dace710c4a
This makes users can configure DHCPv4 client with ClientIdentifier=duid-only. If set so, then DHCP client sends only DUID as the client identifier. This may not be RFC compliant, but some setups require this. Closes #7828.
805 lines
30 KiB
C
805 lines
30 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2013-2014 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <netinet/ether.h>
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#include <linux/if.h>
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#include "alloc-util.h"
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#include "dhcp-lease-internal.h"
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#include "hostname-util.h"
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#include "parse-util.h"
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#include "netdev/vrf.h"
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#include "network-internal.h"
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#include "networkd-link.h"
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#include "networkd-manager.h"
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#include "networkd-network.h"
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#include "string-util.h"
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#include "sysctl-util.h"
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static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m,
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void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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int r;
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assert(link);
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assert(link->dhcp4_messages > 0);
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link->dhcp4_messages--;
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
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link_enter_failed(link);
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}
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if (link->dhcp4_messages == 0) {
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link->dhcp4_configured = true;
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link_check_ready(link);
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}
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return 1;
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}
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static int route_scope_from_address(const Route *route, const struct in_addr *self_addr) {
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assert(route);
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assert(self_addr);
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if (in_addr_is_localhost(AF_INET, &route->dst) ||
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(self_addr->s_addr && route->dst.in.s_addr == self_addr->s_addr))
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return RT_SCOPE_HOST;
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else if (in4_addr_is_null(&route->gw.in))
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return RT_SCOPE_LINK;
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else
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return RT_SCOPE_UNIVERSE;
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}
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static int link_set_dhcp_routes(Link *link) {
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_cleanup_free_ sd_dhcp_route **static_routes = NULL;
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bool classless_route = false, static_route = false;
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struct in_addr gateway, address;
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int r, n, i;
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uint32_t table;
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assert(link);
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if (!link->dhcp_lease) /* link went down while we configured the IP addresses? */
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return 0;
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if (!link->network) /* link went down while we configured the IP addresses? */
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return 0;
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if (!link->network->dhcp_use_routes)
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return 0;
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/* When the interface is part of an VRF use the VRFs routing table, unless
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* there is a another table specified. */
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table = link->network->dhcp_route_table;
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if (!link->network->dhcp_route_table_set && link->network->vrf != NULL)
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table = VRF(link->network->vrf)->table;
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r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
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if (r < 0)
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return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");
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n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
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if (n < 0)
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log_link_debug_errno(link, n, "DHCP error: could not get routes: %m");
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for (i = 0; i < n; i++) {
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if (static_routes[i]->option == SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE)
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classless_route = true;
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if (static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE)
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static_route = true;
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}
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for (i = 0; i < n; i++) {
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_cleanup_route_free_ Route *route = NULL;
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/* if the DHCP server returns both a Classless Static Routes option and a Static Routes option,
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the DHCP client MUST ignore the Static Routes option. */
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if (classless_route && static_routes[i]->option == SD_DHCP_OPTION_STATIC_ROUTE)
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continue;
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r = route_new(&route);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not allocate route: %m");
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route->family = AF_INET;
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route->protocol = RTPROT_DHCP;
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assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
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assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
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assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
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route->priority = link->network->dhcp_route_metric;
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route->table = table;
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route->scope = route_scope_from_address(route, &address);
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r = route_configure(route, link, dhcp4_route_handler);
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if (r < 0)
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return log_link_warning_errno(link, r, "Could not set host route: %m");
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link->dhcp4_messages++;
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}
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r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
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if (r == -ENODATA)
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log_link_info_errno(link, r, "DHCP: No routes received from DHCP server: %m");
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else if (r < 0)
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log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");
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/* According to RFC 3442: If the DHCP server returns both a Classless Static Routes option and
