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This commit is contained in:
wwqgtxx 2025-08-25 10:18:22 +08:00
parent c089ffbd6c
commit 06ddb3e0a7
3 changed files with 11 additions and 7 deletions
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8
internal/gtcpip/header/ipv4.go
View file

@ -335,7 +335,7 @@ func (b IPv4) FragmentOffset() uint16 {
}
func (b IPv4) FragmentOffsetDarwinRaw() uint16 {
return binary.NativeEndian.Uint16(b[flagsFO:]) << 3
return common.NativeEndian.Uint16(b[flagsFO:]) << 3
}
// TotalLength returns the "total length" field of the IPv4 header.
@ -344,7 +344,7 @@ func (b IPv4) TotalLength() uint16 {
}
func (b IPv4) TotalLengthDarwinRaw() uint16 {
return binary.NativeEndian.Uint16(b[IPv4TotalLenOffset:]) + uint16(b.HeaderLength())
return common.NativeEndian.Uint16(b[IPv4TotalLenOffset:]) + uint16(b.HeaderLength())
}
// Checksum returns the checksum field of the IPv4 header.
@ -441,7 +441,7 @@ func (b IPv4) SetTotalLength(totalLength uint16) {
}
func (b IPv4) SetTotalLengthDarwinRaw(totalLength uint16) {
binary.NativeEndian.PutUint16(b[IPv4TotalLenOffset:], totalLength)
common.NativeEndian.PutUint16(b[IPv4TotalLenOffset:], totalLength)
}
// SetChecksum sets the checksum field of the IPv4 header.
@ -458,7 +458,7 @@ func (b IPv4) SetFlagsFragmentOffset(flags uint8, offset uint16) {
func (b IPv4) SetFlagsFragmentOffsetDarwinRaw(flags uint8, offset uint16) {
v := (uint16(flags) << 13) | (offset >> 3)
binary.NativeEndian.PutUint16(b[flagsFO:], v)
common.NativeEndian.PutUint16(b[flagsFO:], v)
}
// SetID sets the identification field.

7
ping/cmsg_windows.go
View file

@ -1,10 +1,11 @@
package ping
import (
"encoding/binary"
"fmt"
"unsafe"
"github.com/sagernet/sing/common"
"golang.org/x/net/ipv6"
"golang.org/x/sys/windows"
)
@ -36,9 +37,9 @@ func parseIPv6ControlMessage(cmsg []byte) (*ipv6.ControlMessage, error) {
}
switch cmsghdr.Type {
case IPV6_TCLASS:
controlMessage.TrafficClass = int(binary.NativeEndian.Uint32(cmsg[alignedSizeofCmsghdr : alignedSizeofCmsghdr+4]))
controlMessage.TrafficClass = int(common.NativeEndian.Uint32(cmsg[alignedSizeofCmsghdr : alignedSizeofCmsghdr+4]))
case IPV6_HOPLIMIT:
controlMessage.HopLimit = int(binary.NativeEndian.Uint32(cmsg[alignedSizeofCmsghdr : alignedSizeofCmsghdr+4]))
controlMessage.HopLimit = int(common.NativeEndian.Uint32(cmsg[alignedSizeofCmsghdr : alignedSizeofCmsghdr+4]))
}
cmsg = cmsg[msgSize:]
}

3
ping/ping.go
View file

@ -160,6 +160,9 @@ func (c *Conn) ReadIP(buffer *buf.Buffer) error {
if !c.destination.Is6() {
ipHdr := header.IPv4(buffer.Bytes())
if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
// MacOS have different TotalLen and FragOff in ipv4 header from socket api:
// https://stackoverflow.com/questions/13829712/mac-changes-ip-total-length-field/15881825#15881825
// but in the tun api still same data format as other system
ipHdr.SetTotalLength(ipHdr.TotalLengthDarwinRaw())
ipHdr.SetFlagsFragmentOffset(ipHdr.FlagsDarwinRaw(), ipHdr.FragmentOffsetDarwinRaw())
}