mirrors/uquic
1
0
Fork 0
mirror of https://github.com/refraction-networking/uquic.git synced 2025-04-03 04:07:35 +03:00
Code Issues Projects Releases Packages Wiki Activity

detect kernel GSO support

Browse source
This commit is contained in:
Marten Seemann 2023-07-30 16:31:30 -04:00
parent 4122eb7a7d
commit 3a3169551b
7 changed files with 30 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

12
sys_conn_helper_linux.go
View file

@ -52,6 +52,18 @@ func parseIPv4PktInfo(body []byte) (ip netip.Addr, ifIndex uint32, ok bool) {
return netip.AddrFrom4(*(*[4]byte)(body[8:12])), binary.LittleEndian.Uint32(body), true
}
// isGSOSupported tests if the kernel supports GSO.
// Sending with GSO might still fail later on, if the interface doesn't support it (see isGSOError).
func isGSOSupported(conn syscall.RawConn) bool {
var serr error
if err := conn.Control(func(fd uintptr) {
_, serr = unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_SEGMENT)
}); err != nil {
return false
}
return serr == nil
}
func appendUDPSegmentSizeMsg(b []byte, size uint16) []byte {
startLen := len(b)
const dataLen = 2 // payload is a uint16