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+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * vnet/buffer.h: vnet buffer flags
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef included_vnet_buffer_h
+#define included_vnet_buffer_h
+
+#include <vlib/vlib.h>
+
+/* VLIB buffer flags for ip4/ip6 packets. Set by input interfaces for ip4/ip6
+ tcp/udp packets with hardware computed checksums. */
+#define LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED LOG2_VLIB_BUFFER_FLAG_USER(1)
+#define LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT LOG2_VLIB_BUFFER_FLAG_USER(2)
+#define IP_BUFFER_L4_CHECKSUM_COMPUTED (1 << LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED)
+#define IP_BUFFER_L4_CHECKSUM_CORRECT (1 << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT)
+
+#define LOG2_HGSHM_BUFFER_USER_INDEX_VALID LOG2_VLIB_BUFFER_FLAG_USER(3)
+#define VNET_HGSHM_BUFFER_USER_INDEX_VALID (1 << LOG2_HGSHM_BUFFER_USER_INDEX_VALID)
+
+#define foreach_buffer_opaque_union_subtype \
+_(ethernet) \
+_(ip) \
+_(mcast) \
+_(lb) \
+_(dlb) \
+_(swt) \
+_(l2) \
+_(l2t) \
+_(hgshm) \
+_(gre) \
+_(l2_classify) \
+_(io_handoff) \
+_(policer) \
+_(output_features)
+
+/*
+ * vnet stack buffer opaque array overlay structure.
+ * The vnet_buffer_opaque_t *must* be the same size as the
+ * vlib_buffer_t "opaque" structure member, 32 bytes.
+ *
+ * When adding a union type, please add a stanza to
+ * foreach_buffer_opaque_union_subtype (directly above).
+ * Code in vnet_interface_init(...) verifies the size
+ * of the union, and will announce any deviations in an
+ * impossible-to-miss manner.
+ */
+typedef struct {
+ u32 sw_if_index[VLIB_N_RX_TX];
+
+ union {
+ /* Ethernet. */
+ struct {
+ /* Saved value of current header by ethernet-input. */
+ i32 start_of_ethernet_header;
+ } ethernet;
+
+ /* IP4/6 buffer opaque. */
+ struct {
+ /* Adjacency from destination IP address lookup [VLIB_TX].
+ Adjacency from source IP address lookup [VLIB_RX].
+ This gets set to ~0 until source lookup is performed. */
+ u32 adj_index[VLIB_N_RX_TX];
+
+ union {
+ struct {
+ /* Current configuration index. */
+ u32 current_config_index;
+
+ /* Flow hash value for this packet computed from IP src/dst address
+ protocol and ports. */
+ u32 flow_hash;
+
+ /* next protocol */
+ u32 save_protocol;
+ };
+
+ /* Alternate used for local TCP packets. */
+ struct {
+ u32 listener_index;
+
+ u32 established_connection_index;
+
+ u32 mini_connection_index;
+ } tcp;
+ };
+ } ip;
+
+ /* Multicast replication */
+ struct {
+ u32 pad[3];
+ u32 mcast_group_index;
+ u32 mcast_current_index;
+ u32 original_free_list_index;
+ } mcast;
+
+ /* ipv6 shallow-pkt-inspection load-balancer, only valid there */
+ struct {
+ u8 lb_disable;
+ u8 user_to_network;
+ u8 was_injected;
+ u32 bucket_id;
+ } lb;
+ /* ipv4 DPI load-balancer, only valid there */
+ struct {
+ u8 lb_disable;
+ u8 user_to_network;
+ u32 session_index;
+ } dlb;
+
+ /* ip4-in-ip6 softwire termination, only valid there */
+ struct {
+ u8 swt_disable;
+ u32 mapping_index;
+ } swt;
+
+ /* l2 bridging path, only valid there */
+ struct {
+ u32 feature_bitmap;
+ u16 bd_index; // bridge-domain index
+ u8 l2_len; // ethernet header length
+ u8 shg; // split-horizon group
+ } l2;
+
+ /* l2tpv3 softwire encap, only valid there */
+ struct {
+ u32 pad[4]; /* do not overlay w/ ip.adj_index[0,1] */
+ u8 next_index;
+ u32 session_index;
+ } l2t;
+
+ /* hgshm, valid if packet sent through iface */
+ struct {
+ u32 pad[8 -VLIB_N_RX_TX -1]; /* to end of opaque */
+ u32 user_index; /* client id borrowing buffer */
+ } hgshm;
+
+ struct {
+ u32 src, dst;
+ } gre;
+
+ /* L2 classify */
+ struct {
+ u64 pad;
+ u32 opaque_index;
+ u32 table_index;
+ u64 hash;
+ } l2_classify;
+
+ /* IO - worker thread handoff */
+ struct {
+ u32 next_index;
+ } io_handoff;
+
+ /* vnet policer */
+ struct {
+ u32 pad[8 -VLIB_N_RX_TX -1]; /* to end of opaque */
+ u32 index;
+ } policer;
+
+ /* interface output features */
+ struct {
+ u32 ipsec_spd_index;
+ u32 ipsec_sad_index;
+ u32 unused[3];
+ u32 bitmap;
+ } output_features;
+
+ /* vcgn udp inside input, only valid there */
+ struct {
+ /* This part forms context of the packet. The structure should be
+ * exactly same as spp_ctx_t. Also this should be the first
+ * element of this vcgn_uii structure.
