177 lines
4.4 KiB
C
177 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NET_INET_IPX_H_
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#define _NET_INET_IPX_H_
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/*
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* The following information is in its entirety obtained from:
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*
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* Novell 'IPX Router Specification' Version 1.10
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* Part No. 107-000029-001
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*
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* Which is available from ftp.novell.com
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*/
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#include <linux/netdevice.h>
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#include <net/datalink.h>
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#include <linux/ipx.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/refcount.h>
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struct ipx_address {
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__be32 net;
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__u8 node[IPX_NODE_LEN];
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__be16 sock;
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};
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#define ipx_broadcast_node "\377\377\377\377\377\377"
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#define ipx_this_node "\0\0\0\0\0\0"
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#define IPX_MAX_PPROP_HOPS 8
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struct ipxhdr {
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__be16 ipx_checksum __packed;
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#define IPX_NO_CHECKSUM cpu_to_be16(0xFFFF)
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__be16 ipx_pktsize __packed;
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__u8 ipx_tctrl;
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__u8 ipx_type;
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#define IPX_TYPE_UNKNOWN 0x00
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#define IPX_TYPE_RIP 0x01 /* may also be 0 */
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#define IPX_TYPE_SAP 0x04 /* may also be 0 */
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#define IPX_TYPE_SPX 0x05 /* SPX protocol */
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#define IPX_TYPE_NCP 0x11 /* $lots for docs on this (SPIT) */
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#define IPX_TYPE_PPROP 0x14 /* complicated flood fill brdcast */
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struct ipx_address ipx_dest __packed;
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struct ipx_address ipx_source __packed;
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};
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/* From af_ipx.c */
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extern int sysctl_ipx_pprop_broadcasting;
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static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
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{
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return (struct ipxhdr *)skb_transport_header(skb);
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}
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struct ipx_interface {
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/* IPX address */
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__be32 if_netnum;
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unsigned char if_node[IPX_NODE_LEN];
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refcount_t refcnt;
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/* physical device info */
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struct net_device *if_dev;
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struct datalink_proto *if_dlink;
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__be16 if_dlink_type;
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/* socket support */
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unsigned short if_sknum;
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struct hlist_head if_sklist;
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spinlock_t if_sklist_lock;
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/* administrative overhead */
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int if_ipx_offset;
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unsigned char if_internal;
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unsigned char if_primary;
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struct list_head node; /* node in ipx_interfaces list */
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};
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struct ipx_route {
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__be32 ir_net;
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struct ipx_interface *ir_intrfc;
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unsigned char ir_routed;
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unsigned char ir_router_node[IPX_NODE_LEN];
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struct list_head node; /* node in ipx_routes list */
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refcount_t refcnt;
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};
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struct ipx_cb {
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u8 ipx_tctrl;
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__be32 ipx_dest_net;
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__be32 ipx_source_net;
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struct {
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__be32 netnum;
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int index;
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} last_hop;
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};
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#include <net/sock.h>
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struct ipx_sock {
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/* struct sock has to be the first member of ipx_sock */
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struct sock sk;
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struct ipx_address dest_addr;
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struct ipx_interface *intrfc;
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__be16 port;
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#ifdef CONFIG_IPX_INTERN
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unsigned char node[IPX_NODE_LEN];
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#endif
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unsigned short type;
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/*
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* To handle special ncp connection-handling sockets for mars_nwe,
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* the connection number must be stored in the socket.
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*/
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unsigned short ipx_ncp_conn;
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};
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static inline struct ipx_sock *ipx_sk(struct sock *sk)
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{
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return (struct ipx_sock *)sk;
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}
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#define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
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#define IPX_MIN_EPHEMERAL_SOCKET 0x4000
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#define IPX_MAX_EPHEMERAL_SOCKET 0x7fff
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extern struct list_head ipx_routes;
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extern rwlock_t ipx_routes_lock;
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extern struct list_head ipx_interfaces;
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struct ipx_interface *ipx_interfaces_head(void);
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extern spinlock_t ipx_interfaces_lock;
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extern struct ipx_interface *ipx_primary_net;
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int ipx_proc_init(void);
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void ipx_proc_exit(void);
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const char *ipx_frame_name(__be16);
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const char *ipx_device_name(struct ipx_interface *intrfc);
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static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
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{
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refcount_inc(&intrfc->refcnt);
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}
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void ipxitf_down(struct ipx_interface *intrfc);
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struct ipx_interface *ipxitf_find_using_net(__be32 net);
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int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node);
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__be16 ipx_cksum(struct ipxhdr *packet, int length);
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int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
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unsigned char *node);
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void ipxrtr_del_routes(struct ipx_interface *intrfc);
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int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
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struct msghdr *msg, size_t len, int noblock);
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int ipxrtr_route_skb(struct sk_buff *skb);
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struct ipx_route *ipxrtr_lookup(__be32 net);
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int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
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static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
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{
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if (refcount_dec_and_test(&intrfc->refcnt))
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ipxitf_down(intrfc);
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}
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static __inline__ void ipxrtr_hold(struct ipx_route *rt)
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{
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refcount_inc(&rt->refcnt);
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}
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static __inline__ void ipxrtr_put(struct ipx_route *rt)
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{
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if (refcount_dec_and_test(&rt->refcnt))
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kfree(rt);
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}
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#endif /* _NET_INET_IPX_H_ */
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