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*: remove 'tools/etcd-top' to drop pcap.h

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This commit is contained in:
Gyu-Ho Lee 2016-12-07 10:17:28 -08:00
parent 41e329cd35
commit a9e2d3d4d3
10 changed files with 0 additions and 1314 deletions
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4
cmd/Godeps/Godeps.json generated
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@ -11,10 +11,6 @@
"Comment": "null-5",
"Rev": "'75cd24fc2f2c2a2088577d12123ddee5f54e0675'"
},
{
"ImportPath": "github.com/akrennmair/gopcap",
"Rev": "00e11033259acb75598ba416495bb708d864a010"
},
{
"ImportPath": "github.com/beorn7/perks/quantile",
"Rev": "b965b613227fddccbfffe13eae360ed3fa822f8d"

5
cmd/vendor/github.com/akrennmair/gopcap/.gitignore generated vendored
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@ -1,5 +0,0 @@
#*
*~
/tools/pass/pass
/tools/pcaptest/pcaptest
/tools/tcpdump/tcpdump

27
cmd/vendor/github.com/akrennmair/gopcap/LICENSE generated vendored
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@ -1,27 +0,0 @@
Copyright (c) 2009-2011 Andreas Krennmair. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Andreas Krennmair nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

11
cmd/vendor/github.com/akrennmair/gopcap/README.mkd generated vendored
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@ -1,11 +0,0 @@
# PCAP
This is a simple wrapper around libpcap for Go. Originally written by Andreas
Krennmair <ak@synflood.at> and only minorly touched up by Mark Smith <mark@qq.is>.
Please see the included pcaptest.go and tcpdump.go programs for instructions on
how to use this library.
Miek Gieben <miek@miek.nl> has created a more Go-like package and replaced functionality
with standard functions from the standard library. The package has also been renamed to
pcap.

527
cmd/vendor/github.com/akrennmair/gopcap/decode.go generated vendored
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@ -1,527 +0,0 @@
package pcap
import (
"encoding/binary"
"fmt"
"net"
"reflect"
"strings"
)
const (
TYPE_IP = 0x0800
TYPE_ARP = 0x0806
TYPE_IP6 = 0x86DD
TYPE_VLAN = 0x8100
IP_ICMP = 1
IP_INIP = 4
IP_TCP = 6
IP_UDP = 17
)
const (
ERRBUF_SIZE = 256
// According to pcap-linktype(7).
LINKTYPE_NULL = 0
LINKTYPE_ETHERNET = 1
LINKTYPE_TOKEN_RING = 6
LINKTYPE_ARCNET = 7
LINKTYPE_SLIP = 8
LINKTYPE_PPP = 9
LINKTYPE_FDDI = 10
LINKTYPE_ATM_RFC1483 = 100
LINKTYPE_RAW = 101
LINKTYPE_PPP_HDLC = 50
LINKTYPE_PPP_ETHER = 51
LINKTYPE_C_HDLC = 104
LINKTYPE_IEEE802_11 = 105
LINKTYPE_FRELAY = 107
LINKTYPE_LOOP = 108
LINKTYPE_LINUX_SLL = 113
LINKTYPE_LTALK = 104
LINKTYPE_PFLOG = 117
LINKTYPE_PRISM_HEADER = 119
LINKTYPE_IP_OVER_FC = 122
LINKTYPE_SUNATM = 123
LINKTYPE_IEEE802_11_RADIO = 127
LINKTYPE_ARCNET_LINUX = 129
LINKTYPE_LINUX_IRDA = 144
LINKTYPE_LINUX_LAPD = 177
)
type addrHdr interface {
SrcAddr() string
DestAddr() string
Len() int
}
type addrStringer interface {
String(addr addrHdr) string
}
func decodemac(pkt []byte) uint64 {
mac := uint64(0)
for i := uint(0); i < 6; i++ {
mac = (mac << 8) + uint64(pkt[i])
}
return mac
}
// Decode decodes the headers of a Packet.
func (p *Packet) Decode() {
if len(p.Data) <= 14 {
return
}
p.Type = int(binary.BigEndian.Uint16(p.Data[12:14]))
p.DestMac = decodemac(p.Data[0:6])
p.SrcMac = decodemac(p.Data[6:12])
if len(p.Data) >= 15 {
p.Payload = p.Data[14:]
}
switch p.Type {
case TYPE_IP:
p.decodeIp()
case TYPE_IP6:
p.decodeIp6()
case TYPE_ARP:
p.decodeArp()
case TYPE_VLAN:
p.decodeVlan()
}
}
func (p *Packet) headerString(headers []interface{}) string {
// If there's just one header, return that.
if len(headers) == 1 {
if hdr, ok := headers[0].(fmt.Stringer); ok {
return hdr.String()
}
}
// If there are two headers (IPv4/IPv6 -> TCP/UDP/IP..)
if len(headers) == 2 {
// Commonly the first header is an address.
if addr, ok := p.Headers[0].(addrHdr); ok {
if hdr, ok := p.Headers[1].(addrStringer); ok {
return fmt.Sprintf("%s %s", p.Time, hdr.String(addr))
}
}
}
// For IP in IP, we do a recursive call.
if len(headers) >= 2 {
if addr, ok := headers[0].(addrHdr); ok {
if _, ok := headers[1].(addrHdr); ok {
return fmt.Sprintf("%s > %s IP in IP: ",
addr.SrcAddr(), addr.DestAddr(), p.headerString(headers[1:]))
}
}
}
var typeNames []string
for _, hdr := range headers {
typeNames = append(typeNames, reflect.TypeOf(hdr).String())
}
return fmt.Sprintf("unknown [%s]", strings.Join(typeNames, ","))
}
// String prints a one-line representation of the packet header.
