mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
Merge pull request #32505 from fcrisciani/conntrack_test
Conntrack flush support
This commit is contained in:
commit
f30e94a495
20 changed files with 919 additions and 23 deletions
|
@ -12,6 +12,7 @@ import (
|
|||
"os"
|
||||
"path/filepath"
|
||||
"strings"
|
||||
"syscall"
|
||||
"time"
|
||||
|
||||
"github.com/docker/docker/api/types"
|
||||
|
@ -1789,3 +1790,56 @@ func (s *DockerNetworkSuite) TestDockerNetworkDisconnectFromBridge(c *check.C) {
|
|||
_, _, err := dockerCmdWithError("network", "disconnect", network, name)
|
||||
c.Assert(err, check.IsNil)
|
||||
}
|
||||
|
||||
// TestConntrackFlowsLeak covers the failure scenario of ticket: https://github.com/docker/docker/issues/8795
|
||||
// Validates that conntrack is correctly cleaned once a container is destroyed
|
||||
func (s *DockerNetworkSuite) TestConntrackFlowsLeak(c *check.C) {
|
||||
testRequires(c, IsAmd64, DaemonIsLinux, Network)
|
||||
|
||||
// Create a new network
|
||||
dockerCmd(c, "network", "create", "--subnet=192.168.10.0/24", "--gateway=192.168.10.1", "-o", "com.docker.network.bridge.host_binding_ipv4=192.168.10.1", "testbind")
|
||||
assertNwIsAvailable(c, "testbind")
|
||||
|
||||
// Launch the server, this will remain listening on an exposed port and reply to any request in a ping/pong fashion
|
||||
cmd := "while true; do echo hello | nc -w 1 -lu 8080; done"
|
||||
_, _, err := dockerCmdWithError("run", "-d", "--name", "server", "--net", "testbind", "-p", "8080:8080/udp", "appropriate/nc", "sh", "-c", cmd)
|
||||
c.Assert(err, check.IsNil)
|
||||
|
||||
// Launch a container client, here the objective is to create a flow that is natted in order to expose the bug
|
||||
cmd = "echo world | nc -q 1 -u 192.168.10.1 8080"
|
||||
_, _, err = dockerCmdWithError("run", "-d", "--name", "client", "--net=host", "appropriate/nc", "sh", "-c", cmd)
|
||||
c.Assert(err, check.IsNil)
|
||||
|
||||
// Get all the flows using netlink
|
||||
flows, err := netlink.ConntrackTableList(netlink.ConntrackTable, syscall.AF_INET)
|
||||
c.Assert(err, check.IsNil)
|
||||
var flowMatch int
|
||||
for _, flow := range flows {
|
||||
// count only the flows that we are interested in, skipping others that can be laying around the host
|
||||
if flow.Forward.Protocol == syscall.IPPROTO_UDP &&
|
||||
flow.Forward.DstIP.Equal(net.ParseIP("192.168.10.1")) &&
|
||||
flow.Forward.DstPort == 8080 {
|
||||
flowMatch++
|
||||
}
|
||||
}
|
||||
// The client should have created only 1 flow
|
||||
c.Assert(flowMatch, checker.Equals, 1)
|
||||
|
||||
// Now delete the server, this will trigger the conntrack cleanup
|
||||
err = deleteContainer("server")
|
||||
c.Assert(err, checker.IsNil)
|
||||
|
||||
// Fetch again all the flows and validate that there is no server flow in the conntrack laying around
|
||||
flows, err = netlink.ConntrackTableList(netlink.ConntrackTable, syscall.AF_INET)
|
||||
c.Assert(err, check.IsNil)
|
||||
flowMatch = 0
|
||||
for _, flow := range flows {
|
||||
if flow.Forward.Protocol == syscall.IPPROTO_UDP &&
|
||||
flow.Forward.DstIP.Equal(net.ParseIP("192.168.10.1")) &&
|
||||
flow.Forward.DstPort == 8080 {
|
||||
flowMatch++
|
||||
}
|
||||
}
|
||||
// All the flows have to be gone
|
||||
c.Assert(flowMatch, checker.Equals, 0)
|
||||
}
|
||||
|
|
|
@ -24,7 +24,7 @@ github.com/RackSec/srslog 456df3a81436d29ba874f3590eeeee25d666f8a5
|
|||
github.com/imdario/mergo 0.2.1
|
||||
|
||||
#get libnetwork packages
|
||||
github.com/docker/libnetwork ab8f7e61743aa7e54c5d0dad0551543adadc33cf
|
||||
github.com/docker/libnetwork b13e0604016a4944025aaff521d9c125850b0d04
|
||||
github.com/docker/go-events 18b43f1bc85d9cdd42c05a6cd2d444c7a200a894
|
||||
github.com/armon/go-radix e39d623f12e8e41c7b5529e9a9dd67a1e2261f80
|
||||
github.com/armon/go-metrics eb0af217e5e9747e41dd5303755356b62d28e3ec
|
||||
|
@ -34,7 +34,7 @@ github.com/hashicorp/go-multierror fcdddc395df1ddf4247c69bd436e84cfa0733f7e
|
|||
github.com/hashicorp/serf 598c54895cc5a7b1a24a398d635e8c0ea0959870
|
||||
github.com/docker/libkv 1d8431073ae03cdaedb198a89722f3aab6d418ef
|
||||
github.com/vishvananda/netns 604eaf189ee867d8c147fafc28def2394e878d25
|
||||
github.com/vishvananda/netlink c682914b0b231f6cad204a86e565551e51d387c0
|
||||
github.com/vishvananda/netlink 1e86b2bee5b6a7d377e4c02bb7f98209d6a7297c
|
||||
github.com/BurntSushi/toml f706d00e3de6abe700c994cdd545a1a4915af060
|
||||
github.com/samuel/go-zookeeper d0e0d8e11f318e000a8cc434616d69e329edc374
|
||||
github.com/deckarep/golang-set ef32fa3046d9f249d399f98ebaf9be944430fd1d
|
||||
|
|
3
vendor/github.com/docker/libnetwork/controller.go
generated
vendored
3
vendor/github.com/docker/libnetwork/controller.go
generated
vendored
|
@ -47,6 +47,7 @@ import (
|
|||
"container/heap"
|
||||
"fmt"
|
||||
"net"
|
||||
"path/filepath"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
@ -979,6 +980,8 @@ func (c *controller) NewSandbox(containerID string, options ...SandboxOption) (s
|
|||
|
||||
if sb.ingress {
|
||||
c.ingressSandbox = sb
|
||||
sb.config.hostsPath = filepath.Join(c.cfg.Daemon.DataDir, "/network/files/hosts")
|
||||
sb.config.resolvConfPath = filepath.Join(c.cfg.Daemon.DataDir, "/network/files/resolv.conf")
|
||||
sb.id = "ingress_sbox"
|
||||
}
|
||||
c.Unlock()
|
||||
|
|
7
vendor/github.com/docker/libnetwork/drivers/bridge/bridge.go
generated
vendored
7
vendor/github.com/docker/libnetwork/drivers/bridge/bridge.go
generated
vendored
|
@ -1346,6 +1346,13 @@ func (d *driver) RevokeExternalConnectivity(nid, eid string) error {
|
|||
|
||||
endpoint.portMapping = nil
|
||||
|
||||
// Clean the connection tracker state of the host for the specific endpoint
|
||||
// The host kernel keeps track of the connections (TCP and UDP), so if a new endpoint gets the same IP of
|
||||
// this one (that is going down), is possible that some of the packets would not be routed correctly inside
|
||||
// the new endpoint
|
||||
// Deeper details: https://github.com/docker/docker/issues/8795
|
||||
clearEndpointConnections(d.nlh, endpoint)
|
||||
|
||||
if err = d.storeUpdate(endpoint); err != nil {
|
||||
return fmt.Errorf("failed to update bridge endpoint %s to store: %v", endpoint.id[0:7], err)
