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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | /*** | |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright (C) 2014 Tom Gundersen <teg@jklm.no> | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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/>. | |
19 | ***/ | |
20 | ||
21 | #include <errno.h> | |
22 | #include <stdlib.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | #include <linux/veth.h> | |
26 | #include <net/if.h> | |
27 | ||
28 | #include "sd-event.h" | |
29 | #include "sd-ipv4acd.h" | |
30 | #include "sd-netlink.h" | |
31 | ||
32 | #include "in-addr-util.h" | |
33 | #include "netlink-util.h" | |
34 | #include "util.h" | |
35 | ||
36 | static void acd_handler(sd_ipv4acd *acd, int event, void *userdata) { | |
37 | assert_se(acd); | |
38 | ||
39 | switch (event) { | |
40 | case SD_IPV4ACD_EVENT_BIND: | |
41 | log_info("bound"); | |
42 | break; | |
43 | case SD_IPV4ACD_EVENT_CONFLICT: | |
44 | log_info("conflict"); | |
45 | break; | |
46 | case SD_IPV4ACD_EVENT_STOP: | |
47 | log_error("the client was stopped"); | |
48 | break; | |
49 | default: | |
50 | assert_not_reached("invalid ACD event"); | |
51 | } | |
52 | } | |
53 | ||
54 | static int client_run(int ifindex, const struct in_addr *pa, const struct ether_addr *ha, sd_event *e) { | |
55 | sd_ipv4acd *acd; | |
56 | ||
57 | assert_se(sd_ipv4acd_new(&acd) >= 0); | |
58 | assert_se(sd_ipv4acd_attach_event(acd, e, 0) >= 0); | |
59 | ||
60 | assert_se(sd_ipv4acd_set_ifindex(acd, ifindex) >= 0); | |
61 | assert_se(sd_ipv4acd_set_mac(acd, ha) >= 0); | |
62 | assert_se(sd_ipv4acd_set_address(acd, pa) >= 0); | |
63 | assert_se(sd_ipv4acd_set_callback(acd, acd_handler, NULL) >= 0); | |
64 | ||
65 | log_info("starting IPv4ACD client"); | |
66 | ||
67 | assert_se(sd_ipv4acd_start(acd) >= 0); | |
68 | ||
69 | assert_se(sd_event_loop(e) >= 0); | |
70 | ||
71 | assert_se(!sd_ipv4acd_unref(acd)); | |
72 | ||
73 | return EXIT_SUCCESS; | |
74 | } | |
75 | ||
76 | static int test_acd(const char *ifname, const char *address) { | |
77 | _cleanup_(sd_event_unrefp) sd_event *e = NULL; | |
78 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; | |
79 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL; | |
80 | union in_addr_union pa; | |
81 | struct ether_addr ha; | |
82 | int ifindex; | |
83 | ||
84 | assert_se(in_addr_from_string(AF_INET, address, &pa) >= 0); | |
85 | ||
86 | assert_se(sd_event_new(&e) >= 0); | |
87 | ||
88 | assert_se(sd_netlink_open(&rtnl) >= 0); | |
89 | assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0); | |
90 | ||
91 | assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0); | |
92 | assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0); | |
93 | assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0); | |
94 | ||
95 | assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0); | |
96 | assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0); | |
97 | ||
98 | client_run(ifindex, &pa.in, &ha, e); | |
99 | ||
100 | return EXIT_SUCCESS; | |
101 | } | |
102 | ||
103 | int main(int argc, char *argv[]) { | |
104 | log_set_max_level(LOG_DEBUG); | |
105 | log_parse_environment(); | |
106 | log_open(); | |
107 | ||
108 | if (argc == 3) | |
109 | return test_acd(argv[1], argv[2]); | |
110 | else { | |
111 | log_error("This program takes two arguments.\n" | |
112 | "\t %s <ifname> <IPv4 address>", program_invocation_short_name); | |
113 | return EXIT_FAILURE; | |
114 | } | |
115 | } |