source: svn/trunk/newcon3bcm2_21bu/toolchain/mipsel-linux-uclibc/include/linux/pkt_cls.h

#ifndef __LINUX_PKT_CLS_H
#define __LINUX_PKT_CLS_H

#include <linux/types.h>

#include <linux/pkt_sched.h>

/* I think i could have done better macros ; for now this is stolen from
 * some arch/mips code - jhs
*/
#define _TC_MAKE32(x) ((x))

#define _TC_MAKEMASK1(n) (_TC_MAKE32(1) << _TC_MAKE32(n))
#define _TC_MAKEMASK(v,n) (_TC_MAKE32((_TC_MAKE32(1)<<(v))-1) << _TC_MAKE32(n))
#define _TC_MAKEVALUE(v,n) (_TC_MAKE32(v) << _TC_MAKE32(n))
#define _TC_GETVALUE(v,n,m) ((_TC_MAKE32(v) & _TC_MAKE32(m)) >> _TC_MAKE32(n))

/* verdict bit breakdown 
 *
bit 0: when set -> this packet has been munged already

bit 1: when set -> It is ok to munge this packet

bit 2,3,4,5: Reclassify counter - sort of reverse TTL - if exceeded
assume loop

bit 6,7: Where this packet was last seen 
0: Above the transmit example at the socket level
1: on the Ingress
2: on the Egress

bit 8: when set --> Request not to classify on ingress. 

bits 9,10,11: redirect counter -  redirect TTL. Loop avoidance

 *
 * */

#define TC_MUNGED          _TC_MAKEMASK1(0)
#define SET_TC_MUNGED(v)   ( TC_MUNGED | (v & ~TC_MUNGED))
#define CLR_TC_MUNGED(v)   ( v & ~TC_MUNGED)

#define TC_OK2MUNGE        _TC_MAKEMASK1(1)
#define SET_TC_OK2MUNGE(v)   ( TC_OK2MUNGE | (v & ~TC_OK2MUNGE))
#define CLR_TC_OK2MUNGE(v)   ( v & ~TC_OK2MUNGE)

#define S_TC_VERD          _TC_MAKE32(2)
#define M_TC_VERD          _TC_MAKEMASK(4,S_TC_VERD)
#define G_TC_VERD(x)       _TC_GETVALUE(x,S_TC_VERD,M_TC_VERD)
#define V_TC_VERD(x)       _TC_MAKEVALUE(x,S_TC_VERD)
#define SET_TC_VERD(v,n)   ((V_TC_VERD(n)) | (v & ~M_TC_VERD))

#define S_TC_FROM          _TC_MAKE32(6)
#define M_TC_FROM          _TC_MAKEMASK(2,S_TC_FROM)
#define G_TC_FROM(x)       _TC_GETVALUE(x,S_TC_FROM,M_TC_FROM)
#define V_TC_FROM(x)       _TC_MAKEVALUE(x,S_TC_FROM)
#define SET_TC_FROM(v,n)   ((V_TC_FROM(n)) | (v & ~M_TC_FROM))
#define AT_STACK        0x0
#define AT_INGRESS      0x1
#define AT_EGRESS       0x2

#define TC_NCLS          _TC_MAKEMASK1(8)
#define SET_TC_NCLS(v)   ( TC_NCLS | (v & ~TC_NCLS))
#define CLR_TC_NCLS(v)   ( v & ~TC_NCLS)

#define S_TC_RTTL          _TC_MAKE32(9)
#define M_TC_RTTL          _TC_MAKEMASK(3,S_TC_RTTL)
#define G_TC_RTTL(x)       _TC_GETVALUE(x,S_TC_RTTL,M_TC_RTTL)
#define V_TC_RTTL(x)       _TC_MAKEVALUE(x,S_TC_RTTL)
#define SET_TC_RTTL(v,n)   ((V_TC_RTTL(n)) | (v & ~M_TC_RTTL))

#define S_TC_AT          _TC_MAKE32(12)
#define M_TC_AT          _TC_MAKEMASK(2,S_TC_AT)
#define G_TC_AT(x)       _TC_GETVALUE(x,S_TC_AT,M_TC_AT)
#define V_TC_AT(x)       _TC_MAKEVALUE(x,S_TC_AT)
#define SET_TC_AT(v,n)   ((V_TC_AT(n)) | (v & ~M_TC_AT))

/* Action attributes */
enum
{
        TCA_ACT_UNSPEC,
        TCA_ACT_KIND,
        TCA_ACT_OPTIONS,
        TCA_ACT_INDEX,
        TCA_ACT_STATS,
        __TCA_ACT_MAX
};

