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tc_linux.go
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tc_linux.go
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package nl
import (
"unsafe"
)
// Message types
const (
TCA_UNSPEC = iota
TCA_KIND
TCA_OPTIONS
TCA_STATS
TCA_XSTATS
TCA_RATE
TCA_FCNT
TCA_STATS2
TCA_STAB
TCA_MAX = TCA_STAB
)
const (
TCA_ACT_TAB = 1
TCAA_MAX = 1
)
const (
TCA_PRIO_UNSPEC = iota
TCA_PRIO_MQ
TCA_PRIO_MAX = TCA_PRIO_MQ
)
const (
SizeofTcMsg = 0x14
SizeofTcActionMsg = 0x04
SizeofTcPrioMap = 0x14
SizeofTcRateSpec = 0x0c
SizeofTcTbfQopt = 2*SizeofTcRateSpec + 0x0c
SizeofTcU32Key = 0x10
SizeofTcU32Sel = 0x10 // without keys
SizeofTcMirred = 0x1c
)
// struct tcmsg {
// unsigned char tcm_family;
// unsigned char tcm__pad1;
// unsigned short tcm__pad2;
// int tcm_ifindex;
// __u32 tcm_handle;
// __u32 tcm_parent;
// __u32 tcm_info;
// };
type TcMsg struct {
Family uint8
Pad [3]byte
Ifindex int32
Handle uint32
Parent uint32
Info uint32
}
func (msg *TcMsg) Len() int {
return SizeofTcMsg
}
func DeserializeTcMsg(b []byte) *TcMsg {
return (*TcMsg)(unsafe.Pointer(&b[0:SizeofTcMsg][0]))
}
func (x *TcMsg) Serialize() []byte {
return (*(*[SizeofTcMsg]byte)(unsafe.Pointer(x)))[:]
}
// struct tcamsg {
// unsigned char tca_family;
// unsigned char tca__pad1;
// unsigned short tca__pad2;
// };
type TcActionMsg struct {
Family uint8
Pad [3]byte
}
func (msg *TcActionMsg) Len() int {
return SizeofTcActionMsg
}
func DeserializeTcActionMsg(b []byte) *TcActionMsg {
return (*TcActionMsg)(unsafe.Pointer(&b[0:SizeofTcActionMsg][0]))
}
func (x *TcActionMsg) Serialize() []byte {
return (*(*[SizeofTcActionMsg]byte)(unsafe.Pointer(x)))[:]
}
const (
TC_PRIO_MAX = 15
)
// struct tc_prio_qopt {
// int bands; /* Number of bands */
// __u8 priomap[TC_PRIO_MAX+1]; /* Map: logical priority -> PRIO band */
// };
type TcPrioMap struct {
Bands int32
Priomap [TC_PRIO_MAX + 1]uint8
}
func (msg *TcPrioMap) Len() int {
return SizeofTcPrioMap
}
func DeserializeTcPrioMap(b []byte) *TcPrioMap {
return (*TcPrioMap)(unsafe.Pointer(&b[0:SizeofTcPrioMap][0]))
}
func (x *TcPrioMap) Serialize() []byte {
return (*(*[SizeofTcPrioMap]byte)(unsafe.Pointer(x)))[:]
}
const (
TCA_TBF_UNSPEC = iota
TCA_TBF_PARMS
TCA_TBF_RTAB
TCA_TBF_PTAB
TCA_TBF_RATE64
TCA_TBF_PRATE64
TCA_TBF_BURST
TCA_TBF_PBURST
TCA_TBF_MAX = TCA_TBF_PBURST
)
// struct tc_ratespec {
// unsigned char cell_log;
// __u8 linklayer; /* lower 4 bits */
// unsigned short overhead;
// short cell_align;
// unsigned short mpu;
// __u32 rate;
// };
type TcRateSpec struct {
CellLog uint8
Linklayer uint8
Overhead uint16
CellAlign int16
Mpu uint16
Rate uint32
}
func (msg *TcRateSpec) Len() int {
return SizeofTcRateSpec
}
func DeserializeTcRateSpec(b []byte) *TcRateSpec {
return (*TcRateSpec)(unsafe.Pointer(&b[0:SizeofTcRateSpec][0]))
}
func (x *TcRateSpec) Serialize() []byte {
return (*(*[SizeofTcRateSpec]byte)(unsafe.Pointer(x)))[:]
}
// struct tc_tbf_qopt {
// struct tc_ratespec rate;
// struct tc_ratespec peakrate;
// __u32 limit;
// __u32 buffer;
// __u32 mtu;
// };
type TcTbfQopt struct {
Rate TcRateSpec
Peakrate TcRateSpec
Limit uint32
Buffer uint32
Mtu uint32
}
func (msg *TcTbfQopt) Len() int {
