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git.proxmox.com Git - systemd.git/blob - src/network/networkd-address-pool.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2014 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <arpa/inet.h>
30 const union in_addr_union
*u
,
39 p
= new0(AddressPool
, 1);
45 p
->prefixlen
= prefixlen
;
48 LIST_PREPEND(address_pools
, m
->address_pools
, p
);
54 int address_pool_new_from_string(
61 union in_addr_union u
;
68 r
= in_addr_from_string(family
, p
, &u
);
72 return address_pool_new(m
, ret
, family
, &u
, prefixlen
);
75 void address_pool_free(AddressPool
*p
) {
81 LIST_REMOVE(address_pools
, p
->manager
->address_pools
, p
);
86 static bool address_pool_prefix_is_taken(
88 const union in_addr_union
*u
,
98 HASHMAP_FOREACH(l
, p
->manager
->links
, i
) {
101 /* Don't clash with assigned addresses */
102 LIST_FOREACH(addresses
, a
, l
->addresses
) {
103 if (a
->family
!= p
->family
)
106 if (in_addr_prefix_intersect(p
->family
, u
, prefixlen
, &a
->in_addr
, a
->prefixlen
))
110 /* Don't clash with addresses already pulled from the pool, but not assigned yet */
111 LIST_FOREACH(addresses
, a
, l
->pool_addresses
) {
112 if (a
->family
!= p
->family
)
115 if (in_addr_prefix_intersect(p
->family
, u
, prefixlen
, &a
->in_addr
, a
->prefixlen
))
120 /* And don't clash with configured but un-assigned addresses either */
121 LIST_FOREACH(networks
, n
, p
->manager
->networks
) {
124 LIST_FOREACH(addresses
, a
, n
->static_addresses
) {
125 if (a
->family
!= p
->family
)
128 if (in_addr_prefix_intersect(p
->family
, u
, prefixlen
, &a
->in_addr
, a
->prefixlen
))
136 int address_pool_acquire(AddressPool
*p
, unsigned prefixlen
, union in_addr_union
*found
) {
137 union in_addr_union u
;
140 assert(prefixlen
> 0);
143 if (p
->prefixlen
> prefixlen
)
148 if (!address_pool_prefix_is_taken(p
, &u
, prefixlen
)) {
149 _cleanup_free_
char *s
= NULL
;
151 in_addr_to_string(p
->family
, &u
, &s
);
152 log_debug("Found range %s/%u", strna(s
), prefixlen
);
158 if (!in_addr_prefix_next(p
->family
, &u
, prefixlen
))
161 if (!in_addr_prefix_intersect(p
->family
, &p
->in_addr
, p
->prefixlen
, &u
, prefixlen
))