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feat: dns routing (#26)

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This commit is contained in:
mzz
2023-02-25 02:38:21 +08:00
committed by GitHub
parent 33ad434f8a
commit 8bd6a77398
48 changed files with 2758 additions and 1449 deletions
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14
pkg/ebpf_internal/rawsock.go
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@ -3,18 +3,26 @@
package internal
import (
"github.com/v2rayA/dae/common"
"encoding/binary"
"syscall"
"unsafe"
)
// Htons converts the unsigned short integer hostshort from host byte order to network byte order.
func Htons(i uint16) uint16 {
b := make([]byte, 2)
binary.BigEndian.PutUint16(b, i)
return *(*uint16)(unsafe.Pointer(&b[0]))
}
func OpenRawSock(index int) (int, error) {
sock, err := syscall.Socket(syscall.AF_PACKET, syscall.SOCK_RAW|syscall.SOCK_NONBLOCK|syscall.SOCK_CLOEXEC, int(common.Htons(syscall.ETH_P_ALL)))
sock, err := syscall.Socket(syscall.AF_PACKET, syscall.SOCK_RAW|syscall.SOCK_NONBLOCK|syscall.SOCK_CLOEXEC, int(Htons(syscall.ETH_P_ALL)))
if err != nil {
return 0, err
}
sll := syscall.SockaddrLinklayer{
Ifindex: index,
Protocol: common.Htons(syscall.ETH_P_ALL),
Protocol: Htons(syscall.ETH_P_ALL),
}
if err := syscall.Bind(sock, &sll); err != nil {
return 0, err