|
||||
}
|
||||
|
|
13
vendor/github.com/docker/libnetwork/drivers/bridge/setup_ip_tables.go
generated
vendored
13
vendor/github.com/docker/libnetwork/drivers/bridge/setup_ip_tables.go
generated
vendored
|
@ -7,6 +7,7 @@ import (
|
|||
|
||||
"github.com/Sirupsen/logrus"
|
||||
"github.com/docker/libnetwork/iptables"
|
||||
"github.com/vishvananda/netlink"
|
||||
)
|
||||
|
||||
// DockerChain: DOCKER iptable chain name
|
||||
|
@ -348,3 +349,15 @@ func setupInternalNetworkRules(bridgeIface string, addr net.Addr, icc, insert bo
|
|||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func clearEndpointConnections(nlh *netlink.Handle, ep *bridgeEndpoint) {
|
||||
var ipv4List []net.IP
|
||||
var ipv6List []net.IP
|
||||
if ep.addr != nil {
|
||||
ipv4List = append(ipv4List, ep.addr.IP)
|
||||
}
|
||||
if ep.addrv6 != nil {
|
||||
ipv6List = append(ipv6List, ep.addrv6.IP)
|
||||
}
|
||||
iptables.DeleteConntrackEntries(nlh, ipv4List, ipv6List)
|
||||
}
|
||||
|
|
2
vendor/github.com/docker/libnetwork/endpoint.go
generated
vendored
2
vendor/github.com/docker/libnetwork/endpoint.go
generated
vendored
|
@ -665,7 +665,7 @@ func (ep *endpoint) hasInterface(iName string) bool {
|
|||
|
||||
func (ep *endpoint) Leave(sbox Sandbox, options ...EndpointOption) error {
|
||||
if sbox == nil || sbox.ID() == "" || sbox.Key() == "" {
|
||||
return types.BadRequestErrorf("invalid Sandbox passed to enpoint leave: %v", sbox)
|
||||
return types.BadRequestErrorf("invalid Sandbox passed to endpoint leave: %v", sbox)
|
||||
}
|
||||
|
||||
sb, ok := sbox.(*sandbox)
|
||||
|
|
2
vendor/github.com/docker/libnetwork/error.go
generated
vendored
2
vendor/github.com/docker/libnetwork/error.go
generated
vendored
|
@ -129,7 +129,7 @@ type ActiveEndpointsError struct {
|
|||
}
|
||||
|
||||
func (aee *ActiveEndpointsError) Error() string {
|
||||
return fmt.Sprintf("network %s has active endpoints", aee.name)
|
||||
return fmt.Sprintf("network %s id %s has active endpoints", aee.name, aee.id)
|
||||
}
|
||||
|
||||
// Forbidden denotes the type of this error
|
||||
|
|
59
vendor/github.com/docker/libnetwork/iptables/conntrack.go
generated
vendored
Normal file
59
vendor/github.com/docker/libnetwork/iptables/conntrack.go
generated
vendored
Normal file
|
@ -0,0 +1,59 @@
|
|||
package iptables
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"net"
|
||||
"syscall"
|
||||
|
||||
"github.com/Sirupsen/logrus"
|
||||
"github.com/vishvananda/netlink"
|
||||
)
|
||||
|
||||
var (
|
||||
// ErrConntrackNotConfigurable means that conntrack module is not loaded or does not have the netlink module loaded
|
||||
ErrConntrackNotConfigurable = errors.New("conntrack is not available")
|
||||
)
|
||||
|
||||
// IsConntrackProgrammable returns true if the handle supports the NETLINK_NETFILTER and the base modules are loaded
|
||||
func IsConntrackProgrammable(nlh *netlink.Handle) bool {
|
||||
return nlh.SupportsNetlinkFamily(syscall.NETLINK_NETFILTER)
|
||||
}
|
||||
|
||||
// DeleteConntrackEntries deletes all the conntrack connections on the host for the specified IP
|
||||
// Returns the number of flows deleted for IPv4, IPv6 else error
|
||||
func DeleteConntrackEntries(nlh *netlink.Handle, ipv4List []net.IP, ipv6List []net.IP) (uint, uint, error) {
|
||||
if !IsConntrackProgrammable(nlh) {
|
||||
return 0, 0, ErrConntrackNotConfigurable
|
||||
}
|
||||
|
||||
var totalIPv4FlowPurged uint
|
||||
for _, ipAddress := range ipv4List {
|
||||
flowPurged, err := purgeConntrackState(nlh, syscall.AF_INET, ipAddress)
|
||||
if err != nil {
|
||||
logrus.Warnf("Failed to delete conntrack state for %s: %v", ipAddress, err)
|
||||
continue
|
||||
}
|
||||
totalIPv4FlowPurged += flowPurged
|
||||
}
|
||||
|
||||
var totalIPv6FlowPurged uint
|
||||
for _, ipAddress := range ipv6List {
|
||||
flowPurged, err := purgeConntrackState(nlh, syscall.AF_INET6, ipAddress)
|
||||
if err != nil {
|
||||
logrus.Warnf("Failed to delete conntrack state for %s: %v", ipAddress, err)
|
||||
continue
|
||||
}
|
||||
totalIPv6FlowPurged += flowPurged
|
||||
}
|
||||
|
||||
logrus.Debugf("DeleteConntrackEntries purged ipv4:%d, ipv6:%d", totalIPv4FlowPurged, totalIPv6FlowPurged)
|
||||
return totalIPv4FlowPurged, totalIPv6FlowPurged, nil
|
||||
}
|
||||
|
||||
func purgeConntrackState(nlh *netlink.Handle, family netlink.InetFamily, ipAddress net.IP) (uint, error) {
|
||||
filter := &netlink.ConntrackFilter{}
|
||||
// NOTE: doing the flush using the ipAddress is safe because today there cannot be multiple networks with the same subnet
|
||||
// so it will not be possible to flush flows that are of other containers
|
||||
filter.AddIP(netlink.ConntrackNatAnyIP, ipAddress)
|
||||
return nlh.ConntrackDeleteFilter(netlink.ConntrackTable, family, filter)
|
||||
}
|
4
vendor/github.com/docker/libnetwork/iptables/iptables.go
generated
vendored
4
vendor/github.com/docker/libnetwork/iptables/iptables.go
generated
vendored
|
@ -100,14 +100,14 @@ func detectIptables() {
|
|||
supportsCOpt = supportsCOption(mj, mn, mc)
|
||||
}
|
||||
|
||||
func initIptables() {
|
||||
func initDependencies() {
|
||||
probe()
|
||||
initFirewalld()
|
||||
detectIptables()
|
||||
}
|
||||
|
||||
func initCheck() error {
|
||||
initOnce.Do(initIptables)
|
||||
initOnce.Do(initDependencies)
|
||||
|
||||
if iptablesPath == "" {
|
||||
return ErrIptablesNotFound
|
||||
|
|
16
vendor/github.com/docker/libnetwork/networkdb/delegate.go
generated
vendored
16
vendor/github.com/docker/libnetwork/networkdb/delegate.go
generated
vendored
|
@ -88,12 +88,25 @@ func (nDB *NetworkDB) handleNodeEvent(nEvent *NodeEvent) bool {
|
|||
}
|
||||
|
||||
func (nDB *NetworkDB) handleNetworkEvent(nEvent *NetworkEvent) bool {
|
||||
var flushEntries bool
|
||||
// Update our local clock if the received messages has newer
|
||||
// time.
|
||||
nDB.networkClock.Witness(nEvent.LTime)
|
||||
|
||||
nDB.Lock()
|
||||
defer nDB.Unlock()
|
||||
defer func() {
|
||||
nDB.Unlock()
|
||||
// When a node leaves a network on the last task removal cleanup the
|
||||
// local entries for this network & node combination. When the tasks
|
||||
// on a network are removed we could have missed the gossip updates.
