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