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a Router option, the DHCP client MUST ignore the Router option. */
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if (classless_route && static_route)
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log_link_warning(link, "Classless static routes received from DHCP server: ignoring static-route option and router option");
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if (r >= 0 && !classless_route) {
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_cleanup_route_free_ Route *route = NULL;
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_cleanup_route_free_ Route *route_gw = NULL;
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r = route_new(&route);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not allocate route: %m");
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route->protocol = RTPROT_DHCP;
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r = route_new(&route_gw);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not allocate route: %m");
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/* The dhcp netmask may mask out the gateway. Add an explicit
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* route for the gw host so that we can route no matter the
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* netmask or existing kernel route tables. */
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route_gw->family = AF_INET;
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route_gw->dst.in = gateway;
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route_gw->dst_prefixlen = 32;
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route_gw->prefsrc.in = address;
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route_gw->scope = RT_SCOPE_LINK;
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route_gw->protocol = RTPROT_DHCP;
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route_gw->priority = link->network->dhcp_route_metric;
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route_gw->table = table;
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r = route_configure(route_gw, link, dhcp4_route_handler);
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if (r < 0)
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return log_link_warning_errno(link, r, "Could not set host route: %m");
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link->dhcp4_messages++;
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route->family = AF_INET;
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route->gw.in = gateway;
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route->prefsrc.in = address;
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route->priority = link->network->dhcp_route_metric;
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route->table = table;
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r = route_configure(route, link, dhcp4_route_handler);
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not set routes: %m");
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link_enter_failed(link);
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return r;
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}
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link->dhcp4_messages++;
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}
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return 0;
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}
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static int dhcp_lease_lost(Link *link) {
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_cleanup_address_free_ Address *address = NULL;
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struct in_addr addr;
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struct in_addr netmask;
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struct in_addr gateway;
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unsigned prefixlen = 0;
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int r;
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assert(link);
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assert(link->dhcp_lease);
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log_link_warning(link, "DHCP lease lost");
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if (link->network->dhcp_use_routes) {
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_cleanup_free_ sd_dhcp_route **routes = NULL;
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int n, i;
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n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
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if (n >= 0) {
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for (i = 0; i < n; i++) {
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_cleanup_route_free_ Route *route = NULL;
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r = route_new(&route);
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if (r >= 0) {
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route->family = AF_INET;
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assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0);
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assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0);
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assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0);
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route_remove(route, link,
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link_route_remove_handler);
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}
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}
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}
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}
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r = address_new(&address);
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if (r >= 0) {
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r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
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if (r >= 0) {
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_cleanup_route_free_ Route *route_gw = NULL;
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_cleanup_route_free_ Route *route = NULL;
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r = route_new(&route_gw);
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if (r >= 0) {
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route_gw->family = AF_INET;
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route_gw->dst.in = gateway;
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route_gw->dst_prefixlen = 32;
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route_gw->scope = RT_SCOPE_LINK;
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route_remove(route_gw, link,
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link_route_remove_handler);
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}
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r = route_new(&route);
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if (r >= 0) {
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route->family = AF_INET;
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route->gw.in = gateway;
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route_remove(route, link,
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link_route_remove_handler);
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}
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}
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r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
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if (r >= 0) {
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r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
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if (r >= 0)
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prefixlen = in4_addr_netmask_to_prefixlen(&netmask);
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address->family = AF_INET;
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address->in_addr.in = addr;
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address->prefixlen = prefixlen;
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address_remove(address, link, link_address_remove_handler);
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}
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}
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if (link->network->dhcp_use_mtu) {
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uint16_t mtu;
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r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);