// The output is suitable for use in a tcpdump program.
func (p *Packet) String() string {
// If there are no headers, print "unsupported protocol".
if len(p.Headers) == 0 {
return fmt.Sprintf("%s unsupported protocol %d", p.Time, int(p.Type))
}
return fmt.Sprintf("%s %s", p.Time, p.headerString(p.Headers))
}
// Arphdr is a ARP packet header.
type Arphdr struct {
Addrtype uint16
Protocol uint16
HwAddressSize uint8
ProtAddressSize uint8
Operation uint16
SourceHwAddress []byte
SourceProtAddress []byte
DestHwAddress []byte
DestProtAddress []byte
}
func (arp *Arphdr) String() (s string) {
switch arp.Operation {
case 1:
s = "ARP request"
case 2:
s = "ARP Reply"
}
if arp.Addrtype == LINKTYPE_ETHERNET && arp.Protocol == TYPE_IP {
s = fmt.Sprintf("%012x (%s) > %012x (%s)",
decodemac(arp.SourceHwAddress), arp.SourceProtAddress,
decodemac(arp.DestHwAddress), arp.DestProtAddress)
} else {
s = fmt.Sprintf("addrtype = %d protocol = %d", arp.Addrtype, arp.Protocol)
}
return
}
func (p *Packet) decodeArp() {
if len(p.Payload) < 8 {
return
}
pkt := p.Payload
arp := new(Arphdr)
arp.Addrtype = binary.BigEndian.Uint16(pkt[0:2])
arp.Protocol = binary.BigEndian.Uint16(pkt[2:4])
arp.HwAddressSize = pkt[4]
arp.ProtAddressSize = pkt[5]
arp.Operation = binary.BigEndian.Uint16(pkt[6:8])
if len(pkt) < int(8+2*arp.HwAddressSize+2*arp.ProtAddressSize) {
return
}
arp.SourceHwAddress = pkt[8 : 8+arp.HwAddressSize]
arp.SourceProtAddress = pkt[8+arp.HwAddressSize : 8+arp.HwAddressSize+arp.ProtAddressSize]
arp.DestHwAddress = pkt[8+arp.HwAddressSize+arp.ProtAddressSize : 8+2*arp.HwAddressSize+arp.ProtAddressSize]
arp.DestProtAddress = pkt[8+2*arp.HwAddressSize+arp.ProtAddressSize : 8+2*arp.HwAddressSize+2*arp.ProtAddressSize]
p.Headers = append(p.Headers, arp)
if len(pkt) >= int(8+2*arp.HwAddressSize+2*arp.ProtAddressSize) {
p.Payload = p.Payload[8+2*arp.HwAddressSize+2*arp.ProtAddressSize:]
}
}
// IPadr is the header of an IP packet.
type Iphdr struct {
Version uint8
Ihl uint8
Tos uint8
Length uint16
Id uint16
Flags uint8
FragOffset uint16
Ttl uint8
Protocol uint8
Checksum uint16
SrcIp []byte
DestIp []byte
}
func (p *Packet) decodeIp() {
if len(p.Payload) < 20 {
return
}
pkt := p.Payload
ip := new(Iphdr)
ip.Version = uint8(pkt[0]) >> 4
ip.Ihl = uint8(pkt[0]) & 0x0F
ip.Tos = pkt[1]
ip.Length = binary.BigEndian.Uint16(pkt[2:4])
ip.Id = binary.BigEndian.Uint16(pkt[4:6])
flagsfrags := binary.BigEndian.Uint16(pkt[6:8])
ip.Flags = uint8(flagsfrags >> 13)
ip.FragOffset = flagsfrags & 0x1FFF
ip.Ttl = pkt[8]
ip.Protocol = pkt[9]
ip.Checksum = binary.BigEndian.Uint16(pkt[10:12])
ip.SrcIp = pkt[12:16]
ip.DestIp = pkt[16:20]
pEnd := int(ip.Length)
if pEnd > len(pkt) {
pEnd = len(pkt)
}
if len(pkt) >= pEnd && int(ip.Ihl*4) < pEnd {
p.Payload = pkt[ip.Ihl*4 : pEnd]
} else {
p.Payload = []byte{}
}
p.Headers = append(p.Headers, ip)
p.IP = ip
switch ip.Protocol {
case IP_TCP:
p.decodeTcp()
case IP_UDP:
p.decodeUdp()
case IP_ICMP:
p.decodeIcmp()
case IP_INIP:
p.decodeIp()
}
}
func (ip *Iphdr) SrcAddr() string { return net.IP(ip.SrcIp).String() }
func (ip *Iphdr) DestAddr() string { return net.IP(ip.DestIp).String() }
func (ip *Iphdr) Len() int { return int(ip.Length) }
type Vlanhdr struct {
Priority byte
DropEligible bool
VlanIdentifier int
Type int // Not actually part of the vlan header, but the type of the actual packet
}
func (v *Vlanhdr) String() {
