implement basic SwitchControl rpc
Serge Bazanski
parent
ff5af6936d
commit
c1515cb4a6
189
main.go
189
main.go
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@ -3,8 +3,12 @@ package main
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import (
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"context"
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"flag"
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"fmt"
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"net"
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"net/http"
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"reflect"
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"strconv"
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"strings"
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"code.hackerspace.pl/q3k/hspki"
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"github.com/golang/glog"
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@ -17,6 +21,7 @@ import (
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"google.golang.org/grpc/status"
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pb "code.hackerspace.pl/q3k/m6220-proxy/proto"
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tpb "code.hackerspace.pl/q3k/topo/proto/control"
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)
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var (
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@ -58,7 +63,7 @@ func (s *service) RunCommand(ctx context.Context, req *pb.RunCommandRequest) (*p
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cli, err := s.connect()
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if err != nil {
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return nil, status.Error(codes.Unavailable, "could not connect to backend")
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return nil, status.Error(codes.Unavailable, "could not connect to switch")
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}
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defer s.disconnect()
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@ -73,6 +78,187 @@ func (s *service) RunCommand(ctx context.Context, req *pb.RunCommandRequest) (*p
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return res, nil
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}
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func (s *service) parseInterfaceStatus(res *tpb.GetPortsResponse, lines []string) error {
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if len(lines) < 4 {
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return fmt.Errorf("need at least 4 lines of output, got %d", len(lines))
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}
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if lines[0] != "" {
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return fmt.Errorf("expected first line to be empty, is %q", lines[0])
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}
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header1parts := strings.Fields(lines[1])
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if want := []string{"Port", "Description", "Duplex", "Speed", "Neg", "Link", "Flow", "Control"}; !reflect.DeepEqual(want, header1parts) {
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return fmt.Errorf("expected header1 to be %v, got %v", want, header1parts)
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}
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header2parts := strings.Fields(lines[2])
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if want := []string{"State", "Status"}; !reflect.DeepEqual(want, header2parts) {
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return fmt.Errorf("expected header2 to be %v, got %v", want, header2parts)
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}
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if lines[3][0] != '-' {
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return fmt.Errorf("expected header3 to start with -, got %q", lines[3])
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}
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for _, line := range lines[4:] {
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parts := strings.Fields(line)
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if len(parts) < 6 {
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break
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}
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portName := parts[0]
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if strings.HasPrefix(portName, "Gi") && strings.HasPrefix(portName, "Ti") {
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break
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}
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speedStr := parts[len(parts)-4]
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stateStr := parts[len(parts)-2]
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port := &tpb.SwitchPort{
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Name: portName,
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}
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if speedStr == "100" {
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port.Speed = tpb.SwitchPort_SPEED_100M
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} else if speedStr == "1000" {
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port.Speed = tpb.SwitchPort_SPEED_1G
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} else if speedStr == "10000" {
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port.Speed = tpb.SwitchPort_SPEED_10G
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}
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if stateStr == "Up" {
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port.LinkState = tpb.SwitchPort_LINKSTATE_UP
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} else if stateStr == "Down" {
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port.LinkState = tpb.SwitchPort_LINKSTATE_DOWN
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}
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res.Ports = append(res.Ports, port)
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}
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return nil
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}
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func (s *service) parseInterfaceConfig(port *tpb.SwitchPort, lines []string) error {
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glog.Infof("%+v", port)
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for _, line := range lines {
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glog.Infof("%s: %q", port.Name, line)
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parts := strings.Fields(line)
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if len(parts) < 1 {
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continue
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}
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if len(parts) >= 2 && parts[0] == "switchport" {
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if parts[1] == "mode" {
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if port.PortMode != tpb.SwitchPort_PORTMODE_INVALID {
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return fmt.Errorf("redefinition of switchport mode")
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}
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if parts[2] == "access" {
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port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED
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} else if parts[2] == "trunk" {
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port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_TAGGED
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} else if parts[2] == "general" {
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port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_GENERIC
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} else {
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port.PortMode = tpb.SwitchPort_PORTMODE_MANGLED
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}
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}
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if parts[1] == "access" {
