1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _NET_INET_IPX_H_ 3#define _NET_INET_IPX_H_ 4/* 5 * The following information is in its entirety obtained from: 6 * 7 * Novell 'IPX Router Specification' Version 1.10 8 * Part No. 107-000029-001 9 * 10 * Which is available from ftp.novell.com 11 */ 12 13#include <linux/netdevice.h> 14#include <net/datalink.h> 15#include <linux/ipx.h> 16#include <linux/list.h> 17#include <linux/slab.h> 18#include <linux/refcount.h> 19 20struct ipx_address { 21 __be32 net; 22 __u8 node[IPX_NODE_LEN]; 23 __be16 sock; 24}; 25 26#define ipx_broadcast_node "\377\377\377\377\377\377" 27#define ipx_this_node "\0\0\0\0\0\0" 28 29#define IPX_MAX_PPROP_HOPS 8 30 31struct ipxhdr { 32 __be16 ipx_checksum __packed; 33#define IPX_NO_CHECKSUM cpu_to_be16(0xFFFF) 34 __be16 ipx_pktsize __packed; 35 __u8 ipx_tctrl; 36 __u8 ipx_type; 37#define IPX_TYPE_UNKNOWN 0x00 38#define IPX_TYPE_RIP 0x01 /* may also be 0 */ 39#define IPX_TYPE_SAP 0x04 /* may also be 0 */ 40#define IPX_TYPE_SPX 0x05 /* SPX protocol */ 41#define IPX_TYPE_NCP 0x11 /* $lots for docs on this (SPIT) */ 42#define IPX_TYPE_PPROP 0x14 /* complicated flood fill brdcast */ 43 struct ipx_address ipx_dest __packed; 44 struct ipx_address ipx_source __packed; 45}; 46 47/* From af_ipx.c */ 48extern int sysctl_ipx_pprop_broadcasting; 49 50struct ipx_interface { 51 /* IPX address */ 52 __be32 if_netnum; 53 unsigned char if_node[IPX_NODE_LEN]; 54 refcount_t refcnt; 55 56 /* physical device info */ 57 struct net_device *if_dev; 58 struct datalink_proto *if_dlink; 59 __be16 if_dlink_type; 60 61 /* socket support */ 62 unsigned short if_sknum; 63 struct hlist_head if_sklist; 64 spinlock_t if_sklist_lock; 65 66 /* administrative overhead */ 67 int if_ipx_offset; 68 unsigned char if_internal; 69 unsigned char if_primary; 70 71 struct list_head node; /* node in ipx_interfaces list */ 72}; 73 74struct ipx_route { 75 __be32 ir_net; 76 struct ipx_interface *ir_intrfc; 77 unsigned char ir_routed; 78 unsigned char ir_router_node[IPX_NODE_LEN]; 79 struct list_head node; /* node in ipx_routes list */ 80 refcount_t refcnt; 81}; 82 83struct ipx_cb { 84 u8 ipx_tctrl; 85 __be32 ipx_dest_net; 86 __be32 ipx_source_net; 87 struct { 88 __be32 netnum; 89 int index; 90 } last_hop; 91}; 92 93#include <net/sock.h> 94 95struct ipx_sock { 96 /* struct sock has to be the first member of ipx_sock */ 97 struct sock sk; 98 struct ipx_address dest_addr; 99 struct ipx_interface *intrfc; 100 __be16 port; 101#ifdef CONFIG_IPX_INTERN 102 unsigned char node[IPX_NODE_LEN]; 103#endif 104 unsigned short type; 105 /* 106 * To handle special ncp connection-handling sockets for mars_nwe, 107 * the connection number must be stored in the socket. 108 */ 109 unsigned short ipx_ncp_conn; 110}; 111 112static inline struct ipx_sock *ipx_sk(struct sock *sk) 113{ 114 return (struct ipx_sock *)sk; 115} 116 117#define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0])) 118 119#define IPX_MIN_EPHEMERAL_SOCKET 0x4000 120#define IPX_MAX_EPHEMERAL_SOCKET 0x7fff 121 122extern struct list_head ipx_routes; 123extern rwlock_t ipx_routes_lock; 124 125extern struct list_head ipx_interfaces; 126struct ipx_interface *ipx_interfaces_head(void); 127extern spinlock_t ipx_interfaces_lock; 128 129extern struct ipx_interface *ipx_primary_net; 130 131int ipx_proc_init(void); 132void ipx_proc_exit(void); 133 134const char *ipx_frame_name(__be16); 135const char *ipx_device_name(struct ipx_interface *intrfc); 136 137static __inline__ void ipxitf_hold(struct ipx_interface *intrfc) 138{ 139 refcount_inc(&intrfc->refcnt); 140} 141 142void ipxitf_down(struct ipx_interface *intrfc); 143struct ipx_interface *ipxitf_find_using_net(__be32 net); 144int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node); 145__be16 ipx_cksum(struct ipxhdr *packet, int length); 146int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc, 147 unsigned char *node); 148void ipxrtr_del_routes(struct ipx_interface *intrfc); 149int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, 150 struct msghdr *msg, size_t len, int noblock); 151int ipxrtr_route_skb(struct sk_buff *skb); 152struct ipx_route *ipxrtr_lookup(__be32 net); 153int ipxrtr_ioctl(unsigned int cmd, void __user *arg); 154 155static __inline__ void ipxitf_put(struct ipx_interface *intrfc) 156{ 157 if (refcount_dec_and_test(&intrfc->refcnt)) 158 ipxitf_down(intrfc); 159} 160 161static __inline__ void ipxrtr_hold(struct ipx_route *rt) 162{ 163 refcount_inc(&rt->refcnt); 164} 165 166static __inline__ void ipxrtr_put(struct ipx_route *rt) 167{ 168 if (refcount_dec_and_test(&rt->refcnt)) 169 kfree(rt); 170} 171#endif /* _NET_INET_IPX_H_ */ 172