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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
7b713b81 TG |
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 | ||
7b713b81 | 21 | #include <errno.h> |
07630cea LP |
22 | #include <net/if.h> |
23 | #include <stdlib.h> | |
7b713b81 | 24 | #include <unistd.h> |
7b713b81 | 25 | #include <linux/veth.h> |
7b713b81 TG |
26 | |
27 | #include "sd-event.h" | |
7b713b81 | 28 | #include "sd-ipv4ll.h" |
07630cea | 29 | #include "sd-netlink.h" |
7b713b81 | 30 | |
b5efdb8a | 31 | #include "alloc-util.h" |
7b713b81 | 32 | #include "in-addr-util.h" |
07630cea | 33 | #include "netlink-util.h" |
6bedfcbb | 34 | #include "parse-util.h" |
07630cea LP |
35 | #include "string-util.h" |
36 | #include "util.h" | |
7b713b81 TG |
37 | |
38 | static void ll_handler(sd_ipv4ll *ll, int event, void *userdata) { | |
39 | _cleanup_free_ char *address = NULL; | |
40 | struct in_addr addr = {}; | |
41 | ||
42 | assert_se(ll); | |
43 | ||
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); | |
46 | ||
47 | switch (event) { | |
be19c5b5 | 48 | case SD_IPV4LL_EVENT_BIND: |
7b713b81 TG |
49 | log_info("bound %s", strna(address)); |
50 | break; | |
be19c5b5 | 51 | case SD_IPV4LL_EVENT_CONFLICT: |
7b713b81 TG |
52 | log_info("conflict on %s", strna(address)); |
53 | break; | |
be19c5b5 | 54 | case SD_IPV4LL_EVENT_STOP: |
7b713b81 TG |
55 | log_error("the client was stopped with address %s", strna(address)); |
56 | break; | |
57 | default: | |
58 | assert_not_reached("invalid LL event"); | |
59 | } | |
60 | } | |
61 | ||
62 | static int client_run(int ifindex, const char *seed_str, const struct ether_addr *ha, sd_event *e) { | |
63 | sd_ipv4ll *ll; | |
64 | ||
65 | assert_se(sd_ipv4ll_new(&ll) >= 0); | |
66 | assert_se(sd_ipv4ll_attach_event(ll, e, 0) >= 0); | |
67 | ||
2f8e7633 | 68 | assert_se(sd_ipv4ll_set_ifindex(ll, ifindex) >= 0); |
7b713b81 TG |
69 | assert_se(sd_ipv4ll_set_mac(ll, ha) >= 0); |
70 | assert_se(sd_ipv4ll_set_callback(ll, ll_handler, NULL) >= 0); | |
71 | ||
72 | if (seed_str) { | |
73 | unsigned seed; | |
74 | ||
75 | assert_se(safe_atou(seed_str, &seed) >= 0); | |
76 | ||
77 | assert_se(sd_ipv4ll_set_address_seed(ll, seed) >= 0); | |
78 | } | |
79 | ||
80 | log_info("starting IPv4LL client"); | |
81 | ||
82 | assert_se(sd_ipv4ll_start(ll) >= 0); | |
83 | ||
84 | assert_se(sd_event_loop(e) >= 0); | |
85 | ||
86 | assert_se(!sd_ipv4ll_unref(ll)); | |
87 | ||
88 | return EXIT_SUCCESS; | |
89 | } | |
90 | ||
91 | static int test_ll(const char *ifname, const char *seed) { | |
4afd3348 LP |
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; | |
7b713b81 TG |
95 | struct ether_addr ha; |
96 | int ifindex; | |
97 | ||
98 | assert_se(sd_event_new(&e) >= 0); | |
99 | ||
100 | assert_se(sd_netlink_open(&rtnl) >= 0); | |
101 | assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0); | |
102 | ||
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); | |
106 | ||
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); | |
109 | ||
110 | client_run(ifindex, seed, &ha, e); | |
111 | ||
112 | return EXIT_SUCCESS; | |
113 | } | |
114 | ||
115 | int main(int argc, char *argv[]) { | |
116 | log_set_max_level(LOG_DEBUG); | |
117 | log_parse_environment(); | |
118 | log_open(); | |
119 | ||
120 | if (argc == 2) | |
121 | return test_ll(argv[1], NULL); | |
122 | else if (argc == 3) | |
123 | return test_ll(argv[1], argv[2]); | |
124 | else { | |
125 | log_error("This program takes one or two arguments.\n" | |
126 | "\t %s <ifname> [<seed>]", program_invocation_short_name); | |
127 | return EXIT_FAILURE; | |
128 | } | |
129 | } |