1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright (C) 2014 Tom Gundersen <teg@jklm.no>
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <linux/veth.h>
28 #include "sd-ipv4ll.h"
29 #include "sd-netlink.h"
31 #include "alloc-util.h"
32 #include "in-addr-util.h"
33 #include "netlink-util.h"
34 #include "parse-util.h"
35 #include "string-util.h"
38 static void ll_handler(sd_ipv4ll
*ll
, int event
, void *userdata
) {
39 _cleanup_free_
char *address
= NULL
;
40 struct in_addr addr
= {};
44 if (sd_ipv4ll_get_address(ll
, &addr
) >= 0)
45 assert_se(in_addr_to_string(AF_INET
, (const union in_addr_union
*) &addr
, &address
) >= 0);
48 case SD_IPV4LL_EVENT_BIND
:
49 log_info("bound %s", strna(address
));
51 case SD_IPV4LL_EVENT_CONFLICT
:
52 log_info("conflict on %s", strna(address
));
54 case SD_IPV4LL_EVENT_STOP
:
55 log_error("the client was stopped with address %s", strna(address
));
58 assert_not_reached("invalid LL event");
62 static int client_run(int ifindex
, const char *seed_str
, const struct ether_addr
*ha
, sd_event
*e
) {
65 assert_se(sd_ipv4ll_new(&ll
) >= 0);
66 assert_se(sd_ipv4ll_attach_event(ll
, e
, 0) >= 0);
68 assert_se(sd_ipv4ll_set_ifindex(ll
, ifindex
) >= 0);
69 assert_se(sd_ipv4ll_set_mac(ll
, ha
) >= 0);
70 assert_se(sd_ipv4ll_set_callback(ll
, ll_handler
, NULL
) >= 0);
75 assert_se(safe_atou(seed_str
, &seed
) >= 0);
77 assert_se(sd_ipv4ll_set_address_seed(ll
, seed
) >= 0);
80 log_info("starting IPv4LL client");
82 assert_se(sd_ipv4ll_start(ll
) >= 0);
84 assert_se(sd_event_loop(e
) >= 0);
86 assert_se(!sd_ipv4ll_unref(ll
));
91 static int test_ll(const char *ifname
, const char *seed
) {
92 _cleanup_(sd_event_unrefp
) sd_event
*e
= NULL
;
93 _cleanup_(sd_netlink_unrefp
) sd_netlink
*rtnl
= NULL
;
94 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*m
= NULL
, *reply
= NULL
;
98 assert_se(sd_event_new(&e
) >= 0);
100 assert_se(sd_netlink_open(&rtnl
) >= 0);
101 assert_se(sd_netlink_attach_event(rtnl
, e
, 0) >= 0);
103 assert_se(sd_rtnl_message_new_link(rtnl
, &m
, RTM_GETLINK
, 0) >= 0);
104 assert_se(sd_netlink_message_append_string(m
, IFLA_IFNAME
, ifname
) >= 0);
105 assert_se(sd_netlink_call(rtnl
, m
, 0, &reply
) >= 0);
107 assert_se(sd_rtnl_message_link_get_ifindex(reply
, &ifindex
) >= 0);
108 assert_se(sd_netlink_message_read_ether_addr(reply
, IFLA_ADDRESS
, &ha
) >= 0);
110 client_run(ifindex
, seed
, &ha
, e
);
115 int main(int argc
, char *argv
[]) {
116 log_set_max_level(LOG_DEBUG
);
117 log_parse_environment();
121 return test_ll(argv
[1], NULL
);
123 return test_ll(argv
[1], argv
[2]);
125 log_error("This program takes one or two arguments.\n"
126 "\t %s <ifname> [<seed>]", program_invocation_short_name
);