From 3f1edad4e6ba0a7876750aea55507fae14d8badf Mon Sep 17 00:00:00 2001
From: Milan Lenco <milan.lenco@pantheon.tech>
Date: Wed, 11 Oct 2017 16:40:58 +0200
Subject: ODPM 266: Go-libmemif + 2 examples.

Change-Id: Icdb9b9eb2314eff6c96afe7996fcf2728291de4a
Signed-off-by: Milan Lenco <milan.lenco@pantheon.tech>
---
 vendor/github.com/google/gopacket/pfring/doc.go | 58 +++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 vendor/github.com/google/gopacket/pfring/doc.go

(limited to 'vendor/github.com/google/gopacket/pfring/doc.go')

diff --git a/vendor/github.com/google/gopacket/pfring/doc.go b/vendor/github.com/google/gopacket/pfring/doc.go
new file mode 100644
index 0000000..32baaf6
--- /dev/null
+++ b/vendor/github.com/google/gopacket/pfring/doc.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.
+
+/*Package pfring wraps the PF_RING C library for Go.
+
+PF_RING is a high-performance packet capture library written by ntop.org (see
+http://www.ntop.org/products/pf_ring/).  This library allows you to utilize the
+PF_RING library with gopacket to read packet data and decode it.
+
+This package is meant to be used with its parent,
+http://github.com/google/gopacket, although it can also be used independently
+if you just want to get packet data from the wire.
+
+Simple Example
+
+This is probably the simplest code you can use to start getting packets through
+pfring:
+
+ if ring, err := pfring.NewRing("eth0", 65536, pfring.FlagPromisc); err != nil {
+   panic(err)
+ } else if err := ring.SetBPFFilter("tcp and port 80"); err != nil {  // optional
+   panic(err)
+ } else if err := ring.Enable(); err != nil { // Must do this!, or you get no packets!
+   panic(err)
+ } else {
+   packetSource := gopacket.NewPacketSource(ring, layers.LinkTypeEthernet)
+	 for packet := range packetSource.Packets() {
+     handlePacket(packet)  // Do something with a packet here.
+   }
+ }
+
+Pfring Tweaks
+
+PF_RING has a ton of optimizations and tweaks to make sure you get just the
+packets you want.  For example, if you're only using pfring to read packets,
+consider running:
+
+ ring.SetSocketMode(pfring.ReadOnly)
+
+If you only care about packets received on your interface (not those transmitted
+by the interface), you can run:
+
+ ring.SetDirection(pfring.ReceiveOnly)
+
+Pfring Clusters
+
+PF_RING has an idea of 'clusters', where multiple applications can all read from
+the same cluster, and PF_RING will multiplex packets over that cluster such that
+only one application receives each packet.  We won't discuss this mechanism in
+too much more detail (see the ntop.org docs for more info), but here's how to
+utilize this with the pfring go library:
+
+ ring.SetCluster(1, pfring.ClusterPerFlow5Tuple)
+*/
+package pfring
-- 
cgit 1.2.3-korg