mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
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8bace23beb
- All internal source files (except "examples", which are not internal) should include "config.h" first. As also all internal source files should include "nm-default.h", let "config.h" be included by "nm-default.h" and include "nm-default.h" as first in every source file. We already wanted to include "nm-default.h" before other headers because it might contains some fixes (like "nm-glib.h" compatibility) that is required first. - After including "nm-default.h", we optinally allow for including the corresponding header file for the source file at hand. The idea is to ensure that each header file is self contained. - Don't include "config.h" or "nm-default.h" in any header file (except "nm-sd-adapt.h"). Public headers anyway must not include these headers, and internal headers are never included after "nm-default.h", as of the first previous point. - Include all internal headers with quotes instead of angle brackets. In practice it doesn't matter, because in our public headers we must include other headers with angle brackets. As we use our public headers also to compile our interal source files, effectively the result must be the same. Still do it for consistency. - Except for <config.h> itself. Include it with angle brackets as suggested by https://www.gnu.org/software/autoconf/manual/autoconf.html#Configuration-Headers
105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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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, or (at your option)
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* 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) 2010 Red Hat, Inc.
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*
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*/
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#include "nm-default.h"
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#include <arpa/inet.h>
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#include <string.h>
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#include "nm-dns-utils.h"
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#include "nm-platform.h"
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#include "nm-utils.h"
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static void
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add_ip4_to_rdns_array (guint32 ip, GPtrArray *domains) /* network byte order */
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{
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guint32 defprefix;
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guchar *p;
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char *str = NULL;
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int i;
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defprefix = nm_utils_ip4_get_default_prefix (ip);
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/* Convert to host byte order, mask the host bits, and convert back */
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ip = ntohl (ip);
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ip &= 0xFFFFFFFF << (32 - defprefix);
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ip = htonl (ip);
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p = (guchar *) &ip;
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if (defprefix == 8)
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str = g_strdup_printf ("%u.in-addr.arpa", p[0] & 0xFF);
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else if (defprefix == 16)
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str = g_strdup_printf ("%u.%u.in-addr.arpa", p[1] & 0xFF, p[0] & 0xFF);
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else if (defprefix == 24)
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str = g_strdup_printf ("%u.%u.%u.in-addr.arpa", p[2] & 0xFF, p[1] & 0xFF, p[0] & 0xFF);
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if (!str) {
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g_return_if_fail (str != NULL);
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return;
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}
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/* Suppress duplicates */
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for (i = 0; i < domains->len; i++) {
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if (strcmp (str, g_ptr_array_index (domains, i)) == 0)
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break;
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}
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if (i == domains->len)
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g_ptr_array_add (domains, str);
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else
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g_free (str);
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}
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char **
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nm_dns_utils_get_ip4_rdns_domains (NMIP4Config *ip4)
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{
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GPtrArray *domains = NULL;
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int i;
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g_return_val_if_fail (ip4 != NULL, NULL);
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domains = g_ptr_array_sized_new (5);
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/* To calculate the reverse DNS domains for this IP4 config, we take
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* all the IP addresses and routes in the config, calculate the network
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* portion, and convert that to classful, and use the network bits for
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* the final domain. FIXME: better handle classless routing, which might
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* require us to add multiple domains for each actual network prefix to
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* cover all the separate networks in that block.
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*/
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for (i = 0; i < nm_ip4_config_get_num_addresses (ip4); i++) {
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const NMPlatformIP4Address *address = nm_ip4_config_get_address (ip4, i);
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add_ip4_to_rdns_array (address->address, domains);
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}
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for (i = 0; i < nm_ip4_config_get_num_routes (ip4); i++) {
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const NMPlatformIP4Route *route = nm_ip4_config_get_route (ip4, i);
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add_ip4_to_rdns_array (route->network, domains);
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}
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/* Terminating NULL so we can use g_strfreev() to free it */
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g_ptr_array_add (domains, NULL);
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/* Free the array and return NULL if the only element was the ending NULL */
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return (char **) g_ptr_array_free (domains, (domains->len == 1));
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}
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