| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Frame Diversion, Benoit Locher <Benoit.Locher@skf.com> |
| 3 | * |
| 4 | * Changes: |
| 5 | * 06/09/2000 BL: initial version |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | #ifndef _LINUX_DIVERT_H |
| 10 | #define _LINUX_DIVERT_H |
| 11 | |
| 12 | #include <asm/types.h> |
| 13 | |
| 14 | #define MAX_DIVERT_PORTS 8 /* Max number of ports to divert (tcp, udp) */ |
| 15 | |
| 16 | /* Divertable protocols */ |
| 17 | #define DIVERT_PROTO_NONE 0x0000 |
| 18 | #define DIVERT_PROTO_IP 0x0001 |
| 19 | #define DIVERT_PROTO_ICMP 0x0002 |
| 20 | #define DIVERT_PROTO_TCP 0x0004 |
| 21 | #define DIVERT_PROTO_UDP 0x0008 |
| 22 | |
| 23 | /* |
| 24 | * This is an Ethernet Frame Diverter option block |
| 25 | */ |
| 26 | struct divert_blk |
| 27 | { |
| 28 | int divert; /* are we active */ |
| 29 | unsigned int protos; /* protocols */ |
| 30 | u16 tcp_dst[MAX_DIVERT_PORTS]; /* specific tcp dst ports to divert */ |
| 31 | u16 tcp_src[MAX_DIVERT_PORTS]; /* specific tcp src ports to divert */ |
| 32 | u16 udp_dst[MAX_DIVERT_PORTS]; /* specific udp dst ports to divert */ |
| 33 | u16 udp_src[MAX_DIVERT_PORTS]; /* specific udp src ports to divert */ |
| 34 | }; |
| 35 | |
| 36 | /* |
| 37 | * Diversion control block, for configuration with the userspace tool |
| 38 | * divert |
| 39 | */ |
| 40 | |
| 41 | typedef union _divert_cf_arg |
| 42 | { |
| 43 | s16 int16; |
| 44 | u16 uint16; |
| 45 | s32 int32; |
| 46 | u32 uint32; |
| 47 | s64 int64; |
| 48 | u64 uint64; |
| 49 | void __user *ptr; |
| 50 | } divert_cf_arg; |
| 51 | |
| 52 | |
| 53 | struct divert_cf |
| 54 | { |
| 55 | int cmd; /* Command */ |
| 56 | divert_cf_arg arg1, |
| 57 | arg2, |
| 58 | arg3; |
| 59 | int dev_index; /* device index (eth0=0, etc...) */ |
| 60 | }; |
| 61 | |
| 62 | |
| 63 | /* Diversion commands */ |
| 64 | #define DIVCMD_DIVERT 1 /* ENABLE/DISABLE diversion */ |
| 65 | #define DIVCMD_IP 2 /* ENABLE/DISABLE whold IP diversion */ |
| 66 | #define DIVCMD_TCP 3 /* ENABLE/DISABLE whold TCP diversion */ |
| 67 | #define DIVCMD_TCPDST 4 /* ADD/REMOVE TCP DST port for diversion */ |
| 68 | #define DIVCMD_TCPSRC 5 /* ADD/REMOVE TCP SRC port for diversion */ |
| 69 | #define DIVCMD_UDP 6 /* ENABLE/DISABLE whole UDP diversion */ |
| 70 | #define DIVCMD_UDPDST 7 /* ADD/REMOVE UDP DST port for diversion */ |
| 71 | #define DIVCMD_UDPSRC 8 /* ADD/REMOVE UDP SRC port for diversion */ |
| 72 | #define DIVCMD_ICMP 9 /* ENABLE/DISABLE whole ICMP diversion */ |
| 73 | #define DIVCMD_GETSTATUS 10 /* GET the status of the diverter */ |
| 74 | #define DIVCMD_RESET 11 /* Reset the diverter on the specified dev */ |
| 75 | #define DIVCMD_GETVERSION 12 /* Retrieve the diverter code version (char[32]) */ |
| 76 | |
| 77 | /* General syntax of the commands: |
| 78 | * |
| 79 | * DIVCMD_xxxxxx(arg1, arg2, arg3, dev_index) |
| 80 | * |
| 81 | * SIOCSIFDIVERT: |
| 82 | * DIVCMD_DIVERT(DIVARG1_ENABLE|DIVARG1_DISABLE, , ,ifindex) |
| 83 | * DIVCMD_IP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex) |
| 84 | * DIVCMD_TCP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex) |
| 85 | * DIVCMD_TCPDST(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex) |
| 86 | * DIVCMD_TCPSRC(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex) |
| 87 | * DIVCMD_UDP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex) |
| 88 | * DIVCMD_UDPDST(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex) |
| 89 | * DIVCMD_UDPSRC(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex) |
| 90 | * DIVCMD_ICMP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex) |
| 91 | * DIVCMD_RESET(, , , ifindex) |
| 92 | * |
| 93 | * SIOGIFDIVERT: |
| 94 | * DIVCMD_GETSTATUS(divert_blk, , , ifindex) |
| 95 | * DIVCMD_GETVERSION(string[3]) |
| 96 | */ |
| 97 | |
| 98 | |
| 99 | /* Possible values for arg1 */ |
| 100 | #define DIVARG1_ENABLE 0 /* ENABLE something */ |
| 101 | #define DIVARG1_DISABLE 1 /* DISABLE something */ |
| 102 | #define DIVARG1_ADD 2 /* ADD something */ |
| 103 | #define DIVARG1_REMOVE 3 /* REMOVE something */ |
| 104 | |
| 105 | |
| 106 | #ifdef __KERNEL__ |
| 107 | |
| 108 | /* diverter functions */ |
| 109 | #include <linux/skbuff.h> |
| 110 | |
| 111 | #ifdef CONFIG_NET_DIVERT |
| 112 | #include <linux/netdevice.h> |
| 113 | |
| 114 | int alloc_divert_blk(struct net_device *); |
| 115 | void free_divert_blk(struct net_device *); |
| 116 | int divert_ioctl(unsigned int cmd, struct divert_cf __user *arg); |
| 117 | void divert_frame(struct sk_buff *skb); |
| 118 | static inline void handle_diverter(struct sk_buff *skb) |
| 119 | { |
| 120 | /* if diversion is supported on device, then divert */ |
| 121 | if (skb->dev->divert && skb->dev->divert->divert) |
| 122 | divert_frame(skb); |
| 123 | } |
| 124 | |
| 125 | #else |
| 126 | # define alloc_divert_blk(dev) (0) |
| 127 | # define free_divert_blk(dev) do {} while (0) |
| 128 | # define divert_ioctl(cmd, arg) (-ENOPKG) |
| 129 | # define handle_diverter(skb) do {} while (0) |
| 130 | #endif |
| 131 | #endif |
| 132 | #endif /* _LINUX_DIVERT_H */ |