diff options
Diffstat (limited to 'include/linux/divert.h')
| -rw-r--r-- | include/linux/divert.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/include/linux/divert.h b/include/linux/divert.h new file mode 100644 index 0000000..6919b09 --- /dev/null +++ b/include/linux/divert.h @@ -0,0 +1,132 @@ +/* + * 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 __user *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 +#include <linux/netdevice.h> + +int alloc_divert_blk(struct net_device *); +void free_divert_blk(struct net_device *); +int divert_ioctl(unsigned int cmd, struct divert_cf __user *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 */ |
