src/basic/hostname-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include <stdbool.h>
   5 #include <stdio.h>
   6
   7 #include "macro.h"
   8 #include "strv.h"
   9
  10 char* get_default_hostname(void);
  11 char* gethostname_malloc(void);
  12 char* gethostname_short_malloc(void);
  13 int gethostname_strict(char **ret);
  14
  15 bool valid_ldh_char(char c) _const_;
  16
  17 typedef enum ValidHostnameFlags {
  18         VALID_HOSTNAME_TRAILING_DOT = 1 << 0,   /* Accept trailing dot on multi-label names */
  19         VALID_HOSTNAME_DOT_HOST     = 1 << 1,   /* Accept ".host" as valid hostname */
  20 } ValidHostnameFlags;
  21
  22 bool hostname_is_valid(const char *s, ValidHostnameFlags flags) _pure_;
  23 char* hostname_cleanup(char *s);
  24
  25 bool is_localhost(const char *hostname);
  26
  27 static inline bool is_gateway_hostname(const char *hostname) {
  28         /* This tries to identify the valid syntaxes for the our synthetic "gateway" host. */
  29         return STRCASE_IN_SET(hostname, "_gateway", "_gateway.");
  30 }