1 #ifndef __LINUX_ATALK_H__ 2 #define __LINUX_ATALK_H__ 3 4 #include <linux/types.h> 5 #include <asm/byteorder.h> 6 #include <linux/socket.h> 7 8 /* 9 * AppleTalk networking structures 10 * 11 * The following are directly referenced from the University Of Michigan 12 * netatalk for compatibility reasons. 13 */ 14 #define ATPORT_FIRST 1 15 #define ATPORT_RESERVED 128 16 #define ATPORT_LAST 254 /* 254 is only legal on localtalk */ 17 #define ATADDR_ANYNET (__u16)0 18 #define ATADDR_ANYNODE (__u8)0 19 #define ATADDR_ANYPORT (__u8)0 20 #define ATADDR_BCAST (__u8)255 21 #define DDP_MAXSZ 587 22 #define DDP_MAXHOPS 15 /* 4 bits of hop counter */ 23 24 #define SIOCATALKDIFADDR (SIOCPROTOPRIVATE + 0) 25 26 struct atalk_addr { 27 __be16 s_net; 28 __u8 s_node; 29 }; 30 31 struct sockaddr_at { 32 __kernel_sa_family_t sat_family; 33 __u8 sat_port; 34 struct atalk_addr sat_addr; 35 char sat_zero[8]; 36 }; 37 38 struct atalk_netrange { 39 __u8 nr_phase; 40 __be16 nr_firstnet; 41 __be16 nr_lastnet; 42 }; 43 44 #ifdef __KERNEL__ 45 46 #include <net/sock.h> 47 48 struct atalk_route { 49 struct net_device *dev; 50 struct atalk_addr target; 51 struct atalk_addr gateway; 52 int flags; 53 struct atalk_route *next; 54 }; 55 56 /** 57 * struct atalk_iface - AppleTalk Interface 58 * @dev - Network device associated with this interface 59 * @address - Our address 60 * @status - What are we doing? 61 * @nets - Associated direct netrange 62 * @next - next element in the list of interfaces 63 */ 64 struct atalk_iface { 65 struct net_device *dev; 66 struct atalk_addr address; 67 int status; 68 #define ATIF_PROBE 1 /* Probing for an address */ 69 #define ATIF_PROBE_FAIL 2 /* Probe collided */ 70 struct atalk_netrange nets; 71 struct atalk_iface *next; 72 }; 73 74 struct atalk_sock { 75 /* struct sock has to be the first member of atalk_sock */ 76 struct sock sk; 77 __be16 dest_net; 78 __be16 src_net; 79 unsigned char dest_node; 80 unsigned char src_node; 81 unsigned char dest_port; 82 unsigned char src_port; 83 }; 84 at_sk(struct sock * sk)85static inline struct atalk_sock *at_sk(struct sock *sk) 86 { 87 return (struct atalk_sock *)sk; 88 } 89 90 struct ddpehdr { 91 __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */ 92 __be16 deh_sum; 93 __be16 deh_dnet; 94 __be16 deh_snet; 95 __u8 deh_dnode; 96 __u8 deh_snode; 97 __u8 deh_dport; 98 __u8 deh_sport; 99 /* And netatalk apps expect to stick the type in themselves */ 100 }; 101 ddp_hdr(struct sk_buff * skb)102static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb) 103 { 104 return (struct ddpehdr *)skb_transport_header(skb); 105 } 106 107 /* AppleTalk AARP headers */ 108 struct elapaarp { 109 __be16 hw_type; 110 #define AARP_HW_TYPE_ETHERNET 1 111 #define AARP_HW_TYPE_TOKENRING 2 112 __be16 pa_type; 113 __u8 hw_len; 114 __u8 pa_len; 115 #define AARP_PA_ALEN 4 116 __be16 function; 117 #define AARP_REQUEST 1 118 #define AARP_REPLY 2 119 #define AARP_PROBE 3 120 __u8 hw_src[ETH_ALEN]; 121 __u8 pa_src_zero; 122 __be16 pa_src_net; 123 __u8 pa_src_node; 124 __u8 hw_dst[ETH_ALEN]; 125 __u8 pa_dst_zero; 126 __be16 pa_dst_net; 127 __u8 pa_dst_node; 128 } __attribute__ ((packed)); 129 aarp_hdr(struct sk_buff * skb)130static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) 131 { 132 return (struct elapaarp *)skb_transport_header(skb); 133 } 134 135 /* Not specified - how long till we drop a resolved entry */ 136 #define AARP_EXPIRY_TIME (5 * 60 * HZ) 137 /* Size of hash table */ 138 #define AARP_HASH_SIZE 16 139 /* Fast retransmission timer when resolving */ 140 #define AARP_TICK_TIME (HZ / 5) 141 /* Send 10 requests then give up (2 seconds) */ 142 #define AARP_RETRANSMIT_LIMIT 10 143 /* 144 * Some value bigger than total retransmit time + a bit for last reply to 145 * appear and to stop continual requests 146 */ 147 #define AARP_RESOLVE_TIME (10 * HZ) 148 149 extern struct datalink_proto *ddp_dl, *aarp_dl; 150 extern void aarp_proto_init(void); 151 152 /* Inter module exports */ 153 154 /* Give a device find its atif control structure */ atalk_find_dev(struct net_device * dev)155static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) 156 { 157 return dev->atalk_ptr; 158 } 159 160 extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); 161 extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); 162 extern int aarp_send_ddp(struct net_device *dev, 163 struct sk_buff *skb, 164 struct atalk_addr *sa, void *hwaddr); 165 extern void aarp_device_down(struct net_device *dev); 166 extern void aarp_probe_network(struct atalk_iface *atif); 167 extern int aarp_proxy_probe_network(struct atalk_iface *atif, 168 struct atalk_addr *sa); 169 extern void aarp_proxy_remove(struct net_device *dev, 170 struct atalk_addr *sa); 171 172 extern void aarp_cleanup_module(void); 173 174 extern struct hlist_head atalk_sockets; 175 extern rwlock_t atalk_sockets_lock; 176 177 extern struct atalk_route *atalk_routes; 178 extern rwlock_t atalk_routes_lock; 179 180 extern struct atalk_iface *atalk_interfaces; 181 extern rwlock_t atalk_interfaces_lock; 182 183 extern struct atalk_route atrtr_default; 184 185 extern const struct file_operations atalk_seq_arp_fops; 186 187 extern int sysctl_aarp_expiry_time; 188 extern int sysctl_aarp_tick_time; 189 extern int sysctl_aarp_retransmit_limit; 190 extern int sysctl_aarp_resolve_time; 191 192 #ifdef CONFIG_SYSCTL 193 extern void atalk_register_sysctl(void); 194 extern void atalk_unregister_sysctl(void); 195 #else 196 #define atalk_register_sysctl() do { } while(0) 197 #define atalk_unregister_sysctl() do { } while(0) 198 #endif 199 200 #ifdef CONFIG_PROC_FS 201 extern int atalk_proc_init(void); 202 extern void atalk_proc_exit(void); 203 #else 204 #define atalk_proc_init() ({ 0; }) 205 #define atalk_proc_exit() do { } while(0) 206 #endif /* CONFIG_PROC_FS */ 207 208 #endif /* __KERNEL__ */ 209 #endif /* __LINUX_ATALK_H__ */ 210