1 #ifndef __LINUX_ATALK_H__ 2 #define __LINUX_ATALK_H__ 3 4 #include <asm/byteorder.h> 5 6 /* 7 * AppleTalk networking structures 8 * 9 * The following are directly referenced from the University Of Michigan 10 * netatalk for compatibility reasons. 11 */ 12 #define ATPORT_FIRST 1 13 #define ATPORT_RESERVED 128 14 #define ATPORT_LAST 254 /* 254 is only legal on localtalk */ 15 #define ATADDR_ANYNET (__u16)0 16 #define ATADDR_ANYNODE (__u8)0 17 #define ATADDR_ANYPORT (__u8)0 18 #define ATADDR_BCAST (__u8)255 19 #define DDP_MAXSZ 587 20 #define DDP_MAXHOPS 15 /* 4 bits of hop counter */ 21 22 #define SIOCATALKDIFADDR (SIOCPROTOPRIVATE + 0) 23 24 struct atalk_addr { 25 __be16 s_net; 26 __u8 s_node; 27 }; 28 29 struct sockaddr_at { 30 sa_family_t sat_family; 31 __u8 sat_port; 32 struct atalk_addr sat_addr; 33 char sat_zero[8]; 34 }; 35 36 struct atalk_netrange { 37 __u8 nr_phase; 38 __be16 nr_firstnet; 39 __be16 nr_lastnet; 40 }; 41 42 #ifdef __KERNEL__ 43 44 #include <net/sock.h> 45 46 struct atalk_route { 47 struct net_device *dev; 48 struct atalk_addr target; 49 struct atalk_addr gateway; 50 int flags; 51 struct atalk_route *next; 52 }; 53 54 /** 55 * struct atalk_iface - AppleTalk Interface 56 * @dev - Network device associated with this interface 57 * @address - Our address 58 * @status - What are we doing? 59 * @nets - Associated direct netrange 60 * @next - next element in the list of interfaces 61 */ 62 struct atalk_iface { 63 struct net_device *dev; 64 struct atalk_addr address; 65 int status; 66 #define ATIF_PROBE 1 /* Probing for an address */ 67 #define ATIF_PROBE_FAIL 2 /* Probe collided */ 68 struct atalk_netrange nets; 69 struct atalk_iface *next; 70 }; 71 72 struct atalk_sock { 73 /* struct sock has to be the first member of atalk_sock */ 74 struct sock sk; 75 __be16 dest_net; 76 __be16 src_net; 77 unsigned char dest_node; 78 unsigned char src_node; 79 unsigned char dest_port; 80 unsigned char src_port; 81 }; 82 83 static inline struct atalk_sock *at_sk(struct sock *sk) 84 { 85 return (struct atalk_sock *)sk; 86 } 87 88 #include <asm/byteorder.h> 89 90 struct ddpehdr { 91 #ifdef __LITTLE_ENDIAN_BITFIELD 92 __u16 deh_len:10, 93 deh_hops:4, 94 deh_pad:2; 95 #else 96 __u16 deh_pad:2, 97 deh_hops:4, 98 deh_len:10; 99 #endif 100 __be16 deh_sum; 101 __be16 deh_dnet; 102 __be16 deh_snet; 103 __u8 deh_dnode; 104 __u8 deh_snode; 105 __u8 deh_dport; 106 __u8 deh_sport; 107 /* And netatalk apps expect to stick the type in themselves */ 108 }; 109 110 static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb) 111 { 112 return (struct ddpehdr *)skb->h.raw; 113 } 114 115 /* 116 * Don't drop the struct into the struct above. You'll get some 117 * surprise padding. 118 */ 119 struct ddpebits { 120 #ifdef __LITTLE_ENDIAN_BITFIELD 121 __u16 deh_len:10, 122 deh_hops:4, 123 deh_pad:2; 124 #else 125 __u16 deh_pad:2, 126 deh_hops:4, 127 deh_len:10; 128 #endif 129 }; 130 131 /* Short form header */ 132 struct ddpshdr { 133 #ifdef __LITTLE_ENDIAN_BITFIELD 134 __u16 dsh_len:10, 135 dsh_pad:6; 136 #else 137 __u16 dsh_pad:6, 138 dsh_len:10; 139 #endif 140 __u8 dsh_dport; 141 __u8 dsh_sport; 142 /* And netatalk apps expect to stick the type in themselves */ 143 }; 144 145 /* AppleTalk AARP headers */ 146 struct elapaarp { 147 __be16 hw_type; 148 #define AARP_HW_TYPE_ETHERNET 1 149 #define AARP_HW_TYPE_TOKENRING 2 150 __be16 pa_type; 151 __u8 hw_len; 152 __u8 pa_len; 153 #define AARP_PA_ALEN 4 154 __be16 function; 155 #define AARP_REQUEST 1 156 #define AARP_REPLY 2 157 #define AARP_PROBE 3 158 __u8 hw_src[ETH_ALEN]; 159 __u8 pa_src_zero; 160 __be16 pa_src_net; 161 __u8 pa_src_node; 162 __u8 hw_dst[ETH_ALEN]; 163 __u8 pa_dst_zero; 164 __be16 pa_dst_net; 165 __u8 pa_dst_node; 166 } __attribute__ ((packed)); 167 168 static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) 169 { 170 return (struct elapaarp *)skb->h.raw; 171 } 172 173 /* Not specified - how long till we drop a resolved entry */ 174 #define AARP_EXPIRY_TIME (5 * 60 * HZ) 175 /* Size of hash table */ 176 #define AARP_HASH_SIZE 16 177 /* Fast retransmission timer when resolving */ 178 #define AARP_TICK_TIME (HZ / 5) 179 /* Send 10 requests then give up (2 seconds) */ 180 #define AARP_RETRANSMIT_LIMIT 10 181 /* 182 * Some value bigger than total retransmit time + a bit for last reply to 183 * appear and to stop continual requests 184 */ 185 #define AARP_RESOLVE_TIME (10 * HZ) 186 187 extern struct datalink_proto *ddp_dl, *aarp_dl; 188 extern void aarp_proto_init(void); 189 190 /* Inter module exports */ 191 192 /* Give a device find its atif control structure */ 193 static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) 194 { 195 return dev->atalk_ptr; 196 } 197 198 extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); 199 extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); 200 extern int aarp_send_ddp(struct net_device *dev, 201 struct sk_buff *skb, 202 struct atalk_addr *sa, void *hwaddr); 203 extern void aarp_device_down(struct net_device *dev); 204 extern void aarp_probe_network(struct atalk_iface *atif); 205 extern int aarp_proxy_probe_network(struct atalk_iface *atif, 206 struct atalk_addr *sa); 207 extern void aarp_proxy_remove(struct net_device *dev, 208 struct atalk_addr *sa); 209 210 extern void aarp_cleanup_module(void); 211 212 extern struct hlist_head atalk_sockets; 213 extern rwlock_t atalk_sockets_lock; 214 215 extern struct atalk_route *atalk_routes; 216 extern rwlock_t atalk_routes_lock; 217 218 extern struct atalk_iface *atalk_interfaces; 219 extern rwlock_t atalk_interfaces_lock; 220 221 extern struct atalk_route atrtr_default; 222 223 extern struct file_operations atalk_seq_arp_fops; 224 225 extern int sysctl_aarp_expiry_time; 226 extern int sysctl_aarp_tick_time; 227 extern int sysctl_aarp_retransmit_limit; 228 extern int sysctl_aarp_resolve_time; 229 230 #ifdef CONFIG_SYSCTL 231 extern void atalk_register_sysctl(void); 232 extern void atalk_unregister_sysctl(void); 233 #else 234 #define atalk_register_sysctl() do { } while(0) 235 #define atalk_unregister_sysctl() do { } while(0) 236 #endif 237 238 #ifdef CONFIG_PROC_FS 239 extern int atalk_proc_init(void); 240 extern void atalk_proc_exit(void); 241 #else 242 #define atalk_proc_init() ({ 0; }) 243 #define atalk_proc_exit() do { } while(0) 244 #endif /* CONFIG_PROC_FS */ 245 246 #endif /* __KERNEL__ */ 247 #endif /* __LINUX_ATALK_H__ */ 248