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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 <netinet/icmp6.h>
#include <linux/if.h>
#include "sd-ndisc.h"
#include "networkd-link.h"
static void ndisc_router_handler(sd_ndisc *nd, uint8_t flags, const struct in6_addr *gateway, unsigned lifetime, int pref, void *userdata) {
Link *link = userdata;
int r;
assert(link);
assert(link->network);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
if (flags & (ND_RA_FLAG_MANAGED | ND_RA_FLAG_OTHER)) {
if (flags & ND_RA_FLAG_MANAGED)
dhcp6_request_address(link);
r = sd_dhcp6_client_start(link->dhcp6_client);
if (r < 0 && r != -EALREADY)
log_link_warning_errno(link, r, "Starting DHCPv6 client on NDisc request failed: %m");
}
}
static void ndisc_handler(sd_ndisc *nd, int event, void *userdata) {
Link *link = userdata;
int r;
assert(link);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
return;
switch (event) {
case SD_NDISC_EVENT_TIMEOUT:
dhcp6_request_address(link);
r = sd_dhcp6_client_start(link->dhcp6_client);
if (r < 0 && r != -EALREADY)
log_link_warning_errno(link, r, "Starting DHCPv6 client after NDisc timeout failed: %m");
break;
case SD_NDISC_EVENT_STOP:
break;
default:
log_link_warning(link, "IPv6 Neighbor Discovery unknown event: %d", event);
}
}
int ndisc_configure(Link *link) {
int r;
assert_return(link, -EINVAL);
r = sd_ndisc_new(&link->ndisc_router_discovery);
if (r < 0)
return r;
r = sd_ndisc_attach_event(link->ndisc_router_discovery, NULL, 0);
if (r < 0)
return r;
r = sd_ndisc_set_mac(link->ndisc_router_discovery, &link->mac);
if (r < 0)
return r;
r = sd_ndisc_set_index(link->ndisc_router_discovery, link->ifindex);
if (r < 0)
return r;
r = sd_ndisc_set_callback(link->ndisc_router_discovery,
ndisc_router_handler,
NULL,
NULL,
ndisc_handler,
link);
return r;
}
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