authenticate_console:Stop authentication after SSH session disconnection to...

authenticate_console:Stop authentication after SSH session disconnection to avoid hanging up in poll

Signed-off-by: AsadaShino <1164429449@qq.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>

examples/authentication.c

@@ -147,7 +147,7 @@ int authenticate_console(ssh_session session)
 
     // Try to authenticate
     rc = ssh_userauth_none(session, NULL);
-    if (rc == SSH_AUTH_ERROR) {
+    if (rc == SSH_AUTH_ERROR || !ssh_is_connected(session)) {
         error(session);
         return rc;
     }
@@ -156,7 +156,7 @@ int authenticate_console(ssh_session session)
     while (rc != SSH_AUTH_SUCCESS) {
         if (method & SSH_AUTH_METHOD_GSSAPI_MIC){
             rc = ssh_userauth_gssapi(session);
-            if(rc == SSH_AUTH_ERROR) {
+            if (rc == SSH_AUTH_ERROR || !ssh_is_connected(session)) {
                 error(session);
                 return rc;
             } else if (rc == SSH_AUTH_SUCCESS) {
@@ -166,7 +166,7 @@ int authenticate_console(ssh_session session)
         // Try to authenticate with public key first
         if (method & SSH_AUTH_METHOD_PUBLICKEY) {
             rc = ssh_userauth_publickey_auto(session, NULL, NULL);
-            if (rc == SSH_AUTH_ERROR) {
+            if (rc == SSH_AUTH_ERROR || !ssh_is_connected(session)) {
                 error(session);
                 return rc;
             } else if (rc == SSH_AUTH_SUCCESS) {
@@ -206,7 +206,7 @@ int authenticate_console(ssh_session session)
         // Try to authenticate with keyboard interactive";
         if (method & SSH_AUTH_METHOD_INTERACTIVE) {
             rc = authenticate_kbdint(session, NULL);
-            if (rc == SSH_AUTH_ERROR) {
+            if (rc == SSH_AUTH_ERROR || !ssh_is_connected(session)) {
                 error(session);
                 return rc;
             } else if (rc == SSH_AUTH_SUCCESS) {
@@ -221,7 +221,7 @@ int authenticate_console(ssh_session session)
         // Try to authenticate with password
         if (method & SSH_AUTH_METHOD_PASSWORD) {
             rc = ssh_userauth_password(session, NULL, password);
-            if (rc == SSH_AUTH_ERROR) {
+            if (rc == SSH_AUTH_ERROR || !ssh_is_connected(session)) {
                 error(session);
                 return rc;
             } else if (rc == SSH_AUTH_SUCCESS) {