dns-domain: add code for verifying validity of DNS-SD service names and types

[thirdparty/systemd.git] / src / resolve / dns-type.c

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2014 Zbigniew Jędrzejewski-Szmek

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include "dns-type.h"

typedef const struct {
        uint16_t type;
        const char *name;
} dns_type;

static const struct dns_type_name *
lookup_dns_type (register const char *str, register unsigned int len);

#include "dns_type-from-name.h"
#include "dns_type-to-name.h"

int dns_type_from_string(const char *s) {
        const struct dns_type_name *sc;

        assert(s);

        sc = lookup_dns_type(s, strlen(s));
        if (!sc)
                return _DNS_TYPE_INVALID;

        return sc->id;
}

/* XXX: find an authoritative list of all pseudo types? */
bool dns_type_is_pseudo(int n) {
        return IN_SET(n, DNS_TYPE_ANY, DNS_TYPE_AXFR, DNS_TYPE_IXFR, DNS_TYPE_OPT);
}