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https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
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3bfb163a74
config.h should be included from every .c file, and it should be included before any other include. Fix that. (As a side effect of how I did this, this also changes us to consistently use "config.h" rather than <config.h>. To the extent that it matters [which is not much], quotes are more correct anyway, since we're talking about a file in our own build tree, not a system include.)
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* NetworkManager -- Network link manager
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright (C) 2013 Red Hat, Inc.
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*/
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#include "config.h"
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#include <string.h>
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#include <arpa/inet.h>
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#include "nm-dnsmasq-utils.h"
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#include "nm-platform.h"
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#include "nm-utils.h"
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gboolean
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nm_dnsmasq_utils_get_range (const NMPlatformIP4Address *addr,
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char *out_first,
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char *out_last,
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char **out_error_desc)
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{
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guint32 host = addr->address;
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guint32 prefix = addr->plen;
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guint32 netmask = nm_utils_ip4_prefix_to_netmask (prefix);
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guint32 first, last, reserved;
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g_return_val_if_fail (out_first != NULL, FALSE);
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g_return_val_if_fail (out_last != NULL, FALSE);
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if (prefix > 30) {
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if (out_error_desc)
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*out_error_desc = g_strdup_printf ("Address prefix %d is too small for DHCP.", prefix);
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return FALSE;
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}
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/* Find the first available address *after* the local machine's IP */
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first = (host & netmask) + htonl (1);
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/* Shortcut: allow a max of 253 addresses; the - htonl(1) here is to assure
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* that we don't set 'last' to the broadcast address of the network. */
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if (prefix < 24)
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last = (host | ~nm_utils_ip4_prefix_to_netmask (24)) - htonl (1);
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else
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last = (host | ~netmask) - htonl(1);
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/* Figure out which range (either above the host address or below it)
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* has more addresses. Reserve some addresses for static IPs.
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*/
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if (ntohl (host) - ntohl (first) > ntohl (last) - ntohl (host)) {
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/* Range below the host's IP address */
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reserved = (guint32) ((ntohl (host) - ntohl (first)) / 10);
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last = host - htonl (MIN (reserved, 8)) - htonl (1);
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} else {
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/* Range above host's IP address */
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reserved = (guint32) ((ntohl (last) - ntohl (host)) / 10);
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first = host + htonl (MIN (reserved, 8)) + htonl (1);
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}
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nm_utils_inet4_ntop (first, out_first);
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nm_utils_inet4_ntop (last, out_last);
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return TRUE;
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}
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