mirror of
https://github.com/torvalds/linux
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236 lines
4.8 KiB
C
236 lines
4.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2021 Taehee Yoo <ap420073@gmail.com>
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*/
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#ifndef _NET_AMT_H_
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#define _NET_AMT_H_
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#include <linux/siphash.h>
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#include <linux/jhash.h>
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enum amt_msg_type {
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AMT_MSG_DISCOVERY = 1,
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AMT_MSG_ADVERTISEMENT,
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AMT_MSG_REQUEST,
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AMT_MSG_MEMBERSHIP_QUERY,
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AMT_MSG_MEMBERSHIP_UPDATE,
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AMT_MSG_MULTICAST_DATA,
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AMT_MSG_TEARDOWM,
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__AMT_MSG_MAX,
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};
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#define AMT_MSG_MAX (__AMT_MSG_MAX - 1)
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enum amt_status {
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AMT_STATUS_INIT,
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AMT_STATUS_SENT_DISCOVERY,
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AMT_STATUS_RECEIVED_DISCOVERY,
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AMT_STATUS_SENT_ADVERTISEMENT,
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AMT_STATUS_RECEIVED_ADVERTISEMENT,
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AMT_STATUS_SENT_REQUEST,
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AMT_STATUS_RECEIVED_REQUEST,
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AMT_STATUS_SENT_QUERY,
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AMT_STATUS_RECEIVED_QUERY,
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AMT_STATUS_SENT_UPDATE,
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AMT_STATUS_RECEIVED_UPDATE,
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__AMT_STATUS_MAX,
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};
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#define AMT_STATUS_MAX (__AMT_STATUS_MAX - 1)
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struct amt_header_discovery {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u32 type:4,
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version:4,
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reserved:24;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u32 version:4,
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type:4,
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reserved:24;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be32 nonce;
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} __packed;
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struct amt_header_advertisement {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u32 type:4,
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version:4,
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reserved:24;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u32 version:4,
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type:4,
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reserved:24;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be32 nonce;
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__be32 ip4;
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} __packed;
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struct amt_header_request {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u32 type:4,
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version:4,
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reserved1:7,
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p:1,
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reserved2:16;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u32 version:4,
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type:4,
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p:1,
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reserved1:7,
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reserved2:16;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be32 nonce;
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} __packed;
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struct amt_header_membership_query {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u64 type:4,
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version:4,
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reserved:6,
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l:1,
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g:1,
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response_mac:48;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u64 version:4,
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type:4,
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g:1,
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l:1,
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reserved:6,
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response_mac:48;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be32 nonce;
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} __packed;
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struct amt_header_membership_update {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u64 type:4,
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version:4,
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reserved:8,
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response_mac:48;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u64 version:4,
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type:4,
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reserved:8,
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response_mac:48;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be32 nonce;
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} __packed;
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struct amt_header_mcast_data {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u16 type:4,
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version:4,
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reserved:8;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u16 version:4,
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type:4,
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reserved:8;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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} __packed;
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struct amt_gw_headers {
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union {
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struct amt_header_discovery discovery;
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struct amt_header_request request;
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struct amt_header_membership_update update;
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};
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} __packed;
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struct amt_relay_headers {
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union {
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struct amt_header_advertisement advertisement;
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struct amt_header_membership_query query;
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struct amt_header_mcast_data data;
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};
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} __packed;
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struct amt_dev {
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struct net_device *dev;
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struct net_device *stream_dev;
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struct net *net;
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/* Global lock for amt device */
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spinlock_t lock;
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/* Used only in relay mode */
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struct list_head tunnel_list;
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struct gro_cells gro_cells;
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/* Protected by RTNL */
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struct delayed_work discovery_wq;
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/* Protected by RTNL */
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struct delayed_work req_wq;
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/* Protected by RTNL */
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struct delayed_work secret_wq;
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/* AMT status */
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enum amt_status status;
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/* Generated key */
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siphash_key_t key;
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struct socket __rcu *sock;
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u32 max_groups;
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u32 max_sources;
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u32 hash_buckets;
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u32 hash_seed;
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/* Default 128 */
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u32 max_tunnels;
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/* Default 128 */
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u32 nr_tunnels;
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/* Gateway or Relay mode */
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u32 mode;
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/* Default 2268 */
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__be16 relay_port;
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/* Default 2268 */
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__be16 gw_port;
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/* Outer local ip */
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__be32 local_ip;
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/* Outer remote ip */
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__be32 remote_ip;
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/* Outer discovery ip */
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__be32 discovery_ip;
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/* Only used in gateway mode */
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__be32 nonce;
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/* Gateway sent request and received query */
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bool ready4;
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bool ready6;
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u8 req_cnt;
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u8 qi;
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u64 qrv;
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u64 qri;
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/* Used only in gateway mode */
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u64 mac:48,
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reserved:16;
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};
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#define AMT_MAX_GROUP 32
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#define AMT_MAX_SOURCE 128
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#define AMT_HSIZE_SHIFT 8
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#define AMT_HSIZE (1 << AMT_HSIZE_SHIFT)
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#define AMT_INIT_QUERY_INTERVAL 125
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#define IANA_AMT_UDP_PORT 2268
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#define AMT_MAX_TUNNELS 128
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#define AMT_MAX_REQS 128
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#define AMT_GW_HLEN (sizeof(struct iphdr) + \
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sizeof(struct udphdr) + \
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sizeof(struct amt_gw_headers))
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#define AMT_RELAY_HLEN (sizeof(struct iphdr) + \
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sizeof(struct udphdr) + \
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sizeof(struct amt_relay_headers))
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static inline bool netif_is_amt(const struct net_device *dev)
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{
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return dev->rtnl_link_ops && !strcmp(dev->rtnl_link_ops->kind, "amt");
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}
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#endif /* _NET_AMT_H_ */
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