Add LOCKDOWN_E_INVALID_SERVICE error and functionality

This error is returned if the service does not exist on the device.
It comes handy to detect if for instance the AFC2 service is actually
setup on a device or not.

1 files changed, 11 insertions, 2 deletions

diff --git a/src/lockdown.c b/src/lockdown.c
index 1befb72..8f15b3f 100644
--- a/src/lockdown.c
+++ b/src/lockdown.c
@@ -1262,9 +1262,18 @@ lockdownd_error_t lockdownd_start_service(lockdownd_client_t client, const char
                         if (port && ret == LOCKDOWN_E_SUCCESS)
                                 *port = port_loc;
                 }
-        }
-        else
+        } else {
                 ret = LOCKDOWN_E_START_SERVICE_FAILED;
+                plist_t error_node = plist_dict_get_item(dict, "Error");
+                if (error_node && PLIST_STRING == plist_get_node_type(error_node)) {
+                        char *error = NULL;
+                        plist_get_string_val(error_node, &error);
+                        if (!strcmp(error, "InvalidService")) {
+                                ret = LOCKDOWN_E_INVALID_SERVICE;
+                        }
+                        free(error);
+                }
+        }
 
         plist_free(dict);
         dict = NULL;