caddy: Support SetReadBuffer and SyscallConn for QUIC (fix #3998)

Supersedes #3999

Matthew Holt committed Feb 16, 2021 at 13:55 UTC ec3ac840cf09ec43b9130b41a46c07827b2ff0b6

1 file changed +27

listeners.go

+27

@@ -22,6 +22,7 @@ import (

22 "strings"

23 "sync"

24 "sync/atomic"

25 + "syscall"

26 "time"

27 )

@@ -230,6 +231,24 @@ func (fcpc *fakeClosePacketConn) Close() error {

231 return nil

232 }

233

234 +// Supports QUIC implementation: https://github.com/caddyserver/caddy/issues/3998

235 +func (fcpc fakeClosePacketConn) SetReadBuffer(bytes int) error {

236 + if conn, ok := fcpc.PacketConn.(interface{ SetReadBuffer(int) error }); ok {

237 + return conn.SetReadBuffer(bytes)

238 + }

239 + return fmt.Errorf("SetReadBuffer() not implemented for %T", fcpc.PacketConn)

240 +}

241 +

242 +// Supports QUIC implementation: https://github.com/caddyserver/caddy/issues/3998

243 +func (fcpc fakeClosePacketConn) SyscallConn() (syscall.RawConn, error) {

244 + if conn, ok := fcpc.PacketConn.(interface {

245 + SyscallConn() (syscall.RawConn, error)

246 + }); ok {

247 + return conn.SyscallConn()

248 + }

249 + return nil, fmt.Errorf("SyscallConn() not implemented for %T", fcpc.PacketConn)

250 +}

251 +

252 // ErrFakeClosed is the underlying error value returned by

253 // fakeCloseListener.Accept() after Close() has been called,

254 // indicating that it is pretending to be closed so that the

@@ -432,3 +451,11 @@ var (

451 )

452

453 const maxPortSpan = 65535

454 +

455 +// Interface guards (see https://github.com/caddyserver/caddy/issues/3998)

456 +var (

457 + _ (interface{ SetReadBuffer(int) error }) = (*fakeClosePacketConn)(nil)

458 + _ (interface {

459 + SyscallConn() (syscall.RawConn, error)

460 + }) = (*fakeClosePacketConn)(nil)

461 +)