| // socket_linux.go -- Socket handling specific to Linux. |
| |
| // Copyright 2010 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package syscall |
| |
| const SizeofSockaddrInet4 = 16 |
| const SizeofSockaddrInet6 = 28 |
| const SizeofSockaddrUnix = 110 |
| |
| type RawSockaddrInet4 struct { |
| Family uint16; |
| Port uint16; |
| Addr [4]byte /* in_addr */; |
| Zero [8]uint8; |
| } |
| |
| func (sa *RawSockaddrInet4) setLen() Socklen_t { |
| return SizeofSockaddrInet4 |
| } |
| |
| type RawSockaddrInet6 struct { |
| Family uint16; |
| Port uint16; |
| Flowinfo uint32; |
| Addr [16]byte /* in6_addr */; |
| Scope_id uint32; |
| } |
| |
| func (sa *RawSockaddrInet6) setLen() Socklen_t { |
| return SizeofSockaddrInet6 |
| } |
| |
| type RawSockaddrUnix struct { |
| Family uint16; |
| Path [108]int8; |
| } |
| |
| func (sa *RawSockaddrUnix) setLen(int) { |
| } |
| |
| func (sa *RawSockaddrUnix) getLen() (int, int) { |
| if sa.Path[0] == 0 { |
| // "Abstract" Unix domain socket. |
| // Rewrite leading NUL as @ for textual display. |
| // (This is the standard convention.) |
| // Not friendly to overwrite in place, |
| // but the callers below don't care. |
| sa.Path[0] = '@'; |
| } |
| |
| // Assume path ends at NUL. |
| // This is not technically the Linux semantics for |
| // abstract Unix domain sockets--they are supposed |
| // to be uninterpreted fixed-size binary blobs--but |
| // everyone uses this convention. |
| n := 0; |
| for n < len(sa.Path) - 3 && sa.Path[n] != 0 { |
| n++; |
| } |
| |
| return n, 0 |
| } |
| |
| type RawSockaddr struct { |
| Family uint16; |
| Data [14]int8; |
| } |
| |
| // BindToDevice binds the socket associated with fd to device. |
| func BindToDevice(fd int, device string) (errno int) { |
| return SetsockoptString(fd, SOL_SOCKET, SO_BINDTODEVICE, device) |
| } |