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if port.PortMode == tpb.SwitchPort_PORTMODE_INVALID {
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port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED
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}
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if len(parts) > 3 && parts[2] == "vlan" {
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vlan, err := strconv.Atoi(parts[3])
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if err != nil {
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return fmt.Errorf("invalid vlan: %q", parts[3])
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}
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port.VlanNative = int32(vlan)
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}
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}
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if parts[1] == "trunk" {
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if len(parts) >= 5 && parts[2] == "allowed" && parts[3] == "vlan" {
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vlans := strings.Split(parts[4], ",")
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for _, vlan := range vlans {
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vlanNum, err := strconv.Atoi(vlan)
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if err != nil {
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return fmt.Errorf("invalid vlan: %q", parts[3])
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}
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port.VlanTagged = append(port.VlanTagged, int32(vlanNum))
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}
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}
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}
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} else if len(parts) >= 2 && parts[0] == "mtu" {
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mtu, err := strconv.Atoi(parts[1])
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if err != nil {
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return fmt.Errorf("invalid mtu: %q", parts[3])
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}
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port.Mtu = int32(mtu)
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} else if len(parts) >= 2 && parts[0] == "spanning-tree" && parts[1] == "portfast" {
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port.SpanningTreeMode = tpb.SwitchPort_SPANNING_TREE_MODE_PORTFAST
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}
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}
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// no mode -> access
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if port.PortMode == tpb.SwitchPort_PORTMODE_INVALID {
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port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED
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}
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// apply defaults
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if port.Mtu == 0 {
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port.Mtu = 1500
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}
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if port.SpanningTreeMode == tpb.SwitchPort_SPANNING_TREE_MODE_INVALID {
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port.SpanningTreeMode = tpb.SwitchPort_SPANNING_TREE_MODE_AUTO_PORTFAST
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}
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// sanitize
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if port.PortMode == tpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED {
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port.VlanTagged = []int32{}
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port.Prefixes = []string{}
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if port.VlanNative == 0 {
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port.VlanNative = 1
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}
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} else if port.PortMode == tpb.SwitchPort_PORTMODE_SWITCHPORT_TAGGED {
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port.VlanNative = 0
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port.Prefixes = []string{}
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} else if port.PortMode == tpb.SwitchPort_PORTMODE_SWITCHPORT_GENERIC {
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port.Prefixes = []string{}
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if port.VlanNative == 0 {
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port.VlanNative = 1
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}
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}
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return nil
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}
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func (s *service) GetPorts(ctx context.Context, req *tpb.GetPortsRequest) (*tpb.GetPortsResponse, error) {
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cli, err := s.connect()
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if err != nil {
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return nil, status.Error(codes.Unavailable, "could not connect to switch")
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}
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defer s.disconnect()
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res := &tpb.GetPortsResponse{}
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statusLines, _, err := cli.runCommand(ctx, "show interface status")
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if err != nil {
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return nil, status.Error(codes.Unavailable, "could not get interface status from switch")
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}
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err = s.parseInterfaceStatus(res, statusLines)
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if err != nil {
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return nil, status.Errorf(codes.Unavailable, "could not parse interface status from switch: %v", err)
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}
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for _, port := range res.Ports {
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configLines, _, err := cli.runCommand(ctx, "show run interface "+port.Name)
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if err != nil {
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return nil, status.Error(codes.Unavailable, "could not get interface config from switch")
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}
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err = s.parseInterfaceConfig(port, configLines)
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if err != nil {
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return nil, status.Errorf(codes.Unavailable, "could not parse interface config from switch: %v", err)
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}
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}
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return res, nil
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}
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func main() {
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flag.StringVar(&flagListenAddress, "listen_address", "127.0.0.1:42000", "Address to listen on for gRPC")
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flag.StringVar(&flagDebugAddress, "debug_address", "127.0.0.1:42001", "Address to listen on for Debug HTTP")
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@ -92,6 +278,7 @@ func main() {
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}
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grpcSrv := grpc.NewServer(hspki.WithServerHSPKI()...)
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pb.RegisterM6220ProxyServer(grpcSrv, s)
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tpb.RegisterSwitchControlServer(grpcSrv, s)
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reflection.Register(grpcSrv)
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glog.Infof("Starting gRPC on %v", flagListenAddress)
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