|
||||
// Not doing this cleanup can leave stale entries because bulksyncs
|
||||
// from the node will no longer include this network state.
|
||||
//
|
||||
// deleteNodeNetworkEntries takes nDB lock.
|
||||
if flushEntries {
|
||||
nDB.deleteNodeNetworkEntries(nEvent.NetworkID, nEvent.NodeName)
|
||||
}
|
||||
}()
|
||||
|
||||
if nEvent.NodeName == nDB.config.NodeName {
|
||||
return false
|
||||
|
@ -121,6 +134,7 @@ func (nDB *NetworkDB) handleNetworkEvent(nEvent *NetworkEvent) bool {
|
|||
n.leaving = nEvent.Type == NetworkEventTypeLeave
|
||||
if n.leaving {
|
||||
n.reapTime = reapInterval
|
||||
flushEntries = true
|
||||
}
|
||||
|
||||
nDB.addNetworkNode(nEvent.NetworkID, nEvent.NodeName)
|
||||
|
|
31
vendor/github.com/docker/libnetwork/networkdb/networkdb.go
generated
vendored
31
vendor/github.com/docker/libnetwork/networkdb/networkdb.go
generated
vendored
|
@ -372,6 +372,37 @@ func (nDB *NetworkDB) deleteNetworkEntriesForNode(deletedNode string) {
|
|||
nDB.Unlock()
|
||||
}
|
||||
|
||||
func (nDB *NetworkDB) deleteNodeNetworkEntries(nid, node string) {
|
||||
nDB.Lock()
|
||||
nDB.indexes[byNetwork].WalkPrefix(fmt.Sprintf("/%s", nid),
|
||||
func(path string, v interface{}) bool {
|
||||
oldEntry := v.(*entry)
|
||||
params := strings.Split(path[1:], "/")
|
||||
nid := params[0]
|
||||
tname := params[1]
|
||||
key := params[2]
|
||||
|
||||
if oldEntry.node != node {
|
||||
return false
|
||||
}
|
||||
|
||||
entry := &entry{
|
||||
ltime: oldEntry.ltime,
|
||||
node: node,
|
||||
value: oldEntry.value,
|
||||
deleting: true,
|
||||
reapTime: reapInterval,
|
||||
}
|
||||
|
||||
nDB.indexes[byTable].Insert(fmt.Sprintf("/%s/%s/%s", tname, nid, key), entry)
|
||||
nDB.indexes[byNetwork].Insert(fmt.Sprintf("/%s/%s/%s", nid, tname, key), entry)
|
||||
|
||||
nDB.broadcaster.Write(makeEvent(opDelete, tname, nid, key, entry.value))
|
||||
return false
|
||||
})
|
||||
nDB.Unlock()
|
||||
}
|
||||
|
||||
func (nDB *NetworkDB) deleteNodeTableEntries(node string) {
|
||||
nDB.Lock()
|
||||
nDB.indexes[byTable].Walk(func(path string, v interface{}) bool {
|
||||
|
|
39
vendor/github.com/docker/libnetwork/ns/init_linux.go
generated
vendored
39
vendor/github.com/docker/libnetwork/ns/init_linux.go
generated
vendored
|
@ -75,13 +75,28 @@ func NlHandle() *netlink.Handle {
|
|||
|
||||
func getSupportedNlFamilies() []int {
|
||||
fams := []int{syscall.NETLINK_ROUTE}
|
||||
// NETLINK_XFRM test
|
||||
if err := loadXfrmModules(); err != nil {
|
||||
if checkXfrmSocket() != nil {
|
||||
logrus.Warnf("Could not load necessary modules for IPSEC rules: %v", err)
|
||||
return fams
|
||||
} else {
|
||||
fams = append(fams, syscall.NETLINK_XFRM)
|
||||
}
|
||||
} else {
|
||||
fams = append(fams, syscall.NETLINK_XFRM)
|
||||
}
|
||||
return append(fams, syscall.NETLINK_XFRM)
|
||||
// NETLINK_NETFILTER test
|
||||
if err := loadNfConntrackModules(); err != nil {
|
||||
if checkNfSocket() != nil {
|
||||
logrus.Warnf("Could not load necessary modules for Conntrack: %v", err)
|
||||
} else {
|
||||
fams = append(fams, syscall.NETLINK_NETFILTER)
|
||||
}
|
||||
} else {
|
||||
fams = append(fams, syscall.NETLINK_NETFILTER)
|
||||
}
|
||||
|
||||
return fams
|
||||
}
|
||||
|
||||
func loadXfrmModules() error {
|
||||
|
@ -103,3 +118,23 @@ func checkXfrmSocket() error {
|
|||
syscall.Close(fd)
|
||||
return nil
|
||||
}
|
||||
|
||||
func loadNfConntrackModules() error {
|
||||
if out, err := exec.Command("modprobe", "-va", "nf_conntrack").CombinedOutput(); err != nil {
|
||||
return fmt.Errorf("Running modprobe nf_conntrack failed with message: `%s`, error: %v", strings.TrimSpace(string(out)), err)
|
||||
}
|
||||
if out, err := exec.Command("modprobe", "-va", "nf_conntrack_netlink").CombinedOutput(); err != nil {
|
||||
return fmt.Errorf("Running modprobe nf_conntrack_netlink failed with message: `%s`, error: %v", strings.TrimSpace(string(out)), err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// API check on required nf_conntrack* modules (nf_conntrack, nf_conntrack_netlink)
|
||||
func checkNfSocket() error {
|
||||
fd, err := syscall.Socket(syscall.AF_NETLINK, syscall.SOCK_RAW, syscall.NETLINK_NETFILTER)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
syscall.Close(fd)
|
||||
return nil
|
||||
}
|
||||
|
|
7
vendor/github.com/docker/libnetwork/sandbox.go
generated
vendored
7
vendor/github.com/docker/libnetwork/sandbox.go
generated
vendored
|
@ -644,13 +644,6 @@ func (sb *sandbox) SetKey(basePath string) error {
|
|||
sb.Lock()
|
||||
sb.osSbox = osSbox
|
||||
sb.Unlock()
|
||||
defer func() {
|
||||
if err != nil {
|
||||
sb.Lock()
|
||||
sb.osSbox = nil
|
||||
sb.Unlock()
|
||||
}
|
||||
}()
|
||||
|
||||
// If the resolver was setup before stop it and set it up in the
|
||||
// new osl sandbox.
|
||||
|
|
13
vendor/github.com/vishvananda/netlink/addr_linux.go
generated
vendored
13
vendor/github.com/vishvananda/netlink/addr_linux.go
generated
vendored
|
@ -27,6 +27,19 @@ func (h *Handle) AddrAdd(link Link, addr *Addr) error {
|
|||
return h.addrHandle(link, addr, req)
|
||||
}
|
||||
|
||||
// AddrReplace will replace (or, if not present, add) an IP address on a link device.
|
||||
// Equivalent to: `ip addr replace $addr dev $link`
|
||||
func AddrReplace(link Link, addr *Addr) error {
|
||||
return pkgHandle.AddrReplace(link, addr)
|
||||
}
|
||||
|
||||
// AddrReplace will replace (or, if not present, add) an IP address on a link device.
|
||||
// Equivalent to: `ip addr replace $addr dev $link`
|
||||
func (h *Handle) AddrReplace(link Link, addr *Addr) error {
|
||||
req := h.newNetlinkRequest(syscall.RTM_NEWADDR, syscall.NLM_F_CREATE|syscall.NLM_F_REPLACE|syscall.NLM_F_ACK)
|
||||
return h.addrHandle(link, addr, req)
|
||||
}
|
||||
|
||||
// AddrDel will delete an IP address from a link device.
