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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * Frame Diversion, Benoit Locher <Benoit.Locher@skf.com> |
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| 3 | * |
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| 4 | * Changes: |
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| 5 | * 06/09/2000 BL: initial version |
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| 6 | * |
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| 7 | */ |
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| 8 | |||
| 9 | #ifndef _LINUX_DIVERT_H |
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| 10 | #define _LINUX_DIVERT_H |
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| 11 | |||
| 12 | #include <asm/types.h> |
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| 13 | |||
| 14 | #define MAX_DIVERT_PORTS 8 /* Max number of ports to divert (tcp, udp) */ |
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| 15 | |||
| 16 | /* Divertable protocols */ |
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| 17 | #define DIVERT_PROTO_NONE 0x0000 |
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| 18 | #define DIVERT_PROTO_IP 0x0001 |
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| 19 | #define DIVERT_PROTO_ICMP 0x0002 |
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| 20 | #define DIVERT_PROTO_TCP 0x0004 |
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| 21 | #define DIVERT_PROTO_UDP 0x0008 |
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| 22 | |||
| 23 | /* |
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| 24 | * This is an Ethernet Frame Diverter option block |
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| 25 | */ |
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| 26 | struct divert_blk |
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| 27 | { |
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| 28 | int divert; /* are we active */ |
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| 29 | unsigned int protos; /* protocols */ |
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| 30 | u16 tcp_dst[MAX_DIVERT_PORTS]; /* specific tcp dst ports to divert */ |
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| 31 | u16 tcp_src[MAX_DIVERT_PORTS]; /* specific tcp src ports to divert */ |
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| 32 | u16 udp_dst[MAX_DIVERT_PORTS]; /* specific udp dst ports to divert */ |
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| 33 | u16 udp_src[MAX_DIVERT_PORTS]; /* specific udp src ports to divert */ |
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| 34 | }; |
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| 35 | |||
| 36 | /* |
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| 37 | * Diversion control block, for configuration with the userspace tool |
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| 38 | * divert |
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| 39 | */ |
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| 40 | |||
| 41 | typedef union _divert_cf_arg |
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| 42 | { |
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| 43 | s16 int16; |
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| 44 | u16 uint16; |
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| 45 | s32 int32; |
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| 46 | u32 uint32; |
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| 47 | s64 int64; |
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| 48 | u64 uint64; |
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| 49 | void *ptr; |
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| 50 | } divert_cf_arg; |
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| 51 | |||
| 52 | |||
| 53 | struct divert_cf |
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| 54 | { |
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| 55 | int cmd; /* Command */ |
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| 56 | divert_cf_arg arg1, |
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| 57 | arg2, |
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| 58 | arg3; |
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| 59 | int dev_index; /* device index (eth0=0, etc...) */ |
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| 60 | }; |
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| 61 | |||
| 62 | |||
| 63 | /* Diversion commands */ |
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| 64 | #define DIVCMD_DIVERT 1 /* ENABLE/DISABLE diversion */ |
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| 65 | #define DIVCMD_IP 2 /* ENABLE/DISABLE whold IP diversion */ |
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| 66 | #define DIVCMD_TCP 3 /* ENABLE/DISABLE whold TCP diversion */ |
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| 67 | #define DIVCMD_TCPDST 4 /* ADD/REMOVE TCP DST port for diversion */ |
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| 68 | #define DIVCMD_TCPSRC 5 /* ADD/REMOVE TCP SRC port for diversion */ |
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| 69 | #define DIVCMD_UDP 6 /* ENABLE/DISABLE whole UDP diversion */ |
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| 70 | #define DIVCMD_UDPDST 7 /* ADD/REMOVE UDP DST port for diversion */ |
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| 71 | #define DIVCMD_UDPSRC 8 /* ADD/REMOVE UDP SRC port for diversion */ |
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| 72 | #define DIVCMD_ICMP 9 /* ENABLE/DISABLE whole ICMP diversion */ |
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| 73 | #define DIVCMD_GETSTATUS 10 /* GET the status of the diverter */ |
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| 74 | #define DIVCMD_RESET 11 /* Reset the diverter on the specified dev */ |
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| 75 | #define DIVCMD_GETVERSION 12 /* Retrieve the diverter code version (char[32]) */ |
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| 76 | |||
| 77 | /* General syntax of the commands: |
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| 78 | * |
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| 79 | * DIVCMD_xxxxxx(arg1, arg2, arg3, dev_index) |
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| 80 | * |
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| 81 | * SIOCSIFDIVERT: |
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| 82 | * DIVCMD_DIVERT(DIVARG1_ENABLE|DIVARG1_DISABLE, , ,ifindex) |
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| 83 | * DIVCMD_IP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex) |
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| 84 | * DIVCMD_TCP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex) |
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| 85 | * DIVCMD_TCPDST(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex) |
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| 86 | * DIVCMD_TCPSRC(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex) |
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| 87 | * DIVCMD_UDP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex) |
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| 88 | * DIVCMD_UDPDST(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex) |
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| 89 | * DIVCMD_UDPSRC(DIVARG1_ADD|DIVARG1_REMOVE, port, , ifindex) |
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| 90 | * DIVCMD_ICMP(DIVARG1_ENABLE|DIVARG1_DISABLE, , , ifindex) |
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| 91 | * DIVCMD_RESET(, , , ifindex) |
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| 92 | * |
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| 93 | * SIOGIFDIVERT: |
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| 94 | * DIVCMD_GETSTATUS(divert_blk, , , ifindex) |
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| 95 | * DIVCMD_GETVERSION(string[3]) |
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| 96 | */ |
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| 97 | |||
| 98 | |||
| 99 | /* Possible values for arg1 */ |
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| 100 | #define DIVARG1_ENABLE 0 /* ENABLE something */ |
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| 101 | #define DIVARG1_DISABLE 1 /* DISABLE something */ |
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| 102 | #define DIVARG1_ADD 2 /* ADD something */ |
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| 103 | #define DIVARG1_REMOVE 3 /* REMOVE something */ |
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| 104 | |||
| 105 | |||
| 106 | #ifdef __KERNEL__ |
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| 107 | |||
| 108 | /* diverter functions */ |
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| 109 | #include <linux/skbuff.h> |
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| 110 | |||
| 111 | #ifdef CONFIG_NET_DIVERT |
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| 112 | int alloc_divert_blk(struct net_device *); |
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| 113 | void free_divert_blk(struct net_device *); |
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| 114 | int divert_ioctl(unsigned int cmd, struct divert_cf *arg); |
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| 115 | void divert_frame(struct sk_buff *skb); |
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| 116 | static inline void handle_diverter(struct sk_buff *skb) |
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| 117 | { |
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| 118 | /* if diversion is supported on device, then divert */ |
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| 119 | if (skb->dev->divert && skb->dev->divert->divert) |
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| 120 | divert_frame(skb); |
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| 121 | } |
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| 122 | |||
| 123 | #else |
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| 124 | # define alloc_divert_blk(dev) (0) |
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| 125 | # define free_divert_blk(dev) do {} while (0) |
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| 126 | # define divert_ioctl(cmd, arg) (-ENOPKG) |
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| 127 | # define handle_diverter(skb) do {} while (0) |
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| 128 | #endif |
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| 129 | #endif |
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| 130 | #endif /* _LINUX_DIVERT_H */ |