1 files changed, 0 insertions, 343 deletions
diff --git a/vendor/github.com/google/gopacket/pfring/pfring.go b/vendor/github.com/google/gopacket/pfring/pfring.go
deleted file mode 100644
index 1d2fa68..0000000
--- a/vendor/github.com/google/gopacket/pfring/pfring.go
+++ /dev/null
@@ -1,343 +0,0 @@
-// Copyright 2012 Google, Inc. All rights reserved.
-// Copyright 2009-2011 Andreas Krennmair. 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
-
-/*
-#cgo LDFLAGS: -lpfring -lpcap
-#include <stdlib.h>
-#include <pfring.h>
-#include <linux/pf_ring.h>
-
-int pfring_readpacketdatato_wrapper(
-    pfring* ring,
-    u_char* buffer,
-    u_int buffer_len,
-    struct pfring_pkthdr* hdr) {
-  // We can't pass a Go pointer to a Go pointer which means we can't pass
-  // buffer as a uchar**, like pfring_recv wants, for ReadPacketDataTo.  So,
-  // this wrapper does the pointer conversion in C code.  Since this isn't
-  // zero-copy, it turns out that the pointer-to-pointer part of things isn't
-  // actually used anyway.
-  return pfring_recv(ring, &buffer, buffer_len, hdr, 1);
-}
-*/
-import "C"
-
-// NOTE:  If you install PF_RING with non-standard options, you may also need
-// to use LDFLAGS -lnuma and/or -lrt.  Both have been reported necessary if
-// PF_RING is configured with --disable-bpf.
-
-import (
-	"fmt"
-	"net"
-	"os"
-	"strconv"
-	"sync"
-	"time"
-	"unsafe"
-
-	"github.com/google/gopacket"
-)
-
-const errorBufferSize = 256
-
-// Ring provides a handle to a pf_ring.
-type Ring struct {
-	// cptr is the handle for the actual pcap C object.
-	cptr                    *C.pfring
-	snaplen                 int
-	useExtendedPacketHeader bool
-	interfaceIndex          int
-	mu                      sync.Mutex
-	// Since pointers to these objects are passed into a C function, if
-	// they're declared locally then the Go compiler thinks they may have
-	// escaped into C-land, so it allocates them on the heap.  This causes a
-	// huge memory hit, so to handle that we store them here instead.
-	pkthdr C.struct_pfring_pkthdr
-	bufPtr *C.u_char
-}
-
-// Flag provides a set of boolean flags to use when creating a new ring.
-type Flag uint32
-
-// Set of flags that can be passed (OR'd together) to NewRing.
-const (
-	FlagReentrant       Flag = C.PF_RING_REENTRANT
-	FlagLongHeader      Flag = C.PF_RING_LONG_HEADER
-	FlagPromisc         Flag = C.PF_RING_PROMISC
-	FlagDNASymmetricRSS Flag = C.PF_RING_DNA_SYMMETRIC_RSS
-	FlagTimestamp       Flag = C.PF_RING_TIMESTAMP
-	FlagHWTimestamp     Flag = C.PF_RING_HW_TIMESTAMP
-)
-
-// NewRing creates a new PFRing.  Note that when the ring is initially created,
-// it is disabled.  The caller must call Enable to start receiving packets.
-// The caller should call Close on the given ring when finished with it.
-func NewRing(device string, snaplen uint32, flags Flag) (ring *Ring, _ error) {
-	dev := C.CString(device)
-	defer C.free(unsafe.Pointer(dev))
-
-	cptr, err := C.pfring_open(dev, C.u_int32_t(snaplen), C.u_int32_t(flags))
-	if cptr == nil || err != nil {
-		return nil, fmt.Errorf("pfring NewRing error: %v", err)
-	}
-	ring = &Ring{cptr: cptr, snaplen: int(snaplen)}
-
-	if flags&FlagLongHeader == FlagLongHeader {
-		ring.useExtendedPacketHeader = true
-	} else {
-		ifc, err := net.InterfaceByName(device)
-		if err == nil {
-			ring.interfaceIndex = ifc.Index
-		}
-	}
-	ring.SetApplicationName(os.Args[0])
-	return
-}
-
-// Close closes the given Ring.  After this call, the Ring should no longer be
-// used.
-func (r *Ring) Close() {
-	C.pfring_close(r.cptr)
-}
-
-// NextResult is the return code from a call to Next.
-type NextResult int32
-
-// Set of results that could be returned from a call to get another packet.
-const (
-	NextNoPacketNonblocking NextResult = 0
-	NextError               NextResult = -1
-	NextOk                  NextResult = 1
-	NextNotEnabled          NextResult = -7
-)
-
-// NextResult implements the error interface.
