src/network/networkd-dhcp4.c

	networkd-dhcp4.c revision 4b7b5abb785c03cb880e3a8a7a724d7de6e9cf3b
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering/***
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  This file is part of systemd.
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  Copyright 2013-2014 Tom Gundersen <teg@jklm.no>
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  systemd is free software; you can redistribute it and/or modify it
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  under the terms of the GNU Lesser General Public License as published by
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  the Free Software Foundation; either version 2.1 of the License, or
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  (at your option) any later version.
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  systemd is distributed in the hope that it will be useful, but
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  WITHOUT ANY WARRANTY; without even the implied warranty of
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  Lesser General Public License for more details.
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  You should have received a copy of the GNU Lesser General Public License
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering  along with systemd; If not, see <http://www.gnu.org/licenses/>.
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering***/
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering#include <netinet/ether.h>
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering#include <linux/if.h>
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering#include "hostname-util.h"
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering#include "networkd-link.h"
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering#include "network-internal.h"
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering#include "dhcp-lease-internal.h"
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poetteringstatic int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                               void *userdata) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        _cleanup_link_unref_ Link *link = userdata;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        int r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link->dhcp4_messages);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        link->dhcp4_messages --;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_netlink_message_get_errno(m);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0 && r != -EEXIST) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                log_link_error(link, "could not set DHCPv4 route: %s",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                               strerror(-r));
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                link_enter_failed(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (!link->dhcp4_messages) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                link->dhcp4_configured = true;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                link_client_handler(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        return 1;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering}
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poetteringstatic int link_set_dhcp_routes(Link *link) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        struct in_addr gateway;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        struct sd_dhcp_route *static_routes;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        int r, n, i;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link->dhcp_lease);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0 && r != -ENOENT) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                log_link_warning(link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                 "DHCP error: could not get gateway: %s",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                 strerror(-r));
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r >= 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                struct in_addr address;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                _cleanup_route_free_ Route *route = NULL;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                _cleanup_route_free_ Route *route_gw = NULL;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        log_link_warning(link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                         "DHCP error: could not get address: %s",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                         strerror(-r));
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = route_new_dynamic(&route, RTPROT_DHCP);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        log_link_error(link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                       "Could not allocate route: %s",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                       strerror(-r));
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                r = route_new_dynamic(&route_gw, RTPROT_DHCP);
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                if (r < 0) {
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                log_link_error(link,
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                               "Could not allocate route: %s",
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                               strerror(-r));
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                               return r;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                }
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                /* The dhcp netmask may mask out the gateway. Add an explicit
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                 * route for the gw host so that we can route no matter the
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                 * netmask or existing kernel route tables. */
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route_gw->family = AF_INET;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route_gw->dst_addr.in = gateway;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route_gw->dst_prefixlen = 32;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route_gw->prefsrc_addr.in = address;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route_gw->scope = RT_SCOPE_LINK;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route_gw->metrics = link->network->dhcp_route_metric;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                r = route_configure(route_gw, link, &dhcp4_route_handler);
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                if (r < 0) {
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                        log_link_warning(link,
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                         "could not set host route: %s",
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                         strerror(-r));
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                        return r;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                }
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                link->dhcp4_messages ++;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route->family = AF_INET;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route->in_addr.in = gateway;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route->prefsrc_addr.in = address;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                route->metrics = link->network->dhcp_route_metric;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                r = route_configure(route, link, &dhcp4_route_handler);
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                if (r < 0) {
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                        log_link_warning(link,
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                         "could not set routes: %s",
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                         strerror(-r));
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                        link_enter_failed(link);
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                        return r;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                }
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                link->dhcp4_messages ++;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering        }
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering        if (n == -ENOENT)
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                return 0;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering        if (n < 0) {
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                log_link_warning(link,
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                 "DHCP error: could not get routes: %s",
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                 strerror(-n));
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                return n;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering        }
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering        for (i = 0; i < n; i++) {
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                _cleanup_route_free_ Route *route = NULL;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                r = route_new_dynamic(&route, RTPROT_DHCP);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        log_link_error(link, "Could not allocate route: %s",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                       strerror(-r));
