src/libsystemd-network/test-acd.c

   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
   8 #include <errno.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11
  12 #include <linux/veth.h>
  13 #include <net/if.h>
  14
  15 #include "sd-event.h"
  16 #include "sd-ipv4acd.h"
  17 #include "sd-netlink.h"
  18
  19 #include "in-addr-util.h"
  20 #include "netlink-util.h"
  21 #include "util.h"
  22
  23 static void acd_handler(sd_ipv4acd *acd, int event, void *userdata) {
  24         assert_se(acd);
  25
  26         switch (event) {
  27         case SD_IPV4ACD_EVENT_BIND:
  28                 log_info("bound");
  29                 break;
  30         case SD_IPV4ACD_EVENT_CONFLICT:
  31                 log_info("conflict");
  32                 break;
  33         case SD_IPV4ACD_EVENT_STOP:
  34                 log_error("the client was stopped");
  35                 break;
  36         default:
  37                 assert_not_reached("invalid ACD event");
  38         }
  39 }
  40
  41 static int client_run(int ifindex, const struct in_addr *pa, const struct ether_addr *ha, sd_event *e) {
  42         sd_ipv4acd *acd;
  43
  44         assert_se(sd_ipv4acd_new(&acd) >= 0);
  45         assert_se(sd_ipv4acd_attach_event(acd, e, 0) >= 0);
  46
  47         assert_se(sd_ipv4acd_set_ifindex(acd, ifindex) >= 0);
  48         assert_se(sd_ipv4acd_set_mac(acd, ha) >= 0);
  49         assert_se(sd_ipv4acd_set_address(acd, pa) >= 0);
  50         assert_se(sd_ipv4acd_set_callback(acd, acd_handler, NULL) >= 0);
  51
  52         log_info("starting IPv4ACD client");
  53
  54         assert_se(sd_ipv4acd_start(acd) >= 0);
  55
  56         assert_se(sd_event_loop(e) >= 0);
  57
  58         assert_se(!sd_ipv4acd_unref(acd));
  59
  60         return EXIT_SUCCESS;
  61 }
  62
  63 static int test_acd(const char *ifname, const char *address) {
  64         _cleanup_(sd_event_unrefp) sd_event *e = NULL;
  65         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
  66         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL, *reply = NULL;
  67         union in_addr_union pa;
  68         struct ether_addr ha;
  69         int ifindex;
  70
  71         assert_se(in_addr_from_string(AF_INET, address, &pa) >= 0);
  72
  73         assert_se(sd_event_new(&e) >= 0);
  74
  75         assert_se(sd_netlink_open(&rtnl) >= 0);
  76         assert_se(sd_netlink_attach_event(rtnl, e, 0) >= 0);
  77
  78         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, 0) >= 0);
  79         assert_se(sd_netlink_message_append_string(m, IFLA_IFNAME, ifname) >= 0);
  80         assert_se(sd_netlink_call(rtnl, m, 0, &reply) >= 0);
  81
  82         assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
  83         assert_se(sd_netlink_message_read_ether_addr(reply, IFLA_ADDRESS, &ha) >= 0);
  84
  85         client_run(ifindex, &pa.in, &ha, e);
  86
  87         return EXIT_SUCCESS;
  88 }
  89
  90 int main(int argc, char *argv[]) {
  91         log_set_max_level(LOG_DEBUG);
  92         log_parse_environment();
  93         log_open();
  94
  95         if (argc == 3)
  96                 return test_acd(argv[1], argv[2]);
  97         else {
  98                 log_error("This program takes two arguments.\n"
  99                           "\t %s <ifname> <IPv4 address>", program_invocation_short_name);
 100                 return EXIT_FAILURE;
 101         }
 102 }