fmt.Sprintf("VLAN Priority:%d Drop:%v Tag:%d", v.Priority, v.DropEligible, v.VlanIdentifier)
}
func (p *Packet) decodeVlan() {
pkt := p.Payload
vlan := new(Vlanhdr)
if len(pkt) < 4 {
return
}
vlan.Priority = (pkt[2] & 0xE0) >> 13
vlan.DropEligible = pkt[2]&0x10 != 0
vlan.VlanIdentifier = int(binary.BigEndian.Uint16(pkt[:2])) & 0x0FFF
vlan.Type = int(binary.BigEndian.Uint16(p.Payload[2:4]))
p.Headers = append(p.Headers, vlan)
if len(pkt) >= 5 {
p.Payload = p.Payload[4:]
}
switch vlan.Type {
case TYPE_IP:
p.decodeIp()
case TYPE_IP6:
p.decodeIp6()
case TYPE_ARP:
p.decodeArp()
}
}
type Tcphdr struct {
SrcPort uint16
DestPort uint16
Seq uint32
Ack uint32
DataOffset uint8
Flags uint16
Window uint16
Checksum uint16
Urgent uint16
Data []byte
}
const (
TCP_FIN = 1 << iota
TCP_SYN
TCP_RST
TCP_PSH
TCP_ACK
TCP_URG
TCP_ECE
TCP_CWR
TCP_NS
)
func (p *Packet) decodeTcp() {
if len(p.Payload) < 20 {
return
}
pkt := p.Payload
tcp := new(Tcphdr)
tcp.SrcPort = binary.BigEndian.Uint16(pkt[0:2])
tcp.DestPort = binary.BigEndian.Uint16(pkt[2:4])
tcp.Seq = binary.BigEndian.Uint32(pkt[4:8])
tcp.Ack = binary.BigEndian.Uint32(pkt[8:12])
tcp.DataOffset = (pkt[12] & 0xF0) >> 4
tcp.Flags = binary.BigEndian.Uint16(pkt[12:14]) & 0x1FF
tcp.Window = binary.BigEndian.Uint16(pkt[14:16])
tcp.Checksum = binary.BigEndian.Uint16(pkt[16:18])
tcp.Urgent = binary.BigEndian.Uint16(pkt[18:20])
if len(pkt) >= int(tcp.DataOffset*4) {
p.Payload = pkt[tcp.DataOffset*4:]
}
p.Headers = append(p.Headers, tcp)
p.TCP = tcp
}
func (tcp *Tcphdr) String(hdr addrHdr) string {
return fmt.Sprintf("TCP %s:%d > %s:%d %s SEQ=%d ACK=%d LEN=%d",
hdr.SrcAddr(), int(tcp.SrcPort), hdr.DestAddr(), int(tcp.DestPort),
tcp.FlagsString(), int64(tcp.Seq), int64(tcp.Ack), hdr.Len())
}
func (tcp *Tcphdr) FlagsString() string {
var sflags []string
if 0 != (tcp.Flags & TCP_SYN) {
sflags = append(sflags, "syn")
}
if 0 != (tcp.Flags & TCP_FIN) {
sflags = append(sflags, "fin")
}
if 0 != (tcp.Flags & TCP_ACK) {
sflags = append(sflags, "ack")
}
if 0 != (tcp.Flags & TCP_PSH) {
sflags = append(sflags, "psh")
}
if 0 != (tcp.Flags & TCP_RST) {
sflags = append(sflags, "rst")
}
if 0 != (tcp.Flags & TCP_URG) {
sflags = append(sflags, "urg")
}
if 0 != (tcp.Flags & TCP_NS) {
sflags = append(sflags, "ns")
}
if 0 != (tcp.Flags & TCP_CWR) {
sflags = append(sflags, "cwr")
}
if 0 != (tcp.Flags & TCP_ECE) {
sflags = append(sflags, "ece")
}
return fmt.Sprintf("[%s]", strings.Join(sflags, " "))
}
type Udphdr struct {
SrcPort uint16
DestPort uint16
Length uint16
Checksum uint16
}
func (p *Packet) decodeUdp() {
if len(p.Payload) < 8 {
return
}
pkt := p.Payload
udp := new(Udphdr)
udp.SrcPort = binary.BigEndian.Uint16(pkt[0:2])
udp.DestPort = binary.BigEndian.Uint16(pkt[2:4])
udp.Length = binary.BigEndian.Uint16(pkt[4:6])
udp.Checksum = binary.BigEndian.Uint16(pkt[6:8])
p.Headers = append(p.Headers, udp)
p.UDP = udp
if len(p.Payload) >= 8 {
p.Payload = pkt[8:]
}
}
func (udp *Udphdr) String(hdr addrHdr) string {
return fmt.Sprintf("UDP %s:%d > %s:%d LEN=%d CHKSUM=%d",
hdr.SrcAddr(), int(udp.SrcPort), hdr.DestAddr(), int(udp.DestPort),
int(udp.Length), int(udp.Checksum))
}
type Icmphdr struct {
Type uint8
Code uint8
Checksum uint16
Id uint16
Seq uint16
Data []byte
}
func (p *Packet) decodeIcmp() *Icmphdr {
if len(p.Payload) < 8 {
return nil
}
pkt := p.Payload
icmp := new(Icmphdr)
icmp.Type = pkt[0]
icmp.Code = pkt[1]