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        return r;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                }
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                route->family = AF_INET;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                route->in_addr.in = static_routes[i].gw_addr;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                route->dst_addr.in = static_routes[i].dst_addr;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                route->dst_prefixlen = static_routes[i].dst_prefixlen;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                route->metrics = link->network->dhcp_route_metric;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = route_configure(route, link, &dhcp4_route_handler);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        log_link_warning(link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                         "could not set host route: %s",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                         strerror(-r));
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                link->dhcp4_messages ++;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        return 0;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering}
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poetteringstatic int dhcp_lease_lost(Link *link) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        _cleanup_address_free_ Address *address = NULL;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        struct in_addr addr;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        struct in_addr netmask;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        struct in_addr gateway;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        unsigned prefixlen = 0;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        int r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link->dhcp_lease);
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        log_link_warning(link, "DHCP lease lost");
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering        if (link->network->dhcp_routes) {
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                struct sd_dhcp_route *routes;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                int n, i;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (n >= 0) {
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering                        for (i = 0; i < n; i++) {
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering                                _cleanup_route_free_ Route *route = NULL;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                r = route_new_dynamic(&route, RTPROT_UNSPEC);
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                if (r >= 0) {
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                        route->family = AF_INET;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                        route->in_addr.in = routes[i].gw_addr;
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                        route->dst_addr.in = routes[i].dst_addr;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                        route->dst_prefixlen = routes[i].dst_prefixlen;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                        route_drop(route, link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                   &link_route_drop_handler);
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering                                }
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering                        }
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering                }
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        }
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        r = address_new_dynamic(&address);
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        if (r >= 0) {
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering                r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                if (r >= 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        _cleanup_route_free_ Route *route_gw = NULL;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        _cleanup_route_free_ Route *route = NULL;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                        r = route_new_dynamic(&route_gw, RTPROT_UNSPEC);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        if (r >= 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                route_gw->family = AF_INET;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                route_gw->dst_addr.in = gateway;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                route_gw->dst_prefixlen = 32;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                route_gw->scope = RT_SCOPE_LINK;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                route_drop(route_gw, link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                           &link_route_drop_handler);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        r = route_new_dynamic(&route, RTPROT_UNSPEC);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        if (r >= 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                route->family = AF_INET;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                route->in_addr.in = gateway;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                route_drop(route, link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                           &link_route_drop_handler);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r >= 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        if (r >= 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                prefixlen = in_addr_netmask_to_prefixlen(&netmask);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        address->family = AF_INET;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        address->in_addr.in = addr;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        address->prefixlen = prefixlen;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        address_drop(address, link, &link_address_drop_handler);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (link->network->dhcp_mtu) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                uint16_t mtu;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r >= 0 && link->original_mtu != mtu) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        r = link_set_mtu(link, link->original_mtu);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        if (r < 0) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                log_link_warning(link,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                                 "DHCP error: could not reset MTU");
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                link_enter_failed(link);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                return r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        }
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                }
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        }
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        if (link->network->dhcp_hostname) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                const char *hostname = NULL;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                if (!link->network->hostname)
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                else
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        hostname = link->network->hostname;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                if (r >= 0 || hostname) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        r = link_set_hostname(link, hostname);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        if (r < 0)
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                log_link_error_errno(link, r,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                                     "Failed to set transient hostname to '%s': %m",
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                                     hostname);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                }
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        }
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        link->dhcp4_configured = false;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        return 0;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering}
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poetteringstatic int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                 void *userdata) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        _cleanup_link_unref_ Link *link = userdata;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        int r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        assert(link);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        r = sd_netlink_message_get_errno(m);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        if (r < 0 && r != -EEXIST) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                log_link_error(link, "could not set DHCPv4 address: %s",
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                               strerror(-r));
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                link_enter_failed(link);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        } else if (r >= 0)
