259 lines
6.2 KiB
Go
259 lines
6.2 KiB
Go
package nl
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import (
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"bytes"
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"net"
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"unsafe"
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)
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// Infinity for packet and byte counts
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const (
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XFRM_INF = ^uint64(0)
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)
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// Message Types
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const (
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XFRM_MSG_BASE = 0x10
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XFRM_MSG_NEWSA = 0x10
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XFRM_MSG_DELSA = 0x11
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XFRM_MSG_GETSA = 0x12
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XFRM_MSG_NEWPOLICY = 0x13
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XFRM_MSG_DELPOLICY = 0x14
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XFRM_MSG_GETPOLICY = 0x15
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XFRM_MSG_ALLOCSPI = 0x16
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XFRM_MSG_ACQUIRE = 0x17
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XFRM_MSG_EXPIRE = 0x18
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XFRM_MSG_UPDPOLICY = 0x19
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XFRM_MSG_UPDSA = 0x1a
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XFRM_MSG_POLEXPIRE = 0x1b
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XFRM_MSG_FLUSHSA = 0x1c
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XFRM_MSG_FLUSHPOLICY = 0x1d
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XFRM_MSG_NEWAE = 0x1e
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XFRM_MSG_GETAE = 0x1f
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XFRM_MSG_REPORT = 0x20
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XFRM_MSG_MIGRATE = 0x21
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XFRM_MSG_NEWSADINFO = 0x22
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XFRM_MSG_GETSADINFO = 0x23
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XFRM_MSG_NEWSPDINFO = 0x24
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XFRM_MSG_GETSPDINFO = 0x25
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XFRM_MSG_MAPPING = 0x26
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XFRM_MSG_MAX = 0x26
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XFRM_NR_MSGTYPES = 0x17
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)
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// Attribute types
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const (
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/* Netlink message attributes. */
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XFRMA_UNSPEC = 0x00
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XFRMA_ALG_AUTH = 0x01 /* struct xfrm_algo */
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XFRMA_ALG_CRYPT = 0x02 /* struct xfrm_algo */
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XFRMA_ALG_COMP = 0x03 /* struct xfrm_algo */
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XFRMA_ENCAP = 0x04 /* struct xfrm_algo + struct xfrm_encap_tmpl */
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XFRMA_TMPL = 0x05 /* 1 or more struct xfrm_user_tmpl */
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XFRMA_SA = 0x06 /* struct xfrm_usersa_info */
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XFRMA_POLICY = 0x07 /* struct xfrm_userpolicy_info */
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XFRMA_SEC_CTX = 0x08 /* struct xfrm_sec_ctx */
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XFRMA_LTIME_VAL = 0x09
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XFRMA_REPLAY_VAL = 0x0a
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XFRMA_REPLAY_THRESH = 0x0b
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XFRMA_ETIMER_THRESH = 0x0c
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XFRMA_SRCADDR = 0x0d /* xfrm_address_t */
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XFRMA_COADDR = 0x0e /* xfrm_address_t */
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XFRMA_LASTUSED = 0x0f /* unsigned long */
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XFRMA_POLICY_TYPE = 0x10 /* struct xfrm_userpolicy_type */
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XFRMA_MIGRATE = 0x11
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XFRMA_ALG_AEAD = 0x12 /* struct xfrm_algo_aead */
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XFRMA_KMADDRESS = 0x13 /* struct xfrm_user_kmaddress */
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XFRMA_ALG_AUTH_TRUNC = 0x14 /* struct xfrm_algo_auth */
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XFRMA_MARK = 0x15 /* struct xfrm_mark */
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XFRMA_TFCPAD = 0x16 /* __u32 */
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XFRMA_REPLAY_ESN_VAL = 0x17 /* struct xfrm_replay_esn */
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XFRMA_SA_EXTRA_FLAGS = 0x18 /* __u32 */
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XFRMA_MAX = 0x18
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)
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const (
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SizeofXfrmAddress = 0x10
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SizeofXfrmSelector = 0x38
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SizeofXfrmLifetimeCfg = 0x40
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SizeofXfrmLifetimeCur = 0x20
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SizeofXfrmId = 0x18
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)
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// typedef union {
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// __be32 a4;
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// __be32 a6[4];
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// } xfrm_address_t;
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type XfrmAddress [SizeofXfrmAddress]byte
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func (x *XfrmAddress) ToIP() net.IP {
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var empty = [12]byte{}
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ip := make(net.IP, net.IPv6len)
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if bytes.Equal(x[4:16], empty[:]) {
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ip[10] = 0xff
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ip[11] = 0xff
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copy(ip[12:16], x[0:4])
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} else {
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copy(ip[:], x[:])
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}
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return ip
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}
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func (x *XfrmAddress) ToIPNet(prefixlen uint8) *net.IPNet {
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ip := x.ToIP()
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if GetIPFamily(ip) == FAMILY_V4 {
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return &net.IPNet{IP: ip, Mask: net.CIDRMask(int(prefixlen), 32)}
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}
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return &net.IPNet{IP: ip, Mask: net.CIDRMask(int(prefixlen), 128)}
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}
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func (x *XfrmAddress) FromIP(ip net.IP) {
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var empty = [16]byte{}
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if len(ip) < net.IPv4len {
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copy(x[4:16], empty[:])
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} else if GetIPFamily(ip) == FAMILY_V4 {
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copy(x[0:4], ip.To4()[0:4])
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copy(x[4:16], empty[:12])
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} else {
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copy(x[0:16], ip.To16()[0:16])
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}
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}
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func DeserializeXfrmAddress(b []byte) *XfrmAddress {