icmp.Checksum = binary.BigEndian.Uint16(pkt[2:4])
icmp.Id = binary.BigEndian.Uint16(pkt[4:6])
icmp.Seq = binary.BigEndian.Uint16(pkt[6:8])
p.Payload = pkt[8:]
p.Headers = append(p.Headers, icmp)
return icmp
}
func (icmp *Icmphdr) String(hdr addrHdr) string {
return fmt.Sprintf("ICMP %s > %s Type = %d Code = %d ",
hdr.SrcAddr(), hdr.DestAddr(), icmp.Type, icmp.Code)
}
func (icmp *Icmphdr) TypeString() (result string) {
switch icmp.Type {
case 0:
result = fmt.Sprintf("Echo reply seq=%d", icmp.Seq)
case 3:
switch icmp.Code {
case 0:
result = "Network unreachable"
case 1:
result = "Host unreachable"
case 2:
result = "Protocol unreachable"
case 3:
result = "Port unreachable"
default:
result = "Destination unreachable"
}
case 8:
result = fmt.Sprintf("Echo request seq=%d", icmp.Seq)
case 30:
result = "Traceroute"
}
return
}
type Ip6hdr struct {
// http://www.networksorcery.com/enp/protocol/ipv6.htm
Version uint8 // 4 bits
TrafficClass uint8 // 8 bits
FlowLabel uint32 // 20 bits
Length uint16 // 16 bits
NextHeader uint8 // 8 bits, same as Protocol in Iphdr
HopLimit uint8 // 8 bits
SrcIp []byte // 16 bytes
DestIp []byte // 16 bytes
}
func (p *Packet) decodeIp6() {
if len(p.Payload) < 40 {
return
}
pkt := p.Payload
ip6 := new(Ip6hdr)
ip6.Version = uint8(pkt[0]) >> 4
ip6.TrafficClass = uint8((binary.BigEndian.Uint16(pkt[0:2]) >> 4) & 0x00FF)
ip6.FlowLabel = binary.BigEndian.Uint32(pkt[0:4]) & 0x000FFFFF
ip6.Length = binary.BigEndian.Uint16(pkt[4:6])
ip6.NextHeader = pkt[6]
ip6.HopLimit = pkt[7]
ip6.SrcIp = pkt[8:24]
ip6.DestIp = pkt[24:40]
if len(p.Payload) >= 40 {
p.Payload = pkt[40:]
}
p.Headers = append(p.Headers, ip6)
switch ip6.NextHeader {
case IP_TCP:
p.decodeTcp()
case IP_UDP:
p.decodeUdp()
case IP_ICMP:
p.decodeIcmp()
case IP_INIP:
p.decodeIp()
}
}
func (ip6 *Ip6hdr) SrcAddr() string { return net.IP(ip6.SrcIp).String() }
func (ip6 *Ip6hdr) DestAddr() string { return net.IP(ip6.DestIp).String() }
func (ip6 *Ip6hdr) Len() int { return int(ip6.Length) }

206
cmd/vendor/github.com/akrennmair/gopcap/io.go generated vendored
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@ -1,206 +0,0 @@
package pcap
import (
"encoding/binary"
"fmt"
"io"
"time"
)
// FileHeader is the parsed header of a pcap file.
// http://wiki.wireshark.org/Development/LibpcapFileFormat
type FileHeader struct {
MagicNumber uint32
VersionMajor uint16
VersionMinor uint16
TimeZone int32
SigFigs uint32
SnapLen uint32
Network uint32
}
type PacketTime struct {
Sec int32
Usec int32
}
// Convert the PacketTime to a go Time struct.
func (p *PacketTime) Time() time.Time {
return time.Unix(int64(p.Sec), int64(p.Usec)*1000)
}
// Packet is a single packet parsed from a pcap file.
//
// Convenient access to IP, TCP, and UDP headers is provided after Decode()
// is called if the packet is of the appropriate type.
type Packet struct {
Time time.Time // packet send/receive time
Caplen uint32 // bytes stored in the file (caplen <= len)
Len uint32 // bytes sent/received
Data []byte // packet data
Type int // protocol type, see LINKTYPE_*
DestMac uint64
SrcMac uint64
Headers []interface{} // decoded headers, in order
Payload []byte // remaining non-header bytes
IP *Iphdr // IP header (for IP packets, after decoding)
TCP *Tcphdr // TCP header (for TCP packets, after decoding)
UDP *Udphdr // UDP header (for UDP packets after decoding)
}
// Reader parses pcap files.