|
||||
// Equivalent to: `ip addr del $addr dev $link`
|
||||
func AddrDel(link Link, addr *Addr) error {
|
||||
|
|
344
vendor/github.com/vishvananda/netlink/conntrack_linux.go
generated
vendored
Normal file
344
vendor/github.com/vishvananda/netlink/conntrack_linux.go
generated
vendored
Normal file
|
@ -0,0 +1,344 @@
|
|||
package netlink
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/binary"
|
||||
"errors"
|
||||
"fmt"
|
||||
"net"
|
||||
"syscall"
|
||||
|
||||
"github.com/vishvananda/netlink/nl"
|
||||
)
|
||||
|
||||
// ConntrackTableType Conntrack table for the netlink operation
|
||||
type ConntrackTableType uint8
|
||||
|
||||
const (
|
||||
// ConntrackTable Conntrack table
|
||||
// https://github.com/torvalds/linux/blob/master/include/uapi/linux/netfilter/nfnetlink.h -> #define NFNL_SUBSYS_CTNETLINK 1
|
||||
ConntrackTable = 1
|
||||
// ConntrackExpectTable Conntrack expect table
|
||||
// https://github.com/torvalds/linux/blob/master/include/uapi/linux/netfilter/nfnetlink.h -> #define NFNL_SUBSYS_CTNETLINK_EXP 2
|
||||
ConntrackExpectTable = 2
|
||||
)
|
||||
|
||||
const (
|
||||
// backward compatibility with golang 1.6 which does not have io.SeekCurrent
|
||||
seekCurrent = 1
|
||||
)
|
||||
|
||||
// InetFamily Family type
|
||||
type InetFamily uint8
|
||||
|
||||
// -L [table] [options] List conntrack or expectation table
|
||||
// -G [table] parameters Get conntrack or expectation
|
||||
|
||||
// -I [table] parameters Create a conntrack or expectation
|
||||
// -U [table] parameters Update a conntrack
|
||||
// -E [table] [options] Show events
|
||||
|
||||
// -C [table] Show counter
|
||||
// -S Show statistics
|
||||
|
||||
// ConntrackTableList returns the flow list of a table of a specific family
|
||||
// conntrack -L [table] [options] List conntrack or expectation table
|
||||
func ConntrackTableList(table ConntrackTableType, family InetFamily) ([]*ConntrackFlow, error) {
|
||||
return pkgHandle.ConntrackTableList(table, family)
|
||||
}
|
||||
|
||||
// ConntrackTableFlush flushes all the flows of a specified table
|
||||
// conntrack -F [table] Flush table
|
||||
// The flush operation applies to all the family types
|
||||
func ConntrackTableFlush(table ConntrackTableType) error {
|
||||
return pkgHandle.ConntrackTableFlush(table)
|
||||
}
|
||||
|
||||
// ConntrackDeleteFilter deletes entries on the specified table on the base of the filter
|
||||
// conntrack -D [table] parameters Delete conntrack or expectation
|
||||
func ConntrackDeleteFilter(table ConntrackTableType, family InetFamily, filter *ConntrackFilter) (uint, error) {
|
||||
return pkgHandle.ConntrackDeleteFilter(table, family, filter)
|
||||
}
|
||||
|
||||
// ConntrackTableList returns the flow list of a table of a specific family using the netlink handle passed
|
||||
// conntrack -L [table] [options] List conntrack or expectation table
|
||||
func (h *Handle) ConntrackTableList(table ConntrackTableType, family InetFamily) ([]*ConntrackFlow, error) {
|
||||
res, err := h.dumpConntrackTable(table, family)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Deserialize all the flows
|
||||
var result []*ConntrackFlow
|
||||
for _, dataRaw := range res {
|
||||
result = append(result, parseRawData(dataRaw))
|
||||
}
|
||||
|
||||
return result, nil
|
||||
}
|
||||
|
||||
// ConntrackTableFlush flushes all the flows of a specified table using the netlink handle passed
|
||||
// conntrack -F [table] Flush table
|
||||
// The flush operation applies to all the family types
|
||||
func (h *Handle) ConntrackTableFlush(table ConntrackTableType) error {
|
||||
req := h.newConntrackRequest(table, syscall.AF_INET, nl.IPCTNL_MSG_CT_DELETE, syscall.NLM_F_ACK)
|
||||
_, err := req.Execute(syscall.NETLINK_NETFILTER, 0)
|
||||
return err
|
||||
}
|
||||
|
||||
// ConntrackDeleteFilter deletes entries on the specified table on the base of the filter using the netlink handle passed
|
||||
// conntrack -D [table] parameters Delete conntrack or expectation
|
||||
func (h *Handle) ConntrackDeleteFilter(table ConntrackTableType, family InetFamily, filter *ConntrackFilter) (uint, error) {
|
||||
res, err := h.dumpConntrackTable(table, family)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
var matched uint
|
||||
for _, dataRaw := range res {
|
||||
flow := parseRawData(dataRaw)
|
||||
if match := filter.MatchConntrackFlow(flow); match {
|
||||
req2 := h.newConntrackRequest(table, family, nl.IPCTNL_MSG_CT_DELETE, syscall.NLM_F_ACK)
|
||||
// skip the first 4 byte that are the netfilter header, the newConntrackRequest is adding it already
|
||||
req2.AddRawData(dataRaw[4:])
|
||||
req2.Execute(syscall.NETLINK_NETFILTER, 0)
|
||||
matched++
|
||||
}
|
||||
}
|
||||
|
||||
return matched, nil
|
||||
}
|
||||
|
||||
func (h *Handle) newConntrackRequest(table ConntrackTableType, family InetFamily, operation, flags int) *nl.NetlinkRequest {
|
||||
// Create the Netlink request object
|
||||
req := h.newNetlinkRequest((int(table)<<8)|operation, flags)
|
||||
// Add the netfilter header
|
||||
msg := &nl.Nfgenmsg{
|
||||
NfgenFamily: uint8(family),
|
||||
Version: nl.NFNETLINK_V0,
|
||||
ResId: 0,
|
||||
}
|
||||
req.AddData(msg)
|
||||
return req
|
||||
}
|
||||
|
||||
func (h *Handle) dumpConntrackTable(table ConntrackTableType, family InetFamily) ([][]byte, error) {
|
||||
req := h.newConntrackRequest(table, family, nl.IPCTNL_MSG_CT_GET, syscall.NLM_F_DUMP)
|
||||
return req.Execute(syscall.NETLINK_NETFILTER, 0)
|
||||
}
|
||||
|
||||
// The full conntrack flow structure is very complicated and can be found in the file:
|
||||
// http://git.netfilter.org/libnetfilter_conntrack/tree/include/internal/object.h
|
||||
// For the time being, the structure below allows to parse and extract the base information of a flow
|
||||
type ipTuple struct {
|
||||
SrcIP net.IP
|
||||
DstIP net.IP
|
||||
Protocol uint8
|
||||
SrcPort uint16
|
||||
DstPort uint16
|
||||
}
|
||||
|
||||
type ConntrackFlow struct {
|
||||
FamilyType uint8
|
||||
Forward ipTuple
|
||||
Reverse ipTuple
|
||||
}
|
||||
|
||||
func (s *ConntrackFlow) String() string {
|
||||
// conntrack cmd output:
|
||||
// udp 17 src=127.0.0.1 dst=127.0.0.1 sport=4001 dport=1234 [UNREPLIED] src=127.0.0.1 dst=127.0.0.1 sport=1234 dport=4001
|
||||
return fmt.Sprintf("%s\t%d src=%s dst=%s sport=%d dport=%d\tsrc=%s dst=%s sport=%d dport=%d",
