utils: Refactor check_id out of protocol for global access

[tinc] / src / utils.c

diff --git a/src/utils.c b/src/utils.c
index 797bc3f..db7a8cd 100644 (file)
--- a/src/utils.c
+++ b/src/utils.c
@@ -181,6 +181,17 @@ unsigned int bitfield_to_int(const void *bitfield, size_t size) {
        return value;
 }
 
+bool check_id(const char *id) {
+       if(!id || !*id)
+               return false;
+
+       for(; *id; id++)
+               if(!isalnum(*id) && *id != '_')
+                       return false;
+
+       return true;
+}
+
 char *replace_name(const char *name) {
        char *ret_name;