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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /include/net/amt.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/net/amt.h')
-rw-r--r--include/net/amt.h408
1 files changed, 408 insertions, 0 deletions
diff --git a/include/net/amt.h b/include/net/amt.h
new file mode 100644
index 0000000000..c881bc8b67
--- /dev/null
+++ b/include/net/amt.h
@@ -0,0 +1,408 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2021 Taehee Yoo <ap420073@gmail.com>
+ */
+#ifndef _NET_AMT_H_
+#define _NET_AMT_H_
+
+#include <linux/siphash.h>
+#include <linux/jhash.h>
+#include <linux/netdevice.h>
+#include <net/gro_cells.h>
+#include <net/rtnetlink.h>
+
+enum amt_msg_type {
+ AMT_MSG_DISCOVERY = 1,
+ AMT_MSG_ADVERTISEMENT,
+ AMT_MSG_REQUEST,
+ AMT_MSG_MEMBERSHIP_QUERY,
+ AMT_MSG_MEMBERSHIP_UPDATE,
+ AMT_MSG_MULTICAST_DATA,
+ AMT_MSG_TEARDOWN,
+ __AMT_MSG_MAX,
+};
+
+#define AMT_MSG_MAX (__AMT_MSG_MAX - 1)
+
+enum amt_ops {
+ /* A*B */
+ AMT_OPS_INT,
+ /* A+B */
+ AMT_OPS_UNI,
+ /* A-B */
+ AMT_OPS_SUB,
+ /* B-A */
+ AMT_OPS_SUB_REV,
+ __AMT_OPS_MAX,
+};
+
+#define AMT_OPS_MAX (__AMT_OPS_MAX - 1)
+
+enum amt_filter {
+ AMT_FILTER_FWD,
+ AMT_FILTER_D_FWD,
+ AMT_FILTER_FWD_NEW,
+ AMT_FILTER_D_FWD_NEW,
+ AMT_FILTER_ALL,
+ AMT_FILTER_NONE_NEW,
+ AMT_FILTER_BOTH,
+ AMT_FILTER_BOTH_NEW,
+ __AMT_FILTER_MAX,
+};
+
+#define AMT_FILTER_MAX (__AMT_FILTER_MAX - 1)
+
+enum amt_act {
+ AMT_ACT_GMI,
+ AMT_ACT_GMI_ZERO,
+ AMT_ACT_GT,
+ AMT_ACT_STATUS_FWD_NEW,
+ AMT_ACT_STATUS_D_FWD_NEW,
+ AMT_ACT_STATUS_NONE_NEW,
+ __AMT_ACT_MAX,
+};
+
+#define AMT_ACT_MAX (__AMT_ACT_MAX - 1)
+
+enum amt_status {
+ AMT_STATUS_INIT,
+ AMT_STATUS_SENT_DISCOVERY,
+ AMT_STATUS_RECEIVED_DISCOVERY,
+ AMT_STATUS_SENT_ADVERTISEMENT,
+ AMT_STATUS_RECEIVED_ADVERTISEMENT,
+ AMT_STATUS_SENT_REQUEST,
+ AMT_STATUS_RECEIVED_REQUEST,
+ AMT_STATUS_SENT_QUERY,
+ AMT_STATUS_RECEIVED_QUERY,
+ AMT_STATUS_SENT_UPDATE,
+ AMT_STATUS_RECEIVED_UPDATE,
+ __AMT_STATUS_MAX,
+};
+
+#define AMT_STATUS_MAX (__AMT_STATUS_MAX - 1)
+
+/* Gateway events only */
+enum amt_event {
+ AMT_EVENT_NONE,
+ AMT_EVENT_RECEIVE,
+ AMT_EVENT_SEND_DISCOVERY,
+ AMT_EVENT_SEND_REQUEST,
+ __AMT_EVENT_MAX,
+};
+
+struct amt_header {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u8 type:4,
+ version:4;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u8 version:4,
+ type:4;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+} __packed;
+
+struct amt_header_discovery {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u32 type:4,
+ version:4,
+ reserved:24;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u32 version:4,
+ type:4,
+ reserved:24;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+ __be32 nonce;
+} __packed;
+
+struct amt_header_advertisement {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u32 type:4,
+ version:4,
+ reserved:24;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u32 version:4,
+ type:4,
+ reserved:24;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+ __be32 nonce;
+ __be32 ip4;
+} __packed;
+