type Reader struct {
flip bool
buf io.Reader
err error
fourBytes []byte
twoBytes []byte
sixteenBytes []byte
Header FileHeader
}
// NewReader reads pcap data from an io.Reader.
func NewReader(reader io.Reader) (*Reader, error) {
r := &Reader{
buf: reader,
fourBytes: make([]byte, 4),
twoBytes: make([]byte, 2),
sixteenBytes: make([]byte, 16),
}
switch magic := r.readUint32(); magic {
case 0xa1b2c3d4:
r.flip = false
case 0xd4c3b2a1:
r.flip = true
default:
return nil, fmt.Errorf("pcap: bad magic number: %0x", magic)
}
r.Header = FileHeader{
MagicNumber: 0xa1b2c3d4,
VersionMajor: r.readUint16(),
VersionMinor: r.readUint16(),
TimeZone: r.readInt32(),
SigFigs: r.readUint32(),
SnapLen: r.readUint32(),
Network: r.readUint32(),
}
return r, nil
}
// Next returns the next packet or nil if no more packets can be read.
func (r *Reader) Next() *Packet {
d := r.sixteenBytes
r.err = r.read(d)
if r.err != nil {
return nil
}
timeSec := asUint32(d[0:4], r.flip)
timeUsec := asUint32(d[4:8], r.flip)
capLen := asUint32(d[8:12], r.flip)
origLen := asUint32(d[12:16], r.flip)
data := make([]byte, capLen)
if r.err = r.read(data); r.err != nil {
return nil
}
return &Packet{
Time: time.Unix(int64(timeSec), int64(timeUsec)),
Caplen: capLen,
Len: origLen,
Data: data,
}
}
func (r *Reader) read(data []byte) error {
var err error
n, err := r.buf.Read(data)
for err == nil && n != len(data) {
var chunk int
chunk, err = r.buf.Read(data[n:])
n += chunk
}
if len(data) == n {
return nil
}
return err
}
func (r *Reader) readUint32() uint32 {
data := r.fourBytes
if r.err = r.read(data); r.err != nil {
return 0
}
return asUint32(data, r.flip)
}
func (r *Reader) readInt32() int32 {
data := r.fourBytes
if r.err = r.read(data); r.err != nil {
return 0
}
return int32(asUint32(data, r.flip))
}
func (r *Reader) readUint16() uint16 {
data := r.twoBytes
if r.err = r.read(data); r.err != nil {
return 0
}
return asUint16(data, r.flip)
}
// Writer writes a pcap file.
type Writer struct {
writer io.Writer
buf []byte
}
// NewWriter creates a Writer that stores output in an io.Writer.
// The FileHeader is written immediately.
func NewWriter(writer io.Writer, header *FileHeader) (*Writer, error) {
w := &Writer{
writer: writer,
buf: make([]byte, 24),
}
binary.LittleEndian.PutUint32(w.buf, header.MagicNumber)
binary.LittleEndian.PutUint16(w.buf[4:], header.VersionMajor)
binary.LittleEndian.PutUint16(w.buf[6:], header.VersionMinor)
binary.LittleEndian.PutUint32(w.buf[8:], uint32(header.TimeZone))
binary.LittleEndian.PutUint32(w.buf[12:], header.SigFigs)
binary.LittleEndian.PutUint32(w.buf[16:], header.SnapLen)
binary.LittleEndian.PutUint32(w.buf[20:], header.Network)
if _, err := writer.Write(w.buf); err != nil {
return nil, err
}
return w, nil
}
// Writer writes a packet to the underlying writer.
func (w *Writer) Write(pkt *Packet) error {
binary.LittleEndian.PutUint32(w.buf, uint32(pkt.Time.Unix()))
binary.LittleEndian.PutUint32(w.buf[4:], uint32(pkt.Time.Nanosecond()))
binary.LittleEndian.PutUint32(w.buf[8:], uint32(pkt.Time.Unix()))
binary.LittleEndian.PutUint32(w.buf[12:], pkt.Len)
if _, err := w.writer.Write(w.buf[:16]); err != nil {
return err
}
_, err := w.writer.Write(pkt.Data)
return err
}
func asUint32(data []byte, flip bool) uint32 {
if flip {
return binary.BigEndian.Uint32(data)
}
return binary.LittleEndian.Uint32(data)
}
func asUint16(data []byte, flip bool) uint16 {
if flip {
return binary.BigEndian.Uint16(data)
}
return binary.LittleEndian.Uint16(data)
}

266
cmd/vendor/github.com/akrennmair/gopcap/pcap.go generated vendored
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@ -1,266 +0,0 @@
// Interface to both live and offline pcap parsing.
package pcap
/*
#cgo linux LDFLAGS: -lpcap
#cgo freebsd LDFLAGS: -lpcap
#cgo darwin LDFLAGS: -lpcap
#cgo windows CFLAGS: -I C:/WpdPack/Include
#cgo windows,386 LDFLAGS: -L C:/WpdPack/Lib -lwpcap
#cgo windows,amd64 LDFLAGS: -L C:/WpdPack/Lib/x64 -lwpcap
#include <stdlib.h>
#include <pcap.h>
// Workaround for not knowing how to cast to const u_char**
int hack_pcap_next_ex(pcap_t *p, struct pcap_pkthdr **pkt_header,
u_char **pkt_data) {
return pcap_next_ex(p, pkt_header, (const u_char **)pkt_data);
}
*/
import "C"
import (
"errors"
"net"
"syscall"
"time"
"unsafe"
)
type Pcap struct {
cptr *C.pcap_t
}
type Stat struct {
PacketsReceived uint32
PacketsDropped uint32
PacketsIfDropped uint32
}
type Interface struct {
Name string
Description string
Addresses []IFAddress
// TODO: add more elements
}
type IFAddress struct {
IP net.IP
Netmask net.IPMask
// TODO: add broadcast + PtP dst ?
