container_discovery/internal/discoverer/ipv4/service.go

package ipv4

import (
	"fmt"

	cuej "git.loafle.net/commons/util-go/encoding/json"
	occu "git.loafle.net/overflow/commons-go/core/util"
	ocmd "git.loafle.net/overflow/commons-go/model/discovery"
	ocmm "git.loafle.net/overflow/commons-go/model/meta"
	"github.com/google/gopacket/layers"
)

func ScanService(port *ocmd.Port, ds *ocmd.DiscoverService, resultChan chan interface{}, errChan chan error, stopChan chan struct{}) {
	portNumber, err := cuej.NumberToInt(port.PortNumber)
	if err != nil {
		errChan <- fmt.Errorf("Discovery: Service scan port[%s] error %v ", port.PortNumber, err)
		return
	}

	switch ocmm.ToMetaPortTypeEnum(port.MetaPortType) {
	case ocmm.MetaPortTypeEnumTCP:
		if !scanServiceTCP(port, ds, resultChan, errChan, stopChan) {
			if dName, ok := layers.TCPPortNames[layers.TCPPort(portNumber)]; ok {
				description := fmt.Sprintf("Not Supported Service. Perhaps %s[%d]", dName, portNumber)
				s := &ocmd.Service{
					Key:            ocmm.MetaTargetServiceTypeEnumUNKNOWN.String(),
					Description:    description,
					DiscoveredDate: occu.NowPtr(),
					Port:           port,
					MetaCryptoType: ocmm.ToMetaCryptoType(ocmm.MetaCryptoTypeEnumUNKNOWN),
				}
				resultChan <- s
			}
		}

	case ocmm.MetaPortTypeEnumUDP:
		if !scanServiceUDP(port, ds, resultChan, errChan, stopChan) {
			if dName, ok := layers.UDPPortNames[layers.UDPPort(portNumber)]; ok {
				description := fmt.Sprintf("Not Supported Service. Perhaps %s[%d]", dName, portNumber)
				s := &ocmd.Service{
					Key:            ocmm.MetaTargetServiceTypeEnumUNKNOWN.String(),
					Description:    description,
					DiscoveredDate: occu.NowPtr(),
					Port:           port,
					MetaCryptoType: ocmm.ToMetaCryptoType(ocmm.MetaCryptoTypeEnumUNKNOWN),
				}
				resultChan <- s
			}
		}
	}

}