return SizeofTcTbfQopt
}
func DeserializeTcTbfQopt(b []byte) *TcTbfQopt {
return (*TcTbfQopt)(unsafe.Pointer(&b[0:SizeofTcTbfQopt][0]))
}
func (x *TcTbfQopt) Serialize() []byte {
return (*(*[SizeofTcTbfQopt]byte)(unsafe.Pointer(x)))[:]
}
const (
TCA_U32_UNSPEC = iota
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 = TCA_U32_MARK
)
// struct tc_u32_key {
// __be32 mask;
// __be32 val;
// int off;
// int offmask;
// };
type TcU32Key struct {
Mask uint32 // big endian
Val uint32 // big endian
Off int32
OffMask int32
}
func (msg *TcU32Key) Len() int {
return SizeofTcU32Key
}
func DeserializeTcU32Key(b []byte) *TcU32Key {
return (*TcU32Key)(unsafe.Pointer(&b[0:SizeofTcU32Key][0]))
}
func (x *TcU32Key) Serialize() []byte {
return (*(*[SizeofTcU32Key]byte)(unsafe.Pointer(x)))[:]
}
// struct tc_u32_sel {
// unsigned char flags;
// unsigned char offshift;
// unsigned char nkeys;
//
// __be16 offmask;
// __u16 off;
// short offoff;
//
// short hoff;
// __be32 hmask;
// struct tc_u32_key keys[0];
// };
const (
TC_U32_TERMINAL = 1 << iota
TC_U32_OFFSET = 1 << iota
TC_U32_VAROFFSET = 1 << iota
TC_U32_EAT = 1 << iota
)
type TcU32Sel struct {
Flags uint8
Offshift uint8
Nkeys uint8
Pad uint8
Offmask uint16 // big endian
Off uint16
Offoff int16
Hoff int16
Hmask uint32 // big endian
Keys []TcU32Key
}
func (msg *TcU32Sel) Len() int {
return SizeofTcU32Sel + int(msg.Nkeys)*SizeofTcU32Key
}
func DeserializeTcU32Sel(b []byte) *TcU32Sel {
x := &TcU32Sel{}
copy((*(*[SizeofTcU32Sel]byte)(unsafe.Pointer(x)))[:], b)
next := SizeofTcU32Sel
var i uint8
for i = 0; i < x.Nkeys; i++ {
x.Keys = append(x.Keys, *DeserializeTcU32Key(b[next:]))
next += SizeofTcU32Key
}
return x
}
func (x *TcU32Sel) Serialize() []byte {
// This can't just unsafe.cast because it must iterate through keys.
buf := make([]byte, x.Len())
copy(buf, (*(*[SizeofTcU32Sel]byte)(unsafe.Pointer(x)))[:])
next := SizeofTcU32Sel
for _, key := range x.Keys {
keyBuf := key.Serialize()
copy(buf[next:], keyBuf)
next += SizeofTcU32Key
}
return buf
}
const (
TCA_ACT_MIRRED = 8
)
const (
TCA_MIRRED_UNSPEC = iota
TCA_MIRRED_TM
TCA_MIRRED_PARMS
TCA_MIRRED_MAX = TCA_MIRRED_PARMS
)
const (
TCA_EGRESS_REDIR = 1 /* packet redirect to EGRESS*/
TCA_EGRESS_MIRROR = 2 /* mirror packet to EGRESS */
TCA_INGRESS_REDIR = 3 /* packet redirect to INGRESS*/
TCA_INGRESS_MIRROR = 4 /* mirror packet to INGRESS */
)
const (
TC_ACT_UNSPEC = int32(-1)
TC_ACT_OK = 0
TC_ACT_RECLASSIFY = 1
TC_ACT_SHOT = 2
TC_ACT_PIPE = 3
TC_ACT_STOLEN = 4
TC_ACT_QUEUED = 5
TC_ACT_REPEAT = 6
TC_ACT_JUMP = 0x10000000
)
// #define tc_gen \
// __u32 index; \
// __u32 capab; \
// int action; \
// int refcnt; \
// int bindcnt
// struct tc_mirred {
// tc_gen;
// int eaction; /* one of IN/EGRESS_MIRROR/REDIR */
// __u32 ifindex; /* ifindex of egress port */
// };
type TcMirred struct {
Index uint32
Capab uint32
Action int32
Refcnt int32
Bindcnt int32
Eaction int32
Ifindex uint32
}
func (msg *TcMirred) Len() int {
return SizeofTcMirred
}
func DeserializeTcMirred(b []byte) *TcMirred {
return (*TcMirred)(unsafe.Pointer(&b[0:SizeofTcMirred][0]))
}
func (x *TcMirred) Serialize() []byte {
return (*(*[SizeofTcMirred]byte)(unsafe.Pointer(x)))[:]
}