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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* nm-rdisc.c - Perform IPv6 router discovery
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2013 Red Hat, Inc.
*/
#include "config.h"
#include <stdlib.h>
#include <arpa/inet.h>
#include "nm-rdisc.h"
#include "nm-logging.h"
#include "nm-utils.h"
#define debug(...) nm_log_dbg (LOGD_IP6, __VA_ARGS__)
G_DEFINE_TYPE (NMRDisc, nm_rdisc, G_TYPE_OBJECT)
enum {
CONFIG_CHANGED,
RA_TIMEOUT,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
/******************************************************************/
void
nm_rdisc_set_iid (NMRDisc *rdisc, const NMUtilsIPv6IfaceId iid)
{
g_return_if_fail (NM_IS_RDISC (rdisc));
rdisc->iid = iid;
}
void
nm_rdisc_start (NMRDisc *rdisc)
{
NMRDiscClass *klass = NM_RDISC_GET_CLASS (rdisc);
g_assert (klass->start);
debug ("(%s): starting router discovery: %d", rdisc->ifname, rdisc->ifindex);
if (klass->start)
klass->start (rdisc);
}
#define CONFIG_MAP_MAX_STR 7
static void
config_map_to_string (NMRDiscConfigMap map, char *p)
{
if (map & NM_RDISC_CONFIG_DHCP_LEVEL)
*p++ = 'd';
if (map & NM_RDISC_CONFIG_GATEWAYS)
*p++ = 'G';
if (map & NM_RDISC_CONFIG_ADDRESSES)
*p++ = 'A';
if (map & NM_RDISC_CONFIG_ROUTES)
*p++ = 'R';
if (map & NM_RDISC_CONFIG_DNS_SERVERS)
*p++ = 'S';
if (map & NM_RDISC_CONFIG_DNS_DOMAINS)
*p++ = 'D';
*p = '\0';
}
static const char *
dhcp_level_to_string (NMRDiscDHCPLevel dhcp_level)
{
switch (dhcp_level) {
case NM_RDISC_DHCP_LEVEL_NONE:
return "none";
case NM_RDISC_DHCP_LEVEL_OTHERCONF:
return "otherconf";
case NM_RDISC_DHCP_LEVEL_MANAGED:
return "managed";
default:
return "INVALID";
}
}
#define expiry(item) (item->timestamp + item->lifetime)
static void
config_changed (NMRDisc *rdisc, NMRDiscConfigMap changed)
{
int i;
char changedstr[CONFIG_MAP_MAX_STR];
char addrstr[INET6_ADDRSTRLEN];
if (nm_logging_enabled (LOGL_DEBUG, LOGD_IP6)) {
config_map_to_string (changed, changedstr);
debug ("(%s): router discovery configuration changed [%s]:", rdisc->ifname, changedstr);
debug (" dhcp-level %s", dhcp_level_to_string (rdisc->dhcp_level));
for (i = 0; i < rdisc->gateways->len; i++) {
NMRDiscGateway *gateway = &g_array_index (rdisc->gateways, NMRDiscGateway, i);
inet_ntop (AF_INET6, &gateway->address, addrstr, sizeof (addrstr));
debug (" gateway %s pref %d exp %u", addrstr, gateway->preference, expiry (gateway));
}
for (i = 0; i < rdisc->addresses->len; i++) {
NMRDiscAddress *address = &g_array_index (rdisc->addresses, NMRDiscAddress, i);
inet_ntop (AF_INET6, &address->address, addrstr, sizeof (addrstr));
debug (" address %s exp %u", addrstr, expiry (address));
}
for (i = 0; i < rdisc->routes->len; i++) {
NMRDiscRoute *route = &g_array_index (rdisc->routes, NMRDiscRoute, i);
inet_ntop (AF_INET6, &route->network, addrstr, sizeof (addrstr));
debug (" route %s/%d via %s pref %d exp %u", addrstr, route->plen,
nm_utils_inet6_ntop (&route->gateway, NULL), route->preference,
expiry (route));
}
for (i = 0; i < rdisc->dns_servers->len; i++) {
NMRDiscDNSServer *dns_server = &g_array_index (rdisc->dns_servers, NMRDiscDNSServer, i);
inet_ntop (AF_INET6, &dns_server->address, addrstr, sizeof (addrstr));
debug (" dns_server %s exp %u", addrstr, expiry (dns_server));
}
for (i = 0; i < rdisc->dns_domains->len; i++) {
NMRDiscDNSDomain *dns_domain = &g_array_index (rdisc->dns_domains, NMRDiscDNSDomain, i);
debug (" dns_domain %s exp %u", dns_domain->domain, expiry (dns_domain));
}
}
}
/******************************************************************/
static void
nm_rdisc_init (NMRDisc *rdisc)
{
rdisc->gateways = g_array_new (FALSE, FALSE, sizeof (NMRDiscGateway));
rdisc->addresses = g_array_new (FALSE, FALSE, sizeof (NMRDiscAddress));
rdisc->routes = g_array_new (FALSE, FALSE, sizeof (NMRDiscRoute));
rdisc->dns_servers = g_array_new (FALSE, FALSE, sizeof (NMRDiscDNSServer));
rdisc->dns_domains = g_array_new (FALSE, FALSE, sizeof (NMRDiscDNSDomain));
rdisc->hop_limit = 64;
}
static void
nm_rdisc_finalize (GObject *object)
{
NMRDisc *rdisc = NM_RDISC (object);
g_free (rdisc->ifname);
g_array_unref (rdisc->gateways);
g_array_unref (rdisc->addresses);
g_array_unref (rdisc->routes);
g_array_unref (rdisc->dns_servers);
g_array_unref (rdisc->dns_domains);
}
static void
nm_rdisc_class_init (NMRDiscClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = nm_rdisc_finalize;
klass->config_changed = config_changed;
signals[CONFIG_CHANGED] = g_signal_new (
NM_RDISC_CONFIG_CHANGED,
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (NMRDiscClass, config_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 1, G_TYPE_INT);
signals[RA_TIMEOUT] = g_signal_new (
NM_RDISC_RA_TIMEOUT,
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (NMRDiscClass, ra_timeout),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
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