}
func (p *Pcap) Next() (pkt *Packet) {
rv, _ := p.NextEx()
return rv
}
// Openlive opens a device and returns a *Pcap handler
func Openlive(device string, snaplen int32, promisc bool, timeout_ms int32) (handle *Pcap, err error) {
var buf *C.char
buf = (*C.char)(C.calloc(ERRBUF_SIZE, 1))
h := new(Pcap)
var pro int32
if promisc {
pro = 1
}
dev := C.CString(device)
defer C.free(unsafe.Pointer(dev))
h.cptr = C.pcap_open_live(dev, C.int(snaplen), C.int(pro), C.int(timeout_ms), buf)
if nil == h.cptr {
handle = nil
err = errors.New(C.GoString(buf))
} else {
handle = h
}
C.free(unsafe.Pointer(buf))
return
}
func Openoffline(file string) (handle *Pcap, err error) {
var buf *C.char
buf = (*C.char)(C.calloc(ERRBUF_SIZE, 1))
h := new(Pcap)
cf := C.CString(file)
defer C.free(unsafe.Pointer(cf))
h.cptr = C.pcap_open_offline(cf, buf)
if nil == h.cptr {
handle = nil
err = errors.New(C.GoString(buf))
} else {
handle = h
}
C.free(unsafe.Pointer(buf))
return
}
func (p *Pcap) NextEx() (pkt *Packet, result int32) {
var pkthdr *C.struct_pcap_pkthdr
var buf_ptr *C.u_char
var buf unsafe.Pointer
result = int32(C.hack_pcap_next_ex(p.cptr, &pkthdr, &buf_ptr))
buf = unsafe.Pointer(buf_ptr)
if nil == buf {
return
}
pkt = new(Packet)
pkt.Time = time.Unix(int64(pkthdr.ts.tv_sec), int64(pkthdr.ts.tv_usec)*1000)
pkt.Caplen = uint32(pkthdr.caplen)
pkt.Len = uint32(pkthdr.len)
pkt.Data = C.GoBytes(buf, C.int(pkthdr.caplen))
return
}
func (p *Pcap) Close() {
C.pcap_close(p.cptr)
}
func (p *Pcap) Geterror() error {
return errors.New(C.GoString(C.pcap_geterr(p.cptr)))
}
func (p *Pcap) Getstats() (stat *Stat, err error) {
var cstats _Ctype_struct_pcap_stat
if -1 == C.pcap_stats(p.cptr, &cstats) {
return nil, p.Geterror()
}
stats := new(Stat)
stats.PacketsReceived = uint32(cstats.ps_recv)
stats.PacketsDropped = uint32(cstats.ps_drop)
stats.PacketsIfDropped = uint32(cstats.ps_ifdrop)
return stats, nil
}
func (p *Pcap) Setfilter(expr string) (err error) {
var bpf _Ctype_struct_bpf_program
cexpr := C.CString(expr)
defer C.free(unsafe.Pointer(cexpr))
if -1 == C.pcap_compile(p.cptr, &bpf, cexpr, 1, 0) {
return p.Geterror()
}
if -1 == C.pcap_setfilter(p.cptr, &bpf) {
C.pcap_freecode(&bpf)
return p.Geterror()
}
C.pcap_freecode(&bpf)
return nil
}
func Version() string {
return C.GoString(C.pcap_lib_version())
}
func (p *Pcap) Datalink() int {
return int(C.pcap_datalink(p.cptr))
}
func (p *Pcap) Setdatalink(dlt int) error {
if -1 == C.pcap_set_datalink(p.cptr, C.int(dlt)) {
return p.Geterror()
}
return nil
}
func DatalinkValueToName(dlt int) string {
if name := C.pcap_datalink_val_to_name(C.int(dlt)); name != nil {
return C.GoString(name)
}
return ""
}
func DatalinkValueToDescription(dlt int) string {
if desc := C.pcap_datalink_val_to_description(C.int(dlt)); desc != nil {
return C.GoString(desc)
}
return ""
}
func Findalldevs() (ifs []Interface, err error) {
var buf *C.char
buf = (*C.char)(C.calloc(ERRBUF_SIZE, 1))
defer C.free(unsafe.Pointer(buf))
var alldevsp *C.pcap_if_t
if -1 == C.pcap_findalldevs((**C.pcap_if_t)(&alldevsp), buf) {
return nil, errors.New(C.GoString(buf))
}
defer C.pcap_freealldevs((*C.pcap_if_t)(alldevsp))
dev := alldevsp
var i uint32
for i = 0; dev != nil; dev = (*C.pcap_if_t)(dev.next) {
i++
}
ifs = make([]Interface, i)
dev = alldevsp
for j := uint32(0); dev != nil; dev = (*C.pcap_if_t)(dev.next) {
var iface Interface
iface.Name = C.GoString(dev.name)
iface.Description = C.GoString(dev.description)
iface.Addresses = findalladdresses(dev.addresses)
// TODO: add more elements
ifs[j] = iface
j++
}
return
}
func findalladdresses(addresses *_Ctype_struct_pcap_addr) (retval []IFAddress) {
// TODO - make it support more than IPv4 and IPv6?
