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fix parsing of interface index in packet info cmsg on big endian architectures (#5094)

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This commit is contained in:
Zxilly
2025-04-30 10:30:35 +08:00
committed by GitHub
parent 41cc01890d
commit e4bb2dbd55
3 changed files with 3 additions and 3 deletions
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2
sys_conn_helper_darwin.go
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@@ -30,7 +30,7 @@ func parseIPv4PktInfo(body []byte) (ip netip.Addr, ifIndex uint32, ok bool) {
if len(body) != 12 { if len(body) != 12 {
return netip.Addr{}, 0, false return netip.Addr{}, 0, false
} }
return netip.AddrFrom4(*(*[4]byte)(body[8:12])), binary.LittleEndian.Uint32(body), true return netip.AddrFrom4(*(*[4]byte)(body[8:12])), binary.NativeEndian.Uint32(body), true
} }
func isGSOEnabled(syscall.RawConn) bool { return false } func isGSOEnabled(syscall.RawConn) bool { return false }

2
sys_conn_helper_linux.go
View File

@@ -58,7 +58,7 @@ func parseIPv4PktInfo(body []byte) (ip netip.Addr, ifIndex uint32, ok bool) {
if len(body) != 12 { if len(body) != 12 {
return netip.Addr{}, 0, false return netip.Addr{}, 0, false
} }
return netip.AddrFrom4(*(*[4]byte)(body[8:12])), binary.LittleEndian.Uint32(body), true return netip.AddrFrom4(*(*[4]byte)(body[8:12])), binary.NativeEndian.Uint32(body), true
} }
// isGSOEnabled tests if the kernel supports GSO. // isGSOEnabled tests if the kernel supports GSO.

2
sys_conn_oob.go
View File

@@ -222,7 +222,7 @@ func (c *oobConn) ReadPacket() (receivedPacket, error) {
// }; // };
if len(body) == 20 { if len(body) == 20 {
p.info.addr = netip.AddrFrom16(*(*[16]byte)(body[:16])).Unmap() p.info.addr = netip.AddrFrom16(*(*[16]byte)(body[:16])).Unmap()
p.info.ifIndex = binary.LittleEndian.Uint32(body[16:]) p.info.ifIndex = binary.NativeEndian.Uint32(body[16:])
} else { } else {
invalidCmsgOnceV6.Do(func() { invalidCmsgOnceV6.Do(func() {
log.Printf("Received invalid IPv6 packet info control message: %+x. "+ log.Printf("Received invalid IPv6 packet info control message: %+x. "+