|
||||
nl.L4ProtoMap[s.Forward.Protocol], s.Forward.Protocol,
|
||||
s.Forward.SrcIP.String(), s.Forward.DstIP.String(), s.Forward.SrcPort, s.Forward.DstPort,
|
||||
s.Reverse.SrcIP.String(), s.Reverse.DstIP.String(), s.Reverse.SrcPort, s.Reverse.DstPort)
|
||||
}
|
||||
|
||||
// This method parse the ip tuple structure
|
||||
// The message structure is the following:
|
||||
// <len, [CTA_IP_V4_SRC|CTA_IP_V6_SRC], 16 bytes for the IP>
|
||||
// <len, [CTA_IP_V4_DST|CTA_IP_V6_DST], 16 bytes for the IP>
|
||||
// <len, NLA_F_NESTED|nl.CTA_TUPLE_PROTO, 1 byte for the protocol, 3 bytes of padding>
|
||||
// <len, CTA_PROTO_SRC_PORT, 2 bytes for the source port, 2 bytes of padding>
|
||||
// <len, CTA_PROTO_DST_PORT, 2 bytes for the source port, 2 bytes of padding>
|
||||
func parseIpTuple(reader *bytes.Reader, tpl *ipTuple) {
|
||||
for i := 0; i < 2; i++ {
|
||||
_, t, _, v := parseNfAttrTLV(reader)
|
||||
switch t {
|
||||
case nl.CTA_IP_V4_SRC, nl.CTA_IP_V6_SRC:
|
||||
tpl.SrcIP = v
|
||||
case nl.CTA_IP_V4_DST, nl.CTA_IP_V6_DST:
|
||||
tpl.DstIP = v
|
||||
}
|
||||
}
|
||||
// Skip the next 4 bytes nl.NLA_F_NESTED|nl.CTA_TUPLE_PROTO
|
||||
reader.Seek(4, seekCurrent)
|
||||
_, t, _, v := parseNfAttrTLV(reader)
|
||||
if t == nl.CTA_PROTO_NUM {
|
||||
tpl.Protocol = uint8(v[0])
|
||||
}
|
||||
// Skip some padding 3 bytes
|
||||
reader.Seek(3, seekCurrent)
|
||||
for i := 0; i < 2; i++ {
|
||||
_, t, _ := parseNfAttrTL(reader)
|
||||
switch t {
|
||||
case nl.CTA_PROTO_SRC_PORT:
|
||||
parseBERaw16(reader, &tpl.SrcPort)
|
||||
case nl.CTA_PROTO_DST_PORT:
|
||||
parseBERaw16(reader, &tpl.DstPort)
|
||||
}
|
||||
// Skip some padding 2 byte
|
||||
reader.Seek(2, seekCurrent)
|
||||
}
|
||||
}
|
||||
|
||||
func parseNfAttrTLV(r *bytes.Reader) (isNested bool, attrType, len uint16, value []byte) {
|
||||
isNested, attrType, len = parseNfAttrTL(r)
|
||||
|
||||
value = make([]byte, len)
|
||||
binary.Read(r, binary.BigEndian, &value)
|
||||
return isNested, attrType, len, value
|
||||
}
|
||||
|
||||
func parseNfAttrTL(r *bytes.Reader) (isNested bool, attrType, len uint16) {
|
||||
binary.Read(r, nl.NativeEndian(), &len)
|
||||
len -= nl.SizeofNfattr
|
||||
|
||||
binary.Read(r, nl.NativeEndian(), &attrType)
|
||||
isNested = (attrType & nl.NLA_F_NESTED) == nl.NLA_F_NESTED
|
||||
attrType = attrType & (nl.NLA_F_NESTED - 1)
|
||||
|
||||
return isNested, attrType, len
|
||||
}
|
||||
|
||||
func parseBERaw16(r *bytes.Reader, v *uint16) {
|
||||
binary.Read(r, binary.BigEndian, v)
|
||||
}
|
||||
|
||||
func parseRawData(data []byte) *ConntrackFlow {
|
||||
s := &ConntrackFlow{}
|
||||
// First there is the Nfgenmsg header
|
||||
// consume only the family field
|
||||
reader := bytes.NewReader(data)
|
||||
binary.Read(reader, nl.NativeEndian(), &s.FamilyType)
|
||||
|
||||
// skip rest of the Netfilter header
|
||||
reader.Seek(3, seekCurrent)
|
||||
// The message structure is the following:
|
||||
// <len, NLA_F_NESTED|CTA_TUPLE_ORIG> 4 bytes
|
||||
// <len, NLA_F_NESTED|CTA_TUPLE_IP> 4 bytes
|
||||
// flow information of the forward flow
|
||||
// <len, NLA_F_NESTED|CTA_TUPLE_REPLY> 4 bytes
|
||||
// <len, NLA_F_NESTED|CTA_TUPLE_IP> 4 bytes
|
||||
// flow information of the reverse flow
|
||||
for reader.Len() > 0 {
|
||||
nested, t, l := parseNfAttrTL(reader)
|
||||
if nested && t == nl.CTA_TUPLE_ORIG {
|
||||
if nested, t, _ = parseNfAttrTL(reader); nested && t == nl.CTA_TUPLE_IP {
|
||||
parseIpTuple(reader, &s.Forward)
|
||||
}
|
||||
} else if nested && t == nl.CTA_TUPLE_REPLY {
|
||||
if nested, t, _ = parseNfAttrTL(reader); nested && t == nl.CTA_TUPLE_IP {
|
||||
parseIpTuple(reader, &s.Reverse)
|
||||
|
||||
// Got all the useful information stop parsing
|
||||
break
|
||||
} else {
|
||||
// Header not recognized skip it
|
||||
reader.Seek(int64(l), seekCurrent)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return s
|
||||
}
|
||||
|
||||
// Conntrack parameters and options:
|
||||
// -n, --src-nat ip source NAT ip
|
||||
// -g, --dst-nat ip destination NAT ip
|
||||
// -j, --any-nat ip source or destination NAT ip
|
||||
// -m, --mark mark Set mark
|
||||
// -c, --secmark secmark Set selinux secmark
|
||||
// -e, --event-mask eventmask Event mask, eg. NEW,DESTROY
|
||||
// -z, --zero Zero counters while listing
|
||||
// -o, --output type[,...] Output format, eg. xml
|
||||
// -l, --label label[,...] conntrack labels
|
||||
|
||||
// Common parameters and options:
|
||||
// -s, --src, --orig-src ip Source address from original direction
|
||||
// -d, --dst, --orig-dst ip Destination address from original direction
|
||||
// -r, --reply-src ip Source addres from reply direction
|
||||
// -q, --reply-dst ip Destination address from reply direction
|
||||
// -p, --protonum proto Layer 4 Protocol, eg. 'tcp'
|
||||
// -f, --family proto Layer 3 Protocol, eg. 'ipv6'
|
||||
// -t, --timeout timeout Set timeout
|
||||
// -u, --status status Set status, eg. ASSURED
|
||||
// -w, --zone value Set conntrack zone
|
||||
// --orig-zone value Set zone for original direction
|
||||
// --reply-zone value Set zone for reply direction
|
||||
// -b, --buffer-size Netlink socket buffer size
|
||||
// --mask-src ip Source mask address
|
||||
// --mask-dst ip Destination mask address
|
||||
|
||||
// Filter types
|
||||
type ConntrackFilterType uint8
|
||||
|
||||
const (
|
||||
ConntrackOrigSrcIP = iota // -orig-src ip Source address from original direction
|
||||
ConntrackOrigDstIP // -orig-dst ip Destination address from original direction
|
||||
ConntrackNatSrcIP // -src-nat ip Source NAT ip
|
||||
ConntrackNatDstIP // -dst-nat ip Destination NAT ip
|
||||
ConntrackNatAnyIP // -any-nat ip Source or destination NAT ip
|
||||
)
|
||||
|
||||
type ConntrackFilter struct {
|
||||
ipFilter map[ConntrackFilterType]net.IP
|
||||
}
|
||||
|
||||
// AddIP adds an IP to the conntrack filter
|
||||
func (f *ConntrackFilter) AddIP(tp ConntrackFilterType, ip net.IP) error {
|
||||
if f.ipFilter == nil {
|
||||
f.ipFilter = make(map[ConntrackFilterType]net.IP)
|
||||
}
|
||||
if _, ok := f.ipFilter[tp]; ok {
|
||||
return errors.New("Filter attribute already present")
|
||||
}
|
||||
f.ipFilter[tp] = ip
|
||||
return nil
|
||||
}
|
||||
|
||||
// MatchConntrackFlow applies the filter to the flow and returns true if the flow matches the filter
