appletalk: move the protocol out of tree

AppleTalk has been removed in MacOS X 10.6 (Snow Leopard), in 2009,
according to Wikipedia. We recently got a burst of AI generated
fixes to this protocol which nobody is reviewing.

Let AppleTalk follow AX.25 and hamradio out of the Linux tree.
We we will maintain the code at: github.com/linux-netdev/mod-orphan
for anyone interested in playing with it.

Retain the uAPI for now. No strong reason, simply because I suspect
keeping it will be less controversial.

Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Link: https://patch.msgid.link/20260615222935.947233-3-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 0 insertions, 182 deletions

diff --git a/include/linux/atalk.h b/include/linux/atalk.h
deleted file mode 100644
index ce7e6bfa9e2a..000000000000
--- a/include/linux/atalk.h
+++ /dev/null
@@ -1,182 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __LINUX_ATALK_H__
-#define __LINUX_ATALK_H__
-
-
-#include <net/sock.h>
-#include <uapi/linux/atalk.h>
-
-struct atalk_route {
-	struct net_device  *dev;
-	struct atalk_addr  target;
-	struct atalk_addr  gateway;
-	int		   flags;
-	struct atalk_route *next;
-};
-
-/**
- *	struct atalk_iface - AppleTalk Interface
- *	@dev - Network device associated with this interface
- *	@address - Our address
- *	@status - What are we doing?
- *	@nets - Associated direct netrange
- *	@next - next element in the list of interfaces
- */
-struct atalk_iface {
-	struct net_device	*dev;
-	struct atalk_addr	address;
-	int			status;
-#define ATIF_PROBE	1		/* Probing for an address */
-#define ATIF_PROBE_FAIL	2		/* Probe collided */
-	struct atalk_netrange	nets;
-	struct atalk_iface	*next;
-	struct hlist_node	hash_node;	/* keyed on dev->ifindex */
-};
-	
-struct atalk_sock {
-	/* struct sock has to be the first member of atalk_sock */
-	struct sock	sk;
-	__be16		dest_net;
-	__be16		src_net;
-	unsigned char	dest_node;
-	unsigned char	src_node;
-	unsigned char	dest_port;
-	unsigned char	src_port;
-};
-
-static inline struct atalk_sock *at_sk(struct sock *sk)
-{
-	return (struct atalk_sock *)sk;
-}
-
-struct ddpehdr {
-	__be16	deh_len_hops;	/* lower 10 bits are length, next 4 - hops */
-	__be16	deh_sum;
-	__be16	deh_dnet;
-	__be16	deh_snet;
-	__u8	deh_dnode;
-	__u8	deh_snode;
-	__u8	deh_dport;
-	__u8	deh_sport;
-	/* And netatalk apps expect to stick the type in themselves */
-};
-
-static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
-{
-	return (struct ddpehdr *)skb_transport_header(skb);
-}
-
-/* AppleTalk AARP headers */
-struct elapaarp {
-	__be16	hw_type;
-#define AARP_HW_TYPE_ETHERNET		1
-#define AARP_HW_TYPE_TOKENRING		2
-	__be16	pa_type;
-	__u8	hw_len;
-	__u8	pa_len;
-#define AARP_PA_ALEN			4
-	__be16	function;
-#define AARP_REQUEST			1
-#define AARP_REPLY			2
-#define AARP_PROBE			3
-	__u8	hw_src[ETH_ALEN];
-	__u8	pa_src_zero;
-	__be16	pa_src_net;
-	__u8	pa_src_node;
-	__u8	hw_dst[ETH_ALEN];
-	__u8	pa_dst_zero;
-	__be16	pa_dst_net;
-	__u8	pa_dst_node;
-} __attribute__ ((packed));
-
-static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
-{
-	return (struct elapaarp *)skb_transport_header(skb);
-}
-
-/* Not specified - how long till we drop a resolved entry */
-#define AARP_EXPIRY_TIME	(5 * 60 * HZ)
-/* Size of hash table */
-#define AARP_HASH_SIZE		16
-/* Fast retransmission timer when resolving */
-#define AARP_TICK_TIME		(HZ / 5)
-/* Send 10 requests then give up (2 seconds) */
-#define AARP_RETRANSMIT_LIMIT	10
-/*
- * Some value bigger than total retransmit time + a bit for last reply to
- * appear and to stop continual requests
- */
-#define AARP_RESOLVE_TIME	(10 * HZ)
-
-extern struct datalink_proto *ddp_dl, *aarp_dl;
-extern int aarp_proto_init(void);
-
-/* Inter module exports */
-
-/* Give a device find its atif control structure */
-extern struct atalk_iface *atalk_find_dev(struct net_device *dev);
-
-extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
-extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
-extern int		 aarp_send_ddp(struct net_device *dev,
-				       struct sk_buff *skb,
-				       struct atalk_addr *sa, void *hwaddr);
-extern void		 aarp_device_down(struct net_device *dev);
-extern void		 aarp_probe_network(struct atalk_iface *atif);
-extern int 		 aarp_proxy_probe_network(struct atalk_iface *atif,
-				     struct atalk_addr *sa);
-extern void		 aarp_proxy_remove(struct net_device *dev,
-					   struct atalk_addr *sa);
-
-extern void		aarp_cleanup_module(void);
-
-extern struct hlist_head atalk_sockets;
-extern rwlock_t atalk_sockets_lock;
-
-extern struct atalk_route *atalk_routes;
-extern rwlock_t atalk_routes_lock;
-
-extern struct atalk_iface *atalk_interfaces;
-extern rwlock_t atalk_interfaces_lock;
-
-extern struct atalk_route atrtr_default;
-
-struct aarp_iter_state {
-	int bucket;
-	struct aarp_entry **table;
-};
-
-extern const struct seq_operations aarp_seq_ops;
-
-extern int sysctl_aarp_expiry_time;
-extern int sysctl_aarp_tick_time;
-extern int sysctl_aarp_retransmit_limit;
-extern int sysctl_aarp_resolve_time;
-
-#ifdef CONFIG_SYSCTL
-extern int atalk_register_sysctl(void);
-extern void atalk_unregister_sysctl(void);
-#else
-static inline int atalk_register_sysctl(void)
-{
-	return 0;
-}
-static inline void atalk_unregister_sysctl(void)
-{
-}
-#endif
-
-#ifdef CONFIG_PROC_FS
-extern int atalk_proc_init(void);
-extern void atalk_proc_exit(void);
-#else
-static inline int atalk_proc_init(void)
-{
-	return 0;
-}
-static inline void atalk_proc_exit(void)
-{
-}
-#endif /* CONFIG_PROC_FS */
-
-#endif /* __LINUX_ATALK_H__ */