ace9a29c01d93a8d1ba616a91e15 (patch)
tree25f408f1255c61138499d146f66da27d390c7cbd /src/vnet/geneve/geneve_packet.h
parent4e5ceefb5522cfde1e916d84b56c318ec1ea614e (diff)
Initial GENEVE TUNNEL implementation and tests.
Notes on this first implementation: * First version of the implementation does NOT support GENEVE OPTIONS HEADER: it isn't well understood what the purpose of the OPTIONS will be and/or what content would be placed in the variable option data; Once the IETF work will evolve and further information will be available it could be possible to modify the frame rewrite to contemplate the actual GENEVE OPTIONS. Change-Id: Iddfe6f408cc45bb0800f00ce6a3e302e48a4ed52 Signed-off-by: Marco Varlese <marco.varlese@suse.com>
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diff --git a/src/vnet/geneve/geneve_packet.h b/src/vnet/geneve/geneve_packet.h
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+/*
+ * 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
+
+typedef struct
+{
+ u16 opt_class;
+ u8 type;
+ u8 res:3;
+ u8 length:5;
+ 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
+{
+ u8 ver:2;
+ u8 opt_len:6;
+ u8 oam_frame:1;
+ u8 critical_options:1;
+ u8 res1:6;
+ u16 protocol;
+ u32 vni:24;
+ u8 res2;
+ geneve_options_t opts[];
+} geneve_header_t;
+
+static inline u32
+vnet_get_geneve_vni (geneve_header_t * h)
+{
+ return (clib_net_to_host_u32 (h->vni) >> 8);
+}
+
+static inline void
+vnet_set_geneve_vni (geneve_header_t * h, u32 vni)
+{
+ h->vni = clib_host_to_net_u32 (vni << 8);
+}
+
+static inline u8
+vnet_get_geneve_version (geneve_header_t * h)
+{
+ return (clib_net_to_host_u32 (h->ver) >> 30);
+}
+
+static inline void
+vnet_set_geneve_version (geneve_header_t * h, u8 version)
+{
+ h->ver = clib_host_to_net_u32 (version << 30);
+}
+
+static inline u8
+vnet_get_geneve_options_len (geneve_header_t * h)
+{
+ return (clib_net_to_host_u32 (h->opt_len) >> 24);
+}
+
+static inline void
+vnet_set_geneve_options_len (geneve_header_t * h, u8 len)
+{
+ h->opt_len = clib_host_to_net_u32 (len << 24);
+}
+
+static inline u8
+vnet_get_geneve_oamframe_bit (geneve_header_t * h)
+{
+ return (clib_net_to_host_u32 (h->oam_frame) >> 23);
+}
+
+static inline void
+vnet_set_geneve_oamframe_bit (geneve_header_t * h, u8 oam)
+{
+ h->oam_frame = clib_host_to_net_u32 (oam << 23);
+}
+
+static inline u8
+vnet_get_geneve_critical_bit (geneve_header_t * h)
+{
+ return (clib_net_to_host_u32 (h->critical_options) >> 22);
+}
+
+static inline void
+vnet_set_geneve_critical_bit (geneve_header_t * h, u8 critical_opts)
+{
+ h->critical_options = clib_host_to_net_u32 (critical_opts << 22);
+}
+
+static inline u16
+vnet_get_geneve_protocol (geneve_header_t * h)
+{
+ return clib_net_to_host_u32 (h->protocol);
+}
+
+static inline void
+vnet_set_geneve_protocol (geneve_header_t * h, u16 protocol)
+{
+ h->protocol = clib_host_to_net_u32 (protocol);
+}
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */