TheArchive/tailscale
1
0
Fork 0
mirror of https://github.com/tailscale/tailscale.git synced 2025-02-21 12:28:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

wgengine/magicsock: use x/sys/unix constants for UDP GSO (#9597)

Browse Source 
Updates #cleanup

Signed-off-by: Jordan Whited <jordan@tailscale.com>
This commit is contained in:
Jordan Whited 2023-09-29 14:59:46 -07:00 committed by GitHub
parent a74970305b
commit 16fa3c24ea
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 5 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
wgengine/magicsock/magicsock_linux.go
View File

@ -318,13 +318,6 @@ func trySetSocketBuffer(pconn nettype.PacketConn, logf logger.Logf) {
}
}
const (
// TODO(jwhited): upstream to unix?
socketOptionLevelUDP = 17
socketOptionUDPSegment = 103
socketOptionUDPGRO = 104
)
// tryEnableUDPOffload attempts to enable the UDP_GRO socket option on pconn,
// and returns two booleans indicating TX and RX UDP offload support.
func tryEnableUDPOffload(pconn nettype.PacketConn) (hasTX bool, hasRX bool) {
@ -334,13 +327,13 @@ func tryEnableUDPOffload(pconn nettype.PacketConn) (hasTX bool, hasRX bool) {
return
}
err = rc.Control(func(fd uintptr) {
_, errSyscall := syscall.GetsockoptInt(int(fd), unix.IPPROTO_UDP, socketOptionUDPSegment)
_, errSyscall := syscall.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_SEGMENT)
if errSyscall != nil {
// no point in checking RX, TX support was added first.
return
}
hasTX = true
errSyscall = syscall.SetsockoptInt(int(fd), unix.IPPROTO_UDP, socketOptionUDPGRO, 1)
errSyscall = syscall.SetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO, 1)
hasRX = errSyscall == nil
})
if err != nil {
@ -367,7 +360,7 @@ func getGSOSizeFromControl(control []byte) (int, error) {
if err != nil {
return 0, fmt.Errorf("error parsing socket control message: %w", err)
}
if hdr.Level == socketOptionLevelUDP && hdr.Type == socketOptionUDPGRO && len(data) >= 2 {
if hdr.Level == unix.SOL_UDP && hdr.Type == unix.UDP_GRO && len(data) >= 2 {
var gso uint16
// TODO(jwhited): replace with encoding/binary.NativeEndian when it's available
copy(unsafe.Slice((*byte)(unsafe.Pointer(&gso)), 2), data[:2])
@ -389,8 +382,8 @@ func setGSOSizeInControl(control *[]byte, gsoSize uint16) {
}
*control = (*control)[:cap(*control)]
hdr := (*unix.Cmsghdr)(unsafe.Pointer(&(*control)[0]))
hdr.Level = socketOptionLevelUDP
hdr.Type = socketOptionUDPSegment
hdr.Level = unix.SOL_UDP
hdr.Type = unix.UDP_SEGMENT
hdr.SetLen(unix.CmsgLen(2))
// TODO(jwhited): replace with encoding/binary.NativeEndian when it's available
copy((*control)[unix.SizeofCmsghdr:], unsafe.Slice((*byte)(unsafe.Pointer(&gsoSize)), 2))