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/*
* Frame Diversion, Benoit Locher <Benoit.Locher@skf.com>
*
* Changes:
* 06/09/2000 BL: initial version
*
*/
#ifndef _LINUX_DIVERT_H
#define _LINUX_DIVERT_H
#include <asm/types.h>
#define MAX_DIVERT_PORTS 8 /* Max number of ports to divert (tcp, udp) */
/* Divertable protocols */
#define DIVERT_PROTO_NONE 0x0000
#define DIVERT_PROTO_IP 0x0001
#define DIVERT_PROTO_ICMP 0x0002
#define DIVERT_PROTO_TCP 0x0004
#define DIVERT_PROTO_UDP 0x0008
/*
* This is an Ethernet Frame Diverter option block
*/
struct divert_blk
{
int divert; /* are we active */
unsigned int protos; /* protocols */
u16 tcp_dst[MAX_DIVERT_PORTS]; /* specific tcp dst ports to divert */
u16 tcp_src[MAX_DIVERT_PORTS]; /* specific tcp src ports to divert */
u16 udp_dst[MAX_DIVERT_PORTS]; /* specific udp dst ports to divert */
u16 udp_src[MAX_DIVERT_PORTS]; /* specific udp src ports to divert */
};
/*
* Diversion control block, for configuration with the userspace tool
* divert
*/
typedef union _divert_cf_arg
{
s16 int16;
u16 uint16;
s32 int32;
u32 uint32;
s64 int64;
u64 uint64;
void *ptr;
} divert_cf_arg;
struct divert_cf
{
int cmd; /* Command */
divert_cf_arg arg1,
arg2,
arg3;
int dev_index; /* device index (eth0=0, etc...) */
};
/* Diversion commands */
#define DIVCMD_DIVERT 1 /* ENABLE/DISABLE diversion */
#define DIVCMD_IP 2 /* ENABLE/DISABLE whold IP diversion */
#define DIVCMD_TCP 3 /* ENABLE/DISABLE whold TCP diversion */
#define DIVCMD_TCPDST 4 /* ADD/REMOVE TCP DST port for diversion */
#define DIVCMD_TCPSRC 5 /* ADD/REMOVE TCP SRC port for diversion */
#define DIVCMD_UDP 6 /* ENABLE/DISABLE whole UDP diversion */
#define DIVCMD_UDPDST 7 /* ADD/REMOVE UDP DST port for diversion */
#define DIVCMD_UDPSRC 8 /* ADD/REMOVE UDP SRC port for diversion */
#define DIVCMD_ICMP 9 /* ENABLE/DISABLE whole ICMP diversion */
#define DIVCMD_GETSTATUS 10 /* GET the status of the diverter */
#define DIVCMD_RESET 11 /* Reset the diverter on the specified dev */
#define DIVCMD_GETVERSION 12 /* Retrieve the diverter code version (char[32]) */
/* General syntax of the commands:
*
* DIVCMD_xxxxxx(arg1, arg2, arg3, dev_index)
*
* SIOCSIFDIVERT:
* DIVCMD_DIVERT(DIVARG1_ENABLE|DIVARG1_DISABLE, , ,ifindex)
* DIVCMD_IP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex)
* DIVCMD_TCP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex)
* DIVCMD_TCPDST(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex)
* DIVCMD_TCPSRC(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex)
* DIVCMD_UDP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex)
* DIVCMD_UDPDST(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex)
* DIVCMD_UDPSRC(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex)
* DIVCMD_ICMP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex)
* DIVCMD_RESET(, , , ifindex)
*
* SIOGIFDIVERT:
* DIVCMD_GETSTATUS(divert_blk, , , ifindex)
* DIVCMD_GETVERSION(string[3])
*/
/* Possible values for arg1 */
#define DIVARG1_ENABLE 0 /* ENABLE something */
#define DIVARG1_DISABLE 1 /* DISABLE something */
#define DIVARG1_ADD 2 /* ADD something */
#define DIVARG1_REMOVE 3 /* REMOVE something */
#ifdef __KERNEL__
/* diverter functions */
#include <linux/skbuff.h>
#ifdef CONFIG_NET_DIVERT
int alloc_divert_blk(struct net_device *);
void free_divert_blk(struct net_device *);
int divert_ioctl(unsigned int cmd, struct divert_cf *arg);
void divert_frame(struct sk_buff *skb);
static inline void handle_diverter(struct sk_buff *skb)
{
/* if diversion is supported on device, then divert */
if (skb->dev->divert && skb->dev->divert->divert)
divert_frame(skb);
}
#else
# define alloc_divert_blk(dev) (0)
# define free_divert_blk(dev) do {} while (0)
# define divert_ioctl(cmd, arg) (-ENOPKG)
# define handle_diverter(skb) do {} while (0)
#endif
#endif
#endif /* _LINUX_DIVERT_H */
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