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if (r >= 0 && link->original_mtu != mtu) {
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r = link_set_mtu(link, link->original_mtu);
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if (r < 0) {
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log_link_warning(link,
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"DHCP error: could not reset MTU");
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link_enter_failed(link);
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return r;
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}
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}
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}
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if (link->network->dhcp_use_hostname) {
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const char *hostname = NULL;
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if (link->network->dhcp_hostname)
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hostname = link->network->dhcp_hostname;
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else
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(void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
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if (hostname) {
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/* If a hostname was set due to the lease, then unset it now. */
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r = manager_set_hostname(link->manager, NULL);
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if (r < 0)
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log_link_warning_errno(link, r, "Failed to reset transient hostname: %m");
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}
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}
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link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
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link_dirty(link);
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link->dhcp4_configured = false;
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return 0;
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}
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static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
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void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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int r;
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assert(link);
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");
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link_enter_failed(link);
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} else if (r >= 0)
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manager_rtnl_process_address(rtnl, m, link->manager);
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link_set_dhcp_routes(link);
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return 1;
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}
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static int dhcp4_update_address(Link *link,
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struct in_addr *address,
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struct in_addr *netmask,
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uint32_t lifetime) {
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_cleanup_address_free_ Address *addr = NULL;
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unsigned prefixlen;
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int r;
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assert(address);
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assert(netmask);
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assert(lifetime);
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prefixlen = in4_addr_netmask_to_prefixlen(netmask);
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r = address_new(&addr);
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if (r < 0)
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return r;
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addr->family = AF_INET;
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addr->in_addr.in.s_addr = address->s_addr;
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addr->cinfo.ifa_prefered = lifetime;
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addr->cinfo.ifa_valid = lifetime;
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addr->prefixlen = prefixlen;
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addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr;
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/* allow reusing an existing address and simply update its lifetime
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* in case it already exists */
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r = address_configure(addr, link, dhcp4_address_handler, true);
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if (r < 0)
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return r;
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return 0;
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}
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static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {
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sd_dhcp_lease *lease;
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struct in_addr address;
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struct in_addr netmask;
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uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
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int r;
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assert(link);
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assert(client);
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assert(link->network);
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r = sd_dhcp_client_get_lease(client, &lease);
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if (r < 0)
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return log_link_warning_errno(link, r, "DHCP error: no lease: %m");
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sd_dhcp_lease_unref(link->dhcp_lease);
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link->dhcp4_configured = false;
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link->dhcp_lease = sd_dhcp_lease_ref(lease);
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link_dirty(link);
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r = sd_dhcp_lease_get_address(lease, &address);
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if (r < 0)
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return log_link_warning_errno(link, r, "DHCP error: no address: %m");
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r = sd_dhcp_lease_get_netmask(lease, &netmask);
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if (r < 0)
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return log_link_warning_errno(link, r, "DHCP error: no netmask: %m");
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if (!link->network->dhcp_critical) {
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r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
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if (r < 0)
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return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
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}
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r = dhcp4_update_address(link, &address, &netmask, lifetime);
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not update IP address: %m");
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link_enter_failed(link);
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return r;
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}
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return 0;
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}
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static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
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sd_dhcp_lease *lease;
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struct in_addr address;
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struct in_addr netmask;
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struct in_addr gateway;
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unsigned prefixlen;
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uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
