cregit-Linux how code gets into the kernel

Release 4.12 include/net/ipx.h

Directory: include/net
#ifndef _NET_INET_IPX_H_

#define _NET_INET_IPX_H_
/*
 *      The following information is in its entirety obtained from:
 *
 *      Novell 'IPX Router Specification' Version 1.10 
 *              Part No. 107-000029-001
 *
 *      Which is available from ftp.novell.com
 */

#include <linux/netdevice.h>
#include <net/datalink.h>
#include <linux/ipx.h>
#include <linux/list.h>
#include <linux/slab.h>


struct ipx_address {
	
__be32  net;
	
__u8    node[IPX_NODE_LEN]; 
	
__be16  sock;
};


#define ipx_broadcast_node	"\377\377\377\377\377\377"

#define ipx_this_node           "\0\0\0\0\0\0"


#define IPX_MAX_PPROP_HOPS 8


struct ipxhdr {
	
__be16			ipx_checksum __packed;

#define IPX_NO_CHECKSUM	cpu_to_be16(0xFFFF)
	
__be16			ipx_pktsize __packed;
	
__u8			ipx_tctrl;
	
__u8			ipx_type;

#define IPX_TYPE_UNKNOWN	0x00

#define IPX_TYPE_RIP		0x01	/* may also be 0 */

#define IPX_TYPE_SAP		0x04	/* may also be 0 */

#define IPX_TYPE_SPX		0x05	/* SPX protocol */

#define IPX_TYPE_NCP		0x11	/* $lots for docs on this (SPIT) */

#define IPX_TYPE_PPROP		0x14	/* complicated flood fill brdcast */
	
struct ipx_address	ipx_dest __packed;
	
struct ipx_address	ipx_source __packed;
};

/* From af_ipx.c */
extern int sysctl_ipx_pprop_broadcasting;


static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
{
	return (struct ipxhdr *)skb_transport_header(skb);
}


struct ipx_interface {
	/* IPX address */
	
__be32			if_netnum;
	
unsigned char		if_node[IPX_NODE_LEN];
	
atomic_t		refcnt;

	/* physical device info */
	
struct net_device	*if_dev;
	
struct datalink_proto	*if_dlink;
	
__be16			if_dlink_type;

	/* socket support */
	
unsigned short		if_sknum;
	
struct hlist_head	if_sklist;
	
spinlock_t		if_sklist_lock;

	/* administrative overhead */
	
int			if_ipx_offset;
	
unsigned char		if_internal;
	
unsigned char		if_primary;
	
	
struct list_head	node; /* node in ipx_interfaces list */
};


struct ipx_route {
	
__be32			ir_net;
	
struct ipx_interface	*ir_intrfc;
	
unsigned char		ir_routed;
	
unsigned char		ir_router_node[IPX_NODE_LEN];
	
struct list_head	node; /* node in ipx_routes list */
	
atomic_t		refcnt;
};


struct ipx_cb {
	
u8	ipx_tctrl;
	
__be32	ipx_dest_net;
	
__be32	ipx_source_net;
	struct {
		
__be32 netnum;
		
int index;
	
} last_hop;
};

#include <net/sock.h>


struct ipx_sock {
	/* struct sock has to be the first member of ipx_sock */
	
struct sock		sk;
	
struct ipx_address	dest_addr;
	
struct ipx_interface	*intrfc;
	
__be16			port;
#ifdef CONFIG_IPX_INTERN
	
unsigned char		node[IPX_NODE_LEN];
#endif
	
unsigned short		type;
	/*
         * To handle special ncp connection-handling sockets for mars_nwe,
         * the connection number must be stored in the socket.
         */
	
unsigned short		ipx_ncp_conn;
};


static inline struct ipx_sock *ipx_sk(struct sock *sk) { return (struct ipx_sock *)sk; }

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Arnaldo Carvalho de Melo1986.36%150.00%
David S. Miller313.64%150.00%
Total22100.00%2100.00%

#define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0])) #define IPX_MIN_EPHEMERAL_SOCKET 0x4000 #define IPX_MAX_EPHEMERAL_SOCKET 0x7fff extern struct list_head ipx_routes; extern rwlock_t ipx_routes_lock; extern struct list_head ipx_interfaces; struct ipx_interface *ipx_interfaces_head(void); extern spinlock_t ipx_interfaces_lock; extern struct ipx_interface *ipx_primary_net; int ipx_proc_init(void); void ipx_proc_exit(void); const char *ipx_frame_name(__be16); const char *ipx_device_name(struct ipx_interface *intrfc);
static __inline__ void ipxitf_hold(struct ipx_interface *intrfc) { atomic_inc(&intrfc->refcnt); }

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Arnaldo Carvalho de Melo20100.00%1100.00%
Total20100.00%1100.00%

void ipxitf_down(struct ipx_interface *intrfc); struct ipx_interface *ipxitf_find_using_net(__be32 net); int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node); __be16 ipx_cksum(struct ipxhdr *packet, int length); int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc, unsigned char *node); void ipxrtr_del_routes(struct ipx_interface *intrfc); int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, struct msghdr *msg, size_t len, int noblock); int ipxrtr_route_skb(struct sk_buff *skb); struct ipx_route *ipxrtr_lookup(__be32 net); int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
static __inline__ void ipxitf_put(struct ipx_interface *intrfc) { if (atomic_dec_and_test(&intrfc->refcnt)) ipxitf_down(intrfc); }

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static __inline__ void ipxrtr_hold(struct ipx_route *rt) { atomic_inc(&rt->refcnt); }

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Arnaldo Carvalho de Melo20100.00%1100.00%
Total20100.00%1100.00%


static __inline__ void ipxrtr_put(struct ipx_route *rt) { if (atomic_dec_and_test(&rt->refcnt)) kfree(rt); }

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#endif /* _NET_INET_IPX_H_ */

Overall Contributors

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Arnaldo Carvalho de Melo23737.50%926.47%
Linus Torvalds (pre-git)17627.85%1338.24%
Rashika Kheria11918.83%25.88%
David S. Miller436.80%12.94%
Linus Torvalds304.75%25.88%
Al Viro142.22%38.82%
Fabian Frederick50.79%12.94%
Eric Dumazet40.63%12.94%
Tejun Heo30.47%12.94%
Harvey Harrison10.16%12.94%
Total632100.00%34100.00%
Directory: include/net
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