|
||||
// false otherwise
|
||||
func (f *ConntrackFilter) MatchConntrackFlow(flow *ConntrackFlow) bool {
|
||||
if len(f.ipFilter) == 0 {
|
||||
// empty filter always not match
|
||||
return false
|
||||
}
|
||||
|
||||
match := true
|
||||
// -orig-src ip Source address from original direction
|
||||
if elem, found := f.ipFilter[ConntrackOrigSrcIP]; found {
|
||||
match = match && elem.Equal(flow.Forward.SrcIP)
|
||||
}
|
||||
|
||||
// -orig-dst ip Destination address from original direction
|
||||
if elem, found := f.ipFilter[ConntrackOrigDstIP]; match && found {
|
||||
match = match && elem.Equal(flow.Forward.DstIP)
|
||||
}
|
||||
|
||||
// -src-nat ip Source NAT ip
|
||||
if elem, found := f.ipFilter[ConntrackNatSrcIP]; match && found {
|
||||
match = match && elem.Equal(flow.Reverse.SrcIP)
|
||||
}
|
||||
|
||||
// -dst-nat ip Destination NAT ip
|
||||
if elem, found := f.ipFilter[ConntrackNatDstIP]; match && found {
|
||||
match = match && elem.Equal(flow.Reverse.DstIP)
|
||||
}
|
||||
|
||||
// -any-nat ip Source or destination NAT ip
|
||||
if elem, found := f.ipFilter[ConntrackNatAnyIP]; match && found {
|
||||
match = match && (elem.Equal(flow.Reverse.SrcIP) || elem.Equal(flow.Reverse.DstIP))
|
||||
}
|
||||
|
||||
return match
|
||||
}
|
53
vendor/github.com/vishvananda/netlink/conntrack_unspecified.go
generated
vendored
Normal file
53
vendor/github.com/vishvananda/netlink/conntrack_unspecified.go
generated
vendored
Normal file
|
@ -0,0 +1,53 @@
|
|||
// +build !linux
|
||||
|
||||
package netlink
|
||||
|
||||
// ConntrackTableType Conntrack table for the netlink operation
|
||||
type ConntrackTableType uint8
|
||||
|
||||
// InetFamily Family type
|
||||
type InetFamily uint8
|
||||
|
||||
// ConntrackFlow placeholder
|
||||
type ConntrackFlow struct{}
|
||||
|
||||
// ConntrackFilter placeholder
|
||||
type ConntrackFilter struct{}
|
||||
|
||||
// ConntrackTableList returns the flow list of a table of a specific family
|
||||
// conntrack -L [table] [options] List conntrack or expectation table
|
||||
func ConntrackTableList(table ConntrackTableType, family InetFamily) ([]*ConntrackFlow, error) {
|
||||
return nil, ErrNotImplemented
|
||||
}
|
||||
|
||||
// ConntrackTableFlush flushes all the flows of a specified table
|
||||
// conntrack -F [table] Flush table
|
||||
// The flush operation applies to all the family types
|
||||
func ConntrackTableFlush(table ConntrackTableType) error {
|
||||
return ErrNotImplemented
|
||||
}
|
||||
|
||||
// ConntrackDeleteFilter deletes entries on the specified table on the base of the filter
|
||||
// conntrack -D [table] parameters Delete conntrack or expectation
|
||||
func ConntrackDeleteFilter(table ConntrackTableType, family InetFamily, filter *ConntrackFilter) (uint, error) {
|
||||
return 0, ErrNotImplemented
|
||||
}
|
||||
|
||||
// ConntrackTableList returns the flow list of a table of a specific family using the netlink handle passed
|
||||
// conntrack -L [table] [options] List conntrack or expectation table
|
||||
func (h *Handle) ConntrackTableList(table ConntrackTableType, family InetFamily) ([]*ConntrackFlow, error) {
|
||||
return nil, ErrNotImplemented
|
||||
}
|
||||
|
||||
// ConntrackTableFlush flushes all the flows of a specified table using the netlink handle passed
|
||||
// conntrack -F [table] Flush table
|
||||
// The flush operation applies to all the family types
|
||||
func (h *Handle) ConntrackTableFlush(table ConntrackTableType) error {
|
||||
return ErrNotImplemented
|
||||
}
|
||||
|
||||
// ConntrackDeleteFilter deletes entries on the specified table on the base of the filter using the netlink handle passed
|
||||
// conntrack -D [table] parameters Delete conntrack or expectation
|
||||
func (h *Handle) ConntrackDeleteFilter(table ConntrackTableType, family InetFamily, filter *ConntrackFilter) (uint, error) {
|
||||
return 0, ErrNotImplemented
|
||||
}
|
41
vendor/github.com/vishvananda/netlink/filter.go
generated
vendored
41
vendor/github.com/vishvananda/netlink/filter.go
generated
vendored
|
@ -1,6 +1,10 @@
|
|||
package netlink
|
||||
|
||||
import "fmt"
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/vishvananda/netlink/nl"
|
||||
)
|
||||
|
||||
type Filter interface {
|
||||
Attrs() *FilterAttrs
|
||||
|
@ -180,11 +184,46 @@ func NewMirredAction(redirIndex int) *MirredAction {
|
|||
}
|
||||
}
|
||||
|
||||
// Constants used in TcU32Sel.Flags.
|
||||
const (
|
||||
TC_U32_TERMINAL = nl.TC_U32_TERMINAL
|
||||
TC_U32_OFFSET = nl.TC_U32_OFFSET
|
||||
TC_U32_VAROFFSET = nl.TC_U32_VAROFFSET
|
||||
TC_U32_EAT = nl.TC_U32_EAT
|
||||
)
|
||||
|
||||
// Sel of the U32 filters that contains multiple TcU32Key. This is the copy
|
||||
// and the frontend representation of nl.TcU32Sel. It is serialized into canonical
|
||||
// nl.TcU32Sel with the appropriate endianness.
|
||||
type TcU32Sel struct {
|
||||
Flags uint8
|
||||
Offshift uint8
|
||||
Nkeys uint8
|
||||
Pad uint8
|
||||
Offmask uint16
|
||||
Off uint16
|
||||
Offoff int16
|
||||
Hoff int16
|
||||
Hmask uint32
|
||||
Keys []TcU32Key
|
||||
}
|
||||
|
||||
// TcU32Key contained of Sel in the U32 filters. This is the copy and the frontend
|
||||
// representation of nl.TcU32Key. It is serialized into chanonical nl.TcU32Sel
|
||||
// with the appropriate endianness.
|
||||
type TcU32Key struct {
|
||||
Mask uint32
|
||||
Val uint32
|
||||
Off int32
|
||||
OffMask int32
|
||||
}
|
||||
|
||||
// U32 filters on many packet related properties
|
||||
type U32 struct {
|
||||
FilterAttrs
|
||||
ClassId uint32
|
||||
RedirIndex int
|
||||
Sel *TcU32Sel
|
||||
Actions []Action
|
||||
}
|
||||
|
||||
|
|
45
vendor/github.com/vishvananda/netlink/filter_linux.go
generated
vendored
45
vendor/github.com/vishvananda/netlink/filter_linux.go
generated
vendored
|
@ -6,6 +6,7 @@ import (
|
|||
"errors"
|
||||
"fmt"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
|
||||
"github.com/vishvananda/netlink/nl"
|
||||
)
|
||||
|
@ -128,12 +129,34 @@ func (h *Handle) FilterAdd(filter Filter) error {
|
|||
|
||||
options := nl.NewRtAttr(nl.TCA_OPTIONS, nil)
|
||||
if u32, ok := filter.(*U32); ok {
|
||||
// match all
|
||||
sel := nl.TcU32Sel{
|
||||
Nkeys: 1,
|
||||
Flags: nl.TC_U32_TERMINAL,
|
||||
// Convert TcU32Sel into nl.TcU32Sel as it is without copy.
