Lennart Poettering
a1fdbcbe3d
I found myself often looking for a quick way to determine "the local IP address", and then being lost in the "ip addr" output to find for the right one to use. This is supposed to help a bit with that. Let's introduce a new special hostname "_outbound" with semantics similar to "_gateway" that resolves to addresses that are the closest I could come up with that maps to "the" local IP address.
36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <stdbool.h>
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#include <stdio.h>
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#include "macro.h"
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#include "strv.h"
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char* get_default_hostname(void);
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char* gethostname_malloc(void);
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char* gethostname_short_malloc(void);
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int gethostname_strict(char **ret);
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bool valid_ldh_char(char c) _const_;
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typedef enum ValidHostnameFlags {
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VALID_HOSTNAME_TRAILING_DOT = 1 << 0, /* Accept trailing dot on multi-label names */
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VALID_HOSTNAME_DOT_HOST = 1 << 1, /* Accept ".host" as valid hostname */
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} ValidHostnameFlags;
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bool hostname_is_valid(const char *s, ValidHostnameFlags flags) _pure_;
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char* hostname_cleanup(char *s);
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bool is_localhost(const char *hostname);
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static inline bool is_gateway_hostname(const char *hostname) {
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/* This tries to identify the valid syntaxes for the our synthetic "gateway" host. */
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return STRCASE_IN_SET(hostname, "_gateway", "_gateway.");
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}
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static inline bool is_outbound_hostname(const char *hostname) {
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/* This tries to identify the valid syntaxes for the our synthetic "outbound" host. */
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return STRCASE_IN_SET(hostname, "_outbound", "_outbound.");
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}
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