1 files changed, 132 insertions, 0 deletions

diff --git a/include/linux/divert.h b/include/linux/divert.h
new file mode 100644
index 000000000000..6919b09133d4
--- /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 */