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                link_rtnl_process_address(rtnl, m, link->manager);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        link_set_dhcp_routes(link);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        return 1;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering}
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poetteringstatic int dhcp4_update_address(Link *link,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                struct in_addr *address,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                struct in_addr *netmask,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                uint32_t lifetime) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        _cleanup_address_free_ Address *addr = NULL;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        unsigned prefixlen;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        int r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        assert(address);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        assert(netmask);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        assert(lifetime);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        prefixlen = in_addr_netmask_to_prefixlen(netmask);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        r = address_new_dynamic(&addr);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        if (r < 0)
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                return r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        addr->family = AF_INET;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        addr->in_addr.in.s_addr = address->s_addr;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        addr->cinfo.ifa_prefered = lifetime;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        addr->cinfo.ifa_valid = lifetime;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        addr->prefixlen = prefixlen;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        /* use update rather than configure so that we will update the
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering         * lifetime of an existing address if it has already been configured */
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        r = address_update(addr, link, &dhcp4_address_handler);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        if (r < 0)
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                return r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        return 0;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering}
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poetteringstatic int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        sd_dhcp_lease *lease;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        struct in_addr address;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        struct in_addr netmask;
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        int r;
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        assert(link);
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        assert(client);
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        assert(link->network);
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        r = sd_dhcp_client_get_lease(client, &lease);
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering        if (r < 0) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                log_link_warning(link, "DHCP error: no lease %s",
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                 strerror(-r));
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering                return r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        }
df3fb561b2df486a495a5f0bcc83168bd1860533Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        sd_dhcp_lease_unref(link->dhcp_lease);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        link->dhcp4_configured = false;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        link->dhcp_lease = sd_dhcp_lease_ref(lease);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        r = sd_dhcp_lease_get_address(lease, &address);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        if (r < 0) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                log_link_warning(link, "DHCP error: no address: %s",
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                 strerror(-r));
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                return r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        }
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        r = sd_dhcp_lease_get_netmask(lease, &netmask);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        if (r < 0) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                log_link_warning(link, "DHCP error: no netmask: %s",
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                 strerror(-r));
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                return r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        }
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        if (!link->network->dhcp_critical) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                               &lifetime);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                if (r < 0) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        log_link_warning(link,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                         "DHCP error: no lifetime: %s",
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                         strerror(-r));
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        return r;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = dhcp4_update_address(link, &address, &netmask, lifetime);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                log_link_warning(link, "could not update IP address: %s",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                 strerror(-r));
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                link_enter_failed(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        return 0;
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering}
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poetteringstatic int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        sd_dhcp_lease *lease;
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        struct in_addr address;
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        struct in_addr netmask;
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        struct in_addr gateway;
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        unsigned prefixlen;
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
03cc0fd1431b82e59c11ae12a274c1f2df23169dLennart Poettering        int r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(client);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_get_lease(client, &lease);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return log_link_error_errno(link, r, "DHCP error: no lease: %m");
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_lease_get_address(lease, &address);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return log_link_error_errno(link, r, "DHCP error: no address: %m");
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_lease_get_netmask(lease, &netmask);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return log_link_error_errno(link, r, "DHCP error: no netmask: %m");
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        prefixlen = in_addr_netmask_to_prefixlen(&netmask);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        r = sd_dhcp_lease_get_router(lease, &gateway);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0 && r != -ENOENT)
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                return log_link_error_errno(link, r, "DHCP error: could not get gateway: %m");
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r >= 0)
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                log_struct(LOG_INFO,
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                           LOG_LINK_INTERFACE(link),
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                            ADDRESS_FMT_VAL(address),
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                            prefixlen,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                            ADDRESS_FMT_VAL(gateway)),
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                           "PREFIXLEN=%u", prefixlen,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                           "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway),
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                           NULL);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        else
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                log_struct(LOG_INFO,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                           LOG_LINK_INTERFACE(link),
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                            ADDRESS_FMT_VAL(address),
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                                            prefixlen),
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                           "PREFIXLEN=%u", prefixlen,
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering                           NULL);
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        link->dhcp_lease = sd_dhcp_lease_ref(lease);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
