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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright (C) 2014 Tom Gundersen <teg@jklm.no> | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
7b713b81 | 22 | #include <errno.h> |
07630cea LP |
23 | #include <net/if.h> |
24 | #include <stdlib.h> | |
7b713b81 | 25 | #include <unistd.h> |
7b713b81 | 26 | #include <linux/veth.h> |
7b713b81 TG |
27 | |
28 | #include "sd-event.h" | |
7b713b81 | 29 | #include "sd-ipv4ll.h" |
07630cea | 30 | #include "sd-netlink.h" |
7b713b81 | 31 | |
b5efdb8a | 32 | #include "alloc-util.h" |
7b713b81 | 33 | #include "in-addr-util.h" |
07630cea | 34 | #include "netlink-util.h" |
6bedfcbb | 35 | #include "parse-util.h" |
07630cea LP |
36 | #include "string-util.h" |
37 | #include "util.h" | |
7b713b81 TG |
38 | |
39 | static void ll_handler(sd_ipv4ll *ll, int event, void *userdata) { | |
40 | _cleanup_free_ char *address = NULL; | |
41 | struct in_addr addr = {}; | |
42 | ||
43 | assert_se(ll); | |
44 | ||
45 | if (sd_ipv4ll_get_address(ll, &addr) >= 0) | |
46 | assert_se(in_addr_to_string(AF_INET, (const union in_addr_union*) &addr, &address) >= 0); | |
47 | ||
48 | switch (event) { | |
be19c5b5 | 49 | case SD_IPV4LL_EVENT_BIND: |
7b713b81 TG |
50 | log_info("bound %s", strna(address)); |
51 | break; | |
be19c5b5 | 52 | case SD_IPV4LL_EVENT_CONFLICT: |
7b713b81 TG |
53 | log_info("conflict on %s", strna(address)); |
54 | break; | |
be19c5b5 | 55 | case SD_IPV4LL_EVENT_STOP: |
7b713b81 TG |
56 | log_error("the client was stopped with address %s", strna(address)); |
57 | break; | |
58 | default: | |
59 | assert_not_reached("invalid LL event"); | |
60 | } | |
61 | } | |
62 | ||
63 | static int client_run(int ifindex, const char *seed_str, const struct ether_addr *ha, sd_event *e) { | |
64 | sd_ipv4ll *ll; | |
65 | ||
66 | assert_se(sd_ipv4ll_new(&ll) >= 0); | |
67 | assert_se(sd_ipv4ll_attach_event(ll, e, 0) >= 0); | |
68 | ||
69 | assert_se(sd_ipv4ll_set_index(ll, ifindex) >= 0); | |
70 | assert_se(sd_ipv4ll_set_mac(ll, ha) >= 0); | |
71 | assert_se(sd_ipv4ll_set_callback(ll, ll_handler, NULL) >= 0); | |
72 | ||
73 | if (seed_str) { | |
74 | unsigned seed; | |
75 | ||
76 | assert_se(safe_atou(seed_str, &seed) >= 0); | |
77 | ||
78 | assert_se(sd_ipv4ll_set_address_seed(ll, seed) >= 0); | |
79 | } | |
80 | ||
81 | log_info("starting IPv4LL client"); | |
82 | ||
83 | assert_se(sd_ipv4ll_start(ll) >= 0); | |
84 | ||
85 | assert_se(sd_event_loop(e) >= 0); | |
86 | ||
87 | assert_se(!sd_ipv4ll_unref(ll)); | |
88 | ||
89 | return EXIT_SUCCESS; | |
90 | } | |
91 | ||
92 | static int test_ll(const char *ifname, const char *seed) { | |
4afd3348 LP |
93 | _cleanup_(sd_event_unrefp) sd_event *e = NULL; |
94 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; | |
95 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL; | |
7b713b81 TG |
96 | struct ether_addr ha; |
97 | int ifindex; | |
98 | ||
99 | assert_se(sd_event_new(&e) >= 0); | |
100 | ||
101 | assert_se(sd_netlink_open(&rtnl) >= 0); | |
102 | assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0); | |
103 | ||
104 | assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0); | |
105 | assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0); | |
106 | assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0); | |
107 | ||
108 | assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0); | |
109 | assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0); | |
110 | ||
111 | client_run(ifindex, seed, &ha, e); | |
112 | ||
113 | return EXIT_SUCCESS; | |
114 | } | |
115 | ||
116 | int main(int argc, char *argv[]) { | |
117 | log_set_max_level(LOG_DEBUG); | |
118 | log_parse_environment(); | |
119 | log_open(); | |
120 | ||
121 | if (argc == 2) | |
122 | return test_ll(argv[1], NULL); | |
123 | else if (argc == 3) | |
124 | return test_ll(argv[1], argv[2]); | |
125 | else { | |
126 | log_error("This program takes one or two arguments.\n" | |
127 | "\t %s <ifname> [<seed>]", program_invocation_short_name); | |
128 | return EXIT_FAILURE; | |
129 | } | |
130 | } |