feat: 实现路由添加

core/route/route.go

@@ -0,0 +1 @@
+package route

core/route/route_linux.go

@@ -0,0 +1,56 @@
+package route
+
+import (
+	"NetHive/pkgs/system"
+	"net"
+	"net/netip"
+	"syscall"
+	"unsafe"
+)
+
+type RtEntry struct {
+	_       uint64
+	Dst     syscall.RawSockaddrInet4
+	Gateway syscall.RawSockaddrInet4
+	GenMask syscall.RawSockaddrInet4
+	Flags   uint16
+	_       uint16
+	_       uint64
+	Tos     byte
+	Class   byte
+	_       [3]uint16
+	Metric  int16
+	Dev     uintptr
+	Mtu     uint64
+	Window  uint64
+	IRtt    uint16
+}
+
+func Add(dev string, target netip.Prefix) error {
+	fd, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_DGRAM, 0)
+	if err != nil {
+		return err
+	}
+	defer syscall.Close(fd)
+
+	_, cidr, err := net.ParseCIDR(target.String())
+	if err != nil {
+		return err
+	}
+	mask := cidr.Mask
+
+	rt := RtEntry{}
+	rt.Dst = syscall.RawSockaddrInet4{Family: syscall.AF_INET, Addr: target.Addr().As4()}
+	rt.GenMask = syscall.RawSockaddrInet4{Family: syscall.AF_INET, Addr: [4]byte{mask[0], mask[1], mask[2], mask[3]}}
+	rt.Flags = syscall.RTF_UP
+	devName := [syscall.IFNAMSIZ]byte{}
+	copy(devName[:], dev)
+	rt.Dev = uintptr(unsafe.Pointer(&devName))
+	rtBytes := *(*[unsafe.Sizeof(rt)]byte)(unsafe.Pointer(&rt))
+
+	err = system.Ioctl(uintptr(fd), syscall.SIOCADDRT, uintptr(unsafe.Pointer(&rtBytes[0])))
+	if err != nil {
+		return err
+	}
+	return nil
+}

pkgs/system/system_linux.go

@@ -0,0 +1,14 @@
+package system
+
+import (
+	"os"
+	"syscall"
+)
+
+func Ioctl(fd uintptr, request uintptr, argp uintptr) error {
+	_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, request, argp)
+	if err != 0 {
+		return os.NewSyscallError("ioctl: ", err)
+	}
+	return nil
+}