#define TCA_ACT_MAX __TCA_ACT_MAX
#define TCA_OLD_COMPAT (TCA_ACT_MAX+1)
#define TCA_ACT_MAX_PRIO 32
#define TCA_ACT_BIND    1
#define TCA_ACT_NOBIND  0
#define TCA_ACT_UNBIND  1
#define TCA_ACT_NOUNBIND        0
#define TCA_ACT_REPLACE         1
#define TCA_ACT_NOREPLACE       0
#define MAX_REC_LOOP 4
#define MAX_RED_LOOP 4

#define TC_ACT_UNSPEC   (-1)
#define TC_ACT_OK               0
#define TC_ACT_RECLASSIFY       1
#define TC_ACT_SHOT             2
#define TC_ACT_PIPE             3
#define TC_ACT_STOLEN           4
#define TC_ACT_QUEUED           5
#define TC_ACT_REPEAT           6
#define TC_ACT_JUMP             0x10000000

/* Action type identifiers*/
enum
{
        TCA_ID_UNSPEC=0,
        TCA_ID_POLICE=1,
        /* other actions go here */
        __TCA_ID_MAX=255
};

#define TCA_ID_MAX __TCA_ID_MAX

struct tc_police
{
        __u32                   index;
        int                     action;
#define TC_POLICE_UNSPEC        TC_ACT_UNSPEC
#define TC_POLICE_OK            TC_ACT_OK
#define TC_POLICE_RECLASSIFY    TC_ACT_RECLASSIFY
#define TC_POLICE_SHOT          TC_ACT_SHOT
#define TC_POLICE_PIPE          TC_ACT_PIPE

        __u32                   limit;
        __u32                   burst;
        __u32                   mtu;
        struct tc_ratespec      rate;
        struct tc_ratespec      peakrate;
        int                     refcnt;
        int                     bindcnt;
        __u32                   capab;
};

struct tcf_t
{
        __u64   install;
        __u64   lastuse;
        __u64   expires;
};

struct tc_cnt
{
        int                   refcnt; 
        int                   bindcnt;
};

#define tc_gen \
        __u32                 index; \
        __u32                 capab; \
        int                   action; \
        int                   refcnt; \
        int                   bindcnt

enum
{
        TCA_POLICE_UNSPEC,
        TCA_POLICE_TBF,
        TCA_POLICE_RATE,
        TCA_POLICE_PEAKRATE,
        TCA_POLICE_AVRATE,
        TCA_POLICE_RESULT,
        __TCA_POLICE_MAX
#define TCA_POLICE_RESULT TCA_POLICE_RESULT
};

#define TCA_POLICE_MAX (__TCA_POLICE_MAX - 1)

/* U32 filters */

#define TC_U32_HTID(h) ((h)&0xFFF00000)
#define TC_U32_USERHTID(h) (TC_U32_HTID(h)>>20)
#define TC_U32_HASH(h) (((h)>>12)&0xFF)
#define TC_U32_NODE(h) ((h)&0xFFF)
#define TC_U32_KEY(h) ((h)&0xFFFFF)
#define TC_U32_UNSPEC   0
#define TC_U32_ROOT     (0xFFF00000)

enum
{
        TCA_U32_UNSPEC,
        TCA_U32_CLASSID,
        TCA_U32_HASH,
        TCA_U32_LINK,
        TCA_U32_DIVISOR,
        TCA_U32_SEL,
        TCA_U32_POLICE,
        TCA_U32_ACT,   
        TCA_U32_INDEV,
        TCA_U32_PCNT,
        TCA_U32_MARK,
        __TCA_U32_MAX
};

#define TCA_U32_MAX (__TCA_U32_MAX - 1)

struct tc_u32_key
{
        __u32           mask;
        __u32           val;
        int             off;
        int             offmask;
};

struct tc_u32_sel
{
        unsigned char           flags;
        unsigned char           offshift;
        unsigned char           nkeys;

        __u16                   offmask;
        __u16                   off;
        short                   offoff;

        short                   hoff;
        __u32                   hmask;
        struct tc_u32_key       keys[0];
};

struct tc_u32_pcnt
{
        __u64 rcnt;
        __u64 rhit;
        __u64 kcnts[0];
};
/* Flags */

#define TC_U32_TERMINAL         1
#define TC_U32_OFFSET           2
#define TC_U32_VAROFFSET        4
#define TC_U32_EAT              8

#define TC_U32_MAXDEPTH 8


/* RSVP filter */

enum
{
        TCA_RSVP_UNSPEC,
        TCA_RSVP_CLASSID,
        TCA_RSVP_DST,
        TCA_RSVP_SRC,
        TCA_RSVP_PINFO,
        TCA_RSVP_POLICE,
        TCA_RSVP_ACT,
        __TCA_RSVP_MAX
};

