f8862395e8
The Router DHCP option may contain a list of one or more routers ([1]). Extend the API of sd_dhcp_lease to return a list instead of only the first. Note that networkd still only uses the first router (if present). Aside from extending the internal API of the DHCP client, there is almost no change in behavior. The only visible difference in behavior is that the "ROUTER" variable in the lease file is now a list of addresses. Note how RFC 2132 does not define certain IP addresses as invalid for the router option. Still, previously sd_dhcp_lease_get_router() would never return a "0.0.0.0" address. In fact, the previous API could not differenciate whether no router option was present, whether it was invalid, or whether its first router was "0.0.0.0". No longer let the DHCP client library impose additional restrictions that are not part of RFC. Instead, the caller should handle this. The patch does that, and networkd only consideres the first router entry if it is not "0.0.0.0". [1] https://tools.ietf.org/html/rfc2132#section-3.5
67 lines
3 KiB
C
67 lines
3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#ifndef foosddhcpleasehfoo
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#define foosddhcpleasehfoo
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/***
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Copyright © 2013 Intel Corporation. All rights reserved.
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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 <inttypes.h>
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#include <net/ethernet.h>
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#include <netinet/in.h>
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#include <sys/types.h>
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#include "_sd-common.h"
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_SD_BEGIN_DECLARATIONS;
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typedef struct sd_dhcp_lease sd_dhcp_lease;
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typedef struct sd_dhcp_route sd_dhcp_route;
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sd_dhcp_lease *sd_dhcp_lease_ref(sd_dhcp_lease *lease);
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sd_dhcp_lease *sd_dhcp_lease_unref(sd_dhcp_lease *lease);
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int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime);
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int sd_dhcp_lease_get_t1(sd_dhcp_lease *lease, uint32_t *t1);
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int sd_dhcp_lease_get_t2(sd_dhcp_lease *lease, uint32_t *t2);
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int sd_dhcp_lease_get_broadcast(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, const struct in_addr **addr);
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int sd_dhcp_lease_get_next_server(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_server_identifier(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, const struct in_addr **addr);
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int sd_dhcp_lease_get_ntp(sd_dhcp_lease *lease, const struct in_addr **addr);
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int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu);
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int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname);
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int sd_dhcp_lease_get_search_domains(sd_dhcp_lease *lease, char ***domains);
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int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname);
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int sd_dhcp_lease_get_root_path(sd_dhcp_lease *lease, const char **root_path);
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int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, sd_dhcp_route ***routes);
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int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease *lease, const void **data, size_t *data_len);
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int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const void **client_id, size_t *client_id_len);
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int sd_dhcp_lease_get_timezone(sd_dhcp_lease *lease, const char **timezone);
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int sd_dhcp_route_get_destination(sd_dhcp_route *route, struct in_addr *destination);
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int sd_dhcp_route_get_destination_prefix_length(sd_dhcp_route *route, uint8_t *length);
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int sd_dhcp_route_get_gateway(sd_dhcp_route *route, struct in_addr *gateway);
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int sd_dhcp_route_get_option(sd_dhcp_route *route);
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_SD_DEFINE_POINTER_CLEANUP_FUNC(sd_dhcp_lease, sd_dhcp_lease_unref);
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_SD_END_DECLARATIONS;
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#endif
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