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