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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2014 Intel Corporation. All rights reserved.
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <netinet/ether.h>
#include <linux/if.h>
#include "networkd-link.h"
#include "network-internal.h"
#include "sd-icmp6-nd.h"
#include "sd-dhcp6-client.h"
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
Link *link = userdata;
assert(link);
assert(link->network);
assert(link->manager);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
switch(event) {
case DHCP6_EVENT_STOP:
case DHCP6_EVENT_RESEND_EXPIRE:
case DHCP6_EVENT_RETRANS_MAX:
case DHCP6_EVENT_IP_ACQUIRE:
case DHCP6_EVENT_INFORMATION_REQUEST:
log_link_debug(link, "DHCPv6 event %d", event);
break;
default:
if (event < 0)
log_link_warning(link, "DHCPv6 error: %s",
strerror(-event));
else
log_link_warning(link, "DHCPv6 unknown event: %d",
event);
return;
}
}
static int dhcp6_configure(Link *link, int event) {
int r;
bool information_request;
assert_return(link, -EINVAL);
if (link->dhcp6_client) {
if (event != ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED)
return 0;
r = sd_dhcp6_client_get_information_request(link->dhcp6_client,
&information_request);
if (r < 0) {
log_link_warning(link, "Could not get DHCPv6 Information request setting");
link->dhcp6_client =
sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
if (!information_request)
return r;
r = sd_dhcp6_client_set_information_request(link->dhcp6_client,
false);
if (r < 0) {
log_link_warning(link, "Could not unset DHCPv6 Information request");
link->dhcp6_client =
sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
r = sd_dhcp6_client_start(link->dhcp6_client);
if (r < 0) {
log_link_warning(link, "Could not restart DHCPv6 after enabling Information request");
link->dhcp6_client =
sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
return r;
}
r = sd_dhcp6_client_new(&link->dhcp6_client);
if (r < 0)
return r;
r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0);
if (r < 0) {
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
r = sd_dhcp6_client_set_mac(link->dhcp6_client,
(const uint8_t *) &link->mac,
sizeof (link->mac), ARPHRD_ETHER);
if (r < 0) {
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
r = sd_dhcp6_client_set_index(link->dhcp6_client, link->ifindex);
if (r < 0) {
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
r = sd_dhcp6_client_set_callback(link->dhcp6_client, dhcp6_handler,
link);
if (r < 0) {
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
if (event == ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER) {
r = sd_dhcp6_client_set_information_request(link->dhcp6_client,
true);
if (r < 0) {
link->dhcp6_client =
sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
}
r = sd_dhcp6_client_start(link->dhcp6_client);
if (r < 0)
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) {
Link *link = userdata;
assert(link);
assert(link->network);
assert(link->manager);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
switch(event) {
case ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE:
return;
case ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT:
case ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER:
case ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED:
break;
default:
if (event < 0)
log_link_warning(link, "ICMPv6 error: %s",
strerror(-event));
else
log_link_warning(link, "ICMPv6 unknown event: %d",
event);
return;
}
dhcp6_configure(link, event);
}
int icmp6_configure(Link *link) {
int r;
assert_return(link, -EINVAL);
r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
if (r < 0)
return r;
r = sd_icmp6_nd_attach_event(link->icmp6_router_discovery, NULL, 0);
if (r < 0)
return r;
r = sd_icmp6_nd_set_mac(link->icmp6_router_discovery, &link->mac);
if (r < 0)
return r;
r = sd_icmp6_nd_set_index(link->icmp6_router_discovery, link->ifindex);
if (r < 0)
return r;
r = sd_icmp6_nd_set_callback(link->icmp6_router_discovery,
icmp6_router_handler, link);
return r;
}
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