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net: make {TCP,Unix}Listener implement syscall.Conn

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This change adds the syscall.Conn interface to Listener types, with the caveat that only RawConn.Control is supported. Custom socket options can now be set safely.

Updates #19435
Fixes #22065

Change-Id: I7e74780d00318dc54a923d1c628a18a36009acab
Reviewed-on: https://go-review.googlesource.com/71651
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Lorenz Bauer 2017-10-18 11:15:04 +01:00 • committed by Ian Lance Taylor
parent ff4ee88162
commit eed308de31
5 changed files with 143 additions and 0 deletions
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12
src/net/unixsock.go
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@ -219,6 +219,18 @@ type UnixListener struct {
func (ln *UnixListener) ok() bool { return ln != nil && ln.fd != nil }
// SyscallConn returns a raw network connection.
// This implements the syscall.Conn interface.
//
// The returned RawConn only supports calling Control. Read and
// Write return an error.
func (l *UnixListener) SyscallConn() (syscall.RawConn, error) {
if !l.ok() {
return nil, syscall.EINVAL
}
return newRawListener(l.fd)
}
// AcceptUnix accepts the next incoming call and returns the new
// connection.
func (l *UnixListener) AcceptUnix() (*UnixConn, error) {