#define TCA_RSVP_MAX (__TCA_RSVP_MAX - 1 )

struct tc_rsvp_gpi
{
        __u32   key;
        __u32   mask;
        int     offset;
};

struct tc_rsvp_pinfo
{
        struct tc_rsvp_gpi dpi;
        struct tc_rsvp_gpi spi;
        __u8    protocol;
        __u8    tunnelid;
        __u8    tunnelhdr;
};

/* ROUTE filter */

enum
{
        TCA_ROUTE4_UNSPEC,
        TCA_ROUTE4_CLASSID,
        TCA_ROUTE4_TO,
        TCA_ROUTE4_FROM,
        TCA_ROUTE4_IIF,
        TCA_ROUTE4_POLICE,
        TCA_ROUTE4_ACT,
        __TCA_ROUTE4_MAX
};

#define TCA_ROUTE4_MAX (__TCA_ROUTE4_MAX - 1)


/* FW filter */

enum
{
        TCA_FW_UNSPEC,
        TCA_FW_CLASSID,
        TCA_FW_POLICE,
        TCA_FW_INDEV, /*  used by CONFIG_NET_CLS_IND */
        TCA_FW_ACT, /* used by CONFIG_NET_CLS_ACT */
        __TCA_FW_MAX
};

#define TCA_FW_MAX (__TCA_FW_MAX - 1)

/* TC index filter */

enum
{
        TCA_TCINDEX_UNSPEC,
        TCA_TCINDEX_HASH,
        TCA_TCINDEX_MASK,
        TCA_TCINDEX_SHIFT,
        TCA_TCINDEX_FALL_THROUGH,
        TCA_TCINDEX_CLASSID,
        TCA_TCINDEX_POLICE,
        TCA_TCINDEX_ACT,
        __TCA_TCINDEX_MAX
};

#define TCA_TCINDEX_MAX     (__TCA_TCINDEX_MAX - 1)

/* Basic filter */

enum
{
        TCA_BASIC_UNSPEC,
        TCA_BASIC_CLASSID,
        TCA_BASIC_EMATCHES,
        TCA_BASIC_ACT,
        TCA_BASIC_POLICE,
        __TCA_BASIC_MAX
};

#define TCA_BASIC_MAX (__TCA_BASIC_MAX - 1)

/* Extended Matches */

struct tcf_ematch_tree_hdr
{
        __u16           nmatches;
        __u16           progid;
};

enum
{
        TCA_EMATCH_TREE_UNSPEC,
        TCA_EMATCH_TREE_HDR,
        TCA_EMATCH_TREE_LIST,
        __TCA_EMATCH_TREE_MAX
};
#define TCA_EMATCH_TREE_MAX (__TCA_EMATCH_TREE_MAX - 1)

struct tcf_ematch_hdr
{
        __u16           matchid;
        __u16           kind;
        __u16           flags;
        __u16           pad; /* currently unused */
};

/*  0                   1
 *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 
 * +-----------------------+-+-+---+
 * |         Unused        |S|I| R |
 * +-----------------------+-+-+---+
 *
 * R(2) ::= relation to next ematch
 *          where: 0 0 END (last ematch)
 *                 0 1 AND
 *                 1 0 OR
 *                 1 1 Unused (invalid)
 * I(1) ::= invert result
 * S(1) ::= simple payload
 */
#define TCF_EM_REL_END  0
#define TCF_EM_REL_AND  (1<<0)
#define TCF_EM_REL_OR   (1<<1)
#define TCF_EM_INVERT   (1<<2)
#define TCF_EM_SIMPLE   (1<<3)

#define TCF_EM_REL_MASK 3
#define TCF_EM_REL_VALID(v) (((v) & TCF_EM_REL_MASK) != TCF_EM_REL_MASK)

enum
{
        TCF_LAYER_LINK,
        TCF_LAYER_NETWORK,
        TCF_LAYER_TRANSPORT,
        __TCF_LAYER_MAX
};
#define TCF_LAYER_MAX (__TCF_LAYER_MAX - 1)

/* Ematch type assignments
 *   1..32767           Reserved for ematches inside kernel tree
 *   32768..65535       Free to use, not reliable
 */
enum
{
        TCF_EM_CONTAINER,
        TCF_EM_CMP,
        TCF_EM_NBYTE,
        TCF_EM_U32,
        TCF_EM_META,
        __TCF_EM_MAX
};

enum
{
        TCF_EM_PROG_TC
};

enum
{
        TCF_EM_OPND_EQ,
        TCF_EM_OPND_GT,
        TCF_EM_OPND_LT
};

#endif