implement basic SwitchControl rpc
diff --git a/main.go b/main.go
index 8f26e0b..a1ea7ca 100644
--- a/main.go
+++ b/main.go
@@ -3,8 +3,12 @@
import (
"context"
"flag"
+ "fmt"
"net"
"net/http"
+ "reflect"
+ "strconv"
+ "strings"
"code.hackerspace.pl/q3k/hspki"
"github.com/golang/glog"
@@ -17,6 +21,7 @@
"google.golang.org/grpc/status"
pb "code.hackerspace.pl/q3k/m6220-proxy/proto"
+ tpb "code.hackerspace.pl/q3k/topo/proto/control"
)
var (
@@ -58,7 +63,7 @@
cli, err := s.connect()
if err != nil {
- return nil, status.Error(codes.Unavailable, "could not connect to backend")
+ return nil, status.Error(codes.Unavailable, "could not connect to switch")
}
defer s.disconnect()
@@ -73,6 +78,187 @@
return res, nil
}
+func (s *service) parseInterfaceStatus(res *tpb.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 := &tpb.SwitchPort{
+ Name: portName,
+ }
+ if speedStr == "100" {
+ port.Speed = tpb.SwitchPort_SPEED_100M
+ } else if speedStr == "1000" {
+ port.Speed = tpb.SwitchPort_SPEED_1G
+ } else if speedStr == "10000" {
+ port.Speed = tpb.SwitchPort_SPEED_10G
+ }
+ if stateStr == "Up" {
+ port.LinkState = tpb.SwitchPort_LINKSTATE_UP
+ } else if stateStr == "Down" {
+ port.LinkState = tpb.SwitchPort_LINKSTATE_DOWN
+ }
+
+ res.Ports = append(res.Ports, port)
+ }
+
+ return nil
+}
+
+func (s *service) parseInterfaceConfig(port *tpb.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 != tpb.SwitchPort_PORTMODE_INVALID {
+ return fmt.Errorf("redefinition of switchport mode")
+ }
+ if parts[2] == "access" {
+ port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED
+ } else if parts[2] == "trunk" {
+ port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_TAGGED
+ } else if parts[2] == "general" {
+ port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_GENERIC
+ } else {
+ port.PortMode = tpb.SwitchPort_PORTMODE_MANGLED
+ }
+ }
+
+ if parts[1] == "access" {
+ if port.PortMode == tpb.SwitchPort_PORTMODE_INVALID {
+ port.PortMode = tpb.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 = tpb.SwitchPort_SPANNING_TREE_MODE_PORTFAST
+ }
+ }
+
+ // no mode -> access
+ if port.PortMode == tpb.SwitchPort_PORTMODE_INVALID {
+ port.PortMode = tpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED
+ }
+
+ // apply defaults
+ if port.Mtu == 0 {
+ port.Mtu = 1500
+ }
+ if port.SpanningTreeMode == tpb.SwitchPort_SPANNING_TREE_MODE_INVALID {
+ port.SpanningTreeMode = tpb.SwitchPort_SPANNING_TREE_MODE_AUTO_PORTFAST
+ }
+
+ // sanitize
+ if port.PortMode == tpb.SwitchPort_PORTMODE_SWITCHPORT_UNTAGGED {
+ port.VlanTagged = []int32{}
+ port.Prefixes = []string{}
+ if port.VlanNative == 0 {
+ port.VlanNative = 1
+ }
+ } else if port.PortMode == tpb.SwitchPort_PORTMODE_SWITCHPORT_TAGGED {
+ port.VlanNative = 0
+ port.Prefixes = []string{}
+ } else if port.PortMode == tpb.SwitchPort_PORTMODE_SWITCHPORT_GENERIC {
+ port.Prefixes = []string{}
+ if port.VlanNative == 0 {
+ port.VlanNative = 1
+ }
+ }
+ return nil
+}
+
+func (s *service) GetPorts(ctx context.Context, req *tpb.GetPortsRequest) (*tpb.GetPortsResponse, error) {
+ cli, err := s.connect()
+ if err != nil {
+ return nil, status.Error(codes.Unavailable, "could not connect to switch")
+ }
+ defer s.disconnect()
+ res := &tpb.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(&flagListenAddress, "listen_address", "127.0.0.1:42000", "Address to listen on for gRPC")
flag.StringVar(&flagDebugAddress, "debug_address", "127.0.0.1:42001", "Address to listen on for Debug HTTP")
@@ -92,6 +278,7 @@
}
grpcSrv := grpc.NewServer(hspki.WithServerHSPKI()...)
pb.RegisterM6220ProxyServer(grpcSrv, s)
+ tpb.RegisterSwitchControlServer(grpcSrv, s)
reflection.Register(grpcSrv)
glog.Infof("Starting gRPC on %v", flagListenAddress)