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 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; 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 at_sk(struct sock * sk)46static inline struct atalk_sock *at_sk(struct sock *sk) 47 { 48 return (struct atalk_sock *)sk; 49 } 50 51 struct 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 ddp_hdr(struct sk_buff * skb)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 */ 69 struct 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 aarp_hdr(struct sk_buff * skb)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) 109 110 extern struct datalink_proto *ddp_dl, *aarp_dl; 111 extern 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_ATALK) atalk_find_dev(struct net_device * dev)117static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) 118 { 119 return dev->atalk_ptr; 120 } 121 #endif 122 123 extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); 124 extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); 125 extern int aarp_send_ddp(struct net_device *dev, 126 struct sk_buff *skb, 127 struct atalk_addr *sa, void *hwaddr); 128 extern void aarp_device_down(struct net_device *dev); 129 extern void aarp_probe_network(struct atalk_iface *atif); 130 extern int aarp_proxy_probe_network(struct atalk_iface *atif, 131 struct atalk_addr *sa); 132 extern void aarp_proxy_remove(struct net_device *dev, 133 struct atalk_addr *sa); 134 135 extern void aarp_cleanup_module(void); 136 137 extern struct hlist_head atalk_sockets; 138 extern rwlock_t atalk_sockets_lock; 139 140 extern struct atalk_route *atalk_routes; 141 extern rwlock_t atalk_routes_lock; 142 143 extern struct atalk_iface *atalk_interfaces; 144 extern rwlock_t atalk_interfaces_lock; 145 146 extern struct atalk_route atrtr_default; 147 148 struct aarp_iter_state { 149 int bucket; 150 struct aarp_entry **table; 151 }; 152 153 extern const struct seq_operations aarp_seq_ops; 154 155 extern int sysctl_aarp_expiry_time; 156 extern int sysctl_aarp_tick_time; 157 extern int sysctl_aarp_retransmit_limit; 158 extern int sysctl_aarp_resolve_time; 159 160 #ifdef CONFIG_SYSCTL 161 extern int atalk_register_sysctl(void); 162 extern void atalk_unregister_sysctl(void); 163 #else atalk_register_sysctl(void)164static inline int atalk_register_sysctl(void) 165 { 166 return 0; 167 } atalk_unregister_sysctl(void)168static inline void atalk_unregister_sysctl(void) 169 { 170 } 171 #endif 172 173 #ifdef CONFIG_PROC_FS 174 extern int atalk_proc_init(void); 175 extern void atalk_proc_exit(void); 176 #else atalk_proc_init(void)177static inline int atalk_proc_init(void) 178 { 179 return 0; 180 } atalk_proc_exit(void)181static inline void atalk_proc_exit(void) 182 { 183 } 184 #endif /* CONFIG_PROC_FS */ 185 186 #endif /* __LINUX_ATALK_H__ */ 187