+struct amt_header_request {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u32 type:4,
+ version:4,
+ reserved1:7,
+ p:1,
+ reserved2:16;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u32 version:4,
+ type:4,
+ p:1,
+ reserved1:7,
+ reserved2:16;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+ __be32 nonce;
+} __packed;
+
+struct amt_header_membership_query {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u64 type:4,
+ version:4,
+ reserved:6,
+ l:1,
+ g:1,
+ response_mac:48;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u64 version:4,
+ type:4,
+ g:1,
+ l:1,
+ reserved:6,
+ response_mac:48;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+ __be32 nonce;
+} __packed;
+
+struct amt_header_membership_update {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u64 type:4,
+ version:4,
+ reserved:8,
+ response_mac:48;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u64 version:4,
+ type:4,
+ reserved:8,
+ response_mac:48;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+ __be32 nonce;
+} __packed;
+
+struct amt_header_mcast_data {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ u16 type:4,
+ version:4,
+ reserved:8;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ u16 version:4,
+ type:4,
+ reserved:8;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+} __packed;
+
+struct amt_headers {
+ union {
+ struct amt_header_discovery discovery;
+ struct amt_header_advertisement advertisement;
+ struct amt_header_request request;
+ struct amt_header_membership_query query;
+ struct amt_header_membership_update update;
+ struct amt_header_mcast_data data;
+ };
+} __packed;
+
+struct amt_gw_headers {
+ union {
+ struct amt_header_discovery discovery;
+ struct amt_header_request request;
+ struct amt_header_membership_update update;
+ };
+} __packed;
+
+struct amt_relay_headers {
+ union {
+ struct amt_header_advertisement advertisement;
+ struct amt_header_membership_query query;
+ struct amt_header_mcast_data data;
+ };
+} __packed;
+
+struct amt_skb_cb {
+ struct amt_tunnel_list *tunnel;
+};
+
+struct amt_tunnel_list {
+ struct list_head list;
+ /* Protect All resources under an amt_tunne_list */
+ spinlock_t lock;
+ struct amt_dev *amt;
+ u32 nr_groups;
+ u32 nr_sources;
+ enum amt_status status;
+ struct delayed_work gc_wq;
+ __be16 source_port;
+ __be32 ip4;
+ __be32 nonce;
+ siphash_key_t key;
+ u64 mac:48,
+ reserved:16;
+ struct rcu_head rcu;
+ struct hlist_head groups[];
+};
+
+union amt_addr {
+ __be32 ip4;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct in6_addr ip6;
+#endif
+};
+
+/* RFC 3810
+ *
+ * When the router is in EXCLUDE mode, the router state is represented
+ * by the notation EXCLUDE (X,Y), where X is called the "Requested List"
+ * and Y is called the "Exclude List". All sources, except those from
+ * the Exclude List, will be forwarded by the router
+ */
+enum amt_source_status {
+ AMT_SOURCE_STATUS_NONE,
+ /* Node of Requested List */
+ AMT_SOURCE_STATUS_FWD,
+ /* Node of Exclude List */
+ AMT_SOURCE_STATUS_D_FWD,
+};
+
+/* protected by gnode->lock */
+struct amt_source_node {
