ODPM 266: Go-libmemif + 2 examples.

Change-Id: Icdb9b9eb2314eff6c96afe7996fcf2728291de4a
Signed-off-by: Milan Lenco <milan.lenco@pantheon.tech>

1 files changed, 58 insertions, 0 deletions

diff --git a/vendor/github.com/google/gopacket/afpacket/sockopt_linux.go b/vendor/github.com/google/gopacket/afpacket/sockopt_linux.go
new file mode 100644
index 0000000..c53e1cc
--- /dev/null
+++ b/vendor/github.com/google/gopacket/afpacket/sockopt_linux.go
@@ -0,0 +1,58 @@
+// Copyright 2012 Google, Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree.
+
+// +build linux
+
+package afpacket
+
+import (
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// setsockopt provides access to the setsockopt syscall.
+func setsockopt(fd, level, name int, val unsafe.Pointer, vallen uintptr) error {
+	_, _, errno := unix.Syscall6(
+		unix.SYS_SETSOCKOPT,
+		uintptr(fd),
+		uintptr(level),
+		uintptr(name),
+		uintptr(val),
+		vallen,
+		0,
+	)
+	if errno != 0 {
+		return error(errno)
+	}
+
+	return nil
+}
+
+// getsockopt provides access to the getsockopt syscall.
+func getsockopt(fd, level, name int, val unsafe.Pointer, vallen uintptr) error {
+	_, _, errno := unix.Syscall6(
+		unix.SYS_GETSOCKOPT,
+		uintptr(fd),
+		uintptr(level),
+		uintptr(name),
+		uintptr(val),
+		vallen,
+		0,
+	)
+	if errno != 0 {
+		return error(errno)
+	}
+
+	return nil
+}
+
+// htons converts a short (uint16) from host-to-network byte order.
+// Thanks to mikioh for this neat trick:
+// https://github.com/mikioh/-stdyng/blob/master/afpacket.go
+func htons(i uint16) uint16 {
+	return (i<<8)&0xff00 | i>>8
+}