retval = make([]IFAddress, 0, 1)
for curaddr := addresses; curaddr != nil; curaddr = (*_Ctype_struct_pcap_addr)(curaddr.next) {
var a IFAddress
var err error
if a.IP, err = sockaddr_to_IP((*syscall.RawSockaddr)(unsafe.Pointer(curaddr.addr))); err != nil {
continue
}
if a.Netmask, err = sockaddr_to_IP((*syscall.RawSockaddr)(unsafe.Pointer(curaddr.addr))); err != nil {
continue
}
retval = append(retval, a)
}
return
}
func sockaddr_to_IP(rsa *syscall.RawSockaddr) (IP []byte, err error) {
switch rsa.Family {
case syscall.AF_INET:
pp := (*syscall.RawSockaddrInet4)(unsafe.Pointer(rsa))
IP = make([]byte, 4)
for i := 0; i < len(IP); i++ {
IP[i] = pp.Addr[i]
}
return
case syscall.AF_INET6:
pp := (*syscall.RawSockaddrInet6)(unsafe.Pointer(rsa))
IP = make([]byte, 16)
for i := 0; i < len(IP); i++ {
IP[i] = pp.Addr[i]
}
return
}
err = errors.New("Unsupported address type")
return
}
func (p *Pcap) Inject(data []byte) (err error) {
buf := (*C.char)(C.malloc((C.size_t)(len(data))))
for i := 0; i < len(data); i++ {
*(*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(buf)) + uintptr(i))) = data[i]
}
if -1 == C.pcap_sendpacket(p.cptr, (*C.u_char)(unsafe.Pointer(buf)), (C.int)(len(data))) {
err = p.Geterror()
}
C.free(unsafe.Pointer(buf))
return
}

23
tools/etcd-top/README.md
View File

@ -1,23 +0,0 @@
# etcd-top
etcd realtime workload analyzer. Useful for rapid diagnosis of production usage issues and analysis of production request distributions.
usage:
```
-iface="eth0": interface for sniffing traffic on
-period=1: seconds between submissions
-ports="2379": etcd listening ports
-promiscuous=true: whether to perform promiscuous sniffing or not.
-topk=10: submit stats for the top <K> sniffed paths
```
result:
```
go run etcd-top.go --period=1 -topk=3
1440035702 sniffed 1074 requests over last 1 seconds
Top 3 most popular http requests:
Sum Rate Verb Path
1305 22 GET /v2/keys/c
1302 8 GET /v2/keys/S
1297 10 GET /v2/keys/h
```

16
tools/etcd-top/doc.go
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@ -1,16 +0,0 @@
// Copyright 2016 The etcd 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.
// etcd-top is a utility for analyzing etcd v2 API workload traffic.
package main

229
tools/etcd-top/etcd-top.go
View File

@ -1,229 +0,0 @@
// Copyright 2015 The etcd 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 main
import (
"bufio"
"bytes"
"flag"
"fmt"
"math"
"net/http"
"os"
"runtime"
"sort"
"strconv"
"strings"
"time"
"github.com/akrennmair/gopcap"
"github.com/spacejam/loghisto"
)
type nameSum struct {
Name string
Sum float64
Rate float64
}
type nameSums []nameSum
func (n nameSums) Len() int {
return len(n)
}
func (n nameSums) Less(i, j int) bool {
return n[i].Sum > n[j].Sum
}
func (n nameSums) Swap(i, j int) {
n[i], n[j] = n[j], n[i]
}
// This function listens for periodic metrics from the loghisto metric system,
// and upon receipt of a batch of them it will print out the desired topK.
func statPrinter(metricStream chan *loghisto.ProcessedMetricSet, topK, period uint) {
for m := range metricStream {
requestCounter := float64(0)
nvs := nameSums{}
for k, v := range m.Metrics {
// loghisto adds _rate suffixed metrics for counters and histograms
if strings.HasSuffix(k, "_rate") && !strings.HasSuffix(k, "_rate_rate") {
continue
}
nvs = append(nvs, nameSum{
Name: k,
Sum: v,
Rate: m.Metrics[k+"_rate"],
})
requestCounter += m.Metrics[k+"_rate"]
}
fmt.Printf("\n%d sniffed %d requests over last %d seconds\n\n", time.Now().Unix(),
uint(requestCounter), period)
if len(nvs) == 0 {
continue
}
sort.Sort(nvs)
fmt.Printf("Top %d most popular http requests:\n", topK)
fmt.Println("Total Sum Period Sum Verb Path")
for _, nv := range nvs[0:int(math.Min(float64(len(nvs)), float64(topK)))] {
fmt.Printf("%9.1d %7.1d %s\n", int(nv.Sum), int(nv.Rate), nv.Name)
}
}
}
// packetDecoder decodes packets and hands them off to the streamRouter
func packetDecoder(packetsIn chan *pcap.Packet, packetsOut chan *pcap.Packet) {
for pkt := range packetsIn {
pkt.Decode()
select {
case packetsOut <- pkt:
default:
fmt.Fprint(os.Stderr, "shedding at decoder!")