-func (n NextResult) Error() string {
-	switch n {
-	case NextNoPacketNonblocking:
-		return "No packet available, nonblocking socket"
-	case NextError:
-		return "Generic error"
-	case NextOk:
-		return "Success (not an error)"
-	case NextNotEnabled:
-		return "Ring not enabled"
-	}
-	return strconv.Itoa(int(n))
-}
-
-// ReadPacketDataTo reads packet data into a user-supplied buffer.
-// This function ignores snaplen and instead reads up to the length of the
-// passed-in slice.
-// The number of bytes read into data will be returned in ci.CaptureLength.
-func (r *Ring) ReadPacketDataTo(data []byte) (ci gopacket.CaptureInfo, err error) {
-	// This tricky bufPtr points to the start of our slice data, so pfring_recv
-	// will actually write directly into our Go slice.  Nice!
-	r.mu.Lock()
-	r.bufPtr = (*C.u_char)(unsafe.Pointer(&data[0]))
-	result := NextResult(C.pfring_readpacketdatato_wrapper(r.cptr, r.bufPtr, C.u_int(len(data)), &r.pkthdr))
-	if result != NextOk {
-		err = result
-		r.mu.Unlock()
-		return
-	}
-	ci.Timestamp = time.Unix(int64(r.pkthdr.ts.tv_sec),
-		int64(r.pkthdr.ts.tv_usec)*1000) // convert micros to nanos
-	ci.CaptureLength = int(r.pkthdr.caplen)
-	ci.Length = int(r.pkthdr.len)
-	if r.useExtendedPacketHeader {
-		ci.InterfaceIndex = int(r.pkthdr.extended_hdr.if_index)
-	} else {
-		ci.InterfaceIndex = r.interfaceIndex
-	}
-	r.mu.Unlock()
-	return
-}
-
-// ReadPacketData returns the next packet read from the pcap handle, along with an error
-// code associated with that packet.  If the packet is read successfully, the
-// returned error is nil.
-func (r *Ring) ReadPacketData() (data []byte, ci gopacket.CaptureInfo, err error) {
-	data = make([]byte, r.snaplen)
-	ci, err = r.ReadPacketDataTo(data)
-	if err != nil {
-		data = nil
-		return
-	}
-	data = data[:ci.CaptureLength]
-	return
-}
-
-// ClusterType is a type of clustering used when balancing across multiple
-// rings.
-type ClusterType C.cluster_type
-
-const (
-	// ClusterPerFlow clusters by <src ip, src port, dst ip, dst port, proto,
-	// vlan>
-	ClusterPerFlow ClusterType = C.cluster_per_flow
-	// ClusterRoundRobin round-robins packets between applications, ignoring
-	// packet information.
-	ClusterRoundRobin ClusterType = C.cluster_round_robin
-	// ClusterPerFlow2Tuple clusters by <src ip, dst ip>
-	ClusterPerFlow2Tuple ClusterType = C.cluster_per_flow_2_tuple
-	// ClusterPerFlow4Tuple clusters by <src ip, src port, dst ip, dst port>
-	ClusterPerFlow4Tuple ClusterType = C.cluster_per_flow_4_tuple
-	// ClusterPerFlow5Tuple clusters by <src ip, src port, dst ip, dst port,
-	// proto>
-	ClusterPerFlow5Tuple ClusterType = C.cluster_per_flow_5_tuple
-	// ClusterPerFlowTCP5Tuple acts like ClusterPerFlow5Tuple for TCP packets and
-	// like ClusterPerFlow2Tuple for all other packets.
-	ClusterPerFlowTCP5Tuple ClusterType = C.cluster_per_flow_tcp_5_tuple
-)
-
-// SetCluster sets which cluster the ring should be part of, and the cluster
-// type to use.
-func (r *Ring) SetCluster(cluster int, typ ClusterType) error {
-	if rv := C.pfring_set_cluster(r.cptr, C.u_int(cluster), C.cluster_type(typ)); rv != 0 {
-		return fmt.Errorf("Unable to set cluster, got error code %d", rv)
-	}
-	return nil
-}
-
-// RemoveFromCluster removes the ring from the cluster it was put in with
-// SetCluster.
-func (r *Ring) RemoveFromCluster() error {
-	if rv := C.pfring_remove_from_cluster(r.cptr); rv != 0 {
-		return fmt.Errorf("Unable to remove from cluster, got error code %d", rv)
-	}
-	return nil
-}
-
-// SetSamplingRate sets the sampling rate to 1/<rate>.
-func (r *Ring) SetSamplingRate(rate int) error {
-	if rv := C.pfring_set_sampling_rate(r.cptr, C.u_int32_t(rate)); rv != 0 {
-		return fmt.Errorf("Unable to set sampling rate, got error code %d", rv)
-	}
-	return nil
-}
-
-// SetBPFFilter sets the BPF filter for the ring.
