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