|
||||
sel := (*nl.TcU32Sel)(unsafe.Pointer(u32.Sel))
|
||||
if sel == nil {
|
||||
// match all
|
||||
sel = &nl.TcU32Sel{
|
||||
Nkeys: 1,
|
||||
Flags: nl.TC_U32_TERMINAL,
|
||||
}
|
||||
sel.Keys = append(sel.Keys, nl.TcU32Key{})
|
||||
}
|
||||
sel.Keys = append(sel.Keys, nl.TcU32Key{})
|
||||
|
||||
if native != networkOrder {
|
||||
// Copy Tcu32Sel.
|
||||
cSel := sel
|
||||
keys := make([]nl.TcU32Key, cap(sel.Keys))
|
||||
copy(keys, sel.Keys)
|
||||
cSel.Keys = keys
|
||||
sel = cSel
|
||||
|
||||
// Handle the endianness of attributes
|
||||
sel.Offmask = native.Uint16(htons(sel.Offmask))
|
||||
sel.Hmask = native.Uint32(htonl(sel.Hmask))
|
||||
for _, key := range sel.Keys {
|
||||
key.Mask = native.Uint32(htonl(key.Mask))
|
||||
key.Val = native.Uint32(htonl(key.Val))
|
||||
}
|
||||
}
|
||||
sel.Nkeys = uint8(len(sel.Keys))
|
||||
nl.NewRtAttrChild(options, nl.TCA_U32_SEL, sel.Serialize())
|
||||
if u32.ClassId != 0 {
|
||||
nl.NewRtAttrChild(options, nl.TCA_U32_CLASSID, nl.Uint32Attr(u32.ClassId))
|
||||
|
@ -425,6 +448,16 @@ func parseU32Data(filter Filter, data []syscall.NetlinkRouteAttr) (bool, error)
|
|||
case nl.TCA_U32_SEL:
|
||||
detailed = true
|
||||
sel := nl.DeserializeTcU32Sel(datum.Value)
|
||||
u32.Sel = (*TcU32Sel)(unsafe.Pointer(sel))
|
||||
if native != networkOrder {
|
||||
// Handle the endianness of attributes
|
||||
u32.Sel.Offmask = native.Uint16(htons(sel.Offmask))
|
||||
u32.Sel.Hmask = native.Uint32(htonl(sel.Hmask))
|
||||
for _, key := range u32.Sel.Keys {
|
||||
key.Mask = native.Uint32(htonl(key.Mask))
|
||||
key.Val = native.Uint32(htonl(key.Val))
|
||||
}
|
||||
}
|
||||
// only parse if we have a very basic redirect
|
||||
if sel.Flags&nl.TC_U32_TERMINAL == 0 || sel.Nkeys != 1 {
|
||||
return detailed, nil
|
||||
|
@ -443,6 +476,8 @@ func parseU32Data(filter Filter, data []syscall.NetlinkRouteAttr) (bool, error)
|
|||
u32.RedirIndex = int(action.Ifindex)
|
||||
}
|
||||
}
|
||||
case nl.TCA_U32_CLASSID:
|
||||
u32.ClassId = native.Uint32(datum.Value)
|
||||
}
|
||||
}
|
||||
return detailed, nil
|
||||
|
|
189
vendor/github.com/vishvananda/netlink/nl/conntrack_linux.go
generated
vendored
Normal file
189
vendor/github.com/vishvananda/netlink/nl/conntrack_linux.go
generated
vendored
Normal file
|
@ -0,0 +1,189 @@
|
|||
package nl
|
||||
|
||||
import "unsafe"
|
||||
|
||||
// Track the message sizes for the correct serialization/deserialization
|
||||
const (
|
||||
SizeofNfgenmsg = 4
|
||||
SizeofNfattr = 4
|
||||
SizeofNfConntrack = 376
|
||||
SizeofNfctTupleHead = 52
|
||||
)
|
||||
|
||||
var L4ProtoMap = map[uint8]string{
|
||||
6: "tcp",
|
||||
17: "udp",
|
||||
}
|
||||
|
||||
// All the following constants are coming from:
|
||||
// https://github.com/torvalds/linux/blob/master/include/uapi/linux/netfilter/nfnetlink_conntrack.h
|
||||
|
||||
// enum cntl_msg_types {
|
||||
// IPCTNL_MSG_CT_NEW,
|
||||
// IPCTNL_MSG_CT_GET,
|
||||
// IPCTNL_MSG_CT_DELETE,
|
||||
// IPCTNL_MSG_CT_GET_CTRZERO,
|
||||
// IPCTNL_MSG_CT_GET_STATS_CPU,
|
||||
// IPCTNL_MSG_CT_GET_STATS,
|
||||
// IPCTNL_MSG_CT_GET_DYING,
|
||||
// IPCTNL_MSG_CT_GET_UNCONFIRMED,
|
||||
//
|
||||
// IPCTNL_MSG_MAX
|
||||
// };
|
||||
const (
|
||||
IPCTNL_MSG_CT_GET = 1
|
||||
IPCTNL_MSG_CT_DELETE = 2
|
||||
)
|
||||
|
||||
// #define NFNETLINK_V0 0
|
||||
const (
|
||||
NFNETLINK_V0 = 0
|
||||
)
|
||||
|
||||
// #define NLA_F_NESTED (1 << 15)
|
||||
const (
|
||||
NLA_F_NESTED = (1 << 15)
|
||||
)
|
||||
|
||||
// enum ctattr_type {
|
||||
// CTA_UNSPEC,
|
||||
// CTA_TUPLE_ORIG,
|
||||
// CTA_TUPLE_REPLY,
|
||||
// CTA_STATUS,
|
||||
// CTA_PROTOINFO,
|
||||
// CTA_HELP,
|
||||
// CTA_NAT_SRC,
|
||||
// #define CTA_NAT CTA_NAT_SRC /* backwards compatibility */
|
||||
// CTA_TIMEOUT,
|
||||
// CTA_MARK,
|
||||
// CTA_COUNTERS_ORIG,
|
||||
// CTA_COUNTERS_REPLY,
|
||||
// CTA_USE,
|
||||
// CTA_ID,
|
||||
// CTA_NAT_DST,
|
||||
// CTA_TUPLE_MASTER,
|
||||
// CTA_SEQ_ADJ_ORIG,
|
||||
// CTA_NAT_SEQ_ADJ_ORIG = CTA_SEQ_ADJ_ORIG,
|
||||
// CTA_SEQ_ADJ_REPLY,
|
||||
// CTA_NAT_SEQ_ADJ_REPLY = CTA_SEQ_ADJ_REPLY,
|
||||
// CTA_SECMARK, /* obsolete */
|
||||
// CTA_ZONE,
|
||||
// CTA_SECCTX,
|
||||
// CTA_TIMESTAMP,
|
||||
// CTA_MARK_MASK,
|
||||
// CTA_LABELS,
|
||||
// CTA_LABELS_MASK,
|
||||
// __CTA_MAX
|
||||
// };
|
||||
const (
|
||||
CTA_TUPLE_ORIG = 1
|
||||
CTA_TUPLE_REPLY = 2
|
||||
CTA_STATUS = 3
|
||||
CTA_TIMEOUT = 8
|
||||
CTA_MARK = 9
|
||||
CTA_PROTOINFO = 4
|
||||
)
|
||||
|
||||
// enum ctattr_tuple {
|
||||
// CTA_TUPLE_UNSPEC,
|
||||
// CTA_TUPLE_IP,
|
||||
// CTA_TUPLE_PROTO,
|
||||
// CTA_TUPLE_ZONE,
|
||||
// __CTA_TUPLE_MAX
|
||||
// };
|
||||
