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tcp_keepalive.go
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tcp_keepalive.go
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// Copyright Project Contour Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package envoy
import "syscall"
// We only support Envoy on Linux so always configure Linux TCP keep-alive
// socket options regardless of the platform that Contour is running on.
// nolint:revive
const (
TCP_KEEPIDLE = 0x4 // Linux syscall.TCP_KEEPIDLE
TCP_KEEPINTVL = 0x5 // Linux syscall.TCP_KEEPINTVL
TCP_KEEPCNT = 0x6 // Linux syscall.TCP_KEEPCNT
// The following are Linux syscall constants for all
// architectures except MIPS.
SOL_SOCKET = 0x1
SO_KEEPALIVE = 0x9
// IPPROTO_TCP has the same value across Go platforms, but
// is defined here for consistency.
IPPROTO_TCP = syscall.IPPROTO_TCP
)