6d0c65ffb4f82e8c6dceb453919b3db54343fc27Lennart Poettering        if (link->network->dhcp_mtu) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                uint16_t mtu;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = sd_dhcp_lease_get_mtu(lease, &mtu);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                if (r >= 0) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        r = link_set_mtu(link, mtu);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (link->network->dhcp_hostname) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                const char *hostname = NULL;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (!link->network->hostname)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        r = sd_dhcp_lease_get_hostname(lease, &hostname);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                else
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        hostname = link->network->hostname;
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                if (r >= 0 || hostname) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        r = link_set_hostname(link, hostname);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (!link->network->dhcp_critical) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = dhcp4_update_address(link, &address, &netmask, lifetime);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                log_link_warning_errno(link, r, "Could not update IP address: %m");
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                link_enter_failed(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering        return 0;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering}
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poetteringstatic void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        Link *link = userdata;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        int r = 0;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link->network);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link->manager);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        switch (event) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                case DHCP_EVENT_EXPIRED:
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                case DHCP_EVENT_STOP:
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                case DHCP_EVENT_IP_CHANGE:
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        if (link->network->dhcp_critical) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                log_link_error(link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                               "DHCPv4 connection considered system critical, ignoring request to reconfigure it.");
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                return;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        if (link->dhcp_lease) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                r = dhcp_lease_lost(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                        link_enter_failed(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                        return;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        }
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                        if (event == DHCP_EVENT_IP_CHANGE) {
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                r = dhcp_lease_acquired(client, link);
9085f64a6694f2928c79fcce365edb1dca6937d4Lennart Poettering                                if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                        link_enter_failed(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                        return;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        break;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                case DHCP_EVENT_RENEW:
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        r = dhcp_lease_renew(client, link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                link_enter_failed(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                return;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        break;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                case DHCP_EVENT_IP_ACQUIRE:
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        r = dhcp_lease_acquired(client, link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        if (r < 0) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                link_enter_failed(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                return;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        break;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                default:
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        if (event < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                log_link_warning(link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                 "DHCP error: client failed: %s",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                 strerror(-event));
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        else
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                log_link_warning(link,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                 "DHCP unknown event: %d",
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                 event);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        break;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        return;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering}
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poetteringint dhcp4_configure(Link *link) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        int r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link->network);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_new(&link->dhcp_client);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_set_mac(link->dhcp_client,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                   (const uint8_t *) &link->mac,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                   sizeof (link->mac), ARPHRD_ETHER);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                 link->network->dhcp_broadcast);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (link->mtu) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (link->network->dhcp_mtu) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering             r = sd_dhcp_client_set_request_option(link->dhcp_client,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                   DHCP_OPTION_INTERFACE_MTU);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering             if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (link->network->dhcp_routes) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = sd_dhcp_client_set_request_option(link->dhcp_client,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                      DHCP_OPTION_STATIC_ROUTE);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                r = sd_dhcp_client_set_request_option(link->dhcp_client,
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                                                      DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                        return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        }
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        /* Always acquire the timezone and NTP*/
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_set_request_option(link->dhcp_client, DHCP_OPTION_NTP_SERVER);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        r = sd_dhcp_client_set_request_option(link->dhcp_client, DHCP_OPTION_NEW_TZDB_TIMEZONE);
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (r < 0)
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                return r;
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering        if (link->network->dhcp_sendhost) {
ee8c45689526ca973407cbb77bce7b96a062c40bLennart Poettering                _cleanup_free_ char *hostname = NULL;
                const char *hn = NULL;

                if (!link->network->hostname)  {
                        hostname = gethostname_malloc();
                        if (!hostname)
                                return -ENOMEM;

                        hn = hostname;
                } else
                        hn = link->network->hostname;

                if (!is_localhost(hn)) {
                        r = sd_dhcp_client_set_hostname(link->dhcp_client, hn);
                        if (r < 0)
                                return r;
                }
        }

        if (link->network->dhcp_vendor_class_identifier) {
                r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
                                                               link->network->dhcp_vendor_class_identifier);
                if (r < 0)
                        return r;
        }

        switch (link->network->dhcp_client_identifier) {
        case DHCP_CLIENT_ID_DUID:
                /* Library defaults to this. */
                break;
        case DHCP_CLIENT_ID_MAC:
                r = sd_dhcp_client_set_client_id(link->dhcp_client,
                                                 ARPHRD_ETHER,
                                                 (const uint8_t *) &link->mac,
                                                 sizeof (link->mac));
                if (r < 0)
                        return r;
                break;
        default:
                assert_not_reached("Unknown client identifier type.");
        }

        return 0;
}