forked from hswaw/hscloud
278 lines
7.4 KiB
Go
278 lines
7.4 KiB
Go
package main
|
|
|
|
import (
|
|
"context"
|
|
"flag"
|
|
"fmt"
|
|
"reflect"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"code.hackerspace.pl/hscloud/go/mirko"
|
|
"github.com/golang/glog"
|
|
"github.com/ziutek/telnet"
|
|
"google.golang.org/grpc/codes"
|
|
"google.golang.org/grpc/status"
|
|
|
|
pb "code.hackerspace.pl/hscloud/dc/m6220-proxy/proto"
|
|
dpb "code.hackerspace.pl/hscloud/dc/proto"
|
|
)
|
|
|
|
var (
|
|
flagSwitchAddress string
|
|
flagSwitchUsername string
|
|
flagSwitchPassword string
|
|
)
|
|
|
|
func init() {
|
|
flag.Set("logtostderr", "true")
|
|
}
|
|
|
|
type service struct {
|
|
connectionSemaphore chan int
|
|
}
|
|
|
|
func (s *service) connect() (*cliClient, error) {
|
|
s.connectionSemaphore <- 1
|
|
conn, err := telnet.Dial("tcp", flagSwitchAddress)
|
|
if err != nil {
|
|
<-s.connectionSemaphore
|
|
return nil, err
|
|
}
|
|
|
|
cli := newCliClient(conn, flagSwitchUsername, flagSwitchPassword)
|
|
return cli, nil
|
|
}
|
|
|
|
func (s *service) disconnect() {
|
|
<-s.connectionSemaphore
|
|
}
|
|
|
|
func (s *service) RunCommand(ctx context.Context, req *pb.RunCommandRequest) (*pb.RunCommandResponse, error) {
|
|
if req.Command == "" {
|
|
return nil, status.Error(codes.InvalidArgument, "command cannot be null")
|
|
}
|
|
|
|
cli, err := s.connect()
|
|
if err != nil {
|
|
return nil, status.Error(codes.Unavailable, "could not connect to switch")
|
|
}
|
|
defer s.disconnect()
|
|
|
|
lines, effective, err := cli.runCommand(ctx, req.Command)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
res := &pb.RunCommandResponse{
|
|
EffectiveCommand: effective,
|
|
Lines: lines,
|
|
}
|
|
return res, nil
|
|
}
|
|
|
|
func (s *service) parseInterfaceStatus(res *dpb.GetPortsResponse, lines []string) error {
|
|
if len(lines) < 4 {
|
|
return fmt.Errorf("need at least 4 lines of output, got %d", len(lines))
|
|
}
|
|
if lines[0] != "" {
|
|
return fmt.Errorf("expected first line to be empty, is %q", lines[0])
|
|
}
|
|
header1parts := strings.Fields(lines[1])
|
|
if want := []string{"Port", "Description", "Duplex", "Speed", "Neg", "Link", "Flow", "Control"}; !reflect.DeepEqual(want, header1parts) {
|
|
return fmt.Errorf("expected header1 to be %v, got %v", want, header1parts)
|
|
}
|
|
|
|
header2parts := strings.Fields(lines[2])
|
|
if want := []string{"State", "Status"}; !reflect.DeepEqual(want, header2parts) {
|
|
return fmt.Errorf("expected header2 to be %v, got %v", want, header2parts)
|
|
}
|
|
|
|
if lines[3][0] != '-' {
|
|
return fmt.Errorf("expected header3 to start with -, got %q", lines[3])
|
|
}
|
|
|
|
for _, line := range lines[4:] {
|
|
parts := strings.Fields(line)
|
|
if len(parts) < 6 {
|
|
break
|
|
}
|
|
portName := parts[0]
|
|
if strings.HasPrefix(portName, "Gi") && strings.HasPrefix(portName, "Ti") {
|
|
break
|
|
}
|
|
|
|
speedStr := parts[len(parts)-4]
|
|
stateStr := parts[len(parts)-2]
|
|
|
|
port := &dpb.SwitchPort{
|
|
Name: portName,
|
|
}
|
|
if speedStr == "100" {
|
|
port.Speed = dpb.SwitchPort_SPEED_100M
|
|
} else if speedStr == "1000" {
|
|
port.Speed = dpb.SwitchPort_SPEED_1G
|
|
} else if speedStr == "10000" {
|
|
port.Speed = dpb.SwitchPort_SPEED_10G
|
|
}
|
|
if stateStr == "Up" {
|
|
port.LinkState = dpb.SwitchPort_LINKSTATE_UP
|
|
} else if stateStr == "Down" {
|
|
port.LinkState = dpb.SwitchPort_LINKSTATE_DOWN
|
|
}
|
|
|
|
res.Ports = append(res.Ports, port)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *service) parseInterfaceConfig(port *dpb.SwitchPort, lines []string) error {
|
|
glog.Infof("%+v", port)
|
|
for _, line := range lines {
|
|
glog.Infof("%s: %q", port.Name, line)
|
|
parts := strings.Fields(line)
|
|
if len(parts) < 1 {
|
|
continue
|
|
}
|
|
|
|
if len(parts) >= 2 && parts[0] == "switchport" {
|
|
if parts[1] == "mode" {
|
|
if port.PortMode != dpb.SwitchPort_PORTMODE_INVALID {
|
|
return fmt.Errorf("redefinition of switchport mode")
|
|
}
|
|
if parts[2] == "access" {
|
|
port.PortMode = dpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED
|
|
} else if parts[2] == "trunk" {
|
|