}
}
}
// processor tries to parse an http request from each packet, and if
// successful it records metrics about it in the loghisto metric system.
func processor(ms *loghisto.MetricSystem, packetsIn chan *pcap.Packet) {
for pkt := range packetsIn {
req, reqErr := http.ReadRequest(bufio.NewReader(bytes.NewReader(pkt.Payload)))
if reqErr == nil {
ms.Counter(req.Method+" "+req.URL.Path, 1)
}
}
}
// streamRouter takes a decoded packet and routes it to a processor that can deal with all requests
// and responses for this particular TCP connection. This allows the processor to own a local map
// of requests so that it can avoid coordinating with other goroutines to perform analysis.
func streamRouter(ports []uint16, parsedPackets chan *pcap.Packet, processors []chan *pcap.Packet) {
for pkt := range parsedPackets {
if pkt.TCP == nil {
continue
}
clientPort := uint16(0)
for _, p := range ports {
if pkt.TCP.SrcPort == p {
clientPort = pkt.TCP.DestPort
break
}
if pkt.TCP.DestPort == p {
clientPort = pkt.TCP.SrcPort
break
}
}
if clientPort != 0 {
// client Port can be assumed to have sufficient entropy for
// distribution among processors, and we want the same
// tcp stream to go to the same processor every time
// so that if we do proper packet reconstruction it will
// be easier.
select {
case processors[int(clientPort)%len(processors)] <- pkt:
default:
fmt.Fprint(os.Stderr, "Shedding load at router!")
}
}
}
}
// 1. parse args
// 2. start the loghisto metric system
// 3. start the processing and printing goroutines
// 4. open the pcap handler
// 5. hand off packets from the handler to the decoder
func main() {
portsArg := flag.String("ports", "2379", "etcd listening ports")
iface := flag.String("iface", "eth0", "interface for sniffing traffic on")
promisc := flag.Bool("promiscuous", true, "promiscuous mode")
period := flag.Uint("period", 1, "seconds between submissions")
topK := flag.Uint("topk", 10, "submit stats for the top <K> sniffed paths")
flag.Parse()
numCPU := runtime.NumCPU()
runtime.GOMAXPROCS(numCPU)
ms := loghisto.NewMetricSystem(time.Duration(*period)*time.Second, false)
ms.Start()
metricStream := make(chan *loghisto.ProcessedMetricSet, 2)
ms.SubscribeToProcessedMetrics(metricStream)
defer ms.UnsubscribeFromProcessedMetrics(metricStream)
go statPrinter(metricStream, *topK, *period)
ports := []uint16{}
for _, p := range strings.Split(*portsArg, ",") {
port, err := strconv.Atoi(p)
if err == nil {
ports = append(ports, uint16(port))
} else {
fmt.Fprintf(os.Stderr, "Failed to parse port \"%s\": %v\n", p, err)
os.Exit(1)
}
}
if len(ports) == 0 {
fmt.Fprint(os.Stderr, "No ports given! Exiting.\n")
os.Exit(1)
}
// We choose 1518 for the snaplen because it's the default
// ethernet MTU at the link layer. We choose 1000 for the
// timeout based on a measurement for its impact on latency
// impact, but it is less precise.
h, err := pcap.Openlive(*iface, 1518, *promisc, 1000)
if err != nil {
fmt.Fprintf(os.Stderr, "%v", err)
os.Exit(1)
}
defer h.Close()
portArray := strings.Split(*portsArg, ",")
dst := strings.Join(portArray, " or dst port ")
src := strings.Join(portArray, " or src port ")
filter := fmt.Sprintf("tcp and (dst port %s or src port %s)", dst, src)
fmt.Println("using bpf filter: ", filter)
if err := h.Setfilter(filter); err != nil {
fmt.Fprintf(os.Stderr, "%v", err)
os.Exit(1)
}
unparsedPackets := make(chan *pcap.Packet, 16384)
parsedPackets := make(chan *pcap.Packet, 16384)
for i := 0; i < int(math.Max(2, float64(numCPU/4))); i++ {
go packetDecoder(unparsedPackets, parsedPackets)
}
processors := []chan *pcap.Packet{}
for i := 0; i < int(math.Max(2, float64(numCPU/4))); i++ {
p := make(chan *pcap.Packet, 16384)
processors = append(processors, p)
go processor(ms, p)
}
go streamRouter(ports, parsedPackets, processors)
for {
pkt := h.Next()
if pkt != nil {
select {
case unparsedPackets <- pkt:
default:
fmt.Fprint(os.Stderr, "SHEDDING IN MAIN")
}
}
}
}