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 24struct atalk_addr { 25 __be16 s_net; 26 __u8 s_node; 27}; 28 29struct 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 36struct 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 46struct 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 */ 62struct 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 72struct 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 83static inline struct atalk_sock *at_sk(struct sock *sk) 84{ 85 return (struct atalk_sock *)sk; 86} 87 88struct ddpehdr { 89 __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */ 90 __be16 deh_sum; 91 __be16 deh_dnet; 92 __be16 deh_snet; 93 __u8 deh_dnode; 94 __u8 deh_snode; 95 __u8 deh_dport; 96 __u8 deh_sport; 97 /* And netatalk apps expect to stick the type in themselves */ 98}; 99 100static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb) 101{ 102 return (struct ddpehdr *)skb_transport_header(skb); 103} 104 105/* AppleTalk AARP headers */ 106struct elapaarp { 107 __be16 hw_type; 108#define AARP_HW_TYPE_ETHERNET 1 109#define AARP_HW_TYPE_TOKENRING 2 110 __be16 pa_type; 111 __u8 hw_len; 112 __u8 pa_len; 113#define AARP_PA_ALEN 4 114 __be16 function; 115#define AARP_REQUEST 1 116#define AARP_REPLY 2 117#define AARP_PROBE 3 118 __u8 hw_src[ETH_ALEN]; 119 __u8 pa_src_zero; 120 __be16 pa_src_net; 121 __u8 pa_src_node; 122 __u8 hw_dst[ETH_ALEN]; 123 __u8 pa_dst_zero; 124 __be16 pa_dst_net; 125 __u8 pa_dst_node; 126} __attribute__ ((packed)); 127 128static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) 129{ 130 return (struct elapaarp *)skb_transport_header(skb); 131} 132 133/* Not specified - how long till we drop a resolved entry */ 134#define AARP_EXPIRY_TIME (5 * 60 * HZ) 135/* Size of hash table */ 136#define AARP_HASH_SIZE 16 137/* Fast retransmission timer when resolving */ 138#define AARP_TICK_TIME (HZ / 5) 139/* Send 10 requests then give up (2 seconds) */ 140#define AARP_RETRANSMIT_LIMIT 10 141/* 142 * Some value bigger than total retransmit time + a bit for last reply to 143 * appear and to stop continual requests 144 */ 145#define AARP_RESOLVE_TIME (10 * HZ) 146 147extern struct datalink_proto *ddp_dl, *aarp_dl; 148extern void aarp_proto_init(void); 149 150/* Inter module exports */ 151 152/* Give a device find its atif control structure */ 153static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) 154{ 155 return dev->atalk_ptr; 156} 157 158extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); 159extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); 160extern int aarp_send_ddp(struct net_device *dev, 161 struct sk_buff *skb, 162 struct atalk_addr *sa, void *hwaddr); 163extern void aarp_device_down(struct net_device *dev); 164extern void aarp_probe_network(struct atalk_iface *atif); 165extern int aarp_proxy_probe_network(struct atalk_iface *atif, 166 struct atalk_addr *sa); 167extern void aarp_proxy_remove(struct net_device *dev, 168 struct atalk_addr *sa); 169 170extern void aarp_cleanup_module(void); 171 172extern struct hlist_head atalk_sockets; 173extern rwlock_t atalk_sockets_lock; 174 175extern struct atalk_route *atalk_routes; 176extern rwlock_t atalk_routes_lock; 177 178extern struct atalk_iface *atalk_interfaces; 179extern rwlock_t atalk_interfaces_lock; 180 181extern struct atalk_route atrtr_default; 182 183extern const struct file_operations atalk_seq_arp_fops; 184 185extern int sysctl_aarp_expiry_time; 186extern int sysctl_aarp_tick_time; 187extern int sysctl_aarp_retransmit_limit; 188extern int sysctl_aarp_resolve_time; 189 190#ifdef CONFIG_SYSCTL 191extern void atalk_register_sysctl(void); 192extern void atalk_unregister_sysctl(void); 193#else 194#define atalk_register_sysctl() do { } while(0) 195#define atalk_unregister_sysctl() do { } while(0) 196#endif 197 198#ifdef CONFIG_PROC_FS 199extern int atalk_proc_init(void); 200extern void atalk_proc_exit(void); 201#else 202#define atalk_proc_init() ({ 0; }) 203#define atalk_proc_exit() do { } while(0) 204#endif /* CONFIG_PROC_FS */ 205 206#endif /* __KERNEL__ */ 207#endif /* __LINUX_ATALK_H__ */ 208