+ struct hlist_node node;
+ struct amt_group_node *gnode;
+ struct delayed_work source_timer;
+ union amt_addr source_addr;
+ enum amt_source_status status;
+#define AMT_SOURCE_OLD 0
+#define AMT_SOURCE_NEW 1
+ u8 flags;
+ struct rcu_head rcu;
+};
+
+/* Protected by amt_tunnel_list->lock */
+struct amt_group_node {
+ struct amt_dev *amt;
+ union amt_addr group_addr;
+ union amt_addr host_addr;
+ bool v6;
+ u8 filter_mode;
+ u32 nr_sources;
+ struct amt_tunnel_list *tunnel_list;
+ struct hlist_node node;
+ struct delayed_work group_timer;
+ struct rcu_head rcu;
+ struct hlist_head sources[];
+};
+
+#define AMT_MAX_EVENTS 16
+struct amt_events {
+ enum amt_event event;
+ struct sk_buff *skb;
+};
+
+struct amt_dev {
+ struct net_device *dev;
+ struct net_device *stream_dev;
+ struct net *net;
+ /* Global lock for amt device */
+ spinlock_t lock;
+ /* Used only in relay mode */
+ struct list_head tunnel_list;
+ struct gro_cells gro_cells;
+
+ /* Protected by RTNL */
+ struct delayed_work discovery_wq;
+ /* Protected by RTNL */
+ struct delayed_work req_wq;
+ /* Protected by RTNL */
+ struct delayed_work secret_wq;
+ struct work_struct event_wq;
+ /* AMT status */
+ enum amt_status status;
+ /* Generated key */
+ siphash_key_t key;
+ struct socket __rcu *sock;
+ u32 max_groups;
+ u32 max_sources;
+ u32 hash_buckets;
+ u32 hash_seed;
+ /* Default 128 */
+ u32 max_tunnels;
+ /* Default 128 */
+ u32 nr_tunnels;
+ /* Gateway or Relay mode */
+ u32 mode;
+ /* Default 2268 */
+ __be16 relay_port;
+ /* Default 2268 */
+ __be16 gw_port;
+ /* Outer local ip */
+ __be32 local_ip;
+ /* Outer remote ip */
+ __be32 remote_ip;
+ /* Outer discovery ip */
+ __be32 discovery_ip;
+ /* Only used in gateway mode */
+ __be32 nonce;
+ /* Gateway sent request and received query */
+ bool ready4;
+ bool ready6;
+ u8 req_cnt;
+ u8 qi;
+ u64 qrv;
+ u64 qri;
+ /* Used only in gateway mode */
+ u64 mac:48,
+ reserved:16;
+ /* AMT gateway side message handler queue */
+ struct amt_events events[AMT_MAX_EVENTS];
+ u8 event_idx;
+ u8 nr_events;
+};
+
+#define AMT_TOS 0xc0
+#define AMT_IPHDR_OPTS 4
+#define AMT_IP6HDR_OPTS 8
+#define AMT_GC_INTERVAL (30 * 1000)
+#define AMT_MAX_GROUP 32
+#define AMT_MAX_SOURCE 128
+#define AMT_HSIZE_SHIFT 8
+#define AMT_HSIZE (1 << AMT_HSIZE_SHIFT)
+
+#define AMT_DISCOVERY_TIMEOUT 5000
+#define AMT_INIT_REQ_TIMEOUT 1
+#define AMT_INIT_QUERY_INTERVAL 125
+#define AMT_MAX_REQ_TIMEOUT 120
+#define AMT_MAX_REQ_COUNT 3
+#define AMT_SECRET_TIMEOUT 60000
+#define IANA_AMT_UDP_PORT 2268
+#define AMT_MAX_TUNNELS 128
+#define AMT_MAX_REQS 128
+#define AMT_GW_HLEN (sizeof(struct iphdr) + \
+ sizeof(struct udphdr) + \
+ sizeof(struct amt_gw_headers))
+#define AMT_RELAY_HLEN (sizeof(struct iphdr) + \
+ sizeof(struct udphdr) + \
+ sizeof(struct amt_relay_headers))
+
+static inline bool netif_is_amt(const struct net_device *dev)
+{
+ return dev->rtnl_link_ops && !strcmp(dev->rtnl_link_ops->kind, "amt");
+}
+
+static inline u64 amt_gmi(const struct amt_dev *amt)
+{
+ return ((amt->qrv * amt->qi) + amt->qri) * 1000;
+}
+
+#endif /* _NET_AMT_H_ */