add scannedVia field to know the way of access such as SSH, local or pseudo (#811)

* add sacnned via

* change scannedVia type to const

scan/base.go

@@ -390,6 +390,13 @@ func (l *base) convertToModel() models.ScanResult {
 		errs = append(errs, fmt.Sprintf("%s", e))
 	}
 
+	scannedVia := scannedViaRemote
+	if isLocalExec(l.ServerInfo.Port, l.ServerInfo.Host) {
+		scannedVia = scannedViaLocal
+	} else if l.ServerInfo.Type == config.ServerTypePseudo {
+		scannedVia = scannedViaPseudo
+	}
+
 	return models.ScanResult{
 		JSONVersion:       models.JSONVersion,
 		ServerName:        l.ServerInfo.ServerName,
@@ -402,6 +409,7 @@ func (l *base) convertToModel() models.ScanResult {
 		IPv4Addrs:         l.ServerInfo.IPv4Addrs,
 		IPv6Addrs:         l.ServerInfo.IPv6Addrs,
 		ScannedCves:       l.VulnInfos,
+		ScannedVia:        scannedVia,
 		RunningKernel:     l.Kernel,
 		Packages:          l.Packages,
 		SrcPackages:       l.SrcPackages,

scan/executil.go

@@ -162,8 +162,7 @@ func exec(c conf.ServerInfo, cmd string, sudo bool, log ...*logrus.Entry) (resul
 	logger := getSSHLogger(log...)
 	logger.Debugf("Executing... %s", strings.Replace(cmd, "\n", "", -1))
 
-	if c.Port == "local" &&
-		(c.Host == "127.0.0.1" || c.Host == "localhost") {
+	if isLocalExec(c.Port, c.Host) {
 		result = localExec(c, cmd, sudo)
 	} else if conf.Conf.SSHNative {
 		result = sshExecNative(c, cmd, sudo)
@@ -175,6 +174,10 @@ func exec(c conf.ServerInfo, cmd string, sudo bool, log ...*logrus.Entry) (resul
 	return
 }
 
+func isLocalExec(port, host string) bool {
+	return port == "local" && (host == "127.0.0.1" || host == "localhost")
+}
+
 func localExec(c conf.ServerInfo, cmdstr string, sudo bool) (result execResult) {
 	cmdstr = decorateCmd(c, cmdstr, sudo)
 	var cmd *ex.Cmd

scan/serverapi.go

@@ -32,6 +32,12 @@ import (
 	"golang.org/x/xerrors"
 )
 
+const (
+	scannedViaRemote = "remote"
+	scannedViaLocal  = "local"
+	scannedViaPseudo = "pseudo"
+)
+
 var (
 	errOSFamilyHeader      = xerrors.New("X-Vuls-OS-Family header is required")
 	errOSReleaseHeader     = xerrors.New("X-Vuls-OS-Release header is required")