[mirror_ubuntu-bionic-kernel.git] / include / linux / atalk.h

/* 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 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 */
static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
{
	return dev->atalk_ptr;
}

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;

extern const struct file_operations atalk_seq_arp_fops;

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__ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef __LINUX_ATALK_H__
	3	#define __LINUX_ATALK_H__
	4
9f3786dc DM	5
9f3786dc DM	6	#include <net/sock.h>
607ca46e	7	#include <uapi/linux/atalk.h>
9f3786dc	8
1da177e4 LT	9	struct atalk_route {
	10	struct net_device *dev;
	11	struct atalk_addr target;
	12	struct atalk_addr gateway;
	13	int flags;
	14	struct atalk_route *next;
	15	};
	16
	17	/**
	18	* struct atalk_iface - AppleTalk Interface
	19	* @dev - Network device associated with this interface
	20	* @address - Our address
	21	* @status - What are we doing?
	22	* @nets - Associated direct netrange
	23	* @next - next element in the list of interfaces
	24	*/
	25	struct atalk_iface {
	26	struct net_device *dev;
	27	struct atalk_addr address;
	28	int status;
	29	#define ATIF_PROBE 1 /* Probing for an address */
	30	#define ATIF_PROBE_FAIL 2 /* Probe collided */
	31	struct atalk_netrange nets;
	32	struct atalk_iface *next;
	33	};
	34
	35	struct atalk_sock {
	36	/* struct sock has to be the first member of atalk_sock */
	37	struct sock sk;
f6e276ee AD	38	__be16 dest_net;
f6e276ee AD	39	__be16 src_net;
1da177e4 LT	40	unsigned char dest_node;
	41	unsigned char src_node;
	42	unsigned char dest_port;
	43	unsigned char src_port;
	44	};
	45
	46	static inline struct atalk_sock at_sk(struct sock sk)
	47	{
	48	return (struct atalk_sock *)sk;
	49	}
	50
1da177e4	51	struct ddpehdr {
2a50f28c	52	__be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */
f6e276ee AD	53	__be16 deh_sum;
	54	__be16 deh_dnet;
	55	__be16 deh_snet;
1da177e4 LT	56	__u8 deh_dnode;
	57	__u8 deh_snode;
	58	__u8 deh_dport;
	59	__u8 deh_sport;
	60	/* And netatalk apps expect to stick the type in themselves */
	61	};
	62
	63	static __inline__ struct ddpehdr ddp_hdr(struct sk_buff skb)
	64	{
9c70220b	65	return (struct ddpehdr *)skb_transport_header(skb);
1da177e4 LT	66	}
1da177e4 LT	67
1da177e4 LT	68	/* AppleTalk AARP headers */
1da177e4 LT	69	struct elapaarp {
f6e276ee	70	__be16 hw_type;
1da177e4 LT	71	#define AARP_HW_TYPE_ETHERNET 1
1da177e4 LT	72	#define AARP_HW_TYPE_TOKENRING 2
f6e276ee	73	__be16 pa_type;
1da177e4 LT	74	__u8 hw_len;
	75	__u8 pa_len;
	76	#define AARP_PA_ALEN 4
f6e276ee	77	__be16 function;
1da177e4 LT	78	#define AARP_REQUEST 1
	79	#define AARP_REPLY 2
	80	#define AARP_PROBE 3
6a878184 JB	81	__u8 hw_src[ETH_ALEN];
	82	__u8 pa_src_zero;
	83	__be16 pa_src_net;
	84	__u8 pa_src_node;
	85	__u8 hw_dst[ETH_ALEN];
	86	__u8 pa_dst_zero;
	87	__be16 pa_dst_net;
	88	__u8 pa_dst_node;
	89	} __attribute__ ((packed));
1da177e4 LT	90
	91	static __inline__ struct elapaarp aarp_hdr(struct sk_buff skb)
	92	{
9c70220b	93	return (struct elapaarp *)skb_transport_header(skb);
1da177e4 LT	94	}
	95
	96	/* Not specified - how long till we drop a resolved entry */
	97	#define AARP_EXPIRY_TIME (5 * 60 * HZ)
	98	/* Size of hash table */
	99	#define AARP_HASH_SIZE 16
	100	/* Fast retransmission timer when resolving */
	101	#define AARP_TICK_TIME (HZ / 5)
	102	/* Send 10 requests then give up (2 seconds) */
	103	#define AARP_RETRANSMIT_LIMIT 10
	104	/*
	105	* Some value bigger than total retransmit time + a bit for last reply to
	106	* appear and to stop continual requests
	107	*/
	108	#define AARP_RESOLVE_TIME (10 * HZ)
	109
	110	extern struct datalink_proto ddp_dl, aarp_dl;
ecf1bef9	111	extern int aarp_proto_init(void);
1da177e4 LT	112
	113	/* Inter module exports */
	114
	115	/* Give a device find its atif control structure */
	116	static inline struct atalk_iface atalk_find_dev(struct net_device dev)
	117	{
	118	return dev->atalk_ptr;
	119	}
	120
	121	extern struct atalk_addr atalk_find_dev_addr(struct net_device dev);
	122	extern struct net_device atrtr_get_dev(struct atalk_addr sa);
	123	extern int aarp_send_ddp(struct net_device *dev,
	124	struct sk_buff *skb,
	125	struct atalk_addr sa, void hwaddr);
	126	extern void aarp_device_down(struct net_device *dev);
	127	extern void aarp_probe_network(struct atalk_iface *atif);
	128	extern int aarp_proxy_probe_network(struct atalk_iface *atif,
	129	struct atalk_addr *sa);
	130	extern void aarp_proxy_remove(struct net_device *dev,
	131	struct atalk_addr *sa);
	132
	133	extern void aarp_cleanup_module(void);
	134
	135	extern struct hlist_head atalk_sockets;
	136	extern rwlock_t atalk_sockets_lock;
	137
	138	extern struct atalk_route *atalk_routes;
	139	extern rwlock_t atalk_routes_lock;
	140
	141	extern struct atalk_iface *atalk_interfaces;
	142	extern rwlock_t atalk_interfaces_lock;
	143
	144	extern struct atalk_route atrtr_default;
	145
54047320	146	extern const struct file_operations atalk_seq_arp_fops;
1da177e4 LT	147
	148	extern int sysctl_aarp_expiry_time;
	149	extern int sysctl_aarp_tick_time;
	150	extern int sysctl_aarp_retransmit_limit;
	151	extern int sysctl_aarp_resolve_time;
	152
	153	#ifdef CONFIG_SYSCTL
0979e088	154	extern int atalk_register_sysctl(void);
1da177e4 LT	155	extern void atalk_unregister_sysctl(void);
1da177e4 LT	156	#else
0225c27d AB	157	static inline int atalk_register_sysctl(void)
	158	{
	159	return 0;
	160	}
	161	static inline void atalk_unregister_sysctl(void)
	162	{
	163	}
1da177e4 LT	164	#endif
	165
	166	#ifdef CONFIG_PROC_FS
	167	extern int atalk_proc_init(void);
	168	extern void atalk_proc_exit(void);
	169	#else
0225c27d AB	170	static inline int atalk_proc_init(void)
	171	{
	172	return 0;
	173	}
	174	static inline void atalk_proc_exit(void)
	175	{
	176	}
1da177e4 LT	177	#endif /* CONFIG_PROC_FS */
1da177e4 LT	178
1da177e4	179	#endif /* __LINUX_ATALK_H__ */