97e5d693c0
This is useful for alternative network management solutions (such as NetworkManager) to push DNS configuration data into resolved. The calls will fail should networkd already have taken possesion of a link, so that the bus API is only available if we don't get the data from networkd.
62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <netinet/in.h>
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#include <stddef.h>
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#include <sys/socket.h>
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#include "macro.h"
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#include "util.h"
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union in_addr_union {
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struct in_addr in;
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struct in6_addr in6;
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};
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struct in_addr_data {
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int family;
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union in_addr_union address;
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};
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int in_addr_is_null(int family, const union in_addr_union *u);
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int in_addr_is_link_local(int family, const union in_addr_union *u);
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int in_addr_is_localhost(int family, const union in_addr_union *u);
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int in_addr_equal(int family, const union in_addr_union *a, const union in_addr_union *b);
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int in_addr_prefix_intersect(int family, const union in_addr_union *a, unsigned aprefixlen, const union in_addr_union *b, unsigned bprefixlen);
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int in_addr_prefix_next(int family, union in_addr_union *u, unsigned prefixlen);
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int in_addr_to_string(int family, const union in_addr_union *u, char **ret);
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int in_addr_from_string(int family, const char *s, union in_addr_union *ret);
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int in_addr_from_string_auto(const char *s, int *family, union in_addr_union *ret);
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unsigned char in_addr_netmask_to_prefixlen(const struct in_addr *addr);
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struct in_addr* in_addr_prefixlen_to_netmask(struct in_addr *addr, unsigned char prefixlen);
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int in_addr_default_prefixlen(const struct in_addr *addr, unsigned char *prefixlen);
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int in_addr_default_subnet_mask(const struct in_addr *addr, struct in_addr *mask);
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int in_addr_mask(int family, union in_addr_union *addr, unsigned char prefixlen);
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static inline size_t FAMILY_ADDRESS_SIZE(int family) {
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assert(family == AF_INET || family == AF_INET6);
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return family == AF_INET6 ? 16 : 4;
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}
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#define IN_ADDR_NULL ((union in_addr_union) {})
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