diff options
Diffstat (limited to 'pkg/abi/linux/socket.go')
| -rw-r--r-- | pkg/abi/linux/socket.go | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/pkg/abi/linux/socket.go b/pkg/abi/linux/socket.go index 6d22002c4..d5b731390 100644 --- a/pkg/abi/linux/socket.go +++ b/pkg/abi/linux/socket.go @@ -267,6 +267,20 @@ type SockAddrUnix struct { Path [UnixPathMax]int8 } +// SockAddr represents a union of valid socket address types. This is logically +// equivalent to struct sockaddr. SockAddr ensures that a well-defined set of +// types can be used as socket addresses. +type SockAddr interface { + // implementsSockAddr exists purely to allow a type to indicate that they + // implement this interface. This method is a no-op and shouldn't be called. + implementsSockAddr() +} + +func (s *SockAddrInet) implementsSockAddr() {} +func (s *SockAddrInet6) implementsSockAddr() {} +func (s *SockAddrUnix) implementsSockAddr() {} +func (s *SockAddrNetlink) implementsSockAddr() {} + // Linger is struct linger, from include/linux/socket.h. type Linger struct { OnOff int32 @@ -278,7 +292,10 @@ const SizeOfLinger = 8 // TCPInfo is a collection of TCP statistics. // -// From uapi/linux/tcp.h. +// From uapi/linux/tcp.h. Newer versions of Linux continue to add new fields to +// the end of this struct or within existing unusued space, so its size grows +// over time. The current iteration is based on linux v4.17. New versions are +// always backwards compatible. type TCPInfo struct { State uint8 CaState uint8 @@ -352,7 +369,7 @@ type TCPInfo struct { } // SizeOfTCPInfo is the binary size of a TCPInfo struct. -const SizeOfTCPInfo = 104 +var SizeOfTCPInfo = int(binary.Size(TCPInfo{})) // Control message types, from linux/socket.h. const ( |