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return (*XfrmAddress)(unsafe.Pointer(&b[0:SizeofXfrmAddress][0]))
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}
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func (x *XfrmAddress) Serialize() []byte {
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return (*(*[SizeofXfrmAddress]byte)(unsafe.Pointer(x)))[:]
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}
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// struct xfrm_selector {
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// xfrm_address_t daddr;
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// xfrm_address_t saddr;
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// __be16 dport;
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// __be16 dport_mask;
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// __be16 sport;
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// __be16 sport_mask;
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// __u16 family;
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// __u8 prefixlen_d;
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// __u8 prefixlen_s;
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// __u8 proto;
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// int ifindex;
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// __kernel_uid32_t user;
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// };
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type XfrmSelector struct {
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Daddr XfrmAddress
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Saddr XfrmAddress
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Dport uint16 // big endian
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DportMask uint16 // big endian
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Sport uint16 // big endian
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SportMask uint16 // big endian
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Family uint16
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PrefixlenD uint8
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PrefixlenS uint8
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Proto uint8
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Pad [3]byte
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Ifindex int32
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User uint32
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}
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func (msg *XfrmSelector) Len() int {
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return SizeofXfrmSelector
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}
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func DeserializeXfrmSelector(b []byte) *XfrmSelector {
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return (*XfrmSelector)(unsafe.Pointer(&b[0:SizeofXfrmSelector][0]))
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}
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func (msg *XfrmSelector) Serialize() []byte {
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return (*(*[SizeofXfrmSelector]byte)(unsafe.Pointer(msg)))[:]
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}
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// struct xfrm_lifetime_cfg {
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// __u64 soft_byte_limit;
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// __u64 hard_byte_limit;
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// __u64 soft_packet_limit;
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// __u64 hard_packet_limit;
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// __u64 soft_add_expires_seconds;
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// __u64 hard_add_expires_seconds;
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// __u64 soft_use_expires_seconds;
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// __u64 hard_use_expires_seconds;
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// };
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//
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type XfrmLifetimeCfg struct {
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SoftByteLimit uint64
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HardByteLimit uint64
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SoftPacketLimit uint64
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HardPacketLimit uint64
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SoftAddExpiresSeconds uint64
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HardAddExpiresSeconds uint64
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SoftUseExpiresSeconds uint64
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HardUseExpiresSeconds uint64
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}
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func (msg *XfrmLifetimeCfg) Len() int {
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return SizeofXfrmLifetimeCfg
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}
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func DeserializeXfrmLifetimeCfg(b []byte) *XfrmLifetimeCfg {
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return (*XfrmLifetimeCfg)(unsafe.Pointer(&b[0:SizeofXfrmLifetimeCfg][0]))
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}
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func (msg *XfrmLifetimeCfg) Serialize() []byte {
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return (*(*[SizeofXfrmLifetimeCfg]byte)(unsafe.Pointer(msg)))[:]
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}
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// struct xfrm_lifetime_cur {
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// __u64 bytes;
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// __u64 packets;
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// __u64 add_time;
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// __u64 use_time;
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// };
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type XfrmLifetimeCur struct {
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Bytes uint64
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Packets uint64
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AddTime uint64
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UseTime uint64
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}
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func (msg *XfrmLifetimeCur) Len() int {
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return SizeofXfrmLifetimeCur
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}
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func DeserializeXfrmLifetimeCur(b []byte) *XfrmLifetimeCur {
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return (*XfrmLifetimeCur)(unsafe.Pointer(&b[0:SizeofXfrmLifetimeCur][0]))
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}
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func (msg *XfrmLifetimeCur) Serialize() []byte {
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return (*(*[SizeofXfrmLifetimeCur]byte)(unsafe.Pointer(msg)))[:]
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}
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// struct xfrm_id {
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// xfrm_address_t daddr;
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// __be32 spi;
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// __u8 proto;
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// };
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type XfrmId struct {
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Daddr XfrmAddress
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Spi uint32 // big endian
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Proto uint8
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Pad [3]byte
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}
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func (msg *XfrmId) Len() int {
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return SizeofXfrmId
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}
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func DeserializeXfrmId(b []byte) *XfrmId {
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return (*XfrmId)(unsafe.Pointer(&b[0:SizeofXfrmId][0]))
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}
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func (msg *XfrmId) Serialize() []byte {
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return (*(*[SizeofXfrmId]byte)(unsafe.Pointer(msg)))[:]
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}
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