// #define CTA_TUPLE_MAX (__CTA_TUPLE_MAX - 1)
|
||||
const (
|
||||
CTA_TUPLE_IP = 1
|
||||
CTA_TUPLE_PROTO = 2
|
||||
)
|
||||
|
||||
// enum ctattr_ip {
|
||||
// CTA_IP_UNSPEC,
|
||||
// CTA_IP_V4_SRC,
|
||||
// CTA_IP_V4_DST,
|
||||
// CTA_IP_V6_SRC,
|
||||
// CTA_IP_V6_DST,
|
||||
// __CTA_IP_MAX
|
||||
// };
|
||||
// #define CTA_IP_MAX (__CTA_IP_MAX - 1)
|
||||
const (
|
||||
CTA_IP_V4_SRC = 1
|
||||
CTA_IP_V4_DST = 2
|
||||
CTA_IP_V6_SRC = 3
|
||||
CTA_IP_V6_DST = 4
|
||||
)
|
||||
|
||||
// enum ctattr_l4proto {
|
||||
// CTA_PROTO_UNSPEC,
|
||||
// CTA_PROTO_NUM,
|
||||
// CTA_PROTO_SRC_PORT,
|
||||
// CTA_PROTO_DST_PORT,
|
||||
// CTA_PROTO_ICMP_ID,
|
||||
// CTA_PROTO_ICMP_TYPE,
|
||||
// CTA_PROTO_ICMP_CODE,
|
||||
// CTA_PROTO_ICMPV6_ID,
|
||||
// CTA_PROTO_ICMPV6_TYPE,
|
||||
// CTA_PROTO_ICMPV6_CODE,
|
||||
// __CTA_PROTO_MAX
|
||||
// };
|
||||
// #define CTA_PROTO_MAX (__CTA_PROTO_MAX - 1)
|
||||
const (
|
||||
CTA_PROTO_NUM = 1
|
||||
CTA_PROTO_SRC_PORT = 2
|
||||
CTA_PROTO_DST_PORT = 3
|
||||
)
|
||||
|
||||
// enum ctattr_protoinfo {
|
||||
// CTA_PROTOINFO_UNSPEC,
|
||||
// CTA_PROTOINFO_TCP,
|
||||
// CTA_PROTOINFO_DCCP,
|
||||
// CTA_PROTOINFO_SCTP,
|
||||
// __CTA_PROTOINFO_MAX
|
||||
// };
|
||||
// #define CTA_PROTOINFO_MAX (__CTA_PROTOINFO_MAX - 1)
|
||||
const (
|
||||
CTA_PROTOINFO_TCP = 1
|
||||
)
|
||||
|
||||
// enum ctattr_protoinfo_tcp {
|
||||
// CTA_PROTOINFO_TCP_UNSPEC,
|
||||
// CTA_PROTOINFO_TCP_STATE,
|
||||
// CTA_PROTOINFO_TCP_WSCALE_ORIGINAL,
|
||||
// CTA_PROTOINFO_TCP_WSCALE_REPLY,
|
||||
// CTA_PROTOINFO_TCP_FLAGS_ORIGINAL,
|
||||
// CTA_PROTOINFO_TCP_FLAGS_REPLY,
|
||||
// __CTA_PROTOINFO_TCP_MAX
|
||||
// };
|
||||
// #define CTA_PROTOINFO_TCP_MAX (__CTA_PROTOINFO_TCP_MAX - 1)
|
||||
const (
|
||||
CTA_PROTOINFO_TCP_STATE = 1
|
||||
CTA_PROTOINFO_TCP_WSCALE_ORIGINAL = 2
|
||||
CTA_PROTOINFO_TCP_WSCALE_REPLY = 3
|
||||
CTA_PROTOINFO_TCP_FLAGS_ORIGINAL = 4
|
||||
CTA_PROTOINFO_TCP_FLAGS_REPLY = 5
|
||||
)
|
||||
|
||||
// /* General form of address family dependent message.
|
||||
// */
|
||||
// struct nfgenmsg {
|
||||
// __u8 nfgen_family; /* AF_xxx */
|
||||
// __u8 version; /* nfnetlink version */
|
||||
// __be16 res_id; /* resource id */
|
||||
// };
|
||||
type Nfgenmsg struct {
|
||||
NfgenFamily uint8
|
||||
Version uint8
|
||||
ResId uint16 // big endian
|
||||
}
|
||||
|
||||
func (msg *Nfgenmsg) Len() int {
|
||||
return SizeofNfgenmsg
|
||||
}
|
||||
|
||||
func DeserializeNfgenmsg(b []byte) *Nfgenmsg {
|
||||
return (*Nfgenmsg)(unsafe.Pointer(&b[0:SizeofNfgenmsg][0]))
|
||||
}
|
||||
|
||||
func (msg *Nfgenmsg) Serialize() []byte {
|
||||
return (*(*[SizeofNfgenmsg]byte)(unsafe.Pointer(msg)))[:]
|
||||
}
|
16
vendor/github.com/vishvananda/netlink/nl/nl_linux.go
generated
vendored
16
vendor/github.com/vishvananda/netlink/nl/nl_linux.go
generated
vendored
|
@ -24,7 +24,7 @@ const (
|
|||
)
|
||||
|
||||
// SupportedNlFamilies contains the list of netlink families this netlink package supports
|
||||
var SupportedNlFamilies = []int{syscall.NETLINK_ROUTE, syscall.NETLINK_XFRM}
|
||||
var SupportedNlFamilies = []int{syscall.NETLINK_ROUTE, syscall.NETLINK_XFRM, syscall.NETLINK_NETFILTER}
|
||||
|
||||
var nextSeqNr uint32
|
||||
|
||||
|
@ -321,6 +321,7 @@ func (a *RtAttr) Serialize() []byte {
|
|||
type NetlinkRequest struct {
|
||||
syscall.NlMsghdr
|
||||
Data []NetlinkRequestData
|
||||
RawData []byte
|
||||
Sockets map[int]*SocketHandle
|
||||
}
|
||||
|
||||
|
@ -332,6 +333,8 @@ func (req *NetlinkRequest) Serialize() []byte {
|
|||
dataBytes[i] = data.Serialize()
|
||||
length = length + len(dataBytes[i])
|
||||
}
|
||||
length += len(req.RawData)
|
||||
|
||||
req.Len = uint32(length)
|
||||
b := make([]byte, length)
|
||||
hdr := (*(*[syscall.SizeofNlMsghdr]byte)(unsafe.Pointer(req)))[:]
|
||||
|
@ -343,6 +346,10 @@ func (req *NetlinkRequest) Serialize() []byte {
|
|||
next = next + 1
|
||||
}
|
||||
}
|
||||
// Add the raw data if any
|
||||
if len(req.RawData) > 0 {
|
||||
copy(b[next:length], req.RawData)
|
||||
}
|
||||
return b
|
||||
}
|
||||
|
||||
|
@ -352,6 +359,13 @@ func (req *NetlinkRequest) AddData(data NetlinkRequestData) {
|
|||
}
|
||||
}
|
||||
|
||||
// AddRawData adds raw bytes to the end of the NetlinkRequest object during serialization
|
||||
func (req *NetlinkRequest) AddRawData(data []byte) {
|
||||
if data != nil {
|
||||
req.RawData = append(req.RawData, data...)
|
||||
}
|
||||
}
|
||||
|
||||
// Execute the request against a the given sockType.
|
||||
// Returns a list of netlink messages in serialized format, optionally filtered
|
||||
// by resType.
|
||||
|
|
Loading…
Reference in a new issue