summaryrefslogtreecommitdiffhomepage
path: root/pkg/tcpip/transport/tcp
diff options
context:
space:
mode:
authorgVisor bot <gvisor-bot@google.com>2020-03-05 23:58:56 +0000
committergVisor bot <gvisor-bot@google.com>2020-03-05 23:58:56 +0000
commitf82f7b6f019af248daa9b03749169261c060c496 (patch)
tree1bb926201b49a3629297664d91127baa5fcfb694 /pkg/tcpip/transport/tcp
parent2fb6f7de16d3d519b29f8deae695964b896e0f97 (diff)
parent9b3aad33c4470908953b7b548b12cba77799f342 (diff)
Merge release-20200219.0-107-g9b3aad3 (automated)
Diffstat (limited to 'pkg/tcpip/transport/tcp')
-rw-r--r--pkg/tcpip/transport/tcp/connect.go6
-rwxr-xr-xpkg/tcpip/transport/tcp/connect_unsafe.go30
2 files changed, 33 insertions, 3 deletions
diff --git a/pkg/tcpip/transport/tcp/connect.go b/pkg/tcpip/transport/tcp/connect.go
index ae4f3f3a9..c0f73ef16 100644
--- a/pkg/tcpip/transport/tcp/connect.go
+++ b/pkg/tcpip/transport/tcp/connect.go
@@ -624,17 +624,17 @@ func parseSynSegmentOptions(s *segment) header.TCPSynOptions {
var optionPool = sync.Pool{
New: func() interface{} {
- return make([]byte, maxOptionSize)
+ return &[maxOptionSize]byte{}
},
}
func getOptions() []byte {
- return optionPool.Get().([]byte)
+ return (*optionPool.Get().(*[maxOptionSize]byte))[:]
}
func putOptions(options []byte) {
// Reslice to full capacity.
- optionPool.Put(options[0:cap(options)])
+ optionPool.Put(optionsToArray(options))
}
func makeSynOptions(opts header.TCPSynOptions) []byte {
diff --git a/pkg/tcpip/transport/tcp/connect_unsafe.go b/pkg/tcpip/transport/tcp/connect_unsafe.go
new file mode 100755
index 000000000..cfc304616
--- /dev/null
+++ b/pkg/tcpip/transport/tcp/connect_unsafe.go
@@ -0,0 +1,30 @@
+// Copyright 2018 The gVisor 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 tcp
+
+import (
+ "reflect"
+ "unsafe"
+)
+
+// optionsToArray converts a slice of capacity >-= maxOptionSize to an array.
+//
+// optionsToArray panics if the capacity of options is smaller than
+// maxOptionSize.
+func optionsToArray(options []byte) *[maxOptionSize]byte {
+ // Reslice to full capacity.
+ options = options[0:maxOptionSize]
+ return (*[maxOptionSize]byte)(unsafe.Pointer((*reflect.SliceHeader)(unsafe.Pointer(&options)).Data))
+}