+ */
+ /****** BEGIN spp_ctx_t section ***********************/
+ union { /* Roddick specific */
+ u32 roddick_info;
+ struct _tx_pkt_info { /* Used by PI to PI communication for TX */
+ u32 uidb_index:16; /* uidb_index to transmit */
+ u32 packet_type:2; /* 1-IPv4, 2-Ipv6, - 0,3 - Unused */
+ u32 ipv4_defrag:1; /* 0 - Normal, 1 - update first
+ * segment size
+ * (set by 6rd defrag node)
+ */
+
+ u32 dst_ip_port_idx:4;/* Index to dst_ip_port_table */
+ u32 from_node:4;
+ u32 calc_chksum:1;
+ u32 reserved:4;
+ } tx;
+ struct _rx_pkt_info { /* Used by PD / PI communication */
+ u32 uidb_index:16; /* uidb_index received in packet */
+ u32 packet_type:2; /* 1-IPv4, 2-Ipv6, - 0,3 - Unused */
+ u32 icmp_type:1; /* 0-ICMP query type, 1-ICMP error type */
+ u32 protocol_type:2; /* 1-TCP, 2-UDP, 3-ICMP, 0 - Unused */
+ u32 ipv4_defrag:1; /* 0 - Normal, 1 - update first
+ * segment size
+ * (set by 6rd defrag node)
+ */
+
+ u32 direction:1; /* 0-Outside, 1-Inside */
+ u32 frag:1; /*IP fragment-1, Otherwise-0*/
+ u32 option:1; /* 0-No IP option (v4) present, non-fragHdr
+ * option hdr present (v6)
+ */
+ u32 df_bit:1; /* IPv4 DF bit copied here */
+ u32 reserved1:6;
+ } rx;
+ } ru;
+ /****** END spp_ctx_t section ***********************/
+
+ union {
+ struct {
+ u32 ipv4;
+ u16 port;
+ u16 vrf; //bit0-13:i/f, bit14-15:protocol
+ } k;
+
+ u64 key64;
+ } key;
+
+ u32 bucket;
+
+ u16 ovrf; /* Exit interface */
+ u8 frag_pkt;
+ u8 vcgn_unused1;
+ } vcgn_uii;
+
+ /* MAP */
+ struct {
+ u16 mtu;
+ } map;
+
+ /* MAP-T */
+ struct {
+ u32 map_domain_index;
+ struct {
+ u32 saddr, daddr;
+ u16 frag_offset; //Fragmentation header offset
+ u16 l4_offset; //L4 header overall offset
+ u8 l4_protocol; //The final protocol number
+ } v6; //Used by ip6_map_t only
+ u16 checksum_offset; //L4 checksum overall offset
+ u16 mtu; //Exit MTU
+ } map_t;
+
+ /* IP Fragmentation */
+ struct {
+ u16 header_offset;
+ u16 mtu;
+ u8 next_index;
+ u8 flags; //See ip_frag.h
+ } ip_frag;
+
+ u32 unused[6];
+ };
+} vnet_buffer_opaque_t;
+
+#define vnet_buffer(b) ((vnet_buffer_opaque_t *) (b)->opaque)
+
+/* Full cache line (64 bytes) of additional space */
+typedef struct {
+ union {
+ };
+} vnet_buffer_opaque2_t;
+
+
+
+#endif /* included_vnet_buffer_h */