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int r;
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assert(client);
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assert(link);
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r = sd_dhcp_client_get_lease(client, &lease);
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if (r < 0)
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return log_link_error_errno(link, r, "DHCP error: No lease: %m");
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r = sd_dhcp_lease_get_address(lease, &address);
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if (r < 0)
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return log_link_error_errno(link, r, "DHCP error: No address: %m");
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r = sd_dhcp_lease_get_netmask(lease, &netmask);
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if (r < 0)
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return log_link_error_errno(link, r, "DHCP error: No netmask: %m");
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prefixlen = in4_addr_netmask_to_prefixlen(&netmask);
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r = sd_dhcp_lease_get_router(lease, &gateway);
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if (r < 0 && r != -ENODATA)
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return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");
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if (r >= 0)
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log_struct(LOG_INFO,
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LOG_LINK_INTERFACE(link),
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LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
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ADDRESS_FMT_VAL(address),
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prefixlen,
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ADDRESS_FMT_VAL(gateway)),
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"ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
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"PREFIXLEN=%u", prefixlen,
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"GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway),
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NULL);
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else
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log_struct(LOG_INFO,
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LOG_LINK_INTERFACE(link),
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LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
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ADDRESS_FMT_VAL(address),
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prefixlen),
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"ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
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"PREFIXLEN=%u", prefixlen,
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NULL);
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link->dhcp_lease = sd_dhcp_lease_ref(lease);
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link_dirty(link);
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if (link->network->dhcp_use_mtu) {
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uint16_t mtu;
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r = sd_dhcp_lease_get_mtu(lease, &mtu);
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if (r >= 0) {
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r = link_set_mtu(link, mtu);
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if (r < 0)
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log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
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}
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}
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if (link->network->dhcp_use_hostname) {
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const char *dhcpname = NULL;
|
|
_cleanup_free_ char *hostname = NULL;
|
|
|
|
if (link->network->dhcp_hostname)
|
|
dhcpname = link->network->dhcp_hostname;
|
|
else
|
|
(void) sd_dhcp_lease_get_hostname(lease, &dhcpname);
|
|
|
|
if (dhcpname) {
|
|
r = shorten_overlong(dhcpname, &hostname);
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "Unable to shorten overlong DHCP hostname '%s', ignoring: %m", dhcpname);
|
|
if (r == 1)
|
|
log_link_notice(link, "Overlong DCHP hostname received, shortened from '%s' to '%s'", dhcpname, hostname);
|
|
}
|
|
|
|
if (hostname) {
|
|
r = manager_set_hostname(link->manager, hostname);
|
|
if (r < 0)
|
|
log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
|
|
}
|
|
}
|
|
|
|
if (link->network->dhcp_use_timezone) {
|
|
const char *tz = NULL;
|
|
|
|
(void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
|
|
|
|
if (tz) {
|
|
r = manager_set_timezone(link->manager, tz);
|
|
if (r < 0)
|
|
log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
|
|
}
|
|
}
|
|
|
|
if (!link->network->dhcp_critical) {
|
|
r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
|
|
return r;
|
|
}
|
|
}
|
|
|
|
r = dhcp4_update_address(link, &address, &netmask, lifetime);
|
|
if (r < 0) {
|
|
log_link_warning_errno(link, r, "Could not update IP address: %m");
|
|
link_enter_failed(link);
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) {
|
|
Link *link = userdata;
|
|
int r = 0;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->manager);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return;
|
|
|
|
switch (event) {
|
|
case SD_DHCP_CLIENT_EVENT_EXPIRED:
|
|
case SD_DHCP_CLIENT_EVENT_STOP:
|
|
case SD_DHCP_CLIENT_EVENT_IP_CHANGE:
|
|
if (link->network->dhcp_critical) {
|
|
log_link_error(link, "DHCPv4 connection considered system critical, ignoring request to reconfigure it.");
|
|
return;
|
|
}
|
|
|
|
if (link->dhcp_lease) {
|
|
r = dhcp_lease_lost(link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) {
|
|
r = dhcp_lease_acquired(client, link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return;
|
|
}
|
|
}
|
|
|
|
break;
|
|
case SD_DHCP_CLIENT_EVENT_RENEW:
|
|
r = dhcp_lease_renew(client, link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return;
|
|
}
|
|
break;
|
|
case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE:
|
|
r = dhcp_lease_acquired(client, link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
if (event < 0)
|
|
log_link_warning_errno(link, event, "DHCP error: Client failed: %m");
|
|
else
|
|
log_link_warning(link, "DHCP unknown event: %i", event);
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static int dhcp4_set_hostname(Link *link) {
|
|
_cleanup_free_ char *hostname = NULL;
|
|
const char *hn;
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (!link->network->dhcp_send_hostname)
|
|
hn = NULL;
|
|
else if (link->network->dhcp_hostname)
|
|
hn = link->network->dhcp_hostname;
|
|
else {
|
|
r = gethostname_strict(&hostname);
|
|
if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */
|
|
return r;
|
|
|
|
hn = hostname;
|
|
}
|
|
|
|
return sd_dhcp_client_set_hostname(link->dhcp_client, hn);
|
|
}
|
|
|
|
static bool promote_secondaries_enabled(const char *ifname) {
|
|
_cleanup_free_ char *promote_secondaries_sysctl = NULL;
|
|
char *promote_secondaries_path;
|
|
int r;
|
|
|
|
promote_secondaries_path = strjoina("net/ipv4/conf/", ifname, "/promote_secondaries");
|
|
r = sysctl_read(promote_secondaries_path, &promote_secondaries_sysctl);
|
|
if (r < 0) {
|
|
log_debug_errno(r, "Cannot read sysctl %s", promote_secondaries_path);
|
|
return false;
|
|
}
|
|
|
|
truncate_nl(promote_secondaries_sysctl);
|
|
r = parse_boolean(promote_secondaries_sysctl);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Cannot parse sysctl %s with content %s as boolean", promote_secondaries_path, promote_secondaries_sysctl);
|
|
return r > 0;
|
|
}
|
|
|
|
/* dhcp4_set_promote_secondaries will ensure this interface has
|
|
* the "promote_secondaries" option in the kernel set. If this sysctl
|
|
* is not set DHCP will work only as long as the IP address does not
|
|
* changes between leases. The kernel will remove all secondary IP
|
|
* addresses of an interface otherwise. The way systemd-network works
|
|
* is that the new IP of a lease is added as a secondary IP and when
|
|
* the primary one expires it relies on the kernel to promote the
|
|
* secondary IP. See also https://github.com/systemd/systemd/issues/7163
|
|
*/
|
|
int dhcp4_set_promote_secondaries(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);
|
|
|
|
/* check if the kernel has promote_secondaries enabled for our
|
|
* interface. If it is not globally enabled or enabled for the
|
|
* specific interface we must either enable it.
