1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __LINUX_ATALK_H__ 3#define __LINUX_ATALK_H__ 4 5 6#include <net/sock.h> 7#include <uapi/linux/atalk.h> 8 9struct 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 */ 25struct 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 35struct atalk_sock { 36 /* struct sock has to be the first member of atalk_sock */ 37 struct sock sk; 38 __be16 dest_net; 39 __be16 src_net; 40 unsigned char dest_node; 41 unsigned char src_node; 42 unsigned char dest_port; 43 unsigned char src_port; 44}; 45 46static inline struct atalk_sock *at_sk(struct sock *sk) 47{ 48 return (struct atalk_sock *)sk; 49} 50 51struct ddpehdr { 52 __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */ 53 __be16 deh_sum; 54 __be16 deh_dnet; 55 __be16 deh_snet; 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 63static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb) 64{ 65 return (struct ddpehdr *)skb_transport_header(skb); 66} 67 68/* AppleTalk AARP headers */ 69struct elapaarp { 70 __be16 hw_type; 71#define AARP_HW_TYPE_ETHERNET 1 72#define AARP_HW_TYPE_TOKENRING 2 73 __be16 pa_type; 74 __u8 hw_len; 75 __u8 pa_len; 76#define AARP_PA_ALEN 4 77 __be16 function; 78#define AARP_REQUEST 1 79#define AARP_REPLY 2 80#define AARP_PROBE 3 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)); 90 91static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) 92{ 93 return (struct elapaarp *)skb_transport_header(skb); 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 110extern struct datalink_proto *ddp_dl, *aarp_dl; 111extern int aarp_proto_init(void); 112 113/* Inter module exports */ 114 115/* Give a device find its atif control structure */ 116#if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK) 117static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) 118{ 119 return dev->atalk_ptr; 120} 121#endif 122 123extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); 124extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); 125extern int aarp_send_ddp(struct net_device *dev, 126 struct sk_buff *skb, 127 struct atalk_addr *sa, void *hwaddr); 128extern void aarp_device_down(struct net_device *dev); 129extern void aarp_probe_network(struct atalk_iface *atif); 130extern int aarp_proxy_probe_network(struct atalk_iface *atif, 131 struct atalk_addr *sa); 132extern void aarp_proxy_remove(struct net_device *dev, 133 struct atalk_addr *sa); 134 135extern void aarp_cleanup_module(void); 136 137extern struct hlist_head atalk_sockets; 138extern rwlock_t atalk_sockets_lock; 139 140extern struct atalk_route *atalk_routes; 141extern rwlock_t atalk_routes_lock; 142 143extern struct atalk_iface *atalk_interfaces; 144extern rwlock_t atalk_interfaces_lock; 145 146extern struct atalk_route atrtr_default; 147 148struct aarp_iter_state { 149 int bucket; 150 struct aarp_entry **table; 151}; 152 153extern const struct seq_operations aarp_seq_ops; 154 155extern int sysctl_aarp_expiry_time; 156extern int sysctl_aarp_tick_time; 157extern int sysctl_aarp_retransmit_limit; 158extern int sysctl_aarp_resolve_time; 159 160#ifdef CONFIG_SYSCTL 161extern int atalk_register_sysctl(void); 162extern void atalk_unregister_sysctl(void); 163#else 164static inline int atalk_register_sysctl(void) 165{ 166 return 0; 167} 168static inline void atalk_unregister_sysctl(void) 169{ 170} 171#endif 172 173#ifdef CONFIG_PROC_FS 174extern int atalk_proc_init(void); 175extern void atalk_proc_exit(void); 176#else 177static inline int atalk_proc_init(void) 178{ 179 return 0; 180} 181static inline void atalk_proc_exit(void) 182{ 183} 184#endif /* CONFIG_PROC_FS */ 185 186#endif /* __LINUX_ATALK_H__ */ 187