-func (r *Ring) SetBPFFilter(bpfFilter string) error {
-	filter := C.CString(bpfFilter)
-	defer C.free(unsafe.Pointer(filter))
-	if rv := C.pfring_set_bpf_filter(r.cptr, filter); rv != 0 {
-		return fmt.Errorf("Unable to set BPF filter, got error code %d", rv)
-	}
-	return nil
-}
-
-// RemoveBPFFilter removes the BPF filter from the ring.
-func (r *Ring) RemoveBPFFilter() error {
-	if rv := C.pfring_remove_bpf_filter(r.cptr); rv != 0 {
-		return fmt.Errorf("Unable to remove BPF filter, got error code %d", rv)
-	}
-	return nil
-}
-
-// WritePacketData uses the ring to send raw packet data to the interface.
-func (r *Ring) WritePacketData(data []byte) error {
-	buf := (*C.char)(unsafe.Pointer(&data[0]))
-	if rv := C.pfring_send(r.cptr, buf, C.u_int(len(data)), 1); rv < 0 {
-		return fmt.Errorf("Unable to send packet data, got error code %d", rv)
-	}
-	return nil
-}
-
-// Enable enables the given ring.  This function MUST be called on each new
-// ring after it has been set up, or that ring will NOT receive packets.
-func (r *Ring) Enable() error {
-	if rv := C.pfring_enable_ring(r.cptr); rv != 0 {
-		return fmt.Errorf("Unable to enable ring, got error code %d", rv)
-	}
-	return nil
-}
-
-// Disable disables the given ring.  After this call, it will no longer receive
-// packets.
-func (r *Ring) Disable() error {
-	if rv := C.pfring_disable_ring(r.cptr); rv != 0 {
-		return fmt.Errorf("Unable to disable ring, got error code %d", rv)
-	}
-	return nil
-}
-
-// Stats provides simple statistics on a ring.
-type Stats struct {
-	Received, Dropped uint64
-}
-
-// Stats returns statistsics for the ring.
-func (r *Ring) Stats() (s Stats, err error) {
-	var stats C.pfring_stat
-	if rv := C.pfring_stats(r.cptr, &stats); rv != 0 {
-		err = fmt.Errorf("Unable to get ring stats, got error code %d", rv)
-		return
-	}
-	s.Received = uint64(stats.recv)
-	s.Dropped = uint64(stats.drop)
-	return
-}
-
-// Direction is a simple enum to set which packets (TX, RX, or both) a ring
-// captures.
-type Direction C.packet_direction
-
-const (
-	// TransmitOnly will only capture packets transmitted by the ring's
-	// interface(s).
-	TransmitOnly Direction = C.tx_only_direction
-	// ReceiveOnly will only capture packets received by the ring's
-	// interface(s).
-	ReceiveOnly Direction = C.rx_only_direction
-	// ReceiveAndTransmit will capture both received and transmitted packets on
-	// the ring's interface(s).
-	ReceiveAndTransmit Direction = C.rx_and_tx_direction
-)
-
-// SetDirection sets which packets should be captured by the ring.
-func (r *Ring) SetDirection(d Direction) error {
-	if rv := C.pfring_set_direction(r.cptr, C.packet_direction(d)); rv != 0 {
-		return fmt.Errorf("Unable to set ring direction, got error code %d", rv)
-	}
-	return nil
-}
-
-// SocketMode is an enum for setting whether a ring should read, write, or both.
-type SocketMode C.socket_mode
-
-const (
-	// WriteOnly sets up the ring to only send packets (Inject), not read them.
-	WriteOnly SocketMode = C.send_only_mode
-	// ReadOnly sets up the ring to only receive packets (ReadPacketData), not
-	// send them.
-	ReadOnly SocketMode = C.recv_only_mode
-	// WriteAndRead sets up the ring to both send and receive packets.
-	WriteAndRead SocketMode = C.send_and_recv_mode
-)
-
-// SetSocketMode sets the mode of the ring socket to send, receive, or both.
-func (r *Ring) SetSocketMode(s SocketMode) error {
-	if rv := C.pfring_set_socket_mode(r.cptr, C.socket_mode(s)); rv != 0 {
-		return fmt.Errorf("Unable to set socket mode, got error code %d", rv)
-	}
-	return nil
-}
-
-// SetApplicationName sets a string name to the ring.  This name is available in
-// /proc stats for pf_ring.  By default, NewRing automatically calls this with
-// argv[0].
-func (r *Ring) SetApplicationName(name string) error {
-	buf := C.CString(name)
-	defer C.free(unsafe.Pointer(buf))
-	if rv := C.pfring_set_application_name(r.cptr, buf); rv != 0 {
-		return fmt.Errorf("Unable to set ring application name, got error code %d", rv)
-	}
-	return nil
-}