port.PortMode = dpb.SwitchPort_PORTMODE_SWITCHPORT_TAGGED
|
|
} else if parts[2] == "general" {
|
|
port.PortMode = dpb.SwitchPort_PORTMODE_SWITCHPORT_GENERIC
|
|
} else {
|
|
port.PortMode = dpb.SwitchPort_PORTMODE_MANGLED
|
|
}
|
|
}
|
|
|
|
if parts[1] == "access" {
|
|
if port.PortMode == dpb.SwitchPort_PORTMODE_INVALID {
|
|
port.PortMode = dpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED
|
|
}
|
|
if len(parts) > 3 && parts[2] == "vlan" {
|
|
vlan, err := strconv.Atoi(parts[3])
|
|
if err != nil {
|
|
return fmt.Errorf("invalid vlan: %q", parts[3])
|
|
}
|
|
port.VlanNative = int32(vlan)
|
|
}
|
|
}
|
|
|
|
if parts[1] == "trunk" {
|
|
if len(parts) >= 5 && parts[2] == "allowed" && parts[3] == "vlan" {
|
|
vlans := strings.Split(parts[4], ",")
|
|
for _, vlan := range vlans {
|
|
vlanNum, err := strconv.Atoi(vlan)
|
|
if err != nil {
|
|
return fmt.Errorf("invalid vlan: %q", parts[3])
|
|
}
|
|
port.VlanTagged = append(port.VlanTagged, int32(vlanNum))
|
|
}
|
|
}
|
|
}
|
|
} else if len(parts) >= 2 && parts[0] == "mtu" {
|
|
mtu, err := strconv.Atoi(parts[1])
|
|
if err != nil {
|
|
return fmt.Errorf("invalid mtu: %q", parts[3])
|
|
}
|
|
port.Mtu = int32(mtu)
|
|
} else if len(parts) >= 2 && parts[0] == "spanning-tree" && parts[1] == "portfast" {
|
|
port.SpanningTreeMode = dpb.SwitchPort_SPANNING_TREE_MODE_PORTFAST
|
|
}
|
|
}
|
|
|
|
// no mode -> access
|
|
if port.PortMode == dpb.SwitchPort_PORTMODE_INVALID {
|
|
port.PortMode = dpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED
|
|
}
|
|
|
|
// apply defaults
|
|
if port.Mtu == 0 {
|
|
port.Mtu = 1500
|
|
}
|
|
if port.SpanningTreeMode == dpb.SwitchPort_SPANNING_TREE_MODE_INVALID {
|
|
port.SpanningTreeMode = dpb.SwitchPort_SPANNING_TREE_MODE_AUTO_PORTFAST
|
|
}
|
|
|
|
// sanitize
|
|
if port.PortMode == dpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED {
|
|
port.VlanTagged = []int32{}
|
|
port.Prefixes = []string{}
|
|
if port.VlanNative == 0 {
|
|
port.VlanNative = 1
|
|
}
|
|
} else if port.PortMode == dpb.SwitchPort_PORTMODE_SWITCHPORT_TAGGED {
|
|
port.VlanNative = 0
|
|
port.Prefixes = []string{}
|
|
} else if port.PortMode == dpb.SwitchPort_PORTMODE_SWITCHPORT_GENERIC {
|
|
port.Prefixes = []string{}
|
|
if port.VlanNative == 0 {
|
|
port.VlanNative = 1
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *service) GetPorts(ctx context.Context, req *dpb.GetPortsRequest) (*dpb.GetPortsResponse, error) {
|
|
cli, err := s.connect()
|
|
if err != nil {
|
|
return nil, status.Error(codes.Unavailable, "could not connect to switch")
|
|
}
|
|
defer s.disconnect()
|
|
res := &dpb.GetPortsResponse{}
|
|
|
|
statusLines, _, err := cli.runCommand(ctx, "show interface status")
|
|
if err != nil {
|
|
return nil, status.Error(codes.Unavailable, "could not get interface status from switch")
|
|
}
|
|
|
|
err = s.parseInterfaceStatus(res, statusLines)
|
|
if err != nil {
|
|
return nil, status.Errorf(codes.Unavailable, "could not parse interface status from switch: %v", err)
|
|
}
|
|
|
|
for _, port := range res.Ports {
|
|
configLines, _, err := cli.runCommand(ctx, "show run interface "+port.Name)
|
|
if err != nil {
|
|
return nil, status.Error(codes.Unavailable, "could not get interface config from switch")
|
|
}
|
|
err = s.parseInterfaceConfig(port, configLines)
|
|
if err != nil {
|
|
return nil, status.Errorf(codes.Unavailable, "could not parse interface config from switch: %v", err)
|
|
}
|
|
}
|
|
|
|
return res, nil
|
|
}
|
|
|
|
func main() {
|
|
flag.StringVar(&flagSwitchAddress, "switch_address", "127.0.0.1:23", "Telnet address of M6220")
|
|
flag.StringVar(&flagSwitchUsername, "switch_username", "admin", "Switch login username")
|
|
flag.StringVar(&flagSwitchPassword, "switch_password", "admin", "Switch login password")
|
|
flag.Parse()
|
|
|
|
s := &service{
|
|
connectionSemaphore: make(chan int, 1),
|
|
}
|
|
|
|
m := mirko.New()
|
|
if err := m.Listen(); err != nil {
|
|
glog.Exitf("Listen(): %v", err)
|
|
}
|
|
|
|
pb.RegisterM6220ProxyServer(m.GRPC(), s)
|
|
dpb.RegisterSwitchControlServer(m.GRPC(), s)
|
|
|
|
if err := m.Serve(); err != nil {
|
|
glog.Exitf("Serve(): %v", err)
|
|
}
|
|
|
|
select {}
|
|
}
|