|
|
*/
|
|
if (!(promote_secondaries_enabled("all") || promote_secondaries_enabled(link->ifname))) {
|
|
char *promote_secondaries_path = NULL;
|
|
|
|
log_link_debug(link, "promote_secondaries is unset, setting it");
|
|
promote_secondaries_path = strjoina("net/ipv4/conf/", link->ifname, "/promote_secondaries");
|
|
r = sysctl_write(promote_secondaries_path, "1");
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "cannot set sysctl %s to 1", promote_secondaries_path);
|
|
return r > 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dhcp4_configure(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);
|
|
|
|
if (!link->dhcp_client) {
|
|
r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_dhcp_client_set_mac(link->dhcp_client,
|
|
(const uint8_t *) &link->mac,
|
|
sizeof (link->mac), ARPHRD_ETHER);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_dhcp_client_set_ifindex(link->dhcp_client, link->ifindex);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,
|
|
link->network->dhcp_broadcast);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (link->mtu) {
|
|
r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (link->network->dhcp_use_mtu) {
|
|
r = sd_dhcp_client_set_request_option(link->dhcp_client,
|
|
SD_DHCP_OPTION_INTERFACE_MTU);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
/* NOTE: even if this variable is called "use", it also "sends" PRL
|
|
* options, maybe there should be a different configuration variable
|
|
* to send or not route options?. */
|
|
/* NOTE: when using Anonymize=yes, routes PRL options are sent
|
|
* by default, so they don't need to be added here. */
|
|
if (link->network->dhcp_use_routes && !link->network->dhcp_anonymize) {
|
|
r = sd_dhcp_client_set_request_option(link->dhcp_client,
|
|
SD_DHCP_OPTION_STATIC_ROUTE);
|
|
if (r < 0)
|
|
return r;
|
|
r = sd_dhcp_client_set_request_option(link->dhcp_client,
|
|
SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (link->network->dhcp_use_ntp) {
|
|
r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (link->network->dhcp_use_timezone) {
|
|
r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = dhcp4_set_hostname(link);
|
|
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;
|
|
}
|
|
|
|
if (link->network->dhcp_client_port) {
|
|
r = sd_dhcp_client_set_client_port(link->dhcp_client, link->network->dhcp_client_port);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
switch (link->network->dhcp_client_identifier) {
|
|
case DHCP_CLIENT_ID_DUID: {
|
|
/* If configured, apply user specified DUID and/or IAID */
|
|
const DUID *duid = link_duid(link);
|
|
|
|
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
|
|
link->network->iaid,
|
|
duid->type,
|
|
duid->raw_data_len > 0 ? duid->raw_data : NULL,
|
|
duid->raw_data_len);
|
|
if (r < 0)
|
|
return r;
|
|
break;
|
|
}
|
|
case DHCP_CLIENT_ID_DUID_ONLY: {
|
|
/* If configured, apply user specified DUID */
|
|
const DUID *duid = link_duid(link);
|
|
|
|
r = sd_dhcp_client_set_duid(link->dhcp_client,
|
|
duid->type,
|
|
duid->raw_data_len > 0 ? duid->raw_data : NULL,
|
|
duid->raw_data_len);
|
|
if (r < 